Format meson.build for readability

Commit dfed1b250e replaced SDL types by
standard types in sources, but tests were not updated.

BUILD.md

@@ -234,10 +234,10 @@ You can then [run](README.md#run) _scrcpy_.
 
 ## Prebuilt server
 
- - [`scrcpy-server-v1.5.jar`][direct-scrcpy-server]  
+ - [`scrcpy-server-v1.8.jar`][direct-scrcpy-server]  
-   _(SHA-256: d97aab6f60294e33e7ff79c2856ad3e01f912892395131f4f337e9ece03c24de)_
+   _(SHA-256: 839055ef905903bf98ead1b9b8a127fe402b39ad657a81f9a914b2dbcb2ce5c0)_
 
-[direct-scrcpy-server]: https://github.com/Genymobile/scrcpy/releases/download/v1.5-fixversion/scrcpy-server-v1.5.jar
+[direct-scrcpy-server]: https://github.com/Genymobile/scrcpy/releases/download/v1.8/scrcpy-server-v1.8.jar
 
 Download the prebuilt server somewhere, and specify its path during the Meson
 configuration:

DEVELOP.md

@@ -32,7 +32,7 @@ The server is a Java application (with a [`public static void main(String...
 args)`][main] method), compiled against the Android framework, and executed as
 `shell` on the Android device.
 
-[main]: https://github.com/Genymobile/scrcpy/blob/v1.0/server/src/main/java/com/genymobile/scrcpy/Server.java#L61
+[main]: https://github.com/Genymobile/scrcpy/blob/v1.8/server/src/main/java/com/genymobile/scrcpy/Server.java#L100
 
 To run such a Java application, the classes must be [_dexed_][dex] (typically,
 to `classes.dex`). If `my.package.MainClass` is the main class, compiled to
@@ -65,8 +65,8 @@ They can be called using reflection though. The communication with hidden
 components is provided by [_wrappers_ classes][wrappers] and [aidl].
 
 [hidden]: https://stackoverflow.com/a/31908373/1987178
-[wrappers]: https://github.com/Genymobile/scrcpy/blob/v1.0/server/src/main/java/com/genymobile/scrcpy/wrappers
+[wrappers]: https://github.com/Genymobile/scrcpy/blob/v1.8/server/src/main/java/com/genymobile/scrcpy/wrappers
-[aidl]: https://github.com/Genymobile/scrcpy/blob/v1.0/server/src/main/aidl/android/view
+[aidl]: https://github.com/Genymobile/scrcpy/blob/v1.8/server/src/main/aidl/android/view
 
 
 ### Threading
@@ -89,9 +89,9 @@ The video is encoded using the [`MediaCodec`] API. The codec takes its input
 from a [surface] associated to the display, and writes the resulting H.264
 stream to the provided output stream (the socket connected to the client).
 
-[`ScreenEncoder`]: https://github.com/Genymobile/scrcpy/blob/v1.0/server/src/main/java/com/genymobile/scrcpy/ScreenEncoder.java
+[`ScreenEncoder`]: https://github.com/Genymobile/scrcpy/blob/v1.8/server/src/main/java/com/genymobile/scrcpy/ScreenEncoder.java
 [`MediaCodec`]: https://developer.android.com/reference/android/media/MediaCodec.html
-[surface]: https://github.com/Genymobile/scrcpy/blob/v1.0/server/src/main/java/com/genymobile/scrcpy/ScreenEncoder.java#L63-L64
+[surface]: https://github.com/Genymobile/scrcpy/blob/v1.8/server/src/main/java/com/genymobile/scrcpy/ScreenEncoder.java#L69-L70
 
 On device [rotation], the codec, surface and display are reinitialized, and a
 new video stream is produced.
@@ -105,8 +105,9 @@ because it avoids to send unnecessary frames, but there are drawbacks:
 Both problems are [solved][repeat] by the flag
 [`KEY_REPEAT_PREVIOUS_FRAME_AFTER`][repeat-flag].
 
-[rotation]: https://github.com/Genymobile/scrcpy/blob/v1.0/server/src/main/java/com/genymobile/scrcpy/ScreenEncoder.java#L89-L92
+[rotation]: https://github.com/Genymobile/scrcpy/blob/v1.8/server/src/main/java/com/genymobile/scrcpy/ScreenEncoder.java#L90
-[repeat]: https://github.com/Genymobile/scrcpy/blob/v1.0/server/src/main/java/com/genymobile/scrcpy/ScreenEncoder.java#L125-L126
+[repeat]:
+https://github.com/Genymobile/scrcpy/blob/v1.8/server/src/main/java/com/genymobile/scrcpy/ScreenEncoder.java#L147-L148
 [repeat-flag]: https://developer.android.com/reference/android/media/MediaFormat.html#KEY_REPEAT_PREVIOUS_FRAME_AFTER
 
 
@@ -124,11 +125,11 @@ All of them may need to inject input events to the system. To do so, they use
 the _hidden_ method [`InputManager.injectInputEvent`] (exposed by our
 [`InputManager` wrapper][inject-wrapper]).
 
-[`EventController`]: https://github.com/Genymobile/scrcpy/blob/v1.0/server/src/main/java/com/genymobile/scrcpy/EventController.java#L70
+[`EventController`]: https://github.com/Genymobile/scrcpy/blob/v1.8/server/src/main/java/com/genymobile/scrcpy/EventController.java#L66
 [`KeyEvent`]: https://developer.android.com/reference/android/view/KeyEvent.html
 [`MotionEvent`]: https://developer.android.com/reference/android/view/MotionEvent.html
 [`InputManager.injectInputEvent`]: https://android.googlesource.com/platform/frameworks/base/+/oreo-release/core/java/android/hardware/input/InputManager.java#857
-[inject-wrapper]: https://github.com/Genymobile/scrcpy/blob/v1.0/server/src/main/java/com/genymobile/scrcpy/wrappers/InputManager.java#L27
+[inject-wrapper]: https://github.com/Genymobile/scrcpy/blob/v1.8/server/src/main/java/com/genymobile/scrcpy/wrappers/InputManager.java#L27
 
 
 
@@ -153,7 +154,7 @@ Note that the client-server roles are expressed at the application level:
  - the server _serves_ video stream and handle requests from the client,
  - the client _controls_ the device through the server.
 
-However, the roles are inverted at the network level:
+However, the roles are reversed at the network level:
 
  - the client opens a server socket and listen on a port before starting the
    server,
@@ -162,6 +163,9 @@ However, the roles are inverted at the network level:
 This role inversion guarantees that the connection will not fail due to race
 conditions, and avoids polling.
 
+_(Note that over TCP/IP, the roles are not reversed, due to a bug in `adb
+reverse`. See commit [1038bad] and [issue #5].)_
+
 Once the server is connected, it sends the device information (name and initial
 screen dimensions). Thus, the client may init the window and renderer, before
 the first frame is available.
@@ -169,6 +173,8 @@ the first frame is available.
 To minimize startup time, SDL initialization is performed while listening for
 the connection from the server (see commit [90a46b4]).
 
+[1038bad]: https://github.com/Genymobile/scrcpy/commit/1038bad3850f18717a048a4d5c0f8110e54ee172
+[issue #5]: https://github.com/Genymobile/scrcpy/issues/5
 [90a46b4]: https://github.com/Genymobile/scrcpy/commit/90a46b4c45637d083e877020d85ade52a9a5fa8e
 
 
@@ -177,17 +183,25 @@ the connection from the server (see commit [90a46b4]).
 The client uses 3 threads:
 
  - the **main** thread, executing the SDL event loop,
- - the **decoder** thread, decoding video frames,
+ - the **stream** thread, receiving the video and used for decoding and
+   recording,
  - the **controller** thread, sending _control events_ to the server.
 
+In addition, another thread can be started if necessary to handle APK
+installation or file push requests (via drag&drop on the main window).
 
-### Decoder
 
-The [decoder] runs in a separate thread. It uses _libav_ to decode the H.264
-stream from the socket, and notifies the main thread when a new frame is
-available.
 
-There are two [frames] simultaneously in memory:
+### Stream
+
+The video [stream] is received from the socket (connected to the server on the
+device) in a separate thread.
+
+If a [decoder] is present (i.e. `--no-display` is not set), then it uses _libav_
+to decode the H.264 stream from the socket, and notifies the main thread when a
+new frame is available.
+
+There are two [frames][video_buffer] simultaneously in memory:
  - the **decoding** frame, written by the decoder from the decoder thread,
  - the **rendering** frame, rendered in a texture from the main thread.
 
@@ -195,9 +209,23 @@ When a new decoded frame is available, the decoder _swaps_ the decoding and
 rendering frame (with proper synchronization). Thus, it immediatly starts
 to decode a new frame while the main thread renders the last one.
 
-[decoder]: https://github.com/Genymobile/scrcpy/blob/v1.0/app/src/decoder.c
+If a [recorder] is present (i.e. `--record` is enabled), then its muxes the raw
-[frames]: https://github.com/Genymobile/scrcpy/blob/v1.0/app/src/frames.h
+H.264 packet to the output video file.
 
+[stream]: https://github.com/Genymobile/scrcpy/blob/v1.8/app/src/stream.h
+[decoder]: https://github.com/Genymobile/scrcpy/blob/v1.8/app/src/decoder.h
+[video_buffer]: https://github.com/Genymobile/scrcpy/blob/v1.8/app/src/video_buffer.h
+[recorder]: https://github.com/Genymobile/scrcpy/blob/v1.8/app/src/recorder.h
+
+```
+                                   +----------+      +----------+
+                              ---> | decoder  | ---> |  screen  |
+             +---------+     /     +----------+      +----------+
+ socket ---> | stream  | ----
+             +---------+     \     +----------+
+                              ---> | recorder |
+                                   +----------+
+```
 
 ### Controller
 
@@ -211,10 +239,10 @@ events_ to a blocking queue hold by the controller. On its own thread, the
 controller takes events from the queue, that it serializes and sends to the
 client.
 
-[controller]: https://github.com/Genymobile/scrcpy/blob/v1.0/app/src/controller.h
+[controller]: https://github.com/Genymobile/scrcpy/blob/v1.8/app/src/controller.h
-[controlevent]: https://github.com/Genymobile/scrcpy/blob/v1.0/app/src/controlevent.h
+[controlevent]: https://github.com/Genymobile/scrcpy/blob/v1.8/app/src/control_event.h
-[inputmanager]: https://github.com/Genymobile/scrcpy/blob/v1.0/app/src/inputmanager.h
+[inputmanager]: https://github.com/Genymobile/scrcpy/blob/v1.8/app/src/input_manager.h
-[convert]: https://github.com/Genymobile/scrcpy/blob/v1.0/app/src/convert.h
+[convert]: https://github.com/Genymobile/scrcpy/blob/v1.8/app/src/convert.h
 
 
 ### UI and event loop
@@ -225,9 +253,10 @@ thread.
 Events are handled in the [event loop], which either updates the [screen] or
 delegates to the [input manager][inputmanager].
 
-[scrcpy]: https://github.com/Genymobile/scrcpy/blob/v1.0/app/src/scrcpy.c
+[scrcpy]: https://github.com/Genymobile/scrcpy/blob/v1.8/app/src/scrcpy.c
-[event loop]: https://github.com/Genymobile/scrcpy/blob/v1.0/app/src/scrcpy.c#L38
+[event loop]:
-[screen]: https://github.com/Genymobile/scrcpy/blob/v1.0/app/src/screen.h
+https://github.com/Genymobile/scrcpy/blob/v1.8/app/src/scrcpy.c#L187
+[screen]: https://github.com/Genymobile/scrcpy/blob/v1.8/app/src/screen.h
 
 
 ## Hack

Makefile.CrossWindows

@@ -34,7 +34,7 @@ WIN32_TARGET := $(WIN32_TARGET_DIR)-$(VERSION).zip
 WIN64_TARGET := $(WIN64_TARGET_DIR)-$(VERSION).zip
 
 release: clean zip-win32 zip-win64 sums
-	@echo "Release created in $(DIST)/."
+	@echo "Windows archives generated in $(DIST)/"
 
 clean:
 	$(GRADLE) clean

README.md

@@ -1,4 +1,4 @@
-# scrcpy (v1.5)
+# scrcpy (v1.8)
 
 This application provides display and control of Android devices connected on
 USB (or [over TCP/IP][article-tcpip]). It does not require any _root_ access.
@@ -29,12 +29,10 @@ control it using keyboard and mouse.
 On Linux, you typically need to [build the app manually][BUILD]. Don't worry,
 it's not that hard.
 
-For Arch Linux, two [AUR] packages have been created by users:
+For Arch Linux, an [AUR] package is available: [`scrcpy`][aur-link].
-
- - [`scrcpy`](https://aur.archlinux.org/packages/scrcpy/)
- - [`scrcpy-prebuiltserver`](https://aur.archlinux.org/packages/scrcpy-prebuiltserver/)
 
 [AUR]: https://wiki.archlinux.org/index.php/Arch_User_Repository
+[aur-link]: https://aur.archlinux.org/packages/scrcpy/
 
 For Gentoo, an [Ebuild] is available: [`scrcpy/`][ebuild-link].
 
@@ -47,13 +45,13 @@ For Gentoo, an [Ebuild] is available: [`scrcpy/`][ebuild-link].
 For Windows, for simplicity, prebuilt archives with all the dependencies
 (including `adb`) are available:
 
- - [`scrcpy-win32-v1.5.zip`][direct-win32]  
+ - [`scrcpy-win32-v1.8.zip`][direct-win32]  
-   _(SHA-256: 46ae0d4c1c6bd049ec4a30080d2ad91a32b31d3f758afdca2c3a915ecabf02c1)_
+   _(SHA-256: c0c29ed1c66deaa73bdadacd09e598aafb3a117929cf7a314cce1cc45e34de53)_
- - [`scrcpy-win64-v1.5.zip`][direct-win64]  
+ - [`scrcpy-win64-v1.8.zip`][direct-win64]  
-   _(SHA-256: 89daa07325129617cf943a84bc4e304ee5e57118416fe265b9b5d4a1bf87c501)_
+   _(SHA-256: 9cc980d07bd8f036ae4e91d0bc6fc3281d7fa8f9752d4913b643c0fb72a19fb7)_
 
-[direct-win32]: https://github.com/Genymobile/scrcpy/releases/download/v1.5-fixversion/scrcpy-win32-v1.5.zip
+[direct-win32]: https://github.com/Genymobile/scrcpy/releases/download/v1.8/scrcpy-win32-v1.8.zip
-[direct-win64]: https://github.com/Genymobile/scrcpy/releases/download/v1.5-fixversion/scrcpy-win64-v1.5.zip
+[direct-win64]: https://github.com/Genymobile/scrcpy/releases/download/v1.8/scrcpy-win64-v1.8.zip
 
 You can also [build the app manually][BUILD].
 
@@ -162,7 +160,16 @@ It is possible to record the screen while mirroring:
 
 ```bash
 scrcpy --record file.mp4
-scrcpy -r file.mp4
+scrcpy -r file.mkv
+```
+
+To disable mirroring while recording:
+
+```bash
+scrcpy --no-display --record file.mp4
+scrcpy -Nr file.mkv
+# interrupt recording with Ctrl+C
+# Ctrl+C does not terminate properly on Windows, so disconnect the device
 ```
 
 "Skipped frames" are recorded, even if they are not displayed in real time (for
@@ -196,6 +203,16 @@ scrcpy -f  # short version
 Fullscreen can then be toggled dynamically with `Ctrl`+`f`.
 
 
+### Always on top
+
+The window of app can always be above others by:
+
+```bash
+scrcpy --always-on-top
+scrcpy -T  # short version
+```
+
+
 ### Show touches
 
 For presentations, it may be useful to show physical touches (on the physical
@@ -229,6 +246,17 @@ _scrcpy_ window.
 There is no visual feedback, a log is printed to the console.
 
 
+### Read-only
+
+To disable controls (everything which can interact with the device: input keys,
+mouse events, drag&drop files):
+
+```bash
+scrcpy --no-control
+scrcpy -n
+```
+
+
 ### Forward audio
 
 Audio is not forwarded by _scrcpy_.
@@ -257,6 +285,8 @@ you are interested, see [issue 14].
  | click on `VOLUME_DOWN`                 | `Ctrl`+`↓` _(down)_ (`Cmd`+`↓` on MacOS) |
  | click on `POWER`                       | `Ctrl`+`p`                    |
  | turn screen on                         | _Right-click²_                |
+ | expand notification panel              | `Ctrl`+`n`                    |
+ | collapse notification panel            | `Ctrl`+`Shift`+`n`            |
  | paste computer clipboard to device     | `Ctrl`+`v`                    |
  | enable/disable FPS counter (on stdout) | `Ctrl`+`i`                    |
 
@@ -264,6 +294,19 @@ _¹Double-click on black borders to remove them._
 _²Right-click turns the screen on if it was off, presses BACK otherwise._
 
 
+## Custom paths
+
+To use a specific _adb_ binary, configure its path in the environment variable
+`ADB`:
+
+    ADB=/path/to/adb scrcpy
+
+To override the path of the `scrcpy-server.jar` file (it can be [useful] on
+Windows), configure its path in `SCRCPY_SERVER_PATH`.
+
+[useful]: https://github.com/Genymobile/scrcpy/issues/278#issuecomment-429330345
+
+
 ## Why _scrcpy_?
 
 A colleague challenged me to find a name as unpronounceable as [gnirehtet].

app/meson.build

@@ -8,7 +8,6 @@ src = [
     'src/device.c',
     'src/file_handler.c',
     'src/fps_counter.c',
-    'src/frames.c',
     'src/input_manager.c',
     'src/lock_util.c',
     'src/net.c',
@@ -18,6 +17,8 @@ src = [
     'src/server.c',
     'src/str_util.c',
     'src/tiny_xpm.c',
+    'src/stream.c',
+    'src/video_buffer.c',
 ]
 
 if not get_option('crossbuild_windows')
@@ -142,18 +143,34 @@ else
     link_args = []
 endif
 
-executable('scrcpy', src, dependencies: dependencies, include_directories: src_dir, install: true, c_args: c_args, link_args: link_args)
+executable('scrcpy', src,
+           dependencies: dependencies,
+           include_directories: src_dir,
+           install: true,
+           c_args: c_args,
+           link_args: link_args)
 
 
 ### TESTS
 
 tests = [
-    ['test_control_event_queue', ['tests/test_control_event_queue.c', 'src/control_event.c']],
+    ['test_control_event_queue', [
-    ['test_control_event_serialize', ['tests/test_control_event_serialize.c', 'src/control_event.c']],
+        'tests/test_control_event_queue.c',
-    ['test_strutil', ['tests/test_strutil.c', 'src/str_util.c']],
+        'src/control_event.c'
+    ]],
+    ['test_control_event_serialize', [
+        'tests/test_control_event_serialize.c',
+        'src/control_event.c'
+    ]],
+    ['test_strutil', [
+        'tests/test_strutil.c',
+        'src/str_util.c'
+    ]],
 ]
 
 foreach t : tests
-    exe = executable(t[0], t[1], include_directories: src_dir, dependencies: dependencies)
+    exe = executable(t[0], t[1],
+                     include_directories: src_dir,
+                     dependencies: dependencies)
     test(t[0], exe)
 endforeach

app/src/buffer_util.h

@@ -1,28 +1,33 @@
 #ifndef BUFFER_UTIL_H
 #define BUFFER_UTIL_H
 
-#include <SDL2/SDL_stdinc.h>
+#include <stdbool.h>
+#include <stdint.h>
 
-static inline void buffer_write16be(Uint8 *buf, Uint16 value) {
+static inline void
+buffer_write16be(uint8_t *buf, uint16_t value) {
     buf[0] = value >> 8;
     buf[1] = value;
 }
 
-static inline void buffer_write32be(Uint8 *buf, Uint32 value) {
+static inline void
+buffer_write32be(uint8_t *buf, uint32_t value) {
     buf[0] = value >> 24;
     buf[1] = value >> 16;
     buf[2] = value >> 8;
     buf[3] = value;
 }
 
-static inline Uint32 buffer_read32be(Uint8 *buf) {
+static inline uint32_t
+buffer_read32be(uint8_t *buf) {
     return (buf[0] << 24) | (buf[1] << 16) | (buf[2] << 8) | buf[3];
 }
 
-static inline Uint64 buffer_read64be(Uint8 *buf) {
+static inline
-    Uint32 msb = buffer_read32be(buf);
+uint64_t buffer_read64be(uint8_t *buf) {
-    Uint32 lsb = buffer_read32be(&buf[4]);
+    uint32_t msb = buffer_read32be(buf);
-    return ((Uint64) msb << 32) | lsb;
+    uint32_t lsb = buffer_read32be(&buf[4]);
+    return ((uint64_t) msb << 32) | lsb;
 }
 
 #endif

app/src/command.c

@@ -1,5 +1,6 @@
 #include "command.h"
 
+#include <assert.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
@@ -10,7 +11,8 @@
 
 static const char *adb_command;
 
-static inline const char *get_adb_command(void) {
+static inline const char *
+get_adb_command(void) {
     if (!adb_command) {
         adb_command = getenv("ADB");
         if (!adb_command)
@@ -19,14 +21,52 @@ static inline const char *get_adb_command(void) {
     return adb_command;
 }
 
-static void show_adb_err_msg(enum process_result err) {
+// serialize argv to string "[arg1], [arg2], [arg3]"
+static size_t
+argv_to_string(const char *const *argv, char *buf, size_t bufsize) {
+    size_t idx = 0;
+    bool first = true;
+    while (*argv) {
+        const char *arg = *argv;
+        size_t len = strlen(arg);
+        // count space for "[], ...\0"
+        if (idx + len + 8 >= bufsize) {
+            // not enough space, truncate
+            assert(idx < bufsize - 4);
+            memcpy(&buf[idx], "...", 3);
+            idx += 3;
+            break;
+        }
+        if (first) {
+            first = false;
+        } else {
+            buf[idx++] = ',';
+            buf[idx++] = ' ';
+        }
+        buf[idx++] = '[';
+        memcpy(&buf[idx], arg, len);
+        idx += len;
+        buf[idx++] = ']';
+        argv++;
+    }
+    assert(idx < bufsize);
+    buf[idx] = '\0';
+    return idx;
+}
+
+static void
+show_adb_err_msg(enum process_result err, const char *const argv[]) {
+    char buf[512];
     switch (err) {
         case PROCESS_ERROR_GENERIC:
-            LOGE("Failed to execute adb");
+            argv_to_string(argv, buf, sizeof(buf));
+            LOGE("Failed to execute: %s", buf);
             break;
         case PROCESS_ERROR_MISSING_BINARY:
-            LOGE("'adb' command not found (make it accessible from your PATH "
+            argv_to_string(argv, buf, sizeof(buf));
-                  "or define its full path in the ADB environment variable)");
+            LOGE("Command not found: %s", buf);
+            LOGE("(make 'adb' accessible from your PATH or define its full"
+                 "path in the ADB environment variable)");
             break;
         case PROCESS_SUCCESS:
             /* do nothing */
@@ -34,7 +74,8 @@ static void show_adb_err_msg(enum process_result err) {
     }
 }
 
-process_t adb_execute(const char *serial, const char *const adb_cmd[], int len) {
+process_t
+adb_execute(const char *serial, const char *const adb_cmd[], size_t len) {
     const char *cmd[len + 4];
     int i;
     process_t process;
@@ -51,13 +92,15 @@ process_t adb_execute(const char *serial, const char *const adb_cmd[], int len)
     cmd[len + i] = NULL;
     enum process_result r = cmd_execute(cmd[0], cmd, &process);
     if (r != PROCESS_SUCCESS) {
-        show_adb_err_msg(r);
+        show_adb_err_msg(r, cmd);
         return PROCESS_NONE;
     }
     return process;
 }
 
-process_t adb_forward(const char *serial, uint16_t local_port, const char *device_socket_name) {
+process_t
+adb_forward(const char *serial, uint16_t local_port,
+            const char *device_socket_name) {
     char local[4 + 5 + 1]; // tcp:PORT
     char remote[108 + 14 + 1]; // localabstract:NAME
     sprintf(local, "tcp:%" PRIu16, local_port);
@@ -66,14 +109,17 @@ process_t adb_forward(const char *serial, uint16_t local_port, const char *devic
     return adb_execute(serial, adb_cmd, ARRAY_LEN(adb_cmd));
 }
 
-process_t adb_forward_remove(const char *serial, uint16_t local_port) {
+process_t
+adb_forward_remove(const char *serial, uint16_t local_port) {
     char local[4 + 5 + 1]; // tcp:PORT
     sprintf(local, "tcp:%" PRIu16, local_port);
     const char *const adb_cmd[] = {"forward", "--remove", local};
     return adb_execute(serial, adb_cmd, ARRAY_LEN(adb_cmd));
 }
 
-process_t adb_reverse(const char *serial, const char *device_socket_name, uint16_t local_port) {
+process_t
+adb_reverse(const char *serial, const char *device_socket_name,
+            uint16_t local_port) {
     char local[4 + 5 + 1]; // tcp:PORT
     char remote[108 + 14 + 1]; // localabstract:NAME
     sprintf(local, "tcp:%" PRIu16, local_port);
@@ -82,14 +128,16 @@ process_t adb_reverse(const char *serial, const char *device_socket_name, uint16
     return adb_execute(serial, adb_cmd, ARRAY_LEN(adb_cmd));
 }
 
-process_t adb_reverse_remove(const char *serial, const char *device_socket_name) {
+process_t
+adb_reverse_remove(const char *serial, const char *device_socket_name) {
     char remote[108 + 14 + 1]; // localabstract:NAME
     snprintf(remote, sizeof(remote), "localabstract:%s", device_socket_name);
     const char *const adb_cmd[] = {"reverse", "--remove", remote};
     return adb_execute(serial, adb_cmd, ARRAY_LEN(adb_cmd));
 }
 
-process_t adb_push(const char *serial, const char *local, const char *remote) {
+process_t
+adb_push(const char *serial, const char *local, const char *remote) {
 #ifdef __WINDOWS__
     // Windows will parse the string, so the paths must be quoted
     // (see sys/win/command.c)
@@ -115,7 +163,8 @@ process_t adb_push(const char *serial, const char *local, const char *remote) {
     return proc;
 }
 
-process_t adb_install(const char *serial, const char *local) {
+process_t
+adb_install(const char *serial, const char *local) {
 #ifdef __WINDOWS__
     // Windows will parse the string, so the local name must be quoted
     // (see sys/win/command.c)
@@ -135,10 +184,11 @@ process_t adb_install(const char *serial, const char *local) {
     return proc;
 }
 
-SDL_bool process_check_success(process_t proc, const char *name) {
+bool
+process_check_success(process_t proc, const char *name) {
     if (proc == PROCESS_NONE) {
         LOGE("Could not execute \"%s\"", name);
-        return SDL_FALSE;
+        return false;
     }
     exit_code_t exit_code;
     if (!cmd_simple_wait(proc, &exit_code)) {
@@ -147,7 +197,7 @@ SDL_bool process_check_success(process_t proc, const char *name) {
         } else {
             LOGE("\"%s\" exited unexpectedly", name);
         }
-        return SDL_FALSE;
+        return false;
     }
-    return SDL_TRUE;
+    return true;
 }

app/src/command.h

@@ -1,35 +1,36 @@
 #ifndef COMMAND_H
 #define COMMAND_H
 
+#include <stdbool.h>
 #include <inttypes.h>
-#include <SDL2/SDL_stdinc.h>
-#include <SDL2/SDL_platform.h>
 
-// <https://stackoverflow.com/a/44383330/1987178>
 #ifdef _WIN32
+
+ // not needed here, but winsock2.h must never be included AFTER windows.h
+# include <winsock2.h>
+# include <windows.h>
 # define PRIexitcode "lu"
+// <https://stackoverflow.com/a/44383330/1987178>
 # ifdef _WIN64
 #   define PRIsizet PRIu64
 # else
 #   define PRIsizet PRIu32
 # endif
-#else
-# define PRIsizet "zu"
-# define PRIexitcode "d"
-#endif
-
-#ifdef __WINDOWS__
-# include <winsock2.h> // not needed here, but must never be included AFTER windows.h
-# include <windows.h>
 # define PROCESS_NONE NULL
   typedef HANDLE process_t;
   typedef DWORD exit_code_t;
+
 #else
+
 # include <sys/types.h>
+# define PRIsizet "zu"
+# define PRIexitcode "d"
 # define PROCESS_NONE -1
   typedef pid_t process_t;
   typedef int exit_code_t;
+
 #endif
+
 # define NO_EXIT_CODE -1
 
 enum process_result {
@@ -38,20 +39,41 @@ enum process_result {
     PROCESS_ERROR_MISSING_BINARY,
 };
 
-enum process_result cmd_execute(const char *path, const char *const argv[], process_t *process);
+enum process_result
-SDL_bool cmd_terminate(process_t pid);
+cmd_execute(const char *path, const char *const argv[], process_t *process);
-SDL_bool cmd_simple_wait(process_t pid, exit_code_t *exit_code);
 
-process_t adb_execute(const char *serial, const char *const adb_cmd[], int len);
+bool
-process_t adb_forward(const char *serial, uint16_t local_port, const char *device_socket_name);
+cmd_terminate(process_t pid);
-process_t adb_forward_remove(const char *serial, uint16_t local_port);
+
-process_t adb_reverse(const char *serial, const char *device_socket_name, uint16_t local_port);
+bool
-process_t adb_reverse_remove(const char *serial, const char *device_socket_name);
+cmd_simple_wait(process_t pid, exit_code_t *exit_code);
-process_t adb_push(const char *serial, const char *local, const char *remote);
+
-process_t adb_install(const char *serial, const char *local);
+process_t
+adb_execute(const char *serial, const char *const adb_cmd[], size_t len);
+
+process_t
+adb_forward(const char *serial, uint16_t local_port,
+            const char *device_socket_name);
+
+process_t
+adb_forward_remove(const char *serial, uint16_t local_port);
+
+process_t
+adb_reverse(const char *serial, const char *device_socket_name,
+            uint16_t local_port);
+
+process_t
+adb_reverse_remove(const char *serial, const char *device_socket_name);
+
+process_t
+adb_push(const char *serial, const char *local, const char *remote);
+
+process_t
+adb_install(const char *serial, const char *local);
 
 // convenience function to wait for a successful process execution
 // automatically log process errors with the provided process name
-SDL_bool process_check_success(process_t process, const char *name);
+bool
+process_check_success(process_t process, const char *name);
 
 #endif

app/src/common.h

@@ -1,25 +1,26 @@
 #ifndef COMMON_H
 #define COMMON_H
 
-#include <SDL2/SDL_stdinc.h>
+#include <stdint.h>
 
 #define ARRAY_LEN(a) (sizeof(a) / sizeof(a[0]))
 #define MIN(X,Y) (X) < (Y) ? (X) : (Y)
 #define MAX(X,Y) (X) > (Y) ? (X) : (Y)
 
 struct size {
-    Uint16 width;
+    uint16_t width;
-    Uint16 height;
+    uint16_t height;
 };
 
 struct point {
-    Sint32 x;
+    int32_t x;
-    Sint32 y;
+    int32_t y;
 };
 
 struct position {
     // The video screen size may be different from the real device screen size,
-    // so store to which size the absolute position apply, to scale it accordingly.
+    // so store to which size the absolute position apply, to scale it
+    // accordingly.
     struct size screen_size;
     struct point point;
 };

app/src/compat.h

@@ -0,0 +1,51 @@
+#ifndef COMPAT_H
+#define COMPAT_H
+
+#include <libavformat/version.h>
+#include <SDL2/SDL_version.h>
+
+// In ffmpeg/doc/APIchanges:
+// 2016-04-11 - 6f69f7a / 9200514 - lavf 57.33.100 / 57.5.0 - avformat.h
+//   Add AVStream.codecpar, deprecate AVStream.codec.
+#if    (LIBAVFORMAT_VERSION_MICRO >= 100 /* FFmpeg */ && \
+        LIBAVFORMAT_VERSION_INT >= AV_VERSION_INT(57, 33, 100)) \
+    || (LIBAVFORMAT_VERSION_MICRO < 100 && /* Libav */ \
+        LIBAVFORMAT_VERSION_INT >= AV_VERSION_INT(57, 5, 0))
+# define SCRCPY_LAVF_HAS_NEW_CODEC_PARAMS_API
+#endif
+
+// In ffmpeg/doc/APIchanges:
+// 2018-02-06 - 0694d87024 - lavf 58.9.100 - avformat.h
+//   Deprecate use of av_register_input_format(), av_register_output_format(),
+//   av_register_all(), av_iformat_next(), av_oformat_next().
+//   Add av_demuxer_iterate(), and av_muxer_iterate().
+#if LIBAVFORMAT_VERSION_INT >= AV_VERSION_INT(58, 9, 100)
+# define SCRCPY_LAVF_HAS_NEW_MUXER_ITERATOR_API
+#else
+# define SCRCPY_LAVF_REQUIRES_REGISTER_ALL
+#endif
+
+// In ffmpeg/doc/APIchanges:
+// 2016-04-21 - 7fc329e - lavc 57.37.100 - avcodec.h
+//   Add a new audio/video encoding and decoding API with decoupled input
+//   and output -- avcodec_send_packet(), avcodec_receive_frame(),
+//   avcodec_send_frame() and avcodec_receive_packet().
+#if LIBAVCODEC_VERSION_INT >= AV_VERSION_INT(57, 37, 100)
+# define SCRCPY_LAVF_HAS_NEW_ENCODING_DECODING_API
+#endif
+
+#if SDL_VERSION_ATLEAST(2, 0, 5)
+// <https://wiki.libsdl.org/SDL_HINT_MOUSE_FOCUS_CLICKTHROUGH>
+# define SCRCPY_SDL_HAS_HINT_MOUSE_FOCUS_CLICKTHROUGH
+// <https://wiki.libsdl.org/SDL_GetDisplayUsableBounds>
+# define SCRCPY_SDL_HAS_GET_DISPLAY_USABLE_BOUNDS
+// <https://wiki.libsdl.org/SDL_WindowFlags>
+# define SCRCPY_SDL_HAS_WINDOW_ALWAYS_ON_TOP
+#endif
+
+#if SDL_VERSION_ATLEAST(2, 0, 8)
+// <https://hg.libsdl.org/SDL/rev/dfde5d3f9781>
+# define SCRCPY_SDL_HAS_HINT_VIDEO_X11_NET_WM_BYPASS_COMPOSITOR
+#endif
+
+#endif

app/src/control_event.c

@@ -1,20 +1,21 @@
 #include "control_event.h"
 
-#include <SDL2/SDL_stdinc.h>
 #include <string.h>
 
 #include "buffer_util.h"
 #include "lock_util.h"
 #include "log.h"
 
-static void write_position(Uint8 *buf, const struct position *position) {
+static void
+write_position(uint8_t *buf, const struct position *position) {
     buffer_write32be(&buf[0], position->point.x);
     buffer_write32be(&buf[4], position->point.y);
     buffer_write16be(&buf[8], position->screen_size.width);
     buffer_write16be(&buf[10], position->screen_size.height);
 }
 
-int control_event_serialize(const struct control_event *event, unsigned char *buf) {
+int
+control_event_serialize(const struct control_event *event, unsigned char *buf) {
     buf[0] = event->type;
     switch (event->type) {
         case CONTROL_EVENT_TYPE_KEYCODE:
@@ -23,13 +24,13 @@ int control_event_serialize(const struct control_event *event, unsigned char *bu
             buffer_write32be(&buf[6], event->keycode_event.metastate);
             return 10;
         case CONTROL_EVENT_TYPE_TEXT: {
-            // write length (1 byte) + date (non nul-terminated)
+            // write length (2 bytes) + string (non nul-terminated)
             size_t len = strlen(event->text_event.text);
             if (len > TEXT_MAX_LENGTH) {
                 // injecting a text takes time, so limit the text length
                 len = TEXT_MAX_LENGTH;
             }
-            buffer_write16be(&buf[1], (Uint16) len);
+            buffer_write16be(&buf[1], (uint16_t) len);
             memcpy(&buf[3], event->text_event.text, len);
             return 3 + len;
         }
@@ -40,8 +41,8 @@ int control_event_serialize(const struct control_event *event, unsigned char *bu
             return 18;
         case CONTROL_EVENT_TYPE_SCROLL:
             write_position(&buf[1], &event->scroll_event.position);
-            buffer_write32be(&buf[13], (Uint32) event->scroll_event.hscroll);
+            buffer_write32be(&buf[13], (uint32_t) event->scroll_event.hscroll);
-            buffer_write32be(&buf[17], (Uint32) event->scroll_event.vscroll);
+            buffer_write32be(&buf[17], (uint32_t) event->scroll_event.vscroll);
             return 21;
         case CONTROL_EVENT_TYPE_COMMAND:
             buf[1] = event->command_event.action;
@@ -52,28 +53,33 @@ int control_event_serialize(const struct control_event *event, unsigned char *bu
     }
 }
 
-void control_event_destroy(struct control_event *event) {
+void
+control_event_destroy(struct control_event *event) {
     if (event->type == CONTROL_EVENT_TYPE_TEXT) {
         SDL_free(event->text_event.text);
     }
 }
 
-SDL_bool control_event_queue_is_empty(const struct control_event_queue *queue) {
+bool
+control_event_queue_is_empty(const struct control_event_queue *queue) {
     return queue->head == queue->tail;
 }
 
-SDL_bool control_event_queue_is_full(const struct control_event_queue *queue) {
+bool
+control_event_queue_is_full(const struct control_event_queue *queue) {
     return (queue->head + 1) % CONTROL_EVENT_QUEUE_SIZE == queue->tail;
 }
 
-SDL_bool control_event_queue_init(struct control_event_queue *queue) {
+bool
+control_event_queue_init(struct control_event_queue *queue) {
     queue->head = 0;
     queue->tail = 0;
     // the current implementation may not fail
-    return SDL_TRUE;
+    return true;
 }
 
-void control_event_queue_destroy(struct control_event_queue *queue) {
+void
+control_event_queue_destroy(struct control_event_queue *queue) {
     int i = queue->tail;
     while (i != queue->head) {
         control_event_destroy(&queue->data[i]);
@@ -81,20 +87,24 @@ void control_event_queue_destroy(struct control_event_queue *queue) {
     }
 }
 
-SDL_bool control_event_queue_push(struct control_event_queue *queue, const struct control_event *event) {
+bool
+control_event_queue_push(struct control_event_queue *queue,
+                         const struct control_event *event) {
     if (control_event_queue_is_full(queue)) {
-        return SDL_FALSE;
+        return false;
     }
     queue->data[queue->head] = *event;
     queue->head = (queue->head + 1) % CONTROL_EVENT_QUEUE_SIZE;
-    return SDL_TRUE;
+    return true;
 }
 
-SDL_bool control_event_queue_take(struct control_event_queue *queue, struct control_event *event) {
+bool
+control_event_queue_take(struct control_event_queue *queue,
+                         struct control_event *event) {
     if (control_event_queue_is_empty(queue)) {
-        return SDL_FALSE;
+        return false;
     }
     *event = queue->data[queue->tail];
     queue->tail = (queue->tail + 1) % CONTROL_EVENT_QUEUE_SIZE;
-    return SDL_TRUE;
+    return true;
 }

app/src/control_event.h

@@ -1,8 +1,9 @@
 #ifndef CONTROLEVENT_H
 #define CONTROLEVENT_H
 
+#include <stdbool.h>
+#include <stdint.h>
 #include <SDL2/SDL_mutex.h>
-#include <SDL2/SDL_stdinc.h>
 
 #include "android/input.h"
 #include "android/keycodes.h"
@@ -20,7 +21,11 @@ enum control_event_type {
     CONTROL_EVENT_TYPE_COMMAND,
 };
 
-#define CONTROL_EVENT_COMMAND_BACK_OR_SCREEN_ON 0
+enum control_event_command {
+    CONTROL_EVENT_COMMAND_BACK_OR_SCREEN_ON,
+    CONTROL_EVENT_COMMAND_EXPAND_NOTIFICATION_PANEL,
+    CONTROL_EVENT_COMMAND_COLLAPSE_NOTIFICATION_PANEL,
+};
 
 struct control_event {
     enum control_event_type type;
@@ -40,11 +45,11 @@ struct control_event {
         } mouse_event;
         struct {
             struct position position;
-            Sint32 hscroll;
+            int32_t hscroll;
-            Sint32 vscroll;
+            int32_t vscroll;
         } scroll_event;
         struct {
-            int action;
+            enum control_event_command action;
         } command_event;
     };
 };
@@ -56,18 +61,31 @@ struct control_event_queue {
 };
 
 // buf size must be at least SERIALIZED_EVENT_MAX_SIZE
-int control_event_serialize(const struct control_event *event, unsigned char *buf);
+int
+control_event_serialize(const struct control_event *event, unsigned char *buf);
 
-SDL_bool control_event_queue_init(struct control_event_queue *queue);
+bool
-void control_event_queue_destroy(struct control_event_queue *queue);
+control_event_queue_init(struct control_event_queue *queue);
 
-SDL_bool control_event_queue_is_empty(const struct control_event_queue *queue);
+void
-SDL_bool control_event_queue_is_full(const struct control_event_queue *queue);
+control_event_queue_destroy(struct control_event_queue *queue);
+
+bool
+control_event_queue_is_empty(const struct control_event_queue *queue);
+
+bool
+control_event_queue_is_full(const struct control_event_queue *queue);
 
 // event is copied, the queue does not use the event after the function returns
-SDL_bool control_event_queue_push(struct control_event_queue *queue, const struct control_event *event);
+bool
-SDL_bool control_event_queue_take(struct control_event_queue *queue, struct control_event *event);
+control_event_queue_push(struct control_event_queue *queue,
+                         const struct control_event *event);
 
-void control_event_destroy(struct control_event *event);
+bool
+control_event_queue_take(struct control_event_queue *queue,
+                         struct control_event *event);
+
+void
+control_event_destroy(struct control_event *event);
 
 #endif

app/src/controller.c

@@ -1,40 +1,45 @@
 #include "controller.h"
 
 #include <SDL2/SDL_assert.h>
+
 #include "config.h"
 #include "lock_util.h"
 #include "log.h"
 
-SDL_bool controller_init(struct controller *controller, socket_t video_socket) {
+bool
+controller_init(struct controller *controller, socket_t video_socket) {
     if (!control_event_queue_init(&controller->queue)) {
-        return SDL_FALSE;
+        return false;
     }
 
     if (!(controller->mutex = SDL_CreateMutex())) {
-        return SDL_FALSE;
+        return false;
     }
 
     if (!(controller->event_cond = SDL_CreateCond())) {
         SDL_DestroyMutex(controller->mutex);
-        return SDL_FALSE;
+        return false;
     }
 
     controller->video_socket = video_socket;
-    controller->stopped = SDL_FALSE;
+    controller->stopped = false;
 
-    return SDL_TRUE;
+    return true;
 }
 
-void controller_destroy(struct controller *controller) {
+void
+controller_destroy(struct controller *controller) {
     SDL_DestroyCond(controller->event_cond);
     SDL_DestroyMutex(controller->mutex);
     control_event_queue_destroy(&controller->queue);
 }
 
-SDL_bool controller_push_event(struct controller *controller, const struct control_event *event) {
+bool
-    SDL_bool res;
+controller_push_event(struct controller *controller,
+                      const struct control_event *event) {
+    bool res;
     mutex_lock(controller->mutex);
-    SDL_bool was_empty = control_event_queue_is_empty(&controller->queue);
+    bool was_empty = control_event_queue_is_empty(&controller->queue);
     res = control_event_queue_push(&controller->queue, event);
     if (was_empty) {
         cond_signal(controller->event_cond);
@@ -43,22 +48,26 @@ SDL_bool controller_push_event(struct controller *controller, const struct contr
     return res;
 }
 
-static SDL_bool process_event(struct controller *controller, const struct control_event *event) {
+static bool
+process_event(struct controller *controller,
+              const struct control_event *event) {
     unsigned char serialized_event[SERIALIZED_EVENT_MAX_SIZE];
     int length = control_event_serialize(event, serialized_event);
     if (!length) {
-        return SDL_FALSE;
+        return false;
     }
     int w = net_send_all(controller->video_socket, serialized_event, length);
     return w == length;
 }
 
-static int run_controller(void *data) {
+static int
+run_controller(void *data) {
     struct controller *controller = data;
 
     for (;;) {
         mutex_lock(controller->mutex);
-        while (!controller->stopped && control_event_queue_is_empty(&controller->queue)) {
+        while (!controller->stopped
+                && control_event_queue_is_empty(&controller->queue)) {
             cond_wait(controller->event_cond, controller->mutex);
         }
         if (controller->stopped) {
@@ -67,11 +76,12 @@ static int run_controller(void *data) {
             break;
         }
         struct control_event event;
-        SDL_bool non_empty = control_event_queue_take(&controller->queue, &event);
+        bool non_empty = control_event_queue_take(&controller->queue,
+                                                      &event);
         SDL_assert(non_empty);
         mutex_unlock(controller->mutex);
 
-        SDL_bool ok = process_event(controller, &event);
+        bool ok = process_event(controller, &event);
         control_event_destroy(&event);
         if (!ok) {
             LOGD("Cannot write event to socket");
@@ -81,25 +91,29 @@ static int run_controller(void *data) {
     return 0;
 }
 
-SDL_bool controller_start(struct controller *controller) {
+bool
+controller_start(struct controller *controller) {
     LOGD("Starting controller thread");
 
-    controller->thread = SDL_CreateThread(run_controller, "controller", controller);
+    controller->thread = SDL_CreateThread(run_controller, "controller",
+                                          controller);
     if (!controller->thread) {
         LOGC("Could not start controller thread");
-        return SDL_FALSE;
+        return false;
     }
 
-    return SDL_TRUE;
+    return true;
 }
 
-void controller_stop(struct controller *controller) {
+void
+controller_stop(struct controller *controller) {
     mutex_lock(controller->mutex);
-    controller->stopped = SDL_TRUE;
+    controller->stopped = true;
     cond_signal(controller->event_cond);
     mutex_unlock(controller->mutex);
 }
 
-void controller_join(struct controller *controller) {
+void
+controller_join(struct controller *controller) {
     SDL_WaitThread(controller->thread, NULL);
 }

app/src/controller.h

@@ -3,8 +3,8 @@
 
 #include "control_event.h"
 
+#include <stdbool.h>
 #include <SDL2/SDL_mutex.h>
-#include <SDL2/SDL_stdinc.h>
 #include <SDL2/SDL_thread.h>
 
 #include "net.h"
@@ -14,18 +14,28 @@ struct controller {
     SDL_Thread *thread;
     SDL_mutex *mutex;
     SDL_cond *event_cond;
-    SDL_bool stopped;
+    bool stopped;
     struct control_event_queue queue;
 };
 
-SDL_bool controller_init(struct controller *controller, socket_t video_socket);
+bool
-void controller_destroy(struct controller *controller);
+controller_init(struct controller *controller, socket_t video_socket);
 
-SDL_bool controller_start(struct controller *controller);
+void
-void controller_stop(struct controller *controller);
+controller_destroy(struct controller *controller);
-void controller_join(struct controller *controller);
+
+bool
+controller_start(struct controller *controller);
+
+void
+controller_stop(struct controller *controller);
+
+void
+controller_join(struct controller *controller);
 
 // expose simple API to hide control_event_queue
-SDL_bool controller_push_event(struct controller *controller, const struct control_event *event);
+bool
+controller_push_event(struct controller *controller,
+                      const struct control_event *event);
 
 #endif

app/src/convert.c

@@ -1,9 +1,10 @@
 #include "convert.h"
 
-#define MAP(FROM, TO) case FROM: *to = TO; return SDL_TRUE
+#define MAP(FROM, TO) case FROM: *to = TO; return true
-#define FAIL default: return SDL_FALSE
+#define FAIL default: return false
 
-static SDL_bool convert_keycode_action(SDL_EventType from, enum android_keyevent_action *to) {
+static bool
+convert_keycode_action(SDL_EventType from, enum android_keyevent_action *to) {
     switch (from) {
         MAP(SDL_KEYDOWN, AKEY_EVENT_ACTION_DOWN);
         MAP(SDL_KEYUP,   AKEY_EVENT_ACTION_UP);
@@ -11,7 +12,8 @@ static SDL_bool convert_keycode_action(SDL_EventType from, enum android_keyevent
     }
 }
 
-static enum android_metastate autocomplete_metastate(enum android_metastate metastate) {
+static enum android_metastate
+autocomplete_metastate(enum android_metastate metastate) {
     // fill dependant flags
     if (metastate & (AMETA_SHIFT_LEFT_ON | AMETA_SHIFT_RIGHT_ON)) {
         metastate |= AMETA_SHIFT_ON;
@@ -30,7 +32,8 @@ static enum android_metastate autocomplete_metastate(enum android_metastate meta
 }
 
 
-static enum android_metastate convert_meta_state(SDL_Keymod mod) {
+static enum android_metastate
+convert_meta_state(SDL_Keymod mod) {
     enum android_metastate metastate = 0;
     if (mod & KMOD_LSHIFT) {
         metastate |= AMETA_SHIFT_LEFT_ON;
@@ -70,16 +73,17 @@ static enum android_metastate convert_meta_state(SDL_Keymod mod) {
     return autocomplete_metastate(metastate);
 }
 
-static SDL_bool convert_keycode(SDL_Keycode from, enum android_keycode *to, Uint16 mod) {
+static bool
+convert_keycode(SDL_Keycode from, enum android_keycode *to, uint16_t mod) {
     switch (from) {
         MAP(SDLK_RETURN,       AKEYCODE_ENTER);
         MAP(SDLK_KP_ENTER,     AKEYCODE_NUMPAD_ENTER);
         MAP(SDLK_ESCAPE,       AKEYCODE_ESCAPE);
         MAP(SDLK_BACKSPACE,    AKEYCODE_DEL);
         MAP(SDLK_TAB,          AKEYCODE_TAB);
-        MAP(SDLK_HOME,         AKEYCODE_HOME);
         MAP(SDLK_PAGEUP,       AKEYCODE_PAGE_UP);
         MAP(SDLK_DELETE,       AKEYCODE_FORWARD_DEL);
+        MAP(SDLK_HOME,         AKEYCODE_MOVE_HOME);
         MAP(SDLK_END,          AKEYCODE_MOVE_END);
         MAP(SDLK_PAGEDOWN,     AKEYCODE_PAGE_DOWN);
         MAP(SDLK_RIGHT,        AKEYCODE_DPAD_RIGHT);
@@ -88,7 +92,7 @@ static SDL_bool convert_keycode(SDL_Keycode from, enum android_keycode *to, Uint
         MAP(SDLK_UP,           AKEYCODE_DPAD_UP);
     }
     if (mod & (KMOD_LALT | KMOD_RALT | KMOD_LGUI | KMOD_RGUI)) {
-        return SDL_FALSE;
+        return false;
     }
     // if ALT and META are not pressed, also handle letters and space
     switch (from) {
@@ -123,7 +127,8 @@ static SDL_bool convert_keycode(SDL_Keycode from, enum android_keycode *to, Uint
     }
 }
 
-static SDL_bool convert_mouse_action(SDL_EventType from, enum android_motionevent_action *to) {
+static bool
+convert_mouse_action(SDL_EventType from, enum android_motionevent_action *to) {
     switch (from) {
         MAP(SDL_MOUSEBUTTONDOWN, AMOTION_EVENT_ACTION_DOWN);
         MAP(SDL_MOUSEBUTTONUP,   AMOTION_EVENT_ACTION_UP);
@@ -131,7 +136,8 @@ static SDL_bool convert_mouse_action(SDL_EventType from, enum android_motioneven
     }
 }
 
-static enum android_motionevent_buttons convert_mouse_buttons(Uint32 state) {
+static enum android_motionevent_buttons
+convert_mouse_buttons(uint32_t state) {
     enum android_motionevent_buttons buttons = 0;
     if (state & SDL_BUTTON_LMASK) {
         buttons |= AMOTION_EVENT_BUTTON_PRIMARY;
@@ -151,31 +157,33 @@ static enum android_motionevent_buttons convert_mouse_buttons(Uint32 state) {
     return buttons;
 }
 
-SDL_bool input_key_from_sdl_to_android(const SDL_KeyboardEvent *from,
+bool
-                                       struct control_event *to) {
+input_key_from_sdl_to_android(const SDL_KeyboardEvent *from,
+                              struct control_event *to) {
     to->type = CONTROL_EVENT_TYPE_KEYCODE;
 
     if (!convert_keycode_action(from->type, &to->keycode_event.action)) {
-        return SDL_FALSE;
+        return false;
     }
 
-    Uint16 mod = from->keysym.mod;
+    uint16_t mod = from->keysym.mod;
     if (!convert_keycode(from->keysym.sym, &to->keycode_event.keycode, mod)) {
-        return SDL_FALSE;
+        return false;
     }
 
     to->keycode_event.metastate = convert_meta_state(mod);
 
-    return SDL_TRUE;
+    return true;
 }
 
-SDL_bool mouse_button_from_sdl_to_android(const SDL_MouseButtonEvent *from,
+bool
-                                          struct size screen_size,
+mouse_button_from_sdl_to_android(const SDL_MouseButtonEvent *from,
-                                          struct control_event *to) {
+                                 struct size screen_size,
+                                 struct control_event *to) {
     to->type = CONTROL_EVENT_TYPE_MOUSE;
 
     if (!convert_mouse_action(from->type, &to->mouse_event.action)) {
-        return SDL_FALSE;
+        return false;
     }
 
     to->mouse_event.buttons = convert_mouse_buttons(SDL_BUTTON(from->button));
@@ -183,12 +191,13 @@ SDL_bool mouse_button_from_sdl_to_android(const SDL_MouseButtonEvent *from,
     to->mouse_event.position.point.x = from->x;
     to->mouse_event.position.point.y = from->y;
 
-    return SDL_TRUE;
+    return true;
 }
 
-SDL_bool mouse_motion_from_sdl_to_android(const SDL_MouseMotionEvent *from,
+bool
-                                          struct size screen_size,
+mouse_motion_from_sdl_to_android(const SDL_MouseMotionEvent *from,
-                                          struct control_event *to) {
+                                 struct size screen_size,
+                                 struct control_event *to) {
     to->type = CONTROL_EVENT_TYPE_MOUSE;
     to->mouse_event.action = AMOTION_EVENT_ACTION_MOVE;
     to->mouse_event.buttons = convert_mouse_buttons(from->state);
@@ -196,12 +205,13 @@ SDL_bool mouse_motion_from_sdl_to_android(const SDL_MouseMotionEvent *from,
     to->mouse_event.position.point.x = from->x;
     to->mouse_event.position.point.y = from->y;
 
-    return SDL_TRUE;
+    return true;
 }
 
-SDL_bool mouse_wheel_from_sdl_to_android(const SDL_MouseWheelEvent *from,
+bool
-                                         struct position position,
+mouse_wheel_from_sdl_to_android(const SDL_MouseWheelEvent *from,
-                                         struct control_event *to) {
+                                struct position position,
+                                struct control_event *to) {
     to->type = CONTROL_EVENT_TYPE_SCROLL;
 
     to->scroll_event.position = position;
@@ -213,5 +223,5 @@ SDL_bool mouse_wheel_from_sdl_to_android(const SDL_MouseWheelEvent *from,
     to->scroll_event.hscroll = -mul * from->x;
     to->scroll_event.vscroll = mul * from->y;
 
-    return SDL_TRUE;
+    return true;
 }

app/src/convert.h

@@ -1,8 +1,9 @@
 #ifndef CONVERT_H
 #define CONVERT_H
 
-#include <SDL2/SDL_stdinc.h>
+#include <stdbool.h>
 #include <SDL2/SDL_events.h>
+
 #include "control_event.h"
 
 struct complete_mouse_motion_event {
@@ -15,21 +16,26 @@ struct complete_mouse_wheel_event {
     struct point position;
 };
 
-SDL_bool input_key_from_sdl_to_android(const SDL_KeyboardEvent *from,
+bool
-                                       struct control_event *to);
+input_key_from_sdl_to_android(const SDL_KeyboardEvent *from,
-SDL_bool mouse_button_from_sdl_to_android(const SDL_MouseButtonEvent *from,
+                              struct control_event *to);
-                                          struct size screen_size,
-                                          struct control_event *to);
 
-// the video size may be different from the real device size, so we need the size
+bool
-// to which the absolute position apply, to scale it accordingly
+mouse_button_from_sdl_to_android(const SDL_MouseButtonEvent *from,
-SDL_bool mouse_motion_from_sdl_to_android(const SDL_MouseMotionEvent *from,
+                                 struct size screen_size,
-                                          struct size screen_size,
+                                 struct control_event *to);
-                                          struct control_event *to);
+
+// the video size may be different from the real device size, so we need the
+// size to which the absolute position apply, to scale it accordingly
+bool
+mouse_motion_from_sdl_to_android(const SDL_MouseMotionEvent *from,
+                                 struct size screen_size,
+                                 struct control_event *to);
 
 // on Android, a scroll event requires the current mouse position
-SDL_bool mouse_wheel_from_sdl_to_android(const SDL_MouseWheelEvent *from,
+bool
-                                         struct position position,
+mouse_wheel_from_sdl_to_android(const SDL_MouseWheelEvent *from,
-                                         struct control_event *to);
+                                struct position position,
+                                struct control_event *to);
 
 #endif

app/src/decoder.c

@@ -8,133 +8,22 @@
 #include <SDL2/SDL_thread.h>
 #include <unistd.h>
 
+#include "compat.h"
 #include "config.h"
 #include "buffer_util.h"
 #include "events.h"
-#include "frames.h"
 #include "lock_util.h"
 #include "log.h"
 #include "recorder.h"
-
+#include "video_buffer.h"
-#define BUFSIZE 0x10000
-
-#define HEADER_SIZE 12
-#define NO_PTS UINT64_C(-1)
-
-static struct frame_meta *frame_meta_new(uint64_t pts) {
-    struct frame_meta *meta = malloc(sizeof(*meta));
-    if (!meta) {
-        return meta;
-    }
-    meta->pts = pts;
-    meta->next = NULL;
-    return meta;
-}
-
-static void frame_meta_delete(struct frame_meta *frame_meta) {
-    free(frame_meta);
-}
-
-static SDL_bool receiver_state_push_meta(struct receiver_state *state,
-                                         uint64_t pts) {
-    struct frame_meta *frame_meta = frame_meta_new(pts);
-    if (!frame_meta) {
-        return SDL_FALSE;
-    }
-
-    // append to the list
-    // (iterate to find the last item, in practice the list should be tiny)
-    struct frame_meta **p = &state->frame_meta_queue;
-    while (*p) {
-        p = &(*p)->next;
-    }
-    *p = frame_meta;
-    return SDL_TRUE;
-}
-
-static uint64_t receiver_state_take_meta(struct receiver_state *state) {
-    struct frame_meta *frame_meta = state->frame_meta_queue; // first item
-    SDL_assert(frame_meta); // must not be empty
-    uint64_t pts = frame_meta->pts;
-    state->frame_meta_queue = frame_meta->next; // remove the item
-    frame_meta_delete(frame_meta);
-    return pts;
-}
-
-static int read_packet_with_meta(void *opaque, uint8_t *buf, int buf_size) {
-    struct decoder *decoder = opaque;
-    struct receiver_state *state = &decoder->receiver_state;
-
-    // The video stream contains raw packets, without time information. When we
-    // record, we retrieve the timestamps separately, from a "meta" header
-    // added by the server before each raw packet.
-    //
-    // The "meta" header length is 12 bytes:
-    // [. . . . . . . .|. . . .]. . . . . . . . . . . . . . . ...
-    //  <-------------> <-----> <-----------------------------...
-    //        PTS        packet        raw packet
-    //                    size
-    //
-    // It is followed by <packet_size> bytes containing the packet/frame.
-
-    if (!state->remaining) {
-#define HEADER_SIZE 12
-        uint8_t header[HEADER_SIZE];
-        ssize_t r = net_recv_all(decoder->video_socket, header, HEADER_SIZE);
-        if (r == -1) {
-            return AVERROR(errno);
-        }
-        if (r == 0) {
-            return AVERROR_EOF;
-        }
-        // no partial read (net_recv_all())
-        SDL_assert_release(r == HEADER_SIZE);
-
-        uint64_t pts = buffer_read64be(header);
-        state->remaining = buffer_read32be(&header[8]);
-
-        if (pts != NO_PTS && !receiver_state_push_meta(state, pts)) {
-            LOGE("Could not store PTS for recording");
-            // we cannot save the PTS, the recording would be broken
-            return AVERROR(ENOMEM);
-        }
-    }
-
-    SDL_assert(state->remaining);
-
-    if (buf_size > state->remaining)
-        buf_size = state->remaining;
-
-    ssize_t r = net_recv(decoder->video_socket, buf, buf_size);
-    if (r == -1) {
-        return AVERROR(errno);
-    }
-    if (r == 0) {
-        return AVERROR_EOF;
-    }
-
-    SDL_assert(state->remaining >= r);
-    state->remaining -= r;
-
-    return r;
-}
-
-static int read_raw_packet(void *opaque, uint8_t *buf, int buf_size) {
-    struct decoder *decoder = opaque;
-    ssize_t r = net_recv(decoder->video_socket, buf, buf_size);
-    if (r == -1) {
-        return AVERROR(errno);
-    }
-    if (r == 0) {
-        return AVERROR_EOF;
-    }
-    return r;
-}
 
 // set the decoded frame as ready for rendering, and notify
-static void push_frame(struct decoder *decoder) {
+static void
-    SDL_bool previous_frame_consumed = frames_offer_decoded_frame(decoder->frames);
+push_frame(struct decoder *decoder) {
-    if (!previous_frame_consumed) {
+    bool previous_frame_skipped;
+    video_buffer_offer_decoded_frame(decoder->video_buffer,
+                                     &previous_frame_skipped);
+    if (previous_frame_skipped) {
         // the previous EVENT_NEW_FRAME will consume this frame
         return;
     }
@@ -144,180 +33,71 @@ static void push_frame(struct decoder *decoder) {
     SDL_PushEvent(&new_frame_event);
 }
 
-static void notify_stopped(void) {
+void
-    SDL_Event stop_event;
+decoder_init(struct decoder *decoder, struct video_buffer *vb) {
-    stop_event.type = EVENT_DECODER_STOPPED;
+    decoder->video_buffer = vb;
-    SDL_PushEvent(&stop_event);
 }
 
-static int run_decoder(void *data) {
+bool
-    struct decoder *decoder = data;
+decoder_open(struct decoder *decoder, const AVCodec *codec) {
-
+    decoder->codec_ctx = avcodec_alloc_context3(codec);
-    AVCodec *codec = avcodec_find_decoder(AV_CODEC_ID_H264);
+    if (!decoder->codec_ctx) {
-    if (!codec) {
-        LOGE("H.264 decoder not found");
-        goto run_end;
-    }
-
-    AVCodecContext *codec_ctx = avcodec_alloc_context3(codec);
-    if (!codec_ctx) {
         LOGC("Could not allocate decoder context");
-        goto run_end;
+        return false;
     }
 
-    if (avcodec_open2(codec_ctx, codec, NULL) < 0) {
+    if (avcodec_open2(decoder->codec_ctx, codec, NULL) < 0) {
-        LOGE("Could not open H.264 codec");
+        LOGE("Could not open codec");
-        goto run_finally_free_codec_ctx;
+        avcodec_free_context(&decoder->codec_ctx);
+        return false;
     }
 
-    AVFormatContext *format_ctx = avformat_alloc_context();
+    return true;
-    if (!format_ctx) {
+}
-        LOGC("Could not allocate format context");
-        goto run_finally_close_codec;
-    }
 
-    unsigned char *buffer = av_malloc(BUFSIZE);
+void
-    if (!buffer) {
+decoder_close(struct decoder *decoder) {
-        LOGC("Could not allocate buffer");
+    avcodec_close(decoder->codec_ctx);
-        goto run_finally_free_format_ctx;
+    avcodec_free_context(&decoder->codec_ctx);
-    }
+}
 
-    // initialize the receiver state
+bool
-    decoder->receiver_state.frame_meta_queue = NULL;
+decoder_push(struct decoder *decoder, const AVPacket *packet) {
-    decoder->receiver_state.remaining = 0;
-
-    // if recording is enabled, a "header" is sent between raw packets
-    int (*read_packet)(void *, uint8_t *, int) =
-            decoder->recorder ? read_packet_with_meta : read_raw_packet;
-    AVIOContext *avio_ctx = avio_alloc_context(buffer, BUFSIZE, 0, decoder,
-                                               read_packet, NULL, NULL);
-    if (!avio_ctx) {
-        LOGC("Could not allocate avio context");
-        // avformat_open_input takes ownership of 'buffer'
-        // so only free the buffer before avformat_open_input()
-        av_free(buffer);
-        goto run_finally_free_format_ctx;
-    }
-
-    format_ctx->pb = avio_ctx;
-
-    if (avformat_open_input(&format_ctx, NULL, NULL, NULL) < 0) {
-        LOGE("Could not open video stream");
-        goto run_finally_free_avio_ctx;
-    }
-
-    if (decoder->recorder &&
-            !recorder_open(decoder->recorder, codec)) {
-        LOGE("Could not open recorder");
-        goto run_finally_close_input;
-    }
-
-    AVPacket packet;
-    av_init_packet(&packet);
-    packet.data = NULL;
-    packet.size = 0;
-
-    while (!av_read_frame(format_ctx, &packet)) {
 // the new decoding/encoding API has been introduced by:
 // <http://git.videolan.org/?p=ffmpeg.git;a=commitdiff;h=7fc329e2dd6226dfecaa4a1d7adf353bf2773726>
-#if LIBAVCODEC_VERSION_INT >= AV_VERSION_INT(57, 37, 0)
+#ifdef SCRCPY_LAVF_HAS_NEW_ENCODING_DECODING_API
-        int ret;
+    int ret;
-        if ((ret = avcodec_send_packet(codec_ctx, &packet)) < 0) {
+    if ((ret = avcodec_send_packet(decoder->codec_ctx, packet)) < 0) {
-            LOGE("Could not send video packet: %d", ret);
+        LOGE("Could not send video packet: %d", ret);
-            goto run_quit;
+        return false;
-        }
+    }
-        ret = avcodec_receive_frame(codec_ctx, decoder->frames->decoding_frame);
+    ret = avcodec_receive_frame(decoder->codec_ctx,
-        if (!ret) {
+                                decoder->video_buffer->decoding_frame);
-            // a frame was received
+    if (!ret) {
-            push_frame(decoder);
+        // a frame was received
-        } else if (ret != AVERROR(EAGAIN)) {
+        push_frame(decoder);
-            LOGE("Could not receive video frame: %d", ret);
+    } else if (ret != AVERROR(EAGAIN)) {
-            av_packet_unref(&packet);
+        LOGE("Could not receive video frame: %d", ret);
-            goto run_quit;
+        return false;
-        }
+    }
 #else
-        while (packet.size > 0) {
+    int got_picture;
-            int got_picture;
+    int len = avcodec_decode_video2(decoder->codec_ctx,
-            int len = avcodec_decode_video2(codec_ctx, decoder->frames->decoding_frame, &got_picture, &packet);
+                                    decoder->video_buffer->decoding_frame,
-            if (len < 0) {
+                                    &got_picture,
-                LOGE("Could not decode video packet: %d", len);
+                                    packet);
-                av_packet_unref(&packet);
+    if (len < 0) {
-                goto run_quit;
+        LOGE("Could not decode video packet: %d", len);
-            }
+        return false;
-            if (got_picture) {
+    }
-                push_frame(decoder);
+    if (got_picture) {
-            }
+        push_frame(decoder);
-            packet.size -= len;
+    }
-            packet.data += len;
-        }
 #endif
-
+    return true;
-        if (decoder->recorder) {
-            // we retrieve the PTS in order they were received, so they will
-            // be assigned to the correct frame
-            uint64_t pts = receiver_state_take_meta(&decoder->receiver_state);
-            packet.pts = pts;
-            packet.dts = pts;
-
-            // no need to rescale with av_packet_rescale_ts(), the timestamps
-            // are in microseconds both in input and output
-            if (!recorder_write(decoder->recorder, &packet)) {
-                LOGE("Could not write frame to output file");
-                av_packet_unref(&packet);
-                goto run_quit;
-            }
-        }
-
-        av_packet_unref(&packet);
-
-        if (avio_ctx->eof_reached) {
-            break;
-        }
-    }
-
-    LOGD("End of frames");
-
-run_quit:
-    if (decoder->recorder) {
-        recorder_close(decoder->recorder);
-    }
-run_finally_close_input:
-    avformat_close_input(&format_ctx);
-run_finally_free_avio_ctx:
-    av_freep(&avio_ctx);
-run_finally_free_format_ctx:
-    avformat_free_context(format_ctx);
-run_finally_close_codec:
-    avcodec_close(codec_ctx);
-run_finally_free_codec_ctx:
-    avcodec_free_context(&codec_ctx);
-    notify_stopped();
-run_end:
-    return 0;
 }
 
-void decoder_init(struct decoder *decoder, struct frames *frames,
+void
-                  socket_t video_socket, struct recorder *recorder) {
+decoder_interrupt(struct decoder *decoder) {
-    decoder->frames = frames;
+    video_buffer_interrupt(decoder->video_buffer);
-    decoder->video_socket = video_socket;
-    decoder->recorder = recorder;
-}
-
-SDL_bool decoder_start(struct decoder *decoder) {
-    LOGD("Starting decoder thread");
-
-    decoder->thread = SDL_CreateThread(run_decoder, "video_decoder", decoder);
-    if (!decoder->thread) {
-        LOGC("Could not start decoder thread");
-        return SDL_FALSE;
-    }
-    return SDL_TRUE;
-}
-
-void decoder_stop(struct decoder *decoder) {
-    frames_stop(decoder->frames);
-}
-
-void decoder_join(struct decoder *decoder) {
-    SDL_WaitThread(decoder->thread, NULL);
 }

app/src/decoder.h

@@ -1,36 +1,29 @@
 #ifndef DECODER_H
 #define DECODER_H
 
-#include <SDL2/SDL_stdinc.h>
+#include <stdbool.h>
-#include <SDL2/SDL_thread.h>
+#include <libavformat/avformat.h>
 
-#include "common.h"
+struct video_buffer;
-#include "net.h"
-
-struct frames;
-
-struct frame_meta {
-    uint64_t pts;
-    struct frame_meta *next;
-};
 
 struct decoder {
-    struct frames *frames;
+    struct video_buffer *video_buffer;
-    socket_t video_socket;
+    AVCodecContext *codec_ctx;
-    SDL_Thread *thread;
-    SDL_mutex *mutex;
-    struct recorder *recorder;
-    struct receiver_state {
-        // meta (in order) for frames not consumed yet
-        struct frame_meta *frame_meta_queue;
-        size_t remaining; // remaining bytes to receive for the current frame
-    } receiver_state;
 };
 
-void decoder_init(struct decoder *decoder, struct frames *frames,
+void
-                  socket_t video_socket, struct recorder *recoder);
+decoder_init(struct decoder *decoder, struct video_buffer *vb);
-SDL_bool decoder_start(struct decoder *decoder);
+
-void decoder_stop(struct decoder *decoder);
+bool
-void decoder_join(struct decoder *decoder);
+decoder_open(struct decoder *decoder, const AVCodec *codec);
+
+void
+decoder_close(struct decoder *decoder);
+
+bool
+decoder_push(struct decoder *decoder, const AVPacket *packet);
+
+void
+decoder_interrupt(struct decoder *decoder);
 
 #endif

app/src/device.c

@@ -1,18 +1,22 @@
 #include "device.h"
 #include "log.h"
 
-SDL_bool device_read_info(socket_t device_socket, char *device_name, struct size *size) {
+bool
+device_read_info(socket_t device_socket, char *device_name, struct size *size) {
     unsigned char buf[DEVICE_NAME_FIELD_LENGTH + 4];
     int r = net_recv_all(device_socket, buf, sizeof(buf));
     if (r < DEVICE_NAME_FIELD_LENGTH + 4) {
         LOGE("Could not retrieve device information");
-        return SDL_FALSE;
+        return false;
     }
-    buf[DEVICE_NAME_FIELD_LENGTH - 1] = '\0'; // in case the client sends garbage
+    // in case the client sends garbage
-    // strcpy is safe here, since name contains at least DEVICE_NAME_FIELD_LENGTH bytes
+    buf[DEVICE_NAME_FIELD_LENGTH - 1] = '\0';
-    // and strlen(buf) < DEVICE_NAME_FIELD_LENGTH
+    // strcpy is safe here, since name contains at least
+    // DEVICE_NAME_FIELD_LENGTH bytes and strlen(buf) < DEVICE_NAME_FIELD_LENGTH
     strcpy(device_name, (char *) buf);
-    size->width = (buf[DEVICE_NAME_FIELD_LENGTH] << 8) | buf[DEVICE_NAME_FIELD_LENGTH + 1];
+    size->width = (buf[DEVICE_NAME_FIELD_LENGTH] << 8)
-    size->height = (buf[DEVICE_NAME_FIELD_LENGTH + 2] << 8) | buf[DEVICE_NAME_FIELD_LENGTH + 3];
+            | buf[DEVICE_NAME_FIELD_LENGTH + 1];
-    return SDL_TRUE;
+    size->height = (buf[DEVICE_NAME_FIELD_LENGTH + 2] << 8)
+            | buf[DEVICE_NAME_FIELD_LENGTH + 3];
+    return true;
 }

app/src/device.h

@@ -1,7 +1,7 @@
 #ifndef DEVICE_H
 #define DEVICE_H
 
-#include <SDL2/SDL_stdinc.h>
+#include <stdbool.h>
 
 #include "common.h"
 #include "net.h"
@@ -10,6 +10,7 @@
 #define DEVICE_SDCARD_PATH "/sdcard/"
 
 // name must be at least DEVICE_NAME_FIELD_LENGTH bytes
-SDL_bool device_read_info(socket_t device_socket, char *name, struct size *frame_size);
+bool
+device_read_info(socket_t device_socket, char *name, struct size *frame_size);
 
 #endif

app/src/events.h

@@ -1,3 +1,3 @@
 #define EVENT_NEW_SESSION SDL_USEREVENT
 #define EVENT_NEW_FRAME (SDL_USEREVENT + 1)
-#define EVENT_DECODER_STOPPED (SDL_USEREVENT + 2)
+#define EVENT_STREAM_STOPPED (SDL_USEREVENT + 2)

app/src/file_handler.c

@@ -10,10 +10,11 @@
 
 struct request {
     file_handler_action_t action;
-    const char *file;
+    char *file;
 };
 
-static struct request *request_new(file_handler_action_t action, const char *file) {
+static struct request *
+request_new(file_handler_action_t action, char *file) {
     struct request *req = SDL_malloc(sizeof(*req));
     if (!req) {
         return NULL;
@@ -23,29 +24,34 @@ static struct request *request_new(file_handler_action_t action, const char *fil
     return req;
 }
 
-static void request_free(struct request *req) {
+static void
+request_free(struct request *req) {
     if (!req) {
         return;
     }
-    SDL_free((void *) req->file);
+    SDL_free(req->file);
-    SDL_free((void *) req);
+    SDL_free(req);
 }
 
-static SDL_bool request_queue_is_empty(const struct request_queue *queue) {
+static bool
+request_queue_is_empty(const struct request_queue *queue) {
     return queue->head == queue->tail;
 }
 
-static SDL_bool request_queue_is_full(const struct request_queue *queue) {
+static bool
+request_queue_is_full(const struct request_queue *queue) {
     return (queue->head + 1) % REQUEST_QUEUE_SIZE == queue->tail;
 }
 
-static SDL_bool request_queue_init(struct request_queue *queue) {
+static bool
+request_queue_init(struct request_queue *queue) {
     queue->head = 0;
     queue->tail = 0;
-    return SDL_TRUE;
+    return true;
 }
 
-static void request_queue_destroy(struct request_queue *queue) {
+static void
+request_queue_destroy(struct request_queue *queue) {
     int i = queue->tail;
     while (i != queue->head) {
         request_free(queue->reqs[i]);
@@ -53,38 +59,41 @@ static void request_queue_destroy(struct request_queue *queue) {
     }
 }
 
-static SDL_bool request_queue_push(struct request_queue *queue, struct request *req) {
+static bool
+request_queue_push(struct request_queue *queue, struct request *req) {
     if (request_queue_is_full(queue)) {
-        return SDL_FALSE;
+        return false;
     }
     queue->reqs[queue->head] = req;
     queue->head = (queue->head + 1) % REQUEST_QUEUE_SIZE;
-    return SDL_TRUE;
+    return true;
 }
 
-static SDL_bool request_queue_take(struct request_queue *queue, struct request **req) {
+static bool
+request_queue_take(struct request_queue *queue, struct request **req) {
     if (request_queue_is_empty(queue)) {
-        return SDL_FALSE;
+        return false;
     }
     // transfer ownership
     *req = queue->reqs[queue->tail];
     queue->tail = (queue->tail + 1) % REQUEST_QUEUE_SIZE;
-    return SDL_TRUE;
+    return true;
 }
 
-SDL_bool file_handler_init(struct file_handler *file_handler, const char *serial) {
+bool
+file_handler_init(struct file_handler *file_handler, const char *serial) {
 
     if (!request_queue_init(&file_handler->queue)) {
-        return SDL_FALSE;
+        return false;
     }
 
     if (!(file_handler->mutex = SDL_CreateMutex())) {
-        return SDL_FALSE;
+        return false;
     }
 
     if (!(file_handler->event_cond = SDL_CreateCond())) {
         SDL_DestroyMutex(file_handler->mutex);
-        return SDL_FALSE;
+        return false;
     }
 
     if (serial) {
@@ -92,58 +101,63 @@ SDL_bool file_handler_init(struct file_handler *file_handler, const char *serial
         if (!file_handler->serial) {
             LOGW("Cannot strdup serial");
             SDL_DestroyMutex(file_handler->mutex);
-            return SDL_FALSE;
+            return false;
         }
     } else {
         file_handler->serial = NULL;
     }
 
     // lazy initialization
-    file_handler->initialized = SDL_FALSE;
+    file_handler->initialized = false;
 
-    file_handler->stopped = SDL_FALSE;
+    file_handler->stopped = false;
     file_handler->current_process = PROCESS_NONE;
 
-    return SDL_TRUE;
+    return true;
 }
 
-void file_handler_destroy(struct file_handler *file_handler) {
+void
+file_handler_destroy(struct file_handler *file_handler) {
     SDL_DestroyCond(file_handler->event_cond);
     SDL_DestroyMutex(file_handler->mutex);
     request_queue_destroy(&file_handler->queue);
-    SDL_free((void *) file_handler->serial);
+    SDL_free(file_handler->serial);
 }
 
-static process_t install_apk(const char *serial, const char *file) {
+static process_t
+install_apk(const char *serial, const char *file) {
     return adb_install(serial, file);
 }
 
-static process_t push_file(const char *serial, const char *file) {
+static process_t
+push_file(const char *serial, const char *file) {
     return adb_push(serial, file, DEVICE_SDCARD_PATH);
 }
 
-SDL_bool file_handler_request(struct file_handler *file_handler,
+bool
-                              file_handler_action_t action,
+file_handler_request(struct file_handler *file_handler,
-                              const char *file) {
+                     file_handler_action_t action,
-    SDL_bool res;
+                     char *file) {
+    bool res;
 
     // start file_handler if it's used for the first time
     if (!file_handler->initialized) {
         if (!file_handler_start(file_handler)) {
-            return SDL_FALSE;
+            return false;
         }
-        file_handler->initialized = SDL_TRUE;
+        file_handler->initialized = true;
     }
 
-    LOGI("Request to %s %s", action == ACTION_INSTALL_APK ? "install" : "push", file);
+    LOGI("Request to %s %s", action == ACTION_INSTALL_APK ? "install" : "push",
+                             file);
     struct request *req = request_new(action, file);
     if (!req) {
         LOGE("Could not create request");
-        return SDL_FALSE;
+        return false;
     }
 
     mutex_lock(file_handler->mutex);
-    SDL_bool was_empty = request_queue_is_empty(&file_handler->queue);
+    bool was_empty = request_queue_is_empty(&file_handler->queue);
     res = request_queue_push(&file_handler->queue, req);
     if (was_empty) {
         cond_signal(file_handler->event_cond);
@@ -152,13 +166,15 @@ SDL_bool file_handler_request(struct file_handler *file_handler,
     return res;
 }
 
-static int run_file_handler(void *data) {
+static int
+run_file_handler(void *data) {
     struct file_handler *file_handler = data;
 
     for (;;) {
         mutex_lock(file_handler->mutex);
         file_handler->current_process = PROCESS_NONE;
-        while (!file_handler->stopped && request_queue_is_empty(&file_handler->queue)) {
+        while (!file_handler->stopped
+                && request_queue_is_empty(&file_handler->queue)) {
             cond_wait(file_handler->event_cond, file_handler->mutex);
         }
         if (file_handler->stopped) {
@@ -167,7 +183,7 @@ static int run_file_handler(void *data) {
             break;
         }
         struct request *req;
-        SDL_bool non_empty = request_queue_take(&file_handler->queue, &req);
+        bool non_empty = request_queue_take(&file_handler->queue, &req);
         SDL_assert(non_empty);
 
         process_t process;
@@ -200,21 +216,24 @@ static int run_file_handler(void *data) {
     return 0;
 }
 
-SDL_bool file_handler_start(struct file_handler *file_handler) {
+bool
+file_handler_start(struct file_handler *file_handler) {
     LOGD("Starting file_handler thread");
 
-    file_handler->thread = SDL_CreateThread(run_file_handler, "file_handler", file_handler);
+    file_handler->thread = SDL_CreateThread(run_file_handler, "file_handler",
+                                            file_handler);
     if (!file_handler->thread) {
         LOGC("Could not start file_handler thread");
-        return SDL_FALSE;
+        return false;
     }
 
-    return SDL_TRUE;
+    return true;
 }
 
-void file_handler_stop(struct file_handler *file_handler) {
+void
+file_handler_stop(struct file_handler *file_handler) {
     mutex_lock(file_handler->mutex);
-    file_handler->stopped = SDL_TRUE;
+    file_handler->stopped = true;
     cond_signal(file_handler->event_cond);
     if (file_handler->current_process != PROCESS_NONE) {
         if (!cmd_terminate(file_handler->current_process)) {
@@ -226,6 +245,7 @@ void file_handler_stop(struct file_handler *file_handler) {
     mutex_unlock(file_handler->mutex);
 }
 
-void file_handler_join(struct file_handler *file_handler) {
+void
+file_handler_join(struct file_handler *file_handler) {
     SDL_WaitThread(file_handler->thread, NULL);
 }

app/src/file_handler.h

@@ -1,9 +1,10 @@
 #ifndef FILE_HANDLER_H
 #define FILE_HANDLER_H
 
+#include <stdbool.h>
 #include <SDL2/SDL_mutex.h>
-#include <SDL2/SDL_stdinc.h>
 #include <SDL2/SDL_thread.h>
+
 #include "command.h"
 
 #define REQUEST_QUEUE_SIZE 16
@@ -20,25 +21,35 @@ struct request_queue {
 };
 
 struct file_handler {
-    const char *serial;
+    char *serial;
     SDL_Thread *thread;
     SDL_mutex *mutex;
     SDL_cond *event_cond;
-    SDL_bool stopped;
+    bool stopped;
-    SDL_bool initialized;
+    bool initialized;
     process_t current_process;
     struct request_queue queue;
 };
 
-SDL_bool file_handler_init(struct file_handler *file_handler, const char *serial);
+bool
-void file_handler_destroy(struct file_handler *file_handler);
+file_handler_init(struct file_handler *file_handler, const char *serial);
 
-SDL_bool file_handler_start(struct file_handler *file_handler);
+void
-void file_handler_stop(struct file_handler *file_handler);
+file_handler_destroy(struct file_handler *file_handler);
-void file_handler_join(struct file_handler *file_handler);
 
-SDL_bool file_handler_request(struct file_handler *file_handler,
+bool
-                              file_handler_action_t action,
+file_handler_start(struct file_handler *file_handler);
-                              const char *file);
+
+void
+file_handler_stop(struct file_handler *file_handler);
+
+void
+file_handler_join(struct file_handler *file_handler);
+
+// take ownership of file, and will SDL_free() it
+bool
+file_handler_request(struct file_handler *file_handler,
+                     file_handler_action_t action,
+                     char *file);
 
 #endif

app/src/fps_counter.c

@@ -4,14 +4,16 @@
 
 #include "log.h"
 
-void fps_counter_init(struct fps_counter *counter) {
+void
-    counter->started = SDL_FALSE;
+fps_counter_init(struct fps_counter *counter) {
+    counter->started = false;
     // no need to initialize the other fields, they are meaningful only when
     // started is true
 }
 
-void fps_counter_start(struct fps_counter *counter) {
+void
-    counter->started = SDL_TRUE;
+fps_counter_start(struct fps_counter *counter) {
+    counter->started = true;
     counter->slice_start = SDL_GetTicks();
     counter->nr_rendered = 0;
 #ifdef SKIP_FRAMES
@@ -19,14 +21,17 @@ void fps_counter_start(struct fps_counter *counter) {
 #endif
 }
 
-void fps_counter_stop(struct fps_counter *counter) {
+void
-    counter->started = SDL_FALSE;
+fps_counter_stop(struct fps_counter *counter) {
+    counter->started = false;
 }
 
-static void display_fps(struct fps_counter *counter) {
+static void
+display_fps(struct fps_counter *counter) {
 #ifdef SKIP_FRAMES
     if (counter->nr_skipped) {
-        LOGI("%d fps (+%d frames skipped)", counter->nr_rendered, counter->nr_skipped);
+        LOGI("%d fps (+%d frames skipped)", counter->nr_rendered,
+                                            counter->nr_skipped);
     } else {
 #endif
     LOGI("%d fps", counter->nr_rendered);
@@ -35,12 +40,13 @@ static void display_fps(struct fps_counter *counter) {
 #endif
 }
 
-static void check_expired(struct fps_counter *counter) {
+static void
-    Uint32 now = SDL_GetTicks();
+check_expired(struct fps_counter *counter) {
+    uint32_t now = SDL_GetTicks();
     if (now - counter->slice_start >= 1000) {
         display_fps(counter);
         // add a multiple of one second
-        Uint32 elapsed_slices = (now - counter->slice_start) / 1000;
+        uint32_t elapsed_slices = (now - counter->slice_start) / 1000;
         counter->slice_start += 1000 * elapsed_slices;
         counter->nr_rendered = 0;
 #ifdef SKIP_FRAMES
@@ -49,13 +55,15 @@ static void check_expired(struct fps_counter *counter) {
     }
 }
 
-void fps_counter_add_rendered_frame(struct fps_counter *counter) {
+void
+fps_counter_add_rendered_frame(struct fps_counter *counter) {
     check_expired(counter);
     ++counter->nr_rendered;
 }
 
 #ifdef SKIP_FRAMES
-void fps_counter_add_skipped_frame(struct fps_counter *counter) {
+void
+fps_counter_add_skipped_frame(struct fps_counter *counter) {
     check_expired(counter);
     ++counter->nr_skipped;
 }

app/src/fps_counter.h

@@ -1,26 +1,35 @@
 #ifndef FPSCOUNTER_H
 #define FPSCOUNTER_H
 
-#include <SDL2/SDL_stdinc.h>
+#include <stdbool.h>
+#include <stdint.h>
 
 #include "config.h"
 
 struct fps_counter {
-    SDL_bool started;
+    bool started;
-    Uint32 slice_start; // initialized by SDL_GetTicks()
+    uint32_t slice_start; // initialized by SDL_GetTicks()
     int nr_rendered;
 #ifdef SKIP_FRAMES
     int nr_skipped;
 #endif
 };
 
-void fps_counter_init(struct fps_counter *counter);
+void
-void fps_counter_start(struct fps_counter *counter);
+fps_counter_init(struct fps_counter *counter);
-void fps_counter_stop(struct fps_counter *counter);
+
+void
+fps_counter_start(struct fps_counter *counter);
+
+void
+fps_counter_stop(struct fps_counter *counter);
+
+void
+fps_counter_add_rendered_frame(struct fps_counter *counter);
 
-void fps_counter_add_rendered_frame(struct fps_counter *counter);
 #ifdef SKIP_FRAMES
-void fps_counter_add_skipped_frame(struct fps_counter *counter);
+void
+fps_counter_add_skipped_frame(struct fps_counter *counter);
 #endif
 
 #endif

app/src/frames.c

@@ -1,110 +0,0 @@
-#include "frames.h"
-
-#include <SDL2/SDL_assert.h>
-#include <SDL2/SDL_mutex.h>
-#include <libavutil/avutil.h>
-#include <libavformat/avformat.h>
-
-#include "config.h"
-#include "lock_util.h"
-#include "log.h"
-
-SDL_bool frames_init(struct frames *frames) {
-    if (!(frames->decoding_frame = av_frame_alloc())) {
-        goto error_0;
-    }
-
-    if (!(frames->rendering_frame = av_frame_alloc())) {
-        goto error_1;
-    }
-
-    if (!(frames->mutex = SDL_CreateMutex())) {
-        goto error_2;
-    }
-
-#ifndef SKIP_FRAMES
-    if (!(frames->rendering_frame_consumed_cond = SDL_CreateCond())) {
-        SDL_DestroyMutex(frames->mutex);
-        goto error_2;
-    }
-    frames->stopped = SDL_FALSE;
-#endif
-
-    // there is initially no rendering frame, so consider it has already been
-    // consumed
-    frames->rendering_frame_consumed = SDL_TRUE;
-    fps_counter_init(&frames->fps_counter);
-
-    return SDL_TRUE;
-
-error_2:
-    av_frame_free(&frames->rendering_frame);
-error_1:
-    av_frame_free(&frames->decoding_frame);
-error_0:
-    return SDL_FALSE;
-}
-
-void frames_destroy(struct frames *frames) {
-#ifndef SKIP_FRAMES
-    SDL_DestroyCond(frames->rendering_frame_consumed_cond);
-#endif
-    SDL_DestroyMutex(frames->mutex);
-    av_frame_free(&frames->rendering_frame);
-    av_frame_free(&frames->decoding_frame);
-}
-
-static void frames_swap(struct frames *frames) {
-    AVFrame *tmp = frames->decoding_frame;
-    frames->decoding_frame = frames->rendering_frame;
-    frames->rendering_frame = tmp;
-}
-
-SDL_bool frames_offer_decoded_frame(struct frames *frames) {
-    mutex_lock(frames->mutex);
-#ifndef SKIP_FRAMES
-    // if SKIP_FRAMES is disabled, then the decoder must wait for the current
-    // frame to be consumed
-    while (!frames->rendering_frame_consumed && !frames->stopped) {
-        cond_wait(frames->rendering_frame_consumed_cond, frames->mutex);
-    }
-#else
-    if (frames->fps_counter.started && !frames->rendering_frame_consumed) {
-        fps_counter_add_skipped_frame(&frames->fps_counter);
-    }
-#endif
-
-    frames_swap(frames);
-
-    SDL_bool previous_frame_consumed = frames->rendering_frame_consumed;
-    frames->rendering_frame_consumed = SDL_FALSE;
-
-    mutex_unlock(frames->mutex);
-    return previous_frame_consumed;
-}
-
-const AVFrame *frames_consume_rendered_frame(struct frames *frames) {
-    SDL_assert(!frames->rendering_frame_consumed);
-    frames->rendering_frame_consumed = SDL_TRUE;
-    if (frames->fps_counter.started) {
-        fps_counter_add_rendered_frame(&frames->fps_counter);
-    }
-#ifndef SKIP_FRAMES
-    // if SKIP_FRAMES is disabled, then notify the decoder the current frame is
-    // consumed, so that it may push a new one
-    cond_signal(frames->rendering_frame_consumed_cond);
-#endif
-    return frames->rendering_frame;
-}
-
-void frames_stop(struct frames *frames) {
-#ifdef SKIP_FRAMES
-    (void) frames; // unused
-#else
-    mutex_lock(frames->mutex);
-    frames->stopped = SDL_TRUE;
-    mutex_unlock(frames->mutex);
-    // wake up blocking wait
-    cond_signal(frames->rendering_frame_consumed_cond);
-#endif
-}

app/src/input_manager.c

@@ -5,11 +5,13 @@
 #include "lock_util.h"
 #include "log.h"
 
-// Convert window coordinates (as provided by SDL_GetMouseState() to renderer coordinates (as provided in SDL mouse events)
+// Convert window coordinates (as provided by SDL_GetMouseState() to renderer
+// coordinates (as provided in SDL mouse events)
 //
 // See my question:
 // <https://stackoverflow.com/questions/49111054/how-to-get-mouse-position-on-mouse-wheel-event>
-static void convert_to_renderer_coordinates(SDL_Renderer *renderer, int *x, int *y) {
+static void
+convert_to_renderer_coordinates(SDL_Renderer *renderer, int *x, int *y) {
     SDL_Rect viewport;
     float scale_x, scale_y;
     SDL_RenderGetViewport(renderer, &viewport);
@@ -18,7 +20,8 @@ static void convert_to_renderer_coordinates(SDL_Renderer *renderer, int *x, int
     *y = (int) (*y / scale_y) - viewport.y;
 }
 
-static struct point get_mouse_point(struct screen *screen) {
+static struct point
+get_mouse_point(struct screen *screen) {
     int x;
     int y;
     SDL_GetMouseState(&x, &y);
@@ -32,7 +35,9 @@ static struct point get_mouse_point(struct screen *screen) {
 static const int ACTION_DOWN = 1;
 static const int ACTION_UP = 1 << 1;
 
-static void send_keycode(struct controller *controller, enum android_keycode keycode, int actions, const char *name) {
+static void
+send_keycode(struct controller *controller, enum android_keycode keycode,
+             int actions, const char *name) {
     // send DOWN event
     struct control_event control_event;
     control_event.type = CONTROL_EVENT_TYPE_KEYCODE;
@@ -55,58 +60,93 @@ static void send_keycode(struct controller *controller, enum android_keycode key
     }
 }
 
-static inline void action_home(struct controller *controller, int actions) {
+static inline void
+action_home(struct controller *controller, int actions) {
     send_keycode(controller, AKEYCODE_HOME, actions, "HOME");
 }
 
-static inline void action_back(struct controller *controller, int actions) {
+static inline void
+action_back(struct controller *controller, int actions) {
     send_keycode(controller, AKEYCODE_BACK, actions, "BACK");
 }
 
-static inline void action_app_switch(struct controller *controller, int actions) {
+static inline void
+action_app_switch(struct controller *controller, int actions) {
     send_keycode(controller, AKEYCODE_APP_SWITCH, actions, "APP_SWITCH");
 }
 
-static inline void action_power(struct controller *controller, int actions) {
+static inline void
+action_power(struct controller *controller, int actions) {
     send_keycode(controller, AKEYCODE_POWER, actions, "POWER");
 }
 
-static inline void action_volume_up(struct controller *controller, int actions) {
+static inline void
+action_volume_up(struct controller *controller, int actions) {
     send_keycode(controller, AKEYCODE_VOLUME_UP, actions, "VOLUME_UP");
 }
 
-static inline void action_volume_down(struct controller *controller, int actions) {
+static inline void
+action_volume_down(struct controller *controller, int actions) {
     send_keycode(controller, AKEYCODE_VOLUME_DOWN, actions, "VOLUME_DOWN");
 }
 
-static inline void action_menu(struct controller *controller, int actions) {
+static inline void
+action_menu(struct controller *controller, int actions) {
     send_keycode(controller, AKEYCODE_MENU, actions, "MENU");
 }
 
 // turn the screen on if it was off, press BACK otherwise
-static void press_back_or_turn_screen_on(struct controller *controller) {
+static void
+press_back_or_turn_screen_on(struct controller *controller) {
     struct control_event control_event;
     control_event.type = CONTROL_EVENT_TYPE_COMMAND;
-    control_event.command_event.action = CONTROL_EVENT_COMMAND_BACK_OR_SCREEN_ON;
+    control_event.command_event.action =
+            CONTROL_EVENT_COMMAND_BACK_OR_SCREEN_ON;
 
     if (!controller_push_event(controller, &control_event)) {
         LOGW("Cannot turn screen on");
     }
 }
 
-static void switch_fps_counter_state(struct frames *frames) {
+static void
-    mutex_lock(frames->mutex);
+expand_notification_panel(struct controller *controller) {
-    if (frames->fps_counter.started) {
+    struct control_event control_event;
-        LOGI("FPS counter stopped");
+    control_event.type = CONTROL_EVENT_TYPE_COMMAND;
-        fps_counter_stop(&frames->fps_counter);
+    control_event.command_event.action =
-    } else {
+            CONTROL_EVENT_COMMAND_EXPAND_NOTIFICATION_PANEL;
-        LOGI("FPS counter started");
+
-        fps_counter_start(&frames->fps_counter);
+    if (!controller_push_event(controller, &control_event)) {
+        LOGW("Cannot expand notification panel");
     }
-    mutex_unlock(frames->mutex);
 }
 
-static void clipboard_paste(struct controller *controller) {
+static void
+collapse_notification_panel(struct controller *controller) {
+    struct control_event control_event;
+    control_event.type = CONTROL_EVENT_TYPE_COMMAND;
+    control_event.command_event.action =
+            CONTROL_EVENT_COMMAND_COLLAPSE_NOTIFICATION_PANEL;
+
+    if (!controller_push_event(controller, &control_event)) {
+        LOGW("Cannot collapse notification panel");
+    }
+}
+
+static void
+switch_fps_counter_state(struct video_buffer *vb) {
+    mutex_lock(vb->mutex);
+    if (vb->fps_counter.started) {
+        LOGI("FPS counter stopped");
+        fps_counter_stop(&vb->fps_counter);
+    } else {
+        LOGI("FPS counter started");
+        fps_counter_start(&vb->fps_counter);
+    }
+    mutex_unlock(vb->mutex);
+}
+
+static void
+clipboard_paste(struct controller *controller) {
     char *text = SDL_GetClipboardText();
     if (!text) {
         LOGW("Cannot get clipboard text: %s", SDL_GetError());
@@ -127,8 +167,9 @@ static void clipboard_paste(struct controller *controller) {
     }
 }
 
-void input_manager_process_text_input(struct input_manager *input_manager,
+void
-                                      const SDL_TextInputEvent *event) {
+input_manager_process_text_input(struct input_manager *input_manager,
+                                 const SDL_TextInputEvent *event) {
     char c = event->text[0];
     if (isalpha(c) || c == ' ') {
         SDL_assert(event->text[1] == '\0');
@@ -148,11 +189,13 @@ void input_manager_process_text_input(struct input_manager *input_manager,
     }
 }
 
-void input_manager_process_key(struct input_manager *input_manager,
+void
-                               const SDL_KeyboardEvent *event) {
+input_manager_process_key(struct input_manager *input_manager,
-    SDL_bool ctrl = event->keysym.mod & (KMOD_LCTRL | KMOD_RCTRL);
+                          const SDL_KeyboardEvent *event,
-    SDL_bool alt = event->keysym.mod & (KMOD_LALT | KMOD_RALT);
+                          bool control) {
-    SDL_bool meta = event->keysym.mod & (KMOD_LGUI | KMOD_RGUI);
+    bool ctrl = event->keysym.mod & (KMOD_LCTRL | KMOD_RCTRL);
+    bool alt = event->keysym.mod & (KMOD_LALT | KMOD_RALT);
+    bool meta = event->keysym.mod & (KMOD_LGUI | KMOD_RGUI);
 
     if (alt) {
         // no shortcut involves Alt or Meta, and they should not be forwarded
@@ -162,47 +205,42 @@ void input_manager_process_key(struct input_manager *input_manager,
 
     // capture all Ctrl events
     if (ctrl | meta) {
-        SDL_bool shift = event->keysym.mod & (KMOD_LSHIFT | KMOD_RSHIFT);
-        if (shift) {
-            // currently, there is no shortcut involving SHIFT
-            return;
-        }
-
         SDL_Keycode keycode = event->keysym.sym;
         int action = event->type == SDL_KEYDOWN ? ACTION_DOWN : ACTION_UP;
-        SDL_bool repeat = event->repeat;
+        bool repeat = event->repeat;
+        bool shift = event->keysym.mod & (KMOD_LSHIFT | KMOD_RSHIFT);
         switch (keycode) {
             case SDLK_h:
-                if (ctrl && !meta && !repeat) {
+                if (control && ctrl && !meta && !shift && !repeat) {
                     action_home(input_manager->controller, action);
                 }
                 return;
             case SDLK_b: // fall-through
             case SDLK_BACKSPACE:
-                if (ctrl && !meta && !repeat) {
+                if (control && ctrl && !meta && !shift && !repeat) {
                     action_back(input_manager->controller, action);
                 }
                 return;
             case SDLK_s:
-                if (ctrl && !meta && !repeat) {
+                if (control && ctrl && !meta && !shift && !repeat) {
                     action_app_switch(input_manager->controller, action);
                 }
                 return;
             case SDLK_m:
-                if (ctrl && !meta && !repeat) {
+                if (control && ctrl && !meta && !shift && !repeat) {
                     action_menu(input_manager->controller, action);
                 }
                 return;
             case SDLK_p:
-                if (ctrl && !meta && !repeat) {
+                if (control && ctrl && !meta && !shift && !repeat) {
                     action_power(input_manager->controller, action);
                 }
                 return;
             case SDLK_DOWN:
 #ifdef __APPLE__
-                if (!ctrl && meta) {
+                if (control && !ctrl && meta && !shift) {
 #else
-                if (ctrl && !meta) {
+                if (control && ctrl && !meta && !shift) {
 #endif
                     // forward repeated events
                     action_volume_down(input_manager->controller, action);
@@ -210,37 +248,52 @@ void input_manager_process_key(struct input_manager *input_manager,
                 return;
             case SDLK_UP:
 #ifdef __APPLE__
-                if (!ctrl && meta) {
+                if (control && !ctrl && meta && !shift) {
 #else
-                if (ctrl && !meta) {
+                if (control && ctrl && !meta && !shift) {
 #endif
                     // forward repeated events
                     action_volume_up(input_manager->controller, action);
                 }
                 return;
             case SDLK_v:
-                if (ctrl && !meta && !repeat && event->type == SDL_KEYDOWN) {
+                if (control && ctrl && !meta && !shift && !repeat
+                        && event->type == SDL_KEYDOWN) {
                     clipboard_paste(input_manager->controller);
                 }
                 return;
             case SDLK_f:
-                if (ctrl && !meta && !repeat && event->type == SDL_KEYDOWN) {
+                if (ctrl && !meta && !shift && !repeat
+                        && event->type == SDL_KEYDOWN) {
                     screen_switch_fullscreen(input_manager->screen);
                 }
                 return;
             case SDLK_x:
-                if (ctrl && !meta && !repeat && event->type == SDL_KEYDOWN) {
+                if (ctrl && !meta && !shift && !repeat
+                        && event->type == SDL_KEYDOWN) {
                     screen_resize_to_fit(input_manager->screen);
                 }
                 return;
             case SDLK_g:
-                if (ctrl && !meta && !repeat && event->type == SDL_KEYDOWN) {
+                if (ctrl && !meta && !shift && !repeat
+                        && event->type == SDL_KEYDOWN) {
                     screen_resize_to_pixel_perfect(input_manager->screen);
                 }
                 return;
             case SDLK_i:
-                if (ctrl && !meta && !repeat && event->type == SDL_KEYDOWN) {
+                if (ctrl && !meta && !shift && !repeat
-                    switch_fps_counter_state(input_manager->frames);
+                        && event->type == SDL_KEYDOWN) {
+                    switch_fps_counter_state(input_manager->video_buffer);
+                }
+                return;
+            case SDLK_n:
+                if (control && ctrl && !meta
+                        && !repeat && event->type == SDL_KEYDOWN) {
+                    if (shift) {
+                        collapse_notification_panel(input_manager->controller);
+                    } else {
+                        expand_notification_panel(input_manager->controller);
+                    }
                 }
                 return;
         }
@@ -248,6 +301,10 @@ void input_manager_process_key(struct input_manager *input_manager,
         return;
     }
 
+    if (!control) {
+        return;
+    }
+
     struct control_event control_event;
     if (input_key_from_sdl_to_android(event, &control_event)) {
         if (!controller_push_event(input_manager->controller, &control_event)) {
@@ -256,43 +313,48 @@ void input_manager_process_key(struct input_manager *input_manager,
     }
 }
 
-void input_manager_process_mouse_motion(struct input_manager *input_manager,
+void
-                                        const SDL_MouseMotionEvent *event) {
+input_manager_process_mouse_motion(struct input_manager *input_manager,
+                                   const SDL_MouseMotionEvent *event) {
     if (!event->state) {
         // do not send motion events when no button is pressed
         return;
     }
     struct control_event control_event;
-    if (mouse_motion_from_sdl_to_android(event, input_manager->screen->frame_size, &control_event)) {
+    if (mouse_motion_from_sdl_to_android(event,
+                                         input_manager->screen->frame_size,
+                                         &control_event)) {
         if (!controller_push_event(input_manager->controller, &control_event)) {
             LOGW("Cannot send mouse motion event");
         }
     }
 }
 
-static SDL_bool is_outside_device_screen(struct input_manager *input_manager,
+static bool
-                                         int x, int y)
+is_outside_device_screen(struct input_manager *input_manager, int x, int y)
 {
     return x < 0 || x >= input_manager->screen->frame_size.width ||
            y < 0 || y >= input_manager->screen->frame_size.height;
 }
 
-void input_manager_process_mouse_button(struct input_manager *input_manager,
+void
-                                        const SDL_MouseButtonEvent *event) {
+input_manager_process_mouse_button(struct input_manager *input_manager,
+                                   const SDL_MouseButtonEvent *event,
+                                   bool control) {
     if (event->type == SDL_MOUSEBUTTONDOWN) {
-        if (event->button == SDL_BUTTON_RIGHT) {
+        if (control && event->button == SDL_BUTTON_RIGHT) {
             press_back_or_turn_screen_on(input_manager->controller);
             return;
         }
-        if (event->button == SDL_BUTTON_MIDDLE) {
+        if (control && event->button == SDL_BUTTON_MIDDLE) {
             action_home(input_manager->controller, ACTION_DOWN | ACTION_UP);
             return;
         }
         // double-click on black borders resize to fit the device screen
         if (event->button == SDL_BUTTON_LEFT && event->clicks == 2) {
-            SDL_bool outside= is_outside_device_screen(input_manager,
+            bool outside = is_outside_device_screen(input_manager,
-                                                       event->x,
+                                                        event->x,
-                                                       event->y);
+                                                        event->y);
             if (outside) {
                 screen_resize_to_fit(input_manager->screen);
                 return;
@@ -301,16 +363,23 @@ void input_manager_process_mouse_button(struct input_manager *input_manager,
         // otherwise, send the click event to the device
     }
 
+    if (!control) {
+        return;
+    }
+
     struct control_event control_event;
-    if (mouse_button_from_sdl_to_android(event, input_manager->screen->frame_size, &control_event)) {
+    if (mouse_button_from_sdl_to_android(event,
+                                         input_manager->screen->frame_size,
+                                         &control_event)) {
         if (!controller_push_event(input_manager->controller, &control_event)) {
             LOGW("Cannot send mouse button event");
         }
     }
 }
 
-void input_manager_process_mouse_wheel(struct input_manager *input_manager,
+void
-                                       const SDL_MouseWheelEvent *event) {
+input_manager_process_mouse_wheel(struct input_manager *input_manager,
+                                  const SDL_MouseWheelEvent *event) {
     struct position position = {
         .screen_size = input_manager->screen->frame_size,
         .point = get_mouse_point(input_manager->screen),

app/src/input_manager.h

@@ -1,27 +1,40 @@
 #ifndef INPUTMANAGER_H
 #define INPUTMANAGER_H
 
+#include <stdbool.h>
+
 #include "common.h"
 #include "controller.h"
 #include "fps_counter.h"
-#include "frames.h"
+#include "video_buffer.h"
 #include "screen.h"
 
 struct input_manager {
     struct controller *controller;
-    struct frames *frames;
+    struct video_buffer *video_buffer;
     struct screen *screen;
 };
 
-void input_manager_process_text_input(struct input_manager *input_manager,
+void
-                                      const SDL_TextInputEvent *event);
+input_manager_process_text_input(struct input_manager *input_manager,
-void input_manager_process_key(struct input_manager *input_manager,
+                                 const SDL_TextInputEvent *event);
-                               const SDL_KeyboardEvent *event);
+
-void input_manager_process_mouse_motion(struct input_manager *input_manager,
+void
-                                        const SDL_MouseMotionEvent *event);
+input_manager_process_key(struct input_manager *input_manager,
-void input_manager_process_mouse_button(struct input_manager *input_manager,
+                          const SDL_KeyboardEvent *event,
-                                        const SDL_MouseButtonEvent *event);
+                          bool control);
-void input_manager_process_mouse_wheel(struct input_manager *input_manager,
+
-                                       const SDL_MouseWheelEvent *event);
+void
+input_manager_process_mouse_motion(struct input_manager *input_manager,
+                                   const SDL_MouseMotionEvent *event);
+
+void
+input_manager_process_mouse_button(struct input_manager *input_manager,
+                                   const SDL_MouseButtonEvent *event,
+                                   bool control);
+
+void
+input_manager_process_mouse_wheel(struct input_manager *input_manager,
+                                  const SDL_MouseWheelEvent *event);
 
 #endif

app/src/lock_util.c

@@ -4,28 +4,32 @@
 
 #include "log.h"
 
-void mutex_lock(SDL_mutex *mutex) {
+void
+mutex_lock(SDL_mutex *mutex) {
     if (SDL_LockMutex(mutex)) {
         LOGC("Could not lock mutex");
         abort();
     }
 }
 
-void mutex_unlock(SDL_mutex *mutex) {
+void
+mutex_unlock(SDL_mutex *mutex) {
     if (SDL_UnlockMutex(mutex)) {
         LOGC("Could not unlock mutex");
         abort();
     }
 }
 
-void cond_wait(SDL_cond *cond, SDL_mutex *mutex) {
+void
+cond_wait(SDL_cond *cond, SDL_mutex *mutex) {
     if (SDL_CondWait(cond, mutex)) {
         LOGC("Could not wait on condition");
         abort();
     }
 }
 
-void cond_signal(SDL_cond *cond) {
+void
+cond_signal(SDL_cond *cond) {
     if (SDL_CondSignal(cond)) {
         LOGC("Could not signal a condition");
         abort();

app/src/lock_util.h

@@ -5,9 +5,16 @@
 typedef struct SDL_mutex SDL_mutex;
 typedef struct SDL_cond SDL_cond;
 
-void mutex_lock(SDL_mutex *mutex);
+void
-void mutex_unlock(SDL_mutex *mutex);
+mutex_lock(SDL_mutex *mutex);
-void cond_wait(SDL_cond *cond, SDL_mutex *mutex);
+
-void cond_signal(SDL_cond *cond);
+void
+mutex_unlock(SDL_mutex *mutex);
+
+void
+cond_wait(SDL_cond *cond, SDL_mutex *mutex);
+
+void
+cond_signal(SDL_cond *cond);
 
 #endif

app/src/log.h

@@ -3,6 +3,7 @@
 
 #include <SDL2/SDL_log.h>
 
+#define LOGV(...) SDL_LogVerbose(SDL_LOG_CATEGORY_APPLICATION, __VA_ARGS__)
 #define LOGD(...) SDL_LogDebug(SDL_LOG_CATEGORY_APPLICATION, __VA_ARGS__)
 #define LOGI(...) SDL_LogInfo(SDL_LOG_CATEGORY_APPLICATION, __VA_ARGS__)
 #define LOGW(...) SDL_LogWarn(SDL_LOG_CATEGORY_APPLICATION, __VA_ARGS__)

app/src/main.c

@@ -1,24 +1,33 @@
 #include "scrcpy.h"
 
 #include <getopt.h>
+#include <stdbool.h>
+#include <stdint.h>
 #include <unistd.h>
 #include <libavformat/avformat.h>
+#define SDL_MAIN_HANDLED // avoid link error on Linux Windows Subsystem
 #include <SDL2/SDL.h>
 
+#include "compat.h"
 #include "config.h"
 #include "log.h"
+#include "recorder.h"
 
 struct args {
     const char *serial;
     const char *crop;
     const char *record_filename;
-    SDL_bool fullscreen;
+    enum recorder_format record_format;
-    SDL_bool help;
+    bool fullscreen;
-    SDL_bool version;
+    bool no_control;
-    SDL_bool show_touches;
+    bool no_display;
-    Uint16 port;
+    bool help;
-    Uint16 max_size;
+    bool version;
-    Uint32 bit_rate;
+    bool show_touches;
+    uint16_t port;
+    uint16_t max_size;
+    uint32_t bit_rate;
+    bool always_on_top;
 };
 
 static void usage(const char *arg0) {
@@ -41,6 +50,9 @@ static void usage(const char *arg0) {
         "    -f, --fullscreen\n"
         "        Start in fullscreen.\n"
         "\n"
+        "    -F, --record-format\n"
+        "        Force recording format (either mp4 or mkv).\n"
+        "\n"
         "    -h, --help\n"
         "        Print this help.\n"
         "\n"
@@ -50,12 +62,21 @@ static void usage(const char *arg0) {
         "        is preserved.\n"
         "        Default is %d%s.\n"
         "\n"
+        "    -n, --no-control\n"
+        "        Disable device control (mirror the device in read-only).\n"
+        "\n"
+        "    -N, --no-display\n"
+        "        Do not display device (only when screen recording is\n"
+        "        enabled).\n"
+        "\n"
         "    -p, --port port\n"
         "        Set the TCP port the client listens on.\n"
         "        Default is %d.\n"
         "\n"
         "    -r, --record file.mp4\n"
         "        Record screen to file.\n"
+        "        The format is determined by the -F/--record-format option if\n"
+        "        set, or by the file extension (.mp4 or .mkv).\n"
         "\n"
         "    -s, --serial\n"
         "        The device serial number. Mandatory only if several devices\n"
@@ -65,6 +86,9 @@ static void usage(const char *arg0) {
         "        Enable \"show touches\" on start, disable on quit.\n"
         "        It only shows physical touches (not clicks from scrcpy).\n"
         "\n"
+        "    -T, --always-on-top\n"
+        "        Make scrcpy window always on top (above other windows).\n"
+        "\n"
         "    -v, --version\n"
         "        Print the version of scrcpy.\n"
         "\n"
@@ -81,7 +105,6 @@ static void usage(const char *arg0) {
         "        resize window to remove black borders\n"
         "\n"
         "    Ctrl+h\n"
-        "    Home\n"
         "    Middle-click\n"
         "        click on HOME\n"
         "\n"
@@ -108,6 +131,12 @@ static void usage(const char *arg0) {
         "    Right-click (when screen is off)\n"
         "        turn screen on\n"
         "\n"
+        "    Ctrl+n\n"
+        "       expand notification panel\n"
+        "\n"
+        "    Ctrl+Shift+n\n"
+        "       collapse notification panel\n"
+        "\n"
         "    Ctrl+v\n"
         "        paste computer clipboard to device\n"
         "\n"
@@ -123,28 +152,37 @@ static void usage(const char *arg0) {
         DEFAULT_LOCAL_PORT);
 }
 
-static void print_version(void) {
+static void
+print_version(void) {
     fprintf(stderr, "scrcpy %s\n\n", SCRCPY_VERSION);
 
     fprintf(stderr, "dependencies:\n");
-    fprintf(stderr, " - SDL %d.%d.%d\n", SDL_MAJOR_VERSION, SDL_MINOR_VERSION, SDL_PATCHLEVEL);
+    fprintf(stderr, " - SDL %d.%d.%d\n", SDL_MAJOR_VERSION, SDL_MINOR_VERSION,
-    fprintf(stderr, " - libavcodec %d.%d.%d\n", LIBAVCODEC_VERSION_MAJOR, LIBAVCODEC_VERSION_MINOR, LIBAVCODEC_VERSION_MICRO);
+                                         SDL_PATCHLEVEL);
-    fprintf(stderr, " - libavformat %d.%d.%d\n", LIBAVFORMAT_VERSION_MAJOR, LIBAVFORMAT_VERSION_MINOR, LIBAVFORMAT_VERSION_MICRO);
+    fprintf(stderr, " - libavcodec %d.%d.%d\n", LIBAVCODEC_VERSION_MAJOR,
-    fprintf(stderr, " - libavutil %d.%d.%d\n", LIBAVUTIL_VERSION_MAJOR, LIBAVUTIL_VERSION_MINOR, LIBAVUTIL_VERSION_MICRO);
+                                                LIBAVCODEC_VERSION_MINOR,
+                                                LIBAVCODEC_VERSION_MICRO);
+    fprintf(stderr, " - libavformat %d.%d.%d\n", LIBAVFORMAT_VERSION_MAJOR,
+                                                 LIBAVFORMAT_VERSION_MINOR,
+                                                 LIBAVFORMAT_VERSION_MICRO);
+    fprintf(stderr, " - libavutil %d.%d.%d\n", LIBAVUTIL_VERSION_MAJOR,
+                                               LIBAVUTIL_VERSION_MINOR,
+                                               LIBAVUTIL_VERSION_MICRO);
 }
 
-static SDL_bool parse_bit_rate(char *optarg, Uint32 *bit_rate) {
+static bool
+parse_bit_rate(char *optarg, uint32_t *bit_rate) {
     char *endptr;
     if (*optarg == '\0') {
         LOGE("Bit-rate parameter is empty");
-        return SDL_FALSE;
+        return false;
     }
     long value = strtol(optarg, &endptr, 0);
     int mul = 1;
     if (*endptr != '\0') {
         if (optarg == endptr) {
             LOGE("Invalid bit-rate: %s", optarg);
-            return SDL_FALSE;
+            return false;
         }
         if ((*endptr == 'M' || *endptr == 'm') && endptr[1] == '\0') {
             mul = 1000000;
@@ -152,97 +190,146 @@ static SDL_bool parse_bit_rate(char *optarg, Uint32 *bit_rate) {
             mul = 1000;
         } else {
             LOGE("Invalid bit-rate unit: %s", optarg);
-            return SDL_FALSE;
+            return false;
         }
     }
-    if (value < 0 || ((Uint32) -1) / mul < value) {
+    if (value < 0 || ((uint32_t) -1) / mul < value) {
         LOGE("Bitrate must be positive and less than 2^32: %s", optarg);
-        return SDL_FALSE;
+        return false;
     }
 
-    *bit_rate = (Uint32) value * mul;
+    *bit_rate = (uint32_t) value * mul;
-    return SDL_TRUE;
+    return true;
 }
 
-static SDL_bool parse_max_size(char *optarg, Uint16 *max_size) {
+static bool
+parse_max_size(char *optarg, uint16_t *max_size) {
     char *endptr;
     if (*optarg == '\0') {
         LOGE("Max size parameter is empty");
-        return SDL_FALSE;
+        return false;
     }
     long value = strtol(optarg, &endptr, 0);
     if (*endptr != '\0') {
         LOGE("Invalid max size: %s", optarg);
-        return SDL_FALSE;
+        return false;
     }
     if (value & ~0xffff) {
         LOGE("Max size must be between 0 and 65535: %ld", value);
-        return SDL_FALSE;
+        return false;
     }
 
-    *max_size = (Uint16) value;
+    *max_size = (uint16_t) value;
-    return SDL_TRUE;
+    return true;
 }
 
-static SDL_bool parse_port(char *optarg, Uint16 *port) {
+static bool
+parse_port(char *optarg, uint16_t *port) {
     char *endptr;
     if (*optarg == '\0') {
         LOGE("Invalid port parameter is empty");
-        return SDL_FALSE;
+        return false;
     }
     long value = strtol(optarg, &endptr, 0);
     if (*endptr != '\0') {
         LOGE("Invalid port: %s", optarg);
-        return SDL_FALSE;
+        return false;
     }
     if (value & ~0xffff) {
         LOGE("Port out of range: %ld", value);
-        return SDL_FALSE;
+        return false;
     }
 
-    *port = (Uint16) value;
+    *port = (uint16_t) value;
-    return SDL_TRUE;
+    return true;
 }
 
-static SDL_bool parse_args(struct args *args, int argc, char *argv[]) {
+static bool
+parse_record_format(const char *optarg, enum recorder_format *format) {
+    if (!strcmp(optarg, "mp4")) {
+        *format = RECORDER_FORMAT_MP4;
+        return true;
+    }
+    if (!strcmp(optarg, "mkv")) {
+        *format = RECORDER_FORMAT_MKV;
+        return true;
+    }
+    LOGE("Unsupported format: %s (expected mp4 or mkv)", optarg);
+    return false;
+}
+
+static enum recorder_format
+guess_record_format(const char *filename) {
+    size_t len = strlen(filename);
+    if (len < 4) {
+        return 0;
+    }
+    const char *ext = &filename[len - 4];
+    if (!strcmp(ext, ".mp4")) {
+        return RECORDER_FORMAT_MP4;
+    }
+    if (!strcmp(ext, ".mkv")) {
+        return RECORDER_FORMAT_MKV;
+    }
+    return 0;
+}
+
+static bool
+parse_args(struct args *args, int argc, char *argv[]) {
     static const struct option long_options[] = {
-        {"bit-rate",     required_argument, NULL, 'b'},
+        {"always-on-top", no_argument,       NULL, 'T'},
-        {"crop",         required_argument, NULL, 'c'},
+        {"bit-rate",      required_argument, NULL, 'b'},
-        {"fullscreen",   no_argument,       NULL, 'f'},
+        {"crop",          required_argument, NULL, 'c'},
-        {"help",         no_argument,       NULL, 'h'},
+        {"fullscreen",    no_argument,       NULL, 'f'},
-        {"max-size",     required_argument, NULL, 'm'},
+        {"help",          no_argument,       NULL, 'h'},
-        {"port",         required_argument, NULL, 'p'},
+        {"max-size",      required_argument, NULL, 'm'},
-        {"record",       required_argument, NULL, 'r'},
+        {"no-control",    no_argument,       NULL, 'n'},
-        {"serial",       required_argument, NULL, 's'},
+        {"no-display",    no_argument,       NULL, 'N'},
-        {"show-touches", no_argument,       NULL, 't'},
+        {"port",          required_argument, NULL, 'p'},
-        {"version",      no_argument,       NULL, 'v'},
+        {"record",        required_argument, NULL, 'r'},
-        {NULL,           0,                 NULL, 0  },
+        {"record-format", required_argument, NULL, 'f'},
+        {"serial",        required_argument, NULL, 's'},
+        {"show-touches",  no_argument,       NULL, 't'},
+        {"version",       no_argument,       NULL, 'v'},
+        {NULL,            0,                 NULL, 0  },
     };
     int c;
-    while ((c = getopt_long(argc, argv, "b:c:fhm:p:r:s:tv", long_options, NULL)) != -1) {
+    while ((c = getopt_long(argc, argv, "b:c:fF:hm:nNp:r:s:tTv", long_options,
+                            NULL)) != -1) {
         switch (c) {
             case 'b':
                 if (!parse_bit_rate(optarg, &args->bit_rate)) {
-                    return SDL_FALSE;
+                    return false;
                 }
                 break;
             case 'c':
                 args->crop = optarg;
                 break;
             case 'f':
-                args->fullscreen = SDL_TRUE;
+                args->fullscreen = true;
+                break;
+            case 'F':
+                if (!parse_record_format(optarg, &args->record_format)) {
+                    return false;
+                }
                 break;
             case 'h':
-                args->help = SDL_TRUE;
+                args->help = true;
                 break;
             case 'm':
                 if (!parse_max_size(optarg, &args->max_size)) {
-                    return SDL_FALSE;
+                    return false;
                 }
                 break;
+            case 'n':
+                args->no_control = true;
+                break;
+            case 'N':
+                args->no_display = true;
+                break;
             case 'p':
                 if (!parse_port(optarg, &args->port)) {
-                    return SDL_FALSE;
+                    return false;
                 }
                 break;
             case 'r':
@@ -252,26 +339,55 @@ static SDL_bool parse_args(struct args *args, int argc, char *argv[]) {
                 args->serial = optarg;
                 break;
             case 't':
-                args->show_touches = SDL_TRUE;
+                args->show_touches = true;
+                break;
+            case 'T':
+                args->always_on_top = true;
                 break;
             case 'v':
-                args->version = SDL_TRUE;
+                args->version = true;
                 break;
             default:
                 // getopt prints the error message on stderr
-                return SDL_FALSE;
+                return false;
         }
     }
 
+    if (args->no_display && !args->record_filename) {
+        LOGE("-N/--no-display requires screen recording (-r/--record)");
+        return false;
+    }
+
+    if (args->no_display && args->fullscreen) {
+        LOGE("-f/--fullscreen-window is incompatible with -N/--no-display");
+        return false;
+    }
+
     int index = optind;
     if (index < argc) {
         LOGE("Unexpected additional argument: %s", argv[index]);
-        return SDL_FALSE;
+        return false;
     }
-    return SDL_TRUE;
+
+    if (args->record_format && !args->record_filename) {
+        LOGE("Record format specified without recording");
+        return false;
+    }
+
+    if (args->record_filename && !args->record_format) {
+        args->record_format = guess_record_format(args->record_filename);
+        if (!args->record_format) {
+            LOGE("No format specified for \"%s\" (try with -F mkv)",
+                 args->record_filename);
+            return false;
+        }
+    }
+
+    return true;
 }
 
-int main(int argc, char *argv[]) {
+int
+main(int argc, char *argv[]) {
 #ifdef __WINDOWS__
     // disable buffering, we want logs immediately
     // even line buffering (setvbuf() with mode _IOLBF) is not sufficient
@@ -282,12 +398,16 @@ int main(int argc, char *argv[]) {
         .serial = NULL,
         .crop = NULL,
         .record_filename = NULL,
-        .help = SDL_FALSE,
+        .record_format = 0,
-        .version = SDL_FALSE,
+        .help = false,
-        .show_touches = SDL_FALSE,
+        .version = false,
+        .show_touches = false,
         .port = DEFAULT_LOCAL_PORT,
         .max_size = DEFAULT_MAX_SIZE,
         .bit_rate = DEFAULT_BIT_RATE,
+        .always_on_top = false,
+        .no_control = false,
+        .no_display = false,
     };
     if (!parse_args(&args, argc, argv)) {
         return 1;
@@ -303,7 +423,7 @@ int main(int argc, char *argv[]) {
         return 0;
     }
 
-#if LIBAVCODEC_VERSION_INT < AV_VERSION_INT(58, 9, 100)
+#ifdef SCRCPY_LAVF_REQUIRES_REGISTER_ALL
     av_register_all();
 #endif
 
@@ -320,10 +440,14 @@ int main(int argc, char *argv[]) {
         .crop = args.crop,
         .port = args.port,
         .record_filename = args.record_filename,
+        .record_format = args.record_format,
         .max_size = args.max_size,
         .bit_rate = args.bit_rate,
         .show_touches = args.show_touches,
         .fullscreen = args.fullscreen,
+        .always_on_top = args.always_on_top,
+        .no_control = args.no_control,
+        .no_display = args.no_display,
     };
     int res = scrcpy(&options) ? 0 : 1;
 

app/src/net.c

@@ -18,7 +18,8 @@
   typedef struct in_addr IN_ADDR;
 #endif
 
-socket_t net_connect(Uint32 addr, Uint16 port) {
+socket_t
+net_connect(uint32_t addr, uint16_t port) {
     socket_t sock = socket(AF_INET, SOCK_STREAM, 0);
     if (sock == INVALID_SOCKET) {
         perror("socket");
@@ -38,7 +39,8 @@ socket_t net_connect(Uint32 addr, Uint16 port) {
     return sock;
 }
 
-socket_t net_listen(Uint32 addr, Uint16 port, int backlog) {
+socket_t
+net_listen(uint32_t addr, uint16_t port, int backlog) {
     socket_t sock = socket(AF_INET, SOCK_STREAM, 0);
     if (sock == INVALID_SOCKET) {
         perror("socket");
@@ -46,7 +48,8 @@ socket_t net_listen(Uint32 addr, Uint16 port, int backlog) {
     }
 
     int reuse = 1;
-    if (setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, (const void *) &reuse, sizeof(reuse)) == -1) {
+    if (setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, (const void *) &reuse,
+                   sizeof(reuse)) == -1) {
         perror("setsockopt(SO_REUSEADDR)");
     }
 
@@ -68,25 +71,30 @@ socket_t net_listen(Uint32 addr, Uint16 port, int backlog) {
     return sock;
 }
 
-socket_t net_accept(socket_t server_socket) {
+socket_t
+net_accept(socket_t server_socket) {
     SOCKADDR_IN csin;
     socklen_t sinsize = sizeof(csin);
     return accept(server_socket, (SOCKADDR *) &csin, &sinsize);
 }
 
-ssize_t net_recv(socket_t socket, void *buf, size_t len) {
+ssize_t
+net_recv(socket_t socket, void *buf, size_t len) {
     return recv(socket, buf, len, 0);
 }
 
-ssize_t net_recv_all(socket_t socket, void *buf, size_t len) {
+ssize_t
+net_recv_all(socket_t socket, void *buf, size_t len) {
     return recv(socket, buf, len, MSG_WAITALL);
 }
 
-ssize_t net_send(socket_t socket, const void *buf, size_t len) {
+ssize_t
+net_send(socket_t socket, const void *buf, size_t len) {
     return send(socket, buf, len, 0);
 }
 
-ssize_t net_send_all(socket_t socket, const void *buf, size_t len) {
+ssize_t
+net_send_all(socket_t socket, const void *buf, size_t len) {
     ssize_t w = 0;
     while (len > 0) {
         w = send(socket, buf, len, 0);
@@ -99,6 +107,7 @@ ssize_t net_send_all(socket_t socket, const void *buf, size_t len) {
     return w;
 }
 
-SDL_bool net_shutdown(socket_t socket, int how) {
+bool
+net_shutdown(socket_t socket, int how) {
     return !shutdown(socket, how);
 }

app/src/net.h

@@ -1,8 +1,9 @@
 #ifndef NET_H
 #define NET_H
 
+#include <stdbool.h>
+#include <stdint.h>
 #include <SDL2/SDL_platform.h>
-#include <SDL2/SDL_stdinc.h>
 
 #ifdef __WINDOWS__
 # include <winsock2.h>
@@ -16,20 +17,39 @@
   typedef int socket_t;
 #endif
 
-SDL_bool net_init(void);
+bool
-void net_cleanup(void);
+net_init(void);
 
-socket_t net_connect(Uint32 addr, Uint16 port);
+void
-socket_t net_listen(Uint32 addr, Uint16 port, int backlog);
+net_cleanup(void);
-socket_t net_accept(socket_t server_socket);
+
+socket_t
+net_connect(uint32_t addr, uint16_t port);
+
+socket_t
+net_listen(uint32_t addr, uint16_t port, int backlog);
+
+socket_t
+net_accept(socket_t server_socket);
 
 // the _all versions wait/retry until len bytes have been written/read
-ssize_t net_recv(socket_t socket, void *buf, size_t len);
+ssize_t
-ssize_t net_recv_all(socket_t socket, void *buf, size_t len);
+net_recv(socket_t socket, void *buf, size_t len);
-ssize_t net_send(socket_t socket, const void *buf, size_t len);
+
-ssize_t net_send_all(socket_t socket, const void *buf, size_t len);
+ssize_t
+net_recv_all(socket_t socket, void *buf, size_t len);
+
+ssize_t
+net_send(socket_t socket, const void *buf, size_t len);
+
+ssize_t
+net_send_all(socket_t socket, const void *buf, size_t len);
+
 // how is SHUT_RD (read), SHUT_WR (write) or SHUT_RDWR (both)
-SDL_bool net_shutdown(socket_t socket, int how);
+bool
-SDL_bool net_close(socket_t socket);
+net_shutdown(socket_t socket, int how);
+
+bool
+net_close(socket_t socket);
 
 #endif

app/src/recorder.c

@@ -1,75 +1,92 @@
 #include "recorder.h"
 
 #include <libavutil/time.h>
+#include <SDL2/SDL_assert.h>
 
+#include "compat.h"
 #include "config.h"
 #include "log.h"
 
-static const AVOutputFormat *find_mp4_muxer(void) {
+static const AVRational SCRCPY_TIME_BASE = {1, 1000000}; // timestamps in us
-#if LIBAVFORMAT_VERSION_INT >= AV_VERSION_INT(58, 9, 100)
+
+static const AVOutputFormat *
+find_muxer(const char *name) {
+#ifdef SCRCPY_LAVF_HAS_NEW_MUXER_ITERATOR_API
     void *opaque = NULL;
 #endif
     const AVOutputFormat *oformat = NULL;
     do {
-#if LIBAVFORMAT_VERSION_INT >= AV_VERSION_INT(58, 9, 100)
+#ifdef SCRCPY_LAVF_HAS_NEW_MUXER_ITERATOR_API
         oformat = av_muxer_iterate(&opaque);
 #else
         oformat = av_oformat_next(oformat);
 #endif
         // until null or with name "mp4"
-    } while (oformat && strcmp(oformat->name, "mp4"));
+    } while (oformat && strcmp(oformat->name, name));
     return oformat;
 }
 
-SDL_bool recorder_init(struct recorder *recorder, const char *filename,
+bool
-                       struct size declared_frame_size) {
+recorder_init(struct recorder *recorder,
+              const char *filename,
+              enum recorder_format format,
+              struct size declared_frame_size) {
     recorder->filename = SDL_strdup(filename);
     if (!recorder->filename) {
         LOGE("Cannot strdup filename");
-        return SDL_FALSE;
+        return false;
     }
 
+    recorder->format = format;
     recorder->declared_frame_size = declared_frame_size;
+    recorder->header_written = false;
 
-    return SDL_TRUE;
+    return true;
 }
 
-void recorder_destroy(struct recorder *recorder) {
+void
+recorder_destroy(struct recorder *recorder) {
     SDL_free(recorder->filename);
 }
 
-SDL_bool recorder_open(struct recorder *recorder, AVCodec *input_codec) {
+static const char *
-    const AVOutputFormat *mp4 = find_mp4_muxer();
+recorder_get_format_name(enum recorder_format format) {
-    if (!mp4) {
+    switch (format) {
-        LOGE("Could not find mp4 muxer");
+        case RECORDER_FORMAT_MP4: return "mp4";
-        return SDL_FALSE;
+        case RECORDER_FORMAT_MKV: return "matroska";
+        default: return NULL;
+    }
+}
+
+bool
+recorder_open(struct recorder *recorder, const AVCodec *input_codec) {
+    const char *format_name = recorder_get_format_name(recorder->format);
+    SDL_assert(format_name);
+    const AVOutputFormat *format = find_muxer(format_name);
+    if (!format) {
+        LOGE("Could not find muxer");
+        return false;
     }
 
     recorder->ctx = avformat_alloc_context();
     if (!recorder->ctx) {
         LOGE("Could not allocate output context");
-        return SDL_FALSE;
+        return false;
     }
 
     // contrary to the deprecated API (av_oformat_next()), av_muxer_iterate()
     // returns (on purpose) a pointer-to-const, but AVFormatContext.oformat
     // still expects a pointer-to-non-const (it has not be updated accordingly)
     // <https://github.com/FFmpeg/FFmpeg/commit/0694d8702421e7aff1340038559c438b61bb30dd>
-    recorder->ctx->oformat = (AVOutputFormat *) mp4;
+    recorder->ctx->oformat = (AVOutputFormat *) format;
 
     AVStream *ostream = avformat_new_stream(recorder->ctx, input_codec);
     if (!ostream) {
         avformat_free_context(recorder->ctx);
-        return SDL_FALSE;
+        return false;
     }
 
-// In ffmpeg/doc/APIchanges:
+#ifdef SCRCPY_LAVF_HAS_NEW_CODEC_PARAMS_API
-// 2016-04-11 - 6f69f7a / 9200514 - lavf 57.33.100 / 57.5.0 - avformat.h
-//   Add AVStream.codecpar, deprecate AVStream.codec.
-#if    (LIBAVFORMAT_VERSION_MICRO >= 100 /* FFmpeg */ && \
-        LIBAVFORMAT_VERSION_INT >= AV_VERSION_INT(57, 33, 100)) \
-    || (LIBAVFORMAT_VERSION_MICRO < 100 && /* Libav */ \
-        LIBAVFORMAT_VERSION_INT >= AV_VERSION_INT(57, 5, 0))
     ostream->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
     ostream->codecpar->codec_id = input_codec->id;
     ostream->codecpar->format = AV_PIX_FMT_YUV420P;
@@ -82,7 +99,6 @@ SDL_bool recorder_open(struct recorder *recorder, AVCodec *input_codec) {
     ostream->codec->width = recorder->declared_frame_size.width;
     ostream->codec->height = recorder->declared_frame_size.height;
 #endif
-    ostream->time_base = (AVRational) {1, 1000000}; // timestamps in us
 
     int ret = avio_open(&recorder->ctx->pb, recorder->filename,
                         AVIO_FLAG_WRITE);
@@ -90,29 +106,76 @@ SDL_bool recorder_open(struct recorder *recorder, AVCodec *input_codec) {
         LOGE("Failed to open output file: %s", recorder->filename);
         // ostream will be cleaned up during context cleaning
         avformat_free_context(recorder->ctx);
-        return SDL_FALSE;
+        return false;
     }
 
-    ret = avformat_write_header(recorder->ctx, NULL);
+    LOGI("Recording started to %s file: %s", format_name, recorder->filename);
-    if (ret < 0) {
-        LOGE("Failed to write header to %s", recorder->filename);
-        avio_closep(&recorder->ctx->pb);
-        avformat_free_context(recorder->ctx);
-        return SDL_FALSE;
-    }
 
-    return SDL_TRUE;
+    return true;
 }
 
-void recorder_close(struct recorder *recorder) {
+void
+recorder_close(struct recorder *recorder) {
     int ret = av_write_trailer(recorder->ctx);
     if (ret < 0) {
         LOGE("Failed to write trailer to %s", recorder->filename);
     }
     avio_close(recorder->ctx->pb);
     avformat_free_context(recorder->ctx);
+
+    const char *format_name = recorder_get_format_name(recorder->format);
+    LOGI("Recording complete to %s file: %s", format_name, recorder->filename);
 }
 
-SDL_bool recorder_write(struct recorder *recorder, AVPacket *packet) {
+static bool
+recorder_write_header(struct recorder *recorder, const AVPacket *packet) {
+    AVStream *ostream = recorder->ctx->streams[0];
+
+    uint8_t *extradata = av_malloc(packet->size * sizeof(uint8_t));
+    if (!extradata) {
+        LOGC("Cannot allocate extradata");
+        return false;
+    }
+
+    // copy the first packet to the extra data
+    memcpy(extradata, packet->data, packet->size);
+
+#ifdef SCRCPY_LAVF_HAS_NEW_CODEC_PARAMS_API
+    ostream->codecpar->extradata = extradata;
+    ostream->codecpar->extradata_size = packet->size;
+#else
+    ostream->codec->extradata = extradata;
+    ostream->codec->extradata_size = packet->size;
+#endif
+
+    int ret = avformat_write_header(recorder->ctx, NULL);
+    if (ret < 0) {
+        LOGE("Failed to write header to %s", recorder->filename);
+        SDL_free(extradata);
+        avio_closep(&recorder->ctx->pb);
+        avformat_free_context(recorder->ctx);
+        return false;
+    }
+
+    return true;
+}
+
+static void
+recorder_rescale_packet(struct recorder *recorder, AVPacket *packet) {
+    AVStream *ostream = recorder->ctx->streams[0];
+    av_packet_rescale_ts(packet, SCRCPY_TIME_BASE, ostream->time_base);
+}
+
+bool
+recorder_write(struct recorder *recorder, AVPacket *packet) {
+    if (!recorder->header_written) {
+        bool ok = recorder_write_header(recorder, packet);
+        if (!ok) {
+            return false;
+        }
+        recorder->header_written = true;
+    }
+
+    recorder_rescale_packet(recorder, packet);
     return av_write_frame(recorder->ctx, packet) >= 0;
 }

app/src/recorder.h

@@ -1,24 +1,38 @@
 #ifndef RECORDER_H
 #define RECORDER_H
 
+#include <stdbool.h>
 #include <libavformat/avformat.h>
-#include <SDL2/SDL_stdinc.h>
 
 #include "common.h"
 
-struct recorder {
+enum recorder_format {
-    char *filename;
+    RECORDER_FORMAT_MP4 = 1,
-    AVFormatContext *ctx;
+    RECORDER_FORMAT_MKV,
-    struct size declared_frame_size;
 };
 
-SDL_bool recorder_init(struct recorder *recoder, const char *filename,
+struct recorder {
-                       struct size declared_frame_size);
+    char *filename;
-void recorder_destroy(struct recorder *recorder);
+    enum recorder_format format;
+    AVFormatContext *ctx;
+    struct size declared_frame_size;
+    bool header_written;
+};
 
-SDL_bool recorder_open(struct recorder *recorder, AVCodec *input_codec);
+bool
-void recorder_close(struct recorder *recorder);
+recorder_init(struct recorder *recoder, const char *filename,
+              enum recorder_format format, struct size declared_frame_size);
 
-SDL_bool recorder_write(struct recorder *recorder, AVPacket *packet);
+void
+recorder_destroy(struct recorder *recorder);
+
+bool
+recorder_open(struct recorder *recorder, const AVCodec *input_codec);
+
+void
+recorder_close(struct recorder *recorder);
+
+bool
+recorder_write(struct recorder *recorder, AVPacket *packet);
 
 #endif

app/src/scrcpy.c

@@ -9,12 +9,12 @@
 
 #include "command.h"
 #include "common.h"
+#include "compat.h"
 #include "controller.h"
 #include "decoder.h"
 #include "device.h"
 #include "events.h"
 #include "file_handler.h"
-#include "frames.h"
 #include "fps_counter.h"
 #include "input_manager.h"
 #include "log.h"
@@ -23,22 +23,66 @@
 #include "recorder.h"
 #include "screen.h"
 #include "server.h"
+#include "stream.h"
 #include "tiny_xpm.h"
+#include "video_buffer.h"
 
 static struct server server = SERVER_INITIALIZER;
 static struct screen screen = SCREEN_INITIALIZER;
-static struct frames frames;
+static struct video_buffer video_buffer;
+static struct stream stream;
 static struct decoder decoder;
+static struct recorder recorder;
 static struct controller controller;
 static struct file_handler file_handler;
-static struct recorder recorder;
 
 static struct input_manager input_manager = {
     .controller = &controller,
-    .frames = &frames,
+    .video_buffer = &video_buffer,
     .screen = &screen,
 };
 
+// init SDL and set appropriate hints
+static bool
+sdl_init_and_configure(bool display) {
+    uint32_t flags = display ? SDL_INIT_VIDEO : SDL_INIT_EVENTS;
+    if (SDL_Init(flags)) {
+        LOGC("Could not initialize SDL: %s", SDL_GetError());
+        return false;
+    }
+
+    atexit(SDL_Quit);
+
+    if (!display) {
+        return true;
+    }
+
+    // Use the best available scale quality
+    if (!SDL_SetHint(SDL_HINT_RENDER_SCALE_QUALITY, "2")) {
+        LOGW("Could not enable bilinear filtering");
+    }
+
+#ifdef SCRCPY_SDL_HAS_HINT_MOUSE_FOCUS_CLICKTHROUGH
+    // Handle a click to gain focus as any other click
+    if (!SDL_SetHint(SDL_HINT_MOUSE_FOCUS_CLICKTHROUGH, "1")) {
+        LOGW("Could not enable mouse focus clickthrough");
+    }
+#endif
+
+#ifdef SCRCPY_SDL_HAS_HINT_VIDEO_X11_NET_WM_BYPASS_COMPOSITOR
+    // Disable compositor bypassing on X11
+    if (!SDL_SetHint(SDL_HINT_VIDEO_X11_NET_WM_BYPASS_COMPOSITOR, "0")) {
+        LOGW("Could not disable X11 compositor bypass");
+    }
+#endif
+
+    // Do not disable the screensaver when scrcpy is running
+    SDL_EnableScreenSaver();
+
+    return true;
+}
+
+
 #if defined(__APPLE__) || defined(__WINDOWS__)
 # define CONTINUOUS_RESIZING_WORKAROUND
 #endif
@@ -49,8 +93,10 @@ static struct input_manager input_manager = {
 //
 // <https://bugzilla.libsdl.org/show_bug.cgi?id=2077>
 // <https://stackoverflow.com/a/40693139/1987178>
-static int event_watcher(void *data, SDL_Event *event) {
+static int
-    if (event->type == SDL_WINDOWEVENT && event->window.event == SDL_WINDOWEVENT_RESIZED) {
+event_watcher(void *data, SDL_Event *event) {
+    if (event->type == SDL_WINDOWEVENT
+            && event->window.event == SDL_WINDOWEVENT_RESIZED) {
         // called from another thread, not very safe, but it's a workaround!
         screen_render(&screen);
     }
@@ -58,75 +104,117 @@ static int event_watcher(void *data, SDL_Event *event) {
 }
 #endif
 
-static SDL_bool is_apk(const char *file) {
+static bool
+is_apk(const char *file) {
     const char *ext = strrchr(file, '.');
     return ext && !strcmp(ext, ".apk");
 }
 
-static SDL_bool event_loop(void) {
+enum event_result {
+    EVENT_RESULT_CONTINUE,
+    EVENT_RESULT_STOPPED_BY_USER,
+    EVENT_RESULT_STOPPED_BY_EOS,
+};
+
+static enum event_result
+handle_event(SDL_Event *event, bool control) {
+    switch (event->type) {
+        case EVENT_STREAM_STOPPED:
+            LOGD("Video stream stopped");
+            return EVENT_RESULT_STOPPED_BY_EOS;
+        case SDL_QUIT:
+            LOGD("User requested to quit");
+            return EVENT_RESULT_STOPPED_BY_USER;
+        case EVENT_NEW_FRAME:
+            if (!screen.has_frame) {
+                screen.has_frame = true;
+                // this is the very first frame, show the window
+                screen_show_window(&screen);
+            }
+            if (!screen_update_frame(&screen, &video_buffer)) {
+                return false;
+            }
+            break;
+        case SDL_WINDOWEVENT:
+            switch (event->window.event) {
+                case SDL_WINDOWEVENT_EXPOSED:
+                case SDL_WINDOWEVENT_SIZE_CHANGED:
+                    screen_render(&screen);
+                    break;
+            }
+            break;
+        case SDL_TEXTINPUT:
+            if (!control) {
+                break;
+            }
+            input_manager_process_text_input(&input_manager, &event->text);
+            break;
+        case SDL_KEYDOWN:
+        case SDL_KEYUP:
+            // some key events do not interact with the device, so process the
+            // event even if control is disabled
+            input_manager_process_key(&input_manager, &event->key, control);
+            break;
+        case SDL_MOUSEMOTION:
+            if (!control) {
+                break;
+            }
+            input_manager_process_mouse_motion(&input_manager, &event->motion);
+            break;
+        case SDL_MOUSEWHEEL:
+            if (!control) {
+                break;
+            }
+            input_manager_process_mouse_wheel(&input_manager, &event->wheel);
+            break;
+        case SDL_MOUSEBUTTONDOWN:
+        case SDL_MOUSEBUTTONUP:
+            // some mouse events do not interact with the device, so process
+            // the event even if control is disabled
+            input_manager_process_mouse_button(&input_manager, &event->button,
+                                               control);
+            break;
+        case SDL_DROPFILE: {
+            if (!control) {
+                break;
+            }
+            file_handler_action_t action;
+            if (is_apk(event->drop.file)) {
+                action = ACTION_INSTALL_APK;
+            } else {
+                action = ACTION_PUSH_FILE;
+            }
+            file_handler_request(&file_handler, action, event->drop.file);
+            break;
+        }
+    }
+    return EVENT_RESULT_CONTINUE;
+}
+
+static bool
+event_loop(bool display, bool control) {
 #ifdef CONTINUOUS_RESIZING_WORKAROUND
-    SDL_AddEventWatch(event_watcher, NULL);
+    if (display) {
+        SDL_AddEventWatch(event_watcher, NULL);
+    }
 #endif
     SDL_Event event;
     while (SDL_WaitEvent(&event)) {
-        switch (event.type) {
+        enum event_result result = handle_event(&event, control);
-            case EVENT_DECODER_STOPPED:
+        switch (result) {
-                LOGD("Video decoder stopped");
+            case EVENT_RESULT_STOPPED_BY_USER:
-                return SDL_FALSE;
+                return true;
-            case SDL_QUIT:
+            case EVENT_RESULT_STOPPED_BY_EOS:
-                LOGD("User requested to quit");
+                return false;
-                return SDL_TRUE;
+            case EVENT_RESULT_CONTINUE:
-            case EVENT_NEW_FRAME:
-                if (!screen.has_frame) {
-                    screen.has_frame = SDL_TRUE;
-                    // this is the very first frame, show the window
-                    screen_show_window(&screen);
-                }
-                if (!screen_update_frame(&screen, &frames)) {
-                    return SDL_FALSE;
-                }
                 break;
-            case SDL_WINDOWEVENT:
-                switch (event.window.event) {
-                    case SDL_WINDOWEVENT_EXPOSED:
-                    case SDL_WINDOWEVENT_SIZE_CHANGED:
-                        screen_render(&screen);
-                        break;
-                }
-                break;
-            case SDL_TEXTINPUT:
-                input_manager_process_text_input(&input_manager, &event.text);
-                break;
-            case SDL_KEYDOWN:
-            case SDL_KEYUP:
-                input_manager_process_key(&input_manager, &event.key);
-                break;
-            case SDL_MOUSEMOTION:
-                input_manager_process_mouse_motion(&input_manager, &event.motion);
-                break;
-            case SDL_MOUSEWHEEL:
-                input_manager_process_mouse_wheel(&input_manager, &event.wheel);
-                break;
-            case SDL_MOUSEBUTTONDOWN:
-            case SDL_MOUSEBUTTONUP:
-                input_manager_process_mouse_button(&input_manager, &event.button);
-                break;
-            case SDL_DROPFILE: {
-                file_handler_action_t action;
-                if (is_apk(event.drop.file)) {
-                    action = ACTION_INSTALL_APK;
-                } else {
-                    action = ACTION_PUSH_FILE;
-                }
-                file_handler_request(&file_handler, action, event.drop.file);
-                break;
-            }
         }
     }
-    return SDL_FALSE;
+    return false;
 }
 
-static process_t set_show_touches_enabled(const char *serial, SDL_bool enabled) {
+static process_t
+set_show_touches_enabled(const char *serial, bool enabled) {
     const char *value = enabled ? "1" : "0";
     const char *const adb_cmd[] = {
         "shell", "settings", "put", "system", "show_touches", value
@@ -134,134 +222,197 @@ static process_t set_show_touches_enabled(const char *serial, SDL_bool enabled)
     return adb_execute(serial, adb_cmd, ARRAY_LEN(adb_cmd));
 }
 
-static void wait_show_touches(process_t process) {
+static void
+wait_show_touches(process_t process) {
     // reap the process, ignore the result
     process_check_success(process, "show_touches");
 }
 
-SDL_bool scrcpy(const struct scrcpy_options *options) {
+static SDL_LogPriority
-    SDL_bool send_frame_meta = !!options->record_filename;
+sdl_priority_from_av_level(int level) {
+    switch (level) {
+        case AV_LOG_PANIC:
+        case AV_LOG_FATAL:
+            return SDL_LOG_PRIORITY_CRITICAL;
+        case AV_LOG_ERROR:
+            return SDL_LOG_PRIORITY_ERROR;
+        case AV_LOG_WARNING:
+            return SDL_LOG_PRIORITY_WARN;
+        case AV_LOG_INFO:
+            return SDL_LOG_PRIORITY_INFO;
+    }
+    // do not forward others, which are too verbose
+    return 0;
+}
+
+static void
+av_log_callback(void *avcl, int level, const char *fmt, va_list vl) {
+    SDL_LogPriority priority = sdl_priority_from_av_level(level);
+    if (priority == 0) {
+        return;
+    }
+    char *local_fmt = SDL_malloc(strlen(fmt) + 10);
+    if (!local_fmt) {
+        LOGC("Cannot allocate string");
+        return;
+    }
+    // strcpy is safe here, the destination is large enough
+    strcpy(local_fmt, "[FFmpeg] ");
+    strcpy(local_fmt + 9, fmt);
+    SDL_LogMessageV(SDL_LOG_CATEGORY_VIDEO, priority, local_fmt, vl);
+    SDL_free(local_fmt);
+}
+
+bool
+scrcpy(const struct scrcpy_options *options) {
+    bool record = !!options->record_filename;
     if (!server_start(&server, options->serial, options->port,
                       options->max_size, options->bit_rate, options->crop,
-                      send_frame_meta)) {
+                      record)) {
-        return SDL_FALSE;
+        return false;
     }
 
     process_t proc_show_touches = PROCESS_NONE;
-    SDL_bool show_touches_waited;
+    bool show_touches_waited;
     if (options->show_touches) {
         LOGI("Enable show_touches");
-        proc_show_touches = set_show_touches_enabled(options->serial, SDL_TRUE);
+        proc_show_touches = set_show_touches_enabled(options->serial, true);
-        show_touches_waited = SDL_FALSE;
+        show_touches_waited = false;
     }
 
-    SDL_bool ret = SDL_TRUE;
+    bool ret = true;
 
-    if (!sdl_init_and_configure()) {
+    bool display = !options->no_display;
-        ret = SDL_FALSE;
+    bool control = !options->no_control;
+
+    if (!sdl_init_and_configure(display)) {
+        ret = false;
         goto finally_destroy_server;
     }
 
-    socket_t device_socket = server_connect_to(&server);
+    if (!server_connect_to(&server)) {
-    if (device_socket == INVALID_SOCKET) {
         server_stop(&server);
-        ret = SDL_FALSE;
+        ret = false;
         goto finally_destroy_server;
     }
 
     char device_name[DEVICE_NAME_FIELD_LENGTH];
     struct size frame_size;
 
-    // screenrecord does not send frames when the screen content does not change
+    // screenrecord does not send frames when the screen content does not
-    // therefore, we transmit the screen size before the video stream, to be able
+    // change therefore, we transmit the screen size before the video stream,
-    // to init the window immediately
+    // to be able to init the window immediately
-    if (!device_read_info(device_socket, device_name, &frame_size)) {
+    if (!device_read_info(server.video_socket, device_name, &frame_size)) {
         server_stop(&server);
-        ret = SDL_FALSE;
+        ret = false;
         goto finally_destroy_server;
     }
 
-    if (!frames_init(&frames)) {
+    struct decoder *dec = NULL;
-        server_stop(&server);
+    if (display) {
-        ret = SDL_FALSE;
+        if (!video_buffer_init(&video_buffer)) {
-        goto finally_destroy_server;
+            server_stop(&server);
-    }
+            ret = false;
+            goto finally_destroy_server;
+        }
 
-    if (!file_handler_init(&file_handler, server.serial)) {
+        if (control && !file_handler_init(&file_handler, server.serial)) {
-        ret = SDL_FALSE;
+            ret = false;
-        server_stop(&server);
+            server_stop(&server);
-        goto finally_destroy_frames;
+            goto finally_destroy_video_buffer;
+        }
+
+        decoder_init(&decoder, &video_buffer);
+        dec = &decoder;
     }
 
     struct recorder *rec = NULL;
-    if (options->record_filename) {
+    if (record) {
-        if (!recorder_init(&recorder, options->record_filename, frame_size)) {
+        if (!recorder_init(&recorder,
-            ret = SDL_FALSE;
+                           options->record_filename,
+                           options->record_format,
+                           frame_size)) {
+            ret = false;
             server_stop(&server);
             goto finally_destroy_file_handler;
         }
         rec = &recorder;
     }
 
-    decoder_init(&decoder, &frames, device_socket, rec);
+    av_log_set_callback(av_log_callback);
+
+    stream_init(&stream, server.video_socket, dec, rec);
 
     // now we consumed the header values, the socket receives the video stream
-    // start the decoder
+    // start the stream
-    if (!decoder_start(&decoder)) {
+    if (!stream_start(&stream)) {
-        ret = SDL_FALSE;
+        ret = false;
         server_stop(&server);
         goto finally_destroy_recorder;
     }
 
-    if (!controller_init(&controller, device_socket)) {
+    if (display) {
-        ret = SDL_FALSE;
+        if (control) {
-        goto finally_stop_decoder;
+            if (!controller_init(&controller, server.control_socket)) {
-    }
+                ret = false;
+                goto finally_stop_stream;
+            }
 
-    if (!controller_start(&controller)) {
+            if (!controller_start(&controller)) {
-        ret = SDL_FALSE;
+                ret = false;
-        goto finally_destroy_controller;
+                goto finally_destroy_controller;
-    }
+            }
+        }
 
-    if (!screen_init_rendering(&screen, device_name, frame_size)) {
+        if (!screen_init_rendering(&screen, device_name, frame_size,
-        ret = SDL_FALSE;
+                                   options->always_on_top)) {
-        goto finally_stop_and_join_controller;
+            ret = false;
+            goto finally_stop_and_join_controller;
+        }
+
+        if (options->fullscreen) {
+            screen_switch_fullscreen(&screen);
+        }
     }
 
     if (options->show_touches) {
         wait_show_touches(proc_show_touches);
-        show_touches_waited = SDL_TRUE;
+        show_touches_waited = true;
     }
 
-    if (options->fullscreen) {
+    ret = event_loop(display, control);
-        screen_switch_fullscreen(&screen);
-    }
-
-    ret = event_loop();
     LOGD("quit...");
 
     screen_destroy(&screen);
 
 finally_stop_and_join_controller:
-    controller_stop(&controller);
+    if (display && control) {
-    controller_join(&controller);
+        controller_stop(&controller);
+        controller_join(&controller);
+    }
 finally_destroy_controller:
-    controller_destroy(&controller);
+    if (display && control) {
-finally_stop_decoder:
+        controller_destroy(&controller);
-    decoder_stop(&decoder);
+    }
-    // stop the server before decoder_join() to wake up the decoder
+finally_stop_stream:
+    stream_stop(&stream);
+    // stop the server before stream_join() to wake up the stream
     server_stop(&server);
-    decoder_join(&decoder);
+    stream_join(&stream);
-finally_destroy_file_handler:
-    file_handler_stop(&file_handler);
-    file_handler_join(&file_handler);
-    file_handler_destroy(&file_handler);
 finally_destroy_recorder:
-    if (options->record_filename) {
+    if (record) {
         recorder_destroy(&recorder);
     }
-finally_destroy_frames:
+finally_destroy_file_handler:
-    frames_destroy(&frames);
+    if (display && control) {
+        file_handler_stop(&file_handler);
+        file_handler_join(&file_handler);
+        file_handler_destroy(&file_handler);
+    }
+finally_destroy_video_buffer:
+    if (display) {
+        video_buffer_destroy(&video_buffer);
+    }
 finally_destroy_server:
     if (options->show_touches) {
         if (!show_touches_waited) {
@@ -269,7 +420,8 @@ finally_destroy_server:
             wait_show_touches(proc_show_touches);
         }
         LOGI("Disable show_touches");
-        proc_show_touches = set_show_touches_enabled(options->serial, SDL_FALSE);
+        proc_show_touches = set_show_touches_enabled(options->serial,
+                                                     false);
         wait_show_touches(proc_show_touches);
     }
 

app/src/scrcpy.h

@@ -1,19 +1,26 @@
 #ifndef SCRCPY_H
 #define SCRCPY_H
 
-#include <SDL2/SDL_stdinc.h>
+#include <stdbool.h>
+#include <stdint.h>
+#include <recorder.h>
 
 struct scrcpy_options {
     const char *serial;
     const char *crop;
     const char *record_filename;
-    Uint16 port;
+    enum recorder_format record_format;
-    Uint16 max_size;
+    uint16_t port;
-    Uint32 bit_rate;
+    uint16_t max_size;
-    SDL_bool show_touches;
+    uint32_t bit_rate;
-    SDL_bool fullscreen;
+    bool show_touches;
+    bool fullscreen;
+    bool always_on_top;
+    bool no_control;
+    bool no_display;
 };
 
-SDL_bool scrcpy(const struct scrcpy_options *options);
+bool
+scrcpy(const struct scrcpy_options *options);
 
 #endif

app/src/screen.c

@@ -1,43 +1,21 @@
 #include "screen.h"
 
-#include <SDL2/SDL.h>
 #include <string.h>
+#include <SDL2/SDL.h>
 
+#include "common.h"
+#include "compat.h"
 #include "icon.xpm"
 #include "lock_util.h"
 #include "log.h"
 #include "tiny_xpm.h"
+#include "video_buffer.h"
 
 #define DISPLAY_MARGINS 96
 
-SDL_bool sdl_init_and_configure(void) {
-    if (SDL_Init(SDL_INIT_VIDEO)) {
-        LOGC("Could not initialize SDL: %s", SDL_GetError());
-        return SDL_FALSE;
-    }
-
-    atexit(SDL_Quit);
-
-    // Use the best available scale quality
-    if (!SDL_SetHint(SDL_HINT_RENDER_SCALE_QUALITY, "2")) {
-        LOGW("Could not enable bilinear filtering");
-    }
-
-#if SDL_VERSION_ATLEAST(2, 0, 5)
-    // Handle a click to gain focus as any other click
-    if (!SDL_SetHint(SDL_HINT_MOUSE_FOCUS_CLICKTHROUGH, "1")) {
-        LOGW("Could not enable mouse focus clickthrough");
-    }
-#endif
-
-    // Do not disable the screensaver when scrcpy is running
-    SDL_EnableScreenSaver();
-
-    return SDL_TRUE;
-}
-
 // get the window size in a struct size
-static struct size get_native_window_size(SDL_Window *window) {
+static struct size
+get_native_window_size(SDL_Window *window) {
     int width;
     int height;
     SDL_GetWindowSize(window, &width, &height);
@@ -49,7 +27,8 @@ static struct size get_native_window_size(SDL_Window *window) {
 }
 
 // get the windowed window size
-static struct size get_window_size(const struct screen *screen) {
+static struct size
+get_window_size(const struct screen *screen) {
     if (screen->fullscreen) {
         return screen->windowed_window_size;
     }
@@ -57,7 +36,8 @@ static struct size get_window_size(const struct screen *screen) {
 }
 
 // set the window size to be applied when fullscreen is disabled
-static void set_window_size(struct screen *screen, struct size new_size) {
+static void
+set_window_size(struct screen *screen, struct size new_size) {
     // setting the window size during fullscreen is implementation defined,
     // so apply the resize only after fullscreen is disabled
     if (screen->fullscreen) {
@@ -69,28 +49,31 @@ static void set_window_size(struct screen *screen, struct size new_size) {
 }
 
 // get the preferred display bounds (i.e. the screen bounds with some margins)
-static SDL_bool get_preferred_display_bounds(struct size *bounds) {
+static bool
+get_preferred_display_bounds(struct size *bounds) {
     SDL_Rect rect;
-#if SDL_VERSION_ATLEAST(2, 0, 5)
+#ifdef SCRCPY_SDL_HAS_GET_DISPLAY_USABLE_BOUNDS
 # define GET_DISPLAY_BOUNDS(i, r) SDL_GetDisplayUsableBounds((i), (r))
 #else
 # define GET_DISPLAY_BOUNDS(i, r) SDL_GetDisplayBounds((i), (r))
 #endif
     if (GET_DISPLAY_BOUNDS(0, &rect)) {
         LOGW("Could not get display usable bounds: %s", SDL_GetError());
-        return SDL_FALSE;
+        return false;
     }
 
     bounds->width = MAX(0, rect.w - DISPLAY_MARGINS);
     bounds->height = MAX(0, rect.h - DISPLAY_MARGINS);
-    return SDL_TRUE;
+    return true;
 }
 
 // return the optimal size of the window, with the following constraints:
-//  - it attempts to keep at least one dimension of the current_size (i.e. it crops the black borders)
+//  - it attempts to keep at least one dimension of the current_size (i.e. it
+//    crops the black borders)
 //  - it keeps the aspect ratio
 //  - it scales down to make it fit in the display_size
-static struct size get_optimal_size(struct size current_size, struct size frame_size) {
+static struct size
+get_optimal_size(struct size current_size, struct size frame_size) {
     if (frame_size.width == 0 || frame_size.height == 0) {
         // avoid division by 0
         return current_size;
@@ -98,8 +81,8 @@ static struct size get_optimal_size(struct size current_size, struct size frame_
 
     struct size display_size;
     // 32 bits because we need to multiply two 16 bits values
-    Uint32 w;
+    uint32_t w;
-    Uint32 h;
+    uint32_t h;
 
     if (!get_preferred_display_bounds(&display_size)) {
         // cannot get display bounds, do not constraint the size
@@ -110,12 +93,13 @@ static struct size get_optimal_size(struct size current_size, struct size frame_
         h = MIN(current_size.height, display_size.height);
     }
 
-    SDL_bool keep_width = frame_size.width * h > frame_size.height * w;
+    bool keep_width = frame_size.width * h > frame_size.height * w;
     if (keep_width) {
         // remove black borders on top and bottom
         h = frame_size.height * w / frame_size.width;
     } else {
-        // remove black borders on left and right (or none at all if it already fits)
+        // remove black borders on left and right (or none at all if it already
+        // fits)
         w = frame_size.width * h / frame_size.height;
     }
 
@@ -125,78 +109,100 @@ static struct size get_optimal_size(struct size current_size, struct size frame_
 }
 
 // same as get_optimal_size(), but read the current size from the window
-static inline struct size get_optimal_window_size(const struct screen *screen, struct size frame_size) {
+static inline struct size
+get_optimal_window_size(const struct screen *screen, struct size frame_size) {
     struct size current_size = get_window_size(screen);
     return get_optimal_size(current_size, frame_size);
 }
 
 // initially, there is no current size, so use the frame size as current size
-static inline struct size get_initial_optimal_size(struct size frame_size) {
+static inline struct size
+get_initial_optimal_size(struct size frame_size) {
     return get_optimal_size(frame_size, frame_size);
 }
 
-void screen_init(struct screen *screen) {
+void
+screen_init(struct screen *screen) {
     *screen = (struct screen) SCREEN_INITIALIZER;
 }
 
-static inline SDL_Texture *create_texture(SDL_Renderer *renderer, struct size frame_size) {
+static inline SDL_Texture *
-    return SDL_CreateTexture(renderer, SDL_PIXELFORMAT_YV12, SDL_TEXTUREACCESS_STREAMING,
+create_texture(SDL_Renderer *renderer, struct size frame_size) {
+    return SDL_CreateTexture(renderer, SDL_PIXELFORMAT_YV12,
+                             SDL_TEXTUREACCESS_STREAMING,
                              frame_size.width, frame_size.height);
 }
 
-SDL_bool screen_init_rendering(struct screen *screen, const char *device_name, struct size frame_size) {
+bool
+screen_init_rendering(struct screen *screen, const char *device_name,
+                      struct size frame_size, bool always_on_top) {
     screen->frame_size = frame_size;
 
     struct size window_size = get_initial_optimal_size(frame_size);
-    Uint32 window_flags = SDL_WINDOW_HIDDEN | SDL_WINDOW_RESIZABLE;
+    uint32_t window_flags = SDL_WINDOW_HIDDEN | SDL_WINDOW_RESIZABLE;
 #ifdef HIDPI_SUPPORT
     window_flags |= SDL_WINDOW_ALLOW_HIGHDPI;
 #endif
-    screen->window = SDL_CreateWindow(device_name, SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED,
+    if (always_on_top) {
-                                      window_size.width, window_size.height, window_flags);
+#ifdef SCRCPY_SDL_HAS_WINDOW_ALWAYS_ON_TOP
-    if (!screen->window) {
+        window_flags |= SDL_WINDOW_ALWAYS_ON_TOP;
-        LOGC("Could not create window: %s", SDL_GetError());
+#else
-        return SDL_FALSE;
+        LOGW("The 'always on top' flag is not available "
+             "(compile with SDL >= 2.0.5 to enable it)");
+#endif
     }
 
-    screen->renderer = SDL_CreateRenderer(screen->window, -1, SDL_RENDERER_ACCELERATED);
+    screen->window = SDL_CreateWindow(device_name, SDL_WINDOWPOS_UNDEFINED,
+                                      SDL_WINDOWPOS_UNDEFINED,
+                                      window_size.width, window_size.height,
+                                      window_flags);
+    if (!screen->window) {
+        LOGC("Could not create window: %s", SDL_GetError());
+        return false;
+    }
+
+    screen->renderer = SDL_CreateRenderer(screen->window, -1,
+                                          SDL_RENDERER_ACCELERATED);
     if (!screen->renderer) {
         LOGC("Could not create renderer: %s", SDL_GetError());
         screen_destroy(screen);
-        return SDL_FALSE;
+        return false;
     }
 
-    if (SDL_RenderSetLogicalSize(screen->renderer, frame_size.width, frame_size.height)) {
+    if (SDL_RenderSetLogicalSize(screen->renderer, frame_size.width,
+                                 frame_size.height)) {
         LOGE("Could not set renderer logical size: %s", SDL_GetError());
         screen_destroy(screen);
-        return SDL_FALSE;
+        return false;
     }
 
     SDL_Surface *icon = read_xpm(icon_xpm);
-    if (!icon) {
+    if (icon) {
-        LOGE("Could not load icon: %s", SDL_GetError());
+        SDL_SetWindowIcon(screen->window, icon);
-        screen_destroy(screen);
+        SDL_FreeSurface(icon);
-        return SDL_FALSE;
+    } else {
+        LOGW("Could not load icon");
     }
-    SDL_SetWindowIcon(screen->window, icon);
-    SDL_FreeSurface(icon);
 
-    LOGI("Initial texture: %" PRIu16 "x%" PRIu16, frame_size.width, frame_size.height);
+    LOGI("Initial texture: %" PRIu16 "x%" PRIu16, frame_size.width,
+                                                  frame_size.height);
     screen->texture = create_texture(screen->renderer, frame_size);
     if (!screen->texture) {
         LOGC("Could not create texture: %s", SDL_GetError());
         screen_destroy(screen);
-        return SDL_FALSE;
+        return false;
     }
 
-    return SDL_TRUE;
+    return true;
 }
 
-void screen_show_window(struct screen *screen) {
+void
+screen_show_window(struct screen *screen) {
     SDL_ShowWindow(screen->window);
 }
 
-void screen_destroy(struct screen *screen) {
+void
+screen_destroy(struct screen *screen) {
     if (screen->texture) {
         SDL_DestroyTexture(screen->texture);
     }
@@ -209,11 +215,14 @@ void screen_destroy(struct screen *screen) {
 }
 
 // recreate the texture and resize the window if the frame size has changed
-static SDL_bool prepare_for_frame(struct screen *screen, struct size new_frame_size) {
+static bool
-    if (screen->frame_size.width != new_frame_size.width || screen->frame_size.height != new_frame_size.height) {
+prepare_for_frame(struct screen *screen, struct size new_frame_size) {
-        if (SDL_RenderSetLogicalSize(screen->renderer, new_frame_size.width, new_frame_size.height)) {
+    if (screen->frame_size.width != new_frame_size.width
+            || screen->frame_size.height != new_frame_size.height) {
+        if (SDL_RenderSetLogicalSize(screen->renderer, new_frame_size.width,
+                                     new_frame_size.height)) {
             LOGE("Could not set renderer logical size: %s", SDL_GetError());
-            return SDL_FALSE;
+            return false;
         }
 
         // frame dimension changed, destroy texture
@@ -221,61 +230,67 @@ static SDL_bool prepare_for_frame(struct screen *screen, struct size new_frame_s
 
         struct size current_size = get_window_size(screen);
         struct size target_size = {
-            (Uint32) current_size.width * new_frame_size.width / screen->frame_size.width,
+            (uint32_t) current_size.width * new_frame_size.width
-            (Uint32) current_size.height * new_frame_size.height / screen->frame_size.height,
+                    / screen->frame_size.width,
+            (uint32_t) current_size.height * new_frame_size.height
+                    / screen->frame_size.height,
         };
         target_size = get_optimal_size(target_size, new_frame_size);
         set_window_size(screen, target_size);
 
         screen->frame_size = new_frame_size;
 
-        LOGD("New texture: %" PRIu16 "x%" PRIu16,
+        LOGI("New texture: %" PRIu16 "x%" PRIu16,
                      screen->frame_size.width, screen->frame_size.height);
         screen->texture = create_texture(screen->renderer, new_frame_size);
         if (!screen->texture) {
             LOGC("Could not create texture: %s", SDL_GetError());
-            return SDL_FALSE;
+            return false;
         }
     }
 
-    return SDL_TRUE;
+    return true;
 }
 
 // write the frame into the texture
-static void update_texture(struct screen *screen, const AVFrame *frame) {
+static void
+update_texture(struct screen *screen, const AVFrame *frame) {
     SDL_UpdateYUVTexture(screen->texture, NULL,
             frame->data[0], frame->linesize[0],
             frame->data[1], frame->linesize[1],
             frame->data[2], frame->linesize[2]);
 }
 
-SDL_bool screen_update_frame(struct screen *screen, struct frames *frames) {
+bool
-    mutex_lock(frames->mutex);
+screen_update_frame(struct screen *screen, struct video_buffer *vb) {
-    const AVFrame *frame = frames_consume_rendered_frame(frames);
+    mutex_lock(vb->mutex);
+    const AVFrame *frame = video_buffer_consume_rendered_frame(vb);
     struct size new_frame_size = {frame->width, frame->height};
     if (!prepare_for_frame(screen, new_frame_size)) {
-        mutex_unlock(frames->mutex);
+        mutex_unlock(vb->mutex);
-        return SDL_FALSE;
+        return false;
     }
     update_texture(screen, frame);
-    mutex_unlock(frames->mutex);
+    mutex_unlock(vb->mutex);
 
     screen_render(screen);
-    return SDL_TRUE;
+    return true;
 }
 
-void screen_render(struct screen *screen) {
+void
+screen_render(struct screen *screen) {
     SDL_RenderClear(screen->renderer);
     SDL_RenderCopy(screen->renderer, screen->texture, NULL, NULL);
     SDL_RenderPresent(screen->renderer);
 }
 
-void screen_switch_fullscreen(struct screen *screen) {
+void
+screen_switch_fullscreen(struct screen *screen) {
     if (!screen->fullscreen) {
         // going to fullscreen, store the current windowed window size
         screen->windowed_window_size = get_native_window_size(screen->window);
     }
-    Uint32 new_mode = screen->fullscreen ? 0 : SDL_WINDOW_FULLSCREEN_DESKTOP;
+    uint32_t new_mode = screen->fullscreen ? 0 : SDL_WINDOW_FULLSCREEN_DESKTOP;
     if (SDL_SetWindowFullscreen(screen->window, new_mode)) {
         LOGW("Could not switch fullscreen mode: %s", SDL_GetError());
         return;
@@ -284,24 +299,30 @@ void screen_switch_fullscreen(struct screen *screen) {
     screen->fullscreen = !screen->fullscreen;
     if (!screen->fullscreen) {
         // fullscreen disabled, restore expected windowed window size
-        SDL_SetWindowSize(screen->window, screen->windowed_window_size.width, screen->windowed_window_size.height);
+        SDL_SetWindowSize(screen->window, screen->windowed_window_size.width,
+                          screen->windowed_window_size.height);
     }
 
     LOGD("Switched to %s mode", screen->fullscreen ? "fullscreen" : "windowed");
     screen_render(screen);
 }
 
-void screen_resize_to_fit(struct screen *screen) {
+void
+screen_resize_to_fit(struct screen *screen) {
     if (!screen->fullscreen) {
-        struct size optimal_size = get_optimal_window_size(screen, screen->frame_size);
+        struct size optimal_size = get_optimal_window_size(screen,
-        SDL_SetWindowSize(screen->window, optimal_size.width, optimal_size.height);
+                                                           screen->frame_size);
+        SDL_SetWindowSize(screen->window, optimal_size.width,
+                          optimal_size.height);
         LOGD("Resized to optimal size");
     }
 }
 
-void screen_resize_to_pixel_perfect(struct screen *screen) {
+void
+screen_resize_to_pixel_perfect(struct screen *screen) {
     if (!screen->fullscreen) {
-        SDL_SetWindowSize(screen->window, screen->frame_size.width, screen->frame_size.height);
+        SDL_SetWindowSize(screen->window, screen->frame_size.width,
+                          screen->frame_size.height);
         LOGD("Resized to pixel-perfect");
     }
 }

app/src/screen.h

@@ -1,11 +1,13 @@
 #ifndef SCREEN_H
 #define SCREEN_H
 
+#include <stdbool.h>
 #include <SDL2/SDL.h>
 #include <libavformat/avformat.h>
 
 #include "common.h"
-#include "frames.h"
+
+struct video_buffer;
 
 struct screen {
     SDL_Window *window;
@@ -14,8 +16,9 @@ struct screen {
     struct size frame_size;
     //used only in fullscreen mode to know the windowed window size
     struct size windowed_window_size;
-    SDL_bool has_frame;
+    bool has_frame;
-    SDL_bool fullscreen;
+    bool fullscreen;
+    bool no_window;
 };
 
 #define SCREEN_INITIALIZER {  \
@@ -30,40 +33,46 @@ struct screen {
         .width = 0,           \
         .height = 0,          \
     },                        \
-    .has_frame = SDL_FALSE,   \
+    .has_frame = false,   \
-    .fullscreen = SDL_FALSE,  \
+    .fullscreen = false,  \
+    .no_window = false,   \
 }
 
-// init SDL and set appropriate hints
-SDL_bool sdl_init_and_configure(void);
-
 // initialize default values
-void screen_init(struct screen *screen);
+void
+screen_init(struct screen *screen);
 
 // initialize screen, create window, renderer and texture (window is hidden)
-SDL_bool screen_init_rendering(struct screen *screen,
+bool
-                               const char *device_name,
+screen_init_rendering(struct screen *screen, const char *device_name,
-                               struct size frame_size);
+                      struct size frame_size, bool always_on_top);
 
 // show the window
-void screen_show_window(struct screen *screen);
+void
+screen_show_window(struct screen *screen);
 
 // destroy window, renderer and texture (if any)
-void screen_destroy(struct screen *screen);
+void
+screen_destroy(struct screen *screen);
 
 // resize if necessary and write the rendered frame into the texture
-SDL_bool screen_update_frame(struct screen *screen, struct frames *frames);
+bool
+screen_update_frame(struct screen *screen, struct video_buffer *vb);
 
 // render the texture to the renderer
-void screen_render(struct screen *screen);
+void
+screen_render(struct screen *screen);
 
 // switch the fullscreen mode
-void screen_switch_fullscreen(struct screen *screen);
+void
+screen_switch_fullscreen(struct screen *screen);
 
 // resize window to optimal size (remove black borders)
-void screen_resize_to_fit(struct screen *screen);
+void
+screen_resize_to_fit(struct screen *screen);
 
 // resize window to 1:1 (pixel-perfect)
-void screen_resize_to_pixel_perfect(struct screen *screen);
+void
+screen_resize_to_pixel_perfect(struct screen *screen);
 
 #endif

app/src/server.c

@@ -2,7 +2,6 @@
 
 #include <errno.h>
 #include <inttypes.h>
-#include <stdint.h>
 #include <stdio.h>
 #include <SDL2/SDL_assert.h>
 #include <SDL2/SDL_timer.h>
@@ -21,7 +20,8 @@
 
 #define DEVICE_SERVER_PATH "/data/local/tmp/scrcpy-server.jar"
 
-static const char *get_server_path(void) {
+static const char *
+get_server_path(void) {
     const char *server_path = getenv("SCRCPY_SERVER_PATH");
     if (!server_path) {
         server_path = DEFAULT_SERVER_PATH;
@@ -29,52 +29,60 @@ static const char *get_server_path(void) {
     return server_path;
 }
 
-static SDL_bool push_server(const char *serial) {
+static bool
+push_server(const char *serial) {
     process_t process = adb_push(serial, get_server_path(), DEVICE_SERVER_PATH);
     return process_check_success(process, "adb push");
 }
 
-static SDL_bool enable_tunnel_reverse(const char *serial, Uint16 local_port) {
+static bool
+enable_tunnel_reverse(const char *serial, uint16_t local_port) {
     process_t process = adb_reverse(serial, SOCKET_NAME, local_port);
     return process_check_success(process, "adb reverse");
 }
 
-static SDL_bool disable_tunnel_reverse(const char *serial) {
+static bool
+disable_tunnel_reverse(const char *serial) {
     process_t process = adb_reverse_remove(serial, SOCKET_NAME);
     return process_check_success(process, "adb reverse --remove");
 }
 
-static SDL_bool enable_tunnel_forward(const char *serial, Uint16 local_port) {
+static bool
+enable_tunnel_forward(const char *serial, uint16_t local_port) {
     process_t process = adb_forward(serial, local_port, SOCKET_NAME);
     return process_check_success(process, "adb forward");
 }
 
-static SDL_bool disable_tunnel_forward(const char *serial, Uint16 local_port) {
+static bool
+disable_tunnel_forward(const char *serial, uint16_t local_port) {
     process_t process = adb_forward_remove(serial, local_port);
     return process_check_success(process, "adb forward --remove");
 }
 
-static SDL_bool enable_tunnel(struct server *server) {
+static bool
+enable_tunnel(struct server *server) {
     if (enable_tunnel_reverse(server->serial, server->local_port)) {
-        return SDL_TRUE;
+        return true;
     }
 
     LOGW("'adb reverse' failed, fallback to 'adb forward'");
-    server->tunnel_forward = SDL_TRUE;
+    server->tunnel_forward = true;
     return enable_tunnel_forward(server->serial, server->local_port);
 }
 
-static SDL_bool disable_tunnel(struct server *server) {
+static bool
+disable_tunnel(struct server *server) {
     if (server->tunnel_forward) {
         return disable_tunnel_forward(server->serial, server->local_port);
     }
     return disable_tunnel_reverse(server->serial);
 }
 
-static process_t execute_server(const char *serial,
+static process_t
-                                Uint16 max_size, Uint32 bit_rate,
+execute_server(const char *serial,
-                                SDL_bool tunnel_forward, const char *crop,
+               uint16_t max_size, uint32_t bit_rate,
-                                SDL_bool send_frame_meta) {
+               bool tunnel_forward, const char *crop,
+               bool send_frame_meta) {
     char max_size_string[6];
     char bit_rate_string[11];
     sprintf(max_size_string, "%"PRIu16, max_size);
@@ -96,11 +104,13 @@ static process_t execute_server(const char *serial,
 
 #define IPV4_LOCALHOST 0x7F000001
 
-static socket_t listen_on_port(Uint16 port) {
+static socket_t
+listen_on_port(uint16_t port) {
     return net_listen(IPV4_LOCALHOST, port, 1);
 }
 
-static socket_t connect_and_read_byte(Uint16 port) {
+static socket_t
+connect_and_read_byte(uint16_t port) {
     socket_t socket = net_connect(IPV4_LOCALHOST, port);
     if (socket == INVALID_SOCKET) {
         return INVALID_SOCKET;
@@ -109,14 +119,15 @@ static socket_t connect_and_read_byte(Uint16 port) {
     char byte;
     // the connection may succeed even if the server behind the "adb tunnel"
     // is not listening, so read one byte to detect a working connection
-    if (net_recv_all(socket, &byte, 1) != 1) {
+    if (net_recv(socket, &byte, 1) != 1) {
         // the server is not listening yet behind the adb tunnel
         return INVALID_SOCKET;
     }
     return socket;
 }
 
-static socket_t connect_to_server(Uint16 port, Uint32 attempts, Uint32 delay) {
+static socket_t
+connect_to_server(uint16_t port, uint32_t attempts, uint32_t delay) {
     do {
         LOGD("Remaining connection attempts: %d", (int) attempts);
         socket_t socket = connect_and_read_byte(port);
@@ -131,7 +142,8 @@ static socket_t connect_to_server(Uint16 port, Uint32 attempts, Uint32 delay) {
     return INVALID_SOCKET;
 }
 
-static void close_socket(socket_t *socket) {
+static void
+close_socket(socket_t *socket) {
     SDL_assert(*socket != INVALID_SOCKET);
     net_shutdown(*socket, SHUT_RDWR);
     if (!net_close(*socket)) {
@@ -141,30 +153,32 @@ static void close_socket(socket_t *socket) {
     *socket = INVALID_SOCKET;
 }
 
-void server_init(struct server *server) {
+void
+server_init(struct server *server) {
     *server = (struct server) SERVER_INITIALIZER;
 }
 
-SDL_bool server_start(struct server *server, const char *serial,
+bool
-                      Uint16 local_port, Uint16 max_size, Uint32 bit_rate,
+server_start(struct server *server, const char *serial,
-                      const char *crop, SDL_bool send_frame_meta) {
+             uint16_t local_port, uint16_t max_size, uint32_t bit_rate,
+             const char *crop, bool send_frame_meta) {
     server->local_port = local_port;
 
     if (serial) {
         server->serial = SDL_strdup(serial);
         if (!server->serial) {
-            return SDL_FALSE;
+            return false;
         }
     }
 
     if (!push_server(serial)) {
-        SDL_free((void *) server->serial);
+        SDL_free(server->serial);
-        return SDL_FALSE;
+        return false;
     }
 
     if (!enable_tunnel(server)) {
-        SDL_free((void *) server->serial);
+        SDL_free(server->serial);
-        return SDL_FALSE;
+        return false;
     }
 
     // if "adb reverse" does not work (e.g. over "adb connect"), it fallbacks to
@@ -173,15 +187,16 @@ SDL_bool server_start(struct server *server, const char *serial,
         // At the application level, the device part is "the server" because it
         // serves video stream and control. However, at the network level, the
         // client listens and the server connects to the client. That way, the
-        // client can listen before starting the server app, so there is no need to
+        // client can listen before starting the server app, so there is no
-        // try to connect until the server socket is listening on the device.
+        // need to try to connect until the server socket is listening on the
+        // device.
 
         server->server_socket = listen_on_port(local_port);
         if (server->server_socket == INVALID_SOCKET) {
             LOGE("Could not listen on port %" PRIu16, local_port);
             disable_tunnel(server);
-            SDL_free((void *) server->serial);
+            SDL_free(server->serial);
-            return SDL_FALSE;
+            return false;
         }
     }
 
@@ -195,41 +210,57 @@ SDL_bool server_start(struct server *server, const char *serial,
             close_socket(&server->server_socket);
         }
         disable_tunnel(server);
-        SDL_free((void *) server->serial);
+        SDL_free(server->serial);
-        return SDL_FALSE;
+        return false;
     }
 
-    server->tunnel_enabled = SDL_TRUE;
+    server->tunnel_enabled = true;
 
-    return SDL_TRUE;
+    return true;
 }
 
-socket_t server_connect_to(struct server *server) {
+bool
+server_connect_to(struct server *server) {
     if (!server->tunnel_forward) {
-        server->device_socket = net_accept(server->server_socket);
+        server->video_socket = net_accept(server->server_socket);
-    } else {
+        if (server->video_socket == INVALID_SOCKET) {
-        Uint32 attempts = 100;
+            return false;
-        Uint32 delay = 100; // ms
+        }
-        server->device_socket = connect_to_server(server->local_port, attempts, delay);
-    }
 
-    if (server->device_socket == INVALID_SOCKET) {
+        server->control_socket = net_accept(server->server_socket);
-        return INVALID_SOCKET;
+        if (server->control_socket == INVALID_SOCKET) {
-    }
+            // the video_socket will be clean up on destroy
+            return false;
+        }
 
-    if (!server->tunnel_forward) {
         // we don't need the server socket anymore
         close_socket(&server->server_socket);
+    } else {
+        uint32_t attempts = 100;
+        uint32_t delay = 100; // ms
+        server->video_socket =
+            connect_to_server(server->local_port, attempts, delay);
+        if (server->video_socket == INVALID_SOCKET) {
+            return false;
+        }
+
+        // we know that the device is listening, we don't need several attempts
+        server->control_socket =
+            net_connect(IPV4_LOCALHOST, server->local_port);
+        if (server->control_socket == INVALID_SOCKET) {
+            return false;
+        }
     }
 
     // we don't need the adb tunnel anymore
     disable_tunnel(server); // ignore failure
-    server->tunnel_enabled = SDL_FALSE;
+    server->tunnel_enabled = false;
 
-    return server->device_socket;
+    return true;
 }
 
-void server_stop(struct server *server) {
+void
+server_stop(struct server *server) {
     SDL_assert(server->process != PROCESS_NONE);
 
     if (!cmd_terminate(server->process)) {
@@ -245,12 +276,16 @@ void server_stop(struct server *server) {
     }
 }
 
-void server_destroy(struct server *server) {
+void
+server_destroy(struct server *server) {
     if (server->server_socket != INVALID_SOCKET) {
         close_socket(&server->server_socket);
     }
-    if (server->device_socket != INVALID_SOCKET) {
+    if (server->video_socket != INVALID_SOCKET) {
-        close_socket(&server->device_socket);
+        close_socket(&server->video_socket);
     }
-    SDL_free((void *) server->serial);
+    if (server->control_socket != INVALID_SOCKET) {
+        close_socket(&server->control_socket);
+    }
+    SDL_free(server->serial);
 }

app/src/server.h

@@ -1,46 +1,56 @@
 #ifndef SERVER_H
 #define SERVER_H
 
+#include <stdbool.h>
+#include <stdint.h>
+
 #include "command.h"
 #include "net.h"
 
 struct server {
-    const char *serial;
+    char *serial;
     process_t process;
     socket_t server_socket; // only used if !tunnel_forward
-    socket_t device_socket;
+    socket_t video_socket;
-    Uint16 local_port;
+    socket_t control_socket;
-    SDL_bool tunnel_enabled;
+    uint16_t local_port;
-    SDL_bool tunnel_forward; // use "adb forward" instead of "adb reverse"
+    bool tunnel_enabled;
-    SDL_bool send_frame_meta; // request frame PTS to be able to record properly
+    bool tunnel_forward; // use "adb forward" instead of "adb reverse"
+    bool send_frame_meta; // request frame PTS to be able to record properly
 };
 
-#define SERVER_INITIALIZER {              \
+#define SERVER_INITIALIZER {          \
-    .serial = NULL,                       \
+    .serial = NULL,                   \
-    .process = PROCESS_NONE,              \
+    .process = PROCESS_NONE,          \
-    .server_socket = INVALID_SOCKET,      \
+    .server_socket = INVALID_SOCKET,  \
-    .device_socket = INVALID_SOCKET,      \
+    .video_socket = INVALID_SOCKET,   \
-    .local_port = 0,                      \
+    .control_socket = INVALID_SOCKET, \
-    .tunnel_enabled = SDL_FALSE,          \
+    .local_port = 0,                  \
-    .tunnel_forward = SDL_FALSE,          \
+    .tunnel_enabled = false,          \
-    .send_frame_meta = SDL_FALSE,         \
+    .tunnel_forward = false,          \
+    .send_frame_meta = false,         \
 }
 
 // init default values
-void server_init(struct server *server);
+void
+server_init(struct server *server);
 
 // push, enable tunnel et start the server
-SDL_bool server_start(struct server *server, const char *serial,
+bool
-                      Uint16 local_port, Uint16 max_size, Uint32 bit_rate,
+server_start(struct server *server, const char *serial,
-                      const char *crop, SDL_bool send_frame_meta);
+             uint16_t local_port, uint16_t max_size, uint32_t bit_rate,
+             const char *crop, bool send_frame_meta);
 
 // block until the communication with the server is established
-socket_t server_connect_to(struct server *server);
+bool
+server_connect_to(struct server *server);
 
 // disconnect and kill the server process
-void server_stop(struct server *server);
+void
+server_stop(struct server *server);
 
 // close and release sockets
-void server_destroy(struct server *server);
+void
+server_destroy(struct server *server);
 
 #endif

app/src/str_util.c

@@ -3,7 +3,13 @@
 #include <stdlib.h>
 #include <string.h>
 
-size_t xstrncpy(char *dest, const char *src, size_t n) {
+#ifdef _WIN32
+# include <windows.h>
+# include <tchar.h>
+#endif
+
+size_t
+xstrncpy(char *dest, const char *src, size_t n) {
     size_t i;
     for (i = 0; i < n - 1 && src[i] != '\0'; ++i)
         dest[i] = src[i];
@@ -12,7 +18,8 @@ size_t xstrncpy(char *dest, const char *src, size_t n) {
     return src[i] == '\0' ? i : n;
 }
 
-size_t xstrjoin(char *dst, const char *const tokens[], char sep, size_t n) {
+size_t
+xstrjoin(char *dst, const char *const tokens[], char sep, size_t n) {
     const char *const *remaining = tokens;
     const char *token = *remaining++;
     size_t i = 0;
@@ -35,7 +42,8 @@ truncated:
     return n;
 }
 
-char *strquote(const char *src) {
+char *
+strquote(const char *src) {
     size_t len = strlen(src);
     char *quoted = malloc(len + 3);
     if (!quoted) {
@@ -47,3 +55,23 @@ char *strquote(const char *src) {
     quoted[len + 2] = '\0';
     return quoted;
 }
+
+#ifdef _WIN32
+
+wchar_t *
+utf8_to_wide_char(const char *utf8) {
+    int len = MultiByteToWideChar(CP_UTF8, 0, utf8, -1, NULL, 0);
+    if (!len) {
+        return NULL;
+    }
+
+    wchar_t *wide = malloc(len * sizeof(wchar_t));
+    if (!wide) {
+        return NULL;
+    }
+
+    MultiByteToWideChar(CP_UTF8, 0, utf8, -1, wide, len);
+    return wide;
+}
+
+#endif

app/src/str_util.h

@@ -9,15 +9,25 @@
 //  - it does not write useless bytes if strlen(src) < n
 //  - it returns the number of chars actually written (max n-1) if src has
 //    been copied completely, or n if src has been truncated
-size_t xstrncpy(char *dest, const char *src, size_t n);
+size_t
+xstrncpy(char *dest, const char *src, size_t n);
 
 // join tokens by sep into dst
 // returns the number of chars actually written (max n-1) if no trucation
 // occurred, or n if truncated
-size_t xstrjoin(char *dst, const char *const tokens[], char sep, size_t n);
+size_t
+xstrjoin(char *dst, const char *const tokens[], char sep, size_t n);
 
 // quote a string
 // returns the new allocated string, to be freed by the caller
-char *strquote(const char *src);
+char *
+strquote(const char *src);
+
+#ifdef _WIN32
+// convert a UTF-8 string to a wchar_t string
+// returns the new allocated string, to be freed by the caller
+wchar_t *
+utf8_to_wide_char(const char *utf8);
+#endif
 
 #endif

app/src/stream.c

@@ -0,0 +1,286 @@
+#include "stream.h"
+
+#include <libavformat/avformat.h>
+#include <libavutil/time.h>
+#include <SDL2/SDL_assert.h>
+#include <SDL2/SDL_events.h>
+#include <SDL2/SDL_mutex.h>
+#include <SDL2/SDL_thread.h>
+#include <unistd.h>
+
+#include "compat.h"
+#include "config.h"
+#include "buffer_util.h"
+#include "decoder.h"
+#include "events.h"
+#include "lock_util.h"
+#include "log.h"
+#include "recorder.h"
+
+#define BUFSIZE 0x10000
+
+#define HEADER_SIZE 12
+#define NO_PTS UINT64_C(-1)
+
+static struct frame_meta *
+frame_meta_new(uint64_t pts) {
+    struct frame_meta *meta = malloc(sizeof(*meta));
+    if (!meta) {
+        return meta;
+    }
+    meta->pts = pts;
+    meta->next = NULL;
+    return meta;
+}
+
+static void
+frame_meta_delete(struct frame_meta *frame_meta) {
+    free(frame_meta);
+}
+
+static bool
+receiver_state_push_meta(struct receiver_state *state, uint64_t pts) {
+    struct frame_meta *frame_meta = frame_meta_new(pts);
+    if (!frame_meta) {
+        return false;
+    }
+
+    // append to the list
+    // (iterate to find the last item, in practice the list should be tiny)
+    struct frame_meta **p = &state->frame_meta_queue;
+    while (*p) {
+        p = &(*p)->next;
+    }
+    *p = frame_meta;
+    return true;
+}
+
+static uint64_t
+receiver_state_take_meta(struct receiver_state *state) {
+    struct frame_meta *frame_meta = state->frame_meta_queue; // first item
+    SDL_assert(frame_meta); // must not be empty
+    uint64_t pts = frame_meta->pts;
+    state->frame_meta_queue = frame_meta->next; // remove the item
+    frame_meta_delete(frame_meta);
+    return pts;
+}
+
+static int
+read_packet_with_meta(void *opaque, uint8_t *buf, int buf_size) {
+    struct stream *stream = opaque;
+    struct receiver_state *state = &stream->receiver_state;
+
+    // The video stream contains raw packets, without time information. When we
+    // record, we retrieve the timestamps separately, from a "meta" header
+    // added by the server before each raw packet.
+    //
+    // The "meta" header length is 12 bytes:
+    // [. . . . . . . .|. . . .]. . . . . . . . . . . . . . . ...
+    //  <-------------> <-----> <-----------------------------...
+    //        PTS        packet        raw packet
+    //                    size
+    //
+    // It is followed by <packet_size> bytes containing the packet/frame.
+
+    if (!state->remaining) {
+#define HEADER_SIZE 12
+        uint8_t header[HEADER_SIZE];
+        ssize_t r = net_recv_all(stream->socket, header, HEADER_SIZE);
+        if (r == -1) {
+            return AVERROR(errno);
+        }
+        if (r == 0) {
+            return AVERROR_EOF;
+        }
+        // no partial read (net_recv_all())
+        SDL_assert_release(r == HEADER_SIZE);
+
+        uint64_t pts = buffer_read64be(header);
+        state->remaining = buffer_read32be(&header[8]);
+
+        if (pts != NO_PTS && !receiver_state_push_meta(state, pts)) {
+            LOGE("Could not store PTS for recording");
+            // we cannot save the PTS, the recording would be broken
+            return AVERROR(ENOMEM);
+        }
+    }
+
+    SDL_assert(state->remaining);
+
+    if (buf_size > state->remaining) {
+        buf_size = state->remaining;
+    }
+
+    ssize_t r = net_recv(stream->socket, buf, buf_size);
+    if (r == -1) {
+        return AVERROR(errno);
+    }
+    if (r == 0) {
+        return AVERROR_EOF;
+    }
+
+    SDL_assert(state->remaining >= r);
+    state->remaining -= r;
+
+    return r;
+}
+
+static int
+read_raw_packet(void *opaque, uint8_t *buf, int buf_size) {
+    struct stream *stream = opaque;
+    ssize_t r = net_recv(stream->socket, buf, buf_size);
+    if (r == -1) {
+        return AVERROR(errno);
+    }
+    if (r == 0) {
+        return AVERROR_EOF;
+    }
+    return r;
+}
+
+static void
+notify_stopped(void) {
+    SDL_Event stop_event;
+    stop_event.type = EVENT_STREAM_STOPPED;
+    SDL_PushEvent(&stop_event);
+}
+
+static int
+run_stream(void *data) {
+    struct stream *stream = data;
+
+    AVFormatContext *format_ctx = avformat_alloc_context();
+    if (!format_ctx) {
+        LOGC("Could not allocate format context");
+        goto end;
+    }
+
+    unsigned char *buffer = av_malloc(BUFSIZE);
+    if (!buffer) {
+        LOGC("Could not allocate buffer");
+        goto finally_free_format_ctx;
+    }
+
+    // initialize the receiver state
+    stream->receiver_state.frame_meta_queue = NULL;
+    stream->receiver_state.remaining = 0;
+
+    // if recording is enabled, a "header" is sent between raw packets
+    int (*read_packet)(void *, uint8_t *, int) =
+            stream->recorder ? read_packet_with_meta : read_raw_packet;
+    AVIOContext *avio_ctx = avio_alloc_context(buffer, BUFSIZE, 0, stream,
+                                               read_packet, NULL, NULL);
+    if (!avio_ctx) {
+        LOGC("Could not allocate avio context");
+        // avformat_open_input takes ownership of 'buffer'
+        // so only free the buffer before avformat_open_input()
+        av_free(buffer);
+        goto finally_free_format_ctx;
+    }
+
+    format_ctx->pb = avio_ctx;
+
+    if (avformat_open_input(&format_ctx, NULL, NULL, NULL) < 0) {
+        LOGE("Could not open video stream");
+        goto finally_free_avio_ctx;
+    }
+
+    AVCodec *codec = avcodec_find_decoder(AV_CODEC_ID_H264);
+    if (!codec) {
+        LOGE("H.264 decoder not found");
+        goto end;
+    }
+
+    if (stream->decoder && !decoder_open(stream->decoder, codec)) {
+        LOGE("Could not open decoder");
+        goto finally_close_input;
+    }
+
+    if (stream->recorder && !recorder_open(stream->recorder, codec)) {
+        LOGE("Could not open recorder");
+        goto finally_close_input;
+    }
+
+    AVPacket packet;
+    av_init_packet(&packet);
+    packet.data = NULL;
+    packet.size = 0;
+
+    while (!av_read_frame(format_ctx, &packet)) {
+        if (stream->decoder && !decoder_push(stream->decoder, &packet)) {
+            av_packet_unref(&packet);
+            goto quit;
+        }
+
+        if (stream->recorder) {
+            // we retrieve the PTS in order they were received, so they will
+            // be assigned to the correct frame
+            uint64_t pts = receiver_state_take_meta(&stream->receiver_state);
+            packet.pts = pts;
+            packet.dts = pts;
+
+            // no need to rescale with av_packet_rescale_ts(), the timestamps
+            // are in microseconds both in input and output
+            if (!recorder_write(stream->recorder, &packet)) {
+                LOGE("Could not write frame to output file");
+                av_packet_unref(&packet);
+                goto quit;
+            }
+        }
+
+        av_packet_unref(&packet);
+
+        if (avio_ctx->eof_reached) {
+            break;
+        }
+    }
+
+    LOGD("End of frames");
+
+quit:
+    if (stream->recorder) {
+        recorder_close(stream->recorder);
+    }
+finally_close_input:
+    avformat_close_input(&format_ctx);
+finally_free_avio_ctx:
+    av_free(avio_ctx->buffer);
+    av_free(avio_ctx);
+finally_free_format_ctx:
+    avformat_free_context(format_ctx);
+end:
+    notify_stopped();
+    return 0;
+}
+
+void
+stream_init(struct stream *stream, socket_t socket,
+            struct decoder *decoder, struct recorder *recorder) {
+    stream->socket = socket;
+    stream->decoder = decoder,
+    stream->recorder = recorder;
+}
+
+bool
+stream_start(struct stream *stream) {
+    LOGD("Starting stream thread");
+
+    stream->thread = SDL_CreateThread(run_stream, "stream", stream);
+    if (!stream->thread) {
+        LOGC("Could not start stream thread");
+        return false;
+    }
+    return true;
+}
+
+void
+stream_stop(struct stream *stream) {
+    if (stream->decoder) {
+        decoder_interrupt(stream->decoder);
+    }
+}
+
+void
+stream_join(struct stream *stream) {
+    SDL_WaitThread(stream->thread, NULL);
+}

app/src/stream.h

@@ -0,0 +1,43 @@
+#ifndef STREAM_H
+#define STREAM_H
+
+#include <stdbool.h>
+#include <stdint.h>
+#include <SDL2/SDL_thread.h>
+
+#include "net.h"
+
+struct video_buffer;
+
+struct frame_meta {
+    uint64_t pts;
+    struct frame_meta *next;
+};
+
+struct stream {
+    socket_t socket;
+    struct video_buffer *video_buffer;
+    SDL_Thread *thread;
+    struct decoder *decoder;
+    struct recorder *recorder;
+    struct receiver_state {
+        // meta (in order) for frames not consumed yet
+        struct frame_meta *frame_meta_queue;
+        size_t remaining; // remaining bytes to receive for the current frame
+    } receiver_state;
+};
+
+void
+stream_init(struct stream *stream, socket_t socket,
+            struct decoder *decoder, struct recorder *recorder);
+
+bool
+stream_start(struct stream *stream);
+
+void
+stream_stop(struct stream *stream);
+
+void
+stream_join(struct stream *stream);
+
+#endif

app/src/sys/unix/command.c

@@ -11,7 +11,8 @@
 #include <unistd.h>
 #include "log.h"
 
-enum process_result cmd_execute(const char *path, const char *const argv[], pid_t *pid) {
+enum process_result
+cmd_execute(const char *path, const char *const argv[], pid_t *pid) {
     int fd[2];
 
     if (pipe(fd) == -1) {
@@ -72,15 +73,18 @@ end:
     return ret;
 }
 
-SDL_bool cmd_terminate(pid_t pid) {
+bool
+cmd_terminate(pid_t pid) {
     if (pid <= 0) {
-        LOGC("Requested to kill %d, this is an error. Please report the bug.\n", (int) pid);
+        LOGC("Requested to kill %d, this is an error. Please report the bug.\n",
+             (int) pid);
         abort();
     }
     return kill(pid, SIGTERM) != -1;
 }
 
-SDL_bool cmd_simple_wait(pid_t pid, int *exit_code) {
+bool
+cmd_simple_wait(pid_t pid, int *exit_code) {
     int status;
     int code;
     if (waitpid(pid, &status, 0) == -1 || !WIFEXITED(status)) {

app/src/sys/unix/net.c

@@ -1,16 +1,19 @@
 #include "net.h"
 
-# include <unistd.h>
+#include <unistd.h>
 
-SDL_bool net_init(void) {
+bool
+net_init(void) {
     // do nothing
-    return SDL_TRUE;
+    return true;
 }
 
-void net_cleanup(void) {
+void
+net_cleanup(void) {
     // do nothing
 }
 
-SDL_bool net_close(socket_t socket) {
+bool
+net_close(socket_t socket) {
     return !close(socket);
 }

app/src/sys/win/command.c

@@ -4,7 +4,8 @@
 #include "log.h"
 #include "str_util.h"
 
-static int build_cmd(char *cmd, size_t len, const char *const argv[]) {
+static int
+build_cmd(char *cmd, size_t len, const char *const argv[]) {
     // Windows command-line parsing is WTF:
     // <http://daviddeley.com/autohotkey/parameters/parameters.htm#WINPASS>
     // only make it work for this very specific program
@@ -17,8 +18,9 @@ static int build_cmd(char *cmd, size_t len, const char *const argv[]) {
     return 0;
 }
 
-enum process_result cmd_execute(const char *path, const char *const argv[], HANDLE *handle) {
+enum process_result
-    STARTUPINFO si;
+cmd_execute(const char *path, const char *const argv[], HANDLE *handle) {
+    STARTUPINFOW si;
     PROCESS_INFORMATION pi;
     memset(&si, 0, sizeof(si));
     si.cb = sizeof(si);
@@ -29,12 +31,20 @@ enum process_result cmd_execute(const char *path, const char *const argv[], HAND
         return PROCESS_ERROR_GENERIC;
     }
 
+    wchar_t *wide = utf8_to_wide_char(cmd);
+    if (!wide) {
+        LOGC("Cannot allocate wide char string");
+        return PROCESS_ERROR_GENERIC;
+    }
+
 #ifdef WINDOWS_NOCONSOLE
     int flags = CREATE_NO_WINDOW;
 #else
     int flags = 0;
 #endif
-    if (!CreateProcess(NULL, cmd, NULL, NULL, FALSE, flags, NULL, NULL, &si, &pi)) {
+    if (!CreateProcessW(NULL, wide, NULL, NULL, FALSE, flags, NULL, NULL, &si,
+                        &pi)) {
+        free(wide);
         *handle = NULL;
         if (GetLastError() == ERROR_FILE_NOT_FOUND) {
             return PROCESS_ERROR_MISSING_BINARY;
@@ -42,17 +52,21 @@ enum process_result cmd_execute(const char *path, const char *const argv[], HAND
         return PROCESS_ERROR_GENERIC;
     }
 
+    free(wide);
     *handle = pi.hProcess;
     return PROCESS_SUCCESS;
 }
 
-SDL_bool cmd_terminate(HANDLE handle) {
+bool
+cmd_terminate(HANDLE handle) {
     return TerminateProcess(handle, 1) && CloseHandle(handle);
 }
 
-SDL_bool cmd_simple_wait(HANDLE handle, DWORD *exit_code) {
+bool
+cmd_simple_wait(HANDLE handle, DWORD *exit_code) {
     DWORD code;
-    if (WaitForSingleObject(handle, INFINITE) != WAIT_OBJECT_0 || !GetExitCodeProcess(handle, &code)) {
+    if (WaitForSingleObject(handle, INFINITE) != WAIT_OBJECT_0
+            || !GetExitCodeProcess(handle, &code)) {
         // cannot wait or retrieve the exit code
         code = -1; // max value, it's unsigned
     }

app/src/sys/win/net.c

@@ -2,20 +2,23 @@
 
 #include "log.h"
 
-SDL_bool net_init(void) {
+bool
+net_init(void) {
     WSADATA wsa;
     int res = WSAStartup(MAKEWORD(2, 2), &wsa) < 0;
     if (res < 0) {
         LOGC("WSAStartup failed with error %d", res);
-        return SDL_FALSE;
+        return false;
     }
-    return SDL_TRUE;
+    return true;
 }
 
-void net_cleanup(void) {
+void
+net_cleanup(void) {
     WSACleanup();
 }
 
-SDL_bool net_close(socket_t socket) {
+bool
+net_close(socket_t socket) {
     return !closesocket(socket);
 }

app/src/tiny_xpm.c

@@ -1,5 +1,7 @@
 #include "tiny_xpm.h"
 
+#include <stdbool.h>
+#include <stdint.h>
 #include <stdio.h>
 #include <stdlib.h>
 
@@ -7,19 +9,20 @@
 
 struct index {
     char c;
-    Uint32 color;
+    uint32_t color;
 };
 
-static SDL_bool find_color(struct index *index, int len, char c, Uint32 *color) {
+static bool
+find_color(struct index *index, int len, char c, uint32_t *color) {
     // there are typically very few color, so it's ok to iterate over the array
     for (int i = 0; i < len; ++i) {
         if (index[i].c == c) {
             *color = index[i].color;
-            return SDL_TRUE;
+            return true;
         }
     }
     *color = 0;
-    return SDL_FALSE;
+    return false;
 }
 
 // We encounter some problems with SDL2_image on MSYS2 (Windows),
@@ -30,7 +33,8 @@ static SDL_bool find_color(struct index *index, int len, char c, Uint32 *color)
 //
 // Parameter is not "const char *" because XPM formats are generally stored in a
 // (non-const) "char *"
-SDL_Surface *read_xpm(char *xpm[]) {
+SDL_Surface *
+read_xpm(char *xpm[]) {
 #if SDL_ASSERT_LEVEL >= 2
     // patch the XPM to change the icon color in debug mode
     xpm[2] = ".	c #CC00CC";
@@ -69,7 +73,7 @@ SDL_Surface *read_xpm(char *xpm[]) {
     }
 
     // parse image
-    Uint32 *pixels = SDL_malloc(4 * width * height);
+    uint32_t *pixels = SDL_malloc(4 * width * height);
     if (!pixels) {
         LOGE("Could not allocate icon memory");
         return NULL;
@@ -78,29 +82,33 @@ SDL_Surface *read_xpm(char *xpm[]) {
         const char *line = xpm[1 + colors + y];
         for (int x = 0; x < width; ++x) {
             char c = line[x];
-            Uint32 color;
+            uint32_t color;
-            SDL_bool color_found = find_color(index, colors, c, &color);
+            bool color_found = find_color(index, colors, c, &color);
             SDL_assert(color_found);
             pixels[y * width + x] = color;
         }
     }
 
 #if SDL_BYTEORDER == SDL_BIG_ENDIAN
-    Uint32 amask = 0x000000ff;
+    uint32_t amask = 0x000000ff;
-    Uint32 rmask = 0x0000ff00;
+    uint32_t rmask = 0x0000ff00;
-    Uint32 gmask = 0x00ff0000;
+    uint32_t gmask = 0x00ff0000;
-    Uint32 bmask = 0xff000000;
+    uint32_t bmask = 0xff000000;
 #else // little endian, like x86
-    Uint32 amask = 0xff000000;
+    uint32_t amask = 0xff000000;
-    Uint32 rmask = 0x00ff0000;
+    uint32_t rmask = 0x00ff0000;
-    Uint32 gmask = 0x0000ff00;
+    uint32_t gmask = 0x0000ff00;
-    Uint32 bmask = 0x000000ff;
+    uint32_t bmask = 0x000000ff;
 #endif
 
     SDL_Surface *surface = SDL_CreateRGBSurfaceFrom(pixels,
                                                     width, height,
                                                     32, 4 * width,
                                                     rmask, gmask, bmask, amask);
+    if (!surface) {
+        LOGE("Could not create icon surface");
+        return NULL;
+    }
     // make the surface own the raw pixels
     surface->flags &= ~SDL_PREALLOC;
     return surface;

app/src/tiny_xpm.h

@@ -3,6 +3,7 @@
 
 #include <SDL2/SDL.h>
 
-SDL_Surface *read_xpm(char *xpm[]);
+SDL_Surface *
+read_xpm(char *xpm[]);
 
 #endif

app/src/video_buffer.c

@@ -0,0 +1,116 @@
+#include "video_buffer.h"
+
+#include <SDL2/SDL_assert.h>
+#include <SDL2/SDL_mutex.h>
+#include <libavutil/avutil.h>
+#include <libavformat/avformat.h>
+
+#include "config.h"
+#include "lock_util.h"
+#include "log.h"
+
+bool
+video_buffer_init(struct video_buffer *vb) {
+    if (!(vb->decoding_frame = av_frame_alloc())) {
+        goto error_0;
+    }
+
+    if (!(vb->rendering_frame = av_frame_alloc())) {
+        goto error_1;
+    }
+
+    if (!(vb->mutex = SDL_CreateMutex())) {
+        goto error_2;
+    }
+
+#ifndef SKIP_FRAMES
+    if (!(vb->rendering_frame_consumed_cond = SDL_CreateCond())) {
+        SDL_DestroyMutex(vb->mutex);
+        goto error_2;
+    }
+    vb->interrupted = false;
+#endif
+
+    // there is initially no rendering frame, so consider it has already been
+    // consumed
+    vb->rendering_frame_consumed = true;
+    fps_counter_init(&vb->fps_counter);
+
+    return true;
+
+error_2:
+    av_frame_free(&vb->rendering_frame);
+error_1:
+    av_frame_free(&vb->decoding_frame);
+error_0:
+    return false;
+}
+
+void
+video_buffer_destroy(struct video_buffer *vb) {
+#ifndef SKIP_FRAMES
+    SDL_DestroyCond(vb->rendering_frame_consumed_cond);
+#endif
+    SDL_DestroyMutex(vb->mutex);
+    av_frame_free(&vb->rendering_frame);
+    av_frame_free(&vb->decoding_frame);
+}
+
+static void
+video_buffer_swap_frames(struct video_buffer *vb) {
+    AVFrame *tmp = vb->decoding_frame;
+    vb->decoding_frame = vb->rendering_frame;
+    vb->rendering_frame = tmp;
+}
+
+void
+video_buffer_offer_decoded_frame(struct video_buffer *vb,
+                                 bool *previous_frame_skipped) {
+    mutex_lock(vb->mutex);
+#ifndef SKIP_FRAMES
+    // if SKIP_FRAMES is disabled, then the decoder must wait for the current
+    // frame to be consumed
+    while (!vb->rendering_frame_consumed && !vb->interrupted) {
+        cond_wait(vb->rendering_frame_consumed_cond, vb->mutex);
+    }
+#else
+    if (vb->fps_counter.started && !vb->rendering_frame_consumed) {
+        fps_counter_add_skipped_frame(&vb->fps_counter);
+    }
+#endif
+
+    video_buffer_swap_frames(vb);
+
+    *previous_frame_skipped = !vb->rendering_frame_consumed;
+    vb->rendering_frame_consumed = false;
+
+    mutex_unlock(vb->mutex);
+}
+
+const AVFrame *
+video_buffer_consume_rendered_frame(struct video_buffer *vb) {
+    SDL_assert(!vb->rendering_frame_consumed);
+    vb->rendering_frame_consumed = true;
+    if (vb->fps_counter.started) {
+        fps_counter_add_rendered_frame(&vb->fps_counter);
+    }
+#ifndef SKIP_FRAMES
+    // if SKIP_FRAMES is disabled, then notify the decoder the current frame is
+    // consumed, so that it may push a new one
+    cond_signal(vb->rendering_frame_consumed_cond);
+#endif
+    return vb->rendering_frame;
+}
+
+void
+video_buffer_interrupt(struct video_buffer *vb) {
+#ifdef SKIP_FRAMES
+    (void) vb; // unused
+#else
+    mutex_lock(vb->mutex);
+    vb->interrupted = true;
+    mutex_unlock(vb->mutex);
+    // wake up blocking wait
+    cond_signal(vb->rendering_frame_consumed_cond);
+#endif
+}

app/src/video_buffer.h

@@ -1,8 +1,8 @@
-#ifndef FRAMES_H
+#ifndef VIDEO_BUFFER_H
-#define FRAMES_H
+#define VIDEO_BUFFER_H
 
+#include <stdbool.h>
 #include <SDL2/SDL_mutex.h>
-#include <SDL2/SDL_stdinc.h>
 
 #include "config.h"
 #include "fps_counter.h"
@@ -10,33 +10,40 @@
 // forward declarations
 typedef struct AVFrame AVFrame;
 
-struct frames {
+struct video_buffer {
     AVFrame *decoding_frame;
     AVFrame *rendering_frame;
     SDL_mutex *mutex;
 #ifndef SKIP_FRAMES
-    SDL_bool stopped;
+    bool interrupted;
     SDL_cond *rendering_frame_consumed_cond;
 #endif
-    SDL_bool rendering_frame_consumed;
+    bool rendering_frame_consumed;
     struct fps_counter fps_counter;
 };
 
-SDL_bool frames_init(struct frames *frames);
+bool
-void frames_destroy(struct frames *frames);
+video_buffer_init(struct video_buffer *vb);
 
-// set the decoder frame as ready for rendering
+void
+video_buffer_destroy(struct video_buffer *vb);
+
+// set the decoded frame as ready for rendering
 // this function locks frames->mutex during its execution
-// returns true if the previous frame had been consumed
+// the output flag is set to report whether the previous frame has been skipped
-SDL_bool frames_offer_decoded_frame(struct frames *frames);
+void
+video_buffer_offer_decoded_frame(struct video_buffer *vb,
+                                 bool *previous_frame_skipped);
 
 // mark the rendering frame as consumed and return it
 // MUST be called with frames->mutex locked!!!
 // the caller is expected to render the returned frame to some texture before
 // unlocking frames->mutex
-const AVFrame *frames_consume_rendered_frame(struct frames *frames);
+const AVFrame *
+video_buffer_consume_rendered_frame(struct video_buffer *vb);
 
 // wake up and avoid any blocking call
-void frames_stop(struct frames *frames);
+void
+video_buffer_interrupt(struct video_buffer *vb);
 
 #endif

app/tests/test_control_event_queue.c

@@ -5,21 +5,21 @@
 
 static void test_control_event_queue_empty(void) {
     struct control_event_queue queue;
-    SDL_bool init_ok = control_event_queue_init(&queue);
+    bool init_ok = control_event_queue_init(&queue);
     assert(init_ok);
 
     assert(control_event_queue_is_empty(&queue));
 
     struct control_event dummy_event;
-    SDL_bool push_ok = control_event_queue_push(&queue, &dummy_event);
+    bool push_ok = control_event_queue_push(&queue, &dummy_event);
     assert(push_ok);
     assert(!control_event_queue_is_empty(&queue));
 
-    SDL_bool take_ok = control_event_queue_take(&queue, &dummy_event);
+    bool take_ok = control_event_queue_take(&queue, &dummy_event);
     assert(take_ok);
     assert(control_event_queue_is_empty(&queue));
 
-    SDL_bool take_empty_ok = control_event_queue_take(&queue, &dummy_event);
+    bool take_empty_ok = control_event_queue_take(&queue, &dummy_event);
     assert(!take_empty_ok); // the queue is empty
 
     control_event_queue_destroy(&queue);
@@ -27,7 +27,7 @@ static void test_control_event_queue_empty(void) {
 
 static void test_control_event_queue_full(void) {
     struct control_event_queue queue;
-    SDL_bool init_ok = control_event_queue_init(&queue);
+    bool init_ok = control_event_queue_init(&queue);
     assert(init_ok);
 
     assert(!control_event_queue_is_full(&queue));
@@ -36,7 +36,7 @@ static void test_control_event_queue_full(void) {
     // fill the queue
     while (control_event_queue_push(&queue, &dummy_event));
 
-    SDL_bool take_ok = control_event_queue_take(&queue, &dummy_event);
+    bool take_ok = control_event_queue_take(&queue, &dummy_event);
     assert(take_ok);
     assert(!control_event_queue_is_full(&queue));
 
@@ -45,7 +45,7 @@ static void test_control_event_queue_full(void) {
 
 static void test_control_event_queue_push_take(void) {
     struct control_event_queue queue;
-    SDL_bool init_ok = control_event_queue_init(&queue);
+    bool init_ok = control_event_queue_init(&queue);
     assert(init_ok);
 
     struct control_event event = {
@@ -57,7 +57,7 @@ static void test_control_event_queue_push_take(void) {
         },
     };
 
-    SDL_bool push1_ok = control_event_queue_push(&queue, &event);
+    bool push1_ok = control_event_queue_push(&queue, &event);
     assert(push1_ok);
 
     event = (struct control_event) {
@@ -67,11 +67,11 @@ static void test_control_event_queue_push_take(void) {
         },
     };
 
-    SDL_bool push2_ok = control_event_queue_push(&queue, &event);
+    bool push2_ok = control_event_queue_push(&queue, &event);
     assert(push2_ok);
 
     // overwrite event
-    SDL_bool take1_ok = control_event_queue_take(&queue, &event);
+    bool take1_ok = control_event_queue_take(&queue, &event);
     assert(take1_ok);
     assert(event.type == CONTROL_EVENT_TYPE_KEYCODE);
     assert(event.keycode_event.action == AKEY_EVENT_ACTION_DOWN);
@@ -79,7 +79,7 @@ static void test_control_event_queue_push_take(void) {
     assert(event.keycode_event.metastate == (AMETA_CTRL_LEFT_ON | AMETA_CTRL_ON));
 
     // overwrite event
-    SDL_bool take2_ok = control_event_queue_take(&queue, &event);
+    bool take2_ok = control_event_queue_take(&queue, &event);
     assert(take2_ok);
     assert(event.type == CONTROL_EVENT_TYPE_TEXT);
     assert(!strcmp(event.text_event.text, "abc"));

app/tests/test_control_event_serialize.c

@@ -49,13 +49,14 @@ static void test_serialize_text_event(void) {
 static void test_serialize_long_text_event(void) {
     struct control_event event;
     event.type = CONTROL_EVENT_TYPE_TEXT;
-    char text[TEXT_MAX_LENGTH];
+    char text[TEXT_MAX_LENGTH + 1];
     memset(text, 'a', sizeof(text));
+    text[TEXT_MAX_LENGTH] = '\0';
     event.text_event.text = text;
 
     unsigned char buf[SERIALIZED_EVENT_MAX_SIZE];
     int size = control_event_serialize(&event, buf);
-    assert(size == 3 + sizeof(text));
+    assert(size == 3 + TEXT_MAX_LENGTH);
 
     unsigned char expected[3 + TEXT_MAX_LENGTH];
     expected[0] = 0x01; // CONTROL_EVENT_TYPE_KEYCODE
@@ -87,13 +88,13 @@ static void test_serialize_mouse_event(void) {
 
     unsigned char buf[SERIALIZED_EVENT_MAX_SIZE];
     int size = control_event_serialize(&event, buf);
-    assert(size == 14);
+    assert(size == 18);
 
     const unsigned char expected[] = {
         0x02, // CONTROL_EVENT_TYPE_MOUSE
         0x00, // AKEY_EVENT_ACTION_DOWN
         0x00, 0x00, 0x00, 0x01, // AMOTION_EVENT_BUTTON_PRIMARY
-        0x01, 0x04, 0x04, 0x02, // 260 1026
+        0x00, 0x00, 0x01, 0x04, 0x00, 0x00, 0x04, 0x02, // 260 1026
         0x04, 0x38, 0x07, 0x80, // 1080 1920
     };
     assert(!memcmp(buf, expected, sizeof(expected)));
@@ -120,11 +121,11 @@ static void test_serialize_scroll_event(void) {
 
     unsigned char buf[SERIALIZED_EVENT_MAX_SIZE];
     int size = control_event_serialize(&event, buf);
-    assert(size == 17);
+    assert(size == 21);
 
     const unsigned char expected[] = {
         0x03, // CONTROL_EVENT_TYPE_SCROLL
-        0x01, 0x04, 0x04, 0x02, // 260 1026
+        0x00, 0x00, 0x01, 0x04, 0x00, 0x00, 0x04, 0x02, // 260 1026
         0x04, 0x38, 0x07, 0x80, // 1080 1920
         0x00, 0x00, 0x00, 0x01, // 1
         0xFF, 0xFF, 0xFF, 0xFF, // -1

build.gradle

@@ -7,7 +7,7 @@ buildscript {
         jcenter()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:3.1.1'
+        classpath 'com.android.tools.build:gradle:3.3.0'
 
         // NOTE: Do not place your application dependencies here; they belong
         // in the individual module build.gradle files

gradle/wrapper/gradle-wrapper.properties

@@ -1,6 +1,6 @@
-#Mon Jun 04 11:48:32 CEST 2018
+#Thu Apr 18 11:45:59 CEST 2019
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-4.4-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-4.10.1-all.zip

meson.build

@@ -1,5 +1,5 @@
 project('scrcpy', 'c',
-        version: '1.6',
+        version: '1.8',
         meson_version: '>= 0.37',
         default_options: 'c_std=c11')
 

release.sh

@@ -0,0 +1,44 @@
+#!/bin/bash
+set -e
+
+# test locally
+TESTDIR=build_test
+rm -rf "$TESTDIR"
+# run client tests with ASAN enabled
+meson "$TESTDIR" -Db_sanitize=address
+ninja -C"$TESTDIR" test
+
+# test server
+GRADLE=${GRADLE:-./gradlew}
+$GRADLE -p server check
+
+BUILDDIR=build_release
+rm -rf "$BUILDDIR"
+meson "$BUILDDIR" --buildtype release --strip -Db_lto=true
+cd "$BUILDDIR"
+ninja
+cd -
+
+# build Windows releases
+make -f Makefile.CrossWindows
+
+# the generated server must be the same everywhere
+cmp "$BUILDDIR/server/scrcpy-server.jar" dist/scrcpy-win32/scrcpy-server.jar
+cmp "$BUILDDIR/server/scrcpy-server.jar" dist/scrcpy-win64/scrcpy-server.jar
+
+# get version name
+TAG=$(git describe --tags --always)
+
+# create release directory
+mkdir -p "release-$TAG"
+cp "$BUILDDIR/server/scrcpy-server.jar" "release-$TAG/scrcpy-server-$TAG.jar"
+cp "dist/scrcpy-win32-$TAG.zip" "release-$TAG/"
+cp "dist/scrcpy-win64-$TAG.zip" "release-$TAG/"
+
+# generate checksums
+cd "release-$TAG"
+sha256sum "scrcpy-server-$TAG.jar" \
+          "scrcpy-win32-$TAG.zip" \
+          "scrcpy-win64-$TAG.zip" > SHA256SUMS.txt
+
+echo "Release generated in release-$TAG/"

server/build.gradle

@@ -6,8 +6,8 @@ android {
         applicationId "com.genymobile.scrcpy"
         minSdkVersion 21
         targetSdkVersion 27
-        versionCode 7
+        versionCode 9
-        versionName "1.6"
+        versionName "1.8"
         testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
     }
     buildTypes {

server/meson.build

@@ -10,6 +10,10 @@ if prebuilt_server == ''
                   install: true,
                   install_dir: 'share/scrcpy')
 else
+    if not prebuilt_server.startswith('/')
+        # relative path needs some trick
+        prebuilt_server = meson.source_root() + '/' + prebuilt_server
+    endif
     custom_target('scrcpy-server-prebuilt',
                   input: prebuilt_server,
                   output: 'scrcpy-server.jar',

server/src/main/java/com/genymobile/scrcpy/ControlEvent.java

@@ -12,6 +12,8 @@ public final class ControlEvent {
     public static final int TYPE_COMMAND = 4;
 
     public static final int COMMAND_BACK_OR_SCREEN_ON = 0;
+    public static final int COMMAND_EXPAND_NOTIFICATION_PANEL = 1;
+    public static final int COMMAND_COLLAPSE_NOTIFICATION_PANEL = 2;
 
     private int type;
     private String text;

server/src/main/java/com/genymobile/scrcpy/ControlEventReader.java

@@ -9,8 +9,8 @@ import java.nio.charset.StandardCharsets;
 public class ControlEventReader {
 
     private static final int KEYCODE_PAYLOAD_LENGTH = 9;
-    private static final int MOUSE_PAYLOAD_LENGTH = 13;
+    private static final int MOUSE_PAYLOAD_LENGTH = 17;
-    private static final int SCROLL_PAYLOAD_LENGTH = 16;
+    private static final int SCROLL_PAYLOAD_LENGTH = 20;
     private static final int COMMAND_PAYLOAD_LENGTH = 1;
 
     public static final int TEXT_MAX_LENGTH = 300;

server/src/main/java/com/genymobile/scrcpy/DesktopConnection.java

@@ -16,16 +16,20 @@ public final class DesktopConnection implements Closeable {
 
     private static final String SOCKET_NAME = "scrcpy";
 
-    private final LocalSocket socket;
+    private final LocalSocket videoSocket;
-    private final InputStream inputStream;
+    private final FileDescriptor videoFd;
-    private final FileDescriptor fd;
+
+    private final LocalSocket controlSocket;
+    private final InputStream controlInputStream;
+
 
     private final ControlEventReader reader = new ControlEventReader();
 
-    private DesktopConnection(LocalSocket socket) throws IOException {
+    private DesktopConnection(LocalSocket videoSocket, LocalSocket controlSocket) throws IOException {
-        this.socket = socket;
+        this.videoSocket = videoSocket;
-        inputStream = socket.getInputStream();
+        this.controlSocket = controlSocket;
-        fd = socket.getFileDescriptor();
+        controlInputStream = controlSocket.getInputStream();
+        videoFd = videoSocket.getFileDescriptor();
     }
 
     private static LocalSocket connect(String abstractName) throws IOException {
@@ -44,25 +48,46 @@ public final class DesktopConnection implements Closeable {
     }
 
     public static DesktopConnection open(Device device, boolean tunnelForward) throws IOException {
-        LocalSocket socket;
+        LocalSocket videoSocket;
+        LocalSocket controlSocket;
         if (tunnelForward) {
-            socket = listenAndAccept(SOCKET_NAME);
+            LocalServerSocket localServerSocket = new LocalServerSocket(SOCKET_NAME);
-            // send one byte so the client may read() to detect a connection error
+            try {
-            socket.getOutputStream().write(0);
+                videoSocket = localServerSocket.accept();
+                // send one byte so the client may read() to detect a connection error
+                videoSocket.getOutputStream().write(0);
+                try {
+                    controlSocket = localServerSocket.accept();
+                } catch (IOException | RuntimeException e) {
+                    videoSocket.close();
+                    throw e;
+                }
+            } finally {
+                localServerSocket.close();
+            }
         } else {
-            socket = connect(SOCKET_NAME);
+            videoSocket = connect(SOCKET_NAME);
+            try {
+                controlSocket = connect(SOCKET_NAME);
+            } catch (IOException | RuntimeException e) {
+                videoSocket.close();
+                throw e;
+            }
         }
 
-        DesktopConnection connection = new DesktopConnection(socket);
+        DesktopConnection connection = new DesktopConnection(videoSocket, controlSocket);
         Size videoSize = device.getScreenInfo().getVideoSize();
         connection.send(Device.getDeviceName(), videoSize.getWidth(), videoSize.getHeight());
         return connection;
     }
 
     public void close() throws IOException {
-        socket.shutdownInput();
+        videoSocket.shutdownInput();
-        socket.shutdownOutput();
+        videoSocket.shutdownOutput();
-        socket.close();
+        videoSocket.close();
+        controlSocket.shutdownInput();
+        controlSocket.shutdownOutput();
+        controlSocket.close();
     }
 
     @SuppressWarnings("checkstyle:MagicNumber")
@@ -78,17 +103,17 @@ public final class DesktopConnection implements Closeable {
         buffer[DEVICE_NAME_FIELD_LENGTH + 1] = (byte) width;
         buffer[DEVICE_NAME_FIELD_LENGTH + 2] = (byte) (height >> 8);
         buffer[DEVICE_NAME_FIELD_LENGTH + 3] = (byte) height;
-        IO.writeFully(fd, buffer, 0, buffer.length);
+        IO.writeFully(videoFd, buffer, 0, buffer.length);
     }
 
-    public FileDescriptor getFd() {
+    public FileDescriptor getVideoFd() {
-        return fd;
+        return videoFd;
     }
 
     public ControlEvent receiveControlEvent() throws IOException {
         ControlEvent event = reader.next();
         while (event == null) {
-            reader.readFrom(inputStream);
+            reader.readFrom(controlInputStream);
             event = reader.next();
         }
         return event;

server/src/main/java/com/genymobile/scrcpy/Device.java

@@ -132,6 +132,14 @@ public final class Device {
         this.rotationListener = rotationListener;
     }
 
+    public void expandNotificationPanel() {
+        serviceManager.getStatusBarManager().expandNotificationsPanel();
+    }
+
+    public void collapsePanels() {
+        serviceManager.getStatusBarManager().collapsePanels();
+    }
+
     static Rect flipRect(Rect crop) {
         return new Rect(crop.top, crop.left, crop.bottom, crop.right);
     }

server/src/main/java/com/genymobile/scrcpy/EventController.java

@@ -104,13 +104,16 @@ public class EventController {
         return true;
     }
 
-    private boolean injectText(String text) {
+    private int injectText(String text) {
+        int successCount = 0;
         for (char c : text.toCharArray()) {
             if (!injectChar(c)) {
-                return false;
+                Ln.w("Could not inject char u+" + String.format("%04x", (int) c));
+                continue;
             }
+            successCount++;
         }
-        return true;
+        return successCount;
     }
 
     private boolean injectMouse(int action, int buttons, Position position) {
@@ -172,6 +175,12 @@ public class EventController {
         switch (action) {
             case ControlEvent.COMMAND_BACK_OR_SCREEN_ON:
                 return pressBackOrTurnScreenOn();
+            case ControlEvent.COMMAND_EXPAND_NOTIFICATION_PANEL:
+                device.expandNotificationPanel();
+                return true;
+            case ControlEvent.COMMAND_COLLAPSE_NOTIFICATION_PANEL:
+                device.collapsePanels();
+                return true;
             default:
                 Ln.w("Unsupported command: " + action);
         }

server/src/main/java/com/genymobile/scrcpy/IO.java

@@ -8,7 +8,7 @@ import java.io.FileDescriptor;
 import java.io.IOException;
 import java.nio.ByteBuffer;
 
-public class IO {
+public final class IO {
     private IO() {
         // not instantiable
     }

server/src/main/java/com/genymobile/scrcpy/Ln.java

@@ -52,7 +52,13 @@ public final class Ln {
         if (isEnabled(Level.ERROR)) {
             Log.e(TAG, message, throwable);
             System.out.println("ERROR: " + message);
-            throwable.printStackTrace();
+            if (throwable != null) {
+                throwable.printStackTrace();
+            }
         }
     }
+
+    public static void e(String message) {
+        e(message, null);
+    }
 }

server/src/main/java/com/genymobile/scrcpy/ScreenEncoder.java

@@ -3,7 +3,6 @@ package com.genymobile.scrcpy;
 import com.genymobile.scrcpy.wrappers.SurfaceControl;
 
 import android.graphics.Rect;
-import android.media.MediaMuxer;
 import android.media.MediaCodec;
 import android.media.MediaCodecInfo;
 import android.media.MediaFormat;
@@ -71,8 +70,9 @@ public class ScreenEncoder implements Device.RotationListener {
                 codec.start();
                 try {
                     alive = encode(codec, fd);
-                } finally {
+                    // do not call stop() on exception, it would trigger an IllegalStateException
                     codec.stop();
+                } finally {
                     destroyDisplay(display);
                     codec.release();
                     surface.release();
@@ -87,7 +87,6 @@ public class ScreenEncoder implements Device.RotationListener {
         boolean eof = false;
         MediaCodec.BufferInfo bufferInfo = new MediaCodec.BufferInfo();
 
-
         while (!consumeRotationChange() && !eof) {
             int outputBufferId = codec.dequeueOutputBuffer(bufferInfo, -1);
             eof = (bufferInfo.flags & MediaCodec.BUFFER_FLAG_END_OF_STREAM) != 0;

server/src/main/java/com/genymobile/scrcpy/Server.java

@@ -4,7 +4,6 @@ import android.graphics.Rect;
 
 import java.io.File;
 import java.io.IOException;
-import java.util.Arrays;
 
 public final class Server {
 
@@ -25,7 +24,7 @@ public final class Server {
 
             try {
                 // synchronous
-                screenEncoder.streamScreen(device, connection.getFd());
+                screenEncoder.streamScreen(device, connection.getVideoFd());
             } catch (IOException e) {
                 // this is expected on close
                 Ln.d("Screen streaming stopped");
@@ -49,8 +48,9 @@ public final class Server {
 
     @SuppressWarnings("checkstyle:MagicNumber")
     private static Options createOptions(String... args) {
-        if (args.length != 5)
+        if (args.length != 5) {
             throw new IllegalArgumentException("Expecting 5 parameters");
+        }
 
         Options options = new Options();
 
@@ -73,6 +73,7 @@ public final class Server {
         return options;
     }
 
+    @SuppressWarnings("checkstyle:MagicNumber")
     private static Rect parseCrop(String crop) {
         if ("-".equals(crop)) {
             return null;

server/src/main/java/com/genymobile/scrcpy/wrappers/ServiceManager.java

@@ -14,6 +14,7 @@ public final class ServiceManager {
     private DisplayManager displayManager;
     private InputManager inputManager;
     private PowerManager powerManager;
+    private StatusBarManager statusBarManager;
 
     public ServiceManager() {
         try {
@@ -60,4 +61,11 @@ public final class ServiceManager {
         }
         return powerManager;
     }
+
+    public StatusBarManager getStatusBarManager() {
+        if (statusBarManager == null) {
+            statusBarManager = new StatusBarManager(getService("statusbar", "com.android.internal.statusbar.IStatusBarService"));
+        }
+        return statusBarManager;
+    }
 }

server/src/main/java/com/genymobile/scrcpy/wrappers/StatusBarManager.java

@@ -0,0 +1,51 @@
+package com.genymobile.scrcpy.wrappers;
+
+import android.os.IInterface;
+
+import com.genymobile.scrcpy.Ln;
+
+import java.lang.reflect.InvocationTargetException;
+import java.lang.reflect.Method;
+
+public class StatusBarManager {
+
+    private final IInterface manager;
+    private Method expandNotificationsPanelMethod;
+    private Method collapsePanelsMethod;
+
+    public StatusBarManager(IInterface manager) {
+        this.manager = manager;
+    }
+
+    public void expandNotificationsPanel() {
+        if (expandNotificationsPanelMethod == null) {
+            try {
+                expandNotificationsPanelMethod = manager.getClass().getMethod("expandNotificationsPanel");
+            } catch (NoSuchMethodException e) {
+                Ln.e("ServiceBarManager.expandNotificationsPanel() is not available on this device");
+                return;
+            }
+        }
+        try {
+            expandNotificationsPanelMethod.invoke(manager);
+        } catch (InvocationTargetException | IllegalAccessException e) {
+            Ln.e("Cannot invoke ServiceBarManager.expandNotificationsPanel()", e);
+        }
+    }
+
+    public void collapsePanels() {
+        if (collapsePanelsMethod == null) {
+            try {
+                collapsePanelsMethod = manager.getClass().getMethod("collapsePanels");
+            } catch (NoSuchMethodException e) {
+                Ln.e("ServiceBarManager.collapsePanels() is not available on this device");
+                return;
+            }
+        }
+        try {
+            collapsePanelsMethod.invoke(manager);
+        } catch (InvocationTargetException | IllegalAccessException e) {
+            Ln.e("Cannot invoke ServiceBarManager.collapsePanels()", e);
+        }
+    }
+}