update-on-event

Return specific error for missing adb binary on Windows

Makefile.CrossWindows

@@ -38,7 +38,8 @@ release: clean zip-win32 zip-win64 sums
 
 clean:
 	$(GRADLE) clean
-	rm -rf "$(SERVER_BUILD_DIR)" "$(WIN32_BUILD_DIR)" "$(WIN64_BUILD_DIR)" "$(DIST)"
+	rm -rf "$(SERVER_BUILD_DIR)" "$(WIN32_BUILD_DIR)" "$(WIN64_BUILD_DIR)" \
+		   "$(WIN32_NOCONSOLE_BUILD_DIR)" "$(WIN64_NOCONSOLE_BUILD_DIR)" "$(DIST)"
 
 build-server:
 	[ -d "$(SERVER_BUILD_DIR)" ] || ( mkdir "$(SERVER_BUILD_DIR)" && \
@@ -54,6 +55,7 @@ build-win32: prepare-deps-win32
 		meson "$(WIN32_BUILD_DIR)" \
 			--cross-file cross_win32.txt \
 			--buildtype release --strip -Db_lto=true \
+			-Dcrossbuild_windows=true \
 			-Dbuild_server=false \
 			-Doverride_server_path=scrcpy-server.jar )
 	ninja -C "$(WIN32_BUILD_DIR)"
@@ -63,6 +65,7 @@ build-win32-noconsole: prepare-deps-win32
 		meson "$(WIN32_NOCONSOLE_BUILD_DIR)" \
 			--cross-file cross_win32.txt \
 			--buildtype release --strip -Db_lto=true \
+			-Dcrossbuild_windows=true \
 			-Dbuild_server=false \
 			-Dwindows_noconsole=true \
 			-Doverride_server_path=scrcpy-server.jar )
@@ -76,6 +79,7 @@ build-win64: prepare-deps-win64
 		meson "$(WIN64_BUILD_DIR)" \
 			--cross-file cross_win64.txt \
 			--buildtype release --strip -Db_lto=true \
+			-Dcrossbuild_windows=true \
 			-Dbuild_server=false \
 			-Doverride_server_path=scrcpy-server.jar )
 	ninja -C "$(WIN64_BUILD_DIR)"
@@ -85,6 +89,7 @@ build-win64-noconsole: prepare-deps-win64
 		meson "$(WIN64_NOCONSOLE_BUILD_DIR)" \
 			--cross-file cross_win64.txt \
 			--buildtype release --strip -Db_lto=true \
+			-Dcrossbuild_windows=true \
 			-Dbuild_server=false \
 			-Dwindows_noconsole=true \
 			-Doverride_server_path=scrcpy-server.jar )
@@ -95,10 +100,10 @@ dist-win32: build-server build-win32 build-win32-noconsole
 	cp "$(SERVER_BUILD_DIR)"/server/scrcpy-server.jar "$(DIST)/$(WIN32_TARGET_DIR)/"
 	cp "$(WIN32_BUILD_DIR)"/app/scrcpy.exe "$(DIST)/$(WIN32_TARGET_DIR)/"
 	cp "$(WIN32_NOCONSOLE_BUILD_DIR)"/app/scrcpy.exe "$(DIST)/$(WIN32_TARGET_DIR)/scrcpy-noconsole.exe"
-	cp prebuilt-deps/ffmpeg-4.0-win32-shared/bin/avutil-56.dll "$(DIST)/$(WIN32_TARGET_DIR)/"
+	cp prebuilt-deps/ffmpeg-4.0.2-win32-shared/bin/avutil-56.dll "$(DIST)/$(WIN32_TARGET_DIR)/"
-	cp prebuilt-deps/ffmpeg-4.0-win32-shared/bin/avcodec-58.dll "$(DIST)/$(WIN32_TARGET_DIR)/"
+	cp prebuilt-deps/ffmpeg-4.0.2-win32-shared/bin/avcodec-58.dll "$(DIST)/$(WIN32_TARGET_DIR)/"
-	cp prebuilt-deps/ffmpeg-4.0-win32-shared/bin/avformat-58.dll "$(DIST)/$(WIN32_TARGET_DIR)/"
+	cp prebuilt-deps/ffmpeg-4.0.2-win32-shared/bin/avformat-58.dll "$(DIST)/$(WIN32_TARGET_DIR)/"
-	cp prebuilt-deps/ffmpeg-4.0-win32-shared/bin/swresample-3.dll "$(DIST)/$(WIN32_TARGET_DIR)/"
+	cp prebuilt-deps/ffmpeg-4.0.2-win32-shared/bin/swresample-3.dll "$(DIST)/$(WIN32_TARGET_DIR)/"
 	cp prebuilt-deps/platform-tools/adb.exe "$(DIST)/$(WIN32_TARGET_DIR)/"
 	cp prebuilt-deps/platform-tools/AdbWinApi.dll "$(DIST)/$(WIN32_TARGET_DIR)/"
 	cp prebuilt-deps/platform-tools/AdbWinUsbApi.dll "$(DIST)/$(WIN32_TARGET_DIR)/"
@@ -109,10 +114,10 @@ dist-win64: build-server build-win64 build-win64-noconsole
 	cp "$(SERVER_BUILD_DIR)"/server/scrcpy-server.jar "$(DIST)/$(WIN64_TARGET_DIR)/"
 	cp "$(WIN64_BUILD_DIR)"/app/scrcpy.exe "$(DIST)/$(WIN64_TARGET_DIR)/"
 	cp "$(WIN64_NOCONSOLE_BUILD_DIR)"/app/scrcpy.exe "$(DIST)/$(WIN64_TARGET_DIR)/scrcpy-noconsole.exe"
-	cp prebuilt-deps/ffmpeg-4.0-win64-shared/bin/avutil-56.dll "$(DIST)/$(WIN64_TARGET_DIR)/"
+	cp prebuilt-deps/ffmpeg-4.0.2-win64-shared/bin/avutil-56.dll "$(DIST)/$(WIN64_TARGET_DIR)/"
-	cp prebuilt-deps/ffmpeg-4.0-win64-shared/bin/avcodec-58.dll "$(DIST)/$(WIN64_TARGET_DIR)/"
+	cp prebuilt-deps/ffmpeg-4.0.2-win64-shared/bin/avcodec-58.dll "$(DIST)/$(WIN64_TARGET_DIR)/"
-	cp prebuilt-deps/ffmpeg-4.0-win64-shared/bin/avformat-58.dll "$(DIST)/$(WIN64_TARGET_DIR)/"
+	cp prebuilt-deps/ffmpeg-4.0.2-win64-shared/bin/avformat-58.dll "$(DIST)/$(WIN64_TARGET_DIR)/"
-	cp prebuilt-deps/ffmpeg-4.0-win64-shared/bin/swresample-3.dll "$(DIST)/$(WIN64_TARGET_DIR)/"
+	cp prebuilt-deps/ffmpeg-4.0.2-win64-shared/bin/swresample-3.dll "$(DIST)/$(WIN64_TARGET_DIR)/"
 	cp prebuilt-deps/platform-tools/adb.exe "$(DIST)/$(WIN64_TARGET_DIR)/"
 	cp prebuilt-deps/platform-tools/AdbWinApi.dll "$(DIST)/$(WIN64_TARGET_DIR)/"
 	cp prebuilt-deps/platform-tools/AdbWinUsbApi.dll "$(DIST)/$(WIN64_TARGET_DIR)/"
@@ -128,4 +133,4 @@ zip-win64: dist-win64
 
 sums:
 	cd "$(DIST)"; \
-		sha256sum *.zip > SHA256SUM.txt
+		sha256sum *.zip > SHA256SUMS.txt

README.md

@@ -1,8 +1,8 @@
-# scrcpy
+# scrcpy (v1.3)
 
 This application provides display and control of Android devices connected on
-USB. It does not require any _root_ access. It works on _GNU/Linux_, _Windows_
+USB (or [over TCP/IP][article-tcpip]). It does not require any _root_ access.
-and _MacOS_.
+It works on _GNU/Linux_, _Windows_ and _MacOS_.
 
 ![screenshot](assets/screenshot-debian-600.jpg)
 
@@ -14,16 +14,12 @@ The Android part requires at least API 21 (Android 5.0).
 You need [adb]. It is available in the [Android SDK platform
 tools][platform-tools], or packaged in your distribution (`android-adb-tools`).
 
-On Windows, if you use the [prebuilt application](#windows), it is already
+On Windows, just [download scrcpy for Windows](#windows), `adb` is included.
-included. Otherwise, just download the [platform-tools][platform-tools-windows]
-and extract the following files to a directory accessible from your `PATH`:
- - `adb.exe`
- - `AdbWinApi.dll`
- - `AdbWinUsbApi.dll`
 
 Make sure you [enabled adb debugging][enable-adb] on your device(s).
 
-The client requires [FFmpeg] and [LibSDL2].
+The client requires [FFmpeg] and [LibSDL2]. On Windows, they are included in the
+[prebuilt application](#windows).
 
 [adb]: https://developer.android.com/studio/command-line/adb.html
 [enable-adb]: https://developer.android.com/studio/command-line/adb.html#Enabling
@@ -80,18 +76,25 @@ Two [AUR] packages have been created by users:
 
 #### Windows
 
-For Windows, for simplicity, a prebuilt archive with all the dependencies
+For Windows, for simplicity, prebuilt archives with all the dependencies
-(including `adb`) is available:
+(including `adb`) are available:
 
- - [`scrcpy-windows-with-deps-v1.1.zip`][direct-windows-with-deps].  
+ - [`scrcpy-win32-v1.3.zip`][direct-win32].  
-   _(SHA-256: 27eb36c15937601d1062c1dc0b45faae0e06fefea2019aadeb4fa7f76a07bb4c)_
+   _(SHA-256: 51a2990e631ed469a7a86ff38107d517a91d313fb3f8327eb7bc71dde40870b5)_
+ - [`scrcpy-win64-v1.3.zip`][direct-win64].  
+   _(SHA-256: 0768a80d3d600d0bbcd220ca150ae88a3a58d1fe85c308a8c61f44480b711e43)_
 
-[direct-windows-with-deps]: https://github.com/Genymobile/scrcpy/releases/download/v1.1/scrcpy-windows-with-deps-v1.1.zip
+[direct-win32]: https://github.com/Genymobile/scrcpy/releases/download/v1.3/scrcpy-win32-v1.3.zip
-
+[direct-win64]: https://github.com/Genymobile/scrcpy/releases/download/v1.3/scrcpy-win64-v1.3.zip
-_(It's just a portable version including _dll_ copied from MSYS2.)_
 
 Instead, you may want to build it manually.
 
+In that case, download the [platform-tools][platform-tools-windows] and extract
+the following files to a directory accessible from your `PATH`:
+ - `adb.exe`
+ - `AdbWinApi.dll`
+ - `AdbWinUsbApi.dll`
+
 ##### Cross-compile from Linux
 
 This is the preferred method (and the way the release is built).
@@ -244,10 +247,10 @@ Since the server binary, that will be pushed to the Android device, does not
 depend on your system and architecture, you may want to use the prebuilt binary
 instead:
 
- - [`scrcpy-server-v1.1.jar`][direct-scrcpy-server].  
+ - [`scrcpy-server-v1.3.jar`][direct-scrcpy-server].  
-   _(SHA-256: 14826512bf38447ec94adf3b531676ce038d19e7e06757fb4e537882b17e77b3)_
+   _(SHA-256: 0f9a5a217f33f0ed7a1498ceb3c0cccf31c53533893aa952e674c1571d2740c1)_
 
-[direct-scrcpy-server]: https://github.com/Genymobile/scrcpy/releases/download/v1.1/scrcpy-server-v1.1.jar
+[direct-scrcpy-server]: https://github.com/Genymobile/scrcpy/releases/download/v1.3/scrcpy-server-v1.3.jar
 
 In that case, the build does not require Java or the Android SDK.
 
@@ -291,6 +294,12 @@ screen is smaller, or cannot decode such a high definition):
 scrcpy -m 1024
 ```
 
+The device screen may be cropped to mirror only part of the screen:
+
+```bash
+scrcpy -c 1224:1440:0:0   # 1224x1440 at offset (0,0)
+```
+
 If several devices are listed in `adb devices`, you must specify the _serial_:
 
 ```bash
@@ -303,6 +312,12 @@ To show physical touches while scrcpy is running:
 scrcpy -t
 ```
 
+The app may be started directly in fullscreen:
+
+```
+scrcpy -f
+```
+
 To run without installing:
 
 ```bash
@@ -329,6 +344,8 @@ To run without installing:
  | turn screen on                         | _Right-click²_                |
  | paste computer clipboard to device     | `Ctrl`+`v`                    |
  | enable/disable FPS counter (on stdout) | `Ctrl`+`i`                    |
+ | install APK from computer              | drag & drop APK file          |
+ | push file to `/sdcard/`                | drag & drop non-APK file      |
 
 _¹Double-click on black borders to remove them._  
 _²Right-click turns the screen on if it was off, presses BACK otherwise._
@@ -374,5 +391,8 @@ Read the [developers page].
 
 ## Articles
 
-- [Introducing scrcpy](https://blog.rom1v.com/2018/03/introducing-scrcpy/)
+- [Introducing scrcpy][article-intro]
-- [Scrcpy now works wirelessly](https://www.genymotion.com/blog/open-source-project-scrcpy-now-works-wirelessly/)
+- [Scrcpy now works wirelessly][article-tcpip]
+
+[article-intro]: https://blog.rom1v.com/2018/03/introducing-scrcpy/
+[article-tcpip]: https://www.genymotion.com/blog/open-source-project-scrcpy-now-works-wirelessly/

app/meson.build

@@ -1,24 +1,25 @@
 src = [
     'src/main.c',
     'src/command.c',
-    'src/controlevent.c',
+    'src/control_event.c',
     'src/controller.c',
     'src/convert.c',
     'src/decoder.c',
     'src/device.c',
-    'src/fpscounter.c',
+    'src/file_handler.c',
+    'src/fps_counter.c',
     'src/frames.c',
-    'src/inputmanager.c',
+    'src/input_manager.c',
-    'src/lockutil.c',
+    'src/lock_util.c',
     'src/net.c',
     'src/scrcpy.c',
     'src/screen.c',
     'src/server.c',
-    'src/strutil.c',
+    'src/str_util.c',
-    'src/tinyxpm.c',
+    'src/tiny_xpm.c',
 ]
 
-if not meson.is_cross_build()
+if not get_option('crossbuild_windows')
 
     # native build
     dependencies = [
@@ -84,7 +85,7 @@ conf = configuration_data()
 conf.set('BUILD_DEBUG', get_option('buildtype') == 'debug')
 
 # the version, updated on release
-conf.set_quoted('SCRCPY_VERSION', '1.1')
+conf.set_quoted('SCRCPY_VERSION', '1.3')
 
 # the prefix used during configuration (meson --prefix=PREFIX)
 conf.set_quoted('PREFIX', get_option('prefix'))
@@ -125,6 +126,9 @@ conf.set('SKIP_FRAMES', get_option('skip_frames'))
 # enable High DPI support
 conf.set('HIDPI_SUPPORT', get_option('hidpi_support'))
 
+# disable console on Windows
+conf.set('WINDOWS_NOCONSOLE', get_option('windows_noconsole'))
+
 configure_file(configuration: conf, output: 'config.h')
 
 src_dir = include_directories('src')
@@ -143,9 +147,9 @@ executable('scrcpy', src, dependencies: dependencies, include_directories: src_d
 ### TESTS
 
 tests = [
-    ['test_control_event_queue', ['tests/test_control_event_queue.c', 'src/controlevent.c']],
+    ['test_control_event_queue', ['tests/test_control_event_queue.c', 'src/control_event.c']],
-    ['test_control_event_serialize', ['tests/test_control_event_serialize.c', 'src/controlevent.c']],
+    ['test_control_event_serialize', ['tests/test_control_event_serialize.c', 'src/control_event.c']],
-    ['test_strutil', ['tests/test_strutil.c', 'src/strutil.c']],
+    ['test_strutil', ['tests/test_strutil.c', 'src/str_util.c']],
 ]
 
 foreach t : tests

app/src/android/input.h

@@ -777,9 +777,6 @@ enum android_input_source {
     AINPUT_SOURCE_JOYSTICK = 0x01000000 | AINPUT_SOURCE_CLASS_JOYSTICK,
     /** rotary encoder */
     AINPUT_SOURCE_ROTARY_ENCODER = 0x00400000 | AINPUT_SOURCE_CLASS_NONE,
-
-    /** any */
-    AINPUT_SOURCE_ANY = 0xffffff00,
 };
 
 /**

app/src/command.c

@@ -18,9 +18,25 @@ static inline const char *get_adb_command() {
     return adb_command;
 }
 
+static void show_adb_err_msg(enum process_result err) {
+    switch (err) {
+        case PROCESS_ERROR_GENERIC:
+            LOGE("Failed to execute adb");
+            break;
+        case PROCESS_ERROR_MISSING_BINARY:
+            LOGE("'adb' command not found (make it accessible from your PATH "
+                  "or define its full path in the ADB environment variable)");
+            break;
+        case PROCESS_SUCCESS:
+            /* do nothing */
+            break;
+    }
+}
+
 process_t adb_execute(const char *serial, const char *const adb_cmd[], int len) {
     const char *cmd[len + 4];
     int i;
+    process_t process;
     cmd[0] = get_adb_command();
     if (serial) {
         cmd[1] = "-s";
@@ -32,7 +48,12 @@ process_t adb_execute(const char *serial, const char *const adb_cmd[], int len)
 
     memcpy(&cmd[i], adb_cmd, len * sizeof(const char *));
     cmd[len + i] = NULL;
-    return cmd_execute(cmd[0], cmd);
+    enum process_result r = cmd_execute(cmd[0], cmd, &process);
+    if (r != PROCESS_SUCCESS) {
+        show_adb_err_msg(r);
+        return PROCESS_NONE;
+    }
+    return process;
 }
 
 process_t adb_forward(const char *serial, uint16_t local_port, const char *device_socket_name) {
@@ -72,6 +93,21 @@ process_t adb_push(const char *serial, const char *local, const char *remote) {
     return adb_execute(serial, adb_cmd, ARRAY_LEN(adb_cmd));
 }
 
+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)
+    size_t len = strlen(local);
+    char quoted[len + 3];
+    memcpy(&quoted[1], local, len);
+    quoted[0] = '"';
+    quoted[len + 1] = '"';
+    quoted[len + 2] = '\0';
+    local = quoted;
+#endif
+    const char *const adb_cmd[] = {"install", "-r", local};
+    return adb_execute(serial, adb_cmd, ARRAY_LEN(adb_cmd));
+}
+
 process_t adb_remove_path(const char *serial, const char *path) {
     const char *const adb_cmd[] = {"shell", "rm", path};
     return adb_execute(serial, adb_cmd, ARRAY_LEN(adb_cmd));

app/src/command.h

@@ -32,7 +32,13 @@
 #endif
 # define NO_EXIT_CODE -1
 
-process_t cmd_execute(const char *path, const char *const argv[]);
+enum process_result {
+    PROCESS_SUCCESS,
+    PROCESS_ERROR_GENERIC,
+    PROCESS_ERROR_MISSING_BINARY,
+};
+
+enum process_result cmd_execute(const char *path, const char *const argv[], process_t *process);
 SDL_bool cmd_terminate(process_t pid);
 SDL_bool cmd_simple_wait(process_t pid, exit_code_t *exit_code);
 
@@ -42,6 +48,7 @@ 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);
 process_t adb_remove_path(const char *serial, const char *path);
 
 // convenience function to wait for a successful process execution

app/src/control_event.c

@@ -1,9 +1,9 @@
-#include "controlevent.h"
+#include "control_event.h"
 
 #include <SDL2/SDL_stdinc.h>
 #include <string.h>
 
-#include "lockutil.h"
+#include "lock_util.h"
 #include "log.h"
 
 static inline void write16(Uint8 *buf, Uint16 value) {

app/src/controller.c

@@ -1,6 +1,8 @@
 #include "controller.h"
 
-#include "lockutil.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) {
@@ -65,12 +67,8 @@ static int run_controller(void *data) {
             break;
         }
         struct control_event event;
-#ifdef BUILD_DEBUG
+        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);
-#else
-        control_event_queue_take(&controller->queue, &event);
-#endif
         mutex_unlock(controller->mutex);
 
         SDL_bool ok = process_event(controller, &event);

app/src/controller.h

@@ -1,7 +1,7 @@
 #ifndef CONTROL_H
 #define CONTROL_H
 
-#include "controlevent.h"
+#include "control_event.h"
 
 #include <SDL2/SDL_mutex.h>
 #include <SDL2/SDL_stdinc.h>

app/src/convert.h

@@ -3,7 +3,7 @@
 
 #include <SDL2/SDL_stdinc.h>
 #include <SDL2/SDL_events.h>
-#include "controlevent.h"
+#include "control_event.h"
 
 struct complete_mouse_motion_event {
     SDL_MouseMotionEvent *mouse_motion_event;

app/src/decoder.c

@@ -9,7 +9,7 @@
 #include "config.h"
 #include "events.h"
 #include "frames.h"
-#include "lockutil.h"
+#include "lock_util.h"
 #include "log.h"
 
 #define BUFSIZE 0x10000

app/src/device.h

@@ -7,6 +7,7 @@
 #include "net.h"
 
 #define DEVICE_NAME_FIELD_LENGTH 64
+#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);

app/src/file_handler.c

@@ -0,0 +1,231 @@
+#include "file_handler.h"
+
+#include <string.h>
+#include <SDL2/SDL_assert.h>
+#include "config.h"
+#include "command.h"
+#include "device.h"
+#include "lock_util.h"
+#include "log.h"
+
+struct request {
+    file_handler_action_t action;
+    const char *file;
+};
+
+static struct request *request_new(file_handler_action_t action, const char *file) {
+    struct request *req = SDL_malloc(sizeof(*req));
+    if (!req) {
+        return NULL;
+    }
+    req->action = action;
+    req->file = file;
+    return req;
+}
+
+static void request_free(struct request *req) {
+    if (!req) {
+        return;
+    }
+    SDL_free((void *) req->file);
+    SDL_free((void *) req);
+}
+
+static SDL_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) {
+    return (queue->head + 1) % REQUEST_QUEUE_SIZE == queue->tail;
+}
+
+static SDL_bool request_queue_init(struct request_queue *queue) {
+    queue->head = 0;
+    queue->tail = 0;
+    return SDL_TRUE;
+}
+
+static void request_queue_destroy(struct request_queue *queue) {
+    int i = queue->tail;
+    while (i != queue->head) {
+        request_free(queue->reqs[i]);
+        i = (i + 1) % REQUEST_QUEUE_SIZE;
+    }
+}
+
+static SDL_bool request_queue_push(struct request_queue *queue, struct request *req) {
+    if (request_queue_is_full(queue)) {
+        return SDL_FALSE;
+    }
+    queue->reqs[queue->head] = req;
+    queue->head = (queue->head + 1) % REQUEST_QUEUE_SIZE;
+    return SDL_TRUE;
+}
+
+static SDL_bool request_queue_take(struct request_queue *queue, struct request **req) {
+    if (request_queue_is_empty(queue)) {
+        return SDL_FALSE;
+    }
+    // transfer ownership
+    *req = queue->reqs[queue->tail];
+    queue->tail = (queue->tail + 1) % REQUEST_QUEUE_SIZE;
+    return SDL_TRUE;
+}
+
+SDL_bool file_handler_init(struct file_handler *file_handler, const char *serial) {
+
+    if (!request_queue_init(&file_handler->queue)) {
+        return SDL_FALSE;
+    }
+
+    if (!(file_handler->mutex = SDL_CreateMutex())) {
+        return SDL_FALSE;
+    }
+
+    if (!(file_handler->event_cond = SDL_CreateCond())) {
+        SDL_DestroyMutex(file_handler->mutex);
+        return SDL_FALSE;
+    }
+
+    if (serial) {
+        file_handler->serial = SDL_strdup(serial);
+        if (!file_handler->serial) {
+            LOGW("Cannot strdup serial");
+            SDL_DestroyMutex(file_handler->mutex);
+            return SDL_FALSE;
+        }
+    } else {
+        file_handler->serial = NULL;
+    }
+
+    // lazy initialization
+    file_handler->initialized = SDL_FALSE;
+
+    file_handler->stopped = SDL_FALSE;
+    file_handler->current_process = PROCESS_NONE;
+
+    return SDL_TRUE;
+}
+
+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);
+}
+
+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) {
+    return adb_push(serial, file, DEVICE_SDCARD_PATH);
+}
+
+SDL_bool file_handler_request(struct file_handler *file_handler,
+                              file_handler_action_t action,
+                              const char *file) {
+    SDL_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;
+        }
+        file_handler->initialized = SDL_TRUE;
+    }
+
+    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;
+    }
+
+    mutex_lock(file_handler->mutex);
+    SDL_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);
+    }
+    mutex_unlock(file_handler->mutex);
+    return res;
+}
+
+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)) {
+            cond_wait(file_handler->event_cond, file_handler->mutex);
+        }
+        if (file_handler->stopped) {
+            // stop immediately, do not process further events
+            mutex_unlock(file_handler->mutex);
+            break;
+        }
+        struct request *req;
+        SDL_bool non_empty = request_queue_take(&file_handler->queue, &req);
+        SDL_assert(non_empty);
+
+        process_t process;
+        if (req->action == ACTION_INSTALL_APK) {
+            LOGI("Installing %s...", req->file);
+            process = install_apk(file_handler->serial, req->file);
+        } else {
+            LOGI("Pushing %s...", req->file);
+            process = push_file(file_handler->serial, req->file);
+        }
+        file_handler->current_process = process;
+        mutex_unlock(file_handler->mutex);
+
+        if (req->action == ACTION_INSTALL_APK) {
+            if (process_check_success(process, "adb install")) {
+                LOGI("%s successfully installed", req->file);
+            } else {
+                LOGE("Failed to install %s", req->file);
+            }
+        } else {
+            if (process_check_success(process, "adb push")) {
+                LOGI("%s successfully pushed to /sdcard/", req->file);
+            } else {
+                LOGE("Failed to push %s to /sdcard/", req->file);
+            }
+        }
+
+        request_free(req);
+    }
+    return 0;
+}
+
+SDL_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);
+    if (!file_handler->thread) {
+        LOGC("Could not start file_handler thread");
+        return SDL_FALSE;
+    }
+
+    return SDL_TRUE;
+}
+
+void file_handler_stop(struct file_handler *file_handler) {
+    mutex_lock(file_handler->mutex);
+    file_handler->stopped = SDL_TRUE;
+    cond_signal(file_handler->event_cond);
+    if (file_handler->current_process != PROCESS_NONE) {
+        if (!cmd_terminate(file_handler->current_process)) {
+            LOGW("Cannot terminate install process");
+        }
+        cmd_simple_wait(file_handler->current_process, NULL);
+        file_handler->current_process = PROCESS_NONE;
+    }
+    mutex_unlock(file_handler->mutex);
+}
+
+void file_handler_join(struct file_handler *file_handler) {
+    SDL_WaitThread(file_handler->thread, NULL);
+}

app/src/file_handler.h

@@ -0,0 +1,44 @@
+#ifndef FILE_HANDLER_H
+#define FILE_HANDLER_H
+
+#include <SDL2/SDL_mutex.h>
+#include <SDL2/SDL_stdinc.h>
+#include <SDL2/SDL_thread.h>
+#include "command.h"
+
+#define REQUEST_QUEUE_SIZE 16
+
+typedef enum {
+    ACTION_INSTALL_APK,
+    ACTION_PUSH_FILE,
+} file_handler_action_t;
+
+struct request_queue {
+    struct request *reqs[REQUEST_QUEUE_SIZE];
+    int tail;
+    int head;
+};
+
+struct file_handler {
+    const char *serial;
+    SDL_Thread *thread;
+    SDL_mutex *mutex;
+    SDL_cond *event_cond;
+    SDL_bool stopped;
+    SDL_bool initialized;
+    process_t current_process;
+    struct request_queue queue;
+};
+
+SDL_bool file_handler_init(struct file_handler *file_handler, const char *serial);
+void file_handler_destroy(struct file_handler *file_handler);
+
+SDL_bool file_handler_start(struct file_handler *file_handler);
+void file_handler_stop(struct file_handler *file_handler);
+void file_handler_join(struct file_handler *file_handler);
+
+SDL_bool file_handler_request(struct file_handler *file_handler,
+                              file_handler_action_t action,
+                              const char *file);
+
+#endif

app/src/fps_counter.c

@@ -1,4 +1,4 @@
-#include "fpscounter.h"
+#include "fps_counter.h"
 
 #include <SDL2/SDL_timer.h>
 

app/src/frames.c

@@ -6,7 +6,7 @@
 #include <libavformat/avformat.h>
 
 #include "config.h"
-#include "lockutil.h"
+#include "lock_util.h"
 #include "log.h"
 
 SDL_bool frames_init(struct frames *frames) {

app/src/frames.h

@@ -5,7 +5,7 @@
 #include <SDL2/SDL_stdinc.h>
 
 #include "config.h"
-#include "fpscounter.h"
+#include "fps_counter.h"
 
 // forward declarations
 typedef struct AVFrame AVFrame;

app/src/input_manager.c

@@ -1,7 +1,7 @@
-#include "inputmanager.h"
+#include "input_manager.h"
 
 #include "convert.h"
-#include "lockutil.h"
+#include "lock_util.h"
 #include "log.h"
 
 // Convert window coordinates (as provided by SDL_GetMouseState() to renderer coordinates (as provided in SDL mouse events)
@@ -29,52 +29,58 @@ static struct point get_mouse_point(struct screen *screen) {
     };
 }
 
-static void send_keycode(struct controller *controller, enum android_keycode keycode, const char *name) {
+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) {
     // send DOWN event
     struct control_event control_event;
     control_event.type = CONTROL_EVENT_TYPE_KEYCODE;
-    control_event.keycode_event.action = AKEY_EVENT_ACTION_DOWN;
     control_event.keycode_event.keycode = keycode;
     control_event.keycode_event.metastate = 0;
 
-    if (!controller_push_event(controller, &control_event)) {
+    if (actions & ACTION_DOWN) {
-        LOGW("Cannot send %s (DOWN)", name);
+        control_event.keycode_event.action = AKEY_EVENT_ACTION_DOWN;
-        return;
+        if (!controller_push_event(controller, &control_event)) {
+            LOGW("Cannot send %s (DOWN)", name);
+            return;
+        }
     }
 
-    // send UP event
+    if (actions & ACTION_UP) {
-    control_event.keycode_event.action = AKEY_EVENT_ACTION_UP;
+        control_event.keycode_event.action = AKEY_EVENT_ACTION_UP;
-    if (!controller_push_event(controller, &control_event)) {
+        if (!controller_push_event(controller, &control_event)) {
-        LOGW("Cannot send %s (UP)", name);
+            LOGW("Cannot send %s (UP)", name);
+        }
     }
 }
 
-static inline void action_home(struct controller *controller) {
+static inline void action_home(struct controller *controller, int actions) {
-    send_keycode(controller, AKEYCODE_HOME, "HOME");
+    send_keycode(controller, AKEYCODE_HOME, actions, "HOME");
 }
 
-static inline void action_back(struct controller *controller) {
+static inline void action_back(struct controller *controller, int actions) {
-    send_keycode(controller, AKEYCODE_BACK, "BACK");
+    send_keycode(controller, AKEYCODE_BACK, actions, "BACK");
 }
 
-static inline void action_app_switch(struct controller *controller) {
+static inline void action_app_switch(struct controller *controller, int actions) {
-    send_keycode(controller, AKEYCODE_APP_SWITCH, "APP_SWITCH");
+    send_keycode(controller, AKEYCODE_APP_SWITCH, actions, "APP_SWITCH");
 }
 
-static inline void action_power(struct controller *controller) {
+static inline void action_power(struct controller *controller, int actions) {
-    send_keycode(controller, AKEYCODE_POWER, "POWER");
+    send_keycode(controller, AKEYCODE_POWER, actions, "POWER");
 }
 
-static inline void action_volume_up(struct controller *controller) {
+static inline void action_volume_up(struct controller *controller, int actions) {
-    send_keycode(controller, AKEYCODE_VOLUME_UP, "VOLUME_UP");
+    send_keycode(controller, AKEYCODE_VOLUME_UP, actions, "VOLUME_UP");
 }
 
-static inline void action_volume_down(struct controller *controller) {
+static inline void action_volume_down(struct controller *controller, int actions) {
-    send_keycode(controller, AKEYCODE_VOLUME_DOWN, "VOLUME_DOWN");
+    send_keycode(controller, AKEYCODE_VOLUME_DOWN, actions, "VOLUME_DOWN");
 }
 
-static inline void action_menu(struct controller *controller) {
+static inline void action_menu(struct controller *controller, int actions) {
-    send_keycode(controller, AKEYCODE_MENU, "MENU");
+    send_keycode(controller, AKEYCODE_MENU, actions, "MENU");
 }
 
 // turn the screen on if it was off, press BACK otherwise
@@ -141,57 +147,74 @@ void input_manager_process_key(struct input_manager *input_manager,
 
     // capture all Ctrl events
     if (ctrl) {
-        SDL_bool repeat = event->repeat;
-
-        // only consider keydown events, and ignore repeated events
-        if (repeat || event->type != SDL_KEYDOWN) {
-            return;
-        }
-
         SDL_bool shift = event->keysym.mod & (KMOD_LSHIFT | KMOD_RSHIFT);
         if (shift) {
-            // currently, there is no shortcut implying 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;
         switch (keycode) {
             case SDLK_h:
-                action_home(input_manager->controller);
+                if (!repeat) {
+                    action_home(input_manager->controller, action);
+                }
                 return;
             case SDLK_b: // fall-through
             case SDLK_BACKSPACE:
-                action_back(input_manager->controller);
+                if (!repeat) {
+                    action_back(input_manager->controller, action);
+                }
                 return;
             case SDLK_s:
-                action_app_switch(input_manager->controller);
+                if (!repeat) {
+                    action_app_switch(input_manager->controller, action);
+                }
                 return;
             case SDLK_m:
-                action_menu(input_manager->controller);
+                if (!repeat) {
+                    action_menu(input_manager->controller, action);
+                }
                 return;
             case SDLK_p:
-                action_power(input_manager->controller);
+                if (!repeat) {
+                    action_power(input_manager->controller, action);
+                }
                 return;
             case SDLK_DOWN:
-                action_volume_down(input_manager->controller);
+                // forward repeated events
+                action_volume_down(input_manager->controller, action);
                 return;
             case SDLK_UP:
-                action_volume_up(input_manager->controller);
+                // forward repeated events
+                action_volume_up(input_manager->controller, action);
                 return;
             case SDLK_v:
-                clipboard_paste(input_manager->controller);
+                if (!repeat && event->type == SDL_KEYDOWN) {
+                    clipboard_paste(input_manager->controller);
+                }
                 return;
             case SDLK_f:
-                screen_switch_fullscreen(input_manager->screen);
+                if (!repeat && event->type == SDL_KEYDOWN) {
+                    screen_switch_fullscreen(input_manager->screen);
+                }
                 return;
             case SDLK_x:
-                screen_resize_to_fit(input_manager->screen);
+                if (!repeat && event->type == SDL_KEYDOWN) {
+                    screen_resize_to_fit(input_manager->screen);
+                }
                 return;
             case SDLK_g:
-                screen_resize_to_pixel_perfect(input_manager->screen);
+                if (!repeat && event->type == SDL_KEYDOWN) {
+                    screen_resize_to_pixel_perfect(input_manager->screen);
+                }
                 return;
             case SDLK_i:
-                switch_fps_counter_state(input_manager->frames);
+                if (!repeat && event->type == SDL_KEYDOWN) {
+                    switch_fps_counter_state(input_manager->frames);
+                }
                 return;
         }
 
@@ -228,7 +251,7 @@ void input_manager_process_mouse_button(struct input_manager *input_manager,
             return;
         }
         if (event->button == SDL_BUTTON_MIDDLE) {
-            action_home(input_manager->controller);
+            action_home(input_manager->controller, ACTION_DOWN | ACTION_UP);
             return;
         }
         // double-click on black borders resize to fit the device screen
@@ -242,7 +265,7 @@ void input_manager_process_mouse_button(struct input_manager *input_manager,
             }
             // otherwise, send the click event to the device
         }
-    };
+    }
     struct control_event 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)) {

app/src/input_manager.h

@@ -3,7 +3,7 @@
 
 #include "common.h"
 #include "controller.h"
-#include "fpscounter.h"
+#include "fps_counter.h"
 #include "frames.h"
 #include "screen.h"
 

app/src/lock_util.c

@@ -1,3 +1,4 @@
+#include <lock_util.h>
 #include <stdlib.h>
 #include <SDL2/SDL_mutex.h>
 

app/src/main.c

@@ -10,6 +10,8 @@
 
 struct args {
     const char *serial;
+    const char *crop;
+    SDL_bool fullscreen;
     SDL_bool help;
     SDL_bool version;
     SDL_bool show_touches;
@@ -29,6 +31,15 @@ static void usage(const char *arg0) {
         "        Unit suffixes are supported: 'K' (x1000) and 'M' (x1000000).\n"
         "        Default is %d.\n"
         "\n"
+        "    -c, --crop width:height:x:y\n"
+        "        Crop the device screen on the server.\n"
+        "        The values are expressed in the device natural orientation\n"
+        "        (typically, portrait for a phone, landscape for a tablet).\n"
+        "        Any --max-size value is computed on the cropped size.\n"
+        "\n"
+        "    -f, --fullscreen\n"
+        "        Start in fullscreen.\n"
+        "\n"
         "    -h, --help\n"
         "        Print this help.\n"
         "\n"
@@ -98,6 +109,9 @@ static void usage(const char *arg0) {
         "\n"
         "    Ctrl+i\n"
         "        enable/disable FPS counter (print frames/second in logs)\n"
+        "\n"
+        "    Drag & drop APK file\n"
+        "        install APK from computer\n"
         "\n",
         arg0,
         DEFAULT_BIT_RATE,
@@ -189,6 +203,8 @@ static SDL_bool parse_port(char *optarg, Uint16 *port) {
 static SDL_bool parse_args(struct args *args, int argc, char *argv[]) {
     static const struct option long_options[] = {
         {"bit-rate",     required_argument, NULL, 'b'},
+        {"crop",         required_argument, NULL, 'c'},
+        {"fullscreen",   no_argument,       NULL, 'f'},
         {"help",         no_argument,       NULL, 'h'},
         {"max-size",     required_argument, NULL, 'm'},
         {"port",         required_argument, NULL, 'p'},
@@ -198,13 +214,19 @@ static SDL_bool parse_args(struct args *args, int argc, char *argv[]) {
         {NULL,           0,                 NULL, 0  },
     };
     int c;
-    while ((c = getopt_long(argc, argv, "b:hm:p:s:tv", long_options, NULL)) != -1) {
+    while ((c = getopt_long(argc, argv, "b:c:fhm:p:s:tv", long_options, NULL)) != -1) {
         switch (c) {
             case 'b':
                 if (!parse_bit_rate(optarg, &args->bit_rate)) {
                     return SDL_FALSE;
                 }
                 break;
+            case 'c':
+                args->crop = optarg;
+                break;
+            case 'f':
+                args->fullscreen = SDL_TRUE;
+                break;
             case 'h':
                 args->help = SDL_TRUE;
                 break;
@@ -250,6 +272,7 @@ int main(int argc, char *argv[]) {
 #endif
     struct args args = {
         .serial = NULL,
+        .crop = NULL,
         .help = SDL_FALSE,
         .version = SDL_FALSE,
         .show_touches = SDL_FALSE,
@@ -271,7 +294,9 @@ int main(int argc, char *argv[]) {
         return 0;
     }
 
+#if LIBAVCODEC_VERSION_INT < AV_VERSION_INT(58, 9, 100)
     av_register_all();
+#endif
 
     if (avformat_network_init()) {
         return 1;
@@ -283,10 +308,12 @@ int main(int argc, char *argv[]) {
 
     struct scrcpy_options options = {
         .serial = args.serial,
+        .crop = args.crop,
         .port = args.port,
         .max_size = args.max_size,
         .bit_rate = args.bit_rate,
         .show_touches = args.show_touches,
+        .fullscreen = args.fullscreen,
     };
     int res = scrcpy(&options) ? 0 : 1;
 

app/src/scrcpy.c

@@ -13,21 +13,23 @@
 #include "decoder.h"
 #include "device.h"
 #include "events.h"
+#include "file_handler.h"
 #include "frames.h"
-#include "fpscounter.h"
+#include "fps_counter.h"
-#include "inputmanager.h"
+#include "input_manager.h"
 #include "log.h"
-#include "lockutil.h"
+#include "lock_util.h"
 #include "net.h"
 #include "screen.h"
 #include "server.h"
-#include "tinyxpm.h"
+#include "tiny_xpm.h"
 
 static struct server server = SERVER_INITIALIZER;
 static struct screen screen = SCREEN_INITIALIZER;
 static struct frames frames;
 static struct decoder decoder;
 static struct controller controller;
+static struct file_handler file_handler;
 
 static struct input_manager input_manager = {
     .controller = &controller,
@@ -54,7 +56,12 @@ static int event_watcher(void *data, SDL_Event *event) {
 }
 #endif
 
-static void event_loop(void) {
+static SDL_bool is_apk(const char *file) {
+    const char *ext = strrchr(file, '.');
+    return ext && !strcmp(ext, ".apk");
+}
+
+static SDL_bool event_loop(void) {
 #ifdef CONTINUOUS_RESIZING_WORKAROUND
     SDL_AddEventWatch(event_watcher, NULL);
 #endif
@@ -63,10 +70,10 @@ static void event_loop(void) {
         switch (event.type) {
             case EVENT_DECODER_STOPPED:
                 LOGD("Video decoder stopped");
-                return;
+                return SDL_FALSE;
             case SDL_QUIT:
                 LOGD("User requested to quit");
-                return;
+                return SDL_TRUE;
             case EVENT_NEW_FRAME:
                 if (!screen.has_frame) {
                     screen.has_frame = SDL_TRUE;
@@ -74,13 +81,14 @@ static void event_loop(void) {
                     screen_show_window(&screen);
                 }
                 if (!screen_update_frame(&screen, &frames)) {
-                    return;
+                    return SDL_FALSE;
                 }
                 break;
             case SDL_WINDOWEVENT:
                 switch (event.window.event) {
                     case SDL_WINDOWEVENT_EXPOSED:
                     case SDL_WINDOWEVENT_SIZE_CHANGED:
+                        screen_update_scale(&screen);
                         screen_render(&screen);
                         break;
                 }
@@ -102,8 +110,19 @@ static void event_loop(void) {
             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;
 }
 
 static process_t set_show_touches_enabled(const char *serial, SDL_bool enabled) {
@@ -121,11 +140,11 @@ static void wait_show_touches(process_t process) {
 
 SDL_bool scrcpy(const struct scrcpy_options *options) {
     if (!server_start(&server, options->serial, options->port,
-                      options->max_size, options->bit_rate)) {
+                      options->max_size, options->bit_rate, options->crop)) {
         return SDL_FALSE;
     }
 
-    process_t proc_show_touches = NULL;
+    process_t proc_show_touches = PROCESS_NONE;
     SDL_bool show_touches_waited;
     if (options->show_touches) {
         LOGI("Enable show_touches");
@@ -169,6 +188,12 @@ SDL_bool scrcpy(const struct scrcpy_options *options) {
         goto finally_destroy_server;
     }
 
+    if (!file_handler_init(&file_handler, server.serial)) {
+        ret = SDL_FALSE;
+        server_stop(&server);
+        goto finally_destroy_frames;
+    }
+
     decoder_init(&decoder, &frames, device_socket);
 
     // now we consumed the header values, the socket receives the video stream
@@ -176,7 +201,7 @@ SDL_bool scrcpy(const struct scrcpy_options *options) {
     if (!decoder_start(&decoder)) {
         ret = SDL_FALSE;
         server_stop(&server);
-        goto finally_destroy_frames;
+        goto finally_destroy_file_handler;
     }
 
     if (!controller_init(&controller, device_socket)) {
@@ -199,7 +224,11 @@ SDL_bool scrcpy(const struct scrcpy_options *options) {
         show_touches_waited = SDL_TRUE;
     }
 
-    event_loop();
+    if (options->fullscreen) {
+        screen_switch_fullscreen(&screen);
+    }
+
+    ret = event_loop();
     LOGD("quit...");
 
     screen_destroy(&screen);
@@ -214,6 +243,10 @@ finally_stop_decoder:
     // stop the server before decoder_join() to wake up the decoder
     server_stop(&server);
     decoder_join(&decoder);
+finally_destroy_file_handler:
+    file_handler_stop(&file_handler);
+    file_handler_join(&file_handler);
+    file_handler_destroy(&file_handler);
 finally_destroy_frames:
     frames_destroy(&frames);
 finally_destroy_server:

app/src/scrcpy.h

@@ -5,10 +5,12 @@
 
 struct scrcpy_options {
     const char *serial;
+    const char *crop;
     Uint16 port;
     Uint16 max_size;
     Uint32 bit_rate;
     SDL_bool show_touches;
+    SDL_bool fullscreen;
 };
 
 SDL_bool scrcpy(const struct scrcpy_options *options);

app/src/screen.c

@@ -4,9 +4,9 @@
 #include <string.h>
 
 #include "icon.xpm"
-#include "lockutil.h"
+#include "lock_util.h"
 #include "log.h"
-#include "tinyxpm.h"
+#include "tiny_xpm.h"
 
 #define DISPLAY_MARGINS 96
 
@@ -132,6 +132,17 @@ static inline struct size get_initial_optimal_size(struct size frame_size) {
     return get_optimal_size(frame_size, frame_size);
 }
 
+// apply hidpi scaling and call SDL_RenderSetLogicalSize
+static inline SDL_bool render_set_scaled_logical_size(struct screen *screen, struct size size) {
+    int w, h, dw, dh;
+    SDL_GL_GetDrawableSize(screen->window, &w, &h);
+    SDL_GetWindowSize(screen->window, &dw, &dh);
+    // use 32 bits unsigned not to lose precision (width and height fit in 16 bits)
+    int scaled_x = (Uint32) size.width * (Uint32) w / (Uint32) dw;
+    int scaled_y = (Uint32) size.height * (Uint32) h / (Uint32) dh;
+    return SDL_RenderSetLogicalSize(screen->renderer, scaled_x, scaled_y);
+}
+
 void screen_init(struct screen *screen) {
     *screen = (struct screen) SCREEN_INITIALIZER;
 }
@@ -163,7 +174,7 @@ SDL_bool screen_init_rendering(struct screen *screen, const char *device_name, s
         return SDL_FALSE;
     }
 
-    if (SDL_RenderSetLogicalSize(screen->renderer, frame_size.width, frame_size.height)) {
+    if (render_set_scaled_logical_size(screen, frame_size)) {
         LOGE("Could not set renderer logical size: %s", SDL_GetError());
         screen_destroy(screen);
         return SDL_FALSE;
@@ -208,7 +219,7 @@ 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) {
     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)) {
+        if (render_set_scaled_logical_size(screen, new_frame_size)) {
             LOGE("Could not set renderer logical size: %s", SDL_GetError());
             return SDL_FALSE;
         }
@@ -302,3 +313,7 @@ void screen_resize_to_pixel_perfect(struct screen *screen) {
         LOGD("Resized to pixel-perfect");
     }
 }
+
+void screen_update_scale(struct screen *screen) {
+    render_set_scaled_logical_size(screen, screen->frame_size);
+}

app/src/screen.h

@@ -66,4 +66,8 @@ void screen_resize_to_fit(struct screen *screen);
 // resize window to 1:1 (pixel-perfect)
 void screen_resize_to_pixel_perfect(struct screen *screen);
 
+// recompute the scale in case the window moved from/to another screen with a
+// different HiDPI
+void screen_update_scale(struct screen *screen);
+
 #endif

app/src/server.c

@@ -77,7 +77,8 @@ static SDL_bool disable_tunnel(struct server *server) {
 }
 
 static process_t execute_server(const char *serial,
-                                Uint16 max_size, Uint32 bit_rate, SDL_bool tunnel_forward) {
+                                Uint16 max_size, Uint32 bit_rate,
+                                const char *crop, SDL_bool tunnel_forward) {
     char max_size_string[6];
     char bit_rate_string[11];
     sprintf(max_size_string, "%"PRIu16, max_size);
@@ -91,6 +92,7 @@ static process_t execute_server(const char *serial,
         max_size_string,
         bit_rate_string,
         tunnel_forward ? "true" : "false",
+        crop ? crop : "",
     };
     return adb_execute(serial, cmd, sizeof(cmd) / sizeof(cmd[0]));
 }
@@ -147,7 +149,7 @@ void server_init(struct server *server) {
 }
 
 SDL_bool server_start(struct server *server, const char *serial, Uint16 local_port,
-                      Uint16 max_size, Uint32 bit_rate) {
+                      Uint16 max_size, Uint32 bit_rate, const char *crop) {
     server->local_port = local_port;
 
     if (serial) {
@@ -188,7 +190,8 @@ SDL_bool server_start(struct server *server, const char *serial, Uint16 local_po
     }
 
     // server will connect to our server socket
-    server->process = execute_server(serial, max_size, bit_rate, server->tunnel_forward);
+    server->process = execute_server(serial, max_size, bit_rate, crop,
+                                     server->tunnel_forward);
     if (server->process == PROCESS_NONE) {
         if (!server->tunnel_forward) {
             close_socket(&server->server_socket);
@@ -207,7 +210,7 @@ socket_t server_connect_to(struct server *server) {
     if (!server->tunnel_forward) {
         server->device_socket = net_accept(server->server_socket);
     } else {
-        Uint32 attempts = 50;
+        Uint32 attempts = 100;
         Uint32 delay = 100; // ms
         server->device_socket = connect_to_server(server->local_port, attempts, delay);
     }

app/src/server.h

@@ -31,7 +31,7 @@ void server_init(struct server *server);
 
 // push, enable tunnel et start the server
 SDL_bool server_start(struct server *server, const char *serial, Uint16 local_port,
-                      Uint16 max_size, Uint32 bit_rate);
+                      Uint16 max_size, Uint32 bit_rate, const char *crop);
 
 // block until the communication with the server is established
 socket_t server_connect_to(struct server *server);

app/src/str_util.c

@@ -1,4 +1,4 @@
-#include "strutil.h"
+#include "str_util.h"
 
 size_t xstrncpy(char *dest, const char *src, size_t n) {
     size_t i;

app/src/sys/unix/command.c

@@ -1,25 +1,80 @@
 #include "command.h"
 
+#include <errno.h>
+#include <fcntl.h>
 #include <signal.h>
+#include <stdlib.h>
 #include <sys/types.h>
 #include <sys/wait.h>
 #include <unistd.h>
+#include "log.h"
 
-pid_t cmd_execute(const char *path, const char *const argv[]) {
+enum process_result cmd_execute(const char *path, const char *const argv[], pid_t *pid) {
-    pid_t pid = fork();
+    int fd[2];
-    if (pid == -1) {
+
-        perror("fork");
+    if (pipe(fd) == -1) {
-        return -1;
+        perror("pipe");
+        return PROCESS_ERROR_GENERIC;
     }
-    if (pid == 0) {
+
-        execvp(path, (char *const *)argv);
+    enum process_result ret = PROCESS_SUCCESS;
-        perror("exec");
+
+    *pid = fork();
+    if (*pid == -1) {
+        perror("fork");
+        ret = PROCESS_ERROR_GENERIC;
+        goto end;
+    }
+
+    if (*pid > 0) {
+        // parent close write side
+        close(fd[1]);
+        fd[1] = -1;
+        // wait for EOF or receive errno from child
+        if (read(fd[0], &ret, sizeof(ret)) == -1) {
+            perror("read");
+            ret = PROCESS_ERROR_GENERIC;
+            goto end;
+        }
+    } else if (*pid == 0) {
+        // child close read side
+        close(fd[0]);
+        if (fcntl(fd[1], F_SETFD, FD_CLOEXEC) == 0) {
+            execvp(path, (char *const *)argv);
+            if (errno == ENOENT) {
+                ret = PROCESS_ERROR_MISSING_BINARY;
+            } else {
+                ret = PROCESS_ERROR_GENERIC;
+            }
+            perror("exec");
+        } else {
+            perror("fcntl");
+            ret = PROCESS_ERROR_GENERIC;
+        }
+        // send ret to the parent
+        if (write(fd[1], &ret, sizeof(ret)) == -1) {
+            perror("write");
+        }
+        // close write side before exiting
+        close(fd[1]);
         _exit(1);
     }
-    return pid;
+
+end:
+    if (fd[0] != -1) {
+        close(fd[0]);
+    }
+    if (fd[1] != -1) {
+        close(fd[1]);
+    }
+    return ret;
 }
 
 SDL_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);
+        abort();
+    }
     return kill(pid, SIGTERM) != -1;
 }
 

app/src/sys/win/command.c

@@ -1,9 +1,10 @@
 #include "command.h"
 
+#include "config.h"
 #include "log.h"
-#include "strutil.h"
+#include "str_util.h"
 
-HANDLE cmd_execute(const char *path, const char *const argv[]) {
+enum process_result cmd_execute(const char *path, const char *const argv[], HANDLE *handle) {
     STARTUPINFO si;
     PROCESS_INFORMATION pi;
     memset(&si, 0, sizeof(si));
@@ -17,14 +18,25 @@ HANDLE cmd_execute(const char *path, const char *const argv[]) {
     size_t ret = xstrjoin(cmd, argv, ' ', sizeof(cmd));
     if (ret >= sizeof(cmd)) {
         LOGE("Command too long (%" PRIsizet " chars)", sizeof(cmd) - 1);
-        return NULL;
+        *handle = NULL;
+        return PROCESS_ERROR_GENERIC;
     }
 
-    if (!CreateProcess(NULL, cmd, NULL, NULL, FALSE, CREATE_NO_WINDOW, NULL, NULL, &si, &pi)) {
+#ifdef WINDOWS_NOCONSOLE
-        return NULL;
+    int flags = CREATE_NO_WINDOW;
+#else
+    int flags = 0;
+#endif
+    if (!CreateProcess(NULL, cmd, NULL, NULL, FALSE, flags, NULL, NULL, &si, &pi)) {
+        *handle = NULL;
+        if (GetLastError() == ERROR_FILE_NOT_FOUND) {
+            return PROCESS_ERROR_MISSING_BINARY;
+        }
+        return PROCESS_ERROR_GENERIC;
     }
 
-    return pi.hProcess;
+    *handle = pi.hProcess;
+    return PROCESS_SUCCESS;
 }
 
 SDL_bool cmd_terminate(HANDLE handle) {

app/src/tiny_xpm.c

@@ -1,4 +1,4 @@
-#include "tinyxpm.h"
+#include "tiny_xpm.h"
 
 #include <stdio.h>
 #include <stdlib.h>
@@ -40,15 +40,15 @@ SDL_Surface *read_xpm(char *xpm[]) {
     // *** No error handling, assume the XPM source is valid ***
     // (it's in our source repo)
     // Assertions are only checked in debug
-    Uint32 width = strtol(xpm[0], &endptr, 10);
+    int width = strtol(xpm[0], &endptr, 10);
-    Uint32 height = strtol(endptr + 1, &endptr, 10);
+    int height = strtol(endptr + 1, &endptr, 10);
-    Uint32 colors = strtol(endptr + 1, &endptr, 10);
+    int colors = strtol(endptr + 1, &endptr, 10);
-    Uint32 chars = strtol(endptr + 1, &endptr, 10);
+    int chars = strtol(endptr + 1, &endptr, 10);
 
     // sanity checks
-    SDL_assert(width < 256);
+    SDL_assert(0 <= width && width < 256);
-    SDL_assert(height < 256);
+    SDL_assert(0 <= height && height < 256);
-    SDL_assert(colors < 256);
+    SDL_assert(0 <= colors && colors < 256);
     SDL_assert(chars == 1); // this implementation does not support more
 
     // init index

app/tests/test_control_event_queue.c

@@ -1,7 +1,7 @@
 #include <assert.h>
 #include <string.h>
 
-#include "controlevent.h"
+#include "control_event.h"
 
 static void test_control_event_queue_empty() {
     struct control_event_queue queue;

app/tests/test_control_event_serialize.c

@@ -1,7 +1,7 @@
 #include <assert.h>
 #include <string.h>
 
-#include "controlevent.h"
+#include "control_event.h"
 
 static void test_serialize_keycode_event() {
     struct control_event event = {

app/tests/test_strutil.c

@@ -1,7 +1,7 @@
 #include <assert.h>
 #include <string.h>
 
-#include "strutil.h"
+#include "str_util.h"
 
 static void test_xstrncpy_simple() {
     char s[] = "xxxxxxxxxx";

build.gradle

@@ -7,7 +7,7 @@ buildscript {
         jcenter()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:3.0.1'
+        classpath 'com.android.tools.build:gradle:3.1.1'
 
         // NOTE: Do not place your application dependencies here; they belong
         // in the individual module build.gradle files

cross_win32.txt

@@ -15,6 +15,6 @@ cpu = 'i686'
 endian = 'little'
 
 [properties]
-prebuilt_ffmpeg_shared = 'ffmpeg-4.0-win32-shared'
+prebuilt_ffmpeg_shared = 'ffmpeg-4.0.2-win32-shared'
-prebuilt_ffmpeg_dev = 'ffmpeg-4.0-win32-dev'
+prebuilt_ffmpeg_dev = 'ffmpeg-4.0.2-win32-dev'
 prebuilt_sdl2 = 'SDL2-2.0.8/i686-w64-mingw32'

cross_win64.txt

@@ -15,6 +15,6 @@ cpu = 'x86_64'
 endian = 'little'
 
 [properties]
-prebuilt_ffmpeg_shared = 'ffmpeg-4.0-win64-shared'
+prebuilt_ffmpeg_shared = 'ffmpeg-4.0.2-win64-shared'
-prebuilt_ffmpeg_dev = 'ffmpeg-4.0-win64-dev'
+prebuilt_ffmpeg_dev = 'ffmpeg-4.0.2-win64-dev'
 prebuilt_sdl2 = 'SDL2-2.0.8/x86_64-w64-mingw32'

gradle/wrapper/gradle-wrapper.properties

@@ -1,6 +1,6 @@
-#Mon Jan 29 16:38:49 CET 2018
+#Mon Jun 04 11:48:32 CEST 2018
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-4.1-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-4.4-all.zip

meson.build

@@ -1,4 +1,4 @@
-project('scrcpy', 'c', meson_version: '>= 0.37')
+project('scrcpy', 'c', meson_version: '>= 0.37', default_options : 'c_std=c11')
 
 if get_option('build_app')
     subdir('app')

meson_options.txt

@@ -1,5 +1,6 @@
 option('build_app', type: 'boolean', value: true, description: 'Build the client')
 option('build_server', type: 'boolean', value: true, description: 'Build the server')
+option('crossbuild_windows', type: 'boolean', value: false, description: 'Build for Windows from Linux')
 option('windows_noconsole', type: 'boolean', value: false, description: 'Disable console on Windows (pass -mwindows flag)')
 option('prebuilt_server', type: 'string', description: 'Path of the prebuilt server')
 option('override_server_path', type: 'string', description: 'Hardcoded path to find the server at runtime')

prebuilt-deps/Makefile

@@ -10,24 +10,24 @@ prepare-win32: prepare-sdl2 prepare-ffmpeg-shared-win32 prepare-ffmpeg-dev-win32
 prepare-win64: prepare-sdl2 prepare-ffmpeg-shared-win64 prepare-ffmpeg-dev-win64 prepare-adb
 
 prepare-ffmpeg-shared-win32:
-	@./prepare-dep https://ffmpeg.zeranoe.com/builds/win32/shared/ffmpeg-4.0-win32-shared.zip \
+	@./prepare-dep https://ffmpeg.zeranoe.com/builds/win32/shared/ffmpeg-4.0.2-win32-shared.zip \
-		530c92df0ca14c35901b4b681847d62da3c50a0cc9b7ced37b04968f6b5c243d \
+		cc190a3a4cf7bfbd4fbaa92609c1501a1de458055e6cfea8b745c1d515013aa8 \
-		ffmpeg-4.0-win32-shared
+		ffmpeg-4.0.2-win32-shared
 
 prepare-ffmpeg-dev-win32:
-	@./prepare-dep https://ffmpeg.zeranoe.com/builds/win32/dev/ffmpeg-4.0-win32-dev.zip \
+	@./prepare-dep https://ffmpeg.zeranoe.com/builds/win32/dev/ffmpeg-4.0.2-win32-dev.zip \
-		e2f5200b5e73c4d0abb9b89c4ffc0438f92a0aadc54c81cf57e18c81a9f11c6b \
+		c72c74bad74ac0541f1b43090c26a50017c49041c182a703abd2057bb8cdc238 \
-		ffmpeg-4.0-win32-dev
+		ffmpeg-4.0.2-win32-dev
 
 prepare-ffmpeg-shared-win64:
-	@./prepare-dep https://ffmpeg.zeranoe.com/builds/win64/shared/ffmpeg-4.0-win64-shared.zip \
+	@./prepare-dep https://ffmpeg.zeranoe.com/builds/win64/shared/ffmpeg-4.0.2-win64-shared.zip \
-		8fe2d344463dbefc2db4239a4203a55ed0324faceaae57276a40c4fabda84c37 \
+		ede566aca8b5348dff85570f9638c6bad33209f9419f79db7bde7daa37599bff \
-		ffmpeg-4.0-win64-shared
+		ffmpeg-4.0.2-win64-shared
 
 prepare-ffmpeg-dev-win64:
-	@./prepare-dep https://ffmpeg.zeranoe.com/builds/win64/dev/ffmpeg-4.0-win64-dev.zip \
+	@./prepare-dep https://ffmpeg.zeranoe.com/builds/win64/dev/ffmpeg-4.0.2-win64-dev.zip \
-		facced738eabfc53fa92834dea8b24426f64db61298688fed480145945be07fa \
+		23ee994161c51285cb956b98d3caa499d48083dae7b26c1fdf77f22e98df1c5f \
-		ffmpeg-4.0-win64-dev
+		ffmpeg-4.0.2-win64-dev
 
 prepare-sdl2:
 	@./prepare-dep https://libsdl.org/release/SDL2-devel-2.0.8-mingw.tar.gz \
@@ -35,6 +35,6 @@ prepare-sdl2:
 		SDL2-2.0.8
 
 prepare-adb:
-	@./prepare-dep https://dl.google.com/android/repository/platform-tools_r27.0.1-windows.zip \
+	@./prepare-dep https://dl.google.com/android/repository/platform-tools_r28.0.0-windows.zip \
-	    880662adfb0d6911ff250b9e13930ae1a4110fc36d5866afd4f8f56d935f7939 \
+		e2c1ec7c8e9b71cf1c8befd3bff91d06b26dd334c3f32b3817e9d46ba260b0e8 \
 		platform-tools

server/build.gradle

@@ -6,8 +6,8 @@ android {
         applicationId "com.genymobile.scrcpy"
         minSdkVersion 21
         targetSdkVersion 27
-        versionCode 2
+        versionCode 4
-        versionName "1.1"
+        versionName "1.3"
         testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
     }
     buildTypes {

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

@@ -5,9 +5,9 @@ import android.net.LocalSocket;
 import android.net.LocalSocketAddress;
 
 import java.io.Closeable;
+import java.io.FileDescriptor;
 import java.io.IOException;
 import java.io.InputStream;
-import java.io.OutputStream;
 import java.nio.charset.StandardCharsets;
 
 public final class DesktopConnection implements Closeable {
@@ -18,14 +18,14 @@ public final class DesktopConnection implements Closeable {
 
     private final LocalSocket socket;
     private final InputStream inputStream;
-    private final OutputStream outputStream;
+    private final FileDescriptor fd;
 
     private final ControlEventReader reader = new ControlEventReader();
 
     private DesktopConnection(LocalSocket socket) throws IOException {
         this.socket = socket;
         inputStream = socket.getInputStream();
-        outputStream = socket.getOutputStream();
+        fd = socket.getFileDescriptor();
     }
 
     private static LocalSocket connect(String abstractName) throws IOException {
@@ -78,11 +78,11 @@ 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;
-        outputStream.write(buffer, 0, buffer.length);
+        IO.writeFully(fd, buffer, 0, buffer.length);
     }
 
-    public OutputStream getOutputStream() {
+    public FileDescriptor getFd() {
-        return outputStream;
+        return fd;
     }
 
     public ControlEvent receiveControlEvent() throws IOException {

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

@@ -3,6 +3,7 @@ package com.genymobile.scrcpy;
 import com.genymobile.scrcpy.wrappers.ServiceManager;
 
 import android.graphics.Point;
+import android.graphics.Rect;
 import android.os.Build;
 import android.os.RemoteException;
 import android.view.IRotationWatcher;
@@ -20,7 +21,7 @@ public final class Device {
     private RotationListener rotationListener;
 
     public Device(Options options) {
-        screenInfo = computeScreenInfo(options.getMaxSize());
+        screenInfo = computeScreenInfo(options.getCrop(), options.getMaxSize());
         registerRotationWatcher(new IRotationWatcher.Stub() {
             @Override
             public void onRotationChanged(int rotation) throws RemoteException {
@@ -40,18 +41,40 @@ public final class Device {
         return screenInfo;
     }
 
+    private ScreenInfo computeScreenInfo(Rect crop, int maxSize) {
+        DisplayInfo displayInfo = serviceManager.getDisplayManager().getDisplayInfo();
+        boolean rotated = (displayInfo.getRotation() & 1) != 0;
+        Size deviceSize = displayInfo.getSize();
+        Rect contentRect = new Rect(0, 0, deviceSize.getWidth(), deviceSize.getHeight());
+        if (crop != null) {
+            if (rotated) {
+                // the crop (provided by the user) is expressed in the natural orientation
+                crop = flipRect(crop);
+            }
+            if (!contentRect.intersect(crop)) {
+                // intersect() changes contentRect so that it is intersected with crop
+                Ln.w("Crop rectangle (" + formatCrop(crop) + ") does not intersect device screen (" + formatCrop(deviceSize.toRect()) + ")");
+                contentRect = new Rect(); // empty
+            }
+        }
+
+        Size videoSize = computeVideoSize(contentRect.width(), contentRect.height(), maxSize);
+        return new ScreenInfo(contentRect, videoSize, rotated);
+    }
+
+    private static String formatCrop(Rect rect) {
+        return rect.width() + ":" + rect.height() + ":" + rect.left + ":" + rect.top;
+    }
+
     @SuppressWarnings("checkstyle:MagicNumber")
-    private ScreenInfo computeScreenInfo(int maxSize) {
+    private static Size computeVideoSize(int w, int h, int maxSize) {
         // Compute the video size and the padding of the content inside this video.
         // Principle:
         // - scale down the great side of the screen to maxSize (if necessary);
         // - scale down the other side so that the aspect ratio is preserved;
         // - round this value to the nearest multiple of 8 (H.264 only accepts multiples of 8)
-        DisplayInfo displayInfo = serviceManager.getDisplayManager().getDisplayInfo();
+        w &= ~7; // in case it's not a multiple of 8
-        boolean rotated = (displayInfo.getRotation() & 1) != 0;
+        h &= ~7;
-        Size deviceSize = displayInfo.getSize();
-        int w = deviceSize.getWidth() & ~7; // in case it's not a multiple of 8
-        int h = deviceSize.getHeight() & ~7;
         if (maxSize > 0) {
             if (BuildConfig.DEBUG && maxSize % 8 != 0) {
                 throw new AssertionError("Max size must be a multiple of 8");
@@ -68,12 +91,12 @@ public final class Device {
             w = portrait ? minor : major;
             h = portrait ? major : minor;
         }
-        Size videoSize = new Size(w, h);
+        return new Size(w, h);
-        return new ScreenInfo(deviceSize, videoSize, rotated);
     }
 
     public Point getPhysicalPoint(Position position) {
-        @SuppressWarnings("checkstyle:HiddenField") // it hides the field on purpose, to read it with a lock
+        // it hides the field on purpose, to read it with a lock
+        @SuppressWarnings("checkstyle:HiddenField")
         ScreenInfo screenInfo = getScreenInfo(); // read with synchronization
         Size videoSize = screenInfo.getVideoSize();
         Size clientVideoSize = position.getScreenSize();
@@ -82,10 +105,10 @@ public final class Device {
             // the device may have been rotated since the event was generated, so ignore the event
             return null;
         }
-        Size deviceSize = screenInfo.getDeviceSize();
+        Rect contentRect = screenInfo.getContentRect();
         Point point = position.getPoint();
-        int scaledX = point.x * deviceSize.getWidth() / videoSize.getWidth();
+        int scaledX = contentRect.left + point.x * contentRect.width() / videoSize.getWidth();
-        int scaledY = point.y * deviceSize.getHeight() / videoSize.getHeight();
+        int scaledY = contentRect.top + point.y * contentRect.height() / videoSize.getHeight();
         return new Point(scaledX, scaledY);
     }
 
@@ -108,4 +131,8 @@ public final class Device {
     public synchronized void setRotationListener(RotationListener rotationListener) {
         this.rotationListener = rotationListener;
     }
+
+    static Rect flipRect(Rect crop) {
+        return new Rect(crop.top, crop.left, crop.bottom, crop.right);
+    }
 }

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

@@ -0,0 +1,31 @@
+package com.genymobile.scrcpy;
+
+import android.system.ErrnoException;
+import android.system.Os;
+import android.system.OsConstants;
+
+import java.io.FileDescriptor;
+import java.io.IOException;
+import java.nio.ByteBuffer;
+
+public class IO {
+    private IO() {
+        // not instantiable
+    }
+
+    public static void writeFully(FileDescriptor fd, ByteBuffer from) throws IOException {
+        while (from.hasRemaining()) {
+            try {
+                Os.write(fd, from);
+            } catch (ErrnoException e) {
+                if (e.errno != OsConstants.EINTR) {
+                    throw new IOException(e);
+                }
+            }
+        }
+    }
+
+    public static void writeFully(FileDescriptor fd, byte[] buffer, int offset, int len) throws IOException {
+        writeFully(fd, ByteBuffer.wrap(buffer, offset, len));
+    }
+}

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

@@ -1,9 +1,12 @@
 package com.genymobile.scrcpy;
 
+import android.graphics.Rect;
+
 public class Options {
     private int maxSize;
     private int bitRate;
     private boolean tunnelForward;
+    private Rect crop;
 
     public int getMaxSize() {
         return maxSize;
@@ -28,4 +31,12 @@ public class Options {
     public void setTunnelForward(boolean tunnelForward) {
         this.tunnelForward = tunnelForward;
     }
+
+    public Rect getCrop() {
+        return crop;
+    }
+
+    public void setCrop(Rect crop) {
+        this.crop = crop;
+    }
 }

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

@@ -9,8 +9,8 @@ import android.media.MediaFormat;
 import android.os.IBinder;
 import android.view.Surface;
 
+import java.io.FileDescriptor;
 import java.io.IOException;
-import java.io.OutputStream;
 import java.nio.ByteBuffer;
 import java.util.concurrent.atomic.AtomicBoolean;
 
@@ -48,7 +48,7 @@ public class ScreenEncoder implements Device.RotationListener {
         return rotationChanged.getAndSet(false);
     }
 
-    public void streamScreen(Device device, OutputStream outputStream) throws IOException {
+    public void streamScreen(Device device, FileDescriptor fd) throws IOException {
         MediaFormat format = createFormat(bitRate, frameRate, iFrameInterval);
         device.setRotationListener(this);
         boolean alive;
@@ -56,15 +56,15 @@ public class ScreenEncoder implements Device.RotationListener {
             do {
                 MediaCodec codec = createCodec();
                 IBinder display = createDisplay();
-                Rect deviceRect = device.getScreenInfo().getDeviceSize().toRect();
+                Rect contentRect = device.getScreenInfo().getContentRect();
                 Rect videoRect = device.getScreenInfo().getVideoSize().toRect();
                 setSize(format, videoRect.width(), videoRect.height());
                 configure(codec, format);
                 Surface surface = codec.createInputSurface();
-                setDisplaySurface(display, surface, deviceRect, videoRect);
+                setDisplaySurface(display, surface, contentRect, videoRect);
                 codec.start();
                 try {
-                    alive = encode(codec, outputStream);
+                    alive = encode(codec, fd);
                 } finally {
                     codec.stop();
                     destroyDisplay(display);
@@ -77,9 +77,7 @@ public class ScreenEncoder implements Device.RotationListener {
         }
     }
 
-    private boolean encode(MediaCodec codec, OutputStream outputStream) throws IOException {
+    private boolean encode(MediaCodec codec, FileDescriptor fd) throws IOException {
-        @SuppressWarnings("checkstyle:MagicNumber")
-        byte[] buf = new byte[bitRate / 8]; // may contain up to 1 second of video
         boolean eof = false;
         MediaCodec.BufferInfo bufferInfo = new MediaCodec.BufferInfo();
         while (!consumeRotationChange() && !eof) {
@@ -91,15 +89,8 @@ public class ScreenEncoder implements Device.RotationListener {
                     break;
                 }
                 if (outputBufferId >= 0) {
-                    ByteBuffer outputBuffer = codec.getOutputBuffer(outputBufferId);
+                    ByteBuffer codecBuffer = codec.getOutputBuffer(outputBufferId);
-                    while (outputBuffer.hasRemaining()) {
+                    IO.writeFully(fd, codecBuffer);
-                        int remaining = outputBuffer.remaining();
-                        int len = Math.min(buf.length, remaining);
-                        // the outputBuffer is probably direct (it has no underlying array), and LocalSocket does not expose channels,
-                        // so we must copy the data locally to write them manually to the output stream
-                        outputBuffer.get(buf, 0, len);
-                        outputStream.write(buf, 0, len);
-                    }
                 }
             } finally {
                 if (outputBufferId >= 0) {

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

@@ -1,18 +1,20 @@
 package com.genymobile.scrcpy;
 
+import android.graphics.Rect;
+
 public final class ScreenInfo {
-    private final Size deviceSize;
+    private final Rect contentRect; // device size, possibly cropped
     private final Size videoSize;
     private final boolean rotated;
 
-    public ScreenInfo(Size deviceSize, Size videoSize, boolean rotated) {
+    public ScreenInfo(Rect contentRect, Size videoSize, boolean rotated) {
-        this.deviceSize = deviceSize;
+        this.contentRect = contentRect;
         this.videoSize = videoSize;
         this.rotated = rotated;
     }
 
-    public Size getDeviceSize() {
+    public Rect getContentRect() {
-        return deviceSize;
+        return contentRect;
     }
 
     public Size getVideoSize() {
@@ -24,6 +26,6 @@ public final class ScreenInfo {
         if (rotated == newRotated) {
             return this;
         }
-        return new ScreenInfo(deviceSize.rotate(), videoSize.rotate(), newRotated);
+        return new ScreenInfo(Device.flipRect(contentRect), videoSize.rotate(), newRotated);
     }
 }

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

@@ -1,5 +1,7 @@
 package com.genymobile.scrcpy;
 
+import android.graphics.Rect;
+
 import java.io.IOException;
 
 public final class Server {
@@ -19,7 +21,7 @@ public final class Server {
 
             try {
                 // synchronous
-                screenEncoder.streamScreen(device, connection.getOutputStream());
+                screenEncoder.streamScreen(device, connection.getFd());
             } catch (IOException e) {
                 // this is expected on close
                 Ln.d("Screen streaming stopped");
@@ -63,9 +65,31 @@ public final class Server {
         boolean tunnelForward = Boolean.parseBoolean(args[2]);
         options.setTunnelForward(tunnelForward);
 
+        if (args.length < 4) {
+            return options;
+        }
+        Rect crop = parseCrop(args[3]);
+        options.setCrop(crop);
+
         return options;
     }
 
+    private static Rect parseCrop(String crop) {
+        if (crop.isEmpty()) {
+            return null;
+        }
+        // input format: "width:height:x:y"
+        String[] tokens = crop.split(":");
+        if (tokens.length != 4) {
+            throw new IllegalArgumentException("Crop must contains 4 values separated by colons: \"" + crop + "\"");
+        }
+        int width = Integer.parseInt(tokens[0]);
+        int height = Integer.parseInt(tokens[1]);
+        int x = Integer.parseInt(tokens[2]);
+        int y = Integer.parseInt(tokens[3]);
+        return new Rect(x, y, x + width, y + height);
+    }
+
     public static void main(String... args) throws Exception {
         Thread.setDefaultUncaughtExceptionHandler(new Thread.UncaughtExceptionHandler() {
             @Override