Improve portable builds

In portable builds, scrcpy-server.jar was supposed to be present in the
current directory, so in practice it worked only if scrcpy was launched
from its own directory.

Instead, find the absolute path of the executable and build a suitable
path to use scrcpy-server.jar from the same directory.

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/ffe0417228fb78ab45b7ee4e202fc06fc8875bf3/server/src/main/java/com/genymobile/scrcpy/Server.java#L123
+[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
@@ -65,18 +65,18 @@ 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/tree/ffe0417228fb78ab45b7ee4e202fc06fc8875bf3/server/src/main/java/com/genymobile/scrcpy/wrappers
-[aidl]: https://github.com/Genymobile/scrcpy/tree/ffe0417228fb78ab45b7ee4e202fc06fc8875bf3/server/src/main/aidl/android/view
+[wrappers]: https://github.com/Genymobile/scrcpy/blob/v1.8/server/src/main/java/com/genymobile/scrcpy/wrappers
+[aidl]: https://github.com/Genymobile/scrcpy/blob/v1.8/server/src/main/aidl/android/view
 
 
 ### Threading
 
-The server uses 3 threads:
+The server uses 2 threads:
 
  - the **main** thread, encoding and streaming the video to the client;
- - the **controller** thread, listening for _control messages_ (typically,
-   keyboard and mouse events) from the client;
- - the **receiver** thread (managed by the controller), sending _device messges_
+ - the **controller** thread, listening for _control events_ (typically,
+   keyboard and mouse events) from the client.
+ - the **receiver** thread (managed by the controller), sending _device events_
    to the clients (currently, it is only used to send the device clipboard
    content).
 
@@ -92,9 +92,9 @@ 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/ffe0417228fb78ab45b7ee4e202fc06fc8875bf3/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/ffe0417228fb78ab45b7ee4e202fc06fc8875bf3/server/src/main/java/com/genymobile/scrcpy/ScreenEncoder.java#L68-L69
+[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.
@@ -108,30 +108,31 @@ 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/ffe0417228fb78ab45b7ee4e202fc06fc8875bf3/server/src/main/java/com/genymobile/scrcpy/ScreenEncoder.java#L90
-[repeat]: https://github.com/Genymobile/scrcpy/blob/ffe0417228fb78ab45b7ee4e202fc06fc8875bf3/server/src/main/java/com/genymobile/scrcpy/ScreenEncoder.java#L147-L148
+[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/v1.8/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
 
 
 ### Input events injection
 
-_Control messages_ are received from the client by the [`Controller`] (run in a
-separate thread). There are several types of input events:
+_Control events_ are received from the client by the [`EventController`] (run in
+a separate thread). There are several types of input events:
  - keycode (cf [`KeyEvent`]),
  - text (special characters may not be handled by keycodes directly),
  - mouse motion/click,
  - mouse scroll,
  - other commands (e.g. to switch the screen on or to copy the clipboard).
 
-Some of them need to inject input events to the system. To do so, they use the
-_hidden_ method [`InputManager.injectInputEvent`] (exposed by our
+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]).
 
-[`Controller`]: https://github.com/Genymobile/scrcpy/blob/ffe0417228fb78ab45b7ee4e202fc06fc8875bf3/server/src/main/java/com/genymobile/scrcpy/Controller.java#L81
+[`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/ffe0417228fb78ab45b7ee4e202fc06fc8875bf3/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
 
 
 
@@ -187,13 +188,12 @@ The client uses 4 threads:
  - the **main** thread, executing the SDL event loop,
  - the **stream** thread, receiving the video and used for decoding and
    recording,
- - the **controller** thread, sending _control messages_ to the server,
+ - the **controller** thread, sending _control events_ to the server.
  - the **receiver** thread (managed by the controller), receiving _device
-   messages_ from the client.
+   events_ from the client.
 
 In addition, another thread can be started if necessary to handle APK
-installation or file push requests (via drag&drop on the main window) or to
-print the framerate regularly in the console.
+installation or file push requests (via drag&drop on the main window).
 
 
 
@@ -217,10 +217,10 @@ to decode a new frame while the main thread renders the last one.
 If a [recorder] is present (i.e. `--record` is enabled), then its muxes the raw
 H.264 packet to the output video file.
 
-[stream]: https://github.com/Genymobile/scrcpy/blob/ffe0417228fb78ab45b7ee4e202fc06fc8875bf3/app/src/stream.h
-[decoder]: https://github.com/Genymobile/scrcpy/blob/ffe0417228fb78ab45b7ee4e202fc06fc8875bf3/app/src/decoder.h
-[video_buffer]: https://github.com/Genymobile/scrcpy/blob/ffe0417228fb78ab45b7ee4e202fc06fc8875bf3/app/src/video_buffer.h
-[recorder]: https://github.com/Genymobile/scrcpy/blob/ffe0417228fb78ab45b7ee4e202fc06fc8875bf3/app/src/recorder.h
+[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
 
 ```
                                    +----------+      +----------+
@@ -234,19 +234,19 @@ H.264 packet to the output video file.
 
 ### Controller
 
-The [controller] is responsible to send _control messages_ to the device. It
-runs in a separate thread, to avoid I/O on the main thread.
+The [controller] is responsible to send _control events_ to the device. It runs
+in a separate thread, to avoid I/O on the main thread.
 
 On SDL event, received on the main thread, the [input manager][inputmanager]
-creates appropriate [_control messages_][controlmsg]. It is responsible to
+creates appropriate [_control events_][controlevent]. It is responsible to
 convert SDL events to Android events (using [convert]). It pushes the _control
-messages_ to a queue hold by the controller. On its own thread, the controller
-takes messages from the queue, that it serializes and sends to the client.
+events_ to a 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/ffe0417228fb78ab45b7ee4e202fc06fc8875bf3/app/src/controller.h
-[controlmsg]: https://github.com/Genymobile/scrcpy/blob/ffe0417228fb78ab45b7ee4e202fc06fc8875bf3/app/src/control_msg.h
-[inputmanager]: https://github.com/Genymobile/scrcpy/blob/ffe0417228fb78ab45b7ee4e202fc06fc8875bf3/app/src/input_manager.h
-[convert]: https://github.com/Genymobile/scrcpy/blob/ffe0417228fb78ab45b7ee4e202fc06fc8875bf3/app/src/convert.h
+[controller]: https://github.com/Genymobile/scrcpy/blob/v1.8/app/src/controller.h
+[controlevent]: https://github.com/Genymobile/scrcpy/blob/v1.8/app/src/control_event.h
+[inputmanager]: https://github.com/Genymobile/scrcpy/blob/v1.8/app/src/input_manager.h
+[convert]: https://github.com/Genymobile/scrcpy/blob/v1.8/app/src/convert.h
 
 
 ### UI and event loop
@@ -257,9 +257,10 @@ 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/ffe0417228fb78ab45b7ee4e202fc06fc8875bf3/app/src/scrcpy.c
-[event loop]: https://github.com/Genymobile/scrcpy/blob/ffe0417228fb78ab45b7ee4e202fc06fc8875bf3/app/src/scrcpy.c#L201
-[screen]: https://github.com/Genymobile/scrcpy/blob/ffe0417228fb78ab45b7ee4e202fc06fc8875bf3/app/src/screen.h
+[scrcpy]: https://github.com/Genymobile/scrcpy/blob/v1.8/app/src/scrcpy.c
+[event loop]:
+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

FAQ.md

@@ -19,6 +19,10 @@ Windows may need some [drivers] to detect your device.
 
 [drivers]: https://developer.android.com/studio/run/oem-usb.html
 
+If you still encounter problems, please see [issue 9].
+
+[issue 9]: https://github.com/Genymobile/scrcpy/issues/9
+
 
 ### Mouse clicks do not work
 

Makefile.CrossWindows

@@ -100,29 +100,28 @@ 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)/$(WIN32_TARGET_DIR)/scrcpy-noconsole.exe"
-	cp prebuilt-deps/ffmpeg-4.1.3-win32-shared/bin/avutil-56.dll "$(DIST)/$(WIN32_TARGET_DIR)/"
-	cp prebuilt-deps/ffmpeg-4.1.3-win32-shared/bin/avcodec-58.dll "$(DIST)/$(WIN32_TARGET_DIR)/"
-	cp prebuilt-deps/ffmpeg-4.1.3-win32-shared/bin/avformat-58.dll "$(DIST)/$(WIN32_TARGET_DIR)/"
-	cp prebuilt-deps/ffmpeg-4.1.3-win32-shared/bin/swresample-3.dll "$(DIST)/$(WIN32_TARGET_DIR)/"
+	cp prebuilt-deps/ffmpeg-4.1-win32-shared/bin/avutil-56.dll "$(DIST)/$(WIN32_TARGET_DIR)/"
+	cp prebuilt-deps/ffmpeg-4.1-win32-shared/bin/avcodec-58.dll "$(DIST)/$(WIN32_TARGET_DIR)/"
+	cp prebuilt-deps/ffmpeg-4.1-win32-shared/bin/avformat-58.dll "$(DIST)/$(WIN32_TARGET_DIR)/"
+	cp prebuilt-deps/ffmpeg-4.1-win32-shared/bin/swresample-3.dll "$(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)/$(WIN32_TARGET_DIR)/"
-	cp prebuilt-deps/SDL2-2.0.8/i686-w64-mingw32/bin/SDL2.dll "$(DIST)/$(WIN32_TARGET_DIR)/"
+	cp prebuilt-deps/SDL2-2.0.9/i686-w64-mingw32/bin/SDL2.dll "$(DIST)/$(WIN32_TARGET_DIR)/"
 
 dist-win64: build-server build-win64 build-win64-noconsole
 	mkdir -p "$(DIST)/$(WIN64_TARGET_DIR)"
 	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)/$(WIN64_TARGET_DIR)/scrcpy-noconsole.exe"
-	cp prebuilt-deps/ffmpeg-4.1.3-win64-shared/bin/avutil-56.dll "$(DIST)/$(WIN64_TARGET_DIR)/"
-	cp prebuilt-deps/ffmpeg-4.1.3-win64-shared/bin/avcodec-58.dll "$(DIST)/$(WIN64_TARGET_DIR)/"
-	cp prebuilt-deps/ffmpeg-4.1.3-win64-shared/bin/avformat-58.dll "$(DIST)/$(WIN64_TARGET_DIR)/"
-	cp prebuilt-deps/ffmpeg-4.1.3-win64-shared/bin/swresample-3.dll "$(DIST)/$(WIN64_TARGET_DIR)/"
-	cp prebuilt-deps/ffmpeg-4.1.3-win64-shared/bin/swscale-5.dll "$(DIST)/$(WIN64_TARGET_DIR)/"
+	cp prebuilt-deps/ffmpeg-4.1-win64-shared/bin/avutil-56.dll "$(DIST)/$(WIN64_TARGET_DIR)/"
+	cp prebuilt-deps/ffmpeg-4.1-win64-shared/bin/avcodec-58.dll "$(DIST)/$(WIN64_TARGET_DIR)/"
+	cp prebuilt-deps/ffmpeg-4.1-win64-shared/bin/avformat-58.dll "$(DIST)/$(WIN64_TARGET_DIR)/"
+	cp prebuilt-deps/ffmpeg-4.1-win64-shared/bin/swresample-3.dll "$(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)/$(WIN64_TARGET_DIR)/"
-	cp prebuilt-deps/SDL2-2.0.8/x86_64-w64-mingw32/bin/SDL2.dll "$(DIST)/$(WIN64_TARGET_DIR)/"
+	cp prebuilt-deps/SDL2-2.0.9/x86_64-w64-mingw32/bin/SDL2.dll "$(DIST)/$(WIN64_TARGET_DIR)/"
 
 zip-win32: dist-win32
 	cd "$(DIST)"; \

README.md

@@ -331,8 +331,8 @@ To use a specific _adb_ binary, configure its path in the environment variable
 
     ADB=/path/to/adb scrcpy
 
-To override the path of the `scrcpy-server.jar` file, configure its path in
-`SCRCPY_SERVER_PATH`.
+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
 

app/src/stream.c

@@ -113,7 +113,7 @@ read_packet_with_meta(void *opaque, uint8_t *buf, int buf_size) {
 
     ssize_t r = net_recv(stream->socket, buf, buf_size);
     if (r == -1) {
-        return errno ? AVERROR(errno) : AVERROR_EOF;
+        return AVERROR(errno);
     }
     if (r == 0) {
         return AVERROR_EOF;
@@ -130,7 +130,7 @@ 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 errno ? AVERROR(errno) : AVERROR_EOF;
+        return AVERROR(errno);
     }
     if (r == 0) {
         return AVERROR_EOF;

app/src/sys/unix/command.c

@@ -107,8 +107,6 @@ cmd_simple_wait(pid_t pid, int *exit_code) {
 
 char *
 get_executable_path(void) {
-// <https://stackoverflow.com/a/1024937/1987178>
-#ifdef __linux__
     char buf[PATH_MAX + 1]; // +1 for the null byte
     ssize_t len = readlink("/proc/self/exe", buf, PATH_MAX);
     if (len == -1) {
@@ -117,10 +115,4 @@ get_executable_path(void) {
     }
     buf[len] = '\0';
     return SDL_strdup(buf);
-#else
-    // in practice, we only need this feature for portable builds, only used on
-    // Windows, so we don't care implementing it for every platform
-    // (it's useful to have a working version on Linux for debugging though)
-    return NULL;
-#endif
 }

cross_win32.txt

@@ -15,6 +15,6 @@ cpu = 'i686'
 endian = 'little'
 
 [properties]
-prebuilt_ffmpeg_shared = 'ffmpeg-4.1.3-win32-shared'
-prebuilt_ffmpeg_dev = 'ffmpeg-4.1.3-win32-dev'
-prebuilt_sdl2 = 'SDL2-2.0.8/i686-w64-mingw32'
+prebuilt_ffmpeg_shared = 'ffmpeg-4.1-win32-shared'
+prebuilt_ffmpeg_dev = 'ffmpeg-4.1-win32-dev'
+prebuilt_sdl2 = 'SDL2-2.0.9/i686-w64-mingw32'

cross_win64.txt

@@ -15,6 +15,6 @@ cpu = 'x86_64'
 endian = 'little'
 
 [properties]
-prebuilt_ffmpeg_shared = 'ffmpeg-4.1.3-win64-shared'
-prebuilt_ffmpeg_dev = 'ffmpeg-4.1.3-win64-dev'
-prebuilt_sdl2 = 'SDL2-2.0.8/x86_64-w64-mingw32'
+prebuilt_ffmpeg_shared = 'ffmpeg-4.1-win64-shared'
+prebuilt_ffmpeg_dev = 'ffmpeg-4.1-win64-dev'
+prebuilt_sdl2 = 'SDL2-2.0.9/x86_64-w64-mingw32'

meson.build

@@ -1,5 +1,5 @@
 project('scrcpy', 'c',
-        version: '1.9',
+        version: '1.8',
         meson_version: '>= 0.37',
         default_options: 'c_std=c11')
 

prebuilt-deps/Makefile

@@ -10,31 +10,31 @@ 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-4.1.3-win32-shared.zip \
-		8ea472d673370d5e87517a75587abfa6f189ee4f82e8da21fdbc49d0db0c1a89 \
-		ffmpeg-4.1.3-win32-shared
+	@./prepare-dep https://ffmpeg.zeranoe.com/builds/win32/shared/ffmpeg-4.1-win32-shared.zip \
+		e692b18c01745d262c03294b382fd64df68fabe3c66aa4546a3ad3935175cde3 \
+		ffmpeg-4.1-win32-shared
 
 prepare-ffmpeg-dev-win32:
-	@./prepare-dep https://ffmpeg.zeranoe.com/builds/win32/dev/ffmpeg-4.1.3-win32-dev.zip \
-		e16d3150b6ccf0b71908f5b964cb8c051d79053c8f5cd6d777d617ab4f03613a \
-		ffmpeg-4.1.3-win32-dev
+	@./prepare-dep https://ffmpeg.zeranoe.com/builds/win32/dev/ffmpeg-4.1-win32-dev.zip \
+		34bc5e471fb9160609abd6bc271e361050f3ff7376b1b8a0873cca02b38277c8 \
+		ffmpeg-4.1-win32-dev
 
 prepare-ffmpeg-shared-win64:
-	@./prepare-dep https://ffmpeg.zeranoe.com/builds/win64/shared/ffmpeg-4.1.3-win64-shared.zip \
-		0b974578e07d974c4bafb36c7ed0b46e46b001d38b149455089c13b57ddefe5d \
-		ffmpeg-4.1.3-win64-shared
+	@./prepare-dep https://ffmpeg.zeranoe.com/builds/win64/shared/ffmpeg-4.1-win64-shared.zip \
+		c4908c97436c946509dc365e421159274fa4b1e66dce6fb5b63d82a6294d5357 \
+		ffmpeg-4.1-win64-shared
 
 prepare-ffmpeg-dev-win64:
-	@./prepare-dep https://ffmpeg.zeranoe.com/builds/win64/dev/ffmpeg-4.1.3-win64-dev.zip \
-		334b473467db096a5b74242743592a73e120a137232794508e4fc55593696a5b \
-		ffmpeg-4.1.3-win64-dev
+	@./prepare-dep https://ffmpeg.zeranoe.com/builds/win64/dev/ffmpeg-4.1-win64-dev.zip \
+		761ec79aa3dae66698c9791a2f0bb9da8794246f8356cadc741ddc0eabab0471 \
+		ffmpeg-4.1-win64-dev
 
 prepare-sdl2:
-	@./prepare-dep https://libsdl.org/release/SDL2-devel-2.0.8-mingw.tar.gz \
-		ffff7305d634aff5e1df5b7bb935435c3a02c8b03ad94a1a2be9169a558a7961 \
-		SDL2-2.0.8
+	@./prepare-dep https://libsdl.org/release/SDL2-devel-2.0.9-mingw.tar.gz \
+		0f9f00d0f2a9a95dfb5cce929718210c3f85432cc2e9d4abade4adcb7f6bb39d \
+		SDL2-2.0.9
 
 prepare-adb:
-	@./prepare-dep https://dl.google.com/android/repository/platform-tools_r29.0.1-windows.zip \
-		2334f92cf571fd2d9bf6ff7c637765bee5d8323e0bd8e051e15927d87b54b4e8 \
+	@./prepare-dep https://dl.google.com/android/repository/platform-tools_r28.0.1-windows.zip \
+		db78f726d5dc653706dcd15a462ab1b946c643f598df76906c4c1858411c54df \
 		platform-tools

server/build.gradle

@@ -1,13 +1,13 @@
 apply plugin: 'com.android.application'
 
 android {
-    compileSdkVersion 29
+    compileSdkVersion 27
     defaultConfig {
         applicationId "com.genymobile.scrcpy"
         minSdkVersion 21
-        targetSdkVersion 29
-        versionCode 10
-        versionName "1.9"
+        targetSdkVersion 27
+        versionCode 9
+        versionName "1.8"
         testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
     }
     buildTypes {

server/src/test/java/com/genymobile/scrcpy/StringUtilsTest.java

@@ -1,6 +1,7 @@
 package com.genymobile.scrcpy;
 
-import org.junit.Assert;
+import junit.framework.Assert;
+
 import org.junit.Test;
 
 import java.nio.charset.StandardCharsets;
@@ -9,7 +10,7 @@ public class StringUtilsTest {
 
     @Test
     @SuppressWarnings("checkstyle:MagicNumber")
-    public void testUtf8Truncate() {
+    public void testUtf8Trucate() {
         String s = "aÉbÔc";
         byte[] utf8 = s.getBytes(StandardCharsets.UTF_8);
         Assert.assertEquals(7, utf8.length);