Implement audio forwarding

Use Android Open Accessory 2 to redirect the device audio output to the computer, creating a new audio input source. Record this new source and play it to the default output. <https://source.android.com/devices/accessories/aoa2#audio-support>
Expose functions to get device serial and model
2018-04-12 13:33:17 +02:00 · 2018-04-12 13:32:32 +02:00 · 2018-04-12 13:32:32 +02:00
65 changed files with 1275 additions and 1536 deletions
--- a/BUILD.md
+++ b/BUILD.md
@@ -1,236 +0,0 @@
-# Build scrcpy
-
-Here are the instructions to build _scrcpy_ (client and server).
-
-You may want to build only the client: the server binary, which will be pushed
-to the Android device, does not depend on your system and architecture. In that
-case, use the [prebuilt server] (so you will not need Java or the Android SDK).
-
-[prebuilt server]: #prebuilt-server
-
-
-## Requirements
-
-You need [adb]. It is available in the [Android SDK platform
-tools][platform-tools], or packaged in your distribution (`android-adb-tools`).
-
-On Windows, 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`
-
-The client requires [FFmpeg] and [LibSDL2]. Just follow the instructions.
-
-[adb]: https://developer.android.com/studio/command-line/adb.html
-[platform-tools]: https://developer.android.com/studio/releases/platform-tools.html
-[platform-tools-windows]: https://dl.google.com/android/repository/platform-tools-latest-windows.zip
-[ffmpeg]: https://en.wikipedia.org/wiki/FFmpeg
-[LibSDL2]: https://en.wikipedia.org/wiki/Simple_DirectMedia_Layer
-
-
-
-## System-specific steps
-
-### Linux
-
-Install the required packages from your package manager.
-
-#### Debian/Ubuntu
-
-```bash
-# runtime dependencies
-sudo apt install ffmpeg libsdl2-2.0.0
-
-# client build dependencies
-sudo apt install make gcc pkg-config meson \
-                 libavcodec-dev libavformat-dev libavutil-dev \
-                 libsdl2-dev
-
-# server build dependencies
-sudo apt install openjdk-8-jdk
-```
-
-#### Fedora
-
-```bash
-# enable RPM fusion free
-sudo dnf install https://download1.rpmfusion.org/free/fedora/rpmfusion-free-release-$(rpm -E %fedora).noarch.rpm
-
-# client build dependencies
-sudo dnf install SDL2-devel ffms2-devel meson gcc make
-
-# server build dependencies
-sudo dnf install java
-```
-
-
-
-### Windows
-
-#### Cross-compile from Linux
-
-This is the preferred method (and the way the release is built).
-
-From _Debian_, install _mingw_:
-
-```bash
-sudo apt install mingw-w64 mingw-w64-tools
-```
-
-You also need the JDK to build the server:
-
-```bash
-sudo apt install openjdk-8-jdk
-```
-
-Then generate the releases:
-
-```bash
-make -f Makefile.CrossWindows
-```
-
-It will generate win32 and win64 releases into `dist/`.
-
-
-#### In MSYS2
-
-From Windows, you need [MSYS2] to build the project. From an MSYS2 terminal,
-install the required packages:
-
-[MSYS2]: http://www.msys2.org/
-
-```bash
-# runtime dependencies
-pacman -S mingw-w64-x86_64-SDL2 \
-          mingw-w64-x86_64-ffmpeg
-
-# client build dependencies
-pacman -S mingw-w64-x86_64-make \
-          mingw-w64-x86_64-gcc \
-          mingw-w64-x86_64-pkg-config \
-          mingw-w64-x86_64-meson
-```
-
-For a 32 bits version, replace `x86_64` by `i686`:
-
-```bash
-# runtime dependencies
-pacman -S mingw-w64-i686-SDL2 \
-          mingw-w64-i686-ffmpeg
-
-# client build dependencies
-pacman -S mingw-w64-i686-make \
-          mingw-w64-i686-gcc \
-          mingw-w64-i686-pkg-config \
-          mingw-w64-i686-meson
-```
-
-Java (>= 7) is not available in MSYS2, so if you plan to build the server,
-install it manually and make it available from the `PATH`:
-
-```bash
-export PATH="$JAVA_HOME/bin:$PATH"
-```
-
-### Mac OS
-
-Install the packages with [Homebrew]:
-
-[Homebrew]: https://brew.sh/
-
-```bash
-# runtime dependencies
-brew install sdl2 ffmpeg
-
-# client build dependencies
-brew install pkg-config meson
-```
-
-Additionally, if you want to build the server, install Java 8 from Caskroom, and
-make it avaliable from the `PATH`:
-
-```bash
-brew tap caskroom/versions
-brew cask install java8
-export JAVA_HOME="$(/usr/libexec/java_home --version 1.8)"
-export PATH="$JAVA_HOME/bin:$PATH"
-```
-
-### Docker
-
-See [pierlon/scrcpy-docker](https://github.com/pierlon/scrcpy-docker).
-
-
-## Common steps
-
-If you want to build the server, install the [Android SDK] (_Android Studio_),
-and set `ANDROID_HOME` to its directory. For example:
-
-[Android SDK]: https://developer.android.com/studio/index.html
-
-```bash
-export ANDROID_HOME=~/android/sdk
-```
-
-If you don't want to build the server, use the [prebuilt server].
-
-Clone the project:
-
-```bash
-git clone https://github.com/Genymobile/scrcpy
-cd scrcpy
-```
-
-Then, build:
-
-```bash
-meson x --buildtype release --strip -Db_lto=true
-cd x
-ninja
-```
-
-### Run
-
-To run without installing:
-
-```bash
-./run x [options]
-```
-
-
-### Install
-
-After a successful build, you can install _scrcpy_ on the system:
-
-```bash
-sudo ninja install    # without sudo on Windows
-```
-
-This installs two files:
-
- - `/usr/local/bin/scrcpy`
- - `/usr/local/share/scrcpy/scrcpy-server.jar`
-
-Just remove them to "uninstall" the application.
-
-You can then [run](README.md#run) _scrcpy_.
-
-
-## Prebuilt server
-
- - [`scrcpy-server-v1.4.jar`][direct-scrcpy-server]  
-   _(SHA-256: 1ff7a72fcfe81dadccfab9d6f86c971cd7c7f38f17196748fe05480e301b443d)_
-
-[direct-scrcpy-server]: https://github.com/Genymobile/scrcpy/releases/download/v1.4/scrcpy-server-v1.4.jar
-
-Download the prebuilt server somewhere, and specify its path during the Meson
-configuration:
-
-```bash
-meson x --buildtype release --strip -Db_lto=true \
-    -Dprebuilt_server=/path/to/scrcpy-server.jar
-cd x
-ninja
-sudo ninja install
-```
--- a/FAQ.md
+++ b/FAQ.md
@@ -7,8 +7,29 @@ with it.

 Here are the common reported problems and their status.

+### On Windows, I have no output in the console

-### On Windows, my device is not detected
+When run in `cmd.exe`, the application does not print anything. Even `scrcpy
+--help` have no output. We don't know why yet.
+
+However, if you run the very same `scrcpy.exe` from
+[MSYS2](https://www.msys2.org/) (`mingw64`), then it correctly prints output.
+
+As a workaround, redirect outputs to files, so that you can read the files
+afterwards:
+
+```bash
+scrcpy >stdout 2>stderr
+type stdout
+type stderr
+```
+
+_Note that all SDL logs are printed to stderr._
+
+
+### On Windows, when I start the application, nothing happens
+
+The previous problem does not help to get a clue about the cause.

 The most common is your device not being detected by `adb`, or is unauthorized.
 Check everything is ok by calling:
@@ -26,11 +47,10 @@ If you still encounter problems, please see [issue 9].

 ### I get a black screen for some applications like Silence

-This is expected, they requested to [protect] the screen.
+This is expected, they requested to protect the screen.

 In [Silence], you can disable it in settings → Privacy → Screen security.

-[protect]: https://developer.android.com/reference/android/view/Display#FLAG_SECURE
 [silence]: https://f-droid.org/en/packages/org.smssecure.smssecure/

 See [issue 36].
--- a/65
+++ b/65
@@ -0,0 +1,65 @@
+# This makefile provides recipes to build a "portable" version of scrcpy.
+#
+# Here, "portable" means that the client and server binaries are expected to be
+# anywhere, but in the same directory, instead of well-defined separate
+# locations (e.g. /usr/bin/scrcpy and /usr/share/scrcpy/scrcpy-server.jar).
+#
+# In particular, this implies to change the location from where the client push
+# the server to the device.
+#
+# "make release-portable" builds a zip containing the client and the server.
+#
+# On Windows with MSYS2/mingw64, execute:
+#     GRADLE="$PWD/gradlew" mingw32-make release-portable
+#
+# This is a simple Makefile because Meson is not flexible enough to execute some
+# arbitrary commands.
+
+.PHONY: default clean build-portable release-portable dist-portable dist-portable-zip sums test check
+
+GRADLE ?= ./gradlew
+
+PORTABLE_BUILD_DIR := build-portable
+DIST := dist
+TARGET_DIR := scrcpy
+
+VERSION := $(shell git describe --tags --always)
+TARGET := $(TARGET_DIR)-$(VERSION).zip
+
+default:
+	@echo 'You must specify a target. Try: make release-portable'
+
+clean:
+	$(GRADLE) clean
+	rm -rf "$(PORTABLE_BUILD_DIR)" "$(DIST)"
+
+build-portable:
+	[ -d "$(PORTABLE_BUILD_DIR)" ] || ( mkdir "$(PORTABLE_BUILD_DIR)" && \
+		meson "$(PORTABLE_BUILD_DIR)" \
+			--buildtype release --strip -Db_lto=true \
+			-Doverride_server_path=scrcpy-server.jar )
+	ninja -C "$(PORTABLE_BUILD_DIR)"
+
+release-portable: clean dist-portable-zip sums
+	@echo "Release created in $(DIST)/."
+
+dist-portable: build-portable
+	mkdir -p "$(DIST)/$(TARGET_DIR)"
+	cp "$(PORTABLE_BUILD_DIR)"/server/scrcpy-server.jar "$(DIST)/$(TARGET_DIR)/"
+	cp "$(PORTABLE_BUILD_DIR)"/app/scrcpy "$(DIST)/$(TARGET_DIR)/"
+
+dist-portable-zip: dist-portable
+	cd "$(DIST)"; \
+		zip -r "$(TARGET)" "$(TARGET_DIR)"
+
+sums:
+	cd "$(DIST)"; \
+		sha256sum *.zip > SHA256SUM.txt
+
+test: build-portable
+	$(GRADLE) test
+	ninja -C "$(PORTABLE_BUILD_DIR)" test
+
+check: build-portable
+	$(GRADLE) check
+	ninja -C "$(PORTABLE_BUILD_DIR)" test
--- a/Makefile.CrossWindows
+++ b/Makefile.CrossWindows
@@ -1,136 +0,0 @@
-# This makefile provides recipes to build a "portable" version of scrcpy for
-# Windows.
-#
-# Here, "portable" means that the client and server binaries are expected to be
-# anywhere, but in the same directory, instead of well-defined separate
-# locations (e.g. /usr/bin/scrcpy and /usr/share/scrcpy/scrcpy-server.jar).
-#
-# In particular, this implies to change the location from where the client push
-# the server to the device.
-
-.PHONY: default clean \
-	build-server \
-	prepare-deps-win32 prepare-deps-win64 \
-	build-win32 build-win32-noconsole \
-	build-win64 build-win64-noconsole \
-	dist-win32 dist-win64 \
-	zip-win32 zip-win64 \
-	sums release
-
-GRADLE ?= ./gradlew
-
-SERVER_BUILD_DIR := build-server
-WIN32_BUILD_DIR := build-win32
-WIN32_NOCONSOLE_BUILD_DIR := build-win32-noconsole
-WIN64_BUILD_DIR := build-win64
-WIN64_NOCONSOLE_BUILD_DIR := build-win64-noconsole
-
-DIST := dist
-WIN32_TARGET_DIR := scrcpy-win32
-WIN64_TARGET_DIR := scrcpy-win64
-
-VERSION := $(shell git describe --tags --always)
-WIN32_TARGET := $(WIN32_TARGET_DIR)-$(VERSION).zip
-WIN64_TARGET := $(WIN64_TARGET_DIR)-$(VERSION).zip
-
-release: clean zip-win32 zip-win64 sums
-	@echo "Release created in $(DIST)/."
-
-clean:
-	$(GRADLE) clean
-	rm -rf "$(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 "$(SERVER_BUILD_DIR)" && \
-		meson "$(SERVER_BUILD_DIR)" \
-			--buildtype release -Dbuild_app=false )
-		ninja -C "$(SERVER_BUILD_DIR)"
-
-prepare-deps-win32:
-	-$(MAKE) -C prebuilt-deps prepare-win32
-
-build-win32: prepare-deps-win32
-	[ -d "$(WIN32_BUILD_DIR)" ] || ( mkdir "$(WIN32_BUILD_DIR)" && \
-		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)"
-
-build-win32-noconsole: prepare-deps-win32
-	[ -d "$(WIN32_NOCONSOLE_BUILD_DIR)" ] || ( mkdir "$(WIN32_NOCONSOLE_BUILD_DIR)" && \
-		meson "$(WIN32_NOCONSOLE_BUILD_DIR)" \
-			--cross-file cross_win32.txt \
-			--buildtype release --strip -Db_lto=true \
-			-Dcrossbuild_windows=true \
-			-Dbuild_server=false \
-			-Dwindows_noconsole=true \
-			-Doverride_server_path=scrcpy-server.jar )
-	ninja -C "$(WIN32_NOCONSOLE_BUILD_DIR)"
-
-prepare-deps-win64:
-	-$(MAKE) -C prebuilt-deps prepare-win64
-
-build-win64: prepare-deps-win64
-	[ -d "$(WIN64_BUILD_DIR)" ] || ( mkdir "$(WIN64_BUILD_DIR)" && \
-		meson "$(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 "$(WIN64_BUILD_DIR)"
-
-build-win64-noconsole: prepare-deps-win64
-	[ -d "$(WIN64_NOCONSOLE_BUILD_DIR)" ] || ( mkdir "$(WIN64_NOCONSOLE_BUILD_DIR)" && \
-		meson "$(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 )
-	ninja -C "$(WIN64_NOCONSOLE_BUILD_DIR)"
-
-dist-win32: build-server build-win32 build-win32-noconsole
-	mkdir -p "$(DIST)/$(WIN32_TARGET_DIR)"
-	cp "$(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-4.0.2-win32-shared/bin/avutil-56.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-4.0.2-win32-shared/bin/avformat-58.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)/"
-	cp prebuilt-deps/SDL2-2.0.8/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)/$(WIN64_TARGET_DIR)/scrcpy-noconsole.exe"
-	cp prebuilt-deps/ffmpeg-4.0.2-win64-shared/bin/avutil-56.dll "$(DIST)/$(WIN64_TARGET_DIR)/"
-	cp prebuilt-deps/ffmpeg-4.0.2-win64-shared/bin/avcodec-58.dll "$(DIST)/$(WIN64_TARGET_DIR)/"
-	cp prebuilt-deps/ffmpeg-4.0.2-win64-shared/bin/avformat-58.dll "$(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)/$(WIN64_TARGET_DIR)/"
-	cp prebuilt-deps/SDL2-2.0.8/x86_64-w64-mingw32/bin/SDL2.dll "$(DIST)/$(WIN64_TARGET_DIR)/"
-
-zip-win32: dist-win32
-	cd "$(DIST)"; \
-		zip -r "$(WIN32_TARGET)" "$(WIN32_TARGET_DIR)"
-
-zip-win64: dist-win64
-	cd "$(DIST)"; \
-		zip -r "$(WIN64_TARGET)" "$(WIN64_TARGET_DIR)"
-
-sums:
-	cd "$(DIST)"; \
-		sha256sum *.zip > SHA256SUMS.txt
--- a/README.md
+++ b/README.md
@@ -1,8 +1,8 @@
-# scrcpy (v1.4)
+# scrcpy

 This application provides display and control of Android devices connected on
-USB (or [over TCP/IP][article-tcpip]). It does not require any _root_ access.
-It works on _GNU/Linux_, _Windows_ and _MacOS_.
+USB. It does not require any _root_ access. It works on _GNU/Linux_, _Windows_
+and _MacOS_.

 ![screenshot](assets/screenshot-debian-600.jpg)

@@ -11,49 +11,126 @@ It works on _GNU/Linux_, _Windows_ and _MacOS_.

 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
+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], [LibSDL2] and [LibUSB].
+
+[adb]: https://developer.android.com/studio/command-line/adb.html
 [enable-adb]: https://developer.android.com/studio/command-line/adb.html#Enabling
+[platform-tools]: https://developer.android.com/studio/releases/platform-tools.html
+[platform-tools-windows]: https://dl.google.com/android/repository/platform-tools-latest-windows.zip
+[ffmpeg]: https://en.wikipedia.org/wiki/FFmpeg
+[libsdl2]: https://en.wikipedia.org/wiki/Simple_DirectMedia_Layer
+[libusb]: https://en.wikipedia.org/wiki/Libusb

+## Build and install

-## Get the app
+### System-specific steps

+#### Linux

-### Linux
+Install the required packages from your package manager.

-On Linux, you typically need to [build the app manually][BUILD]. Don't worry,
-it's not that hard.
+##### Debian/Ubuntu

-For Arch Linux, two [AUR] packages have been created by users:
+```bash
+# runtime dependencies
+sudo apt install ffmpeg libsdl2-2.0.0 libusb-1.0-0
+
+# client build dependencies
+sudo apt install make gcc pkg-config meson \
+                 libavcodec-dev libavformat-dev libavutil-dev \
+                 libsdl2-dev libusb-1.0-0-dev
+
+# server build dependencies
+sudo apt install openjdk-8-jdk
+```
+
+##### Fedora
+
+```bash
+# enable RPM fusion free
+sudo dnf install https://download1.rpmfusion.org/free/fedora/rpmfusion-free-release-$(rpm -E %fedora).noarch.rpm
+
+# client build dependencies
+sudo dnf install SDL2-devel ffms2-devel meson gcc make
+
+# server build dependencies
+sudo dnf install java
+```
+
+##### Arch Linux
+
+Two [AUR] packages have been created by users:

 - [`scrcpy`](https://aur.archlinux.org/packages/scrcpy/)
 - [`scrcpy-prebuiltserver`](https://aur.archlinux.org/packages/scrcpy-prebuiltserver/)

 [AUR]: https://wiki.archlinux.org/index.php/Arch_User_Repository

-For Gentoo, an [Ebuild] is available: [`scrcpy/`][ebuild-link].

-[Ebuild]: https://wiki.gentoo.org/wiki/Ebuild
-[ebuild-link]: https://github.com/maggu2810/maggu2810-overlay/tree/master/app-mobilephone/scrcpy
+#### Windows

+For Windows, for simplicity, a prebuilt archive with all the dependencies
+(including `adb`) is available:

-### Windows
+ - [`scrcpy-windows-with-deps-v1.1.zip`][direct-windows-with-deps].  
+   _(SHA-256: 27eb36c15937601d1062c1dc0b45faae0e06fefea2019aadeb4fa7f76a07bb4c)_

-For Windows, for simplicity, prebuilt archives with all the dependencies
-(including `adb`) are available:
+[direct-windows-with-deps]: https://github.com/Genymobile/scrcpy/releases/download/v1.1/scrcpy-windows-with-deps-v1.1.zip

- - [`scrcpy-win32-v1.4.zip`][direct-win32]  
-   _(SHA-256: 1f72fa520980727e8943b7214b64c66b00b9b5267f7cffefb64fa37c3ca803cf)_
- - [`scrcpy-win64-v1.4.zip`][direct-win64]  
-   _(SHA-256: 382f02bd8ed3db2cc7ab15aabdb83674744993b936d602b01e6959a150584a79)_
+_(It's just a portable version including _dll_ copied from MSYS2.)_

-[direct-win32]: https://github.com/Genymobile/scrcpy/releases/download/v1.4/scrcpy-win32-v1.4.zip
-[direct-win64]: https://github.com/Genymobile/scrcpy/releases/download/v1.4/scrcpy-win64-v1.4.zip
+Instead, you may want to build it manually. You need [MSYS2] to build the
+project. From an MSYS2 terminal, install the required packages:

-You can also [build the app manually][BUILD].
+[MSYS2]: http://www.msys2.org/

+```bash
+# runtime dependencies
+pacman -S mingw-w64-x86_64-SDL2 \
+          mingw-w64-x86_64-ffmpeg

-### Mac OS
+# client build dependencies
+pacman -S mingw-w64-x86_64-make \
+          mingw-w64-x86_64-gcc \
+          mingw-w64-x86_64-pkg-config \
+          mingw-w64-x86_64-meson \
+          mingw-w64-x86_64-libusb
+```
+
+For a 32 bits version, replace `x86_64` by `i686`:
+
+```bash
+# runtime dependencies
+pacman -S mingw-w64-i686-SDL2 \
+          mingw-w64-i686-ffmpeg
+
+# client build dependencies
+pacman -S mingw-w64-i686-make \
+          mingw-w64-i686-gcc \
+          mingw-w64-i686-pkg-config \
+          mingw-w64-i686-meson
+```
+
+Java (>= 7) is not available in MSYS2, so if you plan to build the server,
+install it manually and make it available from the `PATH`:
+
+```bash
+export PATH="$JAVA_HOME/bin:$PATH"
+```
+
+#### Mac OS

 The application is available in [Homebrew]. Just install it:

@@ -63,18 +140,106 @@ The application is available in [Homebrew]. Just install it:
 brew install scrcpy
 ```

-You need `adb`, accessible from your `PATH`. If you don't have it yet:
+Instead, you may want to build it manually. Install the packages:
+

 ```bash
-brew cask install android-platform-tools
+# runtime dependencies
+brew install sdl2 ffmpeg
+
+# client build dependencies
+brew install pkg-config meson libusb
 ```

-You can also [build the app manually][BUILD].
+Additionally, if you want to build the server, install Java 8 from Caskroom, and
+make it avaliable from the `PATH`:

+```bash
+brew tap caskroom/versions
+brew cask install java8
+export JAVA_HOME="$(/usr/libexec/java_home --version 1.8)"
+export PATH="$JAVA_HOME/bin:$PATH"
+```
+
+#### Docker
+
+See [pierlon/scrcpy-docker](https://github.com/pierlon/scrcpy-docker).
+
+### Common steps
+
+Install the [Android SDK] (_Android Studio_), and set `ANDROID_HOME` to
+its directory. For example:
+
+[Android SDK]: https://developer.android.com/studio/index.html
+
+```bash
+export ANDROID_HOME=~/android/sdk
+```
+
+Clone the project:
+
+```bash
+git clone https://github.com/Genymobile/scrcpy
+cd scrcpy
+```
+
+Then, build:
+
+```bash
+meson x --buildtype release --strip -Db_lto=true
+cd x
+ninja
+```
+
+You can test it from here:
+
+```bash
+ninja run
+```
+
+Or you can install it on the system:
+
+```bash
+sudo ninja install    # without sudo on Windows
+```
+
+This installs two files:
+
+ - `/usr/local/bin/scrcpy`
+ - `/usr/local/share/scrcpy/scrcpy-server.jar`
+
+Just remove them to "uninstall" the application.
+
+
+#### Prebuilt server
+
+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].  
+   _(SHA-256: 14826512bf38447ec94adf3b531676ce038d19e7e06757fb4e537882b17e77b3)_
+
+[direct-scrcpy-server]: https://github.com/Genymobile/scrcpy/releases/download/v1.1/scrcpy-server-v1.1.jar
+
+In that case, the build does not require Java or the Android SDK.
+
+Download the prebuilt server somewhere, and specify its path during the Meson
+configuration:
+
+```bash
+meson x --buildtype release --strip -Db_lto=true \
+    -Dprebuilt_server=/path/to/scrcpy-server.jar
+cd x
+ninja
+sudo ninja install
+```

 ## Run

-Plug an Android device, and execute:
+_At runtime, `adb` must be accessible from your `PATH`._
+
+If everything is ok, just plug an Android device, and execute:

 ```bash
 scrcpy
@@ -99,12 +264,6 @@ 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
@@ -117,12 +276,21 @@ To show physical touches while scrcpy is running:
 scrcpy -t
 ```

-The app may be started directly in fullscreen:
+To enable audio forwarding:

+```bash
+scrcpy -a
 ```
-scrcpy -f
+
+To run without installing:
+
+```bash
+./run x [options]
 ```

+(where `x` is your build directory).
+
+
 ## Shortcuts

 | Action                                 |   Shortcut                    |
@@ -134,14 +302,12 @@ scrcpy -f
 | click on `BACK`                        | `Ctrl`+`b` \| _Right-click²_  |
 | click on `APP_SWITCH`                  | `Ctrl`+`s`                    |
 | click on `MENU`                        | `Ctrl`+`m`                    |
- | click on `VOLUME_UP`                   | `Ctrl`+`↑` _(up)_   (`Cmd`+`↑` on MacOS) |
- | click on `VOLUME_DOWN`                 | `Ctrl`+`↓` _(down)_ (`Cmd`+`↓` on MacOS) |
+ | click on `VOLUME_UP`                   | `Ctrl`+`↑` _(up)_             |
+ | click on `VOLUME_DOWN`                 | `Ctrl`+`↓` _(down)_           |
 | click on `POWER`                       | `Ctrl`+`p`                    |
 | 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._
@@ -157,13 +323,6 @@ A colleague challenged me to find a name as unpronounceable as [gnirehtet].
 [`strcpy`]: http://man7.org/linux/man-pages/man3/strcpy.3.html


-## How to build?
-
-See [BUILD].
-
-[BUILD]: BUILD.md
-
-
 ## Common issues

 See the [FAQ](FAQ.md).
@@ -194,8 +353,5 @@ Read the [developers page].

 ## Articles

- [Introducing scrcpy][article-intro]
- [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/
+- [Introducing scrcpy](https://blog.rom1v.com/2018/03/introducing-scrcpy/)
+- [Scrcpy now works wirelessly](https://www.genymotion.com/blog/open-source-project-scrcpy-now-works-wirelessly/)
--- a/app/meson.build
+++ b/app/meson.build
@@ -1,71 +1,39 @@
 src = [
    'src/main.c',
    'src/command.c',
-    'src/control_event.c',
+    'src/controlevent.c',
    'src/controller.c',
    'src/convert.c',
    'src/decoder.c',
    'src/device.c',
-    'src/file_handler.c',
-    'src/fps_counter.c',
+    'src/fpscounter.c',
    'src/frames.c',
-    'src/input_manager.c',
-    'src/lock_util.c',
+    'src/inputmanager.c',
+    'src/lockutil.c',
    'src/net.c',
    'src/scrcpy.c',
    'src/screen.c',
    'src/server.c',
-    'src/str_util.c',
-    'src/tiny_xpm.c',
+    'src/strutil.c',
+    'src/tinyxpm.c',
 ]

-if not get_option('crossbuild_windows')
-
-    # native build
-    dependencies = [
-        dependency('libavformat'),
-        dependency('libavcodec'),
-        dependency('libavutil'),
-        dependency('sdl2'),
+if get_option('audio_support')
+    src += [
+        'src/aoa.c',
+        'src/audio.c'
    ]
+endif

-else
-
-    # cross-compile mingw32 build (from Linux to Windows)
-    cc = meson.get_compiler('c')
-
-    prebuilt_sdl2 = meson.get_cross_property('prebuilt_sdl2')
-    sdl2_bin_dir = meson.current_source_dir() + '/../prebuilt-deps/' + prebuilt_sdl2 + '/bin'
-    sdl2_lib_dir = meson.current_source_dir() + '/../prebuilt-deps/' + prebuilt_sdl2 + '/lib'
-    sdl2_include_dir = '../prebuilt-deps/' + prebuilt_sdl2 + '/include'
-
-    sdl2 = declare_dependency(
-        dependencies: [
-            cc.find_library('SDL2', dirs: sdl2_bin_dir),
-            cc.find_library('SDL2main', dirs: sdl2_lib_dir),
-        ],
-        include_directories: include_directories(sdl2_include_dir)
-    )
-
-    prebuilt_ffmpeg_shared = meson.get_cross_property('prebuilt_ffmpeg_shared')
-    prebuilt_ffmpeg_dev = meson.get_cross_property('prebuilt_ffmpeg_dev')
-    ffmpeg_bin_dir = meson.current_source_dir() + '/../prebuilt-deps/' + prebuilt_ffmpeg_shared + '/bin'
-    ffmpeg_include_dir = '../prebuilt-deps/' + prebuilt_ffmpeg_dev + '/include'
-    ffmpeg = declare_dependency(
-        dependencies: [
-            cc.find_library('avcodec-58', dirs: ffmpeg_bin_dir),
-            cc.find_library('avformat-58', dirs: ffmpeg_bin_dir),
-            cc.find_library('avutil-56', dirs: ffmpeg_bin_dir),
-        ],
-        include_directories: include_directories(ffmpeg_include_dir)
-    )
-
-    dependencies = [
-        ffmpeg,
-        sdl2,
-        cc.find_library('mingw32')
-    ]
+dependencies = [
+    dependency('libavformat'),
+    dependency('libavcodec'),
+    dependency('libavutil'),
+    dependency('sdl2'),
+]

+if get_option('audio_support')
+    dependencies += dependency('libusb-1.0')
 endif

 cc = meson.get_compiler('c')
@@ -85,7 +53,7 @@ conf = configuration_data()
 conf.set('BUILD_DEBUG', get_option('buildtype') == 'debug')

 # the version, updated on release
-conf.set_quoted('SCRCPY_VERSION', '1.4')
+conf.set_quoted('SCRCPY_VERSION', '1.1')

 # the prefix used during configuration (meson --prefix=PREFIX)
 conf.set_quoted('PREFIX', get_option('prefix'))
@@ -126,30 +94,21 @@ 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'))
+# enable audio support (enable audio forwarding with --forward-audio)
+conf.set('AUDIO_SUPPORT', get_option('audio_support'))

 configure_file(configuration: conf, output: 'config.h')

 src_dir = include_directories('src')
-
-if get_option('windows_noconsole')
-    c_args = [ '-mwindows' ]
-    link_args = [ '-mwindows' ]
-else
-    c_args = []
-    link_args = []
-endif
-
-executable('scrcpy', src, dependencies: dependencies, include_directories: src_dir, install: true, c_args: c_args, link_args: link_args)
+executable('scrcpy', src, dependencies: dependencies, include_directories: src_dir, install: true)


 ### TESTS

 tests = [
-    ['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/control_event.c']],
-    ['test_strutil', ['tests/test_strutil.c', 'src/str_util.c']],
+    ['test_control_event_queue', ['tests/test_control_event_queue.c', 'src/controlevent.c']],
+    ['test_control_event_serialize', ['tests/test_control_event_serialize.c', 'src/controlevent.c']],
+    ['test_strutil', ['tests/test_strutil.c', 'src/strutil.c']],
 ]

 foreach t : tests
--- a/app/src/android/input.h
+++ b/app/src/android/input.h
@@ -777,6 +777,9 @@ 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,
 };

 /**
--- a/app/src/aoa.c
+++ b/app/src/aoa.c
@@ -0,0 +1,206 @@
+#include "aoa.h"
+
+#include "command.h" // must be first to include "winsock2.h" before "windows.h"
+#include <libusb-1.0/libusb.h>
+#include "log.h"
+
+// <https://source.android.com/devices/accessories/aoa2>
+#define AOA_GET_PROTOCOL     51
+#define AOA_START_ACCESSORY  53
+#define AOA_SET_AUDIO_MODE   58
+
+#define AUDIO_MODE_NO_AUDIO               0
+#define AUDIO_MODE_S16LSB_STEREO_44100HZ  1
+
+#define DEFAULT_TIMEOUT 1000
+
+typedef struct control_params {
+    uint8_t request_type;
+    uint8_t request;
+    uint16_t value;
+    uint16_t index;
+    unsigned char *data;
+    uint16_t length;
+    unsigned int timeout;
+} control_params;
+
+static void log_libusb_error(enum libusb_error errcode) {
+    LOGE("%s", libusb_strerror(errcode));
+}
+
+static SDL_bool control_transfer(libusb_device_handle *handle, control_params *params) {
+    int r = libusb_control_transfer(handle,
+                                    params->request_type,
+                                    params->request,
+                                    params->value,
+                                    params->index,
+                                    params->data,
+                                    params->length,
+                                    params->timeout);
+    if (r < 0) {
+        log_libusb_error(r);
+        return SDL_FALSE;
+    }
+    return SDL_TRUE;
+}
+
+static SDL_bool get_serial(libusb_device *device, struct libusb_device_descriptor *desc, unsigned char *data, int length) {
+
+    libusb_device_handle *handle;
+    int r;
+    if ((r = libusb_open(device, &handle))) {
+        // silently ignore
+        LOGD("USB: cannot open device %04x:%04x (%s)", desc->idVendor, desc->idProduct, libusb_strerror(r));
+        return SDL_FALSE;
+    }
+
+    if (!desc->iSerialNumber) {
+        LOGD("USB: device %04x:%04x has no serial number available", desc->idVendor, desc->idProduct);
+        libusb_close(handle);
+        return SDL_FALSE;
+    }
+
+    if ((r = libusb_get_string_descriptor_ascii(handle, desc->iSerialNumber, data, length)) <= 0) {
+        // silently ignore
+        LOGD("USB: cannot read serial of device %04x:%04x (%s)", desc->idVendor, desc->idProduct, libusb_strerror(r));
+        libusb_close(handle);
+        return SDL_FALSE;
+    }
+    data[length - 1] = '\0'; // just in case
+
+    libusb_close(handle);
+    return SDL_TRUE;
+}
+
+static libusb_device *find_device(const char *serial) {
+    libusb_device **list;
+    libusb_device *found = NULL;
+    ssize_t cnt = libusb_get_device_list(NULL, &list);
+    ssize_t i = 0;
+    if (cnt < 0) {
+        log_libusb_error(cnt);
+        return NULL;
+    }
+    for (i = 0; i < cnt; ++i) {
+        libusb_device *device = list[i];
+
+        struct libusb_device_descriptor desc;
+        libusb_get_device_descriptor(device, &desc);
+
+        char usb_serial[128];
+        if (get_serial(device, &desc, (unsigned char *) usb_serial, sizeof(usb_serial))) {
+            if (!strncmp(serial, usb_serial, sizeof(usb_serial))) {
+                libusb_ref_device(device);
+                found = device;
+                LOGD("USB device with serial %s found: %04x:%04x", serial, desc.idVendor, desc.idProduct);
+                break;
+            }
+        }
+    }
+    libusb_free_device_list(list, 1);
+    return found;
+}
+
+static SDL_bool aoa_get_protocol(libusb_device_handle *handle, uint16_t *version) {
+    unsigned char data[2];
+    control_params params = {
+        .request_type = LIBUSB_ENDPOINT_IN | LIBUSB_REQUEST_TYPE_VENDOR,
+        .request = AOA_GET_PROTOCOL,
+        .value = 0,
+        .index = 0,
+        .data = data,
+        .length = sizeof(data),
+        .timeout = DEFAULT_TIMEOUT
+    };
+    if (control_transfer(handle, &params)) {
+        // little endian
+        *version = (data[1] << 8) | data[0];
+        return SDL_TRUE;
+    }
+    return SDL_FALSE;
+}
+
+static SDL_bool set_audio_mode(libusb_device_handle *handle, uint16_t mode) {
+    control_params params = {
+        .request_type = LIBUSB_ENDPOINT_OUT | LIBUSB_REQUEST_TYPE_VENDOR,
+        .request = AOA_SET_AUDIO_MODE,
+        // <https://source.android.com/devices/accessories/aoa2.html#audio-support>
+        .value = mode,
+        .index = 0, // unused
+        .data = NULL,
+        .length = 0,
+        .timeout = DEFAULT_TIMEOUT
+    };
+    return control_transfer(handle, &params);
+}
+
+static SDL_bool start_accessory(libusb_device_handle *handle) {
+    control_params params = {
+        .request_type = LIBUSB_ENDPOINT_OUT | LIBUSB_REQUEST_TYPE_VENDOR,
+        .request = AOA_START_ACCESSORY,
+        .value = 0, // unused
+        .index = 0, // unused
+        .data = NULL,
+        .length = 0,
+        .timeout = DEFAULT_TIMEOUT
+    };
+    return control_transfer(handle, &params);
+}
+
+SDL_bool aoa_init(void) {
+    return !libusb_init(NULL);
+}
+
+void aoa_exit(void) {
+    libusb_exit(NULL);
+}
+
+SDL_bool aoa_forward_audio(const char *serial, SDL_bool forward) {
+    LOGD("%s audio accessory...", forward ? "Enabling" : "Disabling");
+    libusb_device *device = find_device(serial);
+    if (!device) {
+        LOGE("Cannot find USB device having serial %s", serial);
+        return SDL_FALSE;
+    }
+
+    SDL_bool ret = SDL_FALSE;
+
+    libusb_device_handle *handle;
+    int r = libusb_open(device, &handle);
+    if (r) {
+        log_libusb_error(r);
+        goto finally_unref_device;
+    }
+
+    uint16_t version;
+    if (!aoa_get_protocol(handle, &version)) {
+        LOGE("Cannot get AOA protocol version");
+        goto finally_close_handle;
+    }
+
+    LOGD("Device AOA version: %" PRIu16 "\n", version);
+    if (version < 2) {
+        LOGE("Device does not support AOA 2: %" PRIu16, version);
+        goto finally_close_handle;
+    }
+
+    uint16_t mode = forward ? AUDIO_MODE_S16LSB_STEREO_44100HZ : AUDIO_MODE_NO_AUDIO;
+    if (!set_audio_mode(handle, mode)) {
+        LOGE("Cannot set audio mode: %" PRIu16, mode);
+        goto finally_close_handle;
+    }
+
+    if (!start_accessory(handle)) {
+        LOGE("Cannot start accessory");
+        return SDL_FALSE;
+    }
+
+    ret = SDL_TRUE;
+
+finally_close_handle:
+    libusb_close(handle);
+finally_unref_device:
+    libusb_unref_device(device);
+
+    return ret;
+}
--- a/app/src/aoa.h
+++ b/app/src/aoa.h
@@ -0,0 +1,15 @@
+#ifndef AOA_H
+#define AOA_H
+
+#include <SDL2/SDL_stdinc.h>
+
+#define AUDIO_MODE_NO_AUDIO               0
+#define AUDIO_MODE_S16LSB_STEREO_44100HZ  1
+
+SDL_bool aoa_init(void);
+void aoa_exit(void);
+
+// serial must not be NULL
+SDL_bool aoa_forward_audio(const char *serial, SDL_bool forward);
+
+#endif
--- a/app/src/audio.c
+++ b/app/src/audio.c
@@ -0,0 +1,205 @@
+#include "audio.h"
+
+#include <SDL2/SDL.h>
+#include "aoa.h"
+#include "command.h"
+#include "log.h"
+
+SDL_bool sdl_audio_init(void) {
+    if (SDL_InitSubSystem(SDL_INIT_AUDIO)) {
+        LOGC("Could not initialize SDL audio: %s", SDL_GetError());
+        return SDL_FALSE;
+    }
+    return SDL_TRUE;
+}
+
+static void init_audio_spec(SDL_AudioSpec *spec) {
+    SDL_zero(*spec);
+    spec->freq = 44100;
+    spec->format = AUDIO_S16LSB;
+    spec->channels = 2;
+    spec->samples = 1024;
+}
+
+SDL_bool audio_player_init(struct audio_player *player, const char *serial) {
+    player->serial = SDL_strdup(serial);
+    return !!player->serial;
+}
+
+void audio_player_destroy(struct audio_player *player) {
+    SDL_free((void *) player->serial);
+}
+
+static void audio_input_callback(void *userdata, Uint8 *stream, int len) {
+    struct audio_player *player = userdata;
+    if (SDL_QueueAudio(player->output_device, stream, len)) {
+        LOGE("Cannot queue audio: %s", SDL_GetError());
+    }
+}
+
+static int get_matching_audio_device(const char *serial, int count) {
+    for (int i = 0; i < count; ++i) {
+        LOGD("Audio input #%d: %s", i, SDL_GetAudioDeviceName(i, 1));
+    }
+
+    char model[128];
+    int r = adb_read_model(serial, model, sizeof(model));
+    if (r <= 0) {
+        LOGE("Cannot read Android device model");
+        return -1;
+    }
+
+    LOGD("Device model is: %s", model);
+
+    // iterate backwards since the matching device is probably the last one
+    for (int i = count - 1; i >= 0; i--) {
+        // model is a NUL-terminated string
+        const char *name = SDL_GetAudioDeviceName(i, 1);
+        if (strstr(name, model)) {
+            // the device name contains the device model, we found it!
+            return i;
+        }
+    }
+    return -1;
+}
+
+static SDL_AudioDeviceID open_accessory_audio_input(struct audio_player *player) {
+    int count = SDL_GetNumAudioDevices(1);
+    if (!count) {
+        LOGE("No audio input source found");
+        return 0;
+    }
+
+    int selected = get_matching_audio_device(player->serial, count);
+    if (selected == -1) {
+        LOGE("Cannot find the Android accessory audio input source");
+        return 0;
+    }
+
+    const char *selected_name = SDL_GetAudioDeviceName(selected, 1);
+    LOGI("Selecting audio input source: %s", selected_name);
+
+    SDL_AudioSpec spec;
+    init_audio_spec(&spec);
+    spec.callback = audio_input_callback;
+    spec.userdata = player;
+
+    int id = SDL_OpenAudioDevice(selected_name, 1, &spec, NULL, 0);
+    if (!id) {
+        LOGE("Cannot open audio input: %s", SDL_GetError());
+    }
+    return id;
+}
+
+static SDL_AudioDeviceID open_default_audio_output() {
+    SDL_AudioSpec spec;
+    init_audio_spec(&spec);
+    int id = SDL_OpenAudioDevice(NULL, 0, &spec, NULL, 0);
+    if (!id) {
+        LOGE("Cannot open audio output: %s", SDL_GetError());
+    }
+    return id;
+}
+
+SDL_bool audio_player_open(struct audio_player *player) {
+    player->output_device = open_default_audio_output();
+    if (!player->output_device) {
+        return SDL_FALSE;
+    }
+
+    player->input_device = open_accessory_audio_input(player);
+    if (!player->input_device) {
+        SDL_CloseAudioDevice(player->output_device);
+        return SDL_FALSE;
+    }
+
+    return SDL_TRUE;
+}
+
+static void audio_player_set_paused(struct audio_player *player, SDL_bool paused) {
+    SDL_PauseAudioDevice(player->input_device, paused);
+    SDL_PauseAudioDevice(player->output_device, paused);
+}
+
+void audio_player_play(struct audio_player *player) {
+    audio_player_set_paused(player, SDL_FALSE);
+}
+
+void audio_player_pause(struct audio_player *player) {
+    audio_player_set_paused(player, SDL_TRUE);
+}
+
+void audio_player_close(struct audio_player *player) {
+    SDL_CloseAudioDevice(player->input_device);
+    SDL_CloseAudioDevice(player->output_device);
+}
+
+SDL_bool audio_forwarding_start(struct audio_player *player, const char *serial) {
+    if (!aoa_init()) {
+        LOGE("Cannot initialize AOA");
+        return SDL_FALSE;
+    }
+
+    char serialno[128];
+    if (!serial) {
+        LOGD("No serial provided, request it to the device");
+        int r = adb_read_serialno(NULL, serialno, sizeof(serialno));
+        if (r <= 0) {
+            LOGE("Cannot read serial from the device");
+            goto error_aoa_exit;
+        }
+        LOGD("Device serial is %s", serialno);
+        serial = serialno;
+    }
+
+    if (!audio_player_init(player, serial)) {
+        LOGE("Cannot initialize audio player");
+        goto error_aoa_exit;
+    }
+
+    // adb connection will be reset!
+    if (!aoa_forward_audio(player->serial, SDL_TRUE)) {
+        LOGE("AOA audio forwarding failed");
+        goto error_destroy_player;
+    }
+
+    LOGI("Audio accessory enabled");
+
+    if (!sdl_audio_init()) {
+        goto error_disable_audio_forwarding;
+    }
+
+    LOGI("Waiting 2s for USB reconfiguration...");
+    SDL_Delay(2000);
+
+    if (!audio_player_open(player)) {
+        goto error_disable_audio_forwarding;
+    }
+
+    audio_player_play(player);
+    return SDL_TRUE;
+
+error_disable_audio_forwarding:
+    if (!aoa_forward_audio(serial, SDL_FALSE)) {
+        LOGW("Cannot disable audio forwarding");
+    }
+error_destroy_player:
+    audio_player_destroy(player);
+error_aoa_exit:
+    aoa_exit();
+
+    return SDL_FALSE;
+}
+
+void audio_forwarding_stop(struct audio_player *player) {
+    audio_player_close(player);
+
+    if (aoa_forward_audio(player->serial, SDL_FALSE)) {
+        LOGI("Audio forwarding disabled");
+    } else {
+        LOGW("Cannot disable audio forwarding");
+    }
+    aoa_exit();
+
+    audio_player_destroy(player);
+}
--- a/app/src/audio.h
+++ b/app/src/audio.h
@@ -0,0 +1,29 @@
+#ifndef AUDIO_H
+#define AUDIO_H
+
+#include <SDL2/SDL_audio.h>
+#include <SDL2/SDL_stdinc.h>
+
+struct audio_player {
+    const char *serial;
+    SDL_AudioDeviceID input_device;
+    SDL_AudioDeviceID output_device;
+};
+
+SDL_bool sdl_audio_init(void);
+
+// serial must not be NULL
+SDL_bool audio_player_init(struct audio_player *player, const char *serial);
+void audio_player_destroy(struct audio_player *player);
+
+SDL_bool audio_player_open(struct audio_player *player);
+void audio_player_close(struct audio_player *player);
+
+void audio_player_play(struct audio_player *player);
+void audio_player_pause(struct audio_player *player);
+
+// for convenience, these functions handle everything
+SDL_bool audio_forwarding_start(struct audio_player *player, const char *serial);
+void audio_forwarding_stop(struct audio_player *player);
+
+#endif
--- a/app/src/command.c
+++ b/app/src/command.c
@@ -6,11 +6,10 @@

 #include "common.h"
 #include "log.h"
-#include "str_util.h"

 static const char *adb_command;

-static inline const char *get_adb_command(void) {
+static inline const char *get_adb_command() {
    if (!adb_command) {
        adb_command = getenv("ADB");
        if (!adb_command)
@@ -19,25 +18,8 @@ static inline const char *get_adb_command(void) {
    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];
+static void fill_cmd(const char *cmd[], const char *serial, const char *const adb_cmd[], int len) {
    int i;
-    process_t process;
    cmd[0] = get_adb_command();
    if (serial) {
        cmd[1] = "-s";
@@ -49,12 +31,19 @@ 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;
-    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_execute(const char *serial, const char *const adb_cmd[], int len) {
+    const char *cmd[len + 4];
+    fill_cmd(cmd, serial, adb_cmd, len);
+    return cmd_execute(cmd[0], cmd);
+}
+
+process_t adb_execute_redirect(const char *serial, const char *const adb_cmd[], int len,
+                               pipe_t *pipe_stdin, pipe_t *pipe_stdout, pipe_t *pipe_stderr) {
+    const char *cmd[len + 4];
+    fill_cmd(cmd, serial, adb_cmd, len);
+    return cmd_execute_redirect(cmd[0], cmd, pipe_stdin, pipe_stdout, pipe_stderr);
 }

 process_t adb_forward(const char *serial, uint16_t local_port, const char *device_socket_name) {
@@ -90,49 +79,8 @@ 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) {
-#ifdef __WINDOWS__
-    // Windows will parse the string, so the paths must be quoted
-    // (see sys/win/command.c)
-    local = strquote(local);
-    if (!local) {
-        return PROCESS_NONE;
-    }
-    remote = strquote(remote);
-    if (!remote) {
-        free((void *) local);
-        return PROCESS_NONE;
-    }
-#endif
-
    const char *const adb_cmd[] = {"push", local, remote};
-    process_t proc = adb_execute(serial, adb_cmd, ARRAY_LEN(adb_cmd));
-
-#ifdef __WINDOWS__
-    free((void *) remote);
-    free((void *) local);
-#endif
-
-    return proc;
-}
-
-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)
-    local = strquote(local);
-    if (!local) {
-        return PROCESS_NONE;
-    }
-#endif
-
-    const char *const adb_cmd[] = {"install", "-r", local};
-    process_t proc = adb_execute(serial, adb_cmd, ARRAY_LEN(adb_cmd));
-
-#ifdef __WINDOWS__
-    free((void *) local);
-#endif
-
-    return proc;
+    return adb_execute(serial, adb_cmd, ARRAY_LEN(adb_cmd));
 }

 process_t adb_remove_path(const char *serial, const char *path) {
@@ -140,6 +88,40 @@ process_t adb_remove_path(const char *serial, const char *path) {
    return adb_execute(serial, adb_cmd, ARRAY_LEN(adb_cmd));
 }

+static int adb_execute_get_output(const char *serial, const char *const adb_cmd[], int adb_cmd_len,
+                           char *data, size_t data_len, const char *name) {
+    pipe_t pipe_stdout;
+    process_t proc = adb_execute_redirect(serial, adb_cmd, adb_cmd_len, NULL, &pipe_stdout, NULL);
+    if (!process_check_success(proc, name)) {
+        return -1;
+    }
+    int r = read_pipe(pipe_stdout, data, data_len);
+    close_pipe(pipe_stdout);
+    return r;
+}
+
+static int truncate_first_line(char *data, int len) {
+    data[len - 1] = '\0';
+    char *eol = strpbrk(data, "\r\n");
+    if (eol) {
+        *eol = '\0';
+        len = eol - data;
+    }
+    return len;
+}
+
+int adb_read_serialno(const char *serial, char *data, size_t len) {
+    const char *const adb_cmd[] = {"get-serialno"};
+    int r = adb_execute_get_output(serial, adb_cmd, ARRAY_LEN(adb_cmd), data, len, "get-serialno");
+    return r <= 0 ? r : truncate_first_line(data, r);
+}
+
+int adb_read_model(const char *serial, char *data, size_t len) {
+    const char *const adb_cmd[] = {"shell", "getprop", "ro.product.model"};
+    int r = adb_execute_get_output(serial, adb_cmd, ARRAY_LEN(adb_cmd), data, len, "getprop model");
+    return r <= 0 ? r : truncate_first_line(data, r);
+}
+
 SDL_bool process_check_success(process_t proc, const char *name) {
    if (proc == PROCESS_NONE) {
        LOGE("Could not execute \"%s\"", name);
--- a/app/src/command.h
+++ b/app/src/command.h
@@ -24,35 +24,42 @@
 # define PROCESS_NONE NULL
  typedef HANDLE process_t;
  typedef DWORD exit_code_t;
+  typedef HANDLE pipe_t;
 #else
 # include <sys/types.h>
 # define PROCESS_NONE -1
  typedef pid_t process_t;
  typedef int exit_code_t;
+  typedef int pipe_t;
 #endif
 # define NO_EXIT_CODE -1

-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);
+process_t cmd_execute(const char *path, const char *const argv[]);
+process_t cmd_execute_redirect(const char *path, const char *const argv[],
+                               pipe_t *pipe_stdin, pipe_t *pipe_stdout, pipe_t *pipe_stderr);
 SDL_bool cmd_terminate(process_t pid);
 SDL_bool cmd_simple_wait(process_t pid, exit_code_t *exit_code);

 process_t adb_execute(const char *serial, const char *const adb_cmd[], int len);
+process_t adb_execute_redirect(const char *serial, const char *const adb_cmd[], int len,
+                               pipe_t *pipe_stdin, pipe_t *pipe_stdout, pipe_t *pipe_stderr);
+
 process_t adb_forward(const char *serial, uint16_t local_port, const char *device_socket_name);
 process_t adb_forward_remove(const char *serial, uint16_t local_port);
 process_t adb_reverse(const char *serial, const char *device_socket_name, uint16_t local_port);
 process_t adb_reverse_remove(const char *serial, const char *device_socket_name);
 process_t adb_push(const char *serial, const char *local, const char *remote);
-process_t adb_install(const char *serial, const char *local);
 process_t adb_remove_path(const char *serial, const char *path);

+// return number of bytes read (-1 on error)
+int adb_read_serialno(const char *serial, char *data, size_t len);
+int adb_read_model(const char *serial, char *data, size_t len);
+
 // convenience function to wait for a successful process execution
 // automatically log process errors with the provided process name
 SDL_bool process_check_success(process_t process, const char *name);

+int read_pipe(pipe_t pipe, char *data, size_t len);
+void close_pipe(pipe_t pipe);
+
 #endif
--- a/app/src/control_event.c
+++ b/app/src/control_event.c
@@ -1,9 +1,8 @@
-#include "control_event.h"
+#include "controlevent.h"

 #include <SDL2/SDL_stdinc.h>
-#include <string.h>

-#include "lock_util.h"
+#include "lockutil.h"
 #include "log.h"

 static inline void write16(Uint8 *buf, Uint16 value) {
--- a/app/src/control_event.h
+++ b/app/src/control_event.h
--- a/app/src/controller.c
+++ b/app/src/controller.c
@@ -1,8 +1,6 @@
 #include "controller.h"

-#include <SDL2/SDL_assert.h>
-#include "config.h"
-#include "lock_util.h"
+#include "lockutil.h"
 #include "log.h"

 SDL_bool controller_init(struct controller *controller, socket_t video_socket) {
@@ -56,28 +54,27 @@ static SDL_bool process_event(struct controller *controller, const struct contro
 static int run_controller(void *data) {
    struct controller *controller = data;

+    mutex_lock(controller->mutex);
    for (;;) {
-        mutex_lock(controller->mutex);
        while (!controller->stopped && control_event_queue_is_empty(&controller->queue)) {
            cond_wait(controller->event_cond, controller->mutex);
        }
        if (controller->stopped) {
            // stop immediately, do not process further events
-            mutex_unlock(controller->mutex);
            break;
        }
        struct control_event event;
-        SDL_bool non_empty = control_event_queue_take(&controller->queue, &event);
-        SDL_assert(non_empty);
-        mutex_unlock(controller->mutex);
-
-        SDL_bool ok = process_event(controller, &event);
-        control_event_destroy(&event);
-        if (!ok) {
-            LOGD("Cannot write event to socket");
-            break;
+        while (control_event_queue_take(&controller->queue, &event)) {
+            SDL_bool ok = process_event(controller, &event);
+            control_event_destroy(&event);
+            if (!ok) {
+                LOGD("Cannot write event to socket");
+                goto end;
+            }
        }
    }
+end:
+    mutex_unlock(controller->mutex);
    return 0;
 }

--- a/app/src/controller.h
+++ b/app/src/controller.h
@@ -1,7 +1,7 @@
 #ifndef CONTROL_H
 #define CONTROL_H

-#include "control_event.h"
+#include "controlevent.h"

 #include <SDL2/SDL_mutex.h>
 #include <SDL2/SDL_stdinc.h>
--- a/app/src/convert.c
+++ b/app/src/convert.c
@@ -70,7 +70,7 @@ static enum android_metastate convert_meta_state(SDL_Keymod mod) {
    return autocomplete_metastate(metastate);
 }

-static SDL_bool convert_keycode(SDL_Keycode from, enum android_keycode *to, Uint16 mod) {
+static SDL_bool convert_keycode(SDL_Keycode from, enum android_keycode *to) {
    switch (from) {
        MAP(SDLK_RETURN,       AKEYCODE_ENTER);
        MAP(SDLK_KP_ENTER,     AKEYCODE_NUMPAD_ENTER);
@@ -86,39 +86,6 @@ static SDL_bool convert_keycode(SDL_Keycode from, enum android_keycode *to, Uint
        MAP(SDLK_LEFT,         AKEYCODE_DPAD_LEFT);
        MAP(SDLK_DOWN,         AKEYCODE_DPAD_DOWN);
        MAP(SDLK_UP,           AKEYCODE_DPAD_UP);
-    }
-    if (mod & (KMOD_LALT | KMOD_RALT | KMOD_LGUI | KMOD_RGUI)) {
-        return SDL_FALSE;
-    }
-    // if ALT and META are not pressed, also handle letters and space
-    switch (from) {
-        MAP(SDLK_a,            AKEYCODE_A);
-        MAP(SDLK_b,            AKEYCODE_B);
-        MAP(SDLK_c,            AKEYCODE_C);
-        MAP(SDLK_d,            AKEYCODE_D);
-        MAP(SDLK_e,            AKEYCODE_E);
-        MAP(SDLK_f,            AKEYCODE_F);
-        MAP(SDLK_g,            AKEYCODE_G);
-        MAP(SDLK_h,            AKEYCODE_H);
-        MAP(SDLK_i,            AKEYCODE_I);
-        MAP(SDLK_j,            AKEYCODE_J);
-        MAP(SDLK_k,            AKEYCODE_K);
-        MAP(SDLK_l,            AKEYCODE_L);
-        MAP(SDLK_m,            AKEYCODE_M);
-        MAP(SDLK_n,            AKEYCODE_N);
-        MAP(SDLK_o,            AKEYCODE_O);
-        MAP(SDLK_p,            AKEYCODE_P);
-        MAP(SDLK_q,            AKEYCODE_Q);
-        MAP(SDLK_r,            AKEYCODE_R);
-        MAP(SDLK_s,            AKEYCODE_S);
-        MAP(SDLK_t,            AKEYCODE_T);
-        MAP(SDLK_u,            AKEYCODE_U);
-        MAP(SDLK_v,            AKEYCODE_V);
-        MAP(SDLK_w,            AKEYCODE_W);
-        MAP(SDLK_x,            AKEYCODE_X);
-        MAP(SDLK_y,            AKEYCODE_Y);
-        MAP(SDLK_z,            AKEYCODE_Z);
-        MAP(SDLK_SPACE,        AKEYCODE_SPACE);
        FAIL;
    }
 }
@@ -159,12 +126,11 @@ SDL_bool input_key_from_sdl_to_android(const SDL_KeyboardEvent *from,
        return SDL_FALSE;
    }

-    Uint16 mod = from->keysym.mod;
-    if (!convert_keycode(from->keysym.sym, &to->keycode_event.keycode, mod)) {
+    if (!convert_keycode(from->keysym.sym, &to->keycode_event.keycode)) {
        return SDL_FALSE;
    }

-    to->keycode_event.metastate = convert_meta_state(mod);
+    to->keycode_event.metastate = convert_meta_state(from->keysym.mod);

    return SDL_TRUE;
 }
--- a/app/src/convert.h
+++ b/app/src/convert.h
@@ -3,7 +3,7 @@

 #include <SDL2/SDL_stdinc.h>
 #include <SDL2/SDL_events.h>
-#include "control_event.h"
+#include "controlevent.h"

 struct complete_mouse_motion_event {
    SDL_MouseMotionEvent *mouse_motion_event;
--- a/app/src/decoder.c
+++ b/app/src/decoder.c
@@ -9,7 +9,7 @@
 #include "config.h"
 #include "events.h"
 #include "frames.h"
-#include "lock_util.h"
+#include "lockutil.h"
 #include "log.h"

 #define BUFSIZE 0x10000
--- a/app/src/device.h
+++ b/app/src/device.h
@@ -7,7 +7,6 @@
 #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);
--- a/app/src/file_handler.c
+++ b/app/src/file_handler.c
@@ -1,231 +0,0 @@
-#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);
-}
--- a/app/src/file_handler.h
+++ b/app/src/file_handler.h
@@ -1,44 +0,0 @@
-#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
--- a/app/src/fps_counter.c
+++ b/app/src/fps_counter.c
@@ -1,4 +1,4 @@
-#include "fps_counter.h"
+#include "fpscounter.h"

 #include <SDL2/SDL_timer.h>

--- a/app/src/fps_counter.h
+++ b/app/src/fps_counter.h
--- a/app/src/frames.c
+++ b/app/src/frames.c
@@ -6,7 +6,7 @@
 #include <libavformat/avformat.h>

 #include "config.h"
-#include "lock_util.h"
+#include "lockutil.h"
 #include "log.h"

 SDL_bool frames_init(struct frames *frames) {
--- a/app/src/frames.h
+++ b/app/src/frames.h
@@ -5,7 +5,7 @@
 #include <SDL2/SDL_stdinc.h>

 #include "config.h"
-#include "fps_counter.h"
+#include "fpscounter.h"

 // forward declarations
 typedef struct AVFrame AVFrame;
--- a/app/src/input_manager.c
+++ b/app/src/input_manager.c
@@ -1,8 +1,7 @@
-#include "input_manager.h"
+#include "inputmanager.h"

-#include <SDL2/SDL_assert.h>
 #include "convert.h"
-#include "lock_util.h"
+#include "lockutil.h"
 #include "log.h"

 // Convert window coordinates (as provided by SDL_GetMouseState() to renderer coordinates (as provided in SDL mouse events)
@@ -30,58 +29,52 @@ static struct point get_mouse_point(struct screen *screen) {
    };
 }

-static const int ACTION_DOWN = 1;
-static const int ACTION_UP = 1 << 1;
-
-static void send_keycode(struct controller *controller, enum android_keycode keycode, int actions, const char *name) {
+static void send_keycode(struct controller *controller, enum android_keycode keycode, 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 (actions & ACTION_DOWN) {
-        control_event.keycode_event.action = AKEY_EVENT_ACTION_DOWN;
-        if (!controller_push_event(controller, &control_event)) {
-            LOGW("Cannot send %s (DOWN)", name);
-            return;
-        }
+    if (!controller_push_event(controller, &control_event)) {
+        LOGW("Cannot send %s (DOWN)", name);
+        return;
    }

-    if (actions & ACTION_UP) {
-        control_event.keycode_event.action = AKEY_EVENT_ACTION_UP;
-        if (!controller_push_event(controller, &control_event)) {
-            LOGW("Cannot send %s (UP)", name);
-        }
+    // send UP event
+    control_event.keycode_event.action = AKEY_EVENT_ACTION_UP;
+    if (!controller_push_event(controller, &control_event)) {
+        LOGW("Cannot send %s (UP)", name);
    }
 }

-static inline void action_home(struct controller *controller, int actions) {
-    send_keycode(controller, AKEYCODE_HOME, actions, "HOME");
+static inline void action_home(struct controller *controller) {
+    send_keycode(controller, AKEYCODE_HOME, "HOME");
 }

-static inline void action_back(struct controller *controller, int actions) {
-    send_keycode(controller, AKEYCODE_BACK, actions, "BACK");
+static inline void action_back(struct controller *controller) {
+    send_keycode(controller, AKEYCODE_BACK, "BACK");
 }

-static inline void action_app_switch(struct controller *controller, int actions) {
-    send_keycode(controller, AKEYCODE_APP_SWITCH, actions, "APP_SWITCH");
+static inline void action_app_switch(struct controller *controller) {
+    send_keycode(controller, AKEYCODE_APP_SWITCH, "APP_SWITCH");
 }

-static inline void action_power(struct controller *controller, int actions) {
-    send_keycode(controller, AKEYCODE_POWER, actions, "POWER");
+static inline void action_power(struct controller *controller) {
+    send_keycode(controller, AKEYCODE_POWER, "POWER");
 }

-static inline void action_volume_up(struct controller *controller, int actions) {
-    send_keycode(controller, AKEYCODE_VOLUME_UP, actions, "VOLUME_UP");
+static inline void action_volume_up(struct controller *controller) {
+    send_keycode(controller, AKEYCODE_VOLUME_UP, "VOLUME_UP");
 }

-static inline void action_volume_down(struct controller *controller, int actions) {
-    send_keycode(controller, AKEYCODE_VOLUME_DOWN, actions, "VOLUME_DOWN");
+static inline void action_volume_down(struct controller *controller) {
+    send_keycode(controller, AKEYCODE_VOLUME_DOWN, "VOLUME_DOWN");
 }

-static inline void action_menu(struct controller *controller, int actions) {
-    send_keycode(controller, AKEYCODE_MENU, actions, "MENU");
+static inline void action_menu(struct controller *controller) {
+    send_keycode(controller, AKEYCODE_MENU, "MENU");
 }

 // turn the screen on if it was off, press BACK otherwise
@@ -130,12 +123,6 @@ static void clipboard_paste(struct controller *controller) {

 void input_manager_process_text_input(struct input_manager *input_manager,
                                      const SDL_TextInputEvent *event) {
-    char c = event->text[0];
-    if (isalpha(c) || c == ' ') {
-        SDL_assert(event->text[1] == '\0');
-        // letters and space are handled as raw key event
-        return;
-    }
    struct control_event control_event;
    control_event.type = CONTROL_EVENT_TYPE_TEXT;
    control_event.text_event.text = SDL_strdup(event->text);
@@ -151,97 +138,60 @@ void input_manager_process_text_input(struct input_manager *input_manager,
 void input_manager_process_key(struct input_manager *input_manager,
                               const SDL_KeyboardEvent *event) {
    SDL_bool ctrl = event->keysym.mod & (KMOD_LCTRL | KMOD_RCTRL);
-    SDL_bool alt = event->keysym.mod & (KMOD_LALT | KMOD_RALT);
-    SDL_bool meta = event->keysym.mod & (KMOD_LGUI | KMOD_RGUI);
-
-    if (alt) {
-        // no shortcut involves Alt or Meta, and they should not be forwarded
-        // to the device
-        return;
-    }

    // capture all Ctrl events
-    if (ctrl | meta) {
+    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 involving SHIFT
+            // currently, there is no shortcut implying 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:
-                if (ctrl && !meta && !repeat) {
-                    action_home(input_manager->controller, action);
-                }
+                action_home(input_manager->controller);
                return;
            case SDLK_b: // fall-through
            case SDLK_BACKSPACE:
-                if (ctrl && !meta && !repeat) {
-                    action_back(input_manager->controller, action);
-                }
+                action_back(input_manager->controller);
                return;
            case SDLK_s:
-                if (ctrl && !meta && !repeat) {
-                    action_app_switch(input_manager->controller, action);
-                }
+                action_app_switch(input_manager->controller);
                return;
            case SDLK_m:
-                if (ctrl && !meta && !repeat) {
-                    action_menu(input_manager->controller, action);
-                }
+                action_menu(input_manager->controller);
                return;
            case SDLK_p:
-                if (ctrl && !meta && !repeat) {
-                    action_power(input_manager->controller, action);
-                }
+                action_power(input_manager->controller);
                return;
            case SDLK_DOWN:
-#ifdef __APPLE__
-                if (!ctrl && meta) {
-#else
-                if (ctrl && !meta) {
-#endif
-                    // forward repeated events
-                    action_volume_down(input_manager->controller, action);
-                }
+                action_volume_down(input_manager->controller);
                return;
            case SDLK_UP:
-#ifdef __APPLE__
-                if (!ctrl && meta) {
-#else
-                if (ctrl && !meta) {
-#endif
-                    // forward repeated events
-                    action_volume_up(input_manager->controller, action);
-                }
+                action_volume_up(input_manager->controller);
                return;
            case SDLK_v:
-                if (ctrl && !meta && !repeat && event->type == SDL_KEYDOWN) {
-                    clipboard_paste(input_manager->controller);
-                }
+                clipboard_paste(input_manager->controller);
                return;
            case SDLK_f:
-                if (ctrl && !meta && !repeat && event->type == SDL_KEYDOWN) {
-                    screen_switch_fullscreen(input_manager->screen);
-                }
+                screen_switch_fullscreen(input_manager->screen);
                return;
            case SDLK_x:
-                if (ctrl && !meta && !repeat && event->type == SDL_KEYDOWN) {
-                    screen_resize_to_fit(input_manager->screen);
-                }
+                screen_resize_to_fit(input_manager->screen);
                return;
            case SDLK_g:
-                if (ctrl && !meta && !repeat && event->type == SDL_KEYDOWN) {
-                    screen_resize_to_pixel_perfect(input_manager->screen);
-                }
+                screen_resize_to_pixel_perfect(input_manager->screen);
                return;
            case SDLK_i:
-                if (ctrl && !meta && !repeat && event->type == SDL_KEYDOWN) {
-                    switch_fps_counter_state(input_manager->frames);
-                }
+                switch_fps_counter_state(input_manager->frames);
                return;
        }

@@ -278,7 +228,7 @@ void input_manager_process_mouse_button(struct input_manager *input_manager,
            return;
        }
        if (event->button == SDL_BUTTON_MIDDLE) {
-            action_home(input_manager->controller, ACTION_DOWN | ACTION_UP);
+            action_home(input_manager->controller);
            return;
        }
        // double-click on black borders resize to fit the device screen
@@ -292,7 +242,7 @@ 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)) {
--- a/app/src/input_manager.h
+++ b/app/src/input_manager.h
@@ -3,7 +3,7 @@

 #include "common.h"
 #include "controller.h"
-#include "fps_counter.h"
+#include "fpscounter.h"
 #include "frames.h"
 #include "screen.h"

--- a/app/src/lock_util.c
+++ b/app/src/lock_util.c
@@ -1,4 +1,3 @@
-#include <lock_util.h>
 #include <stdlib.h>
 #include <SDL2/SDL_mutex.h>

--- a/app/src/lock_util.h
+++ b/app/src/lock_util.h
--- a/app/src/main.c
+++ b/app/src/main.c
@@ -10,11 +10,12 @@

 struct args {
    const char *serial;
-    const char *crop;
-    SDL_bool fullscreen;
    SDL_bool help;
    SDL_bool version;
    SDL_bool show_touches;
+#ifdef AUDIO_SUPPORT
+    SDL_bool forward_audio;
+#endif
    Uint16 port;
    Uint16 max_size;
    Uint32 bit_rate;
@@ -25,21 +26,18 @@ static void usage(const char *arg0) {
        "Usage: %s [options]\n"
        "\n"
        "Options:\n"
+#ifdef AUDIO_SUPPORT
+        "\n"
+        "    -a, --forward-audio\n"
+        "        Forward audio from the device to the computer over USB\n"
+        "        (experimental).\n"
+#endif
        "\n"
        "    -b, --bit-rate value\n"
        "        Encode the video at the given bit-rate, expressed in bits/s.\n"
        "        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"
@@ -109,9 +107,6 @@ 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,
@@ -202,31 +197,36 @@ 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'},
-        {"serial",       required_argument, NULL, 's'},
-        {"show-touches", no_argument,       NULL, 't'},
-        {"version",      no_argument,       NULL, 'v'},
-        {NULL,           0,                 NULL, 0  },
+#ifdef AUDIO_SUPPORT
+        {"forward-audio", no_argument,       NULL, 'a'},
+#endif
+        {"bit-rate",      required_argument, NULL, 'b'},
+        {"help",          no_argument,       NULL, 'h'},
+        {"max-size",      required_argument, NULL, 'm'},
+        {"port",          required_argument, NULL, 'p'},
+        {"serial",        required_argument, NULL, 's'},
+        {"show-touches",  no_argument,       NULL, 't'},
+        {"version",       no_argument,       NULL, 'v'},
+        {NULL,            0,                 NULL, 0  },
    };
    int c;
-    while ((c = getopt_long(argc, argv, "b:c:fhm:p:s:tv", long_options, NULL)) != -1) {
+#ifdef AUDIO_SUPPORT
+# define AUDIO_SHORT_PARAM "a"
+#else
+# define AUDIO_SHORT_PARAM
+#endif
+    while ((c = getopt_long(argc, argv, AUDIO_SHORT_PARAM "b:hm:p:s:tv", long_options, NULL)) != -1) {
        switch (c) {
+#ifdef AUDIO_SUPPORT
+            case 'a':
+                args->forward_audio = SDL_TRUE;
+                break;
+#endif
            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;
@@ -272,13 +272,15 @@ int main(int argc, char *argv[]) {
 #endif
    struct args args = {
        .serial = NULL,
-        .crop = NULL,
        .help = SDL_FALSE,
        .version = SDL_FALSE,
        .show_touches = SDL_FALSE,
        .port = DEFAULT_LOCAL_PORT,
        .max_size = DEFAULT_MAX_SIZE,
        .bit_rate = DEFAULT_BIT_RATE,
+#ifdef AUDIO_SUPPORT
+        .forward_audio = SDL_FALSE,
+#endif
    };
    if (!parse_args(&args, argc, argv)) {
        return 1;
@@ -294,9 +296,7 @@ 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;
@@ -308,22 +308,19 @@ 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,
+#ifdef AUDIO_SUPPORT
+        .forward_audio = args.forward_audio,
+#endif
    };
    int res = scrcpy(&options) ? 0 : 1;

    avformat_network_deinit(); // ignore failure

-#if defined (__WINDOWS__) && ! defined (WINDOWS_NOCONSOLE)
-    if (res != 0) {
-        fprintf(stderr, "Press any key to continue...\n");
-        getchar();
-    }
-#endif
+    SDL_Quit();
+
    return res;
 }
--- a/app/src/net.c
+++ b/app/src/net.c
@@ -87,7 +87,7 @@ ssize_t net_send(socket_t socket, const void *buf, size_t len) {
 }

 ssize_t net_send_all(socket_t socket, const void *buf, size_t len) {
-    ssize_t w = 0;
+    ssize_t w;
    while (len > 0) {
        w = send(socket, buf, len, 0);
        if (w == -1) {
--- a/app/src/scrcpy.c
+++ b/app/src/scrcpy.c
@@ -7,29 +7,33 @@
 #include <sys/time.h>
 #include <SDL2/SDL.h>

+#include "aoa.h"
+#include "audio.h"
 #include "command.h"
 #include "common.h"
 #include "controller.h"
 #include "decoder.h"
 #include "device.h"
 #include "events.h"
-#include "file_handler.h"
 #include "frames.h"
-#include "fps_counter.h"
-#include "input_manager.h"
+#include "fpscounter.h"
+#include "inputmanager.h"
 #include "log.h"
-#include "lock_util.h"
+#include "lockutil.h"
 #include "net.h"
 #include "screen.h"
 #include "server.h"
-#include "tiny_xpm.h"
+#include "tinyxpm.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;
+
+#ifdef AUDIO_SUPPORT
+static struct audio_player audio_player;
+#endif

 static struct input_manager input_manager = {
    .controller = &controller,
@@ -56,12 +60,7 @@ static int event_watcher(void *data, SDL_Event *event) {
 }
 #endif

-static SDL_bool is_apk(const char *file) {
-    const char *ext = strrchr(file, '.');
-    return ext && !strcmp(ext, ".apk");
-}
-
-static SDL_bool event_loop(void) {
+static void event_loop(void) {
 #ifdef CONTINUOUS_RESIZING_WORKAROUND
    SDL_AddEventWatch(event_watcher, NULL);
 #endif
@@ -70,10 +69,10 @@ static SDL_bool event_loop(void) {
        switch (event.type) {
            case EVENT_DECODER_STOPPED:
                LOGD("Video decoder stopped");
-                return SDL_FALSE;
+                return;
            case SDL_QUIT:
                LOGD("User requested to quit");
-                return SDL_TRUE;
+                return;
            case EVENT_NEW_FRAME:
                if (!screen.has_frame) {
                    screen.has_frame = SDL_TRUE;
@@ -81,7 +80,7 @@ static SDL_bool event_loop(void) {
                    screen_show_window(&screen);
                }
                if (!screen_update_frame(&screen, &frames)) {
-                    return SDL_FALSE;
+                    return;
                }
                break;
            case SDL_WINDOWEVENT:
@@ -109,19 +108,8 @@ static SDL_bool 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) {
@@ -138,12 +126,11 @@ 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->crop)) {
-        return SDL_FALSE;
+    if (!SDL_SetHint(SDL_HINT_NO_SIGNAL_HANDLERS, "1")) {
+        LOGW("Cannot request to keep default signal handlers");
    }

-    process_t proc_show_touches = PROCESS_NONE;
+    process_t proc_show_touches;
    SDL_bool show_touches_waited;
    if (options->show_touches) {
        LOGI("Enable show_touches");
@@ -151,13 +138,23 @@ SDL_bool scrcpy(const struct scrcpy_options *options) {
        show_touches_waited = SDL_FALSE;
    }

+#ifdef AUDIO_SUPPORT
+    if (options->forward_audio) {
+        if (!audio_forwarding_start(&audio_player, options->serial)) {
+            return SDL_FALSE;
+        }
+    }
+#endif
+
    SDL_bool ret = SDL_TRUE;

-    if (!SDL_SetHint(SDL_HINT_NO_SIGNAL_HANDLERS, "1")) {
-        LOGW("Cannot request to keep default signal handlers");
+    if (!server_start(&server, options->serial, options->port,
+                      options->max_size, options->bit_rate)) {
+        ret = SDL_FALSE;
+        goto finally_disable_audio_forwarding;
    }

-    if (!sdl_init_and_configure()) {
+    if (!sdl_video_init()) {
        ret = SDL_FALSE;
        goto finally_destroy_server;
    }
@@ -187,12 +184,6 @@ 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
@@ -200,7 +191,7 @@ SDL_bool scrcpy(const struct scrcpy_options *options) {
    if (!decoder_start(&decoder)) {
        ret = SDL_FALSE;
        server_stop(&server);
-        goto finally_destroy_file_handler;
+        goto finally_destroy_frames;
    }

    if (!controller_init(&controller, device_socket)) {
@@ -223,11 +214,7 @@ SDL_bool scrcpy(const struct scrcpy_options *options) {
        show_touches_waited = SDL_TRUE;
    }

-    if (options->fullscreen) {
-        screen_switch_fullscreen(&screen);
-    }
-
-    ret = event_loop();
+    event_loop();
    LOGD("quit...");

    screen_destroy(&screen);
@@ -242,10 +229,6 @@ 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:
@@ -260,6 +243,12 @@ finally_destroy_server:
    }

    server_destroy(&server);
+finally_disable_audio_forwarding:
+#ifdef AUDIO_SUPPORT
+    if (options->forward_audio) {
+        audio_forwarding_stop(&audio_player);
+    }
+#endif

    return ret;
 }
--- a/app/src/scrcpy.h
+++ b/app/src/scrcpy.h
@@ -2,15 +2,17 @@
 #define SCRCPY_H

 #include <SDL2/SDL_stdinc.h>
+#include "config.h"

 struct scrcpy_options {
    const char *serial;
-    const char *crop;
    Uint16 port;
    Uint16 max_size;
    Uint32 bit_rate;
    SDL_bool show_touches;
-    SDL_bool fullscreen;
+#ifdef AUDIO_SUPPORT
+    SDL_bool forward_audio;
+#endif
 };

 SDL_bool scrcpy(const struct scrcpy_options *options);
--- a/app/src/screen.c
+++ b/app/src/screen.c
@@ -4,20 +4,18 @@
 #include <string.h>

 #include "icon.xpm"
-#include "lock_util.h"
+#include "lockutil.h"
 #include "log.h"
-#include "tiny_xpm.h"
+#include "tinyxpm.h"

 #define DISPLAY_MARGINS 96

-SDL_bool sdl_init_and_configure(void) {
-    if (SDL_Init(SDL_INIT_VIDEO)) {
-        LOGC("Could not initialize SDL: %s", SDL_GetError());
+SDL_bool sdl_video_init(void) {
+    if (SDL_InitSubSystem(SDL_INIT_VIDEO)) {
+        LOGC("Could not initialize SDL video: %s", SDL_GetError());
        return SDL_FALSE;
    }

-    atexit(SDL_Quit);
-
    // Use the best available scale quality
    if (!SDL_SetHint(SDL_HINT_RENDER_SCALE_QUALITY, "2")) {
        LOGW("Could not enable bilinear filtering");
--- a/app/src/screen.h
+++ b/app/src/screen.h
@@ -35,7 +35,7 @@ struct screen {
 }

 // init SDL and set appropriate hints
-SDL_bool sdl_init_and_configure(void);
+SDL_bool sdl_video_init(void);

 // initialize default values
 void screen_init(struct screen *screen);
--- a/app/src/server.c
+++ b/app/src/server.c
@@ -3,7 +3,6 @@
 #include <errno.h>
 #include <inttypes.h>
 #include <stdint.h>
-#include <stdio.h>
 #include <SDL2/SDL_assert.h>
 #include <SDL2/SDL_timer.h>

@@ -77,8 +76,7 @@ static SDL_bool disable_tunnel(struct server *server) {
 }

 static process_t execute_server(const char *serial,
-                                Uint16 max_size, Uint32 bit_rate,
-                                const char *crop, SDL_bool tunnel_forward) {
+                                Uint16 max_size, Uint32 bit_rate, SDL_bool tunnel_forward) {
    char max_size_string[6];
    char bit_rate_string[11];
    sprintf(max_size_string, "%"PRIu16, max_size);
@@ -92,7 +90,6 @@ 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]));
 }
@@ -149,25 +146,20 @@ 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, const char *crop) {
+                      Uint16 max_size, Uint32 bit_rate) {
    server->local_port = local_port;

    if (serial) {
        server->serial = SDL_strdup(serial);
-        if (!server->serial) {
-            return SDL_FALSE;
-        }
    }

    if (!push_server(serial)) {
-        SDL_free((void *) server->serial);
        return SDL_FALSE;
    }

    server->server_copied_to_device = SDL_TRUE;

    if (!enable_tunnel(server)) {
-        SDL_free((void *) server->serial);
        return SDL_FALSE;
    }

@@ -184,20 +176,17 @@ SDL_bool server_start(struct server *server, const char *serial, Uint16 local_po
        if (server->server_socket == INVALID_SOCKET) {
            LOGE("Could not listen on port %" PRIu16, local_port);
            disable_tunnel(server);
-            SDL_free((void *) server->serial);
            return SDL_FALSE;
        }
    }

    // server will connect to our server socket
-    server->process = execute_server(serial, max_size, bit_rate, crop,
-                                     server->tunnel_forward);
+    server->process = execute_server(serial, max_size, bit_rate, server->tunnel_forward);
    if (server->process == PROCESS_NONE) {
        if (!server->tunnel_forward) {
            close_socket(&server->server_socket);
        }
        disable_tunnel(server);
-        SDL_free((void *) server->serial);
        return SDL_FALSE;
    }

@@ -210,7 +199,7 @@ socket_t server_connect_to(struct server *server) {
    if (!server->tunnel_forward) {
        server->device_socket = net_accept(server->server_socket);
    } else {
-        Uint32 attempts = 100;
+        Uint32 attempts = 50;
        Uint32 delay = 100; // ms
        server->device_socket = connect_to_server(server->local_port, attempts, delay);
    }
--- a/app/src/server.h
+++ b/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, const char *crop);
+                      Uint16 max_size, Uint32 bit_rate);

 // block until the communication with the server is established
 socket_t server_connect_to(struct server *server);
--- a/app/src/str_util.c
+++ b/app/src/str_util.c
@@ -1,7 +1,4 @@
-#include "str_util.h"
-
-#include <stdlib.h>
-#include <string.h>
+#include "strutil.h"

 size_t xstrncpy(char *dest, const char *src, size_t n) {
    size_t i;
@@ -34,16 +31,3 @@ truncated:
    dst[n - 1] = '\0';
    return n;
 }
-
-char *strquote(const char *src) {
-    size_t len = strlen(src);
-    char *quoted = malloc(len + 3);
-    if (!quoted) {
-        return NULL;
-    }
-    memcpy(&quoted[1], src, len);
-    quoted[0] = '"';
-    quoted[len + 1] = '"';
-    quoted[len + 2] = '\0';
-    return quoted;
-}
--- a/app/src/str_util.h
+++ b/app/src/str_util.h
@@ -16,8 +16,4 @@ size_t xstrncpy(char *dest, const char *src, size_t n);
 // occurred, or n if truncated
 size_t xstrjoin(char *dst, const char *const tokens[], char sep, size_t n);

-// quote a string
-// returns the new allocated string, to be freed by the caller
-char *strquote(const char *src);
-
 #endif
--- a/app/src/sys/unix/command.c
+++ b/app/src/sys/unix/command.c
@@ -1,80 +1,112 @@
 #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"

-enum process_result cmd_execute(const char *path, const char *const argv[], pid_t *pid) {
-    int fd[2];
-
-    if (pipe(fd) == -1) {
-        perror("pipe");
-        return PROCESS_ERROR_GENERIC;
-    }
-
-    enum process_result ret = PROCESS_SUCCESS;
-
-    *pid = fork();
-    if (*pid == -1) {
+pid_t cmd_execute(const char *path, const char *const argv[]) {
+    pid_t pid = fork();
+    if (pid == -1) {
        perror("fork");
-        ret = PROCESS_ERROR_GENERIC;
-        goto end;
+        return -1;
+    }
+    if (pid == 0) {
+        execvp(path, (char *const *)argv);
+        perror("exec");
+        _exit(1);
+    }
+    return pid;
+}
+
+pid_t cmd_execute_redirect(const char *path, const char *const argv[],
+                           int *pipe_stdin, int *pipe_stdout, int *pipe_stderr) {
+    int in[2];
+    int out[2];
+    int err[2];
+    if (pipe_stdin) {
+        if (pipe(in) == -1) {
+            perror("pipe");
+            return -1;
+        }
+    }
+    if (pipe_stdout) {
+        if (pipe(out) == -1) {
+            perror("pipe");
+            // clean up
+            if (pipe_stdin) {
+                close(in[0]);
+                close(in[1]);
+            }
+            return -1;
+        }
+    }
+    if (pipe_stderr) {
+        if (pipe(err) == -1) {
+            perror("pipe");
+            // clean up
+            if (pipe_stdout) {
+                close(out[0]);
+                close(out[1]);
+            }
+            if (pipe_stdin) {
+                close(in[0]);
+                close(in[1]);
+            }
+            return -1;
+        }
    }

-    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;
+    pid_t pid = fork();
+    if (pid == -1) {
+        perror("fork");
+        return -1;
+    }
+
+    if (pid == 0) {
+        if (pipe_stdin) {
+            if (in[0] != STDIN_FILENO) {
+                dup2(in[0], STDIN_FILENO);
+                close(in[0]);
            }
-            perror("exec");
-        } else {
-            perror("fcntl");
-            ret = PROCESS_ERROR_GENERIC;
+            close(in[1]);
        }
-        // send ret to the parent
-        if (write(fd[1], &ret, sizeof(ret)) == -1) {
-            perror("write");
+        if (pipe_stdout) {
+            if (out[1] != STDOUT_FILENO) {
+                dup2(out[1], STDOUT_FILENO);
+                close(out[1]);
+            }
+            close(out[0]);
        }
-        // close write side before exiting
-        close(fd[1]);
+        if (pipe_stderr) {
+            if (err[1] != STDERR_FILENO) {
+                dup2(err[1], STDERR_FILENO);
+                close(err[1]);
+            }
+            close(err[0]);
+        }
+        execvp(path, (char *const *)argv);
+        perror("exec");
        _exit(1);
    }

-end:
-    if (fd[0] != -1) {
-        close(fd[0]);
+    if (pipe_stdin) {
+        close(in[0]);
+        *pipe_stdin = in[1];
    }
-    if (fd[1] != -1) {
-        close(fd[1]);
+    if (pipe_stdout) {
+        *pipe_stdout = out[0];
+        close(out[1]);
    }
-    return ret;
+    if (pipe_stderr) {
+        *pipe_stderr = err[0];
+        close(err[1]);
+    }
+
+    return pid;
 }

 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;
 }

@@ -92,3 +124,13 @@ SDL_bool cmd_simple_wait(pid_t pid, int *exit_code) {
    }
    return !code;
 }
+
+int read_pipe(int pipe, char *data, size_t len) {
+    return read(pipe, data, len);
+}
+
+void close_pipe(int pipe) {
+    if (close(pipe)) {
+        perror("close pipe");
+    }
+}
--- a/app/src/sys/win/command.c
+++ b/app/src/sys/win/command.c
@@ -1,8 +1,7 @@
 #include "command.h"

-#include "config.h"
 #include "log.h"
-#include "str_util.h"
+#include "strutil.h"

 static int build_cmd(char *cmd, size_t len, const char *const argv[]) {
    // Windows command-line parsing is WTF:
@@ -17,7 +16,7 @@ static int build_cmd(char *cmd, size_t len, const char *const argv[]) {
    return 0;
 }

-enum process_result cmd_execute(const char *path, const char *const argv[], HANDLE *handle) {
+HANDLE cmd_execute(const char *path, const char *const argv[]) {
    STARTUPINFO si;
    PROCESS_INFORMATION pi;
    memset(&si, 0, sizeof(si));
@@ -25,25 +24,83 @@ enum process_result cmd_execute(const char *path, const char *const argv[], HAND

    char cmd[256];
    if (build_cmd(cmd, sizeof(cmd), argv)) {
-        *handle = NULL;
-        return PROCESS_ERROR_GENERIC;
+        return NULL;
    }

-#ifdef WINDOWS_NOCONSOLE
-    int flags = CREATE_NO_WINDOW;
-#else
-    int flags = 0;
-#endif
-    if (!CreateProcess(NULL, cmd, NULL, NULL, FALSE, flags, NULL, NULL, &si, &pi)) {
-        *handle = NULL;
-        if (GetLastError() == ERROR_FILE_NOT_FOUND) {
-            return PROCESS_ERROR_MISSING_BINARY;
+    if (!CreateProcess(NULL, cmd, NULL, NULL, FALSE, CREATE_NO_WINDOW, NULL, NULL, &si, &pi)) {
+        return NULL;
+    }
+
+    return pi.hProcess;
+}
+
+HANDLE cmd_execute_redirect(const char *path, const char *const argv[],
+                            HANDLE *pipe_stdin, HANDLE *pipe_stdout, HANDLE *pipe_stderr) {
+    SECURITY_ATTRIBUTES sa;
+    sa.nLength = sizeof(SECURITY_ATTRIBUTES);
+    sa.lpSecurityDescriptor = NULL;
+    sa.bInheritHandle = TRUE;
+
+    HANDLE stdin_read_handle;
+    HANDLE stdout_write_handle;
+    HANDLE stderr_write_handle;
+    if (pipe_stdin) {
+        if (!CreatePipe(&stdin_read_handle, pipe_stdin, &sa, 0)) {
+             perror("pipe");
+             return NULL;
+        }
+    }
+    if (pipe_stdout) {
+        if (!CreatePipe(pipe_stdout, &stdout_write_handle, &sa, 0)) {
+             perror("pipe");
+             // clean up
+             if (pipe_stdin) {
+                CloseHandle(&stdin_read_handle);
+                CloseHandle(pipe_stdin);
+             }
+             return NULL;
+        }
+    }
+    if (pipe_stderr) {
+        if (!CreatePipe(pipe_stderr, &stderr_write_handle, &sa, 0)) {
+            perror("pipe");
+            // clean up
+             if (pipe_stdin) {
+                CloseHandle(&stdin_read_handle);
+                CloseHandle(pipe_stdin);
+             }
+            if (pipe_stdout) {
+                CloseHandle(pipe_stdout);
+                CloseHandle(&stdout_write_handle);
+            }
        }
-        return PROCESS_ERROR_GENERIC;
    }

-    *handle = pi.hProcess;
-    return PROCESS_SUCCESS;
+    STARTUPINFO si;
+    PROCESS_INFORMATION pi;
+    memset(&si, 0, sizeof(si));
+    si.cb = sizeof(si);
+    si.dwFlags = STARTF_USESTDHANDLES;
+    if (pipe_stdin) {
+        si.hStdInput = stdin_read_handle;
+    }
+    if (pipe_stdout) {
+        si.hStdOutput = stdout_write_handle;
+    }
+    if (pipe_stderr) {
+        si.hStdError = stderr_write_handle;
+    }
+
+    char cmd[256];
+    if (build_cmd(cmd, sizeof(cmd), argv)) {
+        return NULL;
+    }
+
+    if (!CreateProcess(NULL, cmd, NULL, NULL, TRUE, CREATE_NO_WINDOW, NULL, NULL, &si, &pi)) {
+        return NULL;
+    }
+
+    return pi.hProcess;
 }

 SDL_bool cmd_terminate(HANDLE handle) {
@@ -61,3 +118,17 @@ SDL_bool cmd_simple_wait(HANDLE handle, DWORD *exit_code) {
    }
    return !code;
 }
+
+int read_pipe(HANDLE pipe, char *data, size_t len) {
+    DWORD r;
+    if (!ReadFile(pipe, data, len, &r, NULL)) {
+        return -1;
+    }
+    return r;
+}
+
+void close_pipe(HANDLE pipe) {
+    if (!CloseHandle(pipe)) {
+        LOGW("Cannot close pipe");
+    }
+}
--- a/app/src/tiny_xpm.c
+++ b/app/src/tiny_xpm.c
@@ -1,4 +1,4 @@
-#include "tiny_xpm.h"
+#include "tinyxpm.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
-    int width = strtol(xpm[0], &endptr, 10);
-    int height = strtol(endptr + 1, &endptr, 10);
-    int colors = strtol(endptr + 1, &endptr, 10);
-    int chars = strtol(endptr + 1, &endptr, 10);
+    Uint32 width = strtol(xpm[0], &endptr, 10);
+    Uint32 height = strtol(endptr + 1, &endptr, 10);
+    Uint32 colors = strtol(endptr + 1, &endptr, 10);
+    Uint32 chars = strtol(endptr + 1, &endptr, 10);

    // sanity checks
-    SDL_assert(0 <= width && width < 256);
-    SDL_assert(0 <= height && height < 256);
-    SDL_assert(0 <= colors && colors < 256);
+    SDL_assert(width < 256);
+    SDL_assert(height < 256);
+    SDL_assert(colors < 256);
    SDL_assert(chars == 1); // this implementation does not support more

    // init index
--- a/app/src/tiny_xpm.h
+++ b/app/src/tiny_xpm.h
--- a/app/tests/test_control_event_queue.c
+++ b/app/tests/test_control_event_queue.c
@@ -1,9 +1,8 @@
 #include <assert.h>
-#include <string.h>

-#include "control_event.h"
+#include "controlevent.h"

-static void test_control_event_queue_empty(void) {
+static void test_control_event_queue_empty() {
    struct control_event_queue queue;
    SDL_bool init_ok = control_event_queue_init(&queue);
    assert(init_ok);
@@ -25,7 +24,7 @@ static void test_control_event_queue_empty(void) {
    control_event_queue_destroy(&queue);
 }

-static void test_control_event_queue_full(void) {
+static void test_control_event_queue_full() {
    struct control_event_queue queue;
    SDL_bool init_ok = control_event_queue_init(&queue);
    assert(init_ok);
@@ -43,7 +42,7 @@ static void test_control_event_queue_full(void) {
    control_event_queue_destroy(&queue);
 }

-static void test_control_event_queue_push_take(void) {
+static void test_control_event_queue_push_take() {
    struct control_event_queue queue;
    SDL_bool init_ok = control_event_queue_init(&queue);
    assert(init_ok);
@@ -87,7 +86,7 @@ static void test_control_event_queue_push_take(void) {
    control_event_queue_destroy(&queue);
 }

-int main(void) {
+int main() {
    test_control_event_queue_empty();
    test_control_event_queue_full();
    test_control_event_queue_push_take();
--- a/app/tests/test_control_event_serialize.c
+++ b/app/tests/test_control_event_serialize.c
@@ -1,9 +1,8 @@
 #include <assert.h>
-#include <string.h>

-#include "control_event.h"
+#include "controlevent.h"

-static void test_serialize_keycode_event(void) {
+static void test_serialize_keycode_event() {
    struct control_event event = {
        .type = CONTROL_EVENT_TYPE_KEYCODE,
        .keycode_event = {
@@ -26,7 +25,7 @@ static void test_serialize_keycode_event(void) {
    assert(!memcmp(buf, expected, sizeof(expected)));
 }

-static void test_serialize_text_event(void) {
+static void test_serialize_text_event() {
    struct control_event event = {
        .type = CONTROL_EVENT_TYPE_TEXT,
        .text_event = {
@@ -46,7 +45,7 @@ static void test_serialize_text_event(void) {
    assert(!memcmp(buf, expected, sizeof(expected)));
 }

-static void test_serialize_long_text_event(void) {
+static void test_serialize_long_text_event() {
    struct control_event event;
    event.type = CONTROL_EVENT_TYPE_TEXT;
    char text[TEXT_MAX_LENGTH];
@@ -66,7 +65,7 @@ static void test_serialize_long_text_event(void) {
    assert(!memcmp(buf, expected, sizeof(expected)));
 }

-static void test_serialize_mouse_event(void) {
+static void test_serialize_mouse_event() {
    struct control_event event = {
        .type = CONTROL_EVENT_TYPE_MOUSE,
        .mouse_event = {
@@ -99,7 +98,7 @@ static void test_serialize_mouse_event(void) {
    assert(!memcmp(buf, expected, sizeof(expected)));
 }

-static void test_serialize_scroll_event(void) {
+static void test_serialize_scroll_event() {
    struct control_event event = {
        .type = CONTROL_EVENT_TYPE_SCROLL,
        .scroll_event = {
@@ -132,10 +131,11 @@ static void test_serialize_scroll_event(void) {
    assert(!memcmp(buf, expected, sizeof(expected)));
 }

-int main(void) {
+int main() {
    test_serialize_keycode_event();
    test_serialize_text_event();
    test_serialize_long_text_event();
    test_serialize_mouse_event();
    test_serialize_scroll_event();
+    return 0;
 }
--- a/app/tests/test_strutil.c
+++ b/app/tests/test_strutil.c
@@ -1,9 +1,9 @@
 #include <assert.h>
 #include <string.h>

-#include "str_util.h"
+#include "strutil.h"

-static void test_xstrncpy_simple(void) {
+static void test_xstrncpy_simple() {
    char s[] = "xxxxxxxxxx";
    size_t w = xstrncpy(s, "abcdef", sizeof(s));

@@ -20,7 +20,7 @@ static void test_xstrncpy_simple(void) {
    assert(!strcmp("abcdef", s));
 }

-static void test_xstrncpy_just_fit(void) {
+static void test_xstrncpy_just_fit() {
    char s[] = "xxxxxx";
    size_t w = xstrncpy(s, "abcdef", sizeof(s));

@@ -34,7 +34,7 @@ static void test_xstrncpy_just_fit(void) {
    assert(!strcmp("abcdef", s));
 }

-static void test_xstrncpy_truncated(void) {
+static void test_xstrncpy_truncated() {
    char s[] = "xxx";
    size_t w = xstrncpy(s, "abcdef", sizeof(s));

@@ -48,7 +48,7 @@ static void test_xstrncpy_truncated(void) {
    assert(!strncmp("abcdef", s, 3));
 }

-static void test_xstrjoin_simple(void) {
+static void test_xstrjoin_simple() {
    const char *const tokens[] = { "abc", "de", "fghi", NULL };
    char s[] = "xxxxxxxxxxxxxx";
    size_t w = xstrjoin(s, tokens, ' ', sizeof(s));
@@ -66,7 +66,7 @@ static void test_xstrjoin_simple(void) {
    assert(!strcmp("abc de fghi", s));
 }

-static void test_xstrjoin_just_fit(void) {
+static void test_xstrjoin_just_fit() {
    const char *const tokens[] = { "abc", "de", "fghi", NULL };
    char s[] = "xxxxxxxxxxx";
    size_t w = xstrjoin(s, tokens, ' ', sizeof(s));
@@ -81,7 +81,7 @@ static void test_xstrjoin_just_fit(void) {
    assert(!strcmp("abc de fghi", s));
 }

-static void test_xstrjoin_truncated_in_token(void) {
+static void test_xstrjoin_truncated_in_token() {
    const char *const tokens[] = { "abc", "de", "fghi", NULL };
    char s[] = "xxxxx";
    size_t w = xstrjoin(s, tokens, ' ', sizeof(s));
@@ -96,7 +96,7 @@ static void test_xstrjoin_truncated_in_token(void) {
    assert(!strcmp("abc d", s));
 }

-static void test_xstrjoin_truncated_before_sep(void) {
+static void test_xstrjoin_truncated_before_sep() {
    const char *const tokens[] = { "abc", "de", "fghi", NULL };
    char s[] = "xxxxxx";
    size_t w = xstrjoin(s, tokens, ' ', sizeof(s));
@@ -111,7 +111,7 @@ static void test_xstrjoin_truncated_before_sep(void) {
    assert(!strcmp("abc de", s));
 }

-static void test_xstrjoin_truncated_after_sep(void) {
+static void test_xstrjoin_truncated_after_sep() {
    const char *const tokens[] = { "abc", "de", "fghi", NULL };
    char s[] = "xxxxxxx";
    size_t w = xstrjoin(s, tokens, ' ', sizeof(s));
@@ -126,7 +126,7 @@ static void test_xstrjoin_truncated_after_sep(void) {
    assert(!strcmp("abc de ", s));
 }

-int main(void) {
+int main() {
    test_xstrncpy_simple();
    test_xstrncpy_just_fit();
    test_xstrncpy_truncated();
--- a/build.gradle
+++ b/build.gradle
@@ -7,7 +7,7 @@ buildscript {
        jcenter()
    }
    dependencies {
-        classpath 'com.android.tools.build:gradle:3.1.1'
+        classpath 'com.android.tools.build:gradle:3.0.1'

        // NOTE: Do not place your application dependencies here; they belong
        // in the individual module build.gradle files
--- a/cross_win32.txt
+++ b/cross_win32.txt
@@ -1,20 +0,0 @@
-# apt install mingw-w64 mingw-w64-tools
-
-[binaries]
-name = 'mingw'
-c = '/usr/bin/i686-w64-mingw32-gcc'
-cpp = '/usr/bin/i686-w64-mingw32-g++'
-ar = '/usr/bin/i686-w64-mingw32-ar'
-strip = '/usr/bin/i686-w64-mingw32-strip'
-pkgconfig = '/usr/bin/i686-w64-mingw32-pkg-config'
-
-[host_machine]
-system = 'windows'
-cpu_family = 'x86'
-cpu = 'i686'
-endian = 'little'
-
-[properties]
-prebuilt_ffmpeg_shared = 'ffmpeg-4.0.2-win32-shared'
-prebuilt_ffmpeg_dev = 'ffmpeg-4.0.2-win32-dev'
-prebuilt_sdl2 = 'SDL2-2.0.8/i686-w64-mingw32'
--- a/cross_win64.txt
+++ b/cross_win64.txt
@@ -1,20 +0,0 @@
-# apt install mingw-w64 mingw-w64-tools
-
-[binaries]
-name = 'mingw'
-c = '/usr/bin/x86_64-w64-mingw32-gcc'
-cpp = '/usr/bin/x86_64-w64-mingw32-g++'
-ar = '/usr/bin/x86_64-w64-mingw32-ar'
-strip = '/usr/bin/x86_64-w64-mingw32-strip'
-pkgconfig = '/usr/bin/x86_64-w64-mingw32-pkg-config'
-
-[host_machine]
-system = 'windows'
-cpu_family = 'x86'
-cpu = 'x86_64'
-endian = 'little'
-
-[properties]
-prebuilt_ffmpeg_shared = 'ffmpeg-4.0.2-win64-shared'
-prebuilt_ffmpeg_dev = 'ffmpeg-4.0.2-win64-dev'
-prebuilt_sdl2 = 'SDL2-2.0.8/x86_64-w64-mingw32'
--- a/gradle/wrapper/gradle-wrapper.properties
+++ b/gradle/wrapper/gradle-wrapper.properties
@@ -1,6 +1,6 @@
-#Mon Jun 04 11:48:32 CEST 2018
+#Mon Jan 29 16:38:49 CET 2018
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-4.4-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-4.1-all.zip
--- a/meson.build
+++ b/meson.build
@@ -1,4 +1,4 @@
-project('scrcpy', 'c', meson_version: '>= 0.37', default_options : 'c_std=c11')
+project('scrcpy', 'c', meson_version: '>= 0.37')

 if get_option('build_app')
    subdir('app')
--- a/meson_options.txt
+++ b/meson_options.txt
@@ -1,8 +1,7 @@
 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')
 option('skip_frames', type: 'boolean', value: true, description: 'Always display the most recent frame')
 option('hidpi_support', type: 'boolean', value: true, description: 'Enable High DPI support')
+option('audio_support', type: 'boolean', value: true, description: 'Enable audio support')
--- a/prebuilt-deps/.gitignore
+++ b/prebuilt-deps/.gitignore
@@ -1,4 +0,0 @@
-*
-!/.gitignore
-!/Makefile
-!/prepare-dep
--- a/prebuilt-deps/Makefile
+++ b/prebuilt-deps/Makefile
@@ -1,40 +0,0 @@
-.PHONY: prepare-win32 prepare-win64 \
-	prepare-ffmpeg-shared-win32 \
-	prepare-ffmpeg-dev-win32 \
-	prepare-ffmpeg-shared-win64 \
-	prepare-ffmpeg-dev-win64 \
-	prepare-sdl2 \
-	prepare-adb
-
-prepare-win32: prepare-sdl2 prepare-ffmpeg-shared-win32 prepare-ffmpeg-dev-win32 prepare-adb
-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-4.0.2-win32-shared.zip \
-		cc190a3a4cf7bfbd4fbaa92609c1501a1de458055e6cfea8b745c1d515013aa8 \
-		ffmpeg-4.0.2-win32-shared
-
-prepare-ffmpeg-dev-win32:
-	@./prepare-dep https://ffmpeg.zeranoe.com/builds/win32/dev/ffmpeg-4.0.2-win32-dev.zip \
-		c72c74bad74ac0541f1b43090c26a50017c49041c182a703abd2057bb8cdc238 \
-		ffmpeg-4.0.2-win32-dev
-
-prepare-ffmpeg-shared-win64:
-	@./prepare-dep https://ffmpeg.zeranoe.com/builds/win64/shared/ffmpeg-4.0.2-win64-shared.zip \
-		ede566aca8b5348dff85570f9638c6bad33209f9419f79db7bde7daa37599bff \
-		ffmpeg-4.0.2-win64-shared
-
-prepare-ffmpeg-dev-win64:
-	@./prepare-dep https://ffmpeg.zeranoe.com/builds/win64/dev/ffmpeg-4.0.2-win64-dev.zip \
-		23ee994161c51285cb956b98d3caa499d48083dae7b26c1fdf77f22e98df1c5f \
-		ffmpeg-4.0.2-win64-dev
-
-prepare-sdl2:
-	@./prepare-dep https://libsdl.org/release/SDL2-devel-2.0.8-mingw.tar.gz \
-		ffff7305d634aff5e1df5b7bb935435c3a02c8b03ad94a1a2be9169a558a7961 \
-		SDL2-2.0.8
-
-prepare-adb:
-	@./prepare-dep https://dl.google.com/android/repository/platform-tools_r28.0.1-windows.zip \
-		db78f726d5dc653706dcd15a462ab1b946c643f598df76906c4c1858411c54df \
-		platform-tools
--- a/prebuilt-deps/prepare-dep
+++ b/prebuilt-deps/prepare-dep
@@ -1,58 +0,0 @@
-#!/bin/bash
-set -e
-url="$1"
-sum="$2"
-dir="$3"
-
-checksum() {
-    local file="$1"
-    local sum="$2"
-    echo "$file: verifying checksum..."
-    echo "$sum  $file" | sha256sum -c
-}
-
-get_file() {
-    local url="$1"
-    local file="$2"
-    local sum="$3"
-    if [[ -f "$file" ]]
-    then
-        echo "$file: found"
-    else
-        echo "$file: not found, downloading..."
-        wget "$url" -O "$file"
-    fi
-    checksum "$file" "$sum"
-}
-
-extract() {
-    local file="$1"
-    echo "Extracting $file..."
-    if [[ "$file" == *.zip ]]
-    then
-        unzip -q "$file"
-    elif [[ "$file" == *.tar.gz ]]
-    then
-        tar xf "$file"
-    else
-        echo "Unsupported file: $file"
-        return 1
-    fi
-}
-
-get_dep() {
-    local url="$1"
-    local sum="$2"
-    local dir="$3"
-    local file="${url##*/}"
-    if [[ -d "$dir" ]]
-    then
-        echo "$dir: found"
-    else
-        echo "$dir: not found"
-        get_file "$url" "$file" "$sum"
-        extract "$file"
-    fi
-}
-
-get_dep "$1" "$2" "$3"
--- a/server/build.gradle
+++ b/server/build.gradle
@@ -6,8 +6,8 @@ android {
        applicationId "com.genymobile.scrcpy"
        minSdkVersion 21
        targetSdkVersion 27
-        versionCode 5
-        versionName "1.4"
+        versionCode 2
+        versionName "1.1"
        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
    }
    buildTypes {
--- a/server/src/main/java/com/genymobile/scrcpy/DesktopConnection.java
+++ b/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 FileDescriptor fd;
+    private final OutputStream outputStream;

    private final ControlEventReader reader = new ControlEventReader();

    private DesktopConnection(LocalSocket socket) throws IOException {
        this.socket = socket;
        inputStream = socket.getInputStream();
-        fd = socket.getFileDescriptor();
+        outputStream = socket.getOutputStream();
    }

    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;
-        IO.writeFully(fd, buffer, 0, buffer.length);
+        outputStream.write(buffer, 0, buffer.length);
    }

-    public FileDescriptor getFd() {
-        return fd;
+    public OutputStream getOutputStream() {
+        return outputStream;
    }

    public ControlEvent receiveControlEvent() throws IOException {
--- a/server/src/main/java/com/genymobile/scrcpy/Device.java
+++ b/server/src/main/java/com/genymobile/scrcpy/Device.java
@@ -3,7 +3,6 @@ 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;
@@ -21,7 +20,7 @@ public final class Device {
    private RotationListener rotationListener;

    public Device(Options options) {
-        screenInfo = computeScreenInfo(options.getCrop(), options.getMaxSize());
+        screenInfo = computeScreenInfo(options.getMaxSize());
        registerRotationWatcher(new IRotationWatcher.Stub() {
            @Override
            public void onRotationChanged(int rotation) throws RemoteException {
@@ -41,40 +40,18 @@ 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 static Size computeVideoSize(int w, int h, int maxSize) {
+    private ScreenInfo computeScreenInfo(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)
-        w &= ~7; // in case it's not a multiple of 8
-        h &= ~7;
+        DisplayInfo displayInfo = serviceManager.getDisplayManager().getDisplayInfo();
+        boolean rotated = (displayInfo.getRotation() & 1) != 0;
+        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");
@@ -91,12 +68,12 @@ public final class Device {
            w = portrait ? minor : major;
            h = portrait ? major : minor;
        }
-        return new Size(w, h);
+        Size videoSize = new Size(w, h);
+        return new ScreenInfo(deviceSize, videoSize, rotated);
    }

    public Point getPhysicalPoint(Position position) {
-        // it hides the field on purpose, to read it with a lock
-        @SuppressWarnings("checkstyle:HiddenField")
+        @SuppressWarnings("checkstyle:HiddenField") // it hides the field on purpose, to read it with a lock
        ScreenInfo screenInfo = getScreenInfo(); // read with synchronization
        Size videoSize = screenInfo.getVideoSize();
        Size clientVideoSize = position.getScreenSize();
@@ -105,10 +82,10 @@ public final class Device {
            // the device may have been rotated since the event was generated, so ignore the event
            return null;
        }
-        Rect contentRect = screenInfo.getContentRect();
+        Size deviceSize = screenInfo.getDeviceSize();
        Point point = position.getPoint();
-        int scaledX = contentRect.left + point.x * contentRect.width() / videoSize.getWidth();
-        int scaledY = contentRect.top + point.y * contentRect.height() / videoSize.getHeight();
+        int scaledX = point.x * deviceSize.getWidth() / videoSize.getWidth();
+        int scaledY = point.y * deviceSize.getHeight() / videoSize.getHeight();
        return new Point(scaledX, scaledY);
    }

@@ -131,8 +108,4 @@ 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);
-    }
 }
--- a/server/src/main/java/com/genymobile/scrcpy/IO.java
+++ b/server/src/main/java/com/genymobile/scrcpy/IO.java
@@ -1,40 +0,0 @@
-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 {
-        // ByteBuffer position is not updated as expected by Os.write() on old Android versions, so
-        // count the remaining bytes manually.
-        // See <https://github.com/Genymobile/scrcpy/issues/291>.
-        int remaining = from.remaining();
-        while (remaining > 0) {
-            try {
-                int w = Os.write(fd, from);
-                if (BuildConfig.DEBUG && w < 0) {
-                    // w should not be negative, since an exception is thrown on error
-                    throw new AssertionError("Os.write() returned a negative value (" + w + ")");
-                }
-                remaining -= w;
-            } 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));
-    }
-}
--- a/server/src/main/java/com/genymobile/scrcpy/Options.java
+++ b/server/src/main/java/com/genymobile/scrcpy/Options.java
@@ -1,12 +1,9 @@
 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;
@@ -31,12 +28,4 @@ public class Options {
    public void setTunnelForward(boolean tunnelForward) {
        this.tunnelForward = tunnelForward;
    }
-
-    public Rect getCrop() {
-        return crop;
-    }
-
-    public void setCrop(Rect crop) {
-        this.crop = crop;
-    }
 }
--- a/server/src/main/java/com/genymobile/scrcpy/ScreenEncoder.java
+++ b/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, FileDescriptor fd) throws IOException {
+    public void streamScreen(Device device, OutputStream outputStream) 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 contentRect = device.getScreenInfo().getContentRect();
+                Rect deviceRect = device.getScreenInfo().getDeviceSize().toRect();
                Rect videoRect = device.getScreenInfo().getVideoSize().toRect();
                setSize(format, videoRect.width(), videoRect.height());
                configure(codec, format);
                Surface surface = codec.createInputSurface();
-                setDisplaySurface(display, surface, contentRect, videoRect);
+                setDisplaySurface(display, surface, deviceRect, videoRect);
                codec.start();
                try {
-                    alive = encode(codec, fd);
+                    alive = encode(codec, outputStream);
                } finally {
                    codec.stop();
                    destroyDisplay(display);
@@ -77,7 +77,9 @@ public class ScreenEncoder implements Device.RotationListener {
        }
    }

-    private boolean encode(MediaCodec codec, FileDescriptor fd) throws IOException {
+    private boolean encode(MediaCodec codec, OutputStream outputStream) 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) {
@@ -89,8 +91,15 @@ public class ScreenEncoder implements Device.RotationListener {
                    break;
                }
                if (outputBufferId >= 0) {
-                    ByteBuffer codecBuffer = codec.getOutputBuffer(outputBufferId);
-                    IO.writeFully(fd, codecBuffer);
+                    ByteBuffer outputBuffer = codec.getOutputBuffer(outputBufferId);
+                    while (outputBuffer.hasRemaining()) {
+                        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) {
--- a/server/src/main/java/com/genymobile/scrcpy/ScreenInfo.java
+++ b/server/src/main/java/com/genymobile/scrcpy/ScreenInfo.java
@@ -1,20 +1,18 @@
 package com.genymobile.scrcpy;

-import android.graphics.Rect;
-
 public final class ScreenInfo {
-    private final Rect contentRect; // device size, possibly cropped
+    private final Size deviceSize;
    private final Size videoSize;
    private final boolean rotated;

-    public ScreenInfo(Rect contentRect, Size videoSize, boolean rotated) {
-        this.contentRect = contentRect;
+    public ScreenInfo(Size deviceSize, Size videoSize, boolean rotated) {
+        this.deviceSize = deviceSize;
        this.videoSize = videoSize;
        this.rotated = rotated;
    }

-    public Rect getContentRect() {
-        return contentRect;
+    public Size getDeviceSize() {
+        return deviceSize;
    }

    public Size getVideoSize() {
@@ -26,6 +24,6 @@ public final class ScreenInfo {
        if (rotated == newRotated) {
            return this;
        }
-        return new ScreenInfo(Device.flipRect(contentRect), videoSize.rotate(), newRotated);
+        return new ScreenInfo(deviceSize.rotate(), videoSize.rotate(), newRotated);
    }
 }
--- a/server/src/main/java/com/genymobile/scrcpy/Server.java
+++ b/server/src/main/java/com/genymobile/scrcpy/Server.java
@@ -1,7 +1,5 @@
 package com.genymobile.scrcpy;

-import android.graphics.Rect;
-
 import java.io.IOException;

 public final class Server {
@@ -21,7 +19,7 @@ public final class Server {

            try {
                // synchronous
-                screenEncoder.streamScreen(device, connection.getFd());
+                screenEncoder.streamScreen(device, connection.getOutputStream());
            } catch (IOException e) {
                // this is expected on close
                Ln.d("Screen streaming stopped");
@@ -65,31 +63,9 @@ 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