Add gstreamer based audioplayers plugin

.github/workflows/cmake.yml

@@ -21,14 +21,14 @@ jobs:
 
     steps:
     - uses: actions/checkout@v2
-    
+
     - name: Install dependencies
-      run: sudo apt-get install -y cmake libgl1-mesa-dev libgles2-mesa-dev libegl1-mesa-dev libdrm-dev libgbm-dev ttf-mscorefonts-installer fontconfig libsystemd-dev libinput-dev libudev-dev  libxkbcommon-dev ninja-build
+      run: sudo apt-get install -y cmake libgl1-mesa-dev libgles2-mesa-dev libegl1-mesa-dev libdrm-dev libgbm-dev ttf-mscorefonts-installer fontconfig libsystemd-dev libinput-dev libudev-dev  libxkbcommon-dev ninja-build libgstreamer-plugins-base1.0-dev
 
     - name: Configure CMake
       # Configure CMake in a 'build' subdirectory. `CMAKE_BUILD_TYPE` is only required if you are using a single-configuration generator such as make.
       # See https://cmake.org/cmake/help/latest/variable/CMAKE_BUILD_TYPE.html?highlight=cmake_build_type
-      run: cmake -B ${{github.workspace}}/build -DBUILD_OMXPLAYER_VIDEO_PLAYER_PLUGIN=On -DCMAKE_BUILD_TYPE=${{env.BUILD_TYPE}} -GNinja
+      run: cmake -B ${{github.workspace}}/build -DBUILD_OMXPLAYER_VIDEO_PLAYER_PLUGIN=On -DBUILD_GSTREAMER_AUDIO_PLAYER_PLUGIN=On -DBUILD_GSTREAMER_VIDEO_PLAYER_PLUGIN=On -DCMAKE_BUILD_TYPE=${{env.BUILD_TYPE}} -GNinja
 
     - name: Build
       # Build your program with the given configuration
@@ -37,7 +37,7 @@ jobs:
     - name: Test
       if: false
       working-directory: ${{github.workspace}}/build
-      # Execute tests defined by the CMake configuration.  
+      # Execute tests defined by the CMake configuration.
       # See https://cmake.org/cmake/help/latest/manual/ctest.1.html for more detail
       run: ctest -C ${{env.BUILD_TYPE}}
-      
+

CMakeLists.txt

@@ -40,8 +40,10 @@ option(BUILD_TEXT_INPUT_PLUGIN "Include the text input plugin in the finished bi
 option(BUILD_RAW_KEYBOARD_PLUGIN "Include the raw keyboard plugin in the finished binary. Enables raw keycode listening in flutter via the flutter RawKeyboard interface." ON)
 option(BUILD_TEST_PLUGIN "Include the test plugin in the finished binary. Allows testing platform channel communication." OFF)
 option(BUILD_OMXPLAYER_VIDEO_PLAYER_PLUGIN "Include the omxplayer_video_player plugin in the finished binary. Allows for hardware accelerated video playback in flutter using omxplayer." ON)
-option(BUILD_GSTREAMER_VIDEO_PLAYER_PLUGIN "Include the gstreamer_video_player plugin in the finished binary. Allows for more stable, hardware accelerated video playback in flutter using gstreamer." ON)
+option(BUILD_GSTREAMER_VIDEO_PLAYER_PLUGIN "Include the gstreamer based video plugins in the finished binary. Allows for more stable, hardware accelerated video playback in flutter using gstreamer." ON)
+option(BUILD_GSTREAMER_AUDIO_PLAYER_PLUGIN "Include the gstreamer based audio plugins in the finished binary." ON)
 option(TRY_BUILD_GSTREAMER_VIDEO_PLAYER_PLUGIN "Don't throw an error if the gstreamer libs aren't found, instead just don't build the gstreamer video player plugin in that case." ON)
+option(TRY_BUILD_GSTREAMER_AUDIO_PLAYER_PLUGIN "Don't throw an error if the gstreamer libs aren't found, instead just don't build gstreamer audio plugin." ON)
 option(DUMP_ENGINE_LAYERS "True if flutter-pi should dump the list of rendering layers that the flutter engine sends to flutter-pi on each draw." OFF)
 option(ENABLE_TSAN "True to build & link with -fsanitize=thread" OFF)
 option(ENABLE_ASAN "True to build & link with -fsanitize=address" OFF)
@@ -130,7 +132,7 @@ target_link_libraries(flutter-pi
   ${GBM_LDFLAGS}
   ${EGL_LDFLAGS}
   ${GLESV2_LDFLAGS}
-  EGL 
+  EGL
   systemd #${LIBSYSTEMD_LDFLAGS}
   input #${LIBINPUT_LDFLAGS}
   xkbcommon #${LIBUDEV_LDFLAGS}
@@ -153,7 +155,7 @@ target_include_directories(flutter-pi PRIVATE
 )
 
 target_compile_options(flutter-pi PRIVATE
-  ${DRM_CFLAGS}  
+  ${DRM_CFLAGS}
   ${GBM_CFLAGS}
   ${EGL_CFLAGS}
   ${GLESV2_CFLAGS}
@@ -166,7 +168,7 @@ target_compile_options(flutter-pi PRIVATE
   $<$<CONFIG:Release>:-O2 -Wall -Wextra -Wno-unused-function -Wno-sign-compare -Wno-missing-field-initializers -ggdb>
 )
 
-# TODO: Just unconditionally define those, make them optional later 
+# TODO: Just unconditionally define those, make them optional later
 target_compile_definitions(flutter-pi PRIVATE HAS_KMS HAS_EGL HAS_GBM HAS_FBDEV)
 
 # TODO: We actually don't need the compile definitions anymore, except for
@@ -219,26 +221,66 @@ if (BUILD_GSTREAMER_VIDEO_PLAYER_PLUGIN)
       ${LIBGSTREAMER_APP_LDFLAGS}
       ${LIBGSTREAMER_ALLOCATORS_LDFLAGS}
       ${LIBGSTREAMER_VIDEO_LDFLAGS}
+      ${LIBGSTREAMER_AUDIO_LIBRARY_DIRS}
     )
     target_include_directories(flutter-pi PRIVATE
       ${LIBGSTREAMER_INCLUDE_DIRS}
       ${LIBGSTREAMER_PLUGINS_BASE_INCLUDE_DIRS}
       ${LIBGSTREAMER_APP_INCLUDE_DIRS}
       ${LIBGSTREAMER_ALLOCATORS_INCLUDE_DIRS}
       ${LIBGSTREAMER_VIDEO_INCLUDE_DIRS}
+      ${LIBGSTREAMER_AUDIO_INCLUDE_DIRS}
     )
     target_compile_options(flutter-pi PRIVATE
       ${LIBGSTREAMER_CFLAGS}
       ${LIBGSTREAMER_PLUGINS_BASE_CFLAGS}
       ${LIBGSTREAMER_APP_CFLAGS}
       ${LIBGSTREAMER_ALLOCATORS_CFLAGS}
       ${LIBGSTREAMER_VIDEO_CFLAGS}
+      ${LIBGSTREAMER_AUDIO_CFLAGS}
     )
   else()
     message(NOTICE "Couldn't find gstreamer libraries. Gstreamer video player plugin won't be build.")
   endif()
 endif()
 
+if (BUILD_GSTREAMER_AUDIO_PLAYER_PLUGIN)
+  if (TRY_BUILD_GSTREAMER_AUDIO_PLAYER_PLUGIN)
+    pkg_check_modules(LIBGSTREAMER gstreamer-1.0)
+    pkg_check_modules(LIBGSTREAMER_APP gstreamer-app-1.0)
+    pkg_check_modules(LIBGSTREAMER_AUDIO gstreamer-audio-1.0)
+  else()
+    pkg_check_modules(LIBGSTREAMER REQUIRED gstreamer-1.0)
+    pkg_check_modules(LIBGSTREAMER_APP REQUIRED gstreamer-app-1.0)
+    pkg_check_modules(LIBGSTREAMER_AUDIO REQUIRED gstreamer-audio-1.0)
+  endif()
+
+  if (LIBGSTREAMER_FOUND AND LIBGSTREAMER_APP_FOUND AND LIBGSTREAMER_AUDIO_FOUND)
+    target_sources(flutter-pi PRIVATE
+      src/plugins/audioplayers/plugin.c
+      src/plugins/audioplayers/player.c
+    )
+    target_compile_definitions(flutter-pi PRIVATE "BUILD_GSTREAMER_AUDIO_PLAYER_PLUGIN")
+    target_link_libraries(flutter-pi
+      ${LIBGSTREAMER_LDFLAGS}
+      ${LIBGSTREAMER_APP_LDFLAGS}
+      ${LIBGSTREAMER_AUDIO_LIBRARY_DIRS}
+    )
+    target_include_directories(flutter-pi PRIVATE
+      ${LIBGSTREAMER_INCLUDE_DIRS}
+      ${LIBGSTREAMER_APP_INCLUDE_DIRS}
+      ${LIBGSTREAMER_AUDIO_INCLUDE_DIRS}
+    )
+    target_compile_options(flutter-pi PRIVATE
+      ${LIBGSTREAMER_CFLAGS}
+      ${LIBGSTREAMER_APP_CFLAGS}
+      ${LIBGSTREAMER_AUDIO_CFLAGS}
+    )
+  else()
+    message(NOTICE "Couldn't find gstreamer libraries. Gstreamer audio player plugin won't be build.")
+  endif()
+endif()
+
 # Needed so dart VM can actually resolve symbols in the same
 # executable.
 target_link_options(flutter-pi PRIVATE

include/plugins/audioplayers.h

@@ -0,0 +1,39 @@
+#ifndef AUDIOPLAYERS_H_
+#define AUDIOPLAYERS_H_
+
+#include <stdbool.h>
+#include <stdint.h>
+
+struct audio_player;
+
+struct audio_player *audio_player_new(char *playerId, char *channel);
+
+// Instance function
+
+int64_t audio_player_get_position(struct audio_player *self);
+
+int64_t audio_player_get_duration(struct audio_player *self);
+
+bool audio_player_get_looping(struct audio_player *self);
+
+void audio_player_play(struct audio_player *self);
+
+void audio_player_pause(struct audio_player *self);
+
+void audio_player_resume(struct audio_player *self);
+
+void audio_player_destroy(struct audio_player *self);
+
+void audio_player_set_looping(struct audio_player *self, bool isLooping);
+
+void audio_player_set_volume(struct audio_player *self, double volume);
+
+void audio_player_set_playback_rate(struct audio_player *self, double rate);
+
+void audio_player_set_position(struct audio_player *self, int64_t position);
+
+void audio_player_set_source_url(struct audio_player *self, char *url);
+
+bool audio_player_is_id(struct audio_player *self, char *id);
+
+#endif  // AUDIOPLAYERS_H_