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
 
     - 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 ${{github.workspace}}/build -DBUILD_OMXPLAYER_VIDEO_PLAYER_PLUGIN=On -DBUILD_GSTREAMER_AUDIO_VIDEO_PLAYER_PLUGIN=off -DCMAKE_BUILD_TYPE=${{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 +40,8 @@ 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(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(BUILD_GSTREAMER_AUDIO_VIDEO_PLAYER_PLUGIN "Include the gstreamer based video and audio plugins in the finished binary. Allows for more stable, hardware accelerated video playback in flutter using gstreamer." ON)
+option(TRY_BUILD_GSTREAMER_AUDIO_VIDEO_PLAYER_PLUGIN "Don't throw an error if the gstreamer libs aren't found, instead just don't build the gstreamer audio and video player plugin in that case." 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)
@@ -191,26 +191,30 @@ endif()
 if (OMXPLAYER_SUPPORTS_RUNTIME_ROTATION)
   target_compile_definitions(flutter-pi PRIVATE "OMXPLAYER_SUPPORTS_RUNTIME_ROTATION")
 endif()
-if (BUILD_GSTREAMER_VIDEO_PLAYER_PLUGIN)
-  if (TRY_BUILD_GSTREAMER_VIDEO_PLAYER_PLUGIN)
+if (BUILD_GSTREAMER_AUDIO_VIDEO_PLAYER_PLUGIN)
+  if (TRY_BUILD_GSTREAMER_AUDIO_VIDEO_PLAYER_PLUGIN)
     pkg_check_modules(LIBGSTREAMER gstreamer-1.0)
     pkg_check_modules(LIBGSTREAMER_PLUGINS_BASE gstreamer-plugins-base-1.0)
     pkg_check_modules(LIBGSTREAMER_APP gstreamer-app-1.0)
     pkg_check_modules(LIBGSTREAMER_ALLOCATORS gstreamer-allocators-1.0)
     pkg_check_modules(LIBGSTREAMER_VIDEO gstreamer-video-1.0)
+    pkg_check_modules(LIBGSTREAMER-AUDIO REQUIRED gstreamer-audio-1.0)
   else()
     pkg_check_modules(LIBGSTREAMER REQUIRED gstreamer-1.0)
     pkg_check_modules(LIBGSTREAMER_PLUGINS_BASE REQUIRED gstreamer-plugins-base-1.0)
     pkg_check_modules(LIBGSTREAMER_APP REQUIRED gstreamer-app-1.0)
     pkg_check_modules(LIBGSTREAMER_ALLOCATORS REQUIRED gstreamer-allocators-1.0)
     pkg_check_modules(LIBGSTREAMER_VIDEO REQUIRED gstreamer-video-1.0)
+    pkg_check_modules(LIBGSTREAMER-AUDIO REQUIRED gstreamer-audio-1.0)
   endif()
 
   if (LIBGSTREAMER_FOUND AND LIBGSTREAMER_PLUGINS_BASE_FOUND AND LIBGSTREAMER_APP_FOUND AND LIBGSTREAMER_ALLOCATORS_FOUND AND LIBGSTREAMER_VIDEO_FOUND)
     target_sources(flutter-pi PRIVATE
       src/plugins/gstreamer_video_player/plugin.c
       src/plugins/gstreamer_video_player/player.c
       src/plugins/gstreamer_video_player/frame.c
+      src/plugins/audioplayers/plugin.c
+      src/plugins/audioplayers/player.c
     )
     target_compile_definitions(flutter-pi PRIVATE "BUILD_GSTREAMER_VIDEO_PLAYER_PLUGIN")
     target_link_libraries(flutter-pi
@@ -219,20 +223,23 @@ 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.")

include/plugins/audioplayers.h

@@ -0,0 +1,41 @@
+#ifndef AUDIOPLAYERS_H_
+#define AUDIOPLAYERS_H_
+
+#include <stdbool.h>
+#include <stdint.h>
+
+#include <gst/gst.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_loopin(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_dispose(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_