media: scaffolding and plumbing for MojoRenderer{Impl, Service}

media/mojo/interfaces/media_types.mojom

Index: media/mojo/interfaces/media_types.mojom
diff --git a/media/mojo/interfaces/media_types.mojom b/media/mojo/interfaces/media_types.mojom
index 007ceb1baec2238cb5e3e4dbcad9292d0a3df5a3..709f8f0bb534258a8bf447b929003cf15ee5dace 100644
--- a/media/mojo/interfaces/media_types.mojom
+++ b/media/mojo/interfaces/media_types.mojom
@@ -4,18 +4,98 @@
 
 module mojo {
 
+// See media/base/buffering_state.h for descriptions.
+// Kept in sync with media::BufferingState via COMPILE_ASSERTs.
 enum BufferingState {
-  // Indicates that there is no data buffered.
-  //
-  // Typical reason is data underflow and hence playback should be paused.
   HAVE_NOTHING,
-
-  // Indicates that enough data has been buffered.
-  //
-  // Typical reason is enough data has been prerolled to start playback.
   HAVE_ENOUGH,
 };
 
+// See media/base/audio_decoder_config.h for descriptions.
+// Kept in sync with media::AudioCodec via COMPILE_ASSERTs.
+enum AudioCodec {
+  UNKNOWN = 0,
+  AAC = 1,
+  MP3 = 2,
+  PCM = 3,
+  Vorbis = 4,
+  FLAC = 5,
+  AMR_NB = 6,
+  AMR_WB = 7,
+  PCM_MULAW = 8,
+  GSM_MS = 9,
+  PCM_S16BE = 10,
+  PCM_S24BE = 11,
+  Opus = 12,
+  // EAC3 = 13,
+  PCM_ALAW = 14,
+  MAX = PCM_ALAW,
+};
+
+// See media/base/channel_layout.h for descriptions.
+// Kept in sync with media::ChannelLayout via COMPILE_ASSERTs.
+// TODO(tim): The bindings generators will always prepend the enum name, should
+// mojom therefore allow enum values starting with numbers?
+enum ChannelLayout {
+  k_NONE = 0,
+  k_UNSUPPORTED = 1,
+  k_MONO = 2,
+  k_STEREO = 3,
+  k_2_1 = 4,
+  k_SURROUND = 5,
+  k_4_0 = 6,
+  k_2_2 = 7,
+  k_QUAD = 8,
+  k_5_0 = 9,
+  k_5_1 = 10,
+  k_5_0_BACK = 11,
+  k_5_1_BACK = 12,
+  k_7_0 = 13,
+  k_7_1 = 14,
+  k_7_1_WIDE = 15,
+  k_STEREO_DOWNMIX = 16,
+  k_2POINT1 = 17,
+  k_3_1 = 18,
+  k_4_1 = 19,
+  k_6_0 = 20,
+  k_6_0_FRONT = 21,
+  k_HEXAGONAL = 22,
+  k_6_1 = 23,
+  k_6_1_BACK = 24,
+  k_6_1_FRONT = 25,
+  k_7_0_FRONT = 26,
+  k_7_1_WIDE_BACK = 27,
+  k_OCTAGONAL = 28,
+  k_DISCRETE = 29,
+  k_STEREO_AND_KEYBOARD_MIC = 30,
+  k_MAX = k_STEREO_AND_KEYBOARD_MIC
+};
+
+// See media/base/sample_format.h for descriptions.
+// Kept in sync with media::SampleFormat via COMPILE_ASSERTs.
+enum SampleFormat {
+  UNKNOWN = 0,
+  U8,
+  S16,
+  S32,
+  F32,
+  PlanarS16,
+  PlanarF32,
+  Max = PlanarF32,
+};
+
+// This defines a mojo transport format for media::AudioDecoderConfig.
+// See media/base/audio_decoder_config.h for descriptions.
+struct AudioDecoderConfig {
+  AudioCodec codec;
+  SampleFormat sample_format;
+  ChannelLayout channel_layout;
+  int32 samples_per_second;
+  uint8[]? extra_data;
+  int64 seek_preroll_usec;
+  int32 codec_delay;
+};
+
 // This defines a mojo transport format for media::DecoderBuffer.
 struct MediaDecoderBuffer {
   // See media/base/buffers.h for details.