Mojo interfaces needed for switching audio rendering stream creation and closing from IPC to Mojo

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 2c8a39c21c170cfc2570eafb9424121c1c8f12b3..7526a4dc1abd76dc7ad3a920ad3e2bc57cf63a48 100644
--- a/media/mojo/interfaces/media_types.mojom
+++ b/media/mojo/interfaces/media_types.mojom
@@ -6,6 +6,15 @@ module media.interfaces;
 
 import "ui/mojo/geometry/geometry.mojom";
 
+// See media/audio/audio_parameters.h for descriptions.
+// Kept in sync with media::AudioParameters::Format via static_asserts.
+enum AudioFormat {
+  AUDIO_PCM_LINEAR = 0,
+  AUDIO_PCM_LOW_LATENCY,
+  AUDIO_FAKE,
+  AUDIO_FORMAT_LAST = AUDIO_FAKE,
+};
+
 // See media/base/buffering_state.h for descriptions.
 // Kept in sync with media::BufferingState via static_asserts.
 enum BufferingState {
@@ -185,6 +194,19 @@ enum CipherMode {
   MAX = AES_CBC
 };
 
+// This defines a mojo transport format for media::AudioParameters.
+// See media/base/audio_parameters.h for description.
+struct AudioParameters {
+  AudioFormat format;
+  ChannelLayout channel_layout;
+  int32 channels;
+  int32 sample_rate;
+  int32 bits_per_sample;
+  int32 frames_per_buffer;
+  int32 effects;
+  // TODO(rchtara): add |mic_positions_| if needed.
+};
+
 // This defines a mojo transport format for media::EncryptionScheme::Pattern
 // See media/base/encryption_scheme.h for description.
 struct Pattern {