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

media/mojo/interfaces/media_types.mojom

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 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 {
   HAVE_NOTHING,
   HAVE_ENOUGH,
 };
 
 // See media/base/audio_decoder_config.h for descriptions.
 // Kept in sync with media::AudioCodec via static_asserts.
 enum AudioCodec {
@@ skipping 159 matching lines @@
 
 // See media/base/encryption_scheme.h.
 // Kept in sync with media::CipherMode via static_asserts.
 enum CipherMode {
   UNENCRYPTED = 0,
   AES_CTR,
   AES_CBC,
   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.

[Mike West, 2016/05/04 10:56:17]

Nit: Drop trailing '_'.

[rchtara, 2016/05/05 15:59:44]

Done.

+};
+
 // This defines a mojo transport format for media::EncryptionScheme::Pattern
 // See media/base/encryption_scheme.h for description.
 struct Pattern {
   uint32 encrypt_blocks;
   uint32 skip_blocks;
 };
 
 // This defines a mojo transport format for media::EncryptionScheme.
 // See media/base/encryption_scheme.h for description.
 struct EncryptionScheme {
@@ skipping 124 matching lines @@
 
   // Stride and offsets for each plane. Offsets are relative to the start
   // of |frame_data|.
   int32 y_stride;
   int32 u_stride;
   int32 v_stride;
   uint64 y_offset;
   uint64 u_offset;
   uint64 v_offset;
 };