Browser-wide audio mirroring for TabCapture API

media/audio/audio_parameters.h

 // Copyright (c) 2012 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.
 
 #ifndef MEDIA_AUDIO_AUDIO_PARAMETERS_H_
 #define MEDIA_AUDIO_AUDIO_PARAMETERS_H_
 
 #include "base/basictypes.h"
 #include "media/base/channel_layout.h"
 #include "media/base/media_export.h"
@@ skipping 12 matching lines @@
   AudioInputBufferParameters params;
   int8 audio[1];
 };
 
 class MEDIA_EXPORT AudioParameters {
  public:
   enum Format {
     AUDIO_PCM_LINEAR = 0,     // PCM is 'raw' amplitude samples.
     AUDIO_PCM_LOW_LATENCY,    // Linear PCM, low latency requested.
     AUDIO_FAKE,               // Creates a fake AudioOutputStream object.
-    AUDIO_LAST_FORMAT         // Only used for validation of format.
+    AUDIO_MIRROR_BROWSER,     // Audio streams from the entire browser.

[Alpha Left Google, 2012/11/28 01:04:47]

Is this for input or output, please clarify in the comments.

[justinlin, 2012/11/28 14:30:31]

Done.

+    AUDIO_LAST_FORMAT,        // Only used for validation of format.
   };
 
   enum {
     // Telephone quality sample rate, mostly for speech-only audio.
     kTelephoneSampleRate = 8000,
     // CD sampling rate is 44.1 KHz or conveniently 2x2x3x3x5x5x7x7.
     kAudioCDSampleRate = 44100,
   };
 
   AudioParameters();
@@ skipping 44 matching lines @@
   if (a.sample_rate() != b.sample_rate())
     return a.sample_rate() < b.sample_rate();
   if (a.bits_per_sample() != b.bits_per_sample())
     return a.bits_per_sample() < b.bits_per_sample();
   return a.frames_per_buffer() < b.frames_per_buffer();
 }
 
 }  // namespace media
 
 #endif  // MEDIA_AUDIO_AUDIO_PARAMETERS_H_