Simplified AudioOutputStream interface.

media/audio/audio_manager.h

Index: media/audio/audio_manager.h
diff --git a/media/audio/audio_manager.h b/media/audio/audio_manager.h
index 805db89e43d3a31d14ffc0014cd556abc67646d6..6fc8e12e8d015fcb66ca5958e741001cd8bcc636 100644
--- a/media/audio/audio_manager.h
+++ b/media/audio/audio_manager.h
@@ -26,14 +26,20 @@ class AudioManager {
   // sample rates.
   virtual bool HasAudioInputDevices() = 0;
 
-  // Factory for all the supported stream formats. The |channels| can be 1 to 5.
-  // The |sample_rate| is in hertz and can be any value supported by the
-  // platform. For some future formats the |sample_rate| and |bits_per_sample|
-  // can take special values.
+  // Factory for all the supported stream formats. |params| defines parameters
+  // of the audio stream to be created.
+  //
+  // |packet_size| is the requested buffer allocation which
+  // the audio source thinks it can usually fill without blocking. Internally
+  // two or three buffers of |packet_size| size are created, one will be
+  // locked for playback and one will be ready to be filled in the call to
+  // AudioSourceCallback::OnMoreData().
+  //
   // Returns NULL if the combination of the parameters is not supported, or if
   // we have reached some other platform specific limit.
   //
-  // AUDIO_PCM_LOW_LATENCY can be passed to this method and it has two effects:
+  // |params.format| can be set to AUDIO_PCM_LOW_LATENCY and that has two
+  // effects:
   // 1- Instead of triple buffered the audio will be double buffered.
   // 2- A low latency driver or alternative audio subsystem will be used when
   //    available.
@@ -53,8 +59,7 @@ class AudioManager {
   //
   // Do not free the returned AudioInputStream. It is owned by AudioManager.
   // When you are done with it, call |Stop()| and |Close()| to release it.
-  virtual AudioInputStream* MakeAudioInputStream(AudioParameters params,
-                                                 int samples_per_packet) = 0;
+  virtual AudioInputStream* MakeAudioInputStream(AudioParameters params) = 0;
 
   // Muting continues playback but effectively the volume is set to zero.
   // Un-muting returns the volume to the previous level.