Switch audio synchronization from sleep() based to select() based.

media/audio/audio_parameters.h

Index: media/audio/audio_parameters.h
diff --git a/media/audio/audio_parameters.h b/media/audio/audio_parameters.h
index 2817cd2c5a60d6dd5fb2be534662b004dd52fc7a..fd99c5defa866e5947b9084c6614a4eb6a4448ec 100644
--- a/media/audio/audio_parameters.h
+++ b/media/audio/audio_parameters.h
@@ -6,6 +6,7 @@
 #define MEDIA_AUDIO_AUDIO_PARAMETERS_H_
 
 #include "base/basictypes.h"
+#include "base/time/time.h"
 #include "media/base/channel_layout.h"
 #include "media/base/media_export.h"
 
@@ -68,6 +69,8 @@ class MEDIA_EXPORT AudioParameters {
   // Returns the number of bytes representing a frame of audio.
   int GetBytesPerFrame() const;
 
+  base::TimeDelta GetBufferDuration() const;

[henrika (OOO until Aug 14), 2013/08/20 07:50:30]

OK, I see that you have added this method. Please add comment about the fact
that the unit is in microseconds.

[DaleCurtis, 2013/09/11 01:16:03]

The resolution being limited to microseconds is a detail of TimeDelta, so I
don't think an extra comment is necessary.

+
   Format format() const { return format_; }
   ChannelLayout channel_layout() const { return channel_layout_; }
   int sample_rate() const { return sample_rate_; }