[cast] AAC encoder for OS X and iOS based on AudioConverter and AudioFile

media/cast/sender/audio_encoder.h

Index: media/cast/sender/audio_encoder.h
diff --git a/media/cast/sender/audio_encoder.h b/media/cast/sender/audio_encoder.h
index e0a3d8a5bafdb3aaa5b835f8674c59e21f002f34..f1fbd89a2512c84ce12985eb56897b91a20403e5 100644
--- a/media/cast/sender/audio_encoder.h
+++ b/media/cast/sender/audio_encoder.h
@@ -44,6 +44,7 @@ class AudioEncoder {
   class ImplBase;
   class OpusImpl;
   class Pcm16Impl;
+  class AacAudioConverterImpl;

[miu, 2014/09/29 19:54:47]

nit: I would prefer this class be named either AacImpl or AudioToolboxImpl. 
There is a media::AudioConverter class that we wouldn't want mixed up with the
concepts at-play here.

[jfroy, 2014/10/14 01:06:34]

I've picked AppleAacImpl to emphasize that this is an Apple platform specific
implementation without requiring the reader to know that AudioToolbox is an
Apple technology / name.

 
   const scoped_refptr<CastEnvironment> cast_environment_;
   scoped_refptr<ImplBase> impl_;