Change FrameInput::InsertRawAudioFrame(PcmAudioFrame) interface to InsertAudio(AudioBus).

This is a prerequisite to "gluing" the Chrome audio capture implementation with CastSender in a later change.

Major changes:

1. AudioEncoder: Removed dependency on WebRTC ACM, using opus library directly.
2. AudioEncoder: Much moar unit testing.
3. AudioEncoder: Minor structural simplifications (e.g., provide FrameEncodedCallback to ctor, one sampling rate per instance).
4. AudioEncoder: Now populating EncodedAudioFrame::frame_id field.
5. End2EndTest: Replaced SNR code with simpler "crossing-zero counter" for confirming audio signals (works well even for resampled audio).

Review URL: https://codereview.chromium.org/51763003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@233571 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 5 insertions, 10 deletions

diff --git a/media/cast/cast_sender_impl.cc b/media/cast/cast_sender_impl.cc
index cbf7a4d..1bdd7c5 100644
--- a/media/cast/cast_sender_impl.cc
+++ b/media/cast/cast_sender_impl.cc
@@ -12,11 +12,6 @@ namespace media {
 namespace cast {
 
 // static
-void FrameInput::DeleteAudioFrame(const PcmAudioFrame* frame) {
-  delete frame;
-}
-
-// static
 void FrameInput::DeleteVideoFrame(const I420VideoFrame* video_frame) {
   delete [] video_frame->y_plane.data;
   delete [] video_frame->u_plane.data;
@@ -52,12 +47,12 @@ class LocalFrameInput : public FrameInput {
             video_frame, capture_time, callback));
   }
 
-  virtual void InsertRawAudioFrame(const PcmAudioFrame* audio_frame,
-                                   const base::TimeTicks& recorded_time,
-                                   const base::Closure callback) OVERRIDE {
+  virtual void InsertAudio(const AudioBus* audio_bus,
+                           const base::TimeTicks& recorded_time,
+                           const base::Closure& done_callback) OVERRIDE {
     cast_environment_->PostTask(CastEnvironment::MAIN, FROM_HERE,
-        base::Bind(&AudioSender::InsertRawAudioFrame, audio_sender_,
-            audio_frame, recorded_time, callback));
+        base::Bind(&AudioSender::InsertAudio, audio_sender_,
+            audio_bus, recorded_time, done_callback));
   }
 
   virtual void InsertCodedAudioFrame(const EncodedAudioFrame* audio_frame,