[PPAPI] Pepper MediaStream API audio track implementation and example.

ppapi/thunk/ppb_audio_frame_thunk.cc

 // Copyright 2014 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.
 
-// From ppb_audio_frame.idl modified Wed Jan 22 09:11:35 2014.
+// From ppb_audio_frame.idl modified Thu Jan 23 15:09:57 2014.
 
 #include "ppapi/c/pp_errors.h"
 #include "ppapi/c/ppb_audio_frame.h"
 #include "ppapi/shared_impl/tracked_callback.h"
 #include "ppapi/thunk/enter.h"
 #include "ppapi/thunk/ppapi_thunk_export.h"
 #include "ppapi/thunk/ppb_audio_frame_api.h"
 
 namespace ppapi {
 namespace thunk {
@@ skipping 15 matching lines @@
 }
 
 void SetTimestamp(PP_Resource frame, PP_TimeDelta timestamp) {
   VLOG(4) << "PPB_AudioFrame::SetTimestamp()";
   EnterResource<PPB_AudioFrame_API> enter(frame, true);
   if (enter.failed())
     return;
   enter.object()->SetTimestamp(timestamp);
 }
 
+PP_AudioFrame_SampleRate GetSampleRate(PP_Resource frame) {
+  VLOG(4) << "PPB_AudioFrame::GetSampleRate()";
+  EnterResource<PPB_AudioFrame_API> enter(frame, true);
+  if (enter.failed())
+    return PP_AUDIOFRAME_SAMPLERATE_UNKNOWN;
+  return enter.object()->GetSampleRate();
+}
+
 PP_AudioFrame_SampleSize GetSampleSize(PP_Resource frame) {
   VLOG(4) << "PPB_AudioFrame::GetSampleSize()";
   EnterResource<PPB_AudioFrame_API> enter(frame, true);
   if (enter.failed())
     return PP_AUDIOFRAME_SAMPLESIZE_UNKNOWN;
   return enter.object()->GetSampleSize();
 }
 
 uint32_t GetNumberOfChannels(PP_Resource frame) {
   VLOG(4) << "PPB_AudioFrame::GetNumberOfChannels()";
@@ skipping 24 matching lines @@
   EnterResource<PPB_AudioFrame_API> enter(frame, true);
   if (enter.failed())
     return 0;
   return enter.object()->GetDataBufferSize();
 }
 
 const PPB_AudioFrame_0_1 g_ppb_audioframe_thunk_0_1 = {
   &IsAudioFrame,
   &GetTimestamp,
   &SetTimestamp,
+  &GetSampleRate,
   &GetSampleSize,
   &GetNumberOfChannels,
   &GetNumberOfSamples,
   &GetDataBuffer,
   &GetDataBufferSize
 };
 
 }  // namespace
 
 PPAPI_THUNK_EXPORT const PPB_AudioFrame_0_1* GetPPB_AudioFrame_0_1_Thunk() {
   return &g_ppb_audioframe_thunk_0_1;
 }
 
 }  // namespace thunk
 }  // namespace ppapi