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

ppapi/cpp/audio_frame.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.
 
 #include "ppapi/cpp/audio_frame.h"
 
 #include "ppapi/cpp/module.h"
 #include "ppapi/cpp/module_impl.h"
 
 namespace pp {
@@ skipping 26 matching lines @@
   if (has_interface<PPB_AudioFrame_0_1>())
     return get_interface<PPB_AudioFrame_0_1>()->GetTimestamp(pp_resource());
   return 0.0;
 }
 
 void AudioFrame::SetTimestamp(PP_TimeDelta timestamp) {
   if (has_interface<PPB_AudioFrame_0_1>())
     get_interface<PPB_AudioFrame_0_1>()->SetTimestamp(pp_resource(), timestamp);
 }
 
-uint32_t AudioFrame::GetSampleSize() const {
+PP_AudioFrame_SampleRate AudioFrame::GetSampleRate() const {
+  if (has_interface<PPB_AudioFrame_0_1>())
+    return get_interface<PPB_AudioFrame_0_1>()->GetSampleRate(pp_resource());
+  return PP_AUDIOFRAME_SAMPLERATE_UNKNOWN;
+}
+
+PP_AudioFrame_SampleSize AudioFrame::GetSampleSize() const {
   if (has_interface<PPB_AudioFrame_0_1>())
     return get_interface<PPB_AudioFrame_0_1>()->GetSampleSize(pp_resource());
-  return 0;
+  return PP_AUDIOFRAME_SAMPLESIZE_UNKNOWN;
 }
 
 uint32_t AudioFrame::GetNumberOfChannels() const {
   if (has_interface<PPB_AudioFrame_0_1>()) {
     return get_interface<PPB_AudioFrame_0_1>()->GetNumberOfChannels(
         pp_resource());
   }
   return 0;
 }
 
@@ skipping 13 matching lines @@
 
 uint32_t AudioFrame::GetDataBufferSize() const {
   if (has_interface<PPB_AudioFrame_0_1>()) {
     return get_interface<PPB_AudioFrame_0_1>()->GetDataBufferSize(
         pp_resource());
   }
   return 0;
 }
 
 }  // namespace pp