Switch AudioRenderSink::Callback to use AudioBus.

media/filters/audio_renderer_impl.cc

Index: media/filters/audio_renderer_impl.cc
diff --git a/media/filters/audio_renderer_impl.cc b/media/filters/audio_renderer_impl.cc
index af376a42babf1ed0a56dfd4857cbc193692832dd..fab0083a034d9f118c4a49e6a4dd015ee02510bf 100644
--- a/media/filters/audio_renderer_impl.cc
+++ b/media/filters/audio_renderer_impl.cc
@@ -332,13 +332,12 @@ bool AudioRendererImpl::IsBeforePrerollTime(
       (buffer->GetTimestamp() + buffer->GetDuration()) < preroll_timestamp_;
 }
 
-int AudioRendererImpl::Render(const std::vector<float*>& audio_data,
+int AudioRendererImpl::Render(AudioBus* audio_bus,
                               int number_of_frames,
                               int audio_delay_milliseconds) {
   if (stopped_ || GetPlaybackRate() == 0.0f) {
     // Output silence if stopped.
-    for (size_t i = 0; i < audio_data.size(); ++i)
-      memset(audio_data[i], 0, sizeof(float) * number_of_frames);
+    audio_bus->ZeroFrames(number_of_frames);
     return 0;
   }
 
@@ -364,10 +363,10 @@ int AudioRendererImpl::Render(const std::vector<float*>& audio_data,
   UpdateEarliestEndTime(bytes_filled, request_delay, base::Time::Now());
 
   // Deinterleave each audio channel.
-  int channels = audio_data.size();
+  int channels = audio_bus->channels();
   for (int channel_index = 0; channel_index < channels; ++channel_index) {
     media::DeinterleaveAudioChannel(buf.get(),
-                                    audio_data[channel_index],
+                                    audio_bus->channel(channel_index),
                                     channels,
                                     channel_index,
                                     bytes_per_frame / channels,
@@ -376,9 +375,8 @@ int AudioRendererImpl::Render(const std::vector<float*>& audio_data,
     // If FillBuffer() didn't give us enough data then zero out the remainder.
     if (frames_filled < number_of_frames) {
       int frames_to_zero = number_of_frames - frames_filled;
-      memset(audio_data[channel_index] + frames_filled,
-             0,
-             sizeof(float) * frames_to_zero);
+      memset(audio_bus->channel(channel_index) + frames_filled, 0,
+             sizeof(*audio_bus->channel(channel_index)) * frames_to_zero);
     }
   }
   return frames_filled;