Moving FIFO from AudioDestination to RendererWebAudioDeviceImpl

content/renderer/media/renderer_webaudiodevice_impl.h

Index: content/renderer/media/renderer_webaudiodevice_impl.h
diff --git a/content/renderer/media/renderer_webaudiodevice_impl.h b/content/renderer/media/renderer_webaudiodevice_impl.h
index 48e7fad2d6a17cbe2c9afb6ad6549aacf3e6c04d..fd5827fbf2904629da417d19808bd717b0015ebe 100644
--- a/content/renderer/media/renderer_webaudiodevice_impl.h
+++ b/content/renderer/media/renderer_webaudiodevice_impl.h
@@ -23,6 +23,7 @@ class SingleThreadTaskRunner;
 
 namespace media {
 class NullAudioSink;
+class AudioPullFifo;
 }
 
 namespace content {
@@ -50,7 +51,14 @@ class RendererWebAudioDeviceImpl
   void OnRenderError() override;
 
  private:
-  const media::AudioParameters params_;
+  // Called by AudioPullFifo when more data is necessary.
+  void SourceCallback(int fifo_frames_delay, media::AudioBus* audio_bus);
+
+  // Creates a FIFO to rebuffer audio between the client and the sink.
+  void CreateFifoIfRequired(int render_frames_per_buffer);
+
+  // Parameters of audio being pulled from the client.
+  const media::AudioParameters client_params_;
 
   // Weak reference to the callback into WebKit code.
   blink::WebAudioDevice::RenderCallback* const client_callback_;
@@ -92,6 +100,10 @@ class RendererWebAudioDeviceImpl
   // Security origin, used to check permissions for |output_device_|.
   url::Origin security_origin_;
 
+  // Used to buffer data between the client and the sink in cases where
+  // the client buffer size is not the same as rendering buffer size.
+  std::unique_ptr<media::AudioPullFifo> audio_fifo_;
+
   DISALLOW_COPY_AND_ASSIGN(RendererWebAudioDeviceImpl);
 };