content/renderer/media/renderer_webaudiodevice_impl.h

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef CONTENT_RENDERER_MEDIA_MEDIA_RENDERER_WEBAUDIODEVICE_IMPL_H_
   6 #define CONTENT_RENDERER_MEDIA_MEDIA_RENDERER_WEBAUDIODEVICE_IMPL_H_
   7
   8 #include <vector>
   9
  10 #include "base/memory/ref_counted.h"
  11 #include "content/renderer/media/audio_device.h"
  12 #include "third_party/WebKit/Source/WebKit/chromium/public/platform/WebAudioDevice.h"
  13 #include "third_party/WebKit/Source/WebKit/chromium/public/platform/WebVector.h"
  14
  15 namespace media {
  16 class AudioParameters;
  17 }
  18
  19 class RendererWebAudioDeviceImpl
  20     : public WebKit::WebAudioDevice,
  21       public AudioDevice::RenderCallback {
  22  public:
  23   RendererWebAudioDeviceImpl(const media::AudioParameters& params,
  24                              WebKit::WebAudioDevice::RenderCallback* callback);
  25   virtual ~RendererWebAudioDeviceImpl();
  26
  27   // WebKit::WebAudioDevice implementation.
  28   virtual void start();
  29   virtual void stop();
  30   virtual double sampleRate();
  31
  32   // AudioDevice::RenderCallback implementation.
  33   virtual size_t Render(const std::vector<float*>& audio_data,
  34                         size_t number_of_frames,
  35                         size_t audio_delay_milliseconds) OVERRIDE;
  36   virtual void OnRenderError() OVERRIDE;
  37
  38  private:
  39   scoped_refptr<AudioDevice> audio_device_;
  40   bool is_running_;
  41
  42   // Weak reference to the callback into WebKit code.
  43   WebKit::WebAudioDevice::RenderCallback* client_callback_;
  44
  45   DISALLOW_COPY_AND_ASSIGN(RendererWebAudioDeviceImpl);
  46 };
  47
  48 #endif  // CONTENT_RENDERER_MEDIA_MEDIA_RENDERER_WEBAUDIODEVICE_IMPL_H_