Migrate webkit/renderer/media/ to content/renderer/media/.

webkit/renderer/media/webaudiosourceprovider_impl.h

-// Copyright 2013 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.
-
-#ifndef WEBKIT_RENDERER_MEDIA_WEBAUDIOSOURCEPROVIDER_IMPL_H_
-#define WEBKIT_RENDERER_MEDIA_WEBAUDIOSOURCEPROVIDER_IMPL_H_
-
-#include "base/synchronization/lock.h"
-#include "media/base/audio_renderer_sink.h"
-#include "third_party/WebKit/public/platform/WebVector.h"
-#include "third_party/WebKit/public/web/WebAudioSourceProvider.h"
-
-namespace WebKit {
-class WebAudioSourceProviderClient;
-}
-
-namespace webkit_media {
-
-// WebAudioSourceProviderImpl provides a bridge between classes:
-//     WebKit::WebAudioSourceProvider <---> media::AudioRendererSink
-//
-// WebAudioSourceProviderImpl wraps an existing audio sink that is used unless
-// WebKit has set a client via setClient(). While a client is set WebKit will
-// periodically call provideInput() to render a certain number of audio
-// sample-frames using the sink's RenderCallback to get the data.
-//
-// All calls are protected by a lock.
-class WebAudioSourceProviderImpl
-    : public WebKit::WebAudioSourceProvider,
-      public media::AudioRendererSink {
- public:
-  explicit WebAudioSourceProviderImpl(
-      const scoped_refptr<media::AudioRendererSink>& sink);
-
-  // WebKit::WebAudioSourceProvider implementation.
-  virtual void setClient(WebKit::WebAudioSourceProviderClient* client);
-  virtual void provideInput(const WebKit::WebVector<float*>& audio_data,
-                            size_t number_of_frames);
-
-  // media::AudioRendererSink implementation.
-  virtual void Start() OVERRIDE;
-  virtual void Stop() OVERRIDE;
-  virtual void Play() OVERRIDE;
-  virtual void Pause() OVERRIDE;
-  virtual bool SetVolume(double volume) OVERRIDE;
-  virtual void Initialize(const media::AudioParameters& params,
-                          RenderCallback* renderer) OVERRIDE;
-
- protected:
-  virtual ~WebAudioSourceProviderImpl();
-
- private:
-  // Set to true when Initialize() is called.
-  int channels_;
-  int sample_rate_;
-  double volume_;
-
-  // Tracks the current playback state.
-  enum PlaybackState { kStopped, kStarted, kPlaying };
-  PlaybackState state_;
-
-  // Where audio comes from.
-  media::AudioRendererSink::RenderCallback* renderer_;
-
-  // When set via setClient() it overrides |sink_| for consuming audio.
-  WebKit::WebAudioSourceProviderClient* client_;
-
-  // Where audio ends up unless overridden by |client_|.
-  base::Lock sink_lock_;
-  scoped_refptr<media::AudioRendererSink> sink_;
-  scoped_ptr<media::AudioBus> bus_wrapper_;
-
-  DISALLOW_IMPLICIT_CONSTRUCTORS(WebAudioSourceProviderImpl);
-};
-
-}  // namespace webkit_media
-
-#endif  // WEBKIT_RENDERER_MEDIA_WEBAUDIOSOURCEPROVIDER_IMPL_H_