| // 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 CONTENT_PUBLIC_RENDERER_MEDIA_STREAM_AUDIO_RENDERER_H_ |
| #define CONTENT_PUBLIC_RENDERER_MEDIA_STREAM_AUDIO_RENDERER_H_ |
| |
| #include <string> |
| |
| #include "base/callback.h" |
| #include "base/memory/ref_counted.h" |
| #include "base/time/time.h" |
| #include "media/base/output_device.h" |
| #include "url/gurl.h" |
| |
| namespace content { |
| |
| class MediaStreamAudioRenderer |
| : public base::RefCountedThreadSafe<MediaStreamAudioRenderer> { |
| public: |
| // Starts rendering audio. |
| virtual void Start() = 0; |
| |
| // Stops rendering audio. |
| virtual void Stop() = 0; |
| |
| // Resumes rendering audio after being paused. |
| virtual void Play() = 0; |
| |
| // Temporarily suspends rendering audio. The audio stream might still be |
| // active but new audio data is not provided to the consumer. |
| virtual void Pause() = 0; |
| |
| // Sets the output volume. |
| virtual void SetVolume(float volume) = 0; |
| |
| // Returns a pointer to the internal output device. |
| // The pointer is not to be owned by the caller and is valid only during |
| // the lifetime of the MediaStreamAudioRenderer. |
| // It can be null, which means that access to the output device is not |
| // supported. |
| virtual media::OutputDevice* GetOutputDevice() = 0; |
| |
| // Time stamp that reflects the current render time. Should not be updated |
| // when paused. |
| virtual base::TimeDelta GetCurrentRenderTime() const = 0; |
| |
| // Returns true if the implementation is a local renderer and false |
| // otherwise. |
| virtual bool IsLocalRenderer() const = 0; |
| |
| protected: |
| friend class base::RefCountedThreadSafe<MediaStreamAudioRenderer>; |
| |
| virtual ~MediaStreamAudioRenderer() {} |
| }; |
| |
| } // namespace content |
| |
| #endif // CONTENT_PUBLIC_RENDERER_MEDIA_STREAM_AUDIO_RENDERER_H_ |