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// 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 MEDIA_AUDIO_CLOCKLESS_AUDIO_SINK_H_
#define MEDIA_AUDIO_CLOCKLESS_AUDIO_SINK_H_
#include <memory>
#include <string>
#include "base/time/time.h"
#include "media/base/audio_renderer_sink.h"
namespace media {
class ClocklessAudioSinkThread;
// Implementation of an AudioRendererSink that consumes the audio as fast as
// possible. This class does not support multiple Play()/Pause() events.
class MEDIA_EXPORT ClocklessAudioSink : public AudioRendererSink {
public:
ClocklessAudioSink();
explicit ClocklessAudioSink(const OutputDeviceInfo& device_info);
ClocklessAudioSink(const ClocklessAudioSink&) = delete;
ClocklessAudioSink& operator=(const ClocklessAudioSink&) = delete;
// AudioRendererSink implementation.
void Initialize(const AudioParameters& params,
RenderCallback* callback) override;
void Start() override;
void Stop() override;
void Flush() override;
void Pause() override;
void Play() override;
bool SetVolume(double volume) override;
OutputDeviceInfo GetOutputDeviceInfo() override;
void GetOutputDeviceInfoAsync(OutputDeviceInfoCB info_cb) override;
bool IsOptimizedForHardwareParameters() override;
bool CurrentThreadIsRenderingThread() override;
// Returns the time taken to consume all the audio.
base::TimeDelta render_time() { return playback_time_; }
// Enables audio frame hashing. Must be called prior to Initialize().
void StartAudioHashForTesting();
// Returns the hash of all audio frames seen since construction.
std::string GetAudioHashForTesting();
void SetIsOptimizedForHardwareParametersForTesting(bool value);
protected:
~ClocklessAudioSink() override;
private:
const OutputDeviceInfo device_info_;
std::unique_ptr<ClocklessAudioSinkThread> thread_;
bool initialized_;
bool playing_;
bool hashing_;
bool is_optimized_for_hw_params_;
// Time taken in last set of Render() calls.
base::TimeDelta playback_time_;
};
} // namespace media
#endif // MEDIA_AUDIO_CLOCKLESS_AUDIO_SINK_H_
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