Source/WebCore/platform/audio/mac/AudioDestinationMac.h

/*
 * Copyright (C) 2010 Google Inc. All rights reserved.
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 * modification, are permitted provided that the following conditions
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 *     from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
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#ifndef AudioDestinationMac_h
#define AudioDestinationMac_h

#include "AudioBus.h"
#include "AudioDestination.h"
#include <AudioUnit/AudioUnit.h>
#include <wtf/RefPtr.h>

namespace WebCore {

// An AudioDestination using CoreAudio's default output AudioUnit

class AudioDestinationMac : public AudioDestination {
public:
    AudioDestinationMac(AudioIOCallback&, float sampleRate);
    virtual ~AudioDestinationMac();

private:
    void configure();

    // DefaultOutputUnit callback
    static OSStatus inputProc(void* userData, AudioUnitRenderActionFlags*, const AudioTimeStamp*, UInt32 busNumber, UInt32 numberOfFrames, AudioBufferList* ioData);

    OSStatus render(UInt32 numberOfFrames, AudioBufferList* ioData);
    void setIsPlaying(bool);

    void start() override;
    void stop() override;
    bool isPlaying() override { return m_isPlaying; }
    float sampleRate() const override { return m_sampleRate; }

    AudioUnit m_outputUnit;
    AudioIOCallback& m_callback;
    RefPtr<AudioBus> m_renderBus;

    float m_sampleRate;
    bool m_isPlaying;
};

} // namespace WebCore

#endif // AudioDestinationMac_h