Source/WebCore/platform/mediastream/mac/CoreAudioCaptureDevice.h

/*
 * Copyright (C) 2017 Apple Inc. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#pragma once

#if ENABLE(MEDIA_STREAM) && PLATFORM(MAC)

#include "CaptureDevice.h"
#include <wtf/RefPtr.h>
#include <wtf/text/WTFString.h>

typedef struct OpaqueCMClock* CMClockRef;

namespace WebCore {

class CoreAudioCaptureDevice : public CaptureDevice {
public:

    static Optional<CoreAudioCaptureDevice> create(uint32_t);
    virtual ~CoreAudioCaptureDevice() = default;

    uint32_t deviceID() const { return m_deviceID; }
    RetainPtr<CMClockRef> deviceClock();
    bool isAlive();

private:
    CoreAudioCaptureDevice(uint32_t, const String& persistentID, const String& label);

    uint32_t m_deviceID { 0 };
    RetainPtr<CMClockRef> m_deviceClock;
};


} // namespace WebCore

#endif // ENABLE(MEDIA_STREAM) && PLATFORM(MAC)