AVAudioCaptureSource.h   [plain text]

/*
 * Copyright (C) 2013-2015 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
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#ifndef AVAudioCaptureSource_h
#define AVAudioCaptureSource_h

#if ENABLE(MEDIA_STREAM) && USE(AVFOUNDATION)

#include "AVMediaCaptureSource.h"
#include <wtf/Lock.h>

typedef struct AudioStreamBasicDescription AudioStreamBasicDescription;
typedef const struct opaqueCMFormatDescription *CMFormatDescriptionRef;

namespace WebCore {

class WebAudioSourceProviderAVFObjC;

class AVAudioCaptureSource : public AVMediaCaptureSource {
public:

    class Observer {
    public:
        virtual ~Observer() { }
        virtual void prepare(const AudioStreamBasicDescription *) = 0;
        virtual void unprepare() = 0;
        virtual void process(CMFormatDescriptionRef, CMSampleBufferRef) = 0;
    };

    static RefPtr<AVMediaCaptureSource> create(AVCaptureDevice*, const AtomicString&, PassRefPtr<MediaConstraints>);

    void addObserver(Observer*);
    void removeObserver(Observer*);

private:
    AVAudioCaptureSource(AVCaptureDevice*, const AtomicString&, PassRefPtr<MediaConstraints>);
    virtual ~AVAudioCaptureSource();
    
    void initializeCapabilities(RealtimeMediaSourceCapabilities&) override;
    void initializeSupportedConstraints(RealtimeMediaSourceSupportedConstraints&) override;

    void captureOutputDidOutputSampleBufferFromConnection(AVCaptureOutput*, CMSampleBufferRef, AVCaptureConnection*) override;
    
    void setupCaptureSession() override;
    void shutdownCaptureSession() override;
    void updateSettings(RealtimeMediaSourceSettings&) override;
    AudioSourceProvider* audioSourceProvider() override;

    RetainPtr<AVCaptureConnection> m_audioConnection;

    RefPtr<WebAudioSourceProviderAVFObjC> m_audioSourceProvider;
    std::unique_ptr<AudioStreamBasicDescription> m_inputDescription;
    Vector<Observer*> m_observers;
    Lock m_lock;
};

} // namespace WebCore

#endif // ENABLE(MEDIA_STREAM)

#endif // AVVideoCaptureSource_h