Source/WebCore/page/MediaProducer.h

/*
 * Copyright (C) 2014 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.
 */

#pragma once

#include <wtf/WeakPtr.h>

namespace WebCore {

class MediaProducer : public CanMakeWeakPtr<MediaProducer> {
public:
    enum MediaState {
        IsNotPlaying = 0,
        IsPlayingAudio = 1 << 0,
        IsPlayingVideo = 1 << 1,
        IsPlayingToExternalDevice = 1 << 2,
        RequiresPlaybackTargetMonitoring = 1 << 3,
        ExternalDeviceAutoPlayCandidate = 1 << 4,
        DidPlayToEnd = 1 << 5,
        IsSourceElementPlaying = 1 << 6,
        IsNextTrackControlEnabled = 1 << 7,
        IsPreviousTrackControlEnabled = 1 << 8,
        HasPlaybackTargetAvailabilityListener = 1 << 9,
        HasAudioOrVideo = 1 << 10,
        HasActiveAudioCaptureDevice = 1 << 11,
        HasActiveVideoCaptureDevice = 1 << 12,
        HasMutedAudioCaptureDevice = 1 << 13,
        HasMutedVideoCaptureDevice = 1 << 14,
        HasInterruptedAudioCaptureDevice = 1 << 15,
        HasInterruptedVideoCaptureDevice = 1 << 16,
        HasUserInteractedWithMediaElement = 1 << 17,
        HasActiveDisplayCaptureDevice = 1 << 18,
        HasMutedDisplayCaptureDevice = 1 << 19,
        HasInterruptedDisplayCaptureDevice = 1 << 20,

        AudioCaptureMask = HasActiveAudioCaptureDevice | HasMutedAudioCaptureDevice | HasInterruptedAudioCaptureDevice,
        VideoCaptureMask = HasActiveVideoCaptureDevice | HasMutedVideoCaptureDevice | HasInterruptedVideoCaptureDevice,
        DisplayCaptureMask = HasActiveDisplayCaptureDevice | HasMutedDisplayCaptureDevice | HasInterruptedDisplayCaptureDevice,
        MutedCaptureMask =  HasMutedAudioCaptureDevice | HasMutedVideoCaptureDevice | HasMutedDisplayCaptureDevice,
        MediaCaptureMask = AudioCaptureMask | VideoCaptureMask | DisplayCaptureMask,
    };
    typedef unsigned MediaStateFlags;

    static bool isCapturing(MediaStateFlags state) { return (state & HasActiveAudioCaptureDevice) || (state & HasActiveVideoCaptureDevice) || (state & HasMutedAudioCaptureDevice) || (state & HasMutedVideoCaptureDevice); }

    virtual MediaStateFlags mediaState() const = 0;

    enum MutedState {
        NoneMuted = 0,
        AudioIsMuted = 1 << 0,
        AudioAndVideoCaptureIsMuted = 1 << 1,
        ScreenCaptureIsMuted = 1 << 2,

        MediaStreamCaptureIsMuted = AudioAndVideoCaptureIsMuted | ScreenCaptureIsMuted,
    };
    typedef unsigned MutedStateFlags;

    virtual void pageMutedStateDidChange() = 0;

protected:
    virtual ~MediaProducer() = default;
};

} // namespace WebCore