Source/WebCore/Modules/mediastream/RTCRtpReceiver.h

/*
 * Copyright (C) 2015 Ericsson AB. 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.
 * 3. Neither the name of Ericsson nor the names of its contributors
 *    may be used to endorse or promote products derived from this
 *    software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "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 THE COPYRIGHT
 * OWNER 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(WEB_RTC)

#include "MediaStreamTrack.h"
#include "RTCRtpReceiverBackend.h"
#include "RTCRtpSynchronizationSource.h"
#include "ScriptWrappable.h"

namespace WebCore {

class DeferredPromise;
class PeerConnectionBackend;
struct RTCRtpCapabilities;

class RTCRtpReceiver final : public RefCounted<RTCRtpReceiver>, public ScriptWrappable  {
    WTF_MAKE_ISO_ALLOCATED(RTCRtpReceiver);
public:
    static Ref<RTCRtpReceiver> create(PeerConnectionBackend& connection, Ref<MediaStreamTrack>&& track, std::unique_ptr<RTCRtpReceiverBackend>&& backend)
    {
        return adoptRef(*new RTCRtpReceiver(connection, WTFMove(track), WTFMove(backend)));
    }

    static Optional<RTCRtpCapabilities> getCapabilities(ScriptExecutionContext&, const String& kind);

    void stop();

    void setBackend(std::unique_ptr<RTCRtpReceiverBackend>&& backend) { m_backend = WTFMove(backend); }
    RTCRtpParameters getParameters() { return m_backend ? m_backend->getParameters() : RTCRtpParameters(); }
    Vector<RTCRtpContributingSource> getContributingSources() const { return m_backend ? m_backend->getContributingSources() : Vector<RTCRtpContributingSource> { }; }
    Vector<RTCRtpSynchronizationSource> getSynchronizationSources() const { return m_backend ? m_backend->getSynchronizationSources() : Vector<RTCRtpSynchronizationSource> { }; }

    MediaStreamTrack& track() { return m_track.get(); }

    RTCRtpReceiverBackend* backend() { return m_backend.get(); }
    void getStats(Ref<DeferredPromise>&&);

private:
    RTCRtpReceiver(PeerConnectionBackend&, Ref<MediaStreamTrack>&&, std::unique_ptr<RTCRtpReceiverBackend>&&);

    Ref<MediaStreamTrack> m_track;
    std::unique_ptr<RTCRtpReceiverBackend> m_backend;
    WeakPtr<PeerConnectionBackend> m_connection;
};

} // namespace WebCore

#endif // ENABLE(WEB_RTC)