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

#include "config.h"
#include "RTCRtpReceiver.h"

#if ENABLE(WEB_RTC)

#include "JSDOMPromiseDeferred.h"
#include "PeerConnectionBackend.h"
#include "RTCRtpCapabilities.h"
#include <wtf/IsoMallocInlines.h>

namespace WebCore {

WTF_MAKE_ISO_ALLOCATED_IMPL(RTCRtpReceiver);

RTCRtpReceiver::RTCRtpReceiver(PeerConnectionBackend& connection, Ref<MediaStreamTrack>&& track, std::unique_ptr<RTCRtpReceiverBackend>&& backend)
    : m_track(WTFMove(track))
    , m_backend(WTFMove(backend))
    , m_connection(makeWeakPtr(&connection))
{
}

RTCRtpReceiver::~RTCRtpReceiver()
{
    if (m_transform)
        m_transform->detachFromReceiver(*this);
}

void RTCRtpReceiver::stop()
{
    if (!m_backend)
        return;

    if (m_transform)
        m_transform->detachFromReceiver(*this);

    m_backend = nullptr;
    m_track->stopTrack(MediaStreamTrack::StopMode::PostEvent);
}

void RTCRtpReceiver::getStats(Ref<DeferredPromise>&& promise)
{
    if (!m_connection) {
        promise->reject(InvalidStateError);
        return;
    }
    m_connection->getStats(*this, WTFMove(promise));
}

Optional<RTCRtpCapabilities> RTCRtpReceiver::getCapabilities(ScriptExecutionContext& context, const String& kind)
{
    return PeerConnectionBackend::receiverCapabilities(context, kind);
}

ExceptionOr<void> RTCRtpReceiver::setTransform(Optional<RTCRtpTransform>&& transform)
{
    if (transform && m_transform && *transform == *m_transform)
        return { };
    if (transform && transform->isAttached())
        return Exception { InvalidStateError, "transform is already in use"_s };

    if (m_transform)
        m_transform->detachFromReceiver(*this);
    m_transform = WTFMove(transform);
    if (m_transform)
        m_transform->attachToReceiver(*this);

    return { };
}

Optional<RTCRtpTransform::Internal> RTCRtpReceiver::transform()
{
    if (!m_transform)
        return { };
    return m_transform->internalTransform();
}

} // namespace WebCore

#endif // ENABLE(WEB_RTC)
