Source/WebCore/platform/mediastream/RealtimeIncomingVideoSource.cpp

/*
 * Copyright (C) 2017-2019 Apple Inc. All rights reserved.
 *
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 * modification, are permitted provided that the following conditions
 * are met:
 *
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 *    notice, this list of conditions and the following disclaimer.
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 *    notice, this list of conditions and the following disclaimer
 *    in the documentation and/or other materials provided with the
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 *    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
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#include "config.h"
#include "RealtimeIncomingVideoSource.h"

#if USE(LIBWEBRTC)

namespace WebCore {

RealtimeIncomingVideoSource::RealtimeIncomingVideoSource(rtc::scoped_refptr<webrtc::VideoTrackInterface>&& videoTrack, String&& videoTrackId)
    : RealtimeMediaSource(Type::Video, "remote video"_s, WTFMove(videoTrackId))
    , m_videoTrack(WTFMove(videoTrack))
{
    notifyMutedChange(!m_videoTrack);

    RealtimeMediaSourceSupportedConstraints constraints;
    constraints.setSupportsWidth(true);
    constraints.setSupportsHeight(true);
    m_currentSettings = RealtimeMediaSourceSettings { };
    m_currentSettings->setSupportedConstraints(WTFMove(constraints));
}

void RealtimeIncomingVideoSource::startProducingData()
{
    if (m_videoTrack)
        m_videoTrack->AddOrUpdateSink(this, rtc::VideoSinkWants());
}

void RealtimeIncomingVideoSource::setSourceTrack(rtc::scoped_refptr<webrtc::VideoTrackInterface>&& track)
{
    ASSERT(track);

    if (m_videoTrack && isProducingData())
        m_videoTrack->RemoveSink(this);
    m_videoTrack = WTFMove(track);
    notifyMutedChange(!m_videoTrack);
    if (isProducingData())
        m_videoTrack->AddOrUpdateSink(this, rtc::VideoSinkWants());
}

void RealtimeIncomingVideoSource::stopProducingData()
{
    if (m_videoTrack)
        m_videoTrack->RemoveSink(this);
}

const RealtimeMediaSourceCapabilities& RealtimeIncomingVideoSource::capabilities()
{
    return RealtimeMediaSourceCapabilities::emptyCapabilities();
}

const RealtimeMediaSourceSettings& RealtimeIncomingVideoSource::settings()
{
    if (m_currentSettings)
        return m_currentSettings.value();

    RealtimeMediaSourceSupportedConstraints constraints;
    constraints.setSupportsWidth(true);
    constraints.setSupportsHeight(true);

    RealtimeMediaSourceSettings settings;
    auto& size = this->size();
    settings.setWidth(size.width());
    settings.setHeight(size.height());
    settings.setSupportedConstraints(constraints);

    m_currentSettings = WTFMove(settings);
    return m_currentSettings.value();
}

void RealtimeIncomingVideoSource::settingsDidChange(OptionSet<RealtimeMediaSourceSettings::Flag> settings)
{
    if (settings.containsAny({ RealtimeMediaSourceSettings::Flag::Width, RealtimeMediaSourceSettings::Flag::Height }))
        m_currentSettings = WTF::nullopt;
}

} // namespace WebCore

#endif // USE(LIBWEBRTC)