File: MockDisplayCaptureSourceGStreamer.cpp

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/*
 * Copyright (C) 2018 Metrological Group B.V.
 * Copyright (C) 2020 Igalia S.L.
 * Author: Thibault Saunier <tsaunier@igalia.com>
 * Author: Alejandro G. Castro <alex@igalia.com>
 * Copyright (C) 2021 Apple Inc. All rights reserved.
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Library General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Library General Public License for more details.
 *
 * You should have received a copy of the GNU Library General Public License
 * aint with this library; see the file COPYING.LIB.  If not, write to
 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 * Boston, MA 02110-1301, USA.
 */

#include "config.h"

#if ENABLE(MEDIA_STREAM) && USE(GSTREAMER)
#include "MockDisplayCaptureSourceGStreamer.h"

namespace WebCore {

CaptureSourceOrError MockDisplayCaptureSourceGStreamer::create(const CaptureDevice& device, MediaDeviceHashSalts&& hashSalts, const MediaConstraints* constraints, std::optional<PageIdentifier> pageIdentifier)
{
    auto mockSource = adoptRef(*new MockRealtimeVideoSourceGStreamer(String { device.persistentId() }, AtomString { device.label() }, MediaDeviceHashSalts { hashSalts }, pageIdentifier));

    if (constraints) {
        if (auto error = mockSource->applyConstraints(*constraints))
            return CaptureSourceOrError(CaptureSourceError { error->invalidConstraint });
    }

    Ref<RealtimeMediaSource> source = adoptRef(*new MockDisplayCaptureSourceGStreamer(device, WTFMove(mockSource), WTFMove(hashSalts), pageIdentifier));
    return source;
}

MockDisplayCaptureSourceGStreamer::MockDisplayCaptureSourceGStreamer(const CaptureDevice& device, Ref<MockRealtimeVideoSourceGStreamer>&& source, MediaDeviceHashSalts&& hashSalts, std::optional<PageIdentifier> pageIdentifier)
    : RealtimeVideoCaptureSource(device, WTFMove(hashSalts), pageIdentifier)
    , m_source(WTFMove(source))
    , m_deviceType(device.type())
{
    m_source->addVideoFrameObserver(*this);
}

MockDisplayCaptureSourceGStreamer::~MockDisplayCaptureSourceGStreamer()
{
    m_source->removeVideoFrameObserver(*this);
}

void MockDisplayCaptureSourceGStreamer::stopProducingData()
{
    m_source->removeVideoFrameObserver(*this);
    m_source->stop();
}

void MockDisplayCaptureSourceGStreamer::requestToEnd(RealtimeMediaSourceObserver& callingObserver)
{
    RealtimeMediaSource::requestToEnd(callingObserver);
    m_source->removeVideoFrameObserver(*this);
    m_source->requestToEnd(callingObserver);
}

void MockDisplayCaptureSourceGStreamer::setMuted(bool isMuted)
{
    RealtimeMediaSource::setMuted(isMuted);
    m_source->setMuted(isMuted);
}

void MockDisplayCaptureSourceGStreamer::videoFrameAvailable(VideoFrame& videoFrame, VideoFrameTimeMetadata metadata)
{
    RealtimeMediaSource::videoFrameAvailable(videoFrame, metadata);
}

const RealtimeMediaSourceCapabilities& MockDisplayCaptureSourceGStreamer::capabilities()
{
    if (!m_capabilities) {
        RealtimeMediaSourceCapabilities capabilities(settings().supportedConstraints());

        // FIXME: what should these be?
        // Currently mimicking the values for SCREEN-1 in MockRealtimeMediaSourceCenter.cpp::defaultDevices()
        capabilities.setWidth({ 1, 1920 });
        capabilities.setHeight({ 1, 1080 });
        capabilities.setFrameRate({ .01, 30.0 });

        capabilities.setDeviceId(hashedId());

        m_capabilities = WTFMove(capabilities);
    }
    return m_capabilities.value();
}

const RealtimeMediaSourceSettings& MockDisplayCaptureSourceGStreamer::settings()
{
    if (!m_currentSettings) {
        RealtimeMediaSourceSettings settings;
        settings.setFrameRate(frameRate());

        m_source->ensureIntrinsicSizeMaintainsAspectRatio();
        auto size = m_source->size();
        settings.setWidth(size.width());
        settings.setHeight(size.height());
        settings.setDeviceId(hashedId());
        settings.setDisplaySurface(m_source->mockScreen() ? DisplaySurfaceType::Monitor : DisplaySurfaceType::Window);
        settings.setLogicalSurface(false);

        RealtimeMediaSourceSupportedConstraints supportedConstraints;
        supportedConstraints.setSupportsFrameRate(true);
        supportedConstraints.setSupportsWidth(true);
        supportedConstraints.setSupportsHeight(true);
        supportedConstraints.setSupportsDisplaySurface(true);
        supportedConstraints.setSupportsLogicalSurface(true);
        supportedConstraints.setSupportsDeviceId(true);

        settings.setSupportedConstraints(supportedConstraints);

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

} // namespace WebCore

#endif // ENABLE(MEDIA_STREAM) && USE(GSTREAMER)