Source/WebCore/platform/mediastream/gstreamer/RealtimeOutgoingVideoSourceLibWebRTC.cpp

/*
 * Copyright (C) 2017 Igalia S.L. All rights reserved.
 * Copyright (C) 2017 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 required to be 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. AND ITS 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 APPLE INC. AND ITS CONTRIBUTORS BE LIABLE FOR
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 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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#include "config.h"

#if USE(LIBWEBRTC) && USE(GSTREAMER)
#include "RealtimeOutgoingVideoSourceLibWebRTC.h"

#include "GStreamerVideoFrameLibWebRTC.h"
#include "MediaSampleGStreamer.h"

namespace WebCore {

Ref<RealtimeOutgoingVideoSource> RealtimeOutgoingVideoSource::create(Ref<MediaStreamTrackPrivate>&& videoSource)
{
    return RealtimeOutgoingVideoSourceLibWebRTC::create(WTFMove(videoSource));
}

Ref<RealtimeOutgoingVideoSourceLibWebRTC> RealtimeOutgoingVideoSourceLibWebRTC::create(Ref<MediaStreamTrackPrivate>&& videoSource)
{
    return adoptRef(*new RealtimeOutgoingVideoSourceLibWebRTC(WTFMove(videoSource)));
}

RealtimeOutgoingVideoSourceLibWebRTC::RealtimeOutgoingVideoSourceLibWebRTC(Ref<MediaStreamTrackPrivate>&& videoSource)
    : RealtimeOutgoingVideoSource(WTFMove(videoSource))
{
}

void RealtimeOutgoingVideoSourceLibWebRTC::sampleBufferUpdated(MediaStreamTrackPrivate&, MediaSample& sample)
{
    if (isSilenced())
        return;

    switch (sample.videoRotation()) {
    case MediaSample::VideoRotation::None:
        m_currentRotation = webrtc::kVideoRotation_0;
        break;
    case MediaSample::VideoRotation::UpsideDown:
        m_currentRotation = webrtc::kVideoRotation_180;
        break;
    case MediaSample::VideoRotation::Right:
        m_currentRotation = webrtc::kVideoRotation_90;
        break;
    case MediaSample::VideoRotation::Left:
        m_currentRotation = webrtc::kVideoRotation_270;
        break;
    }

    ASSERT(sample.platformSample().type == PlatformSample::GStreamerSampleType);
    auto& mediaSample = static_cast<MediaSampleGStreamer&>(sample);
    auto frameBuffer(GStreamerVideoFrameLibWebRTC::create(gst_sample_ref(mediaSample.platformSample().sample.gstSample)));

    sendFrame(WTFMove(frameBuffer));
}

rtc::scoped_refptr<webrtc::VideoFrameBuffer> RealtimeOutgoingVideoSourceLibWebRTC::createBlackFrame(size_t  width, size_t  height)
{
    GstVideoInfo info;

    gst_video_info_set_format(&info, GST_VIDEO_FORMAT_RGB, width, height);

    GRefPtr<GstBuffer> buffer = adoptGRef(gst_buffer_new_allocate(nullptr, info.size, nullptr));
    GRefPtr<GstCaps> caps = adoptGRef(gst_video_info_to_caps(&info));

    auto map = GstMappedBuffer::create(buffer.get(), GST_MAP_WRITE);
    memset(map->data(), 0, info.size);

    return GStreamerVideoFrameLibWebRTC::create(gst_sample_new(buffer.get(), caps.get(), NULL, NULL));
}

} // namespace WebCore

#endif // USE(LIBWEBRTC)