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/*
* Copyright (C) 2017-2019 Apple Inc.
*
* 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.
* 3. Neither the name of Apple Inc. 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 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
* 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 "RealtimeOutgoingVideoSource.h"
#if USE(LIBWEBRTC)
#include "Logging.h"
ALLOW_UNUSED_PARAMETERS_BEGIN
#include <webrtc/api/video/i420_buffer.h>
#include <webrtc/common_video/libyuv/include/webrtc_libyuv.h>
ALLOW_UNUSED_PARAMETERS_END
#include <wtf/MainThread.h>
namespace WebCore {
RealtimeOutgoingVideoSource::RealtimeOutgoingVideoSource(Ref<MediaStreamTrackPrivate>&& videoSource)
: m_videoSource(WTFMove(videoSource))
, m_blackFrameTimer(*this, &RealtimeOutgoingVideoSource::sendOneBlackFrame)
#if !RELEASE_LOG_DISABLED
, m_logger(m_videoSource->logger())
, m_logIdentifier(m_videoSource->logIdentifier())
#endif
{
}
RealtimeOutgoingVideoSource::~RealtimeOutgoingVideoSource()
{
ASSERT(m_sinks.isEmpty());
stop();
}
void RealtimeOutgoingVideoSource::observeSource()
{
m_videoSource->addObserver(*this);
initializeFromSource();
}
void RealtimeOutgoingVideoSource::unobserveSource()
{
m_videoSource->removeObserver(*this);
}
bool RealtimeOutgoingVideoSource::setSource(Ref<MediaStreamTrackPrivate>&& newSource)
{
if (!m_initialSettings)
m_initialSettings = m_videoSource->source().settings();
auto locker = holdLock(m_sinksLock);
bool hasSinks = !m_sinks.isEmpty();
if (hasSinks)
unobserveSource();
m_videoSource = WTFMove(newSource);
if (hasSinks)
observeSource();
return true;
}
void RealtimeOutgoingVideoSource::stop()
{
ASSERT(isMainThread());
unobserveSource();
m_blackFrameTimer.stop();
}
void RealtimeOutgoingVideoSource::updateBlackFramesSending()
{
if (!m_muted && m_enabled) {
if (m_blackFrameTimer.isActive())
m_blackFrameTimer.stop();
return;
}
sendBlackFramesIfNeeded();
}
void RealtimeOutgoingVideoSource::sourceMutedChanged()
{
ASSERT(m_muted != m_videoSource->muted());
m_muted = m_videoSource->muted();
updateBlackFramesSending();
}
void RealtimeOutgoingVideoSource::sourceEnabledChanged()
{
ASSERT(m_enabled != m_videoSource->enabled());
m_enabled = m_videoSource->enabled();
updateBlackFramesSending();
}
void RealtimeOutgoingVideoSource::initializeFromSource()
{
const auto& settings = m_videoSource->source().settings();
m_width = settings.width();
m_height = settings.height();
m_muted = m_videoSource->muted();
m_enabled = m_videoSource->enabled();
updateBlackFramesSending();
}
void RealtimeOutgoingVideoSource::AddOrUpdateSink(rtc::VideoSinkInterface<webrtc::VideoFrame>* sink, const rtc::VideoSinkWants& sinkWants)
{
ASSERT(!sinkWants.black_frames);
if (sinkWants.rotation_applied)
m_shouldApplyRotation = true;
{
auto locker = holdLock(m_sinksLock);
if (!m_sinks.add(sink) || m_sinks.size() != 1)
return;
}
callOnMainThread([protectedThis = makeRef(*this)]() {
protectedThis->observeSource();
});
}
void RealtimeOutgoingVideoSource::RemoveSink(rtc::VideoSinkInterface<webrtc::VideoFrame>* sink)
{
{
auto locker = holdLock(m_sinksLock);
if (!m_sinks.remove(sink) || m_sinks.size())
return;
}
unobserveSource();
callOnMainThread([protectedThis = makeRef(*this)]() {
if (protectedThis->m_blackFrameTimer.isActive())
protectedThis->m_blackFrameTimer.stop();
});
}
void RealtimeOutgoingVideoSource::sendBlackFramesIfNeeded()
{
if (m_blackFrameTimer.isActive())
return;
if (!m_muted && m_enabled)
return;
if (!m_width || !m_height)
return;
if (!m_blackFrame) {
auto width = m_width;
auto height = m_height;
if (m_shouldApplyRotation && (m_currentRotation == webrtc::kVideoRotation_0 || m_currentRotation == webrtc::kVideoRotation_90))
std::swap(width, height);
m_blackFrame = createBlackFrame(width, height);
ASSERT(m_blackFrame);
if (!m_blackFrame) {
ALWAYS_LOG(LOGIDENTIFIER, "Unable to send black frames");
return;
}
}
sendOneBlackFrame();
m_blackFrameTimer.startRepeating(1_s);
}
void RealtimeOutgoingVideoSource::sendOneBlackFrame()
{
ALWAYS_LOG(LOGIDENTIFIER);
sendFrame(rtc::scoped_refptr<webrtc::VideoFrameBuffer>(m_blackFrame));
}
void RealtimeOutgoingVideoSource::sendFrame(rtc::scoped_refptr<webrtc::VideoFrameBuffer>&& buffer)
{
MonotonicTime timestamp = MonotonicTime::now();
webrtc::VideoFrame frame(buffer, m_shouldApplyRotation ? webrtc::kVideoRotation_0 : m_currentRotation, static_cast<int64_t>(timestamp.secondsSinceEpoch().microseconds()));
#if !RELEASE_LOG_DISABLED
++m_frameCount;
auto delta = timestamp - m_lastFrameLogTime;
if (!m_lastFrameLogTime || delta >= 1_s) {
if (m_lastFrameLogTime) {
INFO_LOG(LOGIDENTIFIER, m_frameCount, " frames sent in ", delta.value(), " seconds");
m_frameCount = 0;
}
m_lastFrameLogTime = timestamp;
}
#endif
auto locker = holdLock(m_sinksLock);
for (auto* sink : m_sinks)
sink->OnFrame(frame);
}
#if !RELEASE_LOG_DISABLED
WTFLogChannel& RealtimeOutgoingVideoSource::logChannel() const
{
return LogWebRTC;
}
#endif
} // namespace WebCore
#endif // USE(LIBWEBRTC)