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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.
*/
#pragma once
#if USE(LIBWEBRTC)
#include "LibWebRTCMacros.h"
#include "MediaStreamTrackPrivate.h"
#include "Timer.h"
#include <wtf/Lock.h>
WTF_IGNORE_WARNINGS_IN_THIRD_PARTY_CODE_BEGIN
#include <webrtc/api/media_stream_interface.h>
WTF_IGNORE_WARNINGS_IN_THIRD_PARTY_CODE_END
#include <wtf/LoggerHelper.h>
#include <wtf/ThreadSafeRefCounted.h>
namespace WebCore {
class RealtimeOutgoingVideoSource
: public ThreadSafeRefCounted<RealtimeOutgoingVideoSource, WTF::DestructionThread::Main>
, public webrtc::VideoTrackSourceInterface
, private MediaStreamTrackPrivateObserver
, private RealtimeMediaSource::VideoFrameObserver
#if !RELEASE_LOG_DISABLED
, private LoggerHelper
#endif
{
public:
static Ref<RealtimeOutgoingVideoSource> create(Ref<MediaStreamTrackPrivate>&& videoSource);
~RealtimeOutgoingVideoSource();
void start() { observeSource(); }
void stop();
void setSource(Ref<MediaStreamTrackPrivate>&&);
MediaStreamTrackPrivate& source() const { return m_videoSource.get(); }
void AddRef() const final { ref(); }
webrtc::RefCountReleaseStatus Release() const final
{
deref();
return webrtc::RefCountReleaseStatus::kOtherRefsRemained;
}
void applyRotation();
void disableVideoScaling() { m_enableVideoFrameScaling = false; }
protected:
explicit RealtimeOutgoingVideoSource(Ref<MediaStreamTrackPrivate>&&);
void sendFrame(rtc::scoped_refptr<webrtc::VideoFrameBuffer>&&);
bool isSilenced() const { return m_muted || !m_enabled; }
virtual rtc::scoped_refptr<webrtc::VideoFrameBuffer> createBlackFrame(size_t width, size_t height) = 0;
bool m_shouldApplyRotation { false };
webrtc::VideoRotation m_currentRotation { webrtc::kVideoRotation_0 };
#if !RELEASE_LOG_DISABLED
// LoggerHelper API
const Logger& logger() const final { return m_logger.get(); }
uint64_t logIdentifier() const final { return m_logIdentifier; }
ASCIILiteral logClassName() const final { return "RealtimeOutgoingVideoSource"_s; }
WTFLogChannel& logChannel() const final;
#endif
double videoFrameScaling() const { return m_enableVideoFrameScaling ? (double)m_videoFrameScaling : 1; }
private:
void sendBlackFramesIfNeeded();
void sendOneBlackFrame();
void initializeFromSource();
void updateFramesSending();
void observeSource();
void unobserveSource();
USING_CAN_MAKE_WEAKPTR(MediaStreamTrackPrivateObserver);
// Notifier API
void RegisterObserver(webrtc::ObserverInterface*) final { }
void UnregisterObserver(webrtc::ObserverInterface*) final { }
// VideoTrackSourceInterface API
bool is_screencast() const final { return false; }
std::optional<bool> needs_denoising() const final { return std::optional<bool>(); }
bool GetStats(Stats*) final { return false; };
bool SupportsEncodedOutput() const final { return false; }
void GenerateKeyFrame() final { }
void AddEncodedSink(rtc::VideoSinkInterface<webrtc::RecordableEncodedFrame>*) final { }
void RemoveEncodedSink(rtc::VideoSinkInterface<webrtc::RecordableEncodedFrame>*) final { }
// MediaSourceInterface API
SourceState state() const final { return SourceState(); }
bool remote() const final { return true; }
// rtc::VideoSourceInterface<webrtc::VideoFrame> API
void AddOrUpdateSink(rtc::VideoSinkInterface<webrtc::VideoFrame>*, const rtc::VideoSinkWants&) final;
void RemoveSink(rtc::VideoSinkInterface<webrtc::VideoFrame>*) final;
void sourceMutedChanged();
void sourceEnabledChanged();
void startObservingVideoFrames();
// MediaStreamTrackPrivateObserver API
void trackMutedChanged(MediaStreamTrackPrivate&) final { sourceMutedChanged(); }
void trackEnabledChanged(MediaStreamTrackPrivate&) final { sourceEnabledChanged(); }
void trackSettingsChanged(MediaStreamTrackPrivate&) final { initializeFromSource(); }
void trackEnded(MediaStreamTrackPrivate&) final { }
// RealtimeMediaSource::VideoFrameObserver API
void videoFrameAvailable(VideoFrame&, VideoFrameTimeMetadata) override { }
Ref<MediaStreamTrackPrivate> m_videoSource;
Timer m_blackFrameTimer;
rtc::scoped_refptr<webrtc::VideoFrameBuffer> m_blackFrame;
mutable Lock m_sinksLock;
UncheckedKeyHashSet<rtc::VideoSinkInterface<webrtc::VideoFrame>*> m_sinks WTF_GUARDED_BY_LOCK(m_sinksLock);
bool m_areSinksAskingToApplyRotation { false };
bool m_enabled { true };
bool m_muted { false };
uint32_t m_width { 0 };
uint32_t m_height { 0 };
std::optional<double> m_maxFrameRate;
std::optional<double> m_maxPixelCount;
std::atomic<double> m_videoFrameScaling { 1.0 };
bool m_enableVideoFrameScaling { true };
bool m_isObservingVideoFrames { false };
#if !RELEASE_LOG_DISABLED
Ref<const Logger> m_logger;
const uint64_t m_logIdentifier;
MonotonicTime m_lastFrameLogTime;
unsigned m_frameCount { 0 };
#endif
};
} // namespace WebCore
#endif // USE(LIBWEBRTC)
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