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/*
* Copyright (C) 2024 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 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. OR 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 ENABLE(MEDIA_RECORDER)
#include "CAAudioStreamDescription.h"
#include "MediaRecorderPrivateWriter.h"
#include "SharedBuffer.h"
#include "VideoEncoder.h"
#include <atomic>
#include <span>
#include <wtf/Deque.h>
#include <wtf/Forward.h>
#include <wtf/MediaTime.h>
#include <wtf/MonotonicTime.h>
#include <wtf/NativePromise.h>
#include <wtf/ThreadSafeWeakPtr.h>
#include <wtf/WorkQueue.h>
typedef const struct opaqueCMFormatDescription* CMFormatDescriptionRef;
typedef struct opaqueCMBufferQueueTriggerToken *CMBufferQueueTriggerToken;
namespace WebCore {
class AudioSampleBufferConverter;
class InProcessCARingBuffer;
class FragmentedSharedBuffer;
struct MediaRecorderPrivateOptions;
class MediaSample;
class PlatformAudioData;
class VideoFrame;
struct AudioInfo;
struct VideoInfo;
class MediaRecorderPrivateEncoder final : public ThreadSafeRefCountedAndCanMakeThreadSafeWeakPtr<MediaRecorderPrivateEncoder, WTF::DestructionThread::Main> {
public:
static RefPtr<MediaRecorderPrivateEncoder> create(bool hasAudio, bool hasVideo, const MediaRecorderPrivateOptions&);
~MediaRecorderPrivateEncoder();
void appendVideoFrame(VideoFrame&);
void appendAudioSampleBuffer(const PlatformAudioData&, const AudioStreamDescription&, const WTF::MediaTime&, size_t);
void fetchData(CompletionHandler<void(RefPtr<FragmentedSharedBuffer>&&, double)>&&);
void pause();
void resume();
void stopRecording();
void close();
String mimeType() const;
unsigned audioBitRate() const;
unsigned videoBitRate() const;
bool hasAudio() const { return m_hasAudio; }
bool hasVideo() const { return m_hasVideo; }
private:
MediaRecorderPrivateEncoder(bool hasAudio, bool hasVideo);
bool initialize(const MediaRecorderPrivateOptions&, UniqueRef<MediaRecorderPrivateWriter>&&);
static WorkQueue& queueSingleton();
Ref<MediaRecorderPrivateWriterListener> listener();
class Listener;
friend class Listener;
void appendData(std::span<const uint8_t>);
MediaTime lastEnqueuedAudioTime() const { return MediaTime(m_lastEnqueuedAudioTimeUs.load(), 1000000); }
MediaTime currentTime() const;
MediaTime currentEndTime() const;
void flushDataBuffer();
static void compressedAudioOutputBufferCallback(void*, CMBufferQueueTriggerToken);
Ref<FragmentedSharedBuffer> takeData();
MediaTime lastMuxedSampleTime() const;
void generateMIMEType();
void audioSamplesDescriptionChanged(const AudioStreamBasicDescription&);
void audioSamplesAvailable(const MediaTime&, size_t, size_t);
RefPtr<AudioSampleBufferConverter> audioConverter() const;
void enqueueCompressedAudioSampleBuffers();
void appendVideoFrame(MediaTime, Ref<VideoFrame>&&);
Ref<GenericPromise> encodePendingVideoFrames();
void processVideoEncoderActiveConfiguration(const VideoEncoder::Config&, const VideoEncoderActiveConfiguration&);
void enqueueCompressedVideoFrame(VideoEncoder::EncodedFrame&&);
Ref<GenericPromise> flushPendingData(const MediaTime&);
void partiallyFlushEncodedQueues();
Ref<GenericPromise> waitForMatchingAudio(const MediaTime&);
using Result = MediaRecorderPrivateWriter::Result;
MediaTime flushToEndSegment(const MediaTime&);
void flushAllEncodedQueues();
void interleaveAndEnqueueNextFrame();
void maybeStartWriter();
bool hasMuxedDataSinceEndSegment() const;
void addRingBuffer(const AudioStreamDescription&);
void writeDataToRingBuffer(AudioBufferList*, size_t, size_t);
void updateCurrentRingBufferIfNeeded();
std::atomic<bool> m_isStopped { false };
bool m_writerIsStarted WTF_GUARDED_BY_CAPABILITY(queueSingleton()) { false };
bool m_writerIsClosed WTF_GUARDED_BY_CAPABILITY(queueSingleton()) { false };
MediaTime m_lastMuxedSampleStartTime WTF_GUARDED_BY_CAPABILITY(queueSingleton());
bool m_lastMuxedSampleIsVideo WTF_GUARDED_BY_CAPABILITY(queueSingleton()) { false };
MediaTime m_lastMuxedAudioSampleEndTime WTF_GUARDED_BY_CAPABILITY(queueSingleton());
bool m_hasMuxedAudioFrameSinceEndSegment WTF_GUARDED_BY_CAPABILITY(queueSingleton()) { false };
bool m_hasMuxedVideoFrameSinceEndSegment WTF_GUARDED_BY_CAPABILITY(queueSingleton()) { false };
bool m_nextVideoFrameMuxedShouldBeKeyframe WTF_GUARDED_BY_CAPABILITY(queueSingleton()) { true };
size_t m_pendingFlush WTF_GUARDED_BY_CAPABILITY(queueSingleton()) { 0 };
Ref<GenericPromise> m_currentFlushOperations WTF_GUARDED_BY_CAPABILITY(mainThread) { GenericPromise::createAndResolve() };
String m_mimeType WTF_GUARDED_BY_CAPABILITY(mainThread);
FourCharCode m_audioCodec { 0 }; // set on creation. const after
String m_audioCodecMimeType WTF_GUARDED_BY_CAPABILITY(mainThread);
std::optional<uint8_t> m_audioTrackIndex WTF_GUARDED_BY_CAPABILITY(queueSingleton());
RetainPtr<CMFormatDescriptionRef> m_audioFormatDescription WTF_GUARDED_BY_CAPABILITY(queueSingleton());
RefPtr<AudioInfo> m_audioCompressedAudioInfo WTF_GUARDED_BY_CAPABILITY(queueSingleton());
RefPtr<AudioSampleBufferConverter> m_audioConverter WTF_GUARDED_BY_CAPABILITY(queueSingleton());
bool m_formatChangedOccurred WTF_GUARDED_BY_CAPABILITY(queueSingleton()) { false };
std::optional<AudioStreamBasicDescription> m_originalOutputDescription WTF_GUARDED_BY_CAPABILITY(queueSingleton());
Deque<UniqueRef<MediaSamplesBlock>> m_encodedAudioFrames WTF_GUARDED_BY_CAPABILITY(queueSingleton());
std::optional<std::pair<const MediaTime, GenericPromise::Producer>> m_pendingAudioFramePromise WTF_GUARDED_BY_CAPABILITY(queueSingleton());
Lock m_ringBuffersLock;
Deque<std::unique_ptr<InProcessCARingBuffer>> m_ringBuffers WTF_GUARDED_BY_LOCK(m_ringBuffersLock);
InProcessCARingBuffer* m_currentRingBuffer WTF_GUARDED_BY_CAPABILITY(queueSingleton()) { nullptr };
std::atomic<int64_t> m_lastEnqueuedAudioTimeUs { 0 };
std::atomic<int64_t> m_currentAudioTimeUs { 0 };
// Audio thread variables.
std::optional<CAAudioStreamDescription> m_currentStreamDescription;
MediaTime m_currentAudioTime { MediaTime::zeroTime() };
uint64_t m_currentAudioSampleCount { 0 };
FourCharCode m_videoCodec { 0 }; // set on creation. const after
String m_videoCodecMimeType WTF_GUARDED_BY_CAPABILITY(mainThread);
std::optional<uint8_t> m_videoTrackIndex WTF_GUARDED_BY_CAPABILITY(queueSingleton());
RefPtr<VideoInfo> m_videoTrackInfo WTF_GUARDED_BY_CAPABILITY(queueSingleton());
RetainPtr<CMFormatDescriptionRef> m_videoFormatDescription WTF_GUARDED_BY_CAPABILITY(queueSingleton());
RefPtr<VideoEncoder> m_videoEncoder WTF_GUARDED_BY_CAPABILITY(queueSingleton());
Deque<std::pair<Ref<VideoFrame>, MediaTime>> m_pendingVideoFrames WTF_GUARDED_BY_CAPABILITY(queueSingleton());
Deque<UniqueRef<MediaSamplesBlock>> m_encodedVideoFrames WTF_GUARDED_BY_CAPABILITY(queueSingleton());
Deque<UniqueRef<MediaSamplesBlock>> m_interleavedFrames WTF_GUARDED_BY_CAPABILITY(queueSingleton());
bool m_firstVideoFrameProcessed WTF_GUARDED_BY_CAPABILITY(queueSingleton()) { false };
std::optional<MonotonicTime> m_currentVideoSegmentStartTime WTF_GUARDED_BY_CAPABILITY(queueSingleton());
uint64_t m_previousSegmentVideoDurationUs WTF_GUARDED_BY_CAPABILITY(queueSingleton()) { 0 };
MediaTime m_lastRawVideoFrameReceived WTF_GUARDED_BY_CAPABILITY(queueSingleton()) { MediaTime::negativeInfiniteTime() };
MediaTime m_lastEnqueuedRawVideoFrame WTF_GUARDED_BY_CAPABILITY(queueSingleton()) { MediaTime::negativeInfiniteTime() };
MediaTime m_lastVideoKeyframeTime WTF_GUARDED_BY_CAPABILITY(queueSingleton());
std::optional<CGAffineTransform> m_videoTransform;
RefPtr<GenericNonExclusivePromise> m_videoEncoderCreationPromise;
Lock m_lock;
SharedBufferBuilder m_data WTF_GUARDED_BY_LOCK(m_lock);
static constexpr size_t s_dataBufferSize { 1024 };
Vector<uint8_t> m_dataBuffer WTF_GUARDED_BY_LOCK(m_lock);
double m_timeCode WTF_GUARDED_BY_CAPABILITY(queueSingleton()) { 0 };
uint64_t m_audioBitsPerSecond { 0 }; // set on creation. const after
uint64_t m_videoBitsPerSecond { 0 }; // set on creation. const after
bool m_hadError WTF_GUARDED_BY_CAPABILITY(queueSingleton()) { false };
bool m_isPaused WTF_GUARDED_BY_CAPABILITY(queueSingleton()) { false };
bool m_hasStartedAudibleAudioFrame WTF_GUARDED_BY_CAPABILITY(queueSingleton()) { false };
bool m_needKeyFrame WTF_GUARDED_BY_CAPABILITY(queueSingleton()) { true };
MediaTime m_startSegmentTime WTF_GUARDED_BY_CAPABILITY(queueSingleton()) { MediaTime::zeroTime() };
const MediaTime m_minimumSegmentDuration { MediaTime::createWithDouble(1) };
const MediaTime m_maxGOPDuration { MediaTime::createWithDouble(2) };
const bool m_hasAudio { false };
const bool m_hasVideo { false };
const Ref<Listener> m_listener;
std::unique_ptr<MediaRecorderPrivateWriter> m_writer; // Always set and immutable once initialize() has been called
};
} // namespace WebCore
#endif // ENABLE(MEDIA_RECORDER)
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