tdesktop/Telegram/SourceFiles/media/media_clip_ffmpeg.cpp

524 lines
18 KiB
C++

/*
This file is part of Telegram Desktop,
the official desktop version of Telegram messaging app, see https://telegram.org
Telegram Desktop is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
It 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 General Public License for more details.
In addition, as a special exception, the copyright holders give permission
to link the code of portions of this program with the OpenSSL library.
Full license: https://github.com/telegramdesktop/tdesktop/blob/master/LICENSE
Copyright (c) 2014-2016 John Preston, https://desktop.telegram.org
*/
#include "stdafx.h"
#include "media/media_clip_ffmpeg.h"
#include "media/media_audio.h"
#include "media/media_child_ffmpeg_loader.h"
namespace Media {
namespace Clip {
namespace internal {
FFMpegReaderImplementation::FFMpegReaderImplementation(FileLocation *location, QByteArray *data, uint64 playId) : ReaderImplementation(location, data)
, _playId(playId) {
_frame = av_frame_alloc();
av_init_packet(&_packetNull);
_packetNull.data = nullptr;
_packetNull.size = 0;
}
ReaderImplementation::ReadResult FFMpegReaderImplementation::readNextFrame() {
if (_frameRead) {
av_frame_unref(_frame);
_frameRead = false;
}
do {
int res = avcodec_receive_frame(_codecContext, _frame);
if (res >= 0) {
processReadFrame();
return ReadResult::Success;
}
if (res == AVERROR_EOF) {
clearPacketQueue();
if (_mode == Mode::Normal) {
return ReadResult::EndOfFile;
}
if ((res = avformat_seek_file(_fmtContext, _streamId, std::numeric_limits<int64_t>::min(), 0, std::numeric_limits<int64_t>::max(), 0)) < 0) {
if ((res = av_seek_frame(_fmtContext, _streamId, 0, AVSEEK_FLAG_BYTE)) < 0) {
if ((res = av_seek_frame(_fmtContext, _streamId, 0, AVSEEK_FLAG_FRAME)) < 0) {
if ((res = av_seek_frame(_fmtContext, _streamId, 0, 0)) < 0) {
char err[AV_ERROR_MAX_STRING_SIZE] = { 0 };
LOG(("Gif Error: Unable to av_seek_frame() to the start %1, error %2, %3").arg(logData()).arg(res).arg(av_make_error_string(err, sizeof(err), res)));
return ReadResult::Error;
}
}
}
}
avcodec_flush_buffers(_codecContext);
_hadFrame = false;
_frameMs = 0;
_lastReadVideoMs = _lastReadAudioMs = 0;
continue;
} else if (res != AVERROR(EAGAIN)) {
char err[AV_ERROR_MAX_STRING_SIZE] = { 0 };
LOG(("Audio Error: Unable to avcodec_receive_frame() %1, error %2, %3").arg(logData()).arg(res).arg(av_make_error_string(err, sizeof(err), res)));
return ReadResult::Error;
}
while (_packetQueue.isEmpty()) {
auto packetResult = readAndProcessPacket();
if (packetResult == PacketResult::Error) {
return ReadResult::Error;
} else if (packetResult == PacketResult::EndOfFile) {
break;
}
}
if (_packetQueue.isEmpty()) {
avcodec_send_packet(_codecContext, nullptr); // drain
continue;
}
startPacket();
AVPacket packet;
FFMpeg::packetFromDataWrap(packet, _packetQueue.head());
res = avcodec_send_packet(_codecContext, &packet);
if (res < 0) {
finishPacket();
char err[AV_ERROR_MAX_STRING_SIZE] = { 0 };
LOG(("Audio Error: Unable to avcodec_send_packet() %1, error %2, %3").arg(logData()).arg(res).arg(av_make_error_string(err, sizeof(err), res)));
if (res == AVERROR_INVALIDDATA) {
continue; // try to skip bad packet
}
return ReadResult::Error;
}
finishPacket();
} while (true);
return ReadResult::Error;
}
void FFMpegReaderImplementation::processReadFrame() {
int64 duration = av_frame_get_pkt_duration(_frame);
int64 framePts = (_frame->pkt_pts == AV_NOPTS_VALUE) ? _frame->pkt_dts : _frame->pkt_pts;
int64 frameMs = (framePts * 1000LL * _fmtContext->streams[_streamId]->time_base.num) / _fmtContext->streams[_streamId]->time_base.den;
_currentFrameDelay = _nextFrameDelay;
if (_frameMs + _currentFrameDelay < frameMs) {
_currentFrameDelay = int32(frameMs - _frameMs);
} else if (frameMs < _frameMs + _currentFrameDelay) {
frameMs = _frameMs + _currentFrameDelay;
}
if (duration == AV_NOPTS_VALUE) {
_nextFrameDelay = 0;
} else {
_nextFrameDelay = (duration * 1000LL * _fmtContext->streams[_streamId]->time_base.num) / _fmtContext->streams[_streamId]->time_base.den;
}
_frameMs = frameMs;
_hadFrame = _frameRead = true;
_frameTime += _currentFrameDelay;
}
ReaderImplementation::ReadResult FFMpegReaderImplementation::readFramesTill(int64 frameMs, uint64 systemMs) {
if (_audioStreamId < 0) { // just keep up
if (_frameRead && _frameTime > frameMs) {
return ReadResult::Success;
}
auto readResult = readNextFrame();
if (readResult != ReadResult::Success || _frameTime > frameMs) {
return readResult;
}
readResult = readNextFrame();
if (_frameTime <= frameMs) {
_frameTime = frameMs + 5; // keep up
}
return readResult;
}
// sync by audio stream
auto correctMs = (frameMs >= 0) ? audioPlayer()->getVideoCorrectedTime(_playId, frameMs, systemMs) : frameMs;
if (!_frameRead) {
auto readResult = readNextFrame();
if (readResult != ReadResult::Success) {
return readResult;
}
}
while (_frameTime <= correctMs) {
auto readResult = readNextFrame();
if (readResult != ReadResult::Success) {
return readResult;
}
}
if (frameMs >= 0) {
_frameTimeCorrection = frameMs - correctMs;
}
return ReadResult::Success;
}
int64 FFMpegReaderImplementation::frameRealTime() const {
return _frameMs;
}
uint64 FFMpegReaderImplementation::framePresentationTime() const {
return static_cast<uint64>(qMax(_frameTime + _frameTimeCorrection, 0LL));
}
int64 FFMpegReaderImplementation::durationMs() const {
if (_fmtContext->streams[_streamId]->duration == AV_NOPTS_VALUE) return 0;
return (_fmtContext->streams[_streamId]->duration * 1000LL * _fmtContext->streams[_streamId]->time_base.num) / _fmtContext->streams[_streamId]->time_base.den;
}
void FFMpegReaderImplementation::pauseAudio() {
if (_audioStreamId >= 0) {
audioPlayer()->pauseFromVideo(_playId);
}
}
void FFMpegReaderImplementation::resumeAudio() {
if (_audioStreamId >= 0) {
audioPlayer()->resumeFromVideo(_playId);
}
}
bool FFMpegReaderImplementation::renderFrame(QImage &to, bool &hasAlpha, const QSize &size) {
t_assert(_frameRead);
_frameRead = false;
if (!_width || !_height) {
_width = _frame->width;
_height = _frame->height;
if (!_width || !_height) {
LOG(("Gif Error: Bad frame size %1").arg(logData()));
return false;
}
}
QSize toSize(size.isEmpty() ? QSize(_width, _height) : size);
if (to.isNull() || to.size() != toSize) {
to = QImage(toSize, QImage::Format_ARGB32);
}
hasAlpha = (_frame->format == AV_PIX_FMT_BGRA || (_frame->format == -1 && _codecContext->pix_fmt == AV_PIX_FMT_BGRA));
if (_frame->width == toSize.width() && _frame->height == toSize.height() && hasAlpha) {
int32 sbpl = _frame->linesize[0], dbpl = to.bytesPerLine(), bpl = qMin(sbpl, dbpl);
uchar *s = _frame->data[0], *d = to.bits();
for (int32 i = 0, l = _frame->height; i < l; ++i) {
memcpy(d + i * dbpl, s + i * sbpl, bpl);
}
} else {
if ((_swsSize != toSize) || (_frame->format != -1 && _frame->format != _codecContext->pix_fmt) || !_swsContext) {
_swsSize = toSize;
_swsContext = sws_getCachedContext(_swsContext, _frame->width, _frame->height, AVPixelFormat(_frame->format), toSize.width(), toSize.height(), AV_PIX_FMT_BGRA, 0, 0, 0, 0);
}
uint8_t * toData[1] = { to.bits() };
int toLinesize[1] = { to.bytesPerLine() }, res;
if ((res = sws_scale(_swsContext, _frame->data, _frame->linesize, 0, _frame->height, toData, toLinesize)) != _swsSize.height()) {
LOG(("Gif Error: Unable to sws_scale to good size %1, height %2, should be %3").arg(logData()).arg(res).arg(_swsSize.height()));
return false;
}
}
// Read some future packets for audio stream.
if (_audioStreamId >= 0) {
while (_frameMs + 5000 > _lastReadAudioMs
&& _frameMs + 15000 > _lastReadVideoMs) {
auto packetResult = readAndProcessPacket();
if (packetResult != PacketResult::Ok) {
break;
}
}
}
av_frame_unref(_frame);
return true;
}
bool FFMpegReaderImplementation::start(Mode mode, int64 &positionMs) {
_mode = mode;
initDevice();
if (!_device->open(QIODevice::ReadOnly)) {
LOG(("Gif Error: Unable to open device %1").arg(logData()));
return false;
}
_ioBuffer = (uchar*)av_malloc(AVBlockSize);
_ioContext = avio_alloc_context(_ioBuffer, AVBlockSize, 0, static_cast<void*>(this), &FFMpegReaderImplementation::_read, 0, &FFMpegReaderImplementation::_seek);
_fmtContext = avformat_alloc_context();
if (!_fmtContext) {
LOG(("Gif Error: Unable to avformat_alloc_context %1").arg(logData()));
return false;
}
_fmtContext->pb = _ioContext;
int res = 0;
char err[AV_ERROR_MAX_STRING_SIZE] = { 0 };
if ((res = avformat_open_input(&_fmtContext, 0, 0, 0)) < 0) {
_ioBuffer = 0;
LOG(("Gif Error: Unable to avformat_open_input %1, error %2, %3").arg(logData()).arg(res).arg(av_make_error_string(err, sizeof(err), res)));
return false;
}
_opened = true;
if ((res = avformat_find_stream_info(_fmtContext, 0)) < 0) {
LOG(("Gif Error: Unable to avformat_find_stream_info %1, error %2, %3").arg(logData()).arg(res).arg(av_make_error_string(err, sizeof(err), res)));
return false;
}
_streamId = av_find_best_stream(_fmtContext, AVMEDIA_TYPE_VIDEO, -1, -1, 0, 0);
if (_streamId < 0) {
LOG(("Gif Error: Unable to av_find_best_stream %1, error %2, %3").arg(logData()).arg(_streamId).arg(av_make_error_string(err, sizeof(err), _streamId)));
return false;
}
_packetNull.stream_index = _streamId;
_codecContext = avcodec_alloc_context3(nullptr);
if (!_codecContext) {
LOG(("Audio Error: Unable to avcodec_alloc_context3 %1").arg(logData()));
return false;
}
if ((res = avcodec_parameters_to_context(_codecContext, _fmtContext->streams[_streamId]->codecpar)) < 0) {
LOG(("Audio Error: Unable to avcodec_parameters_to_context %1, error %2, %3").arg(logData()).arg(res).arg(av_make_error_string(err, sizeof(err), res)));
return false;
}
av_codec_set_pkt_timebase(_codecContext, _fmtContext->streams[_streamId]->time_base);
av_opt_set_int(_codecContext, "refcounted_frames", 1, 0);
_codec = avcodec_find_decoder(_codecContext->codec_id);
_audioStreamId = av_find_best_stream(_fmtContext, AVMEDIA_TYPE_AUDIO, -1, -1, 0, 0);
if (_mode == Mode::OnlyGifv) {
if (_audioStreamId >= 0) { // should be no audio stream
_audioStreamId = -1; // do not attempt to access audioPlayer()
return false;
}
if (dataSize() > AnimationInMemory) {
return false;
}
if (_codecContext->codec_id != AV_CODEC_ID_H264) {
return false;
}
} else if (_mode == Mode::Silent || !audioPlayer() || !_playId) {
_audioStreamId = -1;
}
if ((res = avcodec_open2(_codecContext, _codec, 0)) < 0) {
LOG(("Gif Error: Unable to avcodec_open2 %1, error %2, %3").arg(logData()).arg(res).arg(av_make_error_string(err, sizeof(err), res)));
return false;
}
std_::unique_ptr<VideoSoundData> soundData;
if (_audioStreamId >= 0) {
AVCodecContext *audioContext = avcodec_alloc_context3(nullptr);
if (!audioContext) {
LOG(("Audio Error: Unable to avcodec_alloc_context3 %1").arg(logData()));
return false;
}
if ((res = avcodec_parameters_to_context(audioContext, _fmtContext->streams[_audioStreamId]->codecpar)) < 0) {
LOG(("Audio Error: Unable to avcodec_parameters_to_context %1, error %2, %3").arg(logData()).arg(res).arg(av_make_error_string(err, sizeof(err), res)));
return false;
}
av_codec_set_pkt_timebase(audioContext, _fmtContext->streams[_audioStreamId]->time_base);
av_opt_set_int(audioContext, "refcounted_frames", 1, 0);
auto audioCodec = avcodec_find_decoder(audioContext->codec_id);
if ((res = avcodec_open2(audioContext, audioCodec, 0)) < 0) {
avcodec_free_context(&audioContext);
LOG(("Gif Error: Unable to avcodec_open2 %1, error %2, %3").arg(logData()).arg(res).arg(av_make_error_string(err, sizeof(err), res)));
_audioStreamId = -1;
} else {
soundData = std_::make_unique<VideoSoundData>();
soundData->context = audioContext;
soundData->frequency = _fmtContext->streams[_audioStreamId]->codecpar->sample_rate;
if (_fmtContext->streams[_audioStreamId]->duration == AV_NOPTS_VALUE) {
soundData->length = (_fmtContext->duration * soundData->frequency) / AV_TIME_BASE;
} else {
soundData->length = (_fmtContext->streams[_audioStreamId]->duration * soundData->frequency * _fmtContext->streams[_audioStreamId]->time_base.num) / _fmtContext->streams[_audioStreamId]->time_base.den;
}
}
}
if (positionMs > 0) {
int64 ts = (positionMs * _fmtContext->streams[_streamId]->time_base.den) / (1000LL * _fmtContext->streams[_streamId]->time_base.num);
if (av_seek_frame(_fmtContext, _streamId, ts, 0) < 0) {
if (av_seek_frame(_fmtContext, _streamId, ts, AVSEEK_FLAG_BACKWARD) < 0) {
return false;
}
}
}
AVPacket packet;
auto readResult = readPacket(&packet);
if (readResult == PacketResult::Ok && positionMs > 0) {
positionMs = countPacketMs(&packet);
}
if (_audioStreamId >= 0) {
int64 position = (positionMs * soundData->frequency) / 1000LL;
audioPlayer()->initFromVideo(_playId, std_::move(soundData), position);
}
if (readResult == PacketResult::Ok) {
processPacket(&packet);
}
return true;
}
QString FFMpegReaderImplementation::logData() const {
return qsl("for file '%1', data size '%2'").arg(_location ? _location->name() : QString()).arg(_data->size());
}
FFMpegReaderImplementation::~FFMpegReaderImplementation() {
if (_audioStreamId >= 0) {
audioPlayer()->stopFromVideo(_playId);
}
clearPacketQueue();
if (_frameRead) {
av_frame_unref(_frame);
_frameRead = false;
}
if (_codecContext) avcodec_free_context(&_codecContext);
if (_swsContext) sws_freeContext(_swsContext);
if (_opened) {
avformat_close_input(&_fmtContext);
}
if (_ioContext) {
av_free(_ioContext->buffer);
av_free(_ioContext);
} else if (_ioBuffer) {
av_free(_ioBuffer);
}
if (_fmtContext) avformat_free_context(_fmtContext);
av_frame_free(&_frame);
}
FFMpegReaderImplementation::PacketResult FFMpegReaderImplementation::readPacket(AVPacket *packet) {
av_init_packet(packet);
packet->data = nullptr;
packet->size = 0;
int res = 0;
if ((res = av_read_frame(_fmtContext, packet)) < 0) {
if (res == AVERROR_EOF) {
if (_audioStreamId >= 0) {
// queue terminating packet to audio player
VideoSoundPart part;
part.packet = &_packetNull;
part.videoPlayId = _playId;
audioPlayer()->feedFromVideo(std_::move(part));
}
return PacketResult::EndOfFile;
}
char err[AV_ERROR_MAX_STRING_SIZE] = { 0 };
LOG(("Gif Error: Unable to av_read_frame() %1, error %2, %3").arg(logData()).arg(res).arg(av_make_error_string(err, sizeof(err), res)));
return PacketResult::Error;
}
return PacketResult::Ok;
}
void FFMpegReaderImplementation::processPacket(AVPacket *packet) {
bool videoPacket = (packet->stream_index == _streamId);
bool audioPacket = (_audioStreamId >= 0 && packet->stream_index == _audioStreamId);
if (audioPacket || videoPacket) {
if (videoPacket) {
_lastReadVideoMs = countPacketMs(packet);
_packetQueue.enqueue(FFMpeg::dataWrapFromPacket(*packet));
} else if (audioPacket) {
_lastReadAudioMs = countPacketMs(packet);
// queue packet to audio player
VideoSoundPart part;
part.packet = packet;
part.videoPlayId = _playId;
audioPlayer()->feedFromVideo(std_::move(part));
}
} else {
av_packet_unref(packet);
}
}
int64 FFMpegReaderImplementation::countPacketMs(AVPacket *packet) const {
int64 packetPts = (packet->pts == AV_NOPTS_VALUE) ? packet->dts : packet->pts;
int64 packetMs = (packetPts * 1000LL * _fmtContext->streams[packet->stream_index]->time_base.num) / _fmtContext->streams[packet->stream_index]->time_base.den;
return packetMs;
}
FFMpegReaderImplementation::PacketResult FFMpegReaderImplementation::readAndProcessPacket() {
AVPacket packet;
auto result = readPacket(&packet);
if (result == PacketResult::Ok) {
processPacket(&packet);
}
return result;
}
void FFMpegReaderImplementation::startPacket() {
if (!_packetStarted && !_packetQueue.isEmpty()) {
AVPacket packet;
FFMpeg::packetFromDataWrap(packet, _packetQueue.head());
_packetStartedSize = packet.size;
_packetStartedData = packet.data;
_packetStarted = true;
}
}
void FFMpegReaderImplementation::finishPacket() {
if (_packetStarted) {
AVPacket packet;
FFMpeg::packetFromDataWrap(packet, _packetQueue.head());
packet.size = _packetStartedSize;
packet.data = _packetStartedData;
_packetStarted = false;
av_packet_unref(&packet);
_packetQueue.dequeue();
}
}
void FFMpegReaderImplementation::clearPacketQueue() {
finishPacket();
auto packets = createAndSwap(_packetQueue);
for (auto &packetData : packets) {
AVPacket packet;
FFMpeg::packetFromDataWrap(packet, packetData);
av_packet_unref(&packet);
}
}
int FFMpegReaderImplementation::_read(void *opaque, uint8_t *buf, int buf_size) {
FFMpegReaderImplementation *l = reinterpret_cast<FFMpegReaderImplementation*>(opaque);
return int(l->_device->read((char*)(buf), buf_size));
}
int64_t FFMpegReaderImplementation::_seek(void *opaque, int64_t offset, int whence) {
FFMpegReaderImplementation *l = reinterpret_cast<FFMpegReaderImplementation*>(opaque);
switch (whence) {
case SEEK_SET: return l->_device->seek(offset) ? l->_device->pos() : -1;
case SEEK_CUR: return l->_device->seek(l->_device->pos() + offset) ? l->_device->pos() : -1;
case SEEK_END: return l->_device->seek(l->_device->size() + offset) ? l->_device->pos() : -1;
}
return -1;
}
} // namespace internal
} // namespace Clip
} // namespace Media