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This commit is contained in:
allhaileris
514
Telegram/SourceFiles/media/clip/media_clip_ffmpeg.cpp
Normal file
514
Telegram/SourceFiles/media/clip/media_clip_ffmpeg.cpp
Normal file
@@ -0,0 +1,514 @@
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/*
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This file is part of Telegram Desktop,
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the official desktop application for the Telegram messaging service.
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For license and copyright information please follow this link:
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https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
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*/
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#include "media/clip/media_clip_ffmpeg.h"
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#include "core/file_location.h"
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#include "logs.h"
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namespace Media {
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namespace Clip {
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namespace internal {
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namespace {
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constexpr auto kSkipInvalidDataPackets = 10;
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constexpr auto kMaxInlineArea = 1280 * 720;
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constexpr auto kMaxSendingArea = 3840 * 2160; // usual 4K
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// See https://github.com/telegramdesktop/tdesktop/issues/7225
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constexpr auto kAlignImageBy = 64;
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void alignedImageBufferCleanupHandler(void *data) {
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auto buffer = static_cast<uchar*>(data);
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delete[] buffer;
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}
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// Create a QImage of desired size where all the data is aligned to 16 bytes.
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QImage createAlignedImage(QSize size) {
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auto width = size.width();
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auto height = size.height();
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auto widthalign = kAlignImageBy / 4;
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auto neededwidth = width + ((width % widthalign) ? (widthalign - (width % widthalign)) : 0);
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auto bytesperline = neededwidth * 4;
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auto buffer = new uchar[bytesperline * height + kAlignImageBy];
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auto cleanupdata = static_cast<void*>(buffer);
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auto bufferval = reinterpret_cast<uintptr_t>(buffer);
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auto alignedbuffer = buffer + ((bufferval % kAlignImageBy) ? (kAlignImageBy - (bufferval % kAlignImageBy)) : 0);
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return QImage(alignedbuffer, width, height, bytesperline, QImage::Format_ARGB32_Premultiplied, alignedImageBufferCleanupHandler, cleanupdata);
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}
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bool isAlignedImage(const QImage &image) {
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return !(reinterpret_cast<uintptr_t>(image.constBits()) % kAlignImageBy) && !(image.bytesPerLine() % kAlignImageBy);
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}
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} // namespace
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FFMpegReaderImplementation::FFMpegReaderImplementation(
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Core::FileLocation *location,
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QByteArray *data)
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: ReaderImplementation(location, data)
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, _frame(FFmpeg::MakeFramePointer()) {
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}
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ReaderImplementation::ReadResult FFMpegReaderImplementation::readNextFrame() {
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do {
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int res = avcodec_receive_frame(_codecContext, _frame.get());
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if (res >= 0) {
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const auto limit = (_mode == Mode::Inspecting)
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? kMaxSendingArea
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: kMaxInlineArea;
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if (_frame->width * _frame->height > limit) {
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return ReadResult::Error;
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}
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processReadFrame();
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return ReadResult::Success;
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}
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if (res == AVERROR_EOF) {
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_packetQueue.clear();
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if (!_hadFrame) {
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LOG(("Gif Error: Got EOF before a single frame was read!"));
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return ReadResult::Error;
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}
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if ((res = avformat_seek_file(_fmtContext, _streamId, std::numeric_limits<int64_t>::min(), 0, std::numeric_limits<int64_t>::max(), 0)) < 0) {
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if ((res = av_seek_frame(_fmtContext, _streamId, 0, AVSEEK_FLAG_BYTE)) < 0) {
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if ((res = av_seek_frame(_fmtContext, _streamId, 0, AVSEEK_FLAG_FRAME)) < 0) {
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if ((res = av_seek_frame(_fmtContext, _streamId, 0, 0)) < 0) {
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char err[AV_ERROR_MAX_STRING_SIZE] = { 0 };
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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)));
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return ReadResult::Error;
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}
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}
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}
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}
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avcodec_flush_buffers(_codecContext);
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_hadFrame = false;
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_frameMs = 0;
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_lastReadVideoMs = _lastReadAudioMs = 0;
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_skippedInvalidDataPackets = 0;
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_frameIndex = -1;
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continue;
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} else if (res != AVERROR(EAGAIN)) {
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char err[AV_ERROR_MAX_STRING_SIZE] = { 0 };
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LOG(("Gif Error: Unable to avcodec_receive_frame() %1, error %2, %3").arg(logData()).arg(res).arg(av_make_error_string(err, sizeof(err), res)));
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return ReadResult::Error;
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}
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while (_packetQueue.empty()) {
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auto packetResult = readAndProcessPacket();
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if (packetResult == PacketResult::Error) {
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return ReadResult::Error;
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} else if (packetResult == PacketResult::EndOfFile) {
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break;
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}
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}
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if (_packetQueue.empty()) {
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avcodec_send_packet(_codecContext, nullptr); // drain
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continue;
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}
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auto packet = std::move(_packetQueue.front());
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_packetQueue.pop_front();
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const auto native = &packet.fields();
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const auto guard = gsl::finally([
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&,
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size = native->size,
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data = native->data
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] {
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native->size = size;
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native->data = data;
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packet = FFmpeg::Packet();
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});
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res = avcodec_send_packet(_codecContext, native);
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if (res < 0) {
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char err[AV_ERROR_MAX_STRING_SIZE] = { 0 };
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LOG(("Gif Error: Unable to avcodec_send_packet() %1, error %2, %3").arg(logData()).arg(res).arg(av_make_error_string(err, sizeof(err), res)));
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if (res == AVERROR_INVALIDDATA) {
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if (++_skippedInvalidDataPackets < kSkipInvalidDataPackets) {
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continue; // try to skip bad packet
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}
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}
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return ReadResult::Error;
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}
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} while (true);
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return ReadResult::Error;
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}
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void FFMpegReaderImplementation::processReadFrame() {
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int64 duration = _frame->duration;
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int64 framePts = _frame->pts;
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crl::time frameMs = (framePts * 1000LL * _fmtContext->streams[_streamId]->time_base.num) / _fmtContext->streams[_streamId]->time_base.den;
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_currentFrameDelay = _nextFrameDelay;
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if (_frameMs + _currentFrameDelay < frameMs) {
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_currentFrameDelay = int32(frameMs - _frameMs);
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} else if (frameMs < _frameMs + _currentFrameDelay) {
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frameMs = _frameMs + _currentFrameDelay;
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}
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if (duration == AV_NOPTS_VALUE) {
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_nextFrameDelay = 0;
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} else {
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_nextFrameDelay = (duration * 1000LL * _fmtContext->streams[_streamId]->time_base.num) / _fmtContext->streams[_streamId]->time_base.den;
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}
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_frameMs = frameMs;
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_hadFrame = _frameRead = true;
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_frameTime += _currentFrameDelay;
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++_frameIndex;
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}
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ReaderImplementation::ReadResult FFMpegReaderImplementation::readFramesTill(crl::time frameMs, crl::time systemMs) {
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if (_frameRead && _frameTime > frameMs) {
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return ReadResult::Success;
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}
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auto readResult = readNextFrame();
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if (readResult != ReadResult::Success || _frameTime > frameMs) {
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return readResult;
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}
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readResult = readNextFrame();
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if (_frameTime <= frameMs) {
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_frameTime = frameMs + 5; // keep up
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}
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return readResult;
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}
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crl::time FFMpegReaderImplementation::frameRealTime() const {
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return _frameMs;
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}
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crl::time FFMpegReaderImplementation::framePresentationTime() const {
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return qMax(_frameTime + _frameTimeCorrection, crl::time(0));
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}
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crl::time FFMpegReaderImplementation::durationMs() const {
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const auto rebase = [](int64_t duration, const AVRational &base) {
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return (duration * 1000LL * base.num) / base.den;
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};
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const auto stream = _fmtContext->streams[_streamId];
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if (stream->duration != AV_NOPTS_VALUE) {
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return rebase(stream->duration, stream->time_base);
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} else if (_fmtContext->duration != AV_NOPTS_VALUE) {
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return rebase(_fmtContext->duration, AVRational{ 1, AV_TIME_BASE });
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}
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return 0;
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}
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bool FFMpegReaderImplementation::renderFrame(
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QImage &to,
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bool &hasAlpha,
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int &index,
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const QSize &size) {
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Expects(_frameRead);
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_frameRead = false;
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index = _frameIndex;
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if (!_width || !_height) {
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_width = _frame->width;
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_height = _frame->height;
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if (!_width || !_height) {
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LOG(("Gif Error: Bad frame size %1").arg(logData()));
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return false;
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}
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}
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QSize toSize(size.isEmpty() ? QSize(_width, _height) : size);
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if (!size.isEmpty() && rotationSwapWidthHeight()) {
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toSize.transpose();
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}
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if (to.isNull() || to.size() != toSize || !to.isDetached() || !isAlignedImage(to)) {
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to = createAlignedImage(toSize);
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}
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const auto format = (_frame->format == AV_PIX_FMT_NONE)
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? _codecContext->pix_fmt
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: _frame->format;
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const auto bgra = (format == AV_PIX_FMT_BGRA);
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hasAlpha = bgra || (format == AV_PIX_FMT_YUVA420P);
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if (_frame->width == toSize.width() && _frame->height == toSize.height() && bgra) {
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int32 sbpl = _frame->linesize[0], dbpl = to.bytesPerLine(), bpl = qMin(sbpl, dbpl);
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uchar *s = _frame->data[0], *d = to.bits();
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for (int32 i = 0, l = _frame->height; i < l; ++i) {
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memcpy(d + i * dbpl, s + i * sbpl, bpl);
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}
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} else {
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if ((_swsSize != toSize) || (_frame->format != -1 && _frame->format != _codecContext->pix_fmt) || !_swsContext) {
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_swsSize = toSize;
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_swsContext = sws_getCachedContext(_swsContext, _frame->width, _frame->height, AVPixelFormat(_frame->format), toSize.width(), toSize.height(), AV_PIX_FMT_BGRA, 0, nullptr, nullptr, nullptr);
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}
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// AV_NUM_DATA_POINTERS defined in AVFrame struct
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uint8_t *toData[AV_NUM_DATA_POINTERS] = { to.bits(), nullptr };
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int toLinesize[AV_NUM_DATA_POINTERS] = { int(to.bytesPerLine()), 0 };
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sws_scale(_swsContext, _frame->data, _frame->linesize, 0, _frame->height, toData, toLinesize);
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}
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if (hasAlpha) {
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FFmpeg::PremultiplyInplace(to);
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}
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if (_rotation != Rotation::None) {
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QTransform rotationTransform;
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switch (_rotation) {
|
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case Rotation::Degrees90: rotationTransform.rotate(90); break;
|
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case Rotation::Degrees180: rotationTransform.rotate(180); break;
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case Rotation::Degrees270: rotationTransform.rotate(270); break;
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}
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to = to.transformed(rotationTransform);
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}
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|
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FFmpeg::ClearFrameMemory(_frame.get());
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return true;
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}
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|
||||
FFMpegReaderImplementation::Rotation FFMpegReaderImplementation::rotationFromDegrees(int degrees) const {
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switch (degrees) {
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case 90: return Rotation::Degrees90;
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case 180: return Rotation::Degrees180;
|
||||
case 270: return Rotation::Degrees270;
|
||||
}
|
||||
return Rotation::None;
|
||||
}
|
||||
|
||||
bool FFMpegReaderImplementation::start(Mode mode, crl::time &positionMs) {
|
||||
_mode = mode;
|
||||
|
||||
initDevice();
|
||||
if (!_device->open(QIODevice::ReadOnly)) {
|
||||
LOG(("Gif Error: Unable to open device %1").arg(logData()));
|
||||
return false;
|
||||
}
|
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_ioBuffer = (uchar*)av_malloc(FFmpeg::kAVBlockSize);
|
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_ioContext = avio_alloc_context(_ioBuffer, FFmpeg::kAVBlockSize, 0, static_cast<void*>(this), &FFMpegReaderImplementation::Read, nullptr, &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, nullptr, nullptr, nullptr)) < 0) {
|
||||
_ioBuffer = nullptr;
|
||||
|
||||
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, nullptr)) < 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, nullptr, 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;
|
||||
}
|
||||
|
||||
auto rotateTag = av_dict_get(_fmtContext->streams[_streamId]->metadata, "rotate", nullptr, 0);
|
||||
if (rotateTag && *rotateTag->value) {
|
||||
auto stringRotateTag = QString::fromUtf8(rotateTag->value);
|
||||
auto toIntSucceeded = false;
|
||||
auto rotateDegrees = stringRotateTag.toInt(&toIntSucceeded);
|
||||
if (toIntSucceeded) {
|
||||
_rotation = rotationFromDegrees(rotateDegrees);
|
||||
}
|
||||
}
|
||||
|
||||
_codecContext = avcodec_alloc_context3(nullptr);
|
||||
if (!_codecContext) {
|
||||
LOG(("Gif Error: Unable to avcodec_alloc_context3 %1").arg(logData()));
|
||||
return false;
|
||||
}
|
||||
if ((res = avcodec_parameters_to_context(_codecContext, _fmtContext->streams[_streamId]->codecpar)) < 0) {
|
||||
LOG(("Gif 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;
|
||||
}
|
||||
_codecContext->pkt_timebase = _fmtContext->streams[_streamId]->time_base;
|
||||
av_opt_set_int(_codecContext, "refcounted_frames", 1, 0);
|
||||
|
||||
const auto codec = FFmpeg::FindDecoder(_codecContext);
|
||||
if (!codec) {
|
||||
LOG(("Gif Error: Unable to avcodec_find_decoder %1").arg(logData()));
|
||||
return false;
|
||||
}
|
||||
if (_mode == Mode::Inspecting) {
|
||||
const auto audioStreamId = av_find_best_stream(_fmtContext, AVMEDIA_TYPE_AUDIO, -1, -1, nullptr, 0);
|
||||
_hasAudioStream = (audioStreamId >= 0);
|
||||
}
|
||||
|
||||
if ((res = avcodec_open2(_codecContext, codec, nullptr)) < 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;
|
||||
}
|
||||
|
||||
if (positionMs > 0) {
|
||||
const auto timeBase = _fmtContext->streams[_streamId]->time_base;
|
||||
const auto timeStamp = (positionMs * timeBase.den)
|
||||
/ (1000LL * timeBase.num);
|
||||
if (av_seek_frame(_fmtContext, _streamId, timeStamp, 0) < 0) {
|
||||
if (av_seek_frame(_fmtContext, _streamId, timeStamp, AVSEEK_FLAG_BACKWARD) < 0) {
|
||||
return false;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
FFmpeg::Packet packet;
|
||||
auto readResult = readPacket(packet);
|
||||
if (readResult == PacketResult::Ok && positionMs > 0) {
|
||||
positionMs = countPacketMs(packet);
|
||||
}
|
||||
|
||||
if (readResult == PacketResult::Ok) {
|
||||
processPacket(std::move(packet));
|
||||
}
|
||||
|
||||
return true;
|
||||
}
|
||||
|
||||
bool FFMpegReaderImplementation::inspectAt(crl::time &positionMs) {
|
||||
if (positionMs > 0) {
|
||||
const auto timeBase = _fmtContext->streams[_streamId]->time_base;
|
||||
const auto timeStamp = (positionMs * timeBase.den)
|
||||
/ (1000LL * timeBase.num);
|
||||
if (av_seek_frame(_fmtContext, _streamId, timeStamp, 0) < 0) {
|
||||
if (av_seek_frame(_fmtContext, _streamId, timeStamp, AVSEEK_FLAG_BACKWARD) < 0) {
|
||||
return false;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
_packetQueue.clear();
|
||||
|
||||
FFmpeg::Packet packet;
|
||||
auto readResult = readPacket(packet);
|
||||
if (readResult == PacketResult::Ok && positionMs > 0) {
|
||||
positionMs = countPacketMs(packet);
|
||||
}
|
||||
|
||||
if (readResult == PacketResult::Ok) {
|
||||
processPacket(std::move(packet));
|
||||
}
|
||||
|
||||
return true;
|
||||
}
|
||||
|
||||
bool FFMpegReaderImplementation::isGifv() const {
|
||||
if (_hasAudioStream) {
|
||||
return false;
|
||||
}
|
||||
if (dataSize() > kMaxInMemory) {
|
||||
return false;
|
||||
}
|
||||
if (_codecContext->codec_id != AV_CODEC_ID_H264) {
|
||||
return false;
|
||||
}
|
||||
return true;
|
||||
}
|
||||
|
||||
bool FFMpegReaderImplementation::isWebmSticker() const {
|
||||
if (_hasAudioStream) {
|
||||
return false;
|
||||
}
|
||||
if (dataSize() > kMaxInMemory) {
|
||||
return false;
|
||||
}
|
||||
if (_codecContext->codec_id != AV_CODEC_ID_VP9) {
|
||||
return false;
|
||||
}
|
||||
return true;
|
||||
}
|
||||
|
||||
QString FFMpegReaderImplementation::logData() const {
|
||||
return u"for file '%1', data size '%2'"_q.arg(_location ? _location->name() : QString()).arg(_data->size());
|
||||
}
|
||||
|
||||
FFMpegReaderImplementation::~FFMpegReaderImplementation() {
|
||||
if (_codecContext) avcodec_free_context(&_codecContext);
|
||||
if (_swsContext) sws_freeContext(_swsContext);
|
||||
if (_opened) {
|
||||
avformat_close_input(&_fmtContext);
|
||||
}
|
||||
if (_ioContext) {
|
||||
av_freep(&_ioContext->buffer);
|
||||
av_freep(&_ioContext);
|
||||
} else if (_ioBuffer) {
|
||||
av_freep(&_ioBuffer);
|
||||
}
|
||||
if (_fmtContext) avformat_free_context(_fmtContext);
|
||||
}
|
||||
|
||||
FFMpegReaderImplementation::PacketResult FFMpegReaderImplementation::readPacket(FFmpeg::Packet &packet) {
|
||||
int res = 0;
|
||||
if ((res = av_read_frame(_fmtContext, &packet.fields())) < 0) {
|
||||
if (res == AVERROR_EOF) {
|
||||
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(FFmpeg::Packet &&packet) {
|
||||
const auto &native = packet.fields();
|
||||
auto videoPacket = (native.stream_index == _streamId);
|
||||
if (videoPacket) {
|
||||
_lastReadVideoMs = countPacketMs(packet);
|
||||
_packetQueue.push_back(std::move(packet));
|
||||
}
|
||||
}
|
||||
|
||||
crl::time FFMpegReaderImplementation::countPacketMs(
|
||||
const FFmpeg::Packet &packet) const {
|
||||
const auto &native = packet.fields();
|
||||
int64 packetPts = (native.pts == AV_NOPTS_VALUE) ? native.dts : native.pts;
|
||||
crl::time packetMs = (packetPts * 1000LL * _fmtContext->streams[native.stream_index]->time_base.num) / _fmtContext->streams[native.stream_index]->time_base.den;
|
||||
return packetMs;
|
||||
}
|
||||
|
||||
FFMpegReaderImplementation::PacketResult FFMpegReaderImplementation::readAndProcessPacket() {
|
||||
FFmpeg::Packet packet;
|
||||
auto result = readPacket(packet);
|
||||
if (result == PacketResult::Ok) {
|
||||
processPacket(std::move(packet));
|
||||
}
|
||||
return result;
|
||||
}
|
||||
|
||||
int FFMpegReaderImplementation::Read(void *opaque, uint8_t *buf, int buf_size) {
|
||||
FFMpegReaderImplementation *l = reinterpret_cast<FFMpegReaderImplementation*>(opaque);
|
||||
int ret = l->_device->read((char*)(buf), buf_size);
|
||||
switch (ret) {
|
||||
case -1: return AVERROR_EXTERNAL;
|
||||
case 0: return AVERROR_EOF;
|
||||
default: return ret;
|
||||
}
|
||||
}
|
||||
|
||||
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;
|
||||
case AVSEEK_SIZE: {
|
||||
// Special whence for determining filesize without any seek.
|
||||
return l->_dataSize;
|
||||
} break;
|
||||
}
|
||||
return -1;
|
||||
}
|
||||
|
||||
} // namespace internal
|
||||
} // namespace Clip
|
||||
} // namespace Media
|
||||
Reference in New Issue
Block a user