135 lines
3.4 KiB
C++
135 lines
3.4 KiB
C++
/*
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This file is part of Telegram Desktop,
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the official desktop version of Telegram messaging app, see https://telegram.org
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Telegram Desktop is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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It is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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In addition, as a special exception, the copyright holders give permission
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to link the code of portions of this program with the OpenSSL library.
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Full license: https://github.com/telegramdesktop/tdesktop/blob/master/LICENSE
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Copyright (c) 2014-2016 John Preston, https://desktop.telegram.org
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*/
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#pragma once
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extern "C" {
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#include <libswscale/swscale.h>
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} // extern "C"
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#include "media/media_clip_implementation.h"
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#include "media/media_child_ffmpeg_loader.h"
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namespace Media {
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namespace Clip {
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namespace internal {
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class FFMpegReaderImplementation : public ReaderImplementation {
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public:
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FFMpegReaderImplementation(FileLocation *location, QByteArray *data, uint64 playId);
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ReadResult readFramesTill(int64 frameMs, uint64 systemMs) override;
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int64 frameRealTime() const override;
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uint64 framePresentationTime() const override;
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bool renderFrame(QImage &to, bool &hasAlpha, const QSize &size) override;
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int64 durationMs() const override;
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bool hasAudio() const override {
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return (_audioStreamId >= 0);
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}
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void pauseAudio() override;
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void resumeAudio() override;
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bool start(Mode mode, int64 &positionMs) override;
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QString logData() const;
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~FFMpegReaderImplementation();
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private:
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ReadResult readNextFrame();
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void processReadFrame();
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enum class PacketResult {
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Ok,
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EndOfFile,
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Error,
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};
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PacketResult readPacket(AVPacket *packet);
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void processPacket(AVPacket *packet);
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int64 countPacketMs(AVPacket *packet) const;
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PacketResult readAndProcessPacket();
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enum class Rotation {
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None,
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Degrees90,
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Degrees180,
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Degrees270,
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};
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Rotation rotationFromDegrees(int degrees) const;
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bool rotationSwapWidthHeight() const {
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return (_rotation == Rotation::Degrees90) || (_rotation == Rotation::Degrees270);
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}
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void startPacket();
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void finishPacket();
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void clearPacketQueue();
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static int _read(void *opaque, uint8_t *buf, int buf_size);
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static int64_t _seek(void *opaque, int64_t offset, int whence);
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Mode _mode = Mode::Normal;
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Rotation _rotation = Rotation::None;
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uchar *_ioBuffer = nullptr;
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AVIOContext *_ioContext = nullptr;
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AVFormatContext *_fmtContext = nullptr;
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AVCodec *_codec = nullptr;
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AVCodecContext *_codecContext = nullptr;
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int _streamId = 0;
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AVFrame *_frame = nullptr;
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bool _opened = false;
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bool _hadFrame = false;
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bool _frameRead = false;
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int _skippedInvalidDataPackets = 0;
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int _audioStreamId = -1;
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uint64 _playId = 0;
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int64 _lastReadVideoMs = 0;
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int64 _lastReadAudioMs = 0;
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QQueue<FFMpeg::AVPacketDataWrap> _packetQueue;
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AVPacket _packetNull; // for final decoding
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int _packetStartedSize = 0;
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uint8_t *_packetStartedData = nullptr;
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bool _packetStarted = false;
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int _width = 0;
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int _height = 0;
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SwsContext *_swsContext = nullptr;
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QSize _swsSize;
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int64 _frameMs = 0;
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int _nextFrameDelay = 0;
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int _currentFrameDelay = 0;
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int64 _frameTime = 0;
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int64 _frameTimeCorrection = 0;
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};
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} // namespace internal
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} // namespace Clip
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} // namespace Media
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