115 lines
2.7 KiB
C++
115 lines
2.7 KiB
C++
/*
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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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#pragma once
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#include "media/clip/media_clip_implementation.h"
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#include "ffmpeg/ffmpeg_utility.h"
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extern "C" {
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#include <libswscale/swscale.h>
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#include <libavutil/opt.h>
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} // extern "C"
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#include <deque>
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//#include "media/streaming/media_streaming_utility.h"
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namespace Media {
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namespace Clip {
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namespace internal {
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constexpr auto kMaxInMemory = 10 * 1024 * 1024;
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class FFMpegReaderImplementation : public ReaderImplementation {
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public:
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FFMpegReaderImplementation(Core::FileLocation *location, QByteArray *data);
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ReadResult readFramesTill(crl::time frameMs, crl::time systemMs) override;
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crl::time frameRealTime() const override;
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crl::time framePresentationTime() const override;
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bool renderFrame(QImage &to, bool &hasAlpha, const QSize &size) override;
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crl::time durationMs() const override;
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bool start(Mode mode, crl::time &positionMs) override;
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bool inspectAt(crl::time &positionMs);
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QString logData() const;
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bool isGifv() 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(FFmpeg::Packet &packet);
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void processPacket(FFmpeg::Packet &&packet);
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crl::time countPacketMs(const FFmpeg::Packet &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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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::Silent;
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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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AVCodecContext *_codecContext = nullptr;
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int _streamId = 0;
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FFmpeg::FramePointer _frame;
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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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bool _hasAudioStream = false;
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crl::time _lastReadVideoMs = 0;
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crl::time _lastReadAudioMs = 0;
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std::deque<FFmpeg::Packet> _packetQueue;
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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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crl::time _frameMs = 0;
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int _nextFrameDelay = 0;
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int _currentFrameDelay = 0;
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crl::time _frameTime = 0;
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crl::time _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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