138 lines
3.5 KiB
C++
138 lines
3.5 KiB
C++
/***
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Olive - Non-Linear Video Editor
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Copyright (C) 2019 Olive Team
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This program 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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This program 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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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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***/
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#ifndef FFMPEGDECODER_H
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#define FFMPEGDECODER_H
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extern "C" {
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#include <libavformat/avformat.h>
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#include <libswscale/swscale.h>
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#include <libswresample/swresample.h>
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}
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#include <QAtomicInt>
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#include <QTimer>
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#include <QVector>
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#include "audio/sampleformat.h"
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#include "codec/decoder.h"
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#include "codec/waveoutput.h"
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#include "ffmpegframecache.h"
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#include "project/item/footage/videostream.h"
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/**
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* @brief A Decoder derivative that wraps FFmpeg functions as on Olive decoder
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*/
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class FFmpegDecoder : public Decoder
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{
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Q_OBJECT
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public:
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// Constructor
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FFmpegDecoder();
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// Destructor
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virtual ~FFmpegDecoder() override;
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virtual bool Probe(Footage *f, const QAtomicInt *cancelled) override;
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virtual bool Open() override;
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virtual RetrieveState GetRetrieveState(const rational &time) override;
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virtual FramePtr RetrieveVideo(const rational &timecode, const int& divider) override;
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virtual FramePtr RetrieveAudio(const rational &timecode, const rational &length, const AudioRenderingParams& params) override;
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virtual void Close() override;
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virtual QString id() override;
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virtual bool SupportsVideo() override;
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virtual bool SupportsAudio() override;
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virtual void Index(const QAtomicInt *cancelled) override;
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private:
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/**
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* @brief Handle an error
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*
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* Immediately closes the Decoder (freeing memory resources) and sends the string provided to the warning stream.
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* As this function closes the Decoder, no further Decoder functions should be performed after this is called
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* (unless the Decoder is opened again first).
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*/
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void Error(const QString& s);
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/**
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* @brief Handle an FFmpeg error code
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*
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* Uses the FFmpeg API to retrieve a descriptive string for this error code and sends it to Error(). As such, this
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* function also automatically closes the Decoder.
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*
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* @param error_code
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*/
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void FFmpegError(int error_code);
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/**
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* @brief Uses the FFmpeg API to retrieve a packet (stored in pkt_) and decode it (stored in frame_)
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*
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* @return
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*
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* An FFmpeg error code, or >= 0 on success
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*/
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int GetFrame(AVPacket* pkt, AVFrame* frame);
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virtual QString GetIndexFilename() override;
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void UnconditionalAudioIndex(const QAtomicInt* cancelled);
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void Seek(int64_t timestamp);
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void CacheFrameToDisk(AVFrame* f);
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void ClearFrameCache();
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void ClearResources();
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void SetupScaler(const int& divider);
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void FreeScaler();
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AVFormatContext* fmt_ctx_;
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AVCodecContext* codec_ctx_;
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AVStream* avstream_;
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AVPixelFormat ideal_pix_fmt_;
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PixelFormat::Format native_pix_fmt_;
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SwsContext* scale_ctx_;
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int scale_divider_;
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FFmpegFrameCache::Client cached_frames_;
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bool cache_at_zero_;
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bool cache_at_eof_;
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int64_t second_ts_;
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AVDictionary* opts_;
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QTimer clear_timer_;
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private slots:
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void ClearTimerEvent();
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};
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#endif // FFMPEGDECODER_H
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