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54 lines
1.3 KiB
54 lines
1.3 KiB
#pragma once
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#include <atomic>
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#include <condition_variable>
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#include <mutex>
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#include <optional>
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#include <string>
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#include <thread>
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#include <vector>
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// independent of QT, needs ffmpeg
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extern "C" {
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#include <libavcodec/avcodec.h>
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#include <libavformat/avformat.h>
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#include <libswscale/swscale.h>
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}
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class FrameReader {
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public:
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FrameReader();
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~FrameReader();
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bool load(const std::string &url);
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std::optional<std::pair<uint8_t *, uint8_t*>> get(int idx);
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int getRGBSize() const { return width * height * 3; }
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int getYUVSize() const { return width * height * 3 / 2; }
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size_t getFrameCount() const { return frames_.size(); }
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bool valid() const { return valid_; }
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int width = 0, height = 0;
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private:
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void decodeThread();
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std::pair<uint8_t *, uint8_t *> decodeFrame(AVPacket *pkt);
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struct Frame {
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AVPacket pkt = {};
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std::unique_ptr<uint8_t[]> rgb_data = nullptr;
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std::unique_ptr<uint8_t[]> yuv_data = nullptr;
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bool failed = false;
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};
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std::vector<Frame> frames_;
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AVFormatContext *pFormatCtx_ = nullptr;
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AVCodecContext *pCodecCtx_ = nullptr;
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AVFrame *frmRgb_ = nullptr;
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struct SwsContext *sws_ctx_ = nullptr;
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std::mutex mutex_;
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std::condition_variable cv_decode_;
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std::condition_variable cv_frame_;
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int decode_idx_ = 0;
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std::atomic<bool> exit_ = false;
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bool valid_ = false;
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std::thread decode_thread_;
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};
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