h264_decoder.hpp

//
// Created by pengx on 2026/2/9.
//

#ifndef GB28181_H264_DECODER_HPP
#define GB28181_H264_DECODER_HPP

#include <QObject>
#include <vector>
#include <opencv2/core/mat.hpp>

extern "C" {
#include <libavcodec/avcodec.h>
#include <libavutil/frame.h>
#include <libswscale/swscale.h>
}

class H264Decoder final : public QObject {
    Q_OBJECT

public:
    explicit H264Decoder(QObject* parent = nullptr);
    ~H264Decoder() override;

public slots:
    // 解码H.264数据为cv::Mat帧
    void decodeH264Data(const std::vector<uint8_t>& h264Data, uint32_t pts);

signals:
    // 解码后的帧数据
    void frameDecoded(const cv::Mat& frame);

private:
    // ffmpeg库内部有指针管理，无需智能指针
    AVCodecContext* _codecContextPtr = nullptr;
    AVFrame* _framePtr = nullptr;
    AVPacket* _packetPtr = nullptr;
    SwsContext* _swsContextPtr = nullptr;

    bool initializeDecoder();

    void cleanupDecoder();
};


#endif //GB28181_H264_DECODER_HPP