/*
 * Copyright (c) 2016 The ZLMediaKit project authors. All Rights Reserved.
 *
 * This file is part of ZLMediaKit(https://github.com/xia-chu/ZLMediaKit).
 *
 * Use of this source code is governed by MIT license that can be found in the
 * LICENSE file in the root of the source tree. All contributing project authors
 * may be found in the AUTHORS file in the root of the source tree.
 */

#ifndef ZLMEDIAKIT_H264RTMPCODEC_H
#define ZLMEDIAKIT_H264RTMPCODEC_H

#include "Rtmp/RtmpCodec.h"
#include "Extension/Track.h"
#include "Extension/H264.h"

namespace mediakit{
/**
 * h264 Rtmp解码类
 * 将 h264 over rtmp 解复用出 h264-Frame
 */
class H264RtmpDecoder : public RtmpCodec {
public:
    using Ptr = std::shared_ptr<H264RtmpDecoder>;

    H264RtmpDecoder();
    ~H264RtmpDecoder() {}

    /**
     * 输入264 Rtmp包
     * @param rtmp Rtmp包
     */
    void inputRtmp(const RtmpPacket::Ptr &rtmp) override;

    CodecId getCodecId() const override{
        return CodecH264;
    }

protected:
    void onGetH264(const char *data, size_t len, uint32_t dts, uint32_t pts);
    H264Frame::Ptr obtainFrame();

protected:
    H264Frame::Ptr _h264frame;
    std::string _sps;
    std::string _pps;
};

/**
 * 264 Rtmp打包类
 */
class H264RtmpEncoder : public H264RtmpDecoder{
public:
    using Ptr = std::shared_ptr<H264RtmpEncoder>;

    /**
     * 构造函数，track可以为空，此时则在inputFrame时输入sps pps
     * 如果track不为空且包含sps pps信息，
     * 那么inputFrame时可以不输入sps pps
     * @param track
     */
    H264RtmpEncoder(const Track::Ptr &track);
    ~H264RtmpEncoder() = default;

    /**
     * 输入264帧，可以不带sps pps
     * @param frame 帧数据
     */
    bool inputFrame(const Frame::Ptr &frame) override;

    /**
     * 刷新输出所有frame缓存
     */
    void flush() override;

    /**
     * 生成config包
     */
    void makeConfigPacket() override;

private:
    void makeVideoConfigPkt();

private:
    bool _got_config_frame = false;
    H264Track::Ptr _track;
    RtmpPacket::Ptr _rtmp_packet;
    FrameMerger _merger{FrameMerger::mp4_nal_size};
};

}//namespace mediakit

#endif //ZLMEDIAKIT_H264RTMPCODEC_H
