/*
 * MIT License
 *
 * Copyright (c) 2016-2019 xiongziliang <771730766@qq.com>
 *
 * This file is part of ZLMediaKit(https://github.com/xiongziliang/ZLMediaKit).
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

#ifndef ZLMEDIAKIT_STAMP_H
#define ZLMEDIAKIT_STAMP_H

#include "Util/TimeTicker.h"
#include <cstdint>
using namespace toolkit;

namespace mediakit {

//该类解决时间戳回环、回退问题
//计算相对时间戳或者产生平滑时间戳
class Stamp {
public:
    Stamp() = default;
    ~Stamp() = default;

    /**
     * 设置回放模式，回放模式时间戳可以回退
     * @param playback 是否为回放模式
     */
    void setPlayBack(bool playback = true);

    /**
     * 修正时间戳
     * @param dts 输入dts，如果为0则根据系统时间戳生成
     * @param pts 输入pts，如果为0则等于dts
     * @param dts_out 输出dts
     * @param pts_out 输出pts
     */
    void revise(uint32_t dts, uint32_t pts, int64_t &dts_out, int64_t &pts_out);
private:
    bool _playback = false;
    int64_t _start_dts = 0;
    int64_t _dts_inc = 0;
    bool _first = true;
    SmoothTicker _ticker;
};

}//namespace mediakit

#endif //ZLMEDIAKIT_STAMP_H