ZLMediaKit/src/Player/PlayerBase.h

/*
 * 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 SRC_PLAYER_PLAYERBASE_H_
#define SRC_PLAYER_PLAYERBASE_H_

#include <map>
#include <memory>
#include <string>
#include <functional>
#include "Network/Socket.h"
#include "Util/mini.h"
#include "Util/RingBuffer.h"
#include "Common/MediaSource.h"
#include "Common/MediaSink.h"
#include "Extension/Frame.h"
#include "Extension/Track.h"
using namespace toolkit;

namespace mediakit {

class DemuxerBase : public TrackSource{
public:
    typedef std::shared_ptr<DemuxerBase> Ptr;

    /**
     * 获取节目总时长，单位秒
     * @return
     */
    virtual float getDuration() const { return 0;}

    /**
     * 是否初始化完毕，完毕后方可调用getTrack方法
     * @param analysisMs 数据流最大分析时间 单位毫秒
     * @return
     */
    virtual bool isInited(int analysisMs) { return true; }
};


class PlayerBase : public DemuxerBase, public mINI{
public:
    typedef std::shared_ptr<PlayerBase> Ptr;
    static Ptr createPlayer(const EventPoller::Ptr &poller,const string &strUrl);

    PlayerBase();
    virtual ~PlayerBase(){}

    /**
     * 开始播放
     * @param strUrl 视频url，支持rtsp/rtmp
     */
    virtual void play(const string &strUrl) {}

    /**
     * 暂停或恢复
     * @param bPause
     */
    virtual void pause(bool bPause) {}

    /**
     * 中断播放
     */
    virtual void teardown() {}

    /**
     * 设置异常中断回调
     * @param cb
     */
    virtual void setOnShutdown( const function<void(const SockException &)> &cb) {}

    /**
     * 设置播放结果回调
     * @param cb
     */
    virtual void setOnPlayResult( const function<void(const SockException &ex)> &cb) {}

    /**
     * 设置播放恢复回调
     * @param cb
     */
    virtual void setOnResume( const function<void()> &cb) {}

    /**
     * 获取播放进度，取值 0.0 ~ 1.0
     * @return
     */
    virtual float getProgress() const { return 0;}

    /**
     * 拖动进度条
     * @param fProgress 进度，取值 0.0 ~ 1.0
     */
    virtual void seekTo(float fProgress) {}

    /**
     * 设置一个MediaSource，直接生产rtsp/rtmp代理
     * @param src
     */
    virtual void setMediaSource(const MediaSource::Ptr & src) {}

    /**
     * 获取丢包率，只支持rtsp
     * @param trackType 音频或视频，TrackInvalid时为总丢包率
     * @return
     */
    virtual float getPacketLossRate(TrackType trackType) const {return 0; }

    /**
     * 获取所有track
     */
    vector<Track::Ptr> getTracks(bool trackReady = true) const override{
        return vector<Track::Ptr>();
    }
protected:
    virtual void onShutdown(const SockException &ex) {}
    virtual void onPlayResult(const SockException &ex) {}
    /**
     * 暂停后恢复播放时间
     */
    virtual void onResume(){};
};

template<typename Parent,typename Delegate>
class PlayerImp : public Parent {
public:
    typedef std::shared_ptr<PlayerImp> Ptr;

    template<typename ...ArgsType>
    PlayerImp(ArgsType &&...args):Parent(std::forward<ArgsType>(args)...){}

    virtual ~PlayerImp(){}
    void setOnShutdown(const function<void(const SockException &)> &cb) override {
        if (_delegate) {
            _delegate->setOnShutdown(cb);
        }
        _shutdownCB = cb;
    }
    void setOnPlayResult(const function<void(const SockException &ex)> &cb) override {
        if (_delegate) {
            _delegate->setOnPlayResult(cb);
        }
        _playResultCB = cb;
    }

    void setOnResume(const function<void()> &cb) override {
        if (_delegate) {
            _delegate->setOnResume(cb);
        }
        _resumeCB = cb;
    }

    bool isInited(int analysisMs) override{
        if (_delegate) {
            return _delegate->isInited(analysisMs);
        }
        return Parent::isInited(analysisMs);
    }
    float getDuration() const override {
        if (_delegate) {
            return _delegate->getDuration();
        }
        return Parent::getDuration();
    }
    float getProgress() const override{
        if (_delegate) {
            return _delegate->getProgress();
        }
        return Parent::getProgress();
    }
    void seekTo(float fProgress) override{
        if (_delegate) {
            return _delegate->seekTo(fProgress);
        }
        return Parent::seekTo(fProgress);
    }

    void setMediaSource(const MediaSource::Ptr & src) override {
        if (_delegate) {
            _delegate->setMediaSource(src);
        }
        _pMediaSrc = src;
    }

    vector<Track::Ptr> getTracks(bool trackReady = true) const override{
        if (_delegate) {
            return _delegate->getTracks(trackReady);
        }
        return Parent::getTracks(trackReady);
    }

    std::shared_ptr<SockInfo> getSockInfo() const{
        return dynamic_pointer_cast<SockInfo>(_delegate);
    }

protected:
    void onShutdown(const SockException &ex) override {
        if (_shutdownCB) {
            _shutdownCB(ex);
            _shutdownCB = nullptr;
        }
    }

    void onPlayResult(const SockException &ex) override {
        if(_playResultCB) {
            _playResultCB(ex);
            _playResultCB = nullptr;
        }
    }

    void onResume() override{
        if(_resumeCB){
            _resumeCB();
        }
    }
protected:
    function<void(const SockException &ex)> _shutdownCB;
    function<void(const SockException &ex)> _playResultCB;
    function<void()> _resumeCB;
    std::shared_ptr<Delegate> _delegate;
    MediaSource::Ptr _pMediaSrc;
};

class Demuxer : public PlayerBase, public TrackListener{
public:
    Demuxer() = default;
    ~Demuxer() override = default;

    /**
     * 返回是否完成初始化完毕
     * 在构造RtspDemuxer对象时有些rtsp的sdp不包含sps pps信息
     * 所以要等待接收到到sps的rtp包后才能完成
     *
     * 在构造RtmpDemuxer对象时是无法获取sps pps aac_cfg等这些信息，
     * 所以要调用inputRtmp后才会获取到这些信息，这时才初始化成功
     * @param analysisMs 数据流最大分析时间 单位毫秒
     * @return
     */
    bool isInited(int analysisMs) override;

    /**
     * 获取所有Track
     * @return 所有Track
     */
    vector<Track::Ptr> getTracks(bool trackReady = true) const override;

    /**
     * 获取节目总时长
     * @return 节目总时长,单位秒
     */
    float getDuration() const override;

    /**
     * 设置track监听器
     */
    void setTrackListener(TrackListener *listener);

protected:
    void addTrack(const Track::Ptr &track) override;
    void addTrackCompleted() override;
    void resetTracks() override;

protected:
    float _fDuration = 0;
    Ticker _ticker;
    AudioTrack::Ptr _audioTrack;
    VideoTrack::Ptr _videoTrack;
    TrackListener *_listener = nullptr;
};

} /* namespace mediakit */

#endif /* SRC_PLAYER_PLAYERBASE_H_ */