mirror of
https://github.com/ZLMediaKit/ZLMediaKit.git
synced 2024-11-25 12:11:36 +08:00
395 lines
13 KiB
C++
395 lines
13 KiB
C++
/*
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* Copyright (c) 2016 The ZLMediaKit project authors. All Rights Reserved.
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*
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* This file is part of ZLMediaKit(https://github.com/xia-chu/ZLMediaKit).
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*
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* Use of this source code is governed by MIT license that can be found in the
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* LICENSE file in the root of the source tree. All contributing project authors
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* may be found in the AUTHORS file in the root of the source tree.
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*/
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#ifndef ZLMEDIAKIT_MEDIASOURCE_H
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#define ZLMEDIAKIT_MEDIASOURCE_H
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#include <mutex>
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#include <string>
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#include <atomic>
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#include <memory>
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#include <functional>
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#include <unordered_map>
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#include "Common/config.h"
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#include "Common/Parser.h"
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#include "Util/logger.h"
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#include "Util/TimeTicker.h"
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#include "Util/NoticeCenter.h"
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#include "Util/List.h"
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#include "Network/Socket.h"
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#include "Rtsp/Rtsp.h"
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#include "Rtmp/Rtmp.h"
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#include "Extension/Track.h"
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#include "Record/Recorder.h"
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using namespace std;
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using namespace toolkit;
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namespace toolkit{
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class Session;
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}// namespace toolkit
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namespace mediakit {
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enum class MediaOriginType : uint8_t {
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unknown = 0,
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rtmp_push ,
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rtsp_push,
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rtp_push,
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pull,
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ffmpeg_pull,
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mp4_vod,
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device_chn,
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rtc_push,
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};
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string getOriginTypeString(MediaOriginType type);
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class MediaSource;
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class MediaSourceEvent{
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public:
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friend class MediaSource;
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MediaSourceEvent(){};
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virtual ~MediaSourceEvent(){};
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// 获取媒体源类型
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virtual MediaOriginType getOriginType(MediaSource &sender) const { return MediaOriginType::unknown; }
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// 获取媒体源url或者文件路径
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virtual string getOriginUrl(MediaSource &sender) const;
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// 获取媒体源客户端相关信息
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virtual std::shared_ptr<SockInfo> getOriginSock(MediaSource &sender) const { return nullptr; }
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// 通知拖动进度条
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virtual bool seekTo(MediaSource &sender, uint32_t stamp) { return false; }
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// 通知暂停或恢复
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virtual bool pause(MediaSource &sender, bool pause) { return false; }
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// 通知倍数
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virtual bool speed(MediaSource &sender, float speed) { return false; }
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// 通知其停止产生流
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virtual bool close(MediaSource &sender, bool force) { return false; }
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// 获取观看总人数
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virtual int totalReaderCount(MediaSource &sender) = 0;
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// 通知观看人数变化
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virtual void onReaderChanged(MediaSource &sender, int size);
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//流注册或注销事件
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virtual void onRegist(MediaSource &sender, bool regist) {};
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////////////////////////仅供MultiMediaSourceMuxer对象继承////////////////////////
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// 开启或关闭录制
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virtual bool setupRecord(MediaSource &sender, Recorder::type type, bool start, const string &custom_path, size_t max_second) { return false; };
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// 获取录制状态
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virtual bool isRecording(MediaSource &sender, Recorder::type type) { return false; };
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// 获取所有track相关信息
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virtual vector<Track::Ptr> getMediaTracks(MediaSource &sender, bool trackReady = true) const { return vector<Track::Ptr>(); };
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// 开始发送ps-rtp
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virtual void startSendRtp(MediaSource &sender, const string &dst_url, uint16_t dst_port, const string &ssrc, bool is_udp, uint16_t src_port, const function<void(uint16_t local_port, const SockException &ex)> &cb) { cb(0, SockException(Err_other, "not implemented"));};
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// 停止发送ps-rtp
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virtual bool stopSendRtp(MediaSource &sender, const string &ssrc) {return false; }
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private:
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Timer::Ptr _async_close_timer;
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};
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//该对象用于拦截感兴趣的MediaSourceEvent事件
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class MediaSourceEventInterceptor : public MediaSourceEvent{
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public:
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MediaSourceEventInterceptor(){}
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~MediaSourceEventInterceptor() override {}
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void setDelegate(const std::weak_ptr<MediaSourceEvent> &listener);
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std::shared_ptr<MediaSourceEvent> getDelegate() const;
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MediaOriginType getOriginType(MediaSource &sender) const override;
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string getOriginUrl(MediaSource &sender) const override;
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std::shared_ptr<SockInfo> getOriginSock(MediaSource &sender) const override;
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bool seekTo(MediaSource &sender, uint32_t stamp) override;
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bool pause(MediaSource &sender, bool pause) override;
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bool speed(MediaSource &sender, float speed) override;
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bool close(MediaSource &sender, bool force) override;
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int totalReaderCount(MediaSource &sender) override;
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void onReaderChanged(MediaSource &sender, int size) override;
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void onRegist(MediaSource &sender, bool regist) override;
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bool setupRecord(MediaSource &sender, Recorder::type type, bool start, const string &custom_path, size_t max_second) override;
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bool isRecording(MediaSource &sender, Recorder::type type) override;
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vector<Track::Ptr> getMediaTracks(MediaSource &sender, bool trackReady = true) const override;
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void startSendRtp(MediaSource &sender, const string &dst_url, uint16_t dst_port, const string &ssrc, bool is_udp, uint16_t src_port, const function<void(uint16_t local_port, const SockException &ex)> &cb) override;
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bool stopSendRtp(MediaSource &sender, const string &ssrc) override;
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private:
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std::weak_ptr<MediaSourceEvent> _listener;
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};
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/**
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* 解析url获取媒体相关信息
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*/
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class MediaInfo{
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public:
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~MediaInfo() {}
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MediaInfo() {}
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MediaInfo(const string &url) { parse(url); }
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void parse(const string &url);
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public:
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string _full_url;
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string _schema;
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string _host;
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string _port;
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string _vhost;
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string _app;
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string _streamid;
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string _param_strs;
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};
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class BytesSpeed {
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public:
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BytesSpeed() = default;
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~BytesSpeed() = default;
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/**
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* 添加统计字节
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*/
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BytesSpeed& operator += (size_t bytes) {
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_bytes += bytes;
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if (_bytes > 1024 * 1024) {
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//数据大于1MB就计算一次网速
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computeSpeed();
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}
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return *this;
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}
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/**
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* 获取速度，单位bytes/s
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*/
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int getSpeed() {
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if (_ticker.elapsedTime() < 1000) {
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//获取频率小于1秒，那么返回上次计算结果
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return _speed;
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}
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return computeSpeed();
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}
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private:
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int computeSpeed() {
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auto elapsed = _ticker.elapsedTime();
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if (!elapsed) {
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return _speed;
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}
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_speed = (int)(_bytes * 1000 / elapsed);
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_ticker.resetTime();
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_bytes = 0;
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return _speed;
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}
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private:
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int _speed = 0;
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size_t _bytes = 0;
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Ticker _ticker;
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};
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/**
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* 媒体源，任何rtsp/rtmp的直播流都源自该对象
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*/
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class MediaSource: public TrackSource, public enable_shared_from_this<MediaSource> {
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public:
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static MediaSource * const NullMediaSource;
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using Ptr = std::shared_ptr<MediaSource>;
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using StreamMap = unordered_map<string/*strema_id*/, weak_ptr<MediaSource> >;
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using AppStreamMap = unordered_map<string/*app*/, StreamMap>;
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using VhostAppStreamMap = unordered_map<string/*vhost*/, AppStreamMap>;
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using SchemaVhostAppStreamMap = unordered_map<string/*schema*/, VhostAppStreamMap>;
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MediaSource(const string &schema, const string &vhost, const string &app, const string &stream_id) ;
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virtual ~MediaSource();
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////////////////获取MediaSource相关信息////////////////
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// 获取协议类型
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const string& getSchema() const;
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// 虚拟主机
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const string& getVhost() const;
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// 应用名
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const string& getApp() const;
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// 流id
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const string& getId() const;
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//获取对象所有权
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std::shared_ptr<void> getOwnership();
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// 获取所有Track
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vector<Track::Ptr> getTracks(bool ready = true) const override;
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// 获取流当前时间戳
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virtual uint32_t getTimeStamp(TrackType type) { return 0; };
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// 设置时间戳
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virtual void setTimeStamp(uint32_t stamp) {};
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// 获取数据速率，单位bytes/s
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int getBytesSpeed(TrackType type = TrackInvalid);
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// 获取流创建GMT unix时间戳，单位秒
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uint64_t getCreateStamp() const;
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// 获取流上线时间，单位秒
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uint64_t getAliveSecond() const;
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////////////////MediaSourceEvent相关接口实现////////////////
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// 设置监听者
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virtual void setListener(const std::weak_ptr<MediaSourceEvent> &listener);
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// 获取监听者
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std::weak_ptr<MediaSourceEvent> getListener(bool next = false) const;
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// 本协议获取观看者个数，可能返回本协议的观看人数，也可能返回总人数
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virtual int readerCount() = 0;
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// 观看者个数，包括(hls/rtsp/rtmp)
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virtual int totalReaderCount();
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// 获取媒体源类型
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MediaOriginType getOriginType() const;
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// 获取媒体源url或者文件路径
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string getOriginUrl() const;
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// 获取媒体源客户端相关信息
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std::shared_ptr<SockInfo> getOriginSock() const;
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// 拖动进度条
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bool seekTo(uint32_t stamp);
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//暂停
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bool pause(bool pause);
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//倍数播放
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bool speed(float speed);
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// 关闭该流
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bool close(bool force);
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// 该流观看人数变化
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void onReaderChanged(int size);
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// 开启或关闭录制
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bool setupRecord(Recorder::type type, bool start, const string &custom_path, size_t max_second);
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// 获取录制状态
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bool isRecording(Recorder::type type);
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// 开始发送ps-rtp
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void startSendRtp(const string &dst_url, uint16_t dst_port, const string &ssrc, bool is_udp, uint16_t src_port, const function<void(uint16_t local_port, const SockException &ex)> &cb);
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// 停止发送ps-rtp
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bool stopSendRtp(const string &ssrc);
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////////////////static方法，查找或生成MediaSource////////////////
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// 同步查找流
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static Ptr find(const string &schema, const string &vhost, const string &app, const string &id, bool from_mp4 = false);
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// 忽略类型，同步查找流，可能返回rtmp/rtsp/hls类型
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static Ptr find(const string &vhost, const string &app, const string &stream_id, bool from_mp4 = false);
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// 异步查找流
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static void findAsync(const MediaInfo &info, const std::shared_ptr<Session> &session, const function<void(const Ptr &src)> &cb);
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// 遍历所有流
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static void for_each_media(const function<void(const Ptr &src)> &cb, const string &schema = "", const string &vhost = "", const string &app = "", const string &stream = "");
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// 从mp4文件生成MediaSource
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static MediaSource::Ptr createFromMP4(const string &schema, const string &vhost, const string &app, const string &stream, const string &file_path = "", bool check_app = true);
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protected:
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//媒体注册
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void regist();
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private:
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//媒体注销
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bool unregist();
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//触发媒体事件
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void emitEvent(bool regist);
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protected:
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BytesSpeed _speed[TrackMax];
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private:
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atomic_flag _owned { false };
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time_t _create_stamp;
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Ticker _ticker;
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string _schema;
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string _vhost;
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string _app;
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string _stream_id;
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std::weak_ptr<MediaSourceEvent> _listener;
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//对象个数统计
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ObjectStatistic<MediaSource> _statistic;
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};
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///缓存刷新策略类
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class FlushPolicy {
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public:
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FlushPolicy() = default;
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~FlushPolicy() = default;
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bool isFlushAble(bool is_video, bool is_key, uint64_t new_stamp, size_t cache_size);
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private:
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uint64_t _last_stamp[2] = {0, 0};
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};
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/// 合并写缓存模板
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/// \tparam packet 包类型
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/// \tparam policy 刷新缓存策略
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/// \tparam packet_list 包缓存类型
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template<typename packet, typename policy = FlushPolicy, typename packet_list = List<std::shared_ptr<packet> > >
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class PacketCache {
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public:
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PacketCache(){
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_cache = std::make_shared<packet_list>();
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}
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virtual ~PacketCache() = default;
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void inputPacket(uint64_t stamp, bool is_video, std::shared_ptr<packet> pkt, bool key_pos) {
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bool flush = flushImmediatelyWhenCloseMerge();
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if (!flush && _policy.isFlushAble(is_video, key_pos, stamp, _cache->size())) {
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flushAll();
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}
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//追加数据到最后
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_cache->emplace_back(std::move(pkt));
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if (key_pos) {
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_key_pos = key_pos;
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}
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if (flush) {
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flushAll();
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}
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}
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virtual void clearCache() {
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_cache->clear();
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}
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virtual void onFlush(std::shared_ptr<packet_list>, bool key_pos) = 0;
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private:
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void flushAll() {
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if (_cache->empty()) {
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return;
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}
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onFlush(std::move(_cache), _key_pos);
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_cache = std::make_shared<packet_list>();
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_key_pos = false;
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}
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bool flushImmediatelyWhenCloseMerge() {
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//一般的协议关闭合并写时，立即刷新缓存，这样可以减少一帧的延时，但是rtp例外
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//因为rtp的包很小，一个RtpPacket包中也不是完整的一帧图像，所以在关闭合并写时，
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//还是有必要缓冲一帧的rtp(也就是时间戳相同的rtp)再输出，这样虽然会增加一帧的延时
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//但是却对性能提升很大，这样做还是比较划算的
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GET_CONFIG(int, mergeWriteMS, General::kMergeWriteMS);
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return std::is_same<packet, RtpPacket>::value ? false : (mergeWriteMS <= 0);
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}
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private:
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bool _key_pos = false;
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policy _policy;
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std::shared_ptr<packet_list> _cache;
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};
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} /* namespace mediakit */
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#endif //ZLMEDIAKIT_MEDIASOURCE_H
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