mirror of
https://github.com/ZLMediaKit/ZLMediaKit.git
synced 2024-11-23 19:20:53 +08:00
534 lines
18 KiB
C++
534 lines
18 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/xiongziliang/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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#include <math.h>
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#include "MediaSource.h"
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#include "Record/MP4Reader.h"
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#include "Util/util.h"
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#include "Network/sockutil.h"
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#include "Network/TcpSession.h"
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using namespace toolkit;
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namespace mediakit {
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recursive_mutex MediaSource::g_mtxMediaSrc;
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MediaSource::SchemaVhostAppStreamMap MediaSource::g_mapMediaSrc;
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MediaSource::MediaSource(const string &strSchema, const string &strVhost, const string &strApp, const string &strId) :
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_strSchema(strSchema), _strApp(strApp), _strId(strId) {
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if (strVhost.empty()) {
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_strVhost = DEFAULT_VHOST;
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} else {
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_strVhost = strVhost;
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}
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}
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MediaSource::~MediaSource() {
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unregist();
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}
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const string& MediaSource::getSchema() const {
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return _strSchema;
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}
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const string& MediaSource::getVhost() const {
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return _strVhost;
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}
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const string& MediaSource::getApp() const {
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//获取该源的id
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return _strApp;
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}
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const string& MediaSource::getId() const {
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return _strId;
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}
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vector<Track::Ptr> MediaSource::getTracks(bool trackReady) const {
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auto strongPtr = _track_source.lock();
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if(strongPtr){
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return strongPtr->getTracks(trackReady);
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}
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return vector<Track::Ptr>();
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}
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void MediaSource::setTrackSource(const std::weak_ptr<TrackSource> &track_src) {
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_track_source = track_src;
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}
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void MediaSource::setListener(const std::weak_ptr<MediaSourceEvent> &listener){
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_listener = listener;
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}
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const std::weak_ptr<MediaSourceEvent>& MediaSource::getListener() const{
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return _listener;
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}
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int MediaSource::totalReaderCount(){
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auto listener = _listener.lock();
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if(!listener){
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return readerCount();
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}
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return listener->totalReaderCount(*this);
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}
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bool MediaSource::seekTo(uint32_t ui32Stamp) {
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auto listener = _listener.lock();
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if(!listener){
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return false;
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}
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return listener->seekTo(*this,ui32Stamp);
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}
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bool MediaSource::close(bool force) {
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auto listener = _listener.lock();
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if(!listener){
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return false;
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}
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return listener->close(*this,force);
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}
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void MediaSource::onNoneReader(){
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auto listener = _listener.lock();
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if(!listener){
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return;
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}
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if (listener->totalReaderCount(*this) == 0) {
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listener->onNoneReader(*this);
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}
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}
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bool MediaSource::setupRecord(Recorder::type type, bool start, const string &custom_path){
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auto listener = _listener.lock();
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if (!listener) {
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return false;
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}
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return listener->setupRecord(*this, type, start, custom_path);
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}
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bool MediaSource::isRecording(Recorder::type type){
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auto listener = _listener.lock();
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if(!listener){
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return false;
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}
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return listener->isRecording(*this, type);
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}
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void MediaSource::for_each_media(const function<void(const MediaSource::Ptr &src)> &cb) {
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decltype(g_mapMediaSrc) copy;
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{
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//拷贝g_mapMediaSrc后再遍历，考虑到是高频使用的全局单例锁，并且在上锁时会执行回调代码
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//很容易导致多个锁交叉死锁的情况，而且该函数使用频率不高，拷贝开销相对来说是可以接受的
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lock_guard<recursive_mutex> lock(g_mtxMediaSrc);
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copy = g_mapMediaSrc;
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}
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for (auto &pr0 : copy) {
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for (auto &pr1 : pr0.second) {
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for (auto &pr2 : pr1.second) {
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for (auto &pr3 : pr2.second) {
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auto src = pr3.second.lock();
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if(src){
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cb(src);
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}
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}
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}
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}
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}
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}
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template<typename MAP, typename FUNC>
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static bool searchMedia(MAP &map, const string &schema, const string &vhost, const string &app, const string &id, FUNC &&func) {
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auto it0 = map.find(schema);
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if (it0 == map.end()) {
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//未找到协议
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return false;
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}
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auto it1 = it0->second.find(vhost);
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if (it1 == it0->second.end()) {
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//未找到vhost
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return false;
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}
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auto it2 = it1->second.find(app);
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if (it2 == it1->second.end()) {
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//未找到app
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return false;
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}
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auto it3 = it2->second.find(id);
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if (it3 == it2->second.end()) {
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//未找到streamId
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return false;
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}
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return func(it0, it1, it2, it3);
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}
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template<typename MAP, typename IT0, typename IT1, typename IT2>
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static void eraseIfEmpty(MAP &map, IT0 it0, IT1 it1, IT2 it2) {
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if (it2->second.empty()) {
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it1->second.erase(it2);
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if (it1->second.empty()) {
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it0->second.erase(it1);
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if (it0->second.empty()) {
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map.erase(it0);
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}
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}
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}
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};
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void findAsync_l(const MediaInfo &info, const std::shared_ptr<TcpSession> &session, bool retry,
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const function<void(const MediaSource::Ptr &src)> &cb){
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auto src = MediaSource::find(info._schema, info._vhost, info._app, info._streamid, true);
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if(src || !retry){
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cb(src);
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return;
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}
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void *listener_tag = session.get();
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weak_ptr<TcpSession> weakSession = session;
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//广播未找到流,此时可以立即去拉流，这样还来得及
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NoticeCenter::Instance().emitEvent(Broadcast::kBroadcastNotFoundStream,info, static_cast<SockInfo &>(*session));
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//最多等待一定时间，如果这个时间内，流未注册上，那么返回未找到流
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GET_CONFIG(int,maxWaitMS,General::kMaxStreamWaitTimeMS);
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//若干秒后执行等待媒体注册超时回调
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auto onRegistTimeout = session->getPoller()->doDelayTask(maxWaitMS,[cb,listener_tag](){
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//取消监听该事件
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NoticeCenter::Instance().delListener(listener_tag,Broadcast::kBroadcastMediaChanged);
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cb(nullptr);
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return 0;
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});
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auto onRegist = [listener_tag,weakSession,info,cb,onRegistTimeout](BroadcastMediaChangedArgs) {
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auto strongSession = weakSession.lock();
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if(!strongSession) {
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//自己已经销毁
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//取消延时任务，防止多次回调
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onRegistTimeout->cancel();
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//取消事件监听
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NoticeCenter::Instance().delListener(listener_tag,Broadcast::kBroadcastMediaChanged);
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return;
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}
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if (!bRegist ||
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sender.getSchema() != info._schema ||
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sender.getVhost() != info._vhost ||
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sender.getApp() != info._app ||
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sender.getId() != info._streamid) {
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//不是自己感兴趣的事件，忽略之
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return;
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}
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//取消延时任务，防止多次回调
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onRegistTimeout->cancel();
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//取消事件监听
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NoticeCenter::Instance().delListener(listener_tag,Broadcast::kBroadcastMediaChanged);
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//播发器请求的流终于注册上了，切换到自己的线程再回复
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strongSession->async([weakSession,info,cb](){
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auto strongSession = weakSession.lock();
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if(!strongSession) {
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return;
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}
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DebugL << "收到媒体注册事件,回复播放器:" << info._schema << "/" << info._vhost << "/" << info._app << "/" << info._streamid;
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//再找一遍媒体源，一般能找到
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findAsync_l(info,strongSession,false,cb);
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}, false);
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};
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//监听媒体注册事件
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NoticeCenter::Instance().addListener(listener_tag, Broadcast::kBroadcastMediaChanged, onRegist);
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}
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void MediaSource::findAsync(const MediaInfo &info, const std::shared_ptr<TcpSession> &session,const function<void(const Ptr &src)> &cb){
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return findAsync_l(info, session, true, cb);
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}
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MediaSource::Ptr MediaSource::find(const string &schema, const string &vhost_tmp, const string &app, const string &id, bool bMake) {
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string vhost = vhost_tmp;
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if(vhost.empty()){
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vhost = DEFAULT_VHOST;
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}
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GET_CONFIG(bool,enableVhost,General::kEnableVhost);
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if(!enableVhost){
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vhost = DEFAULT_VHOST;
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}
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MediaSource::Ptr ret;
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{
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lock_guard<recursive_mutex> lock(g_mtxMediaSrc);
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//查找某一媒体源，找到后返回
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searchMedia(g_mapMediaSrc, schema, vhost, app, id, [&](SchemaVhostAppStreamMap::iterator &it0,
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VhostAppStreamMap::iterator &it1,
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AppStreamMap::iterator &it2,
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StreamMap::iterator &it3) {
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ret = it3->second.lock();
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if (!ret) {
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//该对象已经销毁
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it2->second.erase(it3);
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eraseIfEmpty(g_mapMediaSrc, it0, it1, it2);
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return false;
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}
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return true;
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});
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}
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if(!ret && bMake){
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//未查找媒体源，则创建一个
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ret = createFromMP4(schema, vhost, app, id);
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}
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return ret;
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}
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void MediaSource::regist() {
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GET_CONFIG(bool,enableVhost,General::kEnableVhost);
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if(!enableVhost){
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_strVhost = DEFAULT_VHOST;
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}
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//注册该源，注册后服务器才能找到该源
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{
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lock_guard<recursive_mutex> lock(g_mtxMediaSrc);
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g_mapMediaSrc[_strSchema][_strVhost][_strApp][_strId] = shared_from_this();
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}
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_StrPrinter codec_info;
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auto tracks = getTracks(true);
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for(auto &track : tracks) {
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auto codec_type = track->getTrackType();
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codec_info << track->getCodecName();
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switch (codec_type) {
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case TrackAudio : {
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auto audio_track = dynamic_pointer_cast<AudioTrack>(track);
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codec_info << "["
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<< audio_track->getAudioSampleRate() << "/"
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<< audio_track->getAudioChannel() << "/"
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<< audio_track->getAudioSampleBit() << "] ";
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break;
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}
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case TrackVideo : {
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auto video_track = dynamic_pointer_cast<VideoTrack>(track);
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codec_info << "["
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<< video_track->getVideoWidth() << "/"
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<< video_track->getVideoHeight() << "/"
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<< round(video_track->getVideoFps()) << "] ";
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break;
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}
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default:
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break;
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}
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}
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InfoL << _strSchema << " " << _strVhost << " " << _strApp << " " << _strId << " " << codec_info;
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NoticeCenter::Instance().emitEvent(Broadcast::kBroadcastMediaChanged, true, *this);
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}
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//反注册该源
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bool MediaSource::unregist() {
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bool ret;
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{
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lock_guard<recursive_mutex> lock(g_mtxMediaSrc);
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ret = searchMedia(g_mapMediaSrc, _strSchema, _strVhost, _strApp, _strId,
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[&](SchemaVhostAppStreamMap::iterator &it0,
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VhostAppStreamMap::iterator &it1,
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AppStreamMap::iterator &it2,
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StreamMap::iterator &it3) {
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auto strongMedia = it3->second.lock();
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if (strongMedia && this != strongMedia.get()) {
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//不是自己,不允许反注册
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return false;
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}
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it2->second.erase(it3);
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eraseIfEmpty(g_mapMediaSrc, it0, it1, it2);
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return true;
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});
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}
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if(ret){
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InfoL << _strSchema << " " << _strVhost << " " << _strApp << " " << _strId;
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NoticeCenter::Instance().emitEvent(Broadcast::kBroadcastMediaChanged, false, *this);
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}
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return ret;
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}
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/////////////////////////////////////MediaInfo//////////////////////////////////////
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void MediaInfo::parse(const string &url){
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//string url = "rtsp://127.0.0.1:8554/live/id?key=val&a=1&&b=2&vhost=vhost.com";
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auto schema_pos = url.find("://");
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if(schema_pos != string::npos){
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_schema = url.substr(0,schema_pos);
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}else{
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schema_pos = -3;
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}
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auto split_vec = split(url.substr(schema_pos + 3),"/");
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if(split_vec.size() > 0){
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auto vhost = split_vec[0];
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auto pos = vhost.find(":");
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if(pos != string::npos){
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_host = _vhost = vhost.substr(0,pos);
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_port = vhost.substr(pos + 1);
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} else{
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_host = _vhost = vhost;
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}
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if(_vhost == "localhost" || INADDR_NONE != inet_addr(_vhost.data())){
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//如果访问的是localhost或ip，那么则为默认虚拟主机
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_vhost = DEFAULT_VHOST;
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}
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}
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if(split_vec.size() > 1){
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_app = split_vec[1];
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}
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if(split_vec.size() > 2){
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string steamid;
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for(int i = 2 ; i < split_vec.size() ; ++i){
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steamid.append(split_vec[i] + "/");
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}
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if(steamid.back() == '/'){
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steamid.pop_back();
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}
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auto pos = steamid.find("?");
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if(pos != string::npos){
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_streamid = steamid.substr(0,pos);
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_param_strs = steamid.substr(pos + 1);
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auto params = Parser::parseArgs(_param_strs);
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if(params.find(VHOST_KEY) != params.end()){
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_vhost = params[VHOST_KEY];
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}
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} else{
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_streamid = steamid;
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}
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}
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GET_CONFIG(bool,enableVhost,General::kEnableVhost);
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if(!enableVhost || _vhost.empty()){
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//如果关闭虚拟主机或者虚拟主机为空，则设置虚拟主机为默认
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_vhost = DEFAULT_VHOST;
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}
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}
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/////////////////////////////////////MediaSourceEvent//////////////////////////////////////
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void MediaSourceEvent::onNoneReader(MediaSource &sender){
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GET_CONFIG(string, recordApp, Record::kAppName);
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GET_CONFIG(int, stream_none_reader_delay, General::kStreamNoneReaderDelayMS);
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//如果mp4点播, 无人观看时我们强制关闭点播
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bool is_mp4_vod = sender.getApp() == recordApp;
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//无人观看mp4点播时，3秒后自动关闭
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auto close_delay = is_mp4_vod ? 3.0 : stream_none_reader_delay / 1000.0;
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//没有任何人观看该视频源，表明该源可以关闭了
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weak_ptr<MediaSource> weakSender = sender.shared_from_this();
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_async_close_timer = std::make_shared<Timer>(close_delay, [weakSender,is_mp4_vod]() {
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auto strongSender = weakSender.lock();
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if (!strongSender) {
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//对象已经销毁
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return false;
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}
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if (strongSender->totalReaderCount() != 0) {
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//还有人消费
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return false;
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}
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if(!is_mp4_vod){
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//直播时触发无人观看事件，让开发者自行选择是否关闭
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WarnL << "无人观看事件:"
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<< strongSender->getSchema() << "/"
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<< strongSender->getVhost() << "/"
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<< strongSender->getApp() << "/"
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<< strongSender->getId();
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NoticeCenter::Instance().emitEvent(Broadcast::kBroadcastStreamNoneReader, *strongSender);
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}else{
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//这个是mp4点播，我们自动关闭
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WarnL << "MP4点播无人观看,自动关闭:"
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<< strongSender->getSchema() << "/"
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<< strongSender->getVhost() << "/"
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<< strongSender->getApp() << "/"
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<< strongSender->getId();
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strongSender->close(false);
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}
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return false;
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}, nullptr);
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}
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MediaSource::Ptr MediaSource::createFromMP4(const string &schema, const string &vhost, const string &app, const string &stream, const string &filePath , bool checkApp){
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GET_CONFIG(string, appName, Record::kAppName);
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if (checkApp && app != appName) {
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return nullptr;
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}
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#ifdef ENABLE_MP4
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try {
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MP4Reader::Ptr pReader(new MP4Reader(vhost, app, stream, filePath));
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pReader->startReadMP4();
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return MediaSource::find(schema, vhost, app, stream, false);
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} catch (std::exception &ex) {
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WarnL << ex.what();
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return nullptr;
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}
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#else
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WarnL << "创建MP4点播失败，请编译时打开\"ENABLE_MP4\"选项";
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return nullptr;
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#endif //ENABLE_MP4
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}
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static bool isFlushAble_default(bool is_audio, uint32_t last_stamp, uint32_t new_stamp, int cache_size) {
|
||
if (new_stamp < last_stamp) {
|
||
//时间戳回退(可能seek中)
|
||
return true;
|
||
}
|
||
|
||
if (!is_audio) {
|
||
//这是视频,时间戳发送变化或者缓存超过1024个
|
||
return last_stamp != new_stamp || cache_size >= 1024;
|
||
}
|
||
|
||
//这是音频,缓存超过100ms或者缓存个数超过10个
|
||
return new_stamp > last_stamp + 100 || cache_size > 10;
|
||
}
|
||
|
||
static bool isFlushAble_merge(bool is_audio, uint32_t last_stamp, uint32_t new_stamp, int cache_size, int merge_ms) {
|
||
if (new_stamp < last_stamp) {
|
||
//时间戳回退(可能seek中)
|
||
return true;
|
||
}
|
||
|
||
if(new_stamp > last_stamp + merge_ms){
|
||
//时间戳增量超过合并写阈值
|
||
return true;
|
||
}
|
||
|
||
if (!is_audio) {
|
||
//这是视频,缓存数超过1024个,这个逻辑用于避免时间戳异常的流导致的内存暴增问题
|
||
//而且sendmsg接口一般最多只能发送1024个数据包
|
||
return cache_size >= 1024;
|
||
}
|
||
|
||
//这是音频，音频缓存超过20个
|
||
return cache_size > 20;
|
||
}
|
||
|
||
bool FlushPolicy::isFlushAble(uint32_t new_stamp, int cache_size) {
|
||
bool ret = false;
|
||
GET_CONFIG(int, mergeWriteMS, General::kMergeWriteMS);
|
||
if (mergeWriteMS <= 0) {
|
||
//关闭了合并写或者合并写阈值小于等于0
|
||
ret = isFlushAble_default(_is_audio, _last_stamp, new_stamp, cache_size);
|
||
} else {
|
||
ret = isFlushAble_merge(_is_audio, _last_stamp, new_stamp, cache_size, mergeWriteMS);
|
||
}
|
||
|
||
if (ret) {
|
||
// DebugL << _is_audio << " " << _last_stamp << " " << new_stamp;
|
||
_last_stamp = new_stamp;
|
||
}
|
||
return ret;
|
||
}
|
||
|
||
} /* namespace mediakit */ |