mirror of
https://github.com/ZLMediaKit/ZLMediaKit.git
synced 2024-11-25 20:27:34 +08:00
359 lines
14 KiB
C++
359 lines
14 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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#include "FFmpegSource.h"
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#include "Common/config.h"
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#include "Common/MediaSource.h"
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#include "Util/File.h"
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#include "System.h"
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#include "Thread/WorkThreadPool.h"
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#include "Network/sockutil.h"
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using namespace std;
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using namespace toolkit;
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using namespace mediakit;
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namespace FFmpeg {
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#define FFmpeg_FIELD "ffmpeg."
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const string kBin = FFmpeg_FIELD"bin";
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const string kCmd = FFmpeg_FIELD"cmd";
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const string kLog = FFmpeg_FIELD"log";
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const string kSnap = FFmpeg_FIELD"snap";
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const string kRestartSec = FFmpeg_FIELD"restart_sec";
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onceToken token([]() {
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#ifdef _WIN32
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string ffmpeg_bin = trim(System::execute("where ffmpeg"));
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#else
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string ffmpeg_bin = trim(System::execute("which ffmpeg"));
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#endif
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//默认ffmpeg命令路径为环境变量中路径
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mINI::Instance()[kBin] = ffmpeg_bin.empty() ? "ffmpeg" : ffmpeg_bin;
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//ffmpeg日志保存路径
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mINI::Instance()[kLog] = "./ffmpeg/ffmpeg.log";
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mINI::Instance()[kCmd] = "%s -re -i %s -c:a aac -strict -2 -ar 44100 -ab 48k -c:v libx264 -f flv %s";
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mINI::Instance()[kSnap] = "%s -i %s -y -f mjpeg -frames:v 1 %s";
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mINI::Instance()[kRestartSec] = 0;
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});
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}
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FFmpegSource::FFmpegSource() {
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_poller = EventPollerPool::Instance().getPoller();
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}
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FFmpegSource::~FFmpegSource() {
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DebugL;
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}
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static bool is_local_ip(const string &ip){
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if (ip == "127.0.0.1" || ip == "localhost") {
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return true;
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}
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auto ips = SockUtil::getInterfaceList();
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for (auto &obj : ips) {
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if (ip == obj["ip"]) {
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return true;
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}
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}
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return false;
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}
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void FFmpegSource::setupRecordFlag(bool enable_hls, bool enable_mp4){
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_enable_hls = enable_hls;
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_enable_mp4 = enable_mp4;
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}
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void FFmpegSource::play(const string &ffmpeg_cmd_key, const string &src_url,const string &dst_url,int timeout_ms,const onPlay &cb) {
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GET_CONFIG(string,ffmpeg_bin,FFmpeg::kBin);
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GET_CONFIG(string,ffmpeg_cmd_default,FFmpeg::kCmd);
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GET_CONFIG(string,ffmpeg_log,FFmpeg::kLog);
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_src_url = src_url;
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_dst_url = dst_url;
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_ffmpeg_cmd_key = ffmpeg_cmd_key;
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try {
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_media_info.parse(dst_url);
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} catch (std::exception &ex) {
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cb(SockException(Err_other, ex.what()));
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return;
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}
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auto ffmpeg_cmd = ffmpeg_cmd_default;
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if (!ffmpeg_cmd_key.empty()) {
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auto cmd_it = mINI::Instance().find(ffmpeg_cmd_key);
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if (cmd_it != mINI::Instance().end()) {
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ffmpeg_cmd = cmd_it->second;
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} else{
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WarnL << "配置文件中,ffmpeg命令模板(" << ffmpeg_cmd_key << ")不存在,已采用默认模板(" << ffmpeg_cmd_default << ")";
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}
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}
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char cmd[2048] = {0};
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snprintf(cmd, sizeof(cmd), ffmpeg_cmd.data(), File::absolutePath("", ffmpeg_bin).data(), src_url.data(), dst_url.data());
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auto log_file = ffmpeg_log.empty() ? "" : File::absolutePath("", ffmpeg_log);
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_process.run(cmd, log_file);
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InfoL << cmd;
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if (is_local_ip(_media_info.host)) {
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//推流给自己的，通过判断流是否注册上来判断是否正常
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if (_media_info.schema != RTSP_SCHEMA && _media_info.schema != RTMP_SCHEMA) {
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cb(SockException(Err_other,"本服务只支持rtmp/rtsp推流"));
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return;
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}
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weak_ptr<FFmpegSource> weakSelf = shared_from_this();
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findAsync(timeout_ms,[cb,weakSelf,timeout_ms](const MediaSource::Ptr &src){
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auto strongSelf = weakSelf.lock();
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if(!strongSelf){
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//自己已经销毁
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return;
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}
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if(src){
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//推流给自己成功
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cb(SockException());
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strongSelf->onGetMediaSource(src);
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strongSelf->startTimer(timeout_ms);
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return;
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}
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//推流失败
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if(!strongSelf->_process.wait(false)){
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//ffmpeg进程已经退出
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cb(SockException(Err_other,StrPrinter << "ffmpeg已经退出,exit code = " << strongSelf->_process.exit_code()));
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return;
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}
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//ffmpeg进程还在线，但是等待推流超时
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cb(SockException(Err_other,"等待超时"));
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});
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} else{
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//推流给其他服务器的，通过判断FFmpeg进程是否在线判断是否成功
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weak_ptr<FFmpegSource> weakSelf = shared_from_this();
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_timer = std::make_shared<Timer>(timeout_ms / 1000.0f,[weakSelf,cb,timeout_ms](){
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auto strongSelf = weakSelf.lock();
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if(!strongSelf){
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//自身已经销毁
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return false;
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}
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//FFmpeg还在线，那么我们认为推流成功
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if(strongSelf->_process.wait(false)){
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cb(SockException());
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strongSelf->startTimer(timeout_ms);
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return false;
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}
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//ffmpeg进程已经退出
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cb(SockException(Err_other,StrPrinter << "ffmpeg已经退出,exit code = " << strongSelf->_process.exit_code()));
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return false;
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},_poller);
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}
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}
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void FFmpegSource::findAsync(int maxWaitMS, const function<void(const MediaSource::Ptr &src)> &cb) {
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auto src = MediaSource::find(_media_info.schema,
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_media_info.vhost,
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_media_info.app,
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_media_info.stream);
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if(src || !maxWaitMS){
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cb(src);
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return;
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}
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void *listener_tag = this;
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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 = _poller->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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weak_ptr<FFmpegSource> weakSelf = shared_from_this();
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auto onRegist = [listener_tag,weakSelf,cb,onRegistTimeout](BroadcastMediaChangedArgs) {
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auto strongSelf = weakSelf.lock();
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if(!strongSelf) {
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//本身已经销毁，取消延时任务
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onRegistTimeout->cancel();
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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() != strongSelf->_media_info.schema ||
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!equalMediaTuple(sender.getMediaTuple(), strongSelf->_media_info)) {
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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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//查找的流终于注册上了；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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//切换到自己的线程再回复
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strongSelf->_poller->async([weakSelf,cb](){
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auto strongSelf = weakSelf.lock();
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if(!strongSelf) {
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return;
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}
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//再找一遍媒体源，一般能找到
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strongSelf->findAsync(0,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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/**
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* 定时检查媒体是否在线
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*/
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void FFmpegSource::startTimer(int timeout_ms) {
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weak_ptr<FFmpegSource> weakSelf = shared_from_this();
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GET_CONFIG(uint64_t,ffmpeg_restart_sec,FFmpeg::kRestartSec);
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_timer = std::make_shared<Timer>(1.0f, [weakSelf, timeout_ms]() {
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auto strongSelf = weakSelf.lock();
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if (!strongSelf) {
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//自身已经销毁
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return false;
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}
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bool needRestart = ffmpeg_restart_sec > 0 && strongSelf->_replay_ticker.elapsedTime() > ffmpeg_restart_sec * 1000;
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if (is_local_ip(strongSelf->_media_info.host)) {
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//推流给自己的，我们通过检查是否已经注册来判断FFmpeg是否工作正常
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strongSelf->findAsync(0, [&](const MediaSource::Ptr &src) {
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//同步查找流
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if (!src || needRestart) {
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if(needRestart){
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strongSelf->_replay_ticker.resetTime();
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if(strongSelf->_process.wait(false)){
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//FFmpeg进程还在运行，超时就关闭它
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strongSelf->_process.kill(2000);
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}
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InfoL << "FFmpeg即将重启, 将会继续拉流 " << strongSelf->_src_url;
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}
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//流不在线，重新拉流, 这里原先是10秒超时，实际发现10秒不够，改成20秒了
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if(strongSelf->_replay_ticker.elapsedTime() > 20 * 1000){
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//上次重试时间超过10秒，那么再重试FFmpeg拉流
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strongSelf->_replay_ticker.resetTime();
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strongSelf->play(strongSelf->_ffmpeg_cmd_key, strongSelf->_src_url, strongSelf->_dst_url, timeout_ms, [](const SockException &) {});
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}
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}
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});
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} else {
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//推流给其他服务器的，我们通过判断FFmpeg进程是否在线，如果FFmpeg推流中断，那么它应该会自动退出
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if (!strongSelf->_process.wait(false) || needRestart) {
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if(needRestart){
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strongSelf->_replay_ticker.resetTime();
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if(strongSelf->_process.wait(false)){
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//FFmpeg进程还在运行，超时就关闭它
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strongSelf->_process.kill(2000);
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}
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InfoL << "FFmpeg即将重启, 将会继续拉流 " << strongSelf->_src_url;
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}
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//ffmpeg不在线，重新拉流
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strongSelf->play(strongSelf->_ffmpeg_cmd_key, strongSelf->_src_url, strongSelf->_dst_url, timeout_ms, [weakSelf](const SockException &ex) {
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if(!ex){
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//没有错误
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return;
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}
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auto strongSelf = weakSelf.lock();
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if (!strongSelf) {
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//自身已经销毁
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return;
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}
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//上次重试时间超过10秒，那么再重试FFmpeg拉流
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strongSelf->startTimer(10 * 1000);
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});
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}
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}
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return true;
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}, _poller);
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}
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void FFmpegSource::setOnClose(const function<void()> &cb){
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_onClose = cb;
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}
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bool FFmpegSource::close(MediaSource &sender) {
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auto listener = getDelegate();
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if (listener && !listener->close(sender)) {
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//关闭失败
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return false;
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}
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//该流无人观看，我们停止吧
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if (_onClose) {
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_onClose();
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}
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return true;
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}
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MediaOriginType FFmpegSource::getOriginType(MediaSource &sender) const{
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return MediaOriginType::ffmpeg_pull;
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}
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string FFmpegSource::getOriginUrl(MediaSource &sender) const{
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return _src_url;
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}
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std::shared_ptr<SockInfo> FFmpegSource::getOriginSock(MediaSource &sender) const {
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return nullptr;
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}
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void FFmpegSource::onGetMediaSource(const MediaSource::Ptr &src) {
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auto listener = src->getListener(true);
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if (listener.lock().get() != this) {
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//防止多次进入onGetMediaSource函数导致无限递归调用的bug
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setDelegate(listener);
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src->setListener(shared_from_this());
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if (_enable_hls) {
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src->setupRecord(Recorder::type_hls, true, "", 0);
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}
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if (_enable_mp4) {
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src->setupRecord(Recorder::type_mp4, true, "", 0);
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}
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}
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}
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void FFmpegSnap::makeSnap(const string &play_url, const string &save_path, float timeout_sec, const onSnap &cb) {
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GET_CONFIG(string,ffmpeg_bin,FFmpeg::kBin);
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GET_CONFIG(string,ffmpeg_snap,FFmpeg::kSnap);
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GET_CONFIG(string,ffmpeg_log,FFmpeg::kLog);
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Ticker ticker;
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WorkThreadPool::Instance().getPoller()->async([timeout_sec, play_url,save_path,cb, ticker](){
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auto elapsed_ms = ticker.elapsedTime();
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if (elapsed_ms > timeout_sec * 1000) {
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//超时，后台线程负载太高，当代太久才启动该任务
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cb(false, "wait work poller schedule snap task timeout");
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return;
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}
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char cmd[2048] = { 0 };
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snprintf(cmd, sizeof(cmd), ffmpeg_snap.data(), File::absolutePath("", ffmpeg_bin).data(), play_url.data(), save_path.data());
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std::shared_ptr<Process> process = std::make_shared<Process>();
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auto log_file = ffmpeg_log.empty() ? ffmpeg_log : File::absolutePath("", ffmpeg_log);
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process->run(cmd, log_file);
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//定时器延时应该减去后台任务启动的延时
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auto delayTask = EventPollerPool::Instance().getPoller()->doDelayTask(
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(uint64_t)(timeout_sec * 1000 - elapsed_ms), [process, cb, log_file, save_path]() {
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if (process->wait(false)) {
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// FFmpeg进程还在运行，超时就关闭它
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process->kill(2000);
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}
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return 0;
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});
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//等待FFmpeg进程退出
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process->wait(true);
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// FFmpeg进程退出了可以取消定时器了
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delayTask->cancel();
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//执行回调函数
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bool success = process->exit_code() == 0 && File::fileSize(save_path.data());
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cb(success, (!success && !log_file.empty()) ? File::loadFile(log_file.data()) : "");
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});
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}
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