ZLMediaKit/server/FFmpegSource.cpp

251 lines
9.5 KiB
C++
Raw Blame History

This file contains ambiguous Unicode characters

This file contains Unicode characters that might be confused with other characters. If you think that this is intentional, you can safely ignore this warning. Use the Escape button to reveal them.

/*
* MIT License
*
* Copyright (c) 2016-2019 xiongziliang <771730766@qq.com>
*
* This file is part of ZLMediaKit(https://github.com/xiongziliang/ZLMediaKit).
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#include "FFmpegSource.h"
#include "Common/config.h"
#include "Common/MediaSource.h"
#include "Util/File.h"
#include "System.h"
namespace FFmpeg {
#define FFmpeg_FIELD "ffmpeg."
const string kBin = FFmpeg_FIELD"bin";
const string kCmd = FFmpeg_FIELD"cmd";
const string kLog = FFmpeg_FIELD"log";
onceToken token([]() {
#ifdef _WIN32
string ffmpeg_bin = System::execute("where ffmpeg");
//windows下先关闭FFmpeg日志(目前不支持日志重定向)
mINI::Instance()[kCmd] = "%s -re -i \"%s\" -loglevel quiet -c:a aac -strict -2 -ar 44100 -ab 48k -c:v libx264 -f flv %s ";
#else
string ffmpeg_bin = System::execute("which ffmpeg");
mINI::Instance()[kCmd] = "%s -re -i \"%s\" -c:a aac -strict -2 -ar 44100 -ab 48k -c:v libx264 -f flv %s ";
#endif
//默认ffmpeg命令路径为环境变量中路径
mINI::Instance()[kBin] = ffmpeg_bin.empty() ? "ffmpeg" : ffmpeg_bin;
//ffmpeg日志保存路径
mINI::Instance()[kLog] = "./ffmpeg/ffmpeg.log";
});
}
FFmpegSource::FFmpegSource() {
_poller = EventPollerPool::Instance().getPoller();
}
FFmpegSource::~FFmpegSource() {
DebugL;
}
void FFmpegSource::play(const string &src_url,const string &dst_url,int timeout_ms,const onPlay &cb) {
GET_CONFIG(string,ffmpeg_bin,FFmpeg::kBin);
GET_CONFIG(string,ffmpeg_cmd,FFmpeg::kCmd);
GET_CONFIG(string,ffmpeg_log,FFmpeg::kLog);
_src_url = src_url;
_dst_url = dst_url;
_media_info.parse(dst_url);
char cmd[1024] = {0};
snprintf(cmd, sizeof(cmd),ffmpeg_cmd.data(),ffmpeg_bin.data(),src_url.data(),dst_url.data());
_process.run(cmd,ffmpeg_log.empty() ? "" : File::absolutePath("",ffmpeg_log));
InfoL << cmd;
if(_media_info._host == "127.0.0.1"){
//推流给自己的,通过判断流是否注册上来判断是否正常
if(_media_info._schema != RTSP_SCHEMA && _media_info._schema != RTMP_SCHEMA){
cb(SockException(Err_other,"本服务只支持rtmp/rtsp推流"));
return;
}
weak_ptr<FFmpegSource> weakSelf = shared_from_this();
findAsync(timeout_ms,[cb,weakSelf,timeout_ms](const MediaSource::Ptr &src){
auto strongSelf = weakSelf.lock();
if(!strongSelf){
//自己已经销毁
return;
}
if(src){
//推流给自己成功
cb(SockException());
strongSelf->onGetMediaSource(src);
strongSelf->startTimer(timeout_ms);
return;
}
//推流失败
if(!strongSelf->_process.wait(false)){
//ffmpeg进程已经退出
cb(SockException(Err_other,StrPrinter << "ffmpeg已经退出,exit code = " << strongSelf->_process.exit_code()));
return;
}
//ffmpeg进程还在线但是等待推流超时
cb(SockException(Err_other,"等待超时"));
});
} else{
//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
weak_ptr<FFmpegSource> weakSelf = shared_from_this();
_timer = std::make_shared<Timer>(timeout_ms / 1000,[weakSelf,cb,timeout_ms](){
auto strongSelf = weakSelf.lock();
if(!strongSelf){
//自身已经销毁
return false;
}
//FFmpeg还在线那么我们认为推流成功
if(strongSelf->_process.wait(false)){
cb(SockException());
strongSelf->startTimer(timeout_ms);
return false;
}
//ffmpeg进程已经退出
cb(SockException(Err_other,StrPrinter << "ffmpeg已经退出,exit code = " << strongSelf->_process.exit_code()));
return false;
},_poller);
}
}
void FFmpegSource::findAsync(int maxWaitMS, const function<void(const MediaSource::Ptr &src)> &cb) {
auto src = MediaSource::find(_media_info._schema,
_media_info._vhost,
_media_info._app,
_media_info._streamid,
false);
if(src || !maxWaitMS){
cb(src);
return;
}
void *listener_tag = this;
//若干秒后执行等待媒体注册超时回调
auto onRegistTimeout = _poller->doDelayTask(maxWaitMS,[cb,listener_tag](){
//取消监听该事件
NoticeCenter::Instance().delListener(listener_tag,Broadcast::kBroadcastMediaChanged);
cb(nullptr);
return 0;
});
weak_ptr<FFmpegSource> weakSelf = shared_from_this();
auto onRegist = [listener_tag,weakSelf,cb,onRegistTimeout](BroadcastMediaChangedArgs) {
auto strongSelf = weakSelf.lock();
if(!strongSelf) {
//本身已经销毁,取消延时任务
onRegistTimeout->cancel();
NoticeCenter::Instance().delListener(listener_tag,Broadcast::kBroadcastMediaChanged);
return;
}
if (!bRegist ||
sender.getSchema() != strongSelf->_media_info._schema ||
sender.getVhost() != strongSelf->_media_info._vhost ||
sender.getApp() != strongSelf->_media_info._app ||
sender.getId() != strongSelf->_media_info._streamid) {
//不是自己感兴趣的事件,忽略之
return;
}
//查找的流终于注册上了;取消延时任务,防止多次回调
onRegistTimeout->cancel();
//取消事件监听
NoticeCenter::Instance().delListener(listener_tag,Broadcast::kBroadcastMediaChanged);
//切换到自己的线程再回复
strongSelf->_poller->async([listener_tag,weakSelf,cb](){
auto strongSelf = weakSelf.lock();
if(!strongSelf) {
return;
}
//再找一遍媒体源,一般能找到
strongSelf->findAsync(0,cb);
}, false);
};
//监听媒体注册事件
NoticeCenter::Instance().addListener(listener_tag, Broadcast::kBroadcastMediaChanged, onRegist);
}
/**
* 定时检查媒体是否在线
*/
void FFmpegSource::startTimer(int timeout_ms) {
weak_ptr<FFmpegSource> weakSelf = shared_from_this();
_timer = std::make_shared<Timer>(1, [weakSelf, timeout_ms]() {
auto strongSelf = weakSelf.lock();
if (!strongSelf) {
//自身已经销毁
return false;
}
if (strongSelf->_media_info._host == "127.0.0.1") {
//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
strongSelf->findAsync(0, [&](const MediaSource::Ptr &src) {
//同步查找流
if (!src) {
//流不在线,重新拉流
if(strongSelf->_replay_ticker.elapsedTime() > 10 * 1000){
//上次重试时间超过10秒那么再重试FFmpeg拉流
strongSelf->_replay_ticker.resetTime();
strongSelf->play(strongSelf->_src_url, strongSelf->_dst_url, timeout_ms, [](const SockException &) {});
}
}
});
} else {
//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
if (!strongSelf->_process.wait(false)) {
//ffmpeg不在线重新拉流
strongSelf->play(strongSelf->_src_url, strongSelf->_dst_url, timeout_ms, [](const SockException &) {});
}
}
return true;
}, _poller);
}
void FFmpegSource::setOnClose(const function<void()> &cb){
_onClose = cb;
}
bool FFmpegSource::close(MediaSource &sender, bool force) {
auto listener = _listener.lock();
if(listener && !listener->close(sender,force)){
//关闭失败
return false;
}
//该流无人观看,我们停止吧
if(_onClose){
_onClose();
}
return true;
}
int FFmpegSource::totalReaderCount(MediaSource &sender) {
auto listener = _listener.lock();
if(listener){
return listener->totalReaderCount(sender);
}
return sender.readerCount();
}
void FFmpegSource::onGetMediaSource(const MediaSource::Ptr &src) {
_listener = src->getListener();
src->setListener(shared_from_this());
}