From ec925a64e4541fc265123741baddaf11f167c691 Mon Sep 17 00:00:00 2001 From: xiongziliang <771730766@qq.com> Date: Tue, 8 Oct 2019 12:55:19 +0800 Subject: [PATCH] =?UTF-8?q?=E9=98=B2=E6=AD=A2=E6=97=B6=E9=97=B4=E6=88=B3?= =?UTF-8?q?=E5=9B=9E=E6=BB=9A?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit --- src/MediaFile/Stamp.cpp | 75 ++++++++++++++++++++----------------- src/MediaFile/Stamp.h | 46 +++++++++++++++++------ src/Rtsp/RtspPlayer.cpp | 83 ++++++++++++++++------------------------- src/Rtsp/RtspPlayer.h | 11 ++---- 4 files changed, 112 insertions(+), 103 deletions(-) diff --git a/src/MediaFile/Stamp.cpp b/src/MediaFile/Stamp.cpp index faf20e58..e053c122 100644 --- a/src/MediaFile/Stamp.cpp +++ b/src/MediaFile/Stamp.cpp @@ -28,51 +28,51 @@ namespace mediakit { -void Stamp::revise(uint32_t dts, uint32_t pts, int64_t &dts_out, int64_t &pts_out) { - if(!pts){ - //没有播放时间戳,使其赋值为解码时间戳 +int64_t DeltaStamp::deltaStamp(int64_t stamp) { + if(!_last_stamp){ + //第一次计算时间戳增量,时间戳增量为0 + _last_stamp = stamp; + return 0; + } + + int64_t ret = stamp - _last_stamp; + if(ret >= 0){ + //时间戳增量为正，返回之 + _last_stamp = stamp; + return ret; + } + + //时间戳增量为负，说明时间戳回环了或回退了 + _last_stamp = stamp; + return _playback ? ret : 0; +} + +void DeltaStamp::setPlayBack(bool playback) { + _playback = playback; +} + +void Stamp::revise(int64_t dts, int64_t pts, int64_t &dts_out, int64_t &pts_out) { + if(!dts && !pts){ + //没有时间戳，我们生成时间戳 + pts = dts = _ticker.elapsedTime(); + }else if(!pts){ + //只是没有播放时间戳,使其赋值为解码时间戳 pts = dts; } + //pts和dts的差值 int pts_dts_diff = pts - dts; - if(_first){ - //记录第一次时间戳，后面好计算时间戳增量 - _start_dts = dts; - _first = false; - _ticker.resetTime(); - } - if (!dts) { - //没有解码时间戳，我们生成解码时间戳 - dts = _ticker.elapsedTime(); - } - //相对时间戳 - dts_out = dts - _start_dts; - if(!_playback){ - if(dts_out < _dts_inc){ - //本次相对时间戳竟然小于上次？ - if(dts_out < 0 || _dts_inc - dts_out > 0xFFFF){ - //时间戳回环,保证下次相对时间戳与本次相对合理增长 - _start_dts = dts - _dts_inc; - //本次时间戳强制等于上次时间戳 - dts_out = _dts_inc; - }else{ - //时间戳变小了？,那么取上次时间戳 - dts_out = _dts_inc; - } - } - } - - - //保留这次相对时间戳，以便下次对比是否回环或乱序 - _dts_inc = dts_out; + _relativeStamp += deltaStamp(dts); + dts_out = _relativeStamp; //////////////以下是播放时间戳的计算////////////////// if(pts_dts_diff > 200 || pts_dts_diff < -200){ //如果差值大于200毫秒，则认为由于回环导致时间戳错乱了 pts_dts_diff = 0; } + pts_out = dts_out + pts_dts_diff; if(pts_out < 0){ //时间戳不能小于0 @@ -80,8 +80,13 @@ void Stamp::revise(uint32_t dts, uint32_t pts, int64_t &dts_out, int64_t &pts_ou } } -void Stamp::setPlayBack(bool playback) { - _playback = playback; +void Stamp::setRelativeStamp(int64_t relativeStamp) { + _relativeStamp = relativeStamp; } +int64_t Stamp::getRelativeStamp() const { + return _relativeStamp; +} + + }//namespace mediakit \ No newline at end of file diff --git a/src/MediaFile/Stamp.h b/src/MediaFile/Stamp.h index 8616f8a7..23a427f3 100644 --- a/src/MediaFile/Stamp.h +++ b/src/MediaFile/Stamp.h @@ -33,18 +33,33 @@ using namespace toolkit; namespace mediakit { -//该类解决时间戳回环、回退问题 -//计算相对时间戳或者产生平滑时间戳 -class Stamp { +class DeltaStamp{ public: - Stamp() = default; - ~Stamp() = default; + DeltaStamp() = default; + ~DeltaStamp() = default; /** - * 设置回放模式，回放模式时间戳可以回退 + * 计算时间戳增量 + * @param stamp 绝对时间戳 + * @return 时间戳增量 + */ + int64_t deltaStamp(int64_t stamp); + + /** + * 设置是否为回放模式，回放模式运行时间戳回退 * @param playback 是否为回放模式 */ void setPlayBack(bool playback = true); +private: + int64_t _last_stamp = 0; + bool _playback = false; +}; +//该类解决时间戳回环、回退问题 +//计算相对时间戳或者产生平滑时间戳 +class Stamp : public DeltaStamp{ +public: + Stamp() = default; + ~Stamp() = default; /** * 修正时间戳 @@ -53,12 +68,21 @@ public: * @param dts_out 输出dts * @param pts_out 输出pts */ - void revise(uint32_t dts, uint32_t pts, int64_t &dts_out, int64_t &pts_out); + void revise(int64_t dts, int64_t pts, int64_t &dts_out, int64_t &pts_out); + + /** + * 再设置相对时间戳，用于seek用 + * @param relativeStamp 相对时间戳 + */ + void setRelativeStamp(int64_t relativeStamp); + + /** + * 获取当前相对时间戳 + * @return + */ + int64_t getRelativeStamp() const ; private: - bool _playback = false; - int64_t _start_dts = 0; - int64_t _dts_inc = 0; - bool _first = true; + int64_t _relativeStamp = 0; SmoothTicker _ticker; }; diff --git a/src/Rtsp/RtspPlayer.cpp b/src/Rtsp/RtspPlayer.cpp index 126135fe..04d7b184 100644 --- a/src/Rtsp/RtspPlayer.cpp +++ b/src/Rtsp/RtspPlayer.cpp @@ -68,12 +68,9 @@ void RtspPlayer::teardown(){ CLEAR_ARR(_aui64RtpRecv) CLEAR_ARR(_aui64RtpRecv) CLEAR_ARR(_aui16NowSeq) - CLEAR_ARR(_aiFistStamp); - CLEAR_ARR(_aiNowStamp); - _pPlayTimer.reset(); + _pPlayTimer.reset(); _pRtpTimer.reset(); - _iSeekTo = 0; _uiCseq = 1; _onHandshake = nullptr; } @@ -222,6 +219,16 @@ void RtspPlayer::handleResDESCRIBE(const Parser& parser) { SdpParser sdpParser(parser.Content()); //解析sdp _aTrackInfo = sdpParser.getAvailableTrack(); + auto title = sdpParser.getTrack(TrackTitle); + bool isPlayback = false; + if(title && title->_duration ){ + isPlayback = true; + } + + for(auto &stamp : _stamp){ + stamp.setPlayBack(isPlayback); + stamp.setRelativeStamp(0); + } if (_aTrackInfo.empty()) { throw std::runtime_error("无有效的Sdp Track"); @@ -386,7 +393,7 @@ void RtspPlayer::handleResSETUP(const Parser &parser, unsigned int uiTrackIndex) } //所有setup命令发送完毕 //发送play命令 - pause(false); + sendPause(false, 0,false); } void RtspPlayer::sendOptions() { @@ -403,25 +410,19 @@ void RtspPlayer::sendDescribe() { } -void RtspPlayer::sendPause(bool bPause,uint32_t seekMS){ - if(!bPause){ - //修改时间轴 - int iTimeInc = seekMS - getProgressMilliSecond(); - for(unsigned int i = 0 ;i < _aTrackInfo.size() ;i++){ - _aiFistStamp[i] = _aiNowStamp[i] + iTimeInc; - _aiNowStamp[i] = _aiFistStamp[i]; - } - _iSeekTo = seekMS; - } - +void RtspPlayer::sendPause(bool bPause,uint32_t seekMS,bool range){ //开启或暂停rtsp _onHandshake = std::bind(&RtspPlayer::handleResPAUSE,this, placeholders::_1,bPause); - sendRtspRequest(bPause ? "PAUSE" : "PLAY", - _strContentBase, - {"Range",StrPrinter << "npt=" << setiosflags(ios::fixed) << setprecision(2) << seekMS / 1000.0 << "-"}); + if(!bPause && range){ + sendRtspRequest(bPause ? "PAUSE" : "PLAY", _strContentBase, + {"Range",StrPrinter << "npt=" << setiosflags(ios::fixed) << setprecision(2) << seekMS / 1000.0 << "-"}); + } else{ + sendRtspRequest(bPause ? "PAUSE" : "PLAY", _strContentBase); + } + } void RtspPlayer::pause(bool bPause) { - sendPause(bPause, getProgressMilliSecond()); + sendPause(bPause, getProgressMilliSecond(),false); } void RtspPlayer::handleResPAUSE(const Parser& parser, bool bPause) { @@ -430,6 +431,7 @@ void RtspPlayer::handleResPAUSE(const Parser& parser, bool bPause) { return; } if (!bPause) { + uint32_t iSeekTo = 0; //修正时间轴 auto strRange = parser["Range"]; if (strRange.size()) { @@ -437,25 +439,12 @@ void RtspPlayer::handleResPAUSE(const Parser& parser, bool bPause) { if (strStart == "now") { strStart = "0"; } - _iSeekTo = 1000 * atof(strStart.data()); - DebugL << "seekTo(ms):" << _iSeekTo ; - } - auto strRtpInfo = parser["RTP-Info"]; - if (strRtpInfo.size()) { - strRtpInfo.append(","); - vector vec = split(strRtpInfo, ","); - for(auto &strTrack : vec){ - strTrack.append(";"); - auto strControlSuffix = strTrack.substr(1 + strTrack.rfind('/'),strTrack.find(';') - strTrack.rfind('/') - 1); - auto strRtpTime = FindField(strTrack.data(), "rtptime=", ";"); - auto idx = getTrackIndexByControlSuffix(strControlSuffix); - if(idx != -1){ - _aiFistStamp[idx] = _aTrackInfo[idx]->_samplerate>0?atoll(strRtpTime.data()) * 1000 / _aTrackInfo[idx]->_samplerate :1; - _aiNowStamp[idx] = _aiFistStamp[idx]; - DebugL << "rtptime(ms):" << strControlSuffix <<" " << strRtpTime; - } - } + iSeekTo = 1000 * atof(strStart.data()); + DebugL << "seekTo(ms):" << iSeekTo ; } + //设置相对时间戳 + _stamp[0].setRelativeStamp(iSeekTo); + _stamp[1].setRelativeStamp(iSeekTo); onPlayResult_l(SockException(Err_success, "rtsp play success")); } else { _pRtpTimer.reset(); @@ -630,12 +619,11 @@ void RtspPlayer::onRtpSorted(const RtpPacket::Ptr &rtppt, int trackidx){ } _aui64RtpRecv[trackidx] ++; _aui16NowSeq[trackidx] = rtppt->sequence; - _aiNowStamp[trackidx] = rtppt->timeStamp; - if( _aiFistStamp[trackidx] == 0){ - _aiFistStamp[trackidx] = _aiNowStamp[trackidx]; - } - rtppt->timeStamp -= _aiFistStamp[trackidx]; + //计算相对时间戳 + int64_t dts_out; + _stamp[trackidx].revise(rtppt->timeStamp,rtppt->timeStamp,dts_out,dts_out); + rtppt->timeStamp = dts_out; onRecvRTP_l(rtppt,_aTrackInfo[trackidx]); } float RtspPlayer::getPacketLossRate(TrackType type) const{ @@ -653,7 +641,6 @@ float RtspPlayer::getPacketLossRate(TrackType type) const{ return 1.0 - (double)totalRecv / totalSend; } - if(_aui16NowSeq[iTrackIdx] - _aui16FirstSeq[iTrackIdx] + 1 == 0){ return 0; } @@ -661,14 +648,10 @@ float RtspPlayer::getPacketLossRate(TrackType type) const{ } uint32_t RtspPlayer::getProgressMilliSecond() const{ - uint32_t iTime[2] = {0,0}; - for(unsigned int i = 0 ;i < _aTrackInfo.size() ;i++){ - iTime[i] = _aiNowStamp[i] - _aiFistStamp[i]; - } - return _iSeekTo + MAX(iTime[0],iTime[1]); + return MAX(_stamp[0].getRelativeStamp(),_stamp[1].getRelativeStamp()); } void RtspPlayer::seekToMilliSecond(uint32_t ms) { - sendPause(false,ms); + sendPause(false,ms, true); } void RtspPlayer::sendRtspRequest(const string &cmd, const string &url, const std::initializer_list &header) { diff --git a/src/Rtsp/RtspPlayer.h b/src/Rtsp/RtspPlayer.h index 5977539b..4de652d8 100644 --- a/src/Rtsp/RtspPlayer.h +++ b/src/Rtsp/RtspPlayer.h @@ -40,6 +40,7 @@ #include "Network/TcpClient.h" #include "RtspSplitter.h" #include "RtpReceiver.h" +#include "MediaFile/Stamp.h" using namespace std; using namespace toolkit; @@ -114,7 +115,7 @@ private: //发送SETUP命令 void sendSetup(unsigned int uiTrackIndex); - void sendPause(bool bPause,uint32_t ms); + void sendPause(bool bPause,uint32_t ms, bool range); void sendOptions(); void sendDescribe(); @@ -148,12 +149,8 @@ private: std::shared_ptr _pPlayTimer; std::shared_ptr _pRtpTimer; - //播放进度控制,单位毫秒 - uint32_t _iSeekTo = 0; - - //单位毫秒 - uint32_t _aiFistStamp[2] = {0,0}; - uint32_t _aiNowStamp[2] = {0,0}; + //时间戳 + Stamp _stamp[2]; //rtcp相关 RtcpCounter _aRtcpCnt[2]; //rtcp统计,trackid idx 为数组下标