mirror of
https://github.com/ZLMediaKit/ZLMediaKit.git
synced 2024-11-02 17:41:33 +08:00
139 lines
3.9 KiB
C++
139 lines
3.9 KiB
C++
/*
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* MIT License
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*
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* Copyright (c) 2016 xiongziliang <771730766@qq.com>
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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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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in all
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* copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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#include <cctype>
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#include <algorithm>
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#include "RtpParser.h"
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#include "Util/base64.h"
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#include "H264/SPSParser.h"
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#include "Common/Factory.h"
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using namespace std;
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namespace ZL {
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namespace Rtsp {
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static int getTimeInSDP(const string &sdp) {
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auto strRange = FindField(sdp.data(), "a=range:npt=", "\r\n");
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strRange.append(" ");
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auto iPos = strRange.find('-');
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if (iPos == string::npos) {
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return 0;
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}
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auto strStart = strRange.substr(0, iPos);
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auto strEnd = strRange.substr(iPos + 1);
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strEnd.pop_back();
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if (strStart == "now") {
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strStart = "0";
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}
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return atof(strEnd.data()) - atof(strStart.data());
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}
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RtpParser::RtpParser(const string& sdp) {
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RtspTrack tmp[2];
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int cnt = parserSDP(sdp, tmp);
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for (int i = 0; i < cnt; i++) {
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switch (tmp[i].type) {
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case TrackVideo: {
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onGetVideoTrack(tmp[i]);
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}
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break;
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case TrackAudio: {
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onGetAudioTrack(tmp[i]);
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}
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break;
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default:
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break;
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}
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}
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m_fDuration = getTimeInSDP(sdp);
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}
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bool RtpParser::inputRtp(const RtpPacket::Ptr & rtp) {
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switch (rtp->getTrackType()) {
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case TrackVideo:
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return inputVideo(rtp);
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case TrackAudio:
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return inputAudio(rtp);
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default:
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return false;
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}
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}
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inline bool RtpParser::inputVideo(const RtpPacket::Ptr &rtp) {
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if(_videoRtpDecoder){
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return _videoRtpDecoder->inputRtp(rtp, true);
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}
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return false;
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}
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inline bool RtpParser::inputAudio(const RtpPacket::Ptr &rtp) {
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if(_audioRtpDecoder){
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return _audioRtpDecoder->inputRtp(rtp, false);
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}
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return false;
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}
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inline void RtpParser::onGetAudioTrack(const RtspTrack& audio) {
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//生成Track对象
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_audioTrack = dynamic_pointer_cast<AudioTrack>(Factory::getTrackBySdp(audio.trackSdp));
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if(_audioTrack){
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//生成RtpCodec对象以便解码rtp
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_audioRtpDecoder = Factory::getRtpDecoderById(_audioTrack->getCodecId(),_audioTrack->getAudioSampleRate());
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if(_audioRtpDecoder){
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//设置rtp解码器代理，生成的frame写入该Track
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_audioRtpDecoder->setDelegate(_audioTrack);
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}
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}
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}
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inline void RtpParser::onGetVideoTrack(const RtspTrack& video) {
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//生成Track对象
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_videoTrack = dynamic_pointer_cast<VideoTrack>(Factory::getTrackBySdp(video.trackSdp));
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if(_videoTrack){
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//生成RtpCodec对象以便解码rtp
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_videoRtpDecoder = Factory::getRtpDecoderById(_videoTrack->getCodecId(),90000);
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if(_videoRtpDecoder){
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//设置rtp解码器代理，生成的frame写入该Track
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_videoRtpDecoder->setDelegate(_videoTrack);
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}
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}
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}
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vector<Track::Ptr> RtpParser::getTracks() const {
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vector<Track::Ptr> ret;
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if(_videoTrack){
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ret.emplace_back(_videoTrack);
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}
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if(_audioTrack){
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ret.emplace_back(_audioTrack);
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}
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return ret;
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}
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} /* namespace Rtsp */
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} /* namespace ZL */
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