mirror of
https://github.com/ZLMediaKit/ZLMediaKit.git
synced 2024-11-01 17:11:31 +08:00
121 lines
4.0 KiB
C++
121 lines
4.0 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 <stdlib.h>
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#include "Rtsp.h"
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string FindField(const char* buf, const char* start, const char *end ,int bufSize) {
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if(bufSize <=0 ){
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bufSize = strlen(buf);
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}
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const char *msg_start = buf, *msg_end = buf + bufSize;
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int len = 0;
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if (start != NULL) {
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len = strlen(start);
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msg_start = strstr(buf, start);
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}
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if (msg_start == NULL) {
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return "";
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}
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msg_start += len;
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if (end != NULL) {
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msg_end = strstr(msg_start, end);
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if (msg_end == NULL) {
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return "";
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}
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}
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return string(msg_start, msg_end);
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}
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int parserSDP(const string& sdp, RtspTrack Track[2]) {
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int track_cnt = 0;
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string::size_type pos_head = 0;
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while ((pos_head = sdp.find("m=",pos_head)) != string::npos ) {
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auto pos_end = sdp.find("m=", pos_head + 2);
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if (pos_end == string::npos) {
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pos_end = sdp.size();
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}
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auto sdp_mid = sdp.substr(pos_head, pos_end - pos_head);
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Track[track_cnt].trackSdp = sdp_mid;
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Track[track_cnt].inited = false;
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Track[track_cnt].PT = atoi(FindField(sdp_mid.c_str(), "a=rtpmap:", " ").c_str());
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auto control = string("/") + trim(FindField(sdp_mid.c_str(), "a=control:", "\n"));
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Track[track_cnt].controlSuffix = control.substr(1 + control.rfind('/'));
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if (sdp_mid.find("m=video") != string::npos) {
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//视频通道
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Track[track_cnt].type = TrackVideo;
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} else if (sdp_mid.find("m=audio") != string::npos) {
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//音频通道
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Track[track_cnt].type = TrackAudio;
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} else {
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//不识别的track
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return track_cnt;
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}
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pos_head = pos_end;
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track_cnt++;
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}
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return track_cnt;
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}
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//static onceToken s_token([](){
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// string str = "v=0\n"
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// "o=- 1001 1 IN IP4 192.168.0.22\n"
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// "s=VCP IPC Realtime stream\n"
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// "m=video 0 RTP/AVP 105\n"
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// "c=IN IP4 192.168.0.22\n"
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// "a=control:rtsp://192.168.0.22/media/video1/video\n"
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// "a=rtpmap:105 H264/90000\n"
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// "a=fmtp:105 profile-level-id=64001f; packetization-mode=1; sprop-parameter-sets=Z2QAH6wrUCgC3QgAAB9AAAYahCAA,aO4xsg==\n"
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// "a=recvonly\n"
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// "m=application 0 RTP/AVP 107\n"
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// "c=IN IP4 192.168.0.22\n"
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// "a=control:rtsp://192.168.0.22/media/video1/metadata\n"
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// "a=rtpmap:107 vnd.onvif.metadata/90000\n"
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// "a=fmtp:107 DecoderTag=h3c-v3 RTCP=0\n"
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// "a=recvonly";
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// RtspTrack track[2];
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// parserSDP(str,track);
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// track[0].inited=true;
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//});
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bool MakeNalu(char in, NALU &nal) {
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nal.forbidden_zero_bit = in >> 7;
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if (nal.forbidden_zero_bit) {
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return false;
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}
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nal.nal_ref_idc = (in & 0x60) >> 5;
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nal.type = in & 0x1f;
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return true;
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}
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bool MakeFU(char in, FU &fu) {
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fu.S = in >> 7;
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fu.E = (in >> 6) & 0x01;
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fu.R = (in >> 5) & 0x01;
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fu.type = in & 0x1f;
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if (fu.R != 0) {
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return false;
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}
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return true;
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}
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