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添加新的sdp解析算法

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This commit is contained in:
xiongziliang
2018-10-25 22:57:59 +08:00
parent 062bdd6e02
commit 6a7c76be06
5 changed files with 124 additions and 38 deletions
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119
src/Rtsp/Rtsp.cpp
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@@ -49,78 +49,124 @@ string FindField(const char* buf, const char* start, const char *end ,int bufSiz
}
return string(msg_start, msg_end);
}
int parserSDP(const string& sdp, RtspTrack Track[2]) {
map<string,map<char ,map<string ,string> > > sdpAttr;
string sdpTrack = "";
void SdpAttr::load(const string &sdp) {
_track_map.clear();
string key;
SdpTrack::Ptr track = std::make_shared<SdpTrack>();
auto lines = split(sdp,"\n");
for (auto &line : lines){
trim(line);
if(line.size() < 2){
continue;
}
if(line[1] != '='){
if(line.size() < 2 || line[1] != '='){
continue;
}
char opt = line[0];
string opt_val = line.substr(2);
switch (opt){
case 'o':
track->_o = opt_val;
break;
case 's':
track->_s = opt_val;
break;
case 'i':
track->_i = opt_val;
break;
case 'c':
case 't':{
sdpAttr[sdpTrack][opt][""] = opt_val;
}
track->_c = opt_val;
break;
case 't':
track->_t = opt_val;
break;
case 'b':
track->_b = opt_val;
break;
case 'm':{
sdpTrack = FindField(opt_val.data(), nullptr," ");
sdpAttr[sdpTrack][opt][""] = opt_val;
_track_map[key] = track;
track = std::make_shared<SdpTrack>();
key = FindField(opt_val.data(), nullptr," ");;
track->_m = opt_val;
}
break;
case 'a':{
string attr = FindField(opt_val.data(), nullptr,":");
if(attr.empty()){
sdpAttr[sdpTrack][opt][opt_val] = opt_val;
track->_attr[opt_val] = "";
}else{
sdpAttr[sdpTrack][opt][attr] = FindField(opt_val.data(),":", nullptr);
track->_attr[attr] = FindField(opt_val.data(),":", nullptr);
}
}
break;
default:
track->_other[opt] = opt_val;
break;
}
}
_track_map[key] = track;
for (auto &pr : sdpAttr) {
TrackType trackType = TrackInvalid;
if (pr.first == "video") {
trackType = TrackVideo;
for (auto &pr : _track_map) {
auto &track = *pr.second;
if (pr.first == "") {
track._type = TrackTitle;
} else if (pr.first == "video") {
track._type = TrackVideo;
} else if (pr.first == "audio") {
trackType = TrackAudio;
} else if (pr.first == "") {
//title
auto range = pr.second['a']["range"];
char name[16] = {0},start[16] = {0},end[16] = {0};
if (2 == sscanf(range.data(), "%15[^=]=%15[^-]-%15s", name, start, end)) {
}
DebugL << range;
continue;
track._type = TrackAudio;
} else {
continue;
track._type = TrackInvalid;
}
auto rtpmap = pr.second['a']["rtpmap"];
int pt, samplerate;
char codec[16] = {0};
if (3 == sscanf(rtpmap.data(), "%d %15[^/]/%d", &pt, codec, &samplerate)) {
auto it = track._attr.find("range");
if (it != track._attr.end()) {
char name[16] = {0}, start[16] = {0}, end[16] = {0};
int ret = sscanf(it->second.data(), "%15[^=]=%15[^-]-%15s", name, start, end);
if (3 == ret || 2 == ret) {
if (strcmp(start, "now") == 0) {
strcpy(start, "0");
}
track._start = atof(start);
track._end = atof(end);
track._duration = track._end - track._start;
}
}
it = track._attr.find("rtpmap");
if(it != track._attr.end()){
auto rtpmap = it->second;
int pt, samplerate;
char codec[16] = {0};
if (3 == sscanf(rtpmap.data(), "%d %15[^/]/%d", &pt, codec, &samplerate)) {
track._pt = pt;
track._codec = codec;
track._samplerate = samplerate;
}
}
it = track._attr.find("fmtp");
if(it != track._attr.end()) {
track._fmtp = it->second;
}
it = track._attr.find("control");
if(it != track._attr.end()) {
track._control = it->second;
}
DebugL << codec;
}
}
SdpTrack::Ptr SdpAttr::getTrack(TrackType type) {
for (auto &pr : _track_map){
if(pr.second->_type == type){
return pr.second;
}
}
return nullptr;
}
int parserSDP(const string& sdp, RtspTrack Track[2]) {
int track_cnt = 0;
string::size_type pos_head = 0;
while ((pos_head = sdp.find("m=",pos_head)) != string::npos ) {
@@ -169,6 +215,7 @@ static onceToken s_token([](){
"a=recvonly";
RtspTrack track[2];
parserSDP(str,track);
SdpAttr attr(str);
track[0].inited=true;
});
bool MakeNalu(uint8_t in, NALU &nal) {
@@ -190,3 +237,5 @@ bool MakeFU(uint8_t in, FU &fu) {
}
return true;
}