提高rtsp客户端兼容性

src/Rtsp/Rtsp.cpp

@@ -85,8 +85,26 @@ string SdpTrack::toString() const {
 	}
 	return _printer;
 }
+
+static TrackType toTrackType(const string &str) {
+	if (str == "") {
+		return TrackTitle;
+	}
+
+	if (str == "video") {
+		return TrackVideo;
+	}
+
+	if (str == "audio") {
+		return TrackAudio;
+	}
+
+	return TrackInvalid;
+}
+
 void SdpParser::load(const string &sdp) {
-	_track_map.clear();
+	{
+		_track_vec.clear();
 		string key;
 		SdpTrack::Ptr track = std::make_shared<SdpTrack>();
 
@@ -118,7 +136,8 @@ void SdpParser::load(const string &sdp) {
 					track->_b = opt_val;
 					break;
 				case 'm': {
-				_track_map[key] = track;
+					track->_type = toTrackType(key);
+					_track_vec.emplace_back(track);
 					track = std::make_shared<SdpTrack>();
 					key = FindField(opt_val.data(), nullptr, " ");
 					track->_m = opt_val;
@@ -138,21 +157,12 @@ void SdpParser::load(const string &sdp) {
 					break;
 			}
 		}
-	_track_map[key] = track;
-
-
-	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") {
-			track._type = TrackAudio;
-		} else {
-			track._type = TrackInvalid;
+		track->_type = toTrackType(key);
+		_track_vec.emplace_back(track);
 	}
 
+	for (auto &track_ptr : _track_vec) {
+		auto &track = *track_ptr;
 		auto it = track._attr.find("range");
 		if (it != track._attr.end()) {
 			char name[16] = {0}, start[16] = {0}, end[16] = {0};
@@ -198,9 +208,9 @@ bool SdpParser::available() const {
 }
 
 SdpTrack::Ptr SdpParser::getTrack(TrackType type) const {
-	for (auto &pr : _track_map){
-		if(pr.second->_type == type){
-			return pr.second;
+	for (auto &track : _track_vec){
+		if(track->_type == type){
+			return track;
 		}
 	}
 	return nullptr;
@@ -208,31 +218,42 @@ SdpTrack::Ptr SdpParser::getTrack(TrackType type) const {
 
 vector<SdpTrack::Ptr> SdpParser::getAvailableTrack() const {
 	vector<SdpTrack::Ptr> ret;
-	auto video = getTrack(TrackVideo);
-	if(video){
-		ret.emplace_back(video);
+	bool audio_added = false;
+	bool video_added = false;
+	for (auto &track : _track_vec){
+		if(track->_type == TrackAudio ){
+			if(!audio_added){
+				ret.emplace_back(track);
+				audio_added = true;
 			}
-	auto audio = getTrack(TrackAudio);
-	if(audio){
-		ret.emplace_back(audio);
+			continue;
 		}
-	return ret;
+
+		if(track->_type == TrackVideo ){
+			if(!video_added){
+				ret.emplace_back(track);
+				video_added = true;
+			}
+			continue;
+		}
+	}
+	return std::move(ret);
 }
 
 string SdpParser::toString() const {
 	string title,audio,video;
-	for(auto &pr : _track_map){
-		switch (pr.second->_type){
+	for(auto &track : _track_vec){
+		switch (track->_type){
 			case TrackTitle:{
-				title = pr.second->toString();
+				title = track->toString();
 			}
 				break;
 			case TrackVideo:{
-				video = pr.second->toString();
+				video = track->toString();
 			}
 				break;
 			case TrackAudio:{
-				audio = pr.second->toString();
+				audio = track->toString();
 			}
 				break;
 			default:

src/Rtsp/Rtsp.h

@@ -122,7 +122,7 @@ public:
 	vector<SdpTrack::Ptr> getAvailableTrack() const;
 	string toString() const ;
 private:
-	map<string, SdpTrack::Ptr> _track_map;
+	vector<SdpTrack::Ptr> _track_vec;
 };
 
 /**