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rtc: sdp support decode and encode extmap

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This commit is contained in:
jinxue.cgh 2020-05-19 18:12:58 +08:00 • committed by winlin
parent 705843b512
commit b116632357
2 changed files with 23 additions and 2 deletions
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20
trunk/src/app/srs_app_rtc_sdp.cpp
View file

@ -330,6 +330,9 @@ srs_error_t SrsMediaDesc::encode(std::ostringstream& os)
os << kCRLF;
}
for(map<int, string>::iterator it = extmaps_.begin(); it != extmaps_.end(); ++it) {
os << "a=extmap:"<< it->first<< " "<< it->second<< kCRLF;
}
if (sendonly_) {
os << "a=sendonly" << kCRLF;
}
@ -399,8 +402,7 @@ srs_error_t SrsMediaDesc::parse_attribute(const std::string& content)
}
if (attribute == "extmap") {
// TODO:We don't parse "extmap" currently.
return 0;
return parse_attr_extmap(value);
} else if (attribute == "rtpmap") {
return parse_attr_rtpmap(value);
} else if (attribute == "rtcp") {
@ -435,6 +437,20 @@ srs_error_t SrsMediaDesc::parse_attribute(const std::string& content)
return err;
}
srs_error_t SrsMediaDesc::parse_attr_extmap(const std::string& value)
{
srs_error_t err = srs_success;
std::istringstream is(value);
int id = 0;
FETCH(is, id);
if(extmaps_.end() != extmaps_.find(id)) {
return srs_error_new(ERROR_RTC_SDP_DECODE, "duplicate ext id: %d", id);
}
string ext;
FETCH(is, ext);
extmaps_[id] = ext;
return err;
}
srs_error_t SrsMediaDesc::parse_attr_rtpmap(const std::string& value)
{

5
trunk/src/app/srs_app_rtc_sdp.hpp
View file

@ -31,6 +31,8 @@
#include <string>
#include <vector>
#include <map>
const std::string kTWCCExt = "http://www.ietf.org/id/draft-holmer-rmcat-transport-wide-cc-extensions-01";
class SrsSessionInfo
{
@ -115,6 +117,7 @@ public:
srs_error_t encode(std::ostringstream& os);
SrsMediaPayloadType* find_media_with_payload_type(int payload_type);
std::vector<SrsMediaPayloadType> find_media_with_encoding_name(const std::string& encoding_name) const;
const std::map<int, std::string>& get_extmaps() const { return extmaps_; }
bool is_audio() const { return type_ == "audio"; }
bool is_video() const { return type_ == "video"; }
@ -128,6 +131,7 @@ private:
srs_error_t parse_attr_msid(const std::string& value);
srs_error_t parse_attr_ssrc(const std::string& value);
srs_error_t parse_attr_ssrc_group(const std::string& value);
srs_error_t parse_attr_extmap(const std::string& value);
private:
SrsSSRCInfo& fetch_or_create_ssrc_info(uint32_t ssrc);
@ -153,6 +157,7 @@ public:
std::vector<SrsCandidate> candidates_;
std::vector<SrsSSRCGroup> ssrc_groups_;
std::vector<SrsSSRCInfo> ssrc_infos_;
std::map<int, std::string> extmaps_;
};
class SrsSdp