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RTC: Refine SDP, parse H264 param

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This commit is contained in:
winlin 2020-08-13 17:37:04 +08:00
parent 314e3159f0
commit 7069233783
1 changed files with 27 additions and 24 deletions
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51
trunk/src/app/srs_app_rtc_source.cpp
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@ -1194,32 +1194,35 @@ SrsMediaPayloadType SrsVideoPayload::generate_media_payload_type()
srs_error_t SrsVideoPayload::set_h264_param_desc(std::string fmtp) srs_error_t SrsVideoPayload::set_h264_param_desc(std::string fmtp)
{ {
// TODO: FIXME: Refine code.
// for example: level-asymmetry-allowed=1;packetization-mode=1;profile-level-id=42e01f
srs_error_t err = srs_success; srs_error_t err = srs_success;
std::vector<std::string> vec = split_str(fmtp, ";");
for (size_t i = 0; i < vec.size(); ++i) { // For example: level-asymmetry-allowed=1;packetization-mode=1;profile-level-id=42e01f
std::vector<std::string> kv = split_str(vec[i], "="); std::vector<std::string> attributes = split_str(fmtp, ";");
if (kv.size() == 2) {
if (kv[0] == "profile-level-id") { for (size_t i = 0; i < attributes.size(); ++i) {
h264_param_.profile_level_id = kv[1]; std::string attribute = attributes.at(i);
} else if (kv[0] == "packetization-mode") {
// 6.3. Non-Interleaved Mode std::vector<std::string> kv = split_str(attribute, "=");
// This mode is in use when the value of the OPTIONAL packetization-mode if (kv.size() != 2) {
// media type parameter is equal to 1. This mode SHOULD be supported. return srs_error_new(ERROR_RTC_SDP_DECODE, "invalid h264 param=%s", attribute.c_str());
// It is primarily intended for low-delay applications. Only single NAL }
// unit packets, STAP-As, and FU-As MAY be used in this mode. STAP-Bs,
// MTAPs, and FU-Bs MUST NOT be used. The transmission order of NAL if (kv[0] == "profile-level-id") {
// units MUST comply with the NAL unit decoding order. h264_param_.profile_level_id = kv[1];
// @see https://tools.ietf.org/html/rfc6184#section-6.3 } else if (kv[0] == "packetization-mode") {
h264_param_.packetization_mode = kv[1]; // 6.3. Non-Interleaved Mode
} else if (kv[0] == "level-asymmetry-allowed") { // This mode is in use when the value of the OPTIONAL packetization-mode
h264_param_.level_asymmerty_allow = kv[1]; // media type parameter is equal to 1. This mode SHOULD be supported.
} else { // It is primarily intended for low-delay applications. Only single NAL
return srs_error_new(ERROR_RTC_SDP_DECODE, "invalid h264 param=%s", kv[0].c_str()); // unit packets, STAP-As, and FU-As MAY be used in this mode. STAP-Bs,
} // MTAPs, and FU-Bs MUST NOT be used. The transmission order of NAL
// units MUST comply with the NAL unit decoding order.
// @see https://tools.ietf.org/html/rfc6184#section-6.3
h264_param_.packetization_mode = kv[1];
} else if (kv[0] == "level-asymmetry-allowed") {
h264_param_.level_asymmerty_allow = kv[1];
} else { } else {
return srs_error_new(ERROR_RTC_SDP_DECODE, "invalid h264 param=%s", vec[i].c_str()); return srs_error_new(ERROR_RTC_SDP_DECODE, "invalid h264 param=%s", kv[0].c_str());
} }
} }