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sdp exchange.
This commit is contained in:
xiaozhihong
parent
ccd170a813
commit
49da2099c1
12 changed files with 1435 additions and 298 deletions
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@ -784,12 +784,14 @@ srs_error_t SrsGoApiStreams::serve_http(ISrsHttpResponseWriter* w, ISrsHttpMessa
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}
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#ifdef SRS_AUTO_RTC
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SrsGoApiSdp::SrsGoApiSdp(SrsRtcServer* rtc_svr)
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uint32_t SrsGoApiRtcPlay::ssrc_num = 0;
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SrsGoApiRtcPlay::SrsGoApiRtcPlay(SrsRtcServer* rtc_svr)
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{
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rtc_server = rtc_svr;
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}
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SrsGoApiSdp::~SrsGoApiSdp()
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SrsGoApiRtcPlay::~SrsGoApiRtcPlay()
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{
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}
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@ -803,7 +805,7 @@ SrsGoApiSdp::~SrsGoApiSdp()
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// Response:
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// {"sdp":"answer...", "sid":"..."}
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// @see https://github.com/rtcdn/rtcdn-draft
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srs_error_t SrsGoApiSdp::serve_http(ISrsHttpResponseWriter* w, ISrsHttpMessage* r)
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srs_error_t SrsGoApiRtcPlay::serve_http(ISrsHttpResponseWriter* w, ISrsHttpMessage* r)
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{
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srs_error_t err = srs_success;
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@ -818,7 +820,7 @@ srs_error_t SrsGoApiSdp::serve_http(ISrsHttpResponseWriter* w, ISrsHttpMessage*
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return srs_api_response(w, r, res->dumps());
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}
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srs_error_t SrsGoApiSdp::do_serve_http(ISrsHttpResponseWriter* w, ISrsHttpMessage* r, SrsJsonObject* res)
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srs_error_t SrsGoApiRtcPlay::do_serve_http(ISrsHttpResponseWriter* w, ISrsHttpMessage* r, SrsJsonObject* res)
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{
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srs_error_t err = srs_success;
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@ -881,23 +883,36 @@ srs_error_t SrsGoApiSdp::do_serve_http(ISrsHttpResponseWriter* w, ISrsHttpMessag
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// TODO: FIXME: It seems remote_sdp doesn't represents the full SDP information.
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SrsSdp remote_sdp;
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if ((err = remote_sdp.decode(remote_sdp_str)) != srs_success) {
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return srs_error_wrap(err, "decode sdp");
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if ((err = remote_sdp.parse(remote_sdp_str)) != srs_success) {
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return srs_error_wrap(err, "parse sdp failed");
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}
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if ((err = check_remote_sdp(remote_sdp)) != srs_success) {
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return srs_error_wrap(err, "remote sdp check failed");
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}
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SrsSdp local_sdp;
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if ((err = exchange_sdp(app, stream_name, remote_sdp, local_sdp)) != srs_success) {
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return srs_error_wrap(err, "remote sdp have error or unsupport attributes");
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}
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SrsRequest request;
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request.app = app;
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request.stream = stream_name;
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SrsSdp local_sdp;
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// TODO: FIXME: Maybe need a better name?
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// TODO: FIXME: When server enabled, but vhost disabled, should report error.
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SrsRtcSession* rtc_session = rtc_server->create_rtc_session(request, remote_sdp, local_sdp);
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string local_sdp_str = "";
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if ((err = local_sdp.encode(local_sdp_str)) != srs_success) {
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ostringstream os;
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if ((err = local_sdp.encode(os)) != srs_success) {
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return srs_error_wrap(err, "encode sdp");
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}
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string local_sdp_str = os.str();
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srs_trace("local_sdp=%s", local_sdp_str.c_str());
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res->set("code", SrsJsonAny::integer(ERROR_SUCCESS));
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res->set("server", SrsJsonAny::integer(SrsStatistic::instance()->server_id()));
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@ -910,6 +925,138 @@ srs_error_t SrsGoApiSdp::do_serve_http(ISrsHttpResponseWriter* w, ISrsHttpMessag
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return err;
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}
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srs_error_t SrsGoApiRtcPlay::check_remote_sdp(const SrsSdp& remote_sdp)
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{
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srs_error_t err = srs_success;
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if (remote_sdp.group_policy_ != "BUNDLE") {
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return srs_error_new(ERROR_RTC_SDP_EXCHANGE, "now only support BUNDLE, group policy=%s", remote_sdp.group_policy_.c_str());
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}
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if (remote_sdp.media_descs_.empty()) {
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return srs_error_new(ERROR_RTC_SDP_EXCHANGE, "no media descriptions");
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}
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for (std::vector<SrsMediaDesc>::const_iterator iter = remote_sdp.media_descs_.begin(); iter != remote_sdp.media_descs_.end(); ++iter) {
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if (iter->type_ != "audio" && iter->type_ != "video") {
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return srs_error_new(ERROR_RTC_SDP_EXCHANGE, "unsupport media type=%s", iter->type_.c_str());
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}
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if (! iter->rtcp_mux_) {
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return srs_error_new(ERROR_RTC_SDP_EXCHANGE, "now only suppor rtcp-mux");
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}
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for (std::vector<SrsMediaPayloadType>::const_iterator iter_media = iter->payload_types_.begin(); iter_media != iter->payload_types_.end(); ++iter_media) {
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if (iter->sendonly_) {
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return srs_error_new(ERROR_RTC_SDP_EXCHANGE, "play API only support sendrecv/recvonly");
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}
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}
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}
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return err;
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}
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srs_error_t SrsGoApiRtcPlay::exchange_sdp(const std::string& app, const std::string& stream, const SrsSdp& remote_sdp, SrsSdp& local_sdp)
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{
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srs_error_t err = srs_success;
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local_sdp.version_ = "0";
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local_sdp.username_ = RTMP_SIG_SRS_SERVER;
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local_sdp.session_id_ = srs_int2str((int64_t)this);
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local_sdp.session_version_ = "2";
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local_sdp.nettype_ = "IN";
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local_sdp.addrtype_ = "IP4";
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local_sdp.unicast_address_ = "0.0.0.0";
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local_sdp.session_name_ = "live_play_session";
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local_sdp.msid_semantic_ = "WMS";
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local_sdp.msids_.push_back(app + "/" + stream);
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local_sdp.group_policy_ = "BUNDLE";
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int mid = 0;
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for (int i = 0; i < remote_sdp.media_descs_.size(); ++i) {
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const SrsMediaDesc& remote_media_desc = remote_sdp.media_descs_[i];
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if (remote_media_desc.is_audio()) {
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local_sdp.media_descs_.push_back(SrsMediaDesc("audio"));
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} else if (remote_media_desc.is_video()) {
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local_sdp.media_descs_.push_back(SrsMediaDesc("video"));
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}
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SrsMediaDesc& local_media_desc = local_sdp.media_descs_.back();
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if (remote_media_desc.is_audio()) {
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// TODO: check opus format specific param
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std::vector<SrsMediaPayloadType> payloads = remote_media_desc.find_media_with_encoding_name("opus");
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for (std::vector<SrsMediaPayloadType>::iterator iter = payloads.begin(); iter != payloads.end(); ++iter) {
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// Only choose one match opus codec.
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local_media_desc.payload_types_.push_back(*iter);
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break;
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}
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if (local_media_desc.payload_types_.empty()) {
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return srs_error_new(ERROR_RTC_SDP_EXCHANGE, "no valid found opus payload type");
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}
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} else if (remote_media_desc.is_video()) {
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std::vector<SrsMediaPayloadType> payloads = remote_media_desc.find_media_with_encoding_name("H264");
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for (std::vector<SrsMediaPayloadType>::iterator iter = payloads.begin(); iter != payloads.end(); ++iter) {
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H264SpecificParam h264_param;
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if (parse_h264_fmtp(iter->format_specific_param_, h264_param) != 0) {
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continue;
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}
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if (h264_param.packetization_mode == 1 && h264_param.level_asymmerty_allow == 1) {
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// Only choose first match H.264 payload type.
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local_media_desc.payload_types_.push_back(*iter);
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break;
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}
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}
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if (local_media_desc.payload_types_.empty()) {
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return srs_error_new(ERROR_RTC_SDP_EXCHANGE, "no valid found H.264 payload type");
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}
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}
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local_media_desc.mid_ = remote_media_desc.mid_;
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local_sdp.groups_.push_back(local_media_desc.mid_);
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local_media_desc.port_ = 9;
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local_media_desc.protos_ = "UDP/TLS/RTP/SAVPF";
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if (remote_media_desc.session_info_.setup_ == "active") {
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local_media_desc.session_info_.setup_ = "passive";
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} else if (remote_media_desc.session_info_.setup_ == "passive") {
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local_media_desc.session_info_.setup_ = "active";
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} else if (remote_media_desc.session_info_.setup_ == "actpass") {
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local_media_desc.session_info_.setup_ = "passive";
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}
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local_sdp.media_descs_.back().session_info_.ice_options_ = "trickle";
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if (remote_media_desc.sendonly_) {
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local_media_desc.recvonly_ = true;
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} else if (remote_media_desc.recvonly_) {
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local_media_desc.sendonly_ = true;
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} else if (remote_media_desc.sendrecv_) {
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local_media_desc.sendrecv_ = true;
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}
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local_media_desc.rtcp_mux_ = true;
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SrsSSRCInfo ssrc_info;
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ssrc_info.ssrc_ = ++ssrc_num;
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ssrc_info.cname_ = "test_sdp_cname";
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local_media_desc.ssrc_infos_.push_back(ssrc_info);
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}
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return err;
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}
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#endif
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SrsGoApiClients::SrsGoApiClients()
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