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RTC: Parse TWCC SN fastly.

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This commit is contained in:
winlin 2021-02-07 15:48:46 +08:00
parent 79a6907a65
commit 719df6fa41
3 changed files with 65 additions and 8 deletions
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9
trunk/src/app/srs_app_rtc_conn.cpp
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@ -1132,19 +1132,12 @@ srs_error_t SrsRtcPublishStream::on_rtp(char* data, int nb_data)
// Decode the header first.
if (twcc_id_) {
SrsRtpHeader h;
SrsBuffer b(data, nb_data);
h.ignore_padding(true); h.set_extensions(&extension_types_);
if ((err = h.decode(&b)) != srs_success) {
return srs_error_wrap(err, "twcc decode header");
}
// We must parse the TWCC from RTP header before SRTP unprotect, because:
// 1. Client may send some padding packets with invalid SequenceNumber, which causes the SRTP fail.
// 2. Server may send multiple duplicated NACK to client, and got more than one ARQ packet, which also fail SRTP.
// so, we must parse the header before SRTP unprotect(which may fail and drop packet).
uint16_t twcc_sn = 0;
if ((err = h.get_twcc_sequence_number(twcc_sn)) == srs_success) {
if ((err = srs_rtp_fast_parse_twcc(data, nb_data, &extension_types_, twcc_sn)) == srs_success) {
if((err = on_twcc(twcc_sn)) != srs_success) {
return srs_error_wrap(err, "on twcc");
}