diff options
Diffstat (limited to 'pjmedia/src/pjmedia/stream_info.c')
| -rw-r--r-- | pjmedia/src/pjmedia/stream_info.c | 49 |
1 files changed, 49 insertions, 0 deletions
diff --git a/pjmedia/src/pjmedia/stream_info.c b/pjmedia/src/pjmedia/stream_info.c index 3ed32f7e..878d44c1 100644 --- a/pjmedia/src/pjmedia/stream_info.c +++ b/pjmedia/src/pjmedia/stream_info.c @@ -33,6 +33,47 @@ static const pj_str_t ID_RTP_SAVP = { "RTP/SAVP", 8 }; static const pj_str_t ID_RTPMAP = { "rtpmap", 6 }; static const pj_str_t ID_TELEPHONE_EVENT = { "telephone-event", 15 }; +static void get_opus_channels_and_clock_rate(const pjmedia_codec_fmtp *enc_fmtp, + const pjmedia_codec_fmtp *dec_fmtp, + unsigned *channel_cnt, + unsigned *clock_rate) +{ + unsigned i; + unsigned enc_channel_cnt = 0, local_channel_cnt = 0; + unsigned enc_clock_rate = 0, local_clock_rate = 0; + + for (i = 0; i < dec_fmtp->cnt; ++i) { + if (!pj_stricmp2(&dec_fmtp->param[i].name, "sprop-maxcapturerate")) { + local_clock_rate = (unsigned)pj_strtoul(&dec_fmtp->param[i].val); + } else if (!pj_stricmp2(&dec_fmtp->param[i].name, "sprop-stereo")) { + local_channel_cnt = (unsigned)pj_strtoul(&dec_fmtp->param[i].val); + local_channel_cnt = (local_channel_cnt > 0) ? 2 : 1; + } + } + if (!local_clock_rate) local_clock_rate = *clock_rate; + if (!local_channel_cnt) local_channel_cnt = *channel_cnt; + + for (i = 0; i < enc_fmtp->cnt; ++i) { + if (!pj_stricmp2(&enc_fmtp->param[i].name, "maxplaybackrate")) { + enc_clock_rate = (unsigned)pj_strtoul(&enc_fmtp->param[i].val); + } else if (!pj_stricmp2(&enc_fmtp->param[i].name, "stereo")) { + enc_channel_cnt = (unsigned)pj_strtoul(&enc_fmtp->param[i].val); + enc_channel_cnt = (enc_channel_cnt > 0) ? 2 : 1; + } + } + /* The default is a standard mono session with 48000 Hz clock rate + * (RFC 7587, section 7) + */ + if (!enc_clock_rate) enc_clock_rate = 48000; + if (!enc_channel_cnt) enc_channel_cnt = 1; + + *clock_rate = (enc_clock_rate < local_clock_rate) ? enc_clock_rate : + local_clock_rate; + + *channel_cnt = (enc_channel_cnt < local_channel_cnt) ? enc_channel_cnt : + local_channel_cnt; +} + /* * Internal function for collecting codec info and param from the SDP media. */ @@ -218,6 +259,14 @@ static pj_status_t get_audio_codec_info_param(pjmedia_stream_info *si, pjmedia_stream_info_parse_fmtp(pool, local_m, si->rx_pt, &si->param->setting.dec_fmtp); + if (!pj_stricmp2(&si->fmt.encoding_name, "opus")) { + get_opus_channels_and_clock_rate(&si->param->setting.enc_fmtp, + &si->param->setting.dec_fmtp, + &si->fmt.channel_cnt, + &si->fmt.clock_rate); + } + + /* Get the remote ptime for our encoder. */ attr = pjmedia_sdp_attr_find2(rem_m->attr_count, rem_m->attr, "ptime", NULL); |