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rtpenc: Allow including a SDES/CNAME block in RTCP SR packets

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Signed-off-by: Martin Storsjö <martin@martin.st>
This commit is contained in:
Martin Storsjö 2009-04-03 18:08:07 +03:00
parent 65e053271a
commit 3b2e8d1d21
2 changed files with 18 additions and 0 deletions
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17
libavformat/rtpenc.c
View File

@ -34,6 +34,7 @@ static const AVOption options[] = {
FF_RTP_FLAG_OPTS(RTPMuxContext, flags),
{ "payload_type", "Specify RTP payload type", offsetof(RTPMuxContext, payload_type), AV_OPT_TYPE_INT, {.i64 = -1 }, -1, 127, AV_OPT_FLAG_ENCODING_PARAM },
{ "ssrc", "Stream identifier", offsetof(RTPMuxContext, ssrc), AV_OPT_TYPE_INT, { .i64 = 0 }, INT_MIN, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM },
{ "cname", "CNAME to include in RTCP SR packets", offsetof(RTPMuxContext, cname), AV_OPT_TYPE_STRING, { .str = NULL }, 0, 0, AV_OPT_FLAG_ENCODING_PARAM },
{ NULL },
};
@ -271,6 +272,22 @@ static void rtcp_send_sr(AVFormatContext *s1, int64_t ntp_time)
avio_wb32(s1->pb, rtp_ts);
avio_wb32(s1->pb, s->packet_count);
avio_wb32(s1->pb, s->octet_count);
if (s->cname) {
int len = FFMIN(strlen(s->cname), 255);
avio_w8(s1->pb, (RTP_VERSION << 6) + 1);
avio_w8(s1->pb, RTCP_SDES);
avio_wb16(s1->pb, (7 + len + 3) / 4); /* length in words - 1 */
avio_wb32(s1->pb, s->ssrc);
avio_w8(s1->pb, 0x01); /* CNAME */
avio_w8(s1->pb, len);
avio_write(s1->pb, s->cname, len);
avio_w8(s1->pb, 0); /* END */
for (len = (7 + len) % 4; len % 4; len++)
avio_w8(s1->pb, 0);
}
avio_flush(s1->pb);
}

1
libavformat/rtpenc.h
View File

@ -30,6 +30,7 @@ struct RTPMuxContext {
AVStream *st;
int payload_type;
uint32_t ssrc;
const char *cname;
uint16_t seq;
uint32_t timestamp;
uint32_t base_timestamp;