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rtsp: Parse RTP-Info headers 

Originally committed as revision 26236 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Martin Storsjö 2011-01-05 21:23:42 +00:00
parent 4cb06874c7
commit 29db7c3af4
1 changed files with 59 additions and 0 deletions
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59
libavformat/rtsp.c
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@ -684,6 +684,61 @@ static void rtsp_parse_transport(RTSPMessageHeader *reply, const char *p)
}
}
static void handle_rtp_info(RTSPState *rt, const char *url,
uint32_t seq, uint32_t rtptime)
{
int i;
if (!rtptime || !url[0])
return;
if (rt->transport != RTSP_TRANSPORT_RTP)
return;
for (i = 0; i < rt->nb_rtsp_streams; i++) {
RTSPStream *rtsp_st = rt->rtsp_streams[i];
RTPDemuxContext *rtpctx = rtsp_st->transport_priv;
if (!rtpctx)
continue;
if (!strcmp(rtsp_st->control_url, url)) {
rtpctx->base_timestamp = rtptime;
break;
}
}
}
static void rtsp_parse_rtp_info(RTSPState *rt, const char *p)
{
int read = 0;
char key[20], value[1024], url[1024] = "";
uint32_t seq = 0, rtptime = 0;
for (;;) {
p += strspn(p, SPACE_CHARS);
if (!*p)
break;
get_word_sep(key, sizeof(key), "=", &p);
if (*p != '=')
break;
p++;
get_word_sep(value, sizeof(value), ";, ", &p);
read++;
if (!strcmp(key, "url"))
av_strlcpy(url, value, sizeof(url));
else if (!strcmp(key, "seq"))
seq = strtol(value, NULL, 10);
else if (!strcmp(key, "rtptime"))
rtptime = strtol(value, NULL, 10);
if (*p == ',') {
handle_rtp_info(rt, url, seq, rtptime);
url[0] = '\0';
seq = rtptime = 0;
read = 0;
}
if (*p)
p++;
}
if (read > 0)
handle_rtp_info(rt, url, seq, rtptime);
}
void ff_rtsp_parse_line(RTSPMessageHeader *reply, const char *buf,
RTSPState *rt, const char *method)
{
@ -728,6 +783,10 @@ void ff_rtsp_parse_line(RTSPMessageHeader *reply, const char *buf,
p += strspn(p, SPACE_CHARS);
if (method && !strcmp(method, "DESCRIBE"))
av_strlcpy(rt->control_uri, p , sizeof(rt->control_uri));
} else if (av_stristart(p, "RTP-Info:", &p) && rt) {
p += strspn(p, SPACE_CHARS);
if (method && !strcmp(method, "PLAY"))
rtsp_parse_rtp_info(rt, p);
}
}