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Allow cycling between different protocols (TCP, UDP or multicast) so that if

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one doesn't work, we can try the next one (i.e. trial-error protocol auto-
probing).

Discussed and approved in "[PATCH] RTSP alternate protocol 2-3/3".

Originally committed as revision 12504 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Ronald S. Bultje 2008-03-19 14:05:08 +00:00
parent b58412f106
commit 8a8754d80f
2 changed files with 26 additions and 3 deletions
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25
libavformat/rtsp.c
View File

@ -922,6 +922,10 @@ make_setup_request (AVFormatContext *s, const char *host, int port, int protocol
"Transport: %s\r\n",
rtsp_st->control_url, transport);
rtsp_send_cmd(s, cmd, reply, NULL);
if (reply->status_code == 461 /* Unsupported protocol */ && i == 0) {
err = 1;
goto fail;
} else
if (reply->status_code != RTSP_STATUS_OK ||
reply->nb_transports != 1) {
err = AVERROR_INVALIDDATA;
@ -1003,6 +1007,12 @@ make_setup_request (AVFormatContext *s, const char *host, int port, int protocol
return 0;
fail:
for (i=0; i<rt->nb_rtsp_streams; i++) {
if (rt->rtsp_streams[i]->rtp_handle) {
url_close(rt->rtsp_streams[i]->rtp_handle);
rt->rtsp_streams[i]->rtp_handle = NULL;
}
}
return err;
}
@ -1045,7 +1055,7 @@ static int rtsp_read_header(AVFormatContext *s,
}
if (!protocol_mask)
protocol_mask = rtsp_default_protocols;
protocol_mask = (1 << RTSP_PROTOCOL_RTP_LAST) - 1;
/* open the tcp connexion */
snprintf(tcpname, sizeof(tcpname), "tcp://%s:%d", host, port);
@ -1077,9 +1087,18 @@ static int rtsp_read_header(AVFormatContext *s,
goto fail;
}
err = make_setup_request(s, host, port, protocol_mask);
if (err)
do {
int protocol = protocol_mask & ~(protocol_mask - 1);
err = make_setup_request(s, host, port, protocol);
if (err < 0)
goto fail;
protocol_mask &= ~protocol;
if (protocol_mask == 0 && err == 1) {
err = AVERROR(EPROTONOSUPPORT);
goto fail;
}
} while (err);
rt->state = RTSP_STATE_IDLE;
rt->seek_timestamp = 0; /* default is to start stream at position

4
libavformat/rtsp.h
View File

@ -29,6 +29,10 @@ enum RTSPProtocol {
RTSP_PROTOCOL_RTP_UDP = 0,
RTSP_PROTOCOL_RTP_TCP = 1,
RTSP_PROTOCOL_RTP_UDP_MULTICAST = 2,
/**
* This is not part of public API and shouldn't be used outside of ffmpeg.
*/
RTSP_PROTOCOL_RTP_LAST
};
#define RTSP_DEFAULT_PORT 554