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rtsp: Support multicast source filters (RFC 4570)

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This supports inclusion of one single IP address for now,
at the media level. Specifying the filter at the session level
(instead of at the media level), multiple source addresses,
exclusion, or using FQDNs instead of plain IP addresses is not
supported (yet at least).

Signed-off-by: Martin Storsjö <martin@martin.st>
This commit is contained in:
Ed Torbett 2013-06-27 08:53:00 +01:00 committed by Martin Storsjö
parent 4d97ca040b
commit 36fb0d02a1
2 changed files with 19 additions and 0 deletions
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18
libavformat/rtsp.c
View File

@ -495,6 +495,22 @@ static void sdp_parse_line(AVFormatContext *s, SDPParseState *s1,
p += strspn(p, SPACE_CHARS);
if (av_strstart(p, "inline:", &p))
get_word(rtsp_st->crypto_params, sizeof(rtsp_st->crypto_params), &p);
} else if (av_strstart(p, "source-filter:", &p) && s->nb_streams > 0) {
get_word(buf1, sizeof(buf1), &p);
if (strcmp(buf1, "incl"))
return;
get_word(buf1, sizeof(buf1), &p);
if (strcmp(buf1, "IN") != 0)
return;
get_word(buf1, sizeof(buf1), &p);
if (strcmp(buf1, "IP4") && strcmp(buf1, "IP6"))
return;
// not checking that the destination address actually matches
get_word(buf1, sizeof(buf1), &p);
rtsp_st = rt->rtsp_streams[rt->nb_rtsp_streams - 1];
get_word(rtsp_st->source_addr, sizeof(rtsp_st->source_addr), &p);
} else {
if (rt->server_type == RTSP_SERVER_WMS)
ff_wms_parse_sdp_a_line(s, p);
@ -2085,6 +2101,8 @@ static int sdp_read_header(AVFormatContext *s)
"?localport=%d&ttl=%d&connect=%d", rtsp_st->sdp_port,
rtsp_st->sdp_ttl,
rt->rtsp_flags & RTSP_FLAG_FILTER_SRC ? 1 : 0);
if (rtsp_st->source_addr[0])
av_strlcatf(url, sizeof(url), "&sources=%s", rtsp_st->source_addr);
if (ffurl_open(&rtsp_st->rtp_handle, url, AVIO_FLAG_READ_WRITE,
&s->interrupt_callback, NULL) < 0) {
err = AVERROR_INVALIDDATA;

1
libavformat/rtsp.h
View File

@ -425,6 +425,7 @@ typedef struct RTSPStream {
//@{
int sdp_port; /**< port (from SDP content) */
struct sockaddr_storage sdp_ip; /**< IP address (from SDP content) */
char source_addr[100]; /**< Source-specific multicast source IP address (from SDP content) */
int sdp_ttl; /**< IP Time-To-Live (from SDP content) */
int sdp_payload_type; /**< payload type */
//@}