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Skip m= blocks in the SDP if the media type is unknown. This prevents 

subsequent a= lines from the m= block to be applied to the previous
m= line, thus breaking otherwise functional RTP streams. See discussion in
[PATCH] RTSP-MS 7/15: parse and allow unknown m= line codes" thread on
mailinglist.

Originally committed as revision 16737 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Ronald S. Bultje 2009-01-24 04:56:18 +00:00
parent ce71d83ede
commit cb760a4790
1 changed files with 5 additions and 0 deletions
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5
libavformat/rtsp.c
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@ -325,6 +325,7 @@ typedef struct SDPParseState {
/* SDP only */
struct in_addr default_ip;
int default_ttl;
int skip_media; ///< set if an unknown m= line occurs
} SDPParseState;
static void sdp_parse_line(AVFormatContext *s, SDPParseState *s1,
@ -345,6 +346,8 @@ static void sdp_parse_line(AVFormatContext *s, SDPParseState *s1,
#endif
p = buf;
if (s1->skip_media && letter != 'm')
return;
switch(letter) {
case 'c':
get_word(buf1, sizeof(buf1), &p);
@ -383,12 +386,14 @@ static void sdp_parse_line(AVFormatContext *s, SDPParseState *s1,
break;
case 'm':
/* new stream */
s1->skip_media = 0;
get_word(st_type, sizeof(st_type), &p);
if (!strcmp(st_type, "audio")) {
codec_type = CODEC_TYPE_AUDIO;
} else if (!strcmp(st_type, "video")) {
codec_type = CODEC_TYPE_VIDEO;
} else {
s1->skip_media = 1;
return;
}
rtsp_st = av_mallocz(sizeof(RTSPStream));