avformat/rtsp: allow receiving subtitles via RTP

Reviewed-by: Thomas Volkert <silvo@gmx.net>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

libavformat/rtsp.c

@@ -68,10 +68,11 @@
     { "filter_src", "only receive packets from the negotiated peer IP", 0, AV_OPT_TYPE_CONST, {.i64 = RTSP_FLAG_FILTER_SRC}, 0, 0, DEC, "rtsp_flags" }
 
 #define RTSP_MEDIATYPE_OPTS(name, longname) \
-    { name, longname, OFFSET(media_type_mask), AV_OPT_TYPE_FLAGS, { .i64 = (1 << (AVMEDIA_TYPE_DATA+1)) - 1 }, INT_MIN, INT_MAX, DEC, "allowed_media_types" }, \
+    { name, longname, OFFSET(media_type_mask), AV_OPT_TYPE_FLAGS, { .i64 = (1 << (AVMEDIA_TYPE_SUBTITLE+1)) - 1 }, INT_MIN, INT_MAX, DEC, "allowed_media_types" }, \
     { "video", "Video", 0, AV_OPT_TYPE_CONST, {.i64 = 1 << AVMEDIA_TYPE_VIDEO}, 0, 0, DEC, "allowed_media_types" }, \
     { "audio", "Audio", 0, AV_OPT_TYPE_CONST, {.i64 = 1 << AVMEDIA_TYPE_AUDIO}, 0, 0, DEC, "allowed_media_types" }, \
-    { "data", "Data", 0, AV_OPT_TYPE_CONST, {.i64 = 1 << AVMEDIA_TYPE_DATA}, 0, 0, DEC, "allowed_media_types" }
+    { "data", "Data", 0, AV_OPT_TYPE_CONST, {.i64 = 1 << AVMEDIA_TYPE_DATA}, 0, 0, DEC, "allowed_media_types" }, \
+    { "subtitle", "Subtitle", 0, AV_OPT_TYPE_CONST, {.i64 = 1 << AVMEDIA_TYPE_SUBTITLE}, 0, 0, DEC, "allowed_media_types" }
 
 #define RTSP_REORDERING_OPTS() \
     { "reorder_queue_size", "set number of packets to buffer for handling of reordered packets", OFFSET(reordering_queue_size), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, INT_MAX, DEC }
@@ -399,6 +400,8 @@ static void sdp_parse_line(AVFormatContext *s, SDPParseState *s1,
             codec_type = AVMEDIA_TYPE_VIDEO;
         } else if (!strcmp(st_type, "application")) {
             codec_type = AVMEDIA_TYPE_DATA;
+        } else if (!strcmp(st_type, "text")) {
+            codec_type = AVMEDIA_TYPE_SUBTITLE;
         }
         if (codec_type == AVMEDIA_TYPE_UNKNOWN || !(rt->media_type_mask & (1 << codec_type))) {
             s1->skip_media = 1;
@@ -2372,7 +2375,7 @@ static int rtp_read_header(AVFormatContext *s)
     /* sdp_read_header initializes this again */
     ff_network_close();
 
-    rt->media_type_mask = (1 << (AVMEDIA_TYPE_DATA+1)) - 1;
+    rt->media_type_mask = (1 << (AVMEDIA_TYPE_SUBTITLE+1)) - 1;
 
     ret = sdp_read_header(s);
     s->pb = NULL;