rtsp-sdp: Parse framerate caps field and set SDP attribute

The SDP attribute and its format is described in RFC4566.

Fixes https://bugzilla.gnome.org/show_bug.cgi?id=700747

diff --git a/gst/rtsp-server/rtsp-sdp.c b/gst/rtsp-server/rtsp-sdp.c
index 67f031b..6b0a046 100644 (file)
--- a/gst/rtsp-server/rtsp-sdp.c
+++ b/gst/rtsp-server/rtsp-sdp.c
@@ -101,6 +101,7 @@ gst_rtsp_sdp_from_media (GstSDPMessage * sdp, GstSDPInfo * info,
     GString *fmtp;
     GstCaps *caps;
     gint width, height;
+    gint num = 0, denom = 1;
 
     stream = gst_rtsp_media_get_stream (media, i);
     caps = gst_rtsp_stream_get_caps (stream);
@@ -163,6 +164,16 @@ gst_rtsp_sdp_from_media (GstSDPMessage * sdp, GstSDPInfo * info,
       g_free (tmp);
     }
 
+    /* create framerate SDP attribute if frame is not zero */
+    if (gst_structure_get_fraction (s, "framerate", &num, &denom) && num > 0) {
+      gdouble rate;
+      gchar framerate [G_ASCII_DTOSTR_BUF_SIZE];
+
+      gst_util_fraction_to_double (num, denom, &rate);
+      g_ascii_formatd (framerate, sizeof (framerate), " %.17g", rate);
+      gst_sdp_media_add_attribute (smedia, "framerate", framerate);
+    }
+
     /* the config uri */
     tmp = g_strdup_printf ("stream=%d", i);
     gst_sdp_media_add_attribute (smedia, "control", tmp);
@@ -199,6 +210,8 @@ gst_rtsp_sdp_from_media (GstSDPMessage * sdp, GstSDPInfo * info,
         continue;
       if (!strcmp (fname, "height"))
         continue;
+      if (!strcmp (fname, "framerate"))
+        continue;
 
       if ((fval = gst_structure_get_string (s, fname))) {
         g_string_append_printf (fmtp, "%s%s=%s", first ? "" : ";", fname, fval);