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sdp: Parse rtcp-fb media attributes

Browse source 
https://bugzilla.gnome.org/show_bug.cgi?id=769698
This commit is contained in:
Tomasz Zajac 2016-10-28 08:47:01 +02:00 committed by Sebastian Dröge
parent 5424357ffa
commit 4d4f3c3cc4
1 changed files with 70 additions and 0 deletions
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70
gst-libs/gst/sdp/gstsdpmessage.c
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@ -3270,6 +3270,73 @@ gst_sdp_parse_rtpmap (const gchar * rtpmap, gint * payload, gchar ** name,
return TRUE;
}
/**
* gst_sdp_media_add_rtcp_fb_attributes_from_media:
* @media: a #GstSDPMedia
* @pt: payload type
* @caps: a #GstCaps
*
* Parse given @media for "rtcp-fb" attributes and add it to the @caps.
*
* Mapping of caps from SDP fields:
*
* a=rtcp-fb:(payload) (param1) [param2]...
*
* Returns: a #GstSDPResult.
*/
static GstSDPResult
gst_sdp_media_add_rtcp_fb_attributes_from_media (const GstSDPMedia * media,
gint pt, GstCaps * caps)
{
const gchar *rtcp_fb;
gchar *p, *to_free;
gint payload, i;
GstStructure *s;
g_return_val_if_fail (media != NULL, GST_SDP_EINVAL);
g_return_val_if_fail (caps != NULL && GST_IS_CAPS (caps), GST_SDP_EINVAL);
s = gst_caps_get_structure (caps, 0);
for (i = 0;; i++) {
gboolean all_formats = FALSE;
if ((rtcp_fb = gst_sdp_media_get_attribute_val_n (media,
"rtcp-fb", i)) == NULL)
break;
/* p is now of the format <payload> attr... */
to_free = p = g_strdup (rtcp_fb);
/* check if it applies to all formats */
if (*p == '*') {
p++;
all_formats = TRUE;
} else {
PARSE_INT (p, " ", payload);
}
if (all_formats || (payload != -1 && payload == pt)) {
gchar *tmp, *key;
SKIP_SPACES (p);
/* replace space with '-' */
key = g_strdup_printf ("rtcp-fb-%s", p);
for (tmp = key; (tmp = strchr (tmp, ' ')); ++tmp) {
*tmp = '-';
}
gst_structure_set (s, key, G_TYPE_BOOLEAN, TRUE, NULL);
GST_DEBUG ("adding caps: %s=TRUE", key);
g_free (key);
} else
g_free (to_free);
}
return GST_SDP_OK;
}
/**
* gst_sdp_media_get_caps_from_media:
* @media: a #GstSDPMedia
@ -3439,6 +3506,9 @@ gst_sdp_media_get_caps_from_media (const GstSDPMedia * media, gint pt)
}
}
/* parse rtcp-fb: field */
gst_sdp_media_add_rtcp_fb_attributes_from_media (media, pt, caps);
return caps;
/* ERRORS */