mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-06-29 03:10:40 +00:00
sdp: support multiple rid parameters
As specified formally in RFC8851 Each rid description is placed in its own caps field in the structure. This is very similar to the already existing extmap-$id sdp<->caps transformations that already exists. The mapping is as follows: a=rid:0 direction ';'-separated params where direction is either 'send' or 'recv' gets put into a caps structure like so: rid-0=(string)<"direction","param1","param2",etc> If there are no rid parameters then the caps structure is generated to only contain the direction as a single string like: rid-0=(string)direction Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/1760>
This commit is contained in:
Matthew Waters
GStreamer Marge Bot
parent
f8016687a4
commit
207769edbb
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@ -3991,6 +3991,52 @@ gst_sdp_media_set_media_from_caps (const GstCaps * caps, GstSDPMedia * media)
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continue;
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}
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/* rid values */
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if (g_str_has_prefix (fname, "rid-")) {
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const char *rid_id = &fname[strlen ("rid-")];
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const GValue *arr;
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if (!rid_id || !*rid_id)
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continue;
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if ((fval = gst_structure_get_string (s, fname))) {
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char *rid_val = g_strdup_printf ("%s %s", rid_id, fval);
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gst_sdp_media_add_attribute (media, "rid", rid_val);
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g_free (rid_val);
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} else if ((arr = gst_structure_get_value (s, fname))
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&& GST_VALUE_HOLDS_ARRAY (arr)
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&& gst_value_array_get_size (arr) > 1) {
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const gchar *direction, *param;
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GString *str;
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guint i, n;
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str = g_string_new (NULL);
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g_string_append_printf (str, "%s ", rid_id);
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n = gst_value_array_get_size (arr);
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for (i = 0; i < n; i++) {
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const GValue *val = gst_value_array_get_value (arr, i);
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if (i == 0) {
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direction = g_value_get_string (val);
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g_string_append_printf (str, "%s", direction);
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} else {
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param = g_value_get_string (val);
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if (i == 1)
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g_string_append_c (str, ' ');
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else
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g_string_append_c (str, ';');
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g_string_append_printf (str, "%s", param);
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}
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}
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gst_sdp_media_add_attribute (media, "rid", str->str);
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g_string_free (str, TRUE);
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} else {
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GST_WARNING ("caps field %s is an unsupported format", fname);
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}
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continue;
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}
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if ((fval = gst_structure_get_string (s, fname))) {
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/* "profile" is our internal representation of the notion of
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@ -4170,6 +4216,8 @@ sdp_add_attributes_to_caps (GArray * attributes, GstCaps * caps)
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continue;
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if (!strcmp (key, "extmap"))
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continue;
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if (!strcmp (key, "rid"))
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continue;
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/* string must be valid UTF8 */
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if (!g_utf8_validate (attr->value, -1, NULL))
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@ -4295,6 +4343,138 @@ gst_sdp_media_add_extmap_attributes (GArray * attributes, GstCaps * caps)
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return GST_SDP_OK;
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}
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/* parses RID SDP attributes (RFC8851) into caps */
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static GstSDPResult
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gst_sdp_media_add_rid_attributes (GArray * attributes, GstCaps * caps)
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{
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const gchar *rid;
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char *p, *to_free;
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guint i;
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GstStructure *s;
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g_return_val_if_fail (attributes != NULL, GST_SDP_EINVAL);
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g_return_val_if_fail (caps != NULL && GST_IS_CAPS (caps), GST_SDP_EINVAL);
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g_return_val_if_fail (gst_caps_is_writable (caps), GST_SDP_EINVAL);
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s = gst_caps_get_structure (caps, 0);
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for (i = 0; i < attributes->len; i++) {
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GstSDPAttribute *attr;
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const char *direction, *params, *id;
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const char *tmp;
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attr = &g_array_index (attributes, GstSDPAttribute, i);
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if (strcmp (attr->key, "rid") != 0)
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continue;
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rid = attr->value;
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/* p is now of the format id dir ;-separated-params */
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to_free = p = g_strdup (rid);
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PARSE_STRING (p, " ", id);
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if (id == NULL || *id == '\0') {
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GST_ERROR ("Invalid rid \'%s\'", to_free);
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goto next;
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}
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tmp = id;
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while (*tmp && (*tmp == '-' || *tmp == '_' || g_ascii_isalnum (*tmp)))
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tmp++;
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if (*tmp != '\0') {
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GST_ERROR ("Invalid rid-id \'%s\'", id);
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goto next;
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}
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SKIP_SPACES (p);
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PARSE_STRING (p, " ", direction);
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if (direction == NULL || *direction == '\0') {
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direction = p;
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params = NULL;
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} else {
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SKIP_SPACES (p);
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params = p;
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}
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if (direction == NULL || *direction == '\0'
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|| (g_strcmp0 (direction, "send") != 0
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&& g_strcmp0 (direction, "recv") != 0)) {
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GST_ERROR ("Invalid rid direction \'%s\'", p);
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goto next;
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}
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if (params && *params != '\0') {
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GValue arr = G_VALUE_INIT;
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GValue val = G_VALUE_INIT;
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gchar *key;
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#if !defined(GST_DISABLE_DEBUG)
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GString *debug_params = g_string_new (NULL);
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int i = 0;
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#endif
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key = g_strdup_printf ("rid-%s", id);
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g_value_init (&arr, GST_TYPE_ARRAY);
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g_value_init (&val, G_TYPE_STRING);
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g_value_set_string (&val, direction);
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gst_value_array_append_and_take_value (&arr, &val);
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val = (GValue) G_VALUE_INIT;
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while (*p) {
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const char *param;
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gboolean done = FALSE;
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PARSE_STRING (p, ";", param);
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if (param) {
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} else if (*p) {
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param = p;
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done = TRUE;
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} else {
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break;
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}
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g_value_init (&val, G_TYPE_STRING);
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g_value_set_string (&val, param);
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gst_value_array_append_and_take_value (&arr, &val);
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val = (GValue) G_VALUE_INIT;
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#if !defined(GST_DISABLE_DEBUG)
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if (i++ > 0)
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g_string_append_c (debug_params, ',');
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g_string_append (debug_params, param);
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#endif
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if (done)
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break;
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}
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gst_structure_take_value (s, key, &arr);
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arr = (GValue) G_VALUE_INIT;
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#if !defined(GST_DISABLE_DEBUG)
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{
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char *debug_str = g_string_free (debug_params, FALSE);
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GST_DEBUG ("adding caps: %s=<%s,%s>", key, direction, debug_str);
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g_free (debug_str);
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}
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#endif
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g_free (key);
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} else {
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gchar *key;
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key = g_strdup_printf ("rid-%s", id);
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gst_structure_set (s, key, G_TYPE_STRING, direction, NULL);
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GST_DEBUG ("adding caps: %s=%s", key, direction);
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g_free (key);
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}
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next:
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g_clear_pointer (&to_free, g_free);
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}
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return GST_SDP_OK;
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}
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/**
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* gst_sdp_message_attributes_to_caps:
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* @msg: a #GstSDPMessage
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@ -4371,6 +4551,11 @@ gst_sdp_media_attributes_to_caps (const GstSDPMedia * media, GstCaps * caps)
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res = gst_sdp_media_add_extmap_attributes (media->attributes, caps);
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}
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if (res == GST_SDP_OK) {
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/* parse media rid fields */
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res = gst_sdp_media_add_rid_attributes (media->attributes, caps);
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}
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done:
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if (mikey)
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gst_mikey_message_unref (mikey);
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@ -182,6 +182,19 @@ static const gchar caps_application_raptor_fec_pt_110[] =
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"raptor-scheme-id=(string)1, kmax=(string)8192, t=(string)128, p=(string)A, repair-window=(string)200000, "
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"a-mid=(string)R1";
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static const gchar caps_multiple_rid[] =
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"application/x-unknown, media=(string)video, payload=(int)96, "
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"clock-rate=(int)90000, encoding-name=(string)VP8, "
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"rid-h=(string)\"send\", "
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"rid-m=(string)\"send\", "
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"rid-l=(string)\"send\", "
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"a-simulcast=(string)\"send\\ h\\;m\\;l\"";
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static const gchar caps_rid_params[] =
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"application/x-unknown, media=(string)video, payload=(int)96, "
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"clock-rate=(int)90000, encoding-name=(string)VP8, "
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"rid-0=(string)<\"send\",\"max-width=1920\",\"max-height=1080\">, "
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"rid-1=(string)<\"send\",\"max-width=1280\",\"max-height=720\">";
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/* *INDENT-ON* */
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@ -758,6 +771,132 @@ GST_START_TEST (media_from_caps_h264_with_profile_asymmetry_allowed)
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gst_sdp_message_free (message);
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}
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GST_END_TEST
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GST_START_TEST (caps_multiple_rid_parse)
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{
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GstSDPMedia media, media2;
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GstCaps *caps, *expected;
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/* BUG: gst_sdp_media_add_attributes_to_caps() would only set a single rid
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* string attribute key/value in caps */
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memset (&media, 0, sizeof (media));
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fail_unless_equals_int (gst_sdp_media_init (&media), GST_SDP_OK);
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fail_unless_equals_int (GST_SDP_OK,
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gst_sdp_media_set_media (&media, "video"));
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fail_unless_equals_int (GST_SDP_OK, gst_sdp_media_add_format (&media, "96"));
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fail_unless_equals_int (GST_SDP_OK,
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gst_sdp_media_add_attribute (&media, "rtpmap", "96 VP8/90000"));
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fail_unless_equals_int (GST_SDP_OK,
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gst_sdp_media_add_attribute (&media, "rid", "h send"));
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fail_unless_equals_int (GST_SDP_OK,
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gst_sdp_media_add_attribute (&media, "rid", "m send"));
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fail_unless_equals_int (GST_SDP_OK,
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gst_sdp_media_add_attribute (&media, "rid", "l send"));
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fail_unless_equals_int (GST_SDP_OK,
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gst_sdp_media_add_attribute (&media, "simulcast", "send h;m;l"));
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expected = gst_caps_from_string (caps_multiple_rid);
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fail_unless (gst_caps_is_fixed (expected));
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fail_unless (expected != NULL);
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caps = gst_sdp_media_get_caps_from_media (&media, 96);
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fail_unless (caps != NULL);
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fail_unless_equals_int (GST_SDP_OK,
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gst_sdp_media_attributes_to_caps (&media, caps));
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fail_unless (gst_caps_is_fixed (caps));
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GST_DEBUG (" caps %" GST_PTR_FORMAT, caps);
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GST_DEBUG ("expected %" GST_PTR_FORMAT, expected);
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fail_unless (gst_caps_is_equal (caps, expected));
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memset (&media2, 0, sizeof (media2));
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fail_unless_equals_int (GST_SDP_OK, gst_sdp_media_init (&media2));
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fail_unless_equals_int (GST_SDP_OK,
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gst_sdp_media_set_media_from_caps (caps, &media2));
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gst_clear_caps (&caps);
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caps = gst_sdp_media_get_caps_from_media (&media, 96);
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fail_unless (caps != NULL);
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fail_unless_equals_int (GST_SDP_OK,
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gst_sdp_media_attributes_to_caps (&media, caps));
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fail_unless (gst_caps_is_fixed (caps));
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GST_DEBUG (" caps %" GST_PTR_FORMAT, caps);
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GST_DEBUG ("expected %" GST_PTR_FORMAT, expected);
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fail_unless (gst_caps_is_equal (caps, expected));
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gst_sdp_media_uninit (&media);
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gst_sdp_media_uninit (&media2);
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gst_clear_caps (&caps);
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gst_clear_caps (&expected);
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}
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GST_END_TEST
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GST_START_TEST (caps_multiple_rid_parse_with_params)
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{
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GstSDPMedia media, media2;
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GstCaps *caps, *expected;
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/* BUG: gst_sdp_media_add_attributes_to_caps() would only set a single rid
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* string attribute key/value in caps */
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memset (&media, 0, sizeof (media));
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fail_unless_equals_int (gst_sdp_media_init (&media), GST_SDP_OK);
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fail_unless_equals_int (GST_SDP_OK,
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gst_sdp_media_set_media (&media, "video"));
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fail_unless_equals_int (GST_SDP_OK, gst_sdp_media_add_format (&media, "96"));
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fail_unless_equals_int (GST_SDP_OK,
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gst_sdp_media_add_attribute (&media, "rtpmap", "96 VP8/90000"));
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fail_unless_equals_int (GST_SDP_OK,
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gst_sdp_media_add_attribute (&media, "rid",
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"0 send max-width=1920;max-height=1080"));
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fail_unless_equals_int (GST_SDP_OK,
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gst_sdp_media_add_attribute (&media, "rid",
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"1 send max-width=1280;max-height=720"));
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expected = gst_caps_from_string (caps_rid_params);
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fail_unless (gst_caps_is_fixed (expected));
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fail_unless (expected != NULL);
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caps = gst_sdp_media_get_caps_from_media (&media, 96);
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fail_unless (caps != NULL);
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fail_unless_equals_int (GST_SDP_OK,
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gst_sdp_media_attributes_to_caps (&media, caps));
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fail_unless (gst_caps_is_fixed (caps));
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GST_DEBUG (" caps %" GST_PTR_FORMAT, caps);
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GST_DEBUG ("expected %" GST_PTR_FORMAT, expected);
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fail_unless (gst_caps_is_equal (caps, expected));
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memset (&media2, 0, sizeof (media2));
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fail_unless_equals_int (GST_SDP_OK, gst_sdp_media_init (&media2));
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fail_unless_equals_int (GST_SDP_OK,
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gst_sdp_media_set_media_from_caps (caps, &media2));
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gst_clear_caps (&caps);
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caps = gst_sdp_media_get_caps_from_media (&media, 96);
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fail_unless (caps != NULL);
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fail_unless_equals_int (GST_SDP_OK,
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gst_sdp_media_attributes_to_caps (&media, caps));
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fail_unless (gst_caps_is_fixed (caps));
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GST_DEBUG (" caps %" GST_PTR_FORMAT, caps);
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GST_DEBUG ("expected %" GST_PTR_FORMAT, expected);
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fail_unless (gst_caps_is_equal (caps, expected));
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gst_sdp_media_uninit (&media);
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gst_sdp_media_uninit (&media2);
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gst_clear_caps (&caps);
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gst_clear_caps (&expected);
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}
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GST_END_TEST
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/*
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* End of test cases
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@ -785,6 +924,8 @@ sdp_suite (void)
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tcase_add_test (tc_chain, media_from_caps_extmap_pt_100);
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tcase_add_test (tc_chain,
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media_from_caps_h264_with_profile_asymmetry_allowed);
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tcase_add_test (tc_chain, caps_multiple_rid_parse);
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tcase_add_test (tc_chain, caps_multiple_rid_parse_with_params);
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return s;
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}
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