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parse-launch: allow specifying GstElement properties via gst_parse_bin_from_description

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If deserializing a property fails, check if the value type is a string and if so
attempt to create a bin from the string value. This allows to e.g. specify
audio-sink/video-sink for playbin on gst-launch commandline.
This commit is contained in:
Stefan Kost 2009-04-21 11:33:43 +03:00
parent 079c68fdf4
commit 5ce13775b8
1 changed files with 36 additions and 3 deletions
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39
gst/parse/grammar.y
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@ -290,25 +290,44 @@ static void gst_parse_new_child(GstChildProxy *child_proxy, GObject *object,
GType value_type;
if (gst_child_proxy_lookup (GST_OBJECT (set->parent), set->name, &target, &pspec)) {
gboolean got_value = FALSE;
value_type = G_PARAM_SPEC_VALUE_TYPE (pspec);
GST_CAT_LOG (GST_CAT_PIPELINE, "parsing delayed property %s as a %s from %s", pspec->name,
g_type_name (value_type), set->value_str);
g_value_init (&v, value_type);
if (gst_value_deserialize (&v, set->value_str)) {
g_object_set_property (G_OBJECT (target), pspec->name, &v);
if (gst_value_deserialize (&v, set->value_str))
got_value = TRUE;
else if (g_type_is_a (value_type, GST_TYPE_ELEMENT)) {
GstElement *bin;
bin = gst_parse_bin_from_description (set->value_str, TRUE, NULL);
if (bin) {
g_value_set_object (&v, bin);
got_value = TRUE;
}
}
g_signal_handler_disconnect (child_proxy, set->signal_id);
g_free(set->name);
g_free(set->value_str);
g_free(set);
if (!got_value)
goto error;
g_object_set_property (G_OBJECT (target), pspec->name, &v);
}
out:
if (G_IS_VALUE (&v))
g_value_unset (&v);
if (target)
gst_object_unref (target);
return;
error:
GST_CAT_ERROR (GST_CAT_PIPELINE, "could not set property \"%s\" in element \"%s\"",
pspec->name, GST_ELEMENT_NAME (target));
goto out;
}
@ -344,11 +363,25 @@ gst_parse_element_set (gchar *value, GstElement *element, graph_t *graph)
gst_parse_unescape (pos);
if (gst_child_proxy_lookup (GST_OBJECT (element), value, &target, &pspec)) {
gboolean got_value = FALSE;
value_type = G_PARAM_SPEC_VALUE_TYPE (pspec);
GST_CAT_LOG (GST_CAT_PIPELINE, "parsing property %s as a %s", pspec->name,
g_type_name (value_type));
g_value_init (&v, value_type);
if (!gst_value_deserialize (&v, pos))
if (gst_value_deserialize (&v, pos))
got_value = TRUE;
else if (g_type_is_a (value_type, GST_TYPE_ELEMENT)) {
GstElement *bin;
bin = gst_parse_bin_from_description (pos, TRUE, NULL);
if (bin) {
g_value_set_object (&v, bin);
got_value = TRUE;
}
}
if (!got_value)
goto error;
g_object_set_property (G_OBJECT (target), pspec->name, &v);
} else {