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effect: Create ghost pads ourself

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As we can have effects with several pads and the default ghosting
doesn't allow that.

This way we also filter the pads to ghost to match our track type.
This commit is contained in:
Thibault Saunier 2018-11-23 11:22:03 -03:00
parent 8cf4605b92
commit f1baf1a739
1 changed files with 56 additions and 4 deletions
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60
ges/ges-effect.c
View file

@ -239,11 +239,45 @@ ges_effect_finalize (GObject * object)
G_OBJECT_CLASS (ges_effect_parent_class)->finalize (object);
}
static void
ghost_compatible_pads (GstElement * bin, GstElement * child,
GstCaps * valid_caps, gint * n_src, gint * n_sink)
{
GList *tmp;
for (tmp = child->pads; tmp; tmp = tmp->next) {
GstCaps *caps;
GstPad *pad = tmp->data;
if (GST_PAD_PEER (pad))
continue;
caps = gst_pad_query_caps (pad, NULL);
if (gst_caps_can_intersect (caps, valid_caps)) {
gchar *name =
g_strdup_printf ("%s_%d", GST_PAD_IS_SINK (pad) ? "sink" : "src",
GST_PAD_IS_SINK (pad) ? *n_sink++ : *n_src++);
GST_DEBUG_OBJECT (bin, "Ghosting pad: %" GST_PTR_FORMAT, pad);
gst_element_add_pad (GST_ELEMENT (bin), gst_ghost_pad_new (name, pad));
g_free (name);
} else {
GST_DEBUG_OBJECT (pad, "Can't ghost pad %" GST_PTR_FORMAT, caps);
}
gst_caps_unref (caps);
}
}
static GstElement *
ges_effect_create_element (GESTrackElement * object)
{
GList *tmp;
GstElement *effect;
gchar *bin_desc;
GstCaps *valid_caps;
gint n_src = 0, n_sink = 0;
GError *error = NULL;
GESEffect *self = GES_EFFECT (object);
@ -256,29 +290,47 @@ ges_effect_create_element (GESTrackElement * object)
bin_desc = g_strconcat ("videoconvert name=pre_video_convert ! ",
self->priv->bin_description, " ! videoconvert name=post_video_convert",
NULL);
valid_caps = gst_caps_from_string ("video/x-raw(ANY)");
} else if (type == GES_TRACK_TYPE_AUDIO) {
bin_desc =
g_strconcat ("audioconvert ! audioresample !",
self->priv->bin_description, NULL);
valid_caps = gst_caps_from_string ("audio/x-raw(ANY)");
} else {
g_assert_not_reached ();
}
effect = gst_parse_bin_from_description (bin_desc, TRUE, &error);
effect = gst_parse_bin_from_description (bin_desc, FALSE, &error);
g_free (bin_desc);
if (error != NULL) {
GST_ERROR ("An error occured while creating the GstElement: %s",
error->message);
g_error_free (error);
return NULL;
goto fail;
}
for (tmp = GST_BIN_CHILDREN (effect); tmp; tmp = tmp->next) {
ghost_compatible_pads (effect, tmp->data, valid_caps, &n_src, &n_sink);
if (n_src > 1) {
GST_ERROR ("More than 1 source pad in the effect, that is not possible");
goto fail;
}
}
ges_track_element_add_children_props (object, effect, NULL,
blacklisted_factories, NULL);
done:
gst_clear_caps (&valid_caps);
return effect;
fail:
gst_clear_object (&effect);
goto done;
}
/**