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lvs: add require_feature checks

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Plugins can report what host features they need. Since we start to implement host feature
check which plugins we can no suuport.
This commit is contained in:
Stefan Sauer 2016-05-14 12:34:10 -07:00
parent 2d778881cb
commit 3101fe78f9
3 changed files with 40 additions and 6 deletions
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7
ext/lv2/gstlv2.c
View file

@ -39,6 +39,7 @@
#include <string.h>
#include "gstlv2.h"
#include "gstlv2utils.h"
#include <gst/audio/audio-channels.h>
#include <lv2/lv2plug.in/ns/ext/port-groups/port-groups.h>
@ -64,7 +65,6 @@ lv2_plugin_discover (GstPlugin * plugin)
i = lilv_plugins_next (plugins, i)) {
const LilvPlugin *lv2plugin = lilv_plugins_get (plugins, i);
const gchar *plugin_uri, *p;
LilvNodes *required_features;
gchar *type_name;
GHashTable *port_groups = g_hash_table_new_full (g_str_hash, g_str_equal,
g_free, NULL);
@ -84,11 +84,8 @@ lv2_plugin_discover (GstPlugin * plugin)
goto next;
/* check if we support the required host features */
required_features = lilv_plugin_get_required_features (lv2plugin);
if (required_features) {
if (!gst_lv2_check_required_features (lv2plugin)) {
GST_FIXME ("lv2 plugin %s needs host features", plugin_uri);
// TODO: implement host features, will be passed to
// lilv_plugin_instantiate()
goto next;
}

37
ext/lv2/gstlv2utils.c
View file

@ -22,6 +22,8 @@
#include "config.h"
#endif
#include "string.h"
#include "gstlv2.h"
#include "gstlv2utils.h"
@ -67,6 +69,41 @@ static const LV2_Feature *lv2_features[] = {
NULL
};
gboolean
gst_lv2_check_required_features (const LilvPlugin * lv2plugin)
{
LilvNodes *required_features = lilv_plugin_get_required_features (lv2plugin);
if (required_features) {
LilvIter *i;
gint j;
gboolean missing = FALSE;
for (i = lilv_nodes_begin (required_features);
!lilv_nodes_is_end (required_features, i);
i = lilv_nodes_next (required_features, i)) {
const LilvNode *required_feature = lilv_nodes_get (required_features, i);
const char *required_feature_uri = lilv_node_as_uri (required_feature);
missing = TRUE;
for (j = 0; lv2_features[j]; j++) {
if (!strcmp (lv2_features[j]->URI, required_feature_uri)) {
missing = FALSE;
break;
}
}
if (missing) {
GST_FIXME ("lv2 plugin %s needs host feature: %s",
lilv_node_as_uri (lilv_plugin_get_uri (lv2plugin)),
required_feature_uri);
break;
}
}
lilv_nodes_free (required_features);
return (!missing);
}
return TRUE;
}
/* api helpers */
void

2
ext/lv2/gstlv2utils.h
View file

@ -85,6 +85,7 @@ struct _GstLV2Class
GArray *control_out_ports; /**< Array of GstLV2Port */
};
gboolean gst_lv2_check_required_features (const LilvPlugin *lv2plugin);
void gst_lv2_init (GstLV2 * lv2, GstLV2Class * lv2_class);
void gst_lv2_finalize (GstLV2 * lv2);
@ -92,7 +93,6 @@ void gst_lv2_finalize (GstLV2 * lv2);
gboolean gst_lv2_setup (GstLV2 * lv2, unsigned long rate);
gboolean gst_lv2_cleanup (GstLV2 * lv2, GstObject *obj);
void gst_lv2_object_set_property (GstLV2 * lv2, GObject * object,
guint prop_id, const GValue * value, GParamSpec * pspec);
void gst_lv2_object_get_property (GstLV2 * lv2, GObject * object,