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lv2: generate enums from scalepoints
Plugins can provide a set of named values for a control port. Ideally only those values are set for the property. Check if all scalepoints are integers and if so generate an enum type.
This commit is contained in:
Stefan Sauer
parent
5aee046876
commit
04a957c9b8
2 changed files with 94 additions and 8 deletions
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@ -9,6 +9,7 @@ Features:
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The plugin wrapper support the following plugin features:
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http://lv2plug.in/ns/lv2core
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http://lv2plug.in/ns/ext/event
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http://lv2plug.in/ns/ext/port-groups
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and these host features:
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@ -37,10 +38,11 @@ TODO
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- these ports need a buffer with the property value
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- we should sync, then fill the buffer and connect the port
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* support presets
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for pl in $(lv2ls); do if test "$(lv2info "$pl" | grep -A1 "Presets:" | tail -n1)" != ""; then echo "$pl"; fi; done
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* support more host features
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GST_DEBUG="lv2:4" GST_DEBUG_FILE=/tmp/gst.log gst-inspect lv2
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grep -o "needs host feature: .*$" /tmp/gst.log | sort | uniq -c | sort -n
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* samples sources:
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* example sources:
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http://svn.drobilla.net/lad/trunk/lilv/utils/lv2info.c
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http://svn.drobilla.net/lad/trunk/jalv/src/jalv.c
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@ -23,6 +23,7 @@
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#endif
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#include "string.h"
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#include "stdlib.h"
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#include "gstlv2.h"
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#include "gstlv2utils.h"
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@ -212,14 +213,18 @@ void
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gst_lv2_object_set_property (GstLV2 * lv2, GObject * object,
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guint prop_id, const GValue * value, GParamSpec * pspec)
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{
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GType base, type = pspec->value_type;
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/* remember, properties have an offset */
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prop_id -= lv2->klass->properties;
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/* only input ports */
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g_return_if_fail (prop_id < lv2->klass->control_in_ports->len);
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while ((base = g_type_parent (type)))
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type = base;
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/* now see what type it is */
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switch (pspec->value_type) {
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switch (type) {
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case G_TYPE_BOOLEAN:
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lv2->ports.control.in[prop_id] =
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g_value_get_boolean (value) ? 0.0f : 1.0f;
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@ -230,6 +235,9 @@ gst_lv2_object_set_property (GstLV2 * lv2, GObject * object,
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case G_TYPE_FLOAT:
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lv2->ports.control.in[prop_id] = g_value_get_float (value);
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break;
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case G_TYPE_ENUM:
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lv2->ports.control.in[prop_id] = g_value_get_enum (value);
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break;
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default:
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GST_WARNING_OBJECT (object, "unhandled type: %s",
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g_type_name (pspec->value_type));
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@ -241,6 +249,7 @@ void
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gst_lv2_object_get_property (GstLV2 * lv2, GObject * object,
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guint prop_id, GValue * value, GParamSpec * pspec)
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{
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GType base, type = pspec->value_type;
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gfloat *controls;
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/* remember, properties have an offset */
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@ -256,8 +265,11 @@ gst_lv2_object_get_property (GstLV2 * lv2, GObject * object,
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g_return_if_reached ();
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}
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while ((base = g_type_parent (type)))
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type = base;
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/* now see what type it is */
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switch (pspec->value_type) {
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switch (type) {
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case G_TYPE_BOOLEAN:
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g_value_set_boolean (value, controls[prop_id] > 0.0f);
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break;
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@ -267,6 +279,9 @@ gst_lv2_object_get_property (GstLV2 * lv2, GObject * object,
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case G_TYPE_FLOAT:
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g_value_set_float (value, controls[prop_id]);
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break;
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case G_TYPE_ENUM:
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g_value_set_enum (value, (gint) controls[prop_id]);
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break;
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default:
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GST_WARNING_OBJECT (object, "unhandled type: %s",
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g_type_name (pspec->value_type));
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@ -321,6 +336,12 @@ gst_lv2_class_get_param_nick (GstLV2Class * klass, const LilvPort * port)
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return g_strdup (lilv_node_as_string (lilv_port_get_name (lv2plugin, port)));
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}
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static int
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enum_val_cmp (GEnumValue * p1, GEnumValue * p2)
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{
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return p1->value - p2->value;
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}
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static GParamSpec *
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gst_lv2_class_get_param_spec (GstLV2Class * klass, GObjectClass * object_class,
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gint portnum)
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@ -328,10 +349,12 @@ gst_lv2_class_get_param_spec (GstLV2Class * klass, GObjectClass * object_class,
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const LilvPlugin *lv2plugin = klass->plugin;
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const LilvPort *port = lilv_plugin_get_port_by_index (lv2plugin, portnum);
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LilvNode *lv2def, *lv2min, *lv2max;
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LilvScalePoints *points;
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GParamSpec *ret;
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gchar *name, *nick;
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gint perms;
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gfloat lower = 0.0f, upper = 1.0f, def = 0.0f;
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GType enum_type = G_TYPE_INVALID;
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nick = gst_lv2_class_get_param_nick (klass, port);
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name = gst_lv2_class_get_param_name (klass, object_class, port);
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@ -365,21 +388,82 @@ gst_lv2_class_get_param_spec (GstLV2Class * klass, GObjectClass * object_class,
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if (def < lower) {
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if (lv2def && lv2min) {
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GST_WARNING ("%s has lower bound %f > default %f",
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lilv_node_as_string (lilv_plugin_get_uri (lv2plugin)), lower, def);
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GST_WARNING ("%s:%s has lower bound %f > default %f",
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lilv_node_as_string (lilv_plugin_get_uri (lv2plugin)), name, lower,
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def);
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}
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lower = def;
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}
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if (def > upper) {
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if (lv2def && lv2max) {
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GST_WARNING ("%s has upper bound %f < default %f",
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lilv_node_as_string (lilv_plugin_get_uri (lv2plugin)), upper, def);
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GST_WARNING ("%s:%s has upper bound %f < default %f",
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lilv_node_as_string (lilv_plugin_get_uri (lv2plugin)), name, upper,
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def);
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}
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upper = def;
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}
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if (lilv_port_has_property (lv2plugin, port, integer_prop))
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if ((points = lilv_port_get_scale_points (lv2plugin, port))) {
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GEnumValue *enums;
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LilvIter *i;
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gint j = 0, n, def_ix = -1;
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n = lilv_scale_points_size (points);
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enums = g_new (GEnumValue, n + 1);
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for (i = lilv_scale_points_begin (points);
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!lilv_scale_points_is_end (points, i);
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i = lilv_scale_points_next (points, i)) {
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const LilvScalePoint *point = lilv_scale_points_get (points, i);
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gfloat v = lilv_node_as_float (lilv_scale_point_get_value (point));
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const gchar *l = lilv_node_as_string (lilv_scale_point_get_label (point));
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/* check if value can be safely converted to int */
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if (v != (gint) v) {
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GST_DEBUG ("non integer scale point %lf, %s", v, l);
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break;
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}
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if (v == def) {
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def_ix = j;
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}
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enums[j].value = (gint) v;
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enums[j].value_nick = enums[j].value_name = l;
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GST_DEBUG ("%s:%s enum: %lf, %s",
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lilv_node_as_string (lilv_plugin_get_uri (lv2plugin)), name, v, l);
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j++;
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}
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if (j == n) {
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gchar *type_name;
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/* scalepoints are not sorted */
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qsort (enums, n, sizeof (GEnumValue),
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(int (*)(const void *, const void *)) enum_val_cmp);
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if (def_ix == -1) {
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if (lv2def) {
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GST_WARNING ("%s:%s has default %f outside of scalepoints",
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lilv_node_as_string (lilv_plugin_get_uri (lv2plugin)), name, def);
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}
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def = enums[0].value;
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}
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/* terminator */
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enums[j].value = 0;
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enums[j].value_name = enums[j].value_nick = NULL;
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type_name = g_strdup_printf ("%s%s",
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g_type_name (G_TYPE_FROM_CLASS (object_class)), name);
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enum_type = g_enum_register_static (type_name, enums);
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g_free (type_name);
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} else {
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g_free (enums);
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}
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lilv_scale_points_free (points);
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}
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if (enum_type != G_TYPE_INVALID) {
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ret = g_param_spec_enum (name, nick, nick, enum_type, def, perms);
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} else if (lilv_port_has_property (lv2plugin, port, integer_prop))
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ret = g_param_spec_int (name, nick, nick, lower, upper, def, perms);
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else
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ret = g_param_spec_float (name, nick, nick, lower, upper, def, perms);
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