ardour/livetrax
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NO-OP, explanatory comments

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This commit is contained in:
Robin Gareus 2016-11-10 01:45:00 +01:00
parent ce77df24ca
commit d253d49739
1 changed files with 9 additions and 2 deletions
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11
libs/ardour/lv2_plugin.cc
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@ -2194,27 +2194,34 @@ LV2Plugin::describe_io_port (ARDOUR::DataType dt, bool input, uint32_t id) const
Plugin::IOPortDescription iod (lilv_node_as_string (name)); Plugin::IOPortDescription iod (lilv_node_as_string (name));
lilv_node_free(name); lilv_node_free(name);
/* get the port's pg:group */
LilvNodes* groups = lilv_port_get_value (_impl->plugin, pport, _world.groups_group); LilvNodes* groups = lilv_port_get_value (_impl->plugin, pport, _world.groups_group);
if (lilv_nodes_size (groups) > 0) { if (lilv_nodes_size (groups) > 0) {
const LilvNode* group = lilv_nodes_get_first (groups); const LilvNode* group = lilv_nodes_get_first (groups);
LilvNodes* grouplabel = lilv_world_find_nodes (_world.world, group, _world.rdfs_label, NULL); LilvNodes* grouplabel = lilv_world_find_nodes (_world.world, group, _world.rdfs_label, NULL);
/* get the name of the port-group */
if (lilv_nodes_size (grouplabel) > 0) { if (lilv_nodes_size (grouplabel) > 0) {
const LilvNode* grpname = lilv_nodes_get_first (grouplabel); const LilvNode* grpname = lilv_nodes_get_first (grouplabel);
iod.group_name = lilv_node_as_string (grpname); iod.group_name = lilv_node_as_string (grpname);
} }
lilv_nodes_free (grouplabel); lilv_nodes_free (grouplabel);
/* get all port designations.
* we're interested in e.g. lv2:designation pg:right */
LilvNodes* designations = lilv_port_get_value (_impl->plugin, pport, _world.lv2_designation); LilvNodes* designations = lilv_port_get_value (_impl->plugin, pport, _world.lv2_designation);
if (group && lilv_nodes_size (designations) > 0) { if (lilv_nodes_size (designations) > 0) {
/* get all pg:elements of the pg:group */
LilvNodes* group_childs = lilv_world_find_nodes (_world.world, group, _world.groups_element, NULL); LilvNodes* group_childs = lilv_world_find_nodes (_world.world, group, _world.groups_element, NULL);
if (lilv_nodes_size (group_childs) > 0) { if (lilv_nodes_size (group_childs) > 0) {
/* iterate over all port designations .. */
LILV_FOREACH (nodes, i, designations) { LILV_FOREACH (nodes, i, designations) {
const LilvNode* designation = lilv_nodes_get (designations, i); const LilvNode* designation = lilv_nodes_get (designations, i);
/* match the lv2:designation's element against the port-group's element */
LILV_FOREACH (nodes, j, group_childs) { LILV_FOREACH (nodes, j, group_childs) {
const LilvNode* group_element = lilv_nodes_get (group_childs, j); const LilvNode* group_element = lilv_nodes_get (group_childs, j);
LilvNodes* elem = lilv_world_find_nodes (_world.world, group_element, _world.lv2_designation, designation); LilvNodes* elem = lilv_world_find_nodes (_world.world, group_element, _world.lv2_designation, designation);
/* found it. Now look up the index (channel-number) of the pg:Element */
if (lilv_nodes_size (elem) > 0) { if (lilv_nodes_size (elem) > 0) {
LilvNodes* idx = lilv_world_find_nodes (_world.world, lilv_nodes_get_first (elem), _world.lv2_index, NULL); LilvNodes* idx = lilv_world_find_nodes (_world.world, lilv_nodes_get_first (elem), _world.lv2_index, NULL);
if (lilv_node_is_int (lilv_nodes_get_first (idx))) { if (lilv_node_is_int (lilv_nodes_get_first (idx))) {