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lv2: implemnt the map-extension

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This is the most used one and at the same time easy to implement sing QGQuark.
This commit is contained in:
Stefan Sauer 2016-05-14 12:35:15 -07:00
parent 3101fe78f9
commit da0a3d95e7
2 changed files with 34 additions and 3 deletions
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5
ext/lv2/README
View file

@ -12,7 +12,8 @@ http://lv2plug.in/ns/lv2core
http://lv2plug.in/ns/ext/port-groups
and these host features:
http://lv2plug.in/ns/ext/log/
http://lv2plug.in/ns/ext/log
http://lv2plug.in/ns/ext/urid
Example Pipeline:
@ -38,6 +39,8 @@ TODO
- we should sync, then fill the buffer and connect the port
* support presets
* support more host features
GST_DEBUG="lv2:4" GST_DEBUG_FILE=/tmp/gst.log gst-inspect lv2
grep -o "needs host feature: .*$" /tmp/gst.log | sort | uniq -c | sort -n
* samples sources:
http://svn.drobilla.net/lad/trunk/lilv/utils/lv2info.c

32
ext/lv2/gstlv2utils.c
View file

@ -28,6 +28,7 @@
#include "gstlv2utils.h"
#include <lv2/lv2plug.in/ns/ext/log/log.h>
#include <lv2/lv2plug.in/ns/ext/urid/urid.h>
GST_DEBUG_CATEGORY_EXTERN (lv2_debug);
#define GST_CAT_DEFAULT lv2_debug
@ -56,16 +57,43 @@ lv2_log_vprintf (LV2_Log_Handle handle, LV2_URID type,
}
static LV2_Log_Log lv2_log = {
NULL, /* handle */
lv2_log_printf, lv2_log_vprintf,
/* handle = */ NULL, lv2_log_printf, lv2_log_vprintf
};
static const LV2_Feature lv2_log_feature = { LV2_LOG__log, &lv2_log };
/* - urid map/unmap extension */
static LV2_URID
lv2_urid_map (LV2_URID_Map_Handle handle, const char *uri)
{
return (LV2_URID) g_quark_from_string (uri);
}
static const char *
lv2_urid_unmap (LV2_URID_Unmap_Handle handle, LV2_URID urid)
{
return g_quark_to_string ((GQuark) urid);
}
static LV2_URID_Map lv2_map = {
/* handle = */ NULL, lv2_urid_map
};
static LV2_URID_Unmap lv2_unmap = {
/* handle = */ NULL, lv2_urid_unmap
};
static const LV2_Feature lv2_map_feature = { LV2_URID__map, &lv2_map };
static const LV2_Feature lv2_unmap_feature = { LV2_URID__unmap, &lv2_unmap };
/* feature list */
static const LV2_Feature *lv2_features[] = {
&lv2_log_feature,
&lv2_map_feature,
&lv2_unmap_feature,
NULL
};