aboutsummaryrefslogtreecommitdiffstats
path: root/src/lp4pole.c
diff options
context:
space:
mode:
Diffstat (limited to 'src/lp4pole.c')
-rw-r--r--src/lp4pole.c97
1 files changed, 55 insertions, 42 deletions
diff --git a/src/lp4pole.c b/src/lp4pole.c
index a00ca5b..1997ae3 100644
--- a/src/lp4pole.c
+++ b/src/lp4pole.c
@@ -18,9 +18,11 @@
*/
#include <stdlib.h>
+#include "lv2/lv2plug.in/ns/ext/morph/morph.h"
#include "lv2/lv2plug.in/ns/lv2core/lv2.h"
#include "lp4pole_filter.h"
#include "common.h"
+#include "uris.h"
#define LP4POLE_CUTOFF 0
#define LP4POLE_RESONANCE 1
@@ -33,6 +35,9 @@ typedef struct {
float* input;
float* output;
LP4PoleFilter* lpf;
+ uint32_t cutoff_is_cv;
+ uint32_t resonance_is_cv;
+ URIs uris;
} Lp4pole;
static void
@@ -68,6 +73,33 @@ connect_port(LV2_Handle instance,
}
}
+static LV2_Morph_Status
+morph_port(LV2_Handle instance,
+ uint32_t port,
+ LV2_URID type,
+ const LV2_Morph_Property*const* properties)
+{
+ Lp4pole* plugin = (Lp4pole*)instance;
+
+ if (type != plugin->uris.lv2_ControlPort &&
+ type != plugin->uris.lv2_CVPort) {
+ return LV2_MORPH_ERR_BAD_TYPE;
+ }
+
+ switch (port) {
+ case LP4POLE_CUTOFF:
+ plugin->cutoff_is_cv = (type == plugin->uris.lv2_CVPort);
+ break;
+ case LP4POLE_RESONANCE:
+ plugin->resonance_is_cv = (type == plugin->uris.lv2_CVPort);
+ break;
+ default:
+ return LV2_MORPH_ERR_BAD_PORT;
+ }
+
+ return LV2_MORPH_SUCCESS;
+}
+
static LV2_Handle
instantiate(const LV2_Descriptor* descriptor,
double sample_rate,
@@ -80,9 +112,12 @@ instantiate(const LV2_Descriptor* descriptor,
plugin->lpf = lp4pole_new(sample_rate);
if (!plugin->lpf) {
free(plugin);
- plugin = 0;
+ return NULL;
}
+ plugin->cutoff_is_cv = 0;
+ plugin->resonance_is_cv = 0;
}
+
return (LV2_Handle)plugin;
}
@@ -95,15 +130,15 @@ activate(LV2_Handle instance)
}
static void
-runLp4pole_faraia_oa(LV2_Handle instance,
- uint32_t sample_count)
+run(LV2_Handle instance,
+ uint32_t sample_count)
{
Lp4pole* plugin = (Lp4pole*)instance;
- /* Cutoff Frequency (array of floats of length sample_count) */
+ /* Cutoff Frequency (array of floats of length 1 or sample_count) */
const float* cutoff = plugin->cutoff;
- /* Resonance (array of floats of length sample_count) */
+ /* Resonance (array of floats of length 1 or sample_count) */
const float* resonance = plugin->resonance;
/* Input (array of floats of length sample_count) */
@@ -115,61 +150,39 @@ runLp4pole_faraia_oa(LV2_Handle instance,
/* Instance data */
LP4PoleFilter* lpf = plugin->lpf;
- float in;
- float co;
- float res;
-
for (uint32_t s = 0; s < sample_count; ++s) {
- co = cutoff[s];
- res = resonance[s];
- in = input[s];
+ const float co = cutoff[s * plugin->cutoff_is_cv];
+ const float res = resonance[s * plugin->resonance_is_cv];
+ const float in = input[s];
+ /* TODO: There is no branching in this function.
+ Would it actually be faster to check if co or res has changed?
+ */
lp4pole_set_params(lpf, co, res);
output[s] = lp4pole_run(lpf, in);
}
}
-static void
-runLp4pole_fcrcia_oa(LV2_Handle instance,
- uint32_t sample_count)
+static const void*
+extension_data(const char* uri)
{
- Lp4pole* plugin = (Lp4pole*)instance;
-
- /* Cutoff Frequency (float value) */
- const float cutoff = *(plugin->cutoff);
-
- /* Resonance (float value) */
- const float resonance = *(plugin->resonance);
-
- /* Input (array of floats of length sample_count) */
- const float* input = plugin->input;
-
- /* Output (pointer to float value) */
- float* output = plugin->output;
-
- /* Instance data */
- LP4PoleFilter* lpf = plugin->lpf;
-
- float in;
-
- lp4pole_set_params(lpf, cutoff, resonance);
-
- for (uint32_t s = 0; s < sample_count; ++s) {
- in = input[s];
- output[s] = lp4pole_run(lpf, in);
+ static const LV2_Morph_Interface morph = { morph_port, NULL };
+ if (!strcmp(uri, LV2_MORPH__interface)) {
+ return &morph;
}
+ return NULL;
}
static const LV2_Descriptor descriptor = {
- "http://drobilla.net/plugins/blip/lp4pole",
+ "http://drobilla.net/plugins/blop/lp4pole",
instantiate,
connect_port,
activate,
- runLp4pole_fcrcia_oa,
+ run,
NULL,
cleanup,
- NULL,
+ extension_data,
};
LV2_SYMBOL_EXPORT const LV2_Descriptor*