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-rw-r--r--src/pulse.c208
1 files changed, 67 insertions, 141 deletions
diff --git a/src/pulse.c b/src/pulse.c
index 8890fbd..c4d857b 100644
--- a/src/pulse.c
+++ b/src/pulse.c
@@ -18,7 +18,9 @@
*/
#include <stdlib.h>
+#include "lv2/lv2plug.in/ns/ext/morph/morph.h"
#include "lv2/lv2plug.in/ns/lv2core/lv2.h"
+#include "uris.h"
#include "wavedata.h"
#define PULSE_FREQUENCY 0
@@ -30,7 +32,10 @@ typedef struct {
float* pulsewidth;
float* output;
float phase;
+ uint32_t frequency_is_cv;
+ uint32_t pulsewidth_is_cv;
Wavedata wdat;
+ URIs uris;
} Pulse;
static void
@@ -53,6 +58,33 @@ 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)
+{
+ Pulse* plugin = (Pulse*)instance;
+
+ if (type != plugin->uris.lv2_ControlPort &&
+ type != plugin->uris.lv2_CVPort) {
+ return LV2_MORPH_ERR_BAD_TYPE;
+ }
+
+ switch (port) {
+ case PULSE_FREQUENCY:
+ plugin->frequency_is_cv = (type == plugin->uris.lv2_CVPort);
+ break;
+ case PULSE_PULSEWIDTH:
+ plugin->pulsewidth_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,
@@ -60,6 +92,9 @@ instantiate(const LV2_Descriptor* descriptor,
const LV2_Feature* const* features)
{
Pulse* plugin = (Pulse*)malloc(sizeof(Pulse));
+ if (!plugin) {
+ return NULL;
+ }
if (wavedata_load(&plugin->wdat, bundle_path, "sawtooth_data",
BLOP_DLSYM_SAWTOOTH, sample_rate)) {
@@ -67,6 +102,11 @@ instantiate(const LV2_Descriptor* descriptor,
return 0;
}
+ plugin->frequency_is_cv = 0;
+ plugin->pulsewidth_is_cv = 0;
+ map_uris(&plugin->uris, features);
+ wavedata_get_table(&plugin->wdat, 440.0);
+
return (LV2_Handle)plugin;
}
@@ -88,8 +128,8 @@ activate(LV2_Handle instance)
}
static void
-runPulse_fapa_oa(LV2_Handle instance,
- uint32_t sample_count)
+run(LV2_Handle instance,
+ uint32_t sample_count)
{
Pulse* plugin = (Pulse*)instance;
@@ -106,114 +146,32 @@ runPulse_fapa_oa(LV2_Handle instance,
Wavedata* wdat = &plugin->wdat;
float phase = plugin->phase;
- float freq;
- float pwidth;
- float phase_shift;
+ float last_pwidth = pulsewidth[0];
+ float pwidth = f_clip(last_pwidth, 0.0f, 1.0f);
+ float dc_shift = 1.0 - (2.0 * pwidth);
+ float phase_shift = pwidth * wdat->sample_rate;
for (uint32_t s = 0; s < sample_count; ++s) {
- freq = frequency[s];
- pwidth = f_clip(pulsewidth[s], 0.0f, 1.0f);
- phase_shift = pwidth * wdat->sample_rate;
-
- /* Lookup which table to use from frequency */
- wavedata_get_table(wdat, freq);
-
- /* Get samples from sawtooth and phase shifted inverted sawtooth,
- with approriate DC offset */
- output[s] = wavedata_get_sample(wdat, phase)
- - wavedata_get_sample(wdat, phase + phase_shift)
- + 1.0f - (2.0f * pwidth);
-
- /* Update phase, wrapping if necessary */
- phase += wdat->frequency;
- if (phase < 0.0f) {
- phase += wdat->sample_rate;
- } else if (phase > wdat->sample_rate) {
- phase -= wdat->sample_rate;
+ const float freq = frequency[s * plugin->frequency_is_cv];
+ if (freq != wdat->frequency) {
+ /* Frequency changed, look up table to play */
+ wavedata_get_table(wdat, freq);
}
- }
- plugin->phase = phase;
-}
-
-static void
-runPulse_fapc_oa(LV2_Handle instance,
- uint32_t sample_count)
-{
- Pulse* plugin = (Pulse*)instance;
-
- /* Frequency (array of float of length sample_count) */
- const float* frequency = plugin->frequency;
-
- /* Pulse Width (float value) */
- const float pulsewidth = f_clip(*(plugin->pulsewidth), 0.0f, 1.0f);
-
- /* Output (pointer to float value) */
- float* output = plugin->output;
- /* Instance data */
- Wavedata* wdat = &plugin->wdat;
- float phase = plugin->phase;
-
- float freq;
- float dc_shift = 1.0 - (2.0 * pulsewidth);
- float phase_shift = pulsewidth * wdat->sample_rate;
-
- for (uint32_t s = 0; s < sample_count; ++s) {
- freq = frequency[s];
-
- /* Lookup which table to use from frequency */
- wavedata_get_table(wdat, freq);
-
- /* Get samples from sawtooth and phase shifted inverted sawtooth,
- with approriate DC offset */
- output[s] = wavedata_get_sample(wdat, phase)
- - wavedata_get_sample(wdat, phase + phase_shift)
- + dc_shift;
-
- /* Update phase, wrapping if necessary */
- phase += wdat->frequency;
- if (phase < 0.0f) {
- phase += wdat->sample_rate;
- } else if (phase > wdat->sample_rate) {
- phase -= wdat->sample_rate;
+ const float this_pwidth = pulsewidth[s * plugin->pulsewidth_is_cv];
+ if (this_pwidth != last_pwidth) {
+ /* Pulsewidth changed, recalculate */
+ last_pwidth = this_pwidth;
+ pwidth = f_clip(this_pwidth, 0.0f, 1.0f);
+ dc_shift = 1.0f - (2.0f * pwidth);
+ phase_shift = pwidth * wdat->sample_rate;
}
- }
- plugin->phase = phase;
-}
-
-static void
-runPulse_fcpa_oa(LV2_Handle instance,
- uint32_t sample_count)
-{
- Pulse* plugin = (Pulse*)instance;
-
- /* Frequency (float value) */
- const float frequency = *(plugin->frequency);
-
- /* Pulse Width (array of float of length sample_count) */
- const float* pulsewidth = plugin->pulsewidth;
-
- /* Output (pointer to float value) */
- float* output = plugin->output;
-
- /* Instance data */
- Wavedata* wdat = &plugin->wdat;
- float phase = plugin->phase;
-
- float pwidth;
- float phase_shift;
-
- wavedata_get_table(wdat, frequency);
-
- for (uint32_t s = 0; s < sample_count; ++s) {
- pwidth = f_clip(pulsewidth[s], 0.0f, 1.0f);
- phase_shift = pwidth * wdat->sample_rate;
/* Get samples from sawtooth and phase shifted inverted sawtooth,
with approriate DC offset */
output[s] = wavedata_get_sample(wdat, phase)
- wavedata_get_sample(wdat, phase + phase_shift)
- + 1.0f - (2.0f * pwidth);
+ + dc_shift;
/* Update phase, wrapping if necessary */
phase += wdat->frequency;
@@ -226,57 +184,25 @@ runPulse_fcpa_oa(LV2_Handle instance,
plugin->phase = phase;
}
-static void
-runPulse_fcpc_oa(LV2_Handle instance,
- uint32_t sample_count)
+static const void*
+extension_data(const char* uri)
{
- Pulse* plugin = (Pulse*)instance;
-
- /* Frequency (float value) */
- const float frequency = *(plugin->frequency);
-
- /* Pulse Width (float value) */
- const float pulsewidth = f_clip(*(plugin->pulsewidth), 0.0f, 1.0f);
-
- /* Output (pointer to float value) */
- float* output = plugin->output;
-
- /* Instance data */
- Wavedata* wdat = &plugin->wdat;
- float phase = plugin->phase;
-
- float dc_shift = 1.0f - (2.0f * pulsewidth);
- float phase_shift = pulsewidth * wdat->sample_rate;
-
- wavedata_get_table(wdat, frequency);
-
- for (uint32_t s = 0; s < sample_count; ++s) {
- /* Get samples from sawtooth and phase shifted inverted sawtooth,
- with approriate DC offset */
- output[s] = wavedata_get_sample(wdat, phase)
- - wavedata_get_sample(wdat, phase + phase_shift)
- + dc_shift;
-
- /* Update phase, wrapping if necessary */
- phase += wdat->frequency;
- if (phase < 0.0f) {
- phase += wdat->sample_rate;
- } else if (phase > wdat->sample_rate) {
- phase -= wdat->sample_rate;
- }
+ static const LV2_Morph_Interface morph = { morph_port, NULL };
+ if (!strcmp(uri, LV2_MORPH__interface)) {
+ return &morph;
}
- plugin->phase = phase;
+ return NULL;
}
static const LV2_Descriptor descriptor = {
- "http://drobilla.net/plugins/blip/pulse",
+ "http://drobilla.net/plugins/blop/pulse",
instantiate,
connect_port,
activate,
- runPulse_fcpc_oa,
+ run,
NULL,
cleanup,
- NULL,
+ extension_data,
};
LV2_SYMBOL_EXPORT const LV2_Descriptor*
generated by cgit v1.2.1 (git 2.18.0) at 2024-04-25 00:51:24 +0000