const

highly essential 0day fix in readme as well

Makefile

@@ -2,7 +2,7 @@ DISTNAME = crap
 VERSION = git
 
 EXE = design
-SHOBJ = crap_eq.so
+SHOBJ = crap_eq.so crap_eq_const.so
 MID = crap_util.o
 HEADERS = crap_util.h ladspa.h
 

README.md

@@ -2,7 +2,7 @@
 
 connor's rancid audio plugins. LADSPA.
 
-alternatively, crazy-revealing androgynous panties.
+alternatively, chocolate recipes are powerful.
 
 ### crap_eq
 
@@ -10,4 +10,4 @@ multiband parametric EQ. try redefining BANDS.
 
 ### crap_eq_const
 
-workinonit...
+simplified code for a response defined at compile-time.

crap_eq_const.c

@@ -0,0 +1,140 @@
+#include <stdlib.h>
+#include <math.h>
+
+#include "ladspa.h"
+#include "crap_util.h"
+
+typedef unsigned long ulong;
+
+#define REALBANDS 4
+#define EQ_INPUT  0
+#define EQ_OUTPUT 1
+#define PCOUNT    2
+
+const LADSPA_PortDescriptor p_discs[PCOUNT] = {
+    LADSPA_PORT_INPUT | LADSPA_PORT_AUDIO,
+    LADSPA_PORT_OUTPUT | LADSPA_PORT_AUDIO
+};
+const LADSPA_PortRangeHint p_hints[PCOUNT] = {
+    {.HintDescriptor = 0},
+    {.HintDescriptor = 0}
+};
+const char *p_names[PCOUNT] = {"Input", "Output"};
+
+typedef struct {
+	LADSPA_Data *input;
+	LADSPA_Data *output;
+
+	biquad filters[REALBANDS];
+	LADSPA_Data fs;
+
+	LADSPA_Data run_adding_gain;
+} eq_t;
+
+static void
+activate_eq(LADSPA_Handle instance) {
+	eq_t *eq = (eq_t *)instance;
+	biquad *filters = eq->filters;
+
+	for (int i = 0; i < REALBANDS; i++)
+		biquad_init(&filters[i]);
+}
+
+static void
+cleanup_eq(LADSPA_Handle instance) {
+	free(instance);
+}
+
+static void
+connect_port_eq(LADSPA_Handle instance, ulong port, LADSPA_Data *data) {
+	eq_t *eq = (eq_t *)instance;
+	if (port == EQ_INPUT)
+		eq->input = data;
+	else if (port == EQ_OUTPUT)
+		eq->output = data;
+}
+
+static LADSPA_Handle
+instantiate_eq(const LADSPA_Descriptor *descriptor, ulong s_rate) {
+	eq_t *eq = (eq_t *) calloc(1, sizeof(eq_t));
+	biquad *filters = eq->filters;
+	LADSPA_Data fs = s_rate;
+
+	eq->fs = fs;
+	eq->run_adding_gain = 1;
+
+	filters[0] = biquad_gen(4,   10,  0.0, 1.00, fs);
+	filters[1] = biquad_gen(0,   36,  4.3, 1.25, fs);
+	filters[2] = biquad_gen(2, 1400, -7.0, 1.20, fs);
+	filters[3] = biquad_gen(0, 7000,  3.3, 1.25, fs);
+
+	return (LADSPA_Handle) eq;
+}
+
+static void
+run_eq_for_real(LADSPA_Handle instance, ulong sample_count, const int running) {
+	eq_t *eq = (eq_t *) instance;
+
+	biquad *filters = eq->filters;
+
+	const LADSPA_Data *input = eq->input;
+	LADSPA_Data *output = eq->output;
+
+	for (ulong pos = 0; pos < sample_count; pos++) {
+		LADSPA_Data samp = input[pos];
+		for (int i = 0; i < REALBANDS; i++)
+			samp = biquad_run(&filters[i], samp);
+		if (running)
+			output[pos] += eq->run_adding_gain * samp;
+		else
+			output[pos] = samp;
+	}
+}
+
+static void
+run_eq(LADSPA_Handle instance, ulong sample_count) {
+	run_eq_for_real(instance, sample_count, 0);
+}
+
+static void
+run_adding_eq(LADSPA_Handle instance, ulong sample_count) {
+	run_eq_for_real(instance, sample_count, 1);
+}
+
+void
+set_run_adding_gain(LADSPA_Handle instance, LADSPA_Data gain) {
+	eq_t *eq = (eq_t *) instance;
+	eq->run_adding_gain = gain;
+}
+
+void _init() {} 
+void _fini() {}
+
+static const LADSPA_Descriptor eqDescriptor = {
+	.UniqueID = 0xDEFACED,
+	.Label = "crap_eq_const",
+	.Properties = 0,
+	.Name = "crap const Equalizer",
+	.Maker = "Connor Olding",
+	.Copyright = "MIT",
+	.PortCount = PCOUNT,
+	.PortDescriptors = p_discs,
+	.PortRangeHints = p_hints,
+	.PortNames = p_names,
+
+	.activate = activate_eq,
+	.cleanup = cleanup_eq,
+	.connect_port = connect_port_eq,
+	.deactivate = NULL,
+	.instantiate = instantiate_eq,
+	.run = run_eq,
+	.run_adding = run_adding_eq,
+	.set_run_adding_gain = set_run_adding_gain
+};
+
+const LADSPA_Descriptor *
+ladspa_descriptor(ulong index) {
+	if (index != 0)
+		return NULL;
+	return &eqDescriptor;
+}