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