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amy.c
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amy.c
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// libAMY
// Brian Whitman
#include "amy.h"
// Flag set momentarily by debug message to report state on-demand.
int debug_flag = 0;
#ifdef AMY_DEBUG
const char* profile_tag_name(enum itags tag) {
switch (tag) {
case RENDER_OSC_WAVE: return "RENDER_OSC_WAVE";
case COMPUTE_BREAKPOINT_SCALE: return "COMPUTE_BREAKPOINT_SCALE";
case HOLD_AND_MODIFY: return "HOLD_AND_MODIFY";
case FILTER_PROCESS: return "FILTER_PROCESS";
case FILTER_PROCESS_STAGE0: return "FILTER_PROCESS_STAGE0";
case FILTER_PROCESS_STAGE1: return "FILTER_PROCESS_STAGE1";
case ADD_DELTA_TO_QUEUE: return "ADD_DELTA_TO_QUEUE";
case AMY_ADD_EVENT: return "AMY_ADD_EVENT";
case PLAY_EVENT: return "PLAY_EVENT";
case MIX_WITH_PAN: return "MIX_WITH_PAN";
case AMY_RENDER: return "AMY_RENDER";
case AMY_PREPARE_BUFFER: return "AMY_PREPARE_BUFFER";
case AMY_FILL_BUFFER: return "AMY_FILL_BUFFER";
case AMY_PARSE_MESSAGE: return "AMY_PARSE_MESSAGE";
case RENDER_LUT_FM: return "RENDER_LUT_FM";
case RENDER_LUT_FB: return "RENDER_LUT_FB";
case RENDER_LUT: return "RENDER_LUT";
case RENDER_LUT_CUB: return "RENDER_LUT_CUB";
case RENDER_LUT_FM_FB: return "RENDER_LUT_FM_FB";
case RENDER_LPF_LUT: return "RENDER_LPF_LUT";
case DSPS_BIQUAD_F32_ANSI_SPLIT_FB: return "DSPS_BIQUAD_F32_ANSI_SPLIT_FB";
case DSPS_BIQUAD_F32_ANSI_SPLIT_FB_TWICE: return "DSPS_BIQUAD_F32_ANSI_SPLIT_FB_TWICE";
case DSPS_BIQUAD_F32_ANSI_COMMUTED: return "DSPS_BIQUAD_F32_ANSI_COMMUTED";
case PARAMETRIC_EQ_PROCESS: return "PARAMETRIC_EQ_PROCESS";
case HPF_BUF: return "HPF_BUF";
case SCAN_MAX: return "SCAN_MAX";
case DSPS_BIQUAD_F32_ANSI: return "DSPS_BIQUAD_F32_ANSI";
case BLOCK_NORM: return "BLOCK_NORM";
case CALIBRATE: return "CALIBRATE";
case AMY_ESP_FILL_BUFFER: return "AMY_ESP_FILL_BUFFER";
case NO_TAG: return "NO_TAG";
}
return "ERROR";
}
struct profile profiles[NO_TAG];
uint64_t profile_start_us = 0;
#ifdef ESP_PLATFORM
#include "esp_timer.h"
int64_t amy_get_us() { return esp_timer_get_time(); }
#elif defined PICO_ON_DEVICE
int64_t amy_get_us() { return to_us_since_boot(get_absolute_time()); }
#else
#include <sys/time.h>
int64_t amy_get_us() { struct timeval tv; gettimeofday(&tv,NULL); return tv.tv_sec*(uint64_t)1000000+tv.tv_usec; }
#endif
void amy_profiles_init() {
for(uint8_t i=0;i<NO_TAG;i++) { AMY_PROFILE_INIT(i) }
}
void amy_profiles_print() { for(uint8_t i=0;i<NO_TAG;i++) { AMY_PROFILE_PRINT(i) } amy_profiles_init(); }
#else
#define amy_profiles_init()
#define amy_profiles_print()
#endif
// This defaults PCM size to small. If you want to be different, include "pcm_large.h" or "pcm_tiny.h"
#include "pcm_small.h"
#include "clipping_lookup_table.h"
#include "delay.h"
// Final output delay lines.
delay_line_t **delay_lines;
#ifdef _POSIX_THREADS
#include <pthread.h>
pthread_mutex_t amy_queue_lock;
#endif
#ifdef ESP_PLATFORM
#include "freertos/FreeRTOS.h"
#include "freertos/task.h"
#include "freertos/semphr.h"
extern SemaphoreHandle_t xQueueSemaphore;
#endif
// Global state
struct state amy_global;
// set of deltas for the fifo to be played
struct delta * events;
// state per osc as multi-channel synthesizer that the scheduler renders into
struct synthinfo * synth;
// envelope-modified per-osc state
struct mod_synthinfo * msynth;
// Two mixing blocks, one per core of rendering
SAMPLE ** fbl;
SAMPLE ** per_osc_fb;
#ifndef malloc_caps
void * malloc_caps(uint32_t size, uint32_t flags) {
#ifdef ESP_PLATFORM
//fprintf(stderr, "allocing size %ld flags %ld\n", size, flags);
return heap_caps_malloc(size, flags);
#else
// ignore flags
return malloc(size);
#endif
}
#endif
// block -- what gets sent to the dac -- -32768...32767 (int16 le)
output_sample_type * block;
uint32_t total_samples;
uint32_t event_counter ;
uint32_t message_counter ;
char *message_start_pointer;
int16_t message_length;
int32_t computed_delta; // can be negative no prob, but usually host is larger # than client
uint8_t computed_delta_set; // have we set a delta yet?
SAMPLE *delay_mod = NULL;
typedef struct chorus_config {
SAMPLE level; // How much of the delayed signal to mix in to the output, typ F2S(0.5).
int max_delay; // Max delay when modulating. Must be <= DELAY_LINE_LEN
float lfo_freq;
float depth;
} chorus_config_t;
chorus_config_t chorus = {CHORUS_DEFAULT_LEVEL, CHORUS_DEFAULT_MAX_DELAY, CHORUS_DEFAULT_LFO_FREQ, CHORUS_DEFAULT_MOD_DEPTH};
void alloc_chorus_delay_lines(void) {
for(uint16_t c=0;c<AMY_NCHANS;++c) {
delay_lines[c] = new_delay_line(DELAY_LINE_LEN, DELAY_LINE_LEN / 2, CHORUS_RAM_CAPS);
}
delay_mod = (SAMPLE *)malloc_caps(sizeof(SAMPLE) * AMY_BLOCK_SIZE, CHORUS_RAM_CAPS);
}
void dealloc_chorus_delay_lines(void) {
for(uint16_t c=0;c<AMY_NCHANS;++c) {
if (delay_lines[c]) free(delay_lines[c]);
delay_lines[c] = NULL;
}
free(delay_mod);
delay_mod = NULL;
}
void config_chorus(float level, int max_delay, float lfo_freq, float depth) {
//fprintf(stderr, "config_chorus: level %.3f max_del %d lfo_freq %.3f depth %.3f\n",
// level, max_delay, lfo_freq, depth);
if (level > 0) {
// only allocate delay lines if chorus is more than inaudible.
if (delay_lines[0] == NULL) {
alloc_chorus_delay_lines();
}
// if we're turning on for the first time, start the oscillator.
if (synth[CHORUS_MOD_SOURCE].status == STATUS_OFF) { //chorus.level == 0) {
// Setup chorus oscillator.
synth[CHORUS_MOD_SOURCE].logfreq_coefs[COEF_CONST] = logfreq_of_freq(lfo_freq);
synth[CHORUS_MOD_SOURCE].logfreq_coefs[COEF_NOTE] = 0; // Turn off default.
synth[CHORUS_MOD_SOURCE].logfreq_coefs[COEF_BEND] = 0; // Turn off default.
synth[CHORUS_MOD_SOURCE].amp_coefs[COEF_CONST] = depth;
synth[CHORUS_MOD_SOURCE].amp_coefs[COEF_VEL] = 0; // Turn off default.
synth[CHORUS_MOD_SOURCE].amp_coefs[COEF_EG0] = 0; // Turn off default.
synth[CHORUS_MOD_SOURCE].wave = TRIANGLE;
osc_note_on(CHORUS_MOD_SOURCE, freq_of_logfreq(synth[CHORUS_MOD_SOURCE].logfreq_coefs[0]));
}
// apply max_delay.
for (int core=0; core<AMY_CORES; ++core) {
for (int chan=0; chan<AMY_NCHANS; ++chan) {
//delay_lines[chan]->max_delay = max_delay;
delay_lines[chan]->fixed_delay = (int)max_delay / 2;
}
}
}
chorus.max_delay = max_delay;
chorus.level = F2S(level);
chorus.lfo_freq = lfo_freq;
chorus.depth = depth;
}
typedef struct reverb_state {
SAMPLE level;
float liveness;
float damping;
float xover_hz;
} reverb_state_t;
reverb_state_t reverb = {F2S(REVERB_DEFAULT_LEVEL), REVERB_DEFAULT_LIVENESS, REVERB_DEFAULT_DAMPING, REVERB_DEFAULT_XOVER_HZ};
void config_reverb(float level, float liveness, float damping, float xover_hz) {
if (level > 0) {
//printf("config_reverb: level %f liveness %f xover %f damping %f\n",
// level, liveness, xover_hz, damping);
if (reverb.level == 0) init_stereo_reverb(); // In case it's the first time
config_stereo_reverb(liveness, xover_hz, damping);
}
reverb.level = F2S(level);
reverb.liveness = liveness;
reverb.damping = damping;
reverb.xover_hz = xover_hz;
}
int8_t check_init(amy_err_t (*fn)(), char *name) {
//fprintf(stderr,"starting %s: ", name);
const amy_err_t ret = (*fn)();
if(ret != AMY_OK) {
fprintf(stderr,"[error:%i]\n", ret);
return -1;
}
//fprintf(stderr,"[ok]\n");
return 0;
}
void default_amy_parse_callback(char mode, char * message) {
// do nothing
}
int8_t global_init() {
// function pointers
//amy_parse_callback = &default_amy_parse_callback;
amy_global.next_event_write = 0;
amy_global.event_start = NULL;
amy_global.event_qsize = 0;
amy_global.volume = 1.0f;
amy_global.pitch_bend = 0;
amy_global.latency_ms = 0;
amy_global.eq[0] = F2S(1.0f);
amy_global.eq[1] = F2S(1.0f);
amy_global.eq[2] = F2S(1.0f);
amy_global.hpf_state = 0;
amy_global.cores = 1;
amy_global.has_reverb = 1;
amy_global.has_chorus = 1;
return 0;
}
// Convert to and from the log-frequency scale.
// A log-frequency scale is good for summing control inputs.
float logfreq_of_freq(float freq) {
// logfreq is defined as log_2(freq / 8.18 Hz)
if (freq==0) return ZERO_HZ_LOG_VAL;
return log2f(freq / ZERO_LOGFREQ_IN_HZ);
}
float freq_of_logfreq(float logfreq) {
if (logfreq==ZERO_HZ_LOG_VAL) return 0;
return ZERO_LOGFREQ_IN_HZ * exp2f(logfreq);
}
float freq_for_midi_note(uint8_t midi_note) {
return 440.0f*powf(2, (midi_note - 69.0f) / 12.0f);
}
float logfreq_for_midi_note(uint8_t midi_note) {
// TODO: Precompensate for EPS_FOR_LOG
return (midi_note - ZERO_MIDI_NOTE) / 12.0f;
}
// create a new default API accessible event
struct event amy_default_event() {
struct event e;
e.status = EMPTY;
AMY_UNSET(e.time);
AMY_UNSET(e.osc);
AMY_UNSET(e.patch);
AMY_UNSET(e.wave);
AMY_UNSET(e.load_patch);
AMY_UNSET(e.phase);
AMY_UNSET(e.feedback);
AMY_UNSET(e.velocity);
AMY_UNSET(e.midi_note);
AMY_UNSET(e.volume);
AMY_UNSET(e.pitch_bend);
AMY_UNSET(e.latency_ms);
AMY_UNSET(e.ratio);
for (int i = 0; i < NUM_COMBO_COEFS; ++i) {
AMY_UNSET(e.amp_coefs[i]);
AMY_UNSET(e.freq_coefs[i]);
AMY_UNSET(e.filter_freq_coefs[i]);
AMY_UNSET(e.duty_coefs[i]);
AMY_UNSET(e.pan_coefs[i]);
}
AMY_UNSET(e.resonance);
AMY_UNSET(e.filter_type);
AMY_UNSET(e.chained_osc);
AMY_UNSET(e.clone_osc);
AMY_UNSET(e.mod_source);
AMY_UNSET(e.mod_target);
AMY_UNSET(e.eq_l);
AMY_UNSET(e.eq_m);
AMY_UNSET(e.eq_h);
AMY_UNSET(e.algorithm);
AMY_UNSET(e.bp_is_set[0]);
AMY_UNSET(e.bp_is_set[1]);
AMY_UNSET(e.bp0_target);
AMY_UNSET(e.bp1_target);
AMY_UNSET(e.reset_osc);
e.algo_source[0] = 0;
e.bp0[0] = 0;
e.bp1[0] = 0;
e.voices[0] = 0;
return e;
}
void add_delta_to_queue(struct delta d) {
AMY_PROFILE_START(ADD_DELTA_TO_QUEUE)
#if defined ESP_PLATFORM && !defined ARDUINO
// take the queue mutex before starting
xSemaphoreTake(xQueueSemaphore, portMAX_DELAY);
#elif defined _POSIX_THREADS
//fprintf(stderr,"add_delta: time %d osc %d param %d val 0x%x, qsize %d\n", total_samples, d.osc, d.param, d.data, amy_global.event_qsize);
pthread_mutex_lock(&amy_queue_lock);
#endif
if(amy_global.event_qsize < AMY_EVENT_FIFO_LEN) {
// scan through the memory to find a free slot, starting at write pointer
uint16_t write_location = amy_global.next_event_write;
int16_t found = -1;
// guaranteed to find eventually if qsize stays accurate
while(found<0) {
if(events[write_location].time == UINT32_MAX) found = write_location;
write_location = (write_location + 1) % AMY_EVENT_FIFO_LEN;
}
// found a mem location. copy the data in and update the write pointers.
events[found].time = d.time;
events[found].osc = d.osc;
events[found].param = d.param;
events[found].data = d.data;
amy_global.next_event_write = write_location;
amy_global.event_qsize++;
// now insert it into the sorted list for fast playback
struct delta **pptr = &amy_global.event_start;
while(d.time >= (*pptr)->time)
pptr = &(*pptr)->next;
events[found].next = *pptr;
*pptr = &events[found];
event_counter++;
} else {
// if there's no room in the queue, just skip the message
// todo -- report this somehow?
fprintf(stderr, "AMY queue is full\n");
}
#if defined ESP_PLATFORM && !defined ARDUINO
xSemaphoreGive( xQueueSemaphore );
#elif defined _POSIX_THREADS
pthread_mutex_unlock(&amy_queue_lock);
#endif
AMY_PROFILE_STOP(ADD_DELTA_TO_QUEUE)
}
// For people to call when they don't know base_osc or don't care
void amy_add_event(struct event e) {
amy_add_event_internal(e, 0);
}
// Add a API facing event, convert into delta directly
void amy_add_event_internal(struct event e, uint16_t base_osc) {
AMY_PROFILE_START(AMY_ADD_EVENT)
struct delta d;
// Synth defaults if not set, these are required for the delta struct
if(AMY_IS_UNSET(e.osc)) { e.osc = 0; }
if(AMY_IS_UNSET(e.time)) { e.time = 0; }
// First, adapt the osc in this event with base_osc offsets for voices
e.osc += base_osc;
// Voices / patches gets set up here
// you must set both voices & load_patch together to load a patch
if(e.voices[0] != 0 && AMY_IS_SET(e.load_patch)) {
patches_load_patch(e);
patches_event_has_voices(e);
goto end;
} else {
if(e.voices[0] != 0) {
patches_event_has_voices(e);
goto end;
}
}
d.time = e.time;
d.osc = e.osc;
// Everything else only added to queue if set
if(AMY_IS_SET(e.wave)) { d.param=WAVE; d.data = *(uint32_t *)&e.wave; add_delta_to_queue(d); }
if(AMY_IS_SET(e.patch)) { d.param=PATCH; d.data = *(uint32_t *)&e.patch; add_delta_to_queue(d); }
if(AMY_IS_SET(e.midi_note)) { d.param=MIDI_NOTE; d.data = *(uint32_t *)&e.midi_note; add_delta_to_queue(d); }
for (int i = 0; i < NUM_COMBO_COEFS; ++i)
if(AMY_IS_SET(e.amp_coefs[i])) { d.param=AMP + i; d.data = *(uint32_t *)&e.amp_coefs[i]; add_delta_to_queue(d); }
// First freq coef is in Hz, rest are linear.
if(AMY_IS_SET(e.freq_coefs[0])) { float logfreq = logfreq_of_freq(e.freq_coefs[0]); d.param=FREQ; d.data = *(uint32_t *)&logfreq; add_delta_to_queue(d); }
for (int i = 1; i < NUM_COMBO_COEFS; ++i)
if(AMY_IS_SET(e.freq_coefs[i])) { d.param=FREQ + i; d.data = *(uint32_t *)&e.freq_coefs[i]; add_delta_to_queue(d); }
// First freq coef is in Hz, rest are linear.
if(AMY_IS_SET(e.filter_freq_coefs[0])) { float filter_logfreq = logfreq_of_freq(e.filter_freq_coefs[0]); d.param=FILTER_FREQ; d.data = *(uint32_t *)&filter_logfreq; add_delta_to_queue(d); }
for (int i = 1; i < NUM_COMBO_COEFS; ++i)
if(AMY_IS_SET(e.filter_freq_coefs[i])) { float filter_logfreq_coef = e.filter_freq_coefs[i]; d.param=FILTER_FREQ + i; d.data = *(uint32_t *)&filter_logfreq_coef; add_delta_to_queue(d); }
for (int i = 0; i < NUM_COMBO_COEFS; ++i)
if(AMY_IS_SET(e.duty_coefs[i])) { d.param=DUTY + i; d.data = *(uint32_t *)&e.duty_coefs[i]; add_delta_to_queue(d); }
for (int i = 0; i < NUM_COMBO_COEFS; ++i)
if(AMY_IS_SET(e.pan_coefs[i])) { d.param=PAN + i; d.data = *(uint32_t *)&e.pan_coefs[i]; add_delta_to_queue(d); }
if(AMY_IS_SET(e.feedback)) { d.param=FEEDBACK; d.data = *(uint32_t *)&e.feedback; add_delta_to_queue(d); }
if(AMY_IS_SET(e.phase)) { d.param=PHASE; d.data = *(uint32_t *)&e.phase; add_delta_to_queue(d); }
if(AMY_IS_SET(e.volume)) { d.param=VOLUME; d.data = *(uint32_t *)&e.volume; add_delta_to_queue(d); }
if(AMY_IS_SET(e.pitch_bend)) { d.param=PITCH_BEND; d.data = *(uint32_t *)&e.pitch_bend; add_delta_to_queue(d); }
if(AMY_IS_SET(e.latency_ms)) { d.param=LATENCY; d.data = *(uint32_t *)&e.latency_ms; add_delta_to_queue(d); }
if(AMY_IS_SET(e.ratio)) { float logratio = log2f(e.ratio); d.param=RATIO; d.data = *(uint32_t *)&logratio; add_delta_to_queue(d); }
if(AMY_IS_SET(e.resonance)) { d.param=RESONANCE; d.data = *(uint32_t *)&e.resonance; add_delta_to_queue(d); }
if(AMY_IS_SET(e.chained_osc)) { e.chained_osc += base_osc; d.param=CHAINED_OSC; d.data = *(uint32_t *)&e.chained_osc; add_delta_to_queue(d); }
if(AMY_IS_SET(e.clone_osc)) { e.clone_osc += base_osc; d.param=CLONE_OSC; d.data = *(uint32_t *)&e.clone_osc; add_delta_to_queue(d); }
if(AMY_IS_SET(e.reset_osc)) { e.reset_osc += base_osc; d.param=RESET_OSC; d.data = *(uint32_t *)&e.reset_osc; add_delta_to_queue(d); }
if(AMY_IS_SET(e.mod_source)) { e.mod_source += base_osc; d.param=MOD_SOURCE; d.data = *(uint32_t *)&e.mod_source; add_delta_to_queue(d); }
if(AMY_IS_SET(e.mod_target)) { d.param=MOD_TARGET; d.data = *(uint32_t *)&e.mod_target; add_delta_to_queue(d); }
if(AMY_IS_SET(e.bp0_target)) { d.param=BP0_TARGET; d.data = *(uint32_t *)&e.bp0_target; add_delta_to_queue(d); }
if(AMY_IS_SET(e.bp1_target)) { d.param=BP1_TARGET; d.data = *(uint32_t *)&e.bp1_target; add_delta_to_queue(d); }
if(AMY_IS_SET(e.filter_type)) { d.param=FILTER_TYPE; d.data = *(uint32_t *)&e.filter_type; add_delta_to_queue(d); }
if(AMY_IS_SET(e.algorithm)) { d.param=ALGORITHM; d.data = *(uint32_t *)&e.algorithm; add_delta_to_queue(d); }
if(AMY_IS_SET(e.eq_l)) { d.param=EQ_L; d.data = *(uint32_t *)&e.eq_l; add_delta_to_queue(d); }
if(AMY_IS_SET(e.eq_m)) { d.param=EQ_M; d.data = *(uint32_t *)&e.eq_m; add_delta_to_queue(d); }
if(AMY_IS_SET(e.eq_h)) { d.param=EQ_H; d.data = *(uint32_t *)&e.eq_h; add_delta_to_queue(d); }
if(e.algo_source[0] != 0) {
struct synthinfo t;
parse_algorithm_source(&t, e.algo_source);
for(uint8_t i=0;i<MAX_ALGO_OPS;i++) {
d.param = ALGO_SOURCE_START + i;
d.data = t.algo_source[i] + base_osc;
add_delta_to_queue(d);
}
}
char * bps[MAX_BREAKPOINT_SETS] = {e.bp0, e.bp1};
for(uint8_t i=0;i<MAX_BREAKPOINT_SETS;i++) {
// amy_parse_message sets bp_is_set for anything including an empty string,
// but direct calls to amy_add_event can just put a nonempty string into bp0/1.
if(AMY_IS_SET(e.bp_is_set[i]) || bps[i][0] != 0) {
struct synthinfo t;
parse_breakpoint(&t, bps[i], i);
for(uint8_t j=0;j<MAX_BREAKPOINTS;j++) {
d.param=BP_START+(j*2)+(i*MAX_BREAKPOINTS*2); d.data = *(uint32_t *)&t.breakpoint_times[i][j]; add_delta_to_queue(d);
// Stop adding deltas after first UNSET time sent, just to mark the end of the set when overwriting.
if(!AMY_IS_SET(t.breakpoint_times[i][j])) break;
d.param=BP_START+(j*2 + 1)+(i*MAX_BREAKPOINTS*2); d.data = *(uint32_t *)&t.breakpoint_values[i][j]; add_delta_to_queue(d);
}
}
}
// add this last -- this is a trigger, that if sent alongside osc setup parameters, you want to run after those
if(AMY_IS_SET(e.velocity)) { d.param=VELOCITY; d.data = *(uint32_t *)&e.velocity; add_delta_to_queue(d); }
end:
message_counter++;
AMY_PROFILE_STOP(AMY_ADD_EVENT)
}
void clone_osc(uint16_t i, uint16_t f) {
// Set all the synth state to the values from another osc.
//fprintf(stderr, "cloning osc %d from %d\n", i, f);
synth[i].wave = synth[f].wave;
synth[i].patch = synth[f].patch;
//synth[i].midi_note = synth[f].midi_note;
for (int j = 0; j < NUM_COMBO_COEFS; ++j)
synth[i].amp_coefs[j] = synth[f].amp_coefs[j];
for (int j = 0; j < NUM_COMBO_COEFS; ++j)
synth[i].logfreq_coefs[j] = synth[f].logfreq_coefs[j];
for (int j = 0; j < NUM_COMBO_COEFS; ++j)
synth[i].filter_logfreq_coefs[j] = synth[f].filter_logfreq_coefs[j];
for (int j = 0; j < NUM_COMBO_COEFS; ++j)
synth[i].duty_coefs[j] = synth[f].duty_coefs[j];
for (int j = 0; j < NUM_COMBO_COEFS; ++j)
synth[i].pan_coefs[j] = synth[f].pan_coefs[j];
synth[i].feedback = synth[f].feedback;
//synth[i].phase = synth[f].phase;
//synth[i].volume = synth[f].volume;
synth[i].eq_l = synth[f].eq_l;
synth[i].eq_m = synth[f].eq_m;
synth[i].eq_h = synth[f].eq_h;
synth[i].logratio = synth[f].logratio;
synth[i].resonance = synth[f].resonance;
//synth[i].velocity = synth[f].velocity;
//synth[i].step = synth[f].step;
//synth[i].sample = synth[f].sample;
//synth[i].mod_value = synth[f].mod_value;
//synth[i].substep = synth[f].substep;
//synth[i].status = synth[f].status;
//synth[i].chained_osc = synth[f].chained_osc; // RISKY - could make osc loops without knowing.
//synth[i].mod_source = synth[f].mod_source; // It's OK to have multiple oscs with the same mod source. But if we set it, then clone other params, we overwrite it.
synth[i].mod_target = synth[f].mod_target;
//synth[i].note_on_clock = synth[f].note_on_clock;
//synth[i].note_off_clock = synth[f].note_off_clock;
//synth[i].zero_amp_clock = synth[f].zero_amp_clock;
//synth[i].mod_value_clock = synth[f].mod_value_clock;
synth[i].filter_type = synth[f].filter_type;
//synth[i].hpf_state[0] = synth[f].hpf_state[0];
//synth[i].hpf_state[1] = synth[f].hpf_state[1];
//synth[i].last_amp = synth[f].last_amp;
//synth[i].dc_offset = synth[f].dc_offset;
synth[i].algorithm = synth[f].algorithm;
//for(uint8_t j=0;j<MAX_ALGO_OPS;j++) synth[i].algo_source[j] = synth[f].algo_source[j]; // RISKY - end up allocating secondary oscs to multiple mains.
for(uint8_t j=0;j<MAX_BREAKPOINT_SETS;j++) {
for(uint8_t k=0;k<MAX_BREAKPOINTS;k++) {
synth[i].breakpoint_times[j][k] = synth[f].breakpoint_times[j][k];
synth[i].breakpoint_values[j][k] = synth[f].breakpoint_values[j][k];
}
synth[i].breakpoint_target[j] = synth[f].breakpoint_target[j];
}
//for(uint8_t j=0;j<MAX_BREAKPOINT_SETS;j++) { synth[i].last_scale[j] = synth[f].last_scale[j]; }
//synth[i].last_two[0] = synth[f].last_two[0];
//synth[i].last_two[1] = synth[f].last_two[1];
//synth[i].lut = synth[f].lut;
}
void reset_osc(uint16_t i ) {
// set all the synth state to defaults
synth[i].osc = i; // self-reference to make updating oscs easier
synth[i].wave = SINE;
msynth[i].last_duty = 0.5f;
AMY_UNSET(synth[i].patch);
AMY_UNSET(synth[i].midi_note);
for (int j = 0; j < NUM_COMBO_COEFS; ++j)
synth[i].amp_coefs[j] = 0;
synth[i].amp_coefs[COEF_VEL] = 1.0f;
synth[i].amp_coefs[COEF_EG0] = 1.0f;
msynth[i].amp = 1.0f;
for (int j = 0; j < NUM_COMBO_COEFS; ++j)
synth[i].logfreq_coefs[j] = 0;
synth[i].logfreq_coefs[COEF_NOTE] = 1.0;
synth[i].logfreq_coefs[COEF_BEND] = 1.0;
msynth[i].logfreq = 0;
for (int j = 0; j < NUM_COMBO_COEFS; ++j)
synth[i].filter_logfreq_coefs[j] = 0;
msynth[i].filter_logfreq = 0;
for (int j = 0; j < NUM_COMBO_COEFS; ++j)
synth[i].duty_coefs[j] = 0;
synth[i].duty_coefs[COEF_CONST] = 0.5f;
msynth[i].duty = 0.5f;
for (int j = 0; j < NUM_COMBO_COEFS; ++j)
synth[i].pan_coefs[j] = 0;
synth[i].pan_coefs[COEF_CONST] = 0.5f;
msynth[i].pan = 0.5f;
synth[i].feedback = F2S(0); //.996; todo ks feedback is v different from fm feedback
msynth[i].feedback = F2S(0); //.996; todo ks feedback is v different from fm feedback
synth[i].phase = F2P(0);
synth[i].volume = 0;
synth[i].eq_l = 0;
synth[i].eq_m = 0;
synth[i].eq_h = 0;
AMY_UNSET(synth[i].logratio);
synth[i].resonance = 0.7f;
msynth[i].resonance = 0.7f;
synth[i].velocity = 0;
synth[i].step = 0;
synth[i].sample = F2S(0);
synth[i].mod_value = F2S(0);
synth[i].substep = 0;
synth[i].status = STATUS_OFF;
AMY_UNSET(synth[i].chained_osc);
AMY_UNSET(synth[i].mod_source);
synth[i].mod_target = 0;
AMY_UNSET(synth[i].note_on_clock);
AMY_UNSET(synth[i].note_off_clock);
AMY_UNSET(synth[i].zero_amp_clock);
AMY_UNSET(synth[i].mod_value_clock);
synth[i].filter_type = FILTER_NONE;
synth[i].hpf_state[0] = 0;
synth[i].hpf_state[1] = 0;
for(int j = 0; j < 2 * FILT_NUM_DELAYS; ++j) synth[i].filter_delay[j] = 0;
synth[i].last_filt_norm_bits = 0;
synth[i].last_amp = 0;
synth[i].dc_offset = 0;
synth[i].algorithm = 0;
for(uint8_t j=0;j<MAX_ALGO_OPS;j++) AMY_UNSET(synth[i].algo_source[j]);
for(uint8_t j=0;j<MAX_BREAKPOINT_SETS;j++) {
for(uint8_t k=0;k<MAX_BREAKPOINTS;k++) {
AMY_UNSET(synth[i].breakpoint_times[j][k]);
AMY_UNSET(synth[i].breakpoint_values[j][k]);
}
synth[i].breakpoint_target[j] = 0;
}
for(uint8_t j=0;j<MAX_BREAKPOINT_SETS;j++) { synth[i].last_scale[j] = 0; }
synth[i].last_two[0] = 0;
synth[i].last_two[1] = 0;
synth[i].lut = NULL;
}
void amy_reset_oscs() {
// include chorus osc
for(uint16_t i=0;i<AMY_OSCS+1;i++) reset_osc(i);
// also reset filters and volume
amy_global.volume = 1.0f;
amy_global.pitch_bend = 0;
amy_global.eq[0] = F2S(1.0f);
amy_global.eq[1] = F2S(1.0f);
amy_global.eq[2] = F2S(1.0f);
reset_parametric();
// Reset chorus oscillator
if (AMY_HAS_CHORUS) config_chorus(CHORUS_DEFAULT_LEVEL, CHORUS_DEFAULT_MAX_DELAY, CHORUS_DEFAULT_LFO_FREQ, CHORUS_DEFAULT_MOD_DEPTH);
if( AMY_HAS_REVERB) config_reverb(REVERB_DEFAULT_LEVEL, REVERB_DEFAULT_LIVENESS, REVERB_DEFAULT_DAMPING, REVERB_DEFAULT_XOVER_HZ);
// Reset patches
patches_reset();
}
// the synth object keeps held state, whereas events are only deltas/changes
int8_t oscs_init() {
if(AMY_KS_OSCS>0)
ks_init();
filters_init();
algo_init();
if(pcm_samples) {
pcm_init();
}
if(AMY_HAS_CUSTOM == 1) {
custom_init();
}
events = (struct delta*)malloc_caps(sizeof(struct delta) * AMY_EVENT_FIFO_LEN, EVENTS_RAM_CAPS);
synth = (struct synthinfo*) malloc_caps(sizeof(struct synthinfo) * (AMY_OSCS+1), SYNTH_RAM_CAPS);
msynth = (struct mod_synthinfo*) malloc_caps(sizeof(struct mod_synthinfo) * (AMY_OSCS+1), SYNTH_RAM_CAPS);
block = (output_sample_type *) malloc_caps(sizeof(output_sample_type) * AMY_BLOCK_SIZE * AMY_NCHANS, BLOCK_RAM_CAPS);
// set all oscillators to their default values
amy_reset_oscs();
// make a fencepost last event with no next, time of end-1, and call it start for now, all other events get inserted before it
events[0].next = NULL;
events[0].time = UINT32_MAX - 1;
events[0].osc = 0;
events[0].data = 0;
events[0].param = NO_PARAM;
amy_global.next_event_write = 1;
amy_global.event_start = &events[0];
amy_global.event_qsize = 1; // queue will always have at least 1 thing in it
// set all the other events to empty
for(uint16_t i=1;i<AMY_EVENT_FIFO_LEN;i++) {
events[i].time = UINT32_MAX;
events[i].next = NULL;
events[i].osc = 0;
events[i].data = 0;
events[i].param = NO_PARAM;
}
fbl = (SAMPLE**) malloc_caps(sizeof(SAMPLE*) * AMY_CORES, FBL_RAM_CAPS); // one per core, just core 0 used off esp32
per_osc_fb = (SAMPLE**) malloc_caps(sizeof(SAMPLE*) * AMY_CORES, FBL_RAM_CAPS); // one per core, just core 0 used off esp32
// clear out both as local mode won't use fbl[1]
for(uint16_t core=0;core<AMY_CORES;++core) {
fbl[core]= (SAMPLE*)malloc_caps(sizeof(SAMPLE) * AMY_BLOCK_SIZE * AMY_NCHANS, FBL_RAM_CAPS);
per_osc_fb[core]= (SAMPLE*)malloc_caps(sizeof(SAMPLE) * AMY_BLOCK_SIZE, FBL_RAM_CAPS);
for(uint16_t c=0;c<AMY_NCHANS;++c) {
for(uint16_t i=0;i<AMY_BLOCK_SIZE;i++) {
fbl[core][AMY_BLOCK_SIZE*c + i] = 0;
}
}
}
// we only alloc delay lines if the chorus is turned on.
if (delay_lines == NULL)
delay_lines = (delay_line_t **)malloc(sizeof(delay_line_t *) * AMY_NCHANS);
if(AMY_HAS_CHORUS > 0 || AMY_HAS_REVERB > 0) {
for (int c = 0; c < AMY_NCHANS; ++c) delay_lines[c] = NULL;
}
//init_stereo_reverb();
total_samples = 0;
computed_delta = 0;
computed_delta_set = 0;
event_counter = 0;
message_counter = 0;
//printf("AMY online with %d oscillators, %d block size, %d cores, %d channels, %d pcm samples\n",
// AMY_OSCS, AMY_BLOCK_SIZE, AMY_CORES, AMY_NCHANS, pcm_samples);
return 0;
}
// types: 0 - show profile if set
// 1 - show profile, queue
// 2 - show profile, queue, osc data
void show_debug(uint8_t type) {
debug_flag = type;
amy_profiles_print();
if(type>0) {
struct delta * ptr = amy_global.event_start;
uint16_t q = amy_global.event_qsize;
if(q > 25) q = 25;
for(uint16_t i=0;i<q;i++) {
fprintf(stderr,"%d time %" PRIu32 " osc %d param %d - %f %d\n", i, ptr->time, ptr->osc, ptr->param, *(float *)&ptr->data, *(int *)&ptr->data);
ptr = ptr->next;
}
}
if(type>1) {
// print out all the osc data
//printf("global: filter %f resonance %f volume %f bend %f status %d\n", amy_global.filter_freq, amy_global.resonance, amy_global.volume, amy_global.pitch_bend, amy_global.status);
fprintf(stderr,"global: volume %f bend %f eq: %f %f %f \n", amy_global.volume, amy_global.pitch_bend, S2F(amy_global.eq[0]), S2F(amy_global.eq[1]), S2F(amy_global.eq[2]));
//printf("mod global: filter %f resonance %f\n", mglobal.filter_freq, mglobal.resonance);
for(uint16_t i=0;i<10 /* AMY_OSCS */;i++) {
fprintf(stderr,"osc %d: status %d wave %d mod_target %d mod_source %d velocity %flogratio %f feedback %f resonance %f step %f chained %d algo %d source %d,%d,%d,%d,%d,%d \n",
i, synth[i].status, synth[i].wave, synth[i].mod_target, synth[i].mod_source,
synth[i].velocity, synth[i].logratio, synth[i].feedback, synth[i].resonance, P2F(synth[i].step), synth[i].chained_osc,
synth[i].algorithm,
synth[i].algo_source[0], synth[i].algo_source[1], synth[i].algo_source[2], synth[i].algo_source[3], synth[i].algo_source[4], synth[i].algo_source[5] );
fprintf(stderr, " amp_coefs: %.3f %.3f %.3f %.3f %.3f %.3f %.3f\n", synth[i].amp_coefs[0], synth[i].amp_coefs[1], synth[i].amp_coefs[2], synth[i].amp_coefs[3], synth[i].amp_coefs[4], synth[i].amp_coefs[5], synth[i].amp_coefs[6]);
fprintf(stderr, " lfr_coefs: %.3f %.3f %.3f %.3f %.3f %.3f %.3f\n", synth[i].logfreq_coefs[0], synth[i].logfreq_coefs[1], synth[i].logfreq_coefs[2], synth[i].logfreq_coefs[3], synth[i].logfreq_coefs[4], synth[i].logfreq_coefs[5], synth[i].logfreq_coefs[6]);
fprintf(stderr, " flf_coefs: %.3f %.3f %.3f %.3f %.3f %.3f %.3f\n", synth[i].filter_logfreq_coefs[0], synth[i].filter_logfreq_coefs[1], synth[i].filter_logfreq_coefs[2], synth[i].filter_logfreq_coefs[3], synth[i].filter_logfreq_coefs[4], synth[i].filter_logfreq_coefs[5], synth[i].filter_logfreq_coefs[6]);
fprintf(stderr, " dut_coefs: %.3f %.3f %.3f %.3f %.3f %.3f %.3f\n", synth[i].duty_coefs[0], synth[i].duty_coefs[1], synth[i].duty_coefs[2], synth[i].duty_coefs[3], synth[i].duty_coefs[4], synth[i].duty_coefs[5], synth[i].duty_coefs[6]);
fprintf(stderr, " pan_coefs: %.3f %.3f %.3f %.3f %.3f %.3f %.3f\n", synth[i].pan_coefs[0], synth[i].pan_coefs[1], synth[i].pan_coefs[2], synth[i].pan_coefs[3], synth[i].pan_coefs[4], synth[i].pan_coefs[5], synth[i].pan_coefs[6]);
if(type>3) {
for(uint8_t j=0;j<MAX_BREAKPOINT_SETS;j++) {
fprintf(stderr," bp%d (target %d): ", j, synth[i].breakpoint_target[j]);
for(uint8_t k=0;k<MAX_BREAKPOINTS;k++) {
fprintf(stderr,"%" PRIi32 ": %f ", synth[i].breakpoint_times[j][k], synth[i].breakpoint_values[j][k]);
}
fprintf(stderr,"\n");
}
fprintf(stderr,"mod osc %d: amp: %f, logfreq %f duty %f filter_logfreq %f resonance %f fb/bw %f pan %f \n", i, msynth[i].amp, msynth[i].logfreq, msynth[i].duty, msynth[i].filter_logfreq, msynth[i].resonance, msynth[i].feedback, msynth[i].pan);
}
}
fprintf(stderr, "\n");
}
}
void oscs_deinit() {
free(block);
free(fbl[0]);
free(per_osc_fb[0]);
if(AMY_CORES>1){
free(fbl[1]);
free(per_osc_fb[1]);
}
free(fbl);
free(synth);
free(msynth);
free(events);
if(AMY_KS_OSCS > 0)
ks_deinit();
filters_deinit();
dealloc_chorus_delay_lines();
}
void osc_note_on(uint16_t osc, float initial_freq) {
//printf("Note on: osc %d wav %d filter_freq_coefs=%f %f %f %f %f %f\n", osc, synth[osc].wave,
// synth[osc].filter_logfreq_coefs[0], synth[osc].filter_logfreq_coefs[1], synth[osc].filter_logfreq_coefs[2],
// synth[osc].filter_logfreq_coefs[3], synth[osc].filter_logfreq_coefs[4], synth[osc].filter_logfreq_coefs[5]);
if(synth[osc].wave==SINE) sine_note_on(osc, initial_freq);
if(synth[osc].wave==SAW_DOWN) saw_down_note_on(osc, initial_freq);
if(synth[osc].wave==SAW_UP) saw_up_note_on(osc, initial_freq);
if(synth[osc].wave==TRIANGLE) triangle_note_on(osc, initial_freq);
if(synth[osc].wave==PULSE) pulse_note_on(osc, initial_freq);
if(synth[osc].wave==PCM) pcm_note_on(osc);
if(synth[osc].wave==ALGO) algo_note_on(osc);
if(AMY_HAS_PARTIALS == 1) {
if(synth[osc].wave==PARTIAL) partial_note_on(osc);
if(synth[osc].wave==PARTIALS) partials_note_on(osc);
}
if(AMY_HAS_CUSTOM == 1) {
if(synth[osc].wave==CUSTOM) custom_note_on(osc, initial_freq);
}
}
void apply_target_to_coefs(uint16_t osc, int target_val, int which_coef) {
// Convert a TARGET bitmask into values in all the coef vectors.
synth[osc].amp_coefs[which_coef] = (target_val & TARGET_AMP)? 1.0f : 0;
synth[osc].logfreq_coefs[which_coef] = (target_val & TARGET_FREQ)? 1.0f : 0;
synth[osc].filter_logfreq_coefs[which_coef] = (target_val & TARGET_FILTER_FREQ)? 1.0f : 0;
synth[osc].duty_coefs[which_coef] = (target_val & TARGET_DUTY)? 1.0f : 0;
synth[osc].pan_coefs[which_coef] = (target_val & TARGET_PAN)? 1.0f : 0;
}
int chained_osc_would_cause_loop(uint16_t osc, uint16_t chained_osc) {
// Check to see if chaining this osc would cause a loop.
uint16_t next_osc = chained_osc;
do {
if (next_osc == osc) {
fprintf(stderr, "chaining osc %d to osc %d would cause loop.\n",
chained_osc, osc);
return true;
}
next_osc = synth[next_osc].chained_osc;
} while(AMY_IS_SET(next_osc));
return false;
}
// play an event, now -- tell the audio loop to start making noise
void play_event(struct delta d) {
AMY_PROFILE_START(PLAY_EVENT)
//fprintf(stderr,"play_event: time %d osc %d param %d val 0x%x, qsize %d\n", total_samples, d.osc, d.param, d.data, global.event_qsize);
uint8_t trig=0;
// todo: event-only side effect, remove
if(d.param == MIDI_NOTE) {
synth[d.osc].midi_note = *(uint16_t *)&d.data;
//synth[d.osc].freq = freq_for_midi_note(*(uint16_t *)&d.data);
//synth[d.osc].logfreq_coefs[0] = logfreq_for_midi_note(*(uint16_t *)&d.data);
//printf("time %lld osc %d midi_note %d logfreq %f\n", total_samples, d.osc, synth[d.osc].midi_note, synth[d.osc].logfreq);
// Midi note and Velocity are propagated to chained_osc.
if (AMY_IS_SET(synth[d.osc].chained_osc)) {
d.osc = synth[d.osc].chained_osc;
// Recurse with the new osc. We have to recurse rather than directly setting so that a complete chain of recursion will work.
play_event(d);
}
}
if(d.param == WAVE) {
synth[d.osc].wave = *(uint16_t *)&d.data;
// todo: event-only side effect, remove
// we do this because we need to set up LUTs for FM oscs. it's a TODO to make this cleaner
if(synth[d.osc].wave == SINE) {
sine_note_on(d.osc, freq_of_logfreq(synth[d.osc].logfreq_coefs[0]));
}
}
if(d.param == PHASE) synth[d.osc].phase = *(PHASOR *)&d.data; // PHASOR
if(d.param == PATCH) synth[d.osc].patch = *(uint16_t *)&d.data;
if(d.param == FEEDBACK) synth[d.osc].feedback = *(float *)&d.data;
if(d.param >= AMP && d.param < AMP + NUM_COMBO_COEFS)
synth[d.osc].amp_coefs[d.param - AMP] = *(float *)&d.data;
if(d.param >= FREQ && d.param < FREQ + NUM_COMBO_COEFS)
synth[d.osc].logfreq_coefs[d.param - FREQ] = *(float *)&d.data;
if(d.param >= FILTER_FREQ && d.param < FILTER_FREQ + NUM_COMBO_COEFS)
synth[d.osc].filter_logfreq_coefs[d.param - FILTER_FREQ] = *(float *)&d.data;
if(d.param >= DUTY && d.param < DUTY + NUM_COMBO_COEFS)
synth[d.osc].duty_coefs[d.param - DUTY] = *(float *)&d.data;
if(d.param >= PAN && d.param < PAN + NUM_COMBO_COEFS)
synth[d.osc].pan_coefs[d.param - PAN] = *(float *)&d.data;
if(d.param == BP0_TARGET) {
synth[d.osc].breakpoint_target[0] = *(uint16_t *)&d.data;
//trig = 1;
apply_target_to_coefs(d.osc, synth[d.osc].breakpoint_target[0], COEF_EG0);
}
if(d.param == BP1_TARGET) {
synth[d.osc].breakpoint_target[1] = *(uint16_t *)&d.data;
//trig=1;
apply_target_to_coefs(d.osc, synth[d.osc].breakpoint_target[1], COEF_EG1);
}
// todo, i really should clean this up
if(d.param >= BP_START && d.param < BP_END) {
uint8_t pos = d.param - BP_START;
uint8_t bp_set = 0;
if(pos > (MAX_BREAKPOINTS * 2)) { bp_set = 1; pos = pos - (MAX_BREAKPOINTS * 2); }
if(pos % 2 == 0) {
synth[d.osc].breakpoint_times[bp_set][pos / 2] = *(uint32_t *)&d.data;
} else {
synth[d.osc].breakpoint_values[bp_set][(pos-1) / 2] = *(float *)&d.data;
}
//trig=1;
}
if(trig) synth[d.osc].note_on_clock = total_samples;
if(d.param == CHAINED_OSC) {
int chained_osc = *(int16_t *)&d.data;
if (chained_osc >=0 && chained_osc < AMY_OSCS &&
!chained_osc_would_cause_loop(d.osc, chained_osc))
synth[d.osc].chained_osc = chained_osc;
else
AMY_UNSET(synth[d.osc].chained_osc);
}
if(d.param == CLONE_OSC) { clone_osc(d.osc, *(int16_t *)&d.data); }
if(d.param == RESET_OSC) { if(*(int16_t *)&d.data>AMY_OSCS) { amy_reset_oscs(); } else { reset_osc(*(int16_t *)&d.data); } }
// todo: event-only side effect, remove
if(d.param == MOD_SOURCE) { synth[d.osc].mod_source = *(uint16_t *)&d.data; synth[*(uint16_t *)&d.data].status = IS_MOD_SOURCE; }
if(d.param == MOD_TARGET) {
synth[d.osc].mod_target = *(uint16_t *)&d.data;
apply_target_to_coefs(d.osc, synth[d.osc].mod_target, COEF_MOD);
}
if(d.param == RATIO) synth[d.osc].logratio = *(float *)&d.data;
if(d.param == FILTER_TYPE) synth[d.osc].filter_type = *(uint8_t *)&d.data;
if(d.param == RESONANCE) synth[d.osc].resonance = *(float *)&d.data;
if(d.param == ALGORITHM) synth[d.osc].algorithm = *(uint8_t *)&d.data;
if(d.param >= ALGO_SOURCE_START && d.param < ALGO_SOURCE_END) {
uint16_t which_source = d.param - ALGO_SOURCE_START;
synth[d.osc].algo_source[which_source] = d.data;
if(AMY_IS_SET(synth[d.osc].algo_source[which_source]))
synth[synth[d.osc].algo_source[which_source]].status = IS_ALGO_SOURCE;
}
// for global changes, just make the change, no need to update the per-osc synth
if(d.param == VOLUME) amy_global.volume = *(float *)&d.data;
if(d.param == PITCH_BEND) amy_global.pitch_bend = *(float *)&d.data;
if(d.param == LATENCY) { amy_global.latency_ms = *(uint16_t *)&d.data; computed_delta_set = 0; computed_delta = 0; }
if(d.param == EQ_L) amy_global.eq[0] = F2S(powf(10, *(float *)&d.data / 20.0));
if(d.param == EQ_M) amy_global.eq[1] = F2S(powf(10, *(float *)&d.data / 20.0));
if(d.param == EQ_H) amy_global.eq[2] = F2S(powf(10, *(float *)&d.data / 20.0));
// triggers / envelopes
// the only way a sound is made is if velocity (note on) is >0.
// Ignore velocity events if we've already received one this frame. This may be due to a loop in chained_oscs.
if(d.param == VELOCITY) {
if (*(float *)&d.data > 0) { // new note on (even if something is already playing on this osc)
//synth[d.osc].amp_coefs[COEF_CONST] = *(float *)&d.data; // these could be decoupled, later
synth[d.osc].velocity = *(float *)&d.data;
synth[d.osc].status = AUDIBLE;
// take care of fm & ks first -- no special treatment for bp/mod
if(synth[d.osc].wave==KS) {
#if AMY_KS_OSCS > 0
ks_note_on(d.osc);
#endif
} else {
// an osc came in with a note on.
// start the bp clock
AMY_UNSET(synth[d.osc].note_off_clock);
synth[d.osc].note_on_clock = total_samples; //esp_timer_get_time() / 1000;
// if there was a filter active for this voice, reset it
if(synth[d.osc].filter_type != FILTER_NONE) reset_filter(d.osc);
// For repeatability, start at zero phase.
synth[d.osc].phase = 0;
// restart the waveforms
// Guess at the initial frequency depending only on const & note. Envelopes not "developed" yet.
float initial_logfreq = synth[d.osc].logfreq_coefs[0];
if (AMY_IS_SET(synth[d.osc].midi_note))
initial_logfreq += synth[d.osc].logfreq_coefs[1] * logfreq_for_midi_note(synth[d.osc].midi_note);
float initial_freq = freq_of_logfreq(initial_logfreq);
osc_note_on(d.osc, initial_freq);
// trigger the mod source, if we have one
if(AMY_IS_SET(synth[d.osc].mod_source)) {
synth[synth[d.osc].mod_source].note_on_clock = total_samples; // Need a note_on_clock to have envelope work correctly.
if(synth[synth[d.osc].mod_source].wave==SINE) sine_mod_trigger(synth[d.osc].mod_source);
if(synth[synth[d.osc].mod_source].wave==SAW_DOWN) saw_up_mod_trigger(synth[d.osc].mod_source);
if(synth[synth[d.osc].mod_source].wave==SAW_UP) saw_down_mod_trigger(synth[d.osc].mod_source);
if(synth[synth[d.osc].mod_source].wave==TRIANGLE) triangle_mod_trigger(synth[d.osc].mod_source);
if(synth[synth[d.osc].mod_source].wave==PULSE) pulse_mod_trigger(synth[d.osc].mod_source);
if(synth[synth[d.osc].mod_source].wave==PCM) pcm_mod_trigger(synth[d.osc].mod_source);
if(synth[synth[d.osc].mod_source].wave==CUSTOM) custom_mod_trigger(synth[d.osc].mod_source);
}
}
} else if(synth[d.osc].velocity > 0 && *(float *)&d.data == 0) { // new note off
// DON'T clear velocity, we still need to reference it in decay.
//synth[d.osc].velocity = 0;
if(synth[d.osc].wave==KS) {
#if AMY_KS_OSCS > 0
ks_note_off(d.osc);
#endif
}
else if(synth[d.osc].wave==ALGO) { algo_note_off(d.osc); }
else if(synth[d.osc].wave==PARTIAL) {
#if AMY_HAS_PARTIALS == 1
partial_note_off(d.osc);
#endif
}
else if(synth[d.osc].wave==PARTIALS) {
#if AMY_HAS_PARTIALS == 1
partials_note_off(d.osc);
#endif
}
else if(synth[d.osc].wave==PCM) { pcm_note_off(d.osc); }
else if(synth[d.osc].wave==CUSTOM) {
#if AMY_HAS_CUSTOM == 1
custom_note_off(d.osc);
#endif
}
else {
// osc note off, start release
AMY_UNSET(synth[d.osc].note_on_clock);
synth[d.osc].note_off_clock = total_samples;
}