/**
* Register a sequencer client.
* @param seq Sequencer object
* @param name Name of sequencer client
* @param callback Sequencer client callback or NULL for a source client.
* @param data User data to pass to the \a callback
* @return Unique sequencer ID or #FLUID_FAILED on error
*
* Clients can be sources or destinations of events. Sources don't need to
* register a callback.
*/
short
fluid_sequencer_register_client (fluid_sequencer_t* seq, const char *name,
fluid_event_callback_t callback, void* data)
{
fluid_sequencer_client_t * client;
char * nameCopy;
client = FLUID_NEW(fluid_sequencer_client_t);
if (client == NULL) {
fluid_log(FLUID_PANIC, "sequencer: Out of memory\n");
return FLUID_FAILED;
}
nameCopy = FLUID_STRDUP(name);
if (nameCopy == NULL) {
fluid_log(FLUID_PANIC, "sequencer: Out of memory\n");
FLUID_FREE(client);
return FLUID_FAILED;
}
seq->clientsID++;
client->name = nameCopy;
client->id = seq->clientsID;
client->callback = callback;
client->data = data;
seq->clients = fluid_list_append(seq->clients, (void *)client);
return (client->id);
}
fluid_evt_heap_t*
_fluid_evt_heap_init(int nbEvents)
{
#ifdef HEAP_WITH_DYNALLOC
int i;
fluid_evt_heap_t* heap;
fluid_evt_entry *tmp;
heap = FLUID_NEW(fluid_evt_heap_t);
if (heap == NULL) {
fluid_log(FLUID_PANIC, "sequencer: Out of memory\n");
return NULL;
}
heap->freelist = NULL;
fluid_mutex_init(heap->mutex);
/* LOCK */
fluid_mutex_lock(heap->mutex);
/* Allocate the event entries */
for (i = 0; i < nbEvents; i++) {
tmp = FLUID_NEW(fluid_evt_entry);
tmp->next = heap->freelist;
heap->freelist = tmp;
}
/* UNLOCK */
fluid_mutex_unlock(heap->mutex);
#else
int i;
fluid_evt_heap_t* heap;
int siz = 2*sizeof(fluid_evt_entry *) + sizeof(fluid_evt_entry)*nbEvents;
heap = (fluid_evt_heap_t *)FLUID_MALLOC(siz);
if (heap == NULL) {
fluid_log(FLUID_PANIC, "sequencer: Out of memory\n");
return NULL;
}
FLUID_MEMSET(heap, 0, siz);
/* link all heap events */
{
fluid_evt_entry *tmp = &(heap->pool);
for (i = 0 ; i < nbEvents - 1 ; i++)
tmp[i].next = &(tmp[i+1]);
tmp[nbEvents-1].next = NULL;
/* set head & tail */
heap->tail = &(tmp[nbEvents-1]);
heap->head = &(heap->pool);
}
#endif
return (heap);
}
/* Create event_entry and append to the preQueue.
* May be called from the main thread (usually) but also recursively
* from the queue thread, when a callback itself does an insert... */
static void
_fluid_seq_queue_pre_remove(fluid_sequencer_t* seq, short src, short dest, int type)
{
fluid_evt_entry * evtentry = _fluid_seq_heap_get_free(seq->heap);
if (evtentry == NULL) {
/* should not happen */
fluid_log(FLUID_PANIC, "sequencer: no more free events\n");
return;
}
evtentry->next = NULL;
evtentry->entryType = FLUID_EVT_ENTRY_REMOVE;
{
fluid_event_t* evt = &(evtentry->evt);
fluid_event_set_source(evt, src);
fluid_event_set_source(evt, src);
fluid_event_set_dest(evt, dest);
evt->type = type;
}
fluid_mutex_lock(seq->mutex);
/* append to preQueue */
if (seq->preQueueLast) {
seq->preQueueLast->next = evtentry;
} else {
seq->preQueue = evtentry;
}
seq->preQueueLast = evtentry;
fluid_mutex_unlock(seq->mutex);
return;
}
/* Create event_entry and append to the preQueue.
* May be called from the main thread (usually) but also recursively
* from the queue thread, when a callback itself does an insert... */
static short
_fluid_seq_queue_pre_insert(fluid_sequencer_t* seq, fluid_event_t * evt)
{
fluid_evt_entry * evtentry = _fluid_seq_heap_get_free(seq->heap);
if (evtentry == NULL) {
/* should not happen */
fluid_log(FLUID_PANIC, "sequencer: no more free events\n");
return -1;
}
evtentry->next = NULL;
evtentry->entryType = FLUID_EVT_ENTRY_INSERT;
FLUID_MEMCPY(&(evtentry->evt), evt, sizeof(fluid_event_t));
fluid_mutex_lock(seq->mutex);
/* append to preQueue */
if (seq->preQueueLast) {
seq->preQueueLast->next = evtentry;
} else {
seq->preQueue = evtentry;
}
seq->preQueueLast = evtentry;
fluid_mutex_unlock(seq->mutex);
return (0);
}
static short
_fluid_seq_queue_init(fluid_sequencer_t* seq, int maxEvents)
{
seq->heap = _fluid_evt_heap_init(maxEvents);
if (seq->heap == NULL) {
fluid_log(FLUID_PANIC, "sequencer: Out of memory\n");
return -1;
}
seq->preQueue = NULL;
seq->preQueueLast = NULL;
FLUID_MEMSET(seq->queue0, 0, 2*256*sizeof(fluid_evt_entry *));
FLUID_MEMSET(seq->queue1, 0, 2*255*sizeof(fluid_evt_entry *));
seq->queueLater = NULL;
seq->queue0StartTime = fluid_sequencer_get_tick(seq);
seq->prevCellNb = -1;
fluid_mutex_init(seq->mutex);
/* start timer */
if (seq->useSystemTimer) {
seq->timer = new_fluid_timer((int)(1000/seq->scale), _fluid_seq_queue_process,
(void *)seq, TRUE, FALSE, TRUE);
}
return (0);
}
void Chorus::update()
{
/* The modulating LFO goes through a full period every x samples: */
modulation_period_samples = lrint(sample_rate / speed_Hz);
/* The variation in delay time is x: */
int modulation_depth_samples = (int)
(depth_ms / 1000.0 /* convert modulation depth in ms to s*/
* sample_rate);
if (modulation_depth_samples > MAX_SAMPLES) {
fluid_log(FLUID_WARN, "chorus: Too high depth. Setting it to max (%d).", MAX_SAMPLES);
modulation_depth_samples = MAX_SAMPLES;
}
/* initialize LFO table */
if (type == FLUID_CHORUS_MOD_SINE)
sine(lookup_tab, modulation_period_samples, modulation_depth_samples);
else if (type == FLUID_CHORUS_MOD_TRIANGLE)
triangle(lookup_tab, modulation_period_samples, modulation_depth_samples);
else {
type = FLUID_CHORUS_MOD_SINE;
sine(lookup_tab, modulation_period_samples, modulation_depth_samples);
}
for (int i = 0; i < number_blocks; i++) {
/* Set the phase of the chorus blocks equally spaced */
phase[i] = (int) ((double) modulation_period_samples
* (double) i / (double) number_blocks);
}
/* Start of the circular buffer */
counter = 0;
}
/**
* Create a new sequencer object.
* @param use_system_timer If TRUE, sequencer will advance at the rate of the
* system clock. If FALSE, call fluid_sequencer_process() to advance
* the sequencer.
* @return New sequencer instance
* @since 1.1.0
*/
fluid_sequencer_t*
new_fluid_sequencer2 (int use_system_timer)
{
fluid_sequencer_t* seq;
seq = FLUID_NEW(fluid_sequencer_t);
if (seq == NULL) {
fluid_log(FLUID_PANIC, "sequencer: Out of memory\n");
return NULL;
}
FLUID_MEMSET(seq, 0, sizeof(fluid_sequencer_t));
seq->scale = 1000; // default value
seq->useSystemTimer = use_system_timer ? TRUE : FALSE;
seq->startMs = seq->useSystemTimer ? fluid_curtime() : 0;
seq->clients = NULL;
seq->clientsID = 0;
if (-1 == _fluid_seq_queue_init(seq, FLUID_SEQUENCER_EVENTS_MAX)) {
FLUID_FREE(seq);
fluid_log(FLUID_PANIC, "sequencer: Out of memory\n");
return NULL;
}
#if FLUID_SEQ_WITH_TRACE
seq->tracelen = 1024*100;
seq->tracebuf = (char *)FLUID_MALLOC(seq->tracelen);
if (seq->tracebuf == NULL) {
_fluid_seq_queue_end(seq);
FLUID_FREE(seq);
fluid_log(FLUID_PANIC, "sequencer: Out of memory\n");
return NULL;
}
seq->traceptr = seq->tracebuf;
#endif
return(seq);
}
/**
* Create a new sequencer event structure.
* @return New sequencer event structure or NULL if out of memory
*/
fluid_event_t*
new_fluid_event()
{
fluid_event_t* evt;
evt = FLUID_NEW(fluid_event_t);
if (evt == NULL) {
fluid_log(FLUID_PANIC, "event: Out of memory\n");
return NULL;
}
fluid_event_clear(evt);
return(evt);
}
/**
* Registers a synthesizer as a destination client of the given sequencer.
* The \a synth is registered with the name "fluidsynth".
* @param seq Sequencer instance
* @param synth Synthesizer instance
* @returns Sequencer client ID, or #FLUID_FAILED on error.
*/
short
fluid_sequencer_register_fluidsynth (fluid_sequencer_t* seq, fluid_synth_t* synth)
{
fluid_seqbind_t* seqbind;
seqbind = FLUID_NEW(fluid_seqbind_t);
if (seqbind == NULL) {
fluid_log(FLUID_PANIC, "sequencer: Out of memory\n");
return FLUID_FAILED;
}
seqbind->synth = synth;
seqbind->seq = seq;
seqbind->sample_timer = NULL;
seqbind->client_id = -1;
/* set up the sample timer */
if (!fluid_sequencer_get_use_system_timer(seq)) {
seqbind->sample_timer =
new_fluid_sample_timer(synth, fluid_seqbind_timer_callback, (void *) seqbind);
if (seqbind->sample_timer == NULL) {
fluid_log(FLUID_PANIC, "sequencer: Out of memory\n");
delete_fluid_seqbind(seqbind);
return FLUID_FAILED;
}
}
/* register fluidsynth itself */
seqbind->client_id =
fluid_sequencer_register_client(seq, "fluidsynth", fluid_seq_fluidsynth_callback, (void *)seqbind);
if (seqbind->client_id == -1) {
delete_fluid_seqbind(seqbind);
return FLUID_FAILED;
}
return seqbind->client_id;
}
/**
* Set the time scale of a sequencer.
* @param seq Sequencer object
* @param scale Sequencer scale value in ticks per second
* (default is 1000 for 1 tick per millisecond, max is 1000.0)
*
* If there are already scheduled events in the sequencer and the scale is changed
* the events are adjusted accordingly.
*/
void
fluid_sequencer_set_time_scale (fluid_sequencer_t* seq, double scale)
{
if (scale <= 0) {
fluid_log(FLUID_WARN, "sequencer: scale <= 0 : %f\n", scale);
return;
}
if (scale > 1000.0)
// Otherwise : problems with the timer = 0ms...
scale = 1000.0;
if (seq->scale != scale) {
double oldScale = seq->scale;
// stop timer
if (seq->timer) {
delete_fluid_timer(seq->timer);
seq->timer = NULL;
}
seq->scale = scale;
// change start0 so that cellNb is preserved
seq->queue0StartTime = (seq->queue0StartTime + seq->prevCellNb)*(seq->scale/oldScale) - seq->prevCellNb;
// change all preQueue events for new scale
{
fluid_evt_entry* tmp;
tmp = seq->preQueue;
while (tmp) {
if (tmp->entryType == FLUID_EVT_ENTRY_INSERT)
tmp->evt.time = tmp->evt.time*seq->scale/oldScale;
tmp = tmp->next;
}
}
/* re-start timer */
if (seq->useSystemTimer) {
seq->timer = new_fluid_timer((int)(1000/seq->scale), _fluid_seq_queue_process, (void *)seq, TRUE, FALSE, TRUE);
}
}
}