void
filter_midi_onechannelfilter(MidiFilter* self,
uint32_t tme,
const uint8_t* const buffer,
uint32_t size)
{
if (size > 3) {
forge_midimessage(self, tme, buffer, size);
return;
}
int chn = buffer[0]&0x0f;
switch (buffer[0] & 0xf0) {
case MIDI_NOTEOFF:
case MIDI_NOTEON:
case MIDI_POLYKEYPRESSURE:
case MIDI_CONTROLCHANGE:
case MIDI_PROGRAMCHANGE:
case MIDI_CHANNELPRESSURE:
case MIDI_PITCHBEND:
if (rintf(*(self->cfg[0])) == chn + 1) {
forge_midimessage(self, tme, buffer, size);
}
break;
default:
forge_midimessage(self, tme, buffer, size);
break;
}
}
static void filter_preproc_miditranspose(MidiFilter* self) {
if (floor(self->lcfg[1]) == floor(*self->cfg[1])) return;
const int transp = rint(*(self->cfg[1]));
int c,k;
uint8_t buf[3];
buf[2] = 0;
for (c=0; c < 16; ++c) {
#if 0 /* send "all notes off" */
buf[0] = MIDI_CONTROLCHANGE | c;
buf[1] = 123;
forge_midimessage(self, tme, buf, 3);
// send "all sound off"
buf[0] = 0xb0 | i;
buf[1] = 120;
forge_midimessage(self, tme, buf, 3);
#else /* re-transpose playing notes */
for (k=0; k < 127; ++k) {
if (!self->memCM[c][k]) continue;
buf[0] = MIDI_NOTEOFF | c;
buf[1] = midi_limit_val(k + self->memCI[c][k]);
buf[2] = 0;
forge_midimessage(self, 0, buf, 3);
buf[0] = MIDI_NOTEON | c;
buf[1] = midi_limit_val(k + transp);
buf[2] = self->memCM[c][k];
self->memCI[c][k] = transp;
forge_midimessage(self, 0, buf, 3);
}
#endif
}
}
static void filter_preproc_mapkeyscale(MidiFilter* self) {
int i;
int identical_cfg = 1;
int keymap[12];
for (i=0; i < 12; ++i) {
keymap[i] = RAIL(floorf(*self->cfg[i+1]), -13, 12);
if (floorf(self->lcfg[i+1]) != floorf(*self->cfg[i+1])) {
identical_cfg = 0;
}
}
if (identical_cfg) return;
int c,k;
uint8_t buf[3];
buf[2] = 0;
for (c=0; c < 16; ++c) {
for (k=0; k < 127; ++k) {
int note;
const int n = 1 + k%12;
if (!self->memCM[c][k]) continue;
if (floorf(self->lcfg[n]) == floorf(*self->cfg[n])) continue;
note = k + self->memCI[c][k];
if (midi_valid(note)) {
note = midi_limit_val(note);
if (self->memCS[c][note] > 0) {
self->memCS[c][note]--;
if (self->memCS[c][note] == 0) {
buf[0] = MIDI_NOTEOFF | c;
buf[1] = note;
buf[2] = 0;
forge_midimessage(self, 0, buf, 3);
}
}
}
note = k + keymap[k%12];
if (midi_valid(note)) {
note = midi_limit_val(note);
buf[0] = MIDI_NOTEON | c;
buf[1] = note;
buf[2] = self->memCM[c][k];
self->memCI[c][k] = note - k;
self->memCS[c][note]++;
if (self->memCS[c][note] == 1) {
forge_midimessage(self, 0, buf, 3);
}
} else {
self->memCM[c][k] = 0;
self->memCI[c][k] = -1000;
}
}
}
}
/* *****************************************************************************
* the actual "process" function, called for every midi event
*/
static void
filter_midimessage (MidiMap* self,
uint32_t tme,
const uint8_t* const mmsg,
const uint32_t size)
{
if (!self->rules || size > MAX_MSG) {
/* just foward */
forge_midimessage (self, tme, mmsg, size);
return;
}
bool matched = false;
// TODO if "match-all" is set, use tree with masked status-bit as
// 1st level hash-table
const unsigned int rc = self->rules->count;
for (unsigned int i = 0; i < rc; ++i) {
Rule *r = &self->rules->rule[i];
uint8_t msg[MAX_MSG];
uint32_t b;
if ((r->len != size)) {
continue;
}
bool match = true;
for (b = 0; b < size && match; ++b) {
// TODO also allow >= or <= comparators
if ((mmsg[b] & r->mask[b]) != r->match[b]) {
match = false;
}
}
if (!match) {
continue;
}
for (b = 0; b < r->len; ++b) {
// TODO also allow += and *= operators
// and map bytes ?
msg[b] = (mmsg[b] & r->tx_mask[b]) | r->tx_set[b];
}
for (;b < r->tx_len; ++b) {
msg[b] = r->tx_set[b];
}
forge_midimessage (self, tme, msg, r->tx_len);
matched = true;
if (!self->rules->match_all) {
break;
}
}
if (!matched && self->rules->forward_unmatched) {
forge_midimessage (self, tme, mmsg, size);
}
}
static void
filter_postproc_midistrum(MidiFilter* self)
{
int i;
const int max_delay = self->memI[0];
const int roff = self->memI[1];
const int woff = self->memI[2];
const uint32_t n_samples = self->n_samples;
int skipped = 0;
filter_midistrum_process(self, n_samples);
for (i=0; i < max_delay; ++i) {
const int off = (i + roff) % max_delay;
if (self->memQ[off].size > 0) {
if (self->memQ[off].reltime < n_samples) {
if (self->memQ[off].size == 3 && (self->memQ[off].buf[0] & 0xf0) == MIDI_NOTEON) {
const uint8_t chn = self->memQ[off].buf[0] & 0x0f;
const uint8_t key = self->memQ[off].buf[1] & 0x7f;
self->memCS[chn][key]++;
if (self->memCS[chn][key] > 1) { // send a note-off first
uint8_t buf[3];
buf[0] = MIDI_NOTEOFF | chn;
buf[1] = key; buf[2] = 0;
forge_midimessage(self, self->memQ[off].reltime, buf, 3);
}
forge_midimessage(self, self->memQ[off].reltime, self->memQ[off].buf, self->memQ[off].size);
}
else if (self->memQ[off].size == 3 && (self->memQ[off].buf[0] & 0xf0) == MIDI_NOTEOFF) {
const uint8_t chn = self->memQ[off].buf[0] & 0x0f;
const uint8_t key = self->memQ[off].buf[1] & 0x7f;
if (self->memCS[chn][key] > 0) {
self->memCS[chn][key]--;
if (self->memCS[chn][key] == 0) {
forge_midimessage(self, self->memQ[off].reltime, self->memQ[off].buf, self->memQ[off].size);
}
}
} else {
forge_midimessage(self, self->memQ[off].reltime, self->memQ[off].buf, self->memQ[off].size);
}
self->memQ[off].size = 0;
if (!skipped) self->memI[1] = (self->memI[1] + 1) % max_delay;
} else {
self->memQ[off].reltime -= n_samples;
skipped = 1;
}
} else if (!skipped) self->memI[1] = off;
if (off == woff) break;
}
self->memI[3] = (self->memI[3] + n_samples)%MSC_MAX;
}
static void filter_preproc_keyrange(MidiFilter* self) {
if ( floorf(self->lcfg[1]) == floorf(*self->cfg[1])
&& floorf(self->lcfg[2]) == floorf(*self->cfg[2])
&& floorf(self->lcfg[3]) == floorf(*self->cfg[3])
) return;
int c,k;
uint8_t buf[3];
buf[2] = 0;
const int mode = RAIL(floorf(*self->cfg[3]),0, 3);
const uint8_t low = midi_limit_val(floorf(*self->cfg[1]));
const uint8_t upp = midi_limit_val(floorf(*self->cfg[2]));
for (c=0; c < 16; ++c) {
for (k=0; k < 127; ++k) {
const uint8_t vel = self->memCM[c][k];
if (vel == 0) continue;
if (mode != 0 && (k >= low && k <= upp) ^ (mode == 2)) continue;
buf[0] = MIDI_NOTEOFF | c;
buf[1] = midi_limit_val(k + self->memCI[c][k]);
forge_midimessage(self, 0, buf, 3);
self->memCM[c][k] = 0;
}
}
}
static void
filter_postproc_sostenuto(MidiFilter* self)
{
int i;
const int max_delay = self->memI[0];
const int roff = self->memI[1];
const int woff = self->memI[2];
uint32_t n_samples = self->n_samples;
int skipped = 0;
/* only process until given time */
if (self->memI[3] > 0)
n_samples = MIN(self->memI[3], n_samples);
for (i=0; i < max_delay; ++i) {
const int off = (i + roff) % max_delay;
if (self->memQ[off].size > 0) {
if (self->memQ[off].reltime < n_samples) {
forge_midimessage(self, self->memQ[off].reltime, self->memQ[off].buf, self->memQ[off].size);
self->memQ[off].size = 0;
if (!skipped) self->memI[1] = (self->memI[1] + 1) % max_delay;
} else {
/* don't decrement time if called from filter_midi_sostenuto() */
if (self->memI[3] < 0) {self->memQ[off].reltime -= n_samples;}
skipped = 1;
}
} else if (!skipped) self->memI[1] = off;
if (off == woff) break;
}
}
static void filter_preproc_enforcescale(MidiFilter* self) {
if (floorf(self->lcfg[1]) == floorf(*self->cfg[1])) return;
const int scale = RAIL(floorf(*self->cfg[1]), 0, 11);
int c,k;
uint8_t buf[3];
buf[2] = 0;
for (c=0; c < 16; ++c) {
for (k=0; k < 127; ++k) {
if (self->memCS[c][k] ==0) continue;
if (filter_enforcescale_check(scale, k)) {
self->memCI[c][k] = 0;
continue;
}
buf[0] = MIDI_NOTEOFF | c;
buf[1] = midi_limit_val(k);
buf[2] = 0;
forge_midimessage(self, 0, buf, 3);
self->memCS[c][k] = 0;
self->memCI[c][k] = 0;
}
}
}
static inline void filter_midistrum_panic(MidiFilter* self, const uint8_t c, const uint32_t tme) {
int i,k;
const int max_delay = self->memI[0];
for (i=0; i < max_delay; ++i) {
if (self->memQ[i].size == 3
&& (self->memQ[i].buf[0] & 0xf0) != 0xf0
&& (self->memQ[i].buf[0] & 0x0f) != c)
continue;
self->memQ[i].size = 0;
}
self->memI[4] = 0; // collection stattime
self->memI[5] = 0; // collected notes
self->memI[6] = 0; // stroke direction
for (k=0; k < 127; ++k) {
if (self->memCS[c][k]) {
uint8_t buf[3];
buf[0] = MIDI_NOTEOFF | c;
buf[1] = k; buf[2] = 0;
forge_midimessage(self, tme, buf, 3);
}
self->memCS[c][k] = 0; // count note-on per key
}
}
static void
filter_midi_keyrange(MidiFilter* self,
uint32_t tme,
const uint8_t* const buffer,
uint32_t size)
{
const int mode = RAIL(floorf(*self->cfg[3]),0, 3);
const uint8_t chs = midi_limit_chn(floorf(*self->cfg[0]) -1);
const uint8_t chn = buffer[0] & 0x0f;
uint8_t mst = buffer[0] & 0xf0;
if (size != 3
|| !(mst == MIDI_NOTEON || mst == MIDI_NOTEOFF)
|| !(floorf(*self->cfg[0]) == 0 || chs == chn)
|| mode == 0
)
{
forge_midimessage(self, tme, buffer, size);
return;
}
const uint8_t low = midi_limit_val(floorf(*self->cfg[1]));
const uint8_t upp = midi_limit_val(floorf(*self->cfg[2]));
const uint8_t key = buffer[1] & 0x7f;
const uint8_t vel = buffer[2] & 0x7f;
if (mst == MIDI_NOTEON && vel ==0 ) {
mst = MIDI_NOTEOFF;
}
switch(mst) {
case MIDI_NOTEON:
if ((key >= low && key <= upp) ^ (mode == 2)) {
forge_midimessage(self, tme, buffer, size);
self->memCM[chn][key] = vel;
}
break;
case MIDI_NOTEOFF:
if (self->memCM[chn][key] > 0) {
forge_midimessage(self, tme, buffer, size);
}
self->memCM[chn][key] = 0;
break;
}
}
static inline void filter_midichord_noteon(MidiFilter* self, uint32_t tme, uint8_t chn, int note, uint8_t vel) {
uint8_t buf[3];
if (!midi_valid(note)) return;
buf[0] = MIDI_NOTEON | chn;
buf[1] = note;
buf[2] = vel;
self->memCS[chn][note]++;
if (self->memCS[chn][note] == 1) {
forge_midimessage(self, tme, buf, 3);
}
}
static inline void filter_enforcescale_panic(MidiFilter* self, const uint8_t c, const uint32_t tme) {
int k;
for (k=0; k < 127; ++k) {
if (self->memCS[c][k] > 0) {
uint8_t buf[3];
buf[0] = MIDI_NOTEOFF | c;
buf[1] = k;
buf[2] = 0;
forge_midimessage(self, tme, buf, 3);
}
self->memCI[c][k] = 0; // current key transpose
self->memCS[c][k] = 0; // count note-on per key
}
}
static inline void filter_midichord_panic(MidiFilter* self, const uint8_t c, const uint32_t tme) {
int k;
for (k=0; k < 127; ++k) {
if (self->memCS[c][k] > 0) {
uint8_t buf[3];
buf[0] = MIDI_NOTEOFF | c;
buf[1] = k;
buf[2] = 0;
forge_midimessage(self, tme, buf, 3);
}
self->memCI[c][k] = -1000; // current chord for this key
self->memCS[c][k] = 0; // count note-on per key
self->memCM[c][k] = 0; // last known velocity for this key
}
}
static void mctl_cb(int fnid, const char *fn, unsigned char val, midiCCmap *mm, void *arg) {
B3S* b3s = (B3S*)arg;
#ifdef DEBUGPRINT
fprintf(stderr, "xfn: %d (\"%s\", %d) mm:%s\n", fnid, fn, val, mm?"yes":"no");
#endif
if (b3s->midiout && mm) {
while (mm) {
#ifdef DEBUGPRINT
fprintf(stderr, "MIDI FEEDBACK %d %d %d\n", mm->channel, mm->param, val);
#endif
uint8_t msg[3];
msg[0] = 0xb0 | (mm->channel&0x0f); // Control Change
msg[1] = mm->param;
msg[2] = val;
forge_midimessage(&b3s->forge, &b3s->uris, msg, 3);
mm = mm->next;
}
}
if (b3s->midiout && fn && !b3s->suspend_ui_msg) {
forge_kvcontrolmessage(&b3s->forge, &b3s->uris, fn, (int32_t) val);
}
}
static inline void filter_ntapdelay_panic(MidiFilter* self, const uint8_t c, const uint32_t tme) {
int i,k;
const int max_delay = self->memI[0];
for (i=0; i < max_delay; ++i) {
if (self->memQ[i].size == 3
&& (self->memQ[i].buf[0] & 0xf0) != 0xf0
&& (self->memQ[i].buf[0] & 0x0f) != c)
continue;
self->memQ[i].size = 0;
}
for (k=0; k < 127; ++k) {
if (self->memCS[c][k]) {
uint8_t buf[3];
buf[0] = MIDI_NOTEOFF | c;
buf[1] = k; buf[2] = 0;
forge_midimessage(self, tme, buf, 3);
}
self->memCS[c][k] = 0; // count note-on per key post-delay
self->memCM[c][k] = 0; // remember velocity of note-on
self->memCI[c][k] = -1; // remember time of note-on
}
}
static void
filter_midi_enforcescale(MidiFilter* self,
uint32_t tme,
const uint8_t* const buffer,
uint32_t size)
{
const int chs = midi_limit_chn(floorf(*self->cfg[0]) -1);
const int scale = RAIL(floorf(*self->cfg[1]), 0, 11);
const int mode = RAIL(floorf(*self->cfg[2]), 0, 2);
const uint8_t chn = buffer[0] & 0x0f;
const uint8_t key = buffer[1] & 0x7f;
uint8_t mst = buffer[0] & 0xf0;
if (midi_is_panic(buffer, size)) {
filter_enforcescale_panic(self, chn, tme);
}
if (size != 3
|| !(mst == MIDI_NOTEON || mst == MIDI_NOTEOFF || mst == MIDI_POLYKEYPRESSURE)
|| !(floorf(*self->cfg[0]) == 0 || chs == chn)
)
{
forge_midimessage(self, tme, buffer, size);
return;
}
int transp = 0;
if (!filter_enforcescale_check(scale, key)) {
switch (mode) {
case 1:
transp = -1;
break;
case 2:
transp = +1;
break;
case 0: /* discard */
default:
return;
}
}
if (!midi_valid(key + transp)) {
return;
}
if (!filter_enforcescale_check(scale, key + transp)) {
return;
}
int note;
uint8_t buf[3];
memcpy(buf, buffer, 3);
switch (mst) {
case MIDI_NOTEON:
note = key + transp;
if (midi_valid(note)) {
buf[1] = note;
self->memCS[chn][note]++;
if (self->memCS[chn][note] == 1)
forge_midimessage(self, tme, buf, size);
}
self->memCI[chn][key] = transp;
break;
case MIDI_NOTEOFF:
note = key + self->memCI[chn][key];
if (midi_valid(note)) {
buf[1] = note;
if (self->memCS[chn][note] > 0) {
self->memCS[chn][note]--;
if (self->memCS[chn][note] == 0)
forge_midimessage(self, tme, buf, size);
self->memCI[chn][key] = 0;
}
}
break;
case MIDI_POLYKEYPRESSURE:
note = key + transp;
if (midi_valid(note)) {
buf[1] = note;
forge_midimessage(self, tme, buf, size);
}
break;
}
}
void
filter_midi_ntabdelay(MidiFilter* self,
const uint32_t tme,
const uint8_t* const buffer,
const uint32_t size)
{
int i;
float bpm = MAX(*self->cfg[2], 1.0);
if (*self->cfg[1] && (self->available_info & NFO_BPM)) {
bpm = self->bpm;
}
if (bpm <= 0) bpm = 60;
if (midi_is_panic(buffer, size)) {
filter_ntapdelay_panic(self, buffer[0]&0x0f, tme);
}
forge_midimessage(self, tme, buffer, size);
const uint8_t chs = midi_limit_chn(floor(*self->cfg[0]) -1);
const uint8_t chn = buffer[0] & 0x0f;
uint8_t mst = buffer[0] & 0xf0;
if (size != 3
|| !(mst == MIDI_NOTEON || mst == MIDI_NOTEOFF || mst == MIDI_POLYKEYPRESSURE)
|| !(floor(*self->cfg[0]) == 0 || chs == chn)
)
{
return;
}
if ((self->memI[2] + 1) % self->memI[0] == self->memI[1]) {
return;
}
const float grid = RAIL((*self->cfg[3]), 1/256.0, 4.0);
const double samples_per_beat = 60.0 / bpm * self->samplerate;
const uint8_t key = buffer[1] & 0x7f;
const uint8_t vel = buffer[2] & 0x7f;
uint8_t buf[3];
memcpy(buf, buffer, 3);
/* treat note-on w/velocity==0 as note-off */
if (mst == MIDI_NOTEON && vel == 0) {
mst = MIDI_NOTEOFF;
buf[0] = MIDI_NOTEOFF | chn;
}
if (mst == MIDI_NOTEON) {
self->memCI[chn][key] = tme + rint(grid * samples_per_beat);
self->memCM[chn][key] = vel;
}
else if (mst == MIDI_NOTEOFF) {
self->memCI[chn][key] = -1;
self->memCM[chn][key] = 0;
}
for (i=0; i < RAIL(*self->cfg[4], 0, 128); ++i) {
int delay = rint( grid * samples_per_beat * (i+1.0));
buf[2] = RAIL(rint(vel + (i+1.0) * (*self->cfg[5])), 1, 127);
MidiEventQueue *qm = &(self->memQ[self->memI[2]]);
memcpy(qm->buf, buf, 3);
qm->size = size;
qm->reltime = tme + delay;
self->memI[2] = (self->memI[2] + 1) % self->memI[0];
if ((self->memI[2] + 1) % self->memI[0] == self->memI[1]) {
return;
}
}
}
void
filter_midi_midistrum(MidiFilter* self,
const uint32_t tme,
const uint8_t* const buffer,
const uint32_t size)
{
uint8_t mst = buffer[0] & 0xf0;
if (size > 3) {
forge_midimessage(self, tme, buffer, size);
return;
}
if (midi_is_panic(buffer, size)) {
filter_midistrum_panic(self, buffer[0]&0x0f, tme);
}
if (size != 3 || !(mst == MIDI_NOTEON || mst == MIDI_NOTEOFF)) {
if ((self->memI[2] + 1) % self->memI[0] == self->memI[1]) {
return; // queue full
}
MidiEventQueue *qm = &(self->memQ[self->memI[2]]);
memcpy(qm->buf, buffer, size);
qm->size = size;
qm->reltime = tme;
self->memI[2] = (self->memI[2] + 1) % self->memI[0];
return;
}
float bpm = (*self->cfg[1]);
if (*self->cfg[0] && (self->available_info & NFO_BPM)) {
bpm = self->bpm;
}
if (bpm <= 0) bpm = 60;
const int strum_time = floor(self->samplerate * (*self->cfg[4]) * 60.0 / bpm);
const int max_collect = 1 + rintf(self->samplerate * (*self->cfg[3]) / 1000.0);
const uint8_t key = buffer[1] & 0x7f;
const uint8_t vel = buffer[2] & 0x7f;
if (mst == MIDI_NOTEON && vel ==0 ) {
mst = MIDI_NOTEOFF;
}
// check if we're overdue -> process collected notes, reset collection mode
filter_midistrum_process(self, tme);
/* add note-ons to collection */
if (mst == MIDI_NOTEON) {
int i;
if (self->memI[5] == 0) {
self->memI[4] = (tme + max_collect + self->memI[3]) % MSC_MAX;
}
#if 0
if ((self->available_info & NFO_BEAT)) {
const double samples_per_beat = 60.0 / self->bpm * self->samplerate;
printf("NOTE ON: %ld, %f || %f\n",
self->pos_frame + tme,
self->bar_beats + (float)tme / samples_per_beat,
self->beat_beats + (float)tme / samples_per_beat);
}
#endif
// check if note-on for this key is already queued -> skip
for (i=0; i < self->memI[5]; ++i) {
if (self->memS[i].size == 3 && self->memS[i].buf[2] == key) {
return;
}
}
MidiEventQueue *qm = &(self->memS[self->memI[5]]);
memcpy(qm->buf, buffer, size);
qm->size = size;
self->memI[5]++;
}
/* delay note-off by max-latency (= collection-time + strum-time) */
else if (mst == MIDI_NOTEOFF) {
#if 0 // TODO -- shorten delay time IF possible
int delay = strum_time + 1;
if (self->memI[5] > 0) {
delay += 1 + MSC_DIFF(self->memI[4], (self->memI[3] + tme)%MSC_MAX);
printf("add.. %d\n" , MSC_DIFF(self->memI[4], (self->memI[3] + tme)%MSC_MAX));
}
#else
const int delay = strum_time + max_collect;
#endif
// TODO filter out ignored dups from (ignored note-on) above
MidiEventQueue *qm = &(self->memQ[self->memI[2]]);
memcpy(qm->buf, buffer, size);
qm->size = size;
qm->reltime = tme + delay;
self->memI[2] = (self->memI[2] + 1) % self->memI[0];
}
}
static void
filter_midi_miditranspose(MidiFilter* self,
uint32_t tme,
const uint8_t* const buffer,
uint32_t size)
{
const int chs = midi_limit_chn(floor(*self->cfg[0]) -1);
const int transp = rint(*(self->cfg[1]));
const uint8_t chn = buffer[0] & 0x0f;
const uint8_t key = buffer[1] & 0x7f;
const uint8_t vel = buffer[2] & 0x7f;
uint8_t mst = buffer[0] & 0xf0;
if (size != 3
|| !(mst == MIDI_NOTEON || mst == MIDI_NOTEOFF || mst == MIDI_POLYKEYPRESSURE)
|| !(floor(*self->cfg[0]) == 0 || chs == chn)
)
{
forge_midimessage(self, tme, buffer, size);
return;
}
if (mst == MIDI_NOTEON && vel ==0 ) {
mst = MIDI_NOTEOFF;
}
int note;
uint8_t buf[3];
buf[0] = buffer[0];
buf[1] = buffer[1];
buf[2] = buffer[2];
switch (mst) {
case MIDI_NOTEON:
note = key + transp;
if (midi_valid(note)) {
buf[1] = note;
forge_midimessage(self, tme, buf, size);
}
self->memCM[chn][key] = vel;
self->memCI[chn][key] = transp;
break;
case MIDI_NOTEOFF:
note = key + self->memCI[chn][key];
if (midi_valid(note)) {
buf[1] = note;
forge_midimessage(self, tme, buf, size);
}
self->memCM[chn][key] = 0;
self->memCI[chn][key] = -1000;
break;
case MIDI_POLYKEYPRESSURE:
note = key + transp;
if (midi_valid(note)) {
buf[1] = note;
forge_midimessage(self, tme, buf, size);
}
break;
}
}
static void
filter_midi_mapkeyscale(MidiFilter* self,
uint32_t tme,
const uint8_t* const buffer,
uint32_t size)
{
int i;
const int chs = midi_limit_chn(floorf(*self->cfg[0]) -1);
int keymap[12];
for (i=0; i < 12; ++i) {
keymap[i] = RAIL(floorf(*self->cfg[i+1]), -13, 12);
}
const uint8_t chn = buffer[0] & 0x0f;
uint8_t mst = buffer[0] & 0xf0;
if (midi_is_panic(buffer, size)) {
filter_mapkeyscale_panic(self, chn, tme);
}
if (size != 3
|| !(mst == MIDI_NOTEON || mst == MIDI_NOTEOFF || mst == MIDI_POLYKEYPRESSURE)
|| !(floorf(*self->cfg[0]) == 0 || chs == chn)
)
{
forge_midimessage(self, tme, buffer, size);
return;
}
const uint8_t key = buffer[1] & 0x7f;
const uint8_t vel = buffer[2] & 0x7f;
if (mst == MIDI_NOTEON && vel ==0 ) {
mst = MIDI_NOTEOFF;
}
int note;
uint8_t buf[3];
memcpy(buf, buffer, 3);
switch (mst) {
case MIDI_NOTEON:
if (keymap[key%12] < -12) return;
note = key + keymap[key%12];
// TODO keep track of dup result note-on -- see enforcescale.c
if (midi_valid(note)) {
buf[1] = note;
self->memCS[chn][note]++;
if (self->memCS[chn][note] == 1) {
forge_midimessage(self, tme, buf, size);
}
self->memCM[chn][key] = vel;
self->memCI[chn][key] = note - key;
}
break;
case MIDI_NOTEOFF:
note = key + self->memCI[chn][key];
if (midi_valid(note)) {
buf[1] = note;
if (self->memCS[chn][note] > 0) {
self->memCS[chn][note]--;
if (self->memCS[chn][note] == 0)
forge_midimessage(self, tme, buf, size);
}
}
self->memCM[chn][key] = 0;
self->memCI[chn][key] = -1000;
break;
case MIDI_POLYKEYPRESSURE:
if (keymap[key%12] < -12) return;
note = key + keymap[key%12];
if (midi_valid(note)) {
buf[1] = note;
forge_midimessage(self, tme, buf, size);
}
break;
}
}
static void
filter_midi_midichord(MidiFilter* self,
uint32_t tme,
const uint8_t* const buffer,
uint32_t size)
{
int i;
const int chs = midi_limit_chn(floor(*self->cfg[0]) -1);
const int scale = RAIL(floor(*self->cfg[1]), 0, 11);
int chord = 0;
for (i=0; i < 10 ; ++i) {
if ((*self->cfg[i+2]) != 0) chord |= 1<<i;
}
const uint8_t chn = buffer[0] & 0x0f;
uint8_t mst = buffer[0] & 0xf0;
if (midi_is_panic(buffer, size)) {
filter_midichord_panic(self, chn, tme);
}
if (size != 3
|| !(mst == MIDI_NOTEON || mst == MIDI_NOTEOFF || mst == MIDI_POLYKEYPRESSURE)
|| !(floor(*self->cfg[0]) == 0 || chs == chn)
)
{
forge_midimessage(self, tme, buffer, size);
return;
}
const uint8_t key = buffer[1] & 0x7f;
const uint8_t vel = buffer[2] & 0x7f;
const int tonika = (key + 12 - scale) % 12;
if (! filter_midichord_isonscale(tonika)) {
chord = 1;
}
switch (mst) {
case MIDI_NOTEON:
self->memCI[chn][key] = chord;
self->memCM[chn][key] = vel;
for (i=0; i < 10 ; ++i) {
if (!(chord & (1<<i))) continue;
filter_midichord_noteon(self, tme, chn, key + filter_midichord_halftoneoffset(tonika, i), vel);
}
break;
case MIDI_NOTEOFF:
chord = self->memCI[chn][key];
for (i=0; i < 10 ; ++i) {
if (!(chord & (1<<i))) continue;
filter_midichord_noteoff(self, tme, chn, key + filter_midichord_halftoneoffset(tonika, i), vel);
}
self->memCI[chn][key] = -1000;
self->memCM[chn][key] = 0;
break;
case MIDI_POLYKEYPRESSURE:
for (i=0; i < 10 ; ++i) {
uint8_t buf[3];
if (!(chord & (1<<i))) continue;
int note = key + filter_midichord_halftoneoffset(tonika, i);
if (midi_valid(note)) {
buf[0] = buffer[0];
buf[1] = note;
buf[2] = buffer[2];
forge_midimessage(self, tme, buf, size);
}
}
break;
}
}
void
filter_midi_sostenuto(MidiFilter* self,
const uint32_t tme,
const uint8_t* const buffer,
const uint32_t size)
{
const uint8_t chs = midi_limit_chn(floorf(*self->cfg[0]) -1);
const uint32_t delay = floor(self->samplerate * RAIL((*self->cfg[1]), 0, 120));
const int pedal = RAIL(*self->cfg[2], 0, 2);
int state;
const uint8_t chn = buffer[0] & 0x0f;
const uint8_t vel = buffer[2] & 0x7f;
uint8_t mst = buffer[0] & 0xf0;
/* pedal CC 64 -- TODO make CC (and theshold) configurable !? */
if (size == 3 && mst == MIDI_CONTROLCHANGE && (buffer[1]) == 64) {
self->memI[16 + chn] = vel > 63 ? 1 : 0;
}
if (size != 3
|| !(mst == MIDI_NOTEON || mst == MIDI_NOTEOFF)
|| !(floorf(*self->cfg[0]) == 0 || chs == chn)
)
{
forge_midimessage(self, tme, buffer, size);
return;
}
switch(pedal) {
default:
case 0: state = 0; break;
case 1: state = 1; break;
case 2: state = self->memI[16 + chn]; break;
}
if (mst == MIDI_NOTEON && vel ==0 ) {
mst = MIDI_NOTEOFF;
}
if (size == 3 && mst == MIDI_NOTEON && state == 1) {
const uint8_t chn = buffer[0] & 0x0f;
const uint8_t key = buffer[1] & 0x7f;
if (sostenuto_check_dup(self, chn, key, -1)) {
/* note was already on,
* send note off + immediate note on, again
*/
uint8_t buf[3];
buf[0] = MIDI_NOTEOFF | chn;
buf[1] = key;
buf[2] = 0;
forge_midimessage(self, tme, buf, size);
}
forge_midimessage(self, tme, buffer, size);
}
else if (size == 3 && mst == MIDI_NOTEOFF && state == 1) {
const uint8_t chn = buffer[0] & 0x0f;
const uint8_t key = buffer[1] & 0x7f;
if (!sostenuto_check_dup(self, chn, key, tme + delay)) {
// queue note-off if not already queued
MidiEventQueue *qm = &(self->memQ[self->memI[2]]);
memcpy(qm->buf, buffer, size);
qm->size = size;
qm->reltime = tme + delay;
self->memI[2] = (self->memI[2] + 1) % self->memI[0];
}
}
else {
forge_midimessage(self, tme, buffer, size);
}
/* only note-off are queued in the buffer.
* Interleave delay-buffer with messages sent in-process above
* to retain sequential order.
*/
self->memI[3] = tme + 1;
filter_postproc_sostenuto(self);
self->memI[3] = -1;
}
static void
filter_postproc_ntabdelay(MidiFilter* self)
{
int i,c,k;
const int max_delay = self->memI[0];
const int roff = self->memI[1];
const int woff = self->memI[2];
const uint32_t n_samples = self->n_samples;
int skipped = 0;
float bpm = MAX(*self->cfg[2], 1.0);
if (*self->cfg[1] && (self->available_info & NFO_BPM)) {
bpm = self->bpm;
}
if (bpm <= 0) bpm = 60;
const float grid = RAIL((*self->cfg[3]), 1/256.0, 4.0);
const double samples_per_beat = 60.0 / bpm * self->samplerate;
/* add note-on/off for held notes..
* TODO: use a preallocated stack-like structure
*/
if (*self->cfg[4] == 0) for (c=0; c < 16; ++c) for (k=0; k < 127; ++k) {
if (self->memCM[c][k] == 0) continue;
if (self->memCI[c][k] >= n_samples) {
self->memCI[c][k] -= n_samples;
continue;
}
while (1) {
self->memCM[c][k] = RAIL(rint(self->memCM[c][k] + (*self->cfg[5])), 1, 127);
/* enqueue note-off + note-on */
MidiEventQueue *qm = &(self->memQ[self->memI[2]]);
qm->buf[0] = MIDI_NOTEOFF | c;
qm->buf[1] = k;
qm->buf[2] = 0;
qm->size = 3;
qm->reltime = self->memCI[c][k];
self->memI[2] = (self->memI[2] + 1) % self->memI[0];
if ((self->memI[2] + 1) % self->memI[0] == self->memI[1]) {
self->memCI[c][k] += ceil(grid * samples_per_beat);
break;
}
qm = &(self->memQ[self->memI[2]]);
qm->buf[0] = MIDI_NOTEON | c;
qm->buf[1] = k;
qm->buf[2] = self->memCM[c][k];
qm->size = 3;
qm->reltime = self->memCI[c][k];
self->memI[2] = (self->memI[2] + 1) % self->memI[0];
if ((self->memI[2] + 1) % self->memI[0] == self->memI[1]) {
self->memCI[c][k] += ceil(grid * samples_per_beat);
break;
}
self->memCI[c][k] += ceil(grid * samples_per_beat);
if (self->memCI[c][k] >= n_samples) {
break;
}
}
self->memCI[c][k] -= n_samples;
}
/* dequeue delayline */
for (i=0; i < max_delay; ++i) {
const int off = (i + roff) % max_delay;
if (self->memQ[off].size > 0) {
if (self->memQ[off].reltime < n_samples) {
if (self->memQ[off].size == 3 && (self->memQ[off].buf[0] & 0xf0) == MIDI_NOTEON) {
const uint8_t chn = self->memQ[off].buf[0] & 0x0f;
const uint8_t key = self->memQ[off].buf[1] & 0x7f;
self->memCS[chn][key]++;
if (self->memCS[chn][key] > 1) { // send a note-off first
uint8_t buf[3];
buf[0] = MIDI_NOTEOFF | chn;
buf[1] = key; buf[2] = 0;
forge_midimessage(self, self->memQ[off].reltime, buf, 3);
}
forge_midimessage(self, self->memQ[off].reltime, self->memQ[off].buf, self->memQ[off].size);
}
else if (self->memQ[off].size == 3 && (self->memQ[off].buf[0] & 0xf0) == MIDI_NOTEOFF) {
const uint8_t chn = self->memQ[off].buf[0] & 0x0f;
const uint8_t key = self->memQ[off].buf[1] & 0x7f;
if (self->memCS[chn][key] > 0) {
self->memCS[chn][key]--;
if (self->memCS[chn][key] == 0) {
forge_midimessage(self, self->memQ[off].reltime, self->memQ[off].buf, self->memQ[off].size);
}
}
} else {
forge_midimessage(self, self->memQ[off].reltime, self->memQ[off].buf, self->memQ[off].size);
}
self->memQ[off].size = 0;
if (!skipped) self->memI[1] = (self->memI[1] + 1) % max_delay;
} else {
self->memQ[off].reltime -= n_samples;
skipped = 1;
}
} else if (!skipped) self->memI[1] = off;
if (off == woff) break;
}
}
