ref: bc99f48aca15efd07cb81853172b95e83076314f
dir: /LEAF/Src/leaf-midi.c/
/*==============================================================================
leaf-midi.c
Created: 30 Nov 2018 11:29:16am
Author: airship
==============================================================================*/
#if _WIN32 || _WIN64
#include "..\Inc\leaf-midi.h"
#else
#include "../Inc/leaf-midi.h"
#endif
// POLY
void tPoly_init(tPoly* const polyh, int maxNumVoices)
{
_tPoly* poly = *polyh = (_tPoly*) leaf_alloc(sizeof(_tPoly));
poly->numVoices = maxNumVoices;
poly->maxNumVoices = maxNumVoices;
poly->lastVoiceToChange = 0;
// Arp mode stuff
poly->currentVoice = 0;
poly->maxLength = 128;
poly->currentNote = -1;
//default learned CCs and notes are just the CCs 1-128 - notes are skipped
for (int i = 0; i < 128; i++)
{
poly->notes[i][0] = 0;
poly->notes[i][1] = -1;
}
poly->glideTime = 5.0f;
poly->ramps = (tRamp*) leaf_alloc(sizeof(tRamp) * poly->maxNumVoices);
poly->rampVals = (float*) leaf_alloc(sizeof(float) * poly->maxNumVoices);
poly->firstReceived = (oBool*) leaf_alloc(sizeof(oBool) * poly->maxNumVoices);
poly->voices = (int**) leaf_alloc(sizeof(int*) * poly->maxNumVoices);
for (int i = 0; i < poly->maxNumVoices; ++i)
{
poly->voices[i] = (int*) leaf_alloc(sizeof(int) * 2);
poly->voices[i][0] = -1;
poly->firstReceived[i] = OFALSE;
tRamp_init(&poly->ramps[i], poly->glideTime, 1);
}
poly->pitchBend = 0.0f;
tRamp_init(&poly->pitchBendRamp, 1.0f, 1);
tStack_init(&poly->stack);
tStack_init(&poly->orderStack);
poly->pitchGlideIsActive = OFALSE;
}
void tPoly_free(tPoly* const polyh)
{
_tPoly* poly = *polyh;
for (int i = 0; i < poly->maxNumVoices; i++)
{
tRamp_free(&poly->ramps[i]);
leaf_free(poly->voices[i]);
}
tRamp_free(&poly->pitchBendRamp);
tStack_free(&poly->stack);
tStack_free(&poly->orderStack);
leaf_free(poly->voices);
leaf_free(poly->ramps);
leaf_free(poly->rampVals);
leaf_free(poly->firstReceived);
leaf_free(poly);
}
void tPoly_tickPitch(tPoly* polyh)
{
tPoly_tickPitchGlide(polyh);
tPoly_tickPitchBend(polyh);
}
void tPoly_tickPitchGlide(tPoly* polyh)
{
_tPoly* poly = *polyh;
for (int i = 0; i < poly->maxNumVoices; ++i)
{
tRamp_tick(&poly->ramps[i]);
}
}
void tPoly_tickPitchBend(tPoly* polyh)
{
_tPoly* poly = *polyh;
tRamp_tick(&poly->pitchBendRamp);
}
//instead of including in dacsend, should have a separate pitch bend ramp, that is added when the ramps are ticked and sent to DAC
void tPoly_setPitchBend(tPoly* const polyh, float pitchBend)
{
_tPoly* poly = *polyh;
poly->pitchBend = pitchBend;
tRamp_setDest(&poly->pitchBendRamp, poly->pitchBend);
}
int tPoly_noteOn(tPoly* const polyh, int note, uint8_t vel)
{
_tPoly* poly = *polyh;
// if not in keymap or already on stack, dont do anything. else, add that note.
if (tStack_contains(&poly->stack, note) >= 0) return -1;
else
{
tPoly_orderedAddToStack(polyh, note);
tStack_add(&poly->stack, note);
int alteredVoice = -1;
oBool found = OFALSE;
for (int i = 0; i < poly->numVoices; i++)
{
if (poly->voices[i][0] < 0) // if inactive voice, give this note to voice
{
if (!poly->firstReceived[i] || !poly->pitchGlideIsActive)
{
tRamp_setVal(&poly->ramps[i], note);
poly->firstReceived[i] = OTRUE;
}
found = OTRUE;
poly->voices[i][0] = note;
poly->voices[i][1] = vel;
poly->lastVoiceToChange = i;
poly->notes[note][0] = vel;
poly->notes[note][1] = i;
tRamp_setDest(&poly->ramps[i], poly->voices[i][0]);
alteredVoice = i;
break;
}
}
if (!found) //steal
{
int whichVoice, whichNote;
for (int j = tStack_getSize(&poly->stack) - 1; j >= 0; j--)
{
whichNote = tStack_get(&poly->stack, j);
whichVoice = poly->notes[whichNote][1];
if (whichVoice >= 0)
{
poly->lastVoiceToChange = j;
int oldNote = poly->voices[whichVoice][0];
poly->voices[whichVoice][0] = note;
poly->voices[whichVoice][1] = vel;
poly->notes[oldNote][1] = -1; //mark the stolen voice as inactive (in the second dimension of the notes array)
poly->notes[note][0] = vel;
poly->notes[note][1] = whichVoice;
tRamp_setTime(&poly->ramps[whichVoice], poly->glideTime);
tRamp_setDest(&poly->ramps[whichVoice], poly->voices[whichVoice][0]);
alteredVoice = whichVoice;
break;
}
}
}
return alteredVoice;
}
}
int16_t noteToTest = -1;
int tPoly_noteOff(tPoly* const polyh, uint8_t note)
{
_tPoly* poly = *polyh;
tStack_remove(&poly->stack, note);
tStack_remove(&poly->orderStack, note);
poly->notes[note][0] = 0;
poly->notes[note][1] = -1;
int deactivatedVoice = -1;
for (int i = 0; i < poly->numVoices; i++)
{
if (poly->voices[i][0] == note)
{
poly->voices[i][0] = -1;
poly->voices[i][1] = 0;
poly->lastVoiceToChange = i;
deactivatedVoice = i;
break;
}
}
/*
//monophonic handling
if ((poly->numVoices == 1) && (tStack_getSize(poly->stack) > 0))
{
int oldNote = tStack_first(poly->stack);
poly->voices[0][0] = oldNote;
poly->voices[0][1] = poly->notes[oldNote][0];
poly->lastVoiceToChange = 0;
}
*/
//grab old notes off the stack if there are notes waiting to replace the free voice
if (deactivatedVoice >= 0)
{
for (int j = 0; j < tStack_getSize(&poly->stack); ++j)
{
noteToTest = tStack_get(&poly->stack, j);
if (poly->notes[noteToTest][1] < 0) //if there is a stolen note waiting (marked inactive but on the stack)
{
poly->voices[deactivatedVoice][0] = noteToTest; //set the newly free voice to use the old stolen note
tRamp_setDest(&poly->ramps[deactivatedVoice], poly->voices[deactivatedVoice][0]);
poly->voices[deactivatedVoice][1] = poly->notes[noteToTest][0]; // set the velocity of the voice to be the velocity of that note
poly->notes[noteToTest][1] = deactivatedVoice; //mark that it is no longer stolen and is now active
return -1;
}
}
}
return deactivatedVoice;
}
void tPoly_orderedAddToStack(tPoly* const polyh, uint8_t noteVal)
{
_tPoly* poly = *polyh;
uint8_t j;
int myPitch, thisPitch, nextPitch;
tStack ns = poly->orderStack;
int whereToInsert = 0;
for (j = 0; j < ns->size; j++)
{
myPitch = noteVal;
thisPitch = ns->data[j];
nextPitch = ns->data[j+1];
if (myPitch > thisPitch)
{
if ((myPitch < nextPitch) || (nextPitch == -1))
{
whereToInsert = j+1;
break;
}
}
}
//first move notes that are already in the stack one position to the right
for (j = ns->size; j > whereToInsert; j--)
{
ns->data[j] = ns->data[(j - 1)];
}
//then, insert the new note into the front of the stack
ns->data[whereToInsert] = noteVal;
ns->size++;
}
void tPoly_setNumVoices(tPoly* const polyh, uint8_t numVoices)
{
_tPoly* poly = *polyh;
poly->numVoices = (numVoices > poly->maxNumVoices) ? poly->maxNumVoices : numVoices;
}
void tPoly_setPitchGlideActive(tPoly* const polyh, oBool isActive)
{
_tPoly* poly = *polyh;
poly->pitchGlideIsActive = isActive;
}
void tPoly_setPitchGlideTime(tPoly* const polyh, float t)
{
_tPoly* poly = *polyh;
poly->glideTime = t;
for (int i = 0; i < poly->maxNumVoices; ++i)
{
tRamp_setTime(&poly->ramps[i], poly->glideTime);
}
}
int tPoly_getNumVoices(tPoly* const polyh)
{
_tPoly* poly = *polyh;
return poly->numVoices;
}
int tPoly_getNumActiveVoices(tPoly* const polyh)
{
_tPoly* poly = *polyh;
return tStack_getSize(&poly->stack);
}
float tPoly_getPitch(tPoly* const polyh, uint8_t voice)
{
_tPoly* poly = *polyh;
return tRamp_sample(&poly->ramps[voice]) + tRamp_sample(&poly->pitchBendRamp);
}
int tPoly_getKey(tPoly* const polyh, uint8_t voice)
{
_tPoly* poly = *polyh;
return poly->voices[voice][0];
}
int tPoly_getVelocity(tPoly* const polyh, uint8_t voice)
{
_tPoly* poly = *polyh;
return poly->voices[voice][1];
}
int tPoly_isOn(tPoly* const polyh, uint8_t voice)
{
_tPoly* poly = *polyh;
return (poly->voices[voice][0] > 0) ? 1 : 0;
}
//====================================================================================
/* Stack */
//====================================================================================
void tStack_init(tStack* const stack)
{
_tStack* ns = *stack = (_tStack*) leaf_alloc(sizeof(_tStack));
ns->ordered = OFALSE;
ns->size = 0;
ns->pos = 0;
ns->capacity = STACK_SIZE;
for (int i = 0; i < STACK_SIZE; i++) ns->data[i] = -1;
}
void tStack_free(tStack* const stack)
{
_tStack* ns = *stack;
leaf_free(ns);
}
// If stack contains note, returns index. Else returns -1;
int tStack_contains(tStack* const stack, uint16_t noteVal)
{
_tStack* ns = *stack;
for (int i = 0; i < ns->size; i++)
{
if (ns->data[i] == noteVal) return i;
}
return -1;
}
void tStack_add(tStack* const stack, uint16_t noteVal)
{
_tStack* ns = *stack;
uint8_t j;
int whereToInsert = 0;
if (ns->ordered)
{
for (j = 0; j < ns->size; j++)
{
if (noteVal > ns->data[j])
{
if ((noteVal < ns->data[j+1]) || (ns->data[j+1] == -1))
{
whereToInsert = j+1;
break;
}
}
}
}
//first move notes that are already in the stack one position to the right
for (j = ns->size; j > whereToInsert; j--)
{
ns->data[j] = ns->data[(j - 1)];
}
//then, insert the new note into the front of the stack
ns->data[whereToInsert] = noteVal;
ns->size++;
}
int tStack_addIfNotAlreadyThere(tStack* const stack, uint16_t noteVal)
{
_tStack* ns = *stack;
uint8_t j;
int added = 0;
if (tStack_contains(stack, noteVal) == -1)
{
int whereToInsert = 0;
if (ns->ordered)
{
for (j = 0; j < ns->size; j++)
{
if (noteVal > ns->data[j])
{
if ((noteVal < ns->data[j+1]) || (ns->data[j+1] == -1))
{
whereToInsert = j+1;
break;
}
}
}
}
//first move notes that are already in the stack one position to the right
for (j = ns->size; j > whereToInsert; j--)
{
ns->data[j] = ns->data[(j - 1)];
}
//then, insert the new note into the front of the stack
ns->data[whereToInsert] = noteVal;
ns->size++;
added = 1;
}
return added;
}
// Remove noteVal. return 1 if removed, 0 if not
int tStack_remove(tStack* const stack, uint16_t noteVal)
{
_tStack* ns = *stack;
uint8_t k;
int foundIndex = tStack_contains(stack, noteVal);
int removed = 0;
if (foundIndex >= 0)
{
for (k = 0; k < (ns->size - foundIndex); k++)
{
if ((k+foundIndex) >= (ns->capacity - 1))
{
ns->data[k + foundIndex] = -1;
}
else
{
ns->data[k + foundIndex] = ns->data[k + foundIndex + 1];
if ((k + foundIndex) == (ns->size - 1))
{
ns->data[k + foundIndex + 1] = -1;
}
}
}
// in case it got put on the stack multiple times
foundIndex--;
ns->size--;
removed = 1;
}
return removed;
}
// Doesn't change size of data types
void tStack_setCapacity(tStack* const stack, uint16_t cap)
{
_tStack* ns = *stack;
if (cap <= 0)
ns->capacity = 1;
else if (cap <= STACK_SIZE)
ns->capacity = cap;
else
ns->capacity = STACK_SIZE;
for (int i = cap; i < STACK_SIZE; i++)
{
if ((int)ns->data[i] != -1)
{
ns->data[i] = -1;
ns->size -= 1;
}
}
if (ns->pos >= cap)
{
ns->pos = 0;
}
}
int tStack_getSize(tStack* const stack)
{
_tStack* ns = *stack;
return ns->size;
}
void tStack_clear(tStack* const stack)
{
_tStack* ns = *stack;
for (int i = 0; i < STACK_SIZE; i++)
{
ns->data[i] = -1;
}
ns->pos = 0;
ns->size = 0;
}
// Next item in order of addition to stack. Return 0-31 if there is a next item to move to. Returns -1 otherwise.
int tStack_next(tStack* const stack)
{
_tStack* ns = *stack;
int step = 0;
if (ns->size != 0) // if there is at least one note in the stack
{
if (ns->pos > 0) // if you're not at the most recent note (first one), then go backward in the array (moving from earliest to latest)
{
ns->pos--;
}
else
{
ns->pos = (ns->size - 1); // if you are the most recent note, go back to the earliest note in the array
}
step = ns->data[ns->pos];
return step;
}
else
{
return -1;
}
}
int tStack_get(tStack* const stack, int which)
{
_tStack* ns = *stack;
return ns->data[which];
}
int tStack_first(tStack* const stack)
{
_tStack* ns = *stack;
return ns->data[0];
}