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/* Copyright (C) 2003, 2004, 2005, 2006, 2008, 2009 Dean Beeler, Jerome Fisher
* Copyright (C) 2011 Dean Beeler, Jerome Fisher, Sergey V. Mikayev
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 2.1 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "mt32emu.h"
namespace MT32Emu {
Poly::Poly(Part *usePart) {
part = usePart;
key = 255;
velocity = 255;
sustain = false;
activePartialCount = 0;
for (int i = 0; i < 4; i++) {
partials[i] = NULL;
}
state = POLY_Inactive;
}
void Poly::reset(unsigned int newKey, unsigned int newVelocity, bool newSustain, Partial **newPartials) {
if (isActive()) {
// FIXME: Throw out some big ugly debug output with a lot of exclamation marks - we should never get here
terminate();
}
key = newKey;
velocity = newVelocity;
sustain = newSustain;
activePartialCount = 0;
for (int i = 0; i < 4; i++) {
partials[i] = newPartials[i];
if (newPartials[i] != NULL) {
activePartialCount++;
state = POLY_Playing;
}
}
}
bool Poly::noteOff(bool pedalHeld) {
// Generally, non-sustaining instruments ignore note off. They die away eventually anyway.
// Key 0 (only used by special cases on rhythm part) reacts to note off even if non-sustaining or pedal held.
if (state == POLY_Inactive || state == POLY_Releasing) {
return false;
}
if (pedalHeld) {
state = POLY_Held;
} else {
startDecay();
}
return true;
}
bool Poly::stopPedalHold() {
if (state != POLY_Held) {
return false;
}
return startDecay();
}
bool Poly::startDecay() {
if (state == POLY_Inactive || state == POLY_Releasing) {
return false;
}
state = POLY_Releasing;
for (int t = 0; t < 4; t++) {
Partial *partial = partials[t];
if (partial != NULL) {
partial->startDecayAll();
}
}
return true;
}
bool Poly::startAbort() {
if (state == POLY_Inactive) {
return false;
}
for (int t = 0; t < 4; t++) {
Partial *partial = partials[t];
if (partial != NULL) {
partial->startAbort();
}
}
return true;
}
void Poly::terminate() {
if (state == POLY_Inactive) {
return;
}
for (int t = 0; t < 4; t++) {
Partial *partial = partials[t];
if (partial != NULL) {
partial->deactivate();
}
}
if (state != POLY_Inactive) {
// FIXME: Throw out lots of debug output - this should never happen
// (Deactivating the partials above should've made them each call partialDeactivated(), ultimately changing the state to POLY_Inactive)
state = POLY_Inactive;
}
}
void Poly::backupCacheToPartials(PatchCache cache[4]) {
for (int partialNum = 0; partialNum < 4; partialNum++) {
Partial *partial = partials[partialNum];
if (partial != NULL && partial->patchCache == &cache[partialNum]) {
partial->cachebackup = cache[partialNum];
partial->patchCache = &partial->cachebackup;
}
}
}
/**
* Returns the internal key identifier.
* For non-rhythm, this is within the range 12 to 108.
* For rhythm on MT-32, this is 0 or 1 (special cases) or within the range 24 to 87.
* For rhythm on devices with extended PCM sounds (e.g. CM-32L), this is 0, 1 or 24 to 108
*/
unsigned int Poly::getKey() const {
return key;
}
unsigned int Poly::getVelocity() const {
return velocity;
}
bool Poly::canSustain() const {
return sustain;
}
PolyState Poly::getState() const {
return state;
}
unsigned int Poly::getActivePartialCount() const {
return activePartialCount;
}
bool Poly::isActive() const {
return state != POLY_Inactive;
}
// This is called by Partial to inform the poly that the Partial has deactivated
void Poly::partialDeactivated(Partial *partial) {
for (int i = 0; i < 4; i++) {
if (partials[i] == partial) {
partials[i] = NULL;
activePartialCount--;
}
}
if (activePartialCount == 0) {
state = POLY_Inactive;
}
part->partialDeactivated(this);
}
}
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