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sm64pc/src/audio/effects.c

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#include <ultra64.h>
#include <macros.h>
#include "effects.h"
#include "load.h"
#include "data.h"
#include "seqplayer.h"
#ifdef VERSION_JP
#define US_FLOAT2(x) x##.0
#else
#define US_FLOAT2(x) x
#endif
#ifdef VERSION_EU
static void sequence_channel_process_sound(struct SequenceChannel *seqChannel, s32 recalculateVolume) {
f32 channelVolume;
s32 i;
if (seqChannel->changes.as_bitfields.volume || recalculateVolume) {
channelVolume = seqChannel->volume * seqChannel->volumeScale * seqChannel->seqPlayer->appliedFadeVolume;
if (seqChannel->seqPlayer->muted && (seqChannel->muteBehavior & MUTE_BEHAVIOR_SOFTEN) != 0) {
channelVolume = seqChannel->seqPlayer->muteVolumeScale * channelVolume;
}
seqChannel->appliedVolume = channelVolume;
}
if (seqChannel->changes.as_bitfields.pan) {
seqChannel->pan = seqChannel->newPan * seqChannel->panChannelWeight;
}
for (i = 0; i < 4; ++i) {
struct SequenceChannelLayer *layer = seqChannel->layers[i];
if (layer != NULL && layer->enabled && layer->note != NULL) {
if (layer->notePropertiesNeedInit) {
layer->noteFreqScale = layer->freqScale * seqChannel->freqScale;
layer->noteVelocity = layer->velocitySquare * seqChannel->appliedVolume;
layer->notePan = (seqChannel->pan + layer->pan * (0x80 - seqChannel->panChannelWeight)) >> 7;
layer->notePropertiesNeedInit = FALSE;
} else {
if (seqChannel->changes.as_bitfields.freqScale) {
layer->noteFreqScale = layer->freqScale * seqChannel->freqScale;
}
if (seqChannel->changes.as_bitfields.volume || recalculateVolume) {
layer->noteVelocity = layer->velocitySquare * seqChannel->appliedVolume;
}
if (seqChannel->changes.as_bitfields.pan) {
layer->notePan = (seqChannel->pan + layer->pan * (0x80 - seqChannel->panChannelWeight)) >> 7;
}
}
}
}
seqChannel->changes.as_u8 = 0;
}
#else
static void sequence_channel_process_sound(struct SequenceChannel *seqChannel) {
f32 channelVolume;
f32 panLayerWeight;
f32 panFromChannel;
s32 i;
channelVolume = seqChannel->volume * seqChannel->volumeScale * seqChannel->seqPlayer->fadeVolume;
if (seqChannel->seqPlayer->muted && (seqChannel->muteBehavior & MUTE_BEHAVIOR_SOFTEN) != 0) {
channelVolume *= seqChannel->seqPlayer->muteVolumeScale;
}
panFromChannel = seqChannel->pan * seqChannel->panChannelWeight;
panLayerWeight = US_FLOAT(1.0) - seqChannel->panChannelWeight;
for (i = 0; i < 4; i++) {
struct SequenceChannelLayer *layer = seqChannel->layers[i];
if (layer != NULL && layer->enabled && layer->note != NULL) {
layer->noteFreqScale = layer->freqScale * seqChannel->freqScale;
layer->noteVelocity = layer->velocitySquare * channelVolume;
layer->notePan = (layer->pan * panLayerWeight) + panFromChannel;
}
}
}
#endif
void sequence_player_process_sound(struct SequencePlayer *seqPlayer) {
s32 i;
if (seqPlayer->fadeTimer != 0) {
seqPlayer->fadeVolume += seqPlayer->fadeVelocity;
#ifdef VERSION_EU
seqPlayer->recalculateVolume = TRUE;
#endif
if (seqPlayer->fadeVolume > US_FLOAT2(1)) {
seqPlayer->fadeVolume = US_FLOAT2(1);
}
if (seqPlayer->fadeVolume < 0) {
seqPlayer->fadeVolume = 0;
}
if (--seqPlayer->fadeTimer == 0) {
#ifdef VERSION_EU
if (seqPlayer->state == 2) {
sequence_player_disable(seqPlayer);
return;
}
#else
switch (seqPlayer->state) {
case SEQUENCE_PLAYER_STATE_FADE_OUT:
sequence_player_disable(seqPlayer);
return;
case SEQUENCE_PLAYER_STATE_2:
case SEQUENCE_PLAYER_STATE_3:
seqPlayer->state = SEQUENCE_PLAYER_STATE_0;
break;
case SEQUENCE_PLAYER_STATE_4:
break;
}
#endif
}
}
#ifdef VERSION_EU
if (seqPlayer->recalculateVolume) {
seqPlayer->appliedFadeVolume = seqPlayer->fadeVolume * seqPlayer->fadeVolumeScale;
}
#endif
// Process channels
for (i = 0; i < CHANNELS_MAX; i++) {
if (IS_SEQUENCE_CHANNEL_VALID(seqPlayer->channels[i]) == TRUE
&& seqPlayer->channels[i]->enabled == TRUE) {
#ifdef VERSION_EU
sequence_channel_process_sound(seqPlayer->channels[i], seqPlayer->recalculateVolume);
#else
sequence_channel_process_sound(seqPlayer->channels[i]);
#endif
}
}
#ifdef VERSION_EU
seqPlayer->recalculateVolume = FALSE;
#endif
}
f32 get_portamento_freq_scale(struct Portamento *p) {
u32 v0;
f32 result;
#ifndef VERSION_EU
if (p->mode == 0) {
return 1.0f;
}
#endif
p->cur += p->speed;
v0 = (u32) p->cur;
#ifdef VERSION_EU
if (v0 > 127)
#else
if (v0 >= 127)
#endif
{
v0 = 127;
}
#ifdef VERSION_EU
result = US_FLOAT(1.0) + p->extent * (gPitchBendFrequencyScale[v0 + 128] - US_FLOAT(1.0));
#else
result = US_FLOAT(1.0) + p->extent * (gPitchBendFrequencyScale[v0 + 127] - US_FLOAT(1.0));
#endif
return result;
}
#ifdef VERSION_EU
s16 get_vibrato_pitch_change(struct VibratoState *vib) {
s32 index;
vib->time += (s32) vib->rate;
index = (vib->time >> 10) & 0x3F;
return vib->curve[index] >> 8;
}
#else
s8 get_vibrato_pitch_change(struct VibratoState *vib) {
s32 index;
vib->time += vib->rate;
index = (vib->time >> 10) & 0x3F;
switch (index & 0x30) {
case 0x10:
index = 31 - index;
case 0x00:
return vib->curve[index];
case 0x20:
index -= 0x20;
break;
case 0x30:
index = 63 - index;
break;
}
return -vib->curve[index];
}
#endif
f32 get_vibrato_freq_scale(struct VibratoState *vib) {
s32 pitchChange;
f32 extent;
f32 result;
if (vib->delay != 0) {
vib->delay--;
return 1;
}
if (vib->extentChangeTimer) {
if (vib->extentChangeTimer == 1) {
vib->extent = (s32) vib->seqChannel->vibratoExtentTarget;
} else {
vib->extent +=
((s32) vib->seqChannel->vibratoExtentTarget - vib->extent) / (s32) vib->extentChangeTimer;
}
vib->extentChangeTimer--;
} else if (vib->seqChannel->vibratoExtentTarget != (s32) vib->extent) {
if ((vib->extentChangeTimer = vib->seqChannel->vibratoExtentChangeDelay) == 0) {
vib->extent = (s32) vib->seqChannel->vibratoExtentTarget;
}
}
if (vib->rateChangeTimer) {
if (vib->rateChangeTimer == 1) {
vib->rate = (s32) vib->seqChannel->vibratoRateTarget;
} else {
vib->rate += ((s32) vib->seqChannel->vibratoRateTarget - vib->rate) / (s32) vib->rateChangeTimer;
}
vib->rateChangeTimer--;
} else if (vib->seqChannel->vibratoRateTarget != (s32) vib->rate) {
if ((vib->rateChangeTimer = vib->seqChannel->vibratoRateChangeDelay) == 0) {
vib->rate = (s32) vib->seqChannel->vibratoRateTarget;
}
}
if (vib->extent == 0) {
return 1.0f;
}
pitchChange = get_vibrato_pitch_change(vib);
extent = (f32) vib->extent / US_FLOAT(4096.0);
#ifdef VERSION_EU
result = US_FLOAT(1.0) + extent * (gPitchBendFrequencyScale[pitchChange + 128] - US_FLOAT(1.0));
#else
result = US_FLOAT(1.0) + extent * (gPitchBendFrequencyScale[pitchChange + 127] - US_FLOAT(1.0));
#endif
return result;
}
void note_vibrato_update(struct Note *note) {
#ifdef VERSION_EU
if (note->portamento.mode != 0) {
note->portamentoFreqScale = get_portamento_freq_scale(&note->portamento);
}
if (note->vibratoState.active && note->parentLayer != NO_LAYER) {
note->vibratoFreqScale = get_vibrato_freq_scale(&note->vibratoState);
}
#else
if (note->vibratoState.active) {
note->portamentoFreqScale = get_portamento_freq_scale(&note->portamento);
if (note->parentLayer != NO_LAYER) {
note->vibratoFreqScale = get_vibrato_freq_scale(&note->vibratoState);
}
}
#endif
}
void note_vibrato_init(struct Note *note) {
struct VibratoState *vib;
UNUSED struct SequenceChannel *seqChannel;
#ifdef VERSION_EU
struct NotePlaybackState *seqPlayerState = (struct NotePlaybackState *) &note->priority;
#endif
note->vibratoFreqScale = 1.0f;
note->portamentoFreqScale = 1.0f;
vib = &note->vibratoState;
#ifndef VERSION_EU
if (note->parentLayer->seqChannel->vibratoExtentStart == 0
&& note->parentLayer->seqChannel->vibratoExtentTarget == 0
&& note->parentLayer->portamento.mode == 0) {
vib->active = FALSE;
return;
}
#endif
vib->active = TRUE;
vib->time = 0;
#ifdef VERSION_EU
vib->curve = gWaveSamples[2];
vib->seqChannel = note->parentLayer->seqChannel;
if ((vib->extentChangeTimer = vib->seqChannel->vibratoExtentChangeDelay) == 0) {
vib->extent = FLOAT_CAST(vib->seqChannel->vibratoExtentTarget);
} else {
vib->extent = FLOAT_CAST(vib->seqChannel->vibratoExtentStart);
}
if ((vib->rateChangeTimer = vib->seqChannel->vibratoRateChangeDelay) == 0) {
vib->rate = FLOAT_CAST(vib->seqChannel->vibratoRateTarget);
} else {
vib->rate = FLOAT_CAST(vib->seqChannel->vibratoRateStart);
}
vib->delay = vib->seqChannel->vibratoDelay;
seqPlayerState->portamento = seqPlayerState->parentLayer->portamento;
#else
vib->curve = gVibratoCurve;
vib->seqChannel = note->parentLayer->seqChannel;
seqChannel = vib->seqChannel;
if ((vib->extentChangeTimer = seqChannel->vibratoExtentChangeDelay) == 0) {
vib->extent = seqChannel->vibratoExtentTarget;
} else {
vib->extent = seqChannel->vibratoExtentStart;
}
if ((vib->rateChangeTimer = seqChannel->vibratoRateChangeDelay) == 0) {
vib->rate = seqChannel->vibratoRateTarget;
} else {
vib->rate = seqChannel->vibratoRateStart;
}
vib->delay = seqChannel->vibratoDelay;
note->portamento = note->parentLayer->portamento;
#endif
}
void adsr_init(struct AdsrState *adsr, struct AdsrEnvelope *envelope, UNUSED s16 *volOut) {
adsr->action = 0;
adsr->state = ADSR_STATE_DISABLED;
#ifdef VERSION_EU
adsr->delay = 0;
adsr->envelope = envelope;
adsr->current = 0.0f;
#else
adsr->initial = 0;
adsr->delay = 0;
adsr->velocity = 0;
adsr->envelope = envelope;
adsr->volOut = volOut;
#endif
}
#ifdef VERSION_EU
f32 adsr_update(struct AdsrState *adsr) {
#else
s32 adsr_update(struct AdsrState *adsr) {
#endif
u8 action = adsr->action;
#ifdef VERSION_EU
u8 state = adsr->state;
switch (state) {
#else
switch (adsr->state) {
#endif
case ADSR_STATE_DISABLED:
return 0;
case ADSR_STATE_INITIAL: {
#ifndef VERSION_EU
adsr->current = adsr->initial;
adsr->target = adsr->initial;
#endif
if (action & ADSR_ACTION_HANG) {
adsr->state = ADSR_STATE_HANG;
break;
}
// fallthrough
}
case ADSR_STATE_START_LOOP:
adsr->envIndex = 0;
#ifndef VERSION_EU
adsr->currentHiRes = adsr->current << 0x10;
#endif
adsr->state = ADSR_STATE_LOOP;
// fallthrough
case ADSR_STATE_LOOP:
adsr->delay = BSWAP16(adsr->envelope[adsr->envIndex].delay);
switch (adsr->delay) {
case ADSR_DISABLE:
adsr->state = ADSR_STATE_DISABLED;
break;
case ADSR_HANG:
adsr->state = ADSR_STATE_HANG;
break;
case ADSR_GOTO:
adsr->envIndex = BSWAP16(adsr->envelope[adsr->envIndex].arg);
break;
case ADSR_RESTART:
adsr->state = ADSR_STATE_INITIAL;
break;
default:
#ifdef VERSION_EU
if (adsr->delay >= 4) {
adsr->delay = adsr->delay * gAudioBufferParameters.updatesPerFrame / 4;
}
adsr->target = (f32) BSWAP16(adsr->envelope[adsr->envIndex].arg) / 32767.0;
adsr->target = adsr->target * adsr->target;
adsr->velocity = (adsr->target - adsr->current) / adsr->delay;
#else
adsr->target = BSWAP16(adsr->envelope[adsr->envIndex].arg);
adsr->velocity = ((adsr->target - adsr->current) << 0x10) / adsr->delay;
#endif
adsr->state = ADSR_STATE_FADE;
adsr->envIndex++;
break;
}
if (adsr->state != ADSR_STATE_FADE) {
break;
}
// fallthrough
case ADSR_STATE_FADE:
#ifdef VERSION_EU
adsr->current += adsr->velocity;
#else
adsr->currentHiRes += adsr->velocity;
adsr->current = adsr->currentHiRes >> 0x10;
#endif
if (--adsr->delay <= 0) {
adsr->state = ADSR_STATE_LOOP;
}
// fallthrough
case ADSR_STATE_HANG:
break;
case ADSR_STATE_DECAY:
case ADSR_STATE_RELEASE: {
adsr->current -= adsr->fadeOutVel;
#ifdef VERSION_EU
if (adsr->sustain != 0.0f && state == ADSR_STATE_DECAY) {
#else
if (adsr->sustain != 0 && adsr->state == ADSR_STATE_DECAY) {
#endif
if (adsr->current < adsr->sustain) {
adsr->current = adsr->sustain;
#ifdef VERSION_EU
adsr->delay = 128;
#else
adsr->delay = adsr->sustain / 16;
#endif
adsr->state = ADSR_STATE_SUSTAIN;
}
break;
}
#ifdef VERSION_EU
if (adsr->current < 0) {
adsr->current = 0.0f;
adsr->state = ADSR_STATE_DISABLED;
}
#else
if (adsr->current < 100) {
adsr->current = 0;
adsr->state = ADSR_STATE_DISABLED;
}
#endif
break;
}
case ADSR_STATE_SUSTAIN:
adsr->delay -= 1;
if (adsr->delay == 0) {
adsr->state = ADSR_STATE_RELEASE;
}
break;
}
if ((action & ADSR_ACTION_DECAY)) {
adsr->state = ADSR_STATE_DECAY;
adsr->action = action & ~ADSR_ACTION_DECAY;
}
if ((action & ADSR_ACTION_RELEASE)) {
adsr->state = ADSR_STATE_RELEASE;
#ifdef VERSION_EU
adsr->action = action & ~ADSR_ACTION_RELEASE;
#else
adsr->action = action & ~(ADSR_ACTION_RELEASE | ADSR_ACTION_DECAY);
#endif
}
#ifdef VERSION_EU
if (adsr->current < 0.0f) {
return 0.0f;
}
if (adsr->current > 1.0f) {
return 1.0f;
}
return adsr->current;
#else
*adsr->volOut = adsr->current;
return 0;
#endif
}
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