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Formatting

This commit is contained in:
neauoire 2023-10-20 11:54:25 -04:00
parent c4ec4a6340
commit 87d6798593
3 changed files with 242 additions and 229 deletions
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83
src/devices/audio.c
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@ -55,6 +55,8 @@ typedef struct AudioChannel {
AudioChannel channel[POLYPHONY]; AudioChannel channel[POLYPHONY];
/* clang-format off */
const float tuning[109] = { const float tuning[109] = {
0.00058853f, 0.00062352f, 0.00066060f, 0.00069988f, 0.00074150f, 0.00058853f, 0.00062352f, 0.00066060f, 0.00069988f, 0.00074150f,
0.00078559f, 0.00083230f, 0.00088179f, 0.00093423f, 0.00098978f, 0.00078559f, 0.00083230f, 0.00088179f, 0.00093423f, 0.00098978f,
@ -80,34 +82,38 @@ const float tuning[109] = {
0.25338348f, 0.26845044f, 0.28441334f, 0.30132544f, 0.25338348f, 0.26845044f, 0.28441334f, 0.30132544f,
}; };
/* clang-format on */
void void
env_on(Envelope *env) { env_on(Envelope *env)
{
env->stage = ENV_ATTACK; env->stage = ENV_ATTACK;
env->vol = 0.0f; env->vol = 0.0f;
if (env->a > 0) { if(env->a > 0) {
env->a = (SOUND_TIMER / AUDIO_BUFSIZE) / env->a; env->a = (SOUND_TIMER / AUDIO_BUFSIZE) / env->a;
} else if (env->stage == ENV_ATTACK) { } else if(env->stage == ENV_ATTACK) {
env->stage = ENV_DECAY; env->stage = ENV_DECAY;
env->vol = 1.0f; env->vol = 1.0f;
} }
if (env->d < 10.0f) { if(env->d < 10.0f) {
env->d = 10.0f; env->d = 10.0f;
} }
env->d = (SOUND_TIMER / AUDIO_BUFSIZE) / env->d; env->d = (SOUND_TIMER / AUDIO_BUFSIZE) / env->d;
if (env->r < 10.0f) { if(env->r < 10.0f) {
env->r = 10.0f; env->r = 10.0f;
} }
env->r = (SOUND_TIMER / AUDIO_BUFSIZE) / env->r; env->r = (SOUND_TIMER / AUDIO_BUFSIZE) / env->r;
} }
void void
env_off(Envelope *env) { env_off(Envelope *env)
{
env->stage = ENV_RELEASE; env->stage = ENV_RELEASE;
} }
void void
note_on(AudioChannel *channel, Uint16 duration, Uint8 *data, Uint16 len, Uint8 vol, note_on(AudioChannel *channel, Uint16 duration, Uint8 *data, Uint16 len, Uint8 vol, Uint8 attack, Uint8 decay, Uint8 sustain, Uint8 release, Uint8 pitch, bool loop)
Uint8 attack, Uint8 decay, Uint8 sustain, Uint8 release, Uint8 pitch, bool loop) { {
channel->duration = duration > 0 ? duration : len / 44.1f; channel->duration = duration > 0 ? duration : len / 44.1f;
channel->vol_l = (vol >> 4) / 15.0f; channel->vol_l = (vol >> 4) / 15.0f;
channel->vol_r = (vol & 0xf) / 15.0f; channel->vol_r = (vol & 0xf) / 15.0f;
@ -120,45 +126,47 @@ note_on(AudioChannel *channel, Uint16 duration, Uint8 *data, Uint16 len, Uint8 v
sample.env.d = decay * 64.0f; sample.env.d = decay * 64.0f;
sample.env.s = sustain / 16.0f; sample.env.s = sustain / 16.0f;
sample.env.r = release * 64.0f; sample.env.r = release * 64.0f;
if (loop) { if(loop) {
sample.loop = len; sample.loop = len;
} else { } else {
sample.loop = 0; sample.loop = 0;
} }
env_on(&sample.env); env_on(&sample.env);
if (pitch < 20) { if(pitch < 20) {
pitch = 20; pitch = 20;
} }
float sample_rate = 44100 / 261.60; float sample_rate = 44100 / 261.60;
if (len <= 256) { if(len <= 256) {
sample_rate = len; sample_rate = len;
} }
const float *inc = &tuning[pitch - 20]; const float *inc = &tuning[pitch - 20];
sample.inc = *(inc) * sample_rate; sample.inc = *(inc)*sample_rate;
channel->next_sample = sample; channel->next_sample = sample;
channel->xfade = true; channel->xfade = true;
} }
void void
note_off(AudioChannel *channel, Uint16 duration) { note_off(AudioChannel *channel, Uint16 duration)
{
channel->duration = duration; channel->duration = duration;
env_off(&channel->sample.env); env_off(&channel->sample.env);
} }
void void
env_advance(Envelope *env) { env_advance(Envelope *env)
switch (env->stage) { {
switch(env->stage) {
case ENV_ATTACK: { case ENV_ATTACK: {
env->vol += env->a; env->vol += env->a;
if (env->vol >= 1.0f) { if(env->vol >= 1.0f) {
env->stage = ENV_DECAY; env->stage = ENV_DECAY;
env->vol = 1.0f; env->vol = 1.0f;
} }
} break; } break;
case ENV_DECAY: { case ENV_DECAY: {
env->vol -= env->d; env->vol -= env->d;
if (env->vol <= env->s || env->d <= 0) { if(env->vol <= env->s || env->d <= 0) {
env->stage = ENV_SUSTAIN; env->stage = ENV_SUSTAIN;
env->vol = env->s; env->vol = env->s;
} }
@ -167,7 +175,7 @@ env_advance(Envelope *env) {
env->vol = env->s; env->vol = env->s;
} break; } break;
case ENV_RELEASE: { case ENV_RELEASE: {
if (env->vol <= 0 || env->r <= 0) { if(env->vol <= 0 || env->r <= 0) {
env->vol = 0; env->vol = 0;
} else { } else {
env->vol -= env->r; env->vol -= env->r;
@ -177,7 +185,8 @@ env_advance(Envelope *env) {
} }
float float
interpolate_sample(Uint8 *data, Uint16 len, float pos) { interpolate_sample(Uint8 *data, Uint16 len, float pos)
{
#if INTERPOL_METHOD == 0 #if INTERPOL_METHOD == 0
return data[(int)pos]; return data[(int)pos];
@ -211,13 +220,14 @@ interpolate_sample(Uint8 *data, Uint16 len, float pos) {
} }
Sint16 Sint16
next_sample(Sample *sample) { next_sample(Sample *sample)
if (sample->pos >= sample->len) { {
if (sample->loop == 0) { if(sample->pos >= sample->len) {
if(sample->loop == 0) {
sample->data = 0; sample->data = 0;
return 0; return 0;
} }
while (sample->pos >= sample->len) { while(sample->pos >= sample->len) {
sample->pos -= sample->loop; sample->pos -= sample->loop;
} }
} }
@ -232,29 +242,30 @@ next_sample(Sample *sample) {
} }
void void
audio_handler(void *ctx, Uint8 *out_stream, int len) { audio_handler(void *ctx, Uint8 *out_stream, int len)
{
Sint16 *stream = (Sint16 *)out_stream; Sint16 *stream = (Sint16 *)out_stream;
memset(stream, 0x00, len); memset(stream, 0x00, len);
int n; int n;
for (n = 0; n < POLYPHONY; n++) { for(n = 0; n < POLYPHONY; n++) {
Uint8 device = (3 + n) << 4; Uint8 device = (3 + n) << 4;
Uxn *u = (Uxn *)ctx; Uxn *u = (Uxn *)ctx;
Uint8 *addr = &u->dev[device]; Uint8 *addr = &u->dev[device];
if (channel[n].duration <= 0 && PEEK2(addr)) { if(channel[n].duration <= 0 && PEEK2(addr)) {
uxn_eval(u, PEEK2(addr)); uxn_eval(u, PEEK2(addr));
} }
channel[n].duration -= SOUND_TIMER; channel[n].duration -= SOUND_TIMER;
int x = 0; int x = 0;
if (channel[n].xfade) { if(channel[n].xfade) {
float delta = 1.0f / (XFADE_SAMPLES * 2); float delta = 1.0f / (XFADE_SAMPLES * 2);
while (x < XFADE_SAMPLES * 2) { while(x < XFADE_SAMPLES * 2) {
float alpha = x * delta; float alpha = x * delta;
float beta = 1.0f - alpha; float beta = 1.0f - alpha;
Sint16 next_a = next_sample(&channel[n].next_sample); Sint16 next_a = next_sample(&channel[n].next_sample);
Sint16 next_b = 0; Sint16 next_b = 0;
if (channel[n].sample.data != 0) { if(channel[n].sample.data != 0) {
next_b = next_sample(&channel[n].sample); next_b = next_sample(&channel[n].sample);
} }
Sint16 next = alpha * next_a + beta * next_b; Sint16 next = alpha * next_a + beta * next_b;
@ -265,8 +276,8 @@ audio_handler(void *ctx, Uint8 *out_stream, int len) {
channel[n].xfade = false; channel[n].xfade = false;
} }
Sample *sample = &channel[n].sample; Sample *sample = &channel[n].sample;
while (x < len / 2) { while(x < len / 2) {
if (sample->data == 0) { if(sample->data == 0) {
break; break;
} }
Sint16 next = next_sample(sample); Sint16 next = next_sample(sample);
@ -275,7 +286,7 @@ audio_handler(void *ctx, Uint8 *out_stream, int len) {
} }
} }
int i; int i;
for (i = 0; i < len / 2; i++) { for(i = 0; i < len / 2; i++) {
stream[i] <<= 6; stream[i] <<= 6;
} }
} }
@ -286,7 +297,7 @@ audio_start(int idx, Uint8 *d, Uxn *u)
Uint16 duration = PEEK2(d + 0x5); Uint16 duration = PEEK2(d + 0x5);
Uint8 off = d[0xf] == 0x00; Uint8 off = d[0xf] == 0x00;
if (!off) { if(!off) {
Uint16 addr = PEEK2(d + 0xc); Uint16 addr = PEEK2(d + 0xc);
Uint8 *data = &u->ram[addr]; Uint8 *data = &u->ram[addr];
Uint16 len = PEEK2(d + 0xa); Uint16 len = PEEK2(d + 0xa);
@ -305,11 +316,13 @@ audio_start(int idx, Uint8 *d, Uxn *u)
} }
Uint8 Uint8
audio_get_vu(int instance) { audio_get_vu(int instance)
{
return channel[instance].sample.env.vol * 255.0f; return channel[instance].sample.env.vol * 255.0f;
} }
Uint16 Uint16
audio_get_position(int instance) { audio_get_position(int instance)
{
return channel[instance].sample.pos; return channel[instance].sample.pos;
} }