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adsr: Add debugging

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This commit is contained in:
Stuart Longland 2017-04-08 20:55:18 +10:00
parent 30e11101c4
commit c7accf26d9
Signed by: stuartl
GPG Key ID: F954BBBB7948D546
1 changed files with 44 additions and 0 deletions
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44
adsr.c
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@ -18,6 +18,7 @@
* MA 02110-1301 USA
*/
#include "debug.h"
#include "adsr.h"
#include <stdlib.h>
#ifdef __AVR_ARCH__
@ -61,6 +62,8 @@ uint8_t adsr_next(struct adsr_env_gen_t* const adsr) {
if (adsr->next_event) {
/* Still waiting for next event */
adsr->next_event--;
_DPRINTF("adsr=%p amp=%d next_in=%d\n",
adsr, adsr->amplitude, adsr->next_event);
return adsr->amplitude;
}
@ -70,6 +73,21 @@ uint8_t adsr_next(struct adsr_env_gen_t* const adsr) {
*/
if (adsr->state == ADSR_STATE_IDLE) {
_DPRINTF("adsr=%p IDLE time_scale=%d "
"delay_time=%d "
"attack_time=%d "
"decay_time=%d "
"release_time=%d "
"peak_amp=%d "
"sustain_amp=%d\n",
adsr, adsr->time_scale,
adsr->delay_time,
adsr->attack_time,
adsr->decay_time,
adsr->release_time,
adsr->peak_amp,
adsr->sustain_amp);
/* Are registers set up? */
if (!adsr->time_scale)
return 0;
@ -87,6 +105,8 @@ uint8_t adsr_next(struct adsr_env_gen_t* const adsr) {
}
if (adsr->state == ADSR_STATE_DELAY_INIT) {
_DPRINTF("adsr=%p DELAY INIT\n", adsr);
/* Setting up a delay */
adsr->amplitude = 0;
adsr->next_event = adsr->time_scale
@ -97,6 +117,8 @@ uint8_t adsr_next(struct adsr_env_gen_t* const adsr) {
}
if (adsr->state == ADSR_STATE_DELAY_EXPIRE) {
_DPRINTF("adsr=%p DELAY EXPIRE\n", adsr);
/* Delay has expired */
if (adsr->attack_time)
adsr->state = ADSR_STATE_ATTACK_INIT;
@ -105,6 +127,8 @@ uint8_t adsr_next(struct adsr_env_gen_t* const adsr) {
}
if (adsr->state == ADSR_STATE_ATTACK_INIT) {
_DPRINTF("adsr=%p ATTACK INIT\n", adsr);
/* Attack is divided into 16 segments */
adsr->time_step = (uint16_t)((adsr->attack_time
* adsr->time_scale) >> 4);
@ -114,6 +138,8 @@ uint8_t adsr_next(struct adsr_env_gen_t* const adsr) {
}
if (adsr->state == ADSR_STATE_ATTACK) {
_DPRINTF("adsr=%p ATTACK\n", adsr);
if (adsr->counter) {
/* Change of amplitude */
uint16_t lin_amp = (16-adsr->counter)
@ -132,6 +158,8 @@ uint8_t adsr_next(struct adsr_env_gen_t* const adsr) {
}
if (adsr->state == ADSR_STATE_ATTACK_EXPIRE) {
_DPRINTF("adsr=%p ATTACK EXPIRE\n", adsr);
if (adsr->decay_time)
adsr->state = ADSR_STATE_DECAY_INIT;
else
@ -139,6 +167,8 @@ uint8_t adsr_next(struct adsr_env_gen_t* const adsr) {
}
if (adsr->state == ADSR_STATE_DECAY_INIT) {
_DPRINTF("adsr=%p DECAY INIT\n", adsr);
/* We should be at full amplitude */
adsr->amplitude = adsr->peak_amp;
@ -150,6 +180,8 @@ uint8_t adsr_next(struct adsr_env_gen_t* const adsr) {
}
if (adsr->state == ADSR_STATE_DECAY) {
_DPRINTF("adsr=%p DECAY\n", adsr);
if (adsr->counter) {
/* Linear decrease in amplitude */
uint16_t delta = adsr->peak_amp
@ -166,6 +198,8 @@ uint8_t adsr_next(struct adsr_env_gen_t* const adsr) {
}
if (adsr->state == ADSR_STATE_DECAY_EXPIRE) {
_DPRINTF("adsr=%p DECAY EXPIRE\n", adsr);
if (adsr->sustain_time)
adsr->state = ADSR_STATE_SUSTAIN_INIT;
else
@ -173,6 +207,8 @@ uint8_t adsr_next(struct adsr_env_gen_t* const adsr) {
}
if (adsr->state == ADSR_STATE_SUSTAIN_INIT) {
_DPRINTF("adsr=%p SUSTAIN INIT\n", adsr);
adsr->amplitude = adsr->sustain_amp;
adsr->next_event = adsr->time_scale
* adsr->sustain_time;
@ -182,6 +218,8 @@ uint8_t adsr_next(struct adsr_env_gen_t* const adsr) {
}
if (adsr->state == ADSR_STATE_SUSTAIN_EXPIRE) {
_DPRINTF("adsr=%p SUSTAIN EXPIRE\n", adsr);
if (adsr->release_time)
adsr->state = ADSR_STATE_RELEASE_INIT;
else
@ -189,6 +227,8 @@ uint8_t adsr_next(struct adsr_env_gen_t* const adsr) {
}
if (adsr->state == ADSR_STATE_RELEASE_INIT) {
_DPRINTF("adsr=%p RELEASE INIT\n", adsr);
adsr->time_step = (uint16_t)((adsr->release_time
* adsr->time_scale) >> 4);
adsr->counter = 16;
@ -197,6 +237,8 @@ uint8_t adsr_next(struct adsr_env_gen_t* const adsr) {
}
if (adsr->state == ADSR_STATE_RELEASE) {
_DPRINTF("adsr=%p RELEASE\n", adsr);
if (adsr->counter) {
/* Change of amplitude */
uint16_t lin_amp = adsr->counter
@ -214,6 +256,8 @@ uint8_t adsr_next(struct adsr_env_gen_t* const adsr) {
}
if (adsr->state == ADSR_STATE_RELEASE_EXPIRE) {
_DPRINTF("adsr=%p RELEASE EXPIRE\n", adsr);
/* Reset the state */
adsr->state = ADSR_STATE_IDLE;
adsr->amplitude = 0;