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pace calculation works

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This commit is contained in:
Wolfgang Hottgenroth 2024-03-29 14:11:36 +01:00
parent 48b9fc7578
commit 9328e22425
3 changed files with 35 additions and 14 deletions
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2
sound-driver/melody.c
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@ -898,7 +898,7 @@ const t_tone tetris3[] = {
t_melodies tetrisTheme = {
.melodies = { { .amplitude = 3, .tones = tetris1 }, { .amplitude = 3, .tones = tetris2 }, { .amplitude = 3, .tones = tetris3 } },
.numOfMelodies = 3,
.pace = 4
.pace = 160
};
void melodyInit() {

25
sound-driver/sequencer.c
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@ -1,3 +1,5 @@
#include <stdint.h>
#include <stdbool.h>
#include <sys/param.h>
#include "sequencer.h"
#include "scheduler.h"
@ -9,8 +11,24 @@ void sequencerInit() {
}
void sequencerExec(void *handle) {
static uint16_t lengths[e_L_LengthEnd];
t_melodies *melodies = (t_melodies*) handle;
if (melodies->firstRun) {
melodies->firstRun = false;
lengths[e_L_1_4] = 60000 / melodies->pace; // duration of a 1/4 tone in ms
lengths[e_L_1_2] = lengths[e_L_1_4] << 1;
lengths[e_L_1] = lengths[e_L_1_4] << 2;
lengths[e_L_1_8] = lengths[e_L_1_4] >> 1;
lengths[e_L_1_16] = lengths[e_L_1_4] >> 2;
lengths[e_L_1_32] = lengths[e_L_1_4] >> 4;
for (uint8_t i = 0; i < e_L_LengthEnd; i++) {
lengths[i] /= SEQUENCER_PERIOD;
}
}
for (uint8_t channel = 0; channel < melodies->numOfMelodies; channel++) {
t_melody *melody = &(melodies->melodies[channel]);
@ -31,7 +49,7 @@ void sequencerExec(void *handle) {
melody->idx = 0;
}
psgPlayTone(channel, melody->tones[melody->idx].octave, melody->tones[melody->idx].note);
melody->lengthCnt = (melody->tones[melody->idx].staccato) ? (melody->tones[melody->idx].length / 2) : melody->tones[melody->idx].length;
melody->lengthCnt = (melody->tones[melody->idx].staccato) ? (lengths[melody->tones[melody->idx].length] / 2) : lengths[melody->tones[melody->idx].length];
melody->state = e_HoldTone;
}
break;
@ -48,7 +66,7 @@ void sequencerExec(void *handle) {
break;
case e_StaccatoBreak:
psgPlayTone(channel, e_O_Null, e_Pause);
melody->lengthCnt = melody->tones[melody->idx].length / 2;
melody->lengthCnt = lengths[melody->tones[melody->idx].length] / 2;
melody->state = e_HoldStaccatoBreak;
break;
case e_HoldStaccatoBreak:
@ -75,7 +93,8 @@ uint16_t sequencerPlayMelodies(t_melodies *melodies) {
melodies->melodies[i].state = e_Init;
}
melodies->sync = 0;
melodies->firstRun = true;
return schAdd(sequencerExec, (void*) melodies, 0, melodies->pace);
return schAdd(sequencerExec, (void*) melodies, 0, SEQUENCER_PERIOD);
}

22
sound-driver/sequencer.h
View File

@ -7,14 +7,15 @@
#include "psg.h"
typedef enum {
e_L_EndMark = 0,
e_L_SyncMark = 1,
e_L_1 = 320,
e_L_1_2 = 160,
e_L_1_4 = 80,
e_L_1_8 = 40,
e_L_1_16 = 20,
e_L_1_32 = 10,
e_L_1 = 0,
e_L_1_2 = 1,
e_L_1_4 = 2,
e_L_1_8 = 3,
e_L_1_16 = 4,
e_L_1_32 = 5,
e_L_LengthEnd = 6,
e_L_EndMark = 254,
e_L_SyncMark = 255,
} t_noteLength;
typedef struct {
@ -43,16 +44,17 @@ typedef struct {
const t_tone *tones;
} t_melody;
#define SEQUENCER_PERIOD 4 // ms
#define NUM_OF_CHANNELS 3
typedef struct {
uint8_t numOfMelodies;
uint8_t pace;
bool firstRun;
uint8_t pace; // quarter notes per minute
uint8_t sync;
t_melody melodies[NUM_OF_CHANNELS];
} t_melodies;
void sequencerInit();
uint16_t sequencerPlayMelody(t_melody *melody);
uint16_t sequencerPlayMelodies(t_melodies *melodies);