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passing audio test 4

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This commit is contained in:
Samuel Walker 2025-02-05 15:49:53 -07:00
parent 76dbf7984f
commit d576bbca55
Signed by: piwalker
GPG Key ID: BE1F84BF85111255
2 changed files with 90 additions and 38 deletions
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3
include/audio.h
View File

@ -20,6 +20,9 @@ typedef struct {
bool ch4_dac;
bool ch1_len_fz;
bool ch2_len_fz;
bool ch3_len_fz;
bool ch4_len_fz;
u8 volume_left;
u8 volume_right;

125
lib/audio.c
View File

@ -182,8 +182,8 @@ static int audio_callback(const void* input_uffer, void *output_buffer,
if(dacs) {
left_out = left - left_cap;
right_out = right - right_cap;
left_cap = left - left_out * 0.996;
right_cap = right - right_out * 0.996;
left_cap = left - left_out * 0.996f;
right_cap = right - right_out * 0.996f;
}
*out++ = left_out;
@ -278,7 +278,7 @@ void sq1_sweep() {
step = ctx.sq1_sweep_direction ? -step : step;
ctx.sq1_calc_period = ctx.sq1_sweep_period + step;
//overflow check
if(ctx.sq1_calc_period > 0x7FFF) {
if(ctx.sq1_calc_period > 0x7FF) {
ctx.sq1_enable = false;
}
}
@ -304,6 +304,7 @@ void audio_tick(){
if(ctx.sq2_len >= 64) {
ctx.sq2_len = 0;
ctx.sq2_enable = false;
ctx.ch2_len_fz = true;
}
}
@ -311,6 +312,7 @@ void audio_tick(){
ctx.ch3_len++;
if(ctx.ch3_len == 0) {
ctx.ch3_enable = false;
ctx.ch3_len_fz = true;
}
}
@ -319,11 +321,12 @@ void audio_tick(){
if(ctx.ch4_len >= 64) {
ctx.ch4_len = 0;
ctx.ch4_enable = false;
ctx.ch4_len_fz = true;
}
}
}
if((prev_ticks & (1 << 3)) && !(ticks & (1 << 3))) {
if((prev_ticks & (1 << 2)) && !(ticks & (1 << 2))) {
if(ctx.sq1_env_pace != 0){
ctx.sq1_env_timer++;
if(ctx.sq1_env_timer >= ctx.sq1_env_pace) {
@ -370,20 +373,20 @@ void audio_tick(){
}
if((prev_ticks & (1 << 2)) && !(ticks & (1 << 2))) {
if((prev_ticks & (1 << 1)) && !(ticks & (1 << 1))) {
ctx.sq1_sweep_timer++;
if(ctx.sq1_sweep_timer >= ctx.sq1_sweep_pace) {
ctx.sq1_sweep_timer = 0;
if(ctx.sq1_enable && ctx.sq1_sweep_pace){
if(ctx.sq1_enable && ctx.sq1_sweep_pace > 0 && ctx.sq1_sweep_enabled){
sq1_sweep();
if(ctx.sq1_calc_period <= 0x7FFF && ctx.sq1_sweep_step != 0) {
if(ctx.sq1_calc_period <= 0x7FF && ctx.sq1_sweep_step != 0) {
ctx.sq1_sweep_period = ctx.sq1_calc_period;
ctx.sq1_period_reset = ctx.sq1_calc_period;
}
sq1_sweep();
}
}
}
}
}
void enable_square1() {
@ -396,8 +399,8 @@ void enable_square1() {
ctx.sq1_sweep_timer = 0;
ctx.sq1_env_direction = ctx.sq1_env_direction_buffer;
ctx.sq1_env_pace = ctx.sq1_env_pace_buffer;
ctx.sq1_sweep_enabled = (ctx.sq1_sweep_pace || ctx.sq1_sweep_step);
if(ctx.sq1_sweep_step) {
ctx.sq1_sweep_enabled = ((ctx.sq1_sweep_pace != 0) || (ctx.sq1_sweep_step != 0));
if(ctx.sq1_sweep_step != 0) {
sq1_sweep();
}
}
@ -407,9 +410,6 @@ void enable_square2() {
return;
}
ctx.sq2_enable = true;
if(ctx.sq2_len >= 64) {
ctx.sq2_len = 0;
}
ctx.sq2_volume = ctx.sq2_initial_volume;
ctx.sq2_env_timer = 0;
ctx.sq2_sample = 0;
@ -423,13 +423,9 @@ void enable_wave() {
return;
}
ctx.ch3_enable = true;
if(ctx.ch3_len == 255) {
ctx.ch3_len = 0;
}
ctx.ch3_sample = 0;
ctx.ch3_volume = ctx.ch3_initial_volume;
ctx.ch3_period_timer = ctx.ch3_period_reset;
printf("channel 3 enabled\n");
}
void enable_noise() {
@ -437,9 +433,6 @@ void enable_noise() {
return;
}
ctx.ch4_enable = true;
if(ctx.ch4_len >= 64) {
ctx.ch4_len = 0;
}
ctx.ch4_env_timer = 0;
ctx.ch4_env_direction = ctx.ch4_env_direction_buffer;
ctx.ch4_env_pace = ctx.ch4_env_pace_buffer;
@ -454,7 +447,7 @@ u8 audio_read(u16 address) {
return value | 0b01110000;
}
if(address == 0xFF25) {
u8 value;
u8 value = 0x0;
value |= ctx.ch4_left << 7;
value |= ctx.ch3_left << 6;
value |= ctx.ch2_left << 5;
@ -464,6 +457,7 @@ u8 audio_read(u16 address) {
value |= ctx.ch3_right << 2;
value |= ctx.ch2_right << 1;
value |= ctx.ch1_right;
//printf("read at %02X; Value: %02X\n", address, value);
return value;
}
@ -568,14 +562,14 @@ void reset_buffers(){
ctx.ch1_dac = 0;
ctx.ch2_dac = 0;
ctx.ch3_dac = 0;
ctx.ch1_left = 0;
ctx.ch1_right = 0;
ctx.ch2_left = 0;
ctx.ch2_right = 0;
ctx.ch3_left = 0;
ctx.ch3_right = 0;
ctx.ch4_left = 0;
ctx.ch4_right = 0;
ctx.ch1_left = false;
ctx.ch1_right = false;
ctx.ch2_left = false;
ctx.ch2_right = false;
ctx.ch3_left = false;
ctx.ch3_right = false;
ctx.ch4_left = false;
ctx.ch4_right = false;
ctx.volume_left = 0;
ctx.volume_right = 0;
ctx.vin_left = 0;
@ -651,8 +645,9 @@ void audio_write(u16 address, u8 value){
}
if(address == 0xFF26) {
ctx.audio_enabled = value & 0x80;
ctx.audio_enabled = (value & 0x80) == 0x80;
if(!ctx.audio_enabled) {
//printf("audio disabled\n");
reset_buffers();
}
}
@ -671,6 +666,7 @@ void audio_write(u16 address, u8 value){
ctx.ch3_right = value & 0b00000100;
ctx.ch2_right = value & 0b00000010;
ctx.ch1_right = value & 0b00000001;
//printf("write at %02X; Value: %02X\n", address, value);
}
if(address == 0xFF24) {
@ -691,8 +687,7 @@ void audio_write(u16 address, u8 value){
ctx.sq1_duty = value >> 6;
ctx.sq1_initial_len = value & 0x3F;
ctx.sq1_len = ctx.sq1_initial_len;
static bool unfreeze;
unfreeze = true;
ctx.ch1_len_fz = false;
//printf("initial len: %02X\n", ctx.sq1_initial_len);
}
if(address == 0xFF12) {
@ -729,7 +724,6 @@ void audio_write(u16 address, u8 value){
ctx.sq1_len++;
}
}
printf("Value: %02X\n", value);
ctx.sq1_len_enable = len_en;
if(value & 0x80) {
enable_square1();
@ -741,6 +735,7 @@ void audio_write(u16 address, u8 value){
ctx.sq2_duty = value >> 6;
ctx.sq2_initial_len = value & 0x3F;
ctx.sq2_len = ctx.sq2_initial_len;
ctx.ch2_len_fz = false;
}
if(address == 0xFF17) {
ctx.sq2_initial_volume = (value >> 4) & 0x0F;
@ -759,9 +754,27 @@ void audio_write(u16 address, u8 value){
//printf("period: %03X, old_period: %03X\n", ctx.sq2_period_reset, prev_period);
}
if(address == 0xFF19) {
if(ctx.sq2_len == 64) {
ctx.sq2_len = 0;
}
ctx.sq2_period_reset = (ctx.sq2_period_reset & 0x0FF) | ((value & 0b111) << 8);
ctx.sq2_len_enable = (value & 0x40) == 0x40;
if((value & 0x80) == 0x80) {
bool len_en = (value & 0x40) == 0x40;
if((ticks % 2) == 0 && !ctx.ch2_len_fz && !ctx.sq2_len_enable && len_en){
ctx.sq2_len++;
if(ctx.sq2_len >= 64) {
ctx.sq2_len = 0;
ctx.sq2_enable = false;
ctx.ch2_len_fz = true;
}
}
if((ticks % 2) == 0 && ctx.ch2_len_fz && (value & 0x80) == 0x80){
ctx.ch2_len_fz = false;
if(len_en){
ctx.sq2_len++;
}
}
ctx.sq2_len_enable = len_en;
if(value & 0x80) {
enable_square2();
}
}
@ -776,6 +789,7 @@ void audio_write(u16 address, u8 value){
if(address == 0xFF1B) {
ctx.ch3_initial_len = value;
ctx.ch3_len = ctx.ch3_initial_len;
ctx.ch3_len_fz = false;
}
if(address == 0xFF1C) {
@ -788,7 +802,23 @@ void audio_write(u16 address, u8 value){
if(address == 0xFF1E) {
ctx.ch3_period_reset = (ctx.ch3_period_reset & 0x0FF) | ((value & 0b111) << 8);
ctx.ch3_len_enable = (value & 0x40) == 0x40;
bool len_en = (value & 0x40) == 0x40;
if((ticks % 2) == 0 && !ctx.ch3_len_fz && !ctx.ch3_len_enable && len_en){
if(ctx.ch3_len >= 255) {
ctx.ch3_len = 0;
ctx.ch3_enable = false;
ctx.ch3_len_fz = true;
} else {
ctx.ch3_len++;
}
}
if((ticks % 2) == 0 && ctx.ch3_len_fz && (value & 0x80) == 0x80){
ctx.ch3_len_fz = false;
if(len_en){
ctx.ch3_len++;
}
}
ctx.ch3_len_enable = len_en;
if(value & 0x80) {
enable_wave();
}
@ -797,6 +827,7 @@ void audio_write(u16 address, u8 value){
if(address == 0xFF20) {
ctx.ch4_initial_len = value & 0b111111;
ctx.ch4_len = ctx.ch4_initial_len;
ctx.ch4_len_fz = false;
}
if(address == 0xFF21) {
@ -821,8 +852,26 @@ void audio_write(u16 address, u8 value){
}
if(address == 0xFF23) {
ctx.ch4_len_enable = (value & 0x40) == 0x40;
if((value & 0x80) == 0x80) {
if(ctx.ch4_len == 64) {
ctx.ch4_len = 0;
}
bool len_en = (value & 0x40) == 0x40;
if((ticks % 2) == 0 && !ctx.ch4_len_fz && !ctx.ch4_len_enable && len_en){
ctx.ch4_len++;
if(ctx.ch4_len >= 64) {
ctx.ch4_len = 0;
ctx.ch4_enable = false;
ctx.ch4_len_fz = true;
}
}
if((ticks % 2) == 0 && ctx.ch4_len_fz && (value & 0x80) == 0x80){
ctx.ch4_len_fz = false;
if(len_en){
ctx.ch4_len++;
}
}
ctx.ch4_len_enable = len_en;
if(value & 0x80) {
enable_noise();
}
}