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Fixed dmg_sound-5

This commit is contained in:
Lior Halphon 2017-09-21 18:18:10 +03:00
parent d3c15ef6ca
commit 2ca550273a
2 changed files with 24 additions and 12 deletions
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30
Core/apu.c
View File

@ -108,11 +108,11 @@ static void render(GB_gameboy_t *gb)
static uint16_t new_sweep_sample_legnth(GB_gameboy_t *gb)
{
uint16_t delta = gb->apu.square_channels[GB_SQUARE_1].sample_length >> (gb->io_registers[GB_IO_NR10] & 7);
uint16_t delta = gb->apu.shadow_sweep_sample_legnth >> (gb->io_registers[GB_IO_NR10] & 7);
if (gb->io_registers[GB_IO_NR10] & 8) {
return gb->apu.square_channels[GB_SQUARE_1].sample_length - delta;
return gb->apu.shadow_sweep_sample_legnth - delta;
}
return gb->apu.square_channels[GB_SQUARE_1].sample_length + delta;
return gb->apu.shadow_sweep_sample_legnth + delta;
}
void GB_apu_div_event(GB_gameboy_t *gb)
@ -206,12 +206,16 @@ void GB_apu_div_event(GB_gameboy_t *gb)
if (gb->apu.square_sweep_countdown) {
if (!--gb->apu.square_sweep_countdown) {
if ((gb->io_registers[GB_IO_NR10] & 0x70) && (gb->io_registers[GB_IO_NR10] & 0x07)) {
gb->apu.square_channels[GB_SQUARE_1].sample_length = gb->apu.new_sweep_sample_legnth;
gb->apu.square_channels[GB_SQUARE_1].sample_length =
gb->apu.shadow_sweep_sample_legnth =
gb->apu.new_sweep_sample_legnth;
}
if (gb->io_registers[GB_IO_NR10] & 0x70) {
/* Recalculation and overflow check only occurs after a delay */
gb->apu.square_sweep_calculate_countdown = 0x13 - gb->apu.lf_div;
}
gb->apu.square_channels[GB_SQUARE_1].sample_length &= 0x7FF;
gb->apu.square_sweep_countdown = ((gb->io_registers[GB_IO_NR10] >> 4) & 7);
if (!gb->apu.square_sweep_countdown) gb->apu.square_sweep_countdown = 8;
}
@ -241,8 +245,9 @@ void GB_apu_run(GB_gameboy_t *gb)
if (gb->apu.new_sweep_sample_legnth > 0x7ff) {
gb->apu.is_active[GB_SQUARE_1] = false;
update_sample(gb, GB_SQUARE_1, 0, gb->apu.square_sweep_calculate_countdown - cycles);
gb->apu.new_sweep_sample_legnth = gb->apu.square_channels[0].sample_length;
gb->apu.sweep_enabled = false;
}
gb->apu.sweep_decreasing |= gb->io_registers[GB_IO_NR10] & 8;
gb->apu.square_sweep_calculate_countdown = 0;
}
}
@ -475,6 +480,11 @@ void GB_apu_write(GB_gameboy_t *gb, uint8_t reg, uint8_t value)
/* Square channels */
case GB_IO_NR10:
if (gb->apu.sweep_decreasing && !(gb->io_registers[GB_IO_NR10] & 8)) {
gb->apu.is_active[GB_SQUARE_1] = false;
update_sample(gb, GB_SQUARE_1, 0, 0);
gb->apu.sweep_enabled = false;
}
break;
case GB_IO_NR11:
@ -502,9 +512,6 @@ void GB_apu_write(GB_gameboy_t *gb, uint8_t reg, uint8_t value)
unsigned index = reg == GB_IO_NR23? GB_SQUARE_2: GB_SQUARE_1;
gb->apu.square_channels[index].sample_length &= ~0xFF;
gb->apu.square_channels[index].sample_length |= value & 0xFF;
if (index == GB_SQUARE_1) {
gb->apu.new_sweep_sample_legnth = gb->apu.square_channels[0].sample_length;
}
break;
}
@ -514,7 +521,10 @@ void GB_apu_write(GB_gameboy_t *gb, uint8_t reg, uint8_t value)
gb->apu.square_channels[index].sample_length &= 0xFF;
gb->apu.square_channels[index].sample_length |= (value & 7) << 8;
if (index == GB_SQUARE_1) {
gb->apu.new_sweep_sample_legnth = gb->apu.square_channels[0].sample_length;
gb->apu.sweep_decreasing = false;
gb->apu.shadow_sweep_sample_legnth =
gb->apu.new_sweep_sample_legnth =
gb->apu.square_channels[0].sample_length;
}
if (value & 0x80) {
gb->apu.square_channels[index].current_sample_index = 7;

2
Core/apu.h
View File

@ -50,7 +50,9 @@ typedef struct
uint8_t square_sweep_countdown; // In 128Hz
uint8_t square_sweep_calculate_countdown; // In 2 MHz
uint16_t new_sweep_sample_legnth;
uint16_t shadow_sweep_sample_legnth;
bool sweep_enabled;
bool sweep_decreasing;
struct {
uint16_t pulse_length; // Reloaded from NRX1 (xorred), in 256Hz DIV ticks