80486DX2-66/86Box-fork
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Attempt to fix the AdLib Gold DMA when no data is available while sampling and reverted the timer_on_auto to timer_advance_u64 to make the PCM wave sound correctly.

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TC1995
2023-10-20 20:57:53 +02:00
parent 00edd8cfbc
commit 9c847949f6
1 changed files with 32 additions and 10 deletions
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42
src/sound/snd_adlibgold.c
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@@ -182,18 +182,18 @@ adgold_update_irq_status(adgold_t *adgold)
adgold->adgold_irq_status = adgold->adgold_status ^ 0xf;
}
void
int
adgold_getsamp_dma(adgold_t *adgold, int channel)
{
int temp;
dma_set_drq(adgold->dma, 1);
if ((adgold->adgold_mma_regs[channel][0xc] & 0x60) && (((adgold->adgold_mma_fifo_end[channel] - adgold->adgold_mma_fifo_start[channel]) & 255) >= 127))
return;
return 2;
temp = dma_channel_read(adgold->dma);
if (temp == DMA_NODATA) {
return;
return 1;
}
adgold->adgold_mma_fifo[channel][adgold->adgold_mma_fifo_end[channel]] = temp;
adgold->adgold_mma_fifo_end[channel] = (adgold->adgold_mma_fifo_end[channel] + 1) & 255;
@@ -207,6 +207,8 @@ adgold_getsamp_dma(adgold_t *adgold, int channel)
adgold_update_irq_status(adgold);
dma_set_drq(adgold->dma, 0);
}
return 0;
}
void
@@ -377,8 +379,16 @@ adgold_write(uint16_t addr, uint8_t val, void *priv)
adgold->adgold_mma.voice_count[1] = adgold->adgold_mma.voice_latch[1];
while (((adgold->adgold_mma_fifo_end[0] - adgold->adgold_mma_fifo_start[0]) & 255) < 128) {
adgold_getsamp_dma(adgold, 0);
adgold_getsamp_dma(adgold, 1);
if (adgold_getsamp_dma(adgold, 0)) {
adgold->adgold_mma_fifo_end[0] = 0;
adgold->adgold_mma_fifo_start[0] = 0;
break;
}
if (adgold_getsamp_dma(adgold, 1)) {
adgold->adgold_mma_fifo_end[1] = 0;
adgold->adgold_mma_fifo_start[1] = 0;
break;
}
}
if (((adgold->adgold_mma_fifo_end[0] - adgold->adgold_mma_fifo_start[0]) & 255) >= adgold->adgold_mma_intpos[0]) {
adgold->adgold_mma_status &= ~0x01;
@@ -392,7 +402,11 @@ adgold_write(uint16_t addr, uint8_t val, void *priv)
}
} else {
while (((adgold->adgold_mma_fifo_end[0] - adgold->adgold_mma_fifo_start[0]) & 255) < 128) {
adgold_getsamp_dma(adgold, 0);
if (adgold_getsamp_dma(adgold, 0)) {
adgold->adgold_mma_fifo_end[0] = 0;
adgold->adgold_mma_fifo_start[0] = 0;
break;
}
}
if (((adgold->adgold_mma_fifo_end[0] - adgold->adgold_mma_fifo_start[0]) & 255) >= adgold->adgold_mma_intpos[0]) {
adgold->adgold_mma_status &= ~0x01;
@@ -502,7 +516,11 @@ adgold_write(uint16_t addr, uint8_t val, void *priv)
if (adgold->adgold_mma_regs[1][0xc] & 1) {
while (((adgold->adgold_mma_fifo_end[1] - adgold->adgold_mma_fifo_start[1]) & 255) < 128) {
adgold_getsamp_dma(adgold, 1);
if (adgold_getsamp_dma(adgold, 1)) {
adgold->adgold_mma_fifo_end[1] = 0;
adgold->adgold_mma_fifo_start[1] = 0;
break;
}
}
}
}
@@ -675,10 +693,14 @@ adgold_mma_poll(adgold_t *adgold, int channel)
}
if (adgold->adgold_mma_regs[channel][0xc] & 1) {
adgold_getsamp_dma(adgold, channel);
if (adgold_getsamp_dma(adgold, channel)) {
adgold->adgold_mma_fifo_end[channel] = 0;
adgold->adgold_mma_fifo_start[channel] = 0;
return;
}
}
if (((adgold->adgold_mma_fifo_end[channel] - adgold->adgold_mma_fifo_start[channel]) & 255) < adgold->adgold_mma_intpos[channel] && !(adgold->adgold_mma_status & 0x01)) {
adgold->adgold_mma_status |= 1 << channel;
adgold->adgold_mma_status |= (1 << channel);
adgold_update_irq_status(adgold);
}
}
@@ -693,7 +715,7 @@ adgold_timer_poll(void *priv)
adgold_t *adgold = (adgold_t *) priv;
/*A small timer period will result in hangs.*/
timer_on_auto(&adgold->adgold_mma_timer_count, 4.88964);
timer_advance_u64(&adgold->adgold_mma_timer_count, (uint64_t) ((double) TIMER_USEC * 1.88964));
if (adgold->adgold_midi_ctrl & 0x3f) {
if ((adgold->adgold_midi_ctrl & 0x3f) != 0x3f) {