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Fixed direction of AudioPCI sample counters. Fixes stuttering MIDI in some games (eg Theme Hospital).

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This commit is contained in:
SarahW 2019-05-19 08:17:10 +01:00
commit 803b48ea1c
1 changed files with 8 additions and 14 deletions
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22
src/sound_audiopci.c
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@ -47,7 +47,8 @@ typedef struct es1371_t
uint32_t addr, addr_latch;
uint16_t count, size;
uint16_t samp_ct, curr_samp_ct;
uint16_t samp_ct;
int curr_samp_ct;
pc_timer_t timer;
uint64_t latch;
@ -579,8 +580,6 @@ static void es1371_outl(uint16_t port, uint32_t val, void *p)
case 0xc:
es1371->dac[0].size = val & 0xffff;
es1371->dac[0].count = val >> 16;
if (es1371->dac[0].count)
es1371->dac[0].count -= 4;
break;
case 0xd:
@ -1101,16 +1100,13 @@ static void es1371_poll(void *p)
es1371_next_sample_filtered(es1371, 0, es1371->dac[0].f_pos ? 16 : 0);
es1371->dac[0].f_pos = (es1371->dac[0].f_pos + 1) & 1;
es1371->dac[0].curr_samp_ct++;
if (es1371->dac[0].curr_samp_ct == es1371->dac[0].samp_ct)
es1371->dac[0].curr_samp_ct--;
if (es1371->dac[0].curr_samp_ct < 0)
{
// pclog("DAC1 IRQ\n");
es1371->int_status |= INT_STATUS_DAC1;
es1371_update_irqs(es1371);
}
if (es1371->dac[0].curr_samp_ct > es1371->dac[0].samp_ct)
{
es1371->dac[0].curr_samp_ct = 0;
es1371->dac[0].curr_samp_ct = es1371->dac[0].samp_ct;
}
}
}
@ -1134,16 +1130,14 @@ static void es1371_poll(void *p)
es1371_next_sample_filtered(es1371, 1, es1371->dac[1].f_pos ? 16 : 0);
es1371->dac[1].f_pos = (es1371->dac[1].f_pos + 1) & 1;
es1371->dac[1].curr_samp_ct++;
if (es1371->dac[1].curr_samp_ct == es1371->dac[1].samp_ct)
es1371->dac[1].curr_samp_ct--;
if (es1371->dac[1].curr_samp_ct < 0)
{
// es1371->dac[1].curr_samp_ct = 0;
// pclog("DAC2 IRQ\n");
es1371->int_status |= INT_STATUS_DAC2;
es1371_update_irqs(es1371);
es1371->dac[1].curr_samp_ct = es1371->dac[1].samp_ct;
}
if (es1371->dac[1].curr_samp_ct > es1371->dac[1].samp_ct)
es1371->dac[1].curr_samp_ct = 0;
}
}
}