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Moved OPL2 and OPL3 to a new 49716 Hz source so resampling is no longer needed, also fixed SB OPL and PC Speaker filtering (OPL was being downsampled to the selected DSP sample rate, which is incorrect, and the PC Speaker filter was using the wrong filter index in some liens).

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This commit is contained in:
OBattler
2024-03-01 06:52:48 +01:00
parent 71ecdc1b55
commit e0d80aefb4
18 changed files with 683 additions and 193 deletions
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16
src/sound/snd_sb_dsp.c
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@@ -115,7 +115,7 @@ uint8_t adjustMap2[24] = {
252, 0, 252, 0
};
double low_fir_sb16_coef[3][SB16_NCoef];
double low_fir_sb16_coef[4][SB16_NCoef];
#ifdef ENABLE_SB_DSP_LOG
int sb_dsp_do_log = ENABLE_SB_DSP_LOG;
@@ -1256,8 +1256,12 @@ sb_dsp_init(sb_dsp_t *dsp, int type, int subtype, void *parent)
/* Initialise SB16 filter to same cutoff as 8-bit SBs (3.2 kHz). This will be recalculated when
a set frequency command is sent. */
recalc_sb16_filter(0, 3200 * 2);
recalc_sb16_filter(1, FREQ_44100);
recalc_sb16_filter(2, 18939);
if (dsp->sb_has_real_opl)
recalc_sb16_filter(1, FREQ_49716);
else
recalc_sb16_filter(1, FREQ_48000);
recalc_sb16_filter(2, FREQ_44100);
recalc_sb16_filter(3, 18939);
/* Initialize SB16 8051 RAM and ASP internal RAM */
memset(dsp->sb_8051_ram, 0x00, sizeof(dsp->sb_8051_ram));
@@ -1283,6 +1287,12 @@ sb_dsp_setaddr(sb_dsp_t *dsp, uint16_t addr)
}
}
void
sb_dsp_set_real_opl(sb_dsp_t *dsp, uint8_t has_real_opl)
{
dsp->sb_has_real_opl = has_real_opl;
}
void
sb_dsp_set_stereo(sb_dsp_t *dsp, int stereo)
{