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ertictac/poizone: Greatly improved (not perfect) audio [R. Belmont, Heihachi_73]

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R. Belmont 2011-05-28 15:05:03 +00:00
parent 54f3296521
commit c33ec622d3
2 changed files with 48 additions and 13 deletions
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16
src/mame/drivers/ertictac.c
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@ -241,28 +241,28 @@ static MACHINE_CONFIG_START( ertictac, ertictac_state )
MCFG_SPEAKER_STANDARD_MONO("mono")
MCFG_SOUND_ADD("dac0", DAC, 0)
MCFG_SOUND_ROUTE(0, "mono", 0.10)
MCFG_SOUND_ROUTE(0, "mono", 0.05)
MCFG_SOUND_ADD("dac1", DAC, 0)
MCFG_SOUND_ROUTE(0, "mono", 0.10)
MCFG_SOUND_ROUTE(0, "mono", 0.05)
MCFG_SOUND_ADD("dac2", DAC, 0)
MCFG_SOUND_ROUTE(0, "mono", 0.10)
MCFG_SOUND_ROUTE(0, "mono", 0.05)
MCFG_SOUND_ADD("dac3", DAC, 0)
MCFG_SOUND_ROUTE(0, "mono", 0.10)
MCFG_SOUND_ROUTE(0, "mono", 0.05)
MCFG_SOUND_ADD("dac4", DAC, 0)
MCFG_SOUND_ROUTE(0, "mono", 0.10)
MCFG_SOUND_ROUTE(0, "mono", 0.05)
MCFG_SOUND_ADD("dac5", DAC, 0)
MCFG_SOUND_ROUTE(0, "mono", 0.10)
MCFG_SOUND_ROUTE(0, "mono", 0.05)
MCFG_SOUND_ADD("dac6", DAC, 0)
MCFG_SOUND_ROUTE(0, "mono", 0.10)
MCFG_SOUND_ROUTE(0, "mono", 0.05)
MCFG_SOUND_ADD("dac7", DAC, 0)
MCFG_SOUND_ROUTE(0, "mono", 0.10)
MCFG_SOUND_ROUTE(0, "mono", 0.05)
MACHINE_CONFIG_END
ROM_START( ertictac )

45
src/mame/machine/archimds.c
View File

@ -141,16 +141,51 @@ static TIMER_CALLBACK( vidc_audio_tick )
INT16 res;
UINT8 ch;
static const char *const dac_port[8] = { "dac0", "dac1", "dac2", "dac3", "dac4", "dac5", "dac6", "dac7" };
static const INT16 mulawTable[256] =
{
-32124,-31100,-30076,-29052,-28028,-27004,-25980,-24956,
-23932,-22908,-21884,-20860,-19836,-18812,-17788,-16764,
-15996,-15484,-14972,-14460,-13948,-13436,-12924,-12412,
-11900,-11388,-10876,-10364, -9852, -9340, -8828, -8316,
-7932, -7676, -7420, -7164, -6908, -6652, -6396, -6140,
-5884, -5628, -5372, -5116, -4860, -4604, -4348, -4092,
-3900, -3772, -3644, -3516, -3388, -3260, -3132, -3004,
-2876, -2748, -2620, -2492, -2364, -2236, -2108, -1980,
-1884, -1820, -1756, -1692, -1628, -1564, -1500, -1436,
-1372, -1308, -1244, -1180, -1116, -1052, -988, -924,
-876, -844, -812, -780, -748, -716, -684, -652,
-620, -588, -556, -524, -492, -460, -428, -396,
-372, -356, -340, -324, -308, -292, -276, -260,
-244, -228, -212, -196, -180, -164, -148, -132,
-120, -112, -104, -96, -88, -80, -72, -64,
-56, -48, -40, -32, -24, -16, -8, -1,
32124, 31100, 30076, 29052, 28028, 27004, 25980, 24956,
23932, 22908, 21884, 20860, 19836, 18812, 17788, 16764,
15996, 15484, 14972, 14460, 13948, 13436, 12924, 12412,
11900, 11388, 10876, 10364, 9852, 9340, 8828, 8316,
7932, 7676, 7420, 7164, 6908, 6652, 6396, 6140,
5884, 5628, 5372, 5116, 4860, 4604, 4348, 4092,
3900, 3772, 3644, 3516, 3388, 3260, 3132, 3004,
2876, 2748, 2620, 2492, 2364, 2236, 2108, 1980,
1884, 1820, 1756, 1692, 1628, 1564, 1500, 1436,
1372, 1308, 1244, 1180, 1116, 1052, 988, 924,
876, 844, 812, 780, 748, 716, 684, 652,
620, 588, 556, 524, 492, 460, 428, 396,
372, 356, 340, 324, 308, 292, 276, 260,
244, 228, 212, 196, 180, 164, 148, 132,
120, 112, 104, 96, 88, 80, 72, 64,
56, 48, 40, 32, 24, 16, 8, 0
};
for(ch=0;ch<8;ch++)
{
ulaw_comp = (space->read_byte(vidc_sndstart+vidc_sndcur + ch));
UINT8 ulaw_temp = (space->read_byte(vidc_sndstart+vidc_sndcur + ch)) ^ 0xff;
res=1<<((ulaw_comp>>5)+4);
res+=(((ulaw_comp>>1)&0xF)<<(ulaw_comp>>5));
if (ulaw_comp&1) res=-res;
ulaw_comp = (ulaw_temp>>1) | ((ulaw_temp&1)<<7);
dac_signed_data_16_w(space->machine().device(dac_port[ch & 7]), res);
res = mulawTable[ulaw_comp];
dac_signed_data_16_w(space->machine().device(dac_port[ch & 7]), res^0x8000);
}
vidc_sndcur+=8;