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cog/Frameworks/GME/gme/qmix.c

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Updated Game_Music_Emu
2013-09-28 03:24:46 +00:00
/////////////////////////////////////////////////////////////////////////////
//
// qmix - QSound mixer
//
/////////////////////////////////////////////////////////////////////////////
#include "qmix.h"
/////////////////////////////////////////////////////////////////////////////
#define ANTICLICK_TIME (64)
#define ANTICLICK_THRESHHOLD (32)
/////////////////////////////////////////////////////////////////////////////
#define RENDERMAX (200)
/////////////////////////////////////////////////////////////////////////////
static const sint32 gauss_shuffled_reverse_table[1024] = {
366,1305, 374, 0, 362,1304, 378, 0, 358,1304, 381, 0, 354,1304, 385, 0, 351,1304, 389, 0, 347,1304, 393, 0, 343,1303, 397, 0, 339,1303, 401, 0,
336,1303, 405, 0, 332,1302, 410, 0, 328,1302, 414, 0, 325,1301, 418, 0, 321,1300, 422, 0, 318,1300, 426, 0, 314,1299, 430, 0, 311,1298, 434, 0,
307,1297, 439, 1, 304,1297, 443, 1, 300,1296, 447, 1, 297,1295, 451, 1, 293,1294, 456, 1, 290,1293, 460, 1, 286,1292, 464, 1, 283,1291, 469, 1,
280,1290, 473, 1, 276,1288, 477, 1, 273,1287, 482, 1, 270,1286, 486, 2, 267,1284, 491, 2, 263,1283, 495, 2, 260,1282, 499, 2, 257,1280, 504, 2,
254,1279, 508, 2, 251,1277, 513, 2, 248,1275, 517, 3, 245,1274, 522, 3, 242,1272, 527, 3, 239,1270, 531, 3, 236,1269, 536, 3, 233,1267, 540, 4,
230,1265, 545, 4, 227,1263, 550, 4, 224,1261, 554, 4, 221,1259, 559, 4, 218,1257, 563, 5, 215,1255, 568, 5, 212,1253, 573, 5, 210,1251, 577, 5,
207,1248, 582, 6, 204,1246, 587, 6, 201,1244, 592, 6, 199,1241, 596, 6, 196,1239, 601, 7, 193,1237, 606, 7, 191,1234, 611, 7, 188,1232, 615, 8,
186,1229, 620, 8, 183,1227, 625, 8, 180,1224, 630, 9, 178,1221, 635, 9, 175,1219, 640, 9, 173,1216, 644, 10, 171,1213, 649, 10, 168,1210, 654, 10,
166,1207, 659, 11, 163,1205, 664, 11, 161,1202, 669, 11, 159,1199, 674, 12, 156,1196, 678, 12, 154,1193, 683, 13, 152,1190, 688, 13, 150,1186, 693, 14,
147,1183, 698, 14, 145,1180, 703, 15, 143,1177, 708, 15, 141,1174, 713, 15, 139,1170, 718, 16, 137,1167, 723, 16, 134,1164, 728, 17, 132,1160, 732, 17,
130,1157, 737, 18, 128,1153, 742, 19, 126,1150, 747, 19, 124,1146, 752, 20, 122,1143, 757, 20, 120,1139, 762, 21, 118,1136, 767, 21, 117,1132, 772, 22,
115,1128, 777, 23, 113,1125, 782, 23, 111,1121, 787, 24, 109,1117, 792, 24, 107,1113, 797, 25, 106,1109, 802, 26, 104,1106, 806, 27, 102,1102, 811, 27,
100,1098, 816, 28, 99,1094, 821, 29, 97,1090, 826, 29, 95,1086, 831, 30, 94,1082, 836, 31, 92,1078, 841, 32, 90,1074, 846, 32, 89,1070, 851, 33,
87,1066, 855, 34, 86,1061, 860, 35, 84,1057, 865, 36, 83,1053, 870, 36, 81,1049, 875, 37, 80,1045, 880, 38, 78,1040, 884, 39, 77,1036, 889, 40,
76,1032, 894, 41, 74,1027, 899, 42, 73,1023, 904, 43, 71,1019, 908, 44, 70,1014, 913, 45, 69,1010, 918, 46, 67,1005, 923, 47, 66,1001, 927, 48,
65, 997, 932, 49, 64, 992, 937, 50, 62, 988, 941, 51, 61, 983, 946, 52, 60, 978, 951, 53, 59, 974, 955, 54, 58, 969, 960, 55, 56, 965, 965, 56,
55, 960, 969, 58, 54, 955, 974, 59, 53, 951, 978, 60, 52, 946, 983, 61, 51, 941, 988, 62, 50, 937, 992, 64, 49, 932, 997, 65, 48, 927,1001, 66,
47, 923,1005, 67, 46, 918,1010, 69, 45, 913,1014, 70, 44, 908,1019, 71, 43, 904,1023, 73, 42, 899,1027, 74, 41, 894,1032, 76, 40, 889,1036, 77,
39, 884,1040, 78, 38, 880,1045, 80, 37, 875,1049, 81, 36, 870,1053, 83, 36, 865,1057, 84, 35, 860,1061, 86, 34, 855,1066, 87, 33, 851,1070, 89,
32, 846,1074, 90, 32, 841,1078, 92, 31, 836,1082, 94, 30, 831,1086, 95, 29, 826,1090, 97, 29, 821,1094, 99, 28, 816,1098, 100, 27, 811,1102, 102,
27, 806,1106, 104, 26, 802,1109, 106, 25, 797,1113, 107, 24, 792,1117, 109, 24, 787,1121, 111, 23, 782,1125, 113, 23, 777,1128, 115, 22, 772,1132, 117,
21, 767,1136, 118, 21, 762,1139, 120, 20, 757,1143, 122, 20, 752,1146, 124, 19, 747,1150, 126, 19, 742,1153, 128, 18, 737,1157, 130, 17, 732,1160, 132,
17, 728,1164, 134, 16, 723,1167, 137, 16, 718,1170, 139, 15, 713,1174, 141, 15, 708,1177, 143, 15, 703,1180, 145, 14, 698,1183, 147, 14, 693,1186, 150,
13, 688,1190, 152, 13, 683,1193, 154, 12, 678,1196, 156, 12, 674,1199, 159, 11, 669,1202, 161, 11, 664,1205, 163, 11, 659,1207, 166, 10, 654,1210, 168,
10, 649,1213, 171, 10, 644,1216, 173, 9, 640,1219, 175, 9, 635,1221, 178, 9, 630,1224, 180, 8, 625,1227, 183, 8, 620,1229, 186, 8, 615,1232, 188,
7, 611,1234, 191, 7, 606,1237, 193, 7, 601,1239, 196, 6, 596,1241, 199, 6, 592,1244, 201, 6, 587,1246, 204, 6, 582,1248, 207, 5, 577,1251, 210,
5, 573,1253, 212, 5, 568,1255, 215, 5, 563,1257, 218, 4, 559,1259, 221, 4, 554,1261, 224, 4, 550,1263, 227, 4, 545,1265, 230, 4, 540,1267, 233,
3, 536,1269, 236, 3, 531,1270, 239, 3, 527,1272, 242, 3, 522,1274, 245, 3, 517,1275, 248, 2, 513,1277, 251, 2, 508,1279, 254, 2, 504,1280, 257,
2, 499,1282, 260, 2, 495,1283, 263, 2, 491,1284, 267, 2, 486,1286, 270, 1, 482,1287, 273, 1, 477,1288, 276, 1, 473,1290, 280, 1, 469,1291, 283,
1, 464,1292, 286, 1, 460,1293, 290, 1, 456,1294, 293, 1, 451,1295, 297, 1, 447,1296, 300, 1, 443,1297, 304, 1, 439,1297, 307, 0, 434,1298, 311,
0, 430,1299, 314, 0, 426,1300, 318, 0, 422,1300, 321, 0, 418,1301, 325, 0, 414,1302, 328, 0, 410,1302, 332, 0, 405,1303, 336, 0, 401,1303, 339,
0, 397,1303, 343, 0, 393,1304, 347, 0, 389,1304, 351, 0, 385,1304, 354, 0, 381,1304, 358, 0, 378,1304, 362, 0, 374,1305, 366, 0, 370,1305, 370,
};
static const sint32 pan_table[33] = {
0, 724,1024,1254,1448,1619,1774,1916,
2048,2172,2290,2401,2508,2611,2709,2804,
2896,2985,3072,3156,3238,3318,3396,3473,
3547,3620,3692,3762,3831,3899,3966,4031,
4096};
/////////////////////////////////////////////////////////////////////////////
//
// Static information
//
sint32 EMU_CALL _qmix_init(void) { return 0; }
/////////////////////////////////////////////////////////////////////////////
//
// State information
//
#define QMIXSTATE ((struct QMIX_STATE*)(state))
struct QMIX_CHAN {
uint32 on;
uint32 startbank;
uint32 startaddr;
uint32 curbank;
uint32 curaddr;
uint32 startloop;
uint32 startend;
uint32 curloop;
uint32 curend;
uint32 phase;
uint32 pitch;
uint32 vol;
uint32 pan;
sint32 current_mix_l;
sint32 current_mix_r;
sint32 sample[4];
sint32 sample_last_l;
sint32 sample_last_r;
sint32 sample_anticlick_l;
sint32 sample_anticlick_r;
sint32 sample_anticlick_remaining_l;
sint32 sample_anticlick_remaining_r;
};
/////////////////////////////////////////////////////////////////////////////
static EMU_INLINE void get_anticlicked_samples(
struct QMIX_CHAN *chan, sint32 *l, sint32 *r
) {
sint32 out, remain;
remain = chan->sample_anticlick_remaining_l;
if(remain) {
sint32 diff = chan->sample_last_l - chan->sample_anticlick_l;
if(diff < 0) { diff = -diff; }
if(diff < ANTICLICK_THRESHHOLD) {
out = chan->sample_last_l;
chan->sample_anticlick_remaining_l = 0;
} else {
out = (
chan->sample_last_l * (ANTICLICK_TIME-remain) +
chan->sample_anticlick_l * (remain)
) / ANTICLICK_TIME;
chan->sample_anticlick_remaining_l--;
}
} else {
out = chan->sample_last_l;
}
*l = out;
remain = chan->sample_anticlick_remaining_r;
if(remain) {
sint32 diff = chan->sample_last_r - chan->sample_anticlick_r;
if(diff < 0) { diff = -diff; }
if(diff < ANTICLICK_THRESHHOLD) {
out = chan->sample_last_r;
chan->sample_anticlick_remaining_r = 0;
} else {
out = (
chan->sample_last_r * (ANTICLICK_TIME-remain) +
chan->sample_anticlick_r * (remain)
) / ANTICLICK_TIME;
chan->sample_anticlick_remaining_r--;
}
} else {
out = chan->sample_last_r;
}
*r = out;
}
/////////////////////////////////////////////////////////////////////////////
static EMU_INLINE void anticlick(struct QMIX_CHAN *chan) {
sint32 l, r;
get_anticlicked_samples(chan, &l, &r);
chan->sample_anticlick_l = l;
chan->sample_anticlick_r = r;
chan->sample_anticlick_remaining_l = ANTICLICK_TIME;
chan->sample_anticlick_remaining_r = ANTICLICK_TIME;
}
/////////////////////////////////////////////////////////////////////////////
struct QMIX_STATE {
uint8 *sample_rom;
uint32 sample_rom_size;
uint32 pitchscaler;
struct QMIX_CHAN chan[16];
sint32 last_in_l;
sint32 last_in_r;
sint32 last_out_l;
sint32 last_out_r;
sint32 acc_l;
sint32 acc_r;
};
uint32 EMU_CALL _qmix_get_state_size(void) {
return sizeof(struct QMIX_STATE);
}
void EMU_CALL _qmix_clear_state(void *state) {
memset(state, 0, sizeof(struct QMIX_STATE));
}
void EMU_CALL _qmix_set_sample_rom(void *state, void *rom, uint32 size) {
QMIXSTATE->sample_rom = rom;
QMIXSTATE->sample_rom_size = size;
}
/////////////////////////////////////////////////////////////////////////////
static EMU_INLINE void chan_advance(
struct QMIX_STATE *state,
struct QMIX_CHAN *chan
) {
uint32 rom_addr = chan->curbank + chan->curaddr;
if(rom_addr >= state->sample_rom_size) rom_addr = 0;
chan->sample[0] = chan->sample[1];
chan->sample[1] = chan->sample[2];
chan->sample[2] = chan->sample[3];
chan->sample[3] = (sint32)((sint8)(state->sample_rom[rom_addr]));
chan->curaddr++;
// FIXME: MAME thinks this is >=, but is it > ?
if(chan->curaddr >= chan->curend) {
// if(!chan->curloop) {
// chan->on = 0;
// chan->curaddr--;
// } else {
chan->curaddr = chan->curend - chan->curloop;
// chan->curaddr -= 1 + chan->curloop;
// }
}
chan->curaddr &= 0xFFFF;
}
/////////////////////////////////////////////////////////////////////////////
static EMU_INLINE sint32 chan_get_resampled(
struct QMIX_STATE *state,
struct QMIX_CHAN *chan
) {
sint32 sum;
sint32 phase = chan->phase & 0xFFF;
// sum = chan->sample[2];
// sum <<= 8;
const sint32 *gauss = (sint32*)
(((sint8*)gauss_shuffled_reverse_table) + (phase & 0x0FF0));
sum = chan->sample[0] * gauss[0];
sum += chan->sample[1] * gauss[1];
sum += chan->sample[2] * gauss[2];
sum += chan->sample[3] * gauss[3];
sum /= 8;
// sum = chan->sample[1] * (0x1000-phase);
// sum += chan->sample[2] * ( phase);
// sum >>= 4;
chan->phase += chan->pitch;
while(chan->phase >= 0x1000) {
chan_advance(state, chan);
chan->phase -= 0x1000;
}
return sum;
}
static EMU_INLINE void chan_get_stereo_anticlicked(
struct QMIX_STATE *state,
struct QMIX_CHAN *chan,
sint32 *l,
sint32 *r
) {
if(!chan->on) {
chan->sample_last_l = 0;
chan->sample_last_r = 0;
} else {
sint32 out = chan_get_resampled(state, chan);
chan->sample_last_l = (out * chan->current_mix_l) / 0x8000;
chan->sample_last_r = (out * chan->current_mix_r) / 0x8000;
// if we suddenly keyed off, perform an anticlick here
if(!chan->on) { anticlick(chan); }
}
get_anticlicked_samples(chan, l, r);
}
/////////////////////////////////////////////////////////////////////////////
static void recalc_mix(struct QMIX_CHAN *chan) {
sint32 realpan = (chan->pan & 0x3F) - 0x10;
sint32 realvol = chan->vol & 0xFFFF;
if(realpan < 0x00) realpan = 0x00;
if(realpan > 0x20) realpan = 0x20;
// chan->current_mix_l = realvol << 3;
// chan->current_mix_r = realvol << 3;
// if(realpan < 0x10) {
// chan->current_mix_r *= realpan;
// chan->current_mix_r >>= 4;
// }
// if(realpan > 0x10) {
// chan->current_mix_l *= (0x20-realpan);
// chan->current_mix_l >>= 4;
// }
// chan->current_mix_l = ((0x20-realpan) * realvol) >> 1;
// chan->current_mix_r = (( realpan) * realvol) >> 1;
chan->current_mix_l = (realvol * pan_table[0x20-realpan]) / 0x2000;
chan->current_mix_r = (realvol * pan_table[ realpan]) / 0x2000;
// perform anticlick
//anticlick(chan);
}
/////////////////////////////////////////////////////////////////////////////
//
// Command handling
//
//#include <stdio.h>
void EMU_CALL _qmix_command(void *state, uint8 cmd, uint16 data) {
struct QMIX_CHAN *chan;
uint32 ch = 0;
uint32 reg = 99;
//printf("qmix command 0x%02X:0x%04X\n",cmd,data);
if(cmd < 0x80) {
reg = cmd & 7;
ch = cmd >> 3;
} else if(cmd < 0x90) {
reg = 8;
ch = cmd - 0x80;
} else if(cmd >= 0xBA && cmd < 0xCA) {
reg = 9;
ch = cmd - 0xBA;
} else {
reg = 99;
ch = 0;
}
chan = QMIXSTATE->chan + ch;
switch(reg) {
case 0: // bank
ch = (ch+1) & 0xF; chan = QMIXSTATE->chan + ch;
//printf("qmix: bank ch%X = %04X\n",ch,data);
chan->startbank = (((uint32)data) & 0x7F) << 16;
break;
case 1: // start
//printf("qmix: start ch%X = %04X\n",ch,data);
chan->startaddr = ((uint32)data) & 0xFFFF;
break;
case 2: // pitch
//printf("qmix: pitch ch%X = %04X\n",ch,data);
chan->pitch = (((uint32)(data & 0xFFFF)) * QMIXSTATE->pitchscaler) / 0x10000;
if (chan->pitch == 0) {
chan->on = 0;
anticlick(chan);
}
break;
case 3: // unknown
break;
case 4: // loop start
//printf("qmix: loop ch%X = %04X\n",ch,data);
chan->startloop = data;
break;
case 5: // end
//printf("qmix: end ch%X = %04X\n",ch,data);
chan->startend = data;
break;
case 6: // volume
//printf("qmix: vol ch%X = %04X\n",ch,data);
//printf("volume=%04X\n",data);
// if(!data) {
// chan->on = 0;
// } else {
// chan->on = 1;
// chan->address = chan->start;
// chan->phase = 0;
// }
//printf("qmix: unknown reg3 ch%X = %04X\n",ch,data);
if(data == 0) {
chan->on = 0;
anticlick(chan);
} else if (chan->on == 0) {
chan->on = 1;
chan->curbank = chan->startbank;
chan->curaddr = chan->startaddr;
chan->curloop = chan->startloop;
chan->curend = chan->startend;
chan->phase = 0;
chan->sample[0] = 0;
chan->sample[1] = 0;
chan->sample[2] = 0;
chan->sample[3] = 0;
anticlick(chan);
}
chan->vol = data;
recalc_mix(chan);
break;
case 7: // unknown
//printf("qmix: unknown reg7 ch%X = %04X\n",ch,data);
break;
case 8: // pan (0x110-0x130)
//printf("qmix: pan ch%X = %04X\n",ch,data);
//printf("pan=%04X\n",data);
chan->pan = data;
recalc_mix(chan);
break;
case 9: // ADSR?
//printf("qmix: unknown reg9 ch%X = %04X\n",ch,data);
break;
default:
//printf("qmix: unknown reg %02X = %04X\n",cmd,data);
break;
}
}
/////////////////////////////////////////////////////////////////////////////
//
// Rendering
//
static void render(
struct QMIX_STATE *state,
sint16 *buf,
uint32 samples
) {
sint32 buf_l[RENDERMAX];
sint32 buf_r[RENDERMAX];
sint32 l, r;
uint32 s;
int ch;
memset(buf_l, 0, 4 * samples);
memset(buf_r, 0, 4 * samples);
for(ch = 0; ch < 16; ch++) {
struct QMIX_CHAN *chan = state->chan + ch;
for(s = 0; s < samples; s++) {
chan_get_stereo_anticlicked(state, chan, &l, &r);
buf_l[s] += l;
buf_r[s] += r;
}
}
if(!buf) return;
for(s = 0; s < samples; s++) {
sint32 diff_l = buf_l[s] - state->last_in_l;
sint32 diff_r = buf_r[s] - state->last_in_r;
state->last_in_l = buf_l[s];
state->last_in_r = buf_r[s];
l = ((state->last_out_l * 255) / 256) + diff_l;
r = ((state->last_out_r * 255) / 256) + diff_r;
state->last_out_l = l;
state->last_out_r = r;
// l /= 2;
// r /= 2;
l *= 8;
r *= 8;
if(l > ( 32767)) l = ( 32767);
if(l < (-32768)) l = (-32768);
if(r > ( 32767)) r = ( 32767);
if(r < (-32768)) r = (-32768);
*buf++ = l;
*buf++ = r;
}
}
/////////////////////////////////////////////////////////////////////////////
void EMU_CALL _qmix_render(void *state, sint16 *buf, uint32 samples) {
//printf("qmix render %u samples\n",samples);
for(; samples >= RENDERMAX; samples -= RENDERMAX) {
render(QMIXSTATE, buf, RENDERMAX);
if(buf) buf += 2 * RENDERMAX;
}
if(samples) {
render(QMIXSTATE, buf, samples);
}
}
/////////////////////////////////////////////////////////////////////////////
void EMU_CALL _qmix_set_sample_rate(void *state, uint32 rate) {
if(rate < 1) rate = 1;
QMIXSTATE->pitchscaler = (65536 * 24000) / rate;
}
/////////////////////////////////////////////////////////////////////////////