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version 1.4, 2003/10/25 17:29:38
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version 1.5, 2003/10/26 08:59:53
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| #include "compiler.h" |
#include "compiler.h" |
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#include "parts.h" |
| #include "sound.h" |
#include "sound.h" |
| #include "psggen.h" |
#include "psggen.h" |
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| extern PSGGENCFG psggencfg; |
extern PSGGENCFG psggencfg; |
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| // ¥Æ¥¹¥È |
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| static UINT32 rnds; |
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| static UINT psg_rand(void) { |
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| UINT32 rand0; |
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| UINT32 rand1; |
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| UINT c; |
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| rand0 = rnds & 0xffff; |
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| rand1 = rnds >> 16; |
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| rand0 = (rand0 >> 5) + (rand0 << 11); |
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| rand0 += 60043; |
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| rand1 -= 4953 + ((rand0 >> 16) & 1); |
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| c = (rand1 >> 15) & 1; |
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| rand1 = (rand1 << 1) + c; |
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| rand0 += rand1 + c; |
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| rnds = (rand1 << 16) + (rand0 & 0xffff); |
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| return(rand0); |
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| } |
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| void SOUNDCALL psggen_getpcm(PSGGEN psg, SINT32 *pcm, UINT count) { |
void SOUNDCALL psggen_getpcm(PSGGEN psg, SINT32 *pcm, UINT count) { |
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Line 80 void SOUNDCALL psggen_getpcm(PSGGEN psg,
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Line 60 void SOUNDCALL psggen_getpcm(PSGGEN psg,
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| psg->noise.count -= psg->noise.freq; |
psg->noise.count -= psg->noise.freq; |
| if (psg->noise.count > countbak) { |
if (psg->noise.count > countbak) { |
| // psg->noise.base = GETRAND() & (1 << (1 << PSGADDEDBIT)); |
// psg->noise.base = GETRAND() & (1 << (1 << PSGADDEDBIT)); |
| psg->noise.base = psg_rand() & (1 << (1 << PSGADDEDBIT)); |
psg->noise.base = rand_get() & (1 << (1 << PSGADDEDBIT)); |
| } |
} |
| noisetbl += psg->noise.base; |
noisetbl += psg->noise.base; |
| noisetbl >>= 1; |
noisetbl >>= 1; |
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