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Minor change for experimentation. Will soon be revamping debug stuff to print a running diagram of interpolations, etc for each sample or frame. Try undefining NORMALMODE and see if it sounds more correct... no whatsnew.

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This commit is contained in:
Jonathan Gevaryahu 2010-04-26 02:02:48 +00:00
parent 764e72f5c2
commit 97ac135b0b
1 changed files with 8 additions and 6 deletions
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14
src/emu/sound/tms5220.c
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@ -365,6 +365,7 @@ void tms5220_set_variant(tms5220_state *tms, int variant)
break; break;
case TMS5220_IS_5200: case TMS5220_IS_5200:
tms->coeff = &tms5200_coeff; tms->coeff = &tms5200_coeff;
//tms->coeff = &pat4335277_coeff;
break; break;
case TMS5220_IS_5220: case TMS5220_IS_5220:
tms->coeff = &tms5220_coeff; tms->coeff = &tms5220_coeff;
@ -893,7 +894,12 @@ static void tms5220_process(tms5220_state *tms, INT16 *buffer, unsigned int size
else /*tms->pitch_count <= 50*/ else /*tms->pitch_count <= 50*/
tms->excitation_data = tms->coeff->chirptable[tms->pitch_count]<<CHIRPROM_LEFTSHIFT; tms->excitation_data = tms->coeff->chirptable[tms->pitch_count]<<CHIRPROM_LEFTSHIFT;
#else #else
tms->excitation_data = tms->pitch_count - 64; if (tms->pitch_count > 40)
tms->excitation_data = -128; // tms->coeff->chirptable[51];
else /*tms->pitch_count <= 40*/
tms->excitation_data = tms->coeff->chirptable[tms->pitch_count];
//tms->excitation_data = tms->pitch_count - 64;
#endif #endif
} }
@ -917,14 +923,10 @@ static void tms5220_process(tms5220_state *tms, INT16 *buffer, unsigned int size
size--; size--;
tms->sample_count = (tms->sample_count + 1) % 200; tms->sample_count = (tms->sample_count + 1) % 200;
#ifdef NORMALMODE
if (tms->current_pitch != 0) if (tms->current_pitch != 0)
tms->pitch_count = (tms->pitch_count + 1) % tms->current_pitch; tms->pitch_count = (tms->pitch_count + 1) % tms->current_pitch;
else else
tms->pitch_count = 51; // blank spot in the chirp rom tms->pitch_count = 51; // forced to blank spot in the chirp rom
#else
tms->pitch_count = (tms->pitch_count + 1) % 128;
#endif
tms->interp_count = (tms->interp_count + 1) % 25; tms->interp_count = (tms->interp_count + 1) % 25;
buf_count++; buf_count++;