RaySollium99/picodrive
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bugfixes, new scaling, double ym upd at 940

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git-svn-id: file:///home/notaz/opt/svn/PicoDrive@83 be3aeb3a-fb24-0410-a615-afba39da0efa
This commit is contained in:
notaz 2007-03-31 13:57:45 +00:00
parent 3d48f1437f
commit 2433f40912
22 changed files with 360 additions and 171 deletions
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75
platform/gp2x/code940/940.c
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@ -55,6 +55,56 @@ static void mp3_decode(void)
set_if_not_changed(&shared_ctl->mp3_offs, mp3_offs, readPtr - mp3_data);
}
static void ym_update(int *ym_buffer)
{
int i, dw;
int two_upds = 0;
UINT16 *wbuff;
if (shared_ctl->writebuffsel == 1) {
wbuff = shared_ctl->writebuff1;
} else {
wbuff = shared_ctl->writebuff0;
}
/* playback all writes */
for (i = 2048/2; i > 0; i--) {
UINT16 d;
dw = *(int *)wbuff;
d = dw;
wbuff++;
if (d == 0xffff) break;
if (d == 0xfffe) { two_upds=1; break; }
YM2612Write_(d >> 8, d);
d = (dw>>16);
wbuff++;
if (d == 0xffff) break;
if (d == 0xfffe) { two_upds=1; break; }
YM2612Write_(d >> 8, d);
}
if (two_upds) {
int len1 = shared_ctl->length / 2;
shared_ctl->ym_active_chs =
YM2612UpdateOne_(ym_buffer, len1, shared_ctl->stereo, 1);
for (i *= 2; i > 0; i--) {
UINT16 d = *wbuff++;
if (d == 0xffff) break;
YM2612Write_(d >> 8, d);
}
ym_buffer += shared_ctl->stereo ? len1*2 : len1;
len1 = shared_ctl->length - len1;
shared_ctl->ym_active_chs =
YM2612UpdateOne_(ym_buffer, len1, shared_ctl->stereo, 1);
} else {
shared_ctl->ym_active_chs =
YM2612UpdateOne_(ym_buffer, shared_ctl->length, shared_ctl->stereo, 1);
}
}
void Main940(void)
{
@ -92,30 +142,9 @@ void Main940(void)
YM2612PicoStateLoad_();
break;
case JOB940_YM2612UPDATEONE: {
int i, dw, *wbuff;
if (shared_ctl->writebuffsel == 1) {
wbuff = (int *) shared_ctl->writebuff1;
} else {
wbuff = (int *) shared_ctl->writebuff0;
}
/* playback all writes */
for (i = 2048/2; i > 0; i--) {
UINT16 d;
dw = *wbuff++;
d = dw;
if (d == 0xffff) break;
YM2612Write_(d >> 8, d);
d = (dw>>16);
if (d == 0xffff) break;
YM2612Write_(d >> 8, d);
}
shared_ctl->ym_active_chs =
YM2612UpdateOne_(ym_buffer, shared_ctl->length, shared_ctl->stereo, 1);
case JOB940_YM2612UPDATEONE:
ym_update(ym_buffer);
break;
}
case JOB940_MP3DECODE:
mp3_decode();