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sound: fix ym2612 forgetting lfo state when dac is on

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for less bad audio in OD2
This commit is contained in:
notaz 2023-06-16 02:06:04 +03:00 • committed by irixxxx
parent 8013663ec2
commit ccc39358b0
1 changed files with 8 additions and 6 deletions
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14
pico/sound/ym2612.c
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@ -892,7 +892,8 @@ typedef struct
UINT16 vol_out2;
UINT16 vol_out3;
UINT16 vol_out4;
UINT32 pad[2];
UINT32 lfo_init_sft16;
UINT32 pad;
UINT32 phase1; /* 10 */
UINT32 phase2;
UINT32 phase3;
@ -1225,18 +1226,18 @@ static chan_rend_context crct;
static void chan_render_prep(void)
{
crct.eg_timer_add = ym2612.OPN.eg_timer_add;
crct.lfo_init_sft16 = g_lfo_ampm << 16;
crct.lfo_inc = ym2612.OPN.lfo_inc;
}
static void chan_render_finish(s32 *buffer, unsigned short length, int active_chans)
static void chan_render_finish(s32 *buffer, int length, int active_chans)
{
ym2612.OPN.eg_cnt = crct.eg_cnt;
ym2612.OPN.eg_timer = crct.eg_timer;
g_lfo_ampm = crct.pack >> 16; // need_save
ym2612.OPN.lfo_cnt = crct.lfo_cnt;
ym2612.OPN.lfo_cnt += ym2612.OPN.lfo_inc * length;
}
static UINT32 update_lfo_phase(FM_SLOT *SLOT, UINT32 block_fnum)
static UINT32 update_lfo_phase(const FM_SLOT *SLOT, UINT32 block_fnum)
{
UINT32 fnum_lfo;
INT32 lfo_fn_table_index_offset;
@ -1273,7 +1274,7 @@ static int chan_render(s32 *buffer, int length, int c, UINT32 flags) // flags: s
if (crct.lfo_inc) {
flags |= 8;
flags |= g_lfo_ampm << 16;
flags |= crct.lfo_init_sft16;
flags |= crct.CH->AMmasks << 8;
if (crct.CH->ams == 8) // no ams
flags &= ~0xf00;
@ -1809,6 +1810,7 @@ int YM2612UpdateOne_(s32 *buffer, int length, int stereo, int is_buf_empty)
if (ym2612.slot_mask & 0x00f000) active_chs |= chan_render(buffer, length, 3, flags|((pan&0x0c0)>>2)) << 3;
BIT_IF(flags, 1, (ym2612.ssg_mask & 0x0f0000) && (ym2612.OPN.ST.flags & 1));
if (ym2612.slot_mask & 0x0f0000) active_chs |= chan_render(buffer, length, 4, flags|((pan&0x300)>>4)) << 4;
g_lfo_ampm = crct.pack >> 16; // need_save; now because ch5 might skip updating it
BIT_IF(flags, 1, (ym2612.ssg_mask & 0xf00000) && (ym2612.OPN.ST.flags & 1));
if (ym2612.slot_mask & 0xf00000) active_chs |= chan_render(buffer, length, 5, flags|((pan&0xc00)>>6)|(!!ym2612.dacen<<2)) << 5;
#undef BIT_IF