From ccc39358b0fa2a64970ceb4450c32806155fd26c Mon Sep 17 00:00:00 2001 From: notaz Date: Fri, 16 Jun 2023 02:06:04 +0300 Subject: [PATCH] sound: fix ym2612 forgetting lfo state when dac is on for less bad audio in OD2 --- pico/sound/ym2612.c | 14 ++++++++------ 1 file changed, 8 insertions(+), 6 deletions(-) diff --git a/pico/sound/ym2612.c b/pico/sound/ym2612.c index 39958f59..6d47850c 100644 --- a/pico/sound/ym2612.c +++ b/pico/sound/ym2612.c @@ -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 -- 2.39.5