+ flags = ram[start + 1];
+ if (flags & 4)
+ loop = start; // loop adress
+
+ start += 16;
+
+ if (flags & 1) // 1: stop/loop
+ start = loop;
+
+ work->ch[ch].start = start & 0x7ffff;
+ work->ch[ch].loop = loop;
+
+ return 0;
+}
+
+static void queue_channel_work(int ns_to, unsigned int silentch)
+{
+ struct work_item *work;
+ SPUCHAN *s_chan;
+ unsigned int mask;
+ int ch, d;
+
+ work = &worker->i[worker->i_ready & WORK_I_MASK];
+ work->ns_to = ns_to;
+ work->ctrl = spu.spuCtrl;
+ work->decode_pos = spu.decode_pos;
+ work->channels_silent = silentch;
+
+ mask = work->channels_new = spu.dwNewChannel & 0xffffff;
+ for (ch = 0; mask != 0; ch++, mask >>= 1) {
+ if (mask & 1)
+ StartSoundMain(ch);
+ }
+
+ mask = work->channels_on = spu.dwChannelOn & 0xffffff;
+ spu.decode_dirty_ch |= mask & 0x0a;
+
+ for (ch = 0; mask != 0; ch++, mask >>= 1)
+ {
+ if (!(mask & 1)) continue;
+
+ s_chan = &spu.s_chan[ch];
+ work->ch[ch].spos = s_chan->spos;
+ work->ch[ch].sbpos = s_chan->iSBPos;
+ work->ch[ch].sinc = s_chan->sinc;
+ work->ch[ch].adsr = s_chan->ADSRX;
+ work->ch[ch].start = s_chan->pCurr - spu.spuMemC;
+ work->ch[ch].loop = s_chan->pLoop - spu.spuMemC;
+ if (s_chan->prevflags & 1)
+ work->ch[ch].start = work->ch[ch].loop;
+
+ d = do_samples_skip(ch, ns_to);
+ work->ch[ch].ns_to = d;
+
+ // note: d is not accurate on skip
+ d = SkipADSR(&s_chan->ADSRX, d);
+ if (d < ns_to) {
+ spu.dwChannelOn &= ~(1 << ch);
+ s_chan->ADSRX.EnvelopeVol = 0;
+ }
+ }
+
+ worker->i_ready++;
+ thread_work_start();
+}
+
+static void do_channel_work(struct work_item *work)
+{
+ unsigned int mask;
+ unsigned int decode_dirty_ch = 0;
+ int *SB, sinc, spos, sbpos;
+ int d, ch, ns_to;
+ SPUCHAN *s_chan;
+
+ ns_to = work->ns_to;
+ memset(work->RVB, 0, ns_to * sizeof(work->RVB[0]) * 2);
+
+ mask = work->channels_new;
+ for (ch = 0; mask != 0; ch++, mask >>= 1) {
+ if (mask & 1)
+ StartSoundSB(spu.SB + ch * SB_SIZE);
+ }
+
+ mask = work->channels_on;
+ for (ch = 0; mask != 0; ch++, mask >>= 1)
+ {
+ if (!(mask & 1)) continue;
+
+ d = work->ch[ch].ns_to;
+ spos = work->ch[ch].spos;
+ sbpos = work->ch[ch].sbpos;
+ sinc = work->ch[ch].sinc;
+
+ s_chan = &spu.s_chan[ch];
+ SB = spu.SB + ch * SB_SIZE;
+
+ if (s_chan->bNoise)
+ do_lsfr_samples(d, work->ctrl, &spu.dwNoiseCount, &spu.dwNoiseVal);
+ else if (s_chan->bFMod == 2
+ || (s_chan->bFMod == 0 && spu_config.iUseInterpolation == 0))
+ do_samples_noint(decode_block_work, work, ch, d, SB, sinc, &spos, &sbpos);
+ else if (s_chan->bFMod == 0 && spu_config.iUseInterpolation == 1)
+ do_samples_simple(decode_block_work, work, ch, d, SB, sinc, &spos, &sbpos);
+ else
+ do_samples_default(decode_block_work, work, ch, d, SB, sinc, &spos, &sbpos);
+
+ d = MixADSR(&work->ch[ch].adsr, d);
+ if (d < ns_to) {
+ work->ch[ch].adsr.EnvelopeVol = 0;
+ memset(&ChanBuf[d], 0, (ns_to - d) * sizeof(ChanBuf[0]));
+ }
+
+ if (ch == 1 || ch == 3)