/**
 * Furnace Tracker - multi-system chiptune tracker
 * Copyright (C) 2021-2023 tildearrow and contributors
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along
 * with this program; if not, write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 */

#include "x1_010.h"
#include "../engine.h"
#include "../../ta-log.h"
#include <math.h>

//#define rWrite(a,v) pendingWrites[a]=v;
#define rWrite(a,v) if (!skipRegisterWrites) { x1_010.ram_w(a,v); if (dumpWrites) { addWrite(a,v); } }

#define chRead(c,a) x1_010.ram_r((c<<3)|(a&7))
#define chWrite(c,a,v) rWrite((c<<3)|(a&7),v)
#define waveWrite(c,a,v) rWrite(0x1000|(chan[c].waveBank<<11)|(c<<7)|(a&0x7f),(v-128)&0xff)
#define envFill(c,a) rWrite(0x800|(c<<7)|(a&0x7f),(chan[c].lvol<<4)|chan[c].rvol)
#define envWrite(c,a,l,r) rWrite(0x800|(c<<7)|(a&0x7f),(((chan[c].lvol*(l))/15)<<4)|((chan[c].rvol*(r))/15))

#define refreshControl(c) chWrite(c,0,chan[c].active?(chan[c].pcm?1:((chan[c].env.flag.envEnable && chan[c].env.flag.envOneshot)?7:3)):0);

#define CHIP_FREQBASE 4194304

const char* regCheatSheetX1_010[]={
  // Channel registers
  "Ch00_Control",       "0000",
  "Ch00_PCMVol_WavSel", "0001",
  "Ch00_FreqL",         "0002",
  "Ch00_FreqH",         "0003",
  "Ch00_Start_EnvFrq",  "0004",
  "Ch00_End_EnvSel",    "0005",
  "Ch01_Control",       "0008",
  "Ch01_PCMVol_WavSel", "0009",
  "Ch01_FreqL",         "000A",
  "Ch01_FreqH",         "000B",
  "Ch01_Start_EnvFrq",  "000C",
  "Ch01_End_EnvSel",    "000D",
  "Ch02_Control",       "0010",
  "Ch02_PCMVol_WavSel", "0011",
  "Ch02_FreqL",         "0012",
  "Ch02_FreqH",         "0013",
  "Ch02_Start_EnvFrq",  "0014",
  "Ch02_End_EnvSel",    "0015",
  "Ch03_Control",       "0018",
  "Ch03_PCMVol_WavSel", "0019",
  "Ch03_FreqL",         "001A",
  "Ch03_FreqH",         "001B",
  "Ch03_Start_EnvFrq",  "001C",
  "Ch03_End_EnvSel",    "001D",
  "Ch04_Control",       "0020",
  "Ch04_PCMVol_WavSel", "0021",
  "Ch04_FreqL",         "0022",
  "Ch04_FreqH",         "0023",
  "Ch04_Start_EnvFrq",  "0024",
  "Ch04_End_EnvSel",    "0025",
  "Ch05_Control",       "0028",
  "Ch05_PCMVol_WavSel", "0029",
  "Ch05_FreqL",         "002A",
  "Ch05_FreqH",         "002B",
  "Ch05_Start_EnvFrq",  "002C",
  "Ch05_End_EnvSel",    "002D",
  "Ch06_Control",       "0030",
  "Ch06_PCMVol_WavSel", "0031",
  "Ch06_FreqL",         "0032",
  "Ch06_FreqH",         "0033",
  "Ch06_Start_EnvFrq",  "0034",
  "Ch06_End_EnvSel",    "0035",
  "Ch07_Control",       "0038",
  "Ch07_PCMVol_WavSel", "0039",
  "Ch07_FreqL",         "003A",
  "Ch07_FreqH",         "003B",
  "Ch07_Start_EnvFrq",  "003C",
  "Ch07_End_EnvSel",    "003D",
  "Ch08_Control",       "0040",
  "Ch08_PCMVol_WavSel", "0041",
  "Ch08_FreqL",         "0042",
  "Ch08_FreqH",         "0043",
  "Ch08_Start_EnvFrq",  "0044",
  "Ch08_End_EnvSel",    "0045",
  "Ch09_Control",       "0048",
  "Ch09_PCMVol_WavSel", "0049",
  "Ch09_FreqL",         "004A",
  "Ch09_FreqH",         "004B",
  "Ch09_Start_EnvFrq",  "004C",
  "Ch09_End_EnvSel",    "004D",
  "Ch10_Control",       "0050",
  "Ch10_PCMVol_WavSel", "0051",
  "Ch10_FreqL",         "0052",
  "Ch10_FreqH",         "0053",
  "Ch10_Start_EnvFrq",  "0054",
  "Ch10_End_EnvSel",    "0055",
  "Ch11_Control",       "0058",
  "Ch11_PCMVol_WavSel", "0059",
  "Ch11_FreqL",         "005A",
  "Ch11_FreqH",         "005B",
  "Ch11_Start_EnvFrq",  "005C",
  "Ch11_End_EnvSel",    "005D",
  "Ch12_Control",       "0060",
  "Ch12_PCMVol_WavSel", "0061",
  "Ch12_FreqL",         "0062",
  "Ch12_FreqH",         "0063",
  "Ch12_Start_EnvFrq",  "0064",
  "Ch12_End_EnvSel",    "0065",
  "Ch13_Control",       "0068",
  "Ch13_PCMVol_WavSel", "0069",
  "Ch13_FreqL",         "006A",
  "Ch13_FreqH",         "006B",
  "Ch13_Start_EnvFrq",  "006C",
  "Ch13_End_EnvSel",    "006D",
  "Ch14_Control",       "0070",
  "Ch14_PCMVol_WavSel", "0071",
  "Ch14_FreqL",         "0072",
  "Ch14_FreqH",         "0073",
  "Ch14_Start_EnvFrq",  "0074",
  "Ch14_End_EnvSel",    "0075",
  "Ch15_Control",       "0078",
  "Ch15_PCMVol_WavSel", "0079",
  "Ch15_FreqL",         "007A",
  "Ch15_FreqH",         "007B",
  "Ch15_Start_EnvFrq",  "007C",
  "Ch15_End_EnvSel",    "007D",
  // Envelope data
  "Env01Data",          "0080",
  "Env02Data",          "0100",
  "Env03Data",          "0180",
  "Env04Data",          "0200",
  "Env05Data",          "0280",
  "Env06Data",          "0300",
  "Env07Data",          "0380",
  "Env08Data",          "0400",
  "Env09Data",          "0480",
  "Env10Data",          "0500",
  "Env11Data",          "0580",
  "Env12Data",          "0600",
  "Env13Data",          "0680",
  "Env14Data",          "0700",
  "Env15Data",          "0780",
  "Env16Data",          "0800",
  "Env17Data",          "0880",
  "Env18Data",          "0900",
  "Env19Data",          "0980",
  "Env20Data",          "0A00",
  "Env21Data",          "0A80",
  "Env22Data",          "0B00",
  "Env23Data",          "0B80",
  "Env24Data",          "0C00",
  "Env25Data",          "0C80",
  "Env26Data",          "0D00",
  "Env27Data",          "0D80",
  "Env28Data",          "0E00",
  "Env29Data",          "0E80",
  "Env30Data",          "0F00",
  "Env31Data",          "0F80",
  // Wavetable data
  "Wave00Data",         "1000",
  "Wave01Data",         "1080",
  "Wave02Data",         "1100",
  "Wave03Data",         "1180",
  "Wave04Data",         "1200",
  "Wave05Data",         "1280",
  "Wave06Data",         "1300",
  "Wave07Data",         "1380",
  "Wave08Data",         "1400",
  "Wave09Data",         "1480",
  "Wave10Data",         "1500",
  "Wave11Data",         "1580",
  "Wave12Data",         "1600",
  "Wave13Data",         "1680",
  "Wave14Data",         "1700",
  "Wave15Data",         "1780",
  "Wave16Data",         "1800",
  "Wave17Data",         "1880",
  "Wave18Data",         "1900",
  "Wave19Data",         "1980",
  "Wave20Data",         "1A00",
  "Wave21Data",         "1A80",
  "Wave22Data",         "1B00",
  "Wave23Data",         "1B80",
  "Wave24Data",         "1C00",
  "Wave25Data",         "1C80",
  "Wave26Data",         "1D00",
  "Wave27Data",         "1D80",
  "Wave28Data",         "1E00",
  "Wave29Data",         "1E80",
  "Wave30Data",         "1F00",
  "Wave31Data",         "1F80",
  NULL
};

const char** DivPlatformX1_010::getRegisterSheet() {
  return regCheatSheetX1_010;
}

void DivPlatformX1_010::acquire(short** buf, size_t len) {
  for (size_t h=0; h<len; h++) {
    x1_010.tick();

    signed int tempL=x1_010.output(0);
    signed int tempR=x1_010.output(1);

    if (tempL<-32768) tempL=-32768;
    if (tempL>32767) tempL=32767;
    if (tempR<-32768) tempR=-32768;
    if (tempR>32767) tempR=32767;

    //printf("tempL: %d tempR: %d\n",tempL,tempR);
    buf[0][h]=stereo?tempL:((tempL+tempR)>>1);
    if (stereo) buf[1][h]=tempR;

    for (int i=0; i<16; i++) {
      int vo=(x1_010.voice_out(i,0)+x1_010.voice_out(i,1))<<2;
      oscBuf[i]->data[oscBuf[i]->needle++]=CLAMP(vo,-32768,32767);
    }
  }
}

u8 DivPlatformX1_010::read_byte(u32 address) {
  if ((sampleMem!=NULL) && (address<getSampleMemCapacity())) {
    if (isBanked) {
      address=((bankSlot[(address>>17)&7]<<17)|(address&0x1ffff))&0xffffff;
    } else {
      address&=0xfffff;
    }
    return sampleMem[address];
  }
  return 0;
}

double DivPlatformX1_010::NoteX1_010(int ch, int note) {
  if (chan[ch].pcm) { // PCM note
    double off=8192.0;
    int sample=chan[ch].sample;
    if (sample>=0 && sample<parent->song.sampleLen) {
      DivSample* s=parent->getSample(sample);
      if (s->centerRate<1) {
        off=8192.0;
      } else {
        off=8192.0*(s->centerRate/8363.0);
      }
    }
    return parent->calcBaseFreq(chipClock,off,note,false);
  }
  // Wavetable note
  return NOTE_FREQUENCY(note);
}

void DivPlatformX1_010::updateWave(int ch) {
  if (chan[ch].active) {
    chan[ch].waveBank^=1;
  }
  for (int i=0; i<128; i++) {
    int data=chan[ch].ws.output[i];
    waveWrite(ch,i,data);
  }
  if (!chan[ch].pcm) {
    chWrite(ch,1,(chan[ch].waveBank<<4)|(ch&0xf));
  }
}

void DivPlatformX1_010::updateEnvelope(int ch) {
  if (!chan[ch].pcm) {
    if (isMuted[ch]) {
      for (int i=0; i<128; i++) {
        rWrite(0x800|(ch<<7)|(i&0x7f),0);
      }
    } else {
      if (!chan[ch].env.flag.envEnable) {
        for (int i=0; i<128; i++) {
          envFill(ch,i);
        }
      } else {
        DivWavetable* wt=parent->getWave(chan[ch].env.shape);
        for (int i=0; i<128; i++) {
          if (wt->max<1 || wt->len<1) {
            envFill(ch,i);
          } else if (chan[ch].env.flag.envSplit || chan[ch].env.flag.envHinvR || chan[ch].env.flag.envVinvR || chan[ch].env.flag.envHinvL || chan[ch].env.flag.envVinvL) { // Stereo config 
            int la=i,ra=i;
            int lo,ro;
            if (chan[ch].env.flag.envHinvR) { ra=127-i; } // horizontal invert right envelope
            if (chan[ch].env.flag.envHinvL) { la=127-i; } // horizontal invert left envelope
            if (chan[ch].env.flag.envSplit) { // Split shape to left and right half
              lo=wt->data[la*(wt->len/128/2)]*15/wt->max;
              ro=wt->data[(ra+128)*(wt->len/128/2)]*15/wt->max;
            } else {
              lo=wt->data[la*wt->len/128]*15/wt->max;
              ro=wt->data[ra*wt->len/128]*15/wt->max;
            }
            if (chan[ch].env.flag.envVinvR) { ro=15-ro; } // vertical invert right envelope
            if (chan[ch].env.flag.envVinvL) { lo=15-lo; } // vertical invert left envelope
            if (lo<0) lo=0;
            if (lo>15) lo=15;
            if (ro<0) ro=0;
            if (ro>15) ro=15;
            envWrite(ch,i,lo,ro);
          } else {
            int out=wt->data[i*wt->len/128]*15/wt->max;
            if (out<0) out=0;
            if (out>15) out=15;
            envWrite(ch,i,out,out);
          }
        }
      }
    }
    chWrite(ch,5,0x10|(ch&0xf));
  } else {
    chWrite(ch,1,isMuted[ch]?0:((chan[ch].lvol<<4)|chan[ch].rvol));
  }
}

void DivPlatformX1_010::tick(bool sysTick) {
  for (int i=0; i<16; i++) {
    chan[i].std.next();
    if (chan[i].std.vol.had) {
      signed char macroVol=((chan[i].vol&15)*MIN(chan[i].macroVolMul,chan[i].std.vol.val))/(chan[i].macroVolMul);
      if ((!isMuted[i]) && (macroVol!=chan[i].outVol)) {
        chan[i].outVol=macroVol;
        chan[i].envChanged=true;
      }
    }
    if ((!chan[i].pcm) || chan[i].furnacePCM) {
      if (NEW_ARP_STRAT) {
        chan[i].handleArp();
      } else if (chan[i].std.arp.had) {
        if (!chan[i].inPorta) {
          chan[i].baseFreq=NoteX1_010(i,parent->calcArp(chan[i].note,chan[i].std.arp.val));
        }
        chan[i].freqChanged=true;
      }
    }
    if (chan[i].std.wave.had && !chan[i].pcm) {
      if (chan[i].wave!=chan[i].std.wave.val || chan[i].ws.activeChanged()) {
        chan[i].wave=chan[i].std.wave.val;
        if (!chan[i].pcm) {
          chan[i].ws.changeWave1(chan[i].wave);
          if (!chan[i].keyOff) chan[i].keyOn=true;
        }
      }
    }
    if (chan[i].std.panL.had) {
      chan[i].pan&=0x0f;
      chan[i].pan|=(chan[i].std.panL.val&15)<<4;
      chan[i].envChanged=true;
    }
    if (chan[i].std.panR.had) {
      chan[i].pan&=0xf0;
      chan[i].pan|=chan[i].std.panR.val&15;
      chan[i].envChanged=true;
    }
    if (chan[i].std.pitch.had) {
      if (chan[i].std.pitch.mode) {
        chan[i].pitch2+=chan[i].std.pitch.val;
        CLAMP_VAR(chan[i].pitch2,-65535,65535);
      } else {
        chan[i].pitch2=chan[i].std.pitch.val;
      }
      chan[i].freqChanged=true;
    }
    if (chan[i].std.ex1.had) {
      bool nextEnable=(chan[i].std.ex1.val&1);
      if (nextEnable!=(chan[i].env.flag.envEnable)) {
        chan[i].env.flag.envEnable=nextEnable;
        if (!chan[i].pcm) {
          if (!isMuted[i]) {
            chan[i].envChanged=true;
          }
          refreshControl(i);
        }
      }
      bool nextOneshot=(chan[i].std.ex1.val&2);
      if (nextOneshot!=(chan[i].env.flag.envOneshot)) {
        chan[i].env.flag.envOneshot=nextOneshot;
        if (!chan[i].pcm) {
          refreshControl(i);
        }
      }
      bool nextSplit=(chan[i].std.ex1.val&4);
      if (nextSplit!=(chan[i].env.flag.envSplit)) {
        chan[i].env.flag.envSplit=nextSplit;
        if (!isMuted[i] && !chan[i].pcm) {
          chan[i].envChanged=true;
        }
      }
      bool nextHinvR=(chan[i].std.ex1.val&8);
      if (nextHinvR!=(chan[i].env.flag.envHinvR)) {
        chan[i].env.flag.envHinvR=nextHinvR;
        if (!isMuted[i] && !chan[i].pcm) {
          chan[i].envChanged=true;
        }
      }
      bool nextVinvR=(chan[i].std.ex1.val&16);
      if (nextVinvR!=(chan[i].env.flag.envVinvR)) {
        chan[i].env.flag.envVinvR=nextVinvR;
        if (!isMuted[i] && !chan[i].pcm) {
          chan[i].envChanged=true;
        }
      }
      bool nextHinvL=(chan[i].std.ex1.val&32);
      if (nextHinvL!=(chan[i].env.flag.envHinvL)) {
        chan[i].env.flag.envHinvL=nextHinvL;
        if (!isMuted[i] && !chan[i].pcm) {
          chan[i].envChanged=true;
        }
      }
      bool nextVinvL=(chan[i].std.ex1.val&64);
      if (nextVinvL!=(chan[i].env.flag.envVinvL)) {
        chan[i].env.flag.envVinvL=nextVinvL;
        if (!isMuted[i] && !chan[i].pcm) {
          chan[i].envChanged=true;
        }
      }
    }
    if (chan[i].std.ex2.had) {
      if (chan[i].env.shape!=chan[i].std.ex2.val) {
        chan[i].env.shape=chan[i].std.ex2.val;
        if (!chan[i].pcm) {
          if (chan[i].env.flag.envEnable && (!isMuted[i])) {
            chan[i].envChanged=true;
          }
          if (!chan[i].keyOff) chan[i].keyOn=true;
        }
      }
    }
    if (chan[i].std.ex3.had) {
      chan[i].autoEnvNum=chan[i].std.ex3.val;
      if (!chan[i].pcm) {
        chan[i].freqChanged=true;
        if (!chan[i].std.alg.will) chan[i].autoEnvDen=1;
      }
    }
    if (chan[i].std.alg.had) {
      chan[i].autoEnvDen=chan[i].std.alg.val;
      if (!chan[i].pcm) {
        chan[i].freqChanged=true;
        if (!chan[i].std.ex3.will) chan[i].autoEnvNum=1;
      }
    }
    if (chan[i].std.phaseReset.had) {
      if (chan[i].std.phaseReset.val && chan[i].active && chan[i].pcm) {
        chWrite(i,0,0);
        refreshControl(i);
      }
    }
    if (chan[i].active) {
      if (chan[i].ws.tick()) {
        updateWave(i);
      }
    }
    if (chan[i].envChanged) {
      chan[i].lvol=isMuted[i]?0:(((chan[i].outVol&0xf)*((chan[i].pan>>4)&0xf))/15);
      chan[i].rvol=isMuted[i]?0:(((chan[i].outVol&0xf)*((chan[i].pan>>0)&0xf))/15);
      updateEnvelope(i);
      chan[i].envChanged=false;
    }
    if (chan[i].freqChanged || chan[i].keyOn || chan[i].keyOff) {
      double off=8192.0;
      if (chan[i].pcm) {
        int sample=chan[i].sample;
        if (sample>=0 && sample<parent->song.sampleLen) {
          DivSample* s=parent->getSample(sample);
          if (s->centerRate<1) {
            off=8192.0;
          } else {
            off=8192.0*(s->centerRate/8363.0);
          }
        }
      }
      chan[i].freq=parent->calcFreq(chan[i].baseFreq,chan[i].pitch,chan[i].fixedArp?chan[i].baseNoteOverride:chan[i].arpOff,chan[i].fixedArp,false,2,chan[i].pitch2,chipClock,chan[i].pcm?off:CHIP_FREQBASE);
      if (chan[i].fixedFreq) chan[i].freq=chan[i].fixedFreq;
      if (chan[i].pcm) {
        if (chan[i].freq<1) chan[i].freq=1;
        if (chan[i].freq>255) chan[i].freq=255;
        chWrite(i,2,chan[i].freq&0xff);
      } else {
        if (chan[i].freq<0) chan[i].freq=0;
        if (chan[i].freq>65535) chan[i].freq=65535;
        chWrite(i,2,chan[i].freq&0xff);
        chWrite(i,3,(chan[i].freq>>8)&0xff);
        if (chan[i].freqChanged && chan[i].autoEnvNum>0 && chan[i].autoEnvDen>0) {
          chan[i].env.period=(chan[i].freq*chan[i].autoEnvDen/chan[i].autoEnvNum)>>12;
          chWrite(i,4,chan[i].env.period);
        }
      }
      if (chan[i].keyOn || chan[i].keyOff || (chRead(i,0)&1)) {
        refreshControl(i);
      }
      if (chan[i].keyOn) chan[i].keyOn=false;
      if (chan[i].keyOff) chan[i].keyOff=false;
      chan[i].freqChanged=false;
    }
    if (chan[i].env.slide!=0) {
      chan[i].env.slidefrac+=chan[i].env.slide;
      while (chan[i].env.slidefrac>0xf) {
        chan[i].env.slidefrac-=0x10;
        if (chan[i].env.period<0xff) {
          chan[i].env.period++;
          if (!chan[i].pcm) {
            chWrite(i,4,chan[i].env.period);
          }
        }
      }
      while (chan[i].env.slidefrac<-0xf) {
        chan[i].env.slidefrac+=0x10;
        if (chan[i].env.period>0) {
          chan[i].env.period--;
          if (!chan[i].pcm) {
            chWrite(i,4,chan[i].env.period);
          }
        }
      }
    }
  }
}

int DivPlatformX1_010::dispatch(DivCommand c) {
  switch (c.cmd) {
    case DIV_CMD_NOTE_ON: {
      chWrite(c.chan,0,0); // reset previous note
      DivInstrument* ins=parent->getIns(chan[c.chan].ins,DIV_INS_X1_010);
      chan[c.chan].macroVolMul=ins->type==DIV_INS_AMIGA?64:15;
      if ((ins->type==DIV_INS_AMIGA || ins->amiga.useSample) || chan[c.chan].pcm) {
        if (ins->type==DIV_INS_AMIGA || ins->amiga.useSample) {
          chan[c.chan].furnacePCM=true;
        } else {
          chan[c.chan].furnacePCM=false;
        }
        if (skipRegisterWrites) break;
        if (chan[c.chan].furnacePCM) {
          chan[c.chan].pcm=true;
          chan[c.chan].macroInit(ins);
          if (c.value!=DIV_NOTE_NULL) {
            chan[c.chan].sample=ins->amiga.getSample(c.value);
            c.value=ins->amiga.getFreq(c.value);
          }
          if (chan[c.chan].sample>=0 && chan[c.chan].sample<parent->song.sampleLen) {
            DivSample* s=parent->getSample(chan[c.chan].sample);
            if (isBanked) {
              chan[c.chan].bankSlot=ins->x1_010.bankSlot;
              bankSlot[chan[c.chan].bankSlot]=sampleOffX1[chan[c.chan].sample]>>17;
              unsigned int bankedOffs=(chan[c.chan].bankSlot<<17)|(sampleOffX1[chan[c.chan].sample]&0x1ffff);
              chWrite(c.chan,4,(bankedOffs>>12)&0xff);
              int end=(bankedOffs+MIN(s->length8,0x1ffff)+0xfff)&~0xfff; // padded
              chWrite(c.chan,5,(0x100-(end>>12))&0xff);
            } else {
              chWrite(c.chan,4,(sampleOffX1[chan[c.chan].sample]>>12)&0xff);
              int end=(sampleOffX1[chan[c.chan].sample]+s->length8+0xfff)&~0xfff; // padded
              chWrite(c.chan,5,(0x100-(end>>12))&0xff);
            }
            if (c.value!=DIV_NOTE_NULL) {
              chan[c.chan].note=c.value;
              chan[c.chan].baseFreq=NoteX1_010(c.chan,chan[c.chan].note);
              chan[c.chan].fixedFreq=0;
              chan[c.chan].freqChanged=true;
            }
          } else {
            chan[c.chan].macroInit(NULL);
            chan[c.chan].outVol=chan[c.chan].vol;
            // huh?
            if ((12*sampleBank+c.value%12)>=parent->song.sampleLen) {
              chWrite(c.chan,0,0); // reset
              chWrite(c.chan,1,0);
              chWrite(c.chan,2,0);
              chWrite(c.chan,4,0);
              chWrite(c.chan,5,0);
              break;
            }
          }
        } else {
          chan[c.chan].macroInit(NULL);
          chan[c.chan].outVol=chan[c.chan].vol;
          chan[c.chan].sample=12*sampleBank+c.value%12;
          if (chan[c.chan].sample<0 || chan[c.chan].sample>=parent->song.sampleLen) {
            chWrite(c.chan,0,0); // reset
            chWrite(c.chan,1,0);
            chWrite(c.chan,2,0);
            chWrite(c.chan,4,0);
            chWrite(c.chan,5,0);
            break;
          }
          DivSample* s=parent->getSample(chan[c.chan].sample);
          if (isBanked) {
            bankSlot[chan[c.chan].bankSlot]=sampleOffX1[chan[c.chan].sample]>>17;
            unsigned int bankedOffs=(chan[c.chan].bankSlot<<17)|(sampleOffX1[chan[c.chan].sample]&0x1ffff);
            chWrite(c.chan,4,(bankedOffs>>12)&0xff);
            int end=(bankedOffs+MIN(s->length8,0x1ffff)+0xfff)&~0xfff; // padded
            chWrite(c.chan,5,(0x100-(end>>12))&0xff);
          } else {
            chWrite(c.chan,4,(sampleOffX1[chan[c.chan].sample]>>12)&0xff);
            int end=(sampleOffX1[chan[c.chan].sample]+s->length8+0xfff)&~0xfff; // padded
            chWrite(c.chan,5,(0x100-(end>>12))&0xff);
          }
          // ????
          chan[c.chan].fixedFreq=(((unsigned int)s->rate)<<4)/(chipClock/512);
          chan[c.chan].freqChanged=true;
        }
      } else if (c.value!=DIV_NOTE_NULL) {
        chan[c.chan].note=c.value;
        chan[c.chan].baseFreq=NoteX1_010(c.chan,chan[c.chan].note);
        chan[c.chan].fixedFreq=0;
        chan[c.chan].freqChanged=true;
      }
      chan[c.chan].active=true;
      chan[c.chan].keyOn=true;
      chan[c.chan].envChanged=true;
      chan[c.chan].macroInit(ins);
      if (!parent->song.brokenOutVol && !chan[c.chan].std.vol.will) {
        chan[c.chan].outVol=chan[c.chan].vol;
      }
      if (chan[c.chan].wave<0) {
        chan[c.chan].wave=0;
        chan[c.chan].ws.changeWave1(chan[c.chan].wave);
      }
      chan[c.chan].ws.init(ins,128,255,chan[c.chan].insChanged);
      chan[c.chan].insChanged=false;
      refreshControl(c.chan);
      break;
    }
    case DIV_CMD_NOTE_OFF:
      chan[c.chan].pcm=false;
      chan[c.chan].active=false;
      chan[c.chan].keyOff=true;
      chan[c.chan].macroInit(NULL);
      break;
    case DIV_CMD_NOTE_OFF_ENV:
    case DIV_CMD_ENV_RELEASE:
      chan[c.chan].std.release();
      break;
    case DIV_CMD_INSTRUMENT:
      if (chan[c.chan].ins!=c.value || c.value2==1) {
        chan[c.chan].ins=c.value;
        chan[c.chan].insChanged=true;
      }
      break;
    case DIV_CMD_VOLUME:
      if (chan[c.chan].vol!=c.value) {
        chan[c.chan].vol=c.value;
        if (!chan[c.chan].std.vol.has) {
          if (chan[c.chan].outVol!=c.value) {
            chan[c.chan].outVol=c.value;
            if (!isMuted[c.chan]) {
              chan[c.chan].envChanged=true;
            }
          }
        }
      }
      break;
    case DIV_CMD_GET_VOLUME:
      if (chan[c.chan].std.vol.has) {
        return chan[c.chan].vol;
      }
      return chan[c.chan].outVol;
      break;
    case DIV_CMD_PITCH:
      chan[c.chan].pitch=c.value;
      chan[c.chan].freqChanged=true;
      break;
    case DIV_CMD_WAVE:
      chan[c.chan].wave=c.value;
      chan[c.chan].ws.changeWave1(chan[c.chan].wave);
      chan[c.chan].keyOn=true;
      break;
    case DIV_CMD_X1_010_ENVELOPE_SHAPE:
      if (chan[c.chan].env.shape!=c.value) {
        chan[c.chan].env.shape=c.value;
        if (!chan[c.chan].pcm) {
          if (chan[c.chan].env.flag.envEnable && (!isMuted[c.chan])) {
            chan[c.chan].envChanged=true;
          }
          chan[c.chan].keyOn=true;
        }
      }
      break;
    case DIV_CMD_NOTE_PORTA: {
      int destFreq=NoteX1_010(c.chan,c.value2);
      bool return2=false;
      if (destFreq>chan[c.chan].baseFreq) {
        chan[c.chan].baseFreq+=c.value;
        if (chan[c.chan].baseFreq>=destFreq) {
          chan[c.chan].baseFreq=destFreq;
          return2=true;
        }
      } else {
        chan[c.chan].baseFreq-=c.value;
        if (chan[c.chan].baseFreq<=destFreq) {
          chan[c.chan].baseFreq=destFreq;
          return2=true;
        }
      }
      chan[c.chan].freqChanged=true;
      if (return2) {
        chan[c.chan].inPorta=false;
        return 2;
      }
      break;
    }
    case DIV_CMD_SAMPLE_MODE:
      if (chan[c.chan].pcm!=(c.value&1)) {
        chan[c.chan].pcm=c.value&1;
        chan[c.chan].freqChanged=true;
        chan[c.chan].envChanged=true;
      }
      break;
    case DIV_CMD_SAMPLE_BANK:
      sampleBank=c.value;
      if (sampleBank>(parent->song.sample.size()/12)) {
        sampleBank=parent->song.sample.size()/12;
      }
      break;
    case DIV_CMD_PANNING: {
      if (!stereo) break;
      unsigned char newPan=(c.value&0xf0)|(c.value2>>4);
      if (chan[c.chan].pan!=newPan) {
        chan[c.chan].pan=newPan;
        if (!isMuted[c.chan]) {
          chan[c.chan].envChanged=true;
        }
      }
      break;
    }
    case DIV_CMD_LEGATO:
      chan[c.chan].note=c.value;
      chan[c.chan].baseFreq=NoteX1_010(c.chan,chan[c.chan].note+((HACKY_LEGATO_MESS)?(chan[c.chan].std.arp.val):(0)));
      chan[c.chan].freqChanged=true;
      break;
    case DIV_CMD_PRE_PORTA:
      if (chan[c.chan].active && c.value2) {
        if (parent->song.resetMacroOnPorta) chan[c.chan].macroInit(parent->getIns(chan[c.chan].ins,DIV_INS_X1_010));
      }
      if (!chan[c.chan].inPorta && c.value && !parent->song.brokenPortaArp && chan[c.chan].std.arp.will && !NEW_ARP_STRAT) chan[c.chan].baseFreq=NoteX1_010(c.chan,chan[c.chan].note);
      chan[c.chan].inPorta=c.value;
      break;
    case DIV_CMD_SAMPLE_FREQ:
      if (chan[c.chan].pcm) {
        chan[c.chan].freq=MAX(1,c.value&0xff);
        chWrite(c.chan,2,chan[c.chan].freq&0xff);
        if (chRead(c.chan,0)&1) {
          refreshControl(c.chan);
        }
      }
      break;
    case DIV_CMD_X1_010_ENVELOPE_MODE: {
      bool nextEnable=c.value&1;
      if (nextEnable!=(chan[c.chan].env.flag.envEnable)) {
        chan[c.chan].env.flag.envEnable=nextEnable;
        if (!chan[c.chan].pcm) {
          if (!isMuted[c.chan]) {
            chan[c.chan].envChanged=true;
          }
          refreshControl(c.chan);
        }
      }
      bool nextOneshot=c.value&2;
      if (nextOneshot!=(chan[c.chan].env.flag.envOneshot)) {
        chan[c.chan].env.flag.envOneshot=nextOneshot;
        if (!chan[c.chan].pcm) {
          refreshControl(c.chan);
        }
      }
      bool nextSplit=c.value&4;
      if (nextSplit!=(chan[c.chan].env.flag.envSplit)) {
        chan[c.chan].env.flag.envSplit=nextSplit;
        if (!isMuted[c.chan] && !chan[c.chan].pcm) {
          chan[c.chan].envChanged=true;
        }
      }
      bool nextHinvR=c.value&8;
      if (nextHinvR!=(chan[c.chan].env.flag.envHinvR)) {
        chan[c.chan].env.flag.envHinvR=nextHinvR;
        if (!isMuted[c.chan] && !chan[c.chan].pcm) {
          chan[c.chan].envChanged=true;
        }
      }
      bool nextVinvR=c.value&16;
      if (nextVinvR!=(chan[c.chan].env.flag.envVinvR)) {
        chan[c.chan].env.flag.envVinvR=nextVinvR;
        if (!isMuted[c.chan] && !chan[c.chan].pcm) {
          chan[c.chan].envChanged=true;
        }
      }
      bool nextHinvL=c.value&32;
      if (nextHinvL!=(chan[c.chan].env.flag.envHinvL)) {
        chan[c.chan].env.flag.envHinvL=nextHinvL;
        if (!isMuted[c.chan] && !chan[c.chan].pcm) {
          chan[c.chan].envChanged=true;
        }
      }
      bool nextVinvL=c.value&64;
      if (nextVinvL!=(chan[c.chan].env.flag.envVinvL)) {
        chan[c.chan].env.flag.envVinvL=nextVinvL;
        if (!isMuted[c.chan] && !chan[c.chan].pcm) {
          chan[c.chan].envChanged=true;
        }
      }
      break;
    }
    case DIV_CMD_X1_010_ENVELOPE_PERIOD:
      chan[c.chan].env.period=c.value;
      if (!chan[c.chan].pcm) {
        chWrite(c.chan,4,chan[c.chan].env.period);
      }
      break;
    case DIV_CMD_X1_010_ENVELOPE_SLIDE:
      chan[c.chan].env.slide=c.value;
      break;
    case DIV_CMD_X1_010_AUTO_ENVELOPE:
      chan[c.chan].autoEnvNum=c.value>>4;
      chan[c.chan].autoEnvDen=c.value&15;
      chan[c.chan].freqChanged=true;
      break;
    case DIV_CMD_X1_010_SAMPLE_BANK_SLOT:
      chan[c.chan].bankSlot=c.value&7;
      break;
    case DIV_CMD_GET_VOLMAX:
      return 15;
      break;
    case DIV_CMD_MACRO_OFF:
      chan[c.chan].std.mask(c.value,true);
      break;
    case DIV_CMD_MACRO_ON:
      chan[c.chan].std.mask(c.value,false);
      break;
    case DIV_ALWAYS_SET_VOLUME:
      return 1;
      break;
    default:
      break;
  }
  return 1;
}

void DivPlatformX1_010::muteChannel(int ch, bool mute) {
  isMuted[ch]=mute;
  chan[ch].envChanged=true;
}

void DivPlatformX1_010::forceIns() {
  for (int i=0; i<16; i++) {
    chan[i].insChanged=true;
    chan[i].envChanged=true;
    chan[i].freqChanged=true;
    updateWave(i);
  }
}

void* DivPlatformX1_010::getChanState(int ch) {
  return &chan[ch];
}

DivMacroInt* DivPlatformX1_010::getChanMacroInt(int ch) {
  return &chan[ch].std;
}

DivDispatchOscBuffer* DivPlatformX1_010::getOscBuffer(int ch) {
  return oscBuf[ch];
}

unsigned char* DivPlatformX1_010::getRegisterPool() {
  for (int i=0; i<0x2000; i++) {
    regPool[i]=x1_010.ram_r(i);
  }
  return regPool;
}

int DivPlatformX1_010::getRegisterPoolSize() {
  return 0x2000;
}

void DivPlatformX1_010::reset() {
  memset(regPool,0,0x2000);
  for (int i=0; i<16; i++) {
    chan[i]=DivPlatformX1_010::Channel();
    chan[i].reset();
    chan[i].std.setEngine(parent);
    chan[i].ws.setEngine(parent);
    chan[i].ws.init(NULL,128,255,false);
  }
  x1_010.reset();
  sampleBank=0;
  // set per-channel initial panning
  for (int i=0; i<16; i++) {
    chWrite(i,0,0);
  }
  // set initial bank
  for (int b=0; b<8; b++) {
    bankSlot[b]=b;
  }
}

int DivPlatformX1_010::getOutputCount() {
  return stereo?2:1;
}

bool DivPlatformX1_010::keyOffAffectsArp(int ch) {
  return true;
}

float DivPlatformX1_010::getPostAmp() {
  return 4.0f;
}

void DivPlatformX1_010::notifyWaveChange(int wave) {
  for (int i=0; i<16; i++) {
    if (chan[i].wave==wave) {
      chan[i].ws.changeWave1(wave);
      updateWave(i);
    }
  }
}

void DivPlatformX1_010::notifyInsDeletion(void* ins) {
  for (int i=0; i<16; i++) {
    chan[i].std.notifyInsDeletion((DivInstrument*)ins);
  }
}

void DivPlatformX1_010::setFlags(const DivConfig& flags) {
  switch (flags.getInt("clockSel",0)) {
    case 1: // 16.67MHz (later hardwares)
      chipClock=50000000.0/3.0;
      break;
    case 2: // 14.32MHz (see https://github.com/mamedev/mame/blob/master/src/mame/taito/champbwl.cpp#L620)
      chipClock=COLOR_NTSC*4.0;
      break;
    // Other clock is used
    default: // 16MHz (earlier hardwares)
      chipClock=16000000;
      break;
  }
  CHECK_CUSTOM_CLOCK;
  rate=chipClock/512;
  stereo=flags.getBool("stereo",false);
  for (int i=0; i<16; i++) {
    oscBuf[i]->rate=rate;
  }
}

void DivPlatformX1_010::poke(unsigned int addr, unsigned short val) {
  rWrite(addr,val);
}

void DivPlatformX1_010::poke(std::vector<DivRegWrite>& wlist) {
  for (DivRegWrite& i: wlist) rWrite(i.addr,i.val);
}

const void* DivPlatformX1_010::getSampleMem(int index) {
  return index >= 0 ? sampleMem : 0;
}

size_t DivPlatformX1_010::getSampleMemCapacity(int index) {
  return index == 0 ? (isBanked?16777216:1048576):0;
}

size_t DivPlatformX1_010::getSampleMemUsage(int index) {
  return index >= 0 ? sampleMemLen : 0;
}

bool DivPlatformX1_010::isSampleLoaded(int index, int sample) {
  if (index!=0) return false;
  if (sample<0 || sample>255) return false;
  return sampleLoaded[sample];
}

void DivPlatformX1_010::renderSamples(int sysID) {
  memset(sampleMem,0,getSampleMemCapacity());
  memset(sampleOffX1,0,256*sizeof(unsigned int));
  memset(sampleLoaded,0,256*sizeof(bool));

  size_t memPos=0;
  for (int i=0; i<parent->song.sampleLen; i++) {
    DivSample* s=parent->song.sample[i];
    if (!s->renderOn[0][sysID]) {
      sampleOffX1[i]=0;
      continue;
    }
    
    int paddedLen=(s->length8+4095)&(~0xfff);
    if (isBanked) {
    // fit sample bank size to 128KB for Seta 2 external bankswitching logic (not emulated yet!)
      if (paddedLen>131072) {
        paddedLen=131072;
      }
      if ((memPos&0xfe0000)!=((memPos+paddedLen)&0xfe0000)) {
        memPos=(memPos+0x1ffff)&0xfe0000;
      }
    }
    if (memPos>=getSampleMemCapacity()) {
      logW("out of X1-010 memory for sample %d!",i);
      break;
    }
    if (memPos+paddedLen>=getSampleMemCapacity()) {
      memcpy(sampleMem+memPos,s->data8,getSampleMemCapacity()-memPos);
      logW("out of X1-010 memory for sample %d!",i);
    } else {
      memcpy(sampleMem+memPos,s->data8,paddedLen);
      sampleLoaded[i]=true;
    }
    sampleOffX1[i]=memPos;
    memPos+=paddedLen;
  }
  sampleMemLen=memPos+256;
}

void DivPlatformX1_010::setBanked(bool banked) {
  isBanked=banked;
}

int DivPlatformX1_010::init(DivEngine* p, int channels, int sugRate, const DivConfig& flags) {
  parent=p;
  dumpWrites=false;
  skipRegisterWrites=false;
  stereo=false;
  for (int i=0; i<16; i++) {
    isMuted[i]=false;
    oscBuf[i]=new DivDispatchOscBuffer;
  }
  setFlags(flags);
  sampleMem=new unsigned char[getSampleMemCapacity()];
  sampleMemLen=0;
  x1_010.reset();
  reset();
  return 16;
}

void DivPlatformX1_010::quit() {
  for (int i=0; i<16; i++) {
    delete oscBuf[i];
  }
  delete[] sampleMem;
}

DivPlatformX1_010::~DivPlatformX1_010() {
}
