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flycast/core/hw/aica/sgc_if.cpp

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/*
This file is part of reicast.
reicast 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.
reicast 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 reicast. If not, see <https://www.gnu.org/licenses/>.
Some PLFO and FEG code from Highly_Theoretical lib by Neill Corlett
(https://github.com/kode54/Highly_Theoretical)
*/
#include "sgc_if.h"
#include "aica.h"
#include "aica_if.h"
#include "aica_mem.h"
#include "dsp.h"
#include "oslib/audiostream.h"
#include "hw/gdrom/gdrom_if.h"
#include "cfg/option.h"
#include "serialize.h"
#include "hw/hwreg.h"
#include <algorithm>
#include <cmath>
#undef FAR
//#define CLIP_WARN
#define key_printf(...) DEBUG_LOG(AICA, __VA_ARGS__)
#define aeg_printf(...) DEBUG_LOG(AICA, __VA_ARGS__)
#define feg_printf(...) DEBUG_LOG(AICA, __VA_ARGS__)
#define step_printf(...) DEBUG_LOG(AICA, __VA_ARGS__)
#ifdef CLIP_WARN
#define clip_verify(x) verify(x)
#else
#define clip_verify(x)
#endif
//Sound generation, mixin, and channel regs emulation
//x.15
static s32 volume_lut[16];
//255 -> mute
//Converts Send levels to TL-compatible values (DISDL, etc)
static const u32 SendLevel[16] =
{
255, 14 << 3, 13 << 3, 12 << 3, 11 << 3, 10 << 3, 9 << 3, 8 << 3,
7 << 3, 6 << 3, 5 << 3, 4 << 3, 3 << 3, 2 << 3, 1 << 3, 0 << 3
};
static s32 tl_lut[256 + 768]; //xx.15 format. >=255 is muted
//in ms :)
static const double AEG_Attack_Time[64] =
{
-1,-1,8100.0,6900.0,6000.0,4800.0,4000.0,3400.0,3000.0,2400.0,2000.0,1700.0,1500.0,
1200.0,1000.0,860.0,760.0,600.0,500.0,430.0,380.0,300.0,250.0,220.0,190.0,150.0,130.0,110.0,95.0,
76.0,63.0,55.0,47.0,38.0,31.0,27.0,24.0,19.0,15.0,13.0,12.0,9.4,7.9,6.8,6.0,4.7,3.8,3.4,3.0,2.4,
2.0,1.8,1.6,1.3,1.1,0.93,0.85,0.65,0.53,0.44,0.40,0.35,0.0,0.0
};
static const double AEG_DSR_Time[64] =
{
-1,-1,118200.0,101300.0,88600.0,70900.0,59100.0,50700.0,44300.0,35500.0,29600.0,25300.0,22200.0,17700.0,
14800.0,12700.0,11100.0,8900.0,7400.0,6300.0,5500.0,4400.0,3700.0,3200.0,2800.0,2200.0,1800.0,1600.0,1400.0,1100.0,
920.0,790.0,690.0,550.0,460.0,390.0,340.0,270.0,230.0,200.0,170.0,140.0,110.0,98.0,85.0,68.0,57.0,49.0,43.0,34.0,
28.0,25.0,22.0,18.0,14.0,12.0,11.0,8.5,7.1,6.1,5.4,4.3,3.6,3.1
};
// These times come from the documentation but don't sound correct.
// HT uses the AEG decay times instead and it sounds better.
//static const double FEG_Time[] =
//{
// -1, -1, 472800.0, 405200.0, 354400.0, 283600.0, 236400.0, 202800.0,
// 177200.0, 142000.0, 118400.0, 101200.0, 88800.0, 70800.0, 59200.0, 50800.0,
// 44400.0, 35600.0, 29600.0, 25200.0, 22000.0, 17600.0, 14800.0, 12800.0,
// 11200.0, 8800.0, 7200.0, 6400.0, 5600.0, 4400.0, 3680.0, 3160.0,
// 2760.0, 2220.0, 1840.0, 1560.0, 1360.0, 1080.0, 920.0, 800.0,
// 680.0, 560.0, 440.0, 392.0, 340.0, 272.0, 228.0, 196.0,
// 172.0, 158.0, 136.0, 100.0, 88.0, 72.0, 56.0, 48.0,
// 44.0, 34.0, 28.0, 24.0, 22.0, 17.0, 14.0, 12.0
//};
static const float PLFOS_Scale[8] = { 0.f, 3.61f, 7.22f, 14.44f, 28.88f, 57.75f, 115.5f, 231.f };
static int PLFO_Scales[8][256];
#define EG_STEP_BITS (16)
#define AEG_ATTACK_SHIFT 16
//Steps per sample
static u32 AEG_ATT_SPS[64];
static u32 AEG_DSR_SPS[64];
static u32 FEG_SPS[64];
static const char* stream_names[]=
{
"0: 16-bit PCM (two's complement format)",
"1: 8-bit PCM (two's complement format)",
"2: 4-bit ADPCM (Yamaha format)",
"3: 4-bit ADPCM long stream"
};
//x.8 format
static const s32 adpcm_qs[8] =
{
0x0e6, 0x0e6, 0x0e6, 0x0e6, 0x133, 0x199, 0x200, 0x266,
};
//x.3 format
static const s32 adpcm_scale[16] =
{
1,3,5,7,9,11,13,15,
-1,-3,-5,-7,-9,-11,-13,-15,
};
static const s32 qtable[32] = {
0x0E00,0x0E80,0x0F00,0x0F80,
0x1000,0x1080,0x1100,0x1180,
0x1200,0x1280,0x1300,0x1380,
0x1400,0x1480,0x1500,0x1580,
0x1600,0x1680,0x1700,0x1780,
0x1800,0x1880,0x1900,0x1980,
0x1A00,0x1A80,0x1B00,0x1B80,
0x1C00,0x1D00,0x1E00,0x1F00
};
//Remove the fractional part by chopping..
static SampleType FPs(SampleType a, int bits) {
return a >> bits;
}
//Fixed point mul w/ rounding :)
template<typename T>
static T FPMul(T a, T b, int bits) {
return (a * b) >> bits;
}
static void VolumePan(SampleType value, u32 vol, u32 pan, SampleType& outl, SampleType& outr)
{
SampleType temp = FPMul(value, volume_lut[vol], 15);
SampleType Sc = FPMul(temp, volume_lut[0xF - (pan & 0xF)], 15);
if (pan & 0x10)
{
outl += temp;
outr += Sc;
}
else
{
outl += Sc;
outr += temp;
}
}
template<typename T>
static void clip(T& v, T min, T max) {
v = std::min(max, std::max(min, v));
}
template<typename T>
static void clip16(T& v) {
clip<T>(v, -32768, 32767);
}
const DSP_OUT_VOL_REG *dsp_out_vol = (DSP_OUT_VOL_REG *)&aica_reg[0x2000];
static int beepOn;
static int beepPeriod;
static int beepCounter;
#pragma pack(push, 1)
//All regs are 16b , aligned to 32b (upper bits 0?)
struct ChannelCommonData
{
//+00 [0]
//SA is half at reg 0 and the rest at reg 1
u32 SA_hi:7;
u32 PCMS:2;
u32 LPCTL:1;
u32 SSCTL:1;
u32 res_1:3;
u32 KYONB:1;
u32 KYONEX:1;
u32 pad_2:16;
//+04 [1]
//SA (defined above)
u32 SA_low:16;
u32 pad_3:16;
//+08 [2]
u32 LSA:16;
u32 pad_4:16;
//+0C [3]
u32 LEA:16;
u32 pad_5:16;
//+10 [4]
u32 AR:5;
u32 res_2:1;
u32 D1R:5;
u32 D2R:5;
u32 pad_7:16;
//+14 [5]
u32 RR:5;
u32 DL:5;
u32 KRS:4;
u32 LPSLNK:1;
u32 res_3:1;
u32 pad_8:16;
//+18[6]
u32 FNS:10;
u32 rez_8_1:1;
u32 OCT:4;
u32 rez_8_2:1;
u32 pad_9:16;
//+1C RE LFOF[4:0] PLFOWS PLFOS[2:0] ALFOWS ALFOS[2:0]
u32 ALFOS:3;
u32 ALFOWS:2;
u32 PLFOS:3;
u32 PLFOWS:2;
u32 LFOF:5;
u32 LFORE:1;
u32 pad_10:16;
//+20 -- IMXL[3:0] ISEL[3:0]
u32 ISEL:4;
u32 IMXL:4;
u32 rez_20_0:8;
u32 pad_11:16;
//+24 -- DISDL[3:0] -- DIPAN[4:0]
u32 DIPAN:5;
u32 rez_24_0:3;
u32 DISDL:4;
u32 rez_24_1:4;
u32 pad_12:16;
//+28 TL[7:0] -- Q[4:0]
u32 Q:5;
u32 LPOFF:1; // confirmed but not documented: 0: LPF enabled, 1: LPF disabled
u32 VOFF:1; // unconfirmed: 0: attenuation enabled, 1: attenuation disabled (TL, AEG, ALFO)
u32 rez_28_0:1;
u32 TL:8;
u32 pad_13:16;
//+2C -- FLV0[12:0]
u32 FLV0:13;
u32 rez_2C_0:3;
u32 pad_14:16;
//+30 -- FLV1[12:0]
u32 FLV1:13;
u32 rez_30_0:3;
u32 pad_15:16;
//+34 -- FLV2[12:0]
u32 FLV2:13;
u32 rez_34_0:3;
u32 pad_16:16;
//+38 -- FLV3[12:0]
u32 FLV3:13;
u32 rez_38_0:3;
u32 pad_17:16;
//+3C -- FLV4[12:0]
u32 FLV4:13;
u32 rez_3C_0:3;
u32 pad_18:16;
//+40 -- FAR[4:0] -- FD1R[4:0]
u32 FD1R:5;
u32 rez_40_0:3;
u32 FAR:5;
u32 rez_40_1:3;
u32 pad_19:16;
//+44 -- FD2R[4:0] -- FRR[4:0]
u32 FRR:5;
u32 rez_44_0:3;
u32 FD2R:5;
u32 rez_44_1:3;
u32 pad_20:16;
};
#pragma pack(pop)
enum _EG_state
{
EG_Attack = 0,
EG_Decay1 = 1,
EG_Decay2 = 2,
EG_Release = 3
};
/*
KEY_OFF->KEY_ON : Resets everything, and starts playback (EG: A)
KEY_ON->KEY_ON : nothing
KEY_ON->KEY_OFF : Switches to RELEASE state (does not disable channel)
*/
struct ChannelEx;
static void (* STREAM_STEP_LUT[5][2][2])(ChannelEx* ch);
static void (* STREAM_INITAL_STEP_LUT[5])(ChannelEx* ch);
static void (* AEG_STEP_LUT[4])(ChannelEx* ch);
static void (* FEG_STEP_LUT[4])(ChannelEx* ch);
static void (* ALFOWS_CALC[4])(ChannelEx* ch);
static void (* PLFOWS_CALC[4])(ChannelEx* ch);
struct ChannelEx
{
static ChannelEx Chans[64];
ChannelCommonData* ccd;
u8* SA;
u32 CA;
fp_22_10 step;
u32 update_rate;
SampleType s0,s1;
struct
{
u32 LSA;
u32 LEA;
u8 looped;
} loop;
struct
{
//used in adpcm decoding
s32 last_quant;
// Saved quantization and previous sample used in PCMS mode 2 (yamaha ADPCM)
s32 loopstart_quant;
SampleType loopstart_prev_sample;
bool in_loop;
void Reset(ChannelEx* ch)
{
last_quant=127;
loopstart_quant = 0;
loopstart_prev_sample = 0;
in_loop = false;
ch->s0=0;
}
} adpcm;
u32 noise_state;//for Noise generator
struct
{
u32 DLAtt;
u32 DRAtt;
u32 DSPAtt;
SampleType* DSPOut;
} VolMix;
void (* StepAEG)(ChannelEx* ch);
void (* StepFEG)(ChannelEx* ch);
void (* StepStream)(ChannelEx* ch);
void (* StepStreamInitial)(ChannelEx* ch);
struct
{
s32 val;
s32 GetValue() { return val >> EG_STEP_BITS;}
void SetValue(u32 aegb) { val = aegb << EG_STEP_BITS; }
_EG_state state=EG_Attack;
u32 AttackRate;
u32 Decay1Rate;
u32 Decay2Value;
u32 Decay2Rate;
u32 ReleaseRate;
} AEG;
struct
{
u32 value;
u32 GetValue() { return value >> EG_STEP_BITS;}
void SetValue(u32 fegb) { value = fegb << EG_STEP_BITS; }
_EG_state state = EG_Attack;
SampleType prev1;
SampleType prev2;
s32 q;
u32 AttackRate;
u32 Decay1Rate;
u32 Decay2Rate;
u32 ReleaseRate;
bool active = false;
} FEG;
struct
{
u32 counter;
u32 start_value;
u8 state;
u8 alfo;
u8 alfo_shft;
fp_22_10 plfo_step;
int *plfo_scale;
void (* alfo_calc)(ChannelEx* ch);
void (* plfo_calc)(ChannelEx* ch);
void Step(ChannelEx* ch) { counter--;if (counter==0) { state++; counter=start_value; alfo_calc(ch);plfo_calc(ch); } }
void Reset(ChannelEx* ch) { state=0; counter=start_value; alfo_calc(ch); plfo_calc(ch); }
void SetStartValue(u32 nv) { start_value = nv;}
} lfo;
bool enabled; //set to false to 'freeze' the channel
bool quiet;
int ChannelNumber;
void Init(int cn,u8* ccd_raw)
{
ccd=(ChannelCommonData*)&ccd_raw[cn*0x80];
ChannelNumber = cn;
quiet = true;
for (u32 i = 0; i < 0x80; i += 2)
RegWrite(i, 2);
quiet = false;
disable();
}
void disable()
{
enabled=false;
SetAegState(EG_Release);
AEG.SetValue(0x3FF);
}
void enable()
{
enabled=true;
}
SampleType InterpolateSample()
{
SampleType rv;
u32 fp=step.fp;
rv=FPMul(s0,(s32)(1024-fp),10);
rv+=FPMul(s1,(s32)(fp),10);
return rv;
}
bool Step(SampleType& oLeft, SampleType& oRight, SampleType& oDsp)
{
if (!enabled)
{
oLeft=oRight=oDsp=0;
return false;
}
else
{
SampleType sample = InterpolateSample();
// Low-pass filter
if (FEG.active)
{
u32 fv = FEG.GetValue();
s32 f = (((fv & 0xFF) | 0x100) << 4) >> ((fv >> 8) ^ 0x1F);
f = std::max(1, f);
sample = f * sample + (0x2000 - f + FEG.q) * FEG.prev1 - FEG.q * FEG.prev2;
sample >>= 13;
clip16(sample);
FEG.prev2 = FEG.prev1;
FEG.prev1 = sample;
}
//Volume & Mixer processing
//All attenuations are added together then applied and mixed :)
//offset is up to 511
//*Att is up to 511
//logtable handles up to 1024, anything >=255 is mute
u32 ofsatt;
if (ccd->VOFF == 1)
{
ofsatt = 0;
}
else
{
ofsatt = lfo.alfo + (AEG.GetValue() >> 2);
ofsatt = std::min(ofsatt, (u32)255); // make sure it never gets more 255 -- it can happen with some alfo/aeg combinations
}
u32 const max_att = ((16 << 4) - 1) - ofsatt;
s32* logtable = ofsatt + tl_lut;
u32 dl = std::min(VolMix.DLAtt, max_att);
u32 dr = std::min(VolMix.DRAtt, max_att);
u32 ds = std::min(VolMix.DSPAtt, max_att);
oLeft = FPMul(sample, logtable[dl], 15);
oRight = FPMul(sample, logtable[dr], 15);
oDsp = FPMul(sample, logtable[ds], 11); // 20 bits
clip_verify(((s16)oLeft)==oLeft);
clip_verify(((s16)oRight)==oRight);
clip_verify((oDsp << 12) >> 12 == oDsp);
clip_verify(sample*oLeft>=0);
clip_verify(sample*oRight>=0);
clip_verify((s64)sample*oDsp>=0);
StepAEG(this);
StepFEG(this);
StepStream(this);
lfo.Step(this);
return true;
}
}
void Step(SampleType& mixl, SampleType& mixr)
{
SampleType oLeft,oRight,oDsp;
Step(oLeft, oRight, oDsp);
*VolMix.DSPOut += oDsp;
if (oLeft + oRight == 0 && !config::DSPEnabled)
oLeft = oRight = oDsp >> 4;
mixl+=oLeft;
mixr+=oRight;
}
static void StepAll(SampleType& mixl, SampleType& mixr)
{
for (ChannelEx& channel : Chans)
channel.Step(mixl, mixr);
}
void SetAegState(_EG_state newstate)
{
StepAEG=AEG_STEP_LUT[newstate];
AEG.state=newstate;
if (newstate==EG_Release)
ccd->KYONB=0;
}
void SetFegState(_EG_state newstate)
{
StepFEG = FEG_STEP_LUT[newstate];
FEG.state = newstate;
if (newstate == EG_Attack)
{
FEG.SetValue(ccd->FLV0);
FEG.prev1 = 0;
FEG.prev2 = 0;
}
}
void KEY_ON()
{
if (AEG.state != EG_Release)
return;
//if it was off then turn it on !
enable();
// reset AEG
SetAegState(EG_Attack);
AEG.SetValue(0x280); // start value taken from HT
//reset FEG
SetFegState(EG_Attack);
//set values and crap
//Reset sampling state
CA=0;
step.full=0;
loop.looped=false;
adpcm.Reset(this);
StepStreamInitial(this);
key_printf("[%d] KEY_ON %s @ %f Hz, loop %d - AEG AR %d DC1R %d DC2V %d DC2R %d RR %d - KRS %d OCT %d FNS %d - PFLOS %d PFLOWS %d",
ChannelNumber, stream_names[ccd->PCMS], (44100.0 * update_rate) / 1024, ccd->LPCTL,
ccd->AR, ccd->D1R, ccd->DL << 5, ccd->D2R, ccd->RR,
ccd->KRS, ccd->OCT, ccd->FNS >> 9,
ccd->PLFOS, ccd->PLFOWS);
}
void KEY_OFF()
{
if (AEG.state == EG_Release)
return;
key_printf("[%d] KEY_OFF -> Release", ChannelNumber);
SetAegState(EG_Release);
SetFegState(EG_Release);
}
//PCMS,SSCTL,LPCTL,LPSLNK
void UpdateStreamStep()
{
s32 fmt=ccd->PCMS;
if (ccd->SSCTL)
fmt=4;
StepStream=STREAM_STEP_LUT[fmt][ccd->LPCTL][ccd->LPSLNK];
StepStreamInitial=STREAM_INITAL_STEP_LUT[fmt];
}
//SA,PCMS
void UpdateSA()
{
u32 addr = (ccd->SA_hi<<16) | ccd->SA_low;
if (ccd->PCMS==0)
addr&=~1; //0: 16 bit
SA=&aica_ram.data[addr];
}
//LSA,LEA
void UpdateLoop()
{
loop.LSA=ccd->LSA;
loop.LEA=ccd->LEA;
}
s32 EG_BaseRate()
{
s32 effrate = 0;
if (ccd->KRS < 0xF)
{
effrate += (ccd->FNS >> 9) & 1;
effrate += ccd->KRS * 2;
effrate += (ccd->OCT ^ 8) - 8;
}
return effrate;
}
u32 EG_EffRate(s32 base_rate, u32 rate)
{
s32 rv = base_rate + rate * 2;
clip(rv, 0, 0x3f);
return rv;
}
//D2R,D1R,AR,DL,RR,KRS, [OCT,FNS] for now
void UpdateAEG()
{
s32 base_rate = EG_BaseRate();
AEG.AttackRate = AEG_ATT_SPS[EG_EffRate(base_rate, ccd->AR)];
AEG.Decay1Rate = AEG_DSR_SPS[EG_EffRate(base_rate, ccd->D1R)];
AEG.Decay2Value = ccd->DL<<5;
AEG.Decay2Rate = AEG_DSR_SPS[EG_EffRate(base_rate, ccd->D2R)];
AEG.ReleaseRate = AEG_DSR_SPS[EG_EffRate(base_rate, ccd->RR)];
}
//OCT,FNS
void UpdatePitch()
{
u32 oct=ccd->OCT;
u32 update_rate = 1024 | ccd->FNS;
if (oct& 8)
update_rate>>=(16-oct);
else
update_rate<<=oct;
this->update_rate=update_rate;
}
//LFORE,LFOF,PLFOWS,PLFOS,ALFOWS,ALFOS
void UpdateLFO(bool derivedState)
{
{
int N=ccd->LFOF;
int S = N >> 2;
int M = (~N) & 3;
int G = 128>>S;
int L = (G-1)<<2;
int O = L + G * (M+1);
lfo.SetStartValue(O);
if (!derivedState)
lfo.counter = O;
}
lfo.alfo_shft=8-ccd->ALFOS;
lfo.alfo_calc=ALFOWS_CALC[ccd->ALFOWS];
lfo.plfo_calc=PLFOWS_CALC[ccd->PLFOWS];
lfo.plfo_scale = PLFO_Scales[ccd->PLFOS];
if (ccd->LFORE && !derivedState)
{
lfo.Reset(this);
}
else
{
lfo.alfo_calc(this);
lfo.plfo_calc(this);
}
}
//ISEL
void UpdateDSPMIX()
{
VolMix.DSPOut = &dsp::state.MIXS[ccd->ISEL];
}
//TL,DISDL,DIPAN,IMXL
void UpdateAtts()
{
u32 total_level = ccd->VOFF ? 0 : ccd->TL;
u32 attFull = total_level + SendLevel[ccd->DISDL];
u32 attPan = attFull + SendLevel[(~ccd->DIPAN) & 0xF];
//0x1* -> R decreases
if (ccd->DIPAN&0x10)
{
VolMix.DLAtt=attFull;
VolMix.DRAtt=attPan;
}
else //0x0* -> L decreases
{
VolMix.DLAtt=attPan;
VolMix.DRAtt=attFull;
}
VolMix.DSPAtt = total_level + SendLevel[ccd->IMXL];
}
//Q,FLV0,FLV1,FLV2,FLV3,FLV4,FAR,FD1R,FD2R,FRR, LPOFF
void UpdateFEG()
{
FEG.active = ccd->LPOFF == 0
&& (ccd->FLV0 < 0x1ff7 || ccd->FLV1 < 0x1ff7
|| ccd->FLV2 < 0x1ff7 || ccd->FLV3 < 0x1ff7
|| ccd->FLV4 < 0x1ff7);
if (!FEG.active)
return;
if (!quiet)
feg_printf("FEG active channel %d Q %d FLV: %05x %05x %05x %05x %05x AR %02x FD1R %02x FD2R %02x FRR %02x",
ChannelNumber, ccd->Q,
ccd->FLV0, ccd->FLV1, ccd->FLV2, ccd->FLV3, ccd->FLV4,
ccd->FAR, ccd->FD1R, ccd->FD2R, ccd->FRR);
FEG.q = qtable[ccd->Q];
s32 base_rate = EG_BaseRate();
FEG.AttackRate = FEG_SPS[EG_EffRate(base_rate, ccd->FAR)];
FEG.Decay1Rate = FEG_SPS[EG_EffRate(base_rate, ccd->FD1R)];
FEG.Decay2Rate = FEG_SPS[EG_EffRate(base_rate, ccd->FD2R)];
FEG.ReleaseRate = FEG_SPS[EG_EffRate(base_rate, ccd->FRR)];
}
void RegWrite(u32 offset, int size)
{
switch(offset)
{
case 0x00:
case 0x01:
UpdateStreamStep();
UpdateSA();
if ((offset == 0x01 || size == 2) && ccd->KYONEX)
{
ccd->KYONEX=0;
for (ChannelEx& channel : Chans)
{
if (channel.ccd->KYONB)
channel.KEY_ON();
else
channel.KEY_OFF();
}
}
break;
case 0x04:
case 0x05:
UpdateSA();
break;
case 0x08://LSA
case 0x09://LSA
case 0x0C://LEA
case 0x0D://LEA
UpdateLoop();
break;
case 0x10://D1R,AR
case 0x11://D2R,D1R
UpdateAEG();
break;
case 0x14://RR,DL
case 0x15://DL,KRS,LPSLINK
UpdateStreamStep();
UpdateAEG();
break;
case 0x18://FNS
case 0x19://FNS,OCT
UpdatePitch();
UpdateAEG();
break;
case 0x1C://ALFOS,ALFOWS,PLFOS
case 0x1D://PLFOWS,LFOF,LFORE
UpdateLFO(false);
break;
case 0x20://ISEL,IMXL
//case 0x21://nothing here !
UpdateDSPMIX();
UpdateAtts();
break;
case 0x24://DIPAN
case 0x25://DISDL
UpdateAtts();
break;
case 0x28://Q, LPOFF
case 0x29://TL
if (size == 2 || offset == 0x28)
UpdateFEG();
if (size == 2 || offset == 0x29)
UpdateAtts();
break;
case 0x2C: //FLV0
case 0x2D: //FLV0
case 0x30: //FLV1
case 0x31: //FLV1
case 0x34: //FLV2
case 0x35: //FLV2
case 0x38: //FLV3
case 0x39: //FLV3
case 0x3C: //FLV4
case 0x3D: //FLV4
case 0x40: //FD1R
case 0x41: //FAR
case 0x44: //FRR
case 0x45: //FD2R
UpdateFEG();
break;
}
}
};
static SampleType DecodeADPCM(u32 sample,s32 prev,s32& quant)
{
s32 sign=1-2*(sample/8);
u32 data=sample&7;
/*(1 - 2 * L4) * (L3 + L2/2 +L1/4 + 1/8) * quantized width (Dn) + decode value (Xn - 1) */
SampleType rv = (quant * adpcm_scale[data]) >> 3;
if (rv > 0x7FFF)
rv = 0x7FFF;
rv = sign * rv + prev;
quant = (quant * adpcm_qs[data])>>8;
clip(quant,127,24576);
clip16(rv);
return rv;
}
template<s32 PCMS,bool last>
void StepDecodeSample(ChannelEx* ch,u32 CA)
{
if (!last && PCMS<2)
return ;
s16* sptr16=(s16*)ch->SA;
s8* sptr8=(s8*)sptr16;
u8* uptr8=(u8*)sptr16;
u32 next_addr = CA + 1;
if (next_addr >= ch->loop.LEA)
next_addr = ch->loop.LSA;
SampleType s0,s1;
switch(PCMS)
{
case -1:
ch->noise_state = ch->noise_state*16807 + 0xbeef; //beef is good
s0=ch->noise_state;
s0>>=16;
s1=ch->noise_state*16807 + 0xbeef;
s1>>=16;
break;
case 0:
s0 = sptr16[CA];
s1 = sptr16[next_addr];
break;
case 1:
s0 = sptr8[CA] << 8;
s1 = sptr8[next_addr] << 8;
break;
case 2:
case 3:
{
u8 ad1 = uptr8[CA >> 1];
u8 ad2 = uptr8[next_addr >> 1];
ad1 >>= (CA & 1) * 4;
ad2 >>= (next_addr & 1) * 4;
ad1 &= 0xF;
ad2 &= 0xF;
s32 q = ch->adpcm.last_quant;
if (PCMS == 2 && CA == ch->loop.LSA)
{
if (!ch->adpcm.in_loop)
{
ch->adpcm.in_loop = true;
ch->adpcm.loopstart_quant = q;
ch->adpcm.loopstart_prev_sample = ch->s0;
}
else
{
q = ch->adpcm.loopstart_quant;
ch->s0 = ch->adpcm.loopstart_prev_sample;
}
}
s0 = DecodeADPCM(ad1, ch->s0, q);
ch->adpcm.last_quant = q;
if (last)
{
SampleType prev = s0;
if (PCMS == 2 && next_addr == ch->loop.LSA && ch->adpcm.in_loop)
{
q = ch->adpcm.loopstart_quant;
prev = ch->adpcm.loopstart_prev_sample;
}
s1 = DecodeADPCM(ad2, prev, q);
}
else
s1 = 0;
}
break;
}
ch->s0=s0;
ch->s1=s1;
}
template<s32 PCMS>
void StepDecodeSampleInitial(ChannelEx* ch)
{
StepDecodeSample<PCMS,true>(ch,0);
}
template<s32 PCMS,u32 LPCTL,u32 LPSLNK>
void StreamStep(ChannelEx* ch)
{
ch->step.full += (ch->update_rate * ch->lfo.plfo_step.full) >> 10;
fp_22_10 sp=ch->step;
ch->step.ip=0;
while(sp.ip>0)
{
sp.ip--;
u32 CA=ch->CA + 1;
u32 ca_t=CA;
if (PCMS==3)
ca_t&=~3; // in adpcm "stream" mode, LEA and LSA are supposed to be 4-sample aligned
// but some games don't respect this rule
if (LPSLNK)
{
if ((ch->AEG.state==EG_Attack) && (CA>=ch->loop.LSA))
{
step_printf("[%d]LPSLNK : Switching to EG_Decay1 %X", ch->ChannelNumber, ch->AEG.GetValue());
ch->SetAegState(EG_Decay1);
}
}
if (ca_t >= ch->loop.LEA)
{
ch->loop.looped = 1;
if (LPCTL == 0)
{
CA = 0;
ch->disable();
}
else
{
CA = ch->loop.LSA;
key_printf("[%d]LPCTL : Looping LSA %x LEA %x AEG %x", ch->ChannelNumber, ch->loop.LSA, ch->loop.LEA, ch->AEG.GetValue());
}
}
ch->CA=CA;
//keep adpcm up to date
if (sp.ip==0)
StepDecodeSample<PCMS,true>(ch,CA);
else
StepDecodeSample<PCMS,false>(ch,CA);
}
}
enum class LFOType
{
Sawtooth,
Square,
Triangle,
Random
};
template<LFOType Type>
void CalcAlfo(ChannelEx* ch)
{
u32 rv;
switch(Type)
{
case LFOType::Sawtooth:
rv=ch->lfo.state;
break;
case LFOType::Square:
rv=ch->lfo.state&0x80?255:0;
break;
case LFOType::Triangle:
rv=(ch->lfo.state&0x7f)^(ch->lfo.state&0x80 ? 0x7F:0);
rv<<=1;
break;
case LFOType::Random: // ... not so much
rv=(ch->lfo.state>>3)^(ch->lfo.state<<3)^(ch->lfo.state&0xE3);
break;
}
ch->lfo.alfo=rv>>ch->lfo.alfo_shft;
}
template<LFOType Type>
void CalcPlfo(ChannelEx* ch)
{
u32 rv;
switch(Type)
{
case LFOType::Sawtooth:
rv = ch->lfo.state;
break;
case LFOType::Square:
rv = ch->lfo.state & 0x80 ? 0xff : 0;
break;
case LFOType::Triangle:
rv = (ch->lfo.state & 0x7f) ^ (ch->lfo.state & 0x80 ? 0x7F : 0);
rv <<= 1;
break;
case LFOType::Random:
rv = (ch->lfo.state >> 3) ^ (ch->lfo.state << 3) ^ (ch->lfo.state & 0xE3);
break;
}
ch->lfo.plfo_step.full = ch->lfo.plfo_scale[(u8)rv];
}
template<u32 state>
void AegStep(ChannelEx* ch)
{
switch(state)
{
case EG_Attack:
if (ch->AEG.AttackRate != 0)
{
ch->AEG.val -= (((u64)ch->AEG.val << AEG_ATTACK_SHIFT) / ch->AEG.AttackRate) + 1;
if (ch->AEG.GetValue() <= 0)
{
if (!ch->ccd->LPSLNK)
{
aeg_printf("[%d]AEG_step : Switching to EG_Decay1", ch->ChannelNumber);
ch->SetAegState(EG_Decay1);
}
ch->AEG.SetValue(0);
}
}
break;
case EG_Decay1:
ch->AEG.val += ch->AEG.Decay1Rate;
if (((u32)ch->AEG.GetValue()) >= ch->AEG.Decay2Value)
{
aeg_printf("[%d]AEG_step : Switching to EG_Decay2", ch->ChannelNumber);
ch->SetAegState(EG_Decay2);
}
break;
case EG_Decay2:
ch->AEG.val += ch->AEG.Decay2Rate;
if (ch->AEG.GetValue() >= 0x3FF)
{
aeg_printf("[%d]AEG_step : Switching to EG_Release", ch->ChannelNumber);
ch->AEG.SetValue(0x3FF);
ch->SetAegState(EG_Release);
}
break;
case EG_Release: //only on key_off
ch->AEG.val += ch->AEG.ReleaseRate;
if (ch->AEG.GetValue() >= 0x3FF)
{
aeg_printf("[%d]AEG_step : EG_Release End @ %x", ch->ChannelNumber, ch->AEG.GetValue());
ch->AEG.SetValue(0x3FF); // TODO: mnn, should we do anything about it running wild ?
ch->disable(); // TODO: Is this ok here? It's a speed optimisation (since the channel is muted)
}
break;
}
}
template<u32 state>
void FegStep(ChannelEx* ch)
{
if (!ch->FEG.active)
return;
u32 delta;
u32 target;
switch(state)
{
case EG_Attack:
delta = ch->FEG.AttackRate;
target = ch->ccd->FLV1;
break;
case EG_Decay1:
delta = ch->FEG.Decay1Rate;
target = ch->ccd->FLV2;
break;
case EG_Decay2:
delta = ch->FEG.Decay2Rate;
target = ch->ccd->FLV3;
break;
case EG_Release:
delta = ch->FEG.ReleaseRate;
target = ch->ccd->FLV4;
break;
}
target <<= EG_STEP_BITS;
if (ch->FEG.value < target)
{
u32 maxd = target - ch->FEG.value;
if (delta > maxd)
delta = maxd;
ch->FEG.value += delta;
}
else if (ch->FEG.value > target)
{
u32 maxd = ch->FEG.value - target;
if (delta > maxd)
delta = maxd;
ch->FEG.value -= delta;
}
else if (ch->FEG.state < EG_Decay2)
{
feg_printf("[%d]FEG_step : Switching to next state: %d Freq %x", ch->ChannelNumber, (int)ch->FEG.state + 1, target >> EG_STEP_BITS);
ch->SetFegState((_EG_state)((int)ch->FEG.state + 1));
}
}
static void staticinitialise()
{
STREAM_STEP_LUT[0][0][0]=&StreamStep<0,0,0>;
STREAM_STEP_LUT[1][0][0]=&StreamStep<1,0,0>;
STREAM_STEP_LUT[2][0][0]=&StreamStep<2,0,0>;
STREAM_STEP_LUT[3][0][0]=&StreamStep<3,0,0>;
STREAM_STEP_LUT[4][0][0]=&StreamStep<-1,0,0>;
STREAM_STEP_LUT[0][0][1]=&StreamStep<0,0,1>;
STREAM_STEP_LUT[1][0][1]=&StreamStep<1,0,1>;
STREAM_STEP_LUT[2][0][1]=&StreamStep<2,0,1>;
STREAM_STEP_LUT[3][0][1]=&StreamStep<3,0,1>;
STREAM_STEP_LUT[4][0][1]=&StreamStep<-1,0,1>;
STREAM_STEP_LUT[0][1][0]=&StreamStep<0,1,0>;
STREAM_STEP_LUT[1][1][0]=&StreamStep<1,1,0>;
STREAM_STEP_LUT[2][1][0]=&StreamStep<2,1,0>;
STREAM_STEP_LUT[3][1][0]=&StreamStep<3,1,0>;
STREAM_STEP_LUT[4][1][0]=&StreamStep<-1,1,0>;
STREAM_STEP_LUT[0][1][1]=&StreamStep<0,1,1>;
STREAM_STEP_LUT[1][1][1]=&StreamStep<1,1,1>;
STREAM_STEP_LUT[2][1][1]=&StreamStep<2,1,1>;
STREAM_STEP_LUT[3][1][1]=&StreamStep<3,1,1>;
STREAM_STEP_LUT[4][1][1]=&StreamStep<-1,1,1>;
STREAM_INITAL_STEP_LUT[0]=&StepDecodeSampleInitial<0>;
STREAM_INITAL_STEP_LUT[1]=&StepDecodeSampleInitial<1>;
STREAM_INITAL_STEP_LUT[2]=&StepDecodeSampleInitial<2>;
STREAM_INITAL_STEP_LUT[3]=&StepDecodeSampleInitial<3>;
STREAM_INITAL_STEP_LUT[4]=&StepDecodeSampleInitial<-1>;
AEG_STEP_LUT[EG_Attack] = &AegStep<EG_Attack>;
AEG_STEP_LUT[EG_Decay1] = &AegStep<EG_Decay1>;
AEG_STEP_LUT[EG_Decay2] = &AegStep<EG_Decay2>;
AEG_STEP_LUT[EG_Release] = &AegStep<EG_Release>;
FEG_STEP_LUT[EG_Attack] = &FegStep<EG_Attack>;
FEG_STEP_LUT[EG_Decay1] = &FegStep<EG_Decay1>;
FEG_STEP_LUT[EG_Decay2] = &FegStep<EG_Decay2>;
FEG_STEP_LUT[EG_Release] = &FegStep<EG_Release>;
ALFOWS_CALC[(int)LFOType::Sawtooth] = &CalcAlfo<LFOType::Sawtooth>;
ALFOWS_CALC[(int)LFOType::Square] = &CalcAlfo<LFOType::Square>;
ALFOWS_CALC[(int)LFOType::Triangle] = &CalcAlfo<LFOType::Triangle>;
ALFOWS_CALC[(int)LFOType::Random] = &CalcAlfo<LFOType::Random>;
PLFOWS_CALC[(int)LFOType::Sawtooth] = &CalcPlfo<LFOType::Sawtooth>;
PLFOWS_CALC[(int)LFOType::Square] = &CalcPlfo<LFOType::Square>;
PLFOWS_CALC[(int)LFOType::Triangle] = &CalcPlfo<LFOType::Triangle>;
PLFOWS_CALC[(int)LFOType::Random] = &CalcPlfo<LFOType::Random>;
}
ChannelEx ChannelEx::Chans[64];
#define Chans ChannelEx::Chans
static u32 CalcEgSteps(float t)
{
const double eg_allsteps = 1024 * (1 << EG_STEP_BITS) - 1;
if (t < 0)
return 0;
if (t == 0)
return (u32)eg_allsteps;
//44.1*ms = samples
double scnt = 44.1 * t;
double steps = eg_allsteps / scnt;
return (u32)lround(steps);
}
static u32 CalcAttackEgSteps(float t)
{
if (t < 0)
return 0;
if (t == 0)
return 1 << AEG_ATTACK_SHIFT;
//44.1*ms = samples
double scnt = 44.1 * t;
double factor = (1.0 / (1.0 - 1.0 / pow(0x280, 1.0 / scnt))) * (1 << AEG_ATTACK_SHIFT);
return (u32)lround(factor);
}
void sgc_Init()
{
staticinitialise();
for (int i = 0; i < 16; i++)
{
volume_lut[i]=(s32)((1<<15)/pow(2.0,(15-i)/2.0));
if (i==0)
volume_lut[i]=0;
}
for (int i = 0; i < 256; i++)
tl_lut[i]=(s32)((1<<15)/pow(2.0,i/16.0));
//tl entries 256 to 1023 are 0
for (int i=256;i<1024;i++)
tl_lut[i]=0;
for (int i=0;i<64;i++)
{
AEG_ATT_SPS[i] = CalcAttackEgSteps(AEG_Attack_Time[i]);
AEG_DSR_SPS[i]=CalcEgSteps(AEG_DSR_Time[i]);
FEG_SPS[i] = CalcEgSteps(AEG_DSR_Time[i]);
//FEG_SPS[i] = CalcEgSteps(FEG_Time[i]);
}
for (int i=0;i<64;i++)
Chans[i].Init(i,aica_reg);
for (int s = 0; s < 8; s++)
{
float limit = PLFOS_Scale[s];
for (int i = -128; i < 128; i++)
PLFO_Scales[s][i + 128] = (u32)((1 << 10) * powf(2.0f, limit * i / 128.0f / 1200.0f));
}
beepOn = 0;
beepPeriod = 0;
beepCounter = 0;
dsp::init();
}
void sgc_Term()
{
dsp::term();
}
void WriteChannelReg(u32 channel, u32 reg, int size)
{
Chans[channel].RegWrite(reg, size);
}
void ReadCommonReg(u32 reg,bool byte)
{
switch(reg)
{
case 0x2808:
case 0x2809:
if (!midiSendBuffer.empty())
{
if (!byte || reg == 0x2808)
{
CommonData->MIBUF = midiSendBuffer.front();
midiSendBuffer.pop_front();
}
CommonData->MIEMP = 0;
CommonData->MIFUL = 1;
}
else
{
CommonData->MIEMP = 1;
CommonData->MIFUL = 0;
}
CommonData->MIOVF = 0;
CommonData->MOEMP = 1;
CommonData->MOFUL = 0;
break;
case 0x2810: // EG, SGC, LP
case 0x2811:
{
u32 chan=CommonData->MSLC;
CommonData->LP=Chans[chan].loop.looped;
verify(CommonData->AFSEL == 0);
s32 aeg = Chans[chan].AEG.GetValue();
if (aeg > 0x3BF)
CommonData->EG = 0x1FFF;
else
CommonData->EG = aeg; //AEG is only 10 bits, FEG is 13 bits
CommonData->SGC=Chans[chan].AEG.state;
if (! (byte && reg==0x2810))
Chans[chan].loop.looped=0;
}
break;
case 0x2814: //CA
case 0x2815: //CA
{
u32 chan=CommonData->MSLC;
CommonData->CA = Chans[chan].CA;
//printf("[%d] CA read %d\n",chan,Chans[chan].CA);
}
break;
}
}
void vmuBeep(int on, int period)
{
if (on == 0 || period == 0 || on < period)
{
beepOn = 0;
beepPeriod = 0;
}
else
{
// The maple doc may be wrong on this. It looks like the raw values of T1LR and T1LC are set.
// So the period is (256 - T1LR) / (32768 / 6)
// and the duty cycle is (T1LC - T1LR) / (32768 / 6)
beepOn = (on - period) * 8;
beepPeriod = (256 - period) * 8;
beepCounter = 0;
}
}
static SampleType vmuBeepSample()
{
if (beepPeriod == 0)
return 0;
SampleType s;
if (beepCounter <= beepOn)
s = 16383;
else
s = -16384;
beepCounter = (beepCounter + 1) % beepPeriod;
return s;
}
constexpr int CDDA_SIZE = 2352 / 2;
static s16 cdda_sector[CDDA_SIZE];
static u32 cdda_index = CDDA_SIZE;
void AICA_Sample()
{
SampleType mixl,mixr;
mixl = 0;
mixr = 0;
memset(dsp::state.MIXS, 0, sizeof(dsp::state.MIXS));
ChannelEx::StepAll(mixl,mixr);
//OK , generated all Channels , now DSP/ect + final mix ;p
//CDDA EXTS input
if (cdda_index>=CDDA_SIZE)
{
cdda_index=0;
libCore_CDDA_Sector(cdda_sector);
}
s32 EXTS0L=cdda_sector[cdda_index];
s32 EXTS0R=cdda_sector[cdda_index+1];
cdda_index+=2;
//Final MIX ..
//Add CDDA / DSP effect(s)
//CDDA
VolumePan(EXTS0L, dsp_out_vol[16].EFSDL, dsp_out_vol[16].EFPAN, mixl, mixr);
VolumePan(EXTS0R, dsp_out_vol[17].EFSDL, dsp_out_vol[17].EFPAN, mixl, mixr);
DSPData->EXTS[0] = EXTS0L;
DSPData->EXTS[1] = EXTS0R;
if (config::DSPEnabled)
{
dsp::step();
for (int i=0;i<16;i++)
VolumePan(*(s16*)&DSPData->EFREG[i], dsp_out_vol[i].EFSDL, dsp_out_vol[i].EFPAN, mixl, mixr);
}
if (settings.input.fastForwardMode || settings.aica.muteAudio)
return;
SampleType beep = vmuBeepSample();
mixl += beep;
mixr += beep;
//Mono !
if (CommonData->Mono)
{
//Yay for mono =P
mixl+=mixr;
mixr=mixl;
}
//MVOL !
//we want to make sure mix* is *At least* 23 bits wide here, so 64 bit mul !
u32 mvol=CommonData->MVOL;
s32 val=volume_lut[mvol];
mixl = (s32)FPMul<s64>(mixl, val, 15);
mixr = (s32)FPMul<s64>(mixr, val, 15);
if (CommonData->DAC18B)
{
//If 18 bit output , make it 16b :p
mixl=FPs(mixl,2);
mixr=FPs(mixr,2);
}
//Sample is ready ! clip/saturate and store :}
#ifdef CLIP_WARN
if (((s16)mixl) != mixl || ((s16)mixr) != mixr)
printf("Clipped mixl %d mixr %d\n", mixl, mixr);
#endif
clip16(mixl);
clip16(mixr);
WriteSample(mixr,mixl);
}
void channel_serialize(Serializer& ser)
{
for (const ChannelEx& channel : Chans)
{
u32 addr = channel.SA - &aica_ram[0];
ser << addr;
ser << channel.CA;
ser << channel.step;
ser << channel.s0;
ser << channel.s1;
ser << channel.loop.looped;
ser << channel.adpcm.last_quant;
ser << channel.adpcm.loopstart_quant;
ser << channel.adpcm.loopstart_prev_sample;
ser << channel.adpcm.in_loop;
ser << channel.noise_state;
ser << channel.AEG.val;
ser << channel.AEG.state;
ser << channel.FEG.value;
ser << channel.FEG.state;
ser << channel.FEG.prev1;
ser << channel.FEG.prev2;
ser << channel.lfo.counter;
ser << channel.lfo.state;
ser << channel.enabled;
}
ser << beepOn;
ser << beepPeriod;
ser << beepCounter;
ser << cdda_sector;
ser << cdda_index;
ser << (u32)midiSendBuffer.size();
for (u8 b : midiSendBuffer)
ser << b;
}
void channel_deserialize(Deserializer& deser)
{
if (deser.version() < Deserializer::V7_LIBRETRO)
{
deser.skip(4 * 16); // volume_lut
deser.skip(4 * 256 + 768); // tl_lut. Due to a previous bug this is not 4 * (256 + 768)
deser.skip(4 * 64); // AEG_ATT_SPS
deser.skip(4 * 64); // AEG_DSR_SPS
deser.skip(2); // pl
deser.skip(2); // pr
}
bool old_format = (deser.version() >= Deserializer::V5 && deser.version() < Deserializer::V7) || deser.version() < Deserializer::V8_LIBRETRO;
for (ChannelEx& channel : Chans)
{
channel.quiet = true;
u32 addr;
deser >> addr;
channel.SA = addr + &aica_ram[0];
deser >> channel.CA;
deser >> channel.step;
if (old_format)
deser.skip<u32>(); // channel.update_rate
channel.UpdatePitch();
deser >> channel.s0;
deser >> channel.s1;
deser >> channel.loop.looped;
if (old_format)
{
deser.skip<u32>(); // channel.loop.LSA
deser.skip<u32>(); // channel.loop.LEA
}
channel.UpdateLoop();
deser >> channel.adpcm.last_quant;
if (!old_format)
{
deser >> channel.adpcm.loopstart_quant;
deser >> channel.adpcm.loopstart_prev_sample;
deser >> channel.adpcm.in_loop;
}
else
{
channel.adpcm.in_loop = true;
channel.adpcm.loopstart_quant = 0;
channel.adpcm.loopstart_prev_sample = 0;
}
deser >> channel.noise_state;
if (old_format)
{
deser.skip<u32>(); // channel.VolMix.DLAtt
deser.skip<u32>(); // channel.VolMix.DRAtt
deser.skip<u32>(); // channel.VolMix.DSPAtt
}
channel.UpdateAtts();
if (old_format)
deser.skip<u32>(); // channel.VolMix.DSPOut
channel.UpdateDSPMIX();
deser >> channel.AEG.val;
deser >> channel.AEG.state;
channel.SetAegState(channel.AEG.state);
if (old_format)
{
deser.skip<u32>(); // channel.AEG.AttackRate
deser.skip<u32>(); // channel.AEG.Decay1Rate
deser.skip<u32>(); // channel.AEG.Decay2Rate
deser.skip<u32>(); // channel.AEG.Decay2Value
deser.skip<u32>(); // channel.AEG.ReleaseRate
}
channel.UpdateAEG();
deser >> channel.FEG.value;
deser >> channel.FEG.state;
if (!old_format)
{
deser >> channel.FEG.prev1;
deser >> channel.FEG.prev2;
}
else
{
channel.FEG.prev1 = 0;
channel.FEG.prev2 = 0;
}
channel.SetFegState(channel.FEG.state);
channel.UpdateFEG();
if (old_format)
{
deser.skip<u8>(); // channel.step_stream_lut1
deser.skip<u8>(); // channel.step_stream_lut2
deser.skip<u8>(); // channel.step_stream_lut3
}
channel.UpdateStreamStep();
deser >> channel.lfo.counter;
if (old_format)
deser.skip<u32>(); // channel.lfo.start_value
deser >> channel.lfo.state;
if (old_format)
{
deser.skip<u8>(); // channel.lfo.alfo
deser.skip<u8>(); // channel.lfo.alfo_shft
deser.skip<u8>(); // channel.lfo.plfo
deser.skip<u8>(); // channel.lfo.plfo_shft
deser.skip<u8>(); // channel.lfo.alfo_calc_lut
deser.skip<u8>(); // channel.lfo.plfo_calc_lut
}
channel.UpdateLFO(true);
deser >> channel.enabled;
if (old_format)
deser.skip<u32>(); // channel.ChannelNumber
channel.quiet = false;
}
if (deser.version() >= Deserializer::V22)
{
deser >> beepOn;
deser >> beepPeriod;
deser >> beepCounter;
}
else
{
beepOn = 0;
beepPeriod = 0;
beepCounter = 0;
}
deser >> cdda_sector;
deser >> cdda_index;
if (deser.version() < Deserializer::V9_LIBRETRO)
{
deser.skip(4 * 64); // mxlr
deser.skip(4); // samples_gen
}
midiSendBuffer.clear();
if (deser.version() >= Deserializer::V28)
{
u32 size;
deser >> size;
for (u32 i = 0; i < size; i++)
{
u8 b;
deser >> b;
midiSendBuffer.push_back(b);
}
}
}
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