/*
Copyright (C) 2006 yopyop
Copyright (C) 2006 Theo Berkau
Copyright (C) 2008-2012 DeSmuME team
Ideas borrowed from Stephane Dallongeville's SCSP core
This file 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 file 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 the this software. If not, see <http://www.gnu.org/licenses/>.
*/
#include "XSFCommon.h"
#include <queue>
#include <vector>
#include <cstdlib>
#include <cstring>
#ifndef M_PI
static const double M_PI = 3.14159265358979323846;
#endif
#include "MMU.h"
#include "SPU.h"
#include "mem.h"
#include "readwrite.h"
#include "armcpu.h"
#include "NDSSystem.h"
#include "matrix.h"
static inline int16_t read16(uint32_t addr) { return _MMU_read16<ARMCPU_ARM7,MMU_AT_DEBUG>(addr); }
static inline uint8_t read08(uint32_t addr) { return _MMU_read08<ARMCPU_ARM7,MMU_AT_DEBUG>(addr); }
static inline int8_t read_s8(uint32_t addr) { return _MMU_read08<ARMCPU_ARM7,MMU_AT_DEBUG>(addr); }
static const int K_ADPCM_LOOPING_RECOVERY_INDEX = 99999;
static const int COSINE_INTERPOLATION_RESOLUTION = 8192;
static auto synchronizer = std::unique_ptr<ISynchronizingAudioBuffer>(metaspu_construct(ESynchMethod_N));
std::unique_ptr<SPU_struct> SPU_core, SPU_user;
int SPU_currentCoreNum = SNDCORE_DUMMY;
static int volume = 100;
static size_t buffersize = 0;
static ESynchMode synchmode = ESynchMode_DualSynchAsynch;
static ESynchMethod synchmethod = ESynchMethod_N;
static int SNDCoreId = -1;
static SoundInterface_struct *SNDCore = nullptr;
extern SoundInterface_struct *SNDCoreList[];
static const int format_shift[] = { 2, 1, 3, 0 };
static const int8_t indextbl[8] =
{
-1, -1, -1, -1, 2, 4, 6, 8
};
static const uint16_t adpcmtbl[89] =
{
0x0007, 0x0008, 0x0009, 0x000A, 0x000B, 0x000C, 0x000D, 0x000E, 0x0010,
0x0011, 0x0013, 0x0015, 0x0017, 0x0019, 0x001C, 0x001F, 0x0022, 0x0025,
0x0029, 0x002D, 0x0032, 0x0037, 0x003C, 0x0042, 0x0049, 0x0050, 0x0058,
0x0061, 0x006B, 0x0076, 0x0082, 0x008F, 0x009D, 0x00AD, 0x00BE, 0x00D1,
0x00E6, 0x00FD, 0x0117, 0x0133, 0x0151, 0x0173, 0x0198, 0x01C1, 0x01EE,
0x0220, 0x0256, 0x0292, 0x02D4, 0x031C, 0x036C, 0x03C3, 0x0424, 0x048E,
0x0502, 0x0583, 0x0610, 0x06AB, 0x0756, 0x0812, 0x08E0, 0x09C3, 0x0ABD,
0x0BD0, 0x0CFF, 0x0E4C, 0x0FBA, 0x114C, 0x1307, 0x14EE, 0x1706, 0x1954,
0x1BDC, 0x1EA5, 0x21B6, 0x2515, 0x28CA, 0x2CDF, 0x315B, 0x364B, 0x3BB9,
0x41B2, 0x4844, 0x4F7E, 0x5771, 0x602F, 0x69CE, 0x7462, 0x7FFF
};
static const int16_t wavedutytbl[8][8] = {
{ -0x7FFF, -0x7FFF, -0x7FFF, -0x7FFF, -0x7FFF, -0x7FFF, -0x7FFF, 0x7FFF },
{ -0x7FFF, -0x7FFF, -0x7FFF, -0x7FFF, -0x7FFF, -0x7FFF, 0x7FFF, 0x7FFF },
{ -0x7FFF, -0x7FFF, -0x7FFF, -0x7FFF, -0x7FFF, 0x7FFF, 0x7FFF, 0x7FFF },
{ -0x7FFF, -0x7FFF, -0x7FFF, -0x7FFF, 0x7FFF, 0x7FFF, 0x7FFF, 0x7FFF },
{ -0x7FFF, -0x7FFF, -0x7FFF, 0x7FFF, 0x7FFF, 0x7FFF, 0x7FFF, 0x7FFF },
{ -0x7FFF, -0x7FFF, 0x7FFF, 0x7FFF, 0x7FFF, 0x7FFF, 0x7FFF, 0x7FFF },
{ -0x7FFF, 0x7FFF, 0x7FFF, 0x7FFF, 0x7FFF, 0x7FFF, 0x7FFF, 0x7FFF },
{ -0x7FFF, -0x7FFF, -0x7FFF, -0x7FFF, -0x7FFF, -0x7FFF, -0x7FFF, -0x7FFF }
};
static int32_t precalcdifftbl[89][16];
static uint8_t precalcindextbl[89][8];
static double cos_lut[COSINE_INTERPOLATION_RESOLUTION];
static const double ARM7_CLOCK = 33513982;
static const double samples_per_hline = (DESMUME_SAMPLE_RATE / 59.8261f) / 263.0f;
static double samples = 0;
template<typename T> static inline T MinMax(T val, T min, T max)
{
if (val < min)
return min;
else if (val > max)
return max;
else
return val;
}
//--------------external spu interface---------------
int SPU_ChangeSoundCore(int coreid, int Buffersize)
{
buffersize = Buffersize;
SPU_user.reset();
// Make sure the old core is freed
if (SNDCore)
SNDCore->DeInit();
// So which core do we want?
if (coreid == SNDCORE_DEFAULT)
coreid = 0; // Assume we want the first one
SPU_currentCoreNum = coreid;
// Go through core list and find the id
for (int i = 0; SNDCoreList[i]; ++i)
if (SNDCoreList[i]->id == coreid)
{
// Set to current core
SNDCore = SNDCoreList[i];
break;
}
SNDCoreId = coreid;
// If the user picked the dummy core, disable the user spu
if (SNDCore == &SNDDummy)
return 0;
// If the core wasnt found in the list for some reason, disable the user spu
if (!SNDCore)
return -1;
// Since it failed, instead of it being fatal, disable the user spu
if (SNDCore->Init(buffersize * 2) == -1)
{
SNDCore = nullptr;
return -1;
}
SNDCore->SetVolume(volume);
SPU_SetSynchMode(synchmode, synchmethod);
return 0;
}
void SPU_ReInit()
{
SPU_Init(SNDCoreId, buffersize);
}
int SPU_Init(int coreid, int Buffersize)
{
// Build the cosine interpolation LUT
int i;
for (i = 0; i < COSINE_INTERPOLATION_RESOLUTION; ++i)
cos_lut[i] = (1.0 - std::cos((static_cast<double>(i) / COSINE_INTERPOLATION_RESOLUTION) * M_PI)) * 0.5;
SPU_core.reset(new SPU_struct(std::ceil(samples_per_hline)));
SPU_Reset();
int j;
// create adpcm decode accelerator lookups
for (i = 0; i < 16; ++i)
for (j = 0; j < 89; ++j)
{
precalcdifftbl[j][i] = ((i & 0x7) * 2 + 1) * adpcmtbl[j] / 8;
if (i & 0x8)
precalcdifftbl[j][i] = -precalcdifftbl[j][i];
}
for (i = 0; i < 8; ++i)
for (j = 0; j < 89; ++j)
precalcindextbl[j][i] = MinMax(j + indextbl[i], 0, 88);
return SPU_ChangeSoundCore(coreid, Buffersize);
}
void SPU_CloneUser()
{
if (SPU_user)
{
memcpy(SPU_user->channels, SPU_core->channels, sizeof(SPU_core->channels));
SPU_user->regs = SPU_core->regs;
}
}
void SPU_SetSynchMode(ESynchMode mode, ESynchMethod method)
{
synchmode = mode;
if (synchmethod != method)
{
synchmethod = method;
// grr does this need to be locked? spu might need a lock method
// or maybe not, maybe the platform-specific code that calls this function can deal with it.
synchronizer.reset(metaspu_construct(synchmethod));
}
SPU_user.reset();
if (synchmode == ESynchMode_DualSynchAsynch)
{
SPU_user.reset(new SPU_struct(buffersize));
SPU_CloneUser();
}
}
void SPU_Reset()
{
SPU_core->reset();
if (SPU_user)
{
if (SNDCore)
{
SNDCore->DeInit();
SNDCore->Init(SPU_user->bufsize * 2);
SNDCore->SetVolume(volume);
}
SPU_user->reset();
}
// zero - 09-apr-2010: this concerns me, regarding savestate synch.
// After 0.9.6, lets experiment with removing it and just properly zapping the spu instead
// Reset Registers
for (int i = 0x400; i < 0x51D; ++i)
T1WriteByte(MMU.ARM7_REG, i, 0);
samples = 0;
}
//------------------------------------------
void SPU_struct::reset()
{
memset(&this->sndbuf[0], 0, bufsize * 2 * 4);
memset(&this->outbuf[0], 0, bufsize * 2 * 2);
memset(this->channels, 0, sizeof(channel_struct) * 16);
reconstruct(&this->regs);
for (int i = 0; i < 16; ++i)
this->channels[i].num = i;
}
SPU_struct::SPU_struct(int Buffersize) : bufpos(0), buflength(0), sndbuf(new int32_t[Buffersize * 2]), outbuf(new int16_t[Buffersize * 2]), bufsize(Buffersize)
{
this->reset();
}
void SPU_DeInit()
{
if (SNDCore)
SNDCore->DeInit();
SNDCore = nullptr;
SPU_core.reset();
SPU_user.reset();
}
//////////////////////////////////////////////////////////////////////////////
void SPU_struct::ShutUp()
{
for (int i = 0; i < 16; ++i)
this->channels[i].status = CHANSTAT_STOPPED;
}
static inline void adjust_channel_timer(channel_struct *chan)
{
chan->sampinc = (ARM7_CLOCK / (DESMUME_SAMPLE_RATE * 2)) / (0x10000 - chan->timer);
}
void SPU_struct::KeyProbe(int chan_num)
{
channel_struct &thischan = this->channels[chan_num];
if (thischan.status == CHANSTAT_STOPPED)
{
if (thischan.keyon && this->regs.masteren)
this->KeyOn(chan_num);
}
else if (thischan.status == CHANSTAT_PLAY)
{
if (!thischan.keyon || !this->regs.masteren)
this->KeyOff(chan_num);
}
}
void SPU_struct::KeyOff(int channel)
{
//printf("keyoff%d\n",channel);
channel_struct &thischan = this->channels[channel];
thischan.status = CHANSTAT_STOPPED;
}
void SPU_struct::KeyOn(int channel)
{
channel_struct &thischan = this->channels[channel];
thischan.status = CHANSTAT_PLAY;
thischan.totlength = thischan.length + thischan.loopstart;
adjust_channel_timer(&thischan);
//printf("keyon %d totlength:%d\n",channel,thischan.totlength);
//LOG("Channel %d key on: vol = %d, datashift = %d, hold = %d, pan = %d, waveduty = %d, repeat = %d, format = %d, source address = %07X,"
// "timer = %04X, loop start = %04X, length = %06X, MMU.ARM7_REG[0x501] = %02X\n", channel, chan->vol, chan->datashift, chan->hold,
// chan->pan, chan->waveduty, chan->repeat, chan->format, chan->addr, chan->timer, chan->loopstart, chan->length, T1ReadByte(MMU.ARM7_REG, 0x501));
switch (thischan.format)
{
case 0: // 8-bit
//hischan.loopstart = thischan.loopstart << 2;
//hischan.length = (thischan.length << 2) + thischan.loopstart;
thischan.sampcnt = -3;
break;
case 1: // 16-bit
//thischan.loopstart = thischan.loopstart << 1;
//thischan.length = (thischan.length << 1) + thischan.loopstart;
thischan.sampcnt = -3;
break;
case 2: // ADPCM
thischan.pcm16b = read16(thischan.addr);
thischan.pcm16b_last = thischan.pcm16b;
thischan.index = read08(thischan.addr + 2) & 0x7F;
thischan.lastsampcnt = 7;
thischan.sampcnt = -3;
thischan.loop_index = K_ADPCM_LOOPING_RECOVERY_INDEX;
//thischan.loopstart = thischan.loopstart << 3;
//hischan.length = (thischan.length << 3) + thischan.loopstart;
break;
case 3: // PSG
thischan.sampcnt = -1;
thischan.x = 0x7FFF;
}
thischan.double_totlength_shifted = thischan.totlength << format_shift[thischan.format];
if (thischan.format != 3 && fEqual(thischan.double_totlength_shifted, 0.0))
{
printf("INFO: Stopping channel %d due to zero length\n", channel);
thischan.status = CHANSTAT_STOPPED;
}
}
//////////////////////////////////////////////////////////////////////////////
template<typename T> static inline void SETBYTE(uint32_t which, T &oldval, uint8_t newval) { oldval = (oldval & (~(0xFF << (which * 8)))) | (newval << (which * 8)); }
static inline uint8_t GETBYTE(uint32_t which, uint32_t val) { return (val >> (which * 8)) & 0xFF; }
uint8_t SPU_ReadByte(uint32_t addr)
{
addr &= 0xFFF;
return SPU_core->ReadByte(addr);
}
uint16_t SPU_ReadWord(uint32_t addr)
{
addr &= 0xFFF;
return SPU_core->ReadWord(addr);
}
uint32_t SPU_ReadLong(uint32_t addr)
{
addr &= 0xFFF;
return SPU_core->ReadLong(addr);
}
uint16_t SPU_struct::ReadWord(uint32_t addr)
{
return this->ReadByte(addr) | (this->ReadByte(addr + 1) << 8);
}
uint32_t SPU_struct::ReadLong(uint32_t addr)
{
return this->ReadByte(addr) | (this->ReadByte(addr + 1) << 8) | (this->ReadByte(addr + 2) << 16) | (ReadByte(addr + 3) << 24);
}
uint8_t SPU_struct::ReadByte(uint32_t addr)
{
switch (addr)
{
// SOUNDCNT
case 0x500:
return this->regs.mastervol;
case 0x501:
return this->regs.ctl_left | (this->regs.ctl_right << 2) | (this->regs.ctl_ch1bypass << 4) | (this->regs.ctl_ch3bypass << 5) | (this->regs.masteren << 7);
case 0x502:
case 0x503:
return 0;
// SOUNDBIAS
case 0x504:
return this->regs.soundbias & 0xFF;
case 0x505:
return (this->regs.soundbias >> 8) & 0xFF;
case 0x506:
case 0x507:
return 0;
// SNDCAP0CNT/SNDCAP1CNT
case 0x508:
case 0x509:
{
uint32_t which = addr - 0x508;
return this->regs.cap[which].add | (this->regs.cap[which].source << 1) | (this->regs.cap[which].oneshot << 2) | (this->regs.cap[which].bits8 << 3)
//| (regs.cap[which].active<<7); //? which is right? need test
| (this->regs.cap[which].runtime.running << 7);
}
// SNDCAP0DAD
case 0x510:
return GETBYTE(0, this->regs.cap[0].dad);
case 0x511:
return GETBYTE(1, this->regs.cap[0].dad);
case 0x512:
return GETBYTE(2, this->regs.cap[0].dad);
case 0x513:
return GETBYTE(3, this->regs.cap[0].dad);
// SNDCAP0LEN
case 0x514:
return GETBYTE(0, this->regs.cap[0].len);
case 0x515:
return GETBYTE(1, this->regs.cap[0].len);
case 0x516:
case 0x517:
return 0; //not used
// SNDCAP1DAD
case 0x518:
return GETBYTE(0, this->regs.cap[1].dad);
case 0x519:
return GETBYTE(1, this->regs.cap[1].dad);
case 0x51A:
return GETBYTE(2, this->regs.cap[1].dad);
case 0x51B:
return GETBYTE(3, this->regs.cap[1].dad);
// SNDCAP1LEN
case 0x51C:
return GETBYTE(0, this->regs.cap[1].len);
case 0x51D:
return GETBYTE(1, this->regs.cap[1].len);
case 0x51E:
case 0x51F:
return 0; //not used
default:
{
// individual channel regs
uint32_t chan_num = (addr >> 4) & 0xF;
if (chan_num > 0xF)
return 0;
channel_struct &thischan = this->channels[chan_num];
switch (addr & 0xF)
{
case 0x0:
return thischan.vol;
case 0x1:
{
uint8_t ret = thischan.datashift;
if (ret == 4)
ret = 3;
ret |= thischan.hold << 7;
return ret;
}
case 0x2:
return thischan.pan;
case 0x3:
return thischan.waveduty | (thischan.repeat << 3) | (thischan.format << 5) | (thischan.status == CHANSTAT_PLAY ? 0x80 : 0);
case 0x4:
return 0; //return GETBYTE(0, thischan.addr); //not readable
case 0x5:
return 0; //return GETBYTE(1, thischan.addr); //not readable
case 0x6:
return 0; //return GETBYTE(2, thischan.addr); //not readable
case 0x7:
return 0; //return GETBYTE(3, thischan.addr); //not readable
case 0x8:
return GETBYTE(0, thischan.timer);
case 0x9:
return GETBYTE(1, thischan.timer);
case 0xA:
return GETBYTE(0, thischan.loopstart);
case 0xB:
return GETBYTE(1, thischan.loopstart);
case 0xC:
return 0; //return GETBYTE(0, thischan.length); //not readable
case 0xD:
return 0; //return GETBYTE(1, thischan.length); //not readable
case 0xE:
return 0; //return GETBYTE(2, thischan.length); //not readable
case 0xF:
return 0; //return GETBYTE(3, thischan.length); //not readable
default:
return 0; //impossible
} // switch on individual channel regs
} // default case
} // switch on address
}
SPUFifo::SPUFifo()
{
this->reset();
}
void SPUFifo::reset()
{
this->head = this->tail = this->size = 0;
}
void SPUFifo::enqueue(int16_t val)
{
if (this->size == 16)
return;
this->buffer[this->tail] = val;
++this->tail;
this->tail &= 15;
++this->size;
}
int16_t SPUFifo::dequeue()
{
if (!this->size)
return 0;
++this->head;
this->head &= 15;
int16_t ret = this->buffer[this->head];
--this->size;
return ret;
}
void SPU_struct::ProbeCapture(int which)
{
// VERY UNTESTED -- HOW MUCH OF THIS RESETS, AND WHEN?
if (!this->regs.cap[which].active)
{
this->regs.cap[which].runtime.running = 0;
return;
}
REGS::CAP &cap = this->regs.cap[which];
cap.runtime.running = 1;
cap.runtime.curdad = cap.dad;
uint32_t len = cap.len;
if (!len)
len = 1;
cap.runtime.maxdad = cap.dad + len * 4;
cap.runtime.sampcnt = 0;
cap.runtime.fifo.reset();
}
void SPU_struct::WriteByte(uint32_t addr, uint8_t val)
{
switch (addr)
{
// SOUNDCNT
case 0x500:
this->regs.mastervol = val & 0x7F;
break;
case 0x501:
this->regs.ctl_left = val & 3;
this->regs.ctl_right = (val >> 2) & 3;
this->regs.ctl_ch1bypass = (val >> 4) & 1;
this->regs.ctl_ch3bypass = (val >> 5) & 1;
this->regs.masteren = (val >> 7) & 1;
for (int i = 0; i < 16; ++i)
this->KeyProbe(i);
break;
case 0x502:
case 0x503:
break; // not used
// SOUNDBIAS
case 0x504:
SETBYTE(0, this->regs.soundbias, val);
break;
case 0x505:
SETBYTE(1, this->regs.soundbias, val & 3);
break;
case 0x506:
case 0x507:
break; // these dont answer anyway
// SNDCAP0CNT/SNDCAP1CNT
case 0x508:
case 0x509:
{
uint32_t which = addr - 0x508;
this->regs.cap[which].add = static_cast<uint8_t>(BIT0(val));
this->regs.cap[which].source = static_cast<uint8_t>(BIT1(val));
this->regs.cap[which].oneshot = static_cast<uint8_t>(BIT2(val));
this->regs.cap[which].bits8 = static_cast<uint8_t>(BIT3(val));
this->regs.cap[which].active = static_cast<uint8_t>(BIT7(val));
this->ProbeCapture(which);
break;
}
// SNDCAP0DAD
case 0x510:
SETBYTE(0, this->regs.cap[0].dad, val);
break;
case 0x511:
SETBYTE(1, this->regs.cap[0].dad, val);
break;
case 0x512:
SETBYTE(2, this->regs.cap[0].dad, val);
break;
case 0x513:
SETBYTE(3, this->regs.cap[0].dad, val & 7);
break;
// SNDCAP0LEN
case 0x514:
SETBYTE(0, this->regs.cap[0].len, val);
break;
case 0x515:
SETBYTE(1, this->regs.cap[0].len, val);
break;
case 0x516:
case 0x517:
break; // not used
// SNDCAP1DAD
case 0x518:
SETBYTE(0, this->regs.cap[1].dad, val);
break;
case 0x519:
SETBYTE(1, this->regs.cap[1].dad, val);
break;
case 0x51A:
SETBYTE(2, this->regs.cap[1].dad, val);
break;
case 0x51B:
SETBYTE(3, this->regs.cap[1].dad, val & 7);
break;
// SNDCAP1LEN
case 0x51C:
SETBYTE(0, this->regs.cap[1].len, val);
break;
case 0x51D:
SETBYTE(1, this->regs.cap[1].len, val);
break;
case 0x51E:
case 0x51F:
break; // not used
default:
{
// individual channel regs
uint32_t chan_num = (addr >> 4) & 0xF;
if (chan_num>0xF)
break;
channel_struct &thischan = this->channels[chan_num];
switch (addr & 0xF)
{
case 0x0:
thischan.vol = val & 0x7F;
break;
case 0x1:
thischan.datashift = val & 0x3;
if (thischan.datashift == 3)
thischan.datashift = 4;
thischan.hold = (val >> 7) & 0x1;
break;
case 0x2:
thischan.pan = val & 0x7F;
break;
case 0x3:
thischan.waveduty = val & 0x7;
thischan.repeat = (val >> 3) & 0x3;
thischan.format = (val >> 5) & 0x3;
thischan.keyon = static_cast<uint8_t>(BIT7(val));
this->KeyProbe(chan_num);
break;
case 0x4:
SETBYTE(0, thischan.addr, val);
break;
case 0x5:
SETBYTE(1, thischan.addr, val);
break;
case 0x6:
SETBYTE(2, thischan.addr, val);
break;
case 0x7:
SETBYTE(3, thischan.addr, val & 0x7);
break; // only 27 bits of this register are used
case 0x8:
SETBYTE(0, thischan.timer, val);
adjust_channel_timer(&thischan);
break;
case 0x9:
SETBYTE(1, thischan.timer, val);
adjust_channel_timer(&thischan);
break;
case 0xA:
SETBYTE(0, thischan.loopstart, val);
break;
case 0xB:
SETBYTE(1, thischan.loopstart, val);
break;
case 0xC:
SETBYTE(0, thischan.length, val);
break;
case 0xD:
SETBYTE(1, thischan.length, val);
break;
case 0xE:
SETBYTE(2, thischan.length, val & 0x3F);
break; // only 22 bits of this register are used
case 0xF:
SETBYTE(3, thischan.length, 0);
break;
} // switch on individual channel regs
} // default case
} // switch on address
}
void SPU_WriteByte(uint32_t addr, uint8_t val)
{
//printf("%08X: chan:%02X reg:%02X val:%02X\n",addr,(addr>>4)&0xF,addr&0xF,val);
addr &= 0xFFF;
SPU_core->WriteByte(addr, val);
if (SPU_user)
SPU_user->WriteByte(addr, val);
}
//////////////////////////////////////////////////////////////////////////////
void SPU_struct::WriteWord(uint32_t addr, uint16_t val)
{
this->WriteByte(addr, val & 0xFF);
this->WriteByte(addr + 1, (val >> 8) & 0xFF);
}
void SPU_WriteWord(uint32_t addr, uint16_t val)
{
//printf("%08X: chan:%02X reg:%02X val:%04X\n",addr,(addr>>4)&0xF,addr&0xF,val);
addr &= 0xFFF;
SPU_core->WriteWord(addr, val);
if (SPU_user)
SPU_user->WriteWord(addr, val);
}
//////////////////////////////////////////////////////////////////////////////
void SPU_struct::WriteLong(uint32_t addr, uint32_t val)
{
this->WriteByte(addr,val & 0xFF);
this->WriteByte(addr + 1,(val >> 8) & 0xFF);
this->WriteByte(addr + 2,(val >> 16) & 0xFF);
this->WriteByte(addr + 3,(val >> 24) & 0xFF);
}
void SPU_WriteLong(uint32_t addr, uint32_t val)
{
//printf("%08X: chan:%02X reg:%02X val:%08X\n",addr,(addr>>4)&0xF,addr&0xF,val);
addr &= 0xFFF;
SPU_core->WriteLong(addr, val);
if (SPU_user)
SPU_user->WriteLong(addr, val);
}
//////////////////////////////////////////////////////////////////////////////
static inline int32_t Interpolate(int32_t a, int32_t b, double ratio, SPUInterpolationMode INTERPOLATE_MODE)
{
double sampleA = static_cast<double>(a);
double sampleB = static_cast<double>(b);
ratio = ratio - u32floor(ratio);
switch (INTERPOLATE_MODE)
{
case SPUInterpolation_Cosine:
// Cosine Interpolation Formula:
// ratio2 = (1 - cos(ratio * M_PI)) / 2
// sampleI = sampleA * (1 - ratio2) + sampleB * ratio2
return s32floor((cos_lut[static_cast<unsigned>(ratio * COSINE_INTERPOLATION_RESOLUTION)] * (sampleB - sampleA)) + sampleA);
break;
case SPUInterpolation_Linear:
// Linear Interpolation Formula:
// sampleI = sampleA * (1 - ratio) + sampleB * ratio
return s32floor((ratio * (sampleB - sampleA)) + sampleA);
break;
default:
break;
}
return a;
}
//////////////////////////////////////////////////////////////////////////////
static inline void Fetch8BitData(const channel_struct *const chan, int32_t *const data, SPUInterpolationMode INTERPOLATE_MODE)
{
if (chan->sampcnt < 0)
{
*data = 0;
return;
}
uint32_t loc = u32floor(chan->sampcnt);
if (INTERPOLATE_MODE != SPUInterpolation_None)
{
int32_t a = static_cast<int32_t>(read_s8(chan->addr + loc) << 8);
if (loc < (chan->totlength << 2) - 1)
{
int32_t b = static_cast<int32_t>(read_s8(chan->addr + loc + 1) << 8);
a = Interpolate(a, b, chan->sampcnt, INTERPOLATE_MODE);
}
*data = a;
}
else
*data = static_cast<int32_t>(read_s8(chan->addr + loc) << 8);
}
static inline void Fetch16BitData(const channel_struct *const chan, int32_t *const data, SPUInterpolationMode INTERPOLATE_MODE)
{
if (chan->sampcnt < 0)
{
*data = 0;
return;
}
if (INTERPOLATE_MODE != SPUInterpolation_None)
{
uint32_t loc = u32floor(chan->sampcnt);
int32_t a = static_cast<int32_t>(read16(loc * 2 + chan->addr));
if (loc < (chan->totlength << 1) - 1)
{
int32_t b = static_cast<int32_t>(read16(loc * 2 + chan->addr + 2));
a = Interpolate(a, b, chan->sampcnt, INTERPOLATE_MODE);
}
*data = a;
}
else
*data = read16(chan->addr + u32floor(chan->sampcnt) * 2);
}
static inline void FetchADPCMData(channel_struct *const chan, int32_t *const data, SPUInterpolationMode INTERPOLATE_MODE)
{
if (chan->sampcnt < 8)
{
*data = 0;
return;
}
// No sense decoding, just return the last sample
if (chan->lastsampcnt != u32floor(chan->sampcnt))
{
uint32_t endExclusive = u32floor(chan->sampcnt + 1);
for (uint32_t i = chan->lastsampcnt + 1; i < endExclusive; ++i)
{
uint32_t shift = (i & 1) << 2;
uint32_t data4bit = static_cast<uint32_t>(read08(chan->addr + (i >> 1))) >> shift;
int32_t diff = precalcdifftbl[chan->index][data4bit & 0xF];
chan->index = precalcindextbl[chan->index][data4bit & 0x7];
chan->pcm16b_last = chan->pcm16b;
chan->pcm16b = MinMax(chan->pcm16b+diff, -0x8000, 0x7FFF);
if (i == static_cast<uint32_t>(chan->loopstart << 3))
{
if (chan->loop_index != K_ADPCM_LOOPING_RECOVERY_INDEX)
printf("over-snagging\n");
chan->loop_pcm16b = chan->pcm16b;
chan->loop_index = chan->index;
}
}
chan->lastsampcnt = u32floor(chan->sampcnt);
}
if (INTERPOLATE_MODE != SPUInterpolation_None)
*data = Interpolate(static_cast<int32_t>(chan->pcm16b_last), static_cast<int32_t>(chan->pcm16b), chan->sampcnt, INTERPOLATE_MODE);
else
*data = static_cast<int32_t>(chan->pcm16b);
}
static inline void FetchPSGData(channel_struct *chan, int32_t *data)
{
if (chan->sampcnt < 0)
{
*data = 0;
return;
}
if (chan->num < 8)
*data = 0;
else if (chan->num < 14)
*data = static_cast<int32_t>(wavedutytbl[chan->waveduty][u32floor(chan->sampcnt) & 0x7]);
else
{
if (chan->lastsampcnt == u32floor(chan->sampcnt))
{
*data = static_cast<int32_t>(chan->psgnoise_last);
return;
}
uint32_t max = u32floor(chan->sampcnt);
for (uint32_t i = chan->lastsampcnt; i < max; ++i)
{
if (chan->x & 0x1)
{
chan->x = (chan->x >> 1) ^ 0x6000;
chan->psgnoise_last = -0x7FFF;
}
else
{
chan->x >>= 1;
chan->psgnoise_last = 0x7FFF;
}
}
chan->lastsampcnt = u32floor(chan->sampcnt);
*data = static_cast<int32_t>(chan->psgnoise_last);
}
}
//////////////////////////////////////////////////////////////////////////////
static inline void MixL(SPU_struct *SPU, channel_struct *chan, int32_t data)
{
data = spumuldiv7(data, chan->vol) >> chan->datashift;
SPU->sndbuf[SPU->bufpos << 1] += data;
}
static inline void MixR(SPU_struct *SPU, channel_struct *chan, int32_t data)
{
data = spumuldiv7(data, chan->vol) >> chan->datashift;
SPU->sndbuf[(SPU->bufpos << 1) + 1] += data;
}
static inline void MixLR(SPU_struct *SPU, channel_struct *chan, int32_t data)
{
data = spumuldiv7(data, chan->vol) >> chan->datashift;
SPU->sndbuf[SPU->bufpos << 1] += spumuldiv7(data, 127 - chan->pan);
SPU->sndbuf[(SPU->bufpos << 1) + 1] += spumuldiv7(data, chan->pan);
}
//////////////////////////////////////////////////////////////////////////////
static inline void TestForLoop(SPU_struct *SPU, channel_struct *chan, int FORMAT)
{
int shift = !FORMAT ? 2 : 1;
chan->sampcnt += chan->sampinc;
if (chan->sampcnt > chan->double_totlength_shifted)
{
// Do we loop? Or are we done?
if (chan->repeat == 1)
{
while (chan->sampcnt > chan->double_totlength_shifted)
chan->sampcnt -= chan->double_totlength_shifted - static_cast<double>(chan->loopstart << shift);
//chan->sampcnt = (double)(chan->loopstart << shift);
}
else
{
SPU->KeyOff(chan->num);
SPU->bufpos = SPU->buflength;
}
}
}
static inline void TestForLoop2(SPU_struct *SPU, channel_struct *chan)
{
chan->sampcnt += chan->sampinc;
if (chan->sampcnt > chan->double_totlength_shifted)
{
// Do we loop? Or are we done?
if (chan->repeat == 1)
{
while (chan->sampcnt > chan->double_totlength_shifted)
chan->sampcnt -= chan->double_totlength_shifted - static_cast<double>(chan->loopstart << 3);
if (chan->loop_index == K_ADPCM_LOOPING_RECOVERY_INDEX)
{
chan->pcm16b = read16(chan->addr);
chan->index = read08(chan->addr + 2) & 0x7F;
chan->lastsampcnt = 7;
}
else
{
chan->pcm16b = chan->loop_pcm16b;
chan->index = chan->loop_index;
chan->lastsampcnt = chan->loopstart << 3;
}
}
else
{
chan->status = CHANSTAT_STOPPED;
SPU->KeyOff(chan->num);
SPU->bufpos = SPU->buflength;
}
}
}
static inline void SPU_Mix(SPU_struct *SPU, channel_struct *chan, int32_t data, int CHANNELS)
{
switch (CHANNELS)
{
case 0:
MixL(SPU, chan, data);
break;
case 1:
MixLR(SPU, chan, data);
break;
case 2:
MixR(SPU, chan, data);
}
SPU->lastdata = data;
}
// WORK
static inline void ____SPU_ChanUpdate(SPU_struct *const SPU, channel_struct *const chan, int FORMAT, SPUInterpolationMode INTERPOLATE_MODE, int CHANNELS)
{
for (; SPU->bufpos < SPU->buflength; ++SPU->bufpos)
{
if (CHANNELS != -1)
{
int32_t data = 0;
switch (FORMAT)
{
case 0:
Fetch8BitData(chan, &data, INTERPOLATE_MODE);
break;
case 1:
Fetch16BitData(chan, &data, INTERPOLATE_MODE);
break;
case 2:
FetchADPCMData(chan, &data, INTERPOLATE_MODE);
break;
case 3:
FetchPSGData(chan, &data);
}
SPU_Mix(SPU, chan, data, CHANNELS);
}
switch (FORMAT)
{
case 0:
case 1:
TestForLoop(SPU, chan, FORMAT);
break;
case 2:
TestForLoop2(SPU, chan);
break;
case 3:
chan->sampcnt += chan->sampinc;
}
}
}
static inline void ___SPU_ChanUpdate(bool actuallyMix, SPU_struct *const SPU, channel_struct *const chan, int FORMAT, SPUInterpolationMode INTERPOLATE_MODE)
{
if (!actuallyMix)
____SPU_ChanUpdate(SPU, chan, FORMAT, INTERPOLATE_MODE, -1);
else if (!chan->pan)
____SPU_ChanUpdate(SPU, chan, FORMAT, INTERPOLATE_MODE, 0);
else if (chan->pan == 127)
____SPU_ChanUpdate(SPU, chan, FORMAT, INTERPOLATE_MODE, 2);
else
____SPU_ChanUpdate(SPU, chan, FORMAT, INTERPOLATE_MODE, 1);
}
static inline void __SPU_ChanUpdate(bool actuallyMix, SPU_struct *const SPU, channel_struct *const chan, SPUInterpolationMode INTERPOLATE_MODE)
{
switch (chan->format)
{
case 0:
___SPU_ChanUpdate(actuallyMix, SPU, chan, 0, INTERPOLATE_MODE);
break;
case 1:
___SPU_ChanUpdate(actuallyMix, SPU, chan, 1, INTERPOLATE_MODE);
break;
case 2:
___SPU_ChanUpdate(actuallyMix, SPU, chan, 2, INTERPOLATE_MODE);
break;
case 3:
___SPU_ChanUpdate(actuallyMix, SPU, chan, 3, INTERPOLATE_MODE);
break;
default:
assert(false);
}
}
static inline void _SPU_ChanUpdate(bool actuallyMix, SPU_struct *const SPU, channel_struct *const chan)
{
switch (CommonSettings.spuInterpolationMode)
{
case SPUInterpolation_None:
__SPU_ChanUpdate(actuallyMix, SPU, chan, SPUInterpolation_None);
break;
case SPUInterpolation_Linear:
__SPU_ChanUpdate(actuallyMix, SPU, chan, SPUInterpolation_Linear);
break;
case SPUInterpolation_Cosine:
__SPU_ChanUpdate(actuallyMix, SPU, chan, SPUInterpolation_Cosine);
break;
default:
assert(false);
}
}
// ENTERNEW
static void SPU_MixAudio_Advanced(bool, SPU_struct *SPU, int length)
{
// the advanced spu function correctly handles all sound control mixing options, as well as capture
// this code is not entirely optimal, as it relies on sort of manhandling the core mixing functions
// in order to get the results it needs.
// THIS IS MAX HACKS!!!!
// AND NEEDS TO BE REWRITTEN ALONG WITH THE DEEPEST PARTS OF THE SPU
// ONCE WE KNOW THAT IT WORKS
// BIAS gets ignored since our spu is still not bit perfect,
// and it doesnt matter for purposes of capture
// -----------DEBUG CODE
bool skipcap = false;
// -----------------
int32_t samp0[] = { 0, 0 };
// believe it or not, we are going to do this one sample at a time.
// like i said, it is slower.
for (int samp = 0; samp < length; ++samp)
{
SPU->sndbuf[0] = SPU->sndbuf[1] = 0;
SPU->buflength = 1;
int32_t capmix[] = { 0, 0 }, mix[] = { 0, 0 };
int32_t chanout[16];
int32_t submix[32];
// generate each channel, and helpfully mix it at the same time
for (int i = 0; i < 16; ++i)
{
channel_struct *chan = &SPU->channels[i];
if (chan->status == CHANSTAT_PLAY)
{
SPU->bufpos = 0;
bool bypass = false;
if (i == 1 && SPU->regs.ctl_ch1bypass)
bypass = true;
if (i == 3 && SPU->regs.ctl_ch3bypass)
bypass = true;
// output to mixer unless we are bypassed.
// dont output to mixer if the user muted us
bool outputToMix = true;
if (CommonSettings.spu_muteChannels[i])
outputToMix = false;
if (bypass)
outputToMix = false;
bool outputToCap = outputToMix;
if (CommonSettings.spu_captureMuted && !bypass)
outputToCap = true;
// channels 1 and 3 should probably always generate their audio
// internally at least, just in case they get used by the spu output
bool domix = outputToCap || outputToMix || i == 1 || i == 3;
// clear the output buffer since this is where _SPU_ChanUpdate wants to accumulate things
SPU->sndbuf[0] = SPU->sndbuf[1] = 0;
// get channel's next output sample.
_SPU_ChanUpdate(domix, SPU, chan);
chanout[i] = SPU->lastdata >> chan->datashift;
// save the panned results
submix[i * 2] = SPU->sndbuf[0];
submix[i * 2 + 1] = SPU->sndbuf[1];
// send sample to our capture mix
if (outputToCap)
{
capmix[0] += submix[i * 2];
capmix[1] += submix[i * 2 + 1];
}
// send sample to our main mixer
if (outputToMix)
{
mix[0] += submix[i * 2];
mix[1] += submix[i * 2 + 1];
}
}
else
chanout[i] = submix[i * 2] = submix[i * 2 + 1] = 0;
} // foreach channel
int32_t mixout[] = { mix[0], mix[1] };
int32_t capmixout[] = { capmix[0], capmix[1] };
int32_t sndout[] = { 0, 0 };
int32_t capout[2];
// create SPU output
switch (SPU->regs.ctl_left)
{
case SPU_struct::REGS::LOM_LEFT_MIXER:
sndout[0] = mixout[0];
break;
case SPU_struct::REGS::LOM_CH1:
sndout[0] = submix[2];
break;
case SPU_struct::REGS::LOM_CH3:
sndout[0] = submix[6];
break;
case SPU_struct::REGS::LOM_CH1_PLUS_CH3:
sndout[0] = submix[2] + submix[6];
}
switch (SPU->regs.ctl_right)
{
case SPU_struct::REGS::ROM_RIGHT_MIXER:
sndout[1] = mixout[1];
break;
case SPU_struct::REGS::ROM_CH1:
sndout[1] = submix[3];
break;
case SPU_struct::REGS::ROM_CH3:
sndout[1] = submix[7];
break;
case SPU_struct::REGS::ROM_CH1_PLUS_CH3:
sndout[1] = submix[3] + submix[7];
}
// generate capture output ("capture bugs" from gbatek are not emulated)
if (!SPU->regs.cap[0].source)
capout[0] = capmixout[0]; // cap0 = L-mix
else if (SPU->regs.cap[0].add)
capout[0] = chanout[0] + chanout[1]; // cap0 = ch0+ch1
else
capout[0] = chanout[0]; // cap0 = ch0
if (!SPU->regs.cap[1].source)
capout[1] = capmixout[1]; // cap1 = R-mix
else if (SPU->regs.cap[1].add)
capout[1] = chanout[2] + chanout[3]; // cap1 = ch2+ch3
else
capout[1] = chanout[2]; // cap1 = ch2
capout[0] = MinMax(capout[0], -0x8000, 0x7FFF);
capout[1] = MinMax(capout[1], -0x8000, 0x7FFF);
// write the output sample where it is supposed to go
if (!samp)
{
samp0[0] = sndout[0];
samp0[1] = sndout[1];
}
else
{
SPU->sndbuf[samp * 2] = sndout[0];
SPU->sndbuf[samp * 2 + 1] = sndout[1];
}
for (int capchan = 0; capchan < 2; ++capchan)
{
if (SPU->regs.cap[capchan].runtime.running)
{
SPU_struct::REGS::CAP &cap = SPU->regs.cap[capchan];
uint32_t last = u32floor(cap.runtime.sampcnt);
cap.runtime.sampcnt += SPU->channels[2 * capchan + 1].sampinc;
uint32_t curr = u32floor(cap.runtime.sampcnt);
for (uint32_t j = last; j < curr; ++j)
{
// so, this is a little strange. why go through a fifo?
// it seems that some games will set up a reverb effect by capturing
// to the nearly same address as playback, but ahead by a couple.
// So, playback will always end up being what was captured a couple of samples ago.
// This system counts on playback always having read ahead 16 samples.
// In that case, playback will end up being what was processed at one entire buffer length ago,
// since the 16 samples would have read ahead before they got captured over
// It's actually the source channels which should have a fifo, but we are
// not going to take the hit in speed and complexity. Save it for a future rewrite.
// Instead, what we do here is delay the capture by 16 samples to create a similar effect.
// Subjectively, it seems to be working.
// Don't do anything until the fifo is filled, so as to delay it
if (cap.runtime.fifo.size < 16)
{
cap.runtime.fifo.enqueue(static_cast<int16_t>(capout[capchan]));
continue;
}
// (actually capture sample from fifo instead of most recently generated)
int32_t sample = cap.runtime.fifo.dequeue();
cap.runtime.fifo.enqueue(static_cast<int16_t>(capout[capchan]));
uint32_t multiplier;
if (cap.bits8)
{
int8_t sample8 = static_cast<int8_t>(sample >> 8);
if (skipcap)
_MMU_write08<1, MMU_AT_DMA>(cap.runtime.curdad, 0);
else
_MMU_write08<1, MMU_AT_DMA>(cap.runtime.curdad, sample8);
++cap.runtime.curdad;
multiplier = 4;
}
else
{
int16_t sample16 = static_cast<int16_t>(sample);
if (skipcap)
_MMU_write16<1, MMU_AT_DMA>(cap.runtime.curdad, 0);
else
_MMU_write16<1, MMU_AT_DMA>(cap.runtime.curdad, sample16);
cap.runtime.curdad += 2;
multiplier = 2;
}
if (cap.runtime.curdad >= cap.runtime.maxdad)
{
cap.runtime.curdad = cap.dad;
cap.runtime.sampcnt -= cap.len * multiplier;
}
} // sampinc loop
} // if capchan running
} // capchan loop
} // main sample loop
SPU->sndbuf[0] = samp0[0];
SPU->sndbuf[1] = samp0[1];
}
// ENTER
static void SPU_MixAudio(bool actuallyMix, SPU_struct *SPU, int length)
{
if (actuallyMix)
{
memset(&SPU->sndbuf[0], 0, length * 4 * 2);
memset(&SPU->outbuf[0], 0, length * 2 * 2);
}
// we used to use master enable here, and do nothing if audio is disabled.
// now, master enable is emulated better..
// but for a speed optimization we will still do it
if (!SPU->regs.masteren)
return;
bool advanced = CommonSettings.spu_advanced;
// branch here so that slow computers don't have to take the advanced (slower) codepath.
// it remainds to be seen exactly how much slower it is
// if it isnt much slower then we should refactor everything to be simpler, once it is working
if (advanced && SPU == SPU_core.get())
SPU_MixAudio_Advanced(actuallyMix, SPU, length);
else
{
// non-advanced mode
for (int i = 0; i < 16; ++i)
{
channel_struct *chan = &SPU->channels[i];
if (chan->status != CHANSTAT_PLAY)
continue;
SPU->bufpos = 0;
SPU->buflength = length;
// Mix audio
_SPU_ChanUpdate(!CommonSettings.spu_muteChannels[i] && actuallyMix, SPU, chan);
}
}
// we used to bail out if speakers were disabled.
// this is technically wrong. sound may still be captured, or something.
// in all likelihood, any game doing this probably master disabled the SPU also
// so, optimization of this case is probably not necessary.
// later, we'll just silence the output
bool speakers = T1ReadWord(MMU.ARM7_REG, 0x304) & 0x01;
uint8_t vol = SPU->regs.mastervol;
// convert from 32-bit->16-bit
if (actuallyMix && speakers)
for (int i = 0; i < length * 2; ++i)
{
// Apply Master Volume
SPU->sndbuf[i] = spumuldiv7(SPU->sndbuf[i], vol);
int16_t outsample = static_cast<int16_t>(MinMax(SPU->sndbuf[i], -0x8000, 0x7FFF));
SPU->outbuf[i] = outsample;
}
}
//////////////////////////////////////////////////////////////////////////////
// emulates one hline of the cpu core.
// this will produce a variable number of samples, calculated to keep a 44100hz output
// in sync with the emulator framerate
int spu_core_samples = 0;
void SPU_Emulate_core()
{
bool needToMix = true;
samples += samples_per_hline;
spu_core_samples = static_cast<int>(samples);
samples -= spu_core_samples;
// We don't need to mix audio for Dual Synch/Asynch mode since we do this
// later in SPU_Emulate_user(). Disable mixing here to speed up processing.
// However, recording still needs to mix the audio, so make sure we're also
// not recording before we disable mixing.
if (synchmode == ESynchMode_DualSynchAsynch)
needToMix = false;
SPU_MixAudio(needToMix, SPU_core.get(), spu_core_samples);
if (!SNDCore)
return;
if (SNDCore->FetchSamples)
SNDCore->FetchSamples(&SPU_core->outbuf[0], spu_core_samples, synchmode, synchronizer.get());
else
SPU_DefaultFetchSamples(&SPU_core->outbuf[0], spu_core_samples, synchmode, synchronizer.get());
}
void SPU_Emulate_user(bool /*mix*/)
{
static std::vector<int16_t> postProcessBuffer;
static size_t postProcessBufferSize = 0;
size_t processedSampleCount = 0;
if (!SNDCore)
return;
// Check to see how many free samples are available.
// If there are some, fill up the output buffer.
size_t freeSampleCount = SNDCore->GetAudioSpace();
if (!freeSampleCount)
return;
//printf("mix %i samples\n", audiosize);
if (freeSampleCount > buffersize)
freeSampleCount = buffersize;
// If needed, resize the post-process buffer to guarantee that
// we can store all the sound data.
if (postProcessBufferSize < freeSampleCount * 2 * sizeof(int16_t))
{
postProcessBufferSize = freeSampleCount * 2 * sizeof(int16_t);
postProcessBuffer.resize(postProcessBufferSize);
}
if (SNDCore->PostProcessSamples)
processedSampleCount = SNDCore->PostProcessSamples(&postProcessBuffer[0], freeSampleCount, synchmode, synchronizer.get());
else
processedSampleCount = SPU_DefaultPostProcessSamples(&postProcessBuffer[0], freeSampleCount, synchmode, synchronizer.get());
SNDCore->UpdateAudio(&postProcessBuffer[0], processedSampleCount);
}
void SPU_DefaultFetchSamples(int16_t *sampleBuffer, size_t sampleCount, ESynchMode synchMode, ISynchronizingAudioBuffer *theSynchronizer)
{
if (synchMode == ESynchMode_Synchronous)
theSynchronizer->enqueue_samples(sampleBuffer, sampleCount);
}
size_t SPU_DefaultPostProcessSamples(int16_t *postProcessBuffer, size_t requestedSampleCount, ESynchMode synchMode, ISynchronizingAudioBuffer *theSynchronizer)
{
size_t processedSampleCount = 0;
switch (synchMode)
{
case ESynchMode_DualSynchAsynch:
if (SPU_user)
{
SPU_MixAudio(true, SPU_user.get(), requestedSampleCount);
memcpy(postProcessBuffer, &SPU_user->outbuf[0], requestedSampleCount * 2 * sizeof(int16_t));
processedSampleCount = requestedSampleCount;
}
break;
case ESynchMode_Synchronous:
processedSampleCount = theSynchronizer->output_samples(postProcessBuffer, requestedSampleCount);
}
return processedSampleCount;
}
//////////////////////////////////////////////////////////////////////////////
// Dummy Sound Interface
//////////////////////////////////////////////////////////////////////////////
int SNDDummyInit(int) { return 0; }
void SNDDummyDeInit() {}
void SNDDummyUpdateAudio(int16_t *, uint32_t) { }
uint32_t SNDDummyGetAudioSpace() { return DESMUME_SAMPLE_RATE / 60 + 5; }
void SNDDummyMuteAudio() {}
void SNDDummyUnMuteAudio() {}
void SNDDummySetVolume(int) {}
void SNDDummyClearBuffer() {}
void SNDDummyFetchSamples(int16_t *, size_t, ESynchMode, ISynchronizingAudioBuffer *) { }
size_t SNDDummyPostProcessSamples(int16_t *, size_t, ESynchMode, ISynchronizingAudioBuffer *) { return 0; }
SoundInterface_struct SNDDummy =
{
SNDCORE_DUMMY,
"Dummy Sound Interface",
SNDDummyInit,
SNDDummyDeInit,
SNDDummyUpdateAudio,
SNDDummyGetAudioSpace,
SNDDummyMuteAudio,
SNDDummyUnMuteAudio,
SNDDummySetVolume,
SNDDummyClearBuffer,
SNDDummyFetchSamples,
SNDDummyPostProcessSamples
};