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/*
* Snes9x - Portable Super Nintendo Entertainment System (TM) emulator.
*
* (c) Copyright 1996 - 2001 Gary Henderson (gary.henderson@ntlworld.com) and
* Jerremy Koot (jkoot@snes9x.com)
*
* Super FX C emulator code
* (c) Copyright 1997 - 1999 Ivar (ivar@snes9x.com) and
* Gary Henderson.
* Super FX assembler emulator code (c) Copyright 1998 zsKnight and _Demo_.
*
* DSP1 emulator code (c) Copyright 1998 Ivar, _Demo_ and Gary Henderson.
* C4 asm and some C emulation code (c) Copyright 2000 zsKnight and _Demo_.
* C4 C code (c) Copyright 2001 Gary Henderson (gary.henderson@ntlworld.com).
*
* DOS port code contains the works of other authors. See headers in
* individual files.
*
* Snes9x homepage: http://www.snes9x.com
*
* Permission to use, copy, modify and distribute Snes9x in both binary and
* source form, for non-commercial purposes, is hereby granted without fee,
* providing that this license information and copyright notice appear with
* all copies and any derived work.
*
* This software is provided 'as-is', without any express or implied
* warranty. In no event shall the authors be held liable for any damages
* arising from the use of this software.
*
* Snes9x is freeware for PERSONAL USE only. Commercial users should
* seek permission of the copyright holders first. Commercial use includes
* charging money for Snes9x or software derived from Snes9x.
*
* The copyright holders request that bug fixes and improvements to the code
* should be forwarded to them so everyone can benefit from the modifications
* in future versions.
*
* Super NES and Super Nintendo Entertainment System are trademarks of
* Nintendo Co., Limited and its subsidiary companies.
*/
#include "snes9x.h"
#include "spctool/dsp.h"
#include "spctool/spc700.h"
#include "spctool/soundmod.h"
#include "apu.h"
bool8 S9xOpenSoundDevice (int, bool8, int);
void S9xSetPlaybackRate (uint32 rate)
{
DOpt SmpOpt;
SmpOpt.Smp8bit=false;
SmpOpt.SmpMono=false;
SmpOpt.IntType=IntC;
SmpOpt.OldBRE=false;
SmpOpt.MixRout=1;
SetSPUOpt (rate, SmpOpt);
// so.playback_rate = playback_rate;
// so.err_rate = (uint32) (SNES_SCANLINE_TIME * FIXED_POINT / (1.0 / (double) so.playback_rate));
}
bool8 S9xSetSoundMute (bool8 mute)
{
return (TRUE);
}
START_EXTERN_C
bool8 S9xInitSound (int mode, bool8 stereo, int buffer_size)
{
if (!(mode & 7))
return (TRUE);
S9xSetSoundMute (TRUE);
if (!S9xOpenSoundDevice (mode, stereo, buffer_size))
{
S9xMessage (S9X_ERROR, S9X_SOUND_DEVICE_OPEN_FAILED,
"Sound device open failed");
return (FALSE);
}
return (TRUE);
}
void TraceSPC (unsigned char *PC, unsigned short YA, unsigned char X,
SPCFlags PS, unsigned char *SP)
{
APURegisters.YA.W = YA;
APURegisters.X = X;
APURegisters.S = SP - IAPU.RAM;
IAPU.PC = PC;
IAPU._Carry = PS.C;
IAPU._Zero = !PS.Z | (PS.N << 7);
IAPU._Overflow = PS.V;
APURegisters.P = *(uint8 *) &PS;
S9xTraceAPU ();
}
bool8 S9xInitAPU ()
{
void *SPCBase; //Base pointer and aligned pointer to SPC RAM
SPCBase=malloc(131072); //Allocate memory for SPC RAM
IAPU.RAM=(uint8 *) InitSPU(SPCBase); //Initialize SPU w/ ptr to SPC RAM (Call only once)
S9xSetPlaybackRate (22000);
ResetSPU(20); //Reset SPU with pre-amp level of 30
// _SetSPCDbg(TraceSPC); //Install debug handler
return (TRUE);
}
void S9xResetAPU ()
{
ResetSPU(20);
IAPU.RAM [0xf1] = 0x80;
_FixSPC (0xffc0, 0, 0, 0, 0, 0xff);
// FixDSP ();
}
extern "C" void EDSP (uint8 *, int32);
void S9xMixSamplesO (uint8 *buffer, int sample_count, int byte_offset)
{
// _EmuDSP (buffer + byte_offset, sample_count / 2);
EDSP (buffer + byte_offset, sample_count / 2);
#if 0
for (int i = 0; i < 32; i++)
printf ("%02x,", *(buffer + byte_offset + i));
printf ("\n");
#endif
}
END_EXTERN_C
void S9xFixSoundAfterSnapshotLoad ()
{
}
void S9xSetSoundControl (int)
{
}
#ifdef DEBUGGER
START_EXTERN_C
void S9xDeinitAPU ()
{
}
END_EXTERN_C
#endif
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