491 lines
12 KiB
C++
491 lines
12 KiB
C++
/***********************************************************************************
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Snes9x - Portable Super Nintendo Entertainment System (TM) emulator.
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(c) Copyright 1996 - 2002 Gary Henderson (gary.henderson@ntlworld.com),
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Jerremy Koot (jkoot@snes9x.com)
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(c) Copyright 2002 - 2004 Matthew Kendora
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(c) Copyright 2002 - 2005 Peter Bortas (peter@bortas.org)
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(c) Copyright 2004 - 2005 Joel Yliluoma (http://iki.fi/bisqwit/)
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(c) Copyright 2001 - 2006 John Weidman (jweidman@slip.net)
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(c) Copyright 2002 - 2006 funkyass (funkyass@spam.shaw.ca),
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Kris Bleakley (codeviolation@hotmail.com)
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(c) Copyright 2002 - 2010 Brad Jorsch (anomie@users.sourceforge.net),
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Nach (n-a-c-h@users.sourceforge.net),
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(c) Copyright 2002 - 2011 zones (kasumitokoduck@yahoo.com)
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(c) Copyright 2006 - 2007 nitsuja
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(c) Copyright 2009 - 2016 BearOso,
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OV2
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(c) Copyright 2011 - 2016 Hans-Kristian Arntzen,
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Daniel De Matteis
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(Under no circumstances will commercial rights be given)
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BS-X C emulator code
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(c) Copyright 2005 - 2006 Dreamer Nom,
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zones
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C4 x86 assembler and some C emulation code
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(c) Copyright 2000 - 2003 _Demo_ (_demo_@zsnes.com),
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Nach,
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zsKnight (zsknight@zsnes.com)
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C4 C++ code
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(c) Copyright 2003 - 2006 Brad Jorsch,
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Nach
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DSP-1 emulator code
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(c) Copyright 1998 - 2006 _Demo_,
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Andreas Naive (andreasnaive@gmail.com),
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Gary Henderson,
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Ivar (ivar@snes9x.com),
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John Weidman,
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Kris Bleakley,
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Matthew Kendora,
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Nach,
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neviksti (neviksti@hotmail.com)
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DSP-2 emulator code
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(c) Copyright 2003 John Weidman,
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Kris Bleakley,
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Lord Nightmare (lord_nightmare@users.sourceforge.net),
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Matthew Kendora,
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neviksti
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DSP-3 emulator code
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(c) Copyright 2003 - 2006 John Weidman,
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Kris Bleakley,
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Lancer,
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z80 gaiden
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DSP-4 emulator code
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(c) Copyright 2004 - 2006 Dreamer Nom,
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John Weidman,
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Kris Bleakley,
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Nach,
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z80 gaiden
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OBC1 emulator code
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(c) Copyright 2001 - 2004 zsKnight,
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pagefault (pagefault@zsnes.com),
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Kris Bleakley
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Ported from x86 assembler to C by sanmaiwashi
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SPC7110 and RTC C++ emulator code used in 1.39-1.51
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(c) Copyright 2002 Matthew Kendora with research by
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zsKnight,
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John Weidman,
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Dark Force
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SPC7110 and RTC C++ emulator code used in 1.52+
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(c) Copyright 2009 byuu,
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neviksti
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S-DD1 C emulator code
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(c) Copyright 2003 Brad Jorsch with research by
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Andreas Naive,
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John Weidman
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S-RTC C emulator code
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(c) Copyright 2001 - 2006 byuu,
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John Weidman
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ST010 C++ emulator code
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(c) Copyright 2003 Feather,
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John Weidman,
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Kris Bleakley,
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Matthew Kendora
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Super FX x86 assembler emulator code
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(c) Copyright 1998 - 2003 _Demo_,
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pagefault,
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zsKnight
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Super FX C emulator code
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(c) Copyright 1997 - 1999 Ivar,
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Gary Henderson,
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John Weidman
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Sound emulator code used in 1.5-1.51
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(c) Copyright 1998 - 2003 Brad Martin
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(c) Copyright 1998 - 2006 Charles Bilyue'
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Sound emulator code used in 1.52+
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(c) Copyright 2004 - 2007 Shay Green (gblargg@gmail.com)
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S-SMP emulator code used in 1.54+
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(c) Copyright 2016 byuu
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SH assembler code partly based on x86 assembler code
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(c) Copyright 2002 - 2004 Marcus Comstedt (marcus@mc.pp.se)
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2xSaI filter
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(c) Copyright 1999 - 2001 Derek Liauw Kie Fa
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HQ2x, HQ3x, HQ4x filters
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(c) Copyright 2003 Maxim Stepin (maxim@hiend3d.com)
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NTSC filter
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(c) Copyright 2006 - 2007 Shay Green
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GTK+ GUI code
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(c) Copyright 2004 - 2016 BearOso
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Win32 GUI code
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(c) Copyright 2003 - 2006 blip,
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funkyass,
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Matthew Kendora,
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Nach,
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nitsuja
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(c) Copyright 2009 - 2016 OV2
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Mac OS GUI code
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(c) Copyright 1998 - 2001 John Stiles
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(c) Copyright 2001 - 2011 zones
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Libretro port
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(c) Copyright 2011 - 2016 Hans-Kristian Arntzen,
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Daniel De Matteis
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(Under no circumstances will commercial rights be given)
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MSU-1 code
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(c) Copyright 2016 qwertymodo
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Specific ports contains the works of other authors. See headers in
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individual files.
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Snes9x homepage: http://www.snes9x.com/
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Permission to use, copy, modify and/or distribute Snes9x in both binary
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and source form, for non-commercial purposes, is hereby granted without
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fee, providing that this license information and copyright notice appear
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with all copies and any derived work.
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This software is provided 'as-is', without any express or implied
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warranty. In no event shall the authors be held liable for any damages
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arising from the use of this software or it's derivatives.
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Snes9x is freeware for PERSONAL USE only. Commercial users should
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seek permission of the copyright holders first. Commercial use includes,
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but is not limited to, charging money for Snes9x or software derived from
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Snes9x, including Snes9x or derivatives in commercial game bundles, and/or
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using Snes9x as a promotion for your commercial product.
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The copyright holders request that bug fixes and improvements to the code
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should be forwarded to them so everyone can benefit from the modifications
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in future versions.
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Super NES and Super Nintendo Entertainment System are trademarks of
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Nintendo Co., Limited and its subsidiary companies.
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***********************************************************************************/
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#include "snes9x.h"
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#include "display.h"
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#include "msu1.h"
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#include "apu/bapu/dsp/blargg_endian.h"
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#include <fstream>
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#include <sys/stat.h>
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std::ifstream dataFile, audioFile;
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uint32 audioLoopPos;
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uint32 partial_samples;
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// Sample buffer
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int16 *bufPos, *bufBegin, *bufEnd;
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bool AudioOpen()
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{
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MSU1.MSU1_STATUS |= AudioError;
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if (audioFile.is_open())
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audioFile.close();
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char ext[_MAX_EXT];
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snprintf(ext, _MAX_EXT, "-%d.pcm", MSU1.MSU1_CURRENT_TRACK);
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audioFile.clear();
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audioFile.open(S9xGetFilename(ext, ROMFILENAME_DIR), std::ios::in | std::ios::binary);
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if (audioFile.good())
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{
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if (audioFile.get() != 'M')
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return false;
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if (audioFile.get() != 'S')
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return false;
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if (audioFile.get() != 'U')
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return false;
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if (audioFile.get() != '1')
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return false;
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audioFile.read((char *)&audioLoopPos, 4);
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audioLoopPos = GET_LE32(&audioLoopPos);
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audioLoopPos <<= 2;
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audioLoopPos += 8;
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MSU1.MSU1_STATUS &= ~AudioError;
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return true;
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}
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return false;
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}
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bool DataOpen()
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{
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if (dataFile.is_open())
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dataFile.close();
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dataFile.clear();
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dataFile.open(S9xGetFilename(".msu", ROMFILENAME_DIR), std::ios::in | std::ios::binary);
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return dataFile.is_open();
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}
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void S9xResetMSU(void)
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{
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MSU1.MSU1_STATUS = 0;
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MSU1.MSU1_DATA_SEEK = 0;
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MSU1.MSU1_DATA_POS = 0;
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MSU1.MSU1_TRACK_SEEK = 0;
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MSU1.MSU1_CURRENT_TRACK = 0;
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MSU1.MSU1_RESUME_TRACK = 0;
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MSU1.MSU1_VOLUME = 0;
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MSU1.MSU1_CONTROL = 0;
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MSU1.MSU1_AUDIO_POS = 0;
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MSU1.MSU1_RESUME_POS = 0;
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bufPos = 0;
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bufBegin = 0;
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bufEnd = 0;
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partial_samples = 0;
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if (dataFile.is_open())
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dataFile.close();
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if (audioFile.is_open())
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audioFile.close();
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Settings.MSU1 = S9xMSU1ROMExists();
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}
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void S9xMSU1Init(void)
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{
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S9xResetMSU();
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DataOpen();
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}
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bool S9xMSU1ROMExists(void)
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{
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struct stat buf;
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return (stat(S9xGetFilename(".msu", ROMFILENAME_DIR), &buf) == 0);
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}
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void S9xMSU1Generate(int sample_count)
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{
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partial_samples += 44100 * sample_count;
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while (((uintptr_t)bufPos < (uintptr_t)bufEnd) && (MSU1.MSU1_STATUS & AudioPlaying) && partial_samples > 32040)
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{
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if (audioFile.is_open())
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{
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int16 sample;
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if (audioFile.read((char *)&sample, 2).good())
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{
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sample = (int16)((double)(int16)GET_LE16(&sample) * (double)MSU1.MSU1_VOLUME / 255.0);
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*(bufPos++) = sample;
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MSU1.MSU1_AUDIO_POS += 2;
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partial_samples -= 32040;
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}
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else
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if (audioFile.eof())
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{
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sample = (int16)((double)(int16)GET_LE16(&sample) * (double)MSU1.MSU1_VOLUME / 255.0);
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*(bufPos++) = sample;
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MSU1.MSU1_AUDIO_POS += 2;
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partial_samples -= 32040;
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if (MSU1.MSU1_STATUS & AudioRepeating)
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{
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audioFile.clear();
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MSU1.MSU1_AUDIO_POS = audioLoopPos;
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audioFile.seekg(MSU1.MSU1_AUDIO_POS);
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}
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else
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{
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MSU1.MSU1_STATUS &= ~(AudioPlaying | AudioRepeating);
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audioFile.clear();
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audioFile.seekg(8);
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return;
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}
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}
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else
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{
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MSU1.MSU1_STATUS &= ~(AudioPlaying | AudioRepeating);
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return;
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}
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}
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else
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{
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MSU1.MSU1_STATUS &= ~(AudioPlaying | AudioRepeating);
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return;
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}
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}
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}
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uint8 S9xMSU1ReadPort(int port)
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{
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switch (port)
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{
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case 0:
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return MSU1.MSU1_STATUS;
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case 1:
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if (MSU1.MSU1_STATUS & DataBusy)
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return 0;
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if (dataFile.fail() || dataFile.bad() || dataFile.eof())
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return 0;
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MSU1.MSU1_DATA_POS++;
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return dataFile.get();
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case 2:
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return 'S';
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case 3:
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return '-';
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case 4:
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return 'M';
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case 5:
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return 'S';
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case 6:
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return 'U';
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case 7:
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return '1';
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}
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return 0;
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}
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void S9xMSU1WritePort(int port, uint8 byte)
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{
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switch (port)
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{
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case 0:
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MSU1.MSU1_DATA_SEEK &= 0xFFFFFF00;
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MSU1.MSU1_DATA_SEEK |= byte << 0;
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break;
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case 1:
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MSU1.MSU1_DATA_SEEK &= 0xFFFF00FF;
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MSU1.MSU1_DATA_SEEK |= byte << 8;
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break;
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case 2:
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MSU1.MSU1_DATA_SEEK &= 0xFF00FFFF;
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MSU1.MSU1_DATA_SEEK |= byte << 16;
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break;
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case 3:
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MSU1.MSU1_DATA_SEEK &= 0x00FFFFFF;
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MSU1.MSU1_DATA_SEEK |= byte << 24;
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MSU1.MSU1_DATA_POS = MSU1.MSU1_DATA_SEEK;
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if(dataFile.good())
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dataFile.seekg(MSU1.MSU1_DATA_POS);
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break;
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case 4:
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MSU1.MSU1_TRACK_SEEK &= 0xFF00;
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MSU1.MSU1_TRACK_SEEK |= byte;
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break;
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case 5:
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MSU1.MSU1_TRACK_SEEK &= 0x00FF;
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MSU1.MSU1_TRACK_SEEK |= (byte << 8);
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MSU1.MSU1_CURRENT_TRACK = MSU1.MSU1_TRACK_SEEK;
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MSU1.MSU1_STATUS &= ~AudioPlaying;
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MSU1.MSU1_STATUS &= ~AudioRepeating;
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if (AudioOpen())
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{
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if (MSU1.MSU1_CURRENT_TRACK == MSU1.MSU1_RESUME_TRACK)
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{
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MSU1.MSU1_AUDIO_POS = MSU1.MSU1_RESUME_POS;
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MSU1.MSU1_RESUME_POS = 0;
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MSU1.MSU1_RESUME_TRACK = ~0;
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}
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else
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{
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MSU1.MSU1_AUDIO_POS = 8;
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}
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audioFile.seekg(MSU1.MSU1_AUDIO_POS);
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}
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break;
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case 6:
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MSU1.MSU1_VOLUME = byte;
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break;
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case 7:
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if (MSU1.MSU1_STATUS & (AudioBusy | AudioError))
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break;
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MSU1.MSU1_STATUS = (MSU1.MSU1_STATUS & ~0x30) | ((byte & 0x03) << 4);
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if ((byte & (Play | Resume)) == Resume)
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{
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MSU1.MSU1_RESUME_TRACK = MSU1.MSU1_CURRENT_TRACK;
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MSU1.MSU1_RESUME_POS = MSU1.MSU1_AUDIO_POS;
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}
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break;
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}
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}
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uint16 S9xMSU1Samples(void)
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{
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return bufPos - bufBegin;
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}
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void S9xMSU1SetOutput(int16 * out, int size)
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{
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bufPos = bufBegin = out;
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bufEnd = out + size;
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}
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void S9xMSU1PostLoadState(void)
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{
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if (DataOpen())
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{
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dataFile.seekg(MSU1.MSU1_DATA_POS);
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}
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if (MSU1.MSU1_STATUS & AudioPlaying)
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{
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if (AudioOpen())
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{
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audioFile.seekg(4);
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audioFile.read((char *)&audioLoopPos, 4);
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audioLoopPos = GET_LE32(&audioLoopPos);
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audioLoopPos <<= 2;
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audioLoopPos += 8;
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audioFile.seekg(MSU1.MSU1_AUDIO_POS);
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}
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else
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{
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MSU1.MSU1_STATUS &= ~(AudioPlaying | AudioRepeating);
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MSU1.MSU1_STATUS |= AudioError;
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}
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}
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bufPos = 0;
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bufBegin = 0;
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bufEnd = 0;
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partial_samples = 0;
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}
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