98 lines
2.8 KiB
C
98 lines
2.8 KiB
C
/*
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* mix.h
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*
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* Copyright (C) 2007 Matt Ownby
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*
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* This file is part of DAPHNE, a laserdisc arcade game emulator
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*
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* DAPHNE is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* DAPHNE is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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// mix.h
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#ifndef MIX_H
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#define MIX_H
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#ifdef MAC_OSX
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#include "mmxdefs.h"
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#endif
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#include <SDL.h> // for datatype defs
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// IMPORTANT: the MMX code depends on this structure beginning as it is displayed here!
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// Be very cautious about changing this struct!
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struct mix_s
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{
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void *pMixBuf;
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struct mix_s *pNext;
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};
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// TO USE THE MIX FUNCTIONS:
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// 1 - set g_pMixBufs to a pointer to a populated mix_s struct (that contains all your streams)
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// 2 - set g_pSampleDst to the destination stream
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// 3 - set g_uBytesToMix to how many bytes long all lines are (they all must be the same length).
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// IMPORTANT : g_uBytesToMix must be a multiple of 8, and must be >= 8!
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// 4 - run g_mix_func() and you're done!
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// we always want this function defined for the purpose of testing (releasetest.cpp)
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void mix_c();
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// Here we make some definitions so that the MMX/C code use identical syntax and variables
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#ifdef USE_MMX
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// For some reason, OSX was being retarded and insisted on putting _'s in front of all
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// assembly language variables. So we've compensated for this insane behavior.
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#if defined(MAC_OSX) || defined(WIN32)
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extern "C" void mix_mmx();
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extern "C" mix_s *asm_pMixBufs;
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extern "C" Uint8 *asm_pSampleDst;
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extern "C" Uint32 asm_uBytesToMix;
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#define g_pMixBufs asm_pMixBufs
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#define g_pSampleDst asm_pSampleDst
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#define g_uBytesToMix asm_uBytesToMix
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#else
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extern "C" void _mix_mmx();
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extern "C" mix_s *_asm_pMixBufs;
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extern "C" Uint8 *_asm_pSampleDst;
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extern "C" Uint32 _asm_uBytesToMix;
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#define g_pMixBufs _asm_pMixBufs
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#define g_pSampleDst _asm_pSampleDst
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#define g_uBytesToMix _asm_uBytesToMix
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#define mix_mmx _mix_mmx
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#endif // MAC_OSX
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// debug version gets some extra (slower) error checking
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#ifdef DEBUG
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#define g_mix_func debug_mix_mmx
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void debug_mix_mmx();
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#else
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// here is the fast release version
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#define g_mix_func mix_mmx
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#endif
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#else
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// here is where we go if we're not using MMX
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extern mix_s *g_pMixBufs;
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extern Uint8 *g_pSampleDst;
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extern Uint32 g_uBytesToMix;
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#define g_mix_func mix_c
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#endif // USE_MMX
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/////////////////////////////
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#endif
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