load_umx.cpp

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/*
 * This program is  free software; you can redistribute it  and 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.
 *
 * Authors: Olivier Lapicque <olivierl@jps.net>
*/

#include "stdafx.h"
#include "sndfile.h"

#define MODMAGIC_OFFSET (20+31*30+130)


BOOL CSoundFile::ReadUMX(const BYTE *lpStream, DWORD dwMemLength)
//---------------------------------------------------------------
{
        if ((!lpStream) || (dwMemLength < 0x800)) return FALSE;
        // Rip Mods from UMX
        if ((bswapLE32(*((DWORD *)(lpStream+0x20))) < dwMemLength)
         && (bswapLE32(*((DWORD *)(lpStream+0x18))) <= dwMemLength - 0x10)
         && (bswapLE32(*((DWORD *)(lpStream+0x18))) >= dwMemLength - 0x200))
        {
                for (UINT uscan=0x40; uscan<0x500; uscan++)
                {
                        DWORD dwScan = bswapLE32(*((DWORD *)(lpStream+uscan)));
                        // IT
                        if (dwScan == 0x4D504D49)
                        {
                                DWORD dwRipOfs = uscan;
                                return ReadIT(lpStream + dwRipOfs, dwMemLength - dwRipOfs);
                        }
                        // S3M
                        if (dwScan == 0x4D524353)
                        {
                                DWORD dwRipOfs = uscan - 44;
                                return ReadS3M(lpStream + dwRipOfs, dwMemLength - dwRipOfs);
                        }
                        // XM
                        if (!strnicmp((LPCSTR)(lpStream+uscan), "Extended Module", 15))
                        {
                                DWORD dwRipOfs = uscan;
                                return ReadXM(lpStream + dwRipOfs, dwMemLength - dwRipOfs);
                        }
                        // MOD
                        if ((uscan > MODMAGIC_OFFSET) && (dwScan == 0x2e4b2e4d))
                        {
                                DWORD dwRipOfs = uscan - MODMAGIC_OFFSET;
                                return ReadMod(lpStream+dwRipOfs, dwMemLength-dwRipOfs);
                        }
                }
        }
        return FALSE;
}

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