misc.cpp
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上传日期:2010-03-30
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文件大小:2k
源码类别:
VC书籍
开发平台:
Visual C++
- // VirtualDub - Video processing and capture application
- // Copyright (C) 1998-2001 Avery Lee
- //
- // This program 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 program 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 this program; if not, write to the Free Software
- // Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- #include <ctype.h>
- #include <wtypes.h>
- #include <mmsystem.h>
- #include "misc.h"
- long __declspec(naked) MulDivTrunc(long a, long b, long c) {
- __asm {
- mov eax,[esp+4]
- imul dword ptr [esp+8]
- idiv dword ptr [esp+12]
- ret
- }
- }
- int NearestLongValue(long v, const long *array, int array_size) {
- int i;
- for(i=1; i<array_size; i++)
- if (v*2 < array[i-1]+array[i])
- break;
- return i-1;
- }
- bool isEqualFOURCC(FOURCC fccA, FOURCC fccB) {
- int i;
- for(i=0; i<4; i++) {
- if (tolower((unsigned char)fccA) != tolower((unsigned char)fccB))
- return false;
- fccA>>=8;
- fccB>>=8;
- }
- return true;
- }
- FOURCC toupperFOURCC(FOURCC fcc) {
- return(toupper((unsigned char)(fcc>>24)) << 24)
- | (toupper((unsigned char)(fcc>>16)) << 16)
- | (toupper((unsigned char)(fcc>> 8)) << 8)
- | (toupper((unsigned char)(fcc )) );
- }