windows-server-2003/drivers/wdm/capture/mini/bt848/distr.cpp

// $Header: G:/SwDev/WDM/Video/bt848/rcs/Distr.cpp 1.2 1998/04/29 22:43:33 tomz Exp $

#include "mytypes.h"
#define label( x ) } x: _asm {

void CreateDistribution( WORD OrigFPS, WORD NeededFPS, PWORD lpwDistribution )
{
    _asm {
                push    edi

                mov     edi, dword ptr lpwDistribution
//                mov     es,  word ptr lpwPixWidthMap+2
                mov     ax, NeededFPS
                shl     eax, 16
                movzx   ecx, word ptr OrigFPS
                or      cx, cx
                jz      short end
                xor     edx, edx
                div     ecx
                mov     ebx, eax
                mov     eax, 8000H
label( L1 )     and     eax, 0FFFFh
                add     eax, ebx
                shld    edx, eax, 16
                mov     [edi], dx
                add     edi,2
                dec     cx
                jnz     short L1

label( end )
                pop     edi
    }
}