571 lines
16 KiB
C
571 lines
16 KiB
C
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/*
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*
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* iaverage.c Image averaging
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*
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* (C) Copyright Microsoft Corporation 1993. All rights reserved.
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*
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*/
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#include <windows.h>
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#include <windowsx.h>
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#include <mmsystem.h>
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#include <memory.h>
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#include <stdlib.h>
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#include <ctype.h>
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#include <memory.h>
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#include <string.h>
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#include <msvideo.h>
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#include "iaverage.h"
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#define WIDTHBYTES(i) ((unsigned)((i+31)&(~31))/8) /* ULONG aligned ! */
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#define DIBWIDTHBYTES(bi) (int)WIDTHBYTES((int)(bi).biWidth * (int)(bi).biBitCount)
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#define RGB16(r,g,b) ((((WORD)(r) >> 3) << 10) | \
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(((WORD)(g) >> 3) << 5) | \
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(((WORD)(b) >> 3) ) )
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typedef BYTE _huge * HPBYTE;
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typedef WORD _huge * HPWORD;
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typedef DWORD _huge * HPDWORD;
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/* Description:
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A sequence of images are averaged together using 16 bit
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accumulators for each of the Red, Green, and Blue components.
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The final processing step is to divide the accumulated values
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by the number of frames averaged, and transfer the results back
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into the destination DIB.
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Certain death will result if the image format is changed between
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iaverageInit and iaverageFini calls.
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*/
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//
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// table to map a 5bit index (0-31) to a 8 bit value (0-255)
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//
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static BYTE aw5to8[32] = {(BYTE)-1};
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/*
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* iaverageInit
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* Allocate memory for subsequent image averaging
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* Return FALSE on error
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*
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*/
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BOOL iaverageInit (LPIAVERAGE FAR * lppia, LPBITMAPINFO lpbi, HPALETTE hPal)
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{
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DWORD dwSizeImage;
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LPIAVERAGE lpia;
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int i;
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*lppia = NULL;
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// Check for legal DIB formats
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if (lpbi->bmiHeader.biCompression != BI_RGB)
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return FALSE;
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if (lpbi->bmiHeader.biBitCount != 8 &&
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lpbi->bmiHeader.biBitCount != 16 &&
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lpbi->bmiHeader.biBitCount != 24 &&
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lpbi->bmiHeader.biBitCount != 32)
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return FALSE;
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//
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// init the 5bit to 8bit conversion table.
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//
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if (aw5to8[0] != 0)
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for (i=0; i<32; i++)
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aw5to8[i] = (BYTE)(i * 255 / 31);
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// Alloc memory for the image average structure
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lpia = (LPIAVERAGE) GlobalAllocPtr (GHND, sizeof (IAVERAGE));
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if (!lpia)
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return FALSE;
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// Save a copy of the header
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lpia->bi.bmiHeader = lpbi->bmiHeader;
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// and a copy of the color table and an inverse mapping table
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// if the image is 8 bit
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if (lpbi->bmiHeader.biBitCount == 8) {
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WORD r, g, b;
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LPBYTE lpB;
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hmemcpy (lpia->bi.bmiColors,
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lpbi->bmiColors,
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lpbi->bmiHeader.biClrUsed * sizeof (RGBQUAD));
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// Allocate and init the inverse LUT
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lpia->lpInverseMap= (LPBYTE) GlobalAllocPtr (GHND, 1024L * 32);
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lpB = lpia-> lpInverseMap;
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for (r = 0; r < 256; r += 8)
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for (g = 0; g < 256; g += 8)
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for (b = 0; b < 256; b += 8)
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*lpB++ = (BYTE) GetNearestPaletteIndex (hPal, RGB(r,g,b));
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}
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dwSizeImage = lpbi->bmiHeader.biSizeImage;
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lpia->lpRGB = (LPINT) GlobalAllocPtr (GHND,
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dwSizeImage * sizeof (WORD) * 3);
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if (lpia->lpRGB == NULL) {
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// Allocation failed, clean up
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iaverageFini (lpia);
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return FALSE;
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}
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*lppia = lpia;
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return TRUE;
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}
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/*
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* iaverageFini
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* Free memory used for image averaging
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* and the iaverage structure itself
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*
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*/
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BOOL iaverageFini (LPIAVERAGE lpia)
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{
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if (lpia == NULL)
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return FALSE;
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if (lpia->lpInverseMap)
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GlobalFreePtr (lpia->lpInverseMap);
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if (lpia->lpRGB)
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GlobalFreePtr (lpia->lpRGB);
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GlobalFreePtr (lpia);
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return TRUE;
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}
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/*
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* iaverageZero
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* Zeros the accumulator
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*
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*/
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BOOL iaverageZero (LPIAVERAGE lpia)
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{
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DWORD dwC;
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HPWORD hpW;
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if (lpia == NULL)
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return FALSE;
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hpW = (HPWORD) lpia->lpRGB;
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dwC = lpia->bi.bmiHeader.biSizeImage * 3;
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while (--dwC)
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*hpW++ = 0;
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lpia-> iCount = 0;
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return TRUE;
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}
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/*
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* iaverageSum
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* Add the current image into the accumulator
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* Image format must be 16 or 24 bit RGB
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*/
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BOOL iaverageSum (LPIAVERAGE lpia, LPVOID lpBits)
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{
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HPWORD hpRGB;
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DWORD dwC;
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WORD wRGB16;
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HPWORD hpW;
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HPBYTE hpB;
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WORD w;
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if (lpia == NULL)
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return FALSE;
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hpRGB = (HPWORD) lpia->lpRGB;
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if (lpia->bi.bmiHeader.biBitCount == 8) {
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hpB = (HPBYTE) lpBits;
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for (dwC = lpia->bi.bmiHeader.biSizeImage; --dwC; ) {
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w = (WORD) *hpB++;
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*hpRGB++ += lpia->bi.bmiColors[w].rgbBlue;
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*hpRGB++ += lpia->bi.bmiColors[w].rgbGreen;
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*hpRGB++ += lpia->bi.bmiColors[w].rgbRed;
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}
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}
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else if (lpia->bi.bmiHeader.biBitCount == 16) {
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hpW = (HPWORD) lpBits;
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for (dwC = lpia->bi.bmiHeader.biSizeImage / 2; --dwC; ) {
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wRGB16 = *hpW++;
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*hpRGB++ += aw5to8 [wRGB16 & 0x1f]; // b
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*hpRGB++ += aw5to8 [(wRGB16 >> 5) & 0x1f]; // g
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*hpRGB++ += aw5to8 [(wRGB16 >> 10) & 0x1f]; // r
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}
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}
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else if (lpia->bi.bmiHeader.biBitCount == 24) {
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hpB = (HPBYTE) lpBits;
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for (dwC = lpia->bi.bmiHeader.biSizeImage; --dwC; ) {
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*hpRGB++ += *hpB++;
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}
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}
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else if (lpia->bi.bmiHeader.biBitCount == 32) {
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hpB = (HPBYTE) lpBits;
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for (dwC = lpia->bi.bmiHeader.biSizeImage / 4; --dwC; ) {
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*hpRGB++ += *hpB++; // b
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*hpRGB++ += *hpB++; // g
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*hpRGB++ += *hpB++; // r
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hpB++;
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}
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}
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lpia-> iCount++; // Image counter
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return TRUE;
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}
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/*
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* iaverageDivide
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* Divide by the number of images captured, and xfer back into the
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* destination DIB.
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*
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*/
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BOOL iaverageDivide (LPIAVERAGE lpia, LPVOID lpBits)
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{
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HPWORD hpRGB;
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WORD r, g, b, w;
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DWORD dwC;
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HPWORD hpW;
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HPBYTE hpB;
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if (lpia == NULL || lpia-> iCount == 0)
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return FALSE;
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hpRGB = (HPWORD) lpia->lpRGB;
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if (lpia->bi.bmiHeader.biBitCount == 8) {
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hpB = (HPBYTE) lpBits;
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for (dwC = lpia->bi.bmiHeader.biSizeImage; --dwC; ) {
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b = *hpRGB++ / lpia-> iCount;
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g = *hpRGB++ / lpia-> iCount;
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r = *hpRGB++ / lpia-> iCount;
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w = RGB16(r,g,b) & 0x7FFF;
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*hpB++ = * (lpia->lpInverseMap + w);
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}
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}
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else if (lpia->bi.bmiHeader.biBitCount == 16) {
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hpW = (HPWORD) lpBits;
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for (dwC = lpia->bi.bmiHeader.biSizeImage / 2; --dwC; ) {
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b = *hpRGB++ / lpia-> iCount;
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g = *hpRGB++ / lpia-> iCount;
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r = *hpRGB++ / lpia-> iCount;
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*hpW++ = RGB16 (r, g, b);
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}
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}
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else if (lpia->bi.bmiHeader.biBitCount == 24) {
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hpB = (HPBYTE) lpBits;
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for (dwC = lpia->bi.bmiHeader.biSizeImage; --dwC; ) {
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*hpB++ = (BYTE) (*hpRGB++ / lpia-> iCount);
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}
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}
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else if (lpia->bi.bmiHeader.biBitCount == 32) {
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hpB = (HPBYTE) lpBits;
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for (dwC = lpia->bi.bmiHeader.biSizeImage / 4; --dwC; ) {
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*hpB++ = (BYTE) (*hpRGB++ / lpia-> iCount); // b
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*hpB++ = (BYTE) (*hpRGB++ / lpia-> iCount); // g
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*hpB++ = (BYTE) (*hpRGB++ / lpia-> iCount); // r
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hpB++;
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}
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}
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return TRUE;
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}
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// The following appropriated from Toddla's CDIB
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/*****************************************************************************
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*
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* SumRGB
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*
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*****************************************************************************/
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#define SumRGB16(b0,b1,b2,b3) (\
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((((WORD)pal.palPalEntry[b0].peRed + \
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(WORD)pal.palPalEntry[b1].peRed + \
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(WORD)pal.palPalEntry[b2].peRed + \
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(WORD)pal.palPalEntry[b3].peRed) \
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& 0x03E) << 5) | \
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\
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((((WORD)pal.palPalEntry[b0].peGreen + \
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(WORD)pal.palPalEntry[b1].peGreen + \
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(WORD)pal.palPalEntry[b2].peGreen + \
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(WORD)pal.palPalEntry[b3].peGreen) \
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& 0x003E)) | \
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\
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((((WORD)pal.palPalEntry[b0].peBlue + \
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(WORD)pal.palPalEntry[b1].peBlue + \
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(WORD)pal.palPalEntry[b2].peBlue + \
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(WORD)pal.palPalEntry[b3].peBlue) \
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& 0x003E) >> 5) )
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/*****************************************************************************
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*
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* RGB16
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*
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*****************************************************************************/
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typedef struct { BYTE b,g,r; } RGB24;
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#define rgb16(r,g,b) (\
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((UINT)(r) << 10) | \
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((UINT)(g) << 5) | \
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((UINT)(b) << 0) )
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#define RGB16R(rgb) aw5to8[((UINT)(rgb) >> 10) & 0x1F]
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#define RGB16G(rgb) aw5to8[((UINT)(rgb) >> 5) & 0x1F]
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#define RGB16B(rgb) aw5to8[((UINT)(rgb) >> 0) & 0x1F]
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#define RGB16r(rgb) ((BYTE)((UINT)(rgb) >> 10) & 0x1F)
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#define RGB16g(rgb) ((BYTE)((UINT)(rgb) >> 5) & 0x1F)
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#define RGB16b(rgb) ((BYTE)((UINT)(rgb) >> 0) & 0x1F)
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/*****************************************************************************
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*
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* Pel() used for 24bit Crunch
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*
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*****************************************************************************/
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#define Pel(p,x) (BYTE)(BitCount == 1 ? Pel1(p,x) : \
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BitCount == 4 ? Pel4(p,x) : Pel8(p,x))
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#define Pel1(p,x) (BYTE)bit(((HPBYTE)(p))[(x)/8],7-((x)%8))
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#define Pel4(p,x) (BYTE)((x & 1) ? (((HPBYTE)(p))[(x)/2] & 15) : (((HPBYTE)(p))[(x)/2] >> 4))
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#define Pel8(p,x) (BYTE)(((HPBYTE)(p))[(x)])
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#define Pel16(p,x) (((HPWORD)(p))[(x)])
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#define Pel24(p,x) (((RGB24 _huge *)(p))[(x)])
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/*****************************************************************************
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*
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* CrunchDIB - shrink a DIB down by 2 with color averaging
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*
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* this routine works on 8, 16, 24, and 32 bpp DIBs
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*
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* this routine can't be used "in place"
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*
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*****************************************************************************/
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BOOL CrunchDIB(
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LPIAVERAGE lpia, // image averaging structure
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LPBITMAPINFOHEADER lpbiSrc, // BITMAPINFO of source
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LPVOID lpSrc, // input bits to crunch
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LPBITMAPINFOHEADER lpbiDst, // BITMAPINFO of dest
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LPVOID lpDst) // output bits to crunch
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{
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HPBYTE pbSrc;
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HPBYTE pbDst;
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HPBYTE pb;
|
||
|
|
HPWORD pw;
|
||
|
|
BYTE r,g,b,b0,b1,b2,b3;
|
||
|
|
WORD w0,w1,w2,w3;
|
||
|
|
RGB24 rgb0,rgb1,rgb2,rgb3;
|
||
|
|
int WidthBytesSrc;
|
||
|
|
int WidthBytesDst;
|
||
|
|
UINT x;
|
||
|
|
UINT y;
|
||
|
|
UINT dx;
|
||
|
|
UINT dy;
|
||
|
|
int i;
|
||
|
|
COLORREF rgb;
|
||
|
|
int BitCount;
|
||
|
|
UINT aw5to8[32];
|
||
|
|
|
||
|
|
struct {
|
||
|
|
WORD palVersion;
|
||
|
|
WORD palNumEntries;
|
||
|
|
PALETTEENTRY palPalEntry[256];
|
||
|
|
} pal;
|
||
|
|
|
||
|
|
if (lpbiSrc->biCompression != BI_RGB)
|
||
|
|
return FALSE;
|
||
|
|
|
||
|
|
BitCount = (int)lpbiSrc->biBitCount;
|
||
|
|
|
||
|
|
if (BitCount == 16)
|
||
|
|
for (i=0; i<32; i++)
|
||
|
|
aw5to8[i] = (UINT)i * 255u / 31u;
|
||
|
|
|
||
|
|
dx = (int)lpbiDst->biWidth;
|
||
|
|
WidthBytesDst = (((UINT)lpbiDst->biBitCount * dx + 31)&~31) / 8;
|
||
|
|
|
||
|
|
dy = (int)lpbiSrc->biHeight;
|
||
|
|
dx = (int)lpbiSrc->biWidth;
|
||
|
|
WidthBytesSrc = (((UINT)lpbiSrc->biBitCount * dx + 31)&~31) / 8;
|
||
|
|
|
||
|
|
dx &= ~1;
|
||
|
|
dy &= ~1;
|
||
|
|
|
||
|
|
pbSrc = lpSrc;
|
||
|
|
pbDst = lpDst;
|
||
|
|
|
||
|
|
if (lpbiSrc->biClrUsed == 0 && lpbiSrc->biBitCount <= 8)
|
||
|
|
lpbiSrc->biClrUsed = (1 << (int)lpbiSrc->biBitCount);
|
||
|
|
|
||
|
|
pal.palVersion = 0x300;
|
||
|
|
pal.palNumEntries = (int)lpbiSrc->biClrUsed;
|
||
|
|
|
||
|
|
for (i=0; i<(int)pal.palNumEntries; i++)
|
||
|
|
{
|
||
|
|
pal.palPalEntry[i].peRed = ((LPRGBQUAD)(lpbiSrc+1))[i].rgbRed;
|
||
|
|
pal.palPalEntry[i].peGreen = ((LPRGBQUAD)(lpbiSrc+1))[i].rgbGreen;
|
||
|
|
pal.palPalEntry[i].peBlue = ((LPRGBQUAD)(lpbiSrc+1))[i].rgbBlue;
|
||
|
|
pal.palPalEntry[i].peFlags = 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (lpbiDst->biBitCount == 8)
|
||
|
|
_fmemcpy(lpbiDst+1,lpbiSrc+1,(int)lpbiSrc->biClrUsed*sizeof(RGBQUAD));
|
||
|
|
|
||
|
|
if ((int)lpbiDst->biBitCount == (int)lpbiSrc->biBitCount)
|
||
|
|
{
|
||
|
|
switch((int)lpbiSrc->biBitCount)
|
||
|
|
{
|
||
|
|
case 8:
|
||
|
|
for (y=0; y<dy; y+=2)
|
||
|
|
{
|
||
|
|
pb = pbDst;
|
||
|
|
|
||
|
|
for (x=0; x<dx; x+=2)
|
||
|
|
{
|
||
|
|
b0 = Pel8(pbSrc,x);
|
||
|
|
b1 = Pel8(pbSrc+WidthBytesSrc, x);
|
||
|
|
b2 = Pel8(pbSrc,x+1);
|
||
|
|
b3 = Pel8(pbSrc+WidthBytesSrc,x+1);
|
||
|
|
|
||
|
|
r = (BYTE) ((
|
||
|
|
(WORD)pal.palPalEntry[b0].peRed +
|
||
|
|
(WORD)pal.palPalEntry[b1].peRed +
|
||
|
|
(WORD)pal.palPalEntry[b2].peRed +
|
||
|
|
(WORD)pal.palPalEntry[b3].peRed) >> 2);
|
||
|
|
|
||
|
|
g = (BYTE) ((
|
||
|
|
(WORD)pal.palPalEntry[b0].peGreen +
|
||
|
|
(WORD)pal.palPalEntry[b1].peGreen +
|
||
|
|
(WORD)pal.palPalEntry[b2].peGreen +
|
||
|
|
(WORD)pal.palPalEntry[b3].peGreen) >> 2);
|
||
|
|
|
||
|
|
b = (BYTE) ((
|
||
|
|
(WORD)pal.palPalEntry[b0].peBlue +
|
||
|
|
(WORD)pal.palPalEntry[b1].peBlue +
|
||
|
|
(WORD)pal.palPalEntry[b2].peBlue +
|
||
|
|
(WORD)pal.palPalEntry[b3].peBlue) >> 2);
|
||
|
|
|
||
|
|
*pb++ = (BYTE)(*(lpia->lpInverseMap +
|
||
|
|
RGB16 (r, g, b)));
|
||
|
|
}
|
||
|
|
|
||
|
|
pbSrc += WidthBytesSrc*2;
|
||
|
|
pbDst += WidthBytesDst;
|
||
|
|
}
|
||
|
|
break;
|
||
|
|
|
||
|
|
case 16:
|
||
|
|
for (y=0; y<dy; y+=2)
|
||
|
|
{
|
||
|
|
pw = (HPWORD)pbDst;
|
||
|
|
|
||
|
|
for (x=0; x<dx; x += 2)
|
||
|
|
{
|
||
|
|
w0 = Pel16(pbSrc,x);
|
||
|
|
w1 = Pel16(pbSrc,x+1);
|
||
|
|
w2 = Pel16(pbSrc+WidthBytesSrc,x);
|
||
|
|
w3 = Pel16(pbSrc+WidthBytesSrc,x+1);
|
||
|
|
|
||
|
|
r = ((BYTE)RGB16r(w0) + RGB16r(w1) + RGB16r(w2) + RGB16r(w3)) >> 2;
|
||
|
|
g = ((BYTE)RGB16g(w0) + RGB16g(w1) + RGB16g(w2) + RGB16g(w3)) >> 2;
|
||
|
|
b = ((BYTE)RGB16b(w0) + RGB16b(w1) + RGB16b(w2) + RGB16b(w3)) >> 2;
|
||
|
|
|
||
|
|
*pw++ = rgb16(r,g,b);
|
||
|
|
}
|
||
|
|
|
||
|
|
pbSrc += WidthBytesSrc*2;
|
||
|
|
pbDst += WidthBytesDst;
|
||
|
|
}
|
||
|
|
break;
|
||
|
|
|
||
|
|
case 24:
|
||
|
|
for (y=0; y<dy; y+=2)
|
||
|
|
{
|
||
|
|
pb = pbDst;
|
||
|
|
|
||
|
|
for (x=0; x<dx; x += 2)
|
||
|
|
{
|
||
|
|
rgb0 = Pel24(pbSrc,x);
|
||
|
|
rgb1 = Pel24(pbSrc,x+1);
|
||
|
|
rgb2 = Pel24(pbSrc+WidthBytesSrc,x);
|
||
|
|
rgb3 = Pel24(pbSrc+WidthBytesSrc,x+1);
|
||
|
|
|
||
|
|
rgb = RGB(
|
||
|
|
((UINT)rgb0.r + rgb1.r + rgb2.r + rgb3.r)/4,
|
||
|
|
((UINT)rgb0.g + rgb1.g + rgb2.g + rgb3.g)/4,
|
||
|
|
((UINT)rgb0.b + rgb1.b + rgb2.b + rgb3.b)/4);
|
||
|
|
|
||
|
|
*pb++ = GetBValue(rgb);
|
||
|
|
*pb++ = GetGValue(rgb);
|
||
|
|
*pb++ = GetRValue(rgb);
|
||
|
|
}
|
||
|
|
|
||
|
|
pbSrc += WidthBytesSrc*2;
|
||
|
|
pbDst += WidthBytesDst;
|
||
|
|
}
|
||
|
|
break;
|
||
|
|
|
||
|
|
case 32:
|
||
|
|
for (y=0; y<dy; y+=2)
|
||
|
|
{
|
||
|
|
pb = pbDst;
|
||
|
|
|
||
|
|
for (x=0; x<dx; x += 2)
|
||
|
|
{
|
||
|
|
rgb0 = Pel24(pbSrc,x);
|
||
|
|
rgb1 = Pel24(pbSrc,x+1);
|
||
|
|
rgb2 = Pel24(pbSrc+WidthBytesSrc,x);
|
||
|
|
rgb3 = Pel24(pbSrc+WidthBytesSrc,x+1);
|
||
|
|
|
||
|
|
rgb = RGB(
|
||
|
|
((UINT)rgb0.r + rgb1.r + rgb2.r + rgb3.r)/4,
|
||
|
|
((UINT)rgb0.g + rgb1.g + rgb2.g + rgb3.g)/4,
|
||
|
|
((UINT)rgb0.b + rgb1.b + rgb2.b + rgb3.b)/4);
|
||
|
|
|
||
|
|
*pb++ = GetBValue(rgb);
|
||
|
|
*pb++ = GetGValue(rgb);
|
||
|
|
*pb++ = GetRValue(rgb);
|
||
|
|
pb++;
|
||
|
|
}
|
||
|
|
|
||
|
|
pbSrc += WidthBytesSrc*2;
|
||
|
|
pbDst += WidthBytesDst;
|
||
|
|
}
|
||
|
|
break;
|
||
|
|
|
||
|
|
default:
|
||
|
|
return FALSE;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
return FALSE;
|
||
|
|
}
|
||
|
|
|
||
|
|
return TRUE;
|
||
|
|
}
|