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wine/dlls/msrle32/msrle32.c
Andrew Talbot bea2ba50cf msrle32: Constify some variables.
2007-06-15 12:40:51 +02:00

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/*
* Copyright 2002-2003 Michael Günnewig
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
*/
/* TODO:
* - some improvements possible
* - implement DecompressSetPalette? -- do we need it for anything?
*/
#include <assert.h>
#include "msrle_private.h"
#include "winnls.h"
#include "winuser.h"
#include "wine/debug.h"
WINE_DEFAULT_DEBUG_CHANNEL(msrle32);
static HINSTANCE MSRLE32_hModule = 0;
#define ABS(a) ((a) < 0 ? -(a) : (a))
#define SQR(a) ((a) * (a))
#define QUALITY_to_DIST(q) (ICQUALITY_HIGH - q)
static inline WORD ColorCmp(WORD clr1, WORD clr2)
{
register UINT a = (clr1-clr2);
return SQR(a);
}
static inline WORD Intensity(RGBQUAD clr)
{
return (30 * clr.rgbRed + 59 * clr.rgbGreen + 11 * clr.rgbBlue)/4;
}
#define GetRawPixel(lpbi,lp,x) \
((lpbi)->biBitCount == 1 ? ((lp)[(x)/8] >> (8 - (x)%8)) & 1 : \
((lpbi)->biBitCount == 4 ? ((lp)[(x)/2] >> (4 * (1 - (x)%2))) & 15 : lp[x]))
/*****************************************************************************/
/* utility functions */
static BOOL isSupportedDIB(LPCBITMAPINFOHEADER lpbi);
static BOOL isSupportedMRLE(LPCBITMAPINFOHEADER lpbi);
static BYTE MSRLE32_GetNearestPaletteIndex(UINT count, const RGBQUAD *clrs, RGBQUAD clr);
/* compression functions */
static void computeInternalFrame(CodecInfo *pi, LPCBITMAPINFOHEADER lpbiIn, const BYTE *lpIn);
static LONG MSRLE32_GetMaxCompressedSize(LPCBITMAPINFOHEADER lpbi);
static LRESULT MSRLE32_CompressRLE4(const CodecInfo *pi, LPCBITMAPINFOHEADER lpbiIn,
const BYTE *lpIn, LPBITMAPINFOHEADER lpbiOut,
LPBYTE lpOut, BOOL isKey);
static LRESULT MSRLE32_CompressRLE8(const CodecInfo *pi, LPCBITMAPINFOHEADER lpbiIn,
const BYTE *lpIn, LPBITMAPINFOHEADER lpbiOut,
LPBYTE lpOut, BOOL isKey);
/* decompression functions */
static LRESULT MSRLE32_DecompressRLE4(const CodecInfo *pi, LPCBITMAPINFOHEADER lpbi,
const BYTE *lpIn, LPBYTE lpOut);
static LRESULT MSRLE32_DecompressRLE8(const CodecInfo *pi, LPCBITMAPINFOHEADER lpbi,
const BYTE *lpIn, LPBYTE lpOut);
/* API functions */
static LRESULT CompressGetFormat(CodecInfo *pi, LPCBITMAPINFOHEADER lpbiIn,
LPBITMAPINFOHEADER lpbiOut);
static LRESULT CompressGetSize(CodecInfo *pi, LPCBITMAPINFOHEADER lpbiIn,
LPCBITMAPINFOHEADER lpbiOut);
static LRESULT CompressQuery(const CodecInfo *pi, LPCBITMAPINFOHEADER lpbiIn,
LPCBITMAPINFOHEADER lpbiOut);
static LRESULT CompressBegin(CodecInfo *pi, LPCBITMAPINFOHEADER lpbiIn,
LPCBITMAPINFOHEADER lpbiOut);
static LRESULT Compress(CodecInfo *pi, ICCOMPRESS* lpic, DWORD dwSize);
static LRESULT CompressEnd(CodecInfo *pi);
static LRESULT DecompressGetFormat(CodecInfo *pi, LPCBITMAPINFOHEADER lpbiIn,
LPBITMAPINFOHEADER lpbiOut);
static LRESULT DecompressQuery(CodecInfo *pi, LPCBITMAPINFOHEADER lpbiIn,
LPCBITMAPINFOHEADER lpbiOut);
static LRESULT DecompressBegin(CodecInfo *pi, LPCBITMAPINFOHEADER lpbiIn,
LPCBITMAPINFOHEADER lpbiOut);
static LRESULT Decompress(CodecInfo *pi, ICDECOMPRESS *pic, DWORD dwSize);
static LRESULT DecompressEnd(CodecInfo *pi);
static LRESULT DecompressGetPalette(CodecInfo *pi, LPCBITMAPINFOHEADER lpbiIn,
LPBITMAPINFOHEADER lpbiOut);
/*****************************************************************************/
static BOOL isSupportedMRLE(LPCBITMAPINFOHEADER lpbi)
{
/* pre-conditions */
assert(lpbi != NULL);
if (lpbi->biSize < sizeof(BITMAPINFOHEADER) ||
lpbi->biPlanes != 1)
return FALSE;
if (lpbi->biCompression == BI_RLE4) {
if (lpbi->biBitCount != 4 ||
(lpbi->biWidth % 2) != 0)
return FALSE;
} else if (lpbi->biCompression == BI_RLE8) {
if (lpbi->biBitCount != 8)
return FALSE;
} else
return FALSE;
return TRUE;
}
static BOOL isSupportedDIB(LPCBITMAPINFOHEADER lpbi)
{
/* pre-conditions */
assert(lpbi != NULL);
/* check structure version/planes/compression */
if (lpbi->biSize < sizeof(BITMAPINFOHEADER) ||
lpbi->biPlanes != 1)
return FALSE;
if (lpbi->biCompression != BI_RGB &&
lpbi->biCompression != BI_BITFIELDS)
return FALSE;
/* check bit-depth */
if (lpbi->biBitCount != 1 &&
lpbi->biBitCount != 4 &&
lpbi->biBitCount != 8 &&
lpbi->biBitCount != 15 &&
lpbi->biBitCount != 16 &&
lpbi->biBitCount != 24 &&
lpbi->biBitCount != 32)
return FALSE;
/* check for size(s) */
if (!lpbi->biWidth || !lpbi->biHeight)
return FALSE; /* image with zero size, makes no sense so error ! */
if (DIBWIDTHBYTES(*lpbi) * (DWORD)lpbi->biHeight >= (1UL << 31) - 1)
return FALSE; /* image too big ! */
/* check for nonexistent colortable for hi- and true-color DIB's */
if (lpbi->biBitCount >= 15 && lpbi->biClrUsed > 0)
return FALSE;
return TRUE;
}
static BYTE MSRLE32_GetNearestPaletteIndex(UINT count, const RGBQUAD *clrs, RGBQUAD clr)
{
INT diff = 0x00FFFFFF;
UINT i;
UINT idx = 0;
/* pre-conditions */
assert(clrs != NULL);
for (i = 0; i < count; i++) {
int r = ((int)clrs[i].rgbRed - (int)clr.rgbRed);
int g = ((int)clrs[i].rgbGreen - (int)clr.rgbGreen);
int b = ((int)clrs[i].rgbBlue - (int)clr.rgbBlue);
r = r*r + g*g + b*b;
if (r < diff) {
idx = i;
diff = r;
if (diff == 0)
break;
}
}
return idx;
}
/*****************************************************************************/
void computeInternalFrame(CodecInfo *pi, LPCBITMAPINFOHEADER lpbiIn, const BYTE *lpIn)
{
WORD wIntensityTbl[256];
DWORD lInLine, lOutLine;
LPWORD lpOut;
UINT i;
LONG y;
/* pre-conditions */
assert(pi != NULL && lpbiIn != NULL && lpIn != NULL);
assert(pi->pCurFrame != NULL);
lInLine = DIBWIDTHBYTES(*lpbiIn);
lOutLine = WIDTHBYTES((WORD)lpbiIn->biWidth * 8u * sizeof(WORD)) / 2u;
lpOut = pi->pCurFrame;
assert(lpbiIn->biClrUsed != 0);
{
const RGBQUAD *lp =
(const RGBQUAD *)((const BYTE*)lpbiIn + lpbiIn->biSize);
for (i = 0; i < lpbiIn->biClrUsed; i++)
wIntensityTbl[i] = Intensity(lp[i]);
}
for (y = 0; y < lpbiIn->biHeight; y++) {
LONG x;
switch (lpbiIn->biBitCount) {
case 1:
for (x = 0; x < lpbiIn->biWidth / 8; x++) {
for (i = 0; i < 7; i++)
lpOut[8 * x + i] = wIntensityTbl[(lpIn[x] >> (7 - i)) & 1];
}
break;
case 4:
for (x = 0; x < lpbiIn->biWidth / 2; x++) {
lpOut[2 * x + 0] = wIntensityTbl[(lpIn[x] >> 4)];
lpOut[2 * x + 1] = wIntensityTbl[(lpIn[x] & 0x0F)];
}
break;
case 8:
for (x = 0; x < lpbiIn->biWidth; x++)
lpOut[x] = wIntensityTbl[lpIn[x]];
break;
}
lpIn += lInLine;
lpOut += lOutLine;
}
}
static LONG MSRLE32_GetMaxCompressedSize(LPCBITMAPINFOHEADER lpbi)
{
LONG a, b, size;
/* pre-condition */
assert(lpbi != NULL);
a = lpbi->biWidth / 255;
b = lpbi->biWidth % 255;
if (lpbi->biBitCount <= 4) {
a /= 2;
b /= 2;
}
size = (2 + a * (2 + ((a + 2) & ~2)) + b * (2 + ((b + 2) & ~2)));
return size * lpbi->biHeight;
}
/* lpP => current pos in previous frame
* lpA => previous pos in current frame
* lpB => current pos in current frame
*/
static INT countDiffRLE4(const WORD *lpP, const WORD *lpA, const WORD *lpB, INT pos, LONG lDist, LONG width)
{
INT count;
WORD clr1, clr2;
/* pre-conditions */
assert(lpA && lpB && lDist >= 0 && width > 0);
if (pos >= width)
return 0;
if (pos+1 == width)
return 1;
clr1 = lpB[pos++];
clr2 = lpB[pos];
count = 2;
while (pos + 1 < width) {
WORD clr3, clr4;
clr3 = lpB[++pos];
if (pos + 1 >= width)
return count + 1;
clr4 = lpB[++pos];
if (ColorCmp(clr1, clr3) <= lDist &&
ColorCmp(clr2, clr4) <= lDist) {
/* diff at end? -- look-ahead for at least ?? more encodable pixels */
if (pos + 2 < width && ColorCmp(clr1,lpB[pos+1]) <= lDist &&
ColorCmp(clr2,lpB[pos+2]) <= lDist) {
if (pos + 4 < width && ColorCmp(lpB[pos+1],lpB[pos+3]) <= lDist &&
ColorCmp(lpB[pos+2],lpB[pos+4]) <= lDist)
return count - 3; /* followed by at least 4 encodable pixels */
return count - 2;
}
} else if (lpP != NULL && ColorCmp(lpP[pos], lpB[pos]) <= lDist) {
/* 'compare' with previous frame for end of diff */
INT count2 = 0;
/* FIXME */
if (count2 >= 8)
return count;
pos -= count2;
}
count += 2;
clr1 = clr3;
clr2 = clr4;
}
return count;
}
/* lpP => current pos in previous frame
* lpA => previous pos in current frame
* lpB => current pos in current frame
*/
static INT countDiffRLE8(const WORD *lpP, const WORD *lpA, const WORD *lpB, INT pos, LONG lDist, LONG width)
{
INT count;
for (count = 0; pos < width; pos++, count++) {
if (ColorCmp(lpA[pos], lpB[pos]) <= lDist) {
/* diff at end? -- look-ahead for some more encodable pixel */
if (pos + 1 < width && ColorCmp(lpB[pos], lpB[pos+1]) <= lDist)
return count - 1;
if (pos + 2 < width && ColorCmp(lpB[pos+1], lpB[pos+2]) <= lDist)
return count - 1;
} else if (lpP != NULL && ColorCmp(lpP[pos], lpB[pos]) <= lDist) {
/* 'compare' with previous frame for end of diff */
INT count2 = 0;
for (count2 = 0, pos++; pos < width && count2 <= 5; pos++, count2++) {
if (ColorCmp(lpP[pos], lpB[pos]) > lDist)
break;
}
if (count2 > 4)
return count;
pos -= count2;
}
}
return count;
}
static INT MSRLE32_CompressRLE4Line(const CodecInfo *pi, const WORD *lpP,
const WORD *lpC, LPCBITMAPINFOHEADER lpbi,
const BYTE *lpIn, LONG lDist,
INT x, LPBYTE *ppOut,
DWORD *lpSizeImage)
{
LPBYTE lpOut = *ppOut;
INT count, pos;
WORD clr1, clr2;
/* try to encode as many pixel as possible */
count = 1;
pos = x;
clr1 = lpC[pos++];
if (pos < lpbi->biWidth) {
clr2 = lpC[pos];
for (++count; pos + 1 < lpbi->biWidth; ) {
++pos;
if (ColorCmp(clr1, lpC[pos]) > lDist)
break;
count++;
if (pos + 1 >= lpbi->biWidth)
break;
++pos;
if (ColorCmp(clr2, lpC[pos]) > lDist)
break;
count++;
}
}
if (count < 4) {
/* add some pixel for absoluting if possible */
count += countDiffRLE4(lpP, lpC - 1, lpC, pos-1, lDist, lpbi->biWidth);
assert(count > 0);
/* check for near end of line */
if (x + count > lpbi->biWidth)
count = lpbi->biWidth - x;
/* absolute pixel(s) in groups of at least 3 and at most 254 pixels */
while (count > 2) {
INT i;
INT size = min(count, 254);
int bytes = ((size + 1) & (~1)) / 2;
BOOL extra_byte = bytes & 0x01;
*lpSizeImage += 2 + bytes + extra_byte;
assert(((*lpSizeImage) % 2) == 0);
count -= size;
*lpOut++ = 0;
*lpOut++ = size;
for (i = 0; i < size; i += 2) {
clr1 = pi->palette_map[GetRawPixel(lpbi,lpIn,x)];
x++;
if (i + 1 < size) {
clr2 = pi->palette_map[GetRawPixel(lpbi,lpIn,x)];
x++;
} else
clr2 = 0;
*lpOut++ = (clr1 << 4) | clr2;
}
if (extra_byte)
*lpOut++ = 0;
}
if (count > 0) {
/* too little for absoluting so we must encode them */
assert(count <= 2);
*lpSizeImage += 2;
clr1 = pi->palette_map[GetRawPixel(lpbi,lpIn,x)];
x++;
if (count == 2) {
clr2 = pi->palette_map[GetRawPixel(lpbi,lpIn,x)];
x++;
} else
clr2 = 0;
*lpOut++ = count;
*lpOut++ = (clr1 << 4) | clr2;
}
} else {
/* encode count pixel(s) */
clr1 = ((pi->palette_map[GetRawPixel(lpbi,lpIn,x)] << 4) |
pi->palette_map[GetRawPixel(lpbi,lpIn,x + 1)]);
x += count;
while (count > 0) {
INT size = min(count, 254);
*lpSizeImage += 2;
count -= size;
*lpOut++ = size;
*lpOut++ = clr1;
}
}
*ppOut = lpOut;
return x;
}
static INT MSRLE32_CompressRLE8Line(const CodecInfo *pi, const WORD *lpP,
const WORD *lpC, LPCBITMAPINFOHEADER lpbi,
const BYTE *lpIn, LONG lDist,
INT x, LPBYTE *ppOut,
DWORD *lpSizeImage)
{
LPBYTE lpOut = *ppOut;
INT count, pos;
WORD clr;
assert(lpbi->biBitCount <= 8);
assert(lpbi->biCompression == BI_RGB);
/* try to encode as much as possible */
pos = x;
clr = lpC[pos++];
for (count = 1; pos < lpbi->biWidth; count++) {
if (ColorCmp(clr, lpC[pos++]) > lDist)
break;
}
if (count < 2) {
/* add some more pixels for absoluting if possible */
count += countDiffRLE8(lpP, lpC - 1, lpC, pos-1, lDist, lpbi->biWidth);
assert(count > 0);
/* check for over end of line */
if (x + count > lpbi->biWidth)
count = lpbi->biWidth - x;
/* absolute pixel(s) in groups of at least 3 and at most 255 pixels */
while (count > 2) {
INT i;
INT size = min(count, 255);
BOOL extra_byte = size % 2;
*lpSizeImage += 2 + size + extra_byte;
count -= size;
*lpOut++ = 0;
*lpOut++ = size;
for (i = 0; i < size; i++) {
*lpOut++ = pi->palette_map[GetRawPixel(lpbi,lpIn,x)];
x++;
}
if (extra_byte)
*lpOut++ = 0;
}
if (count > 0) {
/* too little for absoluting so we must encode them even if it's expensive! */
assert(count <= 2);
*lpSizeImage += 2 * count;
*lpOut++ = 1;
*lpOut++ = pi->palette_map[GetRawPixel(lpbi,lpIn,x)];
x++;
if (count == 2) {
*lpOut++ = 1;
*lpOut++ = pi->palette_map[GetRawPixel(lpbi,lpIn,x)];
x++;
}
}
} else {
/* encode count pixel(s) */
clr = pi->palette_map[GetRawPixel(lpbi,lpIn,x)];
/* optimize end of line */
if (x + count + 1 == lpbi->biWidth)
count++;
x += count;
while (count > 0) {
INT size = min(count, 255);
*lpSizeImage += 2;
count -= size;
*lpOut++ = size;
*lpOut++ = clr;
}
}
*ppOut = lpOut;
return x;
}
LRESULT MSRLE32_CompressRLE4(const CodecInfo *pi, LPCBITMAPINFOHEADER lpbiIn,
const BYTE *lpIn, LPBITMAPINFOHEADER lpbiOut,
LPBYTE lpOut, BOOL isKey)
{
LPWORD lpC;
LONG lLine, lInLine, lDist;
LPBYTE lpOutStart = lpOut;
/* pre-conditions */
assert(pi != NULL && lpbiOut != NULL);
assert(lpIn != NULL && lpOut != NULL);
assert(pi->pCurFrame != NULL);
lpC = pi->pCurFrame;
lDist = QUALITY_to_DIST(pi->dwQuality);
lInLine = DIBWIDTHBYTES(*lpbiIn);
lLine = WIDTHBYTES(lpbiOut->biWidth * 16) / 2;
lpbiOut->biSizeImage = 0;
if (isKey) {
/* keyframe -- convert internal frame to output format */
INT x, y;
for (y = 0; y < lpbiOut->biHeight; y++) {
x = 0;
do {
x = MSRLE32_CompressRLE4Line(pi, NULL, lpC, lpbiIn, lpIn, lDist, x,
&lpOut, &lpbiOut->biSizeImage);
} while (x < lpbiOut->biWidth);
lpC += lLine;
lpIn += lInLine;
/* add EOL -- end of line */
lpbiOut->biSizeImage += 2;
*(LPWORD)lpOut = 0;
lpOut += sizeof(WORD);
assert(lpOut == (lpOutStart + lpbiOut->biSizeImage));
}
} else {
/* delta-frame -- compute delta between last and this internal frame */
LPWORD lpP;
INT x, y;
INT jumpx, jumpy;
assert(pi->pPrevFrame != NULL);
lpP = pi->pPrevFrame;
jumpy = 0;
jumpx = -1;
for (y = 0; y < lpbiOut->biHeight; y++) {
x = 0;
do {
INT count, pos;
if (jumpx == -1)
jumpx = x;
for (count = 0, pos = x; pos < lpbiOut->biWidth; pos++, count++) {
if (ColorCmp(lpP[pos], lpC[pos]) > lDist)
break;
}
if (pos == lpbiOut->biWidth && count > 8) {
/* (count > 8) secures that we will save space */
jumpy++;
break;
} else if (jumpy || jumpx != pos) {
/* time to jump */
assert(jumpx != -1);
if (pos < jumpx) {
/* can only jump in positive direction -- jump until EOL, EOL */
INT w = lpbiOut->biWidth - jumpx;
assert(jumpy > 0);
assert(w >= 4);
jumpx = 0;
jumpy--;
/* if (w % 255 == 2) then equal costs
* else if (w % 255 < 4 && we could encode all) then 2 bytes too expensive
* else it will be cheaper
*/
while (w > 0) {
lpbiOut->biSizeImage += 4;
*lpOut++ = 0;
*lpOut++ = 2;
*lpOut = min(w, 255);
w -= *lpOut++;
*lpOut++ = 0;
}
/* add EOL -- end of line */
lpbiOut->biSizeImage += 2;
*((LPWORD)lpOut) = 0;
lpOut += sizeof(WORD);
}
/* FIXME: if (jumpy == 0 && could encode all) then jump too expensive */
/* write out real jump(s) */
while (jumpy || pos != jumpx) {
lpbiOut->biSizeImage += 4;
*lpOut++ = 0;
*lpOut++ = 2;
*lpOut = min(pos - jumpx, 255);
x += *lpOut;
jumpx += *lpOut++;
*lpOut = min(jumpy, 255);
jumpy -= *lpOut++;
}
jumpy = 0;
}
jumpx = -1;
if (x < lpbiOut->biWidth) {
/* skipped the 'same' things corresponding to previous frame */
x = MSRLE32_CompressRLE4Line(pi, lpP, lpC, lpbiIn, lpIn, lDist, x,
&lpOut, &lpbiOut->biSizeImage);
}
} while (x < lpbiOut->biWidth);
lpP += lLine;
lpC += lLine;
lpIn += lInLine;
if (jumpy == 0) {
assert(jumpx == -1);
/* add EOL -- end of line */
lpbiOut->biSizeImage += 2;
*((LPWORD)lpOut) = 0;
lpOut += sizeof(WORD);
assert(lpOut == lpOutStart + lpbiOut->biSizeImage);
}
}
/* add EOL -- will be changed to EOI */
lpbiOut->biSizeImage += 2;
*((LPWORD)lpOut) = 0;
lpOut += sizeof(WORD);
}
/* change EOL to EOI -- end of image */
lpOut[-1] = 1;
assert(lpOut == (lpOutStart + lpbiOut->biSizeImage));
return ICERR_OK;
}
LRESULT MSRLE32_CompressRLE8(const CodecInfo *pi, LPCBITMAPINFOHEADER lpbiIn,
const BYTE *lpIn, LPBITMAPINFOHEADER lpbiOut,
LPBYTE lpOut, BOOL isKey)
{
LPWORD lpC;
LONG lDist, lInLine, lLine;
LPBYTE lpOutStart = lpOut;
assert(pi != NULL && lpbiOut != NULL);
assert(lpIn != NULL && lpOut != NULL);
assert(pi->pCurFrame != NULL);
lpC = pi->pCurFrame;
lDist = QUALITY_to_DIST(pi->dwQuality);
lInLine = DIBWIDTHBYTES(*lpbiIn);
lLine = WIDTHBYTES(lpbiOut->biWidth * 16) / 2;
lpbiOut->biSizeImage = 0;
if (isKey) {
/* keyframe -- convert internal frame to output format */
INT x, y;
for (y = 0; y < lpbiOut->biHeight; y++) {
x = 0;
do {
x = MSRLE32_CompressRLE8Line(pi, NULL, lpC, lpbiIn, lpIn, lDist, x,
&lpOut, &lpbiOut->biSizeImage);
assert(lpOut == (lpOutStart + lpbiOut->biSizeImage));
} while (x < lpbiOut->biWidth);
lpC += lLine;
lpIn += lInLine;
/* add EOL -- end of line */
lpbiOut->biSizeImage += 2;
*((LPWORD)lpOut) = 0;
lpOut += sizeof(WORD);
assert(lpOut == (lpOutStart + lpbiOut->biSizeImage));
}
} else {
/* delta-frame -- compute delta between last and this internal frame */
LPWORD lpP;
INT x, y;
INT jumpx, jumpy;
assert(pi->pPrevFrame != NULL);
lpP = pi->pPrevFrame;
jumpx = -1;
jumpy = 0;
for (y = 0; y < lpbiOut->biHeight; y++) {
x = 0;
do {
INT count, pos;
if (jumpx == -1)
jumpx = x;
for (count = 0, pos = x; pos < lpbiOut->biWidth; pos++, count++) {
if (ColorCmp(lpP[pos], lpC[pos]) > lDist)
break;
}
if (pos == lpbiOut->biWidth && count > 4) {
/* (count > 4) secures that we will save space */
jumpy++;
break;
} else if (jumpy || jumpx != pos) {
/* time to jump */
assert(jumpx != -1);
if (pos < jumpx) {
/* can only jump in positive direction -- do an EOL then jump */
assert(jumpy > 0);
jumpx = 0;
jumpy--;
/* add EOL -- end of line */
lpbiOut->biSizeImage += 2;
*((LPWORD)lpOut) = 0;
lpOut += sizeof(WORD);
assert(lpOut == (lpOutStart + lpbiOut->biSizeImage));
}
/* FIXME: if (jumpy == 0 && could encode all) then jump too expensive */
/* write out real jump(s) */
while (jumpy || pos != jumpx) {
lpbiOut->biSizeImage += 4;
*lpOut++ = 0;
*lpOut++ = 2;
*lpOut = min(pos - jumpx, 255);
jumpx += *lpOut++;
*lpOut = min(jumpy, 255);
jumpy -= *lpOut++;
}
x = pos;
jumpy = 0;
}
jumpx = -1;
if (x < lpbiOut->biWidth) {
/* skip the 'same' things corresponding to previous frame */
x = MSRLE32_CompressRLE8Line(pi, lpP, lpC, lpbiIn, lpIn, lDist, x,
&lpOut, &lpbiOut->biSizeImage);
assert(lpOut == (lpOutStart + lpbiOut->biSizeImage));
}
} while (x < lpbiOut->biWidth);
lpP += lLine;
lpC += lLine;
lpIn += lInLine;
if (jumpy == 0) {
/* add EOL -- end of line */
lpbiOut->biSizeImage += 2;
*((LPWORD)lpOut) = 0;
lpOut += sizeof(WORD);
assert(lpOut == (lpOutStart + lpbiOut->biSizeImage));
}
}
/* add EOL -- will be changed to EOI */
lpbiOut->biSizeImage += 2;
*((LPWORD)lpOut) = 0;
lpOut += sizeof(WORD);
}
/* change EOL to EOI -- end of image */
lpOut[-1] = 1;
assert(lpOut == (lpOutStart + lpbiOut->biSizeImage));
return ICERR_OK;
}
/*****************************************************************************/
static LRESULT MSRLE32_DecompressRLE4(const CodecInfo *pi, LPCBITMAPINFOHEADER lpbi,
const BYTE *lpIn, LPBYTE lpOut)
{
int bytes_per_pixel;
int line_size;
int pixel_ptr = 0;
int i;
BOOL bEndFlag = FALSE;
assert(pi != NULL);
assert(lpbi != NULL && lpbi->biCompression == BI_RGB);
assert(lpIn != NULL && lpOut != NULL);
bytes_per_pixel = (lpbi->biBitCount + 1) / 8;
line_size = DIBWIDTHBYTES(*lpbi);
do {
BYTE code0, code1;
code0 = *lpIn++;
code1 = *lpIn++;
if (code0 == 0) {
int extra_byte;
switch (code1) {
case 0: /* EOL - end of line */
pixel_ptr = 0;
lpOut += line_size;
break;
case 1: /* EOI - end of image */
bEndFlag = TRUE;
break;
case 2: /* skip */
pixel_ptr += *lpIn++ * bytes_per_pixel;
lpOut += *lpIn++ * line_size;
if (pixel_ptr >= lpbi->biWidth * bytes_per_pixel) {
pixel_ptr = 0;
lpOut += line_size;
}
break;
default: /* absolute mode */
extra_byte = (((code1 + 1) & (~1)) / 2) & 0x01;
if (pixel_ptr/bytes_per_pixel + code1 > lpbi->biWidth)
return ICERR_ERROR;
code0 = code1;
for (i = 0; i < code0 / 2; i++) {
if (bytes_per_pixel == 1) {
code1 = lpIn[i];
lpOut[pixel_ptr++] = pi->palette_map[(code1 >> 4)];
if (2 * i + 1 <= code0)
lpOut[pixel_ptr++] = pi->palette_map[(code1 & 0x0F)];
} else if (bytes_per_pixel == 2) {
code1 = lpIn[i] >> 4;
lpOut[pixel_ptr++] = pi->palette_map[code1 * 2 + 0];
lpOut[pixel_ptr++] = pi->palette_map[code1 * 2 + 1];
if (2 * i + 1 <= code0) {
code1 = lpIn[i] & 0x0F;
lpOut[pixel_ptr++] = pi->palette_map[code1 * 2 + 0];
lpOut[pixel_ptr++] = pi->palette_map[code1 * 2 + 1];
}
} else {
code1 = lpIn[i] >> 4;
lpOut[pixel_ptr + 0] = pi->palette_map[code1 * 4 + 0];
lpOut[pixel_ptr + 1] = pi->palette_map[code1 * 4 + 1];
lpOut[pixel_ptr + 2] = pi->palette_map[code1 * 4 + 2];
pixel_ptr += bytes_per_pixel;
if (2 * i + 1 <= code0) {
code1 = lpIn[i] & 0x0F;
lpOut[pixel_ptr + 0] = pi->palette_map[code1 * 4 + 0];
lpOut[pixel_ptr + 1] = pi->palette_map[code1 * 4 + 1];
lpOut[pixel_ptr + 2] = pi->palette_map[code1 * 4 + 2];
pixel_ptr += bytes_per_pixel;
}
}
}
if (code0 & 0x01) {
if (bytes_per_pixel == 1) {
code1 = lpIn[i];
lpOut[pixel_ptr++] = pi->palette_map[(code1 >> 4)];
} else if (bytes_per_pixel == 2) {
code1 = lpIn[i] >> 4;
lpOut[pixel_ptr++] = pi->palette_map[code1 * 2 + 0];
lpOut[pixel_ptr++] = pi->palette_map[code1 * 2 + 1];
} else {
code1 = lpIn[i] >> 4;
lpOut[pixel_ptr + 0] = pi->palette_map[code1 * 4 + 0];
lpOut[pixel_ptr + 1] = pi->palette_map[code1 * 4 + 1];
lpOut[pixel_ptr + 2] = pi->palette_map[code1 * 4 + 2];
pixel_ptr += bytes_per_pixel;
}
lpIn++;
}
lpIn += code0 / 2;
/* if the RLE code is odd, skip a byte in the stream */
if (extra_byte)
lpIn++;
};
} else {
/* coded mode */
if (pixel_ptr/bytes_per_pixel + code0 > lpbi->biWidth)
return ICERR_ERROR;
if (bytes_per_pixel == 1) {
BYTE c1 = pi->palette_map[(code1 >> 4)];
BYTE c2 = pi->palette_map[(code1 & 0x0F)];
for (i = 0; i < code0; i++) {
if ((i & 1) == 0)
lpOut[pixel_ptr++] = c1;
else
lpOut[pixel_ptr++] = c2;
}
} else if (bytes_per_pixel == 2) {
BYTE hi1 = pi->palette_map[(code1 >> 4) * 2 + 0];
BYTE lo1 = pi->palette_map[(code1 >> 4) * 2 + 1];
BYTE hi2 = pi->palette_map[(code1 & 0x0F) * 2 + 0];
BYTE lo2 = pi->palette_map[(code1 & 0x0F) * 2 + 1];
for (i = 0; i < code0; i++) {
if ((i & 1) == 0) {
lpOut[pixel_ptr++] = hi1;
lpOut[pixel_ptr++] = lo1;
} else {
lpOut[pixel_ptr++] = hi2;
lpOut[pixel_ptr++] = lo2;
}
}
} else {
BYTE b1 = pi->palette_map[(code1 >> 4) * 4 + 0];
BYTE g1 = pi->palette_map[(code1 >> 4) * 4 + 1];
BYTE r1 = pi->palette_map[(code1 >> 4) * 4 + 2];
BYTE b2 = pi->palette_map[(code1 & 0x0F) * 4 + 0];
BYTE g2 = pi->palette_map[(code1 & 0x0F) * 4 + 1];
BYTE r2 = pi->palette_map[(code1 & 0x0F) * 4 + 2];
for (i = 0; i < code0; i++) {
if ((i & 1) == 0) {
lpOut[pixel_ptr + 0] = b1;
lpOut[pixel_ptr + 1] = g1;
lpOut[pixel_ptr + 2] = r1;
} else {
lpOut[pixel_ptr + 0] = b2;
lpOut[pixel_ptr + 1] = g2;
lpOut[pixel_ptr + 2] = r2;
}
pixel_ptr += bytes_per_pixel;
}
}
}
} while (! bEndFlag);
return ICERR_OK;
}
static LRESULT MSRLE32_DecompressRLE8(const CodecInfo *pi, LPCBITMAPINFOHEADER lpbi,
const BYTE *lpIn, LPBYTE lpOut)
{
int bytes_per_pixel;
int line_size;
int pixel_ptr = 0;
BOOL bEndFlag = FALSE;
assert(pi != NULL);
assert(lpbi != NULL && lpbi->biCompression == BI_RGB);
assert(lpIn != NULL && lpOut != NULL);
bytes_per_pixel = (lpbi->biBitCount + 1) / 8;
line_size = DIBWIDTHBYTES(*lpbi);
do {
BYTE code0, code1;
code0 = *lpIn++;
code1 = *lpIn++;
if (code0 == 0) {
int extra_byte;
switch (code1) {
case 0: /* EOL - end of line */
pixel_ptr = 0;
lpOut += line_size;
break;
case 1: /* EOI - end of image */
bEndFlag = TRUE;
break;
case 2: /* skip */
pixel_ptr += *lpIn++ * bytes_per_pixel;
lpOut += *lpIn++ * line_size;
if (pixel_ptr >= lpbi->biWidth * bytes_per_pixel) {
pixel_ptr = 0;
lpOut += line_size;
}
break;
default: /* absolute mode */
if (pixel_ptr/bytes_per_pixel + code1 > lpbi->biWidth) {
WARN("aborted absolute: (%d=%d/%d+%d) > %d\n",pixel_ptr/bytes_per_pixel + code1,pixel_ptr,bytes_per_pixel,code1,lpbi->biWidth);
return ICERR_ERROR;
}
extra_byte = code1 & 0x01;
code0 = code1;
while (code0--) {
code1 = *lpIn++;
if (bytes_per_pixel == 1) {
lpOut[pixel_ptr] = pi->palette_map[code1];
} else if (bytes_per_pixel == 2) {
lpOut[pixel_ptr + 0] = pi->palette_map[code1 * 2 + 0];
lpOut[pixel_ptr + 1] = pi->palette_map[code1 * 2 + 1];
} else {
lpOut[pixel_ptr + 0] = pi->palette_map[code1 * 4 + 0];
lpOut[pixel_ptr + 1] = pi->palette_map[code1 * 4 + 1];
lpOut[pixel_ptr + 2] = pi->palette_map[code1 * 4 + 2];
}
pixel_ptr += bytes_per_pixel;
}
/* if the RLE code is odd, skip a byte in the stream */
if (extra_byte)
lpIn++;
};
} else {
/* coded mode */
if (pixel_ptr/bytes_per_pixel + code0 > lpbi->biWidth) {
WARN("aborted coded: (%d=%d/%d+%d) > %d\n",pixel_ptr/bytes_per_pixel + code1,pixel_ptr,bytes_per_pixel,code1,lpbi->biWidth);
return ICERR_ERROR;
}
if (bytes_per_pixel == 1) {
code1 = pi->palette_map[code1];
while (code0--)
lpOut[pixel_ptr++] = code1;
} else if (bytes_per_pixel == 2) {
BYTE hi = pi->palette_map[code1 * 2 + 0];
BYTE lo = pi->palette_map[code1 * 2 + 1];
while (code0--) {
lpOut[pixel_ptr + 0] = hi;
lpOut[pixel_ptr + 1] = lo;
pixel_ptr += bytes_per_pixel;
}
} else {
BYTE r = pi->palette_map[code1 * 4 + 2];
BYTE g = pi->palette_map[code1 * 4 + 1];
BYTE b = pi->palette_map[code1 * 4 + 0];
while (code0--) {
lpOut[pixel_ptr + 0] = b;
lpOut[pixel_ptr + 1] = g;
lpOut[pixel_ptr + 2] = r;
pixel_ptr += bytes_per_pixel;
}
}
}
} while (! bEndFlag);
return ICERR_OK;
}
/*****************************************************************************/
static CodecInfo* Open(LPICOPEN icinfo)
{
CodecInfo* pi = NULL;
if (icinfo == NULL) {
TRACE("(NULL)\n");
return (LPVOID)0xFFFF0000;
}
if (icinfo->fccType != ICTYPE_VIDEO) return NULL;
TRACE("(%p = {%u,0x%08X(%4.4s),0x%08X(%4.4s),0x%X,0x%X,...})\n", icinfo,
icinfo->dwSize, icinfo->fccType, (char*)&icinfo->fccType,
icinfo->fccHandler, (char*)&icinfo->fccHandler,
icinfo->dwVersion,icinfo->dwFlags);
switch (icinfo->fccHandler) {
case FOURCC_RLE:
case FOURCC_RLE4:
case FOURCC_RLE8:
case FOURCC_MRLE:
break;
case mmioFOURCC('m','r','l','e'):
icinfo->fccHandler = FOURCC_MRLE;
break;
default:
WARN("unknown FOURCC = 0x%08X(%4.4s) !\n",
icinfo->fccHandler,(char*)&icinfo->fccHandler);
return NULL;
}
pi = (CodecInfo*)LocalAlloc(LPTR, sizeof(CodecInfo));
if (pi != NULL) {
pi->fccHandler = icinfo->fccHandler;
pi->bCompress = FALSE;
pi->dwQuality = MSRLE32_DEFAULTQUALITY;
pi->nPrevFrame = -1;
pi->pPrevFrame = pi->pCurFrame = NULL;
pi->bDecompress = FALSE;
pi->palette_map = NULL;
}
icinfo->dwError = (pi != NULL ? ICERR_OK : ICERR_MEMORY);
return pi;
}
static LRESULT Close(CodecInfo *pi)
{
TRACE("(%p)\n", pi);
/* pre-condition */
assert(pi != NULL);
if (pi->pPrevFrame != NULL || pi->pCurFrame != NULL)
CompressEnd(pi);
LocalFree((HLOCAL)pi);
return 1;
}
static LRESULT GetInfo(const CodecInfo *pi, ICINFO *icinfo, DWORD dwSize)
{
/* pre-condition */
assert(pi != NULL);
/* check parameters */
if (icinfo == NULL)
return sizeof(ICINFO);
if (dwSize < sizeof(ICINFO))
return 0;
icinfo->dwSize = sizeof(ICINFO);
icinfo->fccType = ICTYPE_VIDEO;
icinfo->fccHandler = (pi != NULL ? pi->fccHandler : FOURCC_MRLE);
icinfo->dwFlags = VIDCF_QUALITY | VIDCF_TEMPORAL | VIDCF_CRUNCH | VIDCF_FASTTEMPORALC;
icinfo->dwVersion = ICVERSION;
icinfo->dwVersionICM = ICVERSION;
LoadStringW(MSRLE32_hModule, IDS_NAME, icinfo->szName, sizeof(icinfo->szName)/sizeof(WCHAR));
LoadStringW(MSRLE32_hModule, IDS_DESCRIPTION, icinfo->szDescription, sizeof(icinfo->szDescription)/sizeof(WCHAR));
return sizeof(ICINFO);
}
static LRESULT SetQuality(CodecInfo *pi, LONG lQuality)
{
/* pre-condition */
assert(pi != NULL);
if (lQuality == -1)
lQuality = MSRLE32_DEFAULTQUALITY;
else if (ICQUALITY_LOW > lQuality || lQuality > ICQUALITY_HIGH)
return ICERR_BADPARAM;
pi->dwQuality = (DWORD)lQuality;
return ICERR_OK;
}
static LRESULT Configure(const CodecInfo *pi, HWND hWnd)
{
/* pre-condition */
assert(pi != NULL);
/* FIXME */
return ICERR_OK;
}
static LRESULT About(CodecInfo *pi, HWND hWnd)
{
WCHAR szTitle[20];
WCHAR szAbout[128];
/* pre-condition */
assert(MSRLE32_hModule != 0);
LoadStringW(MSRLE32_hModule, IDS_NAME, szTitle, sizeof(szTitle));
LoadStringW(MSRLE32_hModule, IDS_ABOUT, szAbout, sizeof(szAbout));
MessageBoxW(hWnd, szAbout, szTitle, MB_OK|MB_ICONINFORMATION);
return ICERR_OK;
}
static LRESULT CompressGetFormat(CodecInfo *pi, LPCBITMAPINFOHEADER lpbiIn,
LPBITMAPINFOHEADER lpbiOut)
{
LRESULT size;
TRACE("(%p,%p,%p)\n",pi,lpbiIn,lpbiOut);
/* pre-condition */
assert(pi != NULL);
/* check parameters -- need at least input format */
if (lpbiIn == NULL) {
if (lpbiOut != NULL)
return ICERR_BADPARAM;
return 0;
}
/* handle unsupported input format */
if (CompressQuery(pi, lpbiIn, NULL) != ICERR_OK)
return (lpbiOut == NULL ? ICERR_BADFORMAT : 0);
assert(0 < lpbiIn->biBitCount && lpbiIn->biBitCount <= 8);
switch (pi->fccHandler) {
case FOURCC_RLE4:
size = 1 << 4;
break;
case FOURCC_RLE8:
size = 1 << 8;
break;
case FOURCC_RLE:
case FOURCC_MRLE:
size = (lpbiIn->biBitCount <= 4 ? 1 << 4 : 1 << 8);
break;
default:
return ICERR_ERROR;
}
if (lpbiIn->biClrUsed != 0)
size = lpbiIn->biClrUsed;
size = sizeof(BITMAPINFOHEADER) + size * sizeof(RGBQUAD);
if (lpbiOut != NULL) {
lpbiOut->biSize = sizeof(BITMAPINFOHEADER);
lpbiOut->biWidth = lpbiIn->biWidth;
lpbiOut->biHeight = lpbiIn->biHeight;
lpbiOut->biPlanes = 1;
if (pi->fccHandler == FOURCC_RLE4 ||
lpbiIn->biBitCount <= 4) {
lpbiOut->biCompression = BI_RLE4;
lpbiOut->biBitCount = 4;
} else {
lpbiOut->biCompression = BI_RLE8;
lpbiOut->biBitCount = 8;
}
lpbiOut->biSizeImage = MSRLE32_GetMaxCompressedSize(lpbiOut);
lpbiOut->biXPelsPerMeter = lpbiIn->biXPelsPerMeter;
lpbiOut->biYPelsPerMeter = lpbiIn->biYPelsPerMeter;
if (lpbiIn->biClrUsed == 0)
size = 1<<lpbiIn->biBitCount;
else
size = lpbiIn->biClrUsed;
lpbiOut->biClrUsed = min(size, 1 << lpbiOut->biBitCount);
lpbiOut->biClrImportant = 0;
memcpy((LPBYTE)lpbiOut + lpbiOut->biSize,
(const BYTE*)lpbiIn + lpbiIn->biSize, lpbiOut->biClrUsed * sizeof(RGBQUAD));
return ICERR_OK;
} else
return size;
}
static LRESULT CompressGetSize(CodecInfo *pi, LPCBITMAPINFOHEADER lpbiIn,
LPCBITMAPINFOHEADER lpbiOut)
{
/* pre-condition */
assert(pi != NULL);
TRACE("(%p,%p,%p)\n",pi,lpbiIn,lpbiOut);
/* check parameter -- need at least one format */
if (lpbiIn == NULL && lpbiOut == NULL)
return 0;
/* check if the given format is supported */
if (CompressQuery(pi, lpbiIn, lpbiOut) != ICERR_OK)
return 0;
/* the worst case is coding the complete image in absolute mode. */
if (lpbiIn)
return MSRLE32_GetMaxCompressedSize(lpbiIn);
else
return MSRLE32_GetMaxCompressedSize(lpbiOut);
}
static LRESULT CompressQuery(const CodecInfo *pi, LPCBITMAPINFOHEADER lpbiIn,
LPCBITMAPINFOHEADER lpbiOut)
{
/* pre-condition */
assert(pi != NULL);
/* need at least one format */
if (lpbiIn == NULL && lpbiOut == NULL)
return ICERR_BADPARAM;
/* check input format if given */
if (lpbiIn != NULL) {
if (!isSupportedDIB(lpbiIn))
return ICERR_BADFORMAT;
/* for 4-bit need an even width */
if (lpbiIn->biBitCount <= 4 && (lpbiIn->biWidth % 2))
return ICERR_BADFORMAT;
if (pi->fccHandler == FOURCC_RLE4 && lpbiIn->biBitCount > 4)
return ICERR_UNSUPPORTED;
else if (lpbiIn->biBitCount > 8)
return ICERR_UNSUPPORTED;
}
/* check output format if given */
if (lpbiOut != NULL) {
if (!isSupportedMRLE(lpbiOut))
return ICERR_BADFORMAT;
if (lpbiIn != NULL) {
if (lpbiIn->biWidth != lpbiOut->biWidth)
return ICERR_UNSUPPORTED;
if (lpbiIn->biHeight != lpbiOut->biHeight)
return ICERR_UNSUPPORTED;
if (lpbiIn->biBitCount > lpbiOut->biBitCount)
return ICERR_UNSUPPORTED;
}
}
return ICERR_OK;
}
static LRESULT CompressBegin(CodecInfo *pi, LPCBITMAPINFOHEADER lpbiIn,
LPCBITMAPINFOHEADER lpbiOut)
{
const RGBQUAD *rgbIn;
const RGBQUAD *rgbOut;
UINT i;
size_t size;
TRACE("(%p,%p,%p)\n",pi,lpbiIn,lpbiOut);
/* pre-condition */
assert(pi != NULL);
/* check parameters -- need both formats */
if (lpbiIn == NULL || lpbiOut == NULL)
return ICERR_BADPARAM;
/* And both must be supported */
if (CompressQuery(pi, lpbiIn, lpbiOut) != ICERR_OK)
return ICERR_BADFORMAT;
/* FIXME: cannot compress and decompress at same time! */
if (pi->bDecompress) {
FIXME("cannot compress and decompress at same time!\n");
return ICERR_ERROR;
}
if (pi->bCompress)
CompressEnd(pi);
size = WIDTHBYTES(lpbiOut->biWidth * 16) / 2 * lpbiOut->biHeight;
pi->pPrevFrame = GlobalLock(GlobalAlloc(GPTR, size * sizeof(WORD)));
if (pi->pPrevFrame == NULL)
return ICERR_MEMORY;
pi->pCurFrame = GlobalLock(GlobalAlloc(GPTR, size * sizeof(WORD)));
if (pi->pCurFrame == NULL) {
CompressEnd(pi);
return ICERR_MEMORY;
}
pi->nPrevFrame = -1;
pi->bCompress = TRUE;
rgbIn = (const RGBQUAD*)((const BYTE*)lpbiIn + lpbiIn->biSize);
rgbOut = (const RGBQUAD*)((const BYTE*)lpbiOut + lpbiOut->biSize);
switch (lpbiOut->biBitCount) {
case 4:
case 8:
pi->palette_map = (LPBYTE)LocalAlloc(LPTR, lpbiIn->biClrUsed);
if (pi->palette_map == NULL) {
CompressEnd(pi);
return ICERR_MEMORY;
}
for (i = 0; i < lpbiIn->biClrUsed; i++) {
pi->palette_map[i] = MSRLE32_GetNearestPaletteIndex(lpbiOut->biClrUsed, rgbOut, rgbIn[i]);
}
break;
};
return ICERR_OK;
}
static LRESULT Compress(CodecInfo *pi, ICCOMPRESS* lpic, DWORD dwSize)
{
int i;
TRACE("(%p,%p,%u)\n",pi,lpic,dwSize);
/* pre-condition */
assert(pi != NULL);
/* check parameters */
if (lpic == NULL || dwSize < sizeof(ICCOMPRESS))
return ICERR_BADPARAM;
if (!lpic->lpbiOutput || !lpic->lpOutput ||
!lpic->lpbiInput || !lpic->lpInput)
return ICERR_BADPARAM;
TRACE("lpic={0x%X,%p,%p,%p,%p,%p,%p,%d,%u,%u,%p,%p}\n",lpic->dwFlags,lpic->lpbiOutput,lpic->lpOutput,lpic->lpbiInput,lpic->lpInput,lpic->lpckid,lpic->lpdwFlags,lpic->lFrameNum,lpic->dwFrameSize,lpic->dwQuality,lpic->lpbiPrev,lpic->lpPrev);
if (! pi->bCompress) {
LRESULT hr = CompressBegin(pi, lpic->lpbiInput, lpic->lpbiOutput);
if (hr != ICERR_OK)
return hr;
} else if (CompressQuery(pi, lpic->lpbiInput, lpic->lpbiOutput) != ICERR_OK)
return ICERR_BADFORMAT;
if (lpic->lFrameNum >= pi->nPrevFrame + 1) {
/* we continue in the sequence so we need to initialize
* our internal framedata */
computeInternalFrame(pi, lpic->lpbiInput, lpic->lpInput);
} else if (lpic->lFrameNum == pi->nPrevFrame) {
/* Oops, compress same frame again ? Okay, as you wish.
* No need to recompute internal framedata, because we only swapped buffers */
LPWORD pTmp = pi->pPrevFrame;
pi->pPrevFrame = pi->pCurFrame;
pi->pCurFrame = pTmp;
} else if ((lpic->dwFlags & ICCOMPRESS_KEYFRAME) == 0) {
LPWORD pTmp;
WARN(": prev=%d cur=%d gone back? -- untested\n",pi->nPrevFrame,lpic->lFrameNum);
if (lpic->lpbiPrev == NULL || lpic->lpPrev == NULL)
return ICERR_GOTOKEYFRAME; /* Need a keyframe if you go back */
if (CompressQuery(pi, lpic->lpbiPrev, lpic->lpbiOutput) != ICERR_OK)
return ICERR_BADFORMAT;
WARN(": prev=%d cur=%d compute swapped -- untested\n",pi->nPrevFrame,lpic->lFrameNum);
computeInternalFrame(pi, lpic->lpbiPrev, lpic->lpPrev);
/* swap buffers for current and previous frame */
/* Don't free and alloc new -- costs to much time and they are of equal size ! */
pTmp = pi->pPrevFrame;
pi->pPrevFrame = pi->pCurFrame;
pi->pCurFrame = pTmp;
pi->nPrevFrame = lpic->lFrameNum;
}
for (i = 0; i < 3; i++) {
SetQuality(pi, lpic->dwQuality);
lpic->lpbiOutput->biSizeImage = 0;
if (lpic->lpbiOutput->biBitCount == 4)
MSRLE32_CompressRLE4(pi, lpic->lpbiInput, (LPBYTE)lpic->lpInput,
lpic->lpbiOutput, (LPBYTE)lpic->lpOutput, (lpic->dwFlags & ICCOMPRESS_KEYFRAME) != 0);
else
MSRLE32_CompressRLE8(pi, lpic->lpbiInput, (LPBYTE)lpic->lpInput,
lpic->lpbiOutput, (LPBYTE)lpic->lpOutput, (lpic->dwFlags & ICCOMPRESS_KEYFRAME) != 0);
if (lpic->dwFrameSize == 0 ||
lpic->lpbiOutput->biSizeImage < lpic->dwFrameSize)
break;
if ((*lpic->lpdwFlags & ICCOMPRESS_KEYFRAME) == 0) {
if (lpic->lpbiOutput->biBitCount == 4)
MSRLE32_CompressRLE4(pi, lpic->lpbiInput, (LPBYTE)lpic->lpInput,
lpic->lpbiOutput, (LPBYTE)lpic->lpOutput, TRUE);
else
MSRLE32_CompressRLE8(pi, lpic->lpbiInput, (LPBYTE)lpic->lpInput,
lpic->lpbiOutput, (LPBYTE)lpic->lpOutput, TRUE);
if (lpic->dwFrameSize == 0 ||
lpic->lpbiOutput->biSizeImage < lpic->dwFrameSize) {
WARN("switched to keyframe, was small enough!\n");
*lpic->lpdwFlags |= ICCOMPRESS_KEYFRAME;
*lpic->lpckid = MAKEAVICKID(cktypeDIBbits,
StreamFromFOURCC(*lpic->lpckid));
break;
}
}
if (lpic->dwQuality < 1000)
break;
lpic->dwQuality -= 1000; /* reduce quality by 10% */
}
{ /* swap buffer for current and previous frame */
/* Don't free and alloc new -- costs to much time and they are of equal size ! */
register LPWORD pTmp = pi->pPrevFrame;
pi->pPrevFrame = pi->pCurFrame;
pi->pCurFrame = pTmp;
pi->nPrevFrame = lpic->lFrameNum;
}
return ICERR_OK;
}
static LRESULT CompressEnd(CodecInfo *pi)
{
TRACE("(%p)\n",pi);
if (pi != NULL) {
if (pi->pPrevFrame != NULL)
{
GlobalUnlock(GlobalHandle(pi->pPrevFrame));
GlobalFree(GlobalHandle(pi->pPrevFrame));
}
if (pi->pCurFrame != NULL)
{
GlobalUnlock(GlobalHandle(pi->pCurFrame));
GlobalFree(GlobalHandle(pi->pCurFrame));
}
pi->pPrevFrame = NULL;
pi->pCurFrame = NULL;
pi->nPrevFrame = -1;
pi->bCompress = FALSE;
}
return ICERR_OK;
}
static LRESULT DecompressGetFormat(CodecInfo *pi, LPCBITMAPINFOHEADER lpbiIn,
LPBITMAPINFOHEADER lpbiOut)
{
DWORD size;
TRACE("(%p,%p,%p)\n",pi,lpbiIn,lpbiOut);
/* pre-condition */
assert(pi != NULL);
if (lpbiIn == NULL)
return (lpbiOut != NULL ? ICERR_BADPARAM : 0);
if (DecompressQuery(pi, lpbiIn, NULL) != ICERR_OK)
return (lpbiOut != NULL ? ICERR_BADFORMAT : 0);
size = lpbiIn->biSize;
if (lpbiIn->biBitCount <= 8)
size += lpbiIn->biClrUsed * sizeof(RGBQUAD);
if (lpbiOut != NULL) {
memcpy(lpbiOut, lpbiIn, size);
lpbiOut->biCompression = BI_RGB;
lpbiOut->biSizeImage = DIBWIDTHBYTES(*lpbiOut) * lpbiOut->biHeight;
return ICERR_OK;
} else
return size;
}
static LRESULT DecompressQuery(CodecInfo *pi, LPCBITMAPINFOHEADER lpbiIn,
LPCBITMAPINFOHEADER lpbiOut)
{
LRESULT hr = ICERR_OK;
TRACE("(%p,%p,%p)\n",pi,lpbiIn,lpbiOut);
/* pre-condition */
assert(pi != NULL);
/* need at least one format */
if (lpbiIn == NULL && lpbiOut == NULL)
return ICERR_BADPARAM;
/* check input format if given */
if (lpbiIn != NULL) {
if (!isSupportedMRLE(lpbiIn))
return ICERR_BADFORMAT;
}
/* check output format if given */
if (lpbiOut != NULL) {
if (!isSupportedDIB(lpbiOut))
hr = ICERR_BADFORMAT;
if (lpbiIn != NULL) {
if (lpbiIn->biWidth != lpbiOut->biWidth)
hr = ICERR_UNSUPPORTED;
if (lpbiIn->biHeight != lpbiOut->biHeight)
hr = ICERR_UNSUPPORTED;
if (lpbiIn->biBitCount > lpbiOut->biBitCount)
hr = ICERR_UNSUPPORTED;
}
}
return hr;
}
static LRESULT DecompressBegin(CodecInfo *pi, LPCBITMAPINFOHEADER lpbiIn,
LPCBITMAPINFOHEADER lpbiOut)
{
const RGBQUAD *rgbIn;
const RGBQUAD *rgbOut;
UINT i;
TRACE("(%p,%p,%p)\n",pi,lpbiIn,lpbiOut);
/* pre-condition */
assert(pi != NULL);
/* check parameters */
if (lpbiIn == NULL || lpbiOut == NULL)
return ICERR_BADPARAM;
if (DecompressQuery(pi, lpbiIn, lpbiOut) != ICERR_OK)
return ICERR_BADFORMAT;
/* FIXME: cannot compress and decompress at a time! */
if (pi->bCompress) {
FIXME("cannot compress and decompress at same time!\n");
return ICERR_ERROR;
}
if (pi->bDecompress)
DecompressEnd(pi);
rgbIn = (const RGBQUAD*)((const BYTE*)lpbiIn + lpbiIn->biSize);
rgbOut = (const RGBQUAD*)((const BYTE*)lpbiOut + lpbiOut->biSize);
switch (lpbiOut->biBitCount) {
case 4:
case 8:
pi->palette_map = (LPBYTE)LocalAlloc(LPTR, lpbiIn->biClrUsed);
if (pi->palette_map == NULL)
return ICERR_MEMORY;
for (i = 0; i < lpbiIn->biClrUsed; i++) {
pi->palette_map[i] = MSRLE32_GetNearestPaletteIndex(lpbiOut->biClrUsed, rgbOut, rgbIn[i]);
}
break;
case 15:
case 16:
pi->palette_map = (LPBYTE)LocalAlloc(LPTR, lpbiIn->biClrUsed * 2);
if (pi->palette_map == NULL)
return ICERR_MEMORY;
for (i = 0; i < lpbiIn->biClrUsed; i++) {
WORD color;
if (lpbiOut->biBitCount == 15)
color = ((rgbIn[i].rgbRed >> 3) << 10)
| ((rgbIn[i].rgbGreen >> 3) << 5) | (rgbIn[i].rgbBlue >> 3);
else
color = ((rgbIn[i].rgbRed >> 3) << 11)
| ((rgbIn[i].rgbGreen >> 3) << 5) | (rgbIn[i].rgbBlue >> 3);
pi->palette_map[i * 2 + 1] = color >> 8;
pi->palette_map[i * 2 + 0] = color & 0xFF;
};
break;
case 24:
case 32:
pi->palette_map = (LPBYTE)LocalAlloc(LPTR, lpbiIn->biClrUsed * sizeof(RGBQUAD));
if (pi->palette_map == NULL)
return ICERR_MEMORY;
memcpy(pi->palette_map, rgbIn, lpbiIn->biClrUsed * sizeof(RGBQUAD));
break;
};
pi->bDecompress = TRUE;
return ICERR_OK;
}
static LRESULT Decompress(CodecInfo *pi, ICDECOMPRESS *pic, DWORD dwSize)
{
TRACE("(%p,%p,%u)\n",pi,pic,dwSize);
/* pre-condition */
assert(pi != NULL);
/* check parameters */
if (pic == NULL)
return ICERR_BADPARAM;
if (pic->lpbiInput == NULL || pic->lpInput == NULL ||
pic->lpbiOutput == NULL || pic->lpOutput == NULL)
return ICERR_BADPARAM;
/* check formats */
if (! pi->bDecompress) {
LRESULT hr = DecompressBegin(pi, pic->lpbiInput, pic->lpbiOutput);
if (hr != ICERR_OK)
return hr;
} else if (DecompressQuery(pi, pic->lpbiInput, pic->lpbiOutput) != ICERR_OK)
return ICERR_BADFORMAT;
assert(pic->lpbiInput->biWidth == pic->lpbiOutput->biWidth);
assert(pic->lpbiInput->biHeight == pic->lpbiOutput->biHeight);
pic->lpbiOutput->biSizeImage = DIBWIDTHBYTES(*pic->lpbiOutput) * pic->lpbiOutput->biHeight;
if (pic->lpbiInput->biBitCount == 4)
return MSRLE32_DecompressRLE4(pi, pic->lpbiOutput, pic->lpInput, pic->lpOutput);
else
return MSRLE32_DecompressRLE8(pi, pic->lpbiOutput, pic->lpInput, pic->lpOutput);
}
static LRESULT DecompressEnd(CodecInfo *pi)
{
TRACE("(%p)\n",pi);
/* pre-condition */
assert(pi != NULL);
pi->bDecompress = FALSE;
if (pi->palette_map != NULL) {
LocalFree((HLOCAL)pi->palette_map);
pi->palette_map = NULL;
}
return ICERR_OK;
}
static LRESULT DecompressGetPalette(CodecInfo *pi, LPCBITMAPINFOHEADER lpbiIn,
LPBITMAPINFOHEADER lpbiOut)
{
int size;
TRACE("(%p,%p,%p)\n",pi,lpbiIn,lpbiOut);
/* pre-condition */
assert(pi != NULL);
/* check parameters */
if (lpbiIn == NULL || lpbiOut == NULL)
return ICERR_BADPARAM;
if (DecompressQuery(pi, lpbiIn, lpbiOut) != ICERR_OK)
return ICERR_BADFORMAT;
if (lpbiOut->biBitCount > 8)
return ICERR_ERROR;
if (lpbiIn->biBitCount <= 8) {
if (lpbiIn->biClrUsed > 0)
size = lpbiIn->biClrUsed;
else
size = (1 << lpbiIn->biBitCount);
lpbiOut->biClrUsed = size;
memcpy((LPBYTE)lpbiOut + lpbiOut->biSize, (const BYTE*)lpbiIn + lpbiIn->biSize, size * sizeof(RGBQUAD));
} /* else could never occur ! */
return ICERR_OK;
}
/* DriverProc - entry point for an installable driver */
LRESULT CALLBACK MSRLE32_DriverProc(DWORD_PTR dwDrvID, HDRVR hDrv, UINT uMsg,
LPARAM lParam1, LPARAM lParam2)
{
CodecInfo *pi = (CodecInfo*)dwDrvID;
TRACE("(%lx,%p,0x%04X,0x%08lX,0x%08lX)\n", dwDrvID, hDrv, uMsg, lParam1, lParam2);
switch (uMsg) {
/* standard driver messages */
case DRV_LOAD:
return DRVCNF_OK;
case DRV_OPEN:
return (LRESULT)Open((ICOPEN*)lParam2);
case DRV_CLOSE:
if (dwDrvID != 0xFFFF0000 && (LPVOID)dwDrvID != NULL)
Close(pi);
return DRVCNF_OK;
case DRV_ENABLE:
case DRV_DISABLE:
return DRVCNF_OK;
case DRV_FREE:
return DRVCNF_OK;
case DRV_QUERYCONFIGURE:
return DRVCNF_CANCEL; /* FIXME */
case DRV_CONFIGURE:
return DRVCNF_OK; /* FIXME */
case DRV_INSTALL:
case DRV_REMOVE:
return DRVCNF_OK;
/* installable compression manager messages */
case ICM_CONFIGURE:
FIXME("ICM_CONFIGURE (%ld)\n",lParam1);
if (lParam1 == -1)
return ICERR_UNSUPPORTED; /* FIXME */
else
return Configure(pi, (HWND)lParam1);
case ICM_ABOUT:
if (lParam1 == -1)
return ICERR_OK;
else
return About(pi, (HWND)lParam1);
case ICM_GETSTATE:
case ICM_SETSTATE:
return 0; /* no state */
case ICM_GETINFO:
return GetInfo(pi, (ICINFO*)lParam1, (DWORD)lParam2);
case ICM_GETDEFAULTQUALITY:
if ((LPVOID)lParam1 != NULL) {
*((LPDWORD)lParam1) = MSRLE32_DEFAULTQUALITY;
return ICERR_OK;
}
break;
case ICM_GETQUALITY:
if ((LPVOID)lParam1 != NULL) {
*((LPDWORD)lParam1) = pi->dwQuality;
return ICERR_OK;
}
break;
case ICM_SETQUALITY:
return SetQuality(pi, *(LPLONG)lParam1);
case ICM_COMPRESS_GET_FORMAT:
return CompressGetFormat(pi, (LPCBITMAPINFOHEADER)lParam1,
(LPBITMAPINFOHEADER)lParam2);
case ICM_COMPRESS_GET_SIZE:
return CompressGetSize(pi, (LPCBITMAPINFOHEADER)lParam1,
(LPCBITMAPINFOHEADER)lParam2);
case ICM_COMPRESS_QUERY:
return CompressQuery(pi, (LPCBITMAPINFOHEADER)lParam1,
(LPCBITMAPINFOHEADER)lParam2);
case ICM_COMPRESS_BEGIN:
return CompressBegin(pi, (LPCBITMAPINFOHEADER)lParam1,
(LPCBITMAPINFOHEADER)lParam2);
case ICM_COMPRESS:
return Compress(pi, (ICCOMPRESS*)lParam1, (DWORD)lParam2);
case ICM_COMPRESS_END:
return CompressEnd(pi);
case ICM_DECOMPRESS_GET_FORMAT:
return DecompressGetFormat(pi, (LPCBITMAPINFOHEADER)lParam1,
(LPBITMAPINFOHEADER)lParam2);
case ICM_DECOMPRESS_QUERY:
return DecompressQuery(pi, (LPCBITMAPINFOHEADER)lParam1,
(LPCBITMAPINFOHEADER)lParam2);
case ICM_DECOMPRESS_BEGIN:
return DecompressBegin(pi, (LPCBITMAPINFOHEADER)lParam1,
(LPCBITMAPINFOHEADER)lParam2);
case ICM_DECOMPRESS:
return Decompress(pi, (ICDECOMPRESS*)lParam1, (DWORD)lParam2);
case ICM_DECOMPRESS_END:
return DecompressEnd(pi);
case ICM_DECOMPRESS_SET_PALETTE:
FIXME("(...) -> SetPalette(%p,%p,%p): stub!\n", pi, (LPVOID)lParam1, (LPVOID)lParam2);
return ICERR_UNSUPPORTED;
case ICM_DECOMPRESS_GET_PALETTE:
return DecompressGetPalette(pi, (LPBITMAPINFOHEADER)lParam1,
(LPBITMAPINFOHEADER)lParam2);
case ICM_GETDEFAULTKEYFRAMERATE:
if ((LPVOID)lParam1 != NULL)
*(LPDWORD)lParam1 = 15;
return ICERR_OK;
default:
if (uMsg < DRV_USER)
return DefDriverProc(dwDrvID, hDrv, uMsg, lParam1, lParam2);
else
FIXME("Unknown message uMsg=0x%08X lParam1=0x%08lX lParam2=0x%08lX\n",uMsg,lParam1,lParam2);
};
return ICERR_UNSUPPORTED;
}
/* DllMain - library initialization code */
BOOL WINAPI DllMain(HINSTANCE hModule, DWORD dwReason, LPVOID lpReserved)
{
TRACE("(%p,%d,%p)\n",(LPVOID)hModule,dwReason,lpReserved);
switch (dwReason) {
case DLL_PROCESS_ATTACH:
DisableThreadLibraryCalls(hModule);
MSRLE32_hModule = hModule;
break;
case DLL_PROCESS_DETACH:
break;
}
return TRUE;
}
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