YUVTORGB.CPP - ISEE Image Browser JPEG Color Conversion Implementation File
Copyright (c) Vchelp-Copathway-Isee Workgroup 2000 All Member's
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Author: analyst
file version:
Build 00523
Date 2000-5-23
*********************************************************** ****************** /
Static Int CR1_402 [256], CB0_34414 [256], CR0_71414 [256], CB1_772 [256]
init ()
{
/// ..........
For (i = 0; i <256; i )
{
CR1_402 [I] = (int) (1.402 * (SIGNED Char) i 1);
CB0_34414 [I] = (int) (- 0.34414 * (Signed Char) i 1);
CR0_71414 [I] = (int) (- 0.71414 * (Signed char) i 1);
CB1_772 [I] = (int) (1.772 * (signed char) i 1);
}
/// ..........
}
DWORD YUV_RGB32 (Int Y, Int R, Int G, INT B)
{
Y = 128; R = Y;
B = Y; g = y;
IF (r <0) r = 0; if (g <0) g = 0; IF (b <0) b = 0;
IF (r> 255) r = 255; if (g> 255) g = 255; if (b> 255) b = 255;
Return R << 16 & Brvbarg << 8 & Brvbarb;
}
Void YcBCR411_RGB32 (DWORD * BMPPIXEL, INT PITCH)
{
INT I, J, CB, CR, M;
INT R, G, B;
Signed char * crbuf = (signed char *) JPEG_CRBUF;
Signed char * CBBUF = (SIGNED Char *) JPEG_CBBBUF;
Signed char * YBUF = (SIGNED Char *) JPEG_YBUF;
For (m = 0; M <4; M , bMppixel - = (m & 1) * pitch * 2-8 16 * (m == 2))
For (i = 0; i <8; i = 2) {
For (j = 0; j <8; j = 2) {
CB = CBBUF [(I / 2 4 * (m / 2)) * 8 J / 2 4 * (M & 1)]; Cr = CRBUF [(I / 2 4 * (m / 2)) * 8 J / 2 4 * (M & 1)];
R = CR1_402 [(Byte) Cr];
G = CB0_34414 [(Byte) CB] CR0_71414W [(Byte) Cr];
B = CB1_772 [(Byte) CB];
* BMPPIXEL = YUV_RGB32 (YBUF [i * 8 J 128 * M], R, G, B), BMPPixel
* bmpixel = yuv_rgb32 (YBUF [i * 8 J 1 128 * m], r, g, b), bMPPixel
* (BMPPIXEL PITCH / 4-2) = yuv_rgb32 (YBUF [i * 8 J 8 128 * M], R, G, B);
* (BMPPIXEL PITCH / 4-1) = yuv_rgb32 (YBUF [i * 8 J 9 128 * M], R, G, B);
}
BMPPixel = (DWORD *) ((unsigned) BMPPixel Pitch * 2-32);
}
}
Void Ycbcr111_RGB32 (DWORD * BMPPIXEL, INT PITCH)
{
INT I, J, CB, CR;
INT R, G, B;
Signed char * crbuf = (signed char *) JPEG_CRBUF;
Signed char * CBBUF = (SIGNED Char *) JPEG_CBBBUF;
Signed char * YBUF = (SIGNED Char *) JPEG_YBUF;
For (i = 0; i <8; i ) {
For (j = 0; j <8; j ) {
CB = CBBUF [i * 8 j];
Cr = CRBUF [i * 8 j];
R = CR1_402 [(Byte) Cr];
G = CB0_34414 [(Byte) CB] CR0_71414W [(Byte) Cr];
B = CB1_772 [(Byte) CB];
* BMPPIXEL = YUV_RGB32 (YBUF [i * 8 J], R, G, B), BMPPixel
}
BMPPIXEL = (DWORD *) ((unsigned) BMPPixel PITCH-32);
}
}
/ * Gray mode * /
Void YYY_RGB32 (DWORD * BMPPIXEL, INT PITCH)
{
INT I, J;
Int Y;
Signed char * YBUF = (SIGNED Char *) JPEG_YBUF;
For (i = 0; i <8; i ) {
For (j = 0; j <8; j ) {
Y = YBUF [i * 8 j] 128;
* BMPPIXEL = Y << 16 & brvbary << 8 & brvbary;
bmpixel;
}
BMPPIXEL = (DWORD *) ((unsigned) BMPPixel PITCH-32);
}
}
