source: trunk/src/testing/app/hd-video-player/YUV_RGB.h @ 4

/******************************************************************************
 * SAGE - Scalable Adaptive Graphics Environment
 *
 * Copyright (C) 2004 Electronic Visualization Laboratory,
 * University of Illinois at Chicago
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#ifndef _YUV_RGB_
#define _YUV_RGB_

#include <windows.h>
#include "stdafx.h"

// nominal luma range
#define MIN_LUMA                16
#define MAX_LUMA                235
#define LUMA_RANGE      (MAX_LUMA - MIN_LUMA + 1)        // Total number of valid luma values

#define clipRGB(x) clip((x), 0, 255)
#define clipYUV(x) clip((x), MIN_LUMA, MAX_LUMA)

typedef struct _UYVY {
        unsigned char u;
        unsigned char y0;
        unsigned char v;
        unsigned char y1;
}UYVY_ARRAY;

void SaveToBmp(char *Path, unsigned char *img_buff, int width, int height, int bitcount);

inline long clip(long i, long min, long max)
{
    if (i < min) return min;
    if (i > max) return max;
    return i;
}

// RGB2YUV: Convert an RGB pixel to YUV

inline BYTE RGB2Y(DWORD r, DWORD g, DWORD b)
{
    BYTE luma = static_cast<BYTE>(( (  66 * r + 129 * g +  25 * b + 128) >> 8) +  16);
    _ASSERTE(luma >= MIN_LUMA);
    _ASSERTE(luma <= MAX_LUMA);
    return luma;
}

inline BYTE RGB2U(DWORD r, DWORD g, DWORD b)
{
    return static_cast<BYTE>(( ( -38 * r -  74 * g + 112 * b + 128) >> 8) + 128);
}

inline BYTE RGB2V(DWORD r, DWORD g, DWORD b)
{
    return static_cast<BYTE>(( ( 112 * r -  94 * g -  18 * b + 128) >> 8) + 128);
}

// Convert YUV to RGB

inline BYTE YUV2Red(long y, long u, long v)
{
    return static_cast<BYTE>(clipRGB(( 298 * (y - 16) + 409 * (v - 128) + 128) >> 8));
}


inline BYTE YUV2Green(long y, long u, long v)
{
    return static_cast<BYTE>((clipRGB(( 298 * (y - 16) - 100 * (u - 128) - 208 * (v - 128) + 128) >> 8)));
}

inline BYTE YUV2Blue(long y, long u, long v)
{
    return static_cast<BYTE>((clipRGB(( 298 * (y - 16) + 516 * (u - 128) + 128) >> 8)));
}


#endif