#include <stdio.h>#include <Windows.h>// --------------------------------------------------------------#define RGB2YCbCr(R, G, B, Y, Cb, Cr) \ Y = ( 1868*B + 9617*G + 4899*R ) >> 14; \ Cb = ( 8192*B - 5428*G - 2758*R + 2097152 ) >> 14; \ Cr = ( -1332*B - 6860*G + 8192*R + 2097152 ) >> 14; \void RGBConvertToYCbCr(int R, int G, int B, int& Y, int& Cr, int& Cb){ RGB2YCbCr(R, G, B, Y, Cb, Cr);}// --------------------------------------------------------------#define RANGE_INT(iVal, iMin, iMax) ( ( ( iVal ) > ( iMin ) ) ? ( ( ( iVal ) <= ( iMax ) ) ? ( iVal ) : ( iMax ) ) : ( iMin ) )#define ROUND_SHR_POSITIVE(Dividend, iShiftRightCount) ( ( ( Dividend ) & ( 1 << ( ( iShiftRightCount ) - 1 ) ) ) ? ( ( Dividend ) >> ( iShiftRightCount ) ) + 1 : ( ( Dividend ) >> ( iShiftRightCount ) ) )#define ROUND_SHR_NEGATIVE(Dividend, iShiftRightCount) ( -( ( ( -( Dividend ) ) & ( 1 << ( ( iShiftRightCount ) - 1 ) ) ) ? ( ( -( Dividend ) ) >> ( iShiftRightCount ) ) + 1 : ( ( -( Dividend ) ) >> ( iShiftRightCount ) ) ) )#define ROUND_SHR(Dividend, iShiftRightCount) ( ( ( Dividend ) >= 0 ) ? ROUND_SHR_POSITIVE( Dividend, iShiftRightCount ) : ROUND_SHR_NEGATIVE( Dividend, iShiftRightCount ) )void YCbCrConvertToRGB(int Y, int Cr, int Cb, int& R, int& G, int& B){ int iTmpR = 0; int iTmpG = 0; int iTmpB = 0; iTmpR = (((int)Y) << 14) + 22970*(((int)Cr) - 128); iTmpG = (((int)Y) << 14) - 5638*(((int)Cb) - 128) - 11700*(((int)Cr) - 128); iTmpB = (((int)Y) << 14) + 29032*(((int)Cb) - 128); iTmpR = ROUND_SHR(iTmpR, 14); iTmpG = ROUND_SHR(iTmpG, 14); iTmpB = ROUND_SHR(iTmpB, 14); R = (int)RANGE_INT(iTmpR, 0, 255); G = (int)RANGE_INT(iTmpG, 0, 255); B = (int)RANGE_INT(iTmpB, 0, 255);}// --------------------------------------------------------------int main(void){ int iTestR = 30; int iTestG = 60; int iTestB = 90; int iTestY = 0; int iTestCb = 0; int iTestCr = 0; RGBConvertToYCbCr(iTestR, iTestG, iTestB, iTestY, iTestCb, iTestCr); printf("1.(%d,%d,%d)->(%d,%d,%d)\r\n\r\n", iTestR, iTestG, iTestB, iTestY, iTestCb, iTestCr); YCbCrConvertToRGB(iTestY, iTestCb, iTestCr,iTestR, iTestG, iTestB); printf("2.(%d,%d,%d)->(%d,%d,%d)\r\n\r\n", iTestY, iTestCb, iTestCr, iTestR, iTestG, iTestB); getchar(); return 0;}
