transferidct.c

< VC++视频音频开发>> 这本书的源码

#include "portab.h"

void transferIDCT_add(int16_t *sourceS16, uint8_t *destU8, int stride) {
	int x, y;

	stride -= 8;	
	for (y=0; y<8; y++) {
		for (x=0; x<8; x++) {
			#define SUM16 (*(destU8) + *(sourceS16))
			if      (SUM16 > 255) *(destU8) = 255;
			else if (SUM16 <   0) *(destU8) =   0;
			else                  *(destU8) = SUM16;
			sourceS16++;
			destU8++;
		}
		destU8 += stride;
	}
}

void transferIDCT_copy(int16_t *sourceS16, uint8_t *destU8, int stride) {
	int x, y;

	stride -= 8;	
	for (y=0; y<8; y++) {
		for (x=0; x<8; x++) {
			if      (*(sourceS16) > 255) *(destU8) = 255;
			else if (*(sourceS16) <   0) *(destU8) =   0;
			else                         *(destU8) = (unsigned char) *(sourceS16);
			sourceS16++;
			destU8++;
		}
		destU8 += stride;
	}
}