I420转RGB24 麻烦看下代码，谢谢 急
#define uint8_t unsigned char#define int8_t signed char#define uint16_t unsigned short#define int16_t signed short#define uint32_t unsigned int#define int32_t signed int#define RGB_Y_OUT 1.164#define B_U_OUT 2.018#define Y_ADD_OUT 16#define G_U_OUT 0.391#define G_V_OUT 0.813#define U_ADD_OUT 128#define R_V_OUT 1.596#define V_ADD_OUT 128#define SCALEBITS_OUT 13#define FIX_OUT(x) ((uint16_t) ((x) * (1L<<SCALEBITS_OUT) + 0.5))int32_t RGB_Y_tab[256];int32_t B_U_tab[256];int32_t G_U_tab[256];int32_t G_V_tab[256];int32_t R_V_tab[256];#define MAX(a,b) ((a) > (b) ? (a) : (b))#define MIN(a,b) ((a) > (b) ? (b) : (a))void colorspace_init(void) { int32_t i; for(i = 0; i < 256; i++) { RGB_Y_tab[i] = FIX_OUT(RGB_Y_OUT) * (i - Y_ADD_OUT); B_U_tab[i] = FIX_OUT(B_U_OUT) * (i - U_ADD_OUT); G_U_tab[i] = FIX_OUT(G_U_OUT) * (i - U_ADD_OUT); G_V_tab[i] = FIX_OUT(G_V_OUT) * (i - V_ADD_OUT); R_V_tab[i] = FIX_OUT(R_V_OUT) * (i - V_ADD_OUT); }}unsigned char str_tmp[2000*3];void yv12_to_rgb24_c(uint8_t *dst, int dst_stride, uint8_t *y_src, uint8_t *u_src, uint8_t * v_src, int y_stride, int uv_stride, int width, int height){ static int iFlag = 0; if (iFlag == 0) { colorspace_init(); iFlag = 1; } unsigned char* pDest = dst; const uint32_t dst_dif = 6 * dst_stride - 3 * width; int32_t y_dif = 2 * y_stride - width; uint8_t *dst2 = dst + 3 * dst_stride; const uint8_t *y_src2 = y_src + y_stride; uint32_t x, y; if (height < 0) { // flip image? height = -height; y_src += (height - 1) * y_stride; y_src2 = y_src - y_stride; u_src += (height / 2 - 1) * uv_stride; v_src += (height / 2 - 1) * uv_stride; y_dif = -width - 2 * y_stride; uv_stride = -uv_stride; } for (y = height / 2; y; y--) { // process one 2x2 block per iteration for (x = 0; x < (uint32_t)width / 2; x++) { int u, v; int b_u, g_uv, r_v, rgb_y; int r, g, b; u = u_src[x]; v = v_src[x]; b_u = B_U_tab[u]; g_uv = G_U_tab[u] + G_V_tab[v]; r_v = R_V_tab[v]; rgb_y = RGB_Y_tab[*y_src]; b = (rgb_y + b_u) >> SCALEBITS_OUT; g = (rgb_y - g_uv) >> SCALEBITS_OUT; r = (rgb_y + r_v) >> SCALEBITS_OUT; dst[0] = MAX(0,MIN(255, b)); dst[1] = MAX(0,MIN(255, g)); dst[2] = MAX(0,MIN(255, r)); y_src++; rgb_y = RGB_Y_tab[*y_src]; b = (rgb_y + b_u) >> SCALEBITS_OUT; g = (rgb_y - g_uv) >> SCALEBITS_OUT; r = (rgb_y + r_v) >> SCALEBITS_OUT; dst[3] = MAX(0,MIN(255, b)); dst[4] = MAX(0,MIN(255, g)); dst[5] = MAX(0,MIN(255, r)); y_src++; rgb_y = RGB_Y_tab[*y_src2]; b = (rgb_y + b_u) >> SCALEBITS_OUT; g = (rgb_y - g_uv) >> SCALEBITS_OUT; r = (rgb_y + r_v) >> SCALEBITS_OUT; dst2[0] = MAX(0,MIN(255, b)); dst2[1] = MAX(0,MIN(255, g)); dst2[2] = MAX(0,MIN(255, r)); y_src2++; rgb_y = RGB_Y_tab[*y_src2]; b = (rgb_y + b_u) >> SCALEBITS_OUT; g = (rgb_y - g_uv) >> SCALEBITS_OUT; r = (rgb_y + r_v) >> SCALEBITS_OUT; dst2[3] = MAX(0,MIN(255, b)); dst2[4] = MAX(0,MIN(255, g)); dst2[5] = MAX(0,MIN(255, r)); y_src2++; dst += 6; dst2 += 6; } dst += dst_dif; dst2 += dst_dif; y_src += y_dif; y_src2 += y_dif; u_src += uv_stride; v_src += uv_stride; } for (int i = 0; i < height/2; i++) { memcpy(str_tmp, pDest + i*width*3, width*3); memcpy(pDest+i*width*3, pDest+(height-i-1)*width*3, width*3); memcpy(pDest+(height-1-i)*width*3, str_tmp, width*3); }}void yv12_rgb24(unsigned char* pBmpBuf,unsigned char* pDataBuf, long nWidth, long nHeight){ unsigned char *YBuf, *UBuf, *VBuf ; //?æ·ÅY¡¢U¡¢VÖµµÄ»º³åÇø YBuf = pDataBuf ; UBuf = pDataBuf + nWidth * nHeight ; VBuf = pDataBuf + nWidth * nHeight * 5 / 4 ; yv12_to_rgb24_c(pBmpBuf , nWidth , YBuf , UBuf , VBuf, nWidth , nWidth/2, nWidth YBuf/