yv12_to_rgb

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#define CLIP(value) (uchar)(((value)>0xFF)?0xff:(((value)<0)?0:(value)))int yv12_to_rgb(uchar *yv12, uchar *rgb, uint width,uint height){    uchar *py;    uchar *pu;    uchar *pv;//此部分注释见另一篇yuyv_to_yv12    uint linesize = width * 3;    uint uvlinesize = width / 2;    uint offset=0;    uint offset1=0;    uint offsety=0;    uint offsety1=0;    uint offsetuv=0;    py = yv12;    pv = py+(width*height);    pu = pv+((width*height)/4);    uint h=0;    uint w=0;    uint wy=0;    uint huv=0;    uint wuv=0;    for(h=0;h<height;h+=2)    {        wy=0;        wuv=0;        offset = h * linesize;        offset1 = (h + 1) * linesize;        offsety = h * width;        offsety1 = (h + 1) * width;        offsetuv = huv * uvlinesize;        for(w=0;w<linesize;w+=6)        {            /* standart: r = y0 + 1.402 (v-128) */            /* logitech: r = y0 + 1.370705 (v-128) */            rgb[w + offset] = CLIP(py[wy + offsety] + 1.402 * (pv[wuv + offsetuv]-128));            /* standart: g = y0 - 0.34414 (u-128) - 0.71414 (v-128)*/            /* logitech: g = y0 - 0.337633 (u-128)- 0.698001 (v-128)*/            rgb[(w + 1) + offset] = CLIP(py[wy + offsety] - 0.34414 * (pu[wuv + offsetuv]-128) -0.71414*(pv[wuv + offsetuv]-128));            /* standart: b = y0 + 1.772 (u-128) */            /* logitech: b = y0 + 1.732446 (u-128) */            rgb[(w + 2) + offset] = CLIP(py[wy + offsety] + 1.772 *(pu[wuv + offsetuv]-128));            rgb[(w + 3) + offset] = CLIP(py[wy + 1 + offsety] + 1.402 * (pv[wuv + offsetuv]-128));            rgb[(w + 4) + offset] = CLIP(py[wy +1  + offsety] - 0.34414 * (pu[wuv + offsetuv]-128) -0.71414*(pv[wuv + offsetuv]-128));            rgb[(w + 5) + offset] = CLIP(py[wy + 1 + offsety] + 1.772 *(pu[wuv + offsetuv]-128));            rgb[w + offset1] = CLIP(py[wy + offsety1] + 1.402 * (pv[wuv + offsetuv]-128));            rgb[(w + 1) + offset1] = CLIP(py[wy + offsety1] - 0.34414 * (pu[wuv + offsetuv]-128) -0.71414*(pv[wuv + offsetuv]-128));            rgb[(w + 2) + offset1] = CLIP(py[wy + offsety1] + 1.772 *(pu[wuv + offsetuv]-128));            rgb[(w + 3) + offset1] = CLIP(py[wy + 1 + offsety1] + 1.402 * (pv[wuv + offsetuv]-128));            rgb[(w + 4) + offset1] = CLIP(py[wy + 1 + offsety1] - 0.34414 * (pu[wuv + offsetuv]-128) -0.71414*(pv[wuv + offsetuv]-128));            rgb[(w + 5) + offset1] = CLIP(py[wy + 1 + offsety1] + 1.772 *(pu[wuv + offsetuv]-128));            wuv++;            wy+=2;        }        huv++;    }    return 0;}