FFMPEG 内部 YUV444p16LE-> P016LE

y 方向直接复制

1. hscale

2. vscale

static void yuv2p016cX_c(SwsContext *c, const int16_t *chrFilter, int chrFilterSize,
                         const int16_t **chrUSrc, const int16_t **chrVSrc,
                         uint8_t *dest8, int chrDstW)
{
    uint16_t *dest = (uint16_t*)dest8;
    const int32_t **uSrc = (const int32_t **)chrUSrc;
    const int32_t **vSrc = (const int32_t **)chrVSrc;
    int shift = 15;
    int big_endian = c->dstFormat == AV_PIX_FMT_P016BE;
    int i, j;

    for (i = 0; i < chrDstW; i++) {
        int u = 1 << (shift - 1);
        int v = 1 << (shift - 1);

        /* See yuv2planeX_16_c_template for details. */
        u -= 0x40000000;
        v -= 0x40000000;
        for (j = 0; j < chrFilterSize; j++) {
            u += uSrc[j][i] * (unsigned)chrFilter[j];
            v += vSrc[j][i] * (unsigned)chrFilter[j];
        }

        output_pixel(&dest[2*i]  , u, 0x8000, int);
        output_pixel(&dest[2*i+1], v, 0x8000, int);
    }
}

FFMPEG YUV444P16LE -> P010 过程

yuv2plane1:0x4ba510 <ff_yuv2plane1_16_avx>      y

yuv2planeX:0x4b9af0 <ff_yuv2planeX_16_sse4>          

yuv2nv12cX:0x47f820 <yuv2p016cX_c>　　　      y     chrFilter =  {2048, 1786, 492, -172, -58, 0, 0, 0}  int32_t  in = 187709 ... ... 

hyScale:0x4c7200 <ff_hscale16to19_4_sse4>       y      

hcScale:0x4c7290 <ff_hscale16to19_8_sse4>       y     

yuv2plane1 = 0x480860 <yuv2p010l1_LE_c>

yuv2planeX = 0x4a6580 <yuv2p010lX_LE_c>

yuv2nv12cX = 0x4806e0 <yuv2p010cX_c>

hyScale = 0x4c5520 <ff_hscale16to15_4_ssse3>

hcScale = 0x4c55a0 <ff_hscale16to15_8_ssse3>