YUV格式学习：NV16和YUV422P格式互换

来源：互联网发布：linux 查看几个cpu 编辑：程序博客网时间：2024/05/16 06:10

其实以前也实现过SP转P的格式，现在再完善一些，写成此文。由于是相同采样空间的转换，只是个别分量位置的调整，只要明白了Y、U、V分量的布置，就很容易写出来。

代码如下：

/**yyyy yyyyuv    uv->yyyy yyyyuuvv*/void yuv422sp_to_yuv422p(unsigned char* yuv422sp, unsigned char* yuv422p, int width, int height){    int i, j;    int y_size;    int uv_size;    unsigned char* p_y1;    unsigned char* p_uv;    unsigned char* p_y2;    unsigned char* p_u;    unsigned char* p_v;    y_size = uv_size = width * height;    p_y1 = yuv422sp;    p_uv = yuv422sp + y_size;    p_y2 = yuv422p;    p_u  = yuv422p + y_size;    p_v  = p_u + width * height / 2;    memcpy(p_y2, p_y1, y_size);    for (j = 0, i = 0; j < uv_size; j+=2, i++)    {        p_u[i] = p_uv[j];        p_v[i] = p_uv[j+1];    }}/**yyyy yyyyuuvv->yyyy yyyyuv    uv*/void yuv422p_to_yuv422sp(unsigned char* yuv422p, unsigned char* yuv422sp, int width, int height){    int i, j;    int y_size;    int uv_size;    unsigned char* p_y1;    unsigned char* p_uv;    unsigned char* p_y2;    unsigned char* p_u;    unsigned char* p_v;    y_size = uv_size = width * height;    p_y1 = yuv422p;    p_y2 = yuv422sp;    p_u  = p_y1 + y_size;    p_v  = p_u + width * height / 2;    p_uv = p_y2 + y_size;    memcpy(p_y2, p_y1, y_size);    for (j = 0, i = 0; j < uv_size; j+=2, i++)    {// 此处可调整U、V的位置，变成NV16或NV61#if 01        p_uv[j] = p_u[i];        p_uv[j+1] = p_v[i];#else        p_uv[j] = p_v[i];        p_uv[j+1] = p_u[i];#endif    }}

李迟 2015.8.5 晚上

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