rgb色彩空间转换实现汇总

转载请注明http://blog.csdn.net/u011046042/article/details/71727885
做视频和图形这块进行总结
色彩空间转换的汇总
rgb到bgr的转换
代码如下：

static void convert_rgb_to_bgr(uint8_t* src, uint8_t* dest, int width)
{
    int x;

    for (x = 0; x < width; x++) {
        *dest++ = src[2];
        *dest++ = src[1];
        *dest++ = src[0];
        src += 3;
    }
}

rgb到bgrx的转换

static void convert_rgb_to_bgrx(uint8_t* src, uint8_t* dest, int width)
{
    int x;

    for (x = 0; x < width; x++) {
        *dest++ = src[2];
        *dest++ = src[1];
        *dest++ = src[0];
        *dest++ = 0;
        src += 3;
    }
}

RGB16 到RGB24

static void convert_RGB16_to_RGB24(void *line, int width, uint8_t **out_line)
{
    uint16_t *src_line = line;
    uint8_t *out_pix;
    int x;

    spice_assert(out_line && *out_line);

    out_pix = *out_line;

    for (x = 0; x < width; x++) {
       uint16_t pixel = *src_line++;
       *out_pix++ = ((pixel >> 7) & 0xf8) | ((pixel >> 12) & 0x7);
       *out_pix++ = ((pixel >> 2) & 0xf8) | ((pixel >> 7) & 0x7);
       *out_pix++ = ((pixel << 3) & 0xf8) | ((pixel >> 2) & 0x7);
   }
}

BGRX到RGB24

static void convert_BGRX32_to_RGB24(void *line, int width, uint8_t **out_line)
{
    uint32_t *src_line = line;
    uint8_t *out_pix;
    int x;

    spice_assert(out_line && *out_line);

    out_pix = *out_line;

    for (x = 0; x < width; x++) {
        uint32_t pixel = *src_line++;
        *out_pix++ = (pixel >> 16) & 0xff;
        *out_pix++ = (pixel >> 8) & 0xff;
        *out_pix++ = pixel & 0xff;
    }
}

yuyv到rgb的装换

#define clip_8bit(val) ((val) < 0 ? 0 : (val) > 255 ? 255 : (val))
compress_yuyv_to_rgb (const uint8_t *src_ptr,uint8_t *rgb_ptr,const int width, const int height)
{
    int r,g,b;
    int y,u,v;
    int i;
    int table_ub_value;
    int table_ug_value;
    int table_vg_value;
    int table_vr_value;

    for (i = 0; i < width * height / 2; ++i)
    {
      y = src_ptr[0];
      u = src_ptr[1];
      v = src_ptr[3];

      table_ub_value=table_ub[u];
      table_ug_value=table_ug[u];
      table_vg_value=table_vg[v];
      table_vr_value=table_vr[v];

      b = y + table_ub_value;
      g = y - table_ug_value - table_vg_value;
      r = y + table_vr_value;

      *rgb_ptr++ = clip_8bit (r);               /* R */
      *rgb_ptr++ = clip_8bit (g);               /* G */
      *rgb_ptr++ = clip_8bit (b);               /* B */
      y = src_ptr[2];

      b = y + table_ub_value;
      g = y - table_ug_value - table_vg_value;
      r = y + table_vr_value;

      *rgb_ptr++ = clip_8bit (r);               /* R */
      *rgb_ptr++ = clip_8bit (g);               /* G */
      *rgb_ptr++ = clip_8bit (b);               /* B */

       src_ptr += 4;
    }
}

转载请注明http://blog.csdn.net/u011046042/article/details/71727885
纯代码 C语言，纯干货。方便以后使用，持续更新。