SDL  2.0
Macros | Functions
yuv_rgb_std_func.h File Reference
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Macros

#define PACK_PIXEL(rgb_ptr)
#define y_pixel_stride   1
#define uv_pixel_stride   1
#define uv_x_sample_interval   2
#define uv_y_sample_interval   2

Functions

void STD_FUNCTION_NAME (uint32_t width, uint32_t height, const uint8_t *Y, const uint8_t *U, const uint8_t *V, uint32_t Y_stride, uint32_t UV_stride, uint8_t *RGB, uint32_t RGB_stride, YCbCrType yuv_type)

Macro Definition Documentation

#define PACK_PIXEL (   rgb_ptr)
Value:
*(Uint16 *)rgb_ptr = \
((((Uint16)clampU8(y_tmp+r_tmp)) << 8 ) & 0xF800) | \
((((Uint16)clampU8(y_tmp+g_tmp)) << 3) & 0x07E0) | \
(((Uint16)clampU8(y_tmp+b_tmp)) >> 3); \
rgb_ptr += 2; \

Definition at line 12 of file yuv_rgb_std_func.h.

Referenced by STD_FUNCTION_NAME().

#define uv_pixel_stride   1

Referenced by SSE_FUNCTION_NAME(), and STD_FUNCTION_NAME().

#define uv_x_sample_interval   2

Referenced by SSE_FUNCTION_NAME(), and STD_FUNCTION_NAME().

#define uv_y_sample_interval   2

Referenced by SSE_FUNCTION_NAME(), and STD_FUNCTION_NAME().

#define y_pixel_stride   1

Referenced by SSE_FUNCTION_NAME(), and STD_FUNCTION_NAME().

Function Documentation

void STD_FUNCTION_NAME ( uint32_t  width,
uint32_t  height,
const uint8_t *  Y,
const uint8_t *  U,
const uint8_t *  V,
uint32_t  Y_stride,
uint32_t  UV_stride,
uint8_t *  RGB,
uint32_t  RGB_stride,
YCbCrType  yuv_type 
)

Definition at line 72 of file yuv_rgb_std_func.h.

References PACK_PIXEL, YUV2RGBParam::u_b_factor, YUV2RGBParam::u_g_factor, uv_pixel_stride, uv_x_sample_interval, uv_y_sample_interval, YUV2RGBParam::v_g_factor, YUV2RGBParam::v_r_factor, YUV2RGBParam::y_factor, y_pixel_stride, YUV2RGBParam::y_shift, and YUV2RGB.

Referenced by SSE_FUNCTION_NAME().

{
const YUV2RGBParam *const param = &(YUV2RGB[yuv_type]);
#if YUV_FORMAT == YUV_FORMAT_420
#define y_pixel_stride 1
#define uv_pixel_stride 1
#define uv_x_sample_interval 2
#define uv_y_sample_interval 2
#elif YUV_FORMAT == YUV_FORMAT_422
#define y_pixel_stride 2
#define uv_pixel_stride 4
#define uv_x_sample_interval 2
#define uv_y_sample_interval 1
#elif YUV_FORMAT == YUV_FORMAT_NV12
#define y_pixel_stride 1
#define uv_pixel_stride 2
#define uv_x_sample_interval 2
#define uv_y_sample_interval 2
#endif
uint32_t x, y;
for(y=0; y<(height-(uv_y_sample_interval-1)); y+=uv_y_sample_interval)
{
const uint8_t *y_ptr1=Y+y*Y_stride,
*y_ptr2=Y+(y+1)*Y_stride,
*u_ptr=U+(y/uv_y_sample_interval)*UV_stride,
*v_ptr=V+(y/uv_y_sample_interval)*UV_stride;
uint8_t *rgb_ptr1=RGB+y*RGB_stride;
#if uv_y_sample_interval > 1
uint8_t *rgb_ptr2=RGB+(y+1)*RGB_stride;
#endif
for(x=0; x<(width-(uv_x_sample_interval-1)); x+=uv_x_sample_interval)
{
// Compute U and V contributions, common to the four pixels
int32_t u_tmp = ((*u_ptr)-128);
int32_t v_tmp = ((*v_ptr)-128);
int32_t r_tmp = (v_tmp*param->v_r_factor);
int32_t g_tmp = (u_tmp*param->u_g_factor + v_tmp*param->v_g_factor);
int32_t b_tmp = (u_tmp*param->u_b_factor);
// Compute the Y contribution for each pixel
int32_t y_tmp = ((y_ptr1[0]-param->y_shift)*param->y_factor);
PACK_PIXEL(rgb_ptr1);
y_tmp = ((y_ptr1[y_pixel_stride]-param->y_shift)*param->y_factor);
PACK_PIXEL(rgb_ptr1);
#if uv_y_sample_interval > 1
y_tmp = ((y_ptr2[0]-param->y_shift)*param->y_factor);
PACK_PIXEL(rgb_ptr2);
y_tmp = ((y_ptr2[y_pixel_stride]-param->y_shift)*param->y_factor);
PACK_PIXEL(rgb_ptr2);
#endif
y_ptr1+=2*y_pixel_stride;
y_ptr2+=2*y_pixel_stride;
u_ptr+=2*uv_pixel_stride/uv_x_sample_interval;
v_ptr+=2*uv_pixel_stride/uv_x_sample_interval;
}
/* Catch the last pixel, if needed */
if (uv_x_sample_interval == 2 && x == (width-1))
{
// Compute U and V contributions, common to the four pixels
int32_t u_tmp = ((*u_ptr)-128);
int32_t v_tmp = ((*v_ptr)-128);
int32_t r_tmp = (v_tmp*param->v_r_factor);
int32_t g_tmp = (u_tmp*param->u_g_factor + v_tmp*param->v_g_factor);
int32_t b_tmp = (u_tmp*param->u_b_factor);
// Compute the Y contribution for each pixel
int32_t y_tmp = ((y_ptr1[0]-param->y_shift)*param->y_factor);
PACK_PIXEL(rgb_ptr1);
#if uv_y_sample_interval > 1
y_tmp = ((y_ptr2[0]-param->y_shift)*param->y_factor);
PACK_PIXEL(rgb_ptr2);
#endif
}
}
/* Catch the last line, if needed */
if (uv_y_sample_interval == 2 && y == (height-1))
{
const uint8_t *y_ptr1=Y+y*Y_stride,
*u_ptr=U+(y/uv_y_sample_interval)*UV_stride,
*v_ptr=V+(y/uv_y_sample_interval)*UV_stride;
uint8_t *rgb_ptr1=RGB+y*RGB_stride;
for(x=0; x<(width-(uv_x_sample_interval-1)); x+=uv_x_sample_interval)
{
// Compute U and V contributions, common to the four pixels
int32_t u_tmp = ((*u_ptr)-128);
int32_t v_tmp = ((*v_ptr)-128);
int32_t r_tmp = (v_tmp*param->v_r_factor);
int32_t g_tmp = (u_tmp*param->u_g_factor + v_tmp*param->v_g_factor);
int32_t b_tmp = (u_tmp*param->u_b_factor);
// Compute the Y contribution for each pixel
int32_t y_tmp = ((y_ptr1[0]-param->y_shift)*param->y_factor);
PACK_PIXEL(rgb_ptr1);
y_tmp = ((y_ptr1[y_pixel_stride]-param->y_shift)*param->y_factor);
PACK_PIXEL(rgb_ptr1);
y_ptr1+=2*y_pixel_stride;
u_ptr+=2*uv_pixel_stride/uv_x_sample_interval;
v_ptr+=2*uv_pixel_stride/uv_x_sample_interval;
}
/* Catch the last pixel, if needed */
if (uv_x_sample_interval == 2 && x == (width-1))
{
// Compute U and V contributions, common to the four pixels
int32_t u_tmp = ((*u_ptr)-128);
int32_t v_tmp = ((*v_ptr)-128);
int32_t r_tmp = (v_tmp*param->v_r_factor);
int32_t g_tmp = (u_tmp*param->u_g_factor + v_tmp*param->v_g_factor);
int32_t b_tmp = (u_tmp*param->u_b_factor);
// Compute the Y contribution for each pixel
int32_t y_tmp = ((y_ptr1[0]-param->y_shift)*param->y_factor);
PACK_PIXEL(rgb_ptr1);
}
}
#undef y_pixel_stride
#undef uv_pixel_stride
#undef uv_x_sample_interval
#undef uv_y_sample_interval
}