diff options
Diffstat (limited to 'ThirdParty/SDL2/src/video/yuv2rgb/yuv_rgb_std_func.h')
| -rw-r--r-- | ThirdParty/SDL2/src/video/yuv2rgb/yuv_rgb_std_func.h | 220 |
1 files changed, 220 insertions, 0 deletions
diff --git a/ThirdParty/SDL2/src/video/yuv2rgb/yuv_rgb_std_func.h b/ThirdParty/SDL2/src/video/yuv2rgb/yuv_rgb_std_func.h new file mode 100644 index 0000000..bf4f48e --- /dev/null +++ b/ThirdParty/SDL2/src/video/yuv2rgb/yuv_rgb_std_func.h @@ -0,0 +1,220 @@ +// Copyright 2016 Adrien Descamps +// Distributed under BSD 3-Clause License + +/* You need to define the following macros before including this file: + STD_FUNCTION_NAME + YUV_FORMAT + RGB_FORMAT +*/ + +#if RGB_FORMAT == RGB_FORMAT_RGB565 + +#define PACK_PIXEL(rgb_ptr) \ + *(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; \ + +#elif RGB_FORMAT == RGB_FORMAT_RGB24 + +#define PACK_PIXEL(rgb_ptr) \ + rgb_ptr[0] = clampU8(y_tmp+r_tmp); \ + rgb_ptr[1] = clampU8(y_tmp+g_tmp); \ + rgb_ptr[2] = clampU8(y_tmp+b_tmp); \ + rgb_ptr += 3; \ + +#elif RGB_FORMAT == RGB_FORMAT_RGBA + +#define PACK_PIXEL(rgb_ptr) \ + *(Uint32 *)rgb_ptr = \ + (((Uint32)clampU8(y_tmp+r_tmp)) << 24) | \ + (((Uint32)clampU8(y_tmp+g_tmp)) << 16) | \ + (((Uint32)clampU8(y_tmp+b_tmp)) << 8) | \ + 0x000000FF; \ + rgb_ptr += 4; \ + +#elif RGB_FORMAT == RGB_FORMAT_BGRA + +#define PACK_PIXEL(rgb_ptr) \ + *(Uint32 *)rgb_ptr = \ + (((Uint32)clampU8(y_tmp+b_tmp)) << 24) | \ + (((Uint32)clampU8(y_tmp+g_tmp)) << 16) | \ + (((Uint32)clampU8(y_tmp+r_tmp)) << 8) | \ + 0x000000FF; \ + rgb_ptr += 4; \ + +#elif RGB_FORMAT == RGB_FORMAT_ARGB + +#define PACK_PIXEL(rgb_ptr) \ + *(Uint32 *)rgb_ptr = \ + 0xFF000000 | \ + (((Uint32)clampU8(y_tmp+r_tmp)) << 16) | \ + (((Uint32)clampU8(y_tmp+g_tmp)) << 8) | \ + (((Uint32)clampU8(y_tmp+b_tmp)) << 0); \ + rgb_ptr += 4; \ + +#elif RGB_FORMAT == RGB_FORMAT_ABGR + +#define PACK_PIXEL(rgb_ptr) \ + *(Uint32 *)rgb_ptr = \ + 0xFF000000 | \ + (((Uint32)clampU8(y_tmp+b_tmp)) << 16) | \ + (((Uint32)clampU8(y_tmp+g_tmp)) << 8) | \ + (((Uint32)clampU8(y_tmp+r_tmp)) << 0); \ + rgb_ptr += 4; \ + +#else +#error PACK_PIXEL unimplemented +#endif + + +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) +{ + const YUV2RGBParam *const param = &(YUV2RGB[yuv_type]); +#if YUV_FORMAT == YUV_FORMAT_420 + const int y_pixel_stride = 1; + const int uv_pixel_stride = 1; + const int uv_x_sample_interval = 2; + const int uv_y_sample_interval = 2; +#elif YUV_FORMAT == YUV_FORMAT_422 + const int y_pixel_stride = 2; + const int uv_pixel_stride = 4; + const int uv_x_sample_interval = 2; + const int uv_y_sample_interval = 1; +#elif YUV_FORMAT == YUV_FORMAT_NV12 + const int y_pixel_stride = 1; + const int uv_pixel_stride = 2; + const int uv_x_sample_interval = 2; + const int 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, + *rgb_ptr2=RGB+(y+1)*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); + + 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); + } + + 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); + } + } + } + + /* 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 STD_FUNCTION_NAME +#undef YUV_FORMAT +#undef RGB_FORMAT +#undef PACK_PIXEL |