SDL 2.0
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

◆ PACK_PIXEL

#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; \
uint16_t Uint16
Definition: SDL_stdinc.h:191
static uint8_t clampU8(int32_t v)
Definition: yuv_rgb.c:75

Definition at line 12 of file yuv_rgb_std_func.h.

◆ uv_pixel_stride

#define uv_pixel_stride   1

◆ uv_x_sample_interval

#define uv_x_sample_interval   2

◆ uv_y_sample_interval

#define uv_y_sample_interval   2

◆ y_pixel_stride

#define y_pixel_stride   1

Function Documentation

◆ STD_FUNCTION_NAME()

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.

77{
78 const YUV2RGBParam *const param = &(YUV2RGB[yuv_type]);
79#if YUV_FORMAT == YUV_FORMAT_420
80 #define y_pixel_stride 1
81 #define uv_pixel_stride 1
82 #define uv_x_sample_interval 2
83 #define uv_y_sample_interval 2
84#elif YUV_FORMAT == YUV_FORMAT_422
85 #define y_pixel_stride 2
86 #define uv_pixel_stride 4
87 #define uv_x_sample_interval 2
88 #define uv_y_sample_interval 1
89#elif YUV_FORMAT == YUV_FORMAT_NV12
90 #define y_pixel_stride 1
91 #define uv_pixel_stride 2
92 #define uv_x_sample_interval 2
93 #define uv_y_sample_interval 2
94#endif
95
96 uint32_t x, y;
98 {
99 const uint8_t *y_ptr1=Y+y*Y_stride,
100 *y_ptr2=Y+(y+1)*Y_stride,
101 *u_ptr=U+(y/uv_y_sample_interval)*UV_stride,
102 *v_ptr=V+(y/uv_y_sample_interval)*UV_stride;
103
104 uint8_t *rgb_ptr1=RGB+y*RGB_stride;
105
106 #if uv_y_sample_interval > 1
107 uint8_t *rgb_ptr2=RGB+(y+1)*RGB_stride;
108 #endif
109
111 {
112 // Compute U and V contributions, common to the four pixels
113
114 int32_t u_tmp = ((*u_ptr)-128);
115 int32_t v_tmp = ((*v_ptr)-128);
116
117 int32_t r_tmp = (v_tmp*param->v_r_factor);
118 int32_t g_tmp = (u_tmp*param->u_g_factor + v_tmp*param->v_g_factor);
119 int32_t b_tmp = (u_tmp*param->u_b_factor);
120
121 // Compute the Y contribution for each pixel
122
123 int32_t y_tmp = ((y_ptr1[0]-param->y_shift)*param->y_factor);
124 PACK_PIXEL(rgb_ptr1);
125
126 y_tmp = ((y_ptr1[y_pixel_stride]-param->y_shift)*param->y_factor);
127 PACK_PIXEL(rgb_ptr1);
128
129 #if uv_y_sample_interval > 1
130 y_tmp = ((y_ptr2[0]-param->y_shift)*param->y_factor);
131 PACK_PIXEL(rgb_ptr2);
132
133 y_tmp = ((y_ptr2[y_pixel_stride]-param->y_shift)*param->y_factor);
134 PACK_PIXEL(rgb_ptr2);
135 #endif
136
137 y_ptr1+=2*y_pixel_stride;
138 y_ptr2+=2*y_pixel_stride;
141 }
142
143 /* Catch the last pixel, if needed */
144 if (uv_x_sample_interval == 2 && x == (width-1))
145 {
146 // Compute U and V contributions, common to the four pixels
147
148 int32_t u_tmp = ((*u_ptr)-128);
149 int32_t v_tmp = ((*v_ptr)-128);
150
151 int32_t r_tmp = (v_tmp*param->v_r_factor);
152 int32_t g_tmp = (u_tmp*param->u_g_factor + v_tmp*param->v_g_factor);
153 int32_t b_tmp = (u_tmp*param->u_b_factor);
154
155 // Compute the Y contribution for each pixel
156
157 int32_t y_tmp = ((y_ptr1[0]-param->y_shift)*param->y_factor);
158 PACK_PIXEL(rgb_ptr1);
159
160 #if uv_y_sample_interval > 1
161 y_tmp = ((y_ptr2[0]-param->y_shift)*param->y_factor);
162 PACK_PIXEL(rgb_ptr2);
163 #endif
164 }
165 }
166
167 /* Catch the last line, if needed */
168 if (uv_y_sample_interval == 2 && y == (height-1))
169 {
170 const uint8_t *y_ptr1=Y+y*Y_stride,
171 *u_ptr=U+(y/uv_y_sample_interval)*UV_stride,
172 *v_ptr=V+(y/uv_y_sample_interval)*UV_stride;
173
174 uint8_t *rgb_ptr1=RGB+y*RGB_stride;
175
177 {
178 // Compute U and V contributions, common to the four pixels
179
180 int32_t u_tmp = ((*u_ptr)-128);
181 int32_t v_tmp = ((*v_ptr)-128);
182
183 int32_t r_tmp = (v_tmp*param->v_r_factor);
184 int32_t g_tmp = (u_tmp*param->u_g_factor + v_tmp*param->v_g_factor);
185 int32_t b_tmp = (u_tmp*param->u_b_factor);
186
187 // Compute the Y contribution for each pixel
188
189 int32_t y_tmp = ((y_ptr1[0]-param->y_shift)*param->y_factor);
190 PACK_PIXEL(rgb_ptr1);
191
192 y_tmp = ((y_ptr1[y_pixel_stride]-param->y_shift)*param->y_factor);
193 PACK_PIXEL(rgb_ptr1);
194
195 y_ptr1+=2*y_pixel_stride;
198 }
199
200 /* Catch the last pixel, if needed */
201 if (uv_x_sample_interval == 2 && x == (width-1))
202 {
203 // Compute U and V contributions, common to the four pixels
204
205 int32_t u_tmp = ((*u_ptr)-128);
206 int32_t v_tmp = ((*v_ptr)-128);
207
208 int32_t r_tmp = (v_tmp*param->v_r_factor);
209 int32_t g_tmp = (u_tmp*param->u_g_factor + v_tmp*param->v_g_factor);
210 int32_t b_tmp = (u_tmp*param->u_b_factor);
211
212 // Compute the Y contribution for each pixel
213
214 int32_t y_tmp = ((y_ptr1[0]-param->y_shift)*param->y_factor);
215 PACK_PIXEL(rgb_ptr1);
216 }
217 }
218
219 #undef y_pixel_stride
220 #undef uv_pixel_stride
221 #undef uv_x_sample_interval
222 #undef uv_y_sample_interval
223}
unsigned int uint32_t
signed int int32_t
unsigned char uint8_t
GLint GLint GLint GLint GLint GLint y
Definition: SDL_opengl.h:1574
GLint GLint GLsizei width
Definition: SDL_opengl.h:1572
GLint GLint GLint GLint GLint x
Definition: SDL_opengl.h:1574
GLint GLint GLsizei GLsizei height
Definition: SDL_opengl.h:1572
GLfloat param
@ RGB
Definition: edid.h:20
static const YUV2RGBParam YUV2RGB[3]
Definition: yuv_rgb.c:42
#define V(value)
Definition: yuv_rgb.c:35
#define PACK_PIXEL(rgb_ptr)
#define uv_x_sample_interval
#define y_pixel_stride
#define uv_pixel_stride
#define uv_y_sample_interval

References PACK_PIXEL, RGB, uv_pixel_stride, uv_x_sample_interval, uv_y_sample_interval, V, y_pixel_stride, and YUV2RGB.

Referenced by SSE_FUNCTION_NAME().