67 static void YCrCB_to_YUV420P_1x1(struct jdec_private *priv, int sx, int sy)  in YCrCB_to_YUV420P_1x1()  argument
73   p = priv->plane[0];  in YCrCB_to_YUV420P_1x1()
74   y = priv->Y;  in YCrCB_to_YUV420P_1x1()
78      p += priv->bytes_per_row[0];  in YCrCB_to_YUV420P_1x1()
82   p = priv->plane[1];  in YCrCB_to_YUV420P_1x1()
83   s = priv->Cb;  in YCrCB_to_YUV420P_1x1()
91      p += priv->bytes_per_row[1] - 4;  in YCrCB_to_YUV420P_1x1()
94   p = priv->plane[2];  in YCrCB_to_YUV420P_1x1()
95   s = priv->Cr;  in YCrCB_to_YUV420P_1x1()
103      p += priv->bytes_per_row[2] - 4;  in YCrCB_to_YUV420P_1x1()
113 static void YCrCB_to_YUV420P_2x1(struct jdec_private *priv, int sx, int sy)  in YCrCB_to_YUV420P_2x1()  argument
119   p = priv->plane[0];  in YCrCB_to_YUV420P_2x1()
120   y1 = priv->Y;  in YCrCB_to_YUV420P_2x1()
124      p += priv->bytes_per_row[0];  in YCrCB_to_YUV420P_2x1()
130   p = priv->plane[1];  in YCrCB_to_YUV420P_2x1()
131   s = priv->Cb;  in YCrCB_to_YUV420P_2x1()
136      p += priv->bytes_per_row[1];  in YCrCB_to_YUV420P_2x1()
139   p = priv->plane[2];  in YCrCB_to_YUV420P_2x1()
140   s = priv->Cr;  in YCrCB_to_YUV420P_2x1()
145      p += priv->bytes_per_row[2];  in YCrCB_to_YUV420P_2x1()
158 static void YCrCB_to_YUV420P_1x2(struct jdec_private *priv, int sx, int sy)  in YCrCB_to_YUV420P_1x2()  argument
164   p = priv->plane[0];  in YCrCB_to_YUV420P_1x2()
165   y = priv->Y;  in YCrCB_to_YUV420P_1x2()
169      p+=priv->bytes_per_row[0];  in YCrCB_to_YUV420P_1x2()
173   pr = priv->plane[1];  in YCrCB_to_YUV420P_1x2()
174   s = priv->Cb;  in YCrCB_to_YUV420P_1x2()
182      pr += priv->bytes_per_row[1];  in YCrCB_to_YUV420P_1x2()
185   pr = priv->plane[2];  in YCrCB_to_YUV420P_1x2()
186   s = priv->Cr;  in YCrCB_to_YUV420P_1x2()
194      pr += priv->bytes_per_row[2] - 4;  in YCrCB_to_YUV420P_1x2()
206 static void YCrCB_to_YUV420P_2x2(struct jdec_private *priv, int sx, int sy)  in YCrCB_to_YUV420P_2x2()  argument
212   p = priv->plane[0];  in YCrCB_to_YUV420P_2x2()
213   y1 = priv->Y;  in YCrCB_to_YUV420P_2x2()
217      p += priv->bytes_per_row[0];  in YCrCB_to_YUV420P_2x2()
223   p = priv->plane[1];  in YCrCB_to_YUV420P_2x2()
224   s = priv->Cb;  in YCrCB_to_YUV420P_2x2()
229      p += priv->bytes_per_row[1];  in YCrCB_to_YUV420P_2x2()
232   p = priv->plane[2];  in YCrCB_to_YUV420P_2x2()
233   s = priv->Cr;  in YCrCB_to_YUV420P_2x2()
238      p += priv->bytes_per_row[2];  in YCrCB_to_YUV420P_2x2()
242 static int initialize_yuv420p(struct jdec_private *priv,  in initialize_yuv420p()  argument
246   int half_height = (priv->height + 1) >> 2;  in initialize_yuv420p()
247   int half_width  = (priv->width  + 1) >> 2;  in initialize_yuv420p()
249   if (!priv->bytes_per_row[0])  in initialize_yuv420p()
250     priv->bytes_per_row[0] = priv->width;  in initialize_yuv420p()
251   if (!priv->components[0])  in initialize_yuv420p()
252     priv->components[0] = malloc(priv->height * priv->bytes_per_row[0]);  in initialize_yuv420p()
254   if (!priv->bytes_per_row[1])  in initialize_yuv420p()
255     priv->bytes_per_row[1] = half_width;  in initialize_yuv420p()
256   if (!priv->components[1])  in initialize_yuv420p()
257     priv->components[1] = malloc(half_height * priv->bytes_per_row[1]);  in initialize_yuv420p()
259   if (!priv->bytes_per_row[2])  in initialize_yuv420p()
260     priv->bytes_per_row[2] = half_width;  in initialize_yuv420p()
261   if (!priv->components[2])  in initialize_yuv420p()
262     priv->components[2] = malloc(half_height * priv->bytes_per_row[2]);  in initialize_yuv420p()
268   bytes_per_blocklines[0] = priv->width << 3;  in initialize_yuv420p()
273   return !priv->components[0] || !priv->components[1] || !priv->components[2];  in initialize_yuv420p()