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      1 
      2 #ifndef Py_YUV_H
      3 #define Py_YUV_H
      4 #ifdef __cplusplus
      5 extern "C" {
      6 #endif
      7 
      8 /*
      9  * SVideo YUV 4:1:1 format.
     10  *
     11  * 4 consecutive quadwords describe 8 pixels on 2 lines, as depicted
     12  * below.  An array of (width/4) of the below structure describes 2
     13  * scan lines.
     14  *
     15  * +-------------------+
     16  * | 00 | 01 | 02 | 03 | . . .
     17  * +-------------------+
     18  * | 10 | 11 | 12 | 13 | . . .
     19  * +-------------------+
     20  */
     21 struct yuv411 {
     22     struct {
     23         unsigned int dummy:8;
     24         unsigned int y0:8;
     25         unsigned int u0:2;
     26         unsigned int v0:2;
     27         unsigned int y1:8;
     28         unsigned int u1:2;
     29         unsigned int v1:2;
     30     } v[4];
     31 };
     32 
     33 #define YUV411_Y00(y)   (y).v[0].y0
     34 #define YUV411_Y01(y)   (y).v[1].y0
     35 #define YUV411_Y02(y)   (y).v[2].y0
     36 #define YUV411_Y03(y)   (y).v[3].y0
     37 #define YUV411_Y10(y)   (y).v[0].y1
     38 #define YUV411_Y11(y)   (y).v[1].y1
     39 #define YUV411_Y12(y)   (y).v[2].y1
     40 #define YUV411_Y13(y)   (y).v[3].y1
     41 #define YUV411_U00(y)   ((y).v[0].u0<<6|(y).v[1].u0<<4|(y).v[2].u0<<2|(y).v[3].u0)
     42 #define YUV411_U01(y)   YUV411_U00(y)
     43 #define YUV411_U02(y)   YUV411_U00(y)
     44 #define YUV411_U03(y)   YUV411_U00(y)
     45 #define YUV411_U10(y)   ((y).v[0].u1<<6|(y).v[1].u1<<4|(y).v[2].u1<<2|(y).v[3].u1)
     46 #define YUV411_U11(y)   YUV411_U10(y)
     47 #define YUV411_U12(y)   YUV411_U10(y)
     48 #define YUV411_U13(y)   YUV411_U10(y)
     49 #define YUV411_V00(y)   ((y).v[0].v0<<6|(y).v[1].v0<<4|(y).v[2].v0<<2|(y).v[3].v0)
     50 #define YUV411_V01(y)   YUV411_V00(y)
     51 #define YUV411_V02(y)   YUV411_V00(y)
     52 #define YUV411_V03(y)   YUV411_V00(y)
     53 #define YUV411_V10(y)   ((y).v[0].v1<<6|(y).v[1].v1<<4|(y).v[2].v1<<2|(y).v[3].v1)
     54 #define YUV411_V11(y)   YUV411_V10(y)
     55 #define YUV411_V12(y)   YUV411_V10(y)
     56 #define YUV411_V13(y)   YUV411_V10(y)
     57 
     58 /*
     59  * Compression Library YUV 4:2:2 format.
     60  *
     61  * 1 longword describes 2 pixels.
     62  *
     63  * +-------+
     64  * | 0 | 1 |
     65  * +-------+
     66  */
     67 struct yuv422 {
     68     unsigned int u:8;
     69     unsigned int y0:8;
     70     unsigned int v:8;
     71     unsigned int y1:8;
     72 };
     73 #define YUV422_Y0(y)    (y).y0
     74 #define YUV422_Y1(y)    (y).y1
     75 #define YUV422_U0(y)    (y).u
     76 #define YUV422_U1(y)    (y).u
     77 #define YUV422_V0(y)    (y).v
     78 #define YUV422_V1(y)    (y).v
     79 
     80 /*
     81  * Compression library YUV 4:2:2 Duplicate Chroma format.
     82  *
     83  * This is like the previous format, but the U and V values are
     84  * duplicated vertically (and hence there is some redundancy in the
     85  * data).  With other words, lines 2*n and 2*n+1 have the same U and V
     86  * values but different Y values.
     87  */
     88 
     89 /*
     90  * Conversion functions.
     91  */
     92 void yuv_sv411_to_cl422dc(int, void *, void *, int, int);
     93 void yuv_sv411_to_cl422dc_quartersize(int, void *, void *, int, int);
     94 void yuv_sv411_to_cl422dc_sixteenthsize(int, void *, void *, int, int);
     95 
     96 #ifdef __cplusplus
     97 }
     98 #endif
     99 #endif /* !Py_YUV_H */
    100