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