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annotate Modules/yuv.h @ 79675:c0a2294de787 2.7

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Issue #16199: Backport 2to3 typo fix from 3.2.
author Chris Jerdonek <chris.jerdonek@gmail.com>
date Thu, 11 Oct 2012 16:15:46 -0700
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children
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1940892d2fe3 Merge alpha100 branch back to main trunk
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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 */