Mercurial > cpython-lru_cache-weakref

annotate Modules/yuv.h @ 4566:6403c94de50d legacy-trunk

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Added safeguard against failure in __del__.
author Guido van Rossum <guido@python.org>
date Wed, 27 Nov 1996 19:39:58 +0000
parents 65d2d8e67da3
children 916fb024ce94
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1 /***********************************************************
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2 Copyright 1991-1995 by Stichting Mathematisch Centrum, Amsterdam,
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3 The Netherlands.
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4
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5 All Rights Reserved
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6
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7 Permission to use, copy, modify, and distribute this software and its
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8 documentation for any purpose and without fee is hereby granted,
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9 provided that the above copyright notice appear in all copies and that
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10 both that copyright notice and this permission notice appear in
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11 supporting documentation, and that the names of Stichting Mathematisch
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12 Centrum or CWI or Corporation for National Research Initiatives or
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13 CNRI not be used in advertising or publicity pertaining to
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14 distribution of the software without specific, written prior
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15 permission.
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16
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17 While CWI is the initial source for this software, a modified version
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18 is made available by the Corporation for National Research Initiatives
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19 (CNRI) at the Internet address ftp://ftp.python.org.
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20
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21 STICHTING MATHEMATISCH CENTRUM AND CNRI DISCLAIM ALL WARRANTIES WITH
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22 REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF
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23 MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL STICHTING MATHEMATISCH
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24 CENTRUM OR CNRI BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL
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25 DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
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26 PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
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27 TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
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28 PERFORMANCE OF THIS SOFTWARE.
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29
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30 ******************************************************************/
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31
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32 #ifndef Py_YUV_H
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33 #define Py_YUV_H
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34 #ifdef __cplusplus
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35 extern "C" {
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36 #endif
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37
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38 /*
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39 * SVideo YUV 4:1:1 format.
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40 *
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41 * 4 consecutive quadwords describe 8 pixels on 2 lines, as depicted
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42 * below. An array of (width/4) of the below structure describes 2
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43 * scan lines.
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44 *
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45 * +-------------------+
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46 * | 00 | 01 | 02 | 03 | . . .
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47 * +-------------------+
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48 * | 10 | 11 | 12 | 13 | . . .
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49 * +-------------------+
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50 */
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51 struct yuv411 {
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52 struct {
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53 unsigned int dummy:8;
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54 unsigned int y0:8;
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55 unsigned int u0:2;
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56 unsigned int v0:2;
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57 unsigned int y1:8;
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58 unsigned int u1:2;
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59 unsigned int v1:2;
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60 } v[4];
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61 };
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62
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63 #define YUV411_Y00(y) (y).v[0].y0
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64 #define YUV411_Y01(y) (y).v[1].y0
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65 #define YUV411_Y02(y) (y).v[2].y0
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66 #define YUV411_Y03(y) (y).v[3].y0
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67 #define YUV411_Y10(y) (y).v[0].y1
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68 #define YUV411_Y11(y) (y).v[1].y1
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69 #define YUV411_Y12(y) (y).v[2].y1
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70 #define YUV411_Y13(y) (y).v[3].y1
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71 #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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72 #define YUV411_U01(y) YUV411_U00(y)
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73 #define YUV411_U02(y) YUV411_U00(y)
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74 #define YUV411_U03(y) YUV411_U00(y)
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75 #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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76 #define YUV411_U11(y) YUV411_U10(y)
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77 #define YUV411_U12(y) YUV411_U10(y)
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78 #define YUV411_U13(y) YUV411_U10(y)
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79 #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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80 #define YUV411_V01(y) YUV411_V00(y)
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81 #define YUV411_V02(y) YUV411_V00(y)
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82 #define YUV411_V03(y) YUV411_V00(y)
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83 #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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84 #define YUV411_V11(y) YUV411_V10(y)
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85 #define YUV411_V12(y) YUV411_V10(y)
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86 #define YUV411_V13(y) YUV411_V10(y)
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87
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88 /*
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89 * Compression Library YUV 4:2:2 format.
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90 *
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91 * 1 longword describes 2 pixels.
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92 *
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93 * +-------+
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94 * | 0 | 1 |
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95 * +-------+
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96 */
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97 struct yuv422 {
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98 unsigned int u:8;
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99 unsigned int y0:8;
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100 unsigned int v:8;
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101 unsigned int y1:8;
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102 };
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103 #define YUV422_Y0(y) (y).y0
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104 #define YUV422_Y1(y) (y).y1
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105 #define YUV422_U0(y) (y).u
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106 #define YUV422_U1(y) (y).u
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107 #define YUV422_V0(y) (y).v
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108 #define YUV422_V1(y) (y).v
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109
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110 /*
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111 * Compression library YUV 4:2:2 Duplicate Chroma format.
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112 *
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113 * This is like the previous format, but the U and V values are
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114 * duplicated vertically (and hence there is some redundancy in the
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115 * data). With other words, lines 2*n and 2*n+1 have the same U and V
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116 * values but different Y values.
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117 */
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118
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119 /*
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120 * Conversion functions.
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121 */
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122 void yuv_sv411_to_cl422dc(int, void *, void *, int, int);
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123 void yuv_sv411_to_cl422dc_quartersize(int, void *, void *, int, int);
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124 void yuv_sv411_to_cl422dc_sixteenthsize(int, void *, void *, int, int);
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125
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126 #ifdef __cplusplus
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127 }
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128 #endif
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129 #endif /* !Py_YUV_H */