Mercurial > cpython-lru_cache-weakref

annotate Modules/yuvconvert.c @ 5817:48b94de85bf3 legacy-trunk

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Extensive changes by AMK.
author Guido van Rossum <guido@python.org>
date Thu, 17 Jul 1997 16:29:42 +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 #include "yuv.h"
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33
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34 void
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35 yuv_sv411_to_cl422dc(int invert, void *data, void *yuv, int width, int height)
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36 {
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37 struct yuv411 *in = data;
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38 struct yuv422 *out_even = yuv;
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39 struct yuv422 *out_odd = out_even + width / 2;
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40 int i, j; /* counters */
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41
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42 for (i = height / 2; i--; ) {
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43 for (j = width / 4; j--; ) {
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44 YUV422_Y0(*out_even) = YUV411_Y00(*in);
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45 YUV422_U0(*out_even) = YUV411_U00(*in);
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46 YUV422_V0(*out_even) = YUV411_V00(*in);
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47 YUV422_Y1(*out_even) = YUV411_Y01(*in);
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48 out_even++;
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49 YUV422_Y0(*out_even) = YUV411_Y02(*in);
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50 YUV422_U0(*out_even) = YUV411_U02(*in);
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51 YUV422_V0(*out_even) = YUV411_V02(*in);
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52 YUV422_Y1(*out_even) = YUV411_Y03(*in);
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53 out_even++;
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54 YUV422_Y0(*out_odd) = YUV411_Y10(*in);
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55 YUV422_U0(*out_odd) = YUV411_U10(*in);
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56 YUV422_V0(*out_odd) = YUV411_V10(*in);
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57 YUV422_Y1(*out_odd) = YUV411_Y11(*in);
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58 out_odd++;
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59 YUV422_Y0(*out_odd) = YUV411_Y12(*in);
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60 YUV422_U0(*out_odd) = YUV411_U12(*in);
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61 YUV422_V0(*out_odd) = YUV411_V12(*in);
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62 YUV422_Y1(*out_odd) = YUV411_Y13(*in);
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63 out_odd++;
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64 in++;
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65 }
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66 out_even += width / 2;
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67 out_odd += width / 2;
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68 }
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69 }
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70
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71 void
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72 yuv_sv411_to_cl422dc_quartersize(int invert, void *data, void *yuv,
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73 int width, int height)
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74 {
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75 int w4 = width / 4; /* quarter of width is used often */
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76 struct yuv411 *in_even = data;
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77 struct yuv411 *in_odd = in_even + w4;
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78 struct yuv422 *out_even = yuv;
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79 struct yuv422 *out_odd = out_even + w4;
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80 int i, j; /* counters */
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81 int u, v; /* U and V values */
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82
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83 for (i = height / 4; i--; ) {
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84 for (j = w4; j--; ) {
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85 u = YUV411_U00(*in_even);
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86 v = YUV411_V00(*in_even);
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87
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88 YUV422_Y0(*out_even) = YUV411_Y00(*in_even);
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89 YUV422_U0(*out_even) = u;
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90 YUV422_V0(*out_even) = v;
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91 YUV422_Y1(*out_even) = YUV411_Y02(*in_even);
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92
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93 YUV422_Y0(*out_odd) = YUV411_Y10(*in_odd);
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94 YUV422_U0(*out_odd) = u;
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95 YUV422_V0(*out_odd) = v;
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96 YUV422_Y1(*out_odd) = YUV411_Y12(*in_odd);
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97
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98 in_even++;
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99 in_odd++;
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100 out_even++;
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101 out_odd++;
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102 }
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103 in_even += w4;
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104 in_odd += w4;
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105 out_even += w4;
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106 out_odd += w4;
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107 }
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108 }
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109
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110 void
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111 yuv_sv411_to_cl422dc_sixteenthsize(int invert, void *data, void *yuv,
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112 int width, int height)
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113 {
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114 int w4_3 = 3 * width / 4; /* three quarters of width is used often */
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115 int w8 = width / 8; /* and so is one eighth */
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116 struct yuv411 *in_even = data;
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117 struct yuv411 *in_odd = in_even + width / 2;
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118 struct yuv422 *out_even = yuv;
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119 struct yuv422 *out_odd = out_even + w8;
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120 int i, j; /* counters */
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121 int u, v; /* U and V values */
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122
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123 for (i = height / 8; i--; ) {
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124 for (j = w8; j--; ) {
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125 u = YUV411_U00(in_even[0]);
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126 v = YUV411_V00(in_even[0]);
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127
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128 YUV422_Y0(*out_even) = YUV411_Y00(in_even[0]);
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129 YUV422_U0(*out_even) = u;
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130 YUV422_V0(*out_even) = v;
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131 YUV422_Y1(*out_even) = YUV411_Y00(in_even[1]);
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132
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133 YUV422_Y0(*out_odd) = YUV411_Y00(in_odd[0]);
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134 YUV422_U0(*out_odd) = u;
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135 YUV422_V0(*out_odd) = v;
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136 YUV422_Y1(*out_odd) = YUV411_Y00(in_even[1]);
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137
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138 in_even += 2;
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139 in_odd += 2;
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140 out_even++;
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141 out_odd++;
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142 }
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143 in_even += w4_3;
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144 in_odd += w4_3;
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Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
145 out_even += w8;
685b31fe89c6 Added conversion routines to sv module.
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
146 out_odd += w8;
685b31fe89c6 Added conversion routines to sv module.
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
147 }
685b31fe89c6 Added conversion routines to sv module.
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
148 }