l4/pkg/python/contrib/Modules/yuvconvert.c

   1
   2 #include "yuv.h"
   3
   4 void
   5 yuv_sv411_to_cl422dc(int invert, void *data, void *yuv, int width, int height)
   6 {
   7         struct yuv411 *in = data;
   8         struct yuv422 *out_even = yuv;
   9         struct yuv422 *out_odd = out_even + width / 2;
  10         int i, j;               /* counters */
  11
  12         for (i = height / 2; i--; ) {
  13                 for (j = width / 4; j--; ) {
  14                         YUV422_Y0(*out_even) = YUV411_Y00(*in);
  15                         YUV422_U0(*out_even) = YUV411_U00(*in);
  16                         YUV422_V0(*out_even) = YUV411_V00(*in);
  17                         YUV422_Y1(*out_even) = YUV411_Y01(*in);
  18                         out_even++;
  19                         YUV422_Y0(*out_even) = YUV411_Y02(*in);
  20                         YUV422_U0(*out_even) = YUV411_U02(*in);
  21                         YUV422_V0(*out_even) = YUV411_V02(*in);
  22                         YUV422_Y1(*out_even) = YUV411_Y03(*in);
  23                         out_even++;
  24                         YUV422_Y0(*out_odd) = YUV411_Y10(*in);
  25                         YUV422_U0(*out_odd) = YUV411_U10(*in);
  26                         YUV422_V0(*out_odd) = YUV411_V10(*in);
  27                         YUV422_Y1(*out_odd) = YUV411_Y11(*in);
  28                         out_odd++;
  29                         YUV422_Y0(*out_odd) = YUV411_Y12(*in);
  30                         YUV422_U0(*out_odd) = YUV411_U12(*in);
  31                         YUV422_V0(*out_odd) = YUV411_V12(*in);
  32                         YUV422_Y1(*out_odd) = YUV411_Y13(*in);
  33                         out_odd++;
  34                         in++;
  35                 }
  36                 out_even += width / 2;
  37                 out_odd += width / 2;
  38         }
  39 }
  40
  41 void
  42 yuv_sv411_to_cl422dc_quartersize(int invert, void *data, void *yuv,
  43                                  int width, int height)
  44 {
  45         int w4 = width / 4;     /* quarter of width is used often */
  46         struct yuv411 *in_even = data;
  47         struct yuv411 *in_odd = in_even + w4;
  48         struct yuv422 *out_even = yuv;
  49         struct yuv422 *out_odd = out_even + w4;
  50         int i, j;               /* counters */
  51         int u, v;               /* U and V values */
  52
  53         for (i = height / 4; i--; ) {
  54                 for (j = w4; j--; ) {
  55                         u = YUV411_U00(*in_even);
  56                         v = YUV411_V00(*in_even);
  57
  58                         YUV422_Y0(*out_even) = YUV411_Y00(*in_even);
  59                         YUV422_U0(*out_even) = u;
  60                         YUV422_V0(*out_even) = v;
  61                         YUV422_Y1(*out_even) = YUV411_Y02(*in_even);
  62
  63                         YUV422_Y0(*out_odd) = YUV411_Y10(*in_odd);
  64                         YUV422_U0(*out_odd) = u;
  65                         YUV422_V0(*out_odd) = v;
  66                         YUV422_Y1(*out_odd) = YUV411_Y12(*in_odd);
  67
  68                         in_even++;
  69                         in_odd++;
  70                         out_even++;
  71                         out_odd++;
  72                 }
  73                 in_even += w4;
  74                 in_odd += w4;
  75                 out_even += w4;
  76                 out_odd += w4;
  77         }
  78 }
  79
  80 void
  81 yuv_sv411_to_cl422dc_sixteenthsize(int invert, void *data, void *yuv,
  82                                    int width, int height)
  83 {
  84         int w4_3 = 3 * width / 4; /* three quarters of width is used often */
  85         int w8 = width / 8;     /* and so is one eighth */
  86         struct yuv411 *in_even = data;
  87         struct yuv411 *in_odd = in_even + width / 2;
  88         struct yuv422 *out_even = yuv;
  89         struct yuv422 *out_odd = out_even + w8;
  90         int i, j;               /* counters */
  91         int u, v;               /* U and V values */
  92
  93         for (i = height / 8; i--; ) {
  94                 for (j = w8; j--; ) {
  95                         u = YUV411_U00(in_even[0]);
  96                         v = YUV411_V00(in_even[0]);
  97
  98                         YUV422_Y0(*out_even) = YUV411_Y00(in_even[0]);
  99                         YUV422_U0(*out_even) = u;
 100                         YUV422_V0(*out_even) = v;
 101                         YUV422_Y1(*out_even) = YUV411_Y00(in_even[1]);
 102
 103                         YUV422_Y0(*out_odd) = YUV411_Y00(in_odd[0]);
 104                         YUV422_U0(*out_odd) = u;
 105                         YUV422_V0(*out_odd) = v;
 106                         YUV422_Y1(*out_odd) = YUV411_Y00(in_even[1]);
 107
 108                         in_even += 2;
 109                         in_odd += 2;
 110                         out_even++;
 111                         out_odd++;
 112                 }
 113                 in_even += w4_3;
 114                 in_odd += w4_3;
 115                 out_even += w8;
 116                 out_odd += w8;
 117         }
 118 }