libmpcodecs/vf_down3dright.c

   1 #include <stdio.h>
   2 #include <stdlib.h>
   3 #include <string.h>
   4 #include <inttypes.h>
   5
   6 #include "config.h"
   7 #include "mp_msg.h"
   8 #include "cpudetect.h"
   9
  10 #include "img_format.h"
  11 #include "mp_image.h"
  12 #include "vf.h"
  13
  14 #include "libvo/fastmemcpy.h"
  15
  16 struct vf_priv_s {
  17         int skipline;
  18         int scalew;
  19         int scaleh;
  20 };
  21
  22 static void toright(unsigned char *dst[3], unsigned char *src[3],
  23                     int dststride[3], int srcstride[3],
  24                     int w, int h, struct vf_priv_s* p)
  25 {
  26         int k;
  27
  28         for (k = 0; k < 3; k++) {
  29                 unsigned char* fromL = src[k];
  30                 unsigned char* fromR = src[k];
  31                 unsigned char* to = dst[k];
  32                 int src = srcstride[k];
  33                 int dst = dststride[k];
  34                 int ss;
  35                 unsigned int dd;
  36                 int i;
  37
  38                 if (k > 0) {
  39                         i = h / 4 - p->skipline / 2;
  40                         ss = src * (h / 4 + p->skipline / 2);
  41                         dd = w / 4;
  42                 } else {
  43                         i = h / 2 - p->skipline;
  44                         ss = src * (h / 2 + p->skipline);
  45                         dd = w / 2;
  46                 }
  47                 fromR += ss;
  48                 for ( ; i > 0; i--) {
  49                         int j;
  50                         unsigned char* t = to;
  51                         unsigned char* sL = fromL;
  52                         unsigned char* sR = fromR;
  53
  54                         if (p->scalew == 1) {
  55                                 for (j = dd; j > 0; j--) {
  56                                         *t++ = (sL[0] + sL[1]) / 2;
  57                                         sL+=2;
  58                                 }
  59                                 for (j = dd ; j > 0; j--) {
  60                                         *t++ = (sR[0] + sR[1]) / 2;
  61                                         sR+=2;
  62                                 }
  63                         } else {
  64                                 for (j = dd * 2 ; j > 0; j--)
  65                                         *t++ = *sL++;
  66                                 for (j = dd * 2 ; j > 0; j--)
  67                                         *t++ = *sR++;
  68                         }
  69                         if (p->scaleh == 1) {
  70                                 fast_memcpy(to + dst, to, dst);
  71                                 to += dst;
  72                         }
  73                         to += dst;
  74                         fromL += src;
  75                         fromR += src;
  76                 }
  77                 //printf("K %d  %d   %d   %d  %d \n", k, w, h,  src, dst);
  78         }
  79 }
  80
  81 static int put_image(struct vf_instance* vf, mp_image_t *mpi, double pts)
  82 {
  83         mp_image_t *dmpi;
  84
  85         // hope we'll get DR buffer:
  86         dmpi=vf_get_image(vf->next, IMGFMT_YV12,
  87                           MP_IMGTYPE_TEMP, MP_IMGFLAG_ACCEPT_STRIDE |
  88                           (vf->priv->scaleh == 1) ? MP_IMGFLAG_READABLE : 0,
  89                           mpi->w * vf->priv->scalew,
  90                           mpi->h / vf->priv->scaleh - vf->priv->skipline);
  91
  92         toright(dmpi->planes, mpi->planes, dmpi->stride,
  93                 mpi->stride, mpi->w, mpi->h, vf->priv);
  94
  95         return vf_next_put_image(vf,dmpi, pts);
  96 }
  97
  98 static int config(struct vf_instance* vf,
  99                   int width, int height, int d_width, int d_height,
 100                   unsigned int flags, unsigned int outfmt)
 101 {
 102         /* FIXME - also support UYVY output? */
 103         return vf_next_config(vf, width * vf->priv->scalew,
 104                               height / vf->priv->scaleh - vf->priv->skipline, d_width, d_height, flags, IMGFMT_YV12);
 105 }
 106
 107
 108 static int query_format(struct vf_instance* vf, unsigned int fmt)
 109 {
 110         /* FIXME - really any YUV 4:2:0 input format should work */
 111         switch (fmt) {
 112         case IMGFMT_YV12:
 113         case IMGFMT_IYUV:
 114         case IMGFMT_I420:
 115                 return vf_next_query_format(vf, IMGFMT_YV12);
 116         }
 117         return 0;
 118 }
 119
 120 static void uninit(struct vf_instance* vf)
 121 {
 122         free(vf->priv);
 123 }
 124
 125 static int open(vf_instance_t *vf, char* args)
 126 {
 127         vf->config=config;
 128         vf->query_format=query_format;
 129         vf->put_image=put_image;
 130         vf->uninit=uninit;
 131
 132         vf->priv = calloc(1, sizeof (struct vf_priv_s));
 133         vf->priv->skipline = 0;
 134         vf->priv->scalew = 1;
 135         vf->priv->scaleh = 2;
 136         if (args) sscanf(args, "%d:%d:%d", &vf->priv->skipline, &vf->priv->scalew, &vf->priv->scaleh);
 137
 138         return 1;
 139 }
 140
 141 const vf_info_t vf_info_down3dright = {
 142         "convert stereo movie from top-bottom to left-right field",
 143         "down3dright",
 144         "Zdenek Kabelac",
 145         "",
 146         open,
 147         NULL
 148 };
 149