libmpcodecs/vf_il.c

   1 /*
   2     Copyright (C) 2002 Michael Niedermayer <michaelni@gmx.at>
   3
   4     This program is free software; you can redistribute it and/or modify
   5     it under the terms of the GNU General Public License as published by
   6     the Free Software Foundation; either version 2 of the License, or
   7     (at your option) any later version.
   8
   9     This program is distributed in the hope that it will be useful,
  10     but WITHOUT ANY WARRANTY; without even the implied warranty of
  11     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12     GNU General Public License for more details.
  13
  14     You should have received a copy of the GNU General Public License
  15     along with this program; if not, write to the Free Software
  16     Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
  17 */
  18
  19 #include <stdio.h>
  20 #include <stdlib.h>
  21 #include <string.h>
  22 #include <inttypes.h>
  23 #include <assert.h>
  24
  25 #include "config.h"
  26 #include "mp_msg.h"
  27
  28 #ifdef HAVE_MALLOC_H
  29 #include <malloc.h>
  30 #endif
  31
  32 #include "img_format.h"
  33 #include "mp_image.h"
  34 #include "vf.h"
  35 #include "libvo/fastmemcpy.h"
  36
  37
  38 //===========================================================================//
  39
  40 typedef struct FilterParam{
  41         int interleave;
  42         int swap;
  43 }FilterParam;
  44
  45 struct vf_priv_s {
  46         FilterParam lumaParam;
  47         FilterParam chromaParam;
  48 };
  49
  50 /***************************************************************************/
  51
  52 static void interleave(uint8_t *dst, uint8_t *src, int w, int h, int dstStride, int srcStride, int interleave, int swap){
  53         const int a= swap;
  54         const int b= 1-a;
  55         const int m= h>>1;
  56         int y;
  57
  58         switch(interleave){
  59         case -1:
  60                 for(y=0; y < m; y++){
  61                         fast_memcpy(dst + dstStride* y     , src + srcStride*(y*2 + a), w);
  62                         fast_memcpy(dst + dstStride*(y + m), src + srcStride*(y*2 + b), w);
  63                 }
  64                 break;
  65         case 0:
  66                 for(y=0; y < m; y++){
  67                         fast_memcpy(dst + dstStride* y*2   , src + srcStride*(y*2 + a), w);
  68                         fast_memcpy(dst + dstStride*(y*2+1), src + srcStride*(y*2 + b), w);
  69                 }
  70                 break;
  71         case 1:
  72                 for(y=0; y < m; y++){
  73                         fast_memcpy(dst + dstStride*(y*2+a), src + srcStride* y     , w);
  74                         fast_memcpy(dst + dstStride*(y*2+b), src + srcStride*(y + m), w);
  75                 }
  76                 break;
  77         }
  78 }
  79
  80 static int put_image(struct vf_instance_s* vf, mp_image_t *mpi, double pts){
  81         int w;
  82         FilterParam *luma  = &vf->priv->lumaParam;
  83         FilterParam *chroma= &vf->priv->chromaParam;
  84
  85         mp_image_t *dmpi=vf_get_image(vf->next,mpi->imgfmt,
  86                 MP_IMGTYPE_TEMP, MP_IMGFLAG_ACCEPT_STRIDE,
  87                 mpi->w,mpi->h);
  88
  89         if(mpi->flags&MP_IMGFLAG_PLANAR)
  90                 w= mpi->w;
  91         else
  92                 w= mpi->w * mpi->bpp/8;
  93
  94         interleave(dmpi->planes[0], mpi->planes[0],
  95                 w, mpi->h, dmpi->stride[0], mpi->stride[0], luma->interleave, luma->swap);
  96
  97         if(mpi->flags&MP_IMGFLAG_PLANAR){
  98                 int cw= mpi->w >> mpi->chroma_x_shift;
  99                 int ch= mpi->h >> mpi->chroma_y_shift;
 100
 101                 interleave(dmpi->planes[1], mpi->planes[1], cw,ch,
 102                         dmpi->stride[1], mpi->stride[1], chroma->interleave, luma->swap);
 103                 interleave(dmpi->planes[2], mpi->planes[2], cw,ch,
 104                         dmpi->stride[2], mpi->stride[2], chroma->interleave, luma->swap);
 105         }
 106
 107         return vf_next_put_image(vf,dmpi, pts);
 108 }
 109
 110 //===========================================================================//
 111
 112 static void parse(FilterParam *fp, char* args){
 113         char *pos;
 114         char *max= strchr(args, ':');
 115
 116         if(!max) max= args + strlen(args);
 117
 118         pos= strchr(args, 's');
 119         if(pos && pos<max) fp->swap=1;
 120         pos= strchr(args, 'i');
 121         if(pos && pos<max) fp->interleave=1;
 122         pos= strchr(args, 'd');
 123         if(pos && pos<max) fp->interleave=-1;
 124 }
 125
 126 static int open(vf_instance_t *vf, char* args){
 127
 128         vf->put_image=put_image;
 129 //      vf->get_image=get_image;
 130         vf->priv=malloc(sizeof(struct vf_priv_s));
 131         memset(vf->priv, 0, sizeof(struct vf_priv_s));
 132
 133         if(args)
 134         {
 135                 char *arg2= strchr(args,':');
 136                 if(arg2) parse(&vf->priv->chromaParam, arg2+1);
 137                 parse(&vf->priv->lumaParam, args);
 138         }
 139
 140         return 1;
 141 }
 142
 143 const vf_info_t vf_info_il = {
 144     "(de)interleave",
 145     "il",
 146     "Michael Niedermayer",
 147     "",
 148     open,
 149     NULL
 150 };
 151
 152 //===========================================================================//