libmpcodecs/vf_il.c

   1 /*
   2  * Copyright (C) 2002 Michael Niedermayer <michaelni@gmx.at>
   3  *
   4  * This file is part of MPlayer.
   5  *
   6  * MPlayer is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * MPlayer is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License along
  17  * with MPlayer; if not, write to the Free Software Foundation, Inc.,
  18  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  19  */
  20
  21 #include <stdio.h>
  22 #include <stdlib.h>
  23 #include <string.h>
  24 #include <inttypes.h>
  25 #include <assert.h>
  26
  27 #include "config.h"
  28 #include "mp_msg.h"
  29
  30 #ifdef HAVE_MALLOC_H
  31 #include <malloc.h>
  32 #endif
  33
  34 #include "img_format.h"
  35 #include "mp_image.h"
  36 #include "vf.h"
  37 #include "libvo/fastmemcpy.h"
  38
  39
  40 //===========================================================================//
  41
  42 typedef struct FilterParam{
  43         int interleave;
  44         int swap;
  45 }FilterParam;
  46
  47 struct vf_priv_s {
  48         FilterParam lumaParam;
  49         FilterParam chromaParam;
  50 };
  51
  52 /***************************************************************************/
  53
  54 static void interleave(uint8_t *dst, uint8_t *src, int w, int h, int dstStride, int srcStride, int interleave, int swap){
  55         const int a= swap;
  56         const int b= 1-a;
  57         const int m= h>>1;
  58         int y;
  59
  60         switch(interleave){
  61         case -1:
  62                 for(y=0; y < m; y++){
  63                         fast_memcpy(dst + dstStride* y     , src + srcStride*(y*2 + a), w);
  64                         fast_memcpy(dst + dstStride*(y + m), src + srcStride*(y*2 + b), w);
  65                 }
  66                 break;
  67         case 0:
  68                 for(y=0; y < m; y++){
  69                         fast_memcpy(dst + dstStride* y*2   , src + srcStride*(y*2 + a), w);
  70                         fast_memcpy(dst + dstStride*(y*2+1), src + srcStride*(y*2 + b), w);
  71                 }
  72                 break;
  73         case 1:
  74                 for(y=0; y < m; y++){
  75                         fast_memcpy(dst + dstStride*(y*2+a), src + srcStride* y     , w);
  76                         fast_memcpy(dst + dstStride*(y*2+b), src + srcStride*(y + m), w);
  77                 }
  78                 break;
  79         }
  80 }
  81
  82 static int put_image(struct vf_instance_s* vf, mp_image_t *mpi, double pts){
  83         int w;
  84         FilterParam *luma  = &vf->priv->lumaParam;
  85         FilterParam *chroma= &vf->priv->chromaParam;
  86
  87         mp_image_t *dmpi=vf_get_image(vf->next,mpi->imgfmt,
  88                 MP_IMGTYPE_TEMP, MP_IMGFLAG_ACCEPT_STRIDE,
  89                 mpi->w,mpi->h);
  90
  91         if(mpi->flags&MP_IMGFLAG_PLANAR)
  92                 w= mpi->w;
  93         else
  94                 w= mpi->w * mpi->bpp/8;
  95
  96         interleave(dmpi->planes[0], mpi->planes[0],
  97                 w, mpi->h, dmpi->stride[0], mpi->stride[0], luma->interleave, luma->swap);
  98
  99         if(mpi->flags&MP_IMGFLAG_PLANAR){
 100                 int cw= mpi->w >> mpi->chroma_x_shift;
 101                 int ch= mpi->h >> mpi->chroma_y_shift;
 102
 103                 interleave(dmpi->planes[1], mpi->planes[1], cw,ch,
 104                         dmpi->stride[1], mpi->stride[1], chroma->interleave, luma->swap);
 105                 interleave(dmpi->planes[2], mpi->planes[2], cw,ch,
 106                         dmpi->stride[2], mpi->stride[2], chroma->interleave, luma->swap);
 107         }
 108
 109         return vf_next_put_image(vf,dmpi, pts);
 110 }
 111
 112 //===========================================================================//
 113
 114 static void parse(FilterParam *fp, char* args){
 115         char *pos;
 116         char *max= strchr(args, ':');
 117
 118         if(!max) max= args + strlen(args);
 119
 120         pos= strchr(args, 's');
 121         if(pos && pos<max) fp->swap=1;
 122         pos= strchr(args, 'i');
 123         if(pos && pos<max) fp->interleave=1;
 124         pos= strchr(args, 'd');
 125         if(pos && pos<max) fp->interleave=-1;
 126 }
 127
 128 static int open(vf_instance_t *vf, char* args){
 129
 130         vf->put_image=put_image;
 131 //      vf->get_image=get_image;
 132         vf->priv=malloc(sizeof(struct vf_priv_s));
 133         memset(vf->priv, 0, sizeof(struct vf_priv_s));
 134
 135         if(args)
 136         {
 137                 char *arg2= strchr(args,':');
 138                 if(arg2) parse(&vf->priv->chromaParam, arg2+1);
 139                 parse(&vf->priv->lumaParam, args);
 140         }
 141
 142         return 1;
 143 }
 144
 145 const vf_info_t vf_info_il = {
 146     "(de)interleave",
 147     "il",
 148     "Michael Niedermayer",
 149     "",
 150     open,
 151     NULL
 152 };
 153
 154 //===========================================================================//