libmpcodecs/vf_flip.c

   1 /*
   2  * This file is part of MPlayer.
   3  *
   4  * MPlayer 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  * MPlayer 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 along
  15  * with MPlayer; if not, write to the Free Software Foundation, Inc.,
  16  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  17  */
  18
  19 #include <stdio.h>
  20 #include <stdlib.h>
  21 #include <string.h>
  22
  23 #include "config.h"
  24 #include "mp_msg.h"
  25
  26 #include "mp_image.h"
  27 #include "vf.h"
  28
  29 #include "libvo/video_out.h"
  30
  31 //===========================================================================//
  32
  33 static int config(struct vf_instance *vf,
  34         int width, int height, int d_width, int d_height,
  35         unsigned int flags, unsigned int outfmt){
  36     flags&=~VOFLAG_FLIPPING; // remove the FLIP flag
  37     return vf_next_config(vf,width,height,d_width,d_height,flags,outfmt);
  38 }
  39
  40 static void get_image(struct vf_instance *vf, mp_image_t *mpi){
  41     if(mpi->flags&MP_IMGFLAG_ACCEPT_STRIDE){
  42         // try full DR !
  43         vf->dmpi=vf_get_image(vf->next,mpi->imgfmt,
  44             mpi->type, mpi->flags, mpi->width, mpi->height);
  45         // set up mpi as a upside-down image of dmpi:
  46         mpi->planes[0]=vf->dmpi->planes[0]+
  47                     vf->dmpi->stride[0]*(vf->dmpi->height-1);
  48         mpi->stride[0]=-vf->dmpi->stride[0];
  49         if(mpi->flags&MP_IMGFLAG_PLANAR){
  50             mpi->planes[1]=vf->dmpi->planes[1]+
  51                     vf->dmpi->stride[1]*((vf->dmpi->height>>mpi->chroma_y_shift)-1);
  52             mpi->stride[1]=-vf->dmpi->stride[1];
  53             mpi->planes[2]=vf->dmpi->planes[2]+
  54                     vf->dmpi->stride[2]*((vf->dmpi->height>>mpi->chroma_y_shift)-1);
  55             mpi->stride[2]=-vf->dmpi->stride[2];
  56         }
  57         mpi->flags|=MP_IMGFLAG_DIRECT;
  58         mpi->priv=(void*)vf->dmpi;
  59     }
  60 }
  61
  62 static int put_image(struct vf_instance *vf, mp_image_t *mpi, double pts){
  63     if(mpi->flags&MP_IMGFLAG_DIRECT){
  64         // we've used DR, so we're ready...
  65         if(!(mpi->flags&MP_IMGFLAG_PLANAR))
  66             ((mp_image_t*)mpi->priv)->planes[1] = mpi->planes[1]; // passthrough rgb8 palette
  67         return vf_next_put_image(vf,(mp_image_t*)mpi->priv, pts);
  68     }
  69
  70     vf->dmpi=vf_get_image(vf->next,mpi->imgfmt,
  71         MP_IMGTYPE_EXPORT, MP_IMGFLAG_ACCEPT_STRIDE,
  72         mpi->width, mpi->height);
  73
  74     // set up mpi as a upside-down image of dmpi:
  75     vf->dmpi->planes[0]=mpi->planes[0]+
  76                     mpi->stride[0]*(mpi->height-1);
  77     vf->dmpi->stride[0]=-mpi->stride[0];
  78     if(vf->dmpi->flags&MP_IMGFLAG_PLANAR){
  79         vf->dmpi->planes[1]=mpi->planes[1]+
  80             mpi->stride[1]*((mpi->height>>mpi->chroma_y_shift)-1);
  81         vf->dmpi->stride[1]=-mpi->stride[1];
  82         vf->dmpi->planes[2]=mpi->planes[2]+
  83             mpi->stride[2]*((mpi->height>>mpi->chroma_y_shift)-1);
  84         vf->dmpi->stride[2]=-mpi->stride[2];
  85     } else
  86         vf->dmpi->planes[1]=mpi->planes[1]; // passthru bgr8 palette!!!
  87
  88     return vf_next_put_image(vf,vf->dmpi, pts);
  89 }
  90
  91 //===========================================================================//
  92
  93 static int vf_open(vf_instance_t *vf, char *args){
  94     vf->config=config;
  95     vf->get_image=get_image;
  96     vf->put_image=put_image;
  97     vf->default_reqs=VFCAP_ACCEPT_STRIDE;
  98     return 1;
  99 }
 100
 101 const vf_info_t vf_info_flip = {
 102     "flip image upside-down",
 103     "flip",
 104     "A'rpi",
 105     "",
 106     vf_open,
 107     NULL
 108 };
 109
 110 //===========================================================================//