libmpcodecs/vf_rectangle.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 #include "mp_image.h"
  23 #include "mp_msg.h"
  24 #include "vf.h"
  25
  26 #include "libvo/fastmemcpy.h"
  27 #include "libavutil/common.h"
  28
  29 struct vf_priv_s {
  30     int x, y, w, h;
  31 };
  32
  33 static int
  34 config(struct vf_instance *vf,
  35        int width, int height, int d_width, int d_height,
  36        unsigned int flags, unsigned int outfmt)
  37 {
  38     if (vf->priv->w < 0 || width < vf->priv->w)
  39         vf->priv->w = width;
  40     if (vf->priv->h < 0 || height < vf->priv->h)
  41         vf->priv->h = height;
  42     if (vf->priv->x < 0)
  43         vf->priv->x = (width - vf->priv->w) / 2;
  44     if (vf->priv->y < 0)
  45         vf->priv->y = (height - vf->priv->h) / 2;
  46     if (vf->priv->w + vf->priv->x > width
  47         || vf->priv->h + vf->priv->y > height) {
  48         mp_msg(MSGT_VFILTER,MSGL_WARN,"rectangle: bad position/width/height - rectangle area is out of the original!\n");
  49         return 0;
  50     }
  51     return vf_next_config(vf, width, height, d_width, d_height, flags, outfmt);
  52 }
  53
  54 static int
  55 control(struct vf_instance *vf, int request, void *data)
  56 {
  57     const int *const tmp = data;
  58     switch(request){
  59     case VFCTRL_CHANGE_RECTANGLE:
  60         switch (tmp[0]){
  61         case 0:
  62             vf->priv->w += tmp[1];
  63             return 1;
  64             break;
  65         case 1:
  66             vf->priv->h += tmp[1];
  67             return 1;
  68             break;
  69         case 2:
  70             vf->priv->x += tmp[1];
  71             return 1;
  72             break;
  73         case 3:
  74             vf->priv->y += tmp[1];
  75             return 1;
  76             break;
  77         default:
  78             mp_msg(MSGT_VFILTER,MSGL_FATAL,"Unknown param %d \n", tmp[0]);
  79             return 0;
  80         }
  81     }
  82     return vf_next_control(vf, request, data);
  83     return 0;
  84 }
  85 static int
  86 put_image(struct vf_instance *vf, mp_image_t* mpi, double pts){
  87     mp_image_t* dmpi;
  88     unsigned int bpp = mpi->bpp / 8;
  89     int x, y, w, h;
  90     dmpi = vf_get_image(vf->next, mpi->imgfmt, MP_IMGTYPE_TEMP,
  91                         MP_IMGFLAG_ACCEPT_STRIDE | MP_IMGFLAG_PREFER_ALIGNED_STRIDE,
  92                         mpi->w, mpi->h);
  93
  94     memcpy_pic(dmpi->planes[0],mpi->planes[0],mpi->w*bpp, mpi->h,
  95                dmpi->stride[0],mpi->stride[0]);
  96     if(mpi->flags&MP_IMGFLAG_PLANAR && mpi->flags&MP_IMGFLAG_YUV){
  97         memcpy_pic(dmpi->planes[1],mpi->planes[1],
  98                    mpi->w>>mpi->chroma_x_shift, mpi->h>>mpi->chroma_y_shift,
  99                    dmpi->stride[1],mpi->stride[1]);
 100         memcpy_pic(dmpi->planes[2],mpi->planes[2],
 101                    mpi->w>>mpi->chroma_x_shift, mpi->h>>mpi->chroma_y_shift,
 102                    dmpi->stride[2],mpi->stride[2]);
 103     }
 104
 105     /* Draw the rectangle */
 106
 107     mp_msg(MSGT_VFILTER,MSGL_INFO, "rectangle: -vf rectangle=%d:%d:%d:%d \n", vf->priv->w, vf->priv->h, vf->priv->x, vf->priv->y);
 108
 109     x = FFMIN(vf->priv->x, dmpi->width);
 110     x = FFMAX(x, 0);
 111
 112     w = vf->priv->x + vf->priv->w - 1 - x;
 113     w = FFMIN(w, dmpi->width - x);
 114     w = FFMAX(w, 0);
 115
 116     y = FFMIN(vf->priv->y, dmpi->height);
 117     y = FFMAX(y, 0);
 118
 119     h = vf->priv->y + vf->priv->h - 1 - y;
 120     h = FFMIN(h, dmpi->height - y);
 121     h = FFMAX(h, 0);
 122
 123     if (0 <= vf->priv->y && vf->priv->y <= dmpi->height) {
 124         unsigned char *p = dmpi->planes[0] + y * dmpi->stride[0] + x * bpp;
 125         unsigned int count = w * bpp;
 126         while (count--)
 127             p[count] = 0xff - p[count];
 128     }
 129     if (h != 1 && vf->priv->y + vf->priv->h - 1 <= mpi->height) {
 130         unsigned char *p = dmpi->planes[0] + (vf->priv->y + vf->priv->h - 1) * dmpi->stride[0] + x * bpp;
 131         unsigned int count = w * bpp;
 132         while (count--)
 133             p[count] = 0xff - p[count];
 134     }
 135     if (0 <= vf->priv->x  && vf->priv->x <= dmpi->width) {
 136         unsigned char *p = dmpi->planes[0] + y * dmpi->stride[0] + x * bpp;
 137         unsigned int count = h;
 138         while (count--) {
 139             unsigned int i = bpp;
 140             while (i--)
 141                 p[i] = 0xff - p[i];
 142             p += dmpi->stride[0];
 143         }
 144     }
 145     if (w != 1 && vf->priv->x + vf->priv->w - 1 <= mpi->width) {
 146         unsigned char *p = dmpi->planes[0] + y * dmpi->stride[0] + (vf->priv->x + vf->priv->w - 1) * bpp;
 147         unsigned int count = h;
 148         while (count--) {
 149             unsigned int i = bpp;
 150             while (i--)
 151                 p[i] = 0xff - p[i];
 152             p += dmpi->stride[0];
 153         }
 154     }
 155     return vf_next_put_image(vf, dmpi, pts);
 156 }
 157
 158 static int
 159 vf_open(vf_instance_t *vf, char *args) {
 160     vf->config = config;
 161     vf->control = control;
 162     vf->put_image = put_image;
 163     vf->priv = malloc(sizeof(struct vf_priv_s));
 164     vf->priv->x = -1;
 165     vf->priv->y = -1;
 166     vf->priv->w = -1;
 167     vf->priv->h = -1;
 168     if (args)
 169         sscanf(args, "%d:%d:%d:%d",
 170                &vf->priv->w, &vf->priv->h, &vf->priv->x, &vf->priv->y);
 171     return 1;
 172 }
 173
 174 const vf_info_t vf_info_rectangle = {
 175     "draw rectangle",
 176     "rectangle",
 177     "Kim Minh Kaplan",
 178     "",
 179     vf_open,
 180     NULL
 181 };