d2/vise_core.h

   1 // Copyright 2004 David Hilvert <dhilvert@auricle.dyndns.org>,
   2 //                              <dhilvert@ugcs.caltech.edu>
   3
   4 /*  This file is part of the Anti-Lamenessing Engine.
   5
   6     The Anti-Lamenessing Engine 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 3 of the License, or
   9     (at your option) any later version.
  10
  11     The Anti-Lamenessing Engine 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
  17     along with the Anti-Lamenessing Engine; if not, write to the Free Software
  18     Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19 */
  20
  21 /*
  22  * vise_core.h: Manages instances of vise.
  23  */
  24
  25 #ifndef __vise_core_h__
  26 #define __vise_core_h__
  27
  28 #include "vise.h"
  29 #include "image.h"
  30 #include "vise/ma.h"
  31 #include "vise/sf.h"
  32
  33 /*
  34  * Vise_core initializes, and maintains shared variables for, all instances of
  35  * vise.
  36  */
  37
  38 class vise_core {
  39         static vise **active;
  40         static unsigned int active_size;
  41         static ale_real scale_factor;
  42
  43 public:
  44
  45         /*
  46          * Set the VISE scale factor.
  47          */
  48         static void set_scale(ale_real factor) {
  49                 scale_factor = factor;
  50         }
  51
  52         /*
  53          * Add a new video stabilization engine.
  54          */
  55         static void add(render *chain, const char *type, const char *prefix, const char *suffix) {
  56
  57                 /*
  58                  * Instantiate an engine of the appropriate type.
  59                  */
  60                 if (!strcmp(type, "identity")) {
  61
  62                         /*
  63                          * Identity is a moving average 0 frames to either side.
  64                          */
  65                         active = (vise **) realloc(active, ++active_size * sizeof(vise *));
  66                         assert(active);
  67                         if (active == NULL) {
  68                                 fprintf(stderr, "\n\n*** VISE: Unable to allocate memory ***\n\n\n");
  69                                 exit(1);
  70                         }
  71                         active[active_size - 1] = new ma(chain, 0, prefix, suffix, scale_factor);
  72
  73                 } else if (!strncmp(type, "ma:", 3)) {
  74
  75                         /*
  76                          * Moving average with an unsigned range parameter.
  77                          */
  78
  79                         unsigned int range;
  80
  81                         if(sscanf(type + 3, "%u", &range) != 1) {
  82                                 fprintf(stderr, "\n\n*** VISE: 'ma:' type requires an unsigned argument. ***\n\n\n");
  83                                 exit(1);
  84                         }
  85
  86                         active = (vise **) realloc(active, ++active_size * sizeof(vise *));
  87                         assert(active);
  88                         if (active == NULL) {
  89                                 fprintf(stderr, "\n\n*** VISE: Unable to allocate memory ***\n\n\n");
  90                                 exit(1);
  91                         }
  92                         active[active_size - 1] = new ma(chain, range, prefix, suffix, scale_factor);
  93                 } else if (!strncmp(type, "sf:", 3)) {
  94
  95                         /*
  96                          * Single frame with an unsigned frame parameter.
  97                          */
  98
  99                         unsigned int frame;
 100
 101                         if(sscanf(type + 3, "%u", &frame) != 1) {
 102                                 fprintf(stderr, "\n\n*** VISE: 'sf:' type requires an unsigned argument. ***\n\n\n");
 103                                 exit(1);
 104                         }
 105
 106                         active = (vise **) realloc(active, ++active_size * sizeof(vise *));
 107                         assert(active);
 108                         if (active == NULL) {
 109                                 fprintf(stderr, "\n\n*** VISE: Unable to allocate memory ***\n\n\n");
 110                                 exit(1);
 111                         }
 112                         active[active_size - 1] = new sf(chain, frame, prefix, suffix, scale_factor);
 113
 114                 } else {
 115                         fprintf(stderr, "\n\n*** VISE: Unknown type '%s' ***\n\n\n", type);
 116                         exit(1);
 117                 }
 118
 119         }
 120
 121         /*
 122          * Add a new image to the rendering queue.
 123          */
 124         static void frame_queue_add(unsigned int frame_number) {
 125
 126                 /*
 127                  * Process the current queue.
 128                  */
 129                 for (unsigned int i = 0; i < active_size; i++) {
 130                         int lag = active[i]->lag();
 131
 132                         if ((int) frame_number - lag >= 0)
 133                                 active[i]->render_frame(frame_number - lag);
 134                 }
 135
 136                 /*
 137                  * If this is the last frame, then complete all rendering.
 138                  */
 139                 if (frame_number == image_rw::count() - 1)
 140                 for (unsigned int i = 0; i < active_size; i++)
 141                 for (int j = active[i]->lag() - 1; j >= 0; j--)
 142                         active[i]->render_frame(frame_number - j);
 143         }
 144 };
 145
 146 #endif