cinelerra-5.1/cinelerra/panautos.C

   1
   2 /*
   3  * CINELERRA
   4  * Copyright (C) 2008 Adam Williams <broadcast at earthling dot net>
   5  *
   6  * This program 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  * This program 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 this program; if not, write to the Free Software
  18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19  *
  20  */
  21
  22 #include "automation.inc"
  23 #include "panauto.h"
  24 #include "panautos.h"
  25 #include "transportque.inc"
  26
  27 PanAutos::PanAutos(EDL *edl, Track *track)
  28  : Autos(edl, track)
  29 {
  30         type = AUTOMATION_TYPE_PAN;
  31 }
  32
  33 PanAutos::~PanAutos()
  34 {
  35 }
  36
  37
  38 Auto* PanAutos::new_auto()
  39 {
  40         return new PanAuto(edl, this);
  41 }
  42
  43 void PanAutos::get_handle(int &handle_x,
  44                 int &handle_y,
  45                 int64_t position,
  46                 int direction,
  47                 PanAuto* &previous,
  48                 PanAuto* &next)
  49 {
  50         previous = (PanAuto*)get_prev_auto(position, direction, (Auto* &)previous);
  51         next = (PanAuto*)get_next_auto(position, direction, (Auto* &)next);
  52
  53 // Constant
  54         if(previous->handle_x == next->handle_x &&
  55                 previous->handle_y == next->handle_y)
  56         {
  57                 handle_x = previous->handle_x;
  58                 handle_y = previous->handle_y;
  59                 return;
  60         }
  61
  62 // Interpolate
  63         int64_t total = labs(next->position - previous->position);
  64         double fraction;
  65         if(direction == PLAY_FORWARD)
  66         {
  67                 fraction = (double)(position - previous->position) / total;
  68         }
  69         else
  70         {
  71                 fraction = (double)(previous->position - position) / total;
  72         }
  73
  74         handle_x = (int)(previous->handle_x + (next->handle_x - previous->handle_x) * fraction);
  75         handle_y = (int)(previous->handle_y + (next->handle_y - previous->handle_y) * fraction);
  76 }
  77
  78 void PanAutos::dump()
  79 {
  80         printf("        PanAutos::dump %p\n", this);
  81         printf("        Default: position %jd\n", default_auto->position);
  82         ((PanAuto*)default_auto)->dump();
  83         for(Auto* current = first; current; current = NEXT)
  84         {
  85                 printf("        position %jd\n", current->position);
  86                 ((PanAuto*)current)->dump();
  87         }
  88 }