cinelerra-5.1/cinelerra/vtracking.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 "asset.h"
  23 #include "assets.h"
  24 #include "edl.h"
  25 #include "edlsession.h"
  26 #include "localsession.h"
  27 #include "mainclock.h"
  28 #include "meterpanel.h"
  29 #include "mwindow.h"
  30 #include "renderengine.h"
  31 #include "mainclock.h"
  32 #include "vplayback.h"
  33 #include "vrender.h"
  34 #include "vtimebar.h"
  35 #include "vtracking.h"
  36 #include "vwindow.h"
  37 #include "vwindowgui.h"
  38
  39
  40 VTracking::VTracking(MWindow *mwindow, VWindow *vwindow)
  41  : Tracking(mwindow)
  42 {
  43         this->vwindow = vwindow;
  44 }
  45
  46 VTracking::~VTracking()
  47 {
  48 }
  49
  50 PlaybackEngine* VTracking::get_playback_engine()
  51 {
  52         return vwindow->playback_engine;
  53 }
  54
  55 void VTracking::update_tracker(double position)
  56 {
  57         if( !vwindow->get_edl() ) return;
  58         vwindow->gui->lock_window("VTracking::update_tracker");
  59         vwindow->get_edl()->local_session->set_selectionstart(position);
  60         vwindow->get_edl()->local_session->set_selectionend(position);
  61
  62         Asset *asset = vwindow->get_edl()->assets->first;
  63         if( asset && asset->tcstart ) {
  64                 double rate = asset->video_data ? asset->frame_rate :
  65                         asset->audio_data ? asset->sample_rate : 0;
  66                 if( rate > 0 )
  67                         position += asset->tcstart / rate;
  68         }
  69         vwindow->gui->clock->update(position);
  70
  71 // This is going to boost the latency but we need to update the timebar
  72         vwindow->gui->timebar->update(1);
  73
  74         vwindow->gui->unlock_window();
  75
  76         update_meters((int64_t)(position * mwindow->edl->session->sample_rate));
  77 }
  78
  79 int VTracking::start_playback(double new_position)
  80 {
  81
  82         return Tracking::start_playback(new_position);
  83 }
  84
  85 void VTracking::update_meters(int64_t position)
  86 {
  87         double output_levels[MAXCHANNELS];
  88
  89         int do_audio = get_playback_engine()->get_output_levels(output_levels,
  90                 position);
  91         if(do_audio)
  92         {
  93                 vwindow->gui->lock_window("VTracking::update_meters");
  94                 vwindow->gui->meters->update(output_levels);
  95                 vwindow->gui->unlock_window();
  96         }
  97 }
  98
  99 void VTracking::stop_meters()
 100 {
 101         vwindow->gui->lock_window("VTracking::stop_meters");
 102         vwindow->gui->meters->stop_meters();
 103         vwindow->gui->unlock_window();
 104 }
 105
 106 void VTracking::draw()
 107 {
 108 }