cinelerra-5.1/cinelerra/ctracking.C

   1
   2 /*
   3  * CINELERRA
   4  * Copyright (C) 2008 Adam Williams <broadcast at earthling dot net>
   5  * Copyright (C) 2003-2016 Cinelerra CV contributors
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License as published by
   9  * the Free Software Foundation; either version 2 of the License, or
  10  * (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with this program; if not, write to the Free Software
  19  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  20  *
  21  */
  22
  23 #include "bcsignals.h"
  24 #include "cplayback.h"
  25 #include "ctimebar.h"
  26 #include "ctracking.h"
  27 #include "cwindow.h"
  28 #include "cwindowgui.h"
  29 #include "edl.h"
  30 #include "edlsession.h"
  31 #include "localsession.h"
  32 #include "mainclock.h"
  33 #include "maincursor.h"
  34 #include "mtimebar.h"
  35 #include "mwindow.h"
  36 #include "mwindowgui.h"
  37 #include "patchbay.h"
  38 #include "trackcanvas.h"
  39 #include "transportque.h"
  40 #include "zoombar.h"
  41
  42 CTracking::CTracking(MWindow *mwindow, CWindow *cwindow)
  43  : Tracking(mwindow)
  44 {
  45         this->cwindow = cwindow;
  46 }
  47
  48 CTracking::~CTracking()
  49 {
  50 }
  51
  52 PlaybackEngine* CTracking::get_playback_engine()
  53 {
  54         return cwindow->playback_engine;
  55 }
  56
  57 int CTracking::start_playback(double new_position, int active)
  58 {
  59         mwindow->gui->set_playing_back(1);
  60         if( active )
  61                 mwindow->edl->local_session->set_playback_start(new_position);
  62         return Tracking::start_playback(new_position);
  63 }
  64
  65 int CTracking::stop_playback()
  66 {
  67         mwindow->gui->set_playing_back(0);
  68         Tracking::stop_playback();
  69         mwindow->stop_plugin_guis();
  70         mwindow->edl->local_session->set_playback_end(get_tracking_position());
  71         return 0;
  72 }
  73
  74 #define SCROLL_THRESHOLD .5
  75
  76
  77 int CTracking::update_scroll(double position)
  78 {
  79         int updated_scroll = 0;
  80
  81         if(mwindow->edl->session->view_follows_playback)
  82         {
  83                 TimelinePane *pane = mwindow->gui->get_focused_pane();
  84                 double seconds_per_pixel = (double)mwindow->edl->local_session->zoom_sample /
  85                         mwindow->edl->session->sample_rate;
  86                 double half_canvas = seconds_per_pixel *
  87                         pane->canvas->get_w() / 2;
  88                 double midpoint = mwindow->edl->local_session->view_start[pane->number] *
  89                         seconds_per_pixel +
  90                         half_canvas;
  91
  92                 if(get_playback_engine()->command->get_direction() == PLAY_FORWARD)
  93                 {
  94                         double left_boundary = midpoint + SCROLL_THRESHOLD * half_canvas;
  95                         double right_boundary = midpoint + half_canvas;
  96
  97                         if(position > left_boundary &&
  98                                 position < right_boundary)
  99                         {
 100                                 int pixels = Units::to_int64((position - left_boundary) *
 101                                                 mwindow->edl->session->sample_rate /
 102                                                 mwindow->edl->local_session->zoom_sample);
 103                                 if(pixels)
 104                                 {
 105                                         mwindow->move_right(pixels);
 106 //printf("CTracking::update_scroll 1 %d\n", pixels);
 107                                         updated_scroll = 1;
 108                                 }
 109                         }
 110                 }
 111                 else
 112                 {
 113                         double right_boundary = midpoint - SCROLL_THRESHOLD * half_canvas;
 114                         double left_boundary = midpoint - half_canvas;
 115
 116                         if(position < right_boundary &&
 117                                 position > left_boundary &&
 118                                 mwindow->edl->local_session->view_start[pane->number] > 0)
 119                         {
 120                                 int pixels = Units::to_int64((right_boundary - position) *
 121                                                 mwindow->edl->session->sample_rate /
 122                                                 mwindow->edl->local_session->zoom_sample);
 123                                 if(pixels)
 124                                 {
 125                                         mwindow->move_left(pixels);
 126                                         updated_scroll = 1;
 127                                 }
 128                         }
 129                 }
 130         }
 131
 132         return updated_scroll;
 133 }
 134
 135 void CTracking::update_tracker(double position)
 136 {
 137         int updated_scroll = 0;
 138         cwindow->gui->lock_window("CTracking::update_tracker 1");
 139
 140 // This is going to boost the latency but we need to update the timebar
 141         cwindow->gui->timebar->update(1);
 142 //      cwindow->gui->timebar->flash();
 143         cwindow->gui->unlock_window();
 144
 145 // Update mwindow cursor
 146         mwindow->gui->lock_window("CTracking::update_tracker 2");
 147
 148         mwindow->edl->local_session->set_selectionstart(position);
 149         mwindow->edl->local_session->set_selectionend(position);
 150
 151         updated_scroll = update_scroll(position);
 152
 153         mwindow->gui->mainclock->update(position);
 154         mwindow->gui->update_patchbay();
 155         mwindow->gui->update_timebar(0);
 156
 157         if(!updated_scroll)
 158         {
 159                 mwindow->gui->update_cursor();
 160                 // we just need to update clocks, not everything
 161                 mwindow->gui->zoombar->update_clocks();
 162
 163                 for(int i = 0; i < TOTAL_PANES; i++)
 164                         if(mwindow->gui->pane[i])
 165                                 mwindow->gui->pane[i]->canvas->flash(0);
 166         }
 167
 168         mwindow->gui->flush();
 169         mwindow->gui->unlock_window();
 170
 171 // Plugin GUI's hold lock on mwindow->gui here during user interface handlers.
 172         mwindow->update_plugin_guis();
 173
 174
 175         update_meters((int64_t)(position * mwindow->edl->session->sample_rate));
 176 }
 177
 178 void CTracking::draw()
 179 {
 180 }