cinelerra-5.1/cinelerra/ctracking.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 "bcsignals.h"
  23 #include "cplayback.h"
  24 #include "ctimebar.h"
  25 #include "ctracking.h"
  26 #include "cwindow.h"
  27 #include "cwindowgui.h"
  28 #include "edl.h"
  29 #include "edlsession.h"
  30 #include "localsession.h"
  31 #include "mainclock.h"
  32 #include "maincursor.h"
  33 #include "mtimebar.h"
  34 #include "mwindow.h"
  35 #include "mwindowgui.h"
  36 #include "patchbay.h"
  37 #include "trackcanvas.h"
  38 #include "transportque.h"
  39 #include "zoombar.h"
  40
  41 CTracking::CTracking(MWindow *mwindow, CWindow *cwindow)
  42  : Tracking(mwindow)
  43 {
  44         this->cwindow = cwindow;
  45 }
  46
  47 CTracking::~CTracking()
  48 {
  49 }
  50
  51 PlaybackEngine* CTracking::get_playback_engine()
  52 {
  53         return cwindow->playback_engine;
  54 }
  55
  56 int CTracking::start_playback(double new_position, int active)
  57 {
  58         mwindow->gui->set_playing_back(1);
  59         if( active )
  60                 mwindow->edl->local_session->set_playback_start(new_position);
  61         return Tracking::start_playback(new_position);
  62 }
  63
  64 int CTracking::stop_playback()
  65 {
  66         mwindow->gui->set_playing_back(0);
  67         Tracking::stop_playback();
  68         mwindow->edl->local_session->set_playback_end(get_tracking_position());
  69         return 0;
  70 }
  71
  72 #define SCROLL_THRESHOLD .5
  73
  74
  75 int CTracking::update_scroll(double position)
  76 {
  77         int updated_scroll = 0;
  78
  79         if(mwindow->edl->session->view_follows_playback)
  80         {
  81                 TimelinePane *pane = mwindow->gui->get_focused_pane();
  82                 double seconds_per_pixel = (double)mwindow->edl->local_session->zoom_sample /
  83                         mwindow->edl->session->sample_rate;
  84                 double half_canvas = seconds_per_pixel *
  85                         pane->canvas->get_w() / 2;
  86                 double midpoint = mwindow->edl->local_session->view_start[pane->number] *
  87                         seconds_per_pixel +
  88                         half_canvas;
  89
  90                 if(get_playback_engine()->command->get_direction() == PLAY_FORWARD)
  91                 {
  92                         double left_boundary = midpoint + SCROLL_THRESHOLD * half_canvas;
  93                         double right_boundary = midpoint + half_canvas;
  94
  95                         if(position > left_boundary &&
  96                                 position < right_boundary)
  97                         {
  98                                 int pixels = Units::to_int64((position - left_boundary) *
  99                                                 mwindow->edl->session->sample_rate /
 100                                                 mwindow->edl->local_session->zoom_sample);
 101                                 if(pixels)
 102                                 {
 103                                         mwindow->move_right(pixels);
 104 //printf("CTracking::update_scroll 1 %d\n", pixels);
 105                                         updated_scroll = 1;
 106                                 }
 107                         }
 108                 }
 109                 else
 110                 {
 111                         double right_boundary = midpoint - SCROLL_THRESHOLD * half_canvas;
 112                         double left_boundary = midpoint - half_canvas;
 113
 114                         if(position < right_boundary &&
 115                                 position > left_boundary &&
 116                                 mwindow->edl->local_session->view_start[pane->number] > 0)
 117                         {
 118                                 int pixels = Units::to_int64((right_boundary - position) *
 119                                                 mwindow->edl->session->sample_rate /
 120                                                 mwindow->edl->local_session->zoom_sample);
 121                                 if(pixels)
 122                                 {
 123                                         mwindow->move_left(pixels);
 124                                         updated_scroll = 1;
 125                                 }
 126                         }
 127                 }
 128         }
 129
 130         return updated_scroll;
 131 }
 132
 133 void CTracking::update_tracker(double position)
 134 {
 135         int updated_scroll = 0;
 136         cwindow->gui->lock_window("CTracking::update_tracker 1");
 137
 138 // This is going to boost the latency but we need to update the timebar
 139         cwindow->gui->timebar->update(1);
 140 //      cwindow->gui->timebar->flash();
 141         cwindow->gui->unlock_window();
 142
 143 // Update mwindow cursor
 144         mwindow->gui->lock_window("CTracking::update_tracker 2");
 145
 146         mwindow->edl->local_session->set_selectionstart(position);
 147         mwindow->edl->local_session->set_selectionend(position);
 148
 149         updated_scroll = update_scroll(position);
 150
 151         mwindow->gui->mainclock->update(position);
 152         mwindow->gui->update_patchbay();
 153         mwindow->gui->update_timebar(0);
 154
 155         if(!updated_scroll)
 156         {
 157                 mwindow->gui->update_cursor();
 158                 // we just need to update clocks, not everything
 159                 mwindow->gui->zoombar->update_clocks();
 160
 161                 for(int i = 0; i < TOTAL_PANES; i++)
 162                         if(mwindow->gui->pane[i])
 163                                 mwindow->gui->pane[i]->canvas->flash(0);
 164         }
 165
 166         mwindow->gui->flush();
 167         mwindow->gui->unlock_window();
 168
 169 // Plugin GUI's hold lock on mwindow->gui here during user interface handlers.
 170         mwindow->update_plugin_guis();
 171
 172
 173         update_meters((int64_t)(position * mwindow->edl->session->sample_rate));
 174 }
 175
 176 void CTracking::draw()
 177 {
 178 }