cinelerra/ctracking.C

   1 #include "bcsignals.h"
   2 #include "cplayback.h"
   3 #include "ctimebar.h"
   4 #include "ctracking.h"
   5 #include "cwindow.h"
   6 #include "cwindowgui.h"
   7 #include "edl.h"
   8 #include "edlsession.h"
   9 #include "localsession.h"
  10 #include "mainclock.h"
  11 #include "maincursor.h"
  12 #include "mwindow.h"
  13 #include "mwindowgui.h"
  14 #include "patchbay.h"
  15 #include "trackcanvas.h"
  16 #include "transportque.h"
  17 #include "zoombar.h"
  18
  19 CTracking::CTracking(MWindow *mwindow, CWindow *cwindow)
  20  : Tracking(mwindow)
  21 {
  22         this->cwindow = cwindow;
  23 }
  24
  25 CTracking::~CTracking()
  26 {
  27 }
  28
  29 PlaybackEngine* CTracking::get_playback_engine()
  30 {
  31         return cwindow->playback_engine;
  32 }
  33
  34 int CTracking::start_playback(double new_position)
  35 {
  36         mwindow->gui->cursor->playing_back = 1;
  37
  38         Tracking::start_playback(new_position);
  39         return 0;
  40 }
  41
  42 int CTracking::stop_playback()
  43 {
  44         mwindow->gui->cursor->playing_back = 0;
  45
  46
  47         Tracking::stop_playback();
  48         return 0;
  49 }
  50
  51 #define SCROLL_THRESHOLD 0
  52
  53
  54 int CTracking::update_scroll(double position)
  55 {
  56         int updated_scroll = 0;
  57
  58         if(mwindow->edl->session->view_follows_playback)
  59         {
  60                 double seconds_per_pixel = (double)mwindow->edl->local_session->zoom_sample /
  61                         mwindow->edl->session->sample_rate;
  62                 double half_canvas = seconds_per_pixel *
  63                         mwindow->gui->canvas->get_w() / 2;
  64                 double midpoint = mwindow->edl->local_session->view_start *
  65                         seconds_per_pixel +
  66                         half_canvas;
  67
  68                 if(get_playback_engine()->command->get_direction() == PLAY_FORWARD)
  69                 {
  70                         double left_boundary = midpoint + SCROLL_THRESHOLD * half_canvas;
  71                         double right_boundary = midpoint + half_canvas;
  72
  73                         if(position > left_boundary &&
  74                                 position < right_boundary)
  75                         {
  76                                 int pixels = Units::to_int64((position - midpoint) *
  77                                         mwindow->edl->session->sample_rate /
  78                                         mwindow->edl->local_session->zoom_sample);
  79                                 if(pixels)
  80                                 {
  81                                         mwindow->move_right(pixels);
  82 //printf("CTracking::update_scroll 1 %d\n", pixels);
  83                                         updated_scroll = 1;
  84                                 }
  85                         }
  86                 }
  87                 else
  88                 {
  89                         double right_boundary = midpoint - SCROLL_THRESHOLD * half_canvas;
  90                         double left_boundary = midpoint - half_canvas;
  91
  92                         if(position < right_boundary &&
  93                                 position > left_boundary &&
  94                                 mwindow->edl->local_session->view_start > 0)
  95                         {
  96                                 int pixels = Units::to_int64((midpoint - position) *
  97                                                 mwindow->edl->session->sample_rate /
  98                                                 mwindow->edl->local_session->zoom_sample);
  99                                 if(pixels)
 100                                 {
 101                                         mwindow->move_left(pixels);
 102                                         updated_scroll = 1;
 103                                 }
 104                         }
 105                 }
 106         }
 107
 108         return updated_scroll;
 109 }
 110
 111 void CTracking::update_tracker(double position)
 112 {
 113         int updated_scroll = 0;
 114 // Update cwindow slider
 115         cwindow->gui->lock_window("CTracking::update_tracker 1");
 116         cwindow->gui->slider->update(position);
 117
 118 // This is going to boost the latency but we need to update the timebar
 119         cwindow->gui->timebar->draw_range();
 120         cwindow->gui->timebar->flash();
 121         cwindow->gui->unlock_window();
 122
 123 // Update mwindow cursor
 124         mwindow->gui->lock_window("CTracking::update_tracker 2");
 125
 126         mwindow->edl->local_session->set_selectionstart(position);
 127         mwindow->edl->local_session->set_selectionend(position);
 128
 129         updated_scroll = update_scroll(position);
 130
 131         mwindow->gui->mainclock->update(position);
 132         mwindow->gui->patchbay->update();
 133
 134         if(!updated_scroll)
 135         {
 136                 mwindow->gui->cursor->update();
 137                 mwindow->gui->zoombar->update();
 138
 139
 140                 mwindow->gui->canvas->flash();
 141                 mwindow->gui->flush();
 142         }
 143         mwindow->gui->unlock_window();
 144
 145 // Plugin GUI's hold lock on mwindow->gui here during user interface handlers.
 146         mwindow->update_plugin_guis();
 147
 148
 149         update_meters((int64_t)(position * mwindow->edl->session->sample_rate));
 150 }
 151
 152 void CTracking::draw()
 153 {
 154 }