2 Copyright (C) 2012 Carl Hetherington <cth@carlh.net>
4 This program is free software; you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; either version 2 of the License, or
7 (at your option) any later version.
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
14 You should have received a copy of the GNU General Public License
15 along with this program; if not, write to the Free Software
16 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
20 /** @file src/film_viewer.cc
21 * @brief A wx widget to view a preview of a Film.
26 #include <wx/tglbtn.h>
28 #include "lib/ratio.h"
30 #include "lib/job_manager.h"
31 #include "lib/image.h"
32 #include "lib/scaler.h"
33 #include "lib/exceptions.h"
34 #include "lib/examine_content_job.h"
35 #include "lib/filter.h"
36 #include "lib/player.h"
37 #include "lib/video_content.h"
38 #include "lib/video_decoder.h"
39 #include "film_viewer.h"
49 using boost::shared_ptr;
50 using boost::dynamic_pointer_cast;
51 using boost::weak_ptr;
54 FilmViewer::FilmViewer (shared_ptr<Film> f, wxWindow* p)
56 , _panel (new wxPanel (this))
57 , _slider (new wxSlider (this, wxID_ANY, 0, 0, 4096))
58 , _back_button (new wxButton (this, wxID_ANY, wxT("<")))
59 , _forward_button (new wxButton (this, wxID_ANY, wxT(">")))
60 , _frame_number (new wxStaticText (this, wxID_ANY, wxT("")))
61 , _timecode (new wxStaticText (this, wxID_ANY, wxT("")))
62 , _play_button (new wxToggleButton (this, wxID_ANY, _("Play")))
66 _panel->SetDoubleBuffered (true);
69 _panel->SetBackgroundStyle (wxBG_STYLE_PAINT);
71 _v_sizer = new wxBoxSizer (wxVERTICAL);
74 _v_sizer->Add (_panel, 1, wxEXPAND);
76 wxBoxSizer* h_sizer = new wxBoxSizer (wxHORIZONTAL);
78 wxBoxSizer* time_sizer = new wxBoxSizer (wxVERTICAL);
79 time_sizer->Add (_frame_number, 0, wxEXPAND);
80 time_sizer->Add (_timecode, 0, wxEXPAND);
82 h_sizer->Add (_back_button, 0, wxALL, 2);
83 h_sizer->Add (time_sizer, 0, wxEXPAND);
84 h_sizer->Add (_forward_button, 0, wxALL, 2);
85 h_sizer->Add (_play_button, 0, wxEXPAND);
86 h_sizer->Add (_slider, 1, wxEXPAND);
88 _v_sizer->Add (h_sizer, 0, wxEXPAND | wxALL, 6);
90 _frame_number->SetMinSize (wxSize (84, -1));
91 _back_button->SetMinSize (wxSize (32, -1));
92 _forward_button->SetMinSize (wxSize (32, -1));
94 _panel->Bind (wxEVT_PAINT, boost::bind (&FilmViewer::paint_panel, this));
95 _panel->Bind (wxEVT_SIZE, boost::bind (&FilmViewer::panel_sized, this, _1));
96 _slider->Bind (wxEVT_SCROLL_THUMBTRACK, boost::bind (&FilmViewer::slider_moved, this));
97 _slider->Bind (wxEVT_SCROLL_PAGEUP, boost::bind (&FilmViewer::slider_moved, this));
98 _slider->Bind (wxEVT_SCROLL_PAGEDOWN, boost::bind (&FilmViewer::slider_moved, this));
99 _play_button->Bind (wxEVT_COMMAND_TOGGLEBUTTON_CLICKED, boost::bind (&FilmViewer::play_clicked, this));
100 _timer.Bind (wxEVT_TIMER, boost::bind (&FilmViewer::timer, this));
101 _back_button->Bind (wxEVT_COMMAND_BUTTON_CLICKED, boost::bind (&FilmViewer::back_clicked, this));
102 _forward_button->Bind (wxEVT_COMMAND_BUTTON_CLICKED, boost::bind (&FilmViewer::forward_clicked, this));
106 JobManager::instance()->ActiveJobsChanged.connect (
107 bind (&FilmViewer::active_jobs_changed, this, _1)
112 FilmViewer::set_film (shared_ptr<Film> f)
122 _slider->SetValue (0);
123 set_position_text (0);
129 _player = f->make_player ();
130 _player->disable_audio ();
131 _player->Video.connect (boost::bind (&FilmViewer::process_video, this, _1, _2, _5));
132 _player->Changed.connect (boost::bind (&FilmViewer::player_changed, this, _1));
139 FilmViewer::fetch_current_frame_again ()
145 /* We could do this with a seek and a fetch_next_frame, but this is
146 a shortcut to make it quicker.
150 if (!_player->repeat_last_video ()) {
167 Time const len = _film->length ();
170 int const new_slider_position = 4096 * _player->video_position() / len;
171 if (new_slider_position != _slider->GetValue()) {
172 _slider->SetValue (new_slider_position);
179 FilmViewer::paint_panel ()
181 wxPaintDC dc (_panel);
183 if (!_frame || !_film || !_out_size.width || !_out_size.height) {
188 shared_ptr<Image> packed_frame (new Image (_frame, false));
190 wxImage frame (_out_size.width, _out_size.height, packed_frame->data()[0], true);
191 wxBitmap frame_bitmap (frame);
192 dc.DrawBitmap (frame_bitmap, 0, 0);
194 if (_out_size.width < _panel_size.width) {
195 wxPen p (GetBackgroundColour ());
196 wxBrush b (GetBackgroundColour ());
199 dc.DrawRectangle (_out_size.width, 0, _panel_size.width - _out_size.width, _panel_size.height);
202 if (_out_size.height < _panel_size.height) {
203 wxPen p (GetBackgroundColour ());
204 wxBrush b (GetBackgroundColour ());
207 dc.DrawRectangle (0, _out_size.height, _panel_size.width, _panel_size.height - _out_size.height);
213 FilmViewer::slider_moved ()
215 if (_film && _player) {
216 _player->seek (_slider->GetValue() * _film->length() / 4096, false);
222 FilmViewer::panel_sized (wxSizeEvent& ev)
224 _panel_size.width = ev.GetSize().GetWidth();
225 _panel_size.height = ev.GetSize().GetHeight();
227 fetch_current_frame_again ();
231 FilmViewer::calculate_sizes ()
233 if (!_film || !_player) {
237 Ratio const * container = _film->container ();
239 float const panel_ratio = _panel_size.ratio ();
240 float const film_ratio = container ? container->ratio () : 1.78;
242 if (panel_ratio < film_ratio) {
243 /* panel is less widscreen than the film; clamp width */
244 _out_size.width = _panel_size.width;
245 _out_size.height = _out_size.width / film_ratio;
247 /* panel is more widescreen than the film; clamp height */
248 _out_size.height = _panel_size.height;
249 _out_size.width = _out_size.height * film_ratio;
252 /* Catch silly values */
253 _out_size.width = max (64, _out_size.width);
254 _out_size.height = max (64, _out_size.height);
256 _player->set_video_container_size (_out_size);
260 FilmViewer::play_clicked ()
266 FilmViewer::check_play_state ()
268 if (!_film || _film->video_frame_rate() == 0) {
272 if (_play_button->GetValue()) {
273 _timer.Start (1000 / _film->video_frame_rate());
280 FilmViewer::process_video (shared_ptr<const Image> image, Eyes eyes, Time t)
282 if (eyes == EYES_RIGHT) {
289 set_position_text (t);
293 FilmViewer::set_position_text (Time t)
296 _frame_number->SetLabel ("0");
297 _timecode->SetLabel ("0:0:0.0");
301 double const fps = _film->video_frame_rate ();
302 /* Count frame number from 1 ... not sure if this is the best idea */
303 _frame_number->SetLabel (wxString::Format (wxT("%d"), int (rint (t * fps / TIME_HZ)) + 1));
305 double w = static_cast<double>(t) / TIME_HZ;
306 int const h = (w / 3600);
308 int const m = (w / 60);
310 int const s = floor (w);
312 int const f = rint (w * fps);
313 _timecode->SetLabel (wxString::Format (wxT("%02d:%02d:%02d.%02d"), h, m, s, f));
316 /** Ask the player to emit its next frame, then update our display */
318 FilmViewer::fetch_next_frame ()
320 /* Clear our frame in case we don't get a new one */
330 while (!_got_frame && !_player->pass ()) {}
331 } catch (DecodeError& e) {
332 _play_button->SetValue (false);
334 error_dialog (this, wxString::Format (_("Could not decode video for view (%s)"), std_to_wx(e.what()).data()));
335 } catch (OpenFileError& e) {
336 /* There was a problem opening a content file; we'll let this slide as it
337 probably means a missing content file, which we're already taking care of.
346 FilmViewer::active_jobs_changed (bool a)
349 list<shared_ptr<Job> > jobs = JobManager::instance()->get ();
350 list<shared_ptr<Job> >::iterator i = jobs.begin ();
351 while (i != jobs.end() && boost::dynamic_pointer_cast<ExamineContentJob> (*i) == 0) {
355 if (i == jobs.end() || (*i)->finished()) {
356 /* no examine content job running, so we're ok to use the viewer */
361 _slider->Enable (!a);
362 _play_button->Enable (!a);
366 FilmViewer::back_clicked ()
372 /* Player::video_position is the time after the last frame that we received.
373 We want to see the one before it, so we need to go back 2.
376 Time p = _player->video_position() - _film->video_frames_to_time (2);
381 _player->seek (p, true);
386 FilmViewer::forward_clicked ()
396 FilmViewer::player_changed (bool frequent)
403 fetch_current_frame_again ();