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/ffmpeg_content.h"
39 #include "lib/still_image_content.h"
40 #include "lib/video_decoder.h"
41 #include "film_viewer.h"
51 using boost::shared_ptr;
52 using boost::dynamic_pointer_cast;
53 using boost::weak_ptr;
56 FilmViewer::FilmViewer (shared_ptr<Film> f, wxWindow* p)
58 , _panel (new wxPanel (this))
59 , _slider (new wxSlider (this, wxID_ANY, 0, 0, 4096))
60 , _back_button (new wxButton (this, wxID_ANY, wxT("<")))
61 , _forward_button (new wxButton (this, wxID_ANY, wxT(">")))
62 , _frame_number (new wxStaticText (this, wxID_ANY, wxT("")))
63 , _timecode (new wxStaticText (this, wxID_ANY, wxT("")))
64 , _play_button (new wxToggleButton (this, wxID_ANY, _("Play")))
68 _panel->SetDoubleBuffered (true);
71 _panel->SetBackgroundStyle (wxBG_STYLE_PAINT);
73 _v_sizer = new wxBoxSizer (wxVERTICAL);
76 _v_sizer->Add (_panel, 1, wxEXPAND);
78 wxBoxSizer* h_sizer = new wxBoxSizer (wxHORIZONTAL);
80 wxBoxSizer* time_sizer = new wxBoxSizer (wxVERTICAL);
81 time_sizer->Add (_frame_number, 0, wxEXPAND);
82 time_sizer->Add (_timecode, 0, wxEXPAND);
84 h_sizer->Add (_back_button, 0, wxALL, 2);
85 h_sizer->Add (time_sizer, 0, wxEXPAND);
86 h_sizer->Add (_forward_button, 0, wxALL, 2);
87 h_sizer->Add (_play_button, 0, wxEXPAND);
88 h_sizer->Add (_slider, 1, wxEXPAND);
90 _v_sizer->Add (h_sizer, 0, wxEXPAND | wxALL, 6);
92 _frame_number->SetMinSize (wxSize (84, -1));
93 _back_button->SetMinSize (wxSize (32, -1));
94 _forward_button->SetMinSize (wxSize (32, -1));
96 _panel->Bind (wxEVT_PAINT, boost::bind (&FilmViewer::paint_panel, this));
97 _panel->Bind (wxEVT_SIZE, boost::bind (&FilmViewer::panel_sized, this, _1));
98 _slider->Bind (wxEVT_SCROLL_THUMBTRACK, boost::bind (&FilmViewer::slider_moved, this));
99 _slider->Bind (wxEVT_SCROLL_PAGEUP, boost::bind (&FilmViewer::slider_moved, this));
100 _slider->Bind (wxEVT_SCROLL_PAGEDOWN, boost::bind (&FilmViewer::slider_moved, this));
101 _play_button->Bind (wxEVT_COMMAND_TOGGLEBUTTON_CLICKED, boost::bind (&FilmViewer::play_clicked, this));
102 _timer.Bind (wxEVT_TIMER, boost::bind (&FilmViewer::timer, this));
103 _back_button->Bind (wxEVT_COMMAND_BUTTON_CLICKED, boost::bind (&FilmViewer::back_clicked, this));
104 _forward_button->Bind (wxEVT_COMMAND_BUTTON_CLICKED, boost::bind (&FilmViewer::forward_clicked, this));
108 JobManager::instance()->ActiveJobsChanged.connect (
109 bind (&FilmViewer::active_jobs_changed, this, _1)
114 FilmViewer::set_film (shared_ptr<Film> f)
124 _slider->SetValue (0);
125 set_position_text (0);
131 _player = f->make_player ();
132 _player->disable_audio ();
133 _player->Video.connect (boost::bind (&FilmViewer::process_video, this, _1, _2, _5));
134 _player->Changed.connect (boost::bind (&FilmViewer::player_changed, this, _1));
141 FilmViewer::fetch_current_frame_again ()
147 /* We could do this with a seek and a fetch_next_frame, but this is
148 a shortcut to make it quicker.
152 if (!_player->repeat_last_video ()) {
169 Time const len = _film->length ();
172 int const new_slider_position = 4096 * _player->video_position() / len;
173 if (new_slider_position != _slider->GetValue()) {
174 _slider->SetValue (new_slider_position);
181 FilmViewer::paint_panel ()
183 wxPaintDC dc (_panel);
185 if (!_frame || !_film || !_out_size.width || !_out_size.height) {
190 shared_ptr<Image> packed_frame (new Image (_frame, false));
192 wxImage frame (_out_size.width, _out_size.height, packed_frame->data()[0], true);
193 wxBitmap frame_bitmap (frame);
194 dc.DrawBitmap (frame_bitmap, 0, 0);
196 if (_out_size.width < _panel_size.width) {
197 wxPen p (GetBackgroundColour ());
198 wxBrush b (GetBackgroundColour ());
201 dc.DrawRectangle (_out_size.width, 0, _panel_size.width - _out_size.width, _panel_size.height);
204 if (_out_size.height < _panel_size.height) {
205 wxPen p (GetBackgroundColour ());
206 wxBrush b (GetBackgroundColour ());
209 dc.DrawRectangle (0, _out_size.height, _panel_size.width, _panel_size.height - _out_size.height);
215 FilmViewer::slider_moved ()
217 if (_film && _player) {
218 _player->seek (_slider->GetValue() * _film->length() / 4096, false);
224 FilmViewer::panel_sized (wxSizeEvent& ev)
226 _panel_size.width = ev.GetSize().GetWidth();
227 _panel_size.height = ev.GetSize().GetHeight();
229 fetch_current_frame_again ();
233 FilmViewer::calculate_sizes ()
235 if (!_film || !_player) {
239 Ratio const * container = _film->container ();
241 float const panel_ratio = _panel_size.ratio ();
242 float const film_ratio = container ? container->ratio () : 1.78;
244 if (panel_ratio < film_ratio) {
245 /* panel is less widscreen than the film; clamp width */
246 _out_size.width = _panel_size.width;
247 _out_size.height = _out_size.width / film_ratio;
249 /* panel is more widescreen than the film; clamp height */
250 _out_size.height = _panel_size.height;
251 _out_size.width = _out_size.height * film_ratio;
254 /* Catch silly values */
255 _out_size.width = max (64, _out_size.width);
256 _out_size.height = max (64, _out_size.height);
258 _player->set_video_container_size (_out_size);
262 FilmViewer::play_clicked ()
268 FilmViewer::check_play_state ()
270 if (!_film || _film->video_frame_rate() == 0) {
274 if (_play_button->GetValue()) {
275 _timer.Start (1000 / _film->video_frame_rate());
282 FilmViewer::process_video (shared_ptr<const Image> image, Eyes eyes, Time t)
284 if (eyes == EYES_RIGHT) {
291 set_position_text (t);
295 FilmViewer::set_position_text (Time t)
298 _frame_number->SetLabel ("0");
299 _timecode->SetLabel ("0:0:0.0");
303 double const fps = _film->video_frame_rate ();
304 /* Count frame number from 1 ... not sure if this is the best idea */
305 _frame_number->SetLabel (wxString::Format (wxT("%d"), int (rint (t * fps / TIME_HZ)) + 1));
307 double w = static_cast<double>(t) / TIME_HZ;
308 int const h = (w / 3600);
310 int const m = (w / 60);
312 int const s = floor (w);
314 int const f = rint (w * fps);
315 _timecode->SetLabel (wxString::Format (wxT("%02d:%02d:%02d.%02d"), h, m, s, f));
318 /** Ask the player to emit its next frame, then update our display */
320 FilmViewer::fetch_next_frame ()
322 /* Clear our frame in case we don't get a new one */
332 while (!_got_frame && !_player->pass ()) {}
333 } catch (DecodeError& e) {
334 _play_button->SetValue (false);
336 error_dialog (this, wxString::Format (_("Could not decode video for view (%s)"), std_to_wx(e.what()).data()));
344 FilmViewer::active_jobs_changed (bool a)
347 list<shared_ptr<Job> > jobs = JobManager::instance()->get ();
348 list<shared_ptr<Job> >::iterator i = jobs.begin ();
349 while (i != jobs.end() && boost::dynamic_pointer_cast<ExamineContentJob> (*i) == 0) {
353 if (i == jobs.end() || (*i)->finished()) {
354 /* no examine content job running, so we're ok to use the viewer */
359 _slider->Enable (!a);
360 _play_button->Enable (!a);
364 FilmViewer::back_clicked ()
370 /* Player::video_position is the time after the last frame that we received.
371 We want to see the one before it, so we need to go back 2.
374 Time p = _player->video_position() - _film->video_frames_to_time (2);
379 _player->seek (p, true);
384 FilmViewer::forward_clicked ()
394 FilmViewer::player_changed (bool frequent)
401 fetch_current_frame_again ();