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/imagemagick_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->Connect (wxID_ANY, wxEVT_PAINT, wxPaintEventHandler (FilmViewer::paint_panel), 0, this);
97 _panel->Connect (wxID_ANY, wxEVT_SIZE, wxSizeEventHandler (FilmViewer::panel_sized), 0, this);
98 _slider->Connect (wxID_ANY, wxEVT_SCROLL_THUMBTRACK, wxScrollEventHandler (FilmViewer::slider_moved), 0, this);
99 _slider->Connect (wxID_ANY, wxEVT_SCROLL_PAGEUP, wxScrollEventHandler (FilmViewer::slider_moved), 0, this);
100 _slider->Connect (wxID_ANY, wxEVT_SCROLL_PAGEDOWN, wxScrollEventHandler (FilmViewer::slider_moved), 0, this);
101 _play_button->Connect (wxID_ANY, wxEVT_COMMAND_TOGGLEBUTTON_CLICKED, wxCommandEventHandler (FilmViewer::play_clicked), 0, this);
102 _timer.Connect (wxID_ANY, wxEVT_TIMER, wxTimerEventHandler (FilmViewer::timer), 0, this);
103 _back_button->Connect (wxID_ANY, wxEVT_COMMAND_BUTTON_CLICKED, wxCommandEventHandler (FilmViewer::back_clicked), 0, this);
104 _forward_button->Connect (wxID_ANY, wxEVT_COMMAND_BUTTON_CLICKED, wxCommandEventHandler (FilmViewer::forward_clicked), 0, this);
108 JobManager::instance()->ActiveJobsChanged.connect (
109 bind (&FilmViewer::active_jobs_changed, this, _1)
114 FilmViewer::set_film (shared_ptr<Film> f)
129 _player = f->make_player ();
130 _player->disable_audio ();
131 _player->Video.connect (boost::bind (&FilmViewer::process_video, this, _1, _3));
132 _player->Changed.connect (boost::bind (&FilmViewer::player_changed, this, _1));
135 fetch_current_frame_again ();
139 FilmViewer::fetch_current_frame_again ()
145 /* Player::video_position is the time after the last frame that we received.
146 We want to see it again, so seek back one frame.
149 Time p = _player->video_position() - _film->video_frames_to_time (1);
154 _player->seek (p, true);
159 FilmViewer::timer (wxTimerEvent &)
167 Time const len = _film->length_with_loop ();
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 (wxPaintEvent &)
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 (wxScrollEvent &)
215 if (_film && _player) {
216 _player->seek (_slider->GetValue() * _film->length_with_loop() / 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 = static_cast<float> (_panel_size.width) / _panel_size.height;
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 (wxCommandEvent &)
266 FilmViewer::check_play_state ()
268 if (!_film || _film->dcp_video_frame_rate() == 0) {
272 if (_play_button->GetValue()) {
273 _timer.Start (1000 / _film->dcp_video_frame_rate());
280 FilmViewer::process_video (shared_ptr<const Image> image, Time t)
283 /* This is an additional frame emitted by a single pass. Store it. */
284 _queue.push_front (make_pair (image, t));
291 double const fps = _film->dcp_video_frame_rate ();
292 /* Count frame number from 1 ... not sure if this is the best idea */
293 _frame_number->SetLabel (wxString::Format (wxT("%d"), int (rint (t * fps / TIME_HZ)) + 1));
295 double w = static_cast<double>(t) / TIME_HZ;
296 int const h = (w / 3600);
298 int const m = (w / 60);
300 int const s = floor (w);
302 int const f = rint (w * fps);
303 _timecode->SetLabel (wxString::Format (wxT("%02d:%02d:%02d:%02d"), h, m, s, f));
306 /** Ask the player to emit its next frame, then update our display */
308 FilmViewer::fetch_next_frame ()
310 /* Clear our frame in case we don't get a new one */
319 if (!_queue.empty ()) {
320 process_video (_queue.back().first, _queue.back().second);
324 while (!_got_frame && !_player->pass ()) {}
325 } catch (DecodeError& e) {
326 _play_button->SetValue (false);
328 error_dialog (this, wxString::Format (_("Could not decode video for view (%s)"), std_to_wx(e.what()).data()));
337 FilmViewer::active_jobs_changed (bool a)
340 list<shared_ptr<Job> > jobs = JobManager::instance()->get ();
341 list<shared_ptr<Job> >::iterator i = jobs.begin ();
342 while (i != jobs.end() && boost::dynamic_pointer_cast<ExamineContentJob> (*i) == 0) {
346 if (i == jobs.end() || (*i)->finished()) {
347 /* no examine content job running, so we're ok to use the viewer */
352 _slider->Enable (!a);
353 _play_button->Enable (!a);
357 FilmViewer::back_clicked (wxCommandEvent &)
363 /* Player::video_position is the time after the last frame that we received.
364 We want to see the one before it, so we need to go back 2.
367 _player->seek (_player->video_position() - _film->video_frames_to_time(2), true);
372 FilmViewer::forward_clicked (wxCommandEvent &)
382 FilmViewer::player_changed (bool frequent)
389 fetch_current_frame_again ();