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/format.h"
30 #include "lib/job_manager.h"
31 #include "lib/options.h"
32 #include "lib/subtitle.h"
33 #include "lib/image.h"
34 #include "lib/scaler.h"
35 #include "lib/exceptions.h"
36 #include "lib/examine_content_job.h"
37 #include "film_viewer.h"
39 #include "video_decoder.h"
46 using boost::shared_ptr;
48 FilmViewer::FilmViewer (shared_ptr<Film> f, wxWindow* p)
50 , _panel (new wxPanel (this))
51 , _slider (new wxSlider (this, wxID_ANY, 0, 0, 4096))
52 , _play_button (new wxToggleButton (this, wxID_ANY, wxT ("Play")))
58 _panel->SetDoubleBuffered (true);
59 _panel->SetBackgroundStyle (wxBG_STYLE_PAINT);
61 wxBoxSizer* v_sizer = new wxBoxSizer (wxVERTICAL);
64 v_sizer->Add (_panel, 1, wxEXPAND);
66 wxBoxSizer* h_sizer = new wxBoxSizer (wxHORIZONTAL);
67 h_sizer->Add (_play_button, 0, wxEXPAND);
68 h_sizer->Add (_slider, 1, wxEXPAND);
70 v_sizer->Add (h_sizer, 0, wxEXPAND);
72 _panel->Bind (wxEVT_PAINT, &FilmViewer::paint_panel, this);
73 _panel->Bind (wxEVT_SIZE, &FilmViewer::panel_sized, this);
74 _slider->Bind (wxEVT_SCROLL_THUMBTRACK, &FilmViewer::slider_moved, this);
75 _slider->Bind (wxEVT_SCROLL_PAGEUP, &FilmViewer::slider_moved, this);
76 _slider->Bind (wxEVT_SCROLL_PAGEDOWN, &FilmViewer::slider_moved, this);
77 _play_button->Bind (wxEVT_COMMAND_TOGGLEBUTTON_CLICKED, &FilmViewer::play_clicked, this);
78 _timer.Bind (wxEVT_TIMER, &FilmViewer::timer, this);
82 JobManager::instance()->ActiveJobsChanged.connect (
83 bind (&FilmViewer::active_jobs_changed, this, _1)
88 FilmViewer::film_changed (Film::Property p)
97 shared_ptr<DecodeOptions> o (new DecodeOptions);
98 o->decode_audio = false;
99 o->decode_subtitles = true;
100 o->video_sync = false;
101 _decoders = decoder_factory (_film, o, 0);
102 _decoders.video->Video.connect (bind (&FilmViewer::process_video, this, _1, _2));
103 _decoders.video->OutputChanged.connect (boost::bind (&FilmViewer::decoder_changed, this));
104 _decoders.video->set_subtitle_stream (_film->subtitle_stream());
108 _slider->Show (_film->content_type() == VIDEO);
109 _play_button->Show (_film->content_type() == VIDEO);
112 case Film::WITH_SUBTITLES:
113 case Film::SUBTITLE_OFFSET:
114 case Film::SUBTITLE_SCALE:
118 case Film::SUBTITLE_STREAM:
119 _decoders.video->set_subtitle_stream (_film->subtitle_stream ());
127 FilmViewer::set_film (shared_ptr<Film> f)
139 _film->Changed.connect (boost::bind (&FilmViewer::film_changed, this, _1));
141 film_changed (Film::CONTENT);
142 film_changed (Film::CROP);
143 film_changed (Film::FORMAT);
144 film_changed (Film::WITH_SUBTITLES);
145 film_changed (Film::SUBTITLE_OFFSET);
146 film_changed (Film::SUBTITLE_SCALE);
147 film_changed (Film::SUBTITLE_STREAM);
151 FilmViewer::decoder_changed ()
153 if (_decoders.video->seek_to_last ()) {
163 FilmViewer::timer (wxTimerEvent& ev)
174 if (_film->length()) {
175 int const new_slider_position = 4096 * _decoders.video->last_source_time() / (_film->length().get() * _film->frames_per_second());
176 if (new_slider_position != _slider->GetValue()) {
177 _slider->SetValue (new_slider_position);
184 FilmViewer::paint_panel (wxPaintEvent& ev)
186 wxPaintDC dc (_panel);
188 if (!_display_frame || !_film) {
193 wxImage frame (_out_width, _out_height, _display_frame->data()[0], true);
194 wxBitmap frame_bitmap (frame);
195 dc.DrawBitmap (frame_bitmap, 0, 0);
197 if (_film->with_subtitles() && _display_sub) {
198 wxImage sub (_display_sub->size().width, _display_sub->size().height, _display_sub->data()[0], _display_sub->alpha(), true);
199 wxBitmap sub_bitmap (sub);
200 dc.DrawBitmap (sub_bitmap, _display_sub_position.x, _display_sub_position.y);
206 FilmViewer::slider_moved (wxCommandEvent& ev)
208 if (!_film || !_film->length()) {
212 if (_decoders.video->seek (_slider->GetValue() * _film->length().get() / (4096 * _film->frames_per_second()))) {
222 FilmViewer::panel_sized (wxSizeEvent& ev)
224 _panel_width = ev.GetSize().GetWidth();
225 _panel_height = ev.GetSize().GetHeight();
231 FilmViewer::update_from_raw ()
244 FilmViewer::raw_to_display ()
246 if (!_raw_frame || !_out_width || !_out_height || !_film) {
250 /* Get a compacted image as we have to feed it to wxWidgets */
251 _display_frame = _raw_frame->scale_and_convert_to_rgb (Size (_out_width, _out_height), 0, _film->scaler(), false);
254 Rect tx = subtitle_transformed_area (
255 float (_out_width) / _film->size().width,
256 float (_out_height) / _film->size().height,
257 _raw_sub->area(), _film->subtitle_offset(), _film->subtitle_scale()
260 _display_sub.reset (new RGBPlusAlphaImage (_raw_sub->image()->scale (tx.size(), _film->scaler(), false)));
261 _display_sub_position = tx.position();
263 _display_sub.reset ();
268 FilmViewer::calculate_sizes ()
274 float const panel_ratio = static_cast<float> (_panel_width) / _panel_height;
275 float const film_ratio = _film->format() ? _film->format()->ratio_as_float(_film) : 1.78;
276 if (panel_ratio < film_ratio) {
277 /* panel is less widscreen than the film; clamp width */
278 _out_width = _panel_width;
279 _out_height = _out_width / film_ratio;
281 /* panel is more widescreen than the film; clamp heignt */
282 _out_height = _panel_height;
283 _out_width = _out_height * film_ratio;
288 FilmViewer::play_clicked (wxCommandEvent &)
294 FilmViewer::check_play_state ()
300 if (_play_button->GetValue()) {
301 _timer.Start (1000 / _film->frames_per_second());
308 FilmViewer::process_video (shared_ptr<Image> image, shared_ptr<Subtitle> sub)
317 FilmViewer::get_frame ()
319 /* Clear our raw frame in case we don't get a new one */
323 shared_ptr<Image> last = _display_frame;
324 while (last == _display_frame) {
325 if (_decoders.video->pass ()) {
326 /* We didn't get a frame before the decoder gave up,
327 so clear our display frame.
329 _display_frame.reset ();
333 } catch (DecodeError& e) {
334 error_dialog (this, String::compose ("Could not decode video for view (%1)", e.what()));
339 FilmViewer::active_jobs_changed (bool a)
342 list<shared_ptr<Job> > jobs = JobManager::instance()->get ();
343 list<shared_ptr<Job> >::iterator i = jobs.begin ();
344 while (i != jobs.end() && boost::dynamic_pointer_cast<ExamineContentJob> (*i) == 0) {
348 if (i == jobs.end() || (*i)->finished()) {
349 /* no examine content job running, so we're ok to use the viewer */
354 _slider->Enable (!a);
355 _play_button->Enable (!a);