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 "film_viewer.h"
38 #include "video_decoder.h"
44 using boost::shared_ptr;
46 FilmViewer::FilmViewer (shared_ptr<Film> f, wxWindow* p)
48 , _panel (new wxPanel (this))
49 , _slider (new wxSlider (this, wxID_ANY, 0, 0, 4096))
50 , _play_button (new wxToggleButton (this, wxID_ANY, wxT ("Play")))
56 _panel->SetDoubleBuffered (true);
57 _panel->SetBackgroundStyle (wxBG_STYLE_PAINT);
59 wxBoxSizer* v_sizer = new wxBoxSizer (wxVERTICAL);
62 v_sizer->Add (_panel, 1, wxEXPAND);
64 wxBoxSizer* h_sizer = new wxBoxSizer (wxHORIZONTAL);
65 h_sizer->Add (_play_button, 0, wxEXPAND);
66 h_sizer->Add (_slider, 1, wxEXPAND);
68 v_sizer->Add (h_sizer, 0, wxEXPAND);
70 _panel->Bind (wxEVT_PAINT, &FilmViewer::paint_panel, this);
71 _panel->Bind (wxEVT_SIZE, &FilmViewer::panel_sized, this);
72 _slider->Bind (wxEVT_SCROLL_THUMBTRACK, &FilmViewer::slider_moved, this);
73 _slider->Bind (wxEVT_SCROLL_PAGEUP, &FilmViewer::slider_moved, this);
74 _slider->Bind (wxEVT_SCROLL_PAGEDOWN, &FilmViewer::slider_moved, this);
75 _play_button->Bind (wxEVT_COMMAND_TOGGLEBUTTON_CLICKED, &FilmViewer::play_clicked, this);
76 _timer.Bind (wxEVT_TIMER, &FilmViewer::timer, this);
82 FilmViewer::film_changed (Film::Property p)
91 shared_ptr<DecodeOptions> o (new DecodeOptions);
92 o->decode_audio = false;
93 o->decode_subtitles = true;
94 o->video_sync = false;
95 _decoders = decoder_factory (_film, o, 0);
96 _decoders.video->Video.connect (bind (&FilmViewer::process_video, this, _1, _2));
97 _decoders.video->OutputChanged.connect (boost::bind (&FilmViewer::decoder_changed, this));
98 _decoders.video->set_subtitle_stream (_film->subtitle_stream());
104 case Film::WITH_SUBTITLES:
105 case Film::SUBTITLE_OFFSET:
106 case Film::SUBTITLE_SCALE:
109 case Film::SUBTITLE_STREAM:
110 _decoders.video->set_subtitle_stream (_film->subtitle_stream ());
118 FilmViewer::set_film (shared_ptr<Film> f)
130 _film->Changed.connect (boost::bind (&FilmViewer::film_changed, this, _1));
132 film_changed (Film::CONTENT);
133 film_changed (Film::CROP);
134 film_changed (Film::FORMAT);
135 film_changed (Film::WITH_SUBTITLES);
136 film_changed (Film::SUBTITLE_OFFSET);
137 film_changed (Film::SUBTITLE_SCALE);
138 film_changed (Film::SUBTITLE_STREAM);
142 FilmViewer::decoder_changed ()
144 seek_and_update (_decoders.video->last_source_frame ());
148 FilmViewer::timer (wxTimerEvent& ev)
159 if (_film->length()) {
160 int const new_slider_position = 4096 * _decoders.video->last_source_frame() / _film->length().get();
161 if (new_slider_position != _slider->GetValue()) {
162 _slider->SetValue (new_slider_position);
169 FilmViewer::paint_panel (wxPaintEvent& ev)
171 wxPaintDC dc (_panel);
173 if (!_display_frame || !_film) {
177 wxImage frame (_out_width, _out_height, _display_frame->data()[0], true);
178 wxBitmap frame_bitmap (frame);
179 dc.DrawBitmap (frame_bitmap, 0, 0);
181 if (_film->with_subtitles() && _display_sub) {
182 wxImage sub (_display_sub->size().width, _display_sub->size().height, _display_sub->data()[0], _display_sub->alpha(), true);
183 wxBitmap sub_bitmap (sub);
184 dc.DrawBitmap (sub_bitmap, _display_sub_position.x, _display_sub_position.y);
190 FilmViewer::slider_moved (wxCommandEvent& ev)
196 if (_film->length()) {
197 seek_and_update (_slider->GetValue() * _film->length().get() / 4096);
202 FilmViewer::seek_and_update (SourceFrame f)
204 if (_decoders.video->seek (f)) {
214 FilmViewer::panel_sized (wxSizeEvent& ev)
216 _panel_width = ev.GetSize().GetWidth();
217 _panel_height = ev.GetSize().GetHeight();
223 FilmViewer::update_from_raw ()
236 FilmViewer::raw_to_display ()
238 if (!_out_width || !_out_height || !_film) {
242 /* Get a compacted image as we have to feed it to wxWidgets */
243 _display_frame = _raw_frame->scale_and_convert_to_rgb (Size (_out_width, _out_height), 0, _film->scaler(), false);
246 Rect tx = subtitle_transformed_area (
247 float (_out_width) / _film->size().width,
248 float (_out_height) / _film->size().height,
249 _raw_sub->area(), _film->subtitle_offset(), _film->subtitle_scale()
252 _display_sub.reset (new RGBPlusAlphaImage (_raw_sub->image()->scale (tx.size(), _film->scaler(), false)));
253 _display_sub_position = tx.position();
255 _display_sub.reset ();
260 FilmViewer::calculate_sizes ()
266 float const panel_ratio = static_cast<float> (_panel_width) / _panel_height;
267 float const film_ratio = _film->format() ? _film->format()->ratio_as_float(_film) : 1.78;
268 if (panel_ratio < film_ratio) {
269 /* panel is less widscreen than the film; clamp width */
270 _out_width = _panel_width;
271 _out_height = _out_width / film_ratio;
273 /* panel is more widescreen than the film; clamp heignt */
274 _out_height = _panel_height;
275 _out_width = _out_height * film_ratio;
280 FilmViewer::play_clicked (wxCommandEvent &)
286 FilmViewer::check_play_state ()
292 if (_play_button->GetValue()) {
293 _timer.Start (1000 / _film->frames_per_second());
300 FilmViewer::process_video (shared_ptr<Image> image, shared_ptr<Subtitle> sub)
309 FilmViewer::get_frame ()
312 shared_ptr<Image> last = _display_frame;
313 while (last == _display_frame) {
314 if (_decoders.video->pass ()) {
318 } catch (DecodeError& e) {
319 error_dialog (this, String::compose ("Could not decode video for view (%1)", e.what()));