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 "film_viewer.h"
37 #include "video_decoder.h"
43 using boost::shared_ptr;
45 FilmViewer::FilmViewer (shared_ptr<Film> f, wxWindow* p)
47 , _panel (new wxPanel (this))
48 , _slider (new wxSlider (this, wxID_ANY, 0, 0, 4096))
49 , _play_button (new wxToggleButton (this, wxID_ANY, wxT ("Play")))
55 wxBoxSizer* v_sizer = new wxBoxSizer (wxVERTICAL);
58 v_sizer->Add (_panel, 1, wxEXPAND);
60 wxBoxSizer* h_sizer = new wxBoxSizer (wxHORIZONTAL);
61 h_sizer->Add (_play_button, 0, wxEXPAND);
62 h_sizer->Add (_slider, 1, wxEXPAND);
64 v_sizer->Add (h_sizer, 0, wxEXPAND);
66 _panel->Bind (wxEVT_PAINT, &FilmViewer::paint_panel, this);
67 _panel->Bind (wxEVT_SIZE, &FilmViewer::panel_sized, this);
68 _slider->Bind (wxEVT_SCROLL_THUMBTRACK, &FilmViewer::slider_moved, this);
69 _slider->Bind (wxEVT_SCROLL_PAGEUP, &FilmViewer::slider_moved, this);
70 _slider->Bind (wxEVT_SCROLL_PAGEDOWN, &FilmViewer::slider_moved, this);
71 _play_button->Bind (wxEVT_COMMAND_TOGGLEBUTTON_CLICKED, &FilmViewer::play_clicked, this);
72 _timer.Bind (wxEVT_TIMER, &FilmViewer::timer, this);
78 FilmViewer::film_changed (Film::Property p)
95 FilmViewer::set_film (shared_ptr<Film> f)
107 shared_ptr<DecodeOptions> o (new DecodeOptions);
108 o->decode_audio = false;
109 o->video_sync = false;
110 _decoders = decoder_factory (_film, o, 0);
111 _decoders.video->Video.connect (bind (&FilmViewer::process_video, this, _1, _2));
113 film_changed (Film::CROP);
114 film_changed (Film::FORMAT);
118 FilmViewer::timer (wxTimerEvent& ev)
123 shared_ptr<Image> last = _display;
124 while (last == _display) {
125 _decoders.video->pass ();
129 if (_last_frame_in_seconds) {
130 double const video_length_in_seconds = static_cast<double>(_format_context->duration) / AV_TIME_BASE;
131 int const new_slider_position = 4096 * _last_frame_in_seconds / video_length_in_seconds;
132 if (new_slider_position != _slider->GetValue()) {
133 _slider->SetValue (new_slider_position);
141 FilmViewer::paint_panel (wxPaintEvent& ev)
143 wxPaintDC dc (_panel);
148 wxImage i (_out_width, _out_height, _display->data()[0], true);
150 dc.DrawBitmap (b, 0, 0);
155 FilmViewer::slider_moved (wxCommandEvent& ev)
157 if (_decoders.video->seek (_slider->GetValue() * _film->length().get() / 4096)) {
161 shared_ptr<Image> last = _display;
162 while (last == _display) {
163 _decoders.video->pass ();
170 FilmViewer::panel_sized (wxSizeEvent& ev)
172 _panel_width = ev.GetSize().GetWidth();
173 _panel_height = ev.GetSize().GetHeight();
179 FilmViewer::update_from_raw ()
185 if (_out_width && _out_height) {
186 _display = _raw->scale_and_convert_to_rgb (Size (_out_width, _out_height), 0, Scaler::from_id ("bicubic"));
194 FilmViewer::calculate_sizes ()
196 float const panel_ratio = static_cast<float> (_panel_width) / _panel_height;
197 float const film_ratio = _film->format() ? _film->format()->ratio_as_float(_film) : 1.78;
198 if (panel_ratio < film_ratio) {
199 /* panel is less widscreen than the film; clamp width */
200 _out_width = _panel_width;
201 _out_height = _out_width / film_ratio;
203 /* panel is more widescreen than the film; clamp heignt */
204 _out_height = _panel_height;
205 _out_width = _out_height * film_ratio;
210 FilmViewer::play_clicked (wxCommandEvent &)
216 FilmViewer::check_play_state ()
218 if (_play_button->GetValue()) {
219 _timer.Start (1000 / _film->frames_per_second());
226 FilmViewer::process_video (shared_ptr<Image> image, shared_ptr<Subtitle> sub)
229 if (_out_width && _out_height) {
230 _display = _raw->scale_and_convert_to_rgb (Size (_out_width, _out_height), 0, Scaler::from_id ("bicubic"));