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 #if wxMAJOR_VERSION == 2 && wxMINOR_VERSION >= 9
60 _panel->SetBackgroundStyle (wxBG_STYLE_PAINT);
63 wxBoxSizer* v_sizer = new wxBoxSizer (wxVERTICAL);
66 v_sizer->Add (_panel, 1, wxEXPAND);
68 wxBoxSizer* h_sizer = new wxBoxSizer (wxHORIZONTAL);
69 h_sizer->Add (_play_button, 0, wxEXPAND);
70 h_sizer->Add (_slider, 1, wxEXPAND);
72 v_sizer->Add (h_sizer, 0, wxEXPAND);
74 _panel->Connect (wxID_ANY, wxEVT_PAINT, wxPaintEventHandler (FilmViewer::paint_panel), 0, this);
75 _panel->Connect (wxID_ANY, wxEVT_SIZE, wxSizeEventHandler (FilmViewer::panel_sized), 0, this);
76 _slider->Connect (wxID_ANY, wxEVT_SCROLL_THUMBTRACK, wxScrollEventHandler (FilmViewer::slider_moved), 0, this);
77 _slider->Connect (wxID_ANY, wxEVT_SCROLL_PAGEUP, wxScrollEventHandler (FilmViewer::slider_moved), 0, this);
78 _slider->Connect (wxID_ANY, wxEVT_SCROLL_PAGEDOWN, wxScrollEventHandler (FilmViewer::slider_moved), 0, this);
79 _play_button->Connect (wxID_ANY, wxEVT_COMMAND_TOGGLEBUTTON_CLICKED, wxCommandEventHandler (FilmViewer::play_clicked), 0, this);
80 _timer.Connect (wxID_ANY, wxEVT_TIMER, wxTimerEventHandler (FilmViewer::timer), 0, this);
84 JobManager::instance()->ActiveJobsChanged.connect (
85 bind (&FilmViewer::active_jobs_changed, this, _1)
90 FilmViewer::film_changed (Film::Property p)
99 shared_ptr<DecodeOptions> o (new DecodeOptions);
100 o->decode_audio = false;
101 o->decode_subtitles = true;
102 o->video_sync = false;
103 _decoders = decoder_factory (_film, o, 0);
104 _decoders.video->Video.connect (bind (&FilmViewer::process_video, this, _1, _2));
105 _decoders.video->OutputChanged.connect (boost::bind (&FilmViewer::decoder_changed, this));
106 _decoders.video->set_subtitle_stream (_film->subtitle_stream());
110 _slider->Show (_film->content_type() == VIDEO);
111 _play_button->Show (_film->content_type() == VIDEO);
114 case Film::WITH_SUBTITLES:
115 case Film::SUBTITLE_OFFSET:
116 case Film::SUBTITLE_SCALE:
120 case Film::SUBTITLE_STREAM:
121 _decoders.video->set_subtitle_stream (_film->subtitle_stream ());
129 FilmViewer::set_film (shared_ptr<Film> f)
141 _film->Changed.connect (boost::bind (&FilmViewer::film_changed, this, _1));
143 film_changed (Film::CONTENT);
144 film_changed (Film::CROP);
145 film_changed (Film::FORMAT);
146 film_changed (Film::WITH_SUBTITLES);
147 film_changed (Film::SUBTITLE_OFFSET);
148 film_changed (Film::SUBTITLE_SCALE);
149 film_changed (Film::SUBTITLE_STREAM);
153 FilmViewer::decoder_changed ()
155 if (_decoders.video->seek_to_last ()) {
165 FilmViewer::timer (wxTimerEvent& ev)
176 if (_film->length()) {
177 int const new_slider_position = 4096 * _decoders.video->last_source_time() / (_film->length().get() / _film->frames_per_second());
178 if (new_slider_position != _slider->GetValue()) {
179 _slider->SetValue (new_slider_position);
186 FilmViewer::paint_panel (wxPaintEvent& ev)
188 wxPaintDC dc (_panel);
190 if (!_display_frame || !_film || !_out_width || !_out_height) {
195 wxImage frame (_out_width, _out_height, _display_frame->data()[0], true);
196 wxBitmap frame_bitmap (frame);
197 dc.DrawBitmap (frame_bitmap, 0, 0);
199 if (_film->with_subtitles() && _display_sub) {
200 wxImage sub (_display_sub->size().width, _display_sub->size().height, _display_sub->data()[0], _display_sub->alpha(), true);
201 wxBitmap sub_bitmap (sub);
202 dc.DrawBitmap (sub_bitmap, _display_sub_position.x, _display_sub_position.y);
208 FilmViewer::slider_moved (wxScrollEvent &)
210 if (!_film || !_film->length()) {
214 if (_decoders.video->seek (_slider->GetValue() * _film->length().get() / (4096 * _film->frames_per_second()))) {
224 FilmViewer::panel_sized (wxSizeEvent& ev)
226 _panel_width = ev.GetSize().GetWidth();
227 _panel_height = ev.GetSize().GetHeight();
233 FilmViewer::update_from_raw ()
246 FilmViewer::raw_to_display ()
248 if (!_raw_frame || _out_width < 64 || _out_height < 64 || !_film) {
252 /* Get a compacted image as we have to feed it to wxWidgets */
253 _display_frame = _raw_frame->scale_and_convert_to_rgb (Size (_out_width, _out_height), 0, _film->scaler(), false);
256 Rect tx = subtitle_transformed_area (
257 float (_out_width) / _film->size().width,
258 float (_out_height) / _film->size().height,
259 _raw_sub->area(), _film->subtitle_offset(), _film->subtitle_scale()
262 _display_sub.reset (new RGBPlusAlphaImage (_raw_sub->image()->scale (tx.size(), _film->scaler(), false)));
263 _display_sub_position = tx.position();
265 _display_sub.reset ();
270 FilmViewer::calculate_sizes ()
276 float const panel_ratio = static_cast<float> (_panel_width) / _panel_height;
277 float const film_ratio = _film->format() ? _film->format()->ratio_as_float(_film) : 1.78;
278 if (panel_ratio < film_ratio) {
279 /* panel is less widscreen than the film; clamp width */
280 _out_width = _panel_width;
281 _out_height = _out_width / film_ratio;
283 /* panel is more widescreen than the film; clamp heignt */
284 _out_height = _panel_height;
285 _out_width = _out_height * film_ratio;
290 FilmViewer::play_clicked (wxCommandEvent &)
296 FilmViewer::check_play_state ()
302 if (_play_button->GetValue()) {
303 _timer.Start (1000 / _film->frames_per_second());
310 FilmViewer::process_video (shared_ptr<Image> image, shared_ptr<Subtitle> sub)
319 FilmViewer::get_frame ()
321 /* Clear our raw frame in case we don't get a new one */
325 shared_ptr<Image> last = _display_frame;
326 while (last == _display_frame) {
327 if (_decoders.video->pass ()) {
328 /* We didn't get a frame before the decoder gave up,
329 so clear our display frame.
331 _display_frame.reset ();
335 } catch (DecodeError& e) {
336 error_dialog (this, String::compose ("Could not decode video for view (%1)", e.what()));
341 FilmViewer::active_jobs_changed (bool a)
344 list<shared_ptr<Job> > jobs = JobManager::instance()->get ();
345 list<shared_ptr<Job> >::iterator i = jobs.begin ();
346 while (i != jobs.end() && boost::dynamic_pointer_cast<ExamineContentJob> (*i) == 0) {
350 if (i == jobs.end() || (*i)->finished()) {
351 /* no examine content job running, so we're ok to use the viewer */
356 _slider->Enable (!a);
357 _play_button->Enable (!a);