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;
49 FilmViewer::FilmViewer (shared_ptr<Film> f, wxWindow* p)
51 , _panel (new wxPanel (this))
52 , _slider (new wxSlider (this, wxID_ANY, 0, 0, 4096))
53 , _play_button (new wxToggleButton (this, wxID_ANY, wxT ("Play")))
59 , _clear_required (false)
61 _panel->SetDoubleBuffered (true);
62 #if wxMAJOR_VERSION == 2 && wxMINOR_VERSION >= 9
63 _panel->SetBackgroundStyle (wxBG_STYLE_PAINT);
66 _v_sizer = new wxBoxSizer (wxVERTICAL);
69 _v_sizer->Add (_panel, 1, wxEXPAND);
71 wxBoxSizer* h_sizer = new wxBoxSizer (wxHORIZONTAL);
72 h_sizer->Add (_play_button, 0, wxEXPAND);
73 h_sizer->Add (_slider, 1, wxEXPAND);
75 _v_sizer->Add (h_sizer, 0, wxEXPAND);
77 _panel->Connect (wxID_ANY, wxEVT_PAINT, wxPaintEventHandler (FilmViewer::paint_panel), 0, this);
78 _panel->Connect (wxID_ANY, wxEVT_SIZE, wxSizeEventHandler (FilmViewer::panel_sized), 0, this);
79 _slider->Connect (wxID_ANY, wxEVT_SCROLL_THUMBTRACK, wxScrollEventHandler (FilmViewer::slider_moved), 0, this);
80 _slider->Connect (wxID_ANY, wxEVT_SCROLL_PAGEUP, wxScrollEventHandler (FilmViewer::slider_moved), 0, this);
81 _slider->Connect (wxID_ANY, wxEVT_SCROLL_PAGEDOWN, wxScrollEventHandler (FilmViewer::slider_moved), 0, this);
82 _play_button->Connect (wxID_ANY, wxEVT_COMMAND_TOGGLEBUTTON_CLICKED, wxCommandEventHandler (FilmViewer::play_clicked), 0, this);
83 _timer.Connect (wxID_ANY, wxEVT_TIMER, wxTimerEventHandler (FilmViewer::timer), 0, this);
87 JobManager::instance()->ActiveJobsChanged.connect (
88 bind (&FilmViewer::active_jobs_changed, this, _1)
93 FilmViewer::film_changed (Film::Property p)
103 o.decode_audio = false;
104 o.decode_subtitles = true;
105 o.video_sync = false;
106 _decoders = decoder_factory (_film, o, 0);
107 _decoders.video->Video.connect (bind (&FilmViewer::process_video, this, _1, _2, _3));
108 _decoders.video->OutputChanged.connect (boost::bind (&FilmViewer::decoder_changed, this));
109 _decoders.video->set_subtitle_stream (_film->subtitle_stream());
113 _slider->Show (_film->content_type() == VIDEO);
114 _play_button->Show (_film->content_type() == VIDEO);
118 case Film::WITH_SUBTITLES:
119 case Film::SUBTITLE_OFFSET:
120 case Film::SUBTITLE_SCALE:
124 case Film::SUBTITLE_STREAM:
125 _decoders.video->set_subtitle_stream (_film->subtitle_stream ());
133 FilmViewer::set_film (shared_ptr<Film> f)
145 _film->Changed.connect (boost::bind (&FilmViewer::film_changed, this, _1));
147 film_changed (Film::CONTENT);
148 film_changed (Film::CROP);
149 film_changed (Film::FORMAT);
150 film_changed (Film::WITH_SUBTITLES);
151 film_changed (Film::SUBTITLE_OFFSET);
152 film_changed (Film::SUBTITLE_SCALE);
153 film_changed (Film::SUBTITLE_STREAM);
157 FilmViewer::decoder_changed ()
159 if (_decoders.video->seek_to_last ()) {
169 FilmViewer::timer (wxTimerEvent &)
180 if (_film->length()) {
181 int const new_slider_position = 4096 * _decoders.video->last_source_time() / (_film->length().get() / _film->frames_per_second());
182 if (new_slider_position != _slider->GetValue()) {
183 _slider->SetValue (new_slider_position);
190 FilmViewer::paint_panel (wxPaintEvent &)
192 wxPaintDC dc (_panel);
194 if (_clear_required) {
196 _clear_required = false;
199 if (!_display_frame || !_film || !_out_width || !_out_height) {
204 wxImage frame (_out_width, _out_height, _display_frame->data()[0], true);
205 wxBitmap frame_bitmap (frame);
206 dc.DrawBitmap (frame_bitmap, 0, 0);
208 if (_film->with_subtitles() && _display_sub) {
209 wxImage sub (_display_sub->size().width, _display_sub->size().height, _display_sub->data()[0], _display_sub->alpha(), true);
210 wxBitmap sub_bitmap (sub);
211 dc.DrawBitmap (sub_bitmap, _display_sub_position.x, _display_sub_position.y);
217 FilmViewer::slider_moved (wxScrollEvent &)
219 if (!_film || !_film->length()) {
223 if (_decoders.video->seek (_slider->GetValue() * _film->length().get() / (4096 * _film->frames_per_second()))) {
233 FilmViewer::panel_sized (wxSizeEvent& ev)
235 _panel_width = ev.GetSize().GetWidth();
236 _panel_height = ev.GetSize().GetHeight();
242 FilmViewer::update_from_raw ()
255 FilmViewer::raw_to_display ()
257 if (!_raw_frame || _out_width < 64 || _out_height < 64 || !_film) {
262 if (_display_frame) {
263 old_size = _display_frame->size();
266 /* Get a compacted image as we have to feed it to wxWidgets */
267 _display_frame = _raw_frame->scale_and_convert_to_rgb (Size (_out_width, _out_height), 0, _film->scaler(), false);
269 if (old_size != _display_frame->size()) {
270 _clear_required = true;
274 Rect tx = subtitle_transformed_area (
275 float (_out_width) / _film->size().width,
276 float (_out_height) / _film->size().height,
277 _raw_sub->area(), _film->subtitle_offset(), _film->subtitle_scale()
280 _display_sub.reset (new RGBPlusAlphaImage (_raw_sub->image()->scale (tx.size(), _film->scaler(), false)));
281 _display_sub_position = tx.position();
283 _display_sub.reset ();
288 FilmViewer::calculate_sizes ()
294 float const panel_ratio = static_cast<float> (_panel_width) / _panel_height;
295 float const film_ratio = _film->format() ? _film->format()->ratio_as_float(_film) : 1.78;
296 if (panel_ratio < film_ratio) {
297 /* panel is less widscreen than the film; clamp width */
298 _out_width = _panel_width;
299 _out_height = _out_width / film_ratio;
301 /* panel is more widescreen than the film; clamp heignt */
302 _out_height = _panel_height;
303 _out_width = _out_height * film_ratio;
308 FilmViewer::play_clicked (wxCommandEvent &)
314 FilmViewer::check_play_state ()
320 if (_play_button->GetValue()) {
321 _timer.Start (1000 / _film->frames_per_second());
328 FilmViewer::process_video (shared_ptr<Image> image, bool, shared_ptr<Subtitle> sub)
339 FilmViewer::get_frame ()
341 /* Clear our raw frame in case we don't get a new one */
346 while (!_got_frame) {
347 if (_decoders.video->pass ()) {
348 /* We didn't get a frame before the decoder gave up,
349 so clear our display frame.
351 _display_frame.reset ();
355 } catch (DecodeError& e) {
356 error_dialog (this, String::compose ("Could not decode video for view (%1)", e.what()));
361 FilmViewer::active_jobs_changed (bool a)
364 list<shared_ptr<Job> > jobs = JobManager::instance()->get ();
365 list<shared_ptr<Job> >::iterator i = jobs.begin ();
366 while (i != jobs.end() && boost::dynamic_pointer_cast<ExamineContentJob> (*i) == 0) {
370 if (i == jobs.end() || (*i)->finished()) {
371 /* no examine content job running, so we're ok to use the viewer */
376 _slider->Enable (!a);
377 _play_button->Enable (!a);