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 , _clear_required (false)
60 _panel->SetDoubleBuffered (true);
61 #if wxMAJOR_VERSION == 2 && wxMINOR_VERSION >= 9
62 _panel->SetBackgroundStyle (wxBG_STYLE_PAINT);
65 _v_sizer = new wxBoxSizer (wxVERTICAL);
68 _v_sizer->Add (_panel, 1, wxEXPAND);
70 wxBoxSizer* h_sizer = new wxBoxSizer (wxHORIZONTAL);
71 h_sizer->Add (_play_button, 0, wxEXPAND);
72 h_sizer->Add (_slider, 1, wxEXPAND);
74 _v_sizer->Add (h_sizer, 0, wxEXPAND);
76 _panel->Connect (wxID_ANY, wxEVT_PAINT, wxPaintEventHandler (FilmViewer::paint_panel), 0, this);
77 _panel->Connect (wxID_ANY, wxEVT_SIZE, wxSizeEventHandler (FilmViewer::panel_sized), 0, this);
78 _slider->Connect (wxID_ANY, wxEVT_SCROLL_THUMBTRACK, wxScrollEventHandler (FilmViewer::slider_moved), 0, this);
79 _slider->Connect (wxID_ANY, wxEVT_SCROLL_PAGEUP, wxScrollEventHandler (FilmViewer::slider_moved), 0, this);
80 _slider->Connect (wxID_ANY, wxEVT_SCROLL_PAGEDOWN, wxScrollEventHandler (FilmViewer::slider_moved), 0, this);
81 _play_button->Connect (wxID_ANY, wxEVT_COMMAND_TOGGLEBUTTON_CLICKED, wxCommandEventHandler (FilmViewer::play_clicked), 0, this);
82 _timer.Connect (wxID_ANY, wxEVT_TIMER, wxTimerEventHandler (FilmViewer::timer), 0, this);
86 JobManager::instance()->ActiveJobsChanged.connect (
87 bind (&FilmViewer::active_jobs_changed, this, _1)
92 FilmViewer::film_changed (Film::Property p)
101 shared_ptr<DecodeOptions> o (new DecodeOptions);
102 o->decode_audio = false;
103 o->decode_subtitles = true;
104 o->video_sync = false;
105 _decoders = decoder_factory (_film, o, 0);
106 _decoders.video->Video.connect (bind (&FilmViewer::process_video, this, _1, _2, _3));
107 _decoders.video->OutputChanged.connect (boost::bind (&FilmViewer::decoder_changed, this));
108 _decoders.video->set_subtitle_stream (_film->subtitle_stream());
112 _slider->Show (_film->content_type() == VIDEO);
113 _play_button->Show (_film->content_type() == VIDEO);
117 case Film::WITH_SUBTITLES:
118 case Film::SUBTITLE_OFFSET:
119 case Film::SUBTITLE_SCALE:
123 case Film::SUBTITLE_STREAM:
124 _decoders.video->set_subtitle_stream (_film->subtitle_stream ());
132 FilmViewer::set_film (shared_ptr<Film> f)
144 _film->Changed.connect (boost::bind (&FilmViewer::film_changed, this, _1));
146 film_changed (Film::CONTENT);
147 film_changed (Film::CROP);
148 film_changed (Film::FORMAT);
149 film_changed (Film::WITH_SUBTITLES);
150 film_changed (Film::SUBTITLE_OFFSET);
151 film_changed (Film::SUBTITLE_SCALE);
152 film_changed (Film::SUBTITLE_STREAM);
156 FilmViewer::decoder_changed ()
158 if (_decoders.video->seek_to_last ()) {
168 FilmViewer::timer (wxTimerEvent& ev)
179 if (_film->length()) {
180 int const new_slider_position = 4096 * _decoders.video->last_source_time() / (_film->length().get() / _film->frames_per_second());
181 if (new_slider_position != _slider->GetValue()) {
182 _slider->SetValue (new_slider_position);
189 FilmViewer::paint_panel (wxPaintEvent& ev)
191 wxPaintDC dc (_panel);
193 if (_clear_required) {
195 _clear_required = false;
198 if (!_display_frame || !_film || !_out_width || !_out_height) {
203 wxImage frame (_out_width, _out_height, _display_frame->data()[0], true);
204 wxBitmap frame_bitmap (frame);
205 dc.DrawBitmap (frame_bitmap, 0, 0);
207 if (_film->with_subtitles() && _display_sub) {
208 wxImage sub (_display_sub->size().width, _display_sub->size().height, _display_sub->data()[0], _display_sub->alpha(), true);
209 wxBitmap sub_bitmap (sub);
210 dc.DrawBitmap (sub_bitmap, _display_sub_position.x, _display_sub_position.y);
216 FilmViewer::slider_moved (wxScrollEvent &)
218 if (!_film || !_film->length()) {
222 if (_decoders.video->seek (_slider->GetValue() * _film->length().get() / (4096 * _film->frames_per_second()))) {
232 FilmViewer::panel_sized (wxSizeEvent& ev)
234 _panel_width = ev.GetSize().GetWidth();
235 _panel_height = ev.GetSize().GetHeight();
241 FilmViewer::update_from_raw ()
254 FilmViewer::raw_to_display ()
256 if (!_raw_frame || _out_width < 64 || _out_height < 64 || !_film) {
261 if (_display_frame) {
262 old_size = _display_frame->size();
265 /* Get a compacted image as we have to feed it to wxWidgets */
266 _display_frame = _raw_frame->scale_and_convert_to_rgb (Size (_out_width, _out_height), 0, _film->scaler(), false);
268 if (old_size != _display_frame->size()) {
269 _clear_required = true;
273 Rect tx = subtitle_transformed_area (
274 float (_out_width) / _film->size().width,
275 float (_out_height) / _film->size().height,
276 _raw_sub->area(), _film->subtitle_offset(), _film->subtitle_scale()
279 _display_sub.reset (new RGBPlusAlphaImage (_raw_sub->image()->scale (tx.size(), _film->scaler(), false)));
280 _display_sub_position = tx.position();
282 _display_sub.reset ();
287 FilmViewer::calculate_sizes ()
293 float const panel_ratio = static_cast<float> (_panel_width) / _panel_height;
294 float const film_ratio = _film->format() ? _film->format()->ratio_as_float(_film) : 1.78;
295 if (panel_ratio < film_ratio) {
296 /* panel is less widscreen than the film; clamp width */
297 _out_width = _panel_width;
298 _out_height = _out_width / film_ratio;
300 /* panel is more widescreen than the film; clamp heignt */
301 _out_height = _panel_height;
302 _out_width = _out_height * film_ratio;
307 FilmViewer::play_clicked (wxCommandEvent &)
313 FilmViewer::check_play_state ()
319 if (_play_button->GetValue()) {
320 _timer.Start (1000 / _film->frames_per_second());
327 FilmViewer::process_video (shared_ptr<Image> image, bool, shared_ptr<Subtitle> sub)
338 FilmViewer::get_frame ()
340 /* Clear our raw frame in case we don't get a new one */
345 while (!_got_frame) {
346 if (_decoders.video->pass ()) {
347 /* We didn't get a frame before the decoder gave up,
348 so clear our display frame.
350 _display_frame.reset ();
354 } catch (DecodeError& e) {
355 error_dialog (this, String::compose ("Could not decode video for view (%1)", e.what()));
360 FilmViewer::active_jobs_changed (bool a)
363 list<shared_ptr<Job> > jobs = JobManager::instance()->get ();
364 list<shared_ptr<Job> >::iterator i = jobs.begin ();
365 while (i != jobs.end() && boost::dynamic_pointer_cast<ExamineContentJob> (*i) == 0) {
369 if (i == jobs.end() || (*i)->finished()) {
370 /* no examine content job running, so we're ok to use the viewer */
375 _slider->Enable (!a);
376 _play_button->Enable (!a);