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")))
54 , _display_frame_x (0)
56 , _clear_required (false)
58 _panel->SetDoubleBuffered (true);
59 #if wxMAJOR_VERSION == 2 && wxMINOR_VERSION >= 9
60 _panel->SetBackgroundStyle (wxBG_STYLE_PAINT);
63 _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)
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, _3));
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);
115 case Film::WITH_SUBTITLES:
116 case Film::SUBTITLE_OFFSET:
117 case Film::SUBTITLE_SCALE:
121 case Film::SUBTITLE_STREAM:
122 _decoders.video->set_subtitle_stream (_film->subtitle_stream ());
130 FilmViewer::set_film (shared_ptr<Film> f)
142 _film->Changed.connect (boost::bind (&FilmViewer::film_changed, this, _1));
144 film_changed (Film::CONTENT);
145 film_changed (Film::CROP);
146 film_changed (Film::FORMAT);
147 film_changed (Film::WITH_SUBTITLES);
148 film_changed (Film::SUBTITLE_OFFSET);
149 film_changed (Film::SUBTITLE_SCALE);
150 film_changed (Film::SUBTITLE_STREAM);
154 FilmViewer::decoder_changed ()
156 if (_decoders.video->seek_to_last ()) {
166 FilmViewer::timer (wxTimerEvent &)
177 if (_film->length()) {
178 int const new_slider_position = 4096 * _decoders.video->last_source_time() / (_film->length().get() / _film->frames_per_second());
179 if (new_slider_position != _slider->GetValue()) {
180 _slider->SetValue (new_slider_position);
187 FilmViewer::paint_panel (wxPaintEvent &)
189 wxPaintDC dc (_panel);
191 if (_clear_required) {
193 _clear_required = false;
196 if (!_display_frame || !_film || !_out_size.width || !_out_size.height) {
201 if (_display_frame_x) {
202 dc.SetPen(*wxBLACK_PEN);
203 dc.SetBrush(*wxBLACK_BRUSH);
204 dc.DrawRectangle (0, 0, _display_frame_x, _film_size.height);
205 dc.DrawRectangle (_display_frame_x + _film_size.width, 0, _display_frame_x * 2 + _film_size.width, _film_size.height);
208 wxImage frame (_film_size.width, _film_size.height, _display_frame->data()[0], true);
209 wxBitmap frame_bitmap (frame);
210 dc.DrawBitmap (frame_bitmap, _display_frame_x, 0);
212 if (_film->with_subtitles() && _display_sub) {
213 wxImage sub (_display_sub->size().width, _display_sub->size().height, _display_sub->data()[0], _display_sub->alpha(), true);
214 wxBitmap sub_bitmap (sub);
215 dc.DrawBitmap (sub_bitmap, _display_sub_position.x, _display_sub_position.y);
221 FilmViewer::slider_moved (wxScrollEvent &)
223 if (!_film || !_film->length()) {
227 if (_decoders.video->seek (_slider->GetValue() * _film->length().get() / (4096 * _film->frames_per_second()))) {
237 FilmViewer::panel_sized (wxSizeEvent& ev)
239 _panel_size.width = ev.GetSize().GetWidth();
240 _panel_size.height = ev.GetSize().GetHeight();
246 FilmViewer::update_from_raw ()
259 FilmViewer::raw_to_display ()
261 if (!_raw_frame || _out_size.width < 64 || _out_size.height < 64 || !_film) {
265 libdcp::Size old_size;
266 if (_display_frame) {
267 old_size = _display_frame->size();
270 /* Get a compacted image as we have to feed it to wxWidgets */
271 _display_frame = _raw_frame->scale_and_convert_to_rgb (_film_size, 0, _film->scaler(), false);
273 if (old_size != _display_frame->size()) {
274 _clear_required = true;
278 Rect tx = subtitle_transformed_area (
279 float (_film_size.width) / _film->size().width,
280 float (_film_size.height) / _film->size().height,
281 _raw_sub->area(), _film->subtitle_offset(), _film->subtitle_scale()
284 _display_sub.reset (new RGBPlusAlphaImage (_raw_sub->image()->scale (tx.size(), _film->scaler(), false)));
285 _display_sub_position = tx.position();
286 _display_sub_position.x += _display_frame_x;
288 _display_sub.reset ();
293 FilmViewer::calculate_sizes ()
299 Format const * format = _film->format ();
301 float const panel_ratio = static_cast<float> (_panel_size.width) / _panel_size.height;
302 float const film_ratio = format ? format->container_ratio_as_float () : 1.78;
304 if (panel_ratio < film_ratio) {
305 /* panel is less widscreen than the film; clamp width */
306 _out_size.width = _panel_size.width;
307 _out_size.height = _out_size.width / film_ratio;
309 /* panel is more widescreen than the film; clamp height */
310 _out_size.height = _panel_size.height;
311 _out_size.width = _out_size.height * film_ratio;
314 /* Work out how much padding there is in terms of our display; this will be the x position
315 of our _display_frame.
317 _display_frame_x = 0;
319 _display_frame_x = static_cast<float> (format->dcp_padding (_film)) * _out_size.width / format->dcp_size().width;
322 _film_size = _out_size;
323 _film_size.width -= _display_frame_x * 2;
325 /* Catch silly values */
326 if (_out_size.width < 64) {
327 _out_size.width = 64;
332 FilmViewer::play_clicked (wxCommandEvent &)
338 FilmViewer::check_play_state ()
344 if (_play_button->GetValue()) {
345 _timer.Start (1000 / _film->frames_per_second());
352 FilmViewer::process_video (shared_ptr<Image> image, bool, shared_ptr<Subtitle> sub)
363 FilmViewer::get_frame ()
365 /* Clear our raw frame in case we don't get a new one */
370 while (!_got_frame) {
371 if (_decoders.video->pass ()) {
372 /* We didn't get a frame before the decoder gave up,
373 so clear our display frame.
375 _display_frame.reset ();
379 } catch (DecodeError& e) {
380 _play_button->SetValue (false);
382 error_dialog (this, String::compose ("Could not decode video for view (%1)", e.what()));
387 FilmViewer::active_jobs_changed (bool a)
390 list<shared_ptr<Job> > jobs = JobManager::instance()->get ();
391 list<shared_ptr<Job> >::iterator i = jobs.begin ();
392 while (i != jobs.end() && boost::dynamic_pointer_cast<ExamineContentJob> (*i) == 0) {
396 if (i == jobs.end() || (*i)->finished()) {
397 /* no examine content job running, so we're ok to use the viewer */
402 _slider->Enable (!a);
403 _play_button->Enable (!a);