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/subtitle.h"
32 #include "lib/image.h"
33 #include "lib/scaler.h"
34 #include "lib/exceptions.h"
35 #include "lib/examine_content_job.h"
36 #include "lib/filter.h"
37 #include "lib/player.h"
38 #include "lib/video_content.h"
39 #include "lib/ffmpeg_content.h"
40 #include "lib/imagemagick_content.h"
41 #include "film_viewer.h"
43 #include "video_decoder.h"
50 using boost::shared_ptr;
51 using boost::dynamic_pointer_cast;
54 FilmViewer::FilmViewer (shared_ptr<Film> f, wxWindow* p)
56 , _panel (new wxPanel (this))
57 , _slider (new wxSlider (this, wxID_ANY, 0, 0, 4096))
58 , _play_button (new wxToggleButton (this, wxID_ANY, _("Play")))
59 , _display_frame_x (0)
61 , _clear_required (false)
63 _panel->SetDoubleBuffered (true);
64 #if wxMAJOR_VERSION == 2 && wxMINOR_VERSION >= 9
65 _panel->SetBackgroundStyle (wxBG_STYLE_PAINT);
68 _v_sizer = new wxBoxSizer (wxVERTICAL);
71 _v_sizer->Add (_panel, 1, wxEXPAND);
73 wxBoxSizer* h_sizer = new wxBoxSizer (wxHORIZONTAL);
74 h_sizer->Add (_play_button, 0, wxEXPAND);
75 h_sizer->Add (_slider, 1, wxEXPAND);
77 _v_sizer->Add (h_sizer, 0, wxEXPAND | wxALL, 6);
79 _panel->Connect (wxID_ANY, wxEVT_PAINT, wxPaintEventHandler (FilmViewer::paint_panel), 0, this);
80 _panel->Connect (wxID_ANY, wxEVT_SIZE, wxSizeEventHandler (FilmViewer::panel_sized), 0, this);
81 _slider->Connect (wxID_ANY, wxEVT_SCROLL_THUMBTRACK, wxScrollEventHandler (FilmViewer::slider_moved), 0, this);
82 _slider->Connect (wxID_ANY, wxEVT_SCROLL_PAGEUP, wxScrollEventHandler (FilmViewer::slider_moved), 0, this);
83 _slider->Connect (wxID_ANY, wxEVT_SCROLL_PAGEDOWN, wxScrollEventHandler (FilmViewer::slider_moved), 0, this);
84 _play_button->Connect (wxID_ANY, wxEVT_COMMAND_TOGGLEBUTTON_CLICKED, wxCommandEventHandler (FilmViewer::play_clicked), 0, this);
85 _timer.Connect (wxID_ANY, wxEVT_TIMER, wxTimerEventHandler (FilmViewer::timer), 0, this);
87 /* We need a player before we set_film() so that the first frame will be displayed */
88 _player = f->player ();
89 _player->disable_audio ();
90 _player->disable_video_sync ();
91 /* Don't disable subtitles here as we may need them, and it's nice to be able to turn them
92 on and off without needing obtain a new Player.
95 _player->Video.connect (bind (&FilmViewer::process_video, this, _1, _2, _3));
99 JobManager::instance()->ActiveJobsChanged.connect (
100 bind (&FilmViewer::active_jobs_changed, this, _1)
105 FilmViewer::film_changed (Film::Property p)
120 case Film::WITH_SUBTITLES:
121 case Film::SUBTITLE_OFFSET:
122 case Film::SUBTITLE_SCALE:
130 update_from_decoder ();
138 FilmViewer::set_film (shared_ptr<Film> f)
150 _film->Changed.connect (boost::bind (&FilmViewer::film_changed, this, _1));
152 film_changed (Film::CONTENT);
153 film_changed (Film::FORMAT);
154 film_changed (Film::WITH_SUBTITLES);
155 film_changed (Film::SUBTITLE_OFFSET);
156 film_changed (Film::SUBTITLE_SCALE);
160 FilmViewer::update_from_decoder ()
162 if (!_player || _player->seek_to_last ()) {
172 FilmViewer::timer (wxTimerEvent &)
183 if (_film->video_length()) {
184 int const new_slider_position = 4096 * _player->last_video_time() / (_film->video_length() / _film->video_frame_rate());
185 if (new_slider_position != _slider->GetValue()) {
186 _slider->SetValue (new_slider_position);
193 FilmViewer::paint_panel (wxPaintEvent &)
195 wxPaintDC dc (_panel);
197 if (_clear_required) {
199 _clear_required = false;
202 if (!_display_frame || !_film || !_out_size.width || !_out_size.height) {
207 if (_display_frame_x) {
208 dc.SetPen(*wxBLACK_PEN);
209 dc.SetBrush(*wxBLACK_BRUSH);
210 dc.DrawRectangle (0, 0, _display_frame_x, _film_size.height);
211 dc.DrawRectangle (_display_frame_x + _film_size.width, 0, _display_frame_x, _film_size.height);
214 wxImage frame (_film_size.width, _film_size.height, _display_frame->data()[0], true);
215 wxBitmap frame_bitmap (frame);
216 dc.DrawBitmap (frame_bitmap, _display_frame_x, 0);
218 if (_film->with_subtitles() && _display_sub) {
219 wxImage sub (_display_sub->size().width, _display_sub->size().height, _display_sub->data()[0], _display_sub->alpha(), true);
220 wxBitmap sub_bitmap (sub);
221 dc.DrawBitmap (sub_bitmap, _display_sub_position.x, _display_sub_position.y);
227 FilmViewer::slider_moved (wxScrollEvent &)
229 if (!_film || !_player) {
233 if (_player->seek (_slider->GetValue() * _film->video_length() / (4096 * _film->video_frame_rate()))) {
243 FilmViewer::panel_sized (wxSizeEvent& ev)
245 _panel_size.width = ev.GetSize().GetWidth();
246 _panel_size.height = ev.GetSize().GetHeight();
252 FilmViewer::update_from_raw ()
265 FilmViewer::raw_to_display ()
267 if (!_raw_frame || _out_size.width < 64 || _out_size.height < 64 || !_film) {
271 libdcp::Size old_size;
272 if (_display_frame) {
273 old_size = _display_frame->size();
276 shared_ptr<Image> input = _raw_frame;
278 pair<string, string> const s = Filter::ffmpeg_strings (_film->filters());
279 if (!s.second.empty ()) {
280 input = input->post_process (s.second, true);
283 /* Get a compacted image as we have to feed it to wxWidgets */
284 _display_frame = input->scale_and_convert_to_rgb (_film_size, 0, _film->scaler(), false);
286 if (old_size != _display_frame->size()) {
287 _clear_required = true;
292 /* Our output is already cropped by the decoder, so we need to account for that
293 when working out the scale that we are applying.
296 Size const cropped_size = _film->cropped_size (_film->video_size ());
298 Rect tx = subtitle_transformed_area (
299 float (_film_size.width) / cropped_size.width,
300 float (_film_size.height) / cropped_size.height,
301 _raw_sub->area(), _film->subtitle_offset(), _film->subtitle_scale()
304 _display_sub.reset (new RGBPlusAlphaImage (_raw_sub->image()->scale (tx.size(), _film->scaler(), false)));
305 _display_sub_position = tx.position();
306 _display_sub_position.x += _display_frame_x;
308 _display_sub.reset ();
313 FilmViewer::calculate_sizes ()
315 if (!_film || !_player) {
319 Format const * format = _film->format ();
321 float const panel_ratio = static_cast<float> (_panel_size.width) / _panel_size.height;
322 float const film_ratio = format ? format->container_ratio_as_float () : 1.78;
324 if (panel_ratio < film_ratio) {
325 /* panel is less widscreen than the film; clamp width */
326 _out_size.width = _panel_size.width;
327 _out_size.height = _out_size.width / film_ratio;
329 /* panel is more widescreen than the film; clamp height */
330 _out_size.height = _panel_size.height;
331 _out_size.width = _out_size.height * film_ratio;
334 /* Work out how much padding there is in terms of our display; this will be the x position
335 of our _display_frame.
337 _display_frame_x = 0;
339 _display_frame_x = static_cast<float> (format->dcp_padding (_film)) * _out_size.width / format->dcp_size().width;
342 _film_size = _out_size;
343 _film_size.width -= _display_frame_x * 2;
345 /* Catch silly values */
346 if (_out_size.width < 64) {
347 _out_size.width = 64;
352 FilmViewer::play_clicked (wxCommandEvent &)
358 FilmViewer::check_play_state ()
364 if (_play_button->GetValue()) {
365 _timer.Start (1000 / _film->video_frame_rate());
372 FilmViewer::process_video (shared_ptr<Image> image, bool, shared_ptr<Subtitle> sub)
382 /** Get a new _raw_frame from the decoder and then do
386 FilmViewer::get_frame ()
388 /* Clear our raw frame in case we don't get a new one */
392 _display_frame.reset ();
398 while (!_got_frame) {
399 if (_player->pass ()) {
400 /* We didn't get a frame before the decoder gave up,
401 so clear our display frame.
403 _display_frame.reset ();
407 } catch (DecodeError& e) {
408 _play_button->SetValue (false);
410 error_dialog (this, wxString::Format (_("Could not decode video for view (%s)"), std_to_wx(e.what()).data()));
415 FilmViewer::active_jobs_changed (bool a)
418 list<shared_ptr<Job> > jobs = JobManager::instance()->get ();
419 list<shared_ptr<Job> >::iterator i = jobs.begin ();
420 while (i != jobs.end() && boost::dynamic_pointer_cast<ExamineContentJob> (*i) == 0) {
424 if (i == jobs.end() || (*i)->finished()) {
425 /* no examine content job running, so we're ok to use the viewer */
430 _slider->Enable (!a);
431 _play_button->Enable (!a);