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 "film_viewer.h"
42 #include "video_decoder.h"
49 using boost::shared_ptr;
52 FilmViewer::FilmViewer (shared_ptr<Film> f, wxWindow* p)
54 , _panel (new wxPanel (this))
55 , _slider (new wxSlider (this, wxID_ANY, 0, 0, 4096))
56 , _play_button (new wxToggleButton (this, wxID_ANY, _("Play")))
57 , _display_frame_x (0)
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 | wxALL, 6);
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)
109 case Film::WITH_SUBTITLES:
110 case Film::SUBTITLE_OFFSET:
111 case Film::SUBTITLE_SCALE:
119 update_from_decoder ();
127 FilmViewer::setup_player ()
129 _player = _film->player ();
130 _player->disable_audio ();
131 _player->disable_video_sync ();
133 /* Don't disable subtitles here as we may need them, and it's nice to be able to turn them
134 on and off without needing obtain a new Player.
137 _player->Video.connect (bind (&FilmViewer::process_video, this, _1, _2, _3));
141 FilmViewer::film_content_changed (int p)
143 if (p == VideoContentProperty::VIDEO_LENGTH || p == VideoContentProperty::VIDEO_SIZE) {
153 FilmViewer::set_film (shared_ptr<Film> f)
165 _film->Changed.connect (boost::bind (&FilmViewer::film_changed, this, _1));
166 _film->ContentChanged.connect (boost::bind (&FilmViewer::film_content_changed, this, _1));
168 film_changed (Film::CONTENT);
169 film_changed (Film::FORMAT);
170 film_changed (Film::WITH_SUBTITLES);
171 film_changed (Film::SUBTITLE_OFFSET);
172 film_changed (Film::SUBTITLE_SCALE);
173 film_content_changed (FFmpegContentProperty::SUBTITLE_STREAM);
177 FilmViewer::update_from_decoder ()
179 if (!_player || _player->seek_to_last ()) {
189 FilmViewer::timer (wxTimerEvent &)
200 if (_film->video_length()) {
201 int const new_slider_position = 4096 * _player->last_video_time() / (_film->video_length() / _film->video_frame_rate());
202 if (new_slider_position != _slider->GetValue()) {
203 _slider->SetValue (new_slider_position);
210 FilmViewer::paint_panel (wxPaintEvent &)
212 wxPaintDC dc (_panel);
214 if (_clear_required) {
216 _clear_required = false;
219 if (!_display_frame || !_film || !_out_size.width || !_out_size.height) {
224 if (_display_frame_x) {
225 dc.SetPen(*wxBLACK_PEN);
226 dc.SetBrush(*wxBLACK_BRUSH);
227 dc.DrawRectangle (0, 0, _display_frame_x, _film_size.height);
228 dc.DrawRectangle (_display_frame_x + _film_size.width, 0, _display_frame_x, _film_size.height);
231 wxImage frame (_film_size.width, _film_size.height, _display_frame->data()[0], true);
232 wxBitmap frame_bitmap (frame);
233 dc.DrawBitmap (frame_bitmap, _display_frame_x, 0);
235 if (_film->with_subtitles() && _display_sub) {
236 wxImage sub (_display_sub->size().width, _display_sub->size().height, _display_sub->data()[0], _display_sub->alpha(), true);
237 wxBitmap sub_bitmap (sub);
238 dc.DrawBitmap (sub_bitmap, _display_sub_position.x, _display_sub_position.y);
244 FilmViewer::slider_moved (wxScrollEvent &)
246 if (!_film || !_player) {
250 if (_player->seek (_slider->GetValue() * _film->video_length() / (4096 * _film->video_frame_rate()))) {
260 FilmViewer::panel_sized (wxSizeEvent& ev)
262 _panel_size.width = ev.GetSize().GetWidth();
263 _panel_size.height = ev.GetSize().GetHeight();
269 FilmViewer::update_from_raw ()
282 FilmViewer::raw_to_display ()
284 if (!_raw_frame || _out_size.width < 64 || _out_size.height < 64 || !_film) {
288 libdcp::Size old_size;
289 if (_display_frame) {
290 old_size = _display_frame->size();
293 boost::shared_ptr<Image> input = _raw_frame;
295 pair<string, string> const s = Filter::ffmpeg_strings (_film->filters());
296 if (!s.second.empty ()) {
297 input = input->post_process (s.second, true);
300 /* Get a compacted image as we have to feed it to wxWidgets */
301 _display_frame = input->scale_and_convert_to_rgb (_film_size, 0, _film->scaler(), false);
303 if (old_size != _display_frame->size()) {
304 _clear_required = true;
309 /* Our output is already cropped by the decoder, so we need to account for that
310 when working out the scale that we are applying.
313 Size const cropped_size = _film->cropped_size (_film->video_size ());
315 Rect tx = subtitle_transformed_area (
316 float (_film_size.width) / cropped_size.width,
317 float (_film_size.height) / cropped_size.height,
318 _raw_sub->area(), _film->subtitle_offset(), _film->subtitle_scale()
321 _display_sub.reset (new RGBPlusAlphaImage (_raw_sub->image()->scale (tx.size(), _film->scaler(), false)));
322 _display_sub_position = tx.position();
323 _display_sub_position.x += _display_frame_x;
325 _display_sub.reset ();
330 FilmViewer::calculate_sizes ()
332 if (!_film || !_player) {
336 Format const * format = _film->format ();
338 float const panel_ratio = static_cast<float> (_panel_size.width) / _panel_size.height;
339 float const film_ratio = format ? format->container_ratio_as_float () : 1.78;
341 if (panel_ratio < film_ratio) {
342 /* panel is less widscreen than the film; clamp width */
343 _out_size.width = _panel_size.width;
344 _out_size.height = _out_size.width / film_ratio;
346 /* panel is more widescreen than the film; clamp height */
347 _out_size.height = _panel_size.height;
348 _out_size.width = _out_size.height * film_ratio;
351 /* Work out how much padding there is in terms of our display; this will be the x position
352 of our _display_frame.
354 _display_frame_x = 0;
356 _display_frame_x = static_cast<float> (format->dcp_padding (_film)) * _out_size.width / format->dcp_size().width;
359 _film_size = _out_size;
360 _film_size.width -= _display_frame_x * 2;
362 /* Catch silly values */
363 if (_out_size.width < 64) {
364 _out_size.width = 64;
369 FilmViewer::play_clicked (wxCommandEvent &)
375 FilmViewer::check_play_state ()
381 if (_play_button->GetValue()) {
382 _timer.Start (1000 / _film->video_frame_rate());
389 FilmViewer::process_video (shared_ptr<Image> image, bool, shared_ptr<Subtitle> sub)
399 /** Get a new _raw_frame from the decoder and then do
403 FilmViewer::get_frame ()
405 /* Clear our raw frame in case we don't get a new one */
409 _display_frame.reset ();
415 while (!_got_frame) {
416 if (_player->pass ()) {
417 /* We didn't get a frame before the decoder gave up,
418 so clear our display frame.
420 _display_frame.reset ();
424 } catch (DecodeError& e) {
425 _play_button->SetValue (false);
427 error_dialog (this, wxString::Format (_("Could not decode video for view (%s)"), std_to_wx(e.what()).data()));
432 FilmViewer::active_jobs_changed (bool a)
435 list<shared_ptr<Job> > jobs = JobManager::instance()->get ();
436 list<shared_ptr<Job> >::iterator i = jobs.begin ();
437 while (i != jobs.end() && boost::dynamic_pointer_cast<ExamineContentJob> (*i) == 0) {
441 if (i == jobs.end() || (*i)->finished()) {
442 /* no examine content job running, so we're ok to use the viewer */
447 _slider->Enable (!a);
448 _play_button->Enable (!a);