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 "lib/filter.h"
38 #include "film_viewer.h"
40 #include "video_decoder.h"
47 using boost::shared_ptr;
50 FilmViewer::FilmViewer (shared_ptr<Film> f, wxWindow* p)
52 , _panel (new wxPanel (this))
53 , _slider (new wxSlider (this, wxID_ANY, 0, 0, 4096))
54 , _play_button (new wxToggleButton (this, wxID_ANY, _("Play")))
55 , _display_frame_x (0)
57 , _clear_required (false)
59 _panel->SetDoubleBuffered (true);
60 #if wxMAJOR_VERSION == 2 && wxMINOR_VERSION >= 9
61 _panel->SetBackgroundStyle (wxBG_STYLE_PAINT);
64 _v_sizer = new wxBoxSizer (wxVERTICAL);
67 _v_sizer->Add (_panel, 1, wxEXPAND);
69 wxBoxSizer* h_sizer = new wxBoxSizer (wxHORIZONTAL);
70 h_sizer->Add (_play_button, 0, wxEXPAND);
71 h_sizer->Add (_slider, 1, wxEXPAND);
73 _v_sizer->Add (h_sizer, 0, wxEXPAND | wxALL, 6);
75 _panel->Connect (wxID_ANY, wxEVT_PAINT, wxPaintEventHandler (FilmViewer::paint_panel), 0, this);
76 _panel->Connect (wxID_ANY, wxEVT_SIZE, wxSizeEventHandler (FilmViewer::panel_sized), 0, this);
77 _slider->Connect (wxID_ANY, wxEVT_SCROLL_THUMBTRACK, wxScrollEventHandler (FilmViewer::slider_moved), 0, this);
78 _slider->Connect (wxID_ANY, wxEVT_SCROLL_PAGEUP, wxScrollEventHandler (FilmViewer::slider_moved), 0, this);
79 _slider->Connect (wxID_ANY, wxEVT_SCROLL_PAGEDOWN, wxScrollEventHandler (FilmViewer::slider_moved), 0, this);
80 _play_button->Connect (wxID_ANY, wxEVT_COMMAND_TOGGLEBUTTON_CLICKED, wxCommandEventHandler (FilmViewer::play_clicked), 0, this);
81 _timer.Connect (wxID_ANY, wxEVT_TIMER, wxTimerEventHandler (FilmViewer::timer), 0, this);
85 JobManager::instance()->ActiveJobsChanged.connect (
86 bind (&FilmViewer::active_jobs_changed, this, _1)
91 FilmViewer::film_changed (Film::Property p)
101 o.decode_audio = false;
102 o.decode_subtitles = true;
103 o.video_sync = false;
106 _decoders = decoder_factory (_film, o);
107 } catch (StringError& e) {
108 error_dialog (this, wxString::Format (_("Could not open content file (%s)"), e.what()));
112 if (_decoders.video == 0) {
115 _decoders.video->Video.connect (bind (&FilmViewer::process_video, this, _1, _2, _3));
116 _decoders.video->OutputChanged.connect (boost::bind (&FilmViewer::decoder_changed, this));
117 _decoders.video->set_subtitle_stream (_film->subtitle_stream());
121 _slider->Show (_film->content_type() == VIDEO);
122 _play_button->Show (_film->content_type() == VIDEO);
126 case Film::WITH_SUBTITLES:
127 case Film::SUBTITLE_OFFSET:
128 case Film::SUBTITLE_SCALE:
133 case Film::SUBTITLE_STREAM:
134 if (_decoders.video) {
135 _decoders.video->set_subtitle_stream (_film->subtitle_stream ());
144 FilmViewer::set_film (shared_ptr<Film> f)
156 _film->Changed.connect (boost::bind (&FilmViewer::film_changed, this, _1));
158 film_changed (Film::CONTENT);
159 film_changed (Film::FORMAT);
160 film_changed (Film::WITH_SUBTITLES);
161 film_changed (Film::SUBTITLE_OFFSET);
162 film_changed (Film::SUBTITLE_SCALE);
163 film_changed (Film::SUBTITLE_STREAM);
167 FilmViewer::decoder_changed ()
169 if (_decoders.video == 0 || _decoders.video->seek_to_last ()) {
179 FilmViewer::timer (wxTimerEvent &)
181 if (!_film || !_decoders.video) {
190 if (_film->length()) {
191 int const new_slider_position = 4096 * _decoders.video->last_source_time() / (_film->length().get() / _film->frames_per_second());
192 if (new_slider_position != _slider->GetValue()) {
193 _slider->SetValue (new_slider_position);
200 FilmViewer::paint_panel (wxPaintEvent &)
202 wxPaintDC dc (_panel);
204 if (_clear_required) {
206 _clear_required = false;
209 if (!_display_frame || !_film || !_out_size.width || !_out_size.height) {
214 if (_display_frame_x) {
215 dc.SetPen(*wxBLACK_PEN);
216 dc.SetBrush(*wxBLACK_BRUSH);
217 dc.DrawRectangle (0, 0, _display_frame_x, _film_size.height);
218 dc.DrawRectangle (_display_frame_x + _film_size.width, 0, _display_frame_x, _film_size.height);
221 wxImage frame (_film_size.width, _film_size.height, _display_frame->data()[0], true);
222 wxBitmap frame_bitmap (frame);
223 dc.DrawBitmap (frame_bitmap, _display_frame_x, 0);
225 if (_film->with_subtitles() && _display_sub) {
226 wxImage sub (_display_sub->size().width, _display_sub->size().height, _display_sub->data()[0], _display_sub->alpha(), true);
227 wxBitmap sub_bitmap (sub);
228 dc.DrawBitmap (sub_bitmap, _display_sub_position.x, _display_sub_position.y);
234 FilmViewer::slider_moved (wxScrollEvent &)
236 if (!_film || !_film->length() || !_decoders.video) {
240 if (_decoders.video->seek (_slider->GetValue() * _film->length().get() / (4096 * _film->frames_per_second()))) {
250 FilmViewer::panel_sized (wxSizeEvent& ev)
252 _panel_size.width = ev.GetSize().GetWidth();
253 _panel_size.height = ev.GetSize().GetHeight();
259 FilmViewer::update_from_raw ()
272 FilmViewer::raw_to_display ()
274 if (!_raw_frame || _out_size.width < 64 || _out_size.height < 64 || !_film) {
278 libdcp::Size old_size;
279 if (_display_frame) {
280 old_size = _display_frame->size();
283 boost::shared_ptr<Image> input = _raw_frame;
285 pair<string, string> const s = Filter::ffmpeg_strings (_film->filters());
286 if (!s.second.empty ()) {
287 input = input->post_process (s.second, true);
290 /* Get a compacted image as we have to feed it to wxWidgets */
291 _display_frame = input->scale_and_convert_to_rgb (_film_size, 0, _film->scaler(), false);
293 if (old_size != _display_frame->size()) {
294 _clear_required = true;
299 /* Our output is already cropped by the decoder, so we need to account for that
300 when working out the scale that we are applying.
303 Size const cropped_size = _film->cropped_size (_film->size ());
305 Rect tx = subtitle_transformed_area (
306 float (_film_size.width) / cropped_size.width,
307 float (_film_size.height) / cropped_size.height,
308 _raw_sub->area(), _film->subtitle_offset(), _film->subtitle_scale()
311 _display_sub.reset (new RGBPlusAlphaImage (_raw_sub->image()->scale (tx.size(), _film->scaler(), false)));
312 _display_sub_position = tx.position();
313 _display_sub_position.x += _display_frame_x;
315 _display_sub.reset ();
320 FilmViewer::calculate_sizes ()
326 Format const * format = _film->format ();
328 float const panel_ratio = static_cast<float> (_panel_size.width) / _panel_size.height;
329 float const film_ratio = format ? format->container_ratio_as_float () : 1.78;
331 if (panel_ratio < film_ratio) {
332 /* panel is less widscreen than the film; clamp width */
333 _out_size.width = _panel_size.width;
334 _out_size.height = _out_size.width / film_ratio;
336 /* panel is more widescreen than the film; clamp height */
337 _out_size.height = _panel_size.height;
338 _out_size.width = _out_size.height * film_ratio;
341 /* Work out how much padding there is in terms of our display; this will be the x position
342 of our _display_frame.
344 _display_frame_x = 0;
346 _display_frame_x = static_cast<float> (format->dcp_padding (_film)) * _out_size.width / format->dcp_size().width;
349 _film_size = _out_size;
350 _film_size.width -= _display_frame_x * 2;
352 /* Catch silly values */
353 if (_out_size.width < 64) {
354 _out_size.width = 64;
359 FilmViewer::play_clicked (wxCommandEvent &)
365 FilmViewer::check_play_state ()
371 if (_play_button->GetValue()) {
372 _timer.Start (1000 / _film->frames_per_second());
379 FilmViewer::process_video (shared_ptr<Image> image, bool, shared_ptr<Subtitle> sub)
390 FilmViewer::get_frame ()
392 /* Clear our raw frame in case we don't get a new one */
395 if (_decoders.video == 0) {
396 _display_frame.reset ();
402 while (!_got_frame) {
403 if (_decoders.video->pass ()) {
404 /* We didn't get a frame before the decoder gave up,
405 so clear our display frame.
407 _display_frame.reset ();
411 } catch (DecodeError& e) {
412 _play_button->SetValue (false);
414 error_dialog (this, wxString::Format (_("Could not decode video for view (%s)"), e.what()));
419 FilmViewer::active_jobs_changed (bool a)
422 list<shared_ptr<Job> > jobs = JobManager::instance()->get ();
423 list<shared_ptr<Job> >::iterator i = jobs.begin ();
424 while (i != jobs.end() && boost::dynamic_pointer_cast<ExamineContentJob> (*i) == 0) {
428 if (i == jobs.end() || (*i)->finished()) {
429 /* no examine content job running, so we're ok to use the viewer */
434 _slider->Enable (!a);
435 _play_button->Enable (!a);