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, wxT ("Play")))
55 , _display_frame_x (0)
57 , _clear_required (false)
59 _v_sizer = new wxBoxSizer (wxVERTICAL);
62 _v_sizer->Add (_panel, 1, wxEXPAND);
64 wxBoxSizer* h_sizer = new wxBoxSizer (wxHORIZONTAL);
65 h_sizer->Add (_play_button, 0, wxEXPAND);
66 h_sizer->Add (_slider, 1, wxEXPAND);
68 _v_sizer->Add (h_sizer, 0, wxEXPAND | wxALL, 6);
70 _panel->Connect (wxID_ANY, wxEVT_PAINT, wxPaintEventHandler (FilmViewer::paint_panel), 0, this);
71 _panel->Connect (wxID_ANY, wxEVT_SIZE, wxSizeEventHandler (FilmViewer::panel_sized), 0, this);
72 _slider->Connect (wxID_ANY, wxEVT_SCROLL_THUMBTRACK, wxScrollEventHandler (FilmViewer::slider_moved), 0, this);
73 _slider->Connect (wxID_ANY, wxEVT_SCROLL_PAGEUP, wxScrollEventHandler (FilmViewer::slider_moved), 0, this);
74 _slider->Connect (wxID_ANY, wxEVT_SCROLL_PAGEDOWN, wxScrollEventHandler (FilmViewer::slider_moved), 0, this);
75 _play_button->Connect (wxID_ANY, wxEVT_COMMAND_TOGGLEBUTTON_CLICKED, wxCommandEventHandler (FilmViewer::play_clicked), 0, this);
76 _timer.Connect (wxID_ANY, wxEVT_TIMER, wxTimerEventHandler (FilmViewer::timer), 0, this);
80 JobManager::instance()->ActiveJobsChanged.connect (
81 bind (&FilmViewer::active_jobs_changed, this, _1)
86 FilmViewer::film_changed (Film::Property p)
96 o.decode_audio = false;
97 o.decode_subtitles = true;
99 _decoders = decoder_factory (_film, o);
100 if (_decoders.video == 0) {
103 _decoders.video->Video.connect (bind (&FilmViewer::process_video, this, _1, _2, _3));
104 _decoders.video->OutputChanged.connect (boost::bind (&FilmViewer::decoder_changed, this));
105 _decoders.video->set_subtitle_stream (_film->subtitle_stream());
109 _slider->Show (_film->content_type() == VIDEO);
110 _play_button->Show (_film->content_type() == VIDEO);
114 case Film::WITH_SUBTITLES:
115 case Film::SUBTITLE_OFFSET:
116 case Film::SUBTITLE_SCALE:
121 case Film::SUBTITLE_STREAM:
122 if (_decoders.video) {
123 _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::FORMAT);
148 film_changed (Film::WITH_SUBTITLES);
149 film_changed (Film::SUBTITLE_OFFSET);
150 film_changed (Film::SUBTITLE_SCALE);
151 film_changed (Film::SUBTITLE_STREAM);
155 FilmViewer::decoder_changed ()
157 if (_decoders.video == 0 || _decoders.video->seek_to_last ()) {
167 FilmViewer::timer (wxTimerEvent &)
169 if (!_film || !_decoders.video) {
178 if (_film->length()) {
179 int const new_slider_position = 4096 * _decoders.video->last_source_time() / (_film->length().get() / _film->frames_per_second());
180 if (new_slider_position != _slider->GetValue()) {
181 _slider->SetValue (new_slider_position);
188 FilmViewer::paint_panel (wxPaintEvent &)
190 wxPaintDC dc (_panel);
192 if (_clear_required) {
194 _clear_required = false;
197 if (!_display_frame || !_film || !_out_size.width || !_out_size.height) {
202 if (_display_frame_x) {
203 dc.SetPen(*wxBLACK_PEN);
204 dc.SetBrush(*wxBLACK_BRUSH);
205 dc.DrawRectangle (0, 0, _display_frame_x, _film_size.height);
206 dc.DrawRectangle (_display_frame_x + _film_size.width, 0, _display_frame_x, _film_size.height);
209 wxImage frame (_film_size.width, _film_size.height, _display_frame->data()[0], true);
210 wxBitmap frame_bitmap (frame);
211 dc.DrawBitmap (frame_bitmap, _display_frame_x, 0);
213 if (_film->with_subtitles() && _display_sub) {
214 wxImage sub (_display_sub->size().width, _display_sub->size().height, _display_sub->data()[0], _display_sub->alpha(), true);
215 wxBitmap sub_bitmap (sub);
216 dc.DrawBitmap (sub_bitmap, _display_sub_position.x, _display_sub_position.y);
222 FilmViewer::slider_moved (wxScrollEvent &)
224 if (!_film || !_film->length() || !_decoders.video) {
228 if (_decoders.video->seek (_slider->GetValue() * _film->length().get() / (4096 * _film->frames_per_second()))) {
238 FilmViewer::panel_sized (wxSizeEvent& ev)
240 _panel_size.width = ev.GetSize().GetWidth();
241 _panel_size.height = ev.GetSize().GetHeight();
247 FilmViewer::update_from_raw ()
260 FilmViewer::raw_to_display ()
262 if (!_raw_frame || _out_size.width < 64 || _out_size.height < 64 || !_film) {
266 libdcp::Size old_size;
267 if (_display_frame) {
268 old_size = _display_frame->size();
271 boost::shared_ptr<Image> input = _raw_frame;
273 pair<string, string> const s = Filter::ffmpeg_strings (_film->filters());
274 if (!s.second.empty ()) {
275 input = input->post_process (s.second, true);
278 /* Get a compacted image as we have to feed it to wxWidgets */
279 _display_frame = input->scale_and_convert_to_rgb (_film_size, 0, _film->scaler(), false);
281 if (old_size != _display_frame->size()) {
282 _clear_required = true;
287 /* Our output is already cropped by the decoder, so we need to account for that
288 when working out the scale that we are applying.
291 Size const cropped_size = _film->cropped_size (_film->size ());
293 Rect tx = subtitle_transformed_area (
294 float (_film_size.width) / cropped_size.width,
295 float (_film_size.height) / cropped_size.height,
296 _raw_sub->area(), _film->subtitle_offset(), _film->subtitle_scale()
299 _display_sub.reset (new RGBPlusAlphaImage (_raw_sub->image()->scale (tx.size(), _film->scaler(), false)));
300 _display_sub_position = tx.position();
301 _display_sub_position.x += _display_frame_x;
303 _display_sub.reset ();
308 FilmViewer::calculate_sizes ()
314 Format const * format = _film->format ();
316 float const panel_ratio = static_cast<float> (_panel_size.width) / _panel_size.height;
317 float const film_ratio = format ? format->container_ratio_as_float () : 1.78;
319 if (panel_ratio < film_ratio) {
320 /* panel is less widscreen than the film; clamp width */
321 _out_size.width = _panel_size.width;
322 _out_size.height = _out_size.width / film_ratio;
324 /* panel is more widescreen than the film; clamp height */
325 _out_size.height = _panel_size.height;
326 _out_size.width = _out_size.height * film_ratio;
329 /* Work out how much padding there is in terms of our display; this will be the x position
330 of our _display_frame.
332 _display_frame_x = 0;
334 _display_frame_x = static_cast<float> (format->dcp_padding (_film)) * _out_size.width / format->dcp_size().width;
337 _film_size = _out_size;
338 _film_size.width -= _display_frame_x * 2;
340 /* Catch silly values */
341 if (_out_size.width < 64) {
342 _out_size.width = 64;
347 FilmViewer::play_clicked (wxCommandEvent &)
353 FilmViewer::check_play_state ()
359 if (_play_button->GetValue()) {
360 _timer.Start (1000 / _film->frames_per_second());
367 FilmViewer::process_video (shared_ptr<Image> image, bool, shared_ptr<Subtitle> sub)
378 FilmViewer::get_frame ()
380 /* Clear our raw frame in case we don't get a new one */
383 if (_decoders.video == 0) {
384 _display_frame.reset ();
390 while (!_got_frame) {
391 if (_decoders.video->pass ()) {
392 /* We didn't get a frame before the decoder gave up,
393 so clear our display frame.
395 _display_frame.reset ();
399 } catch (DecodeError& e) {
400 _play_button->SetValue (false);
402 error_dialog (this, wxString::Format (_("Could not decode video for view (%s)"), e.what()));
407 FilmViewer::active_jobs_changed (bool a)
410 list<shared_ptr<Job> > jobs = JobManager::instance()->get ();
411 list<shared_ptr<Job> >::iterator i = jobs.begin ();
412 while (i != jobs.end() && boost::dynamic_pointer_cast<ExamineContentJob> (*i) == 0) {
416 if (i == jobs.end() || (*i)->finished()) {
417 /* no examine content job running, so we're ok to use the viewer */
422 _slider->Enable (!a);
423 _play_button->Enable (!a);