1 /* -*- c-basic-offset: 8; default-tab-width: 8; -*- */
4 Copyright (C) 2012 Carl Hetherington <cth@carlh.net>
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
22 #include "video_decoder.h"
32 using boost::shared_ptr;
33 using boost::optional;
35 VideoDecoder::VideoDecoder (shared_ptr<const Film> f, shared_ptr<const VideoContent> c)
39 , _last_content_time (0)
44 /** Called by subclasses to tell the world that some video data is ready.
45 * We find a subtitle then emit it for listeners.
46 * @param image frame to emit.
47 * @param t Time of the frame within the source.
50 VideoDecoder::emit_video (shared_ptr<Image> image, bool same, Time t)
52 shared_ptr<Subtitle> sub;
53 if (_timed_subtitle && _timed_subtitle->displayed_at (t)) {
54 sub = _timed_subtitle->subtitle ();
57 TIMING (N_("Decoder emits %1"), _video_frame);
58 Video (image, same, sub, t);
61 _last_content_time = t;
64 /** Set up the current subtitle. This will be put onto frames that
65 * fit within its time specification. s may be 0 to say that there
66 * is no current subtitle.
67 * @param s New current subtitle, or 0.
70 VideoDecoder::emit_subtitle (shared_ptr<TimedSubtitle> s)
74 if (_timed_subtitle) {
75 Position const p = _timed_subtitle->subtitle()->position ();
76 _timed_subtitle->subtitle()->set_position (Position (p.x - _video_content->crop().left, p.y - _video_content->crop().top));
81 VideoDecoder::set_progress (Job* j) const
85 if (_film->length()) {
86 j->set_progress (float (_video_frame) / _film->time_to_video_frames (_film->length()));