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/decoder.cc
21 * @brief Parent class for decoders of content.
26 #include <boost/lexical_cast.hpp>
31 #include "exceptions.h"
36 #include "delay_line.h"
38 #include "filter_graph.h"
41 using std::stringstream;
45 using boost::shared_ptr;
46 using boost::optional;
50 * @param j Job that we are running within, or 0
52 Decoder::Decoder (boost::shared_ptr<Film> f, boost::shared_ptr<const Options> o, Job* j)
65 if (_job && !_film->dcp_length()) {
66 _job->set_progress_unknown ();
69 while (pass () == false) {
70 if (_job && _film->dcp_length()) {
71 _job->set_progress (float (_video_frame) / _film->length().get());
76 /** Called by subclasses to tell the world that some video data is ready.
77 * We do some post-processing / filtering then emit it for listeners.
78 * @param frame to decode; caller manages memory.
81 Decoder::emit_video (shared_ptr<Image> image)
83 shared_ptr<Subtitle> sub;
84 if (_timed_subtitle && _timed_subtitle->displayed_at (double (video_frame()) / _film->frames_per_second())) {
85 sub = _timed_subtitle->subtitle ();
92 Decoder::repeat_last_video ()
95 _last_image.reset (new CompactImage (pixel_format(), native_size()));
96 _last_image->make_black ();
99 emit_video (_last_image, _last_subtitle);
103 Decoder::emit_video (shared_ptr<Image> image, shared_ptr<Subtitle> sub)
105 TIMING ("Decoder emits %1", _video_frame);
110 _last_subtitle = sub;
114 Decoder::emit_subtitle (shared_ptr<TimedSubtitle> s)
118 if (_timed_subtitle && _opt->apply_crop) {
119 Position const p = _timed_subtitle->subtitle()->position ();
120 _timed_subtitle->subtitle()->set_position (Position (p.x - _film->crop().left, p.y - _film->crop().top));
125 Decoder::set_audio_stream (optional<AudioStream> s)
131 Decoder::set_subtitle_stream (optional<SubtitleStream> s)
133 _subtitle_stream = s;