2 Copyright (C) 2012-2015 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/transcoder.cc
21 * @brief A class which takes a Film and some Options, then uses those to transcode the film.
23 * A decoder is selected according to the content type, and the encoder can be specified
24 * as a parameter to the constructor.
27 #include "transcoder.h"
30 #include "video_decoder.h"
31 #include "audio_decoder.h"
35 #include "compose.hpp"
36 #include "subtitle_content.h"
37 #include <boost/signals2.hpp>
38 #include <boost/foreach.hpp>
44 using boost::shared_ptr;
45 using boost::weak_ptr;
46 using boost::dynamic_pointer_cast;
48 /** Construct a transcoder.
49 * @param f Film that we are transcoding.
50 * @param j Job that this transcoder is being used in.
52 Transcoder::Transcoder (shared_ptr<const Film> film, shared_ptr<Job> j)
54 , _player (new Player (film, film->playlist ()))
55 , _writer (new Writer (film, j))
56 , _encoder (new Encoder (film, j, _writer))
67 DCPTime const frame = DCPTime::from_frames (1, _film->video_frame_rate ());
68 DCPTime const length = _film->length ();
70 int burnt_subtitles = 0;
71 int non_burnt_subtitles = 0;
72 BOOST_FOREACH (shared_ptr<const Content> c, _film->content ()) {
73 shared_ptr<const SubtitleContent> sc = dynamic_pointer_cast<const SubtitleContent> (c);
74 if (sc && sc->use_subtitles()) {
75 if (sc->burn_subtitles()) {
78 ++non_burnt_subtitles;
83 if (non_burnt_subtitles) {
84 _writer->write (_player->get_subtitle_fonts ());
87 for (DCPTime t; t < length; t += frame) {
88 list<shared_ptr<PlayerVideo> > v = _player->get_video (t, true);
89 for (list<shared_ptr<PlayerVideo> >::const_iterator i = v.begin(); i != v.end(); ++i) {
90 _encoder->enqueue (*i);
92 _writer->write (_player->get_audio (t, frame, true));
93 if (non_burnt_subtitles) {
94 _writer->write (_player->get_subtitles (t, frame, true, false));
104 Transcoder::current_encoding_rate () const
106 return _encoder->current_encoding_rate ();
110 Transcoder::video_frames_out () const
112 return _encoder->video_frames_out ();