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 "subtitle_content.h"
36 #include <boost/signals2.hpp>
37 #include <boost/foreach.hpp>
43 using boost::shared_ptr;
44 using boost::weak_ptr;
45 using boost::dynamic_pointer_cast;
47 /** Construct a transcoder.
48 * @param f Film that we are transcoding.
49 * @param j Job that this transcoder is being used in.
51 Transcoder::Transcoder (shared_ptr<const Film> film, shared_ptr<Job> j)
53 , _player (new Player (film, film->playlist ()))
54 , _writer (new Writer (film, j))
55 , _encoder (new Encoder (film, j, _writer))
66 DCPTime const frame = DCPTime::from_frames (1, _film->video_frame_rate ());
67 DCPTime const length = _film->length ();
69 int burnt_subtitles = 0;
70 int non_burnt_subtitles = 0;
71 BOOST_FOREACH (shared_ptr<const Content> c, _film->content ()) {
72 shared_ptr<const SubtitleContent> sc = dynamic_pointer_cast<const SubtitleContent> (c);
73 if (sc && sc->use_subtitles()) {
74 if (sc->burn_subtitles()) {
77 ++non_burnt_subtitles;
82 if (non_burnt_subtitles) {
83 _writer->write (_player->get_subtitle_fonts ());
86 for (DCPTime t; t < length; t += frame) {
87 list<shared_ptr<PlayerVideo> > v = _player->get_video (t, true);
88 for (list<shared_ptr<PlayerVideo> >::const_iterator i = v.begin(); i != v.end(); ++i) {
89 _encoder->enqueue (*i);
91 _writer->write (_player->get_audio (t, frame, true));
92 if (non_burnt_subtitles) {
93 _writer->write (_player->get_subtitles (t, frame, true, false));
103 Transcoder::current_encoding_rate () const
105 return _encoder->current_encoding_rate ();
109 Transcoder::video_frames_out () const
111 return _encoder->video_frames_out ();