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/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.
28 #include <boost/signals2.hpp>
29 #include "transcoder.h"
33 #include "delay_line.h"
35 #include "video_decoder.h"
36 #include "audio_decoder.h"
41 using boost::shared_ptr;
42 using boost::dynamic_pointer_cast;
44 /** Construct a transcoder using a Decoder that we create and a supplied Encoder.
45 * @param f Film that we are transcoding.
46 * @param j Job that we are running under, or 0.
47 * @param e Encoder to use.
49 Transcoder::Transcoder (shared_ptr<Film> f, shared_ptr<Job> j)
51 , _player (f->player ())
52 , _encoder (new Encoder (f))
54 _matcher.reset (new Matcher (f->log(), f->audio_frame_rate(), f->video_frame_rate()));
55 _delay_line.reset (new DelayLine (f->log(), f->audio_delay() * f->audio_frame_rate() / 1000));
56 _gain.reset (new Gain (f->log(), f->audio_gain()));
58 int const trim_start = f->trim_type() == Film::ENCODE ? f->trim_start() : 0;
59 int const trim_end = f->trim_type() == Film::ENCODE ? f->trim_end() : 0;
60 _trimmer.reset (new Trimmer (
61 f->log(), trim_start, trim_end, f->content_length(),
62 f->audio_frame_rate(), f->video_frame_rate(), f->dcp_frame_rate()
65 if (!f->with_subtitles ()) {
66 _player->disable_subtitles ();
69 _player->connect_video (_delay_line);
70 _delay_line->connect_video (_matcher);
71 _matcher->connect_video (_trimmer);
72 _trimmer->connect_video (_encoder);
74 _player->connect_audio (_delay_line);
75 _delay_line->connect_audio (_matcher);
76 _matcher->connect_audio (_gain);
77 _gain->connect_audio (_trimmer);
78 _trimmer->connect_audio (_encoder);
84 _encoder->process_begin ();
86 if (_player->pass ()) {
89 _player->set_progress (_job);
92 _delay_line->process_end ();
94 _matcher->process_end ();
96 _gain->process_end ();
97 _encoder->process_end ();
101 Transcoder::current_encoding_rate () const
103 return _encoder->current_encoding_rate ();
107 Transcoder::video_frames_out () const
109 return _encoder->video_frames_out ();