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"
42 using boost::shared_ptr;
43 using boost::dynamic_pointer_cast;
45 /** Construct a transcoder using a Decoder that we create and a supplied Encoder.
46 * @param f Film that we are transcoding.
47 * @param j Job that we are running under, or 0.
48 * @param e Encoder to use.
50 Transcoder::Transcoder (shared_ptr<Film> f, shared_ptr<Job> j)
52 , _player (f->player ())
53 , _encoder (new Encoder (f, j))
55 _matcher.reset (new Matcher (f->log(), f->audio_frame_rate(), f->video_frame_rate()));
56 _delay_line.reset (new DelayLine (f->log(), f->audio_delay() * f->audio_frame_rate() / 1000));
57 _gain.reset (new Gain (f->log(), f->audio_gain()));
59 int const trim_start = f->trim_type() == Film::ENCODE ? f->trim_start() : 0;
60 int const trim_end = f->trim_type() == Film::ENCODE ? f->trim_end() : 0;
61 _trimmer.reset (new Trimmer (
62 f->log(), trim_start, trim_end, f->content_length(),
63 f->audio_frame_rate(), f->video_frame_rate(), f->dcp_frame_rate()
66 if (!f->with_subtitles ()) {
67 _player->disable_subtitles ();
70 _player->connect_video (_delay_line);
71 _delay_line->connect_video (_matcher);
72 _matcher->connect_video (_trimmer);
73 _trimmer->connect_video (_encoder);
75 _player->connect_audio (_delay_line);
76 _delay_line->connect_audio (_matcher);
77 _matcher->connect_audio (_gain);
78 _gain->connect_audio (_trimmer);
79 _trimmer->connect_audio (_encoder);
85 _encoder->process_begin ();
87 while (!_player->pass ()) {}
89 _delay_line->process_end ();
91 _matcher->process_end ();
93 _gain->process_end ();
94 _encoder->process_end ();
98 Transcoder::current_encoding_rate () const
100 return _encoder->current_encoding_rate ();
104 Transcoder::video_frames_out () const
106 return _encoder->video_frames_out ();