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"
31 #include "decoder_factory.h"
34 #include "delay_line.h"
37 #include "video_decoder.h"
38 #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 o Decode options.
48 * @param j Job that we are running under, or 0.
49 * @param e Encoder to use.
51 Transcoder::Transcoder (shared_ptr<Film> f, DecodeOptions o, shared_ptr<Job> j)
53 , _playlist (f->playlist ())
54 , _encoder (new Encoder (f, _playlist))
56 if (_playlist->has_audio ()) {
57 _matcher.reset (new Matcher (f->log(), _playlist->audio_frame_rate(), _playlist->video_frame_rate()));
58 _delay_line.reset (new DelayLine (f->log(), _playlist->audio_channels(), f->audio_delay() * _playlist->audio_frame_rate() / 1000));
59 _gain.reset (new Gain (f->log(), f->audio_gain()));
63 _playlist->connect_video (_matcher);
64 _matcher->connect_video (_encoder);
66 _playlist->connect_video (_encoder);
69 if (_matcher && _delay_line && _playlist->has_audio ()) {
70 _playlist->connect_audio (_delay_line);
71 _delay_line->connect_audio (_matcher);
72 _matcher->connect_audio (_gain);
73 _gain->connect_audio (_encoder);
80 _encoder->process_begin ();
83 if (_playlist->pass ()) {
86 _playlist->set_progress (_job);
90 _encoder->process_end ();
95 _delay_line->process_end ();
98 _matcher->process_end ();
101 _gain->process_end ();
103 _encoder->process_end ();