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.
48 * @param j Job that we are running under, or 0.
49 * @param e Encoder to use.
51 Transcoder::Transcoder (shared_ptr<Film> f, shared_ptr<const Options> o, Job* j, shared_ptr<Encoder> e)
56 , _decoders (decoder_factory (f, o, j))
60 if (f->audio_stream()) {
61 shared_ptr<AudioStream> st = f->audio_stream();
62 _matcher.reset (new Matcher (f->log(), st->sample_rate(), f->frames_per_second()));
63 _delay_line.reset (new DelayLine (f->log(), st->channels(), f->audio_delay() * st->sample_rate() / 1000));
64 _gain.reset (new Gain (f->log(), f->audio_gain()));
67 /* Set up the decoder to use the film's set streams */
68 _decoders.first->set_subtitle_stream (f->subtitle_stream ());
69 if (_decoders.second) {
70 _decoders.second->set_audio_stream (f->audio_stream ());
74 _decoders.first->connect_video (_matcher);
75 _matcher->connect_video (_encoder);
77 _decoders.first->connect_video (_encoder);
80 if (_matcher && _delay_line && _decoders.second) {
81 _decoders.second->connect_audio (_delay_line);
82 _delay_line->connect_audio (_matcher);
83 _matcher->connect_audio (_gain);
84 _gain->connect_audio (_encoder);
88 /** Run the decoder, passing its output to the encoder, until the decoder
89 * has no more data to present.
94 _encoder->process_begin ();
98 bool done[2] = { false, false };
102 done[0] = _decoders.first->pass ();
103 _decoders.first->set_progress ();
106 if (!done[1] && _decoders.second && dynamic_pointer_cast<Decoder> (_decoders.second) != dynamic_pointer_cast<Decoder> (_decoders.first)) {
107 done[1] = _decoders.second->pass ();
112 if (done[0] && done[1]) {
118 _encoder->process_end ();
123 _delay_line->process_end ();
126 _matcher->process_end ();
129 _gain->process_end ();
131 _encoder->process_end ();