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"
39 using boost::shared_ptr;
41 /** Construct a transcoder using a Decoder that we create and a supplied Encoder.
42 * @param f Film that we are transcoding.
44 * @param j Job that we are running under, or 0.
45 * @param e Encoder to use.
47 Transcoder::Transcoder (shared_ptr<Film> f, shared_ptr<const Options> o, Job* j, shared_ptr<Encoder> e)
50 , _decoder (decoder_factory (f, o, j))
54 if (f->audio_stream()) {
55 AudioStream st = f->audio_stream().get();
56 _matcher.reset (new Matcher (f->log(), st.sample_rate(), f->frames_per_second()));
57 _delay_line.reset (new DelayLine (f->log(), st.channels(), f->audio_delay() * st.sample_rate() / 1000));
58 _gain.reset (new Gain (f->log(), f->audio_gain()));
61 /* Set up the decoder to use the film's set streams */
62 _decoder->set_audio_stream (f->audio_stream ());
63 _decoder->set_subtitle_stream (f->subtitle_stream ());
66 _decoder->connect_video (_matcher);
67 _matcher->connect_video (_encoder);
69 _decoder->connect_video (_encoder);
72 if (_matcher && _delay_line) {
73 _decoder->connect_audio (_delay_line);
74 _delay_line->connect_audio (_matcher);
75 _matcher->connect_audio (_gain);
76 _gain->connect_audio (_encoder);
80 /** Run the decoder, passing its output to the encoder, until the decoder
81 * has no more data to present.
86 _encoder->process_begin ();
90 /* process_end() is important as the decoder may have worker
91 threads that need to be cleaned up.
93 _encoder->process_end ();
97 _encoder->process_end ();