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.
21 #include <boost/shared_ptr.hpp>
22 #include "ab_transcoder.h"
24 #include "video_decoder.h"
25 #include "audio_decoder.h"
30 #include "decoder_factory.h"
32 #include "delay_line.h"
37 /** @file src/ab_transcoder.cc
38 * @brief A transcoder which uses one Film for the left half of the screen, and a different one
39 * for the right half (to facilitate A/B comparisons of settings)
43 using boost::shared_ptr;
44 using boost::dynamic_pointer_cast;
46 /** @param a Film to use for the left half of the screen.
47 * @param b Film to use for the right half of the screen.
48 * @param o Decoder options.
49 * @param j Job that we are associated with.
50 * @param e Encoder to use.
53 ABTranscoder::ABTranscoder (
54 shared_ptr<Film> a, shared_ptr<Film> b, DecodeOptions o, Job* j, shared_ptr<Encoder> e)
59 , _combiner (new Combiner (a->log()))
61 _da = decoder_factory (_film_a, o);
62 _db = decoder_factory (_film_b, o);
64 shared_ptr<AudioStream> st = _film_a->audio_stream();
66 _matcher.reset (new Matcher (_film_a->log(), st->sample_rate(), _film_a->source_frame_rate()));
68 _delay_line.reset (new DelayLine (_film_a->log(), _film_a->audio_delay() / 1000.0f));
69 _gain.reset (new Gain (_film_a->log(), _film_a->audio_gain()));
71 int const sr = st ? st->sample_rate() : 0;
72 int const trim_start = _film_a->trim_type() == Film::ENCODE ? _film_a->trim_start() : 0;
73 int const trim_end = _film_a->trim_type() == Film::ENCODE ? _film_a->trim_end() : 0;
74 _trimmer.reset (new Trimmer (
75 _film_a->log(), trim_start, trim_end, _film_a->length().get(),
76 sr, _film_a->source_frame_rate(), _film_a->dcp_frame_rate()
79 /* Set up the decoder to use the film's set streams */
80 _da.video->set_subtitle_stream (_film_a->subtitle_stream ());
81 _db.video->set_subtitle_stream (_film_a->subtitle_stream ());
82 if (_film_a->audio_stream ()) {
83 _da.audio->set_audio_stream (_film_a->audio_stream ());
86 _da.video->Video.connect (bind (&Combiner::process_video, _combiner, _1, _2, _3, _4));
87 _db.video->Video.connect (bind (&Combiner::process_video_b, _combiner, _1, _2, _3, _4));
89 _combiner->connect_video (_delay_line);
91 _delay_line->connect_video (_matcher);
92 _matcher->connect_video (_trimmer);
94 _delay_line->connect_video (_trimmer);
96 _trimmer->connect_video (_encoder);
98 _da.audio->connect_audio (_delay_line);
100 _delay_line->connect_audio (_matcher);
101 _matcher->connect_audio (_gain);
103 _delay_line->connect_audio (_gain);
105 _gain->connect_audio (_trimmer);
106 _trimmer->connect_audio (_encoder);
112 _encoder->process_begin ();
114 bool done[3] = { false, false, false };
117 done[0] = _da.video->pass ();
118 done[1] = _db.video->pass ();
120 if (!done[2] && _da.audio && dynamic_pointer_cast<Decoder> (_da.audio) != dynamic_pointer_cast<Decoder> (_da.video)) {
121 done[2] = _da.audio->pass ();
127 _da.video->set_progress (_job);
130 if (done[0] && done[1] && done[2]) {
136 _delay_line->process_end ();
139 _matcher->process_end ();
142 _gain->process_end ();
144 _encoder->process_end ();