Try to fix lack of subs in the viewer after they are turned on.
[dcpomatic.git] / src / lib / transcoder.cc
1 /*
2     Copyright (C) 2012 Carl Hetherington <cth@carlh.net>
3
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.
8
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.
13
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.
17
18 */
19
20 /** @file  src/transcoder.cc
21  *  @brief A class which takes a Film and some Options, then uses those to transcode the film.
22  *
23  *  A decoder is selected according to the content type, and the encoder can be specified
24  *  as a parameter to the constructor.
25  */
26
27 #include <iostream>
28 #include <boost/signals2.hpp>
29 #include "transcoder.h"
30 #include "encoder.h"
31 #include "film.h"
32 #include "matcher.h"
33 #include "delay_line.h"
34 #include "gain.h"
35 #include "video_decoder.h"
36 #include "audio_decoder.h"
37 #include "player.h"
38
39 using std::string;
40 using boost::shared_ptr;
41 using boost::dynamic_pointer_cast;
42
43 /** Construct a transcoder using a Decoder that we create and a supplied Encoder.
44  *  @param f Film that we are transcoding.
45  *  @param j Job that we are running under, or 0.
46  *  @param e Encoder to use.
47  */
48 Transcoder::Transcoder (shared_ptr<Film> f, shared_ptr<Job> j)
49         : _job (j)
50         , _player (f->player ())
51         , _encoder (new Encoder (f))
52 {
53         if (f->has_audio ()) {
54                 _matcher.reset (new Matcher (f->log(), f->audio_frame_rate(), f->video_frame_rate()));
55                 _delay_line.reset (new DelayLine (f->log(), f->audio_channels(), f->audio_delay() * f->audio_frame_rate() / 1000));
56                 _gain.reset (new Gain (f->log(), f->audio_gain()));
57         }
58
59         if (!f->with_subtitles ()) {
60                 _player->disable_subtitles ();
61         }
62
63         if (_matcher) {
64                 _player->connect_video (_matcher);
65                 _matcher->connect_video (_encoder);
66         } else {
67                 _player->connect_video (_encoder);
68         }
69         
70         if (_matcher && _delay_line && f->has_audio ()) {
71                 _player->connect_audio (_delay_line);
72                 _delay_line->connect_audio (_matcher);
73                 _matcher->connect_audio (_gain);
74                 _gain->connect_audio (_encoder);
75         }
76 }
77
78 void
79 Transcoder::go ()
80 {
81         _encoder->process_begin ();
82         try {
83                 while (1) {
84                         if (_player->pass ()) {
85                                 break;
86                         }
87                         _player->set_progress (_job);
88                 }
89                 
90         } catch (...) {
91                 _encoder->process_end ();
92                 throw;
93         }
94         
95         if (_delay_line) {
96                 _delay_line->process_end ();
97         }
98         if (_matcher) {
99                 _matcher->process_end ();
100         }
101         if (_gain) {
102                 _gain->process_end ();
103         }
104         _encoder->process_end ();
105 }
106
107 float
108 Transcoder::current_encoding_rate () const
109 {
110         return _encoder->current_encoding_rate ();
111 }
112
113 int
114 Transcoder::video_frames_out () const
115 {
116         return _encoder->video_frames_out ();
117 }