2 Copyright (C) 2013 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 #include <libcxml/cxml.h>
21 #include <libdcp/raw_convert.h>
22 #include "audio_content.h"
23 #include "analyse_audio_job.h"
24 #include "job_manager.h"
26 #include "exceptions.h"
28 #include "frame_rate_change.h"
35 using boost::shared_ptr;
36 using boost::dynamic_pointer_cast;
37 using libdcp::raw_convert;
39 int const AudioContentProperty::AUDIO_CHANNELS = 200;
40 int const AudioContentProperty::AUDIO_LENGTH = 201;
41 int const AudioContentProperty::AUDIO_FRAME_RATE = 202;
42 int const AudioContentProperty::AUDIO_GAIN = 203;
43 int const AudioContentProperty::AUDIO_DELAY = 204;
44 int const AudioContentProperty::AUDIO_MAPPING = 205;
46 AudioContent::AudioContent (shared_ptr<const Film> f, Time s)
49 , _audio_delay (Config::instance()->default_audio_delay ())
54 AudioContent::AudioContent (shared_ptr<const Film> f, boost::filesystem::path p)
57 , _audio_delay (Config::instance()->default_audio_delay ())
62 AudioContent::AudioContent (shared_ptr<const Film> f, shared_ptr<const cxml::Node> node)
65 _audio_gain = node->number_child<float> ("AudioGain");
66 _audio_delay = node->number_child<int> ("AudioDelay");
69 AudioContent::AudioContent (shared_ptr<const Film> f, vector<shared_ptr<Content> > c)
72 shared_ptr<AudioContent> ref = dynamic_pointer_cast<AudioContent> (c[0]);
75 for (size_t i = 0; i < c.size(); ++i) {
76 shared_ptr<AudioContent> ac = dynamic_pointer_cast<AudioContent> (c[i]);
78 if (ac->audio_gain() != ref->audio_gain()) {
79 throw JoinError (_("Content to be joined must have the same audio gain."));
82 if (ac->audio_delay() != ref->audio_delay()) {
83 throw JoinError (_("Content to be joined must have the same audio delay."));
87 _audio_gain = ref->audio_gain ();
88 _audio_delay = ref->audio_delay ();
92 AudioContent::as_xml (xmlpp::Node* node) const
94 boost::mutex::scoped_lock lm (_mutex);
95 node->add_child("AudioGain")->add_child_text (raw_convert<string> (_audio_gain));
96 node->add_child("AudioDelay")->add_child_text (raw_convert<string> (_audio_delay));
101 AudioContent::set_audio_gain (double g)
104 boost::mutex::scoped_lock lm (_mutex);
108 signal_changed (AudioContentProperty::AUDIO_GAIN);
112 AudioContent::set_audio_delay (int d)
115 boost::mutex::scoped_lock lm (_mutex);
119 signal_changed (AudioContentProperty::AUDIO_DELAY);
122 boost::signals2::connection
123 AudioContent::analyse_audio (boost::function<void()> finished)
125 shared_ptr<const Film> film = _film.lock ();
128 shared_ptr<AnalyseAudioJob> job (new AnalyseAudioJob (film, dynamic_pointer_cast<AudioContent> (shared_from_this())));
129 boost::signals2::connection c = job->Finished.connect (finished);
130 JobManager::instance()->add (job);
135 boost::filesystem::path
136 AudioContent::audio_analysis_path () const
138 shared_ptr<const Film> film = _film.lock ();
140 return boost::filesystem::path ();
143 boost::filesystem::path p = film->audio_analysis_dir ();
144 p /= digest() + "_" + audio_mapping().digest();
149 AudioContent::technical_summary () const
151 return String::compose ("audio: channels %1, length %2, raw rate %3, out rate %4", audio_channels(), audio_length(), content_audio_frame_rate(), output_audio_frame_rate());
155 AudioContent::output_audio_frame_rate () const
157 shared_ptr<const Film> film = _film.lock ();
160 /* Resample to a DCI-approved sample rate */
161 double t = dcp_audio_frame_rate (content_audio_frame_rate ());
163 FrameRateChange frc = film->active_frame_rate_change (position ());
165 /* Compensate if the DCP is being run at a different frame rate
166 to the source; that is, if the video is run such that it will
167 look different in the DCP compared to the source (slower or faster).
168 skip/repeat doesn't come into effect here.
171 if (frc.change_speed) {