2 Copyright (C) 2013-2014 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 <dcp/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"
29 #include "audio_processor.h"
36 using boost::shared_ptr;
37 using boost::dynamic_pointer_cast;
38 using dcp::raw_convert;
40 int const AudioContentProperty::AUDIO_CHANNELS = 200;
41 int const AudioContentProperty::AUDIO_LENGTH = 201;
42 int const AudioContentProperty::AUDIO_FRAME_RATE = 202;
43 int const AudioContentProperty::AUDIO_GAIN = 203;
44 int const AudioContentProperty::AUDIO_DELAY = 204;
45 int const AudioContentProperty::AUDIO_MAPPING = 205;
46 int const AudioContentProperty::AUDIO_PROCESSOR = 206;
48 AudioContent::AudioContent (shared_ptr<const Film> f)
51 , _audio_delay (Config::instance()->default_audio_delay ())
52 , _audio_processor (0)
57 AudioContent::AudioContent (shared_ptr<const Film> f, DCPTime s)
60 , _audio_delay (Config::instance()->default_audio_delay ())
61 , _audio_processor (0)
66 AudioContent::AudioContent (shared_ptr<const Film> f, boost::filesystem::path p)
69 , _audio_delay (Config::instance()->default_audio_delay ())
70 , _audio_processor (0)
75 AudioContent::AudioContent (shared_ptr<const Film> f, cxml::ConstNodePtr node)
77 , _audio_processor (0)
79 _audio_gain = node->number_child<float> ("AudioGain");
80 _audio_delay = node->number_child<int> ("AudioDelay");
81 if (node->optional_string_child ("AudioProcessor")) {
82 _audio_processor = AudioProcessor::from_id (node->string_child ("AudioProcessor"));
86 AudioContent::AudioContent (shared_ptr<const Film> f, vector<shared_ptr<Content> > c)
89 shared_ptr<AudioContent> ref = dynamic_pointer_cast<AudioContent> (c[0]);
92 for (size_t i = 0; i < c.size(); ++i) {
93 shared_ptr<AudioContent> ac = dynamic_pointer_cast<AudioContent> (c[i]);
95 if (ac->audio_gain() != ref->audio_gain()) {
96 throw JoinError (_("Content to be joined must have the same audio gain."));
99 if (ac->audio_delay() != ref->audio_delay()) {
100 throw JoinError (_("Content to be joined must have the same audio delay."));
104 _audio_gain = ref->audio_gain ();
105 _audio_delay = ref->audio_delay ();
106 _audio_processor = ref->audio_processor ();
110 AudioContent::as_xml (xmlpp::Node* node) const
112 boost::mutex::scoped_lock lm (_mutex);
113 node->add_child("AudioGain")->add_child_text (raw_convert<string> (_audio_gain));
114 node->add_child("AudioDelay")->add_child_text (raw_convert<string> (_audio_delay));
115 if (_audio_processor) {
116 node->add_child("AudioProcessor")->add_child_text (_audio_processor->id ());
122 AudioContent::set_audio_gain (double g)
125 boost::mutex::scoped_lock lm (_mutex);
129 signal_changed (AudioContentProperty::AUDIO_GAIN);
133 AudioContent::set_audio_delay (int d)
136 boost::mutex::scoped_lock lm (_mutex);
140 signal_changed (AudioContentProperty::AUDIO_DELAY);
144 AudioContent::set_audio_processor (AudioProcessor const * p)
147 boost::mutex::scoped_lock lm (_mutex);
148 _audio_processor = p;
151 /* The channel count might have changed, so reset the mapping */
152 AudioMapping m (processed_audio_channels ());
154 set_audio_mapping (m);
156 signal_changed (AudioContentProperty::AUDIO_PROCESSOR);
159 boost::signals2::connection
160 AudioContent::analyse_audio (boost::function<void()> finished)
162 shared_ptr<const Film> film = _film.lock ();
165 shared_ptr<AnalyseAudioJob> job (new AnalyseAudioJob (film, dynamic_pointer_cast<AudioContent> (shared_from_this())));
166 boost::signals2::connection c = job->Finished.connect (finished);
167 JobManager::instance()->add (job);
172 boost::filesystem::path
173 AudioContent::audio_analysis_path () const
175 shared_ptr<const Film> film = _film.lock ();
177 return boost::filesystem::path ();
180 boost::filesystem::path p = film->audio_analysis_dir ();
181 p /= digest() + "_" + audio_mapping().digest();
186 AudioContent::technical_summary () const
188 return String::compose (
189 "audio: channels %1, length %2, content rate %3, resampled rate %4",
191 audio_length().seconds(),
193 resampled_audio_frame_rate()
198 AudioContent::set_audio_mapping (AudioMapping)
200 signal_changed (AudioContentProperty::AUDIO_MAPPING);
203 /** @return the frame rate that this content should be resampled to in order
204 * that it is in sync with the active video content at its start time.
207 AudioContent::resampled_audio_frame_rate () const
209 shared_ptr<const Film> film = _film.lock ();
212 /* Resample to a DCI-approved sample rate */
213 double t = dcp_audio_frame_rate (audio_frame_rate ());
215 FrameRateChange frc = film->active_frame_rate_change (position ());
217 /* Compensate if the DCP is being run at a different frame rate
218 to the source; that is, if the video is run such that it will
219 look different in the DCP compared to the source (slower or faster).
222 if (frc.change_speed) {
230 AudioContent::processed_audio_channels () const
232 if (!audio_processor ()) {
233 return audio_channels ();
236 return audio_processor()->out_channels (audio_channels ());