2 Copyright (C) 2012-2015 Carl Hetherington <cth@carlh.net>
4 This file is part of DCP-o-matic.
6 DCP-o-matic is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2 of the License, or
9 (at your option) any later version.
11 DCP-o-matic is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with DCP-o-matic. If not, see <http://www.gnu.org/licenses/>.
21 #include "audio_analysis.h"
22 #include "audio_buffers.h"
23 #include "analyse_audio_job.h"
24 #include "audio_content.h"
25 #include "compose.hpp"
30 #include "audio_filter_graph.h"
33 #include <libavutil/channel_layout.h>
34 #ifdef DCPOMATIC_HAVE_EBUR128_PATCHED_FFMPEG
35 #include <libavfilter/f_ebur128.h>
38 #include <boost/foreach.hpp>
48 using boost::shared_ptr;
49 using boost::dynamic_pointer_cast;
51 int const AnalyseAudioJob::_num_points = 1024;
53 AnalyseAudioJob::AnalyseAudioJob (shared_ptr<const Film> film, shared_ptr<const Playlist> playlist)
55 , _playlist (playlist)
57 , _samples_per_point (1)
59 , _sample_peak (new float[film->audio_channels()])
60 , _sample_peak_frame (new Frame[film->audio_channels()])
61 #ifdef DCPOMATIC_HAVE_EBUR128_PATCHED_FFMPEG
62 , _ebur128 (new AudioFilterGraph (film->audio_frame_rate(), film->audio_channels()))
65 #ifdef DCPOMATIC_HAVE_EBUR128_PATCHED_FFMPEG
66 _filters.push_back (new Filter ("ebur128", "ebur128", "audio", "ebur128=peak=true"));
67 _ebur128->setup (_filters);
71 AnalyseAudioJob::~AnalyseAudioJob ()
73 BOOST_FOREACH (Filter const * i, _filters) {
74 delete const_cast<Filter*> (i);
77 delete[] _sample_peak;
78 delete[] _sample_peak_frame;
82 AnalyseAudioJob::name () const
84 return _("Analyse audio");
88 AnalyseAudioJob::json_name () const
90 return N_("analyse_audio");
94 AnalyseAudioJob::run ()
96 shared_ptr<Player> player (new Player (_film, _playlist));
97 player->set_ignore_video ();
99 player->set_play_referenced ();
101 DCPTime const start = _playlist->start().get_value_or (DCPTime ());
102 DCPTime const length = _playlist->length ();
104 Frame const len = DCPTime (length - start).frames_round (_film->audio_frame_rate());
105 _samples_per_point = max (int64_t (1), len / _num_points);
108 _current = new AudioPoint[_film->audio_channels ()];
109 _analysis.reset (new AudioAnalysis (_film->audio_channels ()));
111 bool has_any_audio = false;
112 BOOST_FOREACH (shared_ptr<Content> c, _playlist->content ()) {
114 has_any_audio = true;
120 DCPTime const block = DCPTime::from_seconds (1.0 / 8);
121 for (DCPTime t = start; t < length; t += block) {
122 shared_ptr<const AudioBuffers> audio = player->get_audio (t, block, false);
123 #ifdef DCPOMATIC_HAVE_EBUR128_PATCHED_FFMPEG
124 if (Config::instance()->analyse_ebur128 ()) {
125 _ebur128->process (audio);
129 set_progress ((t.seconds() - start.seconds()) / (length.seconds() - start.seconds()));
133 vector<AudioAnalysis::PeakTime> sample_peak;
134 for (int i = 0; i < _film->audio_channels(); ++i) {
135 sample_peak.push_back (
136 AudioAnalysis::PeakTime (_sample_peak[i], DCPTime::from_frames (_sample_peak_frame[i], _film->audio_frame_rate ()))
139 _analysis->set_sample_peak (sample_peak);
141 #ifdef DCPOMATIC_HAVE_EBUR128_PATCHED_FFMPEG
142 if (Config::instance()->analyse_ebur128 ()) {
143 void* eb = _ebur128->get("Parsed_ebur128_0")->priv;
144 vector<float> true_peak;
145 for (int i = 0; i < _film->audio_channels(); ++i) {
146 true_peak.push_back (av_ebur128_get_true_peaks(eb)[i]);
148 _analysis->set_true_peak (true_peak);
149 _analysis->set_integrated_loudness (av_ebur128_get_integrated_loudness(eb));
150 _analysis->set_loudness_range (av_ebur128_get_loudness_range(eb));
154 if (_playlist->content().size() == 1) {
155 /* If there was only one piece of content in this analysis we may later need to know what its
156 gain was when we analysed it.
158 shared_ptr<const AudioContent> ac = _playlist->content().front()->audio;
159 DCPOMATIC_ASSERT (ac);
160 _analysis->set_analysis_gain (ac->gain ());
163 _analysis->write (_film->audio_analysis_path (_playlist));
166 set_state (FINISHED_OK);
170 AnalyseAudioJob::analyse (shared_ptr<const AudioBuffers> b)
172 int const frames = b->frames ();
173 int const channels = b->channels ();
175 for (int j = 0; j < channels; ++j) {
176 float* data = b->data(j);
177 for (int i = 0; i < frames; ++i) {
179 float as = fabsf (s);
181 /* We may struggle to serialise and recover inf or -inf, so prevent such
182 values by replacing with this (140dB down) */
185 _current[j][AudioPoint::RMS] += pow (s, 2);
186 _current[j][AudioPoint::PEAK] = max (_current[j][AudioPoint::PEAK], as);
188 if (as > _sample_peak[j]) {
189 _sample_peak[j] = as;
190 _sample_peak_frame[j] = _done + i;
193 if (((_done + i) % _samples_per_point) == 0) {
194 _current[j][AudioPoint::RMS] = sqrt (_current[j][AudioPoint::RMS] / _samples_per_point);
195 _analysis->add_point (j, _current[j]);
196 _current[j] = AudioPoint ();