2 Copyright (C) 2013-2015 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 "audio_mapping.h"
22 #include "md5_digester.h"
23 #include "raw_convert.h"
24 #include <libcxml/cxml.h>
25 #include <libxml++/libxml++.h>
34 using boost::shared_ptr;
35 using boost::dynamic_pointer_cast;
37 AudioMapping::AudioMapping ()
38 : _content_channels (0)
43 /** Create an empty AudioMapping for a given channel count.
44 * @param channels Number of channels.
46 AudioMapping::AudioMapping (int channels)
52 AudioMapping::setup (int c)
54 _content_channels = c;
56 _gain.resize (_content_channels);
57 for (int i = 0; i < _content_channels; ++i) {
58 _gain[i].resize (MAX_DCP_AUDIO_CHANNELS);
61 _name.resize (_content_channels);
67 AudioMapping::make_zero ()
69 for (int i = 0; i < _content_channels; ++i) {
70 for (int j = 0; j < MAX_DCP_AUDIO_CHANNELS; ++j) {
77 AudioMapping::make_default ()
81 if (_content_channels == 1) {
83 set (0, dcp::CENTRE, 1);
86 for (int i = 0; i < min (_content_channels, MAX_DCP_AUDIO_CHANNELS); ++i) {
87 set (i, static_cast<dcp::Channel> (i), 1);
92 AudioMapping::AudioMapping (cxml::ConstNodePtr node, int state_version)
94 setup (node->number_child<int> ("ContentChannels"));
96 if (state_version <= 5) {
97 /* Old-style: on/off mapping */
98 list<cxml::NodePtr> const c = node->node_children ("Map");
99 for (list<cxml::NodePtr>::const_iterator i = c.begin(); i != c.end(); ++i) {
100 set ((*i)->number_child<int> ("ContentIndex"), static_cast<dcp::Channel> ((*i)->number_child<int> ("DCP")), 1);
103 list<cxml::NodePtr> const c = node->node_children ("Gain");
104 for (list<cxml::NodePtr>::const_iterator i = c.begin(); i != c.end(); ++i) {
106 (*i)->number_attribute<int> ("Content"),
107 static_cast<dcp::Channel> ((*i)->number_attribute<int> ("DCP")),
108 raw_convert<float> ((*i)->content ())
115 AudioMapping::set (int c, dcp::Channel d, float g)
121 AudioMapping::get (int c, dcp::Channel d) const
127 AudioMapping::as_xml (xmlpp::Node* node) const
129 node->add_child ("ContentChannels")->add_child_text (raw_convert<string> (_content_channels));
131 for (int c = 0; c < _content_channels; ++c) {
132 for (int d = 0; d < MAX_DCP_AUDIO_CHANNELS; ++d) {
133 xmlpp::Element* t = node->add_child ("Gain");
134 t->set_attribute ("Content", raw_convert<string> (c));
135 t->set_attribute ("DCP", raw_convert<string> (d));
136 t->add_child_text (raw_convert<string> (get (c, static_cast<dcp::Channel> (d))));
141 /** @return a string which is unique for a given AudioMapping configuration, for
142 * differentiation between different AudioMappings.
145 AudioMapping::digest () const
147 MD5Digester digester;
148 digester.add (_content_channels);
149 for (int i = 0; i < _content_channels; ++i) {
150 for (int j = 0; j < MAX_DCP_AUDIO_CHANNELS; ++j) {
151 digester.add (_gain[i][j]);
155 return digester.get ();
159 AudioMapping::mapped_dcp_channels () const
161 static float const minus_96_db = 0.000015849;
163 list<dcp::Channel> mapped;
165 for (vector<vector<float> >::const_iterator i = _gain.begin(); i != _gain.end(); ++i) {
166 for (size_t j = 0; j < i->size(); ++j) {
167 if (abs ((*i)[j]) > minus_96_db) {
168 mapped.push_back ((dcp::Channel) j);
180 AudioMapping::unmap_all ()
182 for (vector<vector<float> >::iterator i = _gain.begin(); i != _gain.end(); ++i) {
183 for (vector<float>::iterator j = i->begin(); j != i->end(); ++j) {
190 AudioMapping::set_name (int channel, string name)
192 _name[channel] = name;