2 Copyright (C) 2013-2021 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_mapping.h"
22 #include "audio_processor.h"
26 #include <dcp/raw_convert.h>
27 #include <libcxml/cxml.h>
28 DCPOMATIC_DISABLE_WARNINGS
29 #include <libxml++/libxml++.h>
30 DCPOMATIC_ENABLE_WARNINGS
31 #include <boost/regex.hpp>
42 using std::shared_ptr;
43 using std::dynamic_pointer_cast;
44 using boost::optional;
45 using dcp::raw_convert;
47 AudioMapping::AudioMapping ()
49 , _output_channels (0)
54 /** Create an empty AudioMapping.
55 * @param input_channels Number of input channels.
56 * @param output_channels Number of output channels.
58 AudioMapping::AudioMapping (int input_channels, int output_channels)
60 setup (input_channels, output_channels);
64 AudioMapping::setup (int input_channels, int output_channels)
66 _input_channels = input_channels;
67 _output_channels = output_channels;
69 _gain.resize (_input_channels);
70 for (int i = 0; i < _input_channels; ++i) {
71 _gain[i].resize (_output_channels);
78 AudioMapping::make_zero ()
80 for (int i = 0; i < _input_channels; ++i) {
81 for (int j = 0; j < _output_channels; ++j) {
89 ChannelRegex (string regex_, int channel_)
99 AudioMapping::make_default (AudioProcessor const * processor, optional<boost::filesystem::path> filename)
101 static ChannelRegex const regex[] = {
102 ChannelRegex(".*[\\._-]L[\\._-].*", 0),
103 ChannelRegex(".*[\\._-]R[\\._-].*", 1),
104 ChannelRegex(".*[\\._-]C[\\._-].*", 2),
105 ChannelRegex(".*[\\._-]Lfe[\\._-].*", 3),
106 ChannelRegex(".*[\\._-]LFE[\\._-].*", 3),
107 ChannelRegex(".*[\\._-]Lss[\\._-].*", 4),
108 ChannelRegex(".*[\\._-]Lsr[\\._-].*", 6),
109 ChannelRegex(".*[\\._-]Ls[\\._-].*", 4),
110 ChannelRegex(".*[\\._-]Rss[\\._-].*", 5),
111 ChannelRegex(".*[\\._-]Rsr[\\._-].*", 7),
112 ChannelRegex(".*[\\._-]Rs[\\._-].*", 5),
115 static int const regexes = sizeof(regex) / sizeof(*regex);
118 processor->make_audio_mapping_default (*this);
121 if (input_channels() == 1) {
122 bool guessed = false;
124 /* See if we can guess where this stream should go */
126 for (int i = 0; i < regexes; ++i) {
127 boost::regex e (regex[i].regex, boost::regex::icase);
128 if (boost::regex_match(filename->string(), e) && regex[i].channel < output_channels()) {
129 set (0, regex[i].channel, 1);
136 /* If we have no idea, just put it on centre */
137 set (0, static_cast<int>(dcp::Channel::CENTRE), 1);
141 for (int i = 0; i < min (input_channels(), output_channels()); ++i) {
148 AudioMapping::AudioMapping (cxml::ConstNodePtr node, int state_version)
150 if (state_version < 32) {
151 setup (node->number_child<int> ("ContentChannels"), MAX_DCP_AUDIO_CHANNELS);
153 setup (node->number_child<int> ("InputChannels"), node->number_child<int> ("OutputChannels"));
156 if (state_version <= 5) {
157 /* Old-style: on/off mapping */
158 for (auto i: node->node_children ("Map")) {
159 set (i->number_child<int>("ContentIndex"), i->number_child<int>("DCP"), 1);
162 for (auto i: node->node_children("Gain")) {
163 if (state_version < 32) {
165 i->number_attribute<int>("Content"),
166 i->number_attribute<int>("DCP"),
167 raw_convert<float>(i->content())
171 i->number_attribute<int>("Input"),
172 i->number_attribute<int>("Output"),
173 raw_convert<float>(i->content())
182 AudioMapping::set (dcp::Channel input_channel, int output_channel, float g)
184 set (static_cast<int>(input_channel), output_channel, g);
189 AudioMapping::set (int input_channel, dcp::Channel output_channel, float g)
191 set (input_channel, static_cast<int>(output_channel), g);
196 AudioMapping::set (int input_channel, int output_channel, float g)
198 DCPOMATIC_ASSERT (input_channel < int(_gain.size()));
199 DCPOMATIC_ASSERT (output_channel < int(_gain[0].size()));
200 _gain[input_channel][output_channel] = g;
205 AudioMapping::get (int input_channel, dcp::Channel output_channel) const
207 return get (input_channel, static_cast<int>(output_channel));
212 AudioMapping::get (int input_channel, int output_channel) const
214 DCPOMATIC_ASSERT (input_channel < int (_gain.size()));
215 DCPOMATIC_ASSERT (output_channel < int (_gain[0].size()));
216 return _gain[input_channel][output_channel];
220 AudioMapping::as_xml (xmlpp::Node* node) const
222 node->add_child ("InputChannels")->add_child_text (raw_convert<string> (_input_channels));
223 node->add_child ("OutputChannels")->add_child_text (raw_convert<string> (_output_channels));
225 for (int c = 0; c < _input_channels; ++c) {
226 for (int d = 0; d < _output_channels; ++d) {
227 auto t = node->add_child ("Gain");
228 t->set_attribute ("Input", raw_convert<string> (c));
229 t->set_attribute ("Output", raw_convert<string> (d));
230 t->add_child_text (raw_convert<string> (get (c, d)));
235 /** @return a string which is unique for a given AudioMapping configuration, for
236 * differentiation between different AudioMappings.
239 AudioMapping::digest () const
242 digester.add (_input_channels);
243 digester.add (_output_channels);
244 for (int i = 0; i < _input_channels; ++i) {
245 for (int j = 0; j < _output_channels; ++j) {
246 digester.add (_gain[i][j]);
250 return digester.get ();
254 AudioMapping::mapped_output_channels () const
256 static float const minus_96_db = 0.000015849;
260 for (auto const& i: _gain) {
261 for (auto j: dcp::used_audio_channels()) {
262 if (abs(i[static_cast<int>(j)]) > minus_96_db) {
263 mapped.push_back (static_cast<int>(j));
275 AudioMapping::unmap_all ()
277 for (auto& i: _gain) {