/*
- Copyright (C) 2013 Carl Hetherington <cth@carlh.net>
+ Copyright (C) 2013-2015 Carl Hetherington <cth@carlh.net>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
*/
-#include <boost/lexical_cast.hpp>
-#include <libxml++/libxml++.h>
-#include <libcxml/cxml.h>
#include "audio_mapping.h"
#include "util.h"
+#include "md5_digester.h"
+#include "raw_convert.h"
+#include <libcxml/cxml.h>
+#include <libxml++/libxml++.h>
+#include <iostream>
using std::list;
using std::cout;
using std::make_pair;
using std::pair;
using std::string;
+using std::min;
+using std::vector;
+using std::abs;
using boost::shared_ptr;
-using boost::lexical_cast;
using boost::dynamic_pointer_cast;
AudioMapping::AudioMapping ()
- : _content_channels (0)
+ : _input_channels (0)
+ , _output_channels (0)
{
}
-/** Create a default AudioMapping for a given channel count.
- * @param c Number of channels.
+/** Create an empty AudioMapping.
+ * @param input_channels Number of input channels.
+ * @param output_channels Number of output channels.
*/
-AudioMapping::AudioMapping (int c)
+AudioMapping::AudioMapping (int input_channels, int output_channels)
{
- setup (c);
+ setup (input_channels, output_channels);
}
void
-AudioMapping::setup (int c)
+AudioMapping::setup (int input_channels, int output_channels)
{
- _content_channels = c;
-
- _gain.resize (_content_channels);
- for (int i = 0; i < _content_channels; ++i) {
- _gain[i].resize (MAX_AUDIO_CHANNELS);
+ _input_channels = input_channels;
+ _output_channels = output_channels;
+
+ _gain.resize (_input_channels);
+ for (int i = 0; i < _input_channels; ++i) {
+ _gain[i].resize (_output_channels);
}
+
+ make_zero ();
}
void
-AudioMapping::make_default ()
+AudioMapping::make_zero ()
{
- for (int i = 0; i < _content_channels; ++i) {
- for (int j = 0; j < MAX_AUDIO_CHANNELS; ++j) {
+ for (int i = 0; i < _input_channels; ++i) {
+ for (int j = 0; j < _output_channels; ++j) {
_gain[i][j] = 0;
}
}
-
- if (_content_channels == 1) {
- /* Mono -> Centre */
- set (0, dcp::CENTRE, 1);
- } else {
- /* 1:1 mapping */
- for (int i = 0; i < _content_channels; ++i) {
- set (i, static_cast<dcp::Channel> (i), 1);
- }
- }
}
-AudioMapping::AudioMapping (shared_ptr<const cxml::Node> node, int state_version)
+AudioMapping::AudioMapping (cxml::ConstNodePtr node, int state_version)
{
- setup (node->number_child<int> ("ContentChannels"));
+ if (state_version < 32) {
+ setup (node->number_child<int> ("ContentChannels"), MAX_DCP_AUDIO_CHANNELS);
+ } else {
+ setup (node->number_child<int> ("InputChannels"), node->number_child<int> ("OutputChannels"));
+ }
if (state_version <= 5) {
/* Old-style: on/off mapping */
} else {
list<cxml::NodePtr> const c = node->node_children ("Gain");
for (list<cxml::NodePtr>::const_iterator i = c.begin(); i != c.end(); ++i) {
- set (
- (*i)->number_attribute<int> ("Content"),
- static_cast<dcp::Channel> ((*i)->number_attribute<int> ("DCP")),
- lexical_cast<float> ((*i)->content ())
- );
+ if (state_version < 32) {
+ set (
+ (*i)->number_attribute<int> ("Content"),
+ static_cast<dcp::Channel> ((*i)->number_attribute<int> ("DCP")),
+ raw_convert<float> ((*i)->content ())
+ );
+ } else {
+ set (
+ (*i)->number_attribute<int> ("Input"),
+ (*i)->number_attribute<int> ("Output"),
+ raw_convert<float> ((*i)->content ())
+ );
+ }
}
}
}
void
-AudioMapping::set (int c, dcp::Channel d, float g)
+AudioMapping::set (int input_channel, int output_channel, float g)
{
- _gain[c][d] = g;
+ _gain[input_channel][output_channel] = g;
}
float
-AudioMapping::get (int c, dcp::Channel d) const
+AudioMapping::get (int input_channel, int output_channel) const
{
- return _gain[c][d];
+ DCPOMATIC_ASSERT (input_channel < int (_gain.size()));
+ DCPOMATIC_ASSERT (output_channel < int (_gain[0].size()));
+ return _gain[input_channel][output_channel];
}
void
AudioMapping::as_xml (xmlpp::Node* node) const
{
- node->add_child ("ContentChannels")->add_child_text (lexical_cast<string> (_content_channels));
+ node->add_child ("InputChannels")->add_child_text (raw_convert<string> (_input_channels));
+ node->add_child ("OutputChannels")->add_child_text (raw_convert<string> (_output_channels));
- for (int c = 0; c < _content_channels; ++c) {
- for (int d = 0; d < MAX_AUDIO_CHANNELS; ++d) {
+ for (int c = 0; c < _input_channels; ++c) {
+ for (int d = 0; d < _output_channels; ++d) {
xmlpp::Element* t = node->add_child ("Gain");
- t->set_attribute ("Content", lexical_cast<string> (c));
- t->set_attribute ("DCP", lexical_cast<string> (d));
- t->add_child_text (lexical_cast<string> (get (c, static_cast<dcp::Channel> (d))));
+ t->set_attribute ("Input", raw_convert<string> (c));
+ t->set_attribute ("Output", raw_convert<string> (d));
+ t->add_child_text (raw_convert<string> (get (c, d)));
+ }
+ }
+}
+
+/** @return a string which is unique for a given AudioMapping configuration, for
+ * differentiation between different AudioMappings.
+ */
+string
+AudioMapping::digest () const
+{
+ MD5Digester digester;
+ digester.add (_input_channels);
+ digester.add (_output_channels);
+ for (int i = 0; i < _input_channels; ++i) {
+ for (int j = 0; j < _output_channels; ++j) {
+ digester.add (_gain[i][j]);
+ }
+ }
+
+ return digester.get ();
+}
+
+list<int>
+AudioMapping::mapped_output_channels () const
+{
+ static float const minus_96_db = 0.000015849;
+
+ list<int> mapped;
+
+ for (vector<vector<float> >::const_iterator i = _gain.begin(); i != _gain.end(); ++i) {
+ for (size_t j = 0; j < i->size(); ++j) {
+ if (abs ((*i)[j]) > minus_96_db) {
+ mapped.push_back (j);
+ }
+ }
+ }
+
+ mapped.sort ();
+ mapped.unique ();
+
+ return mapped;
+}
+
+void
+AudioMapping::unmap_all ()
+{
+ for (vector<vector<float> >::iterator i = _gain.begin(); i != _gain.end(); ++i) {
+ for (vector<float>::iterator j = i->begin(); j != i->end(); ++j) {
+ *j = 0;
}
}
}