/*
- 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 "audio_mapping.h"
+#include "util.h"
+#include "md5_digester.h"
+#include "raw_convert.h"
+#include <libcxml/cxml.h>
+#include <libxml++/libxml++.h>
+
+using std::list;
+using std::cout;
+using std::make_pair;
+using std::pair;
+using std::string;
+using std::min;
+using std::vector;
+using boost::shared_ptr;
+using boost::dynamic_pointer_cast;
+
+AudioMapping::AudioMapping ()
+ : _input_channels (0)
+ , _output_channels (0)
+{
-using std::map;
-using boost::optional;
+}
-AutomaticAudioMapping::AutomaticAudioMapping (int c)
- : _source_channels (c)
+/** Create an empty AudioMapping.
+ * @param input_channels Number of input channels.
+ * @param output_channels Number of output channels.
+ */
+AudioMapping::AudioMapping (int input_channels, int output_channels)
{
-
+ setup (input_channels, output_channels);
}
-optional<libdcp::Channel>
-AutomaticAudioMapping::source_to_dcp (int c) const
+void
+AudioMapping::setup (int input_channels, int output_channels)
{
- if (c >= _source_channels) {
- return optional<libdcp::Channel> ();
+ _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);
}
- if (_source_channels == 1) {
- /* mono sources to centre */
- return libdcp::CENTRE;
- }
-
- return static_cast<libdcp::Channel> (c);
+ make_zero ();
}
-optional<int>
-AutomaticAudioMapping::dcp_to_source (libdcp::Channel c) const
+void
+AudioMapping::make_zero ()
{
- if (_source_channels == 1) {
- if (c == libdcp::CENTRE) {
- return 0;
- } else {
- return optional<int> ();
+ for (int i = 0; i < _input_channels; ++i) {
+ for (int j = 0; j < _output_channels; ++j) {
+ _gain[i][j] = 0;
}
}
+}
- if (static_cast<int> (c) >= _source_channels) {
- return optional<int> ();
+AudioMapping::AudioMapping (cxml::ConstNodePtr node, int state_version)
+{
+ 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 */
+ list<cxml::NodePtr> const c = node->node_children ("Map");
+ for (list<cxml::NodePtr>::const_iterator i = c.begin(); i != c.end(); ++i) {
+ set ((*i)->number_child<int> ("ContentIndex"), static_cast<dcp::Channel> ((*i)->number_child<int> ("DCP")), 1);
+ }
+ } else {
+ list<cxml::NodePtr> const c = node->node_children ("Gain");
+ for (list<cxml::NodePtr>::const_iterator i = c.begin(); i != c.end(); ++i) {
+ 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 ())
+ );
+ }
+ }
}
-
- return static_cast<int> (c);
}
-int
-AutomaticAudioMapping::dcp_channels () const
+void
+AudioMapping::set (int input_channel, int output_channel, float g)
{
- if (_source_channels == 1) {
- /* The source is mono, so to put the mono channel into
- the centre we need to generate a 5.1 soundtrack.
- */
- return 6;
- }
+ _gain[input_channel][output_channel] = g;
+}
- return _source_channels;
+float
+AudioMapping::get (int input_channel, int output_channel) const
+{
+ return _gain[input_channel][output_channel];
}
-optional<int>
-ConfiguredAudioMapping::dcp_to_source (libdcp::Channel c) const
+void
+AudioMapping::as_xml (xmlpp::Node* node) const
{
- map<int, libdcp::Channel>::const_iterator i = _source_to_dcp.begin ();
- while (i != _source_to_dcp.end() && i->second != c) {
- ++i;
+ 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 < _input_channels; ++c) {
+ for (int d = 0; d < _output_channels; ++d) {
+ xmlpp::Element* t = node->add_child ("Gain");
+ 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)));
+ }
}
+}
- if (i == _source_to_dcp.end ()) {
- return boost::none;
+/** @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 i->first;
+ return digester.get ();
}
-optional<libdcp::Channel>
-ConfiguredAudioMapping::source_to_dcp (int c) const
+list<int>
+AudioMapping::mapped_output_channels () const
{
- map<int, libdcp::Channel>::const_iterator i = _source_to_dcp.find (c);
- if (i == _source_to_dcp.end ()) {
- return boost::none;
+ 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);
+ }
+ }
}
- return i->second;
+ 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;
+ }
+ }
+}
projects / dcpomatic.git / blobdiff