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/*
Copyright (C) 2013 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
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <boost/lexical_cast.hpp>
#include <libxml++/libxml++.h>
#include <libcxml/cxml.h>
#include "audio_mapping.h"
#include "util.h"
using std::list;
using std::cout;
using std::make_pair;
using std::pair;
using std::string;
using boost::shared_ptr;
using boost::lexical_cast;
using boost::dynamic_pointer_cast;
AudioMapping::AudioMapping ()
: _content_channels (0)
{
}
/** Create a default AudioMapping for a given channel count.
* @param c Number of channels.
*/
AudioMapping::AudioMapping (int c)
{
setup (c);
}
void
AudioMapping::setup (int c)
{
_content_channels = c;
_gain.resize (_content_channels);
for (int i = 0; i < _content_channels; ++i) {
_gain[i].resize (MAX_AUDIO_CHANNELS);
}
}
void
AudioMapping::make_default ()
{
for (int i = 0; i < _content_channels; ++i) {
for (int j = 0; j < MAX_AUDIO_CHANNELS; ++j) {
_gain[i][j] = 0;
}
}
if (_content_channels == 1) {
/* Mono -> Centre */
set (0, libdcp::CENTRE, 1);
} else {
/* 1:1 mapping */
for (int i = 0; i < _content_channels; ++i) {
set (i, static_cast<libdcp::Channel> (i), 1);
}
}
}
AudioMapping::AudioMapping (shared_ptr<const cxml::Node> node, int state_version)
{
setup (node->number_child<int> ("ContentChannels"));
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<libdcp::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) {
set (
(*i)->number_attribute<int> ("Content"),
static_cast<libdcp::Channel> ((*i)->number_attribute<int> ("DCP")),
lexical_cast<float> ((*i)->content ())
);
}
}
}
void
AudioMapping::set (int c, libdcp::Channel d, float g)
{
_gain[c][d] = g;
}
float
AudioMapping::get (int c, libdcp::Channel d) const
{
return _gain[c][d];
}
void
AudioMapping::as_xml (xmlpp::Node* node) const
{
node->add_child ("ContentChannels")->add_child_text (lexical_cast<string> (_content_channels));
for (int c = 0; c < _content_channels; ++c) {
for (int d = 0; d < MAX_AUDIO_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<libdcp::Channel> (d))));
}
}
}
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