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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"
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)
: _content_channels (c)
{
}
void
AudioMapping::make_default ()
{
if (_content_channels == 1) {
/* Mono -> Centre */
add (0, libdcp::CENTRE);
} else {
/* 1:1 mapping */
for (int i = 0; i < _content_channels; ++i) {
add (i, static_cast<libdcp::Channel> (i));
}
}
}
AudioMapping::AudioMapping (shared_ptr<const cxml::Node> node)
{
_content_channels = node->number_child<int> ("ContentChannels");
list<shared_ptr<cxml::Node> > const c = node->node_children ("Map");
for (list<shared_ptr<cxml::Node> >::const_iterator i = c.begin(); i != c.end(); ++i) {
add ((*i)->number_child<int> ("ContentIndex"), static_cast<libdcp::Channel> ((*i)->number_child<int> ("DCP")));
}
}
void
AudioMapping::add (int c, libdcp::Channel d)
{
_content_to_dcp.push_back (make_pair (c, d));
}
list<int>
AudioMapping::dcp_to_content (libdcp::Channel d) const
{
list<int> c;
for (list<pair<int, libdcp::Channel> >::const_iterator i = _content_to_dcp.begin(); i != _content_to_dcp.end(); ++i) {
if (i->second == d) {
c.push_back (i->first);
}
}
return c;
}
list<libdcp::Channel>
AudioMapping::content_to_dcp (int c) const
{
assert (c < _content_channels);
list<libdcp::Channel> d;
for (list<pair<int, libdcp::Channel> >::const_iterator i = _content_to_dcp.begin(); i != _content_to_dcp.end(); ++i) {
if (i->first == c) {
d.push_back (i->second);
}
}
return d;
}
void
AudioMapping::as_xml (xmlpp::Node* node) const
{
node->add_child ("ContentChannels")->add_child_text (lexical_cast<string> (_content_channels));
for (list<pair<int, libdcp::Channel> >::const_iterator i = _content_to_dcp.begin(); i != _content_to_dcp.end(); ++i) {
xmlpp::Node* t = node->add_child ("Map");
t->add_child ("ContentIndex")->add_child_text (lexical_cast<string> (i->first));
t->add_child ("DCP")->add_child_text (lexical_cast<string> (i->second));
}
}
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