Merge master.

[dcpomatic.git] / src / lib / audio_mapping.cc

diff --git a/src/lib/audio_mapping.cc b/src/lib/audio_mapping.cc
index 3fc423e101a891074eada7261bff77d622311cba..e86e2e2ac6820499cd551ddaed17ffe8e7f30019 100644 (file)
--- a/src/lib/audio_mapping.cc
+++ b/src/lib/audio_mapping.cc
@@ -1,5 +1,5 @@
 /*
-    Copyright (C) 2013 Carl Hetherington <cth@carlh.net>
+    Copyright (C) 2013-2014 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
@@ -17,87 +17,130 @@
 
 */
 
+#include <libxml++/libxml++.h>
+#include <libcxml/cxml.h>
+#include <dcp/raw_convert.h>
 #include "audio_mapping.h"
-
-using std::map;
-using boost::optional;
-
-AutomaticAudioMapping::AutomaticAudioMapping (int c)
-       : _source_channels (c)
+#include "util.h"
+#include "md5_digester.h"
+
+using std::list;
+using std::cout;
+using std::make_pair;
+using std::pair;
+using std::string;
+using std::min;
+using boost::shared_ptr;
+using boost::dynamic_pointer_cast;
+using dcp::raw_convert;
+
+AudioMapping::AudioMapping ()
+       : _content_channels (0)
 {
 
 }
 
-optional<libdcp::Channel>
-AutomaticAudioMapping::source_to_dcp (int c) const
+/** Create an empty AudioMapping for a given channel count.
+ *  @param channels Number of channels.
+ */
+AudioMapping::AudioMapping (int channels)
 {
-       if (c >= _source_channels) {
-               return optional<libdcp::Channel> ();
-       }
+       setup (channels);
+}
 
-       if (_source_channels == 1) {
-               /* mono sources to centre */
-               return libdcp::CENTRE;
-       }
+void
+AudioMapping::setup (int c)
+{
+       _content_channels = c;
        
-       return static_cast<libdcp::Channel> (c);
+       _gain.resize (_content_channels);
+       for (int i = 0; i < _content_channels; ++i) {
+               _gain[i].resize (MAX_DCP_AUDIO_CHANNELS);
+       }
 }
 
-optional<int>
-AutomaticAudioMapping::dcp_to_source (libdcp::Channel c) const
+void
+AudioMapping::make_default ()
 {
-       if (_source_channels == 1) {
-               if (c == libdcp::CENTRE) {
-                       return 0;
-               } else {
-                       return optional<int> ();
+       for (int i = 0; i < _content_channels; ++i) {
+               for (int j = 0; j < MAX_DCP_AUDIO_CHANNELS; ++j) {
+                       _gain[i][j] = 0;
                }
        }
 
-       if (static_cast<int> (c) >= _source_channels) {
-               return optional<int> ();
+       if (_content_channels == 1) {
+               /* Mono -> Centre */
+               set (0, dcp::CENTRE, 1);
+       } else {
+               /* 1:1 mapping */
+               for (int i = 0; i < min (_content_channels, MAX_DCP_AUDIO_CHANNELS); ++i) {
+                       set (i, static_cast<dcp::Channel> (i), 1);
+               }
        }
-       
-       return static_cast<int> (c);
 }
 
-int
-AutomaticAudioMapping::dcp_channels () const
+AudioMapping::AudioMapping (cxml::ConstNodePtr node, int state_version)
 {
-       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;
+       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<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) {
+                       set (
+                               (*i)->number_attribute<int> ("Content"),
+                               static_cast<dcp::Channel> ((*i)->number_attribute<int> ("DCP")),
+                               raw_convert<float> ((*i)->content ())
+                               );
+               }
        }
+}
 
-       return _source_channels;
+void
+AudioMapping::set (int c, dcp::Channel d, float g)
+{
+       _gain[c][d] = g;
 }
 
-optional<int>
-ConfiguredAudioMapping::dcp_to_source (libdcp::Channel c) const
+float
+AudioMapping::get (int c, dcp::Channel d) const
 {
-       map<int, libdcp::Channel>::const_iterator i = _source_to_dcp.begin ();
-       while (i != _source_to_dcp.end() && i->second != c) {
-               ++i;
-       }
+       return _gain[c][d];
+}
 
-       if (i == _source_to_dcp.end ()) {
-               return boost::none;
+void
+AudioMapping::as_xml (xmlpp::Node* node) const
+{
+       node->add_child ("ContentChannels")->add_child_text (raw_convert<string> (_content_channels));
+
+       for (int c = 0; c < _content_channels; ++c) {
+               for (int d = 0; d < MAX_DCP_AUDIO_CHANNELS; ++d) {
+                       xmlpp::Element* t = node->add_child ("Gain");
+                       t->set_attribute ("Content", raw_convert<string> (c));
+                       t->set_attribute ("DCP", raw_convert<string> (d));
+                       t->add_child_text (raw_convert<string> (get (c, static_cast<dcp::Channel> (d))));
+               }
        }
-
-       return i->first;
 }
 
-optional<libdcp::Channel>
-ConfiguredAudioMapping::source_to_dcp (int c) const
+/** @return a string which is unique for a given AudioMapping configuration, for
+ *  differentiation between different AudioMappings.
+ */
+string
+AudioMapping::digest () const
 {
-       map<int, libdcp::Channel>::const_iterator i = _source_to_dcp.find (c);
-       if (i == _source_to_dcp.end ()) {
-               return boost::none;
+       MD5Digester digester;
+       digester.add (_content_channels);
+       for (int i = 0; i < _content_channels; ++i) {
+               for (int j = 0; j < MAX_DCP_AUDIO_CHANNELS; ++j) {
+                       digester.add (_gain[i][j]);
+               }
        }
 
-       return i->second;
+       return digester.get ();
 }
-
-