Merge master.

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

diff --git a/src/lib/audio_mapping.cc b/src/lib/audio_mapping.cc
index 301d44fa665f0840f60cdd30956352ec3f1d76b0..b3757c5f1be9bd2fefc2a38199215201cde2cf11 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
@@ -17,11 +17,12 @@
 
 */
 
-#include <boost/lexical_cast.hpp>
 #include <libxml++/libxml++.h>
 #include <libcxml/cxml.h>
+#include <dcp/raw_convert.h>
 #include "audio_mapping.h"
 #include "util.h"
+#include "md5_digester.h"
 
 using std::list;
 using std::cout;
@@ -30,8 +31,8 @@ using std::pair;
 using std::string;
 using std::min;
 using boost::shared_ptr;
-using boost::lexical_cast;
 using boost::dynamic_pointer_cast;
+using dcp::raw_convert;
 
 AudioMapping::AudioMapping ()
        : _content_channels (0)
@@ -40,11 +41,11 @@ AudioMapping::AudioMapping ()
 }
 
 /** Create a default AudioMapping for a given channel count.
- *  @param c Number of channels.
+ *  @param channels Number of channels.
  */
-AudioMapping::AudioMapping (int c)
+AudioMapping::AudioMapping (int channels)
 {
-       setup (c);
+       setup (channels);
 }
 
 void
@@ -69,16 +70,16 @@ AudioMapping::make_default ()
 
        if (_content_channels == 1) {
                /* Mono -> Centre */
-               set (0, libdcp::CENTRE, 1);
+               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<libdcp::Channel> (i), 1);
+                       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"));
 
@@ -86,28 +87,28 @@ AudioMapping::AudioMapping (shared_ptr<const cxml::Node> node, int state_version
                /* 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);
+                       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<libdcp::Channel> ((*i)->number_attribute<int> ("DCP")),
-                               lexical_cast<float> ((*i)->content ())
+                               static_cast<dcp::Channel> ((*i)->number_attribute<int> ("DCP")),
+                               raw_convert<float> ((*i)->content ())
                                );
                }
        }
 }
 
 void
-AudioMapping::set (int c, libdcp::Channel d, float g)
+AudioMapping::set (int c, dcp::Channel d, float g)
 {
        _gain[c][d] = g;
 }
 
 float
-AudioMapping::get (int c, libdcp::Channel d) const
+AudioMapping::get (int c, dcp::Channel d) const
 {
        return _gain[c][d];
 }
@@ -115,14 +116,31 @@ AudioMapping::get (int c, libdcp::Channel d) const
 void
 AudioMapping::as_xml (xmlpp::Node* node) const
 {
-       node->add_child ("ContentChannels")->add_child_text (lexical_cast<string> (_content_channels));
+       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", 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))));
+                       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 a string which is unique for a given AudioMapping configuration, for
+ *  differentiation between different AudioMappings.
+ */
+string
+AudioMapping::digest () const
+{
+       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 digester.get ();
+}