X-Git-Url: https://git.carlh.net/gitweb/?a=blobdiff_plain;f=src%2Flib%2Faudio_mapping.cc;h=4e5a8afa20e6b890046e4f489be31545f0171a5b;hb=661de111c0dbc968ecb004eca5b26f8400b136f1;hp=ae7702998498902717b43df546c069a3e07475e3;hpb=e8204f55c981493b99814f71a50b3c3d62601032;p=dcpomatic.git

diff --git a/src/lib/audio_mapping.cc b/src/lib/audio_mapping.cc
index ae7702998..4e5a8afa2 100644
--- 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) 2013-2015 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
@@ -17,19 +17,21 @@
 
 */
 
-#include <boost/lexical_cast.hpp>
-#include <libxml++/libxml++.h>
-#include <libcxml/cxml.h>
 #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::lexical_cast;
 using boost::dynamic_pointer_cast;
 
 AudioMapping::AudioMapping ()
@@ -38,12 +40,12 @@ AudioMapping::AudioMapping ()
 
 }
 
-/** Create a default AudioMapping for a given channel count.
- *  @param c Number of channels.
+/** Create an empty AudioMapping for a given channel count.
+ *  @param channels Number of channels.
  */
-AudioMapping::AudioMapping (int c)
+AudioMapping::AudioMapping (int channels)
 {
-	setup (c);
+	setup (channels);
 }
 
 void
@@ -53,7 +55,7 @@ AudioMapping::setup (int c)
 	
 	_gain.resize (_content_channels);
 	for (int i = 0; i < _content_channels; ++i) {
-		_gain[i].resize (MAX_AUDIO_CHANNELS);
+		_gain[i].resize (MAX_DCP_AUDIO_CHANNELS);
 	}
 }
 
@@ -61,23 +63,23 @@ void
 AudioMapping::make_default ()
 {
 	for (int i = 0; i < _content_channels; ++i) {
-		for (int j = 0; j < MAX_AUDIO_CHANNELS; ++j) {
+		for (int j = 0; j < MAX_DCP_AUDIO_CHANNELS; ++j) {
 			_gain[i][j] = 0;
 		}
 	}
 
 	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 < _content_channels; ++i) {
-			set (i, static_cast<libdcp::Channel> (i), 1);
+		for (int i = 0; i < min (_content_channels, MAX_DCP_AUDIO_CHANNELS); ++i) {
+			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"));
 
@@ -85,28 +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];
 }
@@ -114,14 +116,63 @@ 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_AUDIO_CHANNELS; ++d) {
+		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 ();
+}
+
+list<dcp::Channel>
+AudioMapping::mapped_dcp_channels () const
+{
+	static float const minus_96_db = 0.000015849;
+
+	list<dcp::Channel> 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 ((dcp::Channel) j);
+			}
+		}
+	}
+
+	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;
 		}
 	}
 }
+