X-Git-Url: https://git.carlh.net/gitweb/?a=blobdiff_plain;f=src%2Flib%2Faudio_mapping.cc;h=b3757c5f1be9bd2fefc2a38199215201cde2cf11;hb=8102046b2f29e0c7b234c29bf204b056cb30e64f;hp=3620001251ec688857c172c80c2883f1b8add42a;hpb=d324fc102df00d6dc62614938f78cf983a101dd4;p=dcpomatic.git

diff --git a/src/lib/audio_mapping.cc b/src/lib/audio_mapping.cc
index 362000125..b3757c5f1 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) 2013-2014 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
@@ -17,19 +17,22 @@
 
 */
 
-#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;
 using std::make_pair;
 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)
@@ -38,80 +41,106 @@ 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)
-	: _content_channels (c)
+AudioMapping::AudioMapping (int channels)
 {
+	setup (channels);
+}
 
+void
+AudioMapping::setup (int c)
+{
+	_content_channels = c;
+	
+	_gain.resize (_content_channels);
+	for (int i = 0; i < _content_channels; ++i) {
+		_gain[i].resize (MAX_DCP_AUDIO_CHANNELS);
+	}
 }
 
 void
 AudioMapping::make_default ()
 {
+	for (int i = 0; i < _content_channels; ++i) {
+		for (int j = 0; j < MAX_DCP_AUDIO_CHANNELS; ++j) {
+			_gain[i][j] = 0;
+		}
+	}
+
 	if (_content_channels == 1) {
 		/* Mono -> Centre */
-		add (0, libdcp::CENTRE);
+		set (0, dcp::CENTRE, 1);
 	} else {
 		/* 1:1 mapping */
-		for (int i = 0; i < _content_channels; ++i) {
-			add (i, static_cast<libdcp::Channel> (i));
+		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)
+AudioMapping::AudioMapping (cxml::ConstNodePtr node, int state_version)
 {
-	_content_channels = node->number_child<int> ("ContentChannels");
-	
-	list<cxml::NodePtr> const c = node->node_children ("Map");
-	for (list<cxml::NodePtr>::const_iterator i = c.begin(); i != c.end(); ++i) {
-		add ((*i)->number_child<int> ("ContentIndex"), static_cast<libdcp::Channel> ((*i)->number_child<int> ("DCP")));
+	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 ())
+				);
+		}
 	}
 }
 
 void
-AudioMapping::add (int c, libdcp::Channel d)
+AudioMapping::set (int c, dcp::Channel d, float g)
 {
-	_content_to_dcp.push_back (make_pair (c, d));
+	_gain[c][d] = g;
 }
 
-list<int>
-AudioMapping::dcp_to_content (libdcp::Channel d) const
+float
+AudioMapping::get (int c, dcp::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;
+	return _gain[c][d];
 }
 
-list<libdcp::Channel>
-AudioMapping::content_to_dcp (int c) const
+void
+AudioMapping::as_xml (xmlpp::Node* node) 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);
+	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 d;
 }
 
-void
-AudioMapping::as_xml (xmlpp::Node* node) const
+/** @return a string which is unique for a given AudioMapping configuration, for
+ *  differentiation between different AudioMappings.
+ */
+string
+AudioMapping::digest () 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));
+	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 ();
 }