From 05f05e11e7c8c536a101f029b49917c01907ec36 Mon Sep 17 00:00:00 2001
From: Josh Klontz <josh.klontz@gmail.com>
Date: Sun, 13 Jan 2013 12:00:16 -0500
Subject: [PATCH] implemented check of demographic filters prior to matching templates

---
 sdk/openbr_plugin.cpp | 16 ++++++++++++++++
 sdk/openbr_plugin.h   |  2 +-
 2 files changed, 17 insertions(+), 1 deletion(-)

diff --git a/sdk/openbr_plugin.cpp b/sdk/openbr_plugin.cpp
index 8c42988..20685c3 100644
--- a/sdk/openbr_plugin.cpp
+++ b/sdk/openbr_plugin.cpp
@@ -1238,6 +1238,22 @@ void Distance::compare(const TemplateList &target, const TemplateList &query, Ou
     if (Globals->parallelism) Globals->trackFutures(futures);
 }
 
+float Distance::compare(const Template &target, const Template &query) const
+{
+    if (!Globals->demographicFilters.isEmpty()) {
+        // The if statement is a faster check then iterating over an empty list of filters
+        foreach (const QString &filter, Globals->demographicFilters) {
+            const QString targetMetadata = target.file.getString(filter, "");
+            const QString queryMetadata = query.file.getString(filter, "");
+            if (targetMetadata.isEmpty() || queryMetadata.isEmpty()) continue;
+            if (targetMetadata != queryMetadata) return -std::numeric_limits<float>::max();
+        }
+    }
+
+    return a * (_compare(target, query) - b);
+}
+
+/* Distance - private methods */
 void Distance::compareBlock(const TemplateList &target, const TemplateList &query, Output *output, int targetOffset, int queryOffset) const
 {
     for (int i=0; i<query.size(); i++)
diff --git a/sdk/openbr_plugin.h b/sdk/openbr_plugin.h
index 7a6debd..f040c99 100644
--- a/sdk/openbr_plugin.h
+++ b/sdk/openbr_plugin.h
@@ -1040,7 +1040,7 @@ public:
     static QSharedPointer<Distance> fromAlgorithm(const QString &algorithm); /*!< \brief Retrieve an algorithm's distance. */
     virtual void train(const TemplateList &src); /*!< \brief Train the distance. */
     virtual void compare(const TemplateList &target, const TemplateList &query, Output *output) const; /*!< \brief Compare two template lists. */
-    inline float compare(const Template &target, const Template &query) const { return a * (_compare(target, query) - b); } /*!< \brief Compute the normalized distance between two templates. */
+    float compare(const Template &target, const Template &query) const; /*!< \brief Compute the normalized distance between two templates. */
 
 private:
     virtual void compareBlock(const TemplateList &target, const TemplateList &query, Output *output, int targetOffset, int queryOffset) const;
--
libgit2 0.21.4