# HG changeset patch
# User Chris Cannam
# Date 1435238324 -3600
# Node ID 806b2ea65416b320137ce1ab92c4560ce37eb46b
# Parent  19c17cd0c7d8116225345191663c35cc114bfaa9
Detect repeated notes

diff -r 19c17cd0c7d8 -r 806b2ea65416 Makefile.linux
--- a/Makefile.linux	Thu Jun 25 12:21:02 2015 +0100
+++ b/Makefile.linux	Thu Jun 25 14:18:44 2015 +0100
@@ -6,7 +6,7 @@
 CXXFLAGS := $(CFLAGS) -std=c++11
 
 VAMPSDK_DIR := ../vamp-plugin-sdk
-PLUGIN_LDFLAGS := -shared -Wl,-Bsymbolic -Wl,-z,defs -Wl,--version-script=vamp-plugin.map 
+PLUGIN_LDFLAGS := -shared -Wl,-Bsymbolic -Wl,-z,defs -Wl,--version-script=vamp-plugin.map -lpthread
 
 PLUGIN_EXT := .so
 
diff -r 19c17cd0c7d8 -r 806b2ea65416 src/Silvet.cpp
--- a/src/Silvet.cpp	Thu Jun 25 12:21:02 2015 +0100
+++ b/src/Silvet.cpp	Thu Jun 25 14:18:44 2015 +0100
@@ -1011,8 +1011,6 @@
         return { noteFeatures, onsetFeatures };
     }
     
-    //!!! try: repeated note detection? (look for change in first derivative of the pitch matrix)
-
     for (map<int, double>::const_iterator ni = m_pianoRoll[width-1].begin();
          ni != m_pianoRoll[width-1].end(); ++ni) {
 
@@ -1041,6 +1039,20 @@
             // the note was playing but just ended
             m_current.erase(note);
             emitNote(start, end, note, shiftCount, noteFeatures);
+        } else { // still playing
+            // repeated note detection: if level is greater than this
+            // multiple of its previous value, then we end the note and
+            // restart it with the same pitch
+            double restartFactor = 1.5;
+            if (duration >= durationThreshold * 2 &&
+                (active.find(note)->second >
+                 restartFactor * m_pianoRoll[width-1][note])) {
+                m_current.erase(note);
+                emitNote(start, end-1, note, shiftCount, noteFeatures);
+                // and remove this so that we start counting the new
+                // note's duration from the current position
+                m_pianoRoll[width-1].erase(note);
+            }
         }
     }