1 files changed, 69 insertions, 0 deletions
diff --git a/libs/rubberband/src/SilentAudioCurve.cpp b/libs/rubberband/src/SilentAudioCurve.cpp
new file mode 100644
index 0000000000..b44564671c
--- /dev/null
+++ b/libs/rubberband/src/SilentAudioCurve.cpp
@@ -0,0 +1,69 @@
+/* -*- c-basic-offset: 4 indent-tabs-mode: nil -*-  vi:set ts=8 sts=4 sw=4: */
+
+/*
+    Rubber Band
+    An audio time-stretching and pitch-shifting library.
+    Copyright 2007-2008 Chris Cannam.
+    
+    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 the Free Software Foundation; either version 2 of the
+    License, or (at your option) any later version.  See the file
+    COPYING included with this distribution for more information.
+*/
+
+#include "SilentAudioCurve.h"
+
+#include <cmath>
+
+namespace RubberBand
+{
+
+SilentAudioCurve::SilentAudioCurve(size_t sampleRate, size_t windowSize) :
+    AudioCurve(sampleRate, windowSize)
+{
+}
+
+SilentAudioCurve::~SilentAudioCurve()
+{
+}
+
+void
+SilentAudioCurve::reset()
+{
+}
+
+void
+SilentAudioCurve::setWindowSize(size_t newSize)
+{
+    m_windowSize = newSize;
+}
+
+float
+SilentAudioCurve::process(const float *R__ mag, size_t)
+{
+    const int hs = m_windowSize / 2;
+    static float threshold = powf(10.f, -6);
+
+    for (int i = 0; i <= hs; ++i) {
+        if (mag[i] > threshold) return 0.f;
+    }
+        
+    return 1.f;
+}
+
+float
+SilentAudioCurve::process(const double *R__ mag, size_t)
+{
+    const int hs = m_windowSize / 2;
+    static double threshold = pow(10.0, -6);
+
+    for (int i = 0; i <= hs; ++i) {
+        if (mag[i] > threshold) return 0.f;
+    }
+        
+    return 1.f;
+}
+
+}
+