From f09f984c17ef3163de0296aa415828a5249a095b Mon Sep 17 00:00:00 2001
From: "sgunderson@bigfoot.com" <>
Date: Tue, 20 Jul 2010 00:15:28 +0200
Subject: [PATCH 1/1] Add the same dB-safeguard to glpitch as to pitch.

---
 glpitch.cpp | 23 ++++++++++++-----------
 1 file changed, 12 insertions(+), 11 deletions(-)

diff --git a/glpitch.cpp b/glpitch.cpp
index 90c47b8..e40f8ce 100644
--- a/glpitch.cpp
+++ b/glpitch.cpp
@@ -49,17 +49,18 @@ int main(void)
 		glVertex2f(MAX_X, 0.0f);
 		glEnd();
 
-		glBlendFunc(GL_SRC_ALPHA, GL_ONE);
-
-		double peak_pos = find_pos(peak.first);
-
-		glBegin(GL_QUADS);	
-		glColor4f(0.0, 1.0f, 0.0f, 0.2f);
-		glVertex2f(peak_pos - 0.1, 0.0f);
-		glVertex2f(peak_pos - 0.1, 1.0f);
-		glVertex2f(peak_pos + 0.1, 1.0f);
-		glVertex2f(peak_pos + 0.1, 0.0f);
-		glEnd();
+		if (peak.second - log10(FFT_LENGTH) >= 0.0) {
+			double peak_pos = find_pos(peak.first);
+
+			glBlendFunc(GL_SRC_ALPHA, GL_ONE);
+			glBegin(GL_QUADS);	
+			glColor4f(0.0, 1.0f, 0.0f, 0.2f);
+			glVertex2f(peak_pos - 0.1, 0.0f);
+			glVertex2f(peak_pos - 0.1, 1.0f);
+			glVertex2f(peak_pos + 0.1, 1.0f);
+			glVertex2f(peak_pos + 0.1, 0.0f);
+			glEnd();
+		}
 
 		glColor4f(1.0f, 1.0f, 1.0f, 1.0f);
 		glBegin(GL_LINES);
-- 
2.39.2