From 9f52e983573eddcc25fdcdf4797ee146803e5242 Mon Sep 17 00:00:00 2001
From: Mike Walters <mike@flomp.net>
Date: Thu, 5 Oct 2017 03:56:04 +0100
Subject: [PATCH] Dirty hack to fix #89

---
 spectrogramplot.cpp | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/spectrogramplot.cpp b/spectrogramplot.cpp
index 31487b6..6c03b5d 100644
--- a/spectrogramplot.cpp
+++ b/spectrogramplot.cpp
@@ -206,8 +206,12 @@ void SpectrogramPlot::getLine(float *dest, off_t sample)
 {
     if (inputSource && fft) {
         auto buffer = inputSource->getSamples(sample, fftSize);
-        if (buffer == nullptr)
+        if (buffer == nullptr) {
+            auto neg_infinity = -1 * std::numeric_limits<float>::infinity();
+            for (int i = 0; i < fftSize; i++, dest++)
+                *dest = neg_infinity;
             return;
+        }
 
         for (int i = 0; i < fftSize; i++) {
             buffer[i] *= window[i];