From 2b8f5dd7593708e5fcc8106bd3d0f0f57fa87c2f Mon Sep 17 00:00:00 2001
From: Mike Walters <mike@flomp.net>
Date: Sun, 6 Mar 2016 16:51:15 +0000
Subject: [PATCH] spectrogram: Workaround crash on final partial tile

---
 spectrogramplot.cpp | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/spectrogramplot.cpp b/spectrogramplot.cpp
index f2fc330..077daac 100644
--- a/spectrogramplot.cpp
+++ b/spectrogramplot.cpp
@@ -75,6 +75,7 @@ void SpectrogramPlot::paintMid(QPainter &painter, QRect &rect, range_t<off_t> sa
     for (int x = rect.left(); x < rect.right(); x += linesPerTile()) {
         QPixmap *tile = getPixmapTile(tileID);
         // TODO: don't draw past rect.right()
+        // TODO: handle partial final tile
         painter.drawPixmap(QRect(x, rect.y(), linesPerTile() - xoffset, fftSize), *tile, QRect(xoffset, 0, linesPerTile() - xoffset, fftSize));
         xoffset = 0;
         tileID += getStride() * linesPerTile();
@@ -127,6 +128,8 @@ void SpectrogramPlot::getLine(float *dest, off_t sample)
 {
     if (inputSource && fft) {
         auto buffer = inputSource->getSamples(sample, fftSize);
+        if (buffer == nullptr)
+            return;
 
         for (int i = 0; i < fftSize; i++) {
             buffer[i].real(buffer[i].real() * window[i]);