From 017271b90900ac807b4480b0b38852d31fac3dde Mon Sep 17 00:00:00 2001
From: itsmattkc <itsmattkc@gmail.com>
Date: Mon, 1 Jun 2020 04:45:45 +1000
Subject: [PATCH] cachetask: write silence if no samples are returned

Fixes segfault trying to access a null sample buffer.
---
 app/task/cache/cache.cpp | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/app/task/cache/cache.cpp b/app/task/cache/cache.cpp
index dae6329e3..b2f054b1c 100644
--- a/app/task/cache/cache.cpp
+++ b/app/task/cache/cache.cpp
@@ -71,7 +71,11 @@ void CacheTask::FrameDownloaded(const QByteArray &hash, const std::list<rational
 
 void CacheTask::AudioDownloaded(const TimeRange &range, SampleBufferPtr samples)
 {
-  viewer()->audio_playback_cache()->WritePCM(range, samples);
+  if (samples) {
+    viewer()->audio_playback_cache()->WritePCM(range, samples);
+  } else {
+    viewer()->audio_playback_cache()->WriteSilence(range);
+  }
 }
 
 OLIVE_NAMESPACE_EXIT