From 52f736c233d0c0c302d14512dd4fc665329f66cc Mon Sep 17 00:00:00 2001
From: Doug Nazar <nazard@nazar.ca>
Date: Fri, 9 Aug 2019 02:41:51 -0400
Subject: [PATCH] pitch: Fix race between putSamples() and setting soundtouch
 parameters

The various soundtouch set*() functions may cause buffer (re)allocations
which interferes with inputting the audio data.
---
 ext/soundtouch/gstpitch.cc | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/ext/soundtouch/gstpitch.cc b/ext/soundtouch/gstpitch.cc
index 4fbe0ab28c..89bab3f07c 100644
--- a/ext/soundtouch/gstpitch.cc
+++ b/ext/soundtouch/gstpitch.cc
@@ -876,7 +876,9 @@ gst_pitch_chain (GstPad * pad, GstObject * parent, GstBuffer * buffer)
   }
 
   gst_buffer_map (buffer, &info, GST_MAP_READ);
+  GST_OBJECT_LOCK (pitch);
   priv->st->putSamples ((soundtouch::SAMPLETYPE *) info.data, info.size / pitch->info.bpf);
+  GST_OBJECT_UNLOCK (pitch);
   gst_buffer_unmap (buffer, &info);
   gst_buffer_unref (buffer);