From dfadcff5c912beee1d1b76d50d47adcea2e400e4 Mon Sep 17 00:00:00 2001
From: Gary Scavone <gary@music.mcgill.ca>
Date: Sun, 7 Apr 2019 15:38:58 -0400
Subject: [PATCH] Added clearing of input user buffer in stopStream for OS-X,
 in case stream is restarted.

---
 RtAudio.cpp | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/RtAudio.cpp b/RtAudio.cpp
index 912704e..0dff2d3 100644
--- a/RtAudio.cpp
+++ b/RtAudio.cpp
@@ -1656,7 +1656,12 @@ void RtApiCore :: stopStream( void )
 
   stream_.state = STREAM_STOPPED;
   // set stream time to zero?
-  // and perhaps clear input user or device buffers?
+  // Clear user input buffer in case the stream is restarted
+  if ( stream_.mode == INPUT || stream_.mode == DUPLEX ) {
+    unsigned long bufferBytes;
+    bufferBytes = stream_.nUserChannels[1] * stream_.bufferSize * formatBytes( stream_.userFormat );
+    memset( stream_.userBuffer[1], 0, bufferBytes * sizeof(char) );
+  }
 
  unlock:
   if ( result == noErr ) return;