Changeset 65668 in vbox for trunk/src/VBox/Devices/Audio

Timestamp:

Feb 7, 2017 5:21:37 PM (8 years ago)

Author:

vboxsync

svn:sync-xref-src-repo-rev:

113364

Message:

Audio/AudioMixBuffer.cpp: Minor adjustments for AudioMixBufPeek().

File:

• trunk/src/VBox/Devices/Audio/AudioMixBuffer.cpp (modified) (3 diffs)

trunk/src/VBox/Devices/Audio/AudioMixBuffer.cpp

@@ -6 +6 @@
 
 /*
- * Copyright (C) 2014-2016 Oracle Corporation
+ * Copyright (C) 2014-2017 Oracle Corporation
  *
  * This file is part of VirtualBox Open Source Edition (OSE), as
@@ -180 +180 @@
         rc = VINF_SUCCESS;
     }
+
     if (csRead > cSampleBuf)
     {
@@ -186 +187 @@
     }
 
-    memcpy(paSampleBuf, &pMixBuf->pSamples[pMixBuf->offRead], sizeof(PDMAUDIOSAMPLE) * csRead);
-
-    pMixBuf->offRead = (pMixBuf->offRead + csRead) % pMixBuf->cSamples;
-    Assert(pMixBuf->offRead <= pMixBuf->cSamples);
-    pMixBuf->cUsed -= RT_MIN(csRead, pMixBuf->cUsed);
+    if (csRead)
+    {
+        memcpy(paSampleBuf, &pMixBuf->pSamples[pMixBuf->offRead], sizeof(PDMAUDIOSAMPLE) * csRead);
+
+        pMixBuf->offRead = (pMixBuf->offRead + csRead) % pMixBuf->cSamples;
+        Assert(pMixBuf->offRead <= pMixBuf->cSamples);
+        pMixBuf->cUsed -= RT_MIN(csRead, pMixBuf->cUsed);
+    }
 
     if (pcSamplesRead)