Index: /trunk/src/VBox/Devices/Audio/DrvHostAudioCoreAudio.cpp
===================================================================
--- /trunk/src/VBox/Devices/Audio/DrvHostAudioCoreAudio.cpp	(revision 88467)
+++ /trunk/src/VBox/Devices/Audio/DrvHostAudioCoreAudio.cpp	(revision 88468)
@@ -1898,9 +1898,9 @@
  */
 static DECLCALLBACK(int) drvHostCoreAudioHA_StreamCapture(PPDMIHOSTAUDIO pInterface, PPDMAUDIOBACKENDSTREAM pStream,
-                                                          void *pvBuf, uint32_t uBufSize, uint32_t *puRead)
+                                                          void *pvBuf, uint32_t cbBuf, uint32_t *pcbRead)
 {
     AssertPtrReturn(pInterface, VERR_INVALID_POINTER);
-    AssertPtrReturn(pStream,    VERR_INVALID_POINTER);
-    /* puRead is optional. */
+    AssertPtrReturn(pStream, VERR_INVALID_POINTER);
+    AssertPtrReturn(pcbRead, VERR_INVALID_POINTER);
 
     PCOREAUDIOSTREAM  pCAStream = (PCOREAUDIOSTREAM)pStream;
@@ -1927,6 +1927,5 @@
     if (ASMAtomicReadU32(&pCAStream->enmStatus) != COREAUDIOSTATUS_INIT)
     {
-        if (puRead)
-            *puRead = 0;
+        *pcbRead = 0;
         return VINF_SUCCESS;
     }
@@ -1941,5 +1940,5 @@
     do
     {
-        size_t cbToWrite = RT_MIN(uBufSize, RTCircBufUsed(pCAStream->pCircBuf));
+        size_t cbToWrite = RT_MIN(cbBuf, RTCircBufUsed(pCAStream->pCircBuf));
 
         uint8_t *pvChunk;
@@ -1973,8 +1972,5 @@
 
     if (RT_SUCCESS(rc))
-    {
-        if (puRead)
-            *puRead = cbReadTotal;
-    }
+        *pcbRead = cbReadTotal;
 
     return rc;