Changeset 73692 in vbox for trunk/src/VBox

Timestamp:

Aug 15, 2018 1:27:59 PM (6 years ago)

Author:

vboxsync

Message:

Audio/DrvHostDSound.cpp: Only set acquired parameters if DirectSound has returned a different buffer size than initially requested.

File:

• trunk/src/VBox/Devices/Audio/DrvHostDSound.cpp (modified) (1 diff)

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

@@ -765 +765 @@
         pThis->pDSStrmOut = pStreamDS;
 
-        pCfgAcq->Backend.cfBufferSize = PDMAUDIOSTREAMCFG_B2F(pCfgAcq, pStreamDS->cbBufSize);
-        pCfgAcq->Backend.cfPeriod     = pCfgAcq->Backend.cfBufferSize / 2;
-        pCfgAcq->Backend.cfPreBuf     = pCfgAcq->Backend.cfBufferSize;
+        const uint32_t cfBufSize = PDMAUDIOSTREAMCFG_B2F(pCfgAcq, pStreamDS->cbBufSize);
+        if (cfBufSize != pCfgAcq->Backend.cfBufferSize)
+        {
+            pCfgAcq->Backend.cfBufferSize = cfBufSize;
+            pCfgAcq->Backend.cfPeriod     = cfBufSize / 4;
+            pCfgAcq->Backend.cfPreBuf     = pCfgAcq->Backend.cfPeriod * 2;
+        }
 
     } while (0);