dsound/winealsa: Remove writelead for alsa directsound.

dlls/dsound/primary.c

@@ -64,8 +64,11 @@ static void DSOUND_RecalcPrimary(DirectSoundDevice *device)
 		device->fraglen = fraglen;
 		TRACE("fraglen=%d\n", device->fraglen);
 	}
+	if (device->hwbuf && device->drvdesc.dwFlags & DSDDESC_DONTNEEDWRITELEAD)
+		device->writelead = 0;
+	else
 	/* calculate the 10ms write lead */
-	device->writelead = (device->pwfx->nSamplesPerSec / 100) * nBlockAlign;
+		device->writelead = (device->pwfx->nSamplesPerSec / 100) * nBlockAlign;
 }
 
 static HRESULT DSOUND_PrimaryOpen(DirectSoundDevice *device)

dlls/winealsa.drv/dsoutput.c

@@ -596,7 +596,7 @@ static HRESULT WINAPI IDsDriverImpl_GetDriverDesc(PIDSDRIVER iface, PDSDRIVERDES
     IDsDriverImpl *This = (IDsDriverImpl *)iface;
     TRACE("(%p,%p)\n",iface,pDesc);
     memcpy(pDesc, &(WOutDev[This->wDevID].ds_desc), sizeof(DSDRIVERDESC));
-    pDesc->dwFlags		= DSDDESC_DONTNEEDPRIMARYLOCK | DSDDESC_DONTNEEDSECONDARYLOCK;
+    pDesc->dwFlags		= DSDDESC_DONTNEEDPRIMARYLOCK | DSDDESC_DONTNEEDSECONDARYLOCK | DSDDESC_DONTNEEDWRITELEAD;
     pDesc->dnDevNode		= WOutDev[This->wDevID].waveDesc.dnDevNode;
     pDesc->wVxdId		= 0;
     pDesc->wReserved		= 0;

include/dsdriver.h

@@ -52,6 +52,7 @@ typedef struct IDsCaptureDriverBuffer *PIDSCDRIVERBUFFER;
 #define DSDDESC_USESYSTEMMEMORY		0x00000004
 #define DSDDESC_DONTNEEDPRIMARYLOCK	0x00000008
 #define DSDDESC_DONTNEEDSECONDARYLOCK	0x00000010
+#define DSDDESC_DONTNEEDWRITELEAD	0x00000020
 
 #define DSDHEAP_NOHEAP			0
 #define DSDHEAP_CREATEHEAP		1