dsound: Allocate big enough committedbuff up front.

dlls/dsound/buffer.c

@@ -264,7 +264,6 @@ static HRESULT WINAPI IDirectSoundBufferImpl_SetFrequency(IDirectSoundBuffer8 *i
 {
         IDirectSoundBufferImpl *This = impl_from_IDirectSoundBuffer8(iface);
 	DWORD oldFreq;
-	void *newcommitted;
 
 	TRACE("(%p,%ld)\n",This,freq);
 
@@ -290,17 +289,9 @@ static HRESULT WINAPI IDirectSoundBufferImpl_SetFrequency(IDirectSoundBuffer8 *i
 
 	oldFreq = This->freq;
 	This->freq = freq;
-	if (freq != oldFreq) {
+	if (freq != oldFreq)
 		DSOUND_RecalcFormat(This);
 
-		newcommitted = realloc(This->committedbuff, This->writelead);
-		if(!newcommitted) {
-			ReleaseSRWLockExclusive(&This->lock);
-			return DSERR_OUTOFMEMORY;
-		}
-		This->committedbuff = newcommitted;
-	}
-
 	ReleaseSRWLockExclusive(&This->lock);
 
 	return DS_OK;
@@ -1112,7 +1103,7 @@ HRESULT secondarybuffer_create(DirectSoundDevice *device, const DSBUFFERDESC *ds
 	/* calculate fragment size and write lead */
 	DSOUND_RecalcFormat(dsb);
 
-	dsb->committedbuff = malloc(dsb->writelead);
+	dsb->committedbuff = malloc(dsb->maxwritelead);
 	if(!dsb->committedbuff) {
 		IDirectSoundBuffer8_Release(&dsb->IDirectSoundBuffer8_iface);
 		return DSERR_OUTOFMEMORY;
@@ -1216,7 +1207,7 @@ HRESULT IDirectSoundBufferImpl_Duplicate(
         return DSERR_OUTOFMEMORY;
     }
 
-    committedbuff = malloc(pdsb->writelead);
+    committedbuff = malloc(pdsb->maxwritelead);
     if (committedbuff == NULL) {
         free(dsb);
         *ppdsb = NULL;

dlls/dsound/dsound_private.h

@@ -140,7 +140,7 @@ struct IDirectSoundBufferImpl
     PWAVEFORMATEX               pwfx;
     BufferMemory*               buffer;
     DWORD                       playflags,state,leadin;
-    DWORD                       writelead,buflen;
+    DWORD                       writelead,maxwritelead,buflen;
     DWORD                       freq;
     DSVOLUMEPAN                 volpan;
     DSBUFFERDESC                dsbd;

dlls/dsound/mixer.c

@@ -130,6 +130,7 @@ void DSOUND_RecalcFormat(IDirectSoundBufferImpl *dsb)
 
 	/* calculate the 10ms write lead */
 	dsb->writelead = (dsb->freq / 100) * dsb->pwfx->nBlockAlign;
+	dsb->maxwritelead = (DSBFREQUENCY_MAX / 100) * dsb->pwfx->nBlockAlign;
 
 	if (oldFreqAdjustDen)
 		dsb->freqAccNum = (dsb->freqAccNum * dsb->freqAdjustDen + oldFreqAdjustDen / 2) / oldFreqAdjustDen;