dsound/winealsa: Remove writelead for alsa directsound
Maarten Lankhorst
m.b.lankhorst at gmail.com
Wed Jun 27 16:43:45 CDT 2007
Due to the way alsa works it already has a huge writelead for mmap that
is guaranteed to be at least 10 ms, adding dsound's on top of it is
completely unwanted, so set a flag that it's not needed.
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>From 91b880db26aa322dcb201eb3abc88c03f35e3ea8 Mon Sep 17 00:00:00 2001
From: Maarten Lankhorst <m.b.lankhorst at gmail.com>
Date: Sat, 23 Jun 2007 20:40:35 +0200
Subject: [PATCH] dsound/winealsa: Remove writelead for alsa driver
---
dlls/dsound/primary.c | 5 ++++-
dlls/winealsa.drv/dsoutput.c | 2 +-
include/dsdriver.h | 1 +
3 files changed, 6 insertions(+), 2 deletions(-)
diff --git a/dlls/dsound/primary.c b/dlls/dsound/primary.c
index 39c097a..d8d7dc6 100644
--- a/dlls/dsound/primary.c
+++ b/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)
diff --git a/dlls/winealsa.drv/dsoutput.c b/dlls/winealsa.drv/dsoutput.c
index e4c7d3f..2d14a2c 100644
--- a/dlls/winealsa.drv/dsoutput.c
+++ b/dlls/winealsa.drv/dsoutput.c
@@ -575,7 +575,7 @@ 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;
diff --git a/include/dsdriver.h b/include/dsdriver.h
index db48167..bb7f4c6 100644
--- a/include/dsdriver.h
+++ b/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
--
1.4.4.2
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