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dsound: Ensure primary buffer's buffer is large enough to hold the entire prebuffer.

oldstable
Andrew Eikum 2012-05-14 12:31:17 -05:00 committed by Alexandre Julliard
parent 7dce1418ff
commit 8327e6f423
1 changed files with 14 additions and 22 deletions
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36
dlls/dsound/primary.c
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@ -58,18 +58,6 @@ static DWORD DSOUND_fraglen(DirectSoundDevice *device)
return ret;
}
static void DSOUND_RecalcPrimary(DirectSoundDevice *device)
{
TRACE("(%p)\n", device);
device->fraglen = DSOUND_fraglen(device);
device->helfrags = device->buflen / device->fraglen;
TRACE("fraglen=%d helfrags=%d\n", device->fraglen, device->helfrags);
/* calculate the 10ms write lead */
device->writelead = (device->pwfx->nSamplesPerSec / 100) * device->pwfx->nBlockAlign;
}
HRESULT DSOUND_ReopenDevice(DirectSoundDevice *device, BOOL forcewave)
{
UINT prebuf_frames;
@ -153,18 +141,23 @@ HRESULT DSOUND_ReopenDevice(DirectSoundDevice *device, BOOL forcewave)
static HRESULT DSOUND_PrimaryOpen(DirectSoundDevice *device)
{
DWORD buflen;
LPBYTE newbuf;
TRACE("(%p)\n", device);
device->fraglen = DSOUND_fraglen(device);
/* on original windows, the buffer it set to a fixed size, no matter what the settings are.
on windows this size is always fixed (tested on win-xp) */
if (!device->buflen)
device->buflen = ds_hel_buflen;
buflen = device->buflen;
buflen -= buflen % device->pwfx->nBlockAlign;
device->buflen = buflen;
device->buflen -= device->buflen % device->pwfx->nBlockAlign;
while(device->buflen < device->fraglen * device->prebuf){
device->buflen += ds_hel_buflen;
device->buflen -= device->buflen % device->pwfx->nBlockAlign;
}
device->helfrags = device->buflen / device->fraglen;
device->mix_buffer_len = DSOUND_bufpos_to_mixpos(device, device->buflen);
device->mix_buffer = HeapAlloc(GetProcessHeap(), 0, device->mix_buffer_len);
@ -174,13 +167,11 @@ static HRESULT DSOUND_PrimaryOpen(DirectSoundDevice *device)
if (device->state == STATE_PLAYING) device->state = STATE_STARTING;
else if (device->state == STATE_STOPPING) device->state = STATE_STOPPED;
TRACE("desired buflen=%d, old buffer=%p\n", buflen, device->buffer);
/* reallocate emulated primary buffer */
if (device->buffer)
newbuf = HeapReAlloc(GetProcessHeap(),0,device->buffer, buflen);
newbuf = HeapReAlloc(GetProcessHeap(),0,device->buffer, device->buflen);
else
newbuf = HeapAlloc(GetProcessHeap(),0, buflen);
newbuf = HeapAlloc(GetProcessHeap(),0, device->buflen);
if (!newbuf) {
ERR("failed to allocate primary buffer\n");
@ -188,11 +179,12 @@ static HRESULT DSOUND_PrimaryOpen(DirectSoundDevice *device)
/* but the old buffer might still exist and must be re-prepared */
}
DSOUND_RecalcPrimary(device);
device->writelead = (device->pwfx->nSamplesPerSec / 100) * device->pwfx->nBlockAlign;
device->buffer = newbuf;
TRACE("fraglen=%d\n", device->fraglen);
TRACE("buflen: %u, fraglen: %u, helfrags: %u, mix_buffer_len: %u\n",
device->buflen, device->fraglen, device->helfrags, device->mix_buffer_len);
device->mixfunction = mixfunctions[device->pwfx->wBitsPerSample/8 - 1];
device->normfunction = normfunctions[device->pwfx->wBitsPerSample/8 - 1];