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wineoss.drv: Cap reported OSS fill level to expected level.

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Some devices apparently return that the buffer contains an extra frame
that we never wrote. We should account for that to avoid an integer
underflow.
This commit is contained in:
Andrew Eikum 2015-04-06 08:21:48 -05:00 committed by Alexandre Julliard
parent 6c073fe9a9
commit 025e6650e4
1 changed files with 6 additions and 0 deletions
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6
dlls/wineoss.drv/mmdevdrv.c
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@ -1412,6 +1412,12 @@ static void oss_write_data(ACImpl *This)
}else
in_oss_frames = (This->oss_bufsize_bytes - bi.bytes) / This->fmt->nBlockAlign;
if(in_oss_frames > This->in_oss_frames){
TRACE("Capping reported frames from %u to %u\n",
in_oss_frames, This->in_oss_frames);
in_oss_frames = This->in_oss_frames;
}
write_limit = 0;
while(write_limit + in_oss_frames < max_period * 3)
write_limit += max_period;