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Make sure we round the block size to a multiple of the sample size.

This commit is contained in:
mycroft 1997-03-20 20:15:24 +00:00
parent 1c9987dab4
commit 4f9648674a
2 changed files with 13 additions and 12 deletions
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12
sys/dev/isa/ad1848.c
View File

@ -1,4 +1,4 @@
/* $NetBSD: ad1848.c,v 1.20 1997/03/20 16:04:24 mycroft Exp $ */
/* $NetBSD: ad1848.c,v 1.21 1997/03/20 20:15:24 mycroft Exp $ */
/*
* Copyright (c) 1994 John Brezak
@ -1108,14 +1108,14 @@ ad1848_round_blocksize(addr, blk)
sc->sc_lastcc = -1;
/* don't try to DMA too much at once, though. */
/* Don't try to DMA too much at once. */
if (blk > NBPG)
blk = NBPG;
if (sc->channels == 2)
return (blk & ~1); /* must be even to preserve stereo separation */
else
return (blk); /* Anything goes :-) */
/* Round to a multiple of the sample size. */
blk &= -(sc->sc_channels * sc->sc_precision / 8);
return (blk);
}
int

13
sys/dev/isa/sbdsp.c
View File

@ -1,4 +1,4 @@
/* $NetBSD: sbdsp.c,v 1.37 1997/03/20 16:04:22 mycroft Exp $ */
/* $NetBSD: sbdsp.c,v 1.38 1997/03/20 20:15:25 mycroft Exp $ */
/*
* Copyright (c) 1991-1993 Regents of the University of California.
@ -631,13 +631,14 @@ sbdsp_round_blocksize(addr, blk)
sc->sc_last_hs_size = 0;
/* don't try to DMA too much at once, though. */
/* Don't try to DMA too much at once. */
if (blk > NBPG)
blk = NBPG;
if (sc->sc_channels == 2)
return (blk & ~1); /* must be even to preserve stereo separation */
else
return (blk); /* Anything goes :-) */
/* Round to a multiple of the sample size. */
blk &= -(sc->sc_channels * sc->sc_precision / 8);
return (blk);
}
int