Re: AU/HAL buffer alignment
Re: AU/HAL buffer alignment
- Subject: Re: AU/HAL buffer alignment
- From: Jeff Moore <email@hidden>
- Date: Mon, 10 Mar 2003 12:11:59 -0800
The HAL doesn't make any guarantees about the alignment of the buffers.
I don't think that Audio Units make any guarantees about the alignment
of the buffers either.
The HAL uses malloc to allocate it's buffers. The default behavior of
malloc is to allocate chunks a page or larger in size so as to be page
aligned. Chunks smaller than a page don't have any guarantees about
alignment.
On Saturday, March 8, 2003, at 11:05 PM, Kurt Bigler wrote:
All the buffers passed by an output AU to my render callback appear to
be VERY aligned - like on a 4K boundary. Is this something we can
count on for buffers passed from both output AUs and the HAL?
The real question is whether we can count on 128-bit alignment, to
simplify AltiVec development.
Thanks,
Kurt Bigler
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--
Jeff Moore
Core Audio
Apple
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