[tremor] Tremor Memory Footprint

[Werner Sharp]

> > I'm using tremor in a Windows CE project that may be in a low memory
> > situation when decoding the Ogg file.   If there's not enough memory
> > available, tremor just crashes out because there's not any(?)
out-of-memory
> > checks.   Does anyone know if tremor has a general memory footprint
required
> > to decode a file?
>
> I think no such analysis has been done yet.  However you could easily add
> some checks for failed allocations and/or allocation accounting by
defining
> ogg_malloc/ogg_calloc/ogg_realloc/ogg_free wrappers (see os_types.h).

Thanks, but there's no exception handling on CE if that's what you were
thinking.

I have most places patched to handle it ok. I added out-of-memory checks to
the following functions...

vorbis_static_unpack
vorbis_info_floor
ogg_stream_init
ov_raw_seek

and that seemed to take care of the crashes I'm seeing.  I also added some
purging code ahead of the Ogg decompression.   This is really a stress test
case and if the application is this low on free memory (500kb or less left),
it's in trouble anyway.

-Werner

>
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