[FFmpeg-devel] [PATCH 0/5][RFC] Speed up AAC decoder

Måns Rullgård mans
Wed Jan 13 17:48:24 CET 2010

Robert Swain <robert.swain at gmail.com> writes:

> On 13/01/10 15:15, M?ns Rullg?rd wrote:
>> Mans Rullgard<mans at mansr.com>  writes:
>>> This patch series speeds up the AAC decoder by 25-50% on Cortex-A8 and
>>> by 20-30% on Core i7.
>>> Some of the more obscure parts certainly need a few comments, which I
>>> will add if there are no objections to this approach.
>>> Mans Rullgard (5):
>>>    AAC: use table for cbrtf(n)*n
>>>    AAC: Compress codebook tables and optimise sign bit handling
>>>    AAC: simplify some calculations in decode_spectrum_and_dequant()
>>>    AAC: Unswitch loop over window groups in decode_spectrum_and_dequant()
>>>    AAC: Reduce depth of vlc_spectral tables to 2
>> Any further comments on this?
> As the changes pass the compliance tests and I don't have any more
> comments on the code itself, you have the green light to commit from
> me.


M?ns Rullg?rd
mans at mansr.com

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