[FFmpeg-devel] [PATCH] AAC: type puns for 16 bit floating point rounding

[Måns Rullgård]

Alex Converse <alex.converse at gmail.com> writes:

> On Mon, Feb 16, 2009 at 7:22 PM, Alex Converse <alex.converse at gmail.com> wrote:
>> On Thu, Feb 12, 2009 at 9:29 AM, Robert Swain <robert.swain at gmail.com> wrote:
>>> 2008/12/21 Robert Swain <robert.swain at gmail.com>:
>>>> 2008/12/13 Guillaume POIRIER <poirierg at gmail.com>:
>>>>> On Sat, Dec 13, 2008 at 3:54 PM, M?ns Rullg?rd <mans at mansr.com> wrote:
>>>>>> Can you upload the file somewhere?  I'd rather not install mp4box just
>>>>>> for this.
>>>>>
>>>>> Sure, here it is: http://natsuki.mplayerhq.hu/~ml-admin/type_puns.mp4
>>>>
>>>> M?ns?
>>>
>>> This thread seems to be mostly dead. Maybe Alex can do something to
>>> make the speed testing that needs to be done easier so we can get
>>> these optimisations merged into trunk, if indeed they do make decoding
>>> faster.
>>>
>>
>> /MPlayer/incoming/aac-main/aac-main-long.adts,txt
>>
>> My system reports (Linux/amd64):
>> before:
>> real    0m7.602s
>> user    0m7.568s
>> sys     0m0.032s
>>
>> after:
>> real    0m1.182s
>> user    0m1.148s
>> sys     0m0.040s
>>
>> I think we are looking for someone on ARM to test
>
> Let's try this one more time:
>
> We are looking for people on exotic architectures (non-x86) to
> benchmark decoding a specific file on their systems before and after
> the attached patch.
>
> The file: /MPlayer/incoming/aac-main/aac-main-long.adts,txt
> Mirror: http://filer.case.edu/ajc30/pub/ffmpeg/

It's faster by a wide margin on my ARM Cortex-A8 and Alpha.

-- 
M?ns Rullg?rd
mans at mansr.com