[pulseaudio-discuss] [PATCH 0/4] Add support for libsoxr resampler

[Andrey Semashev]

On Thu, Nov 13, 2014 at 7:12 AM, Alexander E. Patrakov
<patrakov at gmail.com> wrote:
> 13.11.2014 01:16, Andrey Semashev пишет:
>>
>> However, the other three presets do have different performance and
>> quality. In
>> my test results [1] -mq is about 2 times faster than -vhq, and -hq is
>> somewhere in between. Performance wise, there should be no problem with
>> -vhq
>> on modern CPUs, but maybe the little extra would be desired in embedded
>> domain
>> to conserve battery.
>
>
> Well, in the embedded domain, there is usually no FPU or a bad FPU, and a
> different resampler (hint: speex-fixed-X) is needed anyway :)

Most current ARM CPUs have NEON, and libsoxr has optimizations for it.
I didn't benchmark it, but since soxr is faster than speex on x86, it
seems possible for it to be faster on ARM as well. It'be interesting
to bench it though.