[FFmpeg-devel] [PATCH 1/5] configure: Add option for enabling LC3/LC3plus wrapper

[Paul B Mahol]

On Tue, Mar 26, 2024 at 6:07 PM Antoine Soulier <asoulier at google.com> wrote:

> What do you mean by sub-optimal?
> It's stacked by prime factors, and unrolled for FFT3 and FF5.
> The butterfly implementations of FFT3 and FF5, gives me slightly slower
> computation. FFT5 is done first, so it takes advantage of sin()/cos()
> values of 0 or 1.
> There are also no reordering steps (this stage is completely removed), but
> cannot run in-place.
> Benchmarks I made show that it runs slightly faster.
>

Compared with what?
Where is at least x86 SIMD for that MDCT?


>
> On Tue, Mar 26, 2024 at 9:59 AM Paul B Mahol <onemda at gmail.com> wrote:
>
>>
>> Isn't this using sub-optimal MDCT implementation?
>>
>