[FFmpeg-devel] [PATCH v3 1/2][GSoC 2024] libavcodec/x86/vvc: Add AVX2 DMVR SAD functions for VVC

[Ronald S. Bultje]

Hi,

On Tue, May 14, 2024 at 4:40 PM Stone Chen <chen.stonechen at gmail.com> wrote:

> Implements AVX2 DMVR (decoder-side motion vector refinement) SAD
> functions. DMVR SAD is only calculated if w >= 8, h >= 8, and w * h > 128.
> To reduce complexity, SAD is only calculated on even rows. This is
> calculated for all video bitdepths, but the values passed to the function
> are always 16bit (even if the original video bitdepth is 8). The AVX2
> implementation uses min/max/sub.
>
> Benchmarks ( AMD 7940HS )
> Before:
> BQTerrace_1920x1080_60_10_420_22_RA.vvc | 80.7 |
> Chimera_8bit_1080P_1000_frames.vvc | 158.0 |
> NovosobornayaSquare_1920x1080.bin | 159.7 |
> RitualDance_1920x1080_60_10_420_37_RA.266 | 146.3 |
>
> After:
> BQTerrace_1920x1080_60_10_420_22_RA.vvc | 82.7 |
> Chimera_8bit_1080P_1000_frames.vvc | 167.0 |
> NovosobornayaSquare_1920x1080.bin | 166.3 |
> RitualDance_1920x1080_60_10_420_37_RA.266 | 154.0 |
>

I assume these are FPS benchmarks? Can you provide checkasm --bench output
for these functions also?

Ronald