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

[Wu Jianhua]

> 发件人: ffmpeg-devel <ffmpeg-devel-bounces at ffmpeg.org> 代表 Stone Chen <chen.stonechen at gmail.com>
> 发送时间: 2024年5月14日 13:40
> 收件人: ffmpeg-devel at ffmpeg.org
> 抄送: Stone Chen
> 主题: [FFmpeg-devel] [PATCH v3 1/2][GSoC 2024] libavcodec/x86/vvc: Add AVX2 DMVR SAD functions for VVC
> 
> 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 |
> ---

LGTM. Thanks for your efforts.