Re: [FFmpeg-devel] [PATCH v5 1/2][GSoC 2024] libavcodec/x86/vvc: Add AVX2 DMVR SAD functions for VVC

[James Almer <jamrial@gmail.com>]

On 5/21/2024 10:01 PM, Ronald S. Bultje wrote:
> Hi,
> 
> On Tue, May 21, 2024 at 8:01 PM Stone Chen <chen.stonechen@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.
>>
>> Additionally this changes parameters dx and dy from int to intptr_t. This
>> allows dx & dy to be used as pointer offsets without needing to use movsxd.
>>
>> Benchmarks ( AMD 7940HS )
>> Before:
>> BQTerrace_1920x1080_60_10_420_22_RA.vvc | 106.0 |
>> Chimera_8bit_1080P_1000_frames.vvc | 204.3 |
>> NovosobornayaSquare_1920x1080.bin | 197.3 |
>> RitualDance_1920x1080_60_10_420_37_RA.266 | 174.0 |
>>
>> After:
>> BQTerrace_1920x1080_60_10_420_22_RA.vvc | 109.3 |
>> Chimera_8bit_1080P_1000_frames.vvc | 216.0 |
>> NovosobornayaSquare_1920x1080.bin | 204.0|
>> RitualDance_1920x1080_60_10_420_37_RA.266 | 181.7 |
>> ---
>>   libavcodec/vvc/dsp.c             |   2 +-
>>   libavcodec/vvc/dsp.h             |   2 +-
>>   libavcodec/x86/vvc/Makefile      |   3 +-
>>   libavcodec/x86/vvc/vvc_sad.asm   | 130 +++++++++++++++++++++++++++++++
>>   libavcodec/x86/vvc/vvcdsp_init.c |   6 ++
>>   5 files changed, 140 insertions(+), 3 deletions(-)
>>   create mode 100644 libavcodec/x86/vvc/vvc_sad.asm
>>
> 
> LGTM.
> 
> Ronald

Implemented my changes and applied.
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