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Code Issues Releases Activity

libavcode/x86/vvc: change label to vvc_sad_16 to reflect block sizes

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According to the VVC specification (section 8.5.1), the maximum width/height of a subblock passed for DMVR SAD is 16. This along with previous constraint requiring width * height >= 128 means that  8x16, 16x8, and 16x16 are the only allowed sizes. This re-labels vvc_sad_16_128 to vvc_sad_16 to reflect this and adds a comment about the block size constraints. There's no functionality change.
This commit is contained in:
Stone Chen 2024-05-28 15:09:00 -04:00 committed by Nuo Mi
parent 510494760c
commit 55e9c758f0
1 changed files with 3 additions and 2 deletions
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5
libavcodec/x86/vvc/vvc_sad.asm
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@ -29,6 +29,7 @@ SECTION_RODATA
pw_1: times 2 dw 1
; DMVR SAD is only calculated on even rows to reduce complexity
; Additionally the only valid sizes are 8x16, 16x8, and 16x16
SECTION .text
%macro MIN_MAX_SAD 3
@ -77,7 +78,7 @@ cglobal vvc_sad, 6, 9, 5, src1, src2, dx, dy, block_w, block_h, off1, off2, row_
vpbroadcastd m4, [pw_1]
cmp block_wd, 16
jge vvc_sad_16_128
je vvc_sad_16
vvc_sad_8:
.loop_height:
@ -100,7 +101,7 @@ cglobal vvc_sad, 6, 9, 5, src1, src2, dx, dy, block_w, block_h, off1, off2, row_
movd eax, xm0
RET
vvc_sad_16_128:
vvc_sad_16:
sar block_wd, 4
.loop_height:
mov off1q, src1q