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Philipp Hancke aa6cedb39c Add a box filter to ScaleUV 
kFilterBox only had 1/2 and 1/4 fast paths. Everything else fell
through to ScaleUVSimple and point sampled, so NV12 chroma was
unfiltered where I420 was not. 13.6 dB against 50.2 dB at 3x.

ScaleUVBox mirrors ScalePlaneBox. Row accumulation reuses ScaleAddRow
and its SIMD variants, since summing is position wise and an
interleaved row is just src_cols * 2 samples. Only the column pass,
which sums U and V at a stride of 2, is new.

Output is now byte identical to the I420 path. Tests compare against
ScalePlane rather than C against SIMD, which is what missed this.

Bug: libyuv:564129034
Change-Id: I26221f5435dbfc845ad2fc13aa347ef56ccf7bc6
Reviewed-on: https://chromium-review.googlesource.com/c/libyuv/libyuv/+/8426668
Reviewed-by: richard winterton <rrwinterton@gmail.com>
Reviewed-by: Frank Barchard <fbarchard@google.com>
2026-10-02 15:37:21 -07:00
..
compare_common.cc [libyuv] Keep LIBYUV_API in basic_types.h and remove legacy types and bool macros 2026-08-28 08:32:19 -07:00
compare_gcc.cc Compare AVX512BW and AVX2, intrinsics for Visual C and ROWWIN 2026-10-02 15:30:05 -07:00
compare_neon64.cc [libyuv] Keep LIBYUV_API in basic_types.h and remove legacy types and bool macros 2026-08-28 08:32:19 -07:00
compare_neon.cc [libyuv] Keep LIBYUV_API in basic_types.h and remove legacy types and bool macros 2026-08-28 08:32:19 -07:00
compare_win.cc Compare AVX512BW and AVX2, intrinsics for Visual C and ROWWIN 2026-10-02 15:30:05 -07:00
compare.cc Compare AVX512BW and AVX2, intrinsics for Visual C and ROWWIN 2026-10-02 15:30:05 -07:00
convert_argb.cc I422ToRGB24 avx512bw tail and row coalesce 2026-09-24 12:07:29 -07:00
convert_from_argb.cc ARGBToRGB24 AVX512 with tail masking 2026-09-29 16:15:44 -07:00
convert_from.cc clang format and bump version 2026-09-28 10:42:45 -07:00
convert_jpeg.cc [libyuv] Keep LIBYUV_API in basic_types.h and remove legacy types and bool macros 2026-08-28 08:32:19 -07:00
convert_to_argb.cc clang format and bump version 2026-09-28 10:42:45 -07:00
convert_to_i420.cc clang format and bump version 2026-09-28 10:42:45 -07:00
convert.cc InterpolateRow_AVX512BW with tail masking 2026-09-29 11:22:47 -07:00
cpu_id.cc RVV port to inline from intrinsics 2026-09-21 14:26:26 -07:00
mjpeg_decoder.cc [libyuv] Fix RISC-V CMake/GN/Bazel builds and C compiler driver linking 2026-09-28 10:59:30 -07:00
mjpeg_validate.cc [libyuv] Keep LIBYUV_API in basic_types.h and remove legacy types and bool macros 2026-08-28 08:32:19 -07:00
planar_functions.cc InterpolateRow_AVX512BW with tail masking 2026-09-29 11:22:47 -07:00
rotate_any.cc Rotate intrinsics for Visual C, ROWWIN and 32 bit x86 2026-10-01 20:39:30 -07:00
rotate_argb.cc SVE2 row functions needed for multipass image functions 2026-08-06 12:40:26 -07:00
rotate_common.cc Transpose 16x16 for AVX2 2026-10-01 17:31:33 -07:00
rotate_gcc.cc Rotate intrinsics for Visual C, ROWWIN and 32 bit x86 2026-10-01 20:39:30 -07:00
rotate_lsx.cc Transpose 16x16 for AVX2 2026-10-01 17:31:33 -07:00
rotate_neon64.cc [libyuv] Keep LIBYUV_API in basic_types.h and remove legacy types and bool macros 2026-08-28 08:32:19 -07:00
rotate_neon.cc [libyuv] Keep LIBYUV_API in basic_types.h and remove legacy types and bool macros 2026-08-28 08:32:19 -07:00
rotate_sme.cc [libyuv] Keep LIBYUV_API in basic_types.h and remove legacy types and bool macros 2026-08-28 08:32:19 -07:00
rotate_win.cc Rotate intrinsics for Visual C, ROWWIN and 32 bit x86 2026-10-01 20:39:30 -07:00
rotate.cc Rotate intrinsics for Visual C, ROWWIN and 32 bit x86 2026-10-01 20:39:30 -07:00
row_any.cc ARGBToRGB24 AVX512 with tail masking 2026-09-29 16:15:44 -07:00
row_common.cc clang format and bump version 2026-09-28 10:42:45 -07:00
row_gcc.cc ARGBToRGB24 AVX512 with tail masking 2026-09-29 16:15:44 -07:00
row_lasx.cc ARGBMultiplyRow with rounding for AVX2 and RVV 2026-09-21 10:20:14 -07:00
row_lsx.cc clang format and bump version 2026-09-28 10:42:45 -07:00
row_neon64.cc clang format and bump version 2026-09-28 10:42:45 -07:00
row_neon.cc clang format and bump version 2026-09-28 10:42:45 -07:00
row_rvv.cc clang format and bump version 2026-09-28 10:42:45 -07:00
row_sme.cc Convert8To16 takes bits instead of scale. 2026-09-01 16:07:23 -07:00
row_sve.cc clang format and bump version 2026-09-28 10:42:45 -07:00
row_win.cc Fix _M_X86 to _M_IX86 2026-10-01 02:50:39 -07:00
scale_any.cc [libyuv] Enable LIBYUV_ENABLE_ROWWIN and MSAN_MEMSET for MSan builds 2026-09-28 10:49:58 -07:00
scale_argb.cc InterpolateRow_AVX512BW with tail masking 2026-09-29 11:22:47 -07:00
scale_common.cc InterpolateRow_AVX512BW with tail masking 2026-09-29 11:22:47 -07:00
scale_gcc.cc clang format and bump version 2026-09-28 10:42:45 -07:00
scale_lsx.cc DetilePlane and unittest for NEON 2022-01-31 20:05:55 +00:00
scale_neon64.cc Apply format with no code changes 2025-02-24 23:57:01 -08:00
scale_neon.cc Apply format with no code changes 2025-02-24 23:57:01 -08:00
scale_rgb.cc Fix Coverity Control flow issues (DEADCODE) 2026-07-01 10:39:22 -07:00
scale_rvv.cc RVV replace vnclipu.wi with vwaddu.vx and vnsrl.wi 2026-09-25 12:43:28 -07:00
scale_sme.cc Apply clang format 2025-01-02 13:31:20 -08:00
scale_uv.cc Add a box filter to ScaleUV 2026-10-02 15:37:21 -07:00
scale_win.cc BGRAToI420 use BgraConstants for a direct conversion using AVX512BW 2026-06-08 12:21:47 -07:00
scale.cc InterpolateRow_AVX512BW with tail masking 2026-09-29 11:22:47 -07:00
test.sh Optimze ABGRToI420 for AVX2 2020-06-04 18:24:45 +00:00
video_common.cc Lint cleanup after C99 change CL 2018-01-24 19:16:03 +00:00