mirror of
https://chromium.googlesource.com/libyuv/libyuv
synced 2026-11-09 14:49:57 +08:00
38ca05f1eb
Correctness fixes:
- U010ToAB30 and U210ToAB30 swap U and V but passed
kYuv2020Constants; use kYvu2020Constants as I010ToAB30 does.
- H420ToAR30 passed kYvuH709Constants without swapping U and V,
so red and blue were swapped; use kYuvH709Constants.
- I420Blend with negative height flipped Y but not U and V.
- BlendPlaneRow_WASMSIMD processes 16 pixels per loop but was
dispatched for widths that are a multiple of 8.
- I420Blend used ScaleRowDown2Box_RVV for odd widths, reading 1
byte past the row. Add ScaleRowDown2Box_Odd_RVV.
- ConvertFromI420 to NV12/NV21/NV16 with odd width used a UV
stride of width, overlapping UV rows and writing 1 byte past
the plane. Use ((width + 1) / 2) * 2.
- ConvertToI420 (NV16/NV24) and ConvertToARGB (NV12/NV21/NV16/
NV24) computed the Y plane size with the aligned width; the Y
stride is src_width. NV24 UV stride is src_width * 2.
- I420Rect and I420Interpolate skipped a UV row for negative odd
heights.
- DetilePlane and DetilePlane_16 accepted tile_height 0, reading
past the source.
- Add null checks to NV12ToNV21, IxxxToPxxx, I422ToI210,
I422ToNV21, YUY2ToI420, UYVYToI420, AYUVToNV12, AYUVToNV21,
DetileSplitUVPlane and DetileToYUY2, and avoid pointer
arithmetic on optional NULL src_y/dst_y with negative height.
MT2TToP010 now returns -1 for NULL src_y with non-NULL dst_y.
- Replace unaligned uint32_t stores in row_common.cc with memcpy.
- Add LIBYUV_TARGET_AVX512VNNI to HammingDistance_AVX512VNNI so
GCC accepts the k1 clobber on non-AVX512 builds.
- Check kCpuHasWASMSIMD instead of kCpuHasWASM in scale.cc and
scale_uv.cc.
- Avoid the 16.16 fixed point NEON/LSX/RVV column scalers for
src_width >= 32768, matching the existing AVX2 guard.
Performance:
- NV24ToI420 uses InterpolateRow, ScaleUVRowDown2Linear and
SplitUVRow instead of a scalar loop (bit exact).
- Add HalfMergeUVRow_Any_NEON and MirrorSplitUVRow_Any_{NEON,
LSX,LASX,WASMSIMD} so non-multiple-of-16 widths use SIMD.
- Enable BlendPlaneRow_SSSE3/AVX2 for row_win builds.
- Add missing LSX/LASX/RVV/SME dispatch for YUY2ToY,
I422ToYUY2/UYVY, ARGBToY/UVMatrix, RAWToNVMatrix, AR64Shuffle,
ARGBSobelize and Convert16To8Row in I010ToNV12, and coalesce
rows in ARGBToI400Matrix.
Cleanup:
- UYVYToYRow_Any_AVX2 uses the same UVSHIFT/SBPP as YUY2.
- Add #ifdef HAS_* guards in compare_gcc.cc and row_gcc.cc.
- Remove unused clobbers and dead cnth/cmp/subs instructions in
row_neon.cc, row_neon64.cc, row_sve.h, row_sve.cc and
row_sme.cc, and order clobbers "memory", "cc" first.
- Re-enable the I420Blend_Any unit test.
Test: libyuv_unittest (x86-64 Release, rowwin, ASan, UBSan, MSan;
Arm64 SME, SVE2 and NEON on Samsung S26)
Bug: 579659306
Change-Id: Ic1afddbf961f7ef7deeba124a55907a31e09822d
Reviewed-on: https://chromium-review.googlesource.com/c/libyuv/libyuv/+/8702355
Reviewed-by: richard winterton <rrwinterton@gmail.com>
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| build_overrides | ||
| docs | ||
| include | ||
| infra/config | ||
| riscv_script | ||
| source | ||
| tools_libyuv | ||
| unit_test | ||
| util | ||
| .clang-format | ||
| .gitignore | ||
| .gn | ||
| Android.bp | ||
| Android.mk | ||
| AUTHORS | ||
| BUILD.bazel | ||
| BUILD.gn | ||
| CM_linux_packages.cmake | ||
| CMakeLists.txt | ||
| codereview.settings | ||
| DEPS | ||
| DIR_METADATA | ||
| download_vs_toolchain.py | ||
| GEMINI.md | ||
| libyuv.bzl | ||
| libyuv.gni | ||
| libyuv.gyp | ||
| libyuv.gypi | ||
| LICENSE | ||
| linux.mk | ||
| OWNERS | ||
| PATENTS | ||
| PRESUBMIT.py | ||
| public.mk | ||
| pylintrc | ||
| README.chromium | ||
| README.md | ||
| vpython.toml | ||
| vpython.toml.uv.lock | ||
| winarm.mk | ||
| WORKSPACE.bazel | ||
libyuv is an open source project that includes YUV scaling and conversion functionality.
- Scale YUV to prepare content for compression, with point, bilinear or box filter.
- Convert to YUV from webcam formats for compression.
- Convert to RGB formats for rendering/effects.
- Rotate by 90/180/270 degrees to adjust for mobile devices in portrait mode.
- Optimized for SSSE3/AVX2 on x86/x64.
- Optimized for Neon/SVE2/SME on Arm.
- Optimized for MSA on Mips.
- Optimized for RVV on RISC-V.
Development
See Getting started for instructions on how to get started developing.
You can also browse the docs directory for more documentation.