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George Steed cce8950816 [AArch64] Remove unused SVE INDEX instrs from NV{12,21} kernels 
When reading subsampled UV data in NV{12,21} we previously needed to
permute the data to both (a) duplicate each element into the
corresponding pair of lanes for the Y elements; and (b) arrange the UV
components in the correct lanes. This was done in a vector-length
agnostic way by generating the permute indices dynamically at runtime
through an SVE INDEX instruction.

Now that we are using the READNV_SVE_2X macro everywhere these
instructions are now redundant: the multiplications are done on the
subsampled UV data before the duplication and the conversion macro takes
arguments that adjust whether we need to operate on the even or odd
lanes of the vector.

Since the permute indices generated by these INDEX instructions are now
unused, remove them.

Change-Id: I3298a83aadfda52c4cc89bc4fd6518b06765a187
Reviewed-on: https://chromium-review.googlesource.com/c/libyuv/libyuv/+/6089957
Reviewed-by: Justin Green <greenjustin@google.com>
Reviewed-by: Frank Barchard <fbarchard@chromium.org>
2024-12-26 14:47:00 -08:00
build_overrides Define enable_safe_libcxx in build_overrides/build.gni. 2023-05-03 06:08:40 +00:00
docs Update README.md and environment_variables.md for Arm 2024-09-20 00:29:33 +00:00
include [AArch64] Remove unused SVE INDEX instrs from NV{12,21} kernels 2024-12-26 14:47:00 -08:00
infra/config Remove .vpython. 2024-12-19 08:35:12 -08:00
riscv_script Support RVV v0.12 intrinsics for row_rvv.cc & scale_rvv.cc 2024-06-17 18:01:49 +00:00
source [AArch64] Remove unused variables in HalfRow_{16To8,16}_SME 2024-12-13 08:00:58 -08:00
tools_libyuv Bring in changes from WebRTC autoroller (2) 2024-12-18 07:44:35 -08:00
unit_test Free dst_c, dst_opt buffers in TestHalfFloatPlane 2024-12-13 08:28:17 -08:00
util Add CopyPlane_Unaligned, _Any and _Invert tests/benchmarksCpuId test 2024-11-19 23:53:05 +00:00
.clang-format clang-format libyuv 2016-11-07 17:37:23 -08:00
.gitignore DetilePlane and unittest for NEON 2022-01-31 20:05:55 +00:00
.gn Roll chromium_revision 829c6df33d..7d683aeda8 (945687:1050091) 2022-09-22 14:56:57 +00:00
.vpython3 Update vpython3 urllib3 version and add brotli. 2024-12-18 05:18:50 -08:00
Android.bp Split scale_test and scale_plane_test to allow building on small devices 2023-12-09 18:39:41 +00:00
Android.mk Split scale_test and scale_plane_test to allow building on small devices 2023-12-09 18:39:41 +00:00
AUTHORS [DEPS] Remove cleanup_links pre_deps_hooks 2024-04-08 15:47:48 +00:00
BUILD.gn Use PIE when compiling tests on Linux. 2024-12-19 09:16:10 -08:00
CM_linux_packages.cmake Use grep extended regex for version 2024-11-13 02:11:17 +00:00
CMakeLists.txt Fix bugs in ARGBAttenuateRow_LASX/LSX function 2024-11-30 23:09:04 +00:00
codereview.settings [infra] remove no longer supported git cl upload setting. 2021-04-28 12:47:52 +00:00
DEPS Add hook to fetch reclient config files 2024-12-03 09:24:16 +00:00
DIR_METADATA Move metadata in OWNERS files to DIR_METADATA files 2021-02-09 19:34:43 +00:00
download_vs_toolchain.py Update pylintrc to a pep-8 like style 2024-12-18 05:38:56 -08:00
libyuv.gni Revert "Do not enable libyuv_use_sme for is_android" 2024-10-15 18:20:36 +00:00
libyuv.gyp Add libyuv.gyp build files 2022-03-21 23:48:16 +00:00
libyuv.gypi Fix missing headers in GN/GYP build files 2024-04-01 09:19:24 +00:00
LICENSE Update Copyright notice to follow new chromium conventions. 2012-08-08 19:04:24 +00:00
linux.mk Split convert_test and convert_argb_test to allow building on small systems that run out of memory compiling unittests. 2023-12-08 13:39:56 +00:00
OWNERS add jansson@google.com to infra owners to cover when Mirko is OOO 2022-10-28 09:46:02 +00:00
PATENTS LibYuv: Adding PATENT and LICENSE files 2011-10-25 16:15:49 +00:00
PRESUBMIT.py Update pylintrc to a pep-8 like style 2024-12-18 05:38:56 -08:00
public.mk use unix line endings 2018-06-20 23:19:59 +00:00
pylintrc Update pylintrc to a pep-8 like style 2024-12-18 05:38:56 -08:00
README.chromium CpuId test FSMR - Fast Short Rep Movsb 2024-11-18 17:56:45 +00:00
README.md Update README.md and environment_variables.md for Arm 2024-09-20 00:29:33 +00:00
winarm.mk NV12 Copy, include scale_uv.h 2020-12-08 18:54:16 +00:00

README.md

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.