Refactor CalcFrameSsim to decompose overlapping 8x8 SSIM windows
(stepped by 4 pixels horizontally and vertically) into non-overlapping
4x4 pixel tiles across a 2-row rotating buffer (row0, row1), reducing
memory reads and pixel accumulation work by 4x:
- Ssim4x4Row_* computes 4 uint32_t statistics {sum_a, sum_b, sum_sq_ab,
sum_axb} per 4x4 pixel tile across a 4-row strip (also sized to fit
future 10-bit/12-bit formats like I010 without uint32_t overflow).
- SsimWindowRow_C combines top and bottom 4x4 tile strips across
adjacent horizontal pairs and returns the exact double SSIM sum,
producing bit-identical results to Ssim8x8_C.
- CalcFrameSsim rotates row0 and row1 (with thread-local buffers and
continuity tracking under _OPENMP) and falls back to Ssim8x8_C only if
buffer allocation fails.
- Implement Ssim4x4Row across all SIMD architectures:
- x86/x64: Ssim4x4Row_SSE2, Ssim4x4Row_AVX2, and Ssim4x4Row_AVX512BW
(with k-masked tail handling for 4..60 pixels) in both
compare_gcc.cc and compare_win.cc.
- ARM: Ssim4x4Row_NEON (compare_neon.cc, compare_neon64.cc),
Ssim4x4Row_NEON_DotProd (compare_neon64.cc), Ssim4x4Row_SVE2
(row_sve.h, row_sve.cc), and Ssim4x4Row_SME (row_sme.cc).
- RISC-V: Ssim4x4Row_RVV (row_rvv.cc).
- LoongArch: Ssim4x4Row_LSX (row_lsx.cc) and Ssim4x4Row_LASX
(row_lasx.cc).
- WebAssembly: Ssim4x4Row_WASMSIMD (compare_wasm.cc).
- Enable BenchmarkSsim_Opt and add BenchmarkSsim_Unaligned and
TestSsimAnyWidth in unit_test/compare_test.cc.
R=rrwinterton@gmail.com
Bug: None
Test: out/Release/libyuv_unittest --gtest_filter=*Ssim*
Change-Id: Ibb95ae74424ecdda073ab7ab10ab1cf610b121b6
Reduces include/libyuv/basic_types.h to only define LIBYUV_API.
Directly includes <stdint.h> and <stddef.h> where needed in public
headers.
Replaces LIBYUV_BOOL, LIBYUV_FALSE, and LIBYUV_TRUE with C++ bool,
true, and false in C++ code (MJpegDecoder, unit tests) and int (0, 1)
for C API functions.
Updates documentation and unit tests.
Test: ninja -C out/Release libyuv_unittest && ./out/Release/libyuv_unittest --gtest_filter=*
Change-Id: I2d58e872f0f976263bcda546dcc3b1b5f7e53d58
TAG=agy
CONV=2730bc56-93ff-48ed-b615-dcde1b834394
Reviewed-on: https://chromium-review.googlesource.com/c/libyuv/libyuv/+/8280662
Commit-Queue: Wan-Teh Chang <wtc@google.com>
Reviewed-by: Wan-Teh Chang <wtc@google.com>
When casting a const value, ensure the cast is const as well.
BUG=webm:1509
Change-Id: I5b597fdcc148d111e9824bc7cf918fc5f24e970f
Reviewed-on: https://chromium-review.googlesource.com/996553
Reviewed-by: Frank Barchard <fbarchard@chromium.org>
Commit-Queue: Frank Barchard <fbarchard@chromium.org>
If length of HammingDistance was not a multiple of 4,
the result was incorrect. The old tests did not catch this
so a new test is done to count 1s.
Bug: libyuv:740
Test: LibYUVCompareTest.TestHammingDistance
Change-Id: I93db5437821c597f1f162ac263d4a594bb83231f
Reviewed-on: https://chromium-review.googlesource.com/699614
Reviewed-by: richard winterton <rrwinterton@gmail.com>
Reviewed-by: Cheng Wang <wangcheng@google.com>
Reviewed-by: Frank Barchard <fbarchard@google.com>
Commit-Queue: Frank Barchard <fbarchard@google.com>
BUG=libyuv:703
TEST=compile and disassemble. see registers used not stack.
R=wangcheng@google.com
Change-Id: Iaa07ee5d0c35252994491bb2868276e161149efd
Reviewed-on: https://chromium-review.googlesource.com/500427
Commit-Queue: Frank Barchard <fbarchard@google.com>
Reviewed-by: Cheng Wang <wangcheng@google.com>
BUG=libyuv:701
TEST=built and disassembled for aarch64
R=kjellander@chromium.org
Change-Id: I7712b1c7934e5dfb55fda1fa7c8405c32d6964ce
Reviewed-on: https://chromium-review.googlesource.com/495327
Reviewed-by: Henrik Kjellander <kjellander@chromium.org>
Reviewed-by: Cheng Wang <wangcheng@google.com>
clangcl use compare_win for 32 bit, allowing fallback and enabling avx2 code for clang.
move defines/protos to compare_row.h
fix issue with odd width ARGBCopyAlpha functions by copying destination to temp buffer, then doing alpha copy, then copy back to destination.
R=harryjin@google.comTBR=harryjin@google.com
BUG=libyuv:484
Review URL: https://webrtc-codereview.appspot.com/59379004.
