mirror of
https://chromium.googlesource.com/libyuv/libyuv
synced 2026-06-15 08:26:06 +08:00
03d8b0990b
Replaced the 2-pass conversion (I420 -> ARGB -> RGB24/RAW) with a
highly optimized 1-pass AVX2 implementation. This avoids intermediate
stack buffering and significantly reduces memory bandwidth.
Implemented `I422ToRGB24Row_AVX2` in:
- `row_gcc.cc`: Inline assembly for GCC/Clang.
- `row_win.cc`: C++ intrinsics for MSVC (also verified with Clang).
Optimized the width alignment requirement: changed from 32-pixel to
16-pixel alignment in `convert_argb.cc` and `row_any.cc`. This allows
the optimized AVX2 path to be used for more common video resolutions.
Performance results (1080p, 100 iterations):
- C Reference: ~18.5 ms
- AVX2 2-Pass (Baseline): ~412 us (~45x speedup)
- AVX2 1-Pass (GCC Assembly): ~411 us (~s45x speedup)
- AVX2 1-Pass (Intrinsics): ~365 us (~50x speedup, 11% faster than asm)
Test: libyuv_unittest --gunit_filter=*I420ToRGB24*
Test: libyuv_unittest --gunit_filter=*I420ToRAW*
Bug: 42280902
Change-Id: I07c0505c95410ea16a6218c858844791a11ef073
14 lines
305 B
Plaintext
14 lines
305 B
Plaintext
Name: libyuv
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URL: https://chromium.googlesource.com/libyuv/libyuv/
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Version: 1949
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Revision: DEPS
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License: BSD-3-Clause
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License File: LICENSE
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Shipped: yes
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Security Critical: yes
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Update Mechanism: Manual
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Description:
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libyuv is an open source project that includes YUV conversion and scaling functionality.
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