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U contributes to B and G. V contributes to R and G. By swapping U and V, they contribute to the opposite channels. Adjust the matrix so the U contribution is in the matrix location such that it till contribute to the new B channel and vice versa. This allows ABGR versions of YUV conversion to use the same low level code as ARGB, just using a different matrix and swapping U and V pointers. As a result the existing I444ToABGRRow functions are no longer needed and are removed. Previously this function was only Intel AVX2 optimized for Windwos. Now it is also optimized for Arm and GCC. ARMv7 Neon Was LibYUVConvertTest.I444ToABGR_Opt (75971 ms) Now LibYUVConvertTest.I444ToABGR_Opt (3672 ms) 20.6 times faster. R=xhwang@chromium.org BUG=libyuv:515 Review URL: https://codereview.chromium.org/1414133006 .
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203 B
Plaintext
9 lines
203 B
Plaintext
Name: libyuv
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URL: http://code.google.com/p/libyuv/
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Version: 1525
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License: BSD
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License File: LICENSE
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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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