643a21b326
>From the 1.5-b1 release notes: Added ARM 64-bit (ARMv8) NEON SIMD implementations of the commonly-used compression algorithms (including the slow integer forward DCT and h2v2 & h2v1 downsampling algorithms, which are not accelerated in the 32-bit NEON implementation.) This speeds up the compression of full-color JPEGs by about 75% on average on a Cavium ThunderX processor and by about 2-2.5x on average on Cortex-A53 and Cortex-A57 cores. Add it unconditionally for all aarch64 cores, as neon support is required for all "standard" ARMv8 implementations. If an ARMv8 implementation w/o NEON ever shows up, then we will need to add a BR2_AARCH64_CPU_HAS_NEON and handle it like ARM. Signed-off-by: Peter Korsgaard <peter@korsgaard.com> Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
51 lines
1.1 KiB
Plaintext
51 lines
1.1 KiB
Plaintext
config BR2_PACKAGE_JPEG
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bool "jpeg support"
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help
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Select the desired JPEG library provider.
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# jpeg-turbo has simd support for some architectures
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config BR2_PACKAGE_JPEG_SIMD_SUPPORT
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bool
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default y if BR2_X86_CPU_HAS_MMX || BR2_ARM_CPU_HAS_NEON || \
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BR2_POWERPC_CPU_HAS_ALTIVEC
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BR2_aarch64 || BR2_aarch64_be
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if BR2_PACKAGE_JPEG
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choice
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prompt "jpeg variant"
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default BR2_PACKAGE_JPEG_TURBO if BR2_PACKAGE_JPEG_SIMD_SUPPORT
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help
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Select the normal libjpeg or libjpeg-turbo.
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config BR2_PACKAGE_LIBJPEG
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bool "jpeg"
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select BR2_PACKAGE_HAS_JPEG
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help
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The ubiquitous C library for manipulating JPEG images.
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http://www.ijg.org/
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config BR2_PACKAGE_JPEG_TURBO
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bool "jpeg-turbo"
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select BR2_PACKAGE_HAS_JPEG
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help
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Libjpeg-turbo is a derivative of libjpeg that uses SIMD
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instructions (MMX, SSE2, NEON) to accelerate baseline JPEG
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compression and decompression on x86, x86-64, and ARM
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systems.
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http://www.libjpeg-turbo.org
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endchoice
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config BR2_PACKAGE_HAS_JPEG
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bool
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config BR2_PACKAGE_PROVIDES_JPEG
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string
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default "libjpeg" if BR2_PACKAGE_LIBJPEG
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default "jpeg-turbo" if BR2_PACKAGE_JPEG_TURBO
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endif
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