Dees_Troy
51a0e82eb2
Pull in most TWRP sources Stub out partition management code Make it compile -- probably will not boot Kind of a mess but have to start somewhere
21 lines
1.1 KiB
Plaintext
21 lines
1.1 KiB
Plaintext
README-VeNum
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Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum
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Consumers are increasingly browsing Web based photo galleries incorporating
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high-resolution JPEG images with their mobile devices. These images are
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decoded by the mobile device, and typically also scaled down to fit the user's
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zoom selection on the device's browser.
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In order to improve both decode and download times, Qualcomm Innovation Center
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has optimized the JPEG library found on many common OS platforms such as Web
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OS, Android, and Chrome OS. Our team re-implemented several routines to utilize the
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DSP-like SIMD capabilities of the ARM NEON instruction set. These were then
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tuned and tested on Qualcomm's Snapdragon platform which implements the VeNum
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implementation of these same instructions.
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The specific areas of focus cover VeNum/NEON acceleration of Inverse Discrete
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Cosine Transform (iDCT) for 8x8, 4x4, 2x2, and 1x1 block sizes and YUV to RGB
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color space conversion. This resulted in a range of 18-32% improvement in JPEG
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decode and downscale times for images greater than 2Mpixels.
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