adding Blackfin swscale_bfin infrastructure, and the first swscale routine uyvy to yv12 video resampler


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rename attribute_unused to av_unused as it is declared in common.h
patch by Carl Eugen Hoyos cehoyos chez ag or at
original thread: [FFmpeg-devel] [PATCH] attribute_unused -> av_unused
date: 05/29/2007 01:23 PM



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This is 10x faster than the cooresponding C function.



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FFmpeg is pure C and not all public headers have the declarations.


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YUV2 -> RGB BGR for 565, 555 and 888 a.k.a. 24bit color.
Speed-up compared to C version compiled with -O3  187.28%
Patch by Marc Hoffman %mmh A pleasantst P com%
Original thread:
Date: May 9, 2007 2:46 AM
Subject: [FFmpeg-devel] PATCH BlackFin yuv2rgb color space conversion


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cosmetics: indentation after previous patch



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test if color conv fonction exists prior to using it



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patch by Marc Hoffman, mmh pleasantst com


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some SIMD functions to output wrong data.


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to plain C when width < unit size of assembly code.


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size of the units the MMX code processes


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size of the units the MMX code processes


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size of the units the MMX code processes


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The previous implementation segfaulted with MMX enabled when fed an image
smaller than the size of the units the MMX code processed. The new code:
- is faster for MMX, MMX2 and plain C
- processes small images correctly
- is LGPL



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