34 lines
1.3 KiB
C
34 lines
1.3 KiB
C
#ifndef YUV_RGB_H_
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#define YUV_RGB_H_
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// Copyright 2016 Adrien Descamps
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// Distributed under BSD 3-Clause License
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// Provide optimized functions to convert images from 8bits yuv420 to rgb24 format
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// There are a few slightly different variations of the YCbCr color space with different parameters that
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// change the conversion matrix.
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// The three most common YCbCr color space, defined by BT.601, BT.709 and JPEG standard are implemented here.
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// See the respective standards for details
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// The matrix values used are derived from http://www.equasys.de/colorconversion.html
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// YUV420 is stored as three separate channels, with U and V (Cb and Cr) subsampled by a 2 factor
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// For conversion from yuv to rgb, no interpolation is done, and the same UV value are used for 4 rgb pixels. This
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// is suboptimal for image quality, but by far the fastest method.
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// For all methods, width and height should be even, if not, the last row/column of the result image won't be affected.
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// For sse methods, if the width if not divisable by 32, the last (width%32) pixels of each line won't be affected.
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/*#include <stdint.h>*/
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// yuv to rgb, standard c implementation
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#include "yuv_rgb_std.h"
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// yuv to rgb, sse2 implementation
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#include "yuv_rgb_sse.h"
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// yuv to rgb, lsx implementation
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#include "yuv_rgb_lsx.h"
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#endif /* YUV_RGB_H_ */
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