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https://chromium.googlesource.com/libyuv/libyuv
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aed1cc94c1
git-svn-id: http://libyuv.googlecode.com/svn/trunk@2 16f28f9a-4ce2-e073-06de-1de4eb20be90
57 lines
1.7 KiB
C++
57 lines
1.7 KiB
C++
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#ifndef LIBYUV_INCLUDE_SCALE_H_
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#define LIBYUV_INCLUDE_SCALE_H_
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#include "basic_types.h"
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#if defined(_MSC_VER)
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#define ALIGN16(var) __declspec(align(16)) var
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#else
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#define ALIGN16(var) var __attribute__((aligned(16)))
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#endif
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namespace libyuv
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{
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class YuvScaler {
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public:
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// Scales a YUV 4:2:0 image from the input width and height to the
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// output width and height. If outh_offset is nonzero, the image is
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// offset by that many pixels and stretched to (outh - outh_offset * 2)
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// pixels high, instead of outh.
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// If interpolate is not set, a simple nearest-neighbor algorithm is
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// used. This produces basic (blocky) quality at the fastest speed.
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// If interpolate is set, interpolation is used to produce a better
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// quality image, at the expense of speed.
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// Returns true if successful.
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static bool Scale(const uint8 *in, int32 inw, int32 inh,
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uint8 *out, int32 outw, int32 outh, int32 outh_offset,
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bool interpolate);
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// Same, but specified in terms of each plane location and stride.
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static bool Scale(const uint8 *inY, const uint8 *inU, const uint8 *inV,
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int32 istrideY, int32 istrideU, int32 istrideV,
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int32 iwidth, int32 iheight,
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uint8 *outY, uint8 *outU, uint8 *outV,
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int32 ostrideY, int32 ostrideU, int32 ostrideV,
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int32 owidth, int32 oheight,
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bool interpolate);
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// For testing, allow disabling of optimizations.
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static void SetUseReferenceImpl(bool use) { use_reference_impl_ = use; }
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private:
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static bool use_reference_impl_;
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DISALLOW_IMPLICIT_CONSTRUCTORS(YuvScaler);
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};
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} // namespace libyuv
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#endif // LIBYUV_INCLUDE_SCALE_H_
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