chromaResample.h

   1 /* ***** BEGIN LICENSE BLOCK *****
   2  *
   3  * $Id$
   4  *
   5  * The MIT License
   6  *
   7  * Copyright (c) 2008 BBC Research
   8  *
   9  * Permission is hereby granted, free of charge, to any person obtaining a copy
  10  * of this software and associated documentation files (the "Software"), to deal
  11  * in the Software without restriction, including without limitation the rights
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  13  * copies of the Software, and to permit persons to whom the Software is
  14  * furnished to do so, subject to the following conditions:
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  16  * The above copyright notice and this permission notice shall be included in
  17  * all copies or substantial portions of the Software.
  18  *
  19  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  20  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  21  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  22  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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  24  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  25  * THE SOFTWARE.
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  27  * ***** END LICENSE BLOCK ***** */
  28
  29 #ifndef __CHROMARESAMPLE_H
  30 #define __CHROMARESAMPLE_H
  31
  32 #include "rawFrame.h"
  33
  34 class ChromaResample {
  35 public:
  36
  37         ChromaResample(int inWidth, int inHeight, RawFrame::Chroma destType) :
  38                 _width(inWidth), _height(inHeight), _resampled(inWidth, inHeight,
  39                                                                destType)
  40         {
  41         };
  42
  43         const RawFrame& process(const RawFrame &src);
  44         void process_ext(const RawFrame &src, RawFrame& dest);
  45
  46 protected:
  47
  48         void copyArray(const Array2d<int>& src, Array2d<int>& dest);
  49
  50         //frame conversion functions
  51         void to444(const RawFrame& src, RawFrame& dest);
  52         void to422(const RawFrame& src, RawFrame& dest);
  53         void to420(const RawFrame& src, RawFrame& dest);
  54         void to411(const RawFrame& src, RawFrame& dest);
  55         void toYonly(const RawFrame& src, RawFrame& dest);
  56
  57         //array interpolation / subsampling functions
  58         void horizSubsample(const Array2d<int>& in, Array2d<int>& out);
  59         void vertSubsample(const Array2d<int>& in, Array2d<int>& out);
  60         void horizInterp(const Array2d<int>& in, Array2d<int>& out);
  61         void vertInterp(const Array2d<int>& in, Array2d<int>& out);
  62
  63         /* input size */
  64         const int _width;
  65         const int _height;
  66
  67         /* output */
  68         RawFrame _resampled;
  69 };
  70
  71 #endif