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1 /* The copyright in this software is being made available under the BSD
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2 * License, included below. This software may be subject to other third party
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3 * and contributor rights, including patent rights, and no such rights are
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4 * granted under this license.
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5 *
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6 * Copyright (c) 2010-2014, ITU/ISO/IEC
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7 * All rights reserved.
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8 *
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9 * Redistribution and use in source and binary forms, with or without
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10 * modification, are permitted provided that the following conditions are met:
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11 *
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12 * * Redistributions of source code must retain the above copyright notice,
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13 * this list of conditions and the following disclaimer.
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14 * * Redistributions in binary form must reproduce the above copyright notice,
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15 * this list of conditions and the following disclaimer in the documentation
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16 * and/or other materials provided with the distribution.
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17 * * Neither the name of the ITU/ISO/IEC nor the names of its contributors may
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18 * be used to endorse or promote products derived from this software without
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19 * specific prior written permission.
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20 *
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21 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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22 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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24 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS
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25 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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26 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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27 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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28 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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29 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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30 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
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31 * THE POSSIBILITY OF SUCH DAMAGE.
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32 */
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33
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34 /**
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35 * \file
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36 * \brief Declaration of TComInterpolationFilter class
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37 */
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38
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39 #ifndef __TCOMINTERPOLATIONFILTER__
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40 #define __TCOMINTERPOLATIONFILTER__
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41
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42 #include "TypeDef.h"
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43
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44 //! \ingroup TLibCommon
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45 //! \{
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46
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47 #define NTAPS_LUMA 8 ///< Number of taps for luma
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48 #define NTAPS_CHROMA 4 ///< Number of taps for chroma
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49 #define IF_INTERNAL_PREC 14 ///< Number of bits for internal precision
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50 #define IF_FILTER_PREC 6 ///< Log2 of sum of filter taps
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51 #define IF_INTERNAL_OFFS (1<<(IF_INTERNAL_PREC-1)) ///< Offset used internally
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52
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53 /**
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54 * \brief Interpolation filter class
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55 */
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56 class TComInterpolationFilter
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57 {
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58 static const TFilterCoeff m_lumaFilter[LUMA_INTERPOLATION_FILTER_SUB_SAMPLE_POSITIONS][NTAPS_LUMA]; ///< Luma filter taps
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59 static const TFilterCoeff m_chromaFilter[CHROMA_INTERPOLATION_FILTER_SUB_SAMPLE_POSITIONS][NTAPS_CHROMA]; ///< Chroma filter taps
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60
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61 static Void filterCopy(Int bitDepth, const Pel *src, Int srcStride, Pel *dst, Int dstStride, Int width, Int height, Bool isFirst, Bool isLast);
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62
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63 template<Int N, Bool isVertical, Bool isFirst, Bool isLast>
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64 static Void filter(Int bitDepth, Pel const *src, Int srcStride, Pel *dst, Int dstStride, Int width, Int height, TFilterCoeff const *coeff);
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65
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66 template<Int N>
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67 static Void filterHor(Int bitDepth, Pel *src, Int srcStride, Pel *dst, Int dstStride, Int width, Int height, Bool isLast, TFilterCoeff const *coeff);
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68 template<Int N>
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69 static Void filterVer(Int bitDepth, Pel *src, Int srcStride, Pel *dst, Int dstStride, Int width, Int height, Bool isFirst, Bool isLast, TFilterCoeff const *coeff);
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70
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71 public:
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72 TComInterpolationFilter() {}
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73 ~TComInterpolationFilter() {}
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74
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75 Void filterHor(const ComponentID compID, Pel *src, Int srcStride, Pel *dst, Int dstStride, Int width, Int height, Int frac, Bool isLast, const ChromaFormat fmt );
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76 Void filterVer(const ComponentID compID, Pel *src, Int srcStride, Pel *dst, Int dstStride, Int width, Int height, Int frac, Bool isFirst, Bool isLast, const ChromaFormat fmt );
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77 };
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78
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79 //! \}
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80
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81 #endif
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