| 1 | /***************************************************************************** |
| 2 | * Copyright (C) 2013 x265 project |
| 3 | * |
| 4 | * Authors: Deepthi Nandakumar <deepthi@multicorewareinc.com> |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify |
| 7 | * it under the terms of the GNU General Public License as published by |
| 8 | * the Free Software Foundation; either version 2 of the License, or |
| 9 | * (at your option) any later version. |
| 10 | * |
| 11 | * This program is distributed in the hope that it will be useful, |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | * GNU General Public License for more details. |
| 15 | * |
| 16 | * You should have received a copy of the GNU General Public License |
| 17 | * along with this program; if not, write to the Free Software |
| 18 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02111, USA. |
| 19 | * |
| 20 | * This program is also available under a commercial proprietary license. |
| 21 | * For more information, contact us at license @ x265.com. |
| 22 | *****************************************************************************/ |
| 23 | |
| 24 | #ifndef X265_PREDICT_H |
| 25 | #define X265_PREDICT_H |
| 26 | |
| 27 | #include "common.h" |
| 28 | #include "frame.h" |
| 29 | #include "quant.h" |
| 30 | #include "shortyuv.h" |
| 31 | #include "yuv.h" |
| 32 | |
| 33 | namespace x265 { |
| 34 | |
| 35 | class CUData; |
| 36 | class Slice; |
| 37 | struct CUGeom; |
| 38 | |
| 39 | class Predict |
| 40 | { |
| 41 | public: |
| 42 | |
| 43 | enum { ADI_BUF_STRIDE = (2 * MAX_CU_SIZE + 1 + 15) }; // alignment to 16 bytes |
| 44 | |
| 45 | /* Weighted prediction scaling values built from slice parameters (bitdepth scaled) */ |
| 46 | struct WeightValues |
| 47 | { |
| 48 | int w, o, offset, shift, round; |
| 49 | }; |
| 50 | |
| 51 | struct IntraNeighbors |
| 52 | { |
| 53 | int numIntraNeighbor; |
| 54 | int totalUnits; |
| 55 | int aboveUnits; |
| 56 | int leftUnits; |
| 57 | int unitWidth; |
| 58 | int unitHeight; |
| 59 | int tuSize; |
| 60 | uint32_t log2TrSize; |
| 61 | bool bNeighborFlags[4 * MAX_NUM_SPU_W + 1]; |
| 62 | }; |
| 63 | |
| 64 | ShortYuv m_predShortYuv[2]; /* temporary storage for weighted prediction */ |
| 65 | int16_t* m_immedVals; |
| 66 | |
| 67 | /* Intra prediction buffers */ |
| 68 | pixel* m_predBuf; |
| 69 | pixel* m_refAbove; |
| 70 | pixel* m_refAboveFlt; |
| 71 | pixel* m_refLeft; |
| 72 | pixel* m_refLeftFlt; |
| 73 | |
| 74 | /* Slice information */ |
| 75 | const Slice* m_predSlice; |
| 76 | int m_csp; |
| 77 | int m_hChromaShift; |
| 78 | int m_vChromaShift; |
| 79 | |
| 80 | /* cached CU information for prediction */ |
| 81 | uint32_t m_ctuAddr; // raster index of current CTU within its picture |
| 82 | uint32_t m_cuAbsPartIdx; // z-order index of current CU within its CTU |
| 83 | uint32_t m_puAbsPartIdx; // z-order index of current PU with its CU |
| 84 | int m_puWidth; |
| 85 | int m_puHeight; |
| 86 | int m_refIdx0; |
| 87 | int m_refIdx1; |
| 88 | |
| 89 | /* TODO: Need to investigate clipping while writing into the TComDataCU fields itself */ |
| 90 | MV m_clippedMv[2]; |
| 91 | |
| 92 | Predict(); |
| 93 | ~Predict(); |
| 94 | |
| 95 | bool allocBuffers(int csp); |
| 96 | |
| 97 | // motion compensation functions |
| 98 | void predInterLumaPixel(Yuv& dstYuv, const PicYuv& refPic, const MV& mv) const; |
| 99 | void predInterChromaPixel(Yuv& dstYuv, const PicYuv& refPic, const MV& mv) const; |
| 100 | |
| 101 | void predInterLumaShort(ShortYuv& dstSYuv, const PicYuv& refPic, const MV& mv) const; |
| 102 | void predInterChromaShort(ShortYuv& dstSYuv, const PicYuv& refPic, const MV& mv) const; |
| 103 | |
| 104 | void addWeightBi(Yuv& predYuv, const ShortYuv& srcYuv0, const ShortYuv& srcYuv1, const WeightValues wp0[3], const WeightValues wp1[3], bool bLuma, bool bChroma) const; |
| 105 | void addWeightUni(Yuv& predYuv, const ShortYuv& srcYuv, const WeightValues wp[3], bool bLuma, bool bChroma) const; |
| 106 | |
| 107 | /* Intra prediction helper functions */ |
| 108 | static void initIntraNeighbors(const CUData& cu, uint32_t zOrderIdxInPart, uint32_t partDepth, bool isLuma, IntraNeighbors *IntraNeighbors); |
| 109 | static void fillReferenceSamples(const pixel* adiOrigin, intptr_t picStride, pixel* adiRef, const IntraNeighbors& intraNeighbors); |
| 110 | |
| 111 | static bool isAboveLeftAvailable(const CUData& cu, uint32_t partIdxLT); |
| 112 | static int isAboveAvailable(const CUData& cu, uint32_t partIdxLT, uint32_t partIdxRT, bool* bValidFlags); |
| 113 | static int isLeftAvailable(const CUData& cu, uint32_t partIdxLT, uint32_t partIdxLB, bool* bValidFlags); |
| 114 | static int isAboveRightAvailable(const CUData& cu, uint32_t partIdxLT, uint32_t partIdxRT, bool* bValidFlags); |
| 115 | static int isBelowLeftAvailable(const CUData& cu, uint32_t partIdxLT, uint32_t partIdxLB, bool* bValidFlags); |
| 116 | |
| 117 | public: |
| 118 | |
| 119 | /* prepMotionCompensation needs to be called to prepare MC with CU-relevant data */ |
| 120 | void initMotionCompensation(const CUData& cu, const CUGeom& cuGeom, int partIdx); |
| 121 | void prepMotionCompensation(const CUData& cu, const CUGeom& cuGeom, int partIdx); |
| 122 | void motionCompensation(Yuv& predYuv, bool bLuma, bool bChroma); |
| 123 | |
| 124 | /* Angular Intra */ |
| 125 | void predIntraLumaAng(uint32_t dirMode, pixel* pred, intptr_t stride, uint32_t log2TrSize); |
| 126 | void predIntraChromaAng(pixel* src, uint32_t dirMode, pixel* pred, intptr_t stride, uint32_t log2TrSizeC, int chFmt); |
| 127 | |
| 128 | void initAdiPattern(const CUData& cu, const CUGeom& cuGeom, uint32_t absPartIdx, uint32_t partDepth, int dirMode); |
| 129 | void initAdiPatternChroma(const CUData& cu, const CUGeom& cuGeom, uint32_t absPartIdx, uint32_t partDepth, uint32_t chromaId); |
| 130 | pixel* getAdiChromaBuf(uint32_t chromaId, int tuSize) |
| 131 | { |
| 132 | return m_predBuf + (chromaId == 1 ? 0 : 2 * ADI_BUF_STRIDE * (tuSize * 2 + 1)); |
| 133 | } |
| 134 | }; |
| 135 | } |
| 136 | |
| 137 | #endif // ifndef X265_PREDICT_H |