forked from mirror/libbpg
168 lines
8.6 KiB
C
168 lines
8.6 KiB
C
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/* The copyright in this software is being made available under the BSD
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* License, included below. This software may be subject to other third party
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* and contributor rights, including patent rights, and no such rights are
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* granted under this license.
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*
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* Copyright (c) 2010-2014, ITU/ISO/IEC
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* * Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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* * Neither the name of the ITU/ISO/IEC nor the names of its contributors may
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* be used to endorse or promote products derived from this software without
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* specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
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* THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef __TCOMTU__
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#define __TCOMTU__
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class TComTU; // forward declaration
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#include "CommonDef.h"
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#include "TComRectangle.h"
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#include "TComChromaFormat.h"
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class TComDataCU; // forward declaration
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//----------------------------------------------------------------------------------------------------------------------
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class TComTU
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{
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public:
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typedef enum TU_SPLIT_MODE { DONT_SPLIT=0, VERTICAL_SPLIT=1, QUAD_SPLIT=2, NUMBER_OF_SPLIT_MODES=3 } SPLIT_MODE;
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static const UInt NUMBER_OF_SECTIONS[NUMBER_OF_SPLIT_MODES];
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protected:
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ChromaFormat mChromaFormat;
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Bool mbProcessLastOfLevel; // if true, then if size n/2 x n/2 is invalid, the nxn block for a channel is processed only for the last block, not the first.
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UInt mCuDepth;
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UInt mTrDepthRelCU[MAX_NUM_COMPONENT];
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UInt mSection;
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TU_SPLIT_MODE mSplitMode;
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TComRectangle mRect[MAX_NUM_COMPONENT];
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Bool mCodeAll[MAX_NUM_COMPONENT];
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UInt mOrigWidth[MAX_NUM_COMPONENT];
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UInt mOffsets[MAX_NUM_COMPONENT];
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UInt mAbsPartIdxCU;
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UInt mAbsPartIdxTURelCU;
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UInt mAbsPartIdxStep;
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TComDataCU *mpcCU;
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UInt mLog2TrLumaSize;
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TComTU *mpParent;
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TComTU(const TComTU &); // not defined - do not use
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TComTU&operator=(const TComTU &); // not defined - do not use
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public:
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TComTU( TComDataCU *pcCU,
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const UInt absPartIdxCU,
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const UInt cuDepth,
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const UInt initTrDepthRelCU);
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protected:
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TComTU( TComTU &parentLevel,
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const Bool bProcessLastOfLevel,
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const TU_SPLIT_MODE splitMode = QUAD_SPLIT,
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const Bool splitAtCurrentDepth = false,
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const ComponentID absPartIdxSourceComponent = COMPONENT_Y
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);
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public:
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TComTU *Parent() { return mpParent; }
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const TComTU *Parent() const { return mpParent; }
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UInt getCoefficientOffset(const ComponentID compID) const { return mOffsets[compID]; }
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const TComRectangle &getRect(const ComponentID compID) const { return mRect[compID]; }
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Bool ProcessingAllQuadrants(const ComponentID compID) const { return mCodeAll[compID]; }
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Bool ProcessComponentSection(const ComponentID compID) const { return mRect[compID].width != 0; }
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Bool ProcessChannelSection(const ChannelType chType) const { return mRect[chType].width != 0; }
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UInt GetSectionNumber() const { return mSection; }
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UInt getCUDepth() const { return mCuDepth; }
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UInt GetTransformDepthTotal() const { return mCuDepth+GetTransformDepthRel(); }
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UInt GetTransformDepthTotalAdj(const ComponentID compID) const { return mCuDepth+GetTransformDepthRelAdj(compID); }
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UInt GetTransformDepthRel() const { return mTrDepthRelCU[COMPONENT_Y]; }
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UInt GetTransformDepthRelAdj(const ComponentID compID) const { return mTrDepthRelCU[compID]; }
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UInt GetTransformDepthRelAdj(const ChannelType chType) const
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{
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assert(isLuma(chType) || (mTrDepthRelCU[COMPONENT_Cb] == mTrDepthRelCU[COMPONENT_Cr]));
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return mTrDepthRelCU[isLuma(chType) ? COMPONENT_Y : COMPONENT_Cb];
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}
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UInt GetAbsPartIdxCU() const { return mAbsPartIdxCU; }
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UInt GetRelPartIdxTU() const { return mAbsPartIdxTURelCU; }
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UInt GetRelPartIdxTU(const ComponentID compID) const { return ProcessingAllQuadrants(compID) ? mAbsPartIdxTURelCU : (mAbsPartIdxTURelCU & (~0x3)); }
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UInt GetAbsPartIdxTU() const { return GetAbsPartIdxCU() + GetRelPartIdxTU(); }
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UInt GetAbsPartIdxTU(const ComponentID compID) const { return GetAbsPartIdxCU() + GetRelPartIdxTU(compID); }
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UInt GetAbsPartIdxNumParts() const { return mAbsPartIdxStep; }
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UInt GetAbsPartIdxNumParts(const ComponentID compID) const { return ProcessingAllQuadrants(compID) ? mAbsPartIdxStep : (mAbsPartIdxStep * NUMBER_OF_SECTIONS[mSplitMode]); }
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ChromaFormat GetChromaFormat() const { return mChromaFormat; }
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TComDataCU *getCU() { return mpcCU; }
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const TComDataCU *getCU() const { return mpcCU; }
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Bool IsLastSection() const { return mSection+1>=((1<<mSplitMode)); }
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UInt GetLog2LumaTrSize() const { return mLog2TrLumaSize; }
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UInt GetEquivalentLog2TrSize(const ComponentID compID) const;
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TU_SPLIT_MODE GetSplitMode() const { return mSplitMode; }
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Bool useDST(const ComponentID compID);
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Bool isNonTransformedResidualRotated(const ComponentID compID);
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UInt getGolombRiceStatisticsIndex(const ComponentID compID);
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};
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class TComTURecurse : public TComTU
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{
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public:
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TComTURecurse( TComDataCU *pcCU,
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const UInt absPartIdxCU,
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const UInt forcedDepthOfCU)
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: TComTU(pcCU, absPartIdxCU, forcedDepthOfCU, 0) { }
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TComTURecurse( TComDataCU *pcCU,
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const UInt absPartIdxCU); // CU's depth is taken from CU->getDepth(idx)
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TComTURecurse( TComTU &parentLevel, //Parent TU from which recursion children are derived
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const Bool bProcessLastOfLevel, //If true (and the split results in a "step-up" for chroma), the chroma TU is colocated with the last luma TU instead of the first
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const TU_SPLIT_MODE splitMode = QUAD_SPLIT, //DONT_SPLIT = create one new TU as a copy of its parent, VERTICAL_SPLIT = split the TU into top and bottom halves, QUAD_SPLIT = split the TU into four equal quadrants
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const Bool splitAtCurrentDepth = false, //Set true to keep the current depth when applying a vertical or quad split
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const ComponentID absPartIdxSourceComponent = COMPONENT_Y //Specifies which component of the parent TU should be used to initialise the absPartIdx of the first child and the absPartIdx step (this is needed when splitting a "stepped-up" chroma TU)
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)
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: TComTU(parentLevel, bProcessLastOfLevel, splitMode, splitAtCurrentDepth, absPartIdxSourceComponent) { }
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Bool nextSection(const TComTU &parent); // returns true if there is another section to process, and prepares internal structures, else returns false
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};
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//----------------------------------------------------------------------------------------------------------------------
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#endif
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