forked from mirror/libbpg
142 lines
5.7 KiB
C++
142 lines
5.7 KiB
C++
/* 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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#include "TComChromaFormat.h"
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#include "TComPic.h"
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#include "TComDataCU.h"
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#include "TComTrQuant.h"
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#include "TComTU.h"
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//----------------------------------------------------------------------------------------------------------------------
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InputColourSpaceConversion stringToInputColourSpaceConvert(const std::string &value, const Bool bIsForward)
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{
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if (value.empty() || value=="UNCHANGED") return IPCOLOURSPACE_UNCHANGED;
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if (bIsForward)
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{
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if (value=="YCbCrtoYYY") return IPCOLOURSPACE_YCbCrtoYYY;
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if (value=="YCbCrtoYCrCb") return IPCOLOURSPACE_YCbCrtoYCrCb;
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if (value=="RGBtoGBR") return IPCOLOURSPACE_RGBtoGBR;
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}
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else
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{
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if (value=="YCrCbtoYCbCr") return IPCOLOURSPACE_YCbCrtoYCrCb;
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if (value=="GBRtoRGB") return IPCOLOURSPACE_RGBtoGBR;
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}
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return NUMBER_INPUT_COLOUR_SPACE_CONVERSIONS;
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}
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std::string getListOfColourSpaceConverts(const Bool bIsForward)
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{
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if (bIsForward)
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{
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return "UNCHANGED, YCbCrtoYCrCb, YCbCrtoYYY or RGBtoGBR";
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}
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else
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{
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return "UNCHANGED, YCrCbtoYCbCr or GBRtoRGB";
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}
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}
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//----------------------------------------------------------------------------------------------------------------------
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Void getTUEntropyCodingParameters( TUEntropyCodingParameters &result,
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TComTU &rTu,
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const ComponentID component)
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{
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//------------------------------------------------
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//set the local parameters
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TComDataCU *const pcCU = rTu.getCU();
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const TComRectangle & area = rTu.getRect(component);
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const UInt uiAbsPartIdx = rTu.GetAbsPartIdxTU(component);
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const UInt log2BlockWidth = g_aucConvertToBit[area.width] + 2;
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const UInt log2BlockHeight = g_aucConvertToBit[area.height] + 2;
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const ChannelType channelType = toChannelType(component);
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result.scanType = COEFF_SCAN_TYPE(pcCU->getCoefScanIdx(uiAbsPartIdx, area.width, area.height, component));
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//------------------------------------------------
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//set the group layout
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result.widthInGroups = area.width >> MLS_CG_LOG2_WIDTH;
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result.heightInGroups = area.height >> MLS_CG_LOG2_HEIGHT;
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//------------------------------------------------
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//set the scan orders
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const UInt log2WidthInGroups = g_aucConvertToBit[result.widthInGroups * 4];
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const UInt log2HeightInGroups = g_aucConvertToBit[result.heightInGroups * 4];
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result.scan = g_scanOrder[ SCAN_GROUPED_4x4 ][ result.scanType ][ log2BlockWidth ][ log2BlockHeight ];
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result.scanCG = g_scanOrder[ SCAN_UNGROUPED ][ result.scanType ][ log2WidthInGroups ][ log2HeightInGroups ];
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//------------------------------------------------
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//set the significance map context selection parameters
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if (pcCU->getSlice()->getSPS()->getUseSingleSignificanceMapContext()
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&& (pcCU->getCUTransquantBypass(uiAbsPartIdx) || (pcCU->getTransformSkip(uiAbsPartIdx, component) != 0)))
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{
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result.firstSignificanceMapContext = significanceMapContextSetStart[channelType][CONTEXT_TYPE_SINGLE];
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}
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else
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{
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if ((area.width == 4) && (area.height == 4))
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{
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result.firstSignificanceMapContext = significanceMapContextSetStart[channelType][CONTEXT_TYPE_4x4];
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}
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else if ((area.width == 8) && (area.height == 8))
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{
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result.firstSignificanceMapContext = significanceMapContextSetStart[channelType][CONTEXT_TYPE_8x8];
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if (result.scanType != SCAN_DIAG) result.firstSignificanceMapContext += nonDiagonalScan8x8ContextOffset[channelType];
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}
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else
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{
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result.firstSignificanceMapContext = significanceMapContextSetStart[channelType][CONTEXT_TYPE_NxN];
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}
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}
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//------------------------------------------------
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}
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//----------------------------------------------------------------------------------------------------------------------
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