/* The copyright in this software is being made available under the BSD * License, included below. This software may be subject to other third party * and contributor rights, including patent rights, and no such rights are * granted under this license. * * Copyright (c) 2010-2013, ITU/ISO/IEC * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions are met: * * * Redistributions of source code must retain the above copyright notice, * this list of conditions and the following disclaimer. * * Redistributions in binary form must reproduce the above copyright notice, * this list of conditions and the following disclaimer in the documentation * and/or other materials provided with the distribution. * * Neither the name of the ITU/ISO/IEC nor the names of its contributors may * be used to endorse or promote products derived from this software without * specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF * THE POSSIBILITY OF SUCH DAMAGE. */ /** \file ContextTables.h \brief Defines constants and tables for SBAC \todo number of context models is not matched to actual use, should be fixed */ #ifndef X265_CONTEXTTABLES_H #define X265_CONTEXTTABLES_H #include "common.h" //! \ingroup TLibCommon //! \{ // ==================================================================================================================== // Constants // ==================================================================================================================== #define NUM_SPLIT_FLAG_CTX 3 ///< number of context models for split flag #define NUM_SKIP_FLAG_CTX 3 ///< number of context models for skip flag #define NUM_MERGE_FLAG_EXT_CTX 1 ///< number of context models for merge flag of merge extended #define NUM_MERGE_IDX_EXT_CTX 1 ///< number of context models for merge index of merge extended #define NUM_PART_SIZE_CTX 4 ///< number of context models for partition size #define NUM_PRED_MODE_CTX 1 ///< number of context models for prediction mode #define NUM_ADI_CTX 1 ///< number of context models for intra prediction #define NUM_CHROMA_PRED_CTX 2 ///< number of context models for intra prediction (chroma) #define NUM_INTER_DIR_CTX 5 ///< number of context models for inter prediction direction #define NUM_MV_RES_CTX 2 ///< number of context models for motion vector difference #define NUM_REF_NO_CTX 2 ///< number of context models for reference index #define NUM_TRANS_SUBDIV_FLAG_CTX 3 ///< number of context models for transform subdivision flags #define NUM_QT_CBF_CTX 6 ///< number of context models for QT CBF #define NUM_QT_ROOT_CBF_CTX 1 ///< number of context models for QT ROOT CBF #define NUM_DELTA_QP_CTX 3 ///< number of context models for dQP #define NUM_SIG_CG_FLAG_CTX 2 ///< number of context models for MULTI_LEVEL_SIGNIFICANCE #define NUM_SIG_FLAG_CTX 42 ///< number of context models for sig flag #define NUM_SIG_FLAG_CTX_LUMA 27 ///< number of context models for luma sig flag #define NUM_SIG_FLAG_CTX_CHROMA 15 ///< number of context models for chroma sig flag #define NUM_CTX_LAST_FLAG_XY 18 ///< number of context models for last coefficient position #define NUM_CTX_LAST_FLAG_XY_LUMA 15 ///< number of context models for last coefficient position of luma #define NUM_CTX_LAST_FLAG_XY_CHROMA 3 ///< number of context models for last coefficient position of chroma #define NUM_ONE_FLAG_CTX 24 ///< number of context models for greater than 1 flag #define NUM_ONE_FLAG_CTX_LUMA 16 ///< number of context models for greater than 1 flag of luma #define NUM_ONE_FLAG_CTX_CHROMA 8 ///< number of context models for greater than 1 flag of chroma #define NUM_ABS_FLAG_CTX 6 ///< number of context models for greater than 2 flag #define NUM_ABS_FLAG_CTX_LUMA 4 ///< number of context models for greater than 2 flag of luma #define NUM_ABS_FLAG_CTX_CHROMA 2 ///< number of context models for greater than 2 flag of chroma #define NUM_MVP_IDX_CTX 1 ///< number of context models for MVP index #define NUM_SAO_MERGE_FLAG_CTX 1 ///< number of context models for SAO merge flags #define NUM_SAO_TYPE_IDX_CTX 1 ///< number of context models for SAO type index #define NUM_TRANSFORMSKIP_FLAG_CTX 1 ///< number of context models for transform skipping #define NUM_CU_TRANSQUANT_BYPASS_FLAG_CTX 1 #define CNU 154 ///< dummy initialization value for unused context models 'Context model Not Used' // Offset for context #define OFF_SPLIT_FLAG_CTX (0) #define OFF_SKIP_FLAG_CTX (OFF_SPLIT_FLAG_CTX + NUM_SPLIT_FLAG_CTX) #define OFF_MERGE_FLAG_EXT_CTX (OFF_SKIP_FLAG_CTX + NUM_SKIP_FLAG_CTX) #define OFF_MERGE_IDX_EXT_CTX (OFF_MERGE_FLAG_EXT_CTX + NUM_MERGE_FLAG_EXT_CTX) #define OFF_PART_SIZE_CTX (OFF_MERGE_IDX_EXT_CTX + NUM_MERGE_IDX_EXT_CTX) #define OFF_PRED_MODE_CTX (OFF_PART_SIZE_CTX + NUM_PART_SIZE_CTX) #define OFF_ADI_CTX (OFF_PRED_MODE_CTX + NUM_PRED_MODE_CTX) #define OFF_CHROMA_PRED_CTX (OFF_ADI_CTX + NUM_ADI_CTX) #define OFF_DELTA_QP_CTX (OFF_CHROMA_PRED_CTX + NUM_CHROMA_PRED_CTX) #define OFF_INTER_DIR_CTX (OFF_DELTA_QP_CTX + NUM_DELTA_QP_CTX) #define OFF_REF_NO_CTX (OFF_INTER_DIR_CTX + NUM_INTER_DIR_CTX) #define OFF_MV_RES_CTX (OFF_REF_NO_CTX + NUM_REF_NO_CTX) #define OFF_QT_CBF_CTX (OFF_MV_RES_CTX + NUM_MV_RES_CTX) #define OFF_TRANS_SUBDIV_FLAG_CTX (OFF_QT_CBF_CTX + NUM_QT_CBF_CTX) #define OFF_QT_ROOT_CBF_CTX (OFF_TRANS_SUBDIV_FLAG_CTX + NUM_TRANS_SUBDIV_FLAG_CTX) #define OFF_SIG_CG_FLAG_CTX (OFF_QT_ROOT_CBF_CTX + NUM_QT_ROOT_CBF_CTX) #define OFF_SIG_FLAG_CTX (OFF_SIG_CG_FLAG_CTX + 2 * NUM_SIG_CG_FLAG_CTX) #define OFF_CTX_LAST_FLAG_X (OFF_SIG_FLAG_CTX + NUM_SIG_FLAG_CTX) #define OFF_CTX_LAST_FLAG_Y (OFF_CTX_LAST_FLAG_X + NUM_CTX_LAST_FLAG_XY) #define OFF_ONE_FLAG_CTX (OFF_CTX_LAST_FLAG_Y + NUM_CTX_LAST_FLAG_XY) #define OFF_ABS_FLAG_CTX (OFF_ONE_FLAG_CTX + NUM_ONE_FLAG_CTX) #define OFF_MVP_IDX_CTX (OFF_ABS_FLAG_CTX + NUM_ABS_FLAG_CTX) #define OFF_SAO_MERGE_FLAG_CTX (OFF_MVP_IDX_CTX + NUM_MVP_IDX_CTX) #define OFF_SAO_TYPE_IDX_CTX (OFF_SAO_MERGE_FLAG_CTX + NUM_SAO_MERGE_FLAG_CTX) #define OFF_TRANSFORMSKIP_FLAG_CTX (OFF_SAO_TYPE_IDX_CTX + NUM_SAO_TYPE_IDX_CTX) #define OFF_CU_TRANSQUANT_BYPASS_FLAG_CTX (OFF_TRANSFORMSKIP_FLAG_CTX + 2 * NUM_TRANSFORMSKIP_FLAG_CTX) #define MAX_OFF_CTX_MOD (OFF_CU_TRANSQUANT_BYPASS_FLAG_CTX + NUM_CU_TRANSQUANT_BYPASS_FLAG_CTX) namespace x265 { // private namespace extern const uint32_t g_entropyBits[128]; extern const uint8_t g_nextState[128][2]; #define sbacGetMps(S) ((S) & 1) #define sbacGetState(S) ((S) >> 1) #define sbacNext(S, V) (g_nextState[(S)][(V)]) #define sbacGetEntropyBits(S, V) (g_entropyBits[(S) ^ (V)]) #define sbacGetEntropyBitsTrm(V) (g_entropyBits[126 ^ (V)]) #define MAX_NUM_CHANNEL_TYPE 2 // ==================================================================================================================== // Tables // ==================================================================================================================== #define NEIGHBOURHOOD_00_CONTEXT_1_THRESHOLD_4x4 3 #define NEIGHBOURHOOD_00_CONTEXT_2_THRESHOLD_4x4 1 static const uint32_t significanceMapContextSetStart[MAX_NUM_CHANNEL_TYPE][3] = { { 0, 9, 21 }, { 0, 9, 12 } }; static const uint32_t significanceMapContextSetSize[MAX_NUM_CHANNEL_TYPE][3] = { { 9, 12, 6 }, { 9, 3, 3 } }; static const uint32_t nonDiagonalScan8x8ContextOffset[MAX_NUM_CHANNEL_TYPE] = { 6, 0 }; static const uint32_t notFirstGroupNeighbourhoodContextOffset[MAX_NUM_CHANNEL_TYPE] = { 3, 0 }; // initial probability for cu_transquant_bypass flag static const uint8_t INIT_CU_TRANSQUANT_BYPASS_FLAG[3][NUM_CU_TRANSQUANT_BYPASS_FLAG_CTX] = { { 154 }, { 154 }, { 154 }, }; // initial probability for split flag static const uint8_t INIT_SPLIT_FLAG[3][NUM_SPLIT_FLAG_CTX] = { { 107, 139, 126, }, { 107, 139, 126, }, { 139, 141, 157, }, }; static const uint8_t INIT_SKIP_FLAG[3][NUM_SKIP_FLAG_CTX] = { { 197, 185, 201, }, { 197, 185, 201, }, { CNU, CNU, CNU, }, }; static const uint8_t INIT_MERGE_FLAG_EXT[3][NUM_MERGE_FLAG_EXT_CTX] = { { 154, }, { 110, }, { CNU, }, }; static const uint8_t INIT_MERGE_IDX_EXT[3][NUM_MERGE_IDX_EXT_CTX] = { { 137, }, { 122, }, { CNU, }, }; static const uint8_t INIT_PART_SIZE[3][NUM_PART_SIZE_CTX] = { { 154, 139, 154, 154 }, { 154, 139, 154, 154 }, { 184, CNU, CNU, CNU }, }; static const uint8_t INIT_PRED_MODE[3][NUM_PRED_MODE_CTX] = { { 134, }, { 149, }, { CNU, }, }; static const uint8_t INIT_INTRA_PRED_MODE[3][NUM_ADI_CTX] = { { 183, }, { 154, }, { 184, }, }; static const uint8_t INIT_CHROMA_PRED_MODE[3][NUM_CHROMA_PRED_CTX] = { { 152, 139, }, { 152, 139, }, { 63, 139, }, }; static const uint8_t INIT_INTER_DIR[3][NUM_INTER_DIR_CTX] = { { 95, 79, 63, 31, 31, }, { 95, 79, 63, 31, 31, }, { CNU, CNU, CNU, CNU, CNU, }, }; static const uint8_t INIT_MVD[3][NUM_MV_RES_CTX] = { { 169, 198, }, { 140, 198, }, { CNU, CNU, }, }; static const uint8_t INIT_REF_PIC[3][NUM_REF_NO_CTX] = { { 153, 153 }, { 153, 153 }, { CNU, CNU }, }; static const uint8_t INIT_DQP[3][NUM_DELTA_QP_CTX] = { { 154, 154, 154, }, { 154, 154, 154, }, { 154, 154, 154, }, }; static const uint8_t INIT_QT_CBF[3][NUM_QT_CBF_CTX] = { { 153, 111, 149, 92, 167, 154, }, { 153, 111, 149, 107, 167, 154, }, { 111, 141, 94, 138, 182, 154, }, }; static const uint8_t INIT_QT_ROOT_CBF[3][NUM_QT_ROOT_CBF_CTX] = { { 79, }, { 79, }, { CNU, }, }; static const uint8_t INIT_LAST[3][NUM_CTX_LAST_FLAG_XY] = { { 125, 110, 124, 110, 95, 94, 125, 111, 111, 79, 125, 126, 111, 111, 79, 108, 123, 93 }, { 125, 110, 94, 110, 95, 79, 125, 111, 110, 78, 110, 111, 111, 95, 94, 108, 123, 108 }, { 110, 110, 124, 125, 140, 153, 125, 127, 140, 109, 111, 143, 127, 111, 79, 108, 123, 63 }, }; static const uint8_t INIT_SIG_CG_FLAG[3][2 * NUM_SIG_CG_FLAG_CTX] = { { 121, 140, 61, 154, }, { 121, 140, 61, 154, }, { 91, 171, 134, 141, }, }; static const uint8_t INIT_SIG_FLAG[3][NUM_SIG_FLAG_CTX] = { { 170, 154, 139, 153, 139, 123, 123, 63, 124, 166, 183, 140, 136, 153, 154, 166, 183, 140, 136, 153, 154, 166, 183, 140, 136, 153, 154, 170, 153, 138, 138, 122, 121, 122, 121, 167, 151, 183, 140, 151, 183, 140, }, { 155, 154, 139, 153, 139, 123, 123, 63, 153, 166, 183, 140, 136, 153, 154, 166, 183, 140, 136, 153, 154, 166, 183, 140, 136, 153, 154, 170, 153, 123, 123, 107, 121, 107, 121, 167, 151, 183, 140, 151, 183, 140, }, { 111, 111, 125, 110, 110, 94, 124, 108, 124, 107, 125, 141, 179, 153, 125, 107, 125, 141, 179, 153, 125, 107, 125, 141, 179, 153, 125, 140, 139, 182, 182, 152, 136, 152, 136, 153, 136, 139, 111, 136, 139, 111, }, }; static const uint8_t INIT_ONE_FLAG[3][NUM_ONE_FLAG_CTX] = { { 154, 196, 167, 167, 154, 152, 167, 182, 182, 134, 149, 136, 153, 121, 136, 122, 169, 208, 166, 167, 154, 152, 167, 182, }, { 154, 196, 196, 167, 154, 152, 167, 182, 182, 134, 149, 136, 153, 121, 136, 137, 169, 194, 166, 167, 154, 167, 137, 182, }, { 140, 92, 137, 138, 140, 152, 138, 139, 153, 74, 149, 92, 139, 107, 122, 152, 140, 179, 166, 182, 140, 227, 122, 197, }, }; static const uint8_t INIT_ABS_FLAG[3][NUM_ABS_FLAG_CTX] = { { 107, 167, 91, 107, 107, 167, }, { 107, 167, 91, 122, 107, 167, }, { 138, 153, 136, 167, 152, 152, }, }; static const uint8_t INIT_MVP_IDX[3][NUM_MVP_IDX_CTX] = { { 168 }, { 168 }, { CNU }, }; static const uint8_t INIT_SAO_MERGE_FLAG[3][NUM_SAO_MERGE_FLAG_CTX] = { { 153, }, { 153, }, { 153, }, }; static const uint8_t INIT_SAO_TYPE_IDX[3][NUM_SAO_TYPE_IDX_CTX] = { { 160, }, { 185, }, { 200, }, }; static const uint8_t INIT_TRANS_SUBDIV_FLAG[3][NUM_TRANS_SUBDIV_FLAG_CTX] = { { 224, 167, 122, }, { 124, 138, 94, }, { 153, 138, 138, }, }; static const uint8_t INIT_TRANSFORMSKIP_FLAG[3][2 * NUM_TRANSFORMSKIP_FLAG_CTX] = { { 139, 139 }, { 139, 139 }, { 139, 139 }, }; } //! \} #endif // ifndef X265_CONTEXTTABLES_H