forked from mirror/libbpg
312 lines
12 KiB
C
312 lines
12 KiB
C
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/*****************************************************************************
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* Copyright (C) 2015 x265 project
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*
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* Authors: Steve Borho <steve@borho.org>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02111, USA.
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*
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* This program is also available under a commercial proprietary license.
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* For more information, contact us at license @ x265.com.
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*****************************************************************************/
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#ifndef X265_CONTEXTS_H
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#define X265_CONTEXTS_H
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#include "common.h"
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#define NUM_SPLIT_FLAG_CTX 3 // number of context models for split flag
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#define NUM_SKIP_FLAG_CTX 3 // number of context models for skip flag
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#define NUM_MERGE_FLAG_EXT_CTX 1 // number of context models for merge flag of merge extended
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#define NUM_MERGE_IDX_EXT_CTX 1 // number of context models for merge index of merge extended
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#define NUM_PART_SIZE_CTX 4 // number of context models for partition size
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#define NUM_PRED_MODE_CTX 1 // number of context models for prediction mode
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#define NUM_ADI_CTX 1 // number of context models for intra prediction
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#define NUM_CHROMA_PRED_CTX 2 // number of context models for intra prediction (chroma)
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#define NUM_INTER_DIR_CTX 5 // number of context models for inter prediction direction
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#define NUM_MV_RES_CTX 2 // number of context models for motion vector difference
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#define NUM_REF_NO_CTX 2 // number of context models for reference index
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#define NUM_TRANS_SUBDIV_FLAG_CTX 3 // number of context models for transform subdivision flags
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#define NUM_QT_CBF_CTX 7 // number of context models for QT CBF
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#define NUM_QT_ROOT_CBF_CTX 1 // number of context models for QT ROOT CBF
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#define NUM_DELTA_QP_CTX 3 // number of context models for dQP
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#define NUM_SIG_CG_FLAG_CTX 2 // number of context models for MULTI_LEVEL_SIGNIFICANCE
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#define NUM_SIG_FLAG_CTX 42 // number of context models for sig flag
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#define NUM_SIG_FLAG_CTX_LUMA 27 // number of context models for luma sig flag
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#define NUM_SIG_FLAG_CTX_CHROMA 15 // number of context models for chroma sig flag
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#define NUM_CTX_LAST_FLAG_XY 18 // number of context models for last coefficient position
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#define NUM_CTX_LAST_FLAG_XY_LUMA 15 // number of context models for last coefficient position of luma
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#define NUM_CTX_LAST_FLAG_XY_CHROMA 3 // number of context models for last coefficient position of chroma
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#define NUM_ONE_FLAG_CTX 24 // number of context models for greater than 1 flag
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#define NUM_ONE_FLAG_CTX_LUMA 16 // number of context models for greater than 1 flag of luma
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#define NUM_ONE_FLAG_CTX_CHROMA 8 // number of context models for greater than 1 flag of chroma
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#define NUM_ABS_FLAG_CTX 6 // number of context models for greater than 2 flag
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#define NUM_ABS_FLAG_CTX_LUMA 4 // number of context models for greater than 2 flag of luma
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#define NUM_ABS_FLAG_CTX_CHROMA 2 // number of context models for greater than 2 flag of chroma
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#define NUM_MVP_IDX_CTX 1 // number of context models for MVP index
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#define NUM_SAO_MERGE_FLAG_CTX 1 // number of context models for SAO merge flags
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#define NUM_SAO_TYPE_IDX_CTX 1 // number of context models for SAO type index
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#define NUM_TRANSFORMSKIP_FLAG_CTX 1 // number of context models for transform skipping
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#define NUM_TQUANT_BYPASS_FLAG_CTX 1
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#define CNU 154 // dummy initialization value for unused context models 'Context model Not Used'
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// Offset for context
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#define OFF_SPLIT_FLAG_CTX (0)
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#define OFF_SKIP_FLAG_CTX (OFF_SPLIT_FLAG_CTX + NUM_SPLIT_FLAG_CTX)
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#define OFF_MERGE_FLAG_EXT_CTX (OFF_SKIP_FLAG_CTX + NUM_SKIP_FLAG_CTX)
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#define OFF_MERGE_IDX_EXT_CTX (OFF_MERGE_FLAG_EXT_CTX + NUM_MERGE_FLAG_EXT_CTX)
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#define OFF_PART_SIZE_CTX (OFF_MERGE_IDX_EXT_CTX + NUM_MERGE_IDX_EXT_CTX)
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#define OFF_PRED_MODE_CTX (OFF_PART_SIZE_CTX + NUM_PART_SIZE_CTX)
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#define OFF_ADI_CTX (OFF_PRED_MODE_CTX + NUM_PRED_MODE_CTX)
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#define OFF_CHROMA_PRED_CTX (OFF_ADI_CTX + NUM_ADI_CTX)
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#define OFF_DELTA_QP_CTX (OFF_CHROMA_PRED_CTX + NUM_CHROMA_PRED_CTX)
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#define OFF_INTER_DIR_CTX (OFF_DELTA_QP_CTX + NUM_DELTA_QP_CTX)
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#define OFF_REF_NO_CTX (OFF_INTER_DIR_CTX + NUM_INTER_DIR_CTX)
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#define OFF_MV_RES_CTX (OFF_REF_NO_CTX + NUM_REF_NO_CTX)
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#define OFF_QT_CBF_CTX (OFF_MV_RES_CTX + NUM_MV_RES_CTX)
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#define OFF_TRANS_SUBDIV_FLAG_CTX (OFF_QT_CBF_CTX + NUM_QT_CBF_CTX)
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#define OFF_QT_ROOT_CBF_CTX (OFF_TRANS_SUBDIV_FLAG_CTX + NUM_TRANS_SUBDIV_FLAG_CTX)
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#define OFF_SIG_CG_FLAG_CTX (OFF_QT_ROOT_CBF_CTX + NUM_QT_ROOT_CBF_CTX)
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#define OFF_SIG_FLAG_CTX (OFF_SIG_CG_FLAG_CTX + 2 * NUM_SIG_CG_FLAG_CTX)
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#define OFF_CTX_LAST_FLAG_X (OFF_SIG_FLAG_CTX + NUM_SIG_FLAG_CTX)
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#define OFF_CTX_LAST_FLAG_Y (OFF_CTX_LAST_FLAG_X + NUM_CTX_LAST_FLAG_XY)
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#define OFF_ONE_FLAG_CTX (OFF_CTX_LAST_FLAG_Y + NUM_CTX_LAST_FLAG_XY)
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#define OFF_ABS_FLAG_CTX (OFF_ONE_FLAG_CTX + NUM_ONE_FLAG_CTX)
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#define OFF_MVP_IDX_CTX (OFF_ABS_FLAG_CTX + NUM_ABS_FLAG_CTX)
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#define OFF_SAO_MERGE_FLAG_CTX (OFF_MVP_IDX_CTX + NUM_MVP_IDX_CTX)
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#define OFF_SAO_TYPE_IDX_CTX (OFF_SAO_MERGE_FLAG_CTX + NUM_SAO_MERGE_FLAG_CTX)
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#define OFF_TRANSFORMSKIP_FLAG_CTX (OFF_SAO_TYPE_IDX_CTX + NUM_SAO_TYPE_IDX_CTX)
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#define OFF_TQUANT_BYPASS_FLAG_CTX (OFF_TRANSFORMSKIP_FLAG_CTX + 2 * NUM_TRANSFORMSKIP_FLAG_CTX)
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#define MAX_OFF_CTX_MOD (OFF_TQUANT_BYPASS_FLAG_CTX + NUM_TQUANT_BYPASS_FLAG_CTX)
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extern "C" const uint32_t PFX(entropyStateBits)[128];
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namespace X265_NS {
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// private namespace
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extern const uint32_t g_entropyBits[128];
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extern const uint8_t g_nextState[128][2];
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#define sbacGetMps(S) ((S) & 1)
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#define sbacGetState(S) ((S) >> 1)
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#define sbacNext(S, V) (g_nextState[(S)][(V)])
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#define sbacGetEntropyBits(S, V) (g_entropyBits[(S) ^ (V)])
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#define sbacGetEntropyBitsTrm(V) (g_entropyBits[126 ^ (V)])
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#define MAX_NUM_CHANNEL_TYPE 2
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static const uint32_t ctxCbf[3][5] = { { 1, 0, 0, 0, 0 }, { 2, 3, 4, 5, 6 }, { 2, 3, 4, 5, 6 } };
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static const uint32_t significanceMapContextSetStart[MAX_NUM_CHANNEL_TYPE][3] = { { 0, 9, 21 }, { 0, 9, 12 } };
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static const uint32_t significanceMapContextSetSize[MAX_NUM_CHANNEL_TYPE][3] = { { 9, 12, 6 }, { 9, 3, 3 } };
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static const uint32_t nonDiagonalScan8x8ContextOffset[MAX_NUM_CHANNEL_TYPE] = { 6, 0 };
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static const uint32_t notFirstGroupNeighbourhoodContextOffset[MAX_NUM_CHANNEL_TYPE] = { 3, 0 };
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// initial probability for cu_transquant_bypass flag
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static const uint8_t INIT_CU_TRANSQUANT_BYPASS_FLAG[3][NUM_TQUANT_BYPASS_FLAG_CTX] =
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{
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{ 154 },
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{ 154 },
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{ 154 },
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};
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// initial probability for split flag
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static const uint8_t INIT_SPLIT_FLAG[3][NUM_SPLIT_FLAG_CTX] =
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{
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{ 107, 139, 126, },
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{ 107, 139, 126, },
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{ 139, 141, 157, },
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};
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static const uint8_t INIT_SKIP_FLAG[3][NUM_SKIP_FLAG_CTX] =
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{
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{ 197, 185, 201, },
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{ 197, 185, 201, },
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{ CNU, CNU, CNU, },
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};
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static const uint8_t INIT_MERGE_FLAG_EXT[3][NUM_MERGE_FLAG_EXT_CTX] =
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{
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{ 154, },
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{ 110, },
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{ CNU, },
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};
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static const uint8_t INIT_MERGE_IDX_EXT[3][NUM_MERGE_IDX_EXT_CTX] =
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{
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{ 137, },
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{ 122, },
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{ CNU, },
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};
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static const uint8_t INIT_PART_SIZE[3][NUM_PART_SIZE_CTX] =
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{
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{ 154, 139, 154, 154 },
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{ 154, 139, 154, 154 },
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{ 184, CNU, CNU, CNU },
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};
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static const uint8_t INIT_PRED_MODE[3][NUM_PRED_MODE_CTX] =
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{
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{ 134, },
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{ 149, },
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{ CNU, },
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};
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static const uint8_t INIT_INTRA_PRED_MODE[3][NUM_ADI_CTX] =
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{
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{ 183, },
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{ 154, },
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{ 184, },
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};
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static const uint8_t INIT_CHROMA_PRED_MODE[3][NUM_CHROMA_PRED_CTX] =
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{
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{ 152, 139, },
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{ 152, 139, },
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{ 63, 139, },
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};
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static const uint8_t INIT_INTER_DIR[3][NUM_INTER_DIR_CTX] =
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{
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{ 95, 79, 63, 31, 31, },
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{ 95, 79, 63, 31, 31, },
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{ CNU, CNU, CNU, CNU, CNU, },
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};
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static const uint8_t INIT_MVD[3][NUM_MV_RES_CTX] =
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{
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{ 169, 198, },
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{ 140, 198, },
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{ CNU, CNU, },
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};
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static const uint8_t INIT_REF_PIC[3][NUM_REF_NO_CTX] =
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{
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{ 153, 153 },
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{ 153, 153 },
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{ CNU, CNU },
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};
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static const uint8_t INIT_DQP[3][NUM_DELTA_QP_CTX] =
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{
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{ 154, 154, 154, },
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{ 154, 154, 154, },
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{ 154, 154, 154, },
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};
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static const uint8_t INIT_QT_CBF[3][NUM_QT_CBF_CTX] =
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{
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{ 153, 111, 149, 92, 167, 154, 154 },
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{ 153, 111, 149, 107, 167, 154, 154 },
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{ 111, 141, 94, 138, 182, 154, 154 },
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};
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static const uint8_t INIT_QT_ROOT_CBF[3][NUM_QT_ROOT_CBF_CTX] =
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{
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{ 79, },
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{ 79, },
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{ CNU, },
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};
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static const uint8_t INIT_LAST[3][NUM_CTX_LAST_FLAG_XY] =
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{
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{ 125, 110, 124, 110, 95, 94, 125, 111, 111, 79, 125, 126, 111, 111, 79,
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108, 123, 93 },
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{ 125, 110, 94, 110, 95, 79, 125, 111, 110, 78, 110, 111, 111, 95, 94,
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108, 123, 108 },
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{ 110, 110, 124, 125, 140, 153, 125, 127, 140, 109, 111, 143, 127, 111, 79,
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108, 123, 63 },
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};
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static const uint8_t INIT_SIG_CG_FLAG[3][2 * NUM_SIG_CG_FLAG_CTX] =
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{
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{ 121, 140,
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61, 154, },
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{ 121, 140,
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61, 154, },
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{ 91, 171,
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134, 141, },
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};
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static const uint8_t INIT_SIG_FLAG[3][NUM_SIG_FLAG_CTX] =
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{
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{ 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, },
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{ 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, },
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{ 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, },
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};
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static const uint8_t INIT_ONE_FLAG[3][NUM_ONE_FLAG_CTX] =
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{
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{ 154, 196, 167, 167, 154, 152, 167, 182, 182, 134, 149, 136, 153, 121, 136, 122, 169, 208, 166, 167, 154, 152, 167, 182, },
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{ 154, 196, 196, 167, 154, 152, 167, 182, 182, 134, 149, 136, 153, 121, 136, 137, 169, 194, 166, 167, 154, 167, 137, 182, },
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{ 140, 92, 137, 138, 140, 152, 138, 139, 153, 74, 149, 92, 139, 107, 122, 152, 140, 179, 166, 182, 140, 227, 122, 197, },
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};
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static const uint8_t INIT_ABS_FLAG[3][NUM_ABS_FLAG_CTX] =
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{
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{ 107, 167, 91, 107, 107, 167, },
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{ 107, 167, 91, 122, 107, 167, },
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{ 138, 153, 136, 167, 152, 152, },
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};
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static const uint8_t INIT_MVP_IDX[3][NUM_MVP_IDX_CTX] =
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{
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{ 168 },
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{ 168 },
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{ CNU },
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};
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static const uint8_t INIT_SAO_MERGE_FLAG[3][NUM_SAO_MERGE_FLAG_CTX] =
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{
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{ 153, },
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{ 153, },
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{ 153, },
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};
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static const uint8_t INIT_SAO_TYPE_IDX[3][NUM_SAO_TYPE_IDX_CTX] =
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{
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{ 160, },
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{ 185, },
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{ 200, },
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};
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static const uint8_t INIT_TRANS_SUBDIV_FLAG[3][NUM_TRANS_SUBDIV_FLAG_CTX] =
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{
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{ 224, 167, 122, },
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{ 124, 138, 94, },
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{ 153, 138, 138, },
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};
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static const uint8_t INIT_TRANSFORMSKIP_FLAG[3][2 * NUM_TRANSFORMSKIP_FLAG_CTX] =
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{
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{ 139, 139 },
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{ 139, 139 },
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{ 139, 139 },
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};
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||
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}
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||
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|
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||
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#endif // ifndef X265_CONTEXTS_H
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