/*****************************************************************************
* Copyright (C) 2013-2017 MulticoreWare, Inc
*
* Authors: Steve Borho <steve@borho.org>
* Min Chen <chenm003@163.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02111, USA.
*
* This program is also available under a commercial proprietary license.
* For more information, contact us at license @ x265.com.
*****************************************************************************/
#ifndef X265_CONTEXTS_H
#define X265_CONTEXTS_H
#include "common.h"
#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 7 // 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_TQUANT_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_TQUANT_BYPASS_FLAG_CTX (OFF_TRANSFORMSKIP_FLAG_CTX + 2 * NUM_TRANSFORMSKIP_FLAG_CTX)
#define MAX_OFF_CTX_MOD (OFF_TQUANT_BYPASS_FLAG_CTX + NUM_TQUANT_BYPASS_FLAG_CTX)
extern "C" const uint32_t PFX(entropyStateBits)[128];
namespace X265_NS {
// 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)])
static const uint32_t ctxCbf[3][5] = { { 1, 0, 0, 0, 0 }, { 2, 3, 4, 5, 6 }, { 2, 3, 4, 5, 6 } };
}
#endif // ifndef X265_CONTEXTS_H