forked from mirror/libbpg
311 lines
12 KiB
C++
311 lines
12 KiB
C++
/*****************************************************************************
|
|
* Copyright (C) 2015 x265 project
|
|
*
|
|
* Authors: Steve Borho <steve@borho.org>
|
|
*
|
|
* 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)])
|
|
|
|
#define MAX_NUM_CHANNEL_TYPE 2
|
|
|
|
static const uint32_t ctxCbf[3][5] = { { 1, 0, 0, 0, 0 }, { 2, 3, 4, 5, 6 }, { 2, 3, 4, 5, 6 } };
|
|
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_TQUANT_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, 154 },
|
|
{ 153, 111, 149, 107, 167, 154, 154 },
|
|
{ 111, 141, 94, 138, 182, 154, 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_CONTEXTS_H
|