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104 lines
3.2 KiB
C
104 lines
3.2 KiB
C
#ifndef TABLES_H_
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#define TABLES_H_
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/*****************************************************************************
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* This file is part of Kvazaar HEVC encoder.
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*
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* Copyright (C) 2013-2014 Tampere University of Technology and others (see
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* COPYING file).
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*
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* Kvazaar is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as published
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* by the Free Software Foundation.
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*
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* Kvazaar 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 Kvazaar. If not, see <http://www.gnu.org/licenses/>.
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****************************************************************************/
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#include "global.h"
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//4 8 16 32 64 128
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//0 1 2 3 4 5
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static const uint8_t g_to_bits[129] =
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{
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0,
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0,0,0,0,
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0,0,0,1,
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0,0,0,0,0,0,0,2,
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0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,3,
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0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,4,
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0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
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0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,5
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};
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#define TOBITS(len) g_to_bits[len]
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/***
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* List of indices for 4x4 coefficient groups within 8x8 transform block.
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* First index: 0 = diagonal, 1 = vertical, 2 horizontal scan pattern.
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* Second index: (log2 - 2) size of transform block. 4x4 .. 32x32
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*/
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static const uint32_t g_sig_last_scan_8x8[3][4] =
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{ {0, 2, 1, 3},
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{0, 1, 2, 3},
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{0, 2, 1, 3}
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};
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/***
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* List of indices for 4x4 coefficient groups within 16x16 transform block.
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*/
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static const uint32_t g_sig_last_scan_16x16[16] = {
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0, 4, 1, 8,
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5, 2, 12, 9,
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6, 3, 13, 10,
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7, 14, 11, 15
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};
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/***
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* List of indices for 4x4 coefficient groups within 32x32 transform block.
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*/
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static const uint32_t g_sig_last_scan_32x32[64] = {
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0, 8, 1, 16, 9, 2, 24, 17,
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10, 3, 32, 25, 18, 11, 4, 40,
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33, 26, 19, 12, 5, 48, 41, 34,
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27, 20, 13, 6, 56, 49, 42, 35,
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28, 21, 14, 7, 57, 50, 43, 36,
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29, 22, 15, 58, 51, 44, 37, 30,
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23, 59, 52, 45, 38, 31, 60, 53,
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46, 39, 61, 54, 47, 62, 55, 63
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};
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/**
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* List of pointers to coefficient group mappings.
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* First index: (log2 - 2) of transform block size
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* Second index: scan pattern 0 = diagonal, 1 = horizontal, 2 = vertical
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*/
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static const uint32_t * const g_sig_last_scan_cg[4][3] = {
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{ g_sig_last_scan_8x8[0], g_sig_last_scan_8x8[1], g_sig_last_scan_8x8[2] }, // 4x4, only first element is used
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{ g_sig_last_scan_8x8[0], g_sig_last_scan_8x8[1], g_sig_last_scan_8x8[2] },
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{ g_sig_last_scan_16x16, 0, 0 },
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{ g_sig_last_scan_32x32, 0, 0 }
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};
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typedef enum
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{
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SCAN_DIAG = 0, // up-right diagonal scan
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SCAN_HOR, // horizontal first scan
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SCAN_VER // vertical first scan
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} coeff_scan_order_t;
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/**
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* List of mappings for coefficients within a transform block.
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* First index: scan pattern 0 = diagonal, 1 = horizontal, 2 = vertical
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* Second index: (log2 - 1) size of transform block. 2x2 .. 32x32
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*/
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extern const uint32_t* const g_sig_last_scan[3][5];
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extern const int8_t g_convert_to_bit[LCU_WIDTH + 1];
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#endif //TABLES_H_
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