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97 lines
3 KiB
C
97 lines
3 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) 2013-2015 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 it under
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* the terms of the GNU Lesser General Public License as published by the
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* Free Software Foundation; either version 2.1 of the License, or (at your
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* option) any later version.
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*
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* Kvazaar is distributed in the hope that it will be useful, but WITHOUT ANY
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* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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* FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with Kvazaar. If not, see <http://www.gnu.org/licenses/>.
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****************************************************************************/
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/**
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* \ingroup Reconstruction
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* \file
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* Various tables.
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*/
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#include "global.h" // IWYU pragma: keep
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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 kvz_g_sig_last_scan[3][5];
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extern const int8_t kvz_g_convert_to_bit[LCU_WIDTH + 1];
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#endif //TABLES_H_
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