source/common/constants.h

   1 /*****************************************************************************
   2  * Copyright (C) 2014 x265 project
   3  *
   4  * Authors: Steve Borho <steve@borho.org>
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02111, USA.
  19  *
  20  * This program is also available under a commercial proprietary license.
  21  * For more information, contact us at license @ x265.com.
  22  *****************************************************************************/
  23
  24 #ifndef X265_CONSTANTS_H
  25 #define X265_CONSTANTS_H
  26
  27 #include "common.h"
  28
  29 namespace x265 {
  30 // private namespace
  31
  32 void initROM();
  33 void destroyROM();
  34
  35 void initZscanToRaster(uint32_t maxFullDepth, uint32_t depth, uint32_t startVal, uint32_t*& curIdx);
  36 void initRasterToZscan(uint32_t maxFullDepth);
  37
  38 extern double x265_lambda_tab[QP_MAX_MAX + 1];
  39 extern double x265_lambda2_tab[QP_MAX_MAX + 1];
  40 extern const uint16_t x265_chroma_lambda2_offset_tab[MAX_CHROMA_LAMBDA_OFFSET + 1];
  41
  42 enum { ChromaQPMappingTableSize = 70 };
  43 enum { AngleMapping422TableSize = 36 };
  44
  45 extern const uint8_t g_chromaScale[ChromaQPMappingTableSize];
  46 extern const uint8_t g_chroma422IntraAngleMappingTable[AngleMapping422TableSize];
  47
  48 // flexible conversion from relative to absolute index
  49 extern uint32_t g_zscanToRaster[MAX_NUM_PARTITIONS];
  50 extern uint32_t g_rasterToZscan[MAX_NUM_PARTITIONS];
  51
  52 // conversion of partition index to picture pel position
  53 extern const uint8_t g_zscanToPelX[MAX_NUM_PARTITIONS];
  54 extern const uint8_t g_zscanToPelY[MAX_NUM_PARTITIONS];
  55 extern const uint8_t g_log2Size[MAX_CU_SIZE + 1]; // from size to log2(size)
  56
  57 // global variable (CTU width/height, max. CU depth)
  58 extern uint32_t g_maxLog2CUSize;
  59 extern uint32_t g_maxCUSize;
  60 extern uint32_t g_maxCUDepth;
  61 extern uint32_t g_maxFullDepth;
  62
  63 extern const int16_t g_t4[4][4];
  64 extern const int16_t g_t8[8][8];
  65 extern const int16_t g_t16[16][16];
  66 extern const int16_t g_t32[32][32];
  67
  68 // Subpel interpolation defines and constants
  69
  70 #define NTAPS_LUMA        8                            // Number of taps for luma
  71 #define NTAPS_CHROMA      4                            // Number of taps for chroma
  72 #define IF_INTERNAL_PREC 14                            // Number of bits for internal precision
  73 #define IF_FILTER_PREC    6                            // Log2 of sum of filter taps
  74 #define IF_INTERNAL_OFFS (1 << (IF_INTERNAL_PREC - 1)) // Offset used internally
  75 #define SLFASE_CONSTANT  0x5f4e4a53
  76
  77 extern const int16_t g_lumaFilter[4][NTAPS_LUMA];      // Luma filter taps
  78 extern const int16_t g_chromaFilter[8][NTAPS_CHROMA];  // Chroma filter taps
  79
  80 // Scanning order & context mapping table
  81
  82 #define NUM_SCAN_SIZE 4
  83
  84 extern const uint16_t* const g_scanOrder[NUM_SCAN_TYPE][NUM_SCAN_SIZE];
  85 extern const uint16_t* const g_scanOrderCG[NUM_SCAN_TYPE][NUM_SCAN_SIZE];
  86 extern const uint16_t g_scan8x8diag[8 * 8];
  87 extern const uint16_t g_scan4x4[NUM_SCAN_TYPE][4 * 4];
  88
  89 extern const uint8_t g_minInGroup[10];
  90 extern const uint8_t g_goRiceRange[5]; // maximum value coded with Rice codes
  91
  92 // CABAC tables
  93 extern const uint8_t g_lpsTable[64][4];
  94 extern const uint8_t x265_exp2_lut[64];
  95
  96 // Intra tables
  97 extern const uint8_t g_intraFilterFlags[NUM_INTRA_MODE];
  98
  99 extern const uint32_t g_depthInc[3][4];
 100 extern const uint32_t g_depthScanIdx[8][8];
 101
 102 }
 103
 104 #endif