1 /* 2 * RealVideo 4 decoder 3 * copyright (c) 2007 Konstantin Shishkov 4 * 5 * This file is part of FFmpeg. 6 * 7 * FFmpeg is free software; you can redistribute it and/or 8 * modify it under the terms of the GNU Lesser General Public 9 * License as published by the Free Software Foundation; either 10 * version 2.1 of the License, or (at your option) any later version. 11 * 12 * FFmpeg is distributed in the hope that it will be useful, 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 15 * Lesser General Public License for more details. 16 * 17 * You should have received a copy of the GNU Lesser General Public 18 * License along with FFmpeg; if not, write to the Free Software 19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 20 */ 21 22 /** 23 * @file 24 * miscellaneous RV30/40 tables 25 */ 26 27 #ifndef AVCODEC_RV34DATA_H 28 #define AVCODEC_RV34DATA_H 29 30 #include <stdint.h> 31 32 /** 33 * number of ones in nibble minus one 34 */ 35 static const uint8_t rv34_count_ones[16] = { 36 0, 0, 0, 1, 0, 1, 1, 2, 0, 1, 1, 2, 1, 2, 2, 3 37 }; 38 39 /** 40 * values used to reconstruct coded block pattern 41 */ 42 static const uint8_t rv34_cbp_code[16] = { 43 0x00, 0x20, 0x10, 0x30, 0x02, 0x22, 0x12, 0x32, 44 0x01, 0x21, 0x11, 0x31, 0x03, 0x23, 0x13, 0x33 45 }; 46 47 /** 48 * precalculated results of division by three and modulo three for values 0-107 49 * 50 * A lot of four-tuples in RV40 are represented as c0*27+c1*9+c2*3+c3. 51 * This table allows conversion from a value back to a vector. 52 */ 53 static const uint8_t modulo_three_table[108] = { 54 0x00, 0x01, 0x02, 0x04, 0x05, 0x06, 0x08, 0x09, 0x0A, 55 0x10, 0x11, 0x12, 0x14, 0x15, 0x16, 0x18, 0x19, 0x1A, 56 0x20, 0x21, 0x22, 0x24, 0x25, 0x26, 0x28, 0x29, 0x2A, 57 58 0x40, 0x41, 0x42, 0x44, 0x45, 0x46, 0x48, 0x49, 0x4A, 59 0x50, 0x51, 0x52, 0x54, 0x55, 0x56, 0x58, 0x59, 0x5A, 60 0x60, 0x61, 0x62, 0x64, 0x65, 0x66, 0x68, 0x69, 0x6A, 61 62 0x80, 0x81, 0x82, 0x84, 0x85, 0x86, 0x88, 0x89, 0x8A, 63 0x90, 0x91, 0x92, 0x94, 0x95, 0x96, 0x98, 0x99, 0x9A, 64 0xA0, 0xA1, 0xA2, 0xA4, 0xA5, 0xA6, 0xA8, 0xA9, 0xAA, 65 66 0xC0, 0xC1, 0xC2, 0xC4, 0xC5, 0xC6, 0xC8, 0xC9, 0xCA, 67 0xD0, 0xD1, 0xD2, 0xD4, 0xD5, 0xD6, 0xD8, 0xD9, 0xDA, 68 0xE0, 0xE1, 0xE2, 0xE4, 0xE5, 0xE6, 0xE8, 0xE9, 0xEA, 69 }; 70 71 /** 72 * quantizer values used for AC and DC coefficients in chroma blocks 73 */ 74 static const uint8_t rv34_chroma_quant[2][32] = { 75 { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 76 16, 17, 17, 18, 19, 20, 20, 21, 22, 22, 23, 23, 24, 24, 25, 25 }, 77 { 0, 0, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 78 14, 15, 15, 16, 17, 18, 18, 19, 20, 20, 21, 21, 22, 22, 23, 23 } 79 }; 80 81 /** 82 * This table is used for dequantizing. 83 */ 84 static const uint16_t rv34_qscale_tab[32] = { 85 60, 67, 76, 85, 96, 108, 121, 136, 86 152, 171, 192, 216, 242, 272, 305, 341, 87 383, 432, 481, 544, 606, 683, 767, 854, 88 963, 1074, 1212, 1392, 1566, 1708, 1978, 2211 89 }; 90 91 /** 92 * tables used to translate a quantizer value into a VLC set for decoding 93 * The first table is used for intraframes. The two last entries are invalid. 94 */ 95 static const uint8_t rv34_quant_to_vlc_set[2][32] = { 96 { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 97 2, 2, 2, 2, 3, 3, 3, 3, 3, 4, 4, 4, 4, 4, 0, 0 }, 98 { 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 2, 2, 2, 2, 3, 99 3, 3, 3, 4, 4, 4, 4, 5, 5, 5, 5, 6, 6, 6, 6, 6 }, 100 }; 101 102 /** 103 * maximum number of macroblocks for each of the possible slice offset sizes 104 * @todo This is the same as ff_mba_max, maybe use it instead. 105 */ 106 static const uint16_t rv34_mb_max_sizes[6] = { 0x2F, 0x62, 0x18B, 0x62F, 0x18BF, 0x23FF }; 107 /** 108 * bits needed to code the slice offset for the given size 109 * @todo This is the same as ff_mba_length, maybe use it instead. 110 */ 111 static const uint8_t rv34_mb_bits_sizes[6] = { 6, 7, 9, 11, 13, 14 }; 112 113 #endif /* AVCODEC_RV34DATA_H */ 114