mp3tabs.cpp
1 /* ***** BEGIN LICENSE BLOCK ***** 2 * Version: RCSL 1.0/RPSL 1.0 3 * 4 * Portions Copyright (c) 1995-2002 RealNetworks, Inc. All Rights Reserved. 5 * 6 * The contents of this file, and the files included with this file, are 7 * subject to the current version of the RealNetworks Public Source License 8 * Version 1.0 (the "RPSL") available at 9 * http://www.helixcommunity.org/content/rpsl unless you have licensed 10 * the file under the RealNetworks Community Source License Version 1.0 11 * (the "RCSL") available at http://www.helixcommunity.org/content/rcsl, 12 * in which case the RCSL will apply. You may also obtain the license terms 13 * directly from RealNetworks. You may not use this file except in 14 * compliance with the RPSL or, if you have a valid RCSL with RealNetworks 15 * applicable to this file, the RCSL. Please see the applicable RPSL or 16 * RCSL for the rights, obligations and limitations governing use of the 17 * contents of the file. 18 * 19 * This file is part of the Helix DNA Technology. RealNetworks is the 20 * developer of the Original Code and owns the copyrights in the portions 21 * it created. 22 * 23 * This file, and the files included with this file, is distributed and made 24 * available on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER 25 * EXPRESS OR IMPLIED, AND REALNETWORKS HEREBY DISCLAIMS ALL SUCH WARRANTIES, 26 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, FITNESS 27 * FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. 28 * 29 * Technology Compatibility Kit Test Suite(s) Location: 30 * http://www.helixcommunity.org/content/tck 31 * 32 * Contributor(s): 33 * 34 * ***** END LICENSE BLOCK ***** */ 35 36 /************************************************************************************** 37 * Fixed-point MP3 decoder 38 * Jon Recker (jrecker@real.com), Ken Cooke (kenc@real.com) 39 * June 2003 40 * 41 * mp3tabs.c - platform-independent tables for MP3 decoder (global, read-only) 42 **************************************************************************************/ 43 44 #include "mp3common.h" 45 46 /* indexing = [version][samplerate index] 47 * sample rate of frame (Hz) 48 */ 49 const int samplerateTab[3][3] = { 50 {44100, 48000, 32000}, /* MPEG-1 */ 51 {22050, 24000, 16000}, /* MPEG-2 */ 52 {11025, 12000, 8000}, /* MPEG-2.5 */ 53 }; 54 55 /* indexing = [version][layer][bitrate index] 56 * bitrate (kbps) of frame 57 * - bitrate index == 0 is "free" mode (bitrate determined on the fly by 58 * counting bits between successive sync words) 59 */ 60 const short bitrateTab[3][3][15] = { 61 { 62 /* MPEG-1 */ 63 { 0, 32, 64, 96,128,160,192,224,256,288,320,352,384,416,448}, /* Layer 1 */ 64 { 0, 32, 48, 56, 64, 80, 96,112,128,160,192,224,256,320,384}, /* Layer 2 */ 65 { 0, 32, 40, 48, 56, 64, 80, 96,112,128,160,192,224,256,320}, /* Layer 3 */ 66 }, 67 { 68 /* MPEG-2 */ 69 { 0, 32, 48, 56, 64, 80, 96,112,128,144,160,176,192,224,256}, /* Layer 1 */ 70 { 0, 8, 16, 24, 32, 40, 48, 56, 64, 80, 96,112,128,144,160}, /* Layer 2 */ 71 { 0, 8, 16, 24, 32, 40, 48, 56, 64, 80, 96,112,128,144,160}, /* Layer 3 */ 72 }, 73 { 74 /* MPEG-2.5 */ 75 { 0, 32, 48, 56, 64, 80, 96,112,128,144,160,176,192,224,256}, /* Layer 1 */ 76 { 0, 8, 16, 24, 32, 40, 48, 56, 64, 80, 96,112,128,144,160}, /* Layer 2 */ 77 { 0, 8, 16, 24, 32, 40, 48, 56, 64, 80, 96,112,128,144,160}, /* Layer 3 */ 78 }, 79 }; 80 81 /* indexing = [version][layer] 82 * number of samples in one frame (per channel) 83 */ 84 const short samplesPerFrameTab[3][3] = { 85 {384, 1152, 1152 }, /* MPEG1 */ 86 {384, 1152, 576 }, /* MPEG2 */ 87 {384, 1152, 576 }, /* MPEG2.5 */ 88 }; 89 90 /* layers 1, 2, 3 */ 91 const short bitsPerSlotTab[3] = {32, 8, 8}; 92 93 /* indexing = [version][mono/stereo] 94 * number of bytes in side info section of bitstream 95 */ 96 const short sideBytesTab[3][2] = { 97 {17, 32}, /* MPEG-1: mono, stereo */ 98 { 9, 17}, /* MPEG-2: mono, stereo */ 99 { 9, 17}, /* MPEG-2.5: mono, stereo */ 100 }; 101 102 /* indexing = [version][sampleRate][bitRate] 103 * for layer3, nSlots = floor(samps/frame * bitRate / sampleRate / 8) 104 * - add one pad slot if necessary 105 */ 106 const short slotTab[3][3][15] = { 107 { 108 /* MPEG-1 */ 109 { 0, 104, 130, 156, 182, 208, 261, 313, 365, 417, 522, 626, 731, 835,1044 }, /* 44 kHz */ 110 { 0, 96, 120, 144, 168, 192, 240, 288, 336, 384, 480, 576, 672, 768, 960 }, /* 48 kHz */ 111 { 0, 144, 180, 216, 252, 288, 360, 432, 504, 576, 720, 864,1008,1152,1440 }, /* 32 kHz */ 112 }, 113 { 114 /* MPEG-2 */ 115 { 0, 26, 52, 78, 104, 130, 156, 182, 208, 261, 313, 365, 417, 470, 522 }, /* 22 kHz */ 116 { 0, 24, 48, 72, 96, 120, 144, 168, 192, 240, 288, 336, 384, 432, 480 }, /* 24 kHz */ 117 { 0, 36, 72, 108, 144, 180, 216, 252, 288, 360, 432, 504, 576, 648, 720 }, /* 16 kHz */ 118 }, 119 { 120 /* MPEG-2.5 */ 121 { 0, 52, 104, 156, 208, 261, 313, 365, 417, 522, 626, 731, 835, 940,1044 }, /* 11 kHz */ 122 { 0, 48, 96, 144, 192, 240, 288, 336, 384, 480, 576, 672, 768, 864, 960 }, /* 12 kHz */ 123 { 0, 72, 144, 216, 288, 360, 432, 504, 576, 720, 864,1008,1152,1296,1440 }, /* 8 kHz */ 124 }, 125 }; 126 127 /* indexing = [version][sampleRate][long (.l) or short (.s) block] 128 * sfBandTable[v][s].l[cb] = index of first bin in critical band cb (long blocks) 129 * sfBandTable[v][s].s[cb] = index of first bin in critical band cb (short blocks) 130 */ 131 const SFBandTable sfBandTable[3][3] = { 132 { 133 /* MPEG-1 (44, 48, 32 kHz) */ 134 { 135 { 0, 4, 8, 12, 16, 20, 24, 30, 36, 44, 52, 62, 74, 90,110,134,162,196,238,288,342,418,576 }, 136 { 0, 4, 8, 12, 16, 22, 30, 40, 52, 66, 84,106,136,192 } 137 }, 138 { 139 { 0, 4, 8, 12, 16, 20, 24, 30, 36, 42, 50, 60, 72, 88,106,128,156,190,230,276,330,384,576 }, 140 { 0, 4, 8, 12, 16, 22, 28, 38, 50, 64, 80,100,126,192 } 141 }, 142 { 143 { 0, 4, 8, 12, 16, 20, 24, 30, 36, 44, 54, 66, 82,102,126,156,194,240,296,364,448,550,576 }, 144 { 0, 4, 8, 12, 16, 22, 30, 42, 58, 78,104,138,180,192 } 145 } 146 }, 147 148 { 149 /* MPEG-2 (22, 24, 16 kHz) */ 150 { 151 { 0, 6, 12, 18, 24, 30, 36, 44, 54, 66, 80, 96,116,140,168,200,238,284,336,396,464,522,576 }, 152 { 0, 4, 8, 12, 18, 24, 32, 42, 56, 74,100,132,174,192 } 153 }, 154 { 155 { 0, 6, 12, 18, 24, 30, 36, 44, 54, 66, 80, 96,114,136,162,194,232,278,332,394,464,540,576 }, 156 { 0, 4, 8, 12, 18, 26, 36, 48, 62, 80,104,136,180,192 } 157 }, 158 { 159 { 0, 6, 12, 18, 24, 30, 36, 44, 54, 66, 80, 96,116,140,168,200,238,284,336,396,464,522,576 }, 160 { 0, 4, 8, 12, 18, 26, 36, 48, 62, 80,104,134,174,192 } 161 }, 162 }, 163 164 { 165 /* MPEG-2.5 (11, 12, 8 kHz) */ 166 { 167 { 0, 6, 12, 18, 24, 30, 36, 44, 54, 66, 80, 96,116,140,168,200,238,284,336,396,464,522,576 }, 168 { 0, 4, 8, 12, 18, 26, 36, 48, 62, 80,104,134,174,192 } 169 }, 170 { 171 { 0, 6, 12, 18, 24, 30, 36, 44, 54, 66, 80, 96,116,140,168,200,238,284,336,396,464,522,576 }, 172 { 0, 4, 8, 12, 18, 26, 36, 48, 62, 80,104,134,174,192 } 173 }, 174 { 175 { 0, 12, 24, 36, 48, 60, 72, 88,108,132,160,192,232,280,336,400,476,566,568,570,572,574,576 }, 176 { 0, 8, 16, 24, 36, 52, 72, 96,124,160,162,164,166,192 } 177 }, 178 }, 179 }; 180 181