1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/os/mm/devsound/sounddevbt/src/Plugin/Codec/SBCEncoder/BtSBCConst.h Fri Jun 15 03:10:57 2012 +0200
1.3 @@ -0,0 +1,180 @@
1.4 +// Copyright (c) 2005-2009 Nokia Corporation and/or its subsidiary(-ies).
1.5 +// All rights reserved.
1.6 +// This component and the accompanying materials are made available
1.7 +// under the terms of "Eclipse Public License v1.0"
1.8 +// which accompanies this distribution, and is available
1.9 +// at the URL "http://www.eclipse.org/legal/epl-v10.html".
1.10 +//
1.11 +// Initial Contributors:
1.12 +// Nokia Corporation - initial contribution.
1.13 +//
1.14 +// Contributors:
1.15 +//
1.16 +// Description:
1.17 +//
1.18 +
1.19 +#ifndef __SBCCONST_H__
1.20 +#define __SBCCONST_H__
1.21 +
1.22 +/**
1.23 +SBC Syncword, used in the begin of each sbc frame to identify sbc frame,
1.24 +it's value is always 0x9c
1.25 +*/
1.26 +const TUint8 KSBCFrameSyncWord = 0x9c;
1.27 +
1.28 +/**
1.29 +This table is used to calculate bit allocation for 4 subbands sbc frame
1.30 +with Loudness allocation method
1.31 +*/
1.32 +const TInt8 KSBCOffset4[4][4] =
1.33 + {
1.34 + {-1, 0, 0, 0}, // fs = 16000
1.35 + {-2, 0, 0, 1}, // fs = 32000
1.36 + {-2, 0, 0, 1}, // fs = 44100
1.37 + {-2, 0, 0, 1} // fs = 48000
1.38 + };
1.39 +
1.40 +/**
1.41 +This table is used to calculate bit allocation for 8 subbands sbc frame
1.42 +with Loudness allocation method
1.43 +*/
1.44 +const TInt8 KSBCOffset8[4][8] =
1.45 + {
1.46 + {-2, 0, 0, 0, 0, 0, 0, 1}, // fs = 16000
1.47 + {-3, 0, 0, 0, 0, 0, 1, 2}, // fs = 32000
1.48 + {-4, 0, 0, 0, 0, 0, 1, 2}, // fs = 44100
1.49 + {-4, 0, 0, 0, 0, 0, 1, 2} // fs = 48000
1.50 + };
1.51 +
1.52 +/**
1.53 +2^32, scale value of Table KSBCProto4 and KSBCProto8.
1.54 +*/
1.55 +const TUint8 KSBCProtoBitsShift = 32;
1.56 +
1.57 +/**
1.58 +Table KSBCProto4 is derived form Table Proto_4_40 (see A2DP spec for detail)
1.59 +by scaling up by 2^32, it is for the Analysis process for 4 subbands sbc frames,
1.60 +we are using integer numbers for high speed, after the calculation the results
1.61 +will be scaled down by the same value.
1.62 +*/
1.63 +const TInt32 KSBCProto4[40] =
1.64 + {
1.65 + 0, 2304460, 6407591, 11741191,
1.66 + 16480657, 16716234, 8013623, -13143128,
1.67 + 46874251, 87782726, 124020356, 138271872,
1.68 + 111139929, 26338680, -123788377, -333488531,
1.69 + 582368677, 837466400, 1059296397, 1210442915,
1.70 + 1264074726, 1210442915, 1059296397, 837466400,
1.71 + -582368677, -333488531, -123788377, 26338680,
1.72 + 111139929, 138271872, 124020356, 87782726,
1.73 + -46874251, -13143128, 8013623, 16716234,
1.74 + 16480657, 11741191, 6407591, 2304460
1.75 + };
1.76 +
1.77 +/**
1.78 +Table KSBCProto8 is derived form Table Proto_8_80 (see A2DP spec for detail)
1.79 +by scaling up by 2^32, it is for the Analysis process for 8 subbands sbc frames,
1.80 +we are using integer numbers for high speed, after the calculation the results
1.81 +will be scaled down by the same value.
1.82 +*/
1.83 +const TInt32 KSBCProto8[80] =
1.84 + {
1.85 + 0, 672486, 1474275, 2382076,
1.86 + 3538707, 4895941, 6341097, 7661007,
1.87 + 8640724, 9035408, 8566508, 6943084,
1.88 + 3874724, -767963, -7085541, -15020250,
1.89 + 24307345, 34486060, 44918676, 54748951,
1.90 + 62932121, 68309566, 69668008, 65792073,
1.91 + 55564768, 38042997, 12558847, -21113115,
1.92 + -62880072, -112141060, -167826440, -228437728,
1.93 + 292053237, 356416821, 419083117, 477586143,
1.94 + 529417202, 572366304, 604531701, 624444638,
1.95 + 631167211, 624444638, 604531701, 572366304,
1.96 + 529417202, 477586143, 419083117, 356416821,
1.97 + -292053237, -228437728, -167826440, -112141060,
1.98 + -62880072, -21113115, 12558847, 38042997,
1.99 + 55564768, 65792073, 69668008, 68309566,
1.100 + 62932121, 54748951, 44918676, 34486060,
1.101 + -24307345, -15020250, -7085541, -767963,
1.102 + 3874724, 6943084, 8566508, 9035408,
1.103 + 8640724, 7661007, 6341097, 4895941,
1.104 + 3538707, 2382076, 1474275, 672486
1.105 + };
1.106 +
1.107 +
1.108 +/**
1.109 +2^30, scale value of Table KSBCAnalysisMatrix4 and KSBCAnalysisMatrix8.
1.110 +*/
1.111 +const TUint8 KSBCAnalysisMatrixBitsShift = 30;
1.112 +
1.113 +/**
1.114 +Table of cos((i + 0.5) * (k - 2) * PI / 4) * 2^30
1.115 +This table is used in Analysis process for 4 subbands, here we are using
1.116 +integer values instead of real values for high speed, the values are scaled
1.117 +up by 2^30, after calculation the results will be scaled down by the same value.
1.118 +*/
1.119 +const TInt32 KSBCAnalysisMatrix4[4][8] =
1.120 + {
1.121 + { 759250125, 992008094, 1073741824, 992008094,
1.122 + 759250125, 410903207, 0, -410903207 },
1.123 +
1.124 + { -759250125, 410903207, 1073741824, 410903207,
1.125 + -759250125, -992008094, 0, 992008094 },
1.126 +
1.127 + { -759250125, -410903207, 1073741824, -410903207,
1.128 + -759250125, 992008094, 0, -992008094 },
1.129 +
1.130 + { 759250125, -992008094, 1073741824, -992008094,
1.131 + 759250125, -410903207, 0, 410903207 }
1.132 + };
1.133 +
1.134 +/**
1.135 +Table of cos((i + 0.5) * (k - 4) * PI / 8) * 2^30
1.136 +This table is used in Analysis process for 8 subbands, here we are using
1.137 +integer values instead of real values for high speed, the values are scaled
1.138 +up by 2^30, after calculation the results will be scaled down by the same value.
1.139 +*/
1.140 +const TInt32 KSBCAnalysisMatrix8[8][16] =
1.141 + {
1.142 + { 759250125, 892783698, 992008094, 1053110176,
1.143 + 1073741824, 1053110176, 992008094, 892783698,
1.144 + 759250125, 596538995, 410903207, 209476638,
1.145 + 0, -209476638, -410903207, -596538995 },
1.146 +
1.147 + { -759250125, -209476638, 410903207, 892783698,
1.148 + 1073741824, 892783698, 410903207, -209476638,
1.149 + -759250125, -1053110176, -992008094, -596538995,
1.150 + 0, 596538995, 992008094, 1053110176 },
1.151 +
1.152 + { -759250125, -1053110176, -410903207, 596538995,
1.153 + 1073741824, 596538995, -410903207, -1053110176,
1.154 + -759250125, 209476638, 992008094, 892783698,
1.155 + 0, -892783698, -992008094, -209476638 },
1.156 +
1.157 + { 759250125, -596538995, -992008094, 209476638,
1.158 + 1073741824, 209476638, -992008094, -596538995,
1.159 + 759250125, 892783698, -410903207, -1053110176,
1.160 + 0, 1053110176, 410903207, -892783698 },
1.161 +
1.162 + { 759250125, 596538995, -992008094, -209476638,
1.163 + 1073741824, -209476638, -992008094, 596538995,
1.164 + 759250125, -892783698, -410903207, 1053110176,
1.165 + 0, -1053110176, 410903207, 892783698 },
1.166 +
1.167 + { -759250125, 1053110176, -410903207, -596538995,
1.168 + 1073741824, -596538995, -410903207, 1053110176,
1.169 + -759250125, -209476638, 992008094, -892783698,
1.170 + 0, 892783698, -992008094, 209476638 },
1.171 +
1.172 + { -759250125, 209476638, 410903207, -892783698,
1.173 + 1073741824, -892783698, 410903207, 209476638,
1.174 + -759250125, 1053110176, -992008094, 596538995,
1.175 + 0, -596538995, 992008094, -1053110176 },
1.176 +
1.177 + { 759250125, -892783698, 992008094, -1053110176,
1.178 + 1073741824, -1053110176, 992008094, -892783698,
1.179 + 759250125, -596538995, 410903207, -209476638,
1.180 + 0, 209476638, -410903207, 596538995 }
1.181 + };
1.182 +
1.183 +#endif // __SBCCONST_H__