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Diffstat (limited to 'songdbj/com/jcraft/jorbis/Lookup.java')
-rw-r--r-- | songdbj/com/jcraft/jorbis/Lookup.java | 154 |
1 files changed, 0 insertions, 154 deletions
diff --git a/songdbj/com/jcraft/jorbis/Lookup.java b/songdbj/com/jcraft/jorbis/Lookup.java deleted file mode 100644 index fb7651a19f..0000000000 --- a/songdbj/com/jcraft/jorbis/Lookup.java +++ /dev/null | |||
@@ -1,154 +0,0 @@ | |||
1 | /* JOrbis | ||
2 | * Copyright (C) 2000 ymnk, JCraft,Inc. | ||
3 | * | ||
4 | * Written by: 2000 ymnk<ymnk@jcraft.com> | ||
5 | * | ||
6 | * Many thanks to | ||
7 | * Monty <monty@xiph.org> and | ||
8 | * The XIPHOPHORUS Company http://www.xiph.org/ . | ||
9 | * JOrbis has been based on their awesome works, Vorbis codec. | ||
10 | * | ||
11 | * This program is free software; you can redistribute it and/or | ||
12 | * modify it under the terms of the GNU Library General Public License | ||
13 | * as published by the Free Software Foundation; either version 2 of | ||
14 | * the License, or (at your option) any later version. | ||
15 | |||
16 | * This program is distributed in the hope that it will be useful, | ||
17 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
18 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
19 | * GNU Library General Public License for more details. | ||
20 | * | ||
21 | * You should have received a copy of the GNU Library General Public | ||
22 | * License along with this program; if not, write to the Free Software | ||
23 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | ||
24 | */ | ||
25 | |||
26 | package com.jcraft.jorbis; | ||
27 | |||
28 | class Lookup{ | ||
29 | static final int COS_LOOKUP_SZ=128; | ||
30 | static final float[] COS_LOOKUP={ | ||
31 | +1.0000000000000f,+0.9996988186962f,+0.9987954562052f,+0.9972904566787f, | ||
32 | +0.9951847266722f,+0.9924795345987f,+0.9891765099648f,+0.9852776423889f, | ||
33 | +0.9807852804032f,+0.9757021300385f,+0.9700312531945f,+0.9637760657954f, | ||
34 | +0.9569403357322f,+0.9495281805930f,+0.9415440651830f,+0.9329927988347f, | ||
35 | +0.9238795325113f,+0.9142097557035f,+0.9039892931234f,+0.8932243011955f, | ||
36 | +0.8819212643484f,+0.8700869911087f,+0.8577286100003f,+0.8448535652497f, | ||
37 | +0.8314696123025f,+0.8175848131516f,+0.8032075314806f,+0.7883464276266f, | ||
38 | +0.7730104533627f,+0.7572088465065f,+0.7409511253550f,+0.7242470829515f, | ||
39 | +0.7071067811865f,+0.6895405447371f,+0.6715589548470f,+0.6531728429538f, | ||
40 | +0.6343932841636f,+0.6152315905806f,+0.5956993044924f,+0.5758081914178f, | ||
41 | +0.5555702330196f,+0.5349976198871f,+0.5141027441932f,+0.4928981922298f, | ||
42 | +0.4713967368260f,+0.4496113296546f,+0.4275550934303f,+0.4052413140050f, | ||
43 | +0.3826834323651f,+0.3598950365350f,+0.3368898533922f,+0.3136817403989f, | ||
44 | +0.2902846772545f,+0.2667127574749f,+0.2429801799033f,+0.2191012401569f, | ||
45 | +0.1950903220161f,+0.1709618887603f,+0.1467304744554f,+0.1224106751992f, | ||
46 | +0.0980171403296f,+0.0735645635997f,+0.0490676743274f,+0.0245412285229f, | ||
47 | +0.0000000000000f,-0.0245412285229f,-0.0490676743274f,-0.0735645635997f, | ||
48 | -0.0980171403296f,-0.1224106751992f,-0.1467304744554f,-0.1709618887603f, | ||
49 | -0.1950903220161f,-0.2191012401569f,-0.2429801799033f,-0.2667127574749f, | ||
50 | -0.2902846772545f,-0.3136817403989f,-0.3368898533922f,-0.3598950365350f, | ||
51 | -0.3826834323651f,-0.4052413140050f,-0.4275550934303f,-0.4496113296546f, | ||
52 | -0.4713967368260f,-0.4928981922298f,-0.5141027441932f,-0.5349976198871f, | ||
53 | -0.5555702330196f,-0.5758081914178f,-0.5956993044924f,-0.6152315905806f, | ||
54 | -0.6343932841636f,-0.6531728429538f,-0.6715589548470f,-0.6895405447371f, | ||
55 | -0.7071067811865f,-0.7242470829515f,-0.7409511253550f,-0.7572088465065f, | ||
56 | -0.7730104533627f,-0.7883464276266f,-0.8032075314806f,-0.8175848131516f, | ||
57 | -0.8314696123025f,-0.8448535652497f,-0.8577286100003f,-0.8700869911087f, | ||
58 | -0.8819212643484f,-0.8932243011955f,-0.9039892931234f,-0.9142097557035f, | ||
59 | -0.9238795325113f,-0.9329927988347f,-0.9415440651830f,-0.9495281805930f, | ||
60 | -0.9569403357322f,-0.9637760657954f,-0.9700312531945f,-0.9757021300385f, | ||
61 | -0.9807852804032f,-0.9852776423889f,-0.9891765099648f,-0.9924795345987f, | ||
62 | -0.9951847266722f,-0.9972904566787f,-0.9987954562052f,-0.9996988186962f, | ||
63 | -1.0000000000000f, | ||
64 | }; | ||
65 | /* interpolated lookup based cos function, domain 0 to PI only */ | ||
66 | static float coslook(float a){ | ||
67 | double d=a*(.31830989*(float)COS_LOOKUP_SZ); | ||
68 | int i=(int)d; | ||
69 | return COS_LOOKUP[i]+ ((float)(d-i))*(COS_LOOKUP[i+1]-COS_LOOKUP[i]); | ||
70 | } | ||
71 | |||
72 | static final int INVSQ_LOOKUP_SZ=32; | ||
73 | static final float[] INVSQ_LOOKUP={ | ||
74 | 1.414213562373f,1.392621247646f,1.371988681140f,1.352246807566f, | ||
75 | 1.333333333333f,1.315191898443f,1.297771369046f,1.281025230441f, | ||
76 | 1.264911064067f,1.249390095109f,1.234426799697f,1.219988562661f, | ||
77 | 1.206045378311f,1.192569588000f,1.179535649239f,1.166919931983f, | ||
78 | 1.154700538379f,1.142857142857f,1.131370849898f,1.120224067222f, | ||
79 | 1.109400392450f,1.098884511590f,1.088662107904f,1.078719779941f, | ||
80 | 1.069044967650f,1.059625885652f,1.050451462878f,1.041511287847f, | ||
81 | 1.032795558989f,1.024295039463f,1.016001016002f,1.007905261358f, | ||
82 | 1.000000000000f, | ||
83 | }; | ||
84 | /* interpolated 1./sqrt(p) where .5 <= p < 1. */ | ||
85 | static float invsqlook(float a){ | ||
86 | // System.out.println(a); | ||
87 | double d=a*(2.f*(float)INVSQ_LOOKUP_SZ)-(float)INVSQ_LOOKUP_SZ; | ||
88 | int i=(int)d; | ||
89 | return INVSQ_LOOKUP[i]+ ((float)(d-i))*(INVSQ_LOOKUP[i+1]-INVSQ_LOOKUP[i]); | ||
90 | } | ||
91 | |||
92 | static final int INVSQ2EXP_LOOKUP_MIN=-32; | ||
93 | static final int INVSQ2EXP_LOOKUP_MAX=32; | ||
94 | static final float[] INVSQ2EXP_LOOKUP={ | ||
95 | 65536.f, 46340.95001f, 32768.f, 23170.47501f, | ||
96 | 16384.f, 11585.2375f, 8192.f, 5792.618751f, | ||
97 | 4096.f, 2896.309376f, 2048.f, 1448.154688f, | ||
98 | 1024.f, 724.0773439f, 512.f, 362.038672f, | ||
99 | 256.f, 181.019336f, 128.f, 90.50966799f, | ||
100 | 64.f, 45.254834f, 32.f, 22.627417f, | ||
101 | 16.f, 11.3137085f, 8.f, 5.656854249f, | ||
102 | 4.f, 2.828427125f, 2.f, 1.414213562f, | ||
103 | 1.f, 0.7071067812f, 0.5f, 0.3535533906f, | ||
104 | 0.25f, 0.1767766953f, 0.125f, 0.08838834765f, | ||
105 | 0.0625f, 0.04419417382f, 0.03125f, 0.02209708691f, | ||
106 | 0.015625f, 0.01104854346f, 0.0078125f, 0.005524271728f, | ||
107 | 0.00390625f, 0.002762135864f, 0.001953125f, 0.001381067932f, | ||
108 | 0.0009765625f, 0.000690533966f, 0.00048828125f, 0.000345266983f, | ||
109 | 0.000244140625f,0.0001726334915f,0.0001220703125f,8.631674575e-05f, | ||
110 | 6.103515625e-05f,4.315837288e-05f,3.051757812e-05f,2.157918644e-05f, | ||
111 | 1.525878906e-05f, | ||
112 | }; | ||
113 | /* interpolated 1./sqrt(p) where .5 <= p < 1. */ | ||
114 | static float invsq2explook(int a){ | ||
115 | return INVSQ2EXP_LOOKUP[a-INVSQ2EXP_LOOKUP_MIN]; | ||
116 | } | ||
117 | |||
118 | static final int FROMdB_LOOKUP_SZ=35; | ||
119 | static final int FROMdB2_LOOKUP_SZ=32; | ||
120 | static final int FROMdB_SHIFT=5; | ||
121 | static final int FROMdB2_SHIFT=3; | ||
122 | static final int FROMdB2_MASK=31; | ||
123 | static final float[] FROMdB_LOOKUP={ | ||
124 | 1.f, 0.6309573445f, 0.3981071706f, 0.2511886432f, | ||
125 | 0.1584893192f, 0.1f, 0.06309573445f, 0.03981071706f, | ||
126 | 0.02511886432f, 0.01584893192f, 0.01f, 0.006309573445f, | ||
127 | 0.003981071706f, 0.002511886432f, 0.001584893192f, 0.001f, | ||
128 | 0.0006309573445f,0.0003981071706f,0.0002511886432f,0.0001584893192f, | ||
129 | 0.0001f,6.309573445e-05f,3.981071706e-05f,2.511886432e-05f, | ||
130 | 1.584893192e-05f, 1e-05f,6.309573445e-06f,3.981071706e-06f, | ||
131 | 2.511886432e-06f,1.584893192e-06f, 1e-06f,6.309573445e-07f, | ||
132 | 3.981071706e-07f,2.511886432e-07f,1.584893192e-07f, | ||
133 | }; | ||
134 | static final float[] FROMdB2_LOOKUP={ | ||
135 | 0.9928302478f, 0.9786445908f, 0.9646616199f, 0.9508784391f, | ||
136 | 0.9372921937f, 0.92390007f, 0.9106992942f, 0.8976871324f, | ||
137 | 0.8848608897f, 0.8722179097f, 0.8597555737f, 0.8474713009f, | ||
138 | 0.835362547f, 0.8234268041f, 0.8116616003f, 0.8000644989f, | ||
139 | 0.7886330981f, 0.7773650302f, 0.7662579617f, 0.755309592f, | ||
140 | 0.7445176537f, 0.7338799116f, 0.7233941627f, 0.7130582353f, | ||
141 | 0.7028699885f, 0.6928273125f, 0.6829281272f, 0.6731703824f, | ||
142 | 0.6635520573f, 0.6540711597f, 0.6447257262f, 0.6355138211f, | ||
143 | }; | ||
144 | /* interpolated lookup based fromdB function, domain -140dB to 0dB only */ | ||
145 | static float fromdBlook(float a){ | ||
146 | int i=(int)(a*((float)(-(1<<FROMdB2_SHIFT)))); | ||
147 | return (i<0)?1.f: | ||
148 | ((i>=(FROMdB_LOOKUP_SZ<<FROMdB_SHIFT))?0.f: | ||
149 | FROMdB_LOOKUP[i>>>FROMdB_SHIFT]*FROMdB2_LOOKUP[i&FROMdB2_MASK]); | ||
150 | } | ||
151 | |||
152 | } | ||
153 | |||
154 | |||