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1 /* -----------------------------------------------------------------------------
2 Software License for The Fraunhofer FDK AAC Codec Library for Android
3 
4 © Copyright  1995 - 2019 Fraunhofer-Gesellschaft zur Förderung der angewandten
5 Forschung e.V. All rights reserved.
6 
7  1.    INTRODUCTION
8 The Fraunhofer FDK AAC Codec Library for Android ("FDK AAC Codec") is software
9 that implements the MPEG Advanced Audio Coding ("AAC") encoding and decoding
10 scheme for digital audio. This FDK AAC Codec software is intended to be used on
11 a wide variety of Android devices.
12 
13 AAC's HE-AAC and HE-AAC v2 versions are regarded as today's most efficient
14 general perceptual audio codecs. AAC-ELD is considered the best-performing
15 full-bandwidth communications codec by independent studies and is widely
16 deployed. AAC has been standardized by ISO and IEC as part of the MPEG
17 specifications.
18 
19 Patent licenses for necessary patent claims for the FDK AAC Codec (including
20 those of Fraunhofer) may be obtained through Via Licensing
21 (www.vialicensing.com) or through the respective patent owners individually for
22 the purpose of encoding or decoding bit streams in products that are compliant
23 with the ISO/IEC MPEG audio standards. Please note that most manufacturers of
24 Android devices already license these patent claims through Via Licensing or
25 directly from the patent owners, and therefore FDK AAC Codec software may
26 already be covered under those patent licenses when it is used for those
27 licensed purposes only.
28 
29 Commercially-licensed AAC software libraries, including floating-point versions
30 with enhanced sound quality, are also available from Fraunhofer. Users are
31 encouraged to check the Fraunhofer website for additional applications
32 information and documentation.
33 
34 2.    COPYRIGHT LICENSE
35 
36 Redistribution and use in source and binary forms, with or without modification,
37 are permitted without payment of copyright license fees provided that you
38 satisfy the following conditions:
39 
40 You must retain the complete text of this software license in redistributions of
41 the FDK AAC Codec or your modifications thereto in source code form.
42 
43 You must retain the complete text of this software license in the documentation
44 and/or other materials provided with redistributions of the FDK AAC Codec or
45 your modifications thereto in binary form. You must make available free of
46 charge copies of the complete source code of the FDK AAC Codec and your
47 modifications thereto to recipients of copies in binary form.
48 
49 The name of Fraunhofer may not be used to endorse or promote products derived
50 from this library without prior written permission.
51 
52 You may not charge copyright license fees for anyone to use, copy or distribute
53 the FDK AAC Codec software or your modifications thereto.
54 
55 Your modified versions of the FDK AAC Codec must carry prominent notices stating
56 that you changed the software and the date of any change. For modified versions
57 of the FDK AAC Codec, the term "Fraunhofer FDK AAC Codec Library for Android"
58 must be replaced by the term "Third-Party Modified Version of the Fraunhofer FDK
59 AAC Codec Library for Android."
60 
61 3.    NO PATENT LICENSE
62 
63 NO EXPRESS OR IMPLIED LICENSES TO ANY PATENT CLAIMS, including without
64 limitation the patents of Fraunhofer, ARE GRANTED BY THIS SOFTWARE LICENSE.
65 Fraunhofer provides no warranty of patent non-infringement with respect to this
66 software.
67 
68 You may use this FDK AAC Codec software or modifications thereto only for
69 purposes that are authorized by appropriate patent licenses.
70 
71 4.    DISCLAIMER
72 
73 This FDK AAC Codec software is provided by Fraunhofer on behalf of the copyright
74 holders and contributors "AS IS" and WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES,
75 including but not limited to the implied warranties of merchantability and
76 fitness for a particular purpose. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
77 CONTRIBUTORS BE LIABLE for any direct, indirect, incidental, special, exemplary,
78 or consequential damages, including but not limited to procurement of substitute
79 goods or services; loss of use, data, or profits, or business interruption,
80 however caused and on any theory of liability, whether in contract, strict
81 liability, or tort (including negligence), arising in any way out of the use of
82 this software, even if advised of the possibility of such damage.
83 
84 5.    CONTACT INFORMATION
85 
86 Fraunhofer Institute for Integrated Circuits IIS
87 Attention: Audio and Multimedia Departments - FDK AAC LL
88 Am Wolfsmantel 33
89 91058 Erlangen, Germany
90 
91 www.iis.fraunhofer.de/amm
92 amm-info@iis.fraunhofer.de
93 ----------------------------------------------------------------------------- */
94 
95 /*********************** MPEG surround decoder library *************************
96 
97    Author(s):
98 
99    Description: SAC Dec tables
100 
101 *******************************************************************************/
102 
103 #ifndef SAC_ROM_H
104 #define SAC_ROM_H
105 
106 #include "FDK_archdef.h"
107 #include "sac_dec_interface.h"
108 
109 #include "huff_nodes.h"
110 #include "sac_bitdec.h"
111 #include "machine_type.h"
112 
113 /* Global ROM table data type: */
114 #ifndef ARCH_PREFER_MULT_32x32
115 #define FIXP_CFG FIXP_SGL
116 #define FX_CFG2FX_DBL FX_SGL2FX_DBL
117 #define FX_CFG2FX_SGL
118 #define CFG(a) (FX_DBL2FXCONST_SGL(a))
119 #define FL2FXCONST_CFG FL2FXCONST_SGL
120 #define FX_DBL2FX_CFG(x) FX_DBL2FX_SGL((FIXP_DBL)(x))
121 #else
122 #define FIXP_CFG FIXP_DBL
123 #define FX_CFG2FX_DBL
124 #define FX_CFG2FX_SGL FX_DBL2FX_SGL
125 #define CFG(a) FIXP_DBL(a)
126 #define FL2FXCONST_CFG FL2FXCONST_DBL
127 #define FX_DBL2FX_CFG(x) ((FIXP_DBL)(x))
128 #endif
129 
130 /* others  */
131 #define SCALE_INV_ICC (2)
132 #define G_dd_SCALE (2)
133 
134 #define QCC_SCALE 1
135 #define M1M2_DATA FIXP_DBL
136 #ifndef ARCH_PREFER_MULT_32x32
137 #define M1M2_CDATA FIXP_SGL
138 #define M1M2_CDATA2FX_DBL(a) FX_SGL2FX_DBL(a)
139 #define FX_DBL2M1M2_CDATA(a) FX_DBL2FX_SGL(a)
140 #else
141 #define M1M2_CDATA FIXP_DBL
142 #define M1M2_CDATA2FX_DBL(a) (a)
143 #define FX_DBL2M1M2_CDATA(a) (a)
144 #endif
145 
146 #define CLIP_PROTECT_GAIN_0(x) FL2FXCONST_CFG(((x) / (float)(1 << 0)))
147 #define CLIP_PROTECT_GAIN_1(x) FL2FXCONST_CFG(((x) / (float)(1 << 1)))
148 #define CLIP_PROTECT_GAIN_2(x) FL2FXCONST_CFG(((x) / (float)(1 << 2)))
149 
150 #define SF_CLD_C1C2 (9)
151 
152 extern const FIXP_CFG dequantCPC__FDK[];
153 extern const FIXP_CFG dequantICC__FDK[8];
154 extern const FIXP_CFG dequantCLD__FDK[31];
155 
156 #define IPD_SCALE (5)
157 #define PI__IPD (FL2FXCONST_DBL(3.1415926535897932f / (float)(1 << IPD_SCALE)))
158 /* Define for PI*2 for better precision in  SpatialDecApplyPhase() */
159 #define PIx2__IPD \
160   (FL2FXCONST_DBL(3.1415926535897932f / (float)(1 << (IPD_SCALE - 1))))
161 
162 extern const FIXP_CFG dequantIPD__FDK[16];
163 extern const FIXP_DBL dequantIPD_CLD_ICC_splitAngle__FDK[15][31][8];
164 
165 extern const FIXP_CFG H11_nc[31][8];
166 extern const FIXP_CFG H12_nc[31][8];
167 
168 extern const FIXP_DBL dequantCLD_c1[31];
169 
170 extern const FIXP_CFG BP__FDK[];
171 extern const FIXP_CFG BP_GF__FDK[];
172 extern const SCHAR row2channelSTP[][MAX_M2_INPUT];
173 
174 /* sac_bitdec */
175 extern const INT samplingFreqTable[16];
176 extern const UCHAR freqResTable[];
177 extern const UCHAR freqResTable_LD[];
178 extern const UCHAR tempShapeChanTable[2][8];
179 extern const TREEPROPERTIES treePropertyTable[];
180 
181 extern const SCHAR kernels_4_to_71[MAX_HYBRID_BANDS];
182 extern const SCHAR kernels_5_to_71[MAX_HYBRID_BANDS];
183 extern const SCHAR kernels_7_to_71[MAX_HYBRID_BANDS];
184 extern const SCHAR kernels_10_to_71[MAX_HYBRID_BANDS];
185 extern const SCHAR kernels_14_to_71[MAX_HYBRID_BANDS];
186 extern const SCHAR kernels_20_to_71[MAX_HYBRID_BANDS];
187 extern const SCHAR kernels_28_to_71[MAX_HYBRID_BANDS];
188 
189 extern const UCHAR mapping_4_to_28[MAX_PARAMETER_BANDS];
190 extern const UCHAR mapping_5_to_28[MAX_PARAMETER_BANDS];
191 extern const UCHAR mapping_7_to_28[MAX_PARAMETER_BANDS];
192 extern const UCHAR mapping_10_to_28[MAX_PARAMETER_BANDS];
193 extern const UCHAR mapping_14_to_28[MAX_PARAMETER_BANDS];
194 extern const UCHAR mapping_20_to_28[MAX_PARAMETER_BANDS];
195 extern const SCHAR kernels_4_to_64[MAX_HYBRID_BANDS];
196 extern const SCHAR kernels_5_to_64[MAX_HYBRID_BANDS];
197 extern const SCHAR kernels_7_to_64[MAX_HYBRID_BANDS];
198 extern const SCHAR kernels_9_to_64[MAX_HYBRID_BANDS];
199 extern const SCHAR kernels_12_to_64[MAX_HYBRID_BANDS];
200 extern const SCHAR kernels_15_to_64[MAX_HYBRID_BANDS];
201 extern const SCHAR kernels_23_to_64[MAX_HYBRID_BANDS];
202 
203 extern const UCHAR mapping_15_to_23[MAX_PARAMETER_BANDS_LD];
204 extern const UCHAR mapping_12_to_23[MAX_PARAMETER_BANDS_LD];
205 extern const UCHAR mapping_9_to_23[MAX_PARAMETER_BANDS_LD];
206 extern const UCHAR mapping_7_to_23[MAX_PARAMETER_BANDS_LD];
207 extern const UCHAR mapping_5_to_23[MAX_PARAMETER_BANDS_LD];
208 extern const UCHAR mapping_4_to_23[MAX_PARAMETER_BANDS_LD];
209 
210 extern const FIXP_CFG clipGainTable__FDK[];
211 extern const UCHAR clipGainSFTable__FDK[];
212 
213 extern const UCHAR pbStrideTable[];
214 extern const int smgTimeTable[];
215 
216 extern const FIXP_CFG envShapeDataTable__FDK[5][2];
217 extern const SCHAR row2channelGES[][MAX_M2_INPUT];
218 
219 /* sac_calcM1andM2 */
220 extern const SCHAR row2residual[][MAX_M2_INPUT];
221 
222 void SpatialDequantGetCLDValues(int index, FIXP_DBL* cu, FIXP_DBL* cl);
223 
224 void SpatialDequantGetCLD2Values(int index, FIXP_DBL* x);
225 
226 /* External helper functions */
SacGetHybridSubbands(int qmfSubbands)227 static inline int SacGetHybridSubbands(int qmfSubbands) {
228   return qmfSubbands - MAX_QMF_BANDS_TO_HYBRID + 10;
229 }
230 
231 #endif /* SAC_ROM_H */
232