1/* -----------------------------------------------------------------------------
2Software License for The Fraunhofer FDK AAC Codec Library for Android
3
4© Copyright  1995 - 2018 Fraunhofer-Gesellschaft zur Förderung der angewandten
5Forschung e.V. All rights reserved.
6
7 1.    INTRODUCTION
8The Fraunhofer FDK AAC Codec Library for Android ("FDK AAC Codec") is software
9that implements the MPEG Advanced Audio Coding ("AAC") encoding and decoding
10scheme for digital audio. This FDK AAC Codec software is intended to be used on
11a wide variety of Android devices.
12
13AAC's HE-AAC and HE-AAC v2 versions are regarded as today's most efficient
14general perceptual audio codecs. AAC-ELD is considered the best-performing
15full-bandwidth communications codec by independent studies and is widely
16deployed. AAC has been standardized by ISO and IEC as part of the MPEG
17specifications.
18
19Patent licenses for necessary patent claims for the FDK AAC Codec (including
20those of Fraunhofer) may be obtained through Via Licensing
21(www.vialicensing.com) or through the respective patent owners individually for
22the purpose of encoding or decoding bit streams in products that are compliant
23with the ISO/IEC MPEG audio standards. Please note that most manufacturers of
24Android devices already license these patent claims through Via Licensing or
25directly from the patent owners, and therefore FDK AAC Codec software may
26already be covered under those patent licenses when it is used for those
27licensed purposes only.
28
29Commercially-licensed AAC software libraries, including floating-point versions
30with enhanced sound quality, are also available from Fraunhofer. Users are
31encouraged to check the Fraunhofer website for additional applications
32information and documentation.
33
342.    COPYRIGHT LICENSE
35
36Redistribution and use in source and binary forms, with or without modification,
37are permitted without payment of copyright license fees provided that you
38satisfy the following conditions:
39
40You must retain the complete text of this software license in redistributions of
41the FDK AAC Codec or your modifications thereto in source code form.
42
43You must retain the complete text of this software license in the documentation
44and/or other materials provided with redistributions of the FDK AAC Codec or
45your modifications thereto in binary form. You must make available free of
46charge copies of the complete source code of the FDK AAC Codec and your
47modifications thereto to recipients of copies in binary form.
48
49The name of Fraunhofer may not be used to endorse or promote products derived
50from this library without prior written permission.
51
52You may not charge copyright license fees for anyone to use, copy or distribute
53the FDK AAC Codec software or your modifications thereto.
54
55Your modified versions of the FDK AAC Codec must carry prominent notices stating
56that you changed the software and the date of any change. For modified versions
57of the FDK AAC Codec, the term "Fraunhofer FDK AAC Codec Library for Android"
58must be replaced by the term "Third-Party Modified Version of the Fraunhofer FDK
59AAC Codec Library for Android."
60
613.    NO PATENT LICENSE
62
63NO EXPRESS OR IMPLIED LICENSES TO ANY PATENT CLAIMS, including without
64limitation the patents of Fraunhofer, ARE GRANTED BY THIS SOFTWARE LICENSE.
65Fraunhofer provides no warranty of patent non-infringement with respect to this
66software.
67
68You may use this FDK AAC Codec software or modifications thereto only for
69purposes that are authorized by appropriate patent licenses.
70
714.    DISCLAIMER
72
73This FDK AAC Codec software is provided by Fraunhofer on behalf of the copyright
74holders and contributors "AS IS" and WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES,
75including but not limited to the implied warranties of merchantability and
76fitness for a particular purpose. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
77CONTRIBUTORS BE LIABLE for any direct, indirect, incidental, special, exemplary,
78or consequential damages, including but not limited to procurement of substitute
79goods or services; loss of use, data, or profits, or business interruption,
80however caused and on any theory of liability, whether in contract, strict
81liability, or tort (including negligence), arising in any way out of the use of
82this software, even if advised of the possibility of such damage.
83
845.    CONTACT INFORMATION
85
86Fraunhofer Institute for Integrated Circuits IIS
87Attention: Audio and Multimedia Departments - FDK AAC LL
88Am Wolfsmantel 33
8991058 Erlangen, Germany
90
91www.iis.fraunhofer.de/amm
92amm-info@iis.fraunhofer.de
93----------------------------------------------------------------------------- */
94
95/**************************** AAC decoder library ******************************
96
97   Author(s):   Josef Hoepfl
98
99   Description: Definition of constant tables
100
101*******************************************************************************/
102
103#ifndef AAC_ROM_H
104#define AAC_ROM_H
105
106#include "common_fix.h"
107#include "FDK_audio.h"
108#include "aacdec_hcr_types.h"
109#include "aacdec_hcrs.h"
110
111#define PCM_DEC FIXP_DBL
112#define MAXVAL_PCM_DEC MAXVAL_DBL
113#define MINVAL_PCM_DEC MINVAL_DBL
114#define FIXP_DBL2PCM_DEC(x) (x)
115#define PCM_DEC2FIXP_DBL(x) (x)
116#define PCM_DEC_BITS DFRACT_BITS
117#define PCM_DEC2FX_PCM(x) FX_DBL2FX_PCM(x)
118#define FX_PCM2PCM_DEC(x) FX_PCM2FX_DBL(x)
119
120#define AACDEC_MAX_CH_CONF 14
121#define AACDEC_CH_ELEMENTS_TAB_SIZE 7 /*!< Size of element tables */
122
123#define AAC_NF_NO_RANDOM_VAL \
124  512 /*!< Size of random number array for noise floor */
125
126#define INV_QUANT_TABLESIZE 256
127
128extern const FIXP_DBL InverseQuantTable[INV_QUANT_TABLESIZE + 1];
129extern const FIXP_DBL MantissaTable[4][14];
130extern const SCHAR ExponentTable[4][14];
131
132#define NUM_LD_COEF_512 1536
133#define NUM_LD_COEF_480 1440
134/* Window table partition exponents. */
135#define WTS0 (1)
136#define WTS1 (0)
137#define WTS2 (-2)
138extern const FIXP_WTB LowDelaySynthesis512[1536];
139extern const FIXP_WTB LowDelaySynthesis480[1440];
140extern const FIXP_WTB LowDelaySynthesis256[768];
141extern const FIXP_WTB LowDelaySynthesis240[720];
142extern const FIXP_WTB LowDelaySynthesis160[480];
143extern const FIXP_WTB LowDelaySynthesis128[384];
144extern const FIXP_WTB LowDelaySynthesis120[360];
145
146typedef struct {
147  const SHORT *sfbOffsetLong;
148  const SHORT *sfbOffsetShort;
149  UCHAR numberOfSfbLong;
150  UCHAR numberOfSfbShort;
151} SFB_INFO;
152
153extern const SFB_INFO sfbOffsetTables[5][16];
154
155/* Huffman tables */
156enum { HuffmanBits = 2, HuffmanEntries = (1 << HuffmanBits) };
157
158typedef struct {
159  const USHORT (*CodeBook)[HuffmanEntries];
160  UCHAR Dimension;
161  UCHAR numBits;
162  UCHAR Offset;
163} CodeBookDescription;
164
165extern const CodeBookDescription AACcodeBookDescriptionTable[13];
166extern const CodeBookDescription AACcodeBookDescriptionSCL;
167
168extern const STATEFUNC aStateConstant2State[];
169
170extern const SCHAR aCodebook2StartInt[];
171
172extern const UCHAR aMinOfCbPair[];
173extern const UCHAR aMaxOfCbPair[];
174
175extern const UCHAR aMaxCwLen[];
176extern const UCHAR aDimCb[];
177extern const UCHAR aDimCbShift[];
178extern const UCHAR aSignCb[];
179extern const UCHAR aCbPriority[];
180
181extern const UINT *aHuffTable[];
182extern const SCHAR *aQuantTable[];
183
184extern const USHORT aLargestAbsoluteValue[];
185
186extern const UINT aHuffTreeRvlcEscape[];
187extern const UINT aHuffTreeRvlCodewds[];
188
189extern const UCHAR tns_max_bands_tbl[13][2];
190
191extern const UCHAR tns_max_bands_tbl_480[13];
192extern const UCHAR tns_max_bands_tbl_512[13];
193
194#define FIXP_TCC FIXP_DBL
195
196extern const FIXP_TCC FDKaacDec_tnsCoeff3[8];
197extern const FIXP_TCC FDKaacDec_tnsCoeff4[16];
198
199extern const UCHAR FDKaacDec_tnsCoeff3_gain_ld[];
200extern const UCHAR FDKaacDec_tnsCoeff4_gain_ld[];
201
202extern const USHORT AacDec_randomSign[AAC_NF_NO_RANDOM_VAL / 16];
203
204extern const FIXP_DBL pow2_div24minus1[47];
205extern const int offsetTab[2][16];
206
207/* Channel mapping indices for time domain I/O.
208   The first dimension is the channel configuration index. */
209extern const UCHAR channelMappingTablePassthrough[15][8];
210extern const UCHAR channelMappingTableWAV[15][8];
211
212/* Lookup tables for elements in ER bitstream */
213extern const MP4_ELEMENT_ID elementsTab[AACDEC_MAX_CH_CONF]
214                                       [AACDEC_CH_ELEMENTS_TAB_SIZE];
215
216#define SF_FNA_COEFFS \
217  1 /* Compile-time prescaler for MDST-filter coefficients. */
218/* SF_FNA_COEFFS > 0 should only be considered for FIXP_DBL-coefficients  */
219/* (i.e. if CPLX_PRED_FILTER_16BIT is not defined).                       */
220/* With FIXP_DBL loss of precision is possible for SF_FNA_COEFFS > 11.    */
221
222#ifdef CPLX_PRED_FILTER_16BIT
223#define FIXP_FILT FIXP_SGL
224#define FILT(a) ((FL2FXCONST_SGL(a)) >> SF_FNA_COEFFS)
225#else
226#define FIXP_FILT FIXP_DBL
227#define FILT(a) ((FL2FXCONST_DBL(a)) >> SF_FNA_COEFFS)
228#endif
229
230extern const FIXP_FILT mdst_filt_coef_curr[20][3]; /* MDST-filter coefficient
231                                                      tables used for current
232                                                      window  */
233extern const FIXP_FILT mdst_filt_coef_prev[6][4];  /* MDST-filter coefficient
234                                                      tables used for previous
235                                                      window */
236
237#endif /* #ifndef AAC_ROM_H */
238