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1 /* -----------------------------------------------------------------------------
2 Software License for The Fraunhofer FDK AAC Codec Library for Android
3 
4 © Copyright  1995 - 2018 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 /******************* Library for basic calculation routines ********************
96 
97    Author(s):   Omer Osman
98 
99    Description: SAC/SAOC Dec Noiseless Coding
100 
101 *******************************************************************************/
102 
103 #ifndef NLC_DEC_H
104 #define NLC_DEC_H
105 
106 #include "FDK_bitstream.h"
107 #include "huff_nodes.h"
108 #include "common_fix.h"
109 
110 typedef enum {
111 
112   SAC_DECODER,
113   SAOC_DECODER,
114   USAC_DECODER
115 
116 } DECODER_TYPE;
117 
118 typedef enum {
119   t_CLD,
120   t_ICC,
121   t_IPD,
122   t_OLD,
123   t_IOC,
124   t_NRG,
125   t_DCLD,
126   t_DMG,
127   t_PDG
128 
129 } DATA_TYPE;
130 
131 typedef enum {
132 
133   BACKWARDS = 0x0,
134   FORWARDS = 0x1
135 
136 } DIRECTION;
137 
138 typedef enum {
139 
140   DIFF_FREQ = 0x0,
141   DIFF_TIME = 0x1
142 
143 } DIFF_TYPE;
144 
145 typedef enum {
146 
147   HUFF_1D = 0x0,
148   HUFF_2D = 0x1
149 
150 } CODING_SCHEME;
151 
152 typedef enum {
153 
154   FREQ_PAIR = 0x0,
155   TIME_PAIR = 0x1
156 
157 } PAIRING;
158 
159 #ifndef HUFFDEC_PARAMS
160 #define HUFFDEC_PARMS
161 
162 #define PAIR_SHIFT 4
163 #define PAIR_MASK 0xf
164 
165 #define MAX_ENTRIES 168
166 #define HANDLE_HUFF_NODE const SHORT(*)[MAX_ENTRIES][2]
167 
168 #endif /* HUFFDECPARAMS */
169 
170 #define HUFFDEC_OK 0
171 #define HUFFDEC_NOTOK (-1)
172 
173 typedef int ERROR_t;
174 
175 ERROR_t EcDataPairDec(DECODER_TYPE DECODER, HANDLE_FDK_BITSTREAM strm,
176                       SCHAR *aaOutData1, SCHAR *aaOutData2, SCHAR *aHistory,
177                       DATA_TYPE data_type, int startBand, int dataBands,
178                       int pair_flag, int coarse_flag,
179                       int allowDiffTimeBack_flag);
180 
181 /* needed for GES- & STP-tool */
182 ERROR_t huff_dec_reshape(HANDLE_FDK_BITSTREAM strm, int *out_data, int num_val);
183 
184 extern ERROR_t sym_restoreIPD(HANDLE_FDK_BITSTREAM strm, int lav,
185                               SCHAR data[2]);
186 
187 #endif
188