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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 /**************************** AAC encoder library ******************************
96 
97    Author(s):   M.Werner
98 
99    Description: Huffman Bitcounter & coder
100 
101 *******************************************************************************/
102 
103 #ifndef BIT_CNT_H
104 #define BIT_CNT_H
105 
106 #include "common_fix.h"
107 #include "FDK_bitstream.h"
108 #include "aacEnc_rom.h"
109 
110 #define INVALID_BITCOUNT (FDK_INT_MAX / 4)
111 
112 /*
113   code book number table
114 */
115 
116 enum codeBookNo {
117   CODE_BOOK_ZERO_NO = 0,
118   CODE_BOOK_1_NO = 1,
119   CODE_BOOK_2_NO = 2,
120   CODE_BOOK_3_NO = 3,
121   CODE_BOOK_4_NO = 4,
122   CODE_BOOK_5_NO = 5,
123   CODE_BOOK_6_NO = 6,
124   CODE_BOOK_7_NO = 7,
125   CODE_BOOK_8_NO = 8,
126   CODE_BOOK_9_NO = 9,
127   CODE_BOOK_10_NO = 10,
128   CODE_BOOK_ESC_NO = 11,
129   CODE_BOOK_RES_NO = 12,
130   CODE_BOOK_PNS_NO = 13,
131   CODE_BOOK_IS_OUT_OF_PHASE_NO = 14,
132   CODE_BOOK_IS_IN_PHASE_NO = 15
133 
134 };
135 
136 /*
137   code book index table
138 */
139 
140 enum codeBookNdx {
141   CODE_BOOK_ZERO_NDX,
142   CODE_BOOK_1_NDX,
143   CODE_BOOK_2_NDX,
144   CODE_BOOK_3_NDX,
145   CODE_BOOK_4_NDX,
146   CODE_BOOK_5_NDX,
147   CODE_BOOK_6_NDX,
148   CODE_BOOK_7_NDX,
149   CODE_BOOK_8_NDX,
150   CODE_BOOK_9_NDX,
151   CODE_BOOK_10_NDX,
152   CODE_BOOK_ESC_NDX,
153   CODE_BOOK_RES_NDX,
154   CODE_BOOK_PNS_NDX,
155   CODE_BOOK_IS_OUT_OF_PHASE_NDX,
156   CODE_BOOK_IS_IN_PHASE_NDX,
157   NUMBER_OF_CODE_BOOKS
158 };
159 
160 /*
161   code book lav table
162 */
163 
164 enum codeBookLav {
165   CODE_BOOK_ZERO_LAV = 0,
166   CODE_BOOK_1_LAV = 1,
167   CODE_BOOK_2_LAV = 1,
168   CODE_BOOK_3_LAV = 2,
169   CODE_BOOK_4_LAV = 2,
170   CODE_BOOK_5_LAV = 4,
171   CODE_BOOK_6_LAV = 4,
172   CODE_BOOK_7_LAV = 7,
173   CODE_BOOK_8_LAV = 7,
174   CODE_BOOK_9_LAV = 12,
175   CODE_BOOK_10_LAV = 12,
176   CODE_BOOK_ESC_LAV = 16,
177   CODE_BOOK_SCF_LAV = 60,
178   CODE_BOOK_PNS_LAV = 60
179 };
180 
181 INT FDKaacEnc_bitCount(const SHORT *aQuantSpectrum, const INT noOfSpecLines,
182                        INT maxVal, INT *bitCountLut);
183 
184 INT FDKaacEnc_countValues(SHORT *values, INT width, INT codeBook);
185 
186 INT FDKaacEnc_codeValues(SHORT *values, INT width, INT codeBook,
187                          HANDLE_FDK_BITSTREAM hBitstream);
188 
189 INT FDKaacEnc_codeScalefactorDelta(INT scalefactor,
190                                    HANDLE_FDK_BITSTREAM hBitstream);
191 
FDKaacEnc_bitCountScalefactorDelta(const INT delta)192 inline INT FDKaacEnc_bitCountScalefactorDelta(const INT delta) {
193   FDK_ASSERT((0 <= (delta + CODE_BOOK_SCF_LAV)) &&
194              ((delta + CODE_BOOK_SCF_LAV) <
195               (int)(sizeof(FDKaacEnc_huff_ltabscf) /
196                     sizeof((FDKaacEnc_huff_ltabscf[0])))));
197   return ((INT)FDKaacEnc_huff_ltabscf[delta + CODE_BOOK_SCF_LAV]);
198 }
199 
200 #endif
201