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: Global psychoaccoustic constants
100 
101 *******************************************************************************/
102 
103 #ifndef PSY_CONST_H
104 #define PSY_CONST_H
105 
106 #define TRUE 1
107 #define FALSE 0
108 
109 #define TRANS_FAC 8 /* encoder short long ratio */
110 
111 #define FRAME_MAXLEN_SHORT ((1024) / TRANS_FAC)
112 #define FRAME_LEN_SHORT_128 ((1024) / TRANS_FAC)
113 #define FRAME_LEN_SHORT_120 (FRAME_LEN_LONG_960 / TRANS_FAC)
114 
115 /* Filterbank type*/
116 enum FB_TYPE { FB_LC = 0, FB_LD = 1, FB_ELD = 2 };
117 
118 /* Block types */
119 #define N_BLOCKTYPES 6
120 enum {
121   LONG_WINDOW = 0,
122   START_WINDOW,
123   SHORT_WINDOW,
124   STOP_WINDOW,
125   _LOWOV_WINDOW, /* Do not use this block type out side of block_switch.cpp */
126   WRONG_WINDOW
127 };
128 
129 /* Window shapes */
130 enum {
131   SINE_WINDOW = 0,
132   KBD_WINDOW = 1,
133   LOL_WINDOW = 2 /* Low OverLap window shape for AAC-LD */
134 };
135 
136 /*
137   MS stuff
138 */
139 enum { SI_MS_MASK_NONE = 0, SI_MS_MASK_SOME = 1, SI_MS_MASK_ALL = 2 };
140 
141 #define MAX_NO_OF_GROUPS 4
142 #define MAX_SFB_LONG                                                      \
143   51 /* 51 for a memory optimized implementation, maybe 64 for convenient \
144         debugging */
145 #define MAX_SFB_SHORT                                                     \
146   15 /* 15 for a memory optimized implementation, maybe 16 for convenient \
147         debugging */
148 
149 #define MAX_SFB \
150   (MAX_SFB_SHORT > MAX_SFB_LONG ? MAX_SFB_SHORT : MAX_SFB_LONG) /* = 51 */
151 #define MAX_GROUPED_SFB                            \
152   (MAX_NO_OF_GROUPS * MAX_SFB_SHORT > MAX_SFB_LONG \
153        ? MAX_NO_OF_GROUPS * MAX_SFB_SHORT          \
154        : MAX_SFB_LONG) /* = 60 */
155 
156 #define MAX_INPUT_BUFFER_SIZE (2 * (1024)) /* 2048 */
157 
158 #define PCM_LEVEL 1.0f
159 #define NORM_PCM (PCM_LEVEL / 32768.0f)
160 #define NORM_PCM_ENERGY (NORM_PCM * NORM_PCM)
161 #define LOG_NORM_PCM -15
162 
163 #define TNS_PREDGAIN_SCALE (1000)
164 
165 #define LFE_LOWPASS_LINE 12
166 #define LFE_LOWPASS_LINE_MIN 4
167 
168 #endif /* PSY_CONST_H */
169