/src/aac/libAACenc/src/interface.h
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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: Interface psychoaccoustic/quantizer |
100 | | |
101 | | *******************************************************************************/ |
102 | | |
103 | | #ifndef INTERFACE_H |
104 | | #define INTERFACE_H |
105 | | |
106 | | #include "common_fix.h" |
107 | | #include "FDK_audio.h" |
108 | | |
109 | | #include "psy_data.h" |
110 | | #include "aacenc_tns.h" |
111 | | |
112 | | enum { MS_NONE = 0, MS_SOME = 1, MS_ALL = 2 }; |
113 | | |
114 | | enum { MS_ON = 1 }; |
115 | | |
116 | | struct TOOLSINFO { |
117 | | INT msDigest; /* 0 = no MS; 1 = some MS, 2 = all MS */ |
118 | | INT msMask[MAX_GROUPED_SFB]; |
119 | | }; |
120 | | |
121 | | typedef struct { |
122 | | INT sfbCnt; |
123 | | INT sfbPerGroup; |
124 | | INT maxSfbPerGroup; |
125 | | INT lastWindowSequence; |
126 | | INT windowShape; |
127 | | INT groupingMask; |
128 | | INT sfbOffsets[MAX_GROUPED_SFB + 1]; |
129 | | |
130 | | INT mdctScale; /* number of transform shifts */ |
131 | | INT groupLen[MAX_NO_OF_GROUPS]; |
132 | | |
133 | | TNS_INFO tnsInfo; |
134 | | INT noiseNrg[MAX_GROUPED_SFB]; |
135 | | INT isBook[MAX_GROUPED_SFB]; |
136 | | INT isScale[MAX_GROUPED_SFB]; |
137 | | |
138 | | /* memory located in QC_OUT_CHANNEL */ |
139 | | FIXP_DBL *mdctSpectrum; |
140 | | FIXP_DBL *sfbEnergy; |
141 | | FIXP_DBL *sfbSpreadEnergy; |
142 | | FIXP_DBL *sfbThresholdLdData; |
143 | | FIXP_DBL *sfbMinSnrLdData; |
144 | | FIXP_DBL *sfbEnergyLdData; |
145 | | |
146 | | } PSY_OUT_CHANNEL; |
147 | | |
148 | | typedef struct { |
149 | | /* information specific to each channel */ |
150 | | PSY_OUT_CHANNEL *psyOutChannel[(2)]; |
151 | | |
152 | | /* information shared by both channels */ |
153 | | INT commonWindow; |
154 | | struct TOOLSINFO toolsInfo; |
155 | | |
156 | | } PSY_OUT_ELEMENT; |
157 | | |
158 | | typedef struct { |
159 | | PSY_OUT_ELEMENT *psyOutElement[((8))]; |
160 | | PSY_OUT_CHANNEL *pPsyOutChannels[(8)]; |
161 | | |
162 | | } PSY_OUT; |
163 | | |
164 | 0 | inline int isLowDelay(AUDIO_OBJECT_TYPE aot) { |
165 | 0 | return (aot == AOT_ER_AAC_LD || aot == AOT_ER_AAC_ELD); |
166 | 0 | } |
167 | | |
168 | | #endif /* INTERFACE_H */ |