1
2/* -----------------------------------------------------------------------------------------------------------
3Software License for The Fraunhofer FDK AAC Codec Library for Android
4
5� Copyright  1995 - 2013 Fraunhofer-Gesellschaft zur F�rderung der angewandten Forschung e.V.
6  All rights reserved.
7
8 1.    INTRODUCTION
9The Fraunhofer FDK AAC Codec Library for Android ("FDK AAC Codec") is software that implements
10the MPEG Advanced Audio Coding ("AAC") encoding and decoding scheme for digital audio.
11This FDK AAC Codec software is intended to be used on a wide variety of Android devices.
12
13AAC's HE-AAC and HE-AAC v2 versions are regarded as today's most efficient general perceptual
14audio codecs. AAC-ELD is considered the best-performing full-bandwidth communications codec by
15independent studies and is widely deployed. AAC has been standardized by ISO and IEC as part
16of the MPEG specifications.
17
18Patent licenses for necessary patent claims for the FDK AAC Codec (including those of Fraunhofer)
19may be obtained through Via Licensing (www.vialicensing.com) or through the respective patent owners
20individually for the purpose of encoding or decoding bit streams in products that are compliant with
21the ISO/IEC MPEG audio standards. Please note that most manufacturers of Android devices already license
22these patent claims through Via Licensing or directly from the patent owners, and therefore FDK AAC Codec
23software may already be covered under those patent licenses when it is used for those licensed purposes only.
24
25Commercially-licensed AAC software libraries, including floating-point versions with enhanced sound quality,
26are also available from Fraunhofer. Users are encouraged to check the Fraunhofer website for additional
27applications information and documentation.
28
292.    COPYRIGHT LICENSE
30
31Redistribution and use in source and binary forms, with or without modification, are permitted without
32payment of copyright license fees provided that you satisfy the following conditions:
33
34You must retain the complete text of this software license in redistributions of the FDK AAC Codec or
35your modifications thereto in source code form.
36
37You must retain the complete text of this software license in the documentation and/or other materials
38provided with redistributions of the FDK AAC Codec or your modifications thereto in binary form.
39You must make available free of charge copies of the complete source code of the FDK AAC Codec and your
40modifications thereto to recipients of copies in binary form.
41
42The name of Fraunhofer may not be used to endorse or promote products derived from this library without
43prior written permission.
44
45You may not charge copyright license fees for anyone to use, copy or distribute the FDK AAC Codec
46software or your modifications thereto.
47
48Your modified versions of the FDK AAC Codec must carry prominent notices stating that you changed the software
49and the date of any change. For modified versions of the FDK AAC Codec, the term
50"Fraunhofer FDK AAC Codec Library for Android" must be replaced by the term
51"Third-Party Modified Version of the Fraunhofer FDK AAC Codec Library for Android."
52
533.    NO PATENT LICENSE
54
55NO EXPRESS OR IMPLIED LICENSES TO ANY PATENT CLAIMS, including without limitation the patents of Fraunhofer,
56ARE GRANTED BY THIS SOFTWARE LICENSE. Fraunhofer provides no warranty of patent non-infringement with
57respect to this software.
58
59You may use this FDK AAC Codec software or modifications thereto only for purposes that are authorized
60by appropriate patent licenses.
61
624.    DISCLAIMER
63
64This FDK AAC Codec software is provided by Fraunhofer on behalf of the copyright holders and contributors
65"AS IS" and WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES, including but not limited to the implied warranties
66of merchantability and fitness for a particular purpose. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
67CONTRIBUTORS BE LIABLE for any direct, indirect, incidental, special, exemplary, or consequential damages,
68including but not limited to procurement of substitute goods or services; loss of use, data, or profits,
69or business interruption, however caused and on any theory of liability, whether in contract, strict
70liability, or tort (including negligence), arising in any way out of the use of this software, even if
71advised of the possibility of such damage.
72
735.    CONTACT INFORMATION
74
75Fraunhofer Institute for Integrated Circuits IIS
76Attention: Audio and Multimedia Departments - FDK AAC LL
77Am Wolfsmantel 33
7891058 Erlangen, Germany
79
80www.iis.fraunhofer.de/amm
81amm-info@iis.fraunhofer.de
82----------------------------------------------------------------------------------------------------------- */
83
84/*****************************  MPEG-4 AAC Decoder  **************************
85
86   Author(s):   Christian Griebel
87   Description: Error concealment structs and types
88
89******************************************************************************/
90
91#ifndef CONCEAL_TYPES_H
92#define CONCEAL_TYPES_H
93
94
95
96#include "machine_type.h"
97#include "common_fix.h"
98
99#include "rvlc_info.h"
100
101
102#define CONCEAL_MAX_NUM_FADE_FACTORS      ( 16 )
103
104 #define FIXP_CNCL        FIXP_DBL
105 #define FL2FXCONST_CNCL  FL2FXCONST_DBL
106 #define FX_DBL2FX_CNCL
107 #define FX_CNCL2FX_DBL
108 #define CNCL_FRACT_BITS  DFRACT_BITS
109
110/* Warning: Do not ever change these values. */
111typedef enum
112{
113  ConcealMethodNone  = -1,
114  ConcealMethodMute  =  0,
115  ConcealMethodNoise =  1,
116  ConcealMethodInter =  2,
117  ConcealMethodTonal =  3
118
119} CConcealmentMethod;
120
121
122typedef enum
123{
124  ConcealState_Ok,
125  ConcealState_Single,
126  ConcealState_FadeIn,
127  ConcealState_Mute,
128  ConcealState_FadeOut
129
130} CConcealmentState;
131
132
133typedef struct
134{
135  FIXP_SGL  fadeOutFactor[CONCEAL_MAX_NUM_FADE_FACTORS];
136  FIXP_SGL  fadeInFactor [CONCEAL_MAX_NUM_FADE_FACTORS];
137
138  CConcealmentMethod  method;
139
140  int  numFadeOutFrames;
141  int  numFadeInFrames;
142  int  numMuteReleaseFrames;
143  int  comfortNoiseLevel;
144
145} CConcealParams;
146
147
148
149typedef struct
150{
151  CConcealParams *pConcealParams;
152
153  FIXP_CNCL spectralCoefficient[1024];
154  SHORT     specScale[8];
155
156  INT    iRandomPhase;
157  INT    prevFrameOk[2];
158  INT    cntFadeFrames;
159  INT    cntValidFrames;
160
161  SHORT aRvlcPreviousScaleFactor[RVLC_MAX_SFB];  /* needed once per channel */
162  UCHAR aRvlcPreviousCodebook[RVLC_MAX_SFB];     /* needed once per channel */
163  SCHAR rvlcPreviousScaleFactorOK;
164  SCHAR rvlcPreviousBlockType;
165
166
167  SCHAR  lastRenderMode;
168
169  UCHAR  windowShape;
170  UCHAR  windowSequence;
171  UCHAR  lastWinGrpLen;
172
173  CConcealmentState concealState;
174
175} CConcealmentInfo;
176
177
178#endif /* #ifndef CONCEAL_TYPES_H */
179