1 
2 /* -----------------------------------------------------------------------------------------------------------
3 Software 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
9 The Fraunhofer FDK AAC Codec Library for Android ("FDK AAC Codec") is software that implements
10 the MPEG Advanced Audio Coding ("AAC") encoding and decoding scheme for digital audio.
11 This FDK AAC Codec software is intended to be used on a wide variety of Android devices.
12 
13 AAC's HE-AAC and HE-AAC v2 versions are regarded as today's most efficient general perceptual
14 audio codecs. AAC-ELD is considered the best-performing full-bandwidth communications codec by
15 independent studies and is widely deployed. AAC has been standardized by ISO and IEC as part
16 of the MPEG specifications.
17 
18 Patent licenses for necessary patent claims for the FDK AAC Codec (including those of Fraunhofer)
19 may be obtained through Via Licensing (www.vialicensing.com) or through the respective patent owners
20 individually for the purpose of encoding or decoding bit streams in products that are compliant with
21 the ISO/IEC MPEG audio standards. Please note that most manufacturers of Android devices already license
22 these patent claims through Via Licensing or directly from the patent owners, and therefore FDK AAC Codec
23 software may already be covered under those patent licenses when it is used for those licensed purposes only.
24 
25 Commercially-licensed AAC software libraries, including floating-point versions with enhanced sound quality,
26 are also available from Fraunhofer. Users are encouraged to check the Fraunhofer website for additional
27 applications information and documentation.
28 
29 2.    COPYRIGHT LICENSE
30 
31 Redistribution and use in source and binary forms, with or without modification, are permitted without
32 payment of copyright license fees provided that you satisfy the following conditions:
33 
34 You must retain the complete text of this software license in redistributions of the FDK AAC Codec or
35 your modifications thereto in source code form.
36 
37 You must retain the complete text of this software license in the documentation and/or other materials
38 provided with redistributions of the FDK AAC Codec or your modifications thereto in binary form.
39 You must make available free of charge copies of the complete source code of the FDK AAC Codec and your
40 modifications thereto to recipients of copies in binary form.
41 
42 The name of Fraunhofer may not be used to endorse or promote products derived from this library without
43 prior written permission.
44 
45 You may not charge copyright license fees for anyone to use, copy or distribute the FDK AAC Codec
46 software or your modifications thereto.
47 
48 Your modified versions of the FDK AAC Codec must carry prominent notices stating that you changed the software
49 and 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 
53 3.    NO PATENT LICENSE
54 
55 NO EXPRESS OR IMPLIED LICENSES TO ANY PATENT CLAIMS, including without limitation the patents of Fraunhofer,
56 ARE GRANTED BY THIS SOFTWARE LICENSE. Fraunhofer provides no warranty of patent non-infringement with
57 respect to this software.
58 
59 You may use this FDK AAC Codec software or modifications thereto only for purposes that are authorized
60 by appropriate patent licenses.
61 
62 4.    DISCLAIMER
63 
64 This 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
66 of merchantability and fitness for a particular purpose. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
67 CONTRIBUTORS BE LIABLE for any direct, indirect, incidental, special, exemplary, or consequential damages,
68 including but not limited to procurement of substitute goods or services; loss of use, data, or profits,
69 or business interruption, however caused and on any theory of liability, whether in contract, strict
70 liability, or tort (including negligence), arising in any way out of the use of this software, even if
71 advised of the possibility of such damage.
72 
73 5.    CONTACT INFORMATION
74 
75 Fraunhofer Institute for Integrated Circuits IIS
76 Attention: Audio and Multimedia Departments - FDK AAC LL
77 Am Wolfsmantel 33
78 91058 Erlangen, Germany
79 
80 www.iis.fraunhofer.de/amm
81 amm-info@iis.fraunhofer.de
82 ----------------------------------------------------------------------------------------------------------- */
83 
84 /*!
85   \file
86   \brief  Inverse Filtering detection prototypes
87 */
88 #ifndef _INV_FILT_DET_H
89 #define _INV_FILT_DET_H
90 
91 #include "sbr_encoder.h"
92 #include "sbr_def.h"
93 
94 #define INVF_SMOOTHING_LENGTH 2
95 
96 typedef struct
97 {
98   const FIXP_DBL *quantStepsSbr;
99   const FIXP_DBL *quantStepsOrig;
100   const FIXP_DBL *nrgBorders;
101   INT   numRegionsSbr;
102   INT   numRegionsOrig;
103   INT   numRegionsNrg;
104   INVF_MODE regionSpace[5][5];
105   INVF_MODE regionSpaceTransient[5][5];
106   INT EnergyCompFactor[5];
107 
108 }DETECTOR_PARAMETERS;
109 
110 typedef struct
111 {
112   FIXP_DBL  origQuotaMean[INVF_SMOOTHING_LENGTH+1];
113   FIXP_DBL  sbrQuotaMean[INVF_SMOOTHING_LENGTH+1];
114   FIXP_DBL  origQuotaMeanStrongest[INVF_SMOOTHING_LENGTH+1];
115   FIXP_DBL  sbrQuotaMeanStrongest[INVF_SMOOTHING_LENGTH+1];
116 
117   FIXP_DBL origQuotaMeanFilt;
118   FIXP_DBL sbrQuotaMeanFilt;
119   FIXP_DBL origQuotaMeanStrongestFilt;
120   FIXP_DBL sbrQuotaMeanStrongestFilt;
121 
122   FIXP_DBL origQuotaMax;
123   FIXP_DBL sbrQuotaMax;
124 
125   FIXP_DBL avgNrg;
126 }DETECTOR_VALUES;
127 
128 
129 
130 typedef struct
131 {
132   INT numberOfStrongest;
133 
134   INT prevRegionSbr[MAX_NUM_NOISE_VALUES];
135   INT prevRegionOrig[MAX_NUM_NOISE_VALUES];
136 
137   INT freqBandTableInvFilt[MAX_NUM_NOISE_VALUES];
138   INT noDetectorBands;
139   INT noDetectorBandsMax;
140 
141   const DETECTOR_PARAMETERS *detectorParams;
142 
143   INVF_MODE prevInvfMode[MAX_NUM_NOISE_VALUES];
144   DETECTOR_VALUES detectorValues[MAX_NUM_NOISE_VALUES];
145 
146   FIXP_DBL nrgAvg;
147   FIXP_DBL wmQmf[MAX_NUM_NOISE_VALUES];
148 }
149 SBR_INV_FILT_EST;
150 
151 typedef SBR_INV_FILT_EST *HANDLE_SBR_INV_FILT_EST;
152 
153 void
154 FDKsbrEnc_qmfInverseFilteringDetector(HANDLE_SBR_INV_FILT_EST hInvFilt,
155                             FIXP_DBL ** quotaMatrix,
156                             FIXP_DBL *nrgVector,
157                             SCHAR    *indexVector,
158                             INT startIndex,
159                             INT stopIndex,
160                             INT transientFlag,
161                             INVF_MODE* infVec);
162 
163 INT
164 FDKsbrEnc_initInvFiltDetector (HANDLE_SBR_INV_FILT_EST hInvFilt,
165                        INT* freqBandTableDetector,
166                        INT numDetectorBands,
167                        UINT useSpeechConfig);
168 
169 INT
170 FDKsbrEnc_resetInvFiltDetector(HANDLE_SBR_INV_FILT_EST hInvFilt,
171                      INT* freqBandTableDetector,
172                      INT numDetectorBands);
173 
174 #endif /* _QMF_INV_FILT_H */
175 
176