invf_est.h revision 4f0d97057c5c640b25518358886f8c47da9fc052 
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/*!
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
96typedef 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
110typedef 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
130typedef 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}
149SBR_INV_FILT_EST;
150
151typedef SBR_INV_FILT_EST *HANDLE_SBR_INV_FILT_EST;
152
153void
154FDKsbrEnc_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
163INT
164FDKsbrEnc_initInvFiltDetector (HANDLE_SBR_INV_FILT_EST hInvFilt,
165                       INT* freqBandTableDetector,
166                       INT numDetectorBands,
167                       UINT useSpeechConfig);
168
169INT
170FDKsbrEnc_resetInvFiltDetector(HANDLE_SBR_INV_FILT_EST hInvFilt,
171                     INT* freqBandTableDetector,
172                     INT numDetectorBands);
173
174#endif /* _QMF_INV_FILT_H */
175
176