1
2/* -----------------------------------------------------------------------------------------------------------
3Software License for The Fraunhofer FDK AAC Codec Library for Android
4
5� Copyright  1995 - 2015 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  Sbr decoder
87*/
88#ifndef __SBR_DEC_H
89#define __SBR_DEC_H
90
91#include "sbrdecoder.h"
92
93#include "lpp_tran.h"
94#include "qmf.h"
95#include "env_calc.h"
96#include "FDK_audio.h"
97
98
99#include "sbrdec_drc.h"
100
101#define SACDEC_ALIGNMENT_FIX
102
103typedef struct
104{
105  QMF_FILTER_BANK     AnalysiscQMF;
106  QMF_FILTER_BANK     SynthesisQMF;
107
108  SBR_CALCULATE_ENVELOPE  SbrCalculateEnvelope;
109  SBR_LPP_TRANS           LppTrans;
110
111  QMF_SCALE_FACTOR sbrScaleFactor;
112  QMF_SCALE_FACTOR sbrScaleFactorRight;
113
114  /*! Delayed spectral data needed for the dynamic framing of SBR. Not required in case of CLDFB */
115  FIXP_DBL * pSbrOverlapBuffer;
116
117  /* References to workbuffers */
118  FIXP_DBL * WorkBuffer1;
119  FIXP_DBL * WorkBuffer2;
120
121  /* Delayed time input signal needed to align CLDFD with LD-MPS QMF. */
122  INT_PCM    coreDelayBuf[(96)];
123
124  /* QMF filter states */
125  FIXP_QAS   anaQmfStates[(320)];
126  FIXP_QSS * pSynQmfStates;
127
128  /* Reference pointer arrays for QMF time slots,
129     mixed among overlap and current slots. */
130  FIXP_DBL * QmfBufferReal[(((1024)/(32))+(6))];
131  FIXP_DBL * QmfBufferImag[(((1024)/(32))+(6))];
132  int useLP;
133
134  /* QMF domain extension time slot reference pointer array */
135
136  SBRDEC_DRC_CHANNEL  sbrDrcChannel;
137
138} SBR_DEC;
139
140typedef SBR_DEC *HANDLE_SBR_DEC;
141
142
143typedef struct
144{
145  SBR_FRAME_DATA      frameData[(1)+1];
146  SBR_PREV_FRAME_DATA prevFrameData;
147  SBR_DEC SbrDec;
148}
149SBR_CHANNEL;
150
151typedef SBR_CHANNEL *HANDLE_SBR_CHANNEL;
152
153void
154SbrDecodeAndProcess (HANDLE_SBR_DEC hSbrDec,
155                     INT_PCM *timeIn,
156                     HANDLE_SBR_HEADER_DATA hHeaderData,
157                     HANDLE_SBR_FRAME_DATA hFrameData,
158                     HANDLE_SBR_PREV_FRAME_DATA hPrevFrameData,
159                     int applyProcessing,
160                     int channelNr
161                     , UCHAR useLP
162                     );
163
164
165void
166SbrConstructTimeOutput (HANDLE_SBR_DEC hSbrDec,            /*!< handle to Decoder channel */
167                        INT_PCM *timeOut,                    /*!< pointer to output time signal */
168                        HANDLE_SBR_HEADER_DATA hHeaderData,/*!< Static control data */
169                        HANDLE_SBR_PREV_FRAME_DATA hPrevFrameData,  /*!< Some control data of last frame */
170                        int channelNr
171                       ,UCHAR useLP
172                        );
173
174
175void
176sbr_dec (HANDLE_SBR_DEC hSbrDec,            /*!< handle to Decoder channel */
177         INT_PCM *timeIn,                   /*!< pointer to input time signal */
178         INT_PCM *timeOut,                  /*!< pointer to output time signal */
179         HANDLE_SBR_DEC hSbrDecRight,       /*!< handle to Decoder channel right */
180         INT_PCM *timeOutRight,             /*!< pointer to output time signal */
181         const int strideIn,                /*!< Time data traversal strideIn */
182         const int strideOut,               /*!< Time data traversal strideOut */
183         HANDLE_SBR_HEADER_DATA hHeaderData,/*!< Static control data */
184         HANDLE_SBR_FRAME_DATA hFrameData,  /*!< Control data of current frame */
185         HANDLE_SBR_PREV_FRAME_DATA hPrevFrameData,  /*!< Some control data of last frame */
186         const int applyProcessing,         /*!< Flag for SBR operation */
187         HANDLE_PS_DEC h_ps_d,
188         const UINT flags,
189         const int codecFrameSize
190        );
191
192
193
194SBR_ERROR
195createSbrDec (SBR_CHANNEL * hSbrChannel,
196              HANDLE_SBR_HEADER_DATA hHeaderData,
197              TRANSPOSER_SETTINGS *pSettings,
198              const int downsampleFac,
199              const UINT qmfFlags,
200              const UINT flags,
201              const int overlap,
202              int chan);
203
204int
205deleteSbrDec (SBR_CHANNEL * hSbrChannel);
206
207SBR_ERROR
208resetSbrDec (HANDLE_SBR_DEC hSbrDec,
209             HANDLE_SBR_HEADER_DATA hHeaderData,
210             HANDLE_SBR_PREV_FRAME_DATA hPrevFrameData,
211             const int useLP,
212             const int downsampleFac);
213
214#endif
215