1
2/* -----------------------------------------------------------------------------------------------------------
3Software License for The Fraunhofer FDK AAC Codec Library for Android
4
5© Copyright  1995 - 2012 Fraunhofer-Gesellschaft zur Förderung 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 Audio Encoder  ***************************
85
86   Initial author:       M. Neuendorf, N. Rettelbach, M. Multrus
87   contents/description: PS Parameter extraction, encoding
88
89******************************************************************************/
90/*!
91  \file
92  \brief  PS parameter extraction, encoding functions
93*/
94
95#ifndef __INCLUDED_PS_ENCODE_H
96#define __INCLUDED_PS_ENCODE_H
97
98#include "ps_const.h"
99#include "ps_bitenc.h"
100
101
102#define IID_SCALE_FT      (64.f)    /* maxVal in Quant tab is +/- 50 */
103#define IID_SCALE         6         /* maxVal in Quant tab is +/- 50 */
104#define IID_MAXVAL        (1<<IID_SCALE)
105
106#define PS_QUANT_SCALE_FT (64.f)     /* error smaller (64-25)/64 * 20 bands * 4 env -> QuantScale 64 */
107#define PS_QUANT_SCALE    6          /* error smaller (64-25)/64 * 20 bands * 4 env -> QuantScale 6 bit */
108
109
110#define QMF_GROUPS_LO_RES      12
111#define SUBQMF_GROUPS_LO_RES   10
112#define QMF_GROUPS_HI_RES      18
113#define SUBQMF_GROUPS_HI_RES   30
114
115
116typedef struct T_PS_DATA {
117
118  INT iidEnable;
119  INT iidEnableLast;
120  INT iidQuantMode;
121  INT iidQuantModeLast;
122  INT iidDiffMode[PS_MAX_ENVELOPES];
123  INT iidIdx     [PS_MAX_ENVELOPES][PS_MAX_BANDS];
124  INT iidIdxLast [PS_MAX_BANDS];
125
126  INT iccEnable;
127  INT iccEnableLast;
128  INT iccQuantMode;
129  INT iccQuantModeLast;
130  INT iccDiffMode[PS_MAX_ENVELOPES];
131  INT iccIdx     [PS_MAX_ENVELOPES][PS_MAX_BANDS];
132  INT iccIdxLast [PS_MAX_BANDS];
133
134  INT nEnvelopesLast;
135
136  INT headerCnt;
137  INT iidTimeCnt;
138  INT iccTimeCnt;
139  INT noEnvCnt;
140
141} PS_DATA, *HANDLE_PS_DATA;
142
143
144typedef struct T_PS_ENCODE{
145
146  PS_DATA         psData;
147
148  PS_BANDS        psEncMode;
149  INT             nQmfIidGroups;
150  INT             nSubQmfIidGroups;
151  INT             iidGroupBorders[QMF_GROUPS_HI_RES + SUBQMF_GROUPS_HI_RES + 1];
152  INT             subband2parameterIndex[QMF_GROUPS_HI_RES + SUBQMF_GROUPS_HI_RES];
153  UCHAR           iidGroupWidthLd[QMF_GROUPS_HI_RES + SUBQMF_GROUPS_HI_RES];
154  FIXP_DBL        iidQuantErrorThreshold;
155
156  UCHAR           psBandNrgScale [PS_MAX_BANDS];
157
158} PS_ENCODE;
159
160
161typedef struct T_PS_ENCODE *HANDLE_PS_ENCODE;
162
163FDK_PSENC_ERROR FDKsbrEnc_CreatePSEncode(
164        HANDLE_PS_ENCODE         *phPsEncode
165        );
166
167FDK_PSENC_ERROR FDKsbrEnc_InitPSEncode(
168        HANDLE_PS_ENCODE          hPsEncode,
169        const PS_BANDS            psEncMode,
170        const FIXP_DBL            iidQuantErrorThreshold
171        );
172
173FDK_PSENC_ERROR FDKsbrEnc_DestroyPSEncode(
174        HANDLE_PS_ENCODE         *phPsEncode
175        );
176
177FDK_PSENC_ERROR FDKsbrEnc_PSEncode(
178        HANDLE_PS_ENCODE          hPsEncode,
179        HANDLE_PS_OUT             hPsOut,
180        UCHAR                    *dynBandScale,
181        UINT                      maxEnvelopes,
182        FIXP_DBL                 *hybridData[HYBRID_FRAMESIZE][MAX_PS_CHANNELS][2],
183        const INT                 frameSize,
184        const INT                 sendHeader
185        );
186
187#endif
188