2 /* -----------------------------------------------------------------------------------------------------------
3 Software License for The Fraunhofer FDK AAC Codec Library for Android
5 © Copyright 1995 - 2013 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.
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.
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.
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.
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.
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:
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.
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.
42 The name of Fraunhofer may not be used to endorse or promote products derived from this library without
43 prior written permission.
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.
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."
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.
59 You may use this FDK AAC Codec software or modifications thereto only for purposes that are authorized
60 by appropriate patent licenses.
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.
73 5. CONTACT INFORMATION
75 Fraunhofer Institute for Integrated Circuits IIS
76 Attention: Audio and Multimedia Departments - FDK AAC LL
78 91058 Erlangen, Germany
80 www.iis.fraunhofer.de/amm
81 amm-info@iis.fraunhofer.de
82 ----------------------------------------------------------------------------------------------------------- */
84 /***************************** MPEG Audio Encoder ***************************
86 Initial author: M. Neuendorf, N. Rettelbach, M. Multrus
87 contents/description: PS Parameter extraction, encoding
89 ******************************************************************************/
92 \brief PS parameter extraction, encoding functions
95 #ifndef __INCLUDED_PS_ENCODE_H
96 #define __INCLUDED_PS_ENCODE_H
99 #include "ps_bitenc.h"
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)
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 */
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
116 typedef struct T_PS_DATA
{
121 INT iidQuantModeLast
;
122 INT iidDiffMode
[PS_MAX_ENVELOPES
];
123 INT iidIdx
[PS_MAX_ENVELOPES
][PS_MAX_BANDS
];
124 INT iidIdxLast
[PS_MAX_BANDS
];
129 INT iccQuantModeLast
;
130 INT iccDiffMode
[PS_MAX_ENVELOPES
];
131 INT iccIdx
[PS_MAX_ENVELOPES
][PS_MAX_BANDS
];
132 INT iccIdxLast
[PS_MAX_BANDS
];
141 } PS_DATA
, *HANDLE_PS_DATA
;
144 typedef struct T_PS_ENCODE
{
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
;
156 UCHAR psBandNrgScale
[PS_MAX_BANDS
];
161 typedef struct T_PS_ENCODE
*HANDLE_PS_ENCODE
;
163 FDK_PSENC_ERROR
FDKsbrEnc_CreatePSEncode(
164 HANDLE_PS_ENCODE
*phPsEncode
167 FDK_PSENC_ERROR
FDKsbrEnc_InitPSEncode(
168 HANDLE_PS_ENCODE hPsEncode
,
169 const PS_BANDS psEncMode
,
170 const FIXP_DBL iidQuantErrorThreshold
173 FDK_PSENC_ERROR
FDKsbrEnc_DestroyPSEncode(
174 HANDLE_PS_ENCODE
*phPsEncode
177 FDK_PSENC_ERROR
FDKsbrEnc_PSEncode(
178 HANDLE_PS_ENCODE hPsEncode
,
179 HANDLE_PS_OUT hPsOut
,
182 FIXP_DBL
*hybridData
[HYBRID_FRAMESIZE
][MAX_PS_CHANNELS
][2],