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 ----------------------------------------------------------------------------------------------------------- */
86 \brief SBR bit writing
97 struct SBR_BITSTREAM_DATA
103 INT NrSendHeaderData
; /**< input from commandline */
104 INT CountSendHeaderData
; /**< modulo count. If < 0 then no counting is done (no SBR headers) */
107 typedef struct SBR_BITSTREAM_DATA
*HANDLE_SBR_BITSTREAM_DATA
;
109 struct SBR_HEADER_DATA
112 INT sbr_start_frequency
;
113 INT sbr_stop_frequency
;
119 INT sbr_lc_stereo_mode
;
120 INT sbr_limiter_bands
;
121 INT sbr_limiter_gains
;
122 INT sbr_interpol_freq
;
123 INT sbr_smoothing_length
;
128 element of channelpairelement
134 element of singlechannelelement
138 typedef struct SBR_HEADER_DATA
*HANDLE_SBR_HEADER_DATA
;
147 INVF_MODE sbr_invf_mode
;
148 INVF_MODE sbr_invf_mode_vec
[MAX_NUM_NOISE_VALUES
];
150 XPOS_MODE sbr_xpos_mode
;
152 INT ienvelope
[MAX_ENVELOPES
][MAX_FREQ_COEFFS
];
154 INT codeBookScfLavBalance
;
156 const INT
*hufftableTimeC
;
157 const INT
*hufftableFreqC
;
158 const UCHAR
*hufftableTimeL
;
159 const UCHAR
*hufftableFreqL
;
161 const INT
*hufftableLevelTimeC
;
162 const INT
*hufftableBalanceTimeC
;
163 const INT
*hufftableLevelFreqC
;
164 const INT
*hufftableBalanceFreqC
;
165 const UCHAR
*hufftableLevelTimeL
;
166 const UCHAR
*hufftableBalanceTimeL
;
167 const UCHAR
*hufftableLevelFreqL
;
168 const UCHAR
*hufftableBalanceFreqL
;
171 const UCHAR
*hufftableNoiseTimeL
;
172 const INT
*hufftableNoiseTimeC
;
173 const UCHAR
*hufftableNoiseFreqL
;
174 const INT
*hufftableNoiseFreqC
;
176 const UCHAR
*hufftableNoiseLevelTimeL
;
177 const INT
*hufftableNoiseLevelTimeC
;
178 const UCHAR
*hufftableNoiseBalanceTimeL
;
179 const INT
*hufftableNoiseBalanceTimeC
;
180 const UCHAR
*hufftableNoiseLevelFreqL
;
181 const INT
*hufftableNoiseLevelFreqC
;
182 const UCHAR
*hufftableNoiseBalanceFreqL
;
183 const INT
*hufftableNoiseBalanceFreqC
;
185 HANDLE_SBR_GRID hSbrBSGrid
;
189 UCHAR addHarmonic
[MAX_FREQ_COEFFS
];
192 /* calculated helper vars */
193 INT si_sbr_start_env_bits_balance
;
194 INT si_sbr_start_env_bits
;
195 INT si_sbr_start_noise_bits_balance
;
196 INT si_sbr_start_noise_bits
;
199 INT noScfBands
[MAX_ENVELOPES
];
200 INT domain_vec
[MAX_ENVELOPES
];
201 INT domain_vec_noise
[MAX_ENVELOPES
];
202 SCHAR sbr_noise_levels
[MAX_FREQ_COEFFS
];
206 AMP_RES init_sbr_amp_res
;
207 AMP_RES currentAmpResFF
;
213 UCHAR extended_data_buffer
[SBR_EXTENDED_DATA_MAX_CNT
];
217 typedef struct SBR_ENV_DATA
*HANDLE_SBR_ENV_DATA
;
221 INT
FDKsbrEnc_WriteEnvSingleChannelElement(struct SBR_HEADER_DATA
*sbrHeaderData
,
222 struct T_PARAMETRIC_STEREO
*hParametricStereo
,
223 struct SBR_BITSTREAM_DATA
*sbrBitstreamData
,
224 struct SBR_ENV_DATA
*sbrEnvData
,
225 struct COMMON_DATA
*cmonData
,
226 UINT sbrSyntaxFlags
);
229 INT
FDKsbrEnc_WriteEnvChannelPairElement(struct SBR_HEADER_DATA
*sbrHeaderData
,
230 struct T_PARAMETRIC_STEREO
*hParametricStereo
,
231 struct SBR_BITSTREAM_DATA
*sbrBitstreamData
,
232 struct SBR_ENV_DATA
*sbrEnvDataLeft
,
233 struct SBR_ENV_DATA
*sbrEnvDataRight
,
234 struct COMMON_DATA
*cmonData
,
235 UINT sbrSyntaxFlags
);
239 INT
FDKsbrEnc_CountSbrChannelPairElement (struct SBR_HEADER_DATA
*sbrHeaderData
,
240 struct T_PARAMETRIC_STEREO
*hParametricStereo
,
241 struct SBR_BITSTREAM_DATA
*sbrBitstreamData
,
242 struct SBR_ENV_DATA
*sbrEnvDataLeft
,
243 struct SBR_ENV_DATA
*sbrEnvDataRight
,
244 struct COMMON_DATA
*cmonData
,
245 UINT sbrSyntaxFlags
);
249 /* debugging and tuning functions */
251 /*#define SBR_ENV_STATISTICS */
254 /*#define SBR_PAYLOAD_MONITOR*/