1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
|
/* -----------------------------------------------------------------------------------------------------------
Software License for The Fraunhofer FDK AAC Codec Library for Android
� Copyright 1995 - 2013 Fraunhofer-Gesellschaft zur F�rderung der angewandten Forschung e.V.
All rights reserved.
1. INTRODUCTION
The Fraunhofer FDK AAC Codec Library for Android ("FDK AAC Codec") is software that implements
the MPEG Advanced Audio Coding ("AAC") encoding and decoding scheme for digital audio.
This FDK AAC Codec software is intended to be used on a wide variety of Android devices.
AAC's HE-AAC and HE-AAC v2 versions are regarded as today's most efficient general perceptual
audio codecs. AAC-ELD is considered the best-performing full-bandwidth communications codec by
independent studies and is widely deployed. AAC has been standardized by ISO and IEC as part
of the MPEG specifications.
Patent licenses for necessary patent claims for the FDK AAC Codec (including those of Fraunhofer)
may be obtained through Via Licensing (www.vialicensing.com) or through the respective patent owners
individually for the purpose of encoding or decoding bit streams in products that are compliant with
the ISO/IEC MPEG audio standards. Please note that most manufacturers of Android devices already license
these patent claims through Via Licensing or directly from the patent owners, and therefore FDK AAC Codec
software may already be covered under those patent licenses when it is used for those licensed purposes only.
Commercially-licensed AAC software libraries, including floating-point versions with enhanced sound quality,
are also available from Fraunhofer. Users are encouraged to check the Fraunhofer website for additional
applications information and documentation.
2. COPYRIGHT LICENSE
Redistribution and use in source and binary forms, with or without modification, are permitted without
payment of copyright license fees provided that you satisfy the following conditions:
You must retain the complete text of this software license in redistributions of the FDK AAC Codec or
your modifications thereto in source code form.
You must retain the complete text of this software license in the documentation and/or other materials
provided with redistributions of the FDK AAC Codec or your modifications thereto in binary form.
You must make available free of charge copies of the complete source code of the FDK AAC Codec and your
modifications thereto to recipients of copies in binary form.
The name of Fraunhofer may not be used to endorse or promote products derived from this library without
prior written permission.
You may not charge copyright license fees for anyone to use, copy or distribute the FDK AAC Codec
software or your modifications thereto.
Your modified versions of the FDK AAC Codec must carry prominent notices stating that you changed the software
and the date of any change. For modified versions of the FDK AAC Codec, the term
"Fraunhofer FDK AAC Codec Library for Android" must be replaced by the term
"Third-Party Modified Version of the Fraunhofer FDK AAC Codec Library for Android."
3. NO PATENT LICENSE
NO EXPRESS OR IMPLIED LICENSES TO ANY PATENT CLAIMS, including without limitation the patents of Fraunhofer,
ARE GRANTED BY THIS SOFTWARE LICENSE. Fraunhofer provides no warranty of patent non-infringement with
respect to this software.
You may use this FDK AAC Codec software or modifications thereto only for purposes that are authorized
by appropriate patent licenses.
4. DISCLAIMER
This FDK AAC Codec software is provided by Fraunhofer on behalf of the copyright holders and contributors
"AS IS" and WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES, including but not limited to the implied warranties
of merchantability and fitness for a particular purpose. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
CONTRIBUTORS BE LIABLE for any direct, indirect, incidental, special, exemplary, or consequential damages,
including but not limited to procurement of substitute goods or services; loss of use, data, or profits,
or business interruption, however caused and on any theory of liability, whether in contract, strict
liability, or tort (including negligence), arising in any way out of the use of this software, even if
advised of the possibility of such damage.
5. CONTACT INFORMATION
Fraunhofer Institute for Integrated Circuits IIS
Attention: Audio and Multimedia Departments - FDK AAC LL
Am Wolfsmantel 33
91058 Erlangen, Germany
www.iis.fraunhofer.de/amm
amm-info@iis.fraunhofer.de
----------------------------------------------------------------------------------------------------------- */
/***************************** MPEG Audio Encoder ***************************
Initial Authors: Markus Multrus
Contents/Description: PS Wrapper, Downmix header file
******************************************************************************/
#ifndef __INCLUDED_PS_MAIN_H
#define __INCLUDED_PS_MAIN_H
/* Includes ******************************************************************/
#include "sbr_def.h"
#include "qmf.h"
#include "ps_encode.h"
#include "FDK_bitstream.h"
#include "FDK_hybrid.h"
/* Data Types ****************************************************************/
typedef enum {
PSENC_STEREO_BANDS_INVALID = 0,
PSENC_STEREO_BANDS_10 = 10,
PSENC_STEREO_BANDS_20 = 20
} PSENC_STEREO_BANDS_CONFIG;
typedef enum {
PSENC_NENV_1 = 1,
PSENC_NENV_2 = 2,
PSENC_NENV_4 = 4,
PSENC_NENV_DEFAULT = PSENC_NENV_2,
PSENC_NENV_MAX = PSENC_NENV_4
} PSENC_NENV_CONFIG;
typedef struct {
UINT bitrateFrom; /* inclusive */
UINT bitrateTo; /* exclusive */
PSENC_STEREO_BANDS_CONFIG nStereoBands;
PSENC_NENV_CONFIG nEnvelopes;
LONG iidQuantErrorThreshold; /* quantization threshold to switch between coarse and fine iid quantization */
} psTuningTable_t;
/* Function / Class Declarations *********************************************/
typedef struct T_PARAMETRIC_STEREO {
HANDLE_PS_ENCODE hPsEncode;
PS_OUT psOut[2];
FIXP_DBL __staticHybridData[HYBRID_READ_OFFSET][MAX_PS_CHANNELS][2][MAX_HYBRID_BANDS];
FIXP_DBL *pHybridData[HYBRID_READ_OFFSET+HYBRID_FRAMESIZE][MAX_PS_CHANNELS][2];
FIXP_QMF qmfDelayLines[2][QMF_MAX_TIME_SLOTS>>1][QMF_CHANNELS];
int qmfDelayScale;
INT psDelay;
UINT maxEnvelopes;
UCHAR dynBandScale[PS_MAX_BANDS];
FIXP_DBL maxBandValue[PS_MAX_BANDS];
SCHAR dmxScale;
INT initPS;
INT noQmfSlots;
INT noQmfBands;
FIXP_DBL __staticHybAnaStatesLF[MAX_PS_CHANNELS][2*HYBRID_FILTER_LENGTH*HYBRID_MAX_QMF_BANDS];
FIXP_DBL __staticHybAnaStatesHF[MAX_PS_CHANNELS][2*HYBRID_FILTER_DELAY*(QMF_CHANNELS-HYBRID_MAX_QMF_BANDS)];
FDK_ANA_HYB_FILTER fdkHybAnaFilter[MAX_PS_CHANNELS];
FDK_SYN_HYB_FILTER fdkHybSynFilter;
} PARAMETRIC_STEREO;
typedef struct T_PSENC_CONFIG {
INT frameSize;
INT qmfFilterMode;
INT sbrPsDelay;
PSENC_STEREO_BANDS_CONFIG nStereoBands;
PSENC_NENV_CONFIG maxEnvelopes;
FIXP_DBL iidQuantErrorThreshold;
} PSENC_CONFIG, *HANDLE_PSENC_CONFIG;
typedef struct T_PARAMETRIC_STEREO *HANDLE_PARAMETRIC_STEREO;
/**
* \brief Create a parametric stereo encoder instance.
*
* \param phParametricStereo A pointer to a parametric stereo handle to be allocated. Initialized on return.
*
* \return
* - PSENC_OK, on succes.
* - PSENC_INVALID_HANDLE, PSENC_MEMORY_ERROR, on failure.
*/
FDK_PSENC_ERROR PSEnc_Create(
HANDLE_PARAMETRIC_STEREO *phParametricStereo
);
/**
* \brief Initialize a parametric stereo encoder instance.
*
* \param hParametricStereo Meta Data handle.
* \param hPsEncConfig Filled parametric stereo configuration structure.
* \param noQmfSlots Number of slots within one audio frame.
* \param noQmfBands Number of QMF bands.
* \param dynamic_RAM Pointer to preallocated workbuffer.
*
* \return
* - PSENC_OK, on succes.
* - PSENC_INVALID_HANDLE, PSENC_INIT_ERROR, on failure.
*/
FDK_PSENC_ERROR PSEnc_Init(
HANDLE_PARAMETRIC_STEREO hParametricStereo,
const HANDLE_PSENC_CONFIG hPsEncConfig,
INT noQmfSlots,
INT noQmfBands
,UCHAR *dynamic_RAM
);
/**
* \brief Destroy parametric stereo encoder instance.
*
* Deallocate instance and free whole memory.
*
* \param phParametricStereo Pointer to the parametric stereo handle to be deallocated.
*
* \return
* - PSENC_OK, on succes.
* - PSENC_INVALID_HANDLE, on failure.
*/
FDK_PSENC_ERROR PSEnc_Destroy(
HANDLE_PARAMETRIC_STEREO *phParametricStereo
);
/**
* \brief Apply parametric stereo processing.
*
* \param hParametricStereo Meta Data handle.
* \param samples Pointer to 2 channel audio input signal.
* \param timeInStride, Stride factor of input buffer.
* \param hQmfAnalysis, Pointer to QMF analysis filterbanks.
* \param downmixedRealQmfData Pointer to real QMF buffer to be written to.
* \param downmixedImagQmfData Pointer to imag QMF buffer to be written to.
* \param downsampledOutSignal Pointer to buffer where to write downmixed timesignal.
* \param sbrSynthQmf Pointer to QMF synthesis filterbank.
* \param qmfScale Return scaling factor of the qmf data.
* \param sendHeader Signal whether to write header data.
*
* \return
* - PSENC_OK, on succes.
* - PSENC_INVALID_HANDLE, PSENC_ENCODE_ERROR, on failure.
*/
FDK_PSENC_ERROR FDKsbrEnc_PSEnc_ParametricStereoProcessing(
HANDLE_PARAMETRIC_STEREO hParametricStereo,
INT_PCM *samples[2],
UINT timeInStride,
QMF_FILTER_BANK **hQmfAnalysis,
FIXP_QMF **RESTRICT downmixedRealQmfData,
FIXP_QMF **RESTRICT downmixedImagQmfData,
INT_PCM *downsampledOutSignal,
HANDLE_QMF_FILTER_BANK sbrSynthQmf,
SCHAR *qmfScale,
const int sendHeader
);
/**
* \brief Write parametric stereo bitstream.
*
* Write ps_data() element to bitstream and return number of written bits.
* Returns number of written bits only, if hBitstream == NULL.
*
* \param hParametricStereo Meta Data handle.
* \param hBitstream Bitstream buffer handle.
*
* \return
* - number of written bits.
*/
INT FDKsbrEnc_PSEnc_WritePSData(
HANDLE_PARAMETRIC_STEREO hParametricStereo,
HANDLE_FDK_BITSTREAM hBitstream
);
#endif /* __INCLUDED_PS_MAIN_H */
|
