1
2/* -----------------------------------------------------------------------------------------------------------
3Software License for The Fraunhofer FDK AAC Codec Library for Android
4
5� Copyright  1995 - 2013 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/******************************** MPEG Audio Encoder **************************
85
86   Initial author:       M. Werner
87   contents/description: Quantizing & coding data
88
89******************************************************************************/
90
91#ifndef _QC_DATA_H
92#define _QC_DATA_H
93
94
95#include "psy_const.h"
96#include "dyn_bits.h"
97#include "adj_thr_data.h"
98#include "line_pe.h"
99#include "FDK_audio.h"
100#include "interface.h"
101
102
103typedef enum {
104  QCDATA_BR_MODE_INVALID = -1,
105  QCDATA_BR_MODE_CBR     =  0,
106  QCDATA_BR_MODE_VBR_1   =  1, /* 32 kbps/channel */
107  QCDATA_BR_MODE_VBR_2   =  2, /* 40 kbps/channel */
108  QCDATA_BR_MODE_VBR_3   =  3, /* 48 kbps/channel */
109  QCDATA_BR_MODE_VBR_4   =  4, /* 64 kbps/channel */
110  QCDATA_BR_MODE_VBR_5   =  5, /* 96 kbps/channel */
111  QCDATA_BR_MODE_FF      =  6,  /* Fixed frame mode. */
112  QCDATA_BR_MODE_SFR     =  7  /* Superframe mode. */
113
114
115} QCDATA_BR_MODE;
116
117typedef struct {
118  MP4_ELEMENT_ID elType;
119  INT instanceTag;
120  INT nChannelsInEl;
121  INT ChannelIndex[2];
122  FIXP_DBL relativeBits;
123} ELEMENT_INFO;
124
125typedef struct {
126  CHANNEL_MODE encMode;
127  INT nChannels;
128  INT nChannelsEff;
129  INT nElements;
130  ELEMENT_INFO elInfo[(8)];
131} CHANNEL_MAPPING;
132
133typedef struct {
134  INT paddingRest;
135} PADDING;
136
137
138/* Quantizing & coding stage */
139
140struct QC_INIT{
141  CHANNEL_MAPPING* channelMapping;
142  INT sceCpe;      /* not used yet                         */
143  INT maxBits;     /* maximum number of bits in reservoir  */
144  INT averageBits; /* average number of bits we should use */
145  INT bitRes;
146  INT sampleRate;       /* output sample rate                   */
147  INT advancedBitsToPe; /* if set, calc bits2PE factor depending on samplerate */
148  INT staticBits;  /* Bits per frame consumed by transport layers. */
149  QCDATA_BR_MODE bitrateMode;
150  INT meanPe;
151  INT chBitrate;
152  INT invQuant;
153  INT maxIterations; /* Maximum number of allowed iterations before FDKaacEnc_crashRecovery() is applied. */
154  FIXP_DBL maxBitFac;
155  INT bitrate;
156  INT nSubFrames; /* helper variable */
157  INT minBits;    /* minimal number of bits in one frame*/
158
159  PADDING padding;
160};
161
162typedef struct
163{
164  FIXP_DBL      mdctSpectrum[(1024)];
165
166  SHORT         quantSpec[(1024)];
167
168  UINT          maxValueInSfb[MAX_GROUPED_SFB];
169  INT           scf[MAX_GROUPED_SFB];
170  INT           globalGain;
171  SECTION_DATA  sectionData;
172
173  FIXP_DBL      sfbFormFactorLdData[MAX_GROUPED_SFB];
174
175  FIXP_DBL      sfbThresholdLdData[MAX_GROUPED_SFB];
176  FIXP_DBL      sfbMinSnrLdData[MAX_GROUPED_SFB];
177  FIXP_DBL      sfbEnergyLdData[MAX_GROUPED_SFB];
178  FIXP_DBL      sfbEnergy[MAX_GROUPED_SFB];
179  FIXP_DBL      sfbWeightedEnergyLdData[MAX_GROUPED_SFB];
180
181  FIXP_DBL      sfbEnFacLd[MAX_GROUPED_SFB];
182
183  FIXP_DBL      sfbSpreadEnergy[MAX_GROUPED_SFB];
184
185} QC_OUT_CHANNEL;
186
187
188typedef struct
189{
190  EXT_PAYLOAD_TYPE  type;  /* type of the extension payload */
191  INT    nPayloadBits;     /* size of the payload */
192  UCHAR *pPayload;         /* pointer to payload */
193
194} QC_OUT_EXTENSION;
195
196
197typedef struct
198{
199  INT          staticBitsUsed; /* for verification purposes */
200  INT          dynBitsUsed;    /* for verification purposes */
201
202  INT          extBitsUsed;    /* bit consumption of extended fill elements */
203  INT          nExtensions;    /* number of extension payloads for this element */
204  QC_OUT_EXTENSION extension[(1)];  /* reffering extension payload */
205
206  INT          grantedDynBits;
207
208  INT          grantedPe;
209  INT          grantedPeCorr;
210
211  PE_DATA      peData;
212
213  QC_OUT_CHANNEL *qcOutChannel[(2)];
214
215
216} QC_OUT_ELEMENT;
217
218typedef struct
219{
220  QC_OUT_ELEMENT    *qcElement[(8)];
221  QC_OUT_CHANNEL    *pQcOutChannels[(8)];
222  QC_OUT_EXTENSION   extension[(2+2)];  /* global extension payload */
223  INT          nExtensions;       /* number of extension payloads for this AU */
224  INT          maxDynBits;        /* maximal allowed dynamic bits in frame */
225  INT          grantedDynBits;    /* granted dynamic bits in frame */
226  INT          totFillBits;       /* fill bits */
227  INT          elementExtBits;    /* element associated extension payload bits, e.g. sbr, drc ... */
228  INT          globalExtBits;     /* frame/au associated extension payload bits (anc data ...) */
229  INT          staticBits;        /* aac side info bits */
230
231  INT          totalNoRedPe;
232  INT          totalGrantedPeCorr;
233
234  INT          usedDynBits;       /* number of dynamic bits in use */
235  INT          alignBits;         /* AU alignment bits */
236  INT          totalBits;         /* sum of static, dyn, sbr, fill, align and dse bits */
237
238} QC_OUT;
239
240typedef struct {
241  INT chBitrateEl;                    /* channel bitrate in element (totalbitrate*el_relativeBits/el_channels) */
242  INT maxBitsEl;                      /* used in crash recovery */
243  INT bitResLevelEl;                  /* update bitreservoir level in each call of FDKaacEnc_QCMain */
244  INT maxBitResBitsEl;                /* nEffChannels*6144 - averageBitsInFrame */
245  FIXP_DBL relativeBitsEl;            /* Bits relative to total Bits*/
246} ELEMENT_BITS;
247
248typedef struct
249{
250  /* this is basically struct QC_INIT */
251
252  INT globHdrBits;
253  INT maxBitsPerFrame;   /* maximal allowed bits per frame, 6144*nChannelsEff */
254  INT minBitsPerFrame;   /* minimal allowd bits per fram, superframing - DRM */
255  INT nElements;
256  QCDATA_BR_MODE bitrateMode;
257  INT bitDistributionMode; /* 0: full bitreservoir, 1: reduced bitreservoir, 2: disabled bitreservoir */
258  INT bitResTot;
259  INT bitResTotMax;
260  INT maxIterations;      /* Maximum number of allowed iterations before FDKaacEnc_crashRecovery() is applied. */
261  INT invQuant;
262
263  FIXP_DBL vbrQualFactor;
264  FIXP_DBL maxBitFac;
265
266  PADDING padding;
267
268  ELEMENT_BITS  *elementBits[(8)];
269  BITCNTR_STATE *hBitCounter;
270  ADJ_THR_STATE *hAdjThr;
271
272} QC_STATE;
273
274#endif /* _QC_DATA_H */
275
276
277
278
279