1
2 /* -----------------------------------------------------------------------------------------------------------
3 Software License for The Fraunhofer FDK AAC Codec Library for Android
4
5 � Copyright 1995 - 2012 Fraunhofer-Gesellschaft zur F�rderung der angewandten Forschung e.V.
6 All rights reserved.
7
8 1. INTRODUCTION
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.
12
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.
17
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.
24
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.
28
29 2. COPYRIGHT LICENSE
30
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:
33
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.
36
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.
41
42 The name of Fraunhofer may not be used to endorse or promote products derived from this library without
43 prior written permission.
44
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.
47
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."
52
53 3. NO PATENT LICENSE
54
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.
58
59 You may use this FDK AAC Codec software or modifications thereto only for purposes that are authorized
60 by appropriate patent licenses.
61
62 4. DISCLAIMER
63
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.
72
73 5. CONTACT INFORMATION
74
75 Fraunhofer Institute for Integrated Circuits IIS
76 Attention: Audio and Multimedia Departments - FDK AAC LL
77 Am Wolfsmantel 33
78 91058 Erlangen, Germany
79
80 www.iis.fraunhofer.de/amm
81 amm-info@iis.fraunhofer.de
82 ----------------------------------------------------------------------------------------------------------- */
83
84 /***************************** MPEG-4 AAC Encoder **************************
85
86 Author(s):
87 Description:
88
89 ******************************************************************************/
90
91 #include "tp_data.h"
92
93 #include "tpenc_lib.h"
94 #include "tpenc_asc.h"
95 #include "FDK_bitstream.h"
96 #include "genericStds.h"
97
98 #define PCE_MAX_ELEMENTS 8
99
100 /**
101 * Describe a PCE based on placed channel elements and element type sequence.
102 */
103 typedef struct {
104
105 UCHAR num_front_channel_elements; /*!< Number of front channel elements. */
106 UCHAR num_side_channel_elements; /*!< Number of side channel elements. */
107 UCHAR num_back_channel_elements; /*!< Number of back channel elements. */
108 UCHAR num_lfe_channel_elements; /*!< Number of lfe channel elements. */
109 MP4_ELEMENT_ID el_list[PCE_MAX_ELEMENTS];/*!< List contains sequence describing the elements
110 in present channel mode. (MPEG order) */
111 } PCE_CONFIGURATION;
112
113
114 /**
115 * Map an incoming channel mode to a existing PCE configuration entry.
116 */
117 typedef struct {
118
119 CHANNEL_MODE channel_mode; /*!< Present channel mode. */
120 PCE_CONFIGURATION pce_configuration; /*!< Program config element description. */
121
122 } CHANNEL_CONFIGURATION;
123
124
125 /**
126 * \brief Table contains all supported channel modes and according PCE configuration description.
127 *
128 * The number of channel element parameter describes the kind of consecutively elements.
129 * E.g. MODE_1_2_2_2_1 means:
130 * - First 2 elements (SCE,CPE) are front channel elements.
131 * - Following element (CPE) is a side channel element.
132 * - Next element (CPE) is a back channel element.
133 * - Last element (LFE) is a lfe channel element.
134 */
135 static const CHANNEL_CONFIGURATION pceConfigTab[] =
136 {
137 { MODE_1, { 1, 0, 0, 0, { ID_SCE, ID_NONE, ID_NONE, ID_NONE, ID_NONE, ID_NONE, ID_NONE, ID_NONE } } },
138 { MODE_2, { 1, 0, 0, 0, { ID_CPE, ID_NONE, ID_NONE, ID_NONE, ID_NONE, ID_NONE, ID_NONE, ID_NONE } } },
139 { MODE_1_2, { 2, 0, 0, 0, { ID_SCE, ID_CPE, ID_NONE, ID_NONE, ID_NONE, ID_NONE, ID_NONE, ID_NONE } } },
140 { MODE_1_2_1, { 2, 0, 1, 0, { ID_SCE, ID_CPE, ID_SCE, ID_NONE, ID_NONE, ID_NONE, ID_NONE, ID_NONE } } },
141 { MODE_1_2_2, { 2, 0, 1, 0, { ID_SCE, ID_CPE, ID_CPE, ID_NONE, ID_NONE, ID_NONE, ID_NONE, ID_NONE } } },
142 { MODE_1_2_2_1, { 2, 0, 1, 1, { ID_SCE, ID_CPE, ID_CPE, ID_LFE, ID_NONE, ID_NONE, ID_NONE, ID_NONE } } },
143 { MODE_1_2_2_2_1, { 2, 1, 1, 1, { ID_SCE, ID_CPE, ID_CPE, ID_CPE, ID_LFE, ID_NONE, ID_NONE, ID_NONE } } },
144
145 { MODE_1_1, { 2, 0, 0, 0, { ID_SCE, ID_SCE, ID_NONE, ID_NONE, ID_NONE, ID_NONE, ID_NONE, ID_NONE } } },
146 { MODE_1_1_1_1, { 2, 2, 0, 0, { ID_SCE, ID_SCE, ID_SCE, ID_SCE, ID_NONE, ID_NONE, ID_NONE, ID_NONE } } },
147 { MODE_1_1_1_1_1_1, { 2, 2, 2, 0, { ID_SCE, ID_SCE, ID_SCE, ID_SCE, ID_SCE, ID_SCE, ID_NONE, ID_NONE } } },
148 { MODE_1_1_1_1_1_1_1_1, { 3, 2, 3, 0, { ID_SCE, ID_SCE, ID_SCE, ID_SCE, ID_SCE, ID_SCE, ID_SCE, ID_SCE } } },
149
150 { MODE_2_2, { 1, 0, 1, 0, { ID_CPE, ID_CPE, ID_NONE, ID_NONE, ID_NONE, ID_NONE, ID_NONE, ID_NONE } } },
151 { MODE_2_2_2, { 1, 1, 1, 0, { ID_CPE, ID_CPE, ID_CPE, ID_NONE, ID_NONE, ID_NONE, ID_NONE, ID_NONE } } },
152 { MODE_2_2_2_2, { 4, 0, 0, 0, { ID_CPE, ID_CPE, ID_CPE, ID_CPE, ID_NONE, ID_NONE, ID_NONE, ID_NONE } } },
153
154 { MODE_2_1, { 1, 0, 1, 0, { ID_CPE, ID_SCE, ID_NONE, ID_NONE, ID_NONE, ID_NONE, ID_NONE, ID_NONE } } }
155 };
156
157
158 /**
159 * \brief Get program config element description for existing channel mode.
160 *
161 * \param channel_mode Current channel mode.
162 *
163 * \return
164 * - Pointer to PCE_CONFIGURATION entry, on success.
165 * - NULL, on failure.
166 */
getPceEntry(const CHANNEL_MODE channel_mode)167 static const PCE_CONFIGURATION* getPceEntry(
168 const CHANNEL_MODE channel_mode
169 )
170 {
171 UINT i;
172 const PCE_CONFIGURATION *pce_config = NULL;
173
174 for (i=0; i < (sizeof(pceConfigTab)/sizeof(CHANNEL_CONFIGURATION)); i++) {
175 if (pceConfigTab[i].channel_mode == channel_mode) {
176 pce_config = &pceConfigTab[i].pce_configuration;
177 }
178 }
179
180 return pce_config;
181 }
182
getChannelConfig(CHANNEL_MODE channel_mode)183 int getChannelConfig( CHANNEL_MODE channel_mode )
184 {
185 INT chan_config = 0;
186
187 switch(channel_mode) {
188 case MODE_1: chan_config = 1; break;
189 case MODE_2: chan_config = 2; break;
190 case MODE_1_2: chan_config = 3; break;
191 case MODE_1_2_1: chan_config = 4; break;
192 case MODE_1_2_2: chan_config = 5; break;
193 case MODE_1_2_2_1: chan_config = 6; break;
194 case MODE_1_2_2_2_1: chan_config = 7; break;
195
196 default: chan_config = 0;
197 }
198
199 return chan_config;
200 }
201
transportEnc_GetChannelMode(int noChannels)202 CHANNEL_MODE transportEnc_GetChannelMode( int noChannels )
203 {
204 CHANNEL_MODE chMode;
205
206 if (noChannels <= 8 && noChannels > 0)
207 chMode = (CHANNEL_MODE)((noChannels == 8) ? 7 : noChannels); /* see : iso/mpeg4 v1 audio subpart1*/
208 else
209 chMode = MODE_UNKNOWN;
210
211 return chMode;
212 }
213
214 #ifdef TP_PCE_ENABLE
transportEnc_writePCE(HANDLE_FDK_BITSTREAM hBs,CHANNEL_MODE channelMode,INT sampleRate,int instanceTagPCE,int profile,int matrixMixdownA,int pseudoSurroundEnable,UINT alignAnchor)215 int transportEnc_writePCE(HANDLE_FDK_BITSTREAM hBs,
216 CHANNEL_MODE channelMode,
217 INT sampleRate,
218 int instanceTagPCE,
219 int profile,
220 int matrixMixdownA,
221 int pseudoSurroundEnable,
222 UINT alignAnchor)
223 {
224 int sampleRateIndex, i;
225 const PCE_CONFIGURATION* config = NULL;
226 const MP4_ELEMENT_ID* pEl_list = NULL;
227 UCHAR cpeCnt=0, sceCnt=0, lfeCnt=0;
228
229 sampleRateIndex = getSamplingRateIndex(sampleRate);
230 if (sampleRateIndex == 15) {
231 return -1;
232 }
233
234 if ((config=getPceEntry(channelMode))==NULL) {
235 return -1;
236 }
237
238 /* Pointer to first element in element list. */
239 pEl_list = &config->el_list[0];
240
241 FDKwriteBits(hBs, instanceTagPCE, 4); /* Element instance tag */
242 FDKwriteBits(hBs, profile, 2); /* Object type */
243 FDKwriteBits(hBs, sampleRateIndex, 4); /* Sample rate index*/
244
245 FDKwriteBits(hBs, config->num_front_channel_elements, 4); /* Front channel Elements */
246 FDKwriteBits(hBs, config->num_side_channel_elements , 4); /* No Side Channel Elements */
247 FDKwriteBits(hBs, config->num_back_channel_elements , 4); /* No Back channel Elements */
248 FDKwriteBits(hBs, config->num_lfe_channel_elements , 2); /* No Lfe channel elements */
249
250 FDKwriteBits(hBs, 0, 3); /* No assoc data elements */
251 FDKwriteBits(hBs, 0, 4); /* No valid cc elements */
252 FDKwriteBits(hBs, 0, 1); /* Mono mixdown present */
253 FDKwriteBits(hBs, 0, 1); /* Stereo mixdown present */
254
255 if ( matrixMixdownA!=0 && ((channelMode==MODE_1_2_2)||(channelMode==MODE_1_2_2_1)) ) {
256 FDKwriteBits(hBs, 1, 1); /* Matrix mixdown present */
257 FDKwriteBits(hBs, (matrixMixdownA-1)&0x3, 2); /* matrix_mixdown_idx */
258 FDKwriteBits(hBs, pseudoSurroundEnable&0x1, 1); /* pseudo_surround_enable */
259 }
260 else {
261 FDKwriteBits(hBs, 0, 1); /* Matrix mixdown not present */
262 }
263
264 for(i=0; i<config->num_front_channel_elements; i++) {
265 UCHAR isCpe = (*pEl_list++==ID_CPE) ? 1 : 0;
266 UCHAR tag = (isCpe) ? cpeCnt++ : sceCnt++;
267 FDKwriteBits(hBs, isCpe, 1); /* Front channel Elements is CPE? */
268 FDKwriteBits(hBs, tag, 4); /* Front channel Instance Tag.*/
269 }
270 for(i=0; i<config->num_side_channel_elements; i++) {
271 UCHAR isCpe = (*pEl_list++==ID_CPE) ? 1 : 0;
272 UCHAR tag = (isCpe) ? cpeCnt++ : sceCnt++;
273 FDKwriteBits(hBs, isCpe, 1); /* Front channel Elements is CPE? */
274 FDKwriteBits(hBs, tag, 4); /* Front channel Instance Tag.*/
275 }
276 for(i=0; i<config->num_back_channel_elements; i++) {
277 UCHAR isCpe = (*pEl_list++==ID_CPE) ? 1 : 0;
278 UCHAR tag = (isCpe) ? cpeCnt++ : sceCnt++;
279 FDKwriteBits(hBs, isCpe, 1); /* Front channel Elements is CPE? */
280 FDKwriteBits(hBs, tag, 4); /* Front channel Instance Tag.*/
281 }
282 for(i=0; i<config->num_lfe_channel_elements; i++) {
283 FDKwriteBits(hBs, lfeCnt++, 4); /* LFE channel Instance Tag. */
284 }
285
286 /* - num_valid_cc_elements always 0.
287 - num_assoc_data_elements always 0. */
288
289 /* Byte alignment: relative to alignAnchor
290 ADTS: align with respect to the first bit of the raw_data_block()
291 ADIF: align with respect to the first bit of the header
292 LATM: align with respect to the first bit of the ASC */
293 FDKbyteAlign(hBs, alignAnchor); /* Alignment */
294
295 FDKwriteBits(hBs, 0 ,8); /* Do no write any comment. */
296
297 /* - comment_field_bytes always 0. */
298
299 return 0;
300 }
301
transportEnc_GetPCEBits(CHANNEL_MODE channelMode,int matrixMixdownA,int bits)302 int transportEnc_GetPCEBits(CHANNEL_MODE channelMode,
303 int matrixMixdownA,
304 int bits)
305 {
306 const PCE_CONFIGURATION* config = NULL;
307
308 if ((config=getPceEntry(channelMode))==NULL) {
309 return -1; /* unsupported channelmapping */
310 }
311
312 bits += 4 + 2 + 4; /* Element instance tag + Object type + Sample rate index */
313 bits += 4 + 4 + 4 + 2; /* No (front + side + back + lfe channel) elements */
314 bits += 3 + 4; /* No (assoc data + valid cc) elements */
315 bits += 1 + 1 + 1 ; /* Mono + Stereo + Matrix mixdown present */
316
317 if ( matrixMixdownA!=0 && ((channelMode==MODE_1_2_2)||(channelMode==MODE_1_2_2_1)) ) {
318 bits +=3; /* matrix_mixdown_idx + pseudo_surround_enable */
319 }
320
321 bits += (1+4) * (INT)config->num_front_channel_elements;
322 bits += (1+4) * (INT)config->num_side_channel_elements;
323 bits += (1+4) * (INT)config->num_back_channel_elements;
324 bits += (4) * (INT)config->num_lfe_channel_elements;
325
326 /* - num_valid_cc_elements always 0.
327 - num_assoc_data_elements always 0. */
328
329 if ((bits%8) != 0) {
330 bits += (8 - (bits%8)); /* Alignment */
331 }
332
333 bits += 8; /* Comment field bytes */
334
335 /* - comment_field_bytes alwys 0. */
336
337 return bits;
338 }
339 #endif /* TP_PCE_ENABLE */
340
writeAot(HANDLE_FDK_BITSTREAM hBitstreamBuffer,AUDIO_OBJECT_TYPE aot)341 static void writeAot(HANDLE_FDK_BITSTREAM hBitstreamBuffer, AUDIO_OBJECT_TYPE aot)
342 {
343 int tmp = (int) aot;
344
345 if (tmp > 31) {
346 FDKwriteBits( hBitstreamBuffer, AOT_ESCAPE, 5 );
347 FDKwriteBits( hBitstreamBuffer, tmp-32, 6 ); /* AudioObjectType */
348 } else {
349 FDKwriteBits( hBitstreamBuffer, tmp, 5 );
350 }
351 }
352
writeSampleRate(HANDLE_FDK_BITSTREAM hBitstreamBuffer,int sampleRate)353 static void writeSampleRate(HANDLE_FDK_BITSTREAM hBitstreamBuffer, int sampleRate)
354 {
355 int sampleRateIndex = getSamplingRateIndex(sampleRate);
356
357 FDKwriteBits( hBitstreamBuffer, sampleRateIndex, 4 );
358 if( sampleRateIndex == 15 ) {
359 FDKwriteBits( hBitstreamBuffer, sampleRate, 24 );
360 }
361 }
362
363 #ifdef TP_GA_ENABLE
364 static
transportEnc_writeGASpecificConfig(HANDLE_FDK_BITSTREAM asc,CODER_CONFIG * config,int extFlg,UINT alignAnchor)365 int transportEnc_writeGASpecificConfig(
366 HANDLE_FDK_BITSTREAM asc,
367 CODER_CONFIG *config,
368 int extFlg,
369 UINT alignAnchor
370 )
371 {
372 int aot = config->aot;
373 int samplesPerFrame = config->samplesPerFrame;
374
375 /* start of GASpecificConfig according to ISO/IEC 14496-3 Subpart 4, 4.4.1 */
376 FDKwriteBits( asc, ((samplesPerFrame==960 || samplesPerFrame==480)?1:0), 1); /* frameLengthFlag: 1 for a 960/480 (I)MDCT, 0 for a 1024/512 (I)MDCT*/
377 FDKwriteBits( asc, 0, 1); /* dependsOnCoreCoder: Sampling Rate Coder Specific, see in ISO/IEC 14496-3 Subpart 4, 4.4.1 */
378 FDKwriteBits( asc, extFlg, 1 ); /* Extension Flag: Shall be 1 for aot = 17,19,20,21,22,23 */
379
380 /* Write PCE if channel config is not 1-7 */
381 if (getChannelConfig(config->channelMode) == 0) {
382 transportEnc_writePCE(asc, config->channelMode, config->samplingRate, 0, 1, 0, 0, alignAnchor);
383 }
384 if (extFlg) {
385 if (aot == AOT_ER_BSAC) {
386 FDKwriteBits( asc, config->BSACnumOfSubFrame, 5 ); /* numOfSubFrame */
387 FDKwriteBits( asc, config->BSAClayerLength, 11 ); /* layer_length */
388 }
389 if ((aot == AOT_ER_AAC_LC) || (aot == AOT_ER_AAC_LTP) ||
390 (aot == AOT_ER_AAC_SCAL) || (aot == AOT_ER_AAC_LD))
391 {
392 FDKwriteBits( asc, (config->flags & CC_VCB11) ? 1 : 0, 1 ); /* aacSectionDataResillienceFlag */
393 FDKwriteBits( asc, (config->flags & CC_RVLC) ? 1 : 0, 1 ); /* aacScaleFactorDataResillienceFlag */
394 FDKwriteBits( asc, (config->flags & CC_HCR) ? 1 : 0, 1 ); /* aacSpectralDataResillienceFlag */
395 }
396 FDKwriteBits( asc, 0, 1 ); /* extensionFlag3: reserved. Shall be '0' */
397 }
398 return 0;
399 }
400 #endif /* TP_GA_ENABLE */
401
402 #ifdef TP_ELD_ENABLE
403
404 static
transportEnc_writeELDSpecificConfig(HANDLE_FDK_BITSTREAM hBs,CODER_CONFIG * config,int epConfig,CSTpCallBacks * cb)405 int transportEnc_writeELDSpecificConfig(
406 HANDLE_FDK_BITSTREAM hBs,
407 CODER_CONFIG *config,
408 int epConfig,
409 CSTpCallBacks *cb
410 )
411 {
412 /* ELD specific config */
413 if (config->channelMode == MODE_1_1) {
414 return -1;
415 }
416 FDKwriteBits(hBs, (config->samplesPerFrame == 480) ? 1 : 0, 1);
417
418 FDKwriteBits(hBs, (config->flags & CC_VCB11 ) ? 1:0, 1);
419 FDKwriteBits(hBs, (config->flags & CC_RVLC ) ? 1:0, 1);
420 FDKwriteBits(hBs, (config->flags & CC_HCR ) ? 1:0, 1);
421
422 FDKwriteBits(hBs, (config->flags & CC_SBR) ? 1:0, 1); /* SBR header flag */
423 if ( (config->flags & CC_SBR) ) {
424 FDKwriteBits(hBs, (config->samplingRate == config->extSamplingRate) ? 0:1, 1); /* Samplerate Flag */
425 FDKwriteBits(hBs, (config->flags & CC_SBRCRC) ? 1:0, 1); /* SBR CRC flag*/
426
427 if (cb->cbSbr != NULL) {
428 const PCE_CONFIGURATION *pPce;
429 int e;
430
431 pPce = getPceEntry(config->channelMode);
432
433 for (e=0; e<PCE_MAX_ELEMENTS && pPce->el_list[e] != ID_NONE; e++ ) {
434 if ( (pPce->el_list[e] == ID_SCE) || (pPce->el_list[e] == ID_CPE) ) {
435 cb->cbSbr(cb->cbSbrData, hBs, 0, 0, 0, config->aot, pPce->el_list[e], e);
436 }
437 }
438 }
439 }
440
441 FDKwriteBits(hBs, 0, 4); /* ELDEXT_TERM */
442
443 return 0;
444 }
445 #endif /* TP_ELD_ENABLE */
446
447
transportEnc_writeASC(HANDLE_FDK_BITSTREAM asc,CODER_CONFIG * config,CSTpCallBacks * cb)448 int transportEnc_writeASC (
449 HANDLE_FDK_BITSTREAM asc,
450 CODER_CONFIG *config,
451 CSTpCallBacks *cb
452 )
453 {
454 UINT extFlag = 0;
455 int err;
456 int epConfig = 0;
457
458 /* Required for the PCE. */
459 UINT alignAnchor = FDKgetValidBits(asc);
460
461 /* Extension Flag: Shall be 1 for aot = 17,19,20,21,22,23,39 */
462 switch (config->aot) {
463 case AOT_ER_AAC_LC:
464 case AOT_ER_AAC_LTP:
465 case AOT_ER_AAC_SCAL:
466 case AOT_ER_TWIN_VQ:
467 case AOT_ER_BSAC:
468 case AOT_ER_AAC_LD:
469 case AOT_ER_AAC_ELD:
470 case AOT_USAC:
471 extFlag = 1;
472 break;
473 default:
474 break;
475 }
476
477 if (config->extAOT == AOT_SBR || config->extAOT == AOT_PS)
478 writeAot(asc, config->extAOT);
479 else
480 writeAot(asc, config->aot);
481
482 {
483 writeSampleRate(asc, config->samplingRate);
484 }
485
486 /* Try to guess a reasonable channel mode if not given */
487 if (config->channelMode == MODE_INVALID) {
488 config->channelMode = transportEnc_GetChannelMode(config->noChannels);
489 if (config->channelMode == MODE_INVALID)
490 return -1;
491 }
492
493 FDKwriteBits( asc, getChannelConfig(config->channelMode), 4 );
494
495 if (config->extAOT == AOT_SBR || config->extAOT == AOT_PS) {
496 writeSampleRate(asc, config->extSamplingRate);
497 writeAot(asc, config->aot);
498 }
499
500 switch (config->aot) {
501 #ifdef TP_GA_ENABLE
502 case AOT_AAC_MAIN:
503 case AOT_AAC_LC:
504 case AOT_AAC_SSR:
505 case AOT_AAC_LTP:
506 case AOT_AAC_SCAL:
507 case AOT_TWIN_VQ:
508 case AOT_ER_AAC_LC:
509 case AOT_ER_AAC_LTP:
510 case AOT_ER_AAC_SCAL:
511 case AOT_ER_TWIN_VQ:
512 case AOT_ER_BSAC:
513 case AOT_ER_AAC_LD:
514 err = transportEnc_writeGASpecificConfig(asc, config, extFlag, alignAnchor);
515 if (err)
516 return err;
517 break;
518 #endif /* TP_GA_ENABLE */
519 #ifdef TP_ELD_ENABLE
520 case AOT_ER_AAC_ELD:
521 err = transportEnc_writeELDSpecificConfig(asc, config, epConfig, cb);
522 if (err)
523 return err;
524 break;
525 #endif /* TP_ELD_ENABLE */
526 default:
527 return -1;
528 }
529
530 switch (config->aot) {
531 case AOT_ER_AAC_LC:
532 case AOT_ER_AAC_LTP:
533 case AOT_ER_AAC_SCAL:
534 case AOT_ER_TWIN_VQ:
535 case AOT_ER_BSAC:
536 case AOT_ER_AAC_LD:
537 case AOT_ER_CELP:
538 case AOT_ER_HVXC:
539 case AOT_ER_HILN:
540 case AOT_ER_PARA:
541 case AOT_ER_AAC_ELD:
542 FDKwriteBits( asc, 0, 2 ); /* epconfig 0 */
543 break;
544 default:
545 break;
546 }
547
548 /* Make sure all bits are sync'ed */
549 FDKsyncCache( asc );
550
551 return 0;
552 }
553