1
2 /* -----------------------------------------------------------------------------------------------------------
3 Software License for The Fraunhofer FDK AAC Codec Library for Android
4
5 � Copyright 1995 - 2015 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 /*!
85 \file
86 \brief SBR bit writing routines
87 */
88
89
90 #include "bit_sbr.h"
91
92 #include "code_env.h"
93 #include "cmondata.h"
94 #include "sbr.h"
95
96 #include "ps_main.h"
97
98 typedef enum {
99 SBR_ID_SCE = 1,
100 SBR_ID_CPE
101 } SBR_ELEMENT_TYPE;
102
103
104 static INT encodeSbrData (HANDLE_SBR_ENV_DATA sbrEnvDataLeft,
105 HANDLE_SBR_ENV_DATA sbrEnvDataRight,
106 HANDLE_PARAMETRIC_STEREO hParametricStereo,
107 HANDLE_COMMON_DATA cmonData,
108 SBR_ELEMENT_TYPE sbrElem,
109 INT coupling,
110 UINT sbrSyntaxFlags);
111
112 static INT encodeSbrHeader (HANDLE_SBR_HEADER_DATA sbrHeaderData,
113 HANDLE_SBR_BITSTREAM_DATA sbrBitstreamData,
114 HANDLE_COMMON_DATA cmonData);
115
116
117 static INT encodeSbrHeaderData (HANDLE_SBR_HEADER_DATA sbrHeaderData,
118 HANDLE_FDK_BITSTREAM hBitStream);
119
120 static INT encodeSbrSingleChannelElement (HANDLE_SBR_ENV_DATA sbrEnvData,
121 HANDLE_FDK_BITSTREAM hBitStream
122 ,HANDLE_PARAMETRIC_STEREO hParametricStereo
123 ,UINT sbrSyntaxFlags
124 );
125
126
127
128 static INT encodeSbrChannelPairElement (HANDLE_SBR_ENV_DATA sbrEnvDataLeft,
129 HANDLE_SBR_ENV_DATA sbrEnvDataRight,
130 HANDLE_PARAMETRIC_STEREO hParametricStereo,
131 HANDLE_FDK_BITSTREAM hBitStream,
132 INT coupling);
133
134
135 static INT encodeSbrGrid (HANDLE_SBR_ENV_DATA sbrEnvData,
136 HANDLE_FDK_BITSTREAM hBitStream);
137
138 static int encodeLowDelaySbrGrid ( HANDLE_SBR_ENV_DATA sbrEnvData,
139 HANDLE_FDK_BITSTREAM hBitStream,
140 int transmitFreqs);
141
142 static INT encodeSbrDtdf (HANDLE_SBR_ENV_DATA sbrEnvData,
143 HANDLE_FDK_BITSTREAM hBitStream);
144
145 static INT writeNoiseLevelData (HANDLE_SBR_ENV_DATA sbrEnvData,
146 HANDLE_FDK_BITSTREAM hBitStream,
147 INT coupling);
148
149 static INT writeEnvelopeData (HANDLE_SBR_ENV_DATA sbrEnvData,
150 HANDLE_FDK_BITSTREAM hBitStream,
151 INT coupling);
152
153 static INT writeSyntheticCodingData (HANDLE_SBR_ENV_DATA sbrEnvData,
154 HANDLE_FDK_BITSTREAM hBitStream);
155
156
157 static INT encodeExtendedData (HANDLE_PARAMETRIC_STEREO hParametricStereo,
158 HANDLE_FDK_BITSTREAM hBitStream);
159
160
161
162 static INT getSbrExtendedDataSize (HANDLE_PARAMETRIC_STEREO hParametricStereo);
163
164 /*****************************************************************************
165
166 functionname: FDKsbrEnc_WriteEnvSingleChannelElement
167 description: writes pure SBR single channel data element
168 returns: number of bits written
169 input:
170 output:
171
172 *****************************************************************************/
173 INT
FDKsbrEnc_WriteEnvSingleChannelElement(HANDLE_SBR_HEADER_DATA sbrHeaderData,HANDLE_PARAMETRIC_STEREO hParametricStereo,HANDLE_SBR_BITSTREAM_DATA sbrBitstreamData,HANDLE_SBR_ENV_DATA sbrEnvData,HANDLE_COMMON_DATA cmonData,UINT sbrSyntaxFlags)174 FDKsbrEnc_WriteEnvSingleChannelElement(
175 HANDLE_SBR_HEADER_DATA sbrHeaderData,
176 HANDLE_PARAMETRIC_STEREO hParametricStereo,
177 HANDLE_SBR_BITSTREAM_DATA sbrBitstreamData,
178 HANDLE_SBR_ENV_DATA sbrEnvData,
179 HANDLE_COMMON_DATA cmonData,
180 UINT sbrSyntaxFlags
181 )
182
183 {
184 INT payloadBits = 0;
185
186 cmonData->sbrHdrBits = 0;
187 cmonData->sbrDataBits = 0;
188
189 /* write pure sbr data */
190 if (sbrEnvData != NULL) {
191
192 /* write header */
193 payloadBits += encodeSbrHeader (sbrHeaderData,
194 sbrBitstreamData,
195 cmonData);
196
197
198 /* write data */
199 payloadBits += encodeSbrData (sbrEnvData,
200 NULL,
201 hParametricStereo,
202 cmonData,
203 SBR_ID_SCE,
204 0,
205 sbrSyntaxFlags);
206
207 }
208 return payloadBits;
209 }
210
211 /*****************************************************************************
212
213 functionname: FDKsbrEnc_WriteEnvChannelPairElement
214 description: writes pure SBR channel pair data element
215 returns: number of bits written
216 input:
217 output:
218
219 *****************************************************************************/
220 INT
FDKsbrEnc_WriteEnvChannelPairElement(HANDLE_SBR_HEADER_DATA sbrHeaderData,HANDLE_PARAMETRIC_STEREO hParametricStereo,HANDLE_SBR_BITSTREAM_DATA sbrBitstreamData,HANDLE_SBR_ENV_DATA sbrEnvDataLeft,HANDLE_SBR_ENV_DATA sbrEnvDataRight,HANDLE_COMMON_DATA cmonData,UINT sbrSyntaxFlags)221 FDKsbrEnc_WriteEnvChannelPairElement (HANDLE_SBR_HEADER_DATA sbrHeaderData,
222 HANDLE_PARAMETRIC_STEREO hParametricStereo,
223 HANDLE_SBR_BITSTREAM_DATA sbrBitstreamData,
224 HANDLE_SBR_ENV_DATA sbrEnvDataLeft,
225 HANDLE_SBR_ENV_DATA sbrEnvDataRight,
226 HANDLE_COMMON_DATA cmonData,
227 UINT sbrSyntaxFlags)
228
229 {
230 INT payloadBits = 0;
231 cmonData->sbrHdrBits = 0;
232 cmonData->sbrDataBits = 0;
233
234 /* write pure sbr data */
235 if ((sbrEnvDataLeft != NULL) && (sbrEnvDataRight != NULL)) {
236
237 /* write header */
238 payloadBits += encodeSbrHeader (sbrHeaderData,
239 sbrBitstreamData,
240 cmonData);
241
242 /* write data */
243 payloadBits += encodeSbrData (sbrEnvDataLeft,
244 sbrEnvDataRight,
245 hParametricStereo,
246 cmonData,
247 SBR_ID_CPE,
248 sbrHeaderData->coupling,
249 sbrSyntaxFlags);
250
251 }
252 return payloadBits;
253 }
254
255 INT
FDKsbrEnc_CountSbrChannelPairElement(HANDLE_SBR_HEADER_DATA sbrHeaderData,HANDLE_PARAMETRIC_STEREO hParametricStereo,HANDLE_SBR_BITSTREAM_DATA sbrBitstreamData,HANDLE_SBR_ENV_DATA sbrEnvDataLeft,HANDLE_SBR_ENV_DATA sbrEnvDataRight,HANDLE_COMMON_DATA cmonData,UINT sbrSyntaxFlags)256 FDKsbrEnc_CountSbrChannelPairElement (HANDLE_SBR_HEADER_DATA sbrHeaderData,
257 HANDLE_PARAMETRIC_STEREO hParametricStereo,
258 HANDLE_SBR_BITSTREAM_DATA sbrBitstreamData,
259 HANDLE_SBR_ENV_DATA sbrEnvDataLeft,
260 HANDLE_SBR_ENV_DATA sbrEnvDataRight,
261 HANDLE_COMMON_DATA cmonData,
262 UINT sbrSyntaxFlags)
263 {
264 INT payloadBits;
265 INT bitPos = FDKgetValidBits(&cmonData->sbrBitbuf);
266
267 payloadBits = FDKsbrEnc_WriteEnvChannelPairElement(sbrHeaderData,
268 hParametricStereo,
269 sbrBitstreamData,
270 sbrEnvDataLeft,
271 sbrEnvDataRight,
272 cmonData,
273 sbrSyntaxFlags);
274
275 FDKpushBack(&cmonData->sbrBitbuf, (FDKgetValidBits(&cmonData->sbrBitbuf) - bitPos) );
276
277 return payloadBits;
278 }
279
280
sbrEncoder_GetHeader(SBR_ENCODER * sbrEncoder,HANDLE_FDK_BITSTREAM hBs,INT element_index,int fSendHeaders)281 void sbrEncoder_GetHeader(SBR_ENCODER *sbrEncoder,
282 HANDLE_FDK_BITSTREAM hBs,
283 INT element_index,
284 int fSendHeaders)
285 {
286 encodeSbrHeaderData (&sbrEncoder->sbrElement[element_index]->sbrHeaderData, hBs);
287
288 if (fSendHeaders == 0) {
289 /* Prevent header being embedded into the SBR payload. */
290 sbrEncoder->sbrElement[element_index]->sbrBitstreamData.NrSendHeaderData = -1;
291 sbrEncoder->sbrElement[element_index]->sbrBitstreamData.HeaderActive = 0;
292 sbrEncoder->sbrElement[element_index]->sbrBitstreamData.CountSendHeaderData = -1;
293 }
294 }
295
296
297 /*****************************************************************************
298
299 functionname: encodeSbrHeader
300 description: encodes SBR Header information
301 returns: number of bits written
302 input:
303 output:
304
305 *****************************************************************************/
306 static INT
encodeSbrHeader(HANDLE_SBR_HEADER_DATA sbrHeaderData,HANDLE_SBR_BITSTREAM_DATA sbrBitstreamData,HANDLE_COMMON_DATA cmonData)307 encodeSbrHeader (HANDLE_SBR_HEADER_DATA sbrHeaderData,
308 HANDLE_SBR_BITSTREAM_DATA sbrBitstreamData,
309 HANDLE_COMMON_DATA cmonData)
310 {
311 INT payloadBits = 0;
312
313 if (sbrBitstreamData->HeaderActive) {
314 payloadBits += FDKwriteBits (&cmonData->sbrBitbuf, 1, 1);
315 payloadBits += encodeSbrHeaderData (sbrHeaderData,
316 &cmonData->sbrBitbuf);
317 }
318 else {
319 payloadBits += FDKwriteBits (&cmonData->sbrBitbuf, 0, 1);
320 }
321
322 cmonData->sbrHdrBits = payloadBits;
323
324 return payloadBits;
325 }
326
327
328
329 /*****************************************************************************
330
331 functionname: encodeSbrHeaderData
332 description: writes sbr_header()
333 bs_protocol_version through bs_header_extra_2
334 returns: number of bits written
335 input:
336 output:
337
338 *****************************************************************************/
339 static INT
encodeSbrHeaderData(HANDLE_SBR_HEADER_DATA sbrHeaderData,HANDLE_FDK_BITSTREAM hBitStream)340 encodeSbrHeaderData (HANDLE_SBR_HEADER_DATA sbrHeaderData,
341 HANDLE_FDK_BITSTREAM hBitStream)
342
343 {
344 INT payloadBits = 0;
345 if (sbrHeaderData != NULL) {
346 payloadBits += FDKwriteBits (hBitStream, sbrHeaderData->sbr_amp_res,
347 SI_SBR_AMP_RES_BITS);
348 payloadBits += FDKwriteBits (hBitStream, sbrHeaderData->sbr_start_frequency,
349 SI_SBR_START_FREQ_BITS);
350 payloadBits += FDKwriteBits (hBitStream, sbrHeaderData->sbr_stop_frequency,
351 SI_SBR_STOP_FREQ_BITS);
352 payloadBits += FDKwriteBits (hBitStream, sbrHeaderData->sbr_xover_band,
353 SI_SBR_XOVER_BAND_BITS);
354
355 payloadBits += FDKwriteBits (hBitStream, 0,
356 SI_SBR_RESERVED_BITS);
357
358 payloadBits += FDKwriteBits (hBitStream, sbrHeaderData->header_extra_1,
359 SI_SBR_HEADER_EXTRA_1_BITS);
360 payloadBits += FDKwriteBits (hBitStream, sbrHeaderData->header_extra_2,
361 SI_SBR_HEADER_EXTRA_2_BITS);
362
363
364 if (sbrHeaderData->header_extra_1) {
365 payloadBits += FDKwriteBits (hBitStream, sbrHeaderData->freqScale,
366 SI_SBR_FREQ_SCALE_BITS);
367 payloadBits += FDKwriteBits (hBitStream, sbrHeaderData->alterScale,
368 SI_SBR_ALTER_SCALE_BITS);
369 payloadBits += FDKwriteBits (hBitStream, sbrHeaderData->sbr_noise_bands,
370 SI_SBR_NOISE_BANDS_BITS);
371 } /* sbrHeaderData->header_extra_1 */
372
373 if (sbrHeaderData->header_extra_2) {
374 payloadBits += FDKwriteBits (hBitStream, sbrHeaderData->sbr_limiter_bands,
375 SI_SBR_LIMITER_BANDS_BITS);
376 payloadBits += FDKwriteBits (hBitStream, sbrHeaderData->sbr_limiter_gains,
377 SI_SBR_LIMITER_GAINS_BITS);
378 payloadBits += FDKwriteBits (hBitStream, sbrHeaderData->sbr_interpol_freq,
379 SI_SBR_INTERPOL_FREQ_BITS);
380 payloadBits += FDKwriteBits (hBitStream, sbrHeaderData->sbr_smoothing_length,
381 SI_SBR_SMOOTHING_LENGTH_BITS);
382
383 } /* sbrHeaderData->header_extra_2 */
384 } /* sbrHeaderData != NULL */
385
386 return payloadBits;
387 }
388
389
390 /*****************************************************************************
391
392 functionname: encodeSbrData
393 description: encodes sbr Data information
394 returns: number of bits written
395 input:
396 output:
397
398 *****************************************************************************/
399 static INT
encodeSbrData(HANDLE_SBR_ENV_DATA sbrEnvDataLeft,HANDLE_SBR_ENV_DATA sbrEnvDataRight,HANDLE_PARAMETRIC_STEREO hParametricStereo,HANDLE_COMMON_DATA cmonData,SBR_ELEMENT_TYPE sbrElem,INT coupling,UINT sbrSyntaxFlags)400 encodeSbrData (HANDLE_SBR_ENV_DATA sbrEnvDataLeft,
401 HANDLE_SBR_ENV_DATA sbrEnvDataRight,
402 HANDLE_PARAMETRIC_STEREO hParametricStereo,
403 HANDLE_COMMON_DATA cmonData,
404 SBR_ELEMENT_TYPE sbrElem,
405 INT coupling,
406 UINT sbrSyntaxFlags)
407 {
408 INT payloadBits = 0;
409
410 switch (sbrElem) {
411 case SBR_ID_SCE:
412 payloadBits += encodeSbrSingleChannelElement (sbrEnvDataLeft, &cmonData->sbrBitbuf, hParametricStereo, sbrSyntaxFlags);
413 break;
414 case SBR_ID_CPE:
415 payloadBits += encodeSbrChannelPairElement (sbrEnvDataLeft, sbrEnvDataRight, hParametricStereo, &cmonData->sbrBitbuf, coupling);
416 break;
417 default:
418 /* we never should apply SBR to any other element type */
419 FDK_ASSERT (0);
420 }
421
422 cmonData->sbrDataBits = payloadBits;
423
424 return payloadBits;
425 }
426
427 #define MODE_FREQ_TANS 1
428 #define MODE_NO_FREQ_TRAN 0
429 #define LD_TRANSMISSION MODE_FREQ_TANS
encodeFreqs(int mode)430 static int encodeFreqs (int mode) {
431 return ((mode & MODE_FREQ_TANS) ? 1 : 0);
432 }
433
434
435 /*****************************************************************************
436
437 functionname: encodeSbrSingleChannelElement
438 description: encodes sbr SCE information
439 returns: number of bits written
440 input:
441 output:
442
443 *****************************************************************************/
444 static INT
encodeSbrSingleChannelElement(HANDLE_SBR_ENV_DATA sbrEnvData,HANDLE_FDK_BITSTREAM hBitStream,HANDLE_PARAMETRIC_STEREO hParametricStereo,UINT sbrSyntaxFlags)445 encodeSbrSingleChannelElement (HANDLE_SBR_ENV_DATA sbrEnvData,
446 HANDLE_FDK_BITSTREAM hBitStream
447 ,HANDLE_PARAMETRIC_STEREO hParametricStereo
448 ,UINT sbrSyntaxFlags
449 )
450 {
451 INT i, payloadBits = 0;
452
453 payloadBits += FDKwriteBits (hBitStream, 0, SI_SBR_DATA_EXTRA_BITS); /* no reserved bits */
454
455 if (sbrEnvData->ldGrid) {
456 if ( sbrEnvData->hSbrBSGrid->frameClass != FIXFIXonly ) {
457 /* encode normal SbrGrid */
458 payloadBits += encodeSbrGrid (sbrEnvData, hBitStream);
459 } else {
460 /* use FIXFIXonly frame Grid */
461 payloadBits += encodeLowDelaySbrGrid ( sbrEnvData, hBitStream, encodeFreqs(LD_TRANSMISSION));
462 }
463 }
464 else
465 {
466 if (sbrSyntaxFlags & SBR_SYNTAX_SCALABLE) {
467 payloadBits += FDKwriteBits (hBitStream, 1, SI_SBR_COUPLING_BITS);
468 }
469 payloadBits += encodeSbrGrid (sbrEnvData, hBitStream);
470 }
471
472 payloadBits += encodeSbrDtdf (sbrEnvData, hBitStream);
473
474 for (i = 0; i < sbrEnvData->noOfnoisebands; i++) {
475 payloadBits += FDKwriteBits (hBitStream, sbrEnvData->sbr_invf_mode_vec[i], SI_SBR_INVF_MODE_BITS);
476 }
477
478 payloadBits += writeEnvelopeData (sbrEnvData, hBitStream, 0);
479 payloadBits += writeNoiseLevelData (sbrEnvData, hBitStream, 0);
480
481 payloadBits += writeSyntheticCodingData (sbrEnvData,hBitStream);
482
483 payloadBits += encodeExtendedData(hParametricStereo, hBitStream);
484
485 return payloadBits;
486 }
487
488
489 /*****************************************************************************
490
491 functionname: encodeSbrChannelPairElement
492 description: encodes sbr CPE information
493 returns:
494 input:
495 output:
496
497 *****************************************************************************/
498 static INT
encodeSbrChannelPairElement(HANDLE_SBR_ENV_DATA sbrEnvDataLeft,HANDLE_SBR_ENV_DATA sbrEnvDataRight,HANDLE_PARAMETRIC_STEREO hParametricStereo,HANDLE_FDK_BITSTREAM hBitStream,INT coupling)499 encodeSbrChannelPairElement (HANDLE_SBR_ENV_DATA sbrEnvDataLeft,
500 HANDLE_SBR_ENV_DATA sbrEnvDataRight,
501 HANDLE_PARAMETRIC_STEREO hParametricStereo,
502 HANDLE_FDK_BITSTREAM hBitStream,
503 INT coupling)
504 {
505 INT payloadBits = 0;
506 INT i = 0;
507
508 payloadBits += FDKwriteBits (hBitStream, 0, SI_SBR_DATA_EXTRA_BITS); /* no reserved bits */
509
510 payloadBits += FDKwriteBits (hBitStream, coupling, SI_SBR_COUPLING_BITS);
511
512 if (coupling) {
513 if (sbrEnvDataLeft->ldGrid) {
514 if ( sbrEnvDataLeft->hSbrBSGrid->frameClass != FIXFIXonly ) {
515 /* normal SbrGrid */
516 payloadBits += encodeSbrGrid (sbrEnvDataLeft, hBitStream);
517
518 } else {
519 /* FIXFIXonly frame Grid */
520 payloadBits += encodeLowDelaySbrGrid ( sbrEnvDataLeft, hBitStream, encodeFreqs(LD_TRANSMISSION));
521 }
522 } else
523 payloadBits += encodeSbrGrid (sbrEnvDataLeft, hBitStream);
524
525 payloadBits += encodeSbrDtdf (sbrEnvDataLeft, hBitStream);
526 payloadBits += encodeSbrDtdf (sbrEnvDataRight, hBitStream);
527
528 for (i = 0; i < sbrEnvDataLeft->noOfnoisebands; i++) {
529 payloadBits += FDKwriteBits (hBitStream, sbrEnvDataLeft->sbr_invf_mode_vec[i], SI_SBR_INVF_MODE_BITS);
530 }
531
532 payloadBits += writeEnvelopeData (sbrEnvDataLeft, hBitStream,1);
533 payloadBits += writeNoiseLevelData (sbrEnvDataLeft, hBitStream,1);
534 payloadBits += writeEnvelopeData (sbrEnvDataRight, hBitStream,1);
535 payloadBits += writeNoiseLevelData (sbrEnvDataRight, hBitStream,1);
536
537 payloadBits += writeSyntheticCodingData (sbrEnvDataLeft,hBitStream);
538 payloadBits += writeSyntheticCodingData (sbrEnvDataRight,hBitStream);
539
540 } else { /* no coupling */
541 FDK_ASSERT(sbrEnvDataLeft->ldGrid == sbrEnvDataRight->ldGrid);
542
543 if (sbrEnvDataLeft->ldGrid || sbrEnvDataRight->ldGrid) {
544 /* sbrEnvDataLeft (left channel) */
545 if ( sbrEnvDataLeft->hSbrBSGrid->frameClass != FIXFIXonly) {
546 /* no FIXFIXonly Frame so we dont need encodeLowDelaySbrGrid */
547 /* normal SbrGrid */
548 payloadBits += encodeSbrGrid (sbrEnvDataLeft, hBitStream);
549
550 } else {
551 /* FIXFIXonly frame Grid */
552 payloadBits += encodeLowDelaySbrGrid ( sbrEnvDataLeft, hBitStream, encodeFreqs(LD_TRANSMISSION));
553 }
554
555 /* sbrEnvDataRight (right channel) */
556 if ( sbrEnvDataRight->hSbrBSGrid->frameClass != FIXFIXonly) {
557 /* no FIXFIXonly Frame so we dont need encodeLowDelaySbrGrid */
558 /* normal SbrGrid */
559 payloadBits += encodeSbrGrid (sbrEnvDataRight, hBitStream);
560
561 } else {
562 /* FIXFIXonly frame Grid */
563 payloadBits += encodeLowDelaySbrGrid ( sbrEnvDataRight, hBitStream, encodeFreqs(LD_TRANSMISSION));
564 }
565 } else
566 {
567 payloadBits += encodeSbrGrid (sbrEnvDataLeft, hBitStream);
568 payloadBits += encodeSbrGrid (sbrEnvDataRight, hBitStream);
569 }
570 payloadBits += encodeSbrDtdf (sbrEnvDataLeft, hBitStream);
571 payloadBits += encodeSbrDtdf (sbrEnvDataRight, hBitStream);
572
573 for (i = 0; i < sbrEnvDataLeft->noOfnoisebands; i++) {
574 payloadBits += FDKwriteBits (hBitStream, sbrEnvDataLeft->sbr_invf_mode_vec[i],
575 SI_SBR_INVF_MODE_BITS);
576 }
577 for (i = 0; i < sbrEnvDataRight->noOfnoisebands; i++) {
578 payloadBits += FDKwriteBits (hBitStream, sbrEnvDataRight->sbr_invf_mode_vec[i],
579 SI_SBR_INVF_MODE_BITS);
580 }
581
582 payloadBits += writeEnvelopeData (sbrEnvDataLeft, hBitStream,0);
583 payloadBits += writeEnvelopeData (sbrEnvDataRight, hBitStream,0);
584 payloadBits += writeNoiseLevelData (sbrEnvDataLeft, hBitStream,0);
585 payloadBits += writeNoiseLevelData (sbrEnvDataRight, hBitStream,0);
586
587 payloadBits += writeSyntheticCodingData (sbrEnvDataLeft,hBitStream);
588 payloadBits += writeSyntheticCodingData (sbrEnvDataRight,hBitStream);
589
590 } /* coupling */
591
592 payloadBits += encodeExtendedData(hParametricStereo, hBitStream);
593
594 return payloadBits;
595 }
596
ceil_ln2(INT x)597 static INT ceil_ln2(INT x)
598 {
599 INT tmp=-1;
600 while((1<<++tmp) < x);
601 return(tmp);
602 }
603
604
605 /*****************************************************************************
606
607 functionname: encodeSbrGrid
608 description: if hBitStream != NULL writes bits that describes the
609 time/frequency grouping of a frame; else counts them only
610 returns: number of bits written or counted
611 input:
612 output:
613
614 *****************************************************************************/
615 static INT
encodeSbrGrid(HANDLE_SBR_ENV_DATA sbrEnvData,HANDLE_FDK_BITSTREAM hBitStream)616 encodeSbrGrid (HANDLE_SBR_ENV_DATA sbrEnvData, HANDLE_FDK_BITSTREAM hBitStream)
617 {
618 INT payloadBits = 0;
619 INT i, temp;
620 INT bufferFrameStart = sbrEnvData->hSbrBSGrid->bufferFrameStart;
621 INT numberTimeSlots = sbrEnvData->hSbrBSGrid->numberTimeSlots;
622
623 if (sbrEnvData->ldGrid)
624 payloadBits += FDKwriteBits (hBitStream,
625 sbrEnvData->hSbrBSGrid->frameClass,
626 SBR_CLA_BITS_LD);
627 else
628 payloadBits += FDKwriteBits (hBitStream,
629 sbrEnvData->hSbrBSGrid->frameClass,
630 SBR_CLA_BITS);
631
632 switch (sbrEnvData->hSbrBSGrid->frameClass) {
633 case FIXFIXonly:
634 FDK_ASSERT(0 /* Fatal error in encodeSbrGrid! */);
635 break;
636 case FIXFIX:
637 temp = ceil_ln2(sbrEnvData->hSbrBSGrid->bs_num_env);
638 payloadBits += FDKwriteBits (hBitStream, temp, SBR_ENV_BITS);
639 if ((sbrEnvData->ldGrid) && (sbrEnvData->hSbrBSGrid->bs_num_env==1))
640 payloadBits += FDKwriteBits(hBitStream, sbrEnvData->currentAmpResFF, SI_SBR_AMP_RES_BITS);
641 payloadBits += FDKwriteBits (hBitStream, sbrEnvData->hSbrBSGrid->v_f[0], SBR_RES_BITS);
642
643 break;
644
645 case FIXVAR:
646 case VARFIX:
647 if (sbrEnvData->hSbrBSGrid->frameClass == FIXVAR)
648 temp = sbrEnvData->hSbrBSGrid->bs_abs_bord - (bufferFrameStart + numberTimeSlots);
649 else
650 temp = sbrEnvData->hSbrBSGrid->bs_abs_bord - bufferFrameStart;
651
652 payloadBits += FDKwriteBits (hBitStream, temp, SBR_ABS_BITS);
653 payloadBits += FDKwriteBits (hBitStream, sbrEnvData->hSbrBSGrid->n, SBR_NUM_BITS);
654
655 for (i = 0; i < sbrEnvData->hSbrBSGrid->n; i++) {
656 temp = (sbrEnvData->hSbrBSGrid->bs_rel_bord[i] - 2) >> 1;
657 payloadBits += FDKwriteBits (hBitStream, temp, SBR_REL_BITS);
658 }
659
660 temp = ceil_ln2(sbrEnvData->hSbrBSGrid->n + 2);
661 payloadBits += FDKwriteBits (hBitStream, sbrEnvData->hSbrBSGrid->p, temp);
662
663 for (i = 0; i < sbrEnvData->hSbrBSGrid->n + 1; i++) {
664 payloadBits += FDKwriteBits (hBitStream, sbrEnvData->hSbrBSGrid->v_f[i],
665 SBR_RES_BITS);
666 }
667 break;
668
669 case VARVAR:
670 temp = sbrEnvData->hSbrBSGrid->bs_abs_bord_0 - bufferFrameStart;
671 payloadBits += FDKwriteBits (hBitStream, temp, SBR_ABS_BITS);
672 temp = sbrEnvData->hSbrBSGrid->bs_abs_bord_1 - (bufferFrameStart + numberTimeSlots);
673 payloadBits += FDKwriteBits (hBitStream, temp, SBR_ABS_BITS);
674
675 payloadBits += FDKwriteBits (hBitStream, sbrEnvData->hSbrBSGrid->bs_num_rel_0, SBR_NUM_BITS);
676 payloadBits += FDKwriteBits (hBitStream, sbrEnvData->hSbrBSGrid->bs_num_rel_1, SBR_NUM_BITS);
677
678 for (i = 0; i < sbrEnvData->hSbrBSGrid->bs_num_rel_0; i++) {
679 temp = (sbrEnvData->hSbrBSGrid->bs_rel_bord_0[i] - 2) >> 1;
680 payloadBits += FDKwriteBits (hBitStream, temp, SBR_REL_BITS);
681 }
682
683 for (i = 0; i < sbrEnvData->hSbrBSGrid->bs_num_rel_1; i++) {
684 temp = (sbrEnvData->hSbrBSGrid->bs_rel_bord_1[i] - 2) >> 1;
685 payloadBits += FDKwriteBits (hBitStream, temp, SBR_REL_BITS);
686 }
687
688 temp = ceil_ln2(sbrEnvData->hSbrBSGrid->bs_num_rel_0 +
689 sbrEnvData->hSbrBSGrid->bs_num_rel_1 + 2);
690 payloadBits += FDKwriteBits (hBitStream, sbrEnvData->hSbrBSGrid->p, temp);
691
692 temp = sbrEnvData->hSbrBSGrid->bs_num_rel_0 +
693 sbrEnvData->hSbrBSGrid->bs_num_rel_1 + 1;
694
695 for (i = 0; i < temp; i++) {
696 payloadBits += FDKwriteBits (hBitStream, sbrEnvData->hSbrBSGrid->v_fLR[i],
697 SBR_RES_BITS);
698 }
699 break;
700 }
701
702 return payloadBits;
703 }
704
705 #define SBR_CLA_BITS_LD 1
706 /*****************************************************************************
707
708 functionname: encodeLowDelaySbrGrid
709 description: if hBitStream != NULL writes bits that describes the
710 time/frequency grouping of a frame;
711 else counts them only
712 (this function only write the FIXFIXonly Bitstream data)
713 returns: number of bits written or counted
714 input:
715 output:
716
717 *****************************************************************************/
718 static int
encodeLowDelaySbrGrid(HANDLE_SBR_ENV_DATA sbrEnvData,HANDLE_FDK_BITSTREAM hBitStream,int transmitFreqs)719 encodeLowDelaySbrGrid ( HANDLE_SBR_ENV_DATA sbrEnvData,
720 HANDLE_FDK_BITSTREAM hBitStream,
721 int transmitFreqs
722 )
723 {
724 int payloadBits = 0;
725 int i;
726
727 /* write FIXFIXonly Grid */
728 /* write frameClass [1 bit] for FIXFIXonly Grid */
729 payloadBits += FDKwriteBits(hBitStream, 1, SBR_CLA_BITS_LD);
730
731 /* absolute Borders are fix: 0,X,X,X,nTimeSlots; so we dont have to transmit them */
732 /* only transmit the transient position! */
733 /* with this info (b1) we can reconstruct the Frame on Decoder side : */
734 /* border[0] = 0; border[1] = b1; border[2]=b1+2; border[3] = nrTimeSlots */
735
736 /* use 3 or 4bits for transient border (border) */
737 if (sbrEnvData->hSbrBSGrid->numberTimeSlots == 8)
738 payloadBits += FDKwriteBits ( hBitStream, sbrEnvData->hSbrBSGrid->bs_abs_bord, 3);
739 else
740 payloadBits += FDKwriteBits ( hBitStream, sbrEnvData->hSbrBSGrid->bs_abs_bord, 4);
741
742 if (transmitFreqs) {
743 /* write FreqRes grid */
744 for (i = 0; i < sbrEnvData->hSbrBSGrid->bs_num_env; i++) {
745 payloadBits += FDKwriteBits (hBitStream, sbrEnvData->hSbrBSGrid->v_f[i], SBR_RES_BITS);
746 }
747 }
748
749 return payloadBits;
750 }
751
752 /*****************************************************************************
753
754 functionname: encodeSbrDtdf
755 description: writes bits that describes the direction of the envelopes of a frame
756 returns: number of bits written
757 input:
758 output:
759
760 *****************************************************************************/
761 static INT
encodeSbrDtdf(HANDLE_SBR_ENV_DATA sbrEnvData,HANDLE_FDK_BITSTREAM hBitStream)762 encodeSbrDtdf (HANDLE_SBR_ENV_DATA sbrEnvData, HANDLE_FDK_BITSTREAM hBitStream)
763 {
764 INT i, payloadBits = 0, noOfNoiseEnvelopes;
765
766 noOfNoiseEnvelopes = sbrEnvData->noOfEnvelopes > 1 ? 2 : 1;
767
768 for (i = 0; i < sbrEnvData->noOfEnvelopes; ++i) {
769 payloadBits += FDKwriteBits (hBitStream, sbrEnvData->domain_vec[i], SBR_DIR_BITS);
770 }
771 for (i = 0; i < noOfNoiseEnvelopes; ++i) {
772 payloadBits += FDKwriteBits (hBitStream, sbrEnvData->domain_vec_noise[i], SBR_DIR_BITS);
773 }
774
775 return payloadBits;
776 }
777
778
779 /*****************************************************************************
780
781 functionname: writeNoiseLevelData
782 description: writes bits corresponding to the noise-floor-level
783 returns: number of bits written
784 input:
785 output:
786
787 *****************************************************************************/
788 static INT
writeNoiseLevelData(HANDLE_SBR_ENV_DATA sbrEnvData,HANDLE_FDK_BITSTREAM hBitStream,INT coupling)789 writeNoiseLevelData (HANDLE_SBR_ENV_DATA sbrEnvData, HANDLE_FDK_BITSTREAM hBitStream, INT coupling)
790 {
791 INT j, i, payloadBits = 0;
792 INT nNoiseEnvelopes = sbrEnvData->noOfEnvelopes > 1 ? 2 : 1;
793
794 for (i = 0; i < nNoiseEnvelopes; i++) {
795 switch (sbrEnvData->domain_vec_noise[i]) {
796 case FREQ:
797 if (coupling && sbrEnvData->balance) {
798 payloadBits += FDKwriteBits (hBitStream,
799 sbrEnvData->sbr_noise_levels[i * sbrEnvData->noOfnoisebands],
800 sbrEnvData->si_sbr_start_noise_bits_balance);
801 } else {
802 payloadBits += FDKwriteBits (hBitStream,
803 sbrEnvData->sbr_noise_levels[i * sbrEnvData->noOfnoisebands],
804 sbrEnvData->si_sbr_start_noise_bits);
805 }
806
807 for (j = 1 + i * sbrEnvData->noOfnoisebands; j < (sbrEnvData->noOfnoisebands * (1 + i)); j++) {
808 if (coupling) {
809 if (sbrEnvData->balance) {
810 /* coupling && balance */
811 payloadBits += FDKwriteBits (hBitStream,
812 sbrEnvData->hufftableNoiseBalanceFreqC[sbrEnvData->sbr_noise_levels[j] +
813 CODE_BOOK_SCF_LAV_BALANCE11],
814 sbrEnvData->hufftableNoiseBalanceFreqL[sbrEnvData->sbr_noise_levels[j] +
815 CODE_BOOK_SCF_LAV_BALANCE11]);
816 } else {
817 /* coupling && !balance */
818 payloadBits += FDKwriteBits (hBitStream,
819 sbrEnvData->hufftableNoiseLevelFreqC[sbrEnvData->sbr_noise_levels[j] +
820 CODE_BOOK_SCF_LAV11],
821 sbrEnvData->hufftableNoiseLevelFreqL[sbrEnvData->sbr_noise_levels[j] +
822 CODE_BOOK_SCF_LAV11]);
823 }
824 } else {
825 /* !coupling */
826 payloadBits += FDKwriteBits (hBitStream,
827 sbrEnvData->hufftableNoiseFreqC[sbrEnvData->sbr_noise_levels[j] +
828 CODE_BOOK_SCF_LAV11],
829 sbrEnvData->hufftableNoiseFreqL[sbrEnvData->sbr_noise_levels[j] +
830 CODE_BOOK_SCF_LAV11]);
831 }
832 }
833 break;
834
835 case TIME:
836 for (j = i * sbrEnvData->noOfnoisebands; j < (sbrEnvData->noOfnoisebands * (1 + i)); j++) {
837 if (coupling) {
838 if (sbrEnvData->balance) {
839 /* coupling && balance */
840 payloadBits += FDKwriteBits (hBitStream,
841 sbrEnvData->hufftableNoiseBalanceTimeC[sbrEnvData->sbr_noise_levels[j] +
842 CODE_BOOK_SCF_LAV_BALANCE11],
843 sbrEnvData->hufftableNoiseBalanceTimeL[sbrEnvData->sbr_noise_levels[j] +
844 CODE_BOOK_SCF_LAV_BALANCE11]);
845 } else {
846 /* coupling && !balance */
847 payloadBits += FDKwriteBits (hBitStream,
848 sbrEnvData->hufftableNoiseLevelTimeC[sbrEnvData->sbr_noise_levels[j] +
849 CODE_BOOK_SCF_LAV11],
850 sbrEnvData->hufftableNoiseLevelTimeL[sbrEnvData->sbr_noise_levels[j] +
851 CODE_BOOK_SCF_LAV11]);
852 }
853 } else {
854 /* !coupling */
855 payloadBits += FDKwriteBits (hBitStream,
856 sbrEnvData->hufftableNoiseLevelTimeC[sbrEnvData->sbr_noise_levels[j] +
857 CODE_BOOK_SCF_LAV11],
858 sbrEnvData->hufftableNoiseLevelTimeL[sbrEnvData->sbr_noise_levels[j] +
859 CODE_BOOK_SCF_LAV11]);
860 }
861 }
862 break;
863 }
864 }
865 return payloadBits;
866 }
867
868
869 /*****************************************************************************
870
871 functionname: writeEnvelopeData
872 description: writes bits corresponding to the envelope
873 returns: number of bits written
874 input:
875 output:
876
877 *****************************************************************************/
878 static INT
writeEnvelopeData(HANDLE_SBR_ENV_DATA sbrEnvData,HANDLE_FDK_BITSTREAM hBitStream,INT coupling)879 writeEnvelopeData (HANDLE_SBR_ENV_DATA sbrEnvData, HANDLE_FDK_BITSTREAM hBitStream, INT coupling)
880 {
881 INT payloadBits = 0, j, i, delta;
882
883 for (j = 0; j < sbrEnvData->noOfEnvelopes; j++) { /* loop over all envelopes */
884 if (sbrEnvData->domain_vec[j] == FREQ) {
885 if (coupling && sbrEnvData->balance) {
886 payloadBits += FDKwriteBits (hBitStream, sbrEnvData->ienvelope[j][0], sbrEnvData->si_sbr_start_env_bits_balance);
887 } else {
888 payloadBits += FDKwriteBits (hBitStream, sbrEnvData->ienvelope[j][0], sbrEnvData->si_sbr_start_env_bits);
889 }
890 }
891
892 for (i = 1 - sbrEnvData->domain_vec[j]; i < sbrEnvData->noScfBands[j]; i++) {
893 delta = sbrEnvData->ienvelope[j][i];
894 if (coupling && sbrEnvData->balance) {
895 FDK_ASSERT (fixp_abs (delta) <= sbrEnvData->codeBookScfLavBalance);
896 } else {
897 FDK_ASSERT (fixp_abs (delta) <= sbrEnvData->codeBookScfLav);
898 }
899 if (coupling) {
900 if (sbrEnvData->balance) {
901 if (sbrEnvData->domain_vec[j]) {
902 /* coupling && balance && TIME */
903 payloadBits += FDKwriteBits (hBitStream,
904 sbrEnvData->hufftableBalanceTimeC[delta + sbrEnvData->codeBookScfLavBalance],
905 sbrEnvData->hufftableBalanceTimeL[delta + sbrEnvData->codeBookScfLavBalance]);
906 } else {
907 /* coupling && balance && FREQ */
908 payloadBits += FDKwriteBits (hBitStream,
909 sbrEnvData->hufftableBalanceFreqC[delta + sbrEnvData->codeBookScfLavBalance],
910 sbrEnvData->hufftableBalanceFreqL[delta + sbrEnvData->codeBookScfLavBalance]);
911 }
912 } else {
913 if (sbrEnvData->domain_vec[j]) {
914 /* coupling && !balance && TIME */
915 payloadBits += FDKwriteBits (hBitStream,
916 sbrEnvData->hufftableLevelTimeC[delta + sbrEnvData->codeBookScfLav],
917 sbrEnvData->hufftableLevelTimeL[delta + sbrEnvData->codeBookScfLav]);
918 } else {
919 /* coupling && !balance && FREQ */
920 payloadBits += FDKwriteBits (hBitStream,
921 sbrEnvData->hufftableLevelFreqC[delta + sbrEnvData->codeBookScfLav],
922 sbrEnvData->hufftableLevelFreqL[delta + sbrEnvData->codeBookScfLav]);
923 }
924 }
925 } else {
926 if (sbrEnvData->domain_vec[j]) {
927 /* !coupling && TIME */
928 payloadBits += FDKwriteBits (hBitStream,
929 sbrEnvData->hufftableTimeC[delta + sbrEnvData->codeBookScfLav],
930 sbrEnvData->hufftableTimeL[delta + sbrEnvData->codeBookScfLav]);
931 } else {
932 /* !coupling && FREQ */
933 payloadBits += FDKwriteBits (hBitStream,
934 sbrEnvData->hufftableFreqC[delta + sbrEnvData->codeBookScfLav],
935 sbrEnvData->hufftableFreqL[delta + sbrEnvData->codeBookScfLav]);
936 }
937 }
938 }
939 }
940 return payloadBits;
941 }
942
943
944 /*****************************************************************************
945
946 functionname: encodeExtendedData
947 description: writes bits corresponding to the extended data
948 returns: number of bits written
949 input:
950 output:
951
952 *****************************************************************************/
encodeExtendedData(HANDLE_PARAMETRIC_STEREO hParametricStereo,HANDLE_FDK_BITSTREAM hBitStream)953 static INT encodeExtendedData (HANDLE_PARAMETRIC_STEREO hParametricStereo,
954 HANDLE_FDK_BITSTREAM hBitStream)
955 {
956 INT extDataSize;
957 INT payloadBits = 0;
958
959 extDataSize = getSbrExtendedDataSize(hParametricStereo);
960
961
962 if (extDataSize != 0) {
963 INT maxExtSize = (1<<SI_SBR_EXTENSION_SIZE_BITS) - 1;
964 INT writtenNoBits = 0; /* needed to byte align the extended data */
965
966 payloadBits += FDKwriteBits (hBitStream, 1, SI_SBR_EXTENDED_DATA_BITS);
967 FDK_ASSERT(extDataSize <= SBR_EXTENDED_DATA_MAX_CNT);
968
969 if (extDataSize < maxExtSize) {
970 payloadBits += FDKwriteBits (hBitStream, extDataSize, SI_SBR_EXTENSION_SIZE_BITS);
971 } else {
972 payloadBits += FDKwriteBits (hBitStream, maxExtSize, SI_SBR_EXTENSION_SIZE_BITS);
973 payloadBits += FDKwriteBits (hBitStream, extDataSize - maxExtSize, SI_SBR_EXTENSION_ESC_COUNT_BITS);
974 }
975
976 /* parametric coding signalled here? */
977 if(hParametricStereo){
978 writtenNoBits += FDKwriteBits (hBitStream, EXTENSION_ID_PS_CODING, SI_SBR_EXTENSION_ID_BITS);
979 writtenNoBits += FDKsbrEnc_PSEnc_WritePSData(hParametricStereo, hBitStream);
980 }
981
982 payloadBits += writtenNoBits;
983
984 /* byte alignment */
985 writtenNoBits = writtenNoBits%8;
986 if(writtenNoBits)
987 payloadBits += FDKwriteBits(hBitStream, 0, (8 - writtenNoBits));
988 } else {
989 payloadBits += FDKwriteBits (hBitStream, 0, SI_SBR_EXTENDED_DATA_BITS);
990 }
991
992 return payloadBits;
993 }
994
995
996 /*****************************************************************************
997
998 functionname: writeSyntheticCodingData
999 description: writes bits corresponding to the "synthetic-coding"-extension
1000 returns: number of bits written
1001 input:
1002 output:
1003
1004 *****************************************************************************/
writeSyntheticCodingData(HANDLE_SBR_ENV_DATA sbrEnvData,HANDLE_FDK_BITSTREAM hBitStream)1005 static INT writeSyntheticCodingData (HANDLE_SBR_ENV_DATA sbrEnvData,
1006 HANDLE_FDK_BITSTREAM hBitStream)
1007
1008 {
1009 INT i;
1010 INT payloadBits = 0;
1011
1012 payloadBits += FDKwriteBits (hBitStream, sbrEnvData->addHarmonicFlag, 1);
1013
1014 if (sbrEnvData->addHarmonicFlag) {
1015 for (i = 0; i < sbrEnvData->noHarmonics; i++) {
1016 payloadBits += FDKwriteBits (hBitStream, sbrEnvData->addHarmonic[i], 1);
1017 }
1018 }
1019
1020 return payloadBits;
1021 }
1022
1023 /*****************************************************************************
1024
1025 functionname: getSbrExtendedDataSize
1026 description: counts the number of bits needed for encoding the
1027 extended data (including extension id)
1028
1029 returns: number of bits needed for the extended data
1030 input:
1031 output:
1032
1033 *****************************************************************************/
1034 static INT
getSbrExtendedDataSize(HANDLE_PARAMETRIC_STEREO hParametricStereo)1035 getSbrExtendedDataSize (HANDLE_PARAMETRIC_STEREO hParametricStereo)
1036 {
1037 INT extDataBits = 0;
1038
1039 /* add your new extended data counting methods here */
1040
1041 /*
1042 no extended data
1043 */
1044
1045 if(hParametricStereo){
1046 /* PS extended data */
1047 extDataBits += SI_SBR_EXTENSION_ID_BITS;
1048 extDataBits += FDKsbrEnc_PSEnc_WritePSData(hParametricStereo, NULL);
1049 }
1050
1051 return (extDataBits+7) >> 3;
1052 }
1053
1054
1055
1056
1057
1058