1
2 /* -----------------------------------------------------------------------------------------------------------
3 Software 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
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 int bits;
287
288 bits = encodeSbrHeaderData (&sbrEncoder->sbrElement[element_index]->sbrHeaderData, hBs);
289
290 if (fSendHeaders == 0) {
291 /* Prevent header being embedded into the SBR payload. */
292 sbrEncoder->sbrElement[element_index]->sbrBitstreamData.NrSendHeaderData = -1;
293 sbrEncoder->sbrElement[element_index]->sbrBitstreamData.HeaderActive = 0;
294 sbrEncoder->sbrElement[element_index]->sbrBitstreamData.CountSendHeaderData = -1;
295 }
296 }
297
298
299 /*****************************************************************************
300
301 functionname: encodeSbrHeader
302 description: encodes SBR Header information
303 returns: number of bits written
304 input:
305 output:
306
307 *****************************************************************************/
308 static INT
encodeSbrHeader(HANDLE_SBR_HEADER_DATA sbrHeaderData,HANDLE_SBR_BITSTREAM_DATA sbrBitstreamData,HANDLE_COMMON_DATA cmonData)309 encodeSbrHeader (HANDLE_SBR_HEADER_DATA sbrHeaderData,
310 HANDLE_SBR_BITSTREAM_DATA sbrBitstreamData,
311 HANDLE_COMMON_DATA cmonData)
312 {
313 INT payloadBits = 0;
314
315 if (sbrBitstreamData->HeaderActive) {
316 payloadBits += FDKwriteBits (&cmonData->sbrBitbuf, 1, 1);
317 payloadBits += encodeSbrHeaderData (sbrHeaderData,
318 &cmonData->sbrBitbuf);
319 }
320 else {
321 payloadBits += FDKwriteBits (&cmonData->sbrBitbuf, 0, 1);
322 }
323
324 cmonData->sbrHdrBits = payloadBits;
325
326 return payloadBits;
327 }
328
329
330
331 /*****************************************************************************
332
333 functionname: encodeSbrHeaderData
334 description: writes sbr_header()
335 bs_protocol_version through bs_header_extra_2
336 returns: number of bits written
337 input:
338 output:
339
340 *****************************************************************************/
341 static INT
encodeSbrHeaderData(HANDLE_SBR_HEADER_DATA sbrHeaderData,HANDLE_FDK_BITSTREAM hBitStream)342 encodeSbrHeaderData (HANDLE_SBR_HEADER_DATA sbrHeaderData,
343 HANDLE_FDK_BITSTREAM hBitStream)
344
345 {
346 INT payloadBits = 0;
347 if (sbrHeaderData != NULL) {
348 payloadBits += FDKwriteBits (hBitStream, sbrHeaderData->sbr_amp_res,
349 SI_SBR_AMP_RES_BITS);
350 payloadBits += FDKwriteBits (hBitStream, sbrHeaderData->sbr_start_frequency,
351 SI_SBR_START_FREQ_BITS);
352 payloadBits += FDKwriteBits (hBitStream, sbrHeaderData->sbr_stop_frequency,
353 SI_SBR_STOP_FREQ_BITS);
354 payloadBits += FDKwriteBits (hBitStream, sbrHeaderData->sbr_xover_band,
355 SI_SBR_XOVER_BAND_BITS);
356
357 payloadBits += FDKwriteBits (hBitStream, 0,
358 SI_SBR_RESERVED_BITS);
359
360 payloadBits += FDKwriteBits (hBitStream, sbrHeaderData->header_extra_1,
361 SI_SBR_HEADER_EXTRA_1_BITS);
362 payloadBits += FDKwriteBits (hBitStream, sbrHeaderData->header_extra_2,
363 SI_SBR_HEADER_EXTRA_2_BITS);
364
365
366 if (sbrHeaderData->header_extra_1) {
367 payloadBits += FDKwriteBits (hBitStream, sbrHeaderData->freqScale,
368 SI_SBR_FREQ_SCALE_BITS);
369 payloadBits += FDKwriteBits (hBitStream, sbrHeaderData->alterScale,
370 SI_SBR_ALTER_SCALE_BITS);
371 payloadBits += FDKwriteBits (hBitStream, sbrHeaderData->sbr_noise_bands,
372 SI_SBR_NOISE_BANDS_BITS);
373 } /* sbrHeaderData->header_extra_1 */
374
375 if (sbrHeaderData->header_extra_2) {
376 payloadBits += FDKwriteBits (hBitStream, sbrHeaderData->sbr_limiter_bands,
377 SI_SBR_LIMITER_BANDS_BITS);
378 payloadBits += FDKwriteBits (hBitStream, sbrHeaderData->sbr_limiter_gains,
379 SI_SBR_LIMITER_GAINS_BITS);
380 payloadBits += FDKwriteBits (hBitStream, sbrHeaderData->sbr_interpol_freq,
381 SI_SBR_INTERPOL_FREQ_BITS);
382 payloadBits += FDKwriteBits (hBitStream, sbrHeaderData->sbr_smoothing_length,
383 SI_SBR_SMOOTHING_LENGTH_BITS);
384
385 } /* sbrHeaderData->header_extra_2 */
386 } /* sbrHeaderData != NULL */
387
388 return payloadBits;
389 }
390
391
392 /*****************************************************************************
393
394 functionname: encodeSbrData
395 description: encodes sbr Data information
396 returns: number of bits written
397 input:
398 output:
399
400 *****************************************************************************/
401 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)402 encodeSbrData (HANDLE_SBR_ENV_DATA sbrEnvDataLeft,
403 HANDLE_SBR_ENV_DATA sbrEnvDataRight,
404 HANDLE_PARAMETRIC_STEREO hParametricStereo,
405 HANDLE_COMMON_DATA cmonData,
406 SBR_ELEMENT_TYPE sbrElem,
407 INT coupling,
408 UINT sbrSyntaxFlags)
409 {
410 INT payloadBits = 0;
411
412 switch (sbrElem) {
413 case SBR_ID_SCE:
414 payloadBits += encodeSbrSingleChannelElement (sbrEnvDataLeft, &cmonData->sbrBitbuf, hParametricStereo, sbrSyntaxFlags);
415 break;
416 case SBR_ID_CPE:
417 payloadBits += encodeSbrChannelPairElement (sbrEnvDataLeft, sbrEnvDataRight, hParametricStereo, &cmonData->sbrBitbuf, coupling);
418 break;
419 default:
420 /* we never should apply SBR to any other element type */
421 FDK_ASSERT (0);
422 }
423
424 cmonData->sbrDataBits = payloadBits;
425
426 return payloadBits;
427 }
428
429 #define MODE_FREQ_TANS 1
430 #define MODE_NO_FREQ_TRAN 0
431 #define LD_TRANSMISSION MODE_FREQ_TANS
encodeFreqs(int mode)432 static int encodeFreqs (int mode) {
433 return ((mode & MODE_FREQ_TANS) ? 1 : 0);
434 }
435
436
437 /*****************************************************************************
438
439 functionname: encodeSbrSingleChannelElement
440 description: encodes sbr SCE information
441 returns: number of bits written
442 input:
443 output:
444
445 *****************************************************************************/
446 static INT
encodeSbrSingleChannelElement(HANDLE_SBR_ENV_DATA sbrEnvData,HANDLE_FDK_BITSTREAM hBitStream,HANDLE_PARAMETRIC_STEREO hParametricStereo,UINT sbrSyntaxFlags)447 encodeSbrSingleChannelElement (HANDLE_SBR_ENV_DATA sbrEnvData,
448 HANDLE_FDK_BITSTREAM hBitStream
449 ,HANDLE_PARAMETRIC_STEREO hParametricStereo
450 ,UINT sbrSyntaxFlags
451 )
452 {
453 INT i, payloadBits = 0;
454
455 payloadBits += FDKwriteBits (hBitStream, 0, SI_SBR_DATA_EXTRA_BITS); /* no reserved bits */
456
457 if (sbrEnvData->ldGrid) {
458 if ( sbrEnvData->hSbrBSGrid->frameClass != FIXFIXonly ) {
459 /* encode normal SbrGrid */
460 payloadBits += encodeSbrGrid (sbrEnvData, hBitStream);
461 } else {
462 /* use FIXFIXonly frame Grid */
463 payloadBits += encodeLowDelaySbrGrid ( sbrEnvData, hBitStream, encodeFreqs(LD_TRANSMISSION));
464 }
465 }
466 else
467 {
468 if (sbrSyntaxFlags & SBR_SYNTAX_SCALABLE) {
469 payloadBits += FDKwriteBits (hBitStream, 1, SI_SBR_COUPLING_BITS);
470 }
471 payloadBits += encodeSbrGrid (sbrEnvData, hBitStream);
472 }
473
474 payloadBits += encodeSbrDtdf (sbrEnvData, hBitStream);
475
476 for (i = 0; i < sbrEnvData->noOfnoisebands; i++) {
477 payloadBits += FDKwriteBits (hBitStream, sbrEnvData->sbr_invf_mode_vec[i], SI_SBR_INVF_MODE_BITS);
478 }
479
480 payloadBits += writeEnvelopeData (sbrEnvData, hBitStream, 0);
481 payloadBits += writeNoiseLevelData (sbrEnvData, hBitStream, 0);
482
483 payloadBits += writeSyntheticCodingData (sbrEnvData,hBitStream);
484
485 payloadBits += encodeExtendedData(hParametricStereo, hBitStream);
486
487 return payloadBits;
488 }
489
490
491 /*****************************************************************************
492
493 functionname: encodeSbrChannelPairElement
494 description: encodes sbr CPE information
495 returns:
496 input:
497 output:
498
499 *****************************************************************************/
500 static INT
encodeSbrChannelPairElement(HANDLE_SBR_ENV_DATA sbrEnvDataLeft,HANDLE_SBR_ENV_DATA sbrEnvDataRight,HANDLE_PARAMETRIC_STEREO hParametricStereo,HANDLE_FDK_BITSTREAM hBitStream,INT coupling)501 encodeSbrChannelPairElement (HANDLE_SBR_ENV_DATA sbrEnvDataLeft,
502 HANDLE_SBR_ENV_DATA sbrEnvDataRight,
503 HANDLE_PARAMETRIC_STEREO hParametricStereo,
504 HANDLE_FDK_BITSTREAM hBitStream,
505 INT coupling)
506 {
507 INT payloadBits = 0;
508 INT i = 0;
509
510 payloadBits += FDKwriteBits (hBitStream, 0, SI_SBR_DATA_EXTRA_BITS); /* no reserved bits */
511
512 payloadBits += FDKwriteBits (hBitStream, coupling, SI_SBR_COUPLING_BITS);
513
514 if (coupling) {
515 if (sbrEnvDataLeft->ldGrid) {
516 if ( sbrEnvDataLeft->hSbrBSGrid->frameClass != FIXFIXonly ) {
517 /* normal SbrGrid */
518 payloadBits += encodeSbrGrid (sbrEnvDataLeft, hBitStream);
519
520 } else {
521 /* FIXFIXonly frame Grid */
522 payloadBits += encodeLowDelaySbrGrid ( sbrEnvDataLeft, hBitStream, encodeFreqs(LD_TRANSMISSION));
523 }
524 } else
525 payloadBits += encodeSbrGrid (sbrEnvDataLeft, hBitStream);
526
527 payloadBits += encodeSbrDtdf (sbrEnvDataLeft, hBitStream);
528 payloadBits += encodeSbrDtdf (sbrEnvDataRight, hBitStream);
529
530 for (i = 0; i < sbrEnvDataLeft->noOfnoisebands; i++) {
531 payloadBits += FDKwriteBits (hBitStream, sbrEnvDataLeft->sbr_invf_mode_vec[i], SI_SBR_INVF_MODE_BITS);
532 }
533
534 payloadBits += writeEnvelopeData (sbrEnvDataLeft, hBitStream,1);
535 payloadBits += writeNoiseLevelData (sbrEnvDataLeft, hBitStream,1);
536 payloadBits += writeEnvelopeData (sbrEnvDataRight, hBitStream,1);
537 payloadBits += writeNoiseLevelData (sbrEnvDataRight, hBitStream,1);
538
539 payloadBits += writeSyntheticCodingData (sbrEnvDataLeft,hBitStream);
540 payloadBits += writeSyntheticCodingData (sbrEnvDataRight,hBitStream);
541
542 } else { /* no coupling */
543 FDK_ASSERT(sbrEnvDataLeft->ldGrid == sbrEnvDataRight->ldGrid);
544
545 if (sbrEnvDataLeft->ldGrid || sbrEnvDataRight->ldGrid) {
546 /* sbrEnvDataLeft (left channel) */
547 if ( sbrEnvDataLeft->hSbrBSGrid->frameClass != FIXFIXonly) {
548 /* no FIXFIXonly Frame so we dont need encodeLowDelaySbrGrid */
549 /* normal SbrGrid */
550 payloadBits += encodeSbrGrid (sbrEnvDataLeft, hBitStream);
551
552 } else {
553 /* FIXFIXonly frame Grid */
554 payloadBits += encodeLowDelaySbrGrid ( sbrEnvDataLeft, hBitStream, encodeFreqs(LD_TRANSMISSION));
555 }
556
557 /* sbrEnvDataRight (right channel) */
558 if ( sbrEnvDataRight->hSbrBSGrid->frameClass != FIXFIXonly) {
559 /* no FIXFIXonly Frame so we dont need encodeLowDelaySbrGrid */
560 /* normal SbrGrid */
561 payloadBits += encodeSbrGrid (sbrEnvDataRight, hBitStream);
562
563 } else {
564 /* FIXFIXonly frame Grid */
565 payloadBits += encodeLowDelaySbrGrid ( sbrEnvDataRight, hBitStream, encodeFreqs(LD_TRANSMISSION));
566 }
567 } else
568 {
569 payloadBits += encodeSbrGrid (sbrEnvDataLeft, hBitStream);
570 payloadBits += encodeSbrGrid (sbrEnvDataRight, hBitStream);
571 }
572 payloadBits += encodeSbrDtdf (sbrEnvDataLeft, hBitStream);
573 payloadBits += encodeSbrDtdf (sbrEnvDataRight, hBitStream);
574
575 for (i = 0; i < sbrEnvDataLeft->noOfnoisebands; i++) {
576 payloadBits += FDKwriteBits (hBitStream, sbrEnvDataLeft->sbr_invf_mode_vec[i],
577 SI_SBR_INVF_MODE_BITS);
578 }
579 for (i = 0; i < sbrEnvDataRight->noOfnoisebands; i++) {
580 payloadBits += FDKwriteBits (hBitStream, sbrEnvDataRight->sbr_invf_mode_vec[i],
581 SI_SBR_INVF_MODE_BITS);
582 }
583
584 payloadBits += writeEnvelopeData (sbrEnvDataLeft, hBitStream,0);
585 payloadBits += writeEnvelopeData (sbrEnvDataRight, hBitStream,0);
586 payloadBits += writeNoiseLevelData (sbrEnvDataLeft, hBitStream,0);
587 payloadBits += writeNoiseLevelData (sbrEnvDataRight, hBitStream,0);
588
589 payloadBits += writeSyntheticCodingData (sbrEnvDataLeft,hBitStream);
590 payloadBits += writeSyntheticCodingData (sbrEnvDataRight,hBitStream);
591
592 } /* coupling */
593
594 payloadBits += encodeExtendedData(hParametricStereo, hBitStream);
595
596 return payloadBits;
597 }
598
ceil_ln2(INT x)599 static INT ceil_ln2(INT x)
600 {
601 INT tmp=-1;
602 while((1<<++tmp) < x);
603 return(tmp);
604 }
605
606
607 /*****************************************************************************
608
609 functionname: encodeSbrGrid
610 description: if hBitStream != NULL writes bits that describes the
611 time/frequency grouping of a frame; else counts them only
612 returns: number of bits written or counted
613 input:
614 output:
615
616 *****************************************************************************/
617 static INT
encodeSbrGrid(HANDLE_SBR_ENV_DATA sbrEnvData,HANDLE_FDK_BITSTREAM hBitStream)618 encodeSbrGrid (HANDLE_SBR_ENV_DATA sbrEnvData, HANDLE_FDK_BITSTREAM hBitStream)
619 {
620 INT payloadBits = 0;
621 INT i, temp;
622 INT bufferFrameStart = sbrEnvData->hSbrBSGrid->bufferFrameStart;
623 INT numberTimeSlots = sbrEnvData->hSbrBSGrid->numberTimeSlots;
624
625 if (sbrEnvData->ldGrid)
626 payloadBits += FDKwriteBits (hBitStream,
627 sbrEnvData->hSbrBSGrid->frameClass,
628 SBR_CLA_BITS_LD);
629 else
630 payloadBits += FDKwriteBits (hBitStream,
631 sbrEnvData->hSbrBSGrid->frameClass,
632 SBR_CLA_BITS);
633
634 switch (sbrEnvData->hSbrBSGrid->frameClass) {
635 case FIXFIXonly:
636 FDK_ASSERT(0 /* Fatal error in encodeSbrGrid! */);
637 break;
638 case FIXFIX:
639 temp = ceil_ln2(sbrEnvData->hSbrBSGrid->bs_num_env);
640 payloadBits += FDKwriteBits (hBitStream, temp, SBR_ENV_BITS);
641 if ((sbrEnvData->ldGrid) && (sbrEnvData->hSbrBSGrid->bs_num_env==1))
642 payloadBits += FDKwriteBits(hBitStream, sbrEnvData->currentAmpResFF, SI_SBR_AMP_RES_BITS);
643 payloadBits += FDKwriteBits (hBitStream, sbrEnvData->hSbrBSGrid->v_f[0], SBR_RES_BITS);
644
645 break;
646
647 case FIXVAR:
648 case VARFIX:
649 if (sbrEnvData->hSbrBSGrid->frameClass == FIXVAR)
650 temp = sbrEnvData->hSbrBSGrid->bs_abs_bord - (bufferFrameStart + numberTimeSlots);
651 else
652 temp = sbrEnvData->hSbrBSGrid->bs_abs_bord - bufferFrameStart;
653
654 payloadBits += FDKwriteBits (hBitStream, temp, SBR_ABS_BITS);
655 payloadBits += FDKwriteBits (hBitStream, sbrEnvData->hSbrBSGrid->n, SBR_NUM_BITS);
656
657 for (i = 0; i < sbrEnvData->hSbrBSGrid->n; i++) {
658 temp = (sbrEnvData->hSbrBSGrid->bs_rel_bord[i] - 2) >> 1;
659 payloadBits += FDKwriteBits (hBitStream, temp, SBR_REL_BITS);
660 }
661
662 temp = ceil_ln2(sbrEnvData->hSbrBSGrid->n + 2);
663 payloadBits += FDKwriteBits (hBitStream, sbrEnvData->hSbrBSGrid->p, temp);
664
665 for (i = 0; i < sbrEnvData->hSbrBSGrid->n + 1; i++) {
666 payloadBits += FDKwriteBits (hBitStream, sbrEnvData->hSbrBSGrid->v_f[i],
667 SBR_RES_BITS);
668 }
669 break;
670
671 case VARVAR:
672 temp = sbrEnvData->hSbrBSGrid->bs_abs_bord_0 - bufferFrameStart;
673 payloadBits += FDKwriteBits (hBitStream, temp, SBR_ABS_BITS);
674 temp = sbrEnvData->hSbrBSGrid->bs_abs_bord_1 - (bufferFrameStart + numberTimeSlots);
675 payloadBits += FDKwriteBits (hBitStream, temp, SBR_ABS_BITS);
676
677 payloadBits += FDKwriteBits (hBitStream, sbrEnvData->hSbrBSGrid->bs_num_rel_0, SBR_NUM_BITS);
678 payloadBits += FDKwriteBits (hBitStream, sbrEnvData->hSbrBSGrid->bs_num_rel_1, SBR_NUM_BITS);
679
680 for (i = 0; i < sbrEnvData->hSbrBSGrid->bs_num_rel_0; i++) {
681 temp = (sbrEnvData->hSbrBSGrid->bs_rel_bord_0[i] - 2) >> 1;
682 payloadBits += FDKwriteBits (hBitStream, temp, SBR_REL_BITS);
683 }
684
685 for (i = 0; i < sbrEnvData->hSbrBSGrid->bs_num_rel_1; i++) {
686 temp = (sbrEnvData->hSbrBSGrid->bs_rel_bord_1[i] - 2) >> 1;
687 payloadBits += FDKwriteBits (hBitStream, temp, SBR_REL_BITS);
688 }
689
690 temp = ceil_ln2(sbrEnvData->hSbrBSGrid->bs_num_rel_0 +
691 sbrEnvData->hSbrBSGrid->bs_num_rel_1 + 2);
692 payloadBits += FDKwriteBits (hBitStream, sbrEnvData->hSbrBSGrid->p, temp);
693
694 temp = sbrEnvData->hSbrBSGrid->bs_num_rel_0 +
695 sbrEnvData->hSbrBSGrid->bs_num_rel_1 + 1;
696
697 for (i = 0; i < temp; i++) {
698 payloadBits += FDKwriteBits (hBitStream, sbrEnvData->hSbrBSGrid->v_fLR[i],
699 SBR_RES_BITS);
700 }
701 break;
702 }
703
704 return payloadBits;
705 }
706
707 #define SBR_CLA_BITS_LD 1
708 /*****************************************************************************
709
710 functionname: encodeLowDelaySbrGrid
711 description: if hBitStream != NULL writes bits that describes the
712 time/frequency grouping of a frame;
713 else counts them only
714 (this function only write the FIXFIXonly Bitstream data)
715 returns: number of bits written or counted
716 input:
717 output:
718
719 *****************************************************************************/
720 static int
encodeLowDelaySbrGrid(HANDLE_SBR_ENV_DATA sbrEnvData,HANDLE_FDK_BITSTREAM hBitStream,int transmitFreqs)721 encodeLowDelaySbrGrid ( HANDLE_SBR_ENV_DATA sbrEnvData,
722 HANDLE_FDK_BITSTREAM hBitStream,
723 int transmitFreqs
724 )
725 {
726 int payloadBits = 0;
727 int i;
728
729 /* write FIXFIXonly Grid */
730 /* write frameClass [1 bit] for FIXFIXonly Grid */
731 payloadBits += FDKwriteBits(hBitStream, 1, SBR_CLA_BITS_LD);
732
733 /* absolute Borders are fix: 0,X,X,X,nTimeSlots; so we dont have to transmit them */
734 /* only transmit the transient position! */
735 /* with this info (b1) we can reconstruct the Frame on Decoder side : */
736 /* border[0] = 0; border[1] = b1; border[2]=b1+2; border[3] = nrTimeSlots */
737
738 /* use 3 or 4bits for transient border (border) */
739 if (sbrEnvData->hSbrBSGrid->numberTimeSlots == 8)
740 payloadBits += FDKwriteBits ( hBitStream, sbrEnvData->hSbrBSGrid->bs_abs_bord, 3);
741 else
742 payloadBits += FDKwriteBits ( hBitStream, sbrEnvData->hSbrBSGrid->bs_abs_bord, 4);
743
744 if (transmitFreqs) {
745 /* write FreqRes grid */
746 for (i = 0; i < sbrEnvData->hSbrBSGrid->bs_num_env; i++) {
747 payloadBits += FDKwriteBits (hBitStream, sbrEnvData->hSbrBSGrid->v_f[i], SBR_RES_BITS);
748 }
749 }
750
751 return payloadBits;
752 }
753
754 /*****************************************************************************
755
756 functionname: encodeSbrDtdf
757 description: writes bits that describes the direction of the envelopes of a frame
758 returns: number of bits written
759 input:
760 output:
761
762 *****************************************************************************/
763 static INT
encodeSbrDtdf(HANDLE_SBR_ENV_DATA sbrEnvData,HANDLE_FDK_BITSTREAM hBitStream)764 encodeSbrDtdf (HANDLE_SBR_ENV_DATA sbrEnvData, HANDLE_FDK_BITSTREAM hBitStream)
765 {
766 INT i, payloadBits = 0, noOfNoiseEnvelopes;
767
768 noOfNoiseEnvelopes = sbrEnvData->noOfEnvelopes > 1 ? 2 : 1;
769
770 for (i = 0; i < sbrEnvData->noOfEnvelopes; ++i) {
771 payloadBits += FDKwriteBits (hBitStream, sbrEnvData->domain_vec[i], SBR_DIR_BITS);
772 }
773 for (i = 0; i < noOfNoiseEnvelopes; ++i) {
774 payloadBits += FDKwriteBits (hBitStream, sbrEnvData->domain_vec_noise[i], SBR_DIR_BITS);
775 }
776
777 return payloadBits;
778 }
779
780
781 /*****************************************************************************
782
783 functionname: writeNoiseLevelData
784 description: writes bits corresponding to the noise-floor-level
785 returns: number of bits written
786 input:
787 output:
788
789 *****************************************************************************/
790 static INT
writeNoiseLevelData(HANDLE_SBR_ENV_DATA sbrEnvData,HANDLE_FDK_BITSTREAM hBitStream,INT coupling)791 writeNoiseLevelData (HANDLE_SBR_ENV_DATA sbrEnvData, HANDLE_FDK_BITSTREAM hBitStream, INT coupling)
792 {
793 INT j, i, payloadBits = 0;
794 INT nNoiseEnvelopes = sbrEnvData->noOfEnvelopes > 1 ? 2 : 1;
795
796 for (i = 0; i < nNoiseEnvelopes; i++) {
797 switch (sbrEnvData->domain_vec_noise[i]) {
798 case FREQ:
799 if (coupling && sbrEnvData->balance) {
800 payloadBits += FDKwriteBits (hBitStream,
801 sbrEnvData->sbr_noise_levels[i * sbrEnvData->noOfnoisebands],
802 sbrEnvData->si_sbr_start_noise_bits_balance);
803 } else {
804 payloadBits += FDKwriteBits (hBitStream,
805 sbrEnvData->sbr_noise_levels[i * sbrEnvData->noOfnoisebands],
806 sbrEnvData->si_sbr_start_noise_bits);
807 }
808
809 for (j = 1 + i * sbrEnvData->noOfnoisebands; j < (sbrEnvData->noOfnoisebands * (1 + i)); j++) {
810 if (coupling) {
811 if (sbrEnvData->balance) {
812 /* coupling && balance */
813 payloadBits += FDKwriteBits (hBitStream,
814 sbrEnvData->hufftableNoiseBalanceFreqC[sbrEnvData->sbr_noise_levels[j] +
815 CODE_BOOK_SCF_LAV_BALANCE11],
816 sbrEnvData->hufftableNoiseBalanceFreqL[sbrEnvData->sbr_noise_levels[j] +
817 CODE_BOOK_SCF_LAV_BALANCE11]);
818 } else {
819 /* coupling && !balance */
820 payloadBits += FDKwriteBits (hBitStream,
821 sbrEnvData->hufftableNoiseLevelFreqC[sbrEnvData->sbr_noise_levels[j] +
822 CODE_BOOK_SCF_LAV11],
823 sbrEnvData->hufftableNoiseLevelFreqL[sbrEnvData->sbr_noise_levels[j] +
824 CODE_BOOK_SCF_LAV11]);
825 }
826 } else {
827 /* !coupling */
828 payloadBits += FDKwriteBits (hBitStream,
829 sbrEnvData->hufftableNoiseFreqC[sbrEnvData->sbr_noise_levels[j] +
830 CODE_BOOK_SCF_LAV11],
831 sbrEnvData->hufftableNoiseFreqL[sbrEnvData->sbr_noise_levels[j] +
832 CODE_BOOK_SCF_LAV11]);
833 }
834 }
835 break;
836
837 case TIME:
838 for (j = i * sbrEnvData->noOfnoisebands; j < (sbrEnvData->noOfnoisebands * (1 + i)); j++) {
839 if (coupling) {
840 if (sbrEnvData->balance) {
841 /* coupling && balance */
842 payloadBits += FDKwriteBits (hBitStream,
843 sbrEnvData->hufftableNoiseBalanceTimeC[sbrEnvData->sbr_noise_levels[j] +
844 CODE_BOOK_SCF_LAV_BALANCE11],
845 sbrEnvData->hufftableNoiseBalanceTimeL[sbrEnvData->sbr_noise_levels[j] +
846 CODE_BOOK_SCF_LAV_BALANCE11]);
847 } else {
848 /* coupling && !balance */
849 payloadBits += FDKwriteBits (hBitStream,
850 sbrEnvData->hufftableNoiseLevelTimeC[sbrEnvData->sbr_noise_levels[j] +
851 CODE_BOOK_SCF_LAV11],
852 sbrEnvData->hufftableNoiseLevelTimeL[sbrEnvData->sbr_noise_levels[j] +
853 CODE_BOOK_SCF_LAV11]);
854 }
855 } else {
856 /* !coupling */
857 payloadBits += FDKwriteBits (hBitStream,
858 sbrEnvData->hufftableNoiseLevelTimeC[sbrEnvData->sbr_noise_levels[j] +
859 CODE_BOOK_SCF_LAV11],
860 sbrEnvData->hufftableNoiseLevelTimeL[sbrEnvData->sbr_noise_levels[j] +
861 CODE_BOOK_SCF_LAV11]);
862 }
863 }
864 break;
865 }
866 }
867 return payloadBits;
868 }
869
870
871 /*****************************************************************************
872
873 functionname: writeEnvelopeData
874 description: writes bits corresponding to the envelope
875 returns: number of bits written
876 input:
877 output:
878
879 *****************************************************************************/
880 static INT
writeEnvelopeData(HANDLE_SBR_ENV_DATA sbrEnvData,HANDLE_FDK_BITSTREAM hBitStream,INT coupling)881 writeEnvelopeData (HANDLE_SBR_ENV_DATA sbrEnvData, HANDLE_FDK_BITSTREAM hBitStream, INT coupling)
882 {
883 INT payloadBits = 0, j, i, delta;
884
885 for (j = 0; j < sbrEnvData->noOfEnvelopes; j++) { /* loop over all envelopes */
886 if (sbrEnvData->domain_vec[j] == FREQ) {
887 if (coupling && sbrEnvData->balance) {
888 payloadBits += FDKwriteBits (hBitStream, sbrEnvData->ienvelope[j][0], sbrEnvData->si_sbr_start_env_bits_balance);
889 } else {
890 payloadBits += FDKwriteBits (hBitStream, sbrEnvData->ienvelope[j][0], sbrEnvData->si_sbr_start_env_bits);
891 }
892 }
893
894 for (i = 1 - sbrEnvData->domain_vec[j]; i < sbrEnvData->noScfBands[j]; i++) {
895 delta = sbrEnvData->ienvelope[j][i];
896 if (coupling && sbrEnvData->balance) {
897 FDK_ASSERT (fixp_abs (delta) <= sbrEnvData->codeBookScfLavBalance);
898 } else {
899 FDK_ASSERT (fixp_abs (delta) <= sbrEnvData->codeBookScfLav);
900 }
901 if (coupling) {
902 if (sbrEnvData->balance) {
903 if (sbrEnvData->domain_vec[j]) {
904 /* coupling && balance && TIME */
905 payloadBits += FDKwriteBits (hBitStream,
906 sbrEnvData->hufftableBalanceTimeC[delta + sbrEnvData->codeBookScfLavBalance],
907 sbrEnvData->hufftableBalanceTimeL[delta + sbrEnvData->codeBookScfLavBalance]);
908 } else {
909 /* coupling && balance && FREQ */
910 payloadBits += FDKwriteBits (hBitStream,
911 sbrEnvData->hufftableBalanceFreqC[delta + sbrEnvData->codeBookScfLavBalance],
912 sbrEnvData->hufftableBalanceFreqL[delta + sbrEnvData->codeBookScfLavBalance]);
913 }
914 } else {
915 if (sbrEnvData->domain_vec[j]) {
916 /* coupling && !balance && TIME */
917 payloadBits += FDKwriteBits (hBitStream,
918 sbrEnvData->hufftableLevelTimeC[delta + sbrEnvData->codeBookScfLav],
919 sbrEnvData->hufftableLevelTimeL[delta + sbrEnvData->codeBookScfLav]);
920 } else {
921 /* coupling && !balance && FREQ */
922 payloadBits += FDKwriteBits (hBitStream,
923 sbrEnvData->hufftableLevelFreqC[delta + sbrEnvData->codeBookScfLav],
924 sbrEnvData->hufftableLevelFreqL[delta + sbrEnvData->codeBookScfLav]);
925 }
926 }
927 } else {
928 if (sbrEnvData->domain_vec[j]) {
929 /* !coupling && TIME */
930 payloadBits += FDKwriteBits (hBitStream,
931 sbrEnvData->hufftableTimeC[delta + sbrEnvData->codeBookScfLav],
932 sbrEnvData->hufftableTimeL[delta + sbrEnvData->codeBookScfLav]);
933 } else {
934 /* !coupling && FREQ */
935 payloadBits += FDKwriteBits (hBitStream,
936 sbrEnvData->hufftableFreqC[delta + sbrEnvData->codeBookScfLav],
937 sbrEnvData->hufftableFreqL[delta + sbrEnvData->codeBookScfLav]);
938 }
939 }
940 }
941 }
942 return payloadBits;
943 }
944
945
946 /*****************************************************************************
947
948 functionname: encodeExtendedData
949 description: writes bits corresponding to the extended data
950 returns: number of bits written
951 input:
952 output:
953
954 *****************************************************************************/
encodeExtendedData(HANDLE_PARAMETRIC_STEREO hParametricStereo,HANDLE_FDK_BITSTREAM hBitStream)955 static INT encodeExtendedData (HANDLE_PARAMETRIC_STEREO hParametricStereo,
956 HANDLE_FDK_BITSTREAM hBitStream)
957 {
958 INT extDataSize;
959 INT payloadBits = 0;
960
961 extDataSize = getSbrExtendedDataSize(hParametricStereo);
962
963
964 if (extDataSize != 0) {
965 INT maxExtSize = (1<<SI_SBR_EXTENSION_SIZE_BITS) - 1;
966 INT writtenNoBits = 0; /* needed to byte align the extended data */
967
968 payloadBits += FDKwriteBits (hBitStream, 1, SI_SBR_EXTENDED_DATA_BITS);
969 FDK_ASSERT(extDataSize <= SBR_EXTENDED_DATA_MAX_CNT);
970
971 if (extDataSize < maxExtSize) {
972 payloadBits += FDKwriteBits (hBitStream, extDataSize, SI_SBR_EXTENSION_SIZE_BITS);
973 } else {
974 payloadBits += FDKwriteBits (hBitStream, maxExtSize, SI_SBR_EXTENSION_SIZE_BITS);
975 payloadBits += FDKwriteBits (hBitStream, extDataSize - maxExtSize, SI_SBR_EXTENSION_ESC_COUNT_BITS);
976 }
977
978 /* parametric coding signalled here? */
979 if(hParametricStereo){
980 writtenNoBits += FDKwriteBits (hBitStream, EXTENSION_ID_PS_CODING, SI_SBR_EXTENSION_ID_BITS);
981 writtenNoBits += FDKsbrEnc_PSEnc_WritePSData(hParametricStereo, hBitStream);
982 }
983
984 payloadBits += writtenNoBits;
985
986 /* byte alignment */
987 writtenNoBits = writtenNoBits%8;
988 if(writtenNoBits)
989 payloadBits += FDKwriteBits(hBitStream, 0, (8 - writtenNoBits));
990 } else {
991 payloadBits += FDKwriteBits (hBitStream, 0, SI_SBR_EXTENDED_DATA_BITS);
992 }
993
994 return payloadBits;
995 }
996
997
998 /*****************************************************************************
999
1000 functionname: writeSyntheticCodingData
1001 description: writes bits corresponding to the "synthetic-coding"-extension
1002 returns: number of bits written
1003 input:
1004 output:
1005
1006 *****************************************************************************/
writeSyntheticCodingData(HANDLE_SBR_ENV_DATA sbrEnvData,HANDLE_FDK_BITSTREAM hBitStream)1007 static INT writeSyntheticCodingData (HANDLE_SBR_ENV_DATA sbrEnvData,
1008 HANDLE_FDK_BITSTREAM hBitStream)
1009
1010 {
1011 INT i;
1012 INT payloadBits = 0;
1013
1014 payloadBits += FDKwriteBits (hBitStream, sbrEnvData->addHarmonicFlag, 1);
1015
1016 if (sbrEnvData->addHarmonicFlag) {
1017 for (i = 0; i < sbrEnvData->noHarmonics; i++) {
1018 payloadBits += FDKwriteBits (hBitStream, sbrEnvData->addHarmonic[i], 1);
1019 }
1020 }
1021
1022 return payloadBits;
1023 }
1024
1025 /*****************************************************************************
1026
1027 functionname: getSbrExtendedDataSize
1028 description: counts the number of bits needed for encoding the
1029 extended data (including extension id)
1030
1031 returns: number of bits needed for the extended data
1032 input:
1033 output:
1034
1035 *****************************************************************************/
1036 static INT
getSbrExtendedDataSize(HANDLE_PARAMETRIC_STEREO hParametricStereo)1037 getSbrExtendedDataSize (HANDLE_PARAMETRIC_STEREO hParametricStereo)
1038 {
1039 INT extDataBits = 0;
1040
1041 /* add your new extended data counting methods here */
1042
1043 /*
1044 no extended data
1045 */
1046
1047 if(hParametricStereo){
1048 /* PS extended data */
1049 extDataBits += SI_SBR_EXTENSION_ID_BITS;
1050 extDataBits += FDKsbrEnc_PSEnc_WritePSData(hParametricStereo, NULL);
1051 }
1052
1053 return (extDataBits+7) >> 3;
1054 }
1055
1056
1057
1058
1059
1060