1 /* -----------------------------------------------------------------------------
2 Software License for The Fraunhofer FDK AAC Codec Library for Android
3
4 © Copyright 1995 - 2018 Fraunhofer-Gesellschaft zur Förderung der angewandten
5 Forschung e.V. All rights reserved.
6
7 1. INTRODUCTION
8 The Fraunhofer FDK AAC Codec Library for Android ("FDK AAC Codec") is software
9 that implements the MPEG Advanced Audio Coding ("AAC") encoding and decoding
10 scheme for digital audio. This FDK AAC Codec software is intended to be used on
11 a wide variety of Android devices.
12
13 AAC's HE-AAC and HE-AAC v2 versions are regarded as today's most efficient
14 general perceptual audio codecs. AAC-ELD is considered the best-performing
15 full-bandwidth communications codec by independent studies and is widely
16 deployed. AAC has been standardized by ISO and IEC as part of the MPEG
17 specifications.
18
19 Patent licenses for necessary patent claims for the FDK AAC Codec (including
20 those of Fraunhofer) may be obtained through Via Licensing
21 (www.vialicensing.com) or through the respective patent owners individually for
22 the purpose of encoding or decoding bit streams in products that are compliant
23 with the ISO/IEC MPEG audio standards. Please note that most manufacturers of
24 Android devices already license these patent claims through Via Licensing or
25 directly from the patent owners, and therefore FDK AAC Codec software may
26 already be covered under those patent licenses when it is used for those
27 licensed purposes only.
28
29 Commercially-licensed AAC software libraries, including floating-point versions
30 with enhanced sound quality, are also available from Fraunhofer. Users are
31 encouraged to check the Fraunhofer website for additional applications
32 information and documentation.
33
34 2. COPYRIGHT LICENSE
35
36 Redistribution and use in source and binary forms, with or without modification,
37 are permitted without payment of copyright license fees provided that you
38 satisfy the following conditions:
39
40 You must retain the complete text of this software license in redistributions of
41 the FDK AAC Codec or your modifications thereto in source code form.
42
43 You must retain the complete text of this software license in the documentation
44 and/or other materials provided with redistributions of the FDK AAC Codec or
45 your modifications thereto in binary form. You must make available free of
46 charge copies of the complete source code of the FDK AAC Codec and your
47 modifications thereto to recipients of copies in binary form.
48
49 The name of Fraunhofer may not be used to endorse or promote products derived
50 from this library without prior written permission.
51
52 You may not charge copyright license fees for anyone to use, copy or distribute
53 the FDK AAC Codec software or your modifications thereto.
54
55 Your modified versions of the FDK AAC Codec must carry prominent notices stating
56 that you changed the software and the date of any change. For modified versions
57 of the FDK AAC Codec, the term "Fraunhofer FDK AAC Codec Library for Android"
58 must be replaced by the term "Third-Party Modified Version of the Fraunhofer FDK
59 AAC Codec Library for Android."
60
61 3. NO PATENT LICENSE
62
63 NO EXPRESS OR IMPLIED LICENSES TO ANY PATENT CLAIMS, including without
64 limitation the patents of Fraunhofer, ARE GRANTED BY THIS SOFTWARE LICENSE.
65 Fraunhofer provides no warranty of patent non-infringement with respect to this
66 software.
67
68 You may use this FDK AAC Codec software or modifications thereto only for
69 purposes that are authorized by appropriate patent licenses.
70
71 4. DISCLAIMER
72
73 This FDK AAC Codec software is provided by Fraunhofer on behalf of the copyright
74 holders and contributors "AS IS" and WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES,
75 including but not limited to the implied warranties of merchantability and
76 fitness for a particular purpose. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
77 CONTRIBUTORS BE LIABLE for any direct, indirect, incidental, special, exemplary,
78 or consequential damages, including but not limited to procurement of substitute
79 goods or services; loss of use, data, or profits, or business interruption,
80 however caused and on any theory of liability, whether in contract, strict
81 liability, or tort (including negligence), arising in any way out of the use of
82 this software, even if advised of the possibility of such damage.
83
84 5. CONTACT INFORMATION
85
86 Fraunhofer Institute for Integrated Circuits IIS
87 Attention: Audio and Multimedia Departments - FDK AAC LL
88 Am Wolfsmantel 33
89 91058 Erlangen, Germany
90
91 www.iis.fraunhofer.de/amm
92 amm-info@iis.fraunhofer.de
93 ----------------------------------------------------------------------------- */
94
95 /******************* MPEG transport format decoder library *********************
96
97 Author(s): Daniel Homm
98
99 Description:
100
101 *******************************************************************************/
102
103 #include "tpdec_latm.h"
104
105 #include "FDK_bitstream.h"
106
107 #define TPDEC_TRACKINDEX(p, l) (1 * (p) + (l))
108
CLatmDemux_GetValue(HANDLE_FDK_BITSTREAM bs)109 static UINT CLatmDemux_GetValue(HANDLE_FDK_BITSTREAM bs) {
110 UCHAR bytesForValue = 0, tmp = 0;
111 int value = 0;
112
113 bytesForValue = (UCHAR)FDKreadBits(bs, 2);
114
115 for (UINT i = 0; i <= bytesForValue; i++) {
116 value <<= 8;
117 tmp = (UCHAR)FDKreadBits(bs, 8);
118 value += tmp;
119 }
120
121 return value;
122 }
123
CLatmDemux_ReadAudioMuxElement(HANDLE_FDK_BITSTREAM bs,CLatmDemux * pLatmDemux,int m_muxConfigPresent,CSTpCallBacks * pTpDecCallbacks,CSAudioSpecificConfig * pAsc,int * pfConfigFound)124 static TRANSPORTDEC_ERROR CLatmDemux_ReadAudioMuxElement(
125 HANDLE_FDK_BITSTREAM bs, CLatmDemux *pLatmDemux, int m_muxConfigPresent,
126 CSTpCallBacks *pTpDecCallbacks, CSAudioSpecificConfig *pAsc,
127 int *pfConfigFound) {
128 TRANSPORTDEC_ERROR ErrorStatus = TRANSPORTDEC_OK;
129
130 if (m_muxConfigPresent) {
131 pLatmDemux->m_useSameStreamMux = FDKreadBits(bs, 1);
132
133 if (!pLatmDemux->m_useSameStreamMux) {
134 int i;
135 UCHAR configChanged = 0;
136 UCHAR configMode = 0;
137
138 FDK_BITSTREAM bsAnchor;
139
140 FDK_BITSTREAM bsAnchorDummyParse;
141
142 if (!pLatmDemux->applyAsc) {
143 bsAnchorDummyParse = *bs;
144 pLatmDemux->newCfgHasAudioPreRoll = 0;
145 /* do dummy-parsing of ASC to determine if there is an audioPreRoll */
146 configMode |= AC_CM_DET_CFG_CHANGE;
147 if (TRANSPORTDEC_OK !=
148 (ErrorStatus = CLatmDemux_ReadStreamMuxConfig(
149 bs, pLatmDemux, pTpDecCallbacks, pAsc, pfConfigFound,
150 configMode, configChanged))) {
151 goto bail;
152 }
153
154 /* Allow flushing only when audioPreroll functionality is enabled in
155 * current and new config otherwise the new config can be applied
156 * immediately. */
157 if (pAsc->m_sc.m_usacConfig.element[0]
158 .extElement.usacExtElementHasAudioPreRoll &&
159 pLatmDemux->newCfgHasAudioPreRoll) {
160 pLatmDemux->newCfgHasAudioPreRoll = 0;
161 /* with audioPreRoll we must flush before applying new cfg */
162 pLatmDemux->applyAsc = 0;
163 } else {
164 *bs = bsAnchorDummyParse;
165 pLatmDemux->applyAsc = 1; /* apply new config immediate */
166 }
167 }
168
169 if (pLatmDemux->applyAsc) {
170 for (i = 0; i < 2; i++) {
171 configMode = 0;
172
173 if (i == 0) {
174 configMode |= AC_CM_DET_CFG_CHANGE;
175 bsAnchor = *bs;
176 } else {
177 configMode |= AC_CM_ALLOC_MEM;
178 *bs = bsAnchor;
179 }
180
181 if (TRANSPORTDEC_OK !=
182 (ErrorStatus = CLatmDemux_ReadStreamMuxConfig(
183 bs, pLatmDemux, pTpDecCallbacks, pAsc, pfConfigFound,
184 configMode, configChanged))) {
185 goto bail;
186 }
187
188 if (ErrorStatus == TRANSPORTDEC_OK) {
189 if ((i == 0) && (pAsc->AacConfigChanged || pAsc->SbrConfigChanged ||
190 pAsc->SacConfigChanged)) {
191 int errC;
192
193 configChanged = 1;
194 errC = pTpDecCallbacks->cbFreeMem(pTpDecCallbacks->cbFreeMemData,
195 pAsc);
196 if (errC != 0) {
197 ErrorStatus = TRANSPORTDEC_PARSE_ERROR;
198 goto bail;
199 }
200 }
201 }
202 }
203 }
204 }
205 }
206
207 /* If there was no configuration read, its not possible to parse
208 * PayloadLengthInfo below. */
209 if (!*pfConfigFound) {
210 ErrorStatus = TRANSPORTDEC_SYNC_ERROR;
211 goto bail;
212 }
213
214 if (pLatmDemux->m_AudioMuxVersionA == 0) {
215 /* Do only once per call, because parsing and decoding is done in-line. */
216 if (TRANSPORTDEC_OK !=
217 (ErrorStatus = CLatmDemux_ReadPayloadLengthInfo(bs, pLatmDemux))) {
218 *pfConfigFound = 0;
219 goto bail;
220 }
221 } else {
222 /* audioMuxVersionA > 0 is reserved for future extensions */
223 ErrorStatus = TRANSPORTDEC_UNSUPPORTED_FORMAT;
224 *pfConfigFound = 0;
225 goto bail;
226 }
227
228 bail:
229 if (ErrorStatus != TRANSPORTDEC_OK) {
230 pLatmDemux->applyAsc = 1;
231 }
232
233 return (ErrorStatus);
234 }
235
CLatmDemux_Read(HANDLE_FDK_BITSTREAM bs,CLatmDemux * pLatmDemux,TRANSPORT_TYPE tt,CSTpCallBacks * pTpDecCallbacks,CSAudioSpecificConfig * pAsc,int * pfConfigFound,const INT ignoreBufferFullness)236 TRANSPORTDEC_ERROR CLatmDemux_Read(HANDLE_FDK_BITSTREAM bs,
237 CLatmDemux *pLatmDemux, TRANSPORT_TYPE tt,
238 CSTpCallBacks *pTpDecCallbacks,
239 CSAudioSpecificConfig *pAsc,
240 int *pfConfigFound,
241 const INT ignoreBufferFullness) {
242 UINT cntBits;
243 UINT cmpBufferFullness;
244 UINT audioMuxLengthBytesLast = 0;
245 TRANSPORTDEC_ERROR ErrorStatus = TRANSPORTDEC_OK;
246
247 cntBits = FDKgetValidBits(bs);
248
249 if ((INT)cntBits < MIN_LATM_HEADERLENGTH) {
250 return TRANSPORTDEC_NOT_ENOUGH_BITS;
251 }
252
253 if (TRANSPORTDEC_OK != (ErrorStatus = CLatmDemux_ReadAudioMuxElement(
254 bs, pLatmDemux, (tt != TT_MP4_LATM_MCP0),
255 pTpDecCallbacks, pAsc, pfConfigFound)))
256 return (ErrorStatus);
257
258 if (!ignoreBufferFullness) {
259 cmpBufferFullness =
260 24 + audioMuxLengthBytesLast * 8 +
261 pLatmDemux->m_linfo[0][0].m_bufferFullness *
262 pAsc[TPDEC_TRACKINDEX(0, 0)].m_channelConfiguration * 32;
263
264 /* evaluate buffer fullness */
265
266 if (pLatmDemux->m_linfo[0][0].m_bufferFullness != 0xFF) {
267 if (!pLatmDemux->BufferFullnessAchieved) {
268 if (cntBits < cmpBufferFullness) {
269 /* condition for start of decoding is not fulfilled */
270
271 /* the current frame will not be decoded */
272 return TRANSPORTDEC_NOT_ENOUGH_BITS;
273 } else {
274 pLatmDemux->BufferFullnessAchieved = 1;
275 }
276 }
277 }
278 }
279
280 return (ErrorStatus);
281 }
282
CLatmDemux_ReadStreamMuxConfig(HANDLE_FDK_BITSTREAM bs,CLatmDemux * pLatmDemux,CSTpCallBacks * pTpDecCallbacks,CSAudioSpecificConfig * pAsc,int * pfConfigFound,UCHAR configMode,UCHAR configChanged)283 TRANSPORTDEC_ERROR CLatmDemux_ReadStreamMuxConfig(
284 HANDLE_FDK_BITSTREAM bs, CLatmDemux *pLatmDemux,
285 CSTpCallBacks *pTpDecCallbacks, CSAudioSpecificConfig *pAsc,
286 int *pfConfigFound, UCHAR configMode, UCHAR configChanged) {
287 CSAudioSpecificConfig ascDummy; /* the actual config is needed for flushing,
288 after that new config can be parsed */
289 CSAudioSpecificConfig *pAscDummy;
290 pAscDummy = &ascDummy;
291 pLatmDemux->usacExplicitCfgChanged = 0;
292 LATM_LAYER_INFO *p_linfo = NULL;
293 TRANSPORTDEC_ERROR ErrorStatus = TRANSPORTDEC_OK;
294 UCHAR updateConfig[1 * 1] = {0};
295
296 pLatmDemux->m_AudioMuxVersion = FDKreadBits(bs, 1);
297
298 if (pLatmDemux->m_AudioMuxVersion == 0) {
299 pLatmDemux->m_AudioMuxVersionA = 0;
300 } else {
301 pLatmDemux->m_AudioMuxVersionA = FDKreadBits(bs, 1);
302 }
303
304 if (pLatmDemux->m_AudioMuxVersionA == 0) {
305 if (pLatmDemux->m_AudioMuxVersion == 1) {
306 pLatmDemux->m_taraBufferFullness = CLatmDemux_GetValue(bs);
307 }
308 pLatmDemux->m_allStreamsSameTimeFraming = FDKreadBits(bs, 1);
309 pLatmDemux->m_noSubFrames = FDKreadBits(bs, 6) + 1;
310 pLatmDemux->m_numProgram = FDKreadBits(bs, 4) + 1;
311
312 if (pLatmDemux->m_numProgram > LATM_MAX_PROG) {
313 ErrorStatus = TRANSPORTDEC_UNSUPPORTED_FORMAT;
314 goto bail;
315 }
316
317 int idCnt = 0;
318 for (UINT prog = 0; prog < pLatmDemux->m_numProgram; prog++) {
319 pLatmDemux->m_numLayer[prog] = FDKreadBits(bs, 3) + 1;
320 if (pLatmDemux->m_numLayer[prog] > LATM_MAX_LAYER) {
321 ErrorStatus = TRANSPORTDEC_UNSUPPORTED_FORMAT;
322 goto bail;
323 }
324
325 for (UINT lay = 0; lay < pLatmDemux->m_numLayer[prog]; lay++) {
326 int useSameConfig;
327 p_linfo = &pLatmDemux->m_linfo[prog][lay];
328
329 p_linfo->m_streamID = idCnt++;
330 p_linfo->m_frameLengthInBits = 0;
331
332 if ((prog == 0) && (lay == 0)) {
333 useSameConfig = 0;
334 } else {
335 useSameConfig = FDKreadBits(bs, 1);
336 }
337
338 if (useSameConfig) {
339 if (lay > 0) {
340 FDKmemcpy(&pAsc[TPDEC_TRACKINDEX(prog, lay)],
341 &pAsc[TPDEC_TRACKINDEX(prog, lay - 1)],
342 sizeof(CSAudioSpecificConfig));
343 } else {
344 ErrorStatus = TRANSPORTDEC_PARSE_ERROR;
345 goto bail;
346 }
347 } else {
348 UINT usacConfigLengthPrev = 0;
349 UCHAR usacConfigPrev[TP_USAC_MAX_CONFIG_LEN];
350
351 if (!(pLatmDemux->applyAsc) &&
352 (pAsc[TPDEC_TRACKINDEX(prog, lay)].m_aot == AOT_USAC)) {
353 usacConfigLengthPrev =
354 (UINT)(pAsc[TPDEC_TRACKINDEX(prog, lay)]
355 .m_sc.m_usacConfig.UsacConfigBits +
356 7) >>
357 3; /* store previous USAC config length */
358 if (usacConfigLengthPrev > TP_USAC_MAX_CONFIG_LEN) {
359 ErrorStatus = TRANSPORTDEC_PARSE_ERROR;
360 goto bail;
361 }
362 FDKmemclear(usacConfigPrev, TP_USAC_MAX_CONFIG_LEN);
363 FDKmemcpy(
364 usacConfigPrev,
365 &pAsc[TPDEC_TRACKINDEX(prog, lay)].m_sc.m_usacConfig.UsacConfig,
366 usacConfigLengthPrev); /* store previous USAC config */
367 }
368 if (pLatmDemux->m_AudioMuxVersion == 1) {
369 FDK_BITSTREAM tmpBs;
370 UINT ascLen = 0;
371 ascLen = CLatmDemux_GetValue(bs);
372 /* The ascLen could be wrong, so check if validBits<=bufBits*/
373 if (ascLen > FDKgetValidBits(bs)) {
374 ErrorStatus = TRANSPORTDEC_PARSE_ERROR;
375 goto bail;
376 }
377 FDKsyncCache(bs);
378 tmpBs = *bs;
379 tmpBs.hBitBuf.ValidBits = ascLen;
380
381 /* Read ASC */
382 if (pLatmDemux->applyAsc) {
383 if (TRANSPORTDEC_OK !=
384 (ErrorStatus = AudioSpecificConfig_Parse(
385 &pAsc[TPDEC_TRACKINDEX(prog, lay)], &tmpBs, 1,
386 pTpDecCallbacks, configMode, configChanged,
387 AOT_NULL_OBJECT)))
388 goto bail;
389 } else {
390 if (TRANSPORTDEC_OK !=
391 (ErrorStatus = AudioSpecificConfig_Parse(
392 pAscDummy, &tmpBs, 1, pTpDecCallbacks, configMode,
393 configChanged, AOT_NULL_OBJECT)))
394 goto bail;
395 }
396
397 /* The field p_linfo->m_ascLen could be wrong, so check if */
398 if (0 > (INT)FDKgetValidBits(&tmpBs)) {
399 ErrorStatus = TRANSPORTDEC_PARSE_ERROR;
400 goto bail;
401 }
402 FDKpushFor(bs, ascLen); /* position bitstream after ASC */
403 } else {
404 /* Read ASC */
405 if (pLatmDemux->applyAsc) {
406 if (TRANSPORTDEC_OK != (ErrorStatus = AudioSpecificConfig_Parse(
407 &pAsc[TPDEC_TRACKINDEX(prog, lay)],
408 bs, 0, pTpDecCallbacks, configMode,
409 configChanged, AOT_NULL_OBJECT)))
410 goto bail;
411 } else {
412 if (TRANSPORTDEC_OK !=
413 (ErrorStatus = AudioSpecificConfig_Parse(
414 pAscDummy, bs, 0, pTpDecCallbacks, configMode,
415 configChanged, AOT_NULL_OBJECT)))
416 goto bail;
417 }
418 }
419 if (!pLatmDemux->applyAsc) {
420 updateConfig[TPDEC_TRACKINDEX(prog, lay)] = 0;
421 } else {
422 updateConfig[TPDEC_TRACKINDEX(prog, lay)] = 1;
423 }
424
425 if (!pLatmDemux->applyAsc) {
426 if (pAscDummy[TPDEC_TRACKINDEX(prog, lay)].m_aot ==
427 AOT_USAC) { /* flush in case SMC has changed */
428 const UINT usacConfigLength =
429 (UINT)(pAscDummy->m_sc.m_usacConfig.UsacConfigBits + 7) >> 3;
430 if (usacConfigLength > TP_USAC_MAX_CONFIG_LEN) {
431 ErrorStatus = TRANSPORTDEC_PARSE_ERROR;
432 goto bail;
433 }
434 if (usacConfigLength != usacConfigLengthPrev) {
435 FDKmemclear(&pAsc[TPDEC_TRACKINDEX(prog, lay)]
436 .m_sc.m_usacConfig.UsacConfig,
437 TP_USAC_MAX_CONFIG_LEN);
438 FDKmemcpy(&pAsc[TPDEC_TRACKINDEX(prog, lay)]
439 .m_sc.m_usacConfig.UsacConfig,
440 &pAscDummy->m_sc.m_usacConfig.UsacConfig,
441 usacConfigLength); /* store new USAC config */
442 pAsc[TPDEC_TRACKINDEX(prog, lay)]
443 .m_sc.m_usacConfig.UsacConfigBits =
444 pAscDummy->m_sc.m_usacConfig.UsacConfigBits;
445 pLatmDemux->usacExplicitCfgChanged = 1;
446 } else {
447 if (FDKmemcmp(usacConfigPrev,
448 pAscDummy->m_sc.m_usacConfig.UsacConfig,
449 usacConfigLengthPrev)) {
450 FDKmemclear(&pAsc[TPDEC_TRACKINDEX(prog, lay)]
451 .m_sc.m_usacConfig.UsacConfig,
452 TP_USAC_MAX_CONFIG_LEN);
453 FDKmemcpy(&pAsc[TPDEC_TRACKINDEX(prog, lay)]
454 .m_sc.m_usacConfig.UsacConfig,
455 &pAscDummy->m_sc.m_usacConfig.UsacConfig,
456 usacConfigLength); /* store new USAC config */
457 pAsc[TPDEC_TRACKINDEX(prog, lay)]
458 .m_sc.m_usacConfig.UsacConfigBits =
459 pAscDummy->m_sc.m_usacConfig.UsacConfigBits;
460 pLatmDemux->usacExplicitCfgChanged = 1;
461 }
462 }
463
464 if (pAscDummy[TPDEC_TRACKINDEX(prog, lay)]
465 .m_sc.m_usacConfig.m_usacNumElements) {
466 if (pAscDummy[TPDEC_TRACKINDEX(prog, lay)]
467 .m_sc.m_usacConfig.element[0]
468 .extElement.usacExtElementHasAudioPreRoll) {
469 pLatmDemux->newCfgHasAudioPreRoll =
470 1; /* if dummy parsed cfg has audioPreRoll we first flush
471 before applying new cfg */
472 }
473 }
474 }
475 }
476 }
477
478 p_linfo->m_frameLengthType = FDKreadBits(bs, 3);
479 switch (p_linfo->m_frameLengthType) {
480 case 0:
481 p_linfo->m_bufferFullness = FDKreadBits(bs, 8);
482
483 if (!pLatmDemux->m_allStreamsSameTimeFraming) {
484 if ((lay > 0) &&
485 (pAsc[TPDEC_TRACKINDEX(prog, lay)].m_aot == AOT_AAC_SCAL ||
486 pAsc[TPDEC_TRACKINDEX(prog, lay)].m_aot ==
487 AOT_ER_AAC_SCAL) &&
488 (pAsc[TPDEC_TRACKINDEX(prog, lay - 1)].m_aot == AOT_CELP ||
489 pAsc[TPDEC_TRACKINDEX(prog, lay - 1)].m_aot ==
490 AOT_ER_CELP)) { /* The layer maybe
491 ignored later so
492 read it anyway: */
493 /* coreFrameOffset = */ FDKreadBits(bs, 6);
494 }
495 }
496 break;
497 case 1:
498 p_linfo->m_frameLengthInBits = FDKreadBits(bs, 9);
499 break;
500 case 3:
501 case 4:
502 case 5:
503 /* CELP */
504 case 6:
505 case 7:
506 /* HVXC */
507 default:
508 ErrorStatus = TRANSPORTDEC_PARSE_ERROR;
509 goto bail;
510 } /* switch framelengthtype*/
511
512 } /* layer loop */
513 } /* prog loop */
514
515 pLatmDemux->m_otherDataPresent = FDKreadBits(bs, 1);
516 pLatmDemux->m_otherDataLength = 0;
517
518 if (pLatmDemux->m_otherDataPresent) {
519 if (pLatmDemux->m_AudioMuxVersion == 1) {
520 pLatmDemux->m_otherDataLength = CLatmDemux_GetValue(bs);
521 } else {
522 int otherDataLenEsc = 0;
523 do {
524 pLatmDemux->m_otherDataLength <<= 8; // *= 256
525 otherDataLenEsc = FDKreadBits(bs, 1);
526 pLatmDemux->m_otherDataLength += FDKreadBits(bs, 8);
527 } while (otherDataLenEsc);
528 }
529 if (pLatmDemux->m_audioMuxLengthBytes <
530 (pLatmDemux->m_otherDataLength >> 3)) {
531 ErrorStatus = TRANSPORTDEC_PARSE_ERROR;
532 goto bail;
533 }
534 }
535
536 pLatmDemux->m_crcCheckPresent = FDKreadBits(bs, 1);
537
538 if (pLatmDemux->m_crcCheckPresent) {
539 FDKreadBits(bs, 8);
540 }
541
542 } else {
543 /* audioMuxVersionA > 0 is reserved for future extensions */
544 ErrorStatus = TRANSPORTDEC_UNSUPPORTED_FORMAT;
545 }
546
547 /* Configure source decoder: */
548 if (ErrorStatus == TRANSPORTDEC_OK) {
549 UINT prog;
550 for (prog = 0; prog < pLatmDemux->m_numProgram; prog++) {
551 UINT lay;
552 for (lay = 0; lay < pLatmDemux->m_numLayer[prog]; lay++) {
553 if (updateConfig[TPDEC_TRACKINDEX(prog, lay)] != 0) {
554 int cbError;
555 cbError = pTpDecCallbacks->cbUpdateConfig(
556 pTpDecCallbacks->cbUpdateConfigData,
557 &pAsc[TPDEC_TRACKINDEX(prog, lay)],
558 pAsc[TPDEC_TRACKINDEX(prog, lay)].configMode,
559 &pAsc[TPDEC_TRACKINDEX(prog, lay)].AacConfigChanged);
560 if (cbError == TRANSPORTDEC_NEED_TO_RESTART) {
561 *pfConfigFound = 0;
562 ErrorStatus = TRANSPORTDEC_NEED_TO_RESTART;
563 goto bail;
564 }
565 if (cbError != 0) {
566 *pfConfigFound = 0;
567 if (lay == 0) {
568 ErrorStatus = TRANSPORTDEC_SYNC_ERROR;
569 goto bail;
570 }
571 } else {
572 *pfConfigFound = 1;
573 }
574 } else {
575 *pfConfigFound = 1;
576 }
577 }
578 }
579 }
580
581 bail:
582 if (ErrorStatus != TRANSPORTDEC_OK) {
583 UCHAR applyAsc = pLatmDemux->applyAsc;
584 FDKmemclear(pLatmDemux, sizeof(CLatmDemux)); /* reset structure */
585 pLatmDemux->applyAsc = applyAsc;
586 } else {
587 /* no error and config parsing is finished */
588 if (configMode == AC_CM_ALLOC_MEM) pLatmDemux->applyAsc = 0;
589 }
590
591 return (ErrorStatus);
592 }
593
CLatmDemux_ReadPayloadLengthInfo(HANDLE_FDK_BITSTREAM bs,CLatmDemux * pLatmDemux)594 TRANSPORTDEC_ERROR CLatmDemux_ReadPayloadLengthInfo(HANDLE_FDK_BITSTREAM bs,
595 CLatmDemux *pLatmDemux) {
596 TRANSPORTDEC_ERROR ErrorStatus = TRANSPORTDEC_OK;
597 int totalPayloadBits = 0;
598
599 if (pLatmDemux->m_allStreamsSameTimeFraming == 1) {
600 FDK_ASSERT(pLatmDemux->m_numProgram <= LATM_MAX_PROG);
601 for (UINT prog = 0; prog < pLatmDemux->m_numProgram; prog++) {
602 FDK_ASSERT(pLatmDemux->m_numLayer[prog] <= LATM_MAX_LAYER);
603 for (UINT lay = 0; lay < pLatmDemux->m_numLayer[prog]; lay++) {
604 LATM_LAYER_INFO *p_linfo = &pLatmDemux->m_linfo[prog][lay];
605
606 switch (p_linfo->m_frameLengthType) {
607 case 0:
608 p_linfo->m_frameLengthInBits = CLatmDemux_ReadAuChunkLengthInfo(bs);
609 totalPayloadBits += p_linfo->m_frameLengthInBits;
610 break;
611 case 3:
612 case 5:
613 case 7:
614 default:
615 return TRANSPORTDEC_PARSE_ERROR; // AAC_DEC_LATM_INVALIDFRAMELENGTHTYPE;
616 }
617 }
618 }
619 } else {
620 ErrorStatus = TRANSPORTDEC_PARSE_ERROR; // AAC_DEC_LATM_TIMEFRAMING;
621 }
622 if (pLatmDemux->m_audioMuxLengthBytes > (UINT)0 &&
623 totalPayloadBits > (int)pLatmDemux->m_audioMuxLengthBytes * 8) {
624 return TRANSPORTDEC_PARSE_ERROR;
625 }
626
627 return (ErrorStatus);
628 }
629
CLatmDemux_ReadAuChunkLengthInfo(HANDLE_FDK_BITSTREAM bs)630 int CLatmDemux_ReadAuChunkLengthInfo(HANDLE_FDK_BITSTREAM bs) {
631 UCHAR endFlag;
632 int len = 0;
633
634 do {
635 UCHAR tmp = (UCHAR)FDKreadBits(bs, 8);
636 endFlag = (tmp < 255);
637
638 len += tmp;
639
640 } while (endFlag == 0);
641
642 len <<= 3; /* convert from bytes to bits */
643
644 return len;
645 }
646
CLatmDemux_GetFrameLengthInBits(CLatmDemux * pLatmDemux,const UINT prog,const UINT layer)647 UINT CLatmDemux_GetFrameLengthInBits(CLatmDemux *pLatmDemux, const UINT prog,
648 const UINT layer) {
649 UINT nFrameLenBits = 0;
650 if (prog < pLatmDemux->m_numProgram) {
651 if (layer < pLatmDemux->m_numLayer[prog]) {
652 nFrameLenBits = pLatmDemux->m_linfo[prog][layer].m_frameLengthInBits;
653 }
654 }
655 return nFrameLenBits;
656 }
657
CLatmDemux_GetOtherDataPresentFlag(CLatmDemux * pLatmDemux)658 UINT CLatmDemux_GetOtherDataPresentFlag(CLatmDemux *pLatmDemux) {
659 return pLatmDemux->m_otherDataPresent ? 1 : 0;
660 }
661
CLatmDemux_GetOtherDataLength(CLatmDemux * pLatmDemux)662 UINT CLatmDemux_GetOtherDataLength(CLatmDemux *pLatmDemux) {
663 return pLatmDemux->m_otherDataLength;
664 }
665
CLatmDemux_GetNrOfSubFrames(CLatmDemux * pLatmDemux)666 UINT CLatmDemux_GetNrOfSubFrames(CLatmDemux *pLatmDemux) {
667 return pLatmDemux->m_noSubFrames;
668 }
669
CLatmDemux_GetNrOfLayers(CLatmDemux * pLatmDemux,const UINT prog)670 UINT CLatmDemux_GetNrOfLayers(CLatmDemux *pLatmDemux, const UINT prog) {
671 UINT numLayer = 0;
672 if (prog < pLatmDemux->m_numProgram) {
673 numLayer = pLatmDemux->m_numLayer[prog];
674 }
675 return numLayer;
676 }
677