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 /************************* Fast MPEG AAC Audio Encoder **********************
85
86 Initial author: A. Groeschel
87 contents/description: channel mapping functionality
88
89 ******************************************************************************/
90
91 #include "channel_map.h"
92 #include "bitenc.h"
93 #include "psy_const.h"
94 #include "qc_data.h"
95 #include "aacEnc_ram.h"
96
97
98 /* channel_assignment treats the relationship of Input file channels
99 to the encoder channels.
100 This is necessary because the usual order in RIFF files (.wav)
101 is different from the elements order in the coder given
102 by Table 8.1 (implicit speaker mapping) of the AAC standard.
103
104 In mono and stereo case, this is trivial.
105 In mc case, it looks like this:
106
107 Channel Input file coder chan
108 5ch:
109 front center 2 0 (SCE channel)
110 left center 0 1 (1st of 1st CPE)
111 right center 1 2 (2nd of 1st CPE)
112 left surround 3 3 (1st of 2nd CPE)
113 right surround 4 4 (2nd of 2nd CPE)
114
115 5.1ch:
116 front center 2 0 (SCE channel)
117 left center 0 1 (1st of 1st CPE)
118 right center 1 2 (2nd of 1st CPE)
119 left surround 4 3 (1st of 2nd CPE)
120 right surround 5 4 (2nd of 2nd CPE)
121 LFE 3 5 (LFE)
122 */
123
124 typedef struct {
125
126 CHANNEL_MODE encoderMode;
127 INT channel_assignment[/*(8)*/12];
128
129 } CHANNEL_ASSIGNMENT_INFO_TAB;
130
131
132 static const CHANNEL_ASSIGNMENT_INFO_TAB assignmentInfoTabMpeg[] =
133 {
134 { MODE_INVALID, {-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1} }, /* invalid */
135 { MODE_1, { 0,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1} }, /* mono */
136 { MODE_2, { 0, 1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1} }, /* stereo */
137 { MODE_1_2, { 0, 1, 2,-1,-1,-1,-1,-1,-1,-1,-1,-1} }, /* 3ch */
138 { MODE_1_2_1, { 0, 1, 2, 3,-1,-1,-1,-1,-1,-1,-1,-1} }, /* 4ch */
139 { MODE_1_2_2, { 0, 1, 2, 3, 4,-1,-1,-1,-1,-1,-1,-1} }, /* 5ch */
140 { MODE_1_2_2_1, { 0, 1, 2, 3, 4, 5,-1,-1,-1,-1,-1,-1} }, /* 5.1ch */
141 { MODE_1_2_2_2_1, { 0, 1, 2, 3, 4, 5, 6, 7,-1,-1,-1,-1} }, /* 7.1ch */
142 { MODE_7_1_REAR_SURROUND, { 0, 1, 2, 3, 4, 5, 6, 7,-1,-1,-1,-1} }, /* 7.1ch */
143 { MODE_7_1_FRONT_CENTER, { 0, 1, 2, 3, 4, 5, 6, 7,-1,-1,-1,-1} } /* 7.1ch */
144 };
145
146 static const CHANNEL_ASSIGNMENT_INFO_TAB assignmentInfoTabWav[] =
147 {
148 { MODE_INVALID, {-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1} }, /* invalid */
149 { MODE_1, { 0,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1} }, /* mono */
150 { MODE_2, { 0, 1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1} }, /* stereo */
151 { MODE_1_2, { 2, 0, 1,-1,-1,-1,-1,-1,-1,-1,-1,-1} }, /* 3ch */
152 { MODE_1_2_1, { 2, 0, 1, 3,-1,-1,-1,-1,-1,-1,-1,-1} }, /* 4ch */
153 { MODE_1_2_2, { 2, 0, 1, 3, 4,-1,-1,-1,-1,-1,-1,-1} }, /* 5ch */
154 { MODE_1_2_2_1, { 2, 0, 1, 4, 5, 3,-1,-1,-1,-1,-1,-1} }, /* 5.1ch */
155 { MODE_1_2_2_2_1, { 2, 6, 7, 0, 1, 4, 5, 3,-1,-1,-1,-1} }, /* 7.1ch */
156 { MODE_7_1_REAR_SURROUND, { 2, 0, 1, 6, 7, 4, 5, 3,-1,-1,-1,-1} }, /* 7.1ch */
157 { MODE_7_1_FRONT_CENTER, { 2, 6, 7, 0, 1, 4, 5, 3,-1,-1,-1,-1} }, /* 7.1ch */
158 };
159
160 /* Channel mode configuration tab provides,
161 corresponding number of channels and elements
162 */
163 static const CHANNEL_MODE_CONFIG_TAB channelModeConfig[] =
164 {
165 { MODE_1, 1, 1, 1 }, /* SCE */
166 { MODE_2, 2, 2, 1 }, /* CPE */
167 { MODE_1_2, 3, 3, 2 }, /* SCE,CPE */
168 { MODE_1_2_1, 4, 4, 3 }, /* SCE,CPE,SCE */
169 { MODE_1_2_2, 5, 5, 3 }, /* SCE,CPE,CPE */
170 { MODE_1_2_2_1, 6, 5, 4 }, /* SCE,CPE,CPE,LFE */
171 { MODE_1_2_2_2_1, 8, 7, 5 }, /* SCE,CPE,CPE,CPE,LFE */
172 { MODE_7_1_REAR_SURROUND, 8, 7, 5 },
173 { MODE_7_1_FRONT_CENTER, 8, 7, 5 },
174 };
175
176 #define MAX_MODES (sizeof(assignmentInfoTabWav)/sizeof(CHANNEL_ASSIGNMENT_INFO_TAB))
177
FDKaacEnc_getChannelAssignment(CHANNEL_MODE encMode,CHANNEL_ORDER co)178 const INT* FDKaacEnc_getChannelAssignment(CHANNEL_MODE encMode, CHANNEL_ORDER co)
179 {
180 const CHANNEL_ASSIGNMENT_INFO_TAB *pTab;
181 int i;
182
183 if (co == CH_ORDER_MPEG)
184 pTab = assignmentInfoTabMpeg;
185 else
186 pTab = assignmentInfoTabWav;
187
188 for(i=MAX_MODES-1; i>0; i--) {
189 if (encMode== pTab[i].encoderMode) {
190 break;
191 }
192 }
193 return (pTab[i].channel_assignment);
194 }
195
FDKaacEnc_DetermineEncoderMode(CHANNEL_MODE * mode,INT nChannels)196 AAC_ENCODER_ERROR FDKaacEnc_DetermineEncoderMode(CHANNEL_MODE* mode, INT nChannels)
197 {
198 INT i;
199 CHANNEL_MODE encMode = MODE_INVALID;
200
201 if (*mode==MODE_UNKNOWN) {
202 for (i=0; i<(INT)sizeof(channelModeConfig)/(INT)sizeof(CHANNEL_MODE_CONFIG_TAB); i++) {
203 if (channelModeConfig[i].nChannels==nChannels) {
204 encMode = channelModeConfig[i].encMode;
205 break;
206 }
207 }
208 *mode = encMode;
209 }
210 else {
211 /* check if valid channel configuration */
212 if (FDKaacEnc_GetChannelModeConfiguration(*mode)->nChannels==nChannels) {
213 encMode = *mode;
214 }
215 }
216
217 if (encMode==MODE_INVALID) {
218 return AAC_ENC_UNSUPPORTED_CHANNELCONFIG;
219 }
220
221 return AAC_ENC_OK;
222 }
223
FDKaacEnc_initElement(ELEMENT_INFO * elInfo,MP4_ELEMENT_ID elType,INT * cnt,CHANNEL_MODE mode,CHANNEL_ORDER co,INT * it_cnt,const FIXP_DBL relBits)224 static INT FDKaacEnc_initElement (ELEMENT_INFO* elInfo, MP4_ELEMENT_ID elType, INT* cnt, CHANNEL_MODE mode, CHANNEL_ORDER co, INT* it_cnt, const FIXP_DBL relBits) {
225
226 INT error=0;
227 INT counter =*cnt;
228
229 const INT *assign = FDKaacEnc_getChannelAssignment(mode, co);
230
231 elInfo->elType=elType;
232 elInfo->relativeBits = relBits;
233
234 switch(elInfo->elType) {
235 case ID_SCE: case ID_LFE: case ID_CCE:
236 elInfo->nChannelsInEl=1;
237 elInfo->ChannelIndex[0]=assign[counter++];
238 elInfo->instanceTag=it_cnt[elType]++;
239
240 break;
241 case ID_CPE:
242 elInfo->nChannelsInEl=2;
243 elInfo->ChannelIndex[0]=assign[counter++];
244 elInfo->ChannelIndex[1]=assign[counter++];
245 elInfo->instanceTag=it_cnt[elType]++;
246 break;
247 case ID_DSE:
248 elInfo->nChannelsInEl=0;
249 elInfo->ChannelIndex[0]=0;
250 elInfo->ChannelIndex[1]=0;
251 elInfo->instanceTag=it_cnt[elType]++;
252 break;
253 default: error=1;
254 };
255 *cnt = counter;
256 return error;
257
258 }
259
FDKaacEnc_InitChannelMapping(CHANNEL_MODE mode,CHANNEL_ORDER co,CHANNEL_MAPPING * cm)260 AAC_ENCODER_ERROR FDKaacEnc_InitChannelMapping(CHANNEL_MODE mode, CHANNEL_ORDER co, CHANNEL_MAPPING* cm)
261 {
262 INT count=0; /* count through coder channels */
263 INT it_cnt[ID_END+1];
264 INT i;
265
266 for (i=0; i<ID_END; i++)
267 it_cnt[i]=0;
268
269 FDKmemclear(cm, sizeof(CHANNEL_MAPPING));
270
271 /* init channel mapping*/
272 for (i=0; i<(INT)sizeof(channelModeConfig)/(INT)sizeof(CHANNEL_MODE_CONFIG_TAB); i++) {
273 if (channelModeConfig[i].encMode==mode)
274 {
275 cm->encMode = channelModeConfig[i].encMode;
276 cm->nChannels = channelModeConfig[i].nChannels;
277 cm->nChannelsEff = channelModeConfig[i].nChannelsEff;
278 cm->nElements = channelModeConfig[i].nElements;
279
280 break;
281 }
282 }
283
284 /* init element info struct */
285 switch(mode) {
286 case MODE_1:
287 /* (mono) sce */
288 FDKaacEnc_initElement(&cm->elInfo[0], ID_SCE, &count, mode, co, it_cnt, (FIXP_DBL)MAXVAL_DBL);
289 break;
290 case MODE_2:
291 /* (stereo) cpe */
292 FDKaacEnc_initElement(&cm->elInfo[0], ID_CPE, &count, mode, co, it_cnt, (FIXP_DBL)MAXVAL_DBL);
293 break;
294
295 case MODE_1_2:
296 /* sce + cpe */
297 FDKaacEnc_initElement(&cm->elInfo[0], ID_SCE, &count, mode, co, it_cnt, FL2FXCONST_DBL(0.4f));
298 FDKaacEnc_initElement(&cm->elInfo[1], ID_CPE, &count, mode, co, it_cnt, FL2FXCONST_DBL(0.6f));
299 break;
300
301 case MODE_1_2_1:
302 /* sce + cpe + sce */
303 FDKaacEnc_initElement(&cm->elInfo[0], ID_SCE, &count, mode, co, it_cnt, FL2FXCONST_DBL(0.3f));
304 FDKaacEnc_initElement(&cm->elInfo[1], ID_CPE, &count, mode, co, it_cnt, FL2FXCONST_DBL(0.4f));
305 FDKaacEnc_initElement(&cm->elInfo[2], ID_SCE, &count, mode, co, it_cnt, FL2FXCONST_DBL(0.3f));
306 break;
307
308 case MODE_1_2_2:
309 /* sce + cpe + cpe */
310 FDKaacEnc_initElement(&cm->elInfo[0], ID_SCE, &count, mode, co, it_cnt, FL2FXCONST_DBL(0.26f));
311 FDKaacEnc_initElement(&cm->elInfo[1], ID_CPE, &count, mode, co, it_cnt, FL2FXCONST_DBL(0.37f));
312 FDKaacEnc_initElement(&cm->elInfo[2], ID_CPE, &count, mode, co, it_cnt, FL2FXCONST_DBL(0.37f));
313 break;
314
315 case MODE_1_2_2_1:
316 /* (5.1) sce + cpe + cpe + lfe */
317 FDKaacEnc_initElement(&cm->elInfo[0], ID_SCE, &count, mode, co, it_cnt, FL2FXCONST_DBL(0.24f));
318 FDKaacEnc_initElement(&cm->elInfo[1], ID_CPE, &count, mode, co, it_cnt, FL2FXCONST_DBL(0.35f));
319 FDKaacEnc_initElement(&cm->elInfo[2], ID_CPE, &count, mode, co, it_cnt, FL2FXCONST_DBL(0.35f));
320 FDKaacEnc_initElement(&cm->elInfo[3], ID_LFE, &count, mode, co, it_cnt, FL2FXCONST_DBL(0.06f));
321 break;
322
323 case MODE_1_2_2_2_1:
324 case MODE_7_1_REAR_SURROUND:
325 case MODE_7_1_FRONT_CENTER:
326 /* (7.1) sce + cpe + cpe + cpe + lfe */
327 FDKaacEnc_initElement(&cm->elInfo[0], ID_SCE, &count, mode, co, it_cnt, FL2FXCONST_DBL(0.18f));
328 FDKaacEnc_initElement(&cm->elInfo[1], ID_CPE, &count, mode, co, it_cnt, FL2FXCONST_DBL(0.26f));
329 FDKaacEnc_initElement(&cm->elInfo[2], ID_CPE, &count, mode, co, it_cnt, FL2FXCONST_DBL(0.26f));
330 FDKaacEnc_initElement(&cm->elInfo[3], ID_CPE, &count, mode, co, it_cnt, FL2FXCONST_DBL(0.26f));
331 FDKaacEnc_initElement(&cm->elInfo[4], ID_LFE, &count, mode, co, it_cnt, FL2FXCONST_DBL(0.04f));
332 break;
333 default:
334 //*chMap=0;
335 return AAC_ENC_UNSUPPORTED_CHANNELCONFIG;
336 };
337
338
339 FDK_ASSERT(cm->nElements<=(8));
340
341
342 return AAC_ENC_OK;
343 }
344
FDKaacEnc_InitElementBits(QC_STATE * hQC,CHANNEL_MAPPING * cm,INT bitrateTot,INT averageBitsTot,INT maxChannelBits)345 AAC_ENCODER_ERROR FDKaacEnc_InitElementBits(QC_STATE *hQC,
346 CHANNEL_MAPPING *cm,
347 INT bitrateTot,
348 INT averageBitsTot,
349 INT maxChannelBits)
350 {
351 int sc_brTot = CountLeadingBits(bitrateTot);
352
353 switch(cm->encMode) {
354 case MODE_1:
355 hQC->elementBits[0]->chBitrateEl = bitrateTot;
356
357 hQC->elementBits[0]->maxBitsEl = maxChannelBits;
358
359 hQC->elementBits[0]->relativeBitsEl = cm->elInfo[0].relativeBits;
360 break;
361
362 case MODE_2:
363 hQC->elementBits[0]->chBitrateEl = bitrateTot>>1;
364
365 hQC->elementBits[0]->maxBitsEl = 2*maxChannelBits;
366
367 hQC->elementBits[0]->relativeBitsEl = cm->elInfo[0].relativeBits;
368 break;
369 case MODE_1_2: {
370 hQC->elementBits[0]->relativeBitsEl = cm->elInfo[0].relativeBits;
371 hQC->elementBits[1]->relativeBitsEl = cm->elInfo[1].relativeBits;
372 FIXP_DBL sceRate = cm->elInfo[0].relativeBits;
373 FIXP_DBL cpeRate = cm->elInfo[1].relativeBits;
374
375 hQC->elementBits[0]->chBitrateEl = fMult(sceRate, (FIXP_DBL)(bitrateTot<<sc_brTot))>>sc_brTot;
376 hQC->elementBits[1]->chBitrateEl = fMult(cpeRate, (FIXP_DBL)(bitrateTot<<sc_brTot))>>(sc_brTot+1);
377
378 hQC->elementBits[0]->maxBitsEl = maxChannelBits;
379 hQC->elementBits[1]->maxBitsEl = 2*maxChannelBits;
380 break;
381 }
382 case MODE_1_2_1: {
383 /* sce + cpe + sce */
384 hQC->elementBits[0]->relativeBitsEl = cm->elInfo[0].relativeBits;
385 hQC->elementBits[1]->relativeBitsEl = cm->elInfo[1].relativeBits;
386 hQC->elementBits[2]->relativeBitsEl = cm->elInfo[2].relativeBits;
387 FIXP_DBL sce1Rate = cm->elInfo[0].relativeBits;
388 FIXP_DBL cpeRate = cm->elInfo[1].relativeBits;
389 FIXP_DBL sce2Rate = cm->elInfo[2].relativeBits;
390
391 hQC->elementBits[0]->chBitrateEl = fMult(sce1Rate, (FIXP_DBL)(bitrateTot<<sc_brTot))>>sc_brTot;
392 hQC->elementBits[1]->chBitrateEl = fMult(cpeRate, (FIXP_DBL)(bitrateTot<<sc_brTot))>>(sc_brTot+1);
393 hQC->elementBits[2]->chBitrateEl = fMult(sce2Rate, (FIXP_DBL)(bitrateTot<<sc_brTot))>>sc_brTot;
394
395 hQC->elementBits[0]->maxBitsEl = maxChannelBits;
396 hQC->elementBits[1]->maxBitsEl = 2*maxChannelBits;
397 hQC->elementBits[2]->maxBitsEl = maxChannelBits;
398 break;
399 }
400 case MODE_1_2_2: {
401 /* sce + cpe + cpe */
402 hQC->elementBits[0]->relativeBitsEl = cm->elInfo[0].relativeBits;
403 hQC->elementBits[1]->relativeBitsEl = cm->elInfo[1].relativeBits;
404 hQC->elementBits[2]->relativeBitsEl = cm->elInfo[2].relativeBits;
405 FIXP_DBL sceRate = cm->elInfo[0].relativeBits;
406 FIXP_DBL cpe1Rate = cm->elInfo[1].relativeBits;
407 FIXP_DBL cpe2Rate = cm->elInfo[2].relativeBits;
408
409 hQC->elementBits[0]->chBitrateEl = fMult(sceRate, (FIXP_DBL)(bitrateTot<<sc_brTot))>>sc_brTot;
410 hQC->elementBits[1]->chBitrateEl = fMult(cpe1Rate, (FIXP_DBL)(bitrateTot<<sc_brTot))>>(sc_brTot+1);
411 hQC->elementBits[2]->chBitrateEl = fMult(cpe2Rate, (FIXP_DBL)(bitrateTot<<sc_brTot))>>(sc_brTot+1);
412
413 hQC->elementBits[0]->maxBitsEl = maxChannelBits;
414 hQC->elementBits[1]->maxBitsEl = 2*maxChannelBits;
415 hQC->elementBits[2]->maxBitsEl = 2*maxChannelBits;
416 break;
417 }
418
419 case MODE_1_2_2_1: {
420 /* (5.1) sce + cpe + cpe + lfe */
421 hQC->elementBits[0]->relativeBitsEl = cm->elInfo[0].relativeBits;
422 hQC->elementBits[1]->relativeBitsEl = cm->elInfo[1].relativeBits;
423 hQC->elementBits[2]->relativeBitsEl = cm->elInfo[2].relativeBits;
424 hQC->elementBits[3]->relativeBitsEl = cm->elInfo[3].relativeBits;
425 FIXP_DBL sceRate = cm->elInfo[0].relativeBits;
426 FIXP_DBL cpe1Rate = cm->elInfo[1].relativeBits;
427 FIXP_DBL cpe2Rate = cm->elInfo[2].relativeBits;
428 FIXP_DBL lfeRate = cm->elInfo[3].relativeBits;
429
430 int maxBitsTot = maxChannelBits * 5; /* LFE does not add to bit reservoir */
431 int sc = CountLeadingBits(fixMax(maxChannelBits,averageBitsTot));
432 int maxLfeBits = (int) FDKmax ( (INT)((fMult(lfeRate,(FIXP_DBL)(maxChannelBits<<sc))>>sc)<<1),
433 (INT)((fMult(FL2FXCONST_DBL(1.1f/2.f),fMult(lfeRate,(FIXP_DBL)(averageBitsTot<<sc)))<<1)>>sc) );
434
435 maxChannelBits = (maxBitsTot - maxLfeBits);
436 sc = CountLeadingBits(maxChannelBits);
437
438 maxChannelBits = fMult((FIXP_DBL)maxChannelBits<<sc,GetInvInt(5))>>sc;
439
440 hQC->elementBits[0]->chBitrateEl = fMult(sceRate, (FIXP_DBL)(bitrateTot<<sc_brTot))>>sc_brTot;
441 hQC->elementBits[1]->chBitrateEl = fMult(cpe1Rate, (FIXP_DBL)(bitrateTot<<sc_brTot))>>(sc_brTot+1);
442 hQC->elementBits[2]->chBitrateEl = fMult(cpe2Rate, (FIXP_DBL)(bitrateTot<<sc_brTot))>>(sc_brTot+1);
443 hQC->elementBits[3]->chBitrateEl = fMult(lfeRate, (FIXP_DBL)(bitrateTot<<sc_brTot))>>sc_brTot;
444
445 hQC->elementBits[0]->maxBitsEl = maxChannelBits;
446 hQC->elementBits[1]->maxBitsEl = 2*maxChannelBits;
447 hQC->elementBits[2]->maxBitsEl = 2*maxChannelBits;
448 hQC->elementBits[3]->maxBitsEl = maxLfeBits;
449
450 break;
451 }
452 case MODE_7_1_REAR_SURROUND:
453 case MODE_7_1_FRONT_CENTER:
454 case MODE_1_2_2_2_1: {
455 int cpe3Idx = 3;
456 int lfeIdx = 4;
457
458 /* (7.1) sce + cpe + cpe + cpe + lfe */
459 FIXP_DBL sceRate = hQC->elementBits[0]->relativeBitsEl = cm->elInfo[0].relativeBits;
460 FIXP_DBL cpe1Rate = hQC->elementBits[1]->relativeBitsEl = cm->elInfo[1].relativeBits;
461 FIXP_DBL cpe2Rate = hQC->elementBits[2]->relativeBitsEl = cm->elInfo[2].relativeBits;
462 FIXP_DBL cpe3Rate = hQC->elementBits[cpe3Idx]->relativeBitsEl = cm->elInfo[cpe3Idx].relativeBits;
463 FIXP_DBL lfeRate = hQC->elementBits[lfeIdx]->relativeBitsEl = cm->elInfo[lfeIdx].relativeBits;
464
465 int maxBitsTot = maxChannelBits * 7; /* LFE does not add to bit reservoir */
466 int sc = CountLeadingBits(fixMax(maxChannelBits,averageBitsTot));
467 int maxLfeBits = (int) FDKmax ( (INT)((fMult(lfeRate,(FIXP_DBL)(maxChannelBits<<sc))>>sc)<<1),
468 (INT)((fMult(FL2FXCONST_DBL(1.1f/2.f),fMult(lfeRate,(FIXP_DBL)(averageBitsTot<<sc)))<<1)>>sc) );
469
470 maxChannelBits = (maxBitsTot - maxLfeBits) / 7;
471
472 hQC->elementBits[0]->chBitrateEl = fMult(sceRate, (FIXP_DBL)(bitrateTot<<sc_brTot))>>sc_brTot;
473 hQC->elementBits[1]->chBitrateEl = fMult(cpe1Rate, (FIXP_DBL)(bitrateTot<<sc_brTot))>>(sc_brTot+1);
474 hQC->elementBits[2]->chBitrateEl = fMult(cpe2Rate, (FIXP_DBL)(bitrateTot<<sc_brTot))>>(sc_brTot+1);
475 hQC->elementBits[cpe3Idx]->chBitrateEl = fMult(cpe3Rate, (FIXP_DBL)(bitrateTot<<sc_brTot))>>(sc_brTot+1);
476 hQC->elementBits[lfeIdx]->chBitrateEl = fMult(lfeRate, (FIXP_DBL)(bitrateTot<<sc_brTot))>>sc_brTot;
477
478 hQC->elementBits[0]->maxBitsEl = maxChannelBits;
479 hQC->elementBits[1]->maxBitsEl = 2*maxChannelBits;
480 hQC->elementBits[2]->maxBitsEl = 2*maxChannelBits;
481 hQC->elementBits[cpe3Idx]->maxBitsEl = 2*maxChannelBits;
482 hQC->elementBits[lfeIdx]->maxBitsEl = maxLfeBits;
483 break;
484 }
485 default:
486 return AAC_ENC_UNSUPPORTED_CHANNELCONFIG;
487 }
488
489 return AAC_ENC_OK;
490 }
491
492 /********************************************************************************/
493 /* */
494 /* function: GetMonoStereoMODE(const CHANNEL_MODE mode) */
495 /* */
496 /* description: Determines encoder setting from channel mode. */
497 /* Multichannel modes are mapped to mono or stereo modes */
498 /* returns MODE_MONO in case of mono, */
499 /* MODE_STEREO in case of stereo */
500 /* MODE_INVALID in case of error */
501 /* */
502 /* input: CHANNEL_MODE mode: Encoder mode (see qc_data.h). */
503 /* output: return: CM_STEREO_MODE monoStereoSetting */
504 /* (MODE_INVALID: error, */
505 /* MODE_MONO: mono */
506 /* MODE_STEREO: stereo). */
507 /* */
508 /* misc: No memory is allocated. */
509 /* */
510 /********************************************************************************/
511
FDKaacEnc_GetMonoStereoMode(const CHANNEL_MODE mode)512 ELEMENT_MODE FDKaacEnc_GetMonoStereoMode(const CHANNEL_MODE mode){
513
514 ELEMENT_MODE monoStereoSetting = EL_MODE_INVALID;
515
516 switch(mode){
517 case MODE_1: /* mono setups */
518 monoStereoSetting = EL_MODE_MONO;
519 break;
520 case MODE_2: /* stereo setups */
521 case MODE_1_2:
522 case MODE_1_2_1:
523 case MODE_1_2_2:
524 case MODE_1_2_2_1:
525 case MODE_1_2_2_2_1:
526 case MODE_7_1_REAR_SURROUND:
527 case MODE_7_1_FRONT_CENTER:
528 monoStereoSetting = EL_MODE_STEREO;
529 break;
530 default: /* error */
531 monoStereoSetting = EL_MODE_INVALID;
532 break;
533 }
534
535 return monoStereoSetting;
536 }
537
FDKaacEnc_GetChannelModeConfiguration(const CHANNEL_MODE mode)538 const CHANNEL_MODE_CONFIG_TAB* FDKaacEnc_GetChannelModeConfiguration(const CHANNEL_MODE mode)
539 {
540 INT i;
541 const CHANNEL_MODE_CONFIG_TAB *cm_config = NULL;
542
543 /* get channel mode config */
544 for (i=0; i<(INT)sizeof(channelModeConfig)/(INT)sizeof(CHANNEL_MODE_CONFIG_TAB); i++) {
545 if (channelModeConfig[i].encMode==mode)
546 {
547 cm_config = &channelModeConfig[i];
548 break;
549 }
550 }
551 return cm_config;
552 }
553