bitstream: move put_sbits() from flacenc.c to bitstream.h and use it
[libav.git] / libavcodec / vorbis_dec.c
CommitLineData
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1/**
2 * @file vorbis_dec.c
3 * Vorbis I decoder
4 * @author Denes Balatoni ( dbalatoni programozo hu )
5
6 * This file is part of FFmpeg.
7 *
8 * FFmpeg is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Lesser General Public
10 * License as published by the Free Software Foundation; either
11 * version 2.1 of the License, or (at your option) any later version.
12 *
13 * FFmpeg is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * Lesser General Public License for more details.
17 *
18 * You should have received a copy of the GNU Lesser General Public
19 * License along with FFmpeg; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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21 */
22
23#undef V_DEBUG
24//#define V_DEBUG
25//#define AV_DEBUG(...) av_log(NULL, AV_LOG_INFO, __VA_ARGS__)
26
27#include <math.h>
28
29#define ALT_BITSTREAM_READER_LE
30#include "avcodec.h"
31#include "bitstream.h"
32#include "dsputil.h"
33
34#include "vorbis.h"
35#include "xiph.h"
36
37#define V_NB_BITS 8
38#define V_NB_BITS2 11
39#define V_MAX_VLCS (1<<16)
40
41#ifndef V_DEBUG
42#define AV_DEBUG(...)
43#endif
44
45#undef NDEBUG
46#include <assert.h>
47
48typedef struct {
49 uint_fast8_t dimensions;
50 uint_fast8_t lookup_type;
51 uint_fast8_t maxdepth;
52 VLC vlc;
53 float *codevectors;
54 unsigned int nb_bits;
55} vorbis_codebook;
56
57typedef union vorbis_floor_u vorbis_floor_data;
58typedef struct vorbis_floor0_s vorbis_floor0;
59typedef struct vorbis_floor1_s vorbis_floor1;
60struct vorbis_context_s;
61typedef
62uint_fast8_t (* vorbis_floor_decode_func)
63 (struct vorbis_context_s *, vorbis_floor_data *, float *);
64typedef struct {
65 uint_fast8_t floor_type;
66 vorbis_floor_decode_func decode;
67 union vorbis_floor_u
68 {
69 struct vorbis_floor0_s
70 {
71 uint_fast8_t order;
72 uint_fast16_t rate;
73 uint_fast16_t bark_map_size;
74 int_fast32_t * map[2];
75 uint_fast32_t map_size[2];
76 uint_fast8_t amplitude_bits;
77 uint_fast8_t amplitude_offset;
78 uint_fast8_t num_books;
79 uint_fast8_t * book_list;
80 float * lsp;
81 } t0;
82 struct vorbis_floor1_s
83 {
84 uint_fast8_t partitions;
85 uint_fast8_t maximum_class;
86 uint_fast8_t partition_class[32];
87 uint_fast8_t class_dimensions[16];
88 uint_fast8_t class_subclasses[16];
89 uint_fast8_t class_masterbook[16];
90 int_fast16_t subclass_books[16][8];
91 uint_fast8_t multiplier;
92 uint_fast16_t x_list_dim;
93 floor1_entry_t * list;
94 } t1;
95 } data;
96} vorbis_floor;
97
98typedef struct {
99 uint_fast16_t type;
100 uint_fast32_t begin;
101 uint_fast32_t end;
102 uint_fast32_t partition_size;
103 uint_fast8_t classifications;
104 uint_fast8_t classbook;
105 int_fast16_t books[64][8];
106 uint_fast8_t maxpass;
107} vorbis_residue;
108
109typedef struct {
110 uint_fast8_t submaps;
111 uint_fast16_t coupling_steps;
112 uint_fast8_t *magnitude;
113 uint_fast8_t *angle;
114 uint_fast8_t *mux;
115 uint_fast8_t submap_floor[16];
116 uint_fast8_t submap_residue[16];
117} vorbis_mapping;
118
119typedef struct {
120 uint_fast8_t blockflag;
121 uint_fast16_t windowtype;
122 uint_fast16_t transformtype;
123 uint_fast8_t mapping;
124} vorbis_mode;
125
126typedef struct vorbis_context_s {
127 AVCodecContext *avccontext;
128 GetBitContext gb;
129 DSPContext dsp;
130
131 MDCTContext mdct[2];
132 uint_fast8_t first_frame;
133 uint_fast32_t version;
134 uint_fast8_t audio_channels;
135 uint_fast32_t audio_samplerate;
136 uint_fast32_t bitrate_maximum;
137 uint_fast32_t bitrate_nominal;
138 uint_fast32_t bitrate_minimum;
139 uint_fast32_t blocksize[2];
140 const float * win[2];
141 uint_fast16_t codebook_count;
142 vorbis_codebook *codebooks;
143 uint_fast8_t floor_count;
144 vorbis_floor *floors;
145 uint_fast8_t residue_count;
146 vorbis_residue *residues;
147 uint_fast8_t mapping_count;
148 vorbis_mapping *mappings;
149 uint_fast8_t mode_count;
150 vorbis_mode *modes;
151 uint_fast8_t mode_number; // mode number for the current packet
152 float *channel_residues;
153 float *channel_floors;
154 float *saved;
155 uint_fast16_t saved_start;
156 float *ret;
157 float *buf;
158 float *buf_tmp;
159 uint_fast32_t add_bias; // for float->int conversion
160 uint_fast32_t exp_bias;
161} vorbis_context;
162
163/* Helper functions */
164
165#define BARK(x) \
166 (13.1f*atan(0.00074f*(x))+2.24f*atan(1.85e-8f*(x)*(x))+1e-4f*(x))
167
168static float vorbisfloat2float(uint_fast32_t val) {
169 double mant=val&0x1fffff;
170 long exp=(val&0x7fe00000L)>>21;
171 if (val&0x80000000) mant=-mant;
a5c0969a 172 return ldexp(mant, exp - 20 - 768);
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173}
174
175
176// Free all allocated memory -----------------------------------------
177
178static void vorbis_free(vorbis_context *vc) {
179 int_fast16_t i;
180
181 av_freep(&vc->channel_residues);
182 av_freep(&vc->channel_floors);
183 av_freep(&vc->saved);
184 av_freep(&vc->ret);
185 av_freep(&vc->buf);
186 av_freep(&vc->buf_tmp);
187
188 av_freep(&vc->residues);
189 av_freep(&vc->modes);
190
191 ff_mdct_end(&vc->mdct[0]);
192 ff_mdct_end(&vc->mdct[1]);
193
194 for(i=0;i<vc->codebook_count;++i) {
195 av_free(vc->codebooks[i].codevectors);
196 free_vlc(&vc->codebooks[i].vlc);
197 }
198 av_freep(&vc->codebooks);
199
200 for(i=0;i<vc->floor_count;++i) {
201 if(vc->floors[i].floor_type==0) {
202 av_free(vc->floors[i].data.t0.map[0]);
203 av_free(vc->floors[i].data.t0.map[1]);
204 av_free(vc->floors[i].data.t0.book_list);
205 av_free(vc->floors[i].data.t0.lsp);
206 }
207 else {
208 av_free(vc->floors[i].data.t1.list);
209 }
210 }
211 av_freep(&vc->floors);
212
213 for(i=0;i<vc->mapping_count;++i) {
214 av_free(vc->mappings[i].magnitude);
215 av_free(vc->mappings[i].angle);
216 av_free(vc->mappings[i].mux);
217 }
218 av_freep(&vc->mappings);
219
220 if(vc->exp_bias){
221 av_freep(&vc->win[0]);
222 av_freep(&vc->win[1]);
223 }
224}
225
226// Parse setup header -------------------------------------------------
227
228// Process codebooks part
229
230static int vorbis_parse_setup_hdr_codebooks(vorbis_context *vc) {
231 uint_fast16_t cb;
232 uint8_t *tmp_vlc_bits;
233 uint32_t *tmp_vlc_codes;
234 GetBitContext *gb=&vc->gb;
235
236 vc->codebook_count=get_bits(gb,8)+1;
237
238 AV_DEBUG(" Codebooks: %d \n", vc->codebook_count);
239
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240 vc->codebooks=av_mallocz(vc->codebook_count * sizeof(vorbis_codebook));
241 tmp_vlc_bits =av_mallocz(V_MAX_VLCS * sizeof(uint8_t));
242 tmp_vlc_codes=av_mallocz(V_MAX_VLCS * sizeof(uint32_t));
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243
244 for(cb=0;cb<vc->codebook_count;++cb) {
245 vorbis_codebook *codebook_setup=&vc->codebooks[cb];
246 uint_fast8_t ordered;
247 uint_fast32_t t, used_entries=0;
248 uint_fast32_t entries;
249
250 AV_DEBUG(" %d. Codebook \n", cb);
251
252 if (get_bits(gb, 24)!=0x564342) {
253 av_log(vc->avccontext, AV_LOG_ERROR, " %"PRIdFAST16". Codebook setup data corrupt. \n", cb);
254 goto error;
255 }
256
257 codebook_setup->dimensions=get_bits(gb, 16);
258 if (codebook_setup->dimensions>16) {
259 av_log(vc->avccontext, AV_LOG_ERROR, " %"PRIdFAST16". Codebook's dimension is too large (%d). \n", cb, codebook_setup->dimensions);
260 goto error;
261 }
262 entries=get_bits(gb, 24);
263 if (entries>V_MAX_VLCS) {
264 av_log(vc->avccontext, AV_LOG_ERROR, " %"PRIdFAST16". Codebook has too many entries (%"PRIdFAST32"). \n", cb, entries);
265 goto error;
266 }
267
268 ordered=get_bits1(gb);
269
270 AV_DEBUG(" codebook_dimensions %d, codebook_entries %d \n", codebook_setup->dimensions, entries);
271
272 if (!ordered) {
273 uint_fast16_t ce;
274 uint_fast8_t flag;
275 uint_fast8_t sparse=get_bits1(gb);
276
277 AV_DEBUG(" not ordered \n");
278
279 if (sparse) {
280 AV_DEBUG(" sparse \n");
281
282 used_entries=0;
283 for(ce=0;ce<entries;++ce) {
284 flag=get_bits1(gb);
285 if (flag) {
286 tmp_vlc_bits[ce]=get_bits(gb, 5)+1;
287 ++used_entries;
288 }
289 else tmp_vlc_bits[ce]=0;
290 }
291 } else {
292 AV_DEBUG(" not sparse \n");
293
294 used_entries=entries;
295 for(ce=0;ce<entries;++ce) {
296 tmp_vlc_bits[ce]=get_bits(gb, 5)+1;
297 }
298 }
299 } else {
300 uint_fast16_t current_entry=0;
301 uint_fast8_t current_length=get_bits(gb, 5)+1;
302
303 AV_DEBUG(" ordered, current length: %d \n", current_length); //FIXME
304
305 used_entries=entries;
306 for(;current_entry<used_entries;++current_length) {
307 uint_fast16_t i, number;
308
309 AV_DEBUG(" number bits: %d ", ilog(entries - current_entry));
310
311 number=get_bits(gb, ilog(entries - current_entry));
312
313 AV_DEBUG(" number: %d \n", number);
314
315 for(i=current_entry;i<number+current_entry;++i) {
316 if (i<used_entries) tmp_vlc_bits[i]=current_length;
317 }
318
319 current_entry+=number;
320 }
321 if (current_entry>used_entries) {
322 av_log(vc->avccontext, AV_LOG_ERROR, " More codelengths than codes in codebook. \n");
323 goto error;
324 }
325 }
326
327 codebook_setup->lookup_type=get_bits(gb, 4);
328
329 AV_DEBUG(" lookup type: %d : %s \n", codebook_setup->lookup_type, codebook_setup->lookup_type ? "vq" : "no lookup" );
330
331// If the codebook is used for (inverse) VQ, calculate codevectors.
332
333 if (codebook_setup->lookup_type==1) {
334 uint_fast16_t i, j, k;
335 uint_fast16_t codebook_lookup_values=ff_vorbis_nth_root(entries, codebook_setup->dimensions);
336 uint_fast16_t codebook_multiplicands[codebook_lookup_values];
337
338 float codebook_minimum_value=vorbisfloat2float(get_bits_long(gb, 32));
339 float codebook_delta_value=vorbisfloat2float(get_bits_long(gb, 32));
340 uint_fast8_t codebook_value_bits=get_bits(gb, 4)+1;
341 uint_fast8_t codebook_sequence_p=get_bits1(gb);
342
343 AV_DEBUG(" We expect %d numbers for building the codevectors. \n", codebook_lookup_values);
344 AV_DEBUG(" delta %f minmum %f \n", codebook_delta_value, codebook_minimum_value);
345
346 for(i=0;i<codebook_lookup_values;++i) {
347 codebook_multiplicands[i]=get_bits(gb, codebook_value_bits);
348
349 AV_DEBUG(" multiplicands*delta+minmum : %e \n", (float)codebook_multiplicands[i]*codebook_delta_value+codebook_minimum_value);
350 AV_DEBUG(" multiplicand %d \n", codebook_multiplicands[i]);
351 }
352
353// Weed out unused vlcs and build codevector vector
90901860 354 codebook_setup->codevectors=used_entries ? av_mallocz(used_entries*codebook_setup->dimensions * sizeof(float)) : NULL;
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355 for(j=0, i=0;i<entries;++i) {
356 uint_fast8_t dim=codebook_setup->dimensions;
357
358 if (tmp_vlc_bits[i]) {
359 float last=0.0;
360 uint_fast32_t lookup_offset=i;
361
362#ifdef V_DEBUG
363 av_log(vc->avccontext, AV_LOG_INFO, "Lookup offset %d ,", i);
364#endif
365
366 for(k=0;k<dim;++k) {
367 uint_fast32_t multiplicand_offset = lookup_offset % codebook_lookup_values;
368 codebook_setup->codevectors[j*dim+k]=codebook_multiplicands[multiplicand_offset]*codebook_delta_value+codebook_minimum_value+last;
369 if (codebook_sequence_p) {
370 last=codebook_setup->codevectors[j*dim+k];
371 }
372 lookup_offset/=codebook_lookup_values;
373 }
374 tmp_vlc_bits[j]=tmp_vlc_bits[i];
375
376#ifdef V_DEBUG
377 av_log(vc->avccontext, AV_LOG_INFO, "real lookup offset %d, vector: ", j);
378 for(k=0;k<dim;++k) {
379 av_log(vc->avccontext, AV_LOG_INFO, " %f ", codebook_setup->codevectors[j*dim+k]);
380 }
381 av_log(vc->avccontext, AV_LOG_INFO, "\n");
382#endif
383
384 ++j;
385 }
386 }
387 if (j!=used_entries) {
388 av_log(vc->avccontext, AV_LOG_ERROR, "Bug in codevector vector building code. \n");
389 goto error;
390 }
391 entries=used_entries;
392 }
393 else if (codebook_setup->lookup_type>=2) {
394 av_log(vc->avccontext, AV_LOG_ERROR, "Codebook lookup type not supported. \n");
395 goto error;
396 }
397
398// Initialize VLC table
399 if (ff_vorbis_len2vlc(tmp_vlc_bits, tmp_vlc_codes, entries)) {
400 av_log(vc->avccontext, AV_LOG_ERROR, " Invalid code lengths while generating vlcs. \n");
401 goto error;
402 }
403 codebook_setup->maxdepth=0;
404 for(t=0;t<entries;++t)
405 if (tmp_vlc_bits[t]>=codebook_setup->maxdepth) codebook_setup->maxdepth=tmp_vlc_bits[t];
406
407 if(codebook_setup->maxdepth > 3*V_NB_BITS) codebook_setup->nb_bits=V_NB_BITS2;
408 else codebook_setup->nb_bits=V_NB_BITS;
409
410 codebook_setup->maxdepth=(codebook_setup->maxdepth+codebook_setup->nb_bits-1)/codebook_setup->nb_bits;
411
412 if (init_vlc(&codebook_setup->vlc, codebook_setup->nb_bits, entries, tmp_vlc_bits, sizeof(*tmp_vlc_bits), sizeof(*tmp_vlc_bits), tmp_vlc_codes, sizeof(*tmp_vlc_codes), sizeof(*tmp_vlc_codes), INIT_VLC_LE)) {
413 av_log(vc->avccontext, AV_LOG_ERROR, " Error generating vlc tables. \n");
414 goto error;
415 }
416 }
417
418 av_free(tmp_vlc_bits);
419 av_free(tmp_vlc_codes);
420 return 0;
421
422// Error:
423error:
424 av_free(tmp_vlc_bits);
425 av_free(tmp_vlc_codes);
426 return 1;
427}
428
429// Process time domain transforms part (unused in Vorbis I)
430
431static int vorbis_parse_setup_hdr_tdtransforms(vorbis_context *vc) {
432 GetBitContext *gb=&vc->gb;
433 uint_fast8_t i;
434 uint_fast8_t vorbis_time_count=get_bits(gb, 6)+1;
435
436 for(i=0;i<vorbis_time_count;++i) {
437 uint_fast16_t vorbis_tdtransform=get_bits(gb, 16);
438
439 AV_DEBUG(" Vorbis time domain transform %d: %d \n", vorbis_time_count, vorbis_tdtransform);
440
441 if (vorbis_tdtransform) {
442 av_log(vc->avccontext, AV_LOG_ERROR, "Vorbis time domain transform data nonzero. \n");
443 return 1;
444 }
445 }
446 return 0;
447}
448
449// Process floors part
450
451static uint_fast8_t vorbis_floor0_decode(vorbis_context *vc,
452 vorbis_floor_data *vfu, float *vec);
453static void create_map( vorbis_context * vc, uint_fast8_t floor_number );
454static uint_fast8_t vorbis_floor1_decode(vorbis_context *vc,
455 vorbis_floor_data *vfu, float *vec);
456static int vorbis_parse_setup_hdr_floors(vorbis_context *vc) {
457 GetBitContext *gb=&vc->gb;
458 uint_fast16_t i,j,k;
459
460 vc->floor_count=get_bits(gb, 6)+1;
461
90901860 462 vc->floors=av_mallocz(vc->floor_count * sizeof(vorbis_floor));
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463
464 for (i=0;i<vc->floor_count;++i) {
465 vorbis_floor *floor_setup=&vc->floors[i];
466
467 floor_setup->floor_type=get_bits(gb, 16);
468
469 AV_DEBUG(" %d. floor type %d \n", i, floor_setup->floor_type);
470
471 if (floor_setup->floor_type==1) {
472 uint_fast8_t maximum_class=0;
473 uint_fast8_t rangebits;
474 uint_fast16_t floor1_values=2;
475
476 floor_setup->decode=vorbis_floor1_decode;
477
478 floor_setup->data.t1.partitions=get_bits(gb, 5);
479
480 AV_DEBUG(" %d.floor: %d partitions \n", i, floor_setup->data.t1.partitions);
481
482 for(j=0;j<floor_setup->data.t1.partitions;++j) {
483 floor_setup->data.t1.partition_class[j]=get_bits(gb, 4);
484 if (floor_setup->data.t1.partition_class[j]>maximum_class) maximum_class=floor_setup->data.t1.partition_class[j];
485
486 AV_DEBUG(" %d. floor %d partition class %d \n", i, j, floor_setup->data.t1.partition_class[j]);
487
488 }
489
490 AV_DEBUG(" maximum class %d \n", maximum_class);
491
492 floor_setup->data.t1.maximum_class=maximum_class;
493
494 for(j=0;j<=maximum_class;++j) {
495 floor_setup->data.t1.class_dimensions[j]=get_bits(gb, 3)+1;
496 floor_setup->data.t1.class_subclasses[j]=get_bits(gb, 2);
497
498 AV_DEBUG(" %d floor %d class dim: %d subclasses %d \n", i, j, floor_setup->data.t1.class_dimensions[j], floor_setup->data.t1.class_subclasses[j]);
499
500 if (floor_setup->data.t1.class_subclasses[j]) {
501 floor_setup->data.t1.class_masterbook[j]=get_bits(gb, 8);
502
503 AV_DEBUG(" masterbook: %d \n", floor_setup->data.t1.class_masterbook[j]);
504 }
505
506 for(k=0;k<(1<<floor_setup->data.t1.class_subclasses[j]);++k) {
507 floor_setup->data.t1.subclass_books[j][k]=(int16_t)get_bits(gb, 8)-1;
508
509 AV_DEBUG(" book %d. : %d \n", k, floor_setup->data.t1.subclass_books[j][k]);
510 }
511 }
512
513 floor_setup->data.t1.multiplier=get_bits(gb, 2)+1;
514 floor_setup->data.t1.x_list_dim=2;
515
516 for(j=0;j<floor_setup->data.t1.partitions;++j) {
517 floor_setup->data.t1.x_list_dim+=floor_setup->data.t1.class_dimensions[floor_setup->data.t1.partition_class[j]];
518 }
519
90901860 520 floor_setup->data.t1.list=av_mallocz(floor_setup->data.t1.x_list_dim * sizeof(floor1_entry_t));
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521
522
523 rangebits=get_bits(gb, 4);
524 floor_setup->data.t1.list[0].x = 0;
525 floor_setup->data.t1.list[1].x = (1<<rangebits);
526
527 for(j=0;j<floor_setup->data.t1.partitions;++j) {
528 for(k=0;k<floor_setup->data.t1.class_dimensions[floor_setup->data.t1.partition_class[j]];++k,++floor1_values) {
529 floor_setup->data.t1.list[floor1_values].x=get_bits(gb, rangebits);
530
531 AV_DEBUG(" %d. floor1 Y coord. %d \n", floor1_values, floor_setup->data.t1.list[floor1_values].x);
532 }
533 }
534
535// Precalculate order of x coordinates - needed for decode
536 ff_vorbis_ready_floor1_list(floor_setup->data.t1.list, floor_setup->data.t1.x_list_dim);
537 }
538 else if(floor_setup->floor_type==0) {
539 uint_fast8_t max_codebook_dim=0;
540
541 floor_setup->decode=vorbis_floor0_decode;
542
543 floor_setup->data.t0.order=get_bits(gb, 8);
544 floor_setup->data.t0.rate=get_bits(gb, 16);
545 floor_setup->data.t0.bark_map_size=get_bits(gb, 16);
546 floor_setup->data.t0.amplitude_bits=get_bits(gb, 6);
547 /* zero would result in a div by zero later *
548 * 2^0 - 1 == 0 */
549 if (floor_setup->data.t0.amplitude_bits == 0) {
550 av_log(vc->avccontext, AV_LOG_ERROR,
551 "Floor 0 amplitude bits is 0.\n");
552 return 1;
553 }
554 floor_setup->data.t0.amplitude_offset=get_bits(gb, 8);
555 floor_setup->data.t0.num_books=get_bits(gb, 4)+1;
556
557 /* allocate mem for booklist */
558 floor_setup->data.t0.book_list=
559 av_malloc(floor_setup->data.t0.num_books);
560 if(!floor_setup->data.t0.book_list) { return 1; }
561 /* read book indexes */
562 {
563 int idx;
564 uint_fast8_t book_idx;
565 for (idx=0;idx<floor_setup->data.t0.num_books;++idx) {
566 book_idx=get_bits(gb, 8);
567 floor_setup->data.t0.book_list[idx]=book_idx;
568 if (vc->codebooks[book_idx].dimensions > max_codebook_dim)
569 max_codebook_dim=vc->codebooks[book_idx].dimensions;
570
571 if (floor_setup->data.t0.book_list[idx]>vc->codebook_count)
572 return 1;
573 }
574 }
575
576 create_map( vc, i );
577
578 /* allocate mem for lsp coefficients */
579 {
580 /* codebook dim is for padding if codebook dim doesn't *
581 * divide order+1 then we need to read more data */
582 floor_setup->data.t0.lsp=
583 av_malloc((floor_setup->data.t0.order+1 + max_codebook_dim)
584 * sizeof(float));
585 if(!floor_setup->data.t0.lsp) { return 1; }
586 }
587
588#ifdef V_DEBUG /* debug output parsed headers */
589 AV_DEBUG("floor0 order: %u\n", floor_setup->data.t0.order);
590 AV_DEBUG("floor0 rate: %u\n", floor_setup->data.t0.rate);
591 AV_DEBUG("floor0 bark map size: %u\n",
592 floor_setup->data.t0.bark_map_size);
593 AV_DEBUG("floor0 amplitude bits: %u\n",
594 floor_setup->data.t0.amplitude_bits);
595 AV_DEBUG("floor0 amplitude offset: %u\n",
596 floor_setup->data.t0.amplitude_offset);
597 AV_DEBUG("floor0 number of books: %u\n",
598 floor_setup->data.t0.num_books);
599 AV_DEBUG("floor0 book list pointer: %p\n",
600 floor_setup->data.t0.book_list);
601 {
602 int idx;
603 for (idx=0;idx<floor_setup->data.t0.num_books;++idx) {
604 AV_DEBUG( " Book %d: %u\n",
605 idx+1,
606 floor_setup->data.t0.book_list[idx] );
607 }
608 }
609#endif
610 }
611 else {
612 av_log(vc->avccontext, AV_LOG_ERROR, "Invalid floor type!\n");
613 return 1;
614 }
615 }
616 return 0;
617}
618
619// Process residues part
620
621static int vorbis_parse_setup_hdr_residues(vorbis_context *vc){
622 GetBitContext *gb=&vc->gb;
623 uint_fast8_t i, j, k;
624
625 vc->residue_count=get_bits(gb, 6)+1;
90901860 626 vc->residues=av_mallocz(vc->residue_count * sizeof(vorbis_residue));
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627
628 AV_DEBUG(" There are %d residues. \n", vc->residue_count);
629
630 for(i=0;i<vc->residue_count;++i) {
631 vorbis_residue *res_setup=&vc->residues[i];
632 uint_fast8_t cascade[64];
633 uint_fast8_t high_bits;
634 uint_fast8_t low_bits;
635
636 res_setup->type=get_bits(gb, 16);
637
638 AV_DEBUG(" %d. residue type %d \n", i, res_setup->type);
639
640 res_setup->begin=get_bits(gb, 24);
641 res_setup->end=get_bits(gb, 24);
642 res_setup->partition_size=get_bits(gb, 24)+1;
643 res_setup->classifications=get_bits(gb, 6)+1;
644 res_setup->classbook=get_bits(gb, 8);
645
646 AV_DEBUG(" begin %d end %d part.size %d classif.s %d classbook %d \n", res_setup->begin, res_setup->end, res_setup->partition_size,
647 res_setup->classifications, res_setup->classbook);
648
649 for(j=0;j<res_setup->classifications;++j) {
650 high_bits=0;
651 low_bits=get_bits(gb, 3);
652 if (get_bits1(gb)) {
653 high_bits=get_bits(gb, 5);
654 }
655 cascade[j]=(high_bits<<3)+low_bits;
656
657 AV_DEBUG(" %d class casscade depth: %d \n", j, ilog(cascade[j]));
658 }
659
660 res_setup->maxpass=0;
661 for(j=0;j<res_setup->classifications;++j) {
662 for(k=0;k<8;++k) {
663 if (cascade[j]&(1<<k)) {
664 res_setup->books[j][k]=get_bits(gb, 8);
665
666 AV_DEBUG(" %d class casscade depth %d book: %d \n", j, k, res_setup->books[j][k]);
667
668 if (k>res_setup->maxpass) {
669 res_setup->maxpass=k;
670 }
671 } else {
672 res_setup->books[j][k]=-1;
673 }
674 }
675 }
676 }
677 return 0;
678}
679
680// Process mappings part
681
682static int vorbis_parse_setup_hdr_mappings(vorbis_context *vc) {
683 GetBitContext *gb=&vc->gb;
684 uint_fast8_t i, j;
685
686 vc->mapping_count=get_bits(gb, 6)+1;
90901860 687 vc->mappings=av_mallocz(vc->mapping_count * sizeof(vorbis_mapping));
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688
689 AV_DEBUG(" There are %d mappings. \n", vc->mapping_count);
690
691 for(i=0;i<vc->mapping_count;++i) {
692 vorbis_mapping *mapping_setup=&vc->mappings[i];
693
694 if (get_bits(gb, 16)) {
695 av_log(vc->avccontext, AV_LOG_ERROR, "Other mappings than type 0 are not compliant with the Vorbis I specification. \n");
696 return 1;
697 }
698 if (get_bits1(gb)) {
699 mapping_setup->submaps=get_bits(gb, 4)+1;
700 } else {
701 mapping_setup->submaps=1;
702 }
703
704 if (get_bits1(gb)) {
705 mapping_setup->coupling_steps=get_bits(gb, 8)+1;
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706 mapping_setup->magnitude=av_mallocz(mapping_setup->coupling_steps * sizeof(uint_fast8_t));
707 mapping_setup->angle =av_mallocz(mapping_setup->coupling_steps * sizeof(uint_fast8_t));
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708 for(j=0;j<mapping_setup->coupling_steps;++j) {
709 mapping_setup->magnitude[j]=get_bits(gb, ilog(vc->audio_channels-1));
710 mapping_setup->angle[j]=get_bits(gb, ilog(vc->audio_channels-1));
711 // FIXME: sanity checks
712 }
713 } else {
714 mapping_setup->coupling_steps=0;
715 }
716
717 AV_DEBUG(" %d mapping coupling steps: %d \n", i, mapping_setup->coupling_steps);
718
719 if(get_bits(gb, 2)) {
720 av_log(vc->avccontext, AV_LOG_ERROR, "%d. mapping setup data invalid. \n", i);
721 return 1; // following spec.
722 }
723
724 if (mapping_setup->submaps>1) {
90901860 725 mapping_setup->mux=av_mallocz(vc->audio_channels * sizeof(uint_fast8_t));
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726 for(j=0;j<vc->audio_channels;++j) {
727 mapping_setup->mux[j]=get_bits(gb, 4);
728 }
729 }
730
731 for(j=0;j<mapping_setup->submaps;++j) {
7ae7300e 732 skip_bits(gb, 8); // FIXME check?
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733 mapping_setup->submap_floor[j]=get_bits(gb, 8);
734 mapping_setup->submap_residue[j]=get_bits(gb, 8);
735
736 AV_DEBUG(" %d mapping %d submap : floor %d, residue %d \n", i, j, mapping_setup->submap_floor[j], mapping_setup->submap_residue[j]);
737 }
738 }
739 return 0;
740}
741
742// Process modes part
743
744static void create_map( vorbis_context * vc, uint_fast8_t floor_number )
745{
746 vorbis_floor * floors=vc->floors;
747 vorbis_floor0 * vf;
748 int idx;
749 int_fast8_t blockflag;
750 int_fast32_t * map;
751 int_fast32_t n; //TODO: could theoretically be smaller?
752
753 for (blockflag=0;blockflag<2;++blockflag)
754 {
755 n=vc->blocksize[blockflag]/2;
756 floors[floor_number].data.t0.map[blockflag]=
757 av_malloc((n+1) * sizeof(int_fast32_t)); // n+sentinel
758
759 map=floors[floor_number].data.t0.map[blockflag];
760 vf=&floors[floor_number].data.t0;
761
762 for (idx=0; idx<n;++idx) {
763 map[idx]=floor( BARK((vf->rate*idx)/(2.0f*n)) *
764 ((vf->bark_map_size)/
765 BARK(vf->rate/2.0f )) );
766 if (vf->bark_map_size-1 < map[idx]) {
767 map[idx]=vf->bark_map_size-1;
768 }
769 }
770 map[n]=-1;
771 vf->map_size[blockflag]=n;
772 }
773
774# ifdef V_DEBUG
775 for(idx=0;idx<=n;++idx) {
776 AV_DEBUG("floor0 map: map at pos %d is %d\n",
777 idx, map[idx]);
778 }
779# endif
780}
781
782static int vorbis_parse_setup_hdr_modes(vorbis_context *vc) {
783 GetBitContext *gb=&vc->gb;
784 uint_fast8_t i;
785
786 vc->mode_count=get_bits(gb, 6)+1;
90901860 787 vc->modes=av_mallocz(vc->mode_count * sizeof(vorbis_mode));
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788
789 AV_DEBUG(" There are %d modes.\n", vc->mode_count);
790
791 for(i=0;i<vc->mode_count;++i) {
792 vorbis_mode *mode_setup=&vc->modes[i];
793
5fc32c27 794 mode_setup->blockflag=get_bits1(gb);
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795 mode_setup->windowtype=get_bits(gb, 16); //FIXME check
796 mode_setup->transformtype=get_bits(gb, 16); //FIXME check
797 mode_setup->mapping=get_bits(gb, 8); //FIXME check
798
799 AV_DEBUG(" %d mode: blockflag %d, windowtype %d, transformtype %d, mapping %d \n", i, mode_setup->blockflag, mode_setup->windowtype, mode_setup->transformtype, mode_setup->mapping);
800 }
801 return 0;
802}
803
804// Process the whole setup header using the functions above
805
806static int vorbis_parse_setup_hdr(vorbis_context *vc) {
807 GetBitContext *gb=&vc->gb;
808
809 if ((get_bits(gb, 8)!='v') || (get_bits(gb, 8)!='o') ||
810 (get_bits(gb, 8)!='r') || (get_bits(gb, 8)!='b') ||
811 (get_bits(gb, 8)!='i') || (get_bits(gb, 8)!='s')) {
812 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (no vorbis signature). \n");
813 return 1;
814 }
815
816 if (vorbis_parse_setup_hdr_codebooks(vc)) {
817 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (codebooks). \n");
818 return 2;
819 }
820 if (vorbis_parse_setup_hdr_tdtransforms(vc)) {
821 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (time domain transforms). \n");
822 return 3;
823 }
824 if (vorbis_parse_setup_hdr_floors(vc)) {
825 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (floors). \n");
826 return 4;
827 }
828 if (vorbis_parse_setup_hdr_residues(vc)) {
829 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (residues). \n");
830 return 5;
831 }
832 if (vorbis_parse_setup_hdr_mappings(vc)) {
833 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (mappings). \n");
834 return 6;
835 }
836 if (vorbis_parse_setup_hdr_modes(vc)) {
837 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (modes). \n");
838 return 7;
839 }
840 if (!get_bits1(gb)) {
841 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (framing flag). \n");
842 return 8; // framing flag bit unset error
843 }
844
845 return 0;
846}
847
848// Process the identification header
849
850static int vorbis_parse_id_hdr(vorbis_context *vc){
851 GetBitContext *gb=&vc->gb;
852 uint_fast8_t bl0, bl1;
853
854 if ((get_bits(gb, 8)!='v') || (get_bits(gb, 8)!='o') ||
855 (get_bits(gb, 8)!='r') || (get_bits(gb, 8)!='b') ||
856 (get_bits(gb, 8)!='i') || (get_bits(gb, 8)!='s')) {
857 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis id header packet corrupt (no vorbis signature). \n");
858 return 1;
859 }
860
861 vc->version=get_bits_long(gb, 32); //FIXME check 0
862 vc->audio_channels=get_bits(gb, 8); //FIXME check >0
863 vc->audio_samplerate=get_bits_long(gb, 32); //FIXME check >0
864 vc->bitrate_maximum=get_bits_long(gb, 32);
865 vc->bitrate_nominal=get_bits_long(gb, 32);
866 vc->bitrate_minimum=get_bits_long(gb, 32);
867 bl0=get_bits(gb, 4);
868 bl1=get_bits(gb, 4);
869 vc->blocksize[0]=(1<<bl0);
870 vc->blocksize[1]=(1<<bl1);
871 if (bl0>13 || bl0<6 || bl1>13 || bl1<6 || bl1<bl0) {
872 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis id header packet corrupt (illegal blocksize). \n");
873 return 3;
874 }
875 // output format int16
876 if (vc->blocksize[1]/2 * vc->audio_channels * 2 >
877 AVCODEC_MAX_AUDIO_FRAME_SIZE) {
878 av_log(vc->avccontext, AV_LOG_ERROR, "Vorbis channel count makes "
879 "output packets too large.\n");
880 return 4;
881 }
882 vc->win[0]=ff_vorbis_vwin[bl0-6];
883 vc->win[1]=ff_vorbis_vwin[bl1-6];
884
885 if(vc->exp_bias){
886 int i, j;
887 for(j=0; j<2; j++){
888 float *win = av_malloc(vc->blocksize[j]/2 * sizeof(float));
889 for(i=0; i<vc->blocksize[j]/2; i++)
890 win[i] = vc->win[j][i] * (1<<15);
891 vc->win[j] = win;
892 }
893 }
894
895 if ((get_bits1(gb)) == 0) {
896 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis id header packet corrupt (framing flag not set). \n");
897 return 2;
898 }
899
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900 vc->channel_residues= av_malloc((vc->blocksize[1]/2)*vc->audio_channels * sizeof(float));
901 vc->channel_floors = av_malloc((vc->blocksize[1]/2)*vc->audio_channels * sizeof(float));
1234585f 902 vc->saved = av_mallocz((vc->blocksize[1]/2)*vc->audio_channels * sizeof(float));
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903 vc->ret = av_malloc((vc->blocksize[1]/2)*vc->audio_channels * sizeof(float));
904 vc->buf = av_malloc( vc->blocksize[1] * sizeof(float));
905 vc->buf_tmp = av_malloc( vc->blocksize[1] * sizeof(float));
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906 vc->saved_start=0;
907
908 ff_mdct_init(&vc->mdct[0], bl0, 1);
909 ff_mdct_init(&vc->mdct[1], bl1, 1);
910
911 AV_DEBUG(" vorbis version %d \n audio_channels %d \n audio_samplerate %d \n bitrate_max %d \n bitrate_nom %d \n bitrate_min %d \n blk_0 %d blk_1 %d \n ",
912 vc->version, vc->audio_channels, vc->audio_samplerate, vc->bitrate_maximum, vc->bitrate_nominal, vc->bitrate_minimum, vc->blocksize[0], vc->blocksize[1]);
913
914/*
915 BLK=vc->blocksize[0];
916 for(i=0;i<BLK/2;++i) {
917 vc->win[0][i]=sin(0.5*3.14159265358*(sin(((float)i+0.5)/(float)BLK*3.14159265358))*(sin(((float)i+0.5)/(float)BLK*3.14159265358)));
918 }
919*/
920
921 return 0;
922}
923
924// Process the extradata using the functions above (identification header, setup header)
925
98a6fff9 926static av_cold int vorbis_decode_init(AVCodecContext *avccontext) {
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927 vorbis_context *vc = avccontext->priv_data ;
928 uint8_t *headers = avccontext->extradata;
929 int headers_len=avccontext->extradata_size;
930 uint8_t *header_start[3];
931 int header_len[3];
932 GetBitContext *gb = &(vc->gb);
933 int hdr_type;
934
935 vc->avccontext = avccontext;
936 dsputil_init(&vc->dsp, avccontext);
937
938 if(vc->dsp.float_to_int16 == ff_float_to_int16_c) {
939 vc->add_bias = 385;
940 vc->exp_bias = 0;
941 } else {
942 vc->add_bias = 0;
943 vc->exp_bias = 15<<23;
944 }
945
946 if (!headers_len) {
947 av_log(avccontext, AV_LOG_ERROR, "Extradata corrupt.\n");
948 return -1;
949 }
950
951 if (ff_split_xiph_headers(headers, headers_len, 30, header_start, header_len) < 0) {
952 av_log(avccontext, AV_LOG_ERROR, "Extradata corrupt.\n");
953 return -1;
954 }
955
956 init_get_bits(gb, header_start[0], header_len[0]*8);
957 hdr_type=get_bits(gb, 8);
958 if (hdr_type!=1) {
959 av_log(avccontext, AV_LOG_ERROR, "First header is not the id header.\n");
960 return -1;
961 }
962 if (vorbis_parse_id_hdr(vc)) {
963 av_log(avccontext, AV_LOG_ERROR, "Id header corrupt.\n");
964 vorbis_free(vc);
965 return -1;
966 }
967
968 init_get_bits(gb, header_start[2], header_len[2]*8);
969 hdr_type=get_bits(gb, 8);
970 if (hdr_type!=5) {
971 av_log(avccontext, AV_LOG_ERROR, "Third header is not the setup header.\n");
972 return -1;
973 }
974 if (vorbis_parse_setup_hdr(vc)) {
975 av_log(avccontext, AV_LOG_ERROR, "Setup header corrupt.\n");
976 vorbis_free(vc);
977 return -1;
978 }
979
980 avccontext->channels = vc->audio_channels;
981 avccontext->sample_rate = vc->audio_samplerate;
da95f225 982 avccontext->frame_size = FFMIN(vc->blocksize[0], vc->blocksize[1])>>2;
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983
984 return 0 ;
985}
986
987// Decode audiopackets -------------------------------------------------
988
989// Read and decode floor
990
991static uint_fast8_t vorbis_floor0_decode(vorbis_context *vc,
992 vorbis_floor_data *vfu, float *vec) {
993 vorbis_floor0 * vf=&vfu->t0;
994 float * lsp=vf->lsp;
995 uint_fast32_t amplitude;
996 uint_fast32_t book_idx;
997 uint_fast8_t blockflag=vc->modes[vc->mode_number].blockflag;
998
999 amplitude=get_bits(&vc->gb, vf->amplitude_bits);
1000 if (amplitude>0) {
1001 float last = 0;
1002 uint_fast16_t lsp_len = 0;
1003 uint_fast16_t idx;
1004 vorbis_codebook codebook;
1005
1006 book_idx=get_bits(&vc->gb, ilog(vf->num_books));
1007 if ( book_idx >= vf->num_books ) {
1008 av_log( vc->avccontext, AV_LOG_ERROR,
1009 "floor0 dec: booknumber too high!\n" );
e14356c8 1010 book_idx= 0;
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1011 //FIXME: look above
1012 }
1013 AV_DEBUG( "floor0 dec: booknumber: %u\n", book_idx );
1014 codebook=vc->codebooks[vf->book_list[book_idx]];
1015
1016 while (lsp_len<vf->order) {
1017 int vec_off;
1018
1019 AV_DEBUG( "floor0 dec: book dimension: %d\n", codebook.dimensions );
1020 AV_DEBUG( "floor0 dec: maximum depth: %d\n", codebook.maxdepth );
1021 /* read temp vector */
1022 vec_off=get_vlc2(&vc->gb,
1023 codebook.vlc.table,
1024 codebook.nb_bits,
1025 codebook.maxdepth ) *
1026 codebook.dimensions;
1027 AV_DEBUG( "floor0 dec: vector offset: %d\n", vec_off );
1028 /* copy each vector component and add last to it */
1029 for (idx=0; idx<codebook.dimensions; ++idx) {
1030 lsp[lsp_len+idx]=codebook.codevectors[vec_off+idx]+last;
1031 }
1032 last=lsp[lsp_len+idx-1]; /* set last to last vector component */
1033
1034 lsp_len += codebook.dimensions;
1035 }
1036#ifdef V_DEBUG
1037 /* DEBUG: output lsp coeffs */
1038 {
1039 int idx;
1040 for ( idx = 0; idx < lsp_len; ++idx )
1041 AV_DEBUG("floor0 dec: coeff at %d is %f\n", idx, lsp[idx] );
1042 }
1043#endif
1044
1045 /* synthesize floor output vector */
1046 {
1047 int i;
1048 int order=vf->order;
1049 float wstep=M_PI/vf->bark_map_size;
1050
1051 for(i=0;i<order;i++) { lsp[i]=2.0f*cos(lsp[i]); }
1052
1053 AV_DEBUG("floor0 synth: map_size=%d; m=%d; wstep=%f\n",
1054 vf->map_size, order, wstep);
1055
1056 i=0;
1057 while(i<vf->map_size[blockflag]) {
1058 int j, iter_cond=vf->map[blockflag][i];
1059 float p=0.5f;
1060 float q=0.5f;
1061 float two_cos_w=2.0f*cos(wstep*iter_cond); // needed all times
1062
1063 /* similar part for the q and p products */
1064 for(j=0;j<order;j+=2) {
1065 q *= lsp[j] -two_cos_w;
1066 p *= lsp[j+1]-two_cos_w;
1067 }
1068 if(j==order) { // even order
1069 p *= p*(2.0f-two_cos_w);
1070 q *= q*(2.0f+two_cos_w);
1071 }
1072 else { // odd order
1073 q *= two_cos_w-lsp[j]; // one more time for q
1074
1075 /* final step and square */
1076 p *= p*(4.f-two_cos_w*two_cos_w);
1077 q *= q;
1078 }
1079
1080 /* calculate linear floor value */
1081 {
1082 q=exp( (
1083 ( (amplitude*vf->amplitude_offset)/
1084 (((1<<vf->amplitude_bits)-1) * sqrt(p+q)) )
1085 - vf->amplitude_offset ) * .11512925f
1086 );
1087 }
1088
1089 /* fill vector */
1090 do { vec[i]=q; ++i; }while(vf->map[blockflag][i]==iter_cond);
1091 }
1092 }
1093 }
1094 else {
1095 /* this channel is unused */
1096 return 1;
1097 }
1098
1099 AV_DEBUG(" Floor0 decoded\n");
1100
1101 return 0;
1102}
1103
1104static uint_fast8_t vorbis_floor1_decode(vorbis_context *vc, vorbis_floor_data *vfu, float *vec) {
1105 vorbis_floor1 * vf=&vfu->t1;
1106 GetBitContext *gb=&vc->gb;
1107 uint_fast16_t range_v[4]={ 256, 128, 86, 64 };
1108 uint_fast16_t range=range_v[vf->multiplier-1];
1109 uint_fast16_t floor1_Y[vf->x_list_dim];
1110 uint_fast16_t floor1_Y_final[vf->x_list_dim];
1111 int floor1_flag[vf->x_list_dim];
1112 uint_fast8_t class_;
1113 uint_fast8_t cdim;
1114 uint_fast8_t cbits;
1115 uint_fast8_t csub;
1116 uint_fast8_t cval;
1117 int_fast16_t book;
1118 uint_fast16_t offset;
1119 uint_fast16_t i,j;
1120 /*u*/int_fast16_t adx, ady, off, predicted; // WTF ? dy/adx= (unsigned)dy/adx ?
1121 int_fast16_t dy, err;
1122
1123
1124 if (!get_bits1(gb)) return 1; // silence
1125
1126// Read values (or differences) for the floor's points
1127
1128 floor1_Y[0]=get_bits(gb, ilog(range-1));
1129 floor1_Y[1]=get_bits(gb, ilog(range-1));
1130
1131 AV_DEBUG("floor 0 Y %d floor 1 Y %d \n", floor1_Y[0], floor1_Y[1]);
1132
1133 offset=2;
1134 for(i=0;i<vf->partitions;++i) {
1135 class_=vf->partition_class[i];
1136 cdim=vf->class_dimensions[class_];
1137 cbits=vf->class_subclasses[class_];
1138 csub=(1<<cbits)-1;
1139 cval=0;
1140
1141 AV_DEBUG("Cbits %d \n", cbits);
1142
1143 if (cbits) { // this reads all subclasses for this partition's class
1144 cval=get_vlc2(gb, vc->codebooks[vf->class_masterbook[class_]].vlc.table,
1145 vc->codebooks[vf->class_masterbook[class_]].nb_bits, 3);
1146 }
1147
1148 for(j=0;j<cdim;++j) {
1149 book=vf->subclass_books[class_][cval & csub];
1150
1151 AV_DEBUG("book %d Cbits %d cval %d bits:%d \n", book, cbits, cval, get_bits_count(gb));
1152
1153 cval=cval>>cbits;
1154 if (book>-1) {
1155 floor1_Y[offset+j]=get_vlc2(gb, vc->codebooks[book].vlc.table,
1156 vc->codebooks[book].nb_bits, 3);
1157 } else {
1158 floor1_Y[offset+j]=0;
1159 }
1160
1161 AV_DEBUG(" floor(%d) = %d \n", vf->list[offset+j].x, floor1_Y[offset+j]);
1162 }
1163 offset+=cdim;
1164 }
1165
1166// Amplitude calculation from the differences
1167
1168 floor1_flag[0]=1;
1169 floor1_flag[1]=1;
1170 floor1_Y_final[0]=floor1_Y[0];
1171 floor1_Y_final[1]=floor1_Y[1];
1172
1173 for(i=2;i<vf->x_list_dim;++i) {
1174 uint_fast16_t val, highroom, lowroom, room;
1175 uint_fast16_t high_neigh_offs;
1176 uint_fast16_t low_neigh_offs;
1177
1178 low_neigh_offs=vf->list[i].low;
1179 high_neigh_offs=vf->list[i].high;
1180 dy=floor1_Y_final[high_neigh_offs]-floor1_Y_final[low_neigh_offs]; // render_point begin
1181 adx=vf->list[high_neigh_offs].x-vf->list[low_neigh_offs].x;
1182 ady= FFABS(dy);
1183 err=ady*(vf->list[i].x-vf->list[low_neigh_offs].x);
1184 off=(int16_t)err/(int16_t)adx;
1185 if (dy<0) {
1186 predicted=floor1_Y_final[low_neigh_offs]-off;
1187 } else {
1188 predicted=floor1_Y_final[low_neigh_offs]+off;
1189 } // render_point end
1190
1191 val=floor1_Y[i];
1192 highroom=range-predicted;
1193 lowroom=predicted;
1194 if (highroom < lowroom) {
1195 room=highroom*2;
1196 } else {
1197 room=lowroom*2; // SPEC mispelling
1198 }
1199 if (val) {
1200 floor1_flag[low_neigh_offs]=1;
1201 floor1_flag[high_neigh_offs]=1;
1202 floor1_flag[i]=1;
1203 if (val>=room) {
1204 if (highroom > lowroom) {
1205 floor1_Y_final[i]=val-lowroom+predicted;
1206 } else {
1207 floor1_Y_final[i]=predicted-val+highroom-1;
1208 }
1209 } else {
1210 if (val & 1) {
1211 floor1_Y_final[i]=predicted-(val+1)/2;
1212 } else {
1213 floor1_Y_final[i]=predicted+val/2;
1214 }
1215 }
1216 } else {
1217 floor1_flag[i]=0;
1218 floor1_Y_final[i]=predicted;
1219 }
1220
1221 AV_DEBUG(" Decoded floor(%d) = %d / val %d \n", vf->list[i].x, floor1_Y_final[i], val);
1222 }
1223
1224// Curve synth - connect the calculated dots and convert from dB scale FIXME optimize ?
1225
1226 ff_vorbis_floor1_render_list(vf->list, vf->x_list_dim, floor1_Y_final, floor1_flag, vf->multiplier, vec, vf->list[1].x);
1227
1228 AV_DEBUG(" Floor decoded\n");
1229
1230 return 0;
1231}
1232
1233// Read and decode residue
1234
1235static int vorbis_residue_decode(vorbis_context *vc, vorbis_residue *vr, uint_fast8_t ch, uint_fast8_t *do_not_decode, float *vec, uint_fast16_t vlen) {
1236 GetBitContext *gb=&vc->gb;
1237 uint_fast8_t c_p_c=vc->codebooks[vr->classbook].dimensions;
1238 uint_fast16_t n_to_read=vr->end-vr->begin;
1239 uint_fast16_t ptns_to_read=n_to_read/vr->partition_size;
1240 uint_fast8_t classifs[ptns_to_read*vc->audio_channels];
1241 uint_fast8_t pass;
1242 uint_fast8_t ch_used;
1243 uint_fast8_t i,j,l;
1244 uint_fast16_t k;
1245
1246 if (vr->type==2) {
1247 for(j=1;j<ch;++j) {
1248 do_not_decode[0]&=do_not_decode[j]; // FIXME - clobbering input
1249 }
1250 if (do_not_decode[0]) return 0;
1251 ch_used=1;
1252 } else {
1253 ch_used=ch;
1254 }
1255
1256 AV_DEBUG(" residue type 0/1/2 decode begin, ch: %d cpc %d \n", ch, c_p_c);
1257
1258 for(pass=0;pass<=vr->maxpass;++pass) { // FIXME OPTIMIZE?
1259 uint_fast16_t voffset;
1260 uint_fast16_t partition_count;
1261 uint_fast16_t j_times_ptns_to_read;
1262
1263 voffset=vr->begin;
1264 for(partition_count=0;partition_count<ptns_to_read;) { // SPEC error
1265 if (!pass) {
1266 uint_fast32_t inverse_class = ff_inverse[vr->classifications];
1267 for(j_times_ptns_to_read=0, j=0;j<ch_used;++j) {
1268 if (!do_not_decode[j]) {
1269 uint_fast32_t temp=get_vlc2(gb, vc->codebooks[vr->classbook].vlc.table,
1270 vc->codebooks[vr->classbook].nb_bits, 3);
1271
1272 AV_DEBUG("Classword: %d \n", temp);
1273
1274 assert(vr->classifications > 1 && temp<=65536); //needed for inverse[]
1275 for(i=0;i<c_p_c;++i) {
1276 uint_fast32_t temp2;
1277
1278 temp2=(((uint_fast64_t)temp) * inverse_class)>>32;
1279 if (partition_count+c_p_c-1-i < ptns_to_read) {
1280 classifs[j_times_ptns_to_read+partition_count+c_p_c-1-i]=temp-temp2*vr->classifications;
1281 }
1282 temp=temp2;
1283 }
1284 }
1285 j_times_ptns_to_read+=ptns_to_read;
1286 }
1287 }
1288 for(i=0;(i<c_p_c) && (partition_count<ptns_to_read);++i) {
1289 for(j_times_ptns_to_read=0, j=0;j<ch_used;++j) {
1290 uint_fast16_t voffs;
1291
1292 if (!do_not_decode[j]) {
1293 uint_fast8_t vqclass=classifs[j_times_ptns_to_read+partition_count];
1294 int_fast16_t vqbook=vr->books[vqclass][pass];
1295
975741e7 1296 if (vqbook>=0 && vc->codebooks[vqbook].codevectors) {
07c55d8e
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1297 uint_fast16_t coffs;
1298 unsigned dim= vc->codebooks[vqbook].dimensions; // not uint_fast8_t: 64bit is slower here on amd64
1299 uint_fast16_t step= dim==1 ? vr->partition_size
1300 : FASTDIV(vr->partition_size, dim);
1301 vorbis_codebook codebook= vc->codebooks[vqbook];
1302
1303 if (vr->type==0) {
1304
1305 voffs=voffset+j*vlen;
1306 for(k=0;k<step;++k) {
1307 coffs=get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * dim;
1308 for(l=0;l<dim;++l) {
1309 vec[voffs+k+l*step]+=codebook.codevectors[coffs+l]; // FPMATH
1310 }
1311 }
1312 }
1313 else if (vr->type==1) {
1314 voffs=voffset+j*vlen;
1315 for(k=0;k<step;++k) {
1316 coffs=get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * dim;
1317 for(l=0;l<dim;++l, ++voffs) {
1318 vec[voffs]+=codebook.codevectors[coffs+l]; // FPMATH
1319
1320 AV_DEBUG(" pass %d offs: %d curr: %f change: %f cv offs.: %d \n", pass, voffs, vec[voffs], codebook.codevectors[coffs+l], coffs);
1321 }
1322 }
1323 }
1324 else if (vr->type==2 && ch==2 && (voffset&1)==0 && (dim&1)==0) { // most frequent case optimized
1325 voffs=voffset>>1;
1326
1327 if(dim==2) {
1328 for(k=0;k<step;++k) {
1329 coffs=get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * 2;
1330 vec[voffs+k ]+=codebook.codevectors[coffs ]; // FPMATH
1331 vec[voffs+k+vlen]+=codebook.codevectors[coffs+1]; // FPMATH
1332 }
1333 } else
1334 for(k=0;k<step;++k) {
1335 coffs=get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * dim;
1336 for(l=0;l<dim;l+=2, voffs++) {
1337 vec[voffs ]+=codebook.codevectors[coffs+l ]; // FPMATH
1338 vec[voffs+vlen]+=codebook.codevectors[coffs+l+1]; // FPMATH
1339
1340 AV_DEBUG(" pass %d offs: %d curr: %f change: %f cv offs.: %d+%d \n", pass, voffset/ch+(voffs%ch)*vlen, vec[voffset/ch+(voffs%ch)*vlen], codebook.codevectors[coffs+l], coffs, l);
1341 }
1342 }
1343
1344 }
1345 else if (vr->type==2) {
1346 voffs=voffset;
1347
1348 for(k=0;k<step;++k) {
1349 coffs=get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * dim;
1350 for(l=0;l<dim;++l, ++voffs) {
1351 vec[voffs/ch+(voffs%ch)*vlen]+=codebook.codevectors[coffs+l]; // FPMATH FIXME use if and counter instead of / and %
1352
1353 AV_DEBUG(" pass %d offs: %d curr: %f change: %f cv offs.: %d+%d \n", pass, voffset/ch+(voffs%ch)*vlen, vec[voffset/ch+(voffs%ch)*vlen], codebook.codevectors[coffs+l], coffs, l);
1354 }
1355 }
1356 } else {
1357 av_log(vc->avccontext, AV_LOG_ERROR, " Invalid residue type while residue decode?! \n");
1358 return 1;
1359 }
1360 }
1361 }
1362 j_times_ptns_to_read+=ptns_to_read;
1363 }
1364 ++partition_count;
1365 voffset+=vr->partition_size;
1366 }
1367 }
1368 }
1369 return 0;
1370}
1371
1372void vorbis_inverse_coupling(float *mag, float *ang, int blocksize)
1373{
1374 int i;
1375 for(i=0; i<blocksize; i++)
1376 {
1377 if (mag[i]>0.0) {
1378 if (ang[i]>0.0) {
1379 ang[i]=mag[i]-ang[i];
1380 } else {
1381 float temp=ang[i];
1382 ang[i]=mag[i];
1383 mag[i]+=temp;
1384 }
1385 } else {
1386 if (ang[i]>0.0) {
1387 ang[i]+=mag[i];
1388 } else {
1389 float temp=ang[i];
1390 ang[i]=mag[i];
1391 mag[i]-=temp;
1392 }
1393 }
1394 }
1395}
1396
1397// Decode the audio packet using the functions above
1398
1399static int vorbis_parse_audio_packet(vorbis_context *vc) {
1400 GetBitContext *gb=&vc->gb;
1401
1402 uint_fast8_t previous_window=0,next_window=0;
1403 uint_fast8_t mode_number;
1404 uint_fast16_t blocksize;
1405 int_fast32_t i,j;
1406 uint_fast8_t no_residue[vc->audio_channels];
1407 uint_fast8_t do_not_decode[vc->audio_channels];
1408 vorbis_mapping *mapping;
1409 float *ch_res_ptr=vc->channel_residues;
1410 float *ch_floor_ptr=vc->channel_floors;
1411 uint_fast8_t res_chan[vc->audio_channels];
1412 uint_fast8_t res_num=0;
1413 int_fast16_t retlen=0;
1414 uint_fast16_t saved_start=0;
1415 float fadd_bias = vc->add_bias;
1416
1417 if (get_bits1(gb)) {
1418 av_log(vc->avccontext, AV_LOG_ERROR, "Not a Vorbis I audio packet.\n");
1419 return -1; // packet type not audio
1420 }
1421
1422 if (vc->mode_count==1) {
1423 mode_number=0;
1424 } else {
1425 mode_number=get_bits(gb, ilog(vc->mode_count-1));
1426 }
1427 vc->mode_number=mode_number;
1428 mapping=&vc->mappings[vc->modes[mode_number].mapping];
1429
1430 AV_DEBUG(" Mode number: %d , mapping: %d , blocktype %d \n", mode_number, vc->modes[mode_number].mapping, vc->modes[mode_number].blockflag);
1431
1432 if (vc->modes[mode_number].blockflag) {
1433 previous_window=get_bits1(gb);
1434 next_window=get_bits1(gb);
1435 }
1436
1437 blocksize=vc->blocksize[vc->modes[mode_number].blockflag];
1438 memset(ch_res_ptr, 0, sizeof(float)*vc->audio_channels*blocksize/2); //FIXME can this be removed ?
1439 memset(ch_floor_ptr, 0, sizeof(float)*vc->audio_channels*blocksize/2); //FIXME can this be removed ?
1440
1441// Decode floor
1442
1443 for(i=0;i<vc->audio_channels;++i) {
1444 vorbis_floor *floor;
1445 if (mapping->submaps>1) {
1446 floor=&vc->floors[mapping->submap_floor[mapping->mux[i]]];
1447 } else {
1448 floor=&vc->floors[mapping->submap_floor[0]];
1449 }
1450
1451 no_residue[i]=floor->decode(vc, &floor->data, ch_floor_ptr);
1452 ch_floor_ptr+=blocksize/2;
1453 }
1454
1455// Nonzero vector propagate
1456
1457 for(i=mapping->coupling_steps-1;i>=0;--i) {
1458 if (!(no_residue[mapping->magnitude[i]] & no_residue[mapping->angle[i]])) {
1459 no_residue[mapping->magnitude[i]]=0;
1460 no_residue[mapping->angle[i]]=0;
1461 }
1462 }
1463
1464// Decode residue
1465
1466 for(i=0;i<mapping->submaps;++i) {
1467 vorbis_residue *residue;
1468 uint_fast8_t ch=0;
1469
1470 for(j=0;j<vc->audio_channels;++j) {
1471 if ((mapping->submaps==1) || (i=mapping->mux[j])) {
1472 res_chan[j]=res_num;
1473 if (no_residue[j]) {
1474 do_not_decode[ch]=1;
1475 } else {
1476 do_not_decode[ch]=0;
1477 }
1478 ++ch;
1479 ++res_num;
1480 }
1481 }
1482 residue=&vc->residues[mapping->submap_residue[i]];
1483 vorbis_residue_decode(vc, residue, ch, do_not_decode, ch_res_ptr, blocksize/2);
1484
1485 ch_res_ptr+=ch*blocksize/2;
1486 }
1487
1488// Inverse coupling
1489
1490 for(i=mapping->coupling_steps-1;i>=0;--i) { //warning: i has to be signed
1491 float *mag, *ang;
1492
1493 mag=vc->channel_residues+res_chan[mapping->magnitude[i]]*blocksize/2;
1494 ang=vc->channel_residues+res_chan[mapping->angle[i]]*blocksize/2;
1495 vc->dsp.vorbis_inverse_coupling(mag, ang, blocksize/2);
1496 }
1497
1498// Dotproduct
1499
1500 for(j=0, ch_floor_ptr=vc->channel_floors;j<vc->audio_channels;++j,ch_floor_ptr+=blocksize/2) {
1501 ch_res_ptr=vc->channel_residues+res_chan[j]*blocksize/2;
1502 vc->dsp.vector_fmul(ch_floor_ptr, ch_res_ptr, blocksize/2);
1503 }
1504
1505// MDCT, overlap/add, save data for next overlapping FPMATH
1506
1507 for(j=0;j<vc->audio_channels;++j) {
1508 uint_fast8_t step=vc->audio_channels;
1509 uint_fast16_t k;
1510 float *saved=vc->saved+j*vc->blocksize[1]/2;
1511 float *ret=vc->ret;
1512 const float *lwin=vc->win[1];
1513 const float *swin=vc->win[0];
1514 float *buf=vc->buf;
1515 float *buf_tmp=vc->buf_tmp;
1516
1517 ch_floor_ptr=vc->channel_floors+j*blocksize/2;
1518
1519 saved_start=vc->saved_start;
1520
1521 vc->mdct[0].fft.imdct_calc(&vc->mdct[vc->modes[mode_number].blockflag], buf, ch_floor_ptr, buf_tmp);
1522
1523 //FIXME process channels together, to allow faster simd vector_fmul_add_add?
1524 if (vc->modes[mode_number].blockflag) {
1525 // -- overlap/add
1526 if (previous_window) {
1527 vc->dsp.vector_fmul_add_add(ret+j, buf, lwin, saved, vc->add_bias, vc->blocksize[1]/2, step);
1528 retlen=vc->blocksize[1]/2;
1529 } else {
1530 int len = (vc->blocksize[1]-vc->blocksize[0])/4;
1531 buf += len;
1532 vc->dsp.vector_fmul_add_add(ret+j, buf, swin, saved, vc->add_bias, vc->blocksize[0]/2, step);
1533 k = vc->blocksize[0]/2*step + j;
1534 buf += vc->blocksize[0]/2;
1535 if(vc->exp_bias){
1536 for(i=0; i<len; i++, k+=step)
1537 ((uint32_t*)ret)[k] = ((uint32_t*)buf)[i] + vc->exp_bias; // ret[k]=buf[i]*(1<<bias)
1538 } else {
1539 for(i=0; i<len; i++, k+=step)
1540 ret[k] = buf[i] + fadd_bias;
1541 }
1542 buf=vc->buf;
1543 retlen=vc->blocksize[0]/2+len;
1544 }
1545 // -- save
1546 if (next_window) {
1547 buf += vc->blocksize[1]/2;
1548 vc->dsp.vector_fmul_reverse(saved, buf, lwin, vc->blocksize[1]/2);
1549 saved_start=0;
1550 } else {
1551 saved_start=(vc->blocksize[1]-vc->blocksize[0])/4;
1552 buf += vc->blocksize[1]/2;
1553 for(i=0; i<saved_start; i++)
1554 ((uint32_t*)saved)[i] = ((uint32_t*)buf)[i] + vc->exp_bias;
1555 vc->dsp.vector_fmul_reverse(saved+saved_start, buf+saved_start, swin, vc->blocksize[0]/2);
1556 }
1557 } else {
1558 // --overlap/add
1559 if(vc->add_bias) {
1560 for(k=j, i=0;i<saved_start;++i, k+=step)
1561 ret[k] = saved[i] + fadd_bias;
1562 } else {
1563 for(k=j, i=0;i<saved_start;++i, k+=step)
1564 ret[k] = saved[i];
1565 }
1566 vc->dsp.vector_fmul_add_add(ret+k, buf, swin, saved+saved_start, vc->add_bias, vc->blocksize[0]/2, step);
1567 retlen=saved_start+vc->blocksize[0]/2;
1568 // -- save
1569 buf += vc->blocksize[0]/2;
1570 vc->dsp.vector_fmul_reverse(saved, buf, swin, vc->blocksize[0]/2);
1571 saved_start=0;
1572 }
1573 }
1574 vc->saved_start=saved_start;
1575
1576 return retlen*vc->audio_channels;
1577}
1578
1579// Return the decoded audio packet through the standard api
1580
1581static int vorbis_decode_frame(AVCodecContext *avccontext,
1582 void *data, int *data_size,
8c4bd28b 1583 const uint8_t *buf, int buf_size)
07c55d8e
AJ
1584{
1585 vorbis_context *vc = avccontext->priv_data ;
1586 GetBitContext *gb = &(vc->gb);
1587
1588 int_fast16_t len;
1589
1590 if(!buf_size){
1591 return 0;
1592 }
1593
1594 AV_DEBUG("packet length %d \n", buf_size);
1595
1596 init_get_bits(gb, buf, buf_size*8);
1597
1598 len=vorbis_parse_audio_packet(vc);
1599
1600 if (len<=0) {
1601 *data_size=0;
1602 return buf_size;
1603 }
1604
1605 if (!vc->first_frame) {
1606 vc->first_frame=1;
1607 *data_size=0;
1608 return buf_size ;
1609 }
1610
1611 AV_DEBUG("parsed %d bytes %d bits, returned %d samples (*ch*bits) \n", get_bits_count(gb)/8, get_bits_count(gb)%8, len);
1612
1613 vc->dsp.float_to_int16(data, vc->ret, len);
1614 *data_size=len*2;
1615
1616 return buf_size ;
1617}
1618
1619// Close decoder
1620
98a6fff9 1621static av_cold int vorbis_decode_close(AVCodecContext *avccontext) {
07c55d8e
AJ
1622 vorbis_context *vc = avccontext->priv_data;
1623
1624 vorbis_free(vc);
1625
1626 return 0 ;
1627}
1628
1629AVCodec vorbis_decoder = {
1630 "vorbis",
1631 CODEC_TYPE_AUDIO,
1632 CODEC_ID_VORBIS,
1633 sizeof(vorbis_context),
1634 vorbis_decode_init,
1635 NULL,
1636 vorbis_decode_close,
1637 vorbis_decode_frame,
fe4bf374 1638 .long_name = NULL_IF_CONFIG_SMALL("Vorbis"),
07c55d8e
AJ
1639};
1640