Simplify r20025: use align_get_bits instead of reimplementing it.
[libav.git] / libavcodec / vorbis_dec.c
CommitLineData
07c55d8e 1/**
bad5537e 2 * @file libavcodec/vorbis_dec.c
07c55d8e
AJ
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
07c55d8e
AJ
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"
9106a698 31#include "get_bits.h"
07c55d8e
AJ
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)
36b7e983 40#define V_MAX_PARTITIONS (1<<20)
07c55d8e
AJ
41
42#ifndef V_DEBUG
43#define AV_DEBUG(...)
44#endif
45
46#undef NDEBUG
47#include <assert.h>
48
49typedef struct {
50 uint_fast8_t dimensions;
51 uint_fast8_t lookup_type;
52 uint_fast8_t maxdepth;
53 VLC vlc;
54 float *codevectors;
55 unsigned int nb_bits;
56} vorbis_codebook;
57
58typedef union vorbis_floor_u vorbis_floor_data;
59typedef struct vorbis_floor0_s vorbis_floor0;
60typedef struct vorbis_floor1_s vorbis_floor1;
61struct vorbis_context_s;
62typedef
63uint_fast8_t (* vorbis_floor_decode_func)
64 (struct vorbis_context_s *, vorbis_floor_data *, float *);
65typedef struct {
66 uint_fast8_t floor_type;
67 vorbis_floor_decode_func decode;
5e56b30e
DB
68 union vorbis_floor_u {
69 struct vorbis_floor0_s {
07c55d8e
AJ
70 uint_fast8_t order;
71 uint_fast16_t rate;
72 uint_fast16_t bark_map_size;
73 int_fast32_t * map[2];
74 uint_fast32_t map_size[2];
75 uint_fast8_t amplitude_bits;
76 uint_fast8_t amplitude_offset;
77 uint_fast8_t num_books;
78 uint_fast8_t * book_list;
79 float * lsp;
80 } t0;
5e56b30e 81 struct vorbis_floor1_s {
07c55d8e
AJ
82 uint_fast8_t partitions;
83 uint_fast8_t maximum_class;
84 uint_fast8_t partition_class[32];
85 uint_fast8_t class_dimensions[16];
86 uint_fast8_t class_subclasses[16];
87 uint_fast8_t class_masterbook[16];
88 int_fast16_t subclass_books[16][8];
89 uint_fast8_t multiplier;
90 uint_fast16_t x_list_dim;
05dee1b7 91 vorbis_floor1_entry * list;
07c55d8e
AJ
92 } t1;
93 } data;
94} vorbis_floor;
95
96typedef struct {
97 uint_fast16_t type;
98 uint_fast32_t begin;
99 uint_fast32_t end;
100 uint_fast32_t partition_size;
101 uint_fast8_t classifications;
102 uint_fast8_t classbook;
103 int_fast16_t books[64][8];
104 uint_fast8_t maxpass;
105} vorbis_residue;
106
107typedef struct {
108 uint_fast8_t submaps;
109 uint_fast16_t coupling_steps;
110 uint_fast8_t *magnitude;
111 uint_fast8_t *angle;
112 uint_fast8_t *mux;
113 uint_fast8_t submap_floor[16];
114 uint_fast8_t submap_residue[16];
115} vorbis_mapping;
116
117typedef struct {
118 uint_fast8_t blockflag;
119 uint_fast16_t windowtype;
120 uint_fast16_t transformtype;
121 uint_fast8_t mapping;
122} vorbis_mode;
123
124typedef struct vorbis_context_s {
125 AVCodecContext *avccontext;
126 GetBitContext gb;
127 DSPContext dsp;
128
01b22147 129 FFTContext mdct[2];
07c55d8e
AJ
130 uint_fast8_t first_frame;
131 uint_fast32_t version;
132 uint_fast8_t audio_channels;
133 uint_fast32_t audio_samplerate;
134 uint_fast32_t bitrate_maximum;
135 uint_fast32_t bitrate_nominal;
136 uint_fast32_t bitrate_minimum;
137 uint_fast32_t blocksize[2];
138 const float * win[2];
139 uint_fast16_t codebook_count;
140 vorbis_codebook *codebooks;
141 uint_fast8_t floor_count;
142 vorbis_floor *floors;
143 uint_fast8_t residue_count;
144 vorbis_residue *residues;
145 uint_fast8_t mapping_count;
146 vorbis_mapping *mappings;
147 uint_fast8_t mode_count;
148 vorbis_mode *modes;
149 uint_fast8_t mode_number; // mode number for the current packet
f27e1d64 150 uint_fast8_t previous_window;
07c55d8e
AJ
151 float *channel_residues;
152 float *channel_floors;
153 float *saved;
07c55d8e
AJ
154 uint_fast32_t add_bias; // for float->int conversion
155 uint_fast32_t exp_bias;
156} vorbis_context;
157
158/* Helper functions */
159
160#define BARK(x) \
161 (13.1f*atan(0.00074f*(x))+2.24f*atan(1.85e-8f*(x)*(x))+1e-4f*(x))
162
5e56b30e
DB
163static float vorbisfloat2float(uint_fast32_t val)
164{
07c55d8e
AJ
165 double mant=val&0x1fffff;
166 long exp=(val&0x7fe00000L)>>21;
5e56b30e
DB
167 if (val&0x80000000)
168 mant=-mant;
a5c0969a 169 return ldexp(mant, exp - 20 - 768);
07c55d8e
AJ
170}
171
172
173// Free all allocated memory -----------------------------------------
174
5e56b30e
DB
175static void vorbis_free(vorbis_context *vc)
176{
07c55d8e
AJ
177 int_fast16_t i;
178
179 av_freep(&vc->channel_residues);
180 av_freep(&vc->channel_floors);
181 av_freep(&vc->saved);
07c55d8e
AJ
182
183 av_freep(&vc->residues);
184 av_freep(&vc->modes);
185
186 ff_mdct_end(&vc->mdct[0]);
187 ff_mdct_end(&vc->mdct[1]);
188
189 for(i=0;i<vc->codebook_count;++i) {
190 av_free(vc->codebooks[i].codevectors);
191 free_vlc(&vc->codebooks[i].vlc);
192 }
193 av_freep(&vc->codebooks);
194
195 for(i=0;i<vc->floor_count;++i) {
196 if(vc->floors[i].floor_type==0) {
197 av_free(vc->floors[i].data.t0.map[0]);
198 av_free(vc->floors[i].data.t0.map[1]);
199 av_free(vc->floors[i].data.t0.book_list);
200 av_free(vc->floors[i].data.t0.lsp);
5e56b30e 201 } else {
07c55d8e
AJ
202 av_free(vc->floors[i].data.t1.list);
203 }
204 }
205 av_freep(&vc->floors);
206
207 for(i=0;i<vc->mapping_count;++i) {
208 av_free(vc->mappings[i].magnitude);
209 av_free(vc->mappings[i].angle);
210 av_free(vc->mappings[i].mux);
211 }
212 av_freep(&vc->mappings);
07c55d8e
AJ
213}
214
215// Parse setup header -------------------------------------------------
216
217// Process codebooks part
218
5e56b30e
DB
219static int vorbis_parse_setup_hdr_codebooks(vorbis_context *vc)
220{
07c55d8e
AJ
221 uint_fast16_t cb;
222 uint8_t *tmp_vlc_bits;
223 uint32_t *tmp_vlc_codes;
224 GetBitContext *gb=&vc->gb;
225
226 vc->codebook_count=get_bits(gb,8)+1;
227
228 AV_DEBUG(" Codebooks: %d \n", vc->codebook_count);
229
90901860
MN
230 vc->codebooks=av_mallocz(vc->codebook_count * sizeof(vorbis_codebook));
231 tmp_vlc_bits =av_mallocz(V_MAX_VLCS * sizeof(uint8_t));
232 tmp_vlc_codes=av_mallocz(V_MAX_VLCS * sizeof(uint32_t));
07c55d8e
AJ
233
234 for(cb=0;cb<vc->codebook_count;++cb) {
235 vorbis_codebook *codebook_setup=&vc->codebooks[cb];
236 uint_fast8_t ordered;
237 uint_fast32_t t, used_entries=0;
238 uint_fast32_t entries;
239
240 AV_DEBUG(" %d. Codebook \n", cb);
241
242 if (get_bits(gb, 24)!=0x564342) {
243 av_log(vc->avccontext, AV_LOG_ERROR, " %"PRIdFAST16". Codebook setup data corrupt. \n", cb);
244 goto error;
245 }
246
247 codebook_setup->dimensions=get_bits(gb, 16);
98f7bcb1
MN
248 if (codebook_setup->dimensions>16||codebook_setup->dimensions==0) {
249 av_log(vc->avccontext, AV_LOG_ERROR, " %"PRIdFAST16". Codebook's dimension is invalid (%d). \n", cb, codebook_setup->dimensions);
07c55d8e
AJ
250 goto error;
251 }
252 entries=get_bits(gb, 24);
253 if (entries>V_MAX_VLCS) {
254 av_log(vc->avccontext, AV_LOG_ERROR, " %"PRIdFAST16". Codebook has too many entries (%"PRIdFAST32"). \n", cb, entries);
255 goto error;
256 }
257
258 ordered=get_bits1(gb);
259
260 AV_DEBUG(" codebook_dimensions %d, codebook_entries %d \n", codebook_setup->dimensions, entries);
261
262 if (!ordered) {
263 uint_fast16_t ce;
264 uint_fast8_t flag;
265 uint_fast8_t sparse=get_bits1(gb);
266
267 AV_DEBUG(" not ordered \n");
268
269 if (sparse) {
270 AV_DEBUG(" sparse \n");
271
272 used_entries=0;
273 for(ce=0;ce<entries;++ce) {
274 flag=get_bits1(gb);
275 if (flag) {
276 tmp_vlc_bits[ce]=get_bits(gb, 5)+1;
277 ++used_entries;
5e56b30e
DB
278 } else
279 tmp_vlc_bits[ce]=0;
07c55d8e
AJ
280 }
281 } else {
282 AV_DEBUG(" not sparse \n");
283
284 used_entries=entries;
5e56b30e 285 for(ce=0;ce<entries;++ce)
07c55d8e 286 tmp_vlc_bits[ce]=get_bits(gb, 5)+1;
07c55d8e
AJ
287 }
288 } else {
289 uint_fast16_t current_entry=0;
290 uint_fast8_t current_length=get_bits(gb, 5)+1;
291
292 AV_DEBUG(" ordered, current length: %d \n", current_length); //FIXME
293
294 used_entries=entries;
1de4ba71 295 for(;current_entry<used_entries && current_length <= 32;++current_length) {
07c55d8e
AJ
296 uint_fast16_t i, number;
297
298 AV_DEBUG(" number bits: %d ", ilog(entries - current_entry));
299
300 number=get_bits(gb, ilog(entries - current_entry));
301
302 AV_DEBUG(" number: %d \n", number);
303
5e56b30e
DB
304 for(i=current_entry;i<number+current_entry;++i)
305 if (i<used_entries)
306 tmp_vlc_bits[i]=current_length;
07c55d8e
AJ
307
308 current_entry+=number;
309 }
310 if (current_entry>used_entries) {
311 av_log(vc->avccontext, AV_LOG_ERROR, " More codelengths than codes in codebook. \n");
312 goto error;
313 }
314 }
315
316 codebook_setup->lookup_type=get_bits(gb, 4);
317
318 AV_DEBUG(" lookup type: %d : %s \n", codebook_setup->lookup_type, codebook_setup->lookup_type ? "vq" : "no lookup" );
319
320// If the codebook is used for (inverse) VQ, calculate codevectors.
321
322 if (codebook_setup->lookup_type==1) {
323 uint_fast16_t i, j, k;
324 uint_fast16_t codebook_lookup_values=ff_vorbis_nth_root(entries, codebook_setup->dimensions);
325 uint_fast16_t codebook_multiplicands[codebook_lookup_values];
326
327 float codebook_minimum_value=vorbisfloat2float(get_bits_long(gb, 32));
328 float codebook_delta_value=vorbisfloat2float(get_bits_long(gb, 32));
329 uint_fast8_t codebook_value_bits=get_bits(gb, 4)+1;
330 uint_fast8_t codebook_sequence_p=get_bits1(gb);
331
332 AV_DEBUG(" We expect %d numbers for building the codevectors. \n", codebook_lookup_values);
333 AV_DEBUG(" delta %f minmum %f \n", codebook_delta_value, codebook_minimum_value);
334
335 for(i=0;i<codebook_lookup_values;++i) {
336 codebook_multiplicands[i]=get_bits(gb, codebook_value_bits);
337
338 AV_DEBUG(" multiplicands*delta+minmum : %e \n", (float)codebook_multiplicands[i]*codebook_delta_value+codebook_minimum_value);
339 AV_DEBUG(" multiplicand %d \n", codebook_multiplicands[i]);
340 }
341
342// Weed out unused vlcs and build codevector vector
90901860 343 codebook_setup->codevectors=used_entries ? av_mallocz(used_entries*codebook_setup->dimensions * sizeof(float)) : NULL;
07c55d8e
AJ
344 for(j=0, i=0;i<entries;++i) {
345 uint_fast8_t dim=codebook_setup->dimensions;
346
347 if (tmp_vlc_bits[i]) {
348 float last=0.0;
349 uint_fast32_t lookup_offset=i;
350
351#ifdef V_DEBUG
352 av_log(vc->avccontext, AV_LOG_INFO, "Lookup offset %d ,", i);
353#endif
354
355 for(k=0;k<dim;++k) {
356 uint_fast32_t multiplicand_offset = lookup_offset % codebook_lookup_values;
357 codebook_setup->codevectors[j*dim+k]=codebook_multiplicands[multiplicand_offset]*codebook_delta_value+codebook_minimum_value+last;
5e56b30e 358 if (codebook_sequence_p)
07c55d8e 359 last=codebook_setup->codevectors[j*dim+k];
07c55d8e
AJ
360 lookup_offset/=codebook_lookup_values;
361 }
362 tmp_vlc_bits[j]=tmp_vlc_bits[i];
363
364#ifdef V_DEBUG
365 av_log(vc->avccontext, AV_LOG_INFO, "real lookup offset %d, vector: ", j);
5e56b30e 366 for(k=0;k<dim;++k)
07c55d8e 367 av_log(vc->avccontext, AV_LOG_INFO, " %f ", codebook_setup->codevectors[j*dim+k]);
07c55d8e
AJ
368 av_log(vc->avccontext, AV_LOG_INFO, "\n");
369#endif
370
371 ++j;
372 }
373 }
374 if (j!=used_entries) {
375 av_log(vc->avccontext, AV_LOG_ERROR, "Bug in codevector vector building code. \n");
376 goto error;
377 }
378 entries=used_entries;
5e56b30e 379 } else if (codebook_setup->lookup_type>=2) {
07c55d8e
AJ
380 av_log(vc->avccontext, AV_LOG_ERROR, "Codebook lookup type not supported. \n");
381 goto error;
382 }
383
384// Initialize VLC table
385 if (ff_vorbis_len2vlc(tmp_vlc_bits, tmp_vlc_codes, entries)) {
386 av_log(vc->avccontext, AV_LOG_ERROR, " Invalid code lengths while generating vlcs. \n");
387 goto error;
388 }
389 codebook_setup->maxdepth=0;
390 for(t=0;t<entries;++t)
5e56b30e
DB
391 if (tmp_vlc_bits[t]>=codebook_setup->maxdepth)
392 codebook_setup->maxdepth=tmp_vlc_bits[t];
07c55d8e 393
5e56b30e
DB
394 if(codebook_setup->maxdepth > 3*V_NB_BITS)
395 codebook_setup->nb_bits=V_NB_BITS2;
396 else
397 codebook_setup->nb_bits=V_NB_BITS;
07c55d8e
AJ
398
399 codebook_setup->maxdepth=(codebook_setup->maxdepth+codebook_setup->nb_bits-1)/codebook_setup->nb_bits;
400
401 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)) {
402 av_log(vc->avccontext, AV_LOG_ERROR, " Error generating vlc tables. \n");
403 goto error;
404 }
405 }
406
407 av_free(tmp_vlc_bits);
408 av_free(tmp_vlc_codes);
409 return 0;
410
411// Error:
412error:
413 av_free(tmp_vlc_bits);
414 av_free(tmp_vlc_codes);
0a01efd0 415 return -1;
07c55d8e
AJ
416}
417
418// Process time domain transforms part (unused in Vorbis I)
419
5e56b30e
DB
420static int vorbis_parse_setup_hdr_tdtransforms(vorbis_context *vc)
421{
07c55d8e
AJ
422 GetBitContext *gb=&vc->gb;
423 uint_fast8_t i;
424 uint_fast8_t vorbis_time_count=get_bits(gb, 6)+1;
425
426 for(i=0;i<vorbis_time_count;++i) {
427 uint_fast16_t vorbis_tdtransform=get_bits(gb, 16);
428
429 AV_DEBUG(" Vorbis time domain transform %d: %d \n", vorbis_time_count, vorbis_tdtransform);
430
431 if (vorbis_tdtransform) {
432 av_log(vc->avccontext, AV_LOG_ERROR, "Vorbis time domain transform data nonzero. \n");
0a01efd0 433 return -1;
07c55d8e
AJ
434 }
435 }
436 return 0;
437}
438
439// Process floors part
440
441static uint_fast8_t vorbis_floor0_decode(vorbis_context *vc,
442 vorbis_floor_data *vfu, float *vec);
443static void create_map( vorbis_context * vc, uint_fast8_t floor_number );
444static uint_fast8_t vorbis_floor1_decode(vorbis_context *vc,
445 vorbis_floor_data *vfu, float *vec);
5e56b30e
DB
446static int vorbis_parse_setup_hdr_floors(vorbis_context *vc)
447{
07c55d8e
AJ
448 GetBitContext *gb=&vc->gb;
449 uint_fast16_t i,j,k;
450
451 vc->floor_count=get_bits(gb, 6)+1;
452
90901860 453 vc->floors=av_mallocz(vc->floor_count * sizeof(vorbis_floor));
07c55d8e
AJ
454
455 for (i=0;i<vc->floor_count;++i) {
456 vorbis_floor *floor_setup=&vc->floors[i];
457
458 floor_setup->floor_type=get_bits(gb, 16);
459
460 AV_DEBUG(" %d. floor type %d \n", i, floor_setup->floor_type);
461
462 if (floor_setup->floor_type==1) {
463 uint_fast8_t maximum_class=0;
464 uint_fast8_t rangebits;
465 uint_fast16_t floor1_values=2;
466
467 floor_setup->decode=vorbis_floor1_decode;
468
469 floor_setup->data.t1.partitions=get_bits(gb, 5);
470
471 AV_DEBUG(" %d.floor: %d partitions \n", i, floor_setup->data.t1.partitions);
472
473 for(j=0;j<floor_setup->data.t1.partitions;++j) {
474 floor_setup->data.t1.partition_class[j]=get_bits(gb, 4);
5e56b30e
DB
475 if (floor_setup->data.t1.partition_class[j]>maximum_class)
476 maximum_class=floor_setup->data.t1.partition_class[j];
07c55d8e
AJ
477
478 AV_DEBUG(" %d. floor %d partition class %d \n", i, j, floor_setup->data.t1.partition_class[j]);
479
480 }
481
482 AV_DEBUG(" maximum class %d \n", maximum_class);
483
484 floor_setup->data.t1.maximum_class=maximum_class;
485
486 for(j=0;j<=maximum_class;++j) {
487 floor_setup->data.t1.class_dimensions[j]=get_bits(gb, 3)+1;
488 floor_setup->data.t1.class_subclasses[j]=get_bits(gb, 2);
489
490 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]);
491
492 if (floor_setup->data.t1.class_subclasses[j]) {
993092dc
GC
493 int bits=get_bits(gb, 8);
494 if (bits>=vc->codebook_count) {
495 av_log(vc->avccontext, AV_LOG_ERROR, "Masterbook index %d is out of range.\n", bits);
0a01efd0 496 return -1;
993092dc
GC
497 }
498 floor_setup->data.t1.class_masterbook[j]=bits;
07c55d8e
AJ
499
500 AV_DEBUG(" masterbook: %d \n", floor_setup->data.t1.class_masterbook[j]);
501 }
502
503 for(k=0;k<(1<<floor_setup->data.t1.class_subclasses[j]);++k) {
993092dc
GC
504 int16_t bits=get_bits(gb, 8)-1;
505 if (bits!=-1 && bits>=vc->codebook_count) {
506 av_log(vc->avccontext, AV_LOG_ERROR, "Subclass book index %d is out of range.\n", bits);
0a01efd0 507 return -1;
993092dc
GC
508 }
509 floor_setup->data.t1.subclass_books[j][k]=bits;
07c55d8e
AJ
510
511 AV_DEBUG(" book %d. : %d \n", k, floor_setup->data.t1.subclass_books[j][k]);
512 }
513 }
514
515 floor_setup->data.t1.multiplier=get_bits(gb, 2)+1;
516 floor_setup->data.t1.x_list_dim=2;
517
5e56b30e 518 for(j=0;j<floor_setup->data.t1.partitions;++j)
07c55d8e 519 floor_setup->data.t1.x_list_dim+=floor_setup->data.t1.class_dimensions[floor_setup->data.t1.partition_class[j]];
07c55d8e 520
05dee1b7 521 floor_setup->data.t1.list=av_mallocz(floor_setup->data.t1.x_list_dim * sizeof(vorbis_floor1_entry));
07c55d8e
AJ
522
523
524 rangebits=get_bits(gb, 4);
525 floor_setup->data.t1.list[0].x = 0;
526 floor_setup->data.t1.list[1].x = (1<<rangebits);
527
528 for(j=0;j<floor_setup->data.t1.partitions;++j) {
529 for(k=0;k<floor_setup->data.t1.class_dimensions[floor_setup->data.t1.partition_class[j]];++k,++floor1_values) {
530 floor_setup->data.t1.list[floor1_values].x=get_bits(gb, rangebits);
531
532 AV_DEBUG(" %d. floor1 Y coord. %d \n", floor1_values, floor_setup->data.t1.list[floor1_values].x);
533 }
534 }
535
536// Precalculate order of x coordinates - needed for decode
537 ff_vorbis_ready_floor1_list(floor_setup->data.t1.list, floor_setup->data.t1.x_list_dim);
5e56b30e 538 } else if(floor_setup->floor_type==0) {
07c55d8e
AJ
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");
0a01efd0 552 return -1;
07c55d8e
AJ
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);
5e56b30e
DB
560 if(!floor_setup->data.t0.book_list)
561 return -1;
07c55d8e
AJ
562 /* read book indexes */
563 {
564 int idx;
565 uint_fast8_t book_idx;
566 for (idx=0;idx<floor_setup->data.t0.num_books;++idx) {
567 book_idx=get_bits(gb, 8);
96651e79 568 if (book_idx>=vc->codebook_count)
0a01efd0 569 return -1;
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AJ
570 floor_setup->data.t0.book_list[idx]=book_idx;
571 if (vc->codebooks[book_idx].dimensions > max_codebook_dim)
572 max_codebook_dim=vc->codebooks[book_idx].dimensions;
07c55d8e
AJ
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));
5e56b30e
DB
585 if(!floor_setup->data.t0.lsp)
586 return -1;
07c55d8e
AJ
587 }
588
589#ifdef V_DEBUG /* debug output parsed headers */
590 AV_DEBUG("floor0 order: %u\n", floor_setup->data.t0.order);
591 AV_DEBUG("floor0 rate: %u\n", floor_setup->data.t0.rate);
592 AV_DEBUG("floor0 bark map size: %u\n",
593 floor_setup->data.t0.bark_map_size);
594 AV_DEBUG("floor0 amplitude bits: %u\n",
595 floor_setup->data.t0.amplitude_bits);
596 AV_DEBUG("floor0 amplitude offset: %u\n",
597 floor_setup->data.t0.amplitude_offset);
598 AV_DEBUG("floor0 number of books: %u\n",
599 floor_setup->data.t0.num_books);
600 AV_DEBUG("floor0 book list pointer: %p\n",
601 floor_setup->data.t0.book_list);
602 {
603 int idx;
604 for (idx=0;idx<floor_setup->data.t0.num_books;++idx) {
605 AV_DEBUG( " Book %d: %u\n",
606 idx+1,
607 floor_setup->data.t0.book_list[idx] );
608 }
609 }
610#endif
5e56b30e 611 } else {
07c55d8e 612 av_log(vc->avccontext, AV_LOG_ERROR, "Invalid floor type!\n");
0a01efd0 613 return -1;
07c55d8e
AJ
614 }
615 }
616 return 0;
617}
618
619// Process residues part
620
5e56b30e
DB
621static int vorbis_parse_setup_hdr_residues(vorbis_context *vc)
622{
07c55d8e
AJ
623 GetBitContext *gb=&vc->gb;
624 uint_fast8_t i, j, k;
625
626 vc->residue_count=get_bits(gb, 6)+1;
90901860 627 vc->residues=av_mallocz(vc->residue_count * sizeof(vorbis_residue));
07c55d8e
AJ
628
629 AV_DEBUG(" There are %d residues. \n", vc->residue_count);
630
631 for(i=0;i<vc->residue_count;++i) {
632 vorbis_residue *res_setup=&vc->residues[i];
633 uint_fast8_t cascade[64];
634 uint_fast8_t high_bits;
635 uint_fast8_t low_bits;
636
637 res_setup->type=get_bits(gb, 16);
638
639 AV_DEBUG(" %d. residue type %d \n", i, res_setup->type);
640
641 res_setup->begin=get_bits(gb, 24);
642 res_setup->end=get_bits(gb, 24);
643 res_setup->partition_size=get_bits(gb, 24)+1;
36b7e983
GC
644 /* Validations to prevent a buffer overflow later. */
645 if (res_setup->begin>res_setup->end
646 || res_setup->end>vc->blocksize[1]/(res_setup->type==2?1:2)
647 || (res_setup->end-res_setup->begin)/res_setup->partition_size>V_MAX_PARTITIONS) {
c31afa5d 648 av_log(vc->avccontext, AV_LOG_ERROR, "partition out of bounds: type, begin, end, size, blocksize: %"PRIdFAST16", %"PRIdFAST32", %"PRIdFAST32", %"PRIdFAST32", %"PRIdFAST32"\n", res_setup->type, res_setup->begin, res_setup->end, res_setup->partition_size, vc->blocksize[1]/2);
0a01efd0 649 return -1;
36b7e983
GC
650 }
651
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AJ
652 res_setup->classifications=get_bits(gb, 6)+1;
653 res_setup->classbook=get_bits(gb, 8);
79a42581
GC
654 if (res_setup->classbook>=vc->codebook_count) {
655 av_log(vc->avccontext, AV_LOG_ERROR, "classbook value %d out of range. \n", res_setup->classbook);
0a01efd0 656 return -1;
79a42581 657 }
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658
659 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,
660 res_setup->classifications, res_setup->classbook);
661
662 for(j=0;j<res_setup->classifications;++j) {
663 high_bits=0;
664 low_bits=get_bits(gb, 3);
5e56b30e 665 if (get_bits1(gb))
07c55d8e 666 high_bits=get_bits(gb, 5);
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AJ
667 cascade[j]=(high_bits<<3)+low_bits;
668
669 AV_DEBUG(" %d class casscade depth: %d \n", j, ilog(cascade[j]));
670 }
671
672 res_setup->maxpass=0;
673 for(j=0;j<res_setup->classifications;++j) {
674 for(k=0;k<8;++k) {
675 if (cascade[j]&(1<<k)) {
cdf1512e
GC
676 int bits=get_bits(gb, 8);
677 if (bits>=vc->codebook_count) {
678 av_log(vc->avccontext, AV_LOG_ERROR, "book value %d out of range. \n", bits);
0a01efd0 679 return -1;
cdf1512e
GC
680 }
681 res_setup->books[j][k]=bits;
07c55d8e
AJ
682
683 AV_DEBUG(" %d class casscade depth %d book: %d \n", j, k, res_setup->books[j][k]);
684
5e56b30e 685 if (k>res_setup->maxpass)
07c55d8e 686 res_setup->maxpass=k;
07c55d8e
AJ
687 } else {
688 res_setup->books[j][k]=-1;
689 }
690 }
691 }
692 }
693 return 0;
694}
695
696// Process mappings part
697
5e56b30e
DB
698static int vorbis_parse_setup_hdr_mappings(vorbis_context *vc)
699{
07c55d8e
AJ
700 GetBitContext *gb=&vc->gb;
701 uint_fast8_t i, j;
702
703 vc->mapping_count=get_bits(gb, 6)+1;
90901860 704 vc->mappings=av_mallocz(vc->mapping_count * sizeof(vorbis_mapping));
07c55d8e
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705
706 AV_DEBUG(" There are %d mappings. \n", vc->mapping_count);
707
708 for(i=0;i<vc->mapping_count;++i) {
709 vorbis_mapping *mapping_setup=&vc->mappings[i];
710
711 if (get_bits(gb, 16)) {
712 av_log(vc->avccontext, AV_LOG_ERROR, "Other mappings than type 0 are not compliant with the Vorbis I specification. \n");
0a01efd0 713 return -1;
07c55d8e
AJ
714 }
715 if (get_bits1(gb)) {
716 mapping_setup->submaps=get_bits(gb, 4)+1;
717 } else {
718 mapping_setup->submaps=1;
719 }
720
721 if (get_bits1(gb)) {
722 mapping_setup->coupling_steps=get_bits(gb, 8)+1;
90901860
MN
723 mapping_setup->magnitude=av_mallocz(mapping_setup->coupling_steps * sizeof(uint_fast8_t));
724 mapping_setup->angle =av_mallocz(mapping_setup->coupling_steps * sizeof(uint_fast8_t));
07c55d8e
AJ
725 for(j=0;j<mapping_setup->coupling_steps;++j) {
726 mapping_setup->magnitude[j]=get_bits(gb, ilog(vc->audio_channels-1));
727 mapping_setup->angle[j]=get_bits(gb, ilog(vc->audio_channels-1));
d70fa8f1
GC
728 if (mapping_setup->magnitude[j]>=vc->audio_channels) {
729 av_log(vc->avccontext, AV_LOG_ERROR, "magnitude channel %d out of range. \n", mapping_setup->magnitude[j]);
0a01efd0 730 return -1;
d70fa8f1
GC
731 }
732 if (mapping_setup->angle[j]>=vc->audio_channels) {
733 av_log(vc->avccontext, AV_LOG_ERROR, "angle channel %d out of range. \n", mapping_setup->angle[j]);
0a01efd0 734 return -1;
d70fa8f1 735 }
07c55d8e
AJ
736 }
737 } else {
738 mapping_setup->coupling_steps=0;
739 }
740
741 AV_DEBUG(" %d mapping coupling steps: %d \n", i, mapping_setup->coupling_steps);
742
743 if(get_bits(gb, 2)) {
744 av_log(vc->avccontext, AV_LOG_ERROR, "%d. mapping setup data invalid. \n", i);
0a01efd0 745 return -1; // following spec.
07c55d8e
AJ
746 }
747
748 if (mapping_setup->submaps>1) {
90901860 749 mapping_setup->mux=av_mallocz(vc->audio_channels * sizeof(uint_fast8_t));
0b8e7ab0 750 for(j=0;j<vc->audio_channels;++j)
07c55d8e 751 mapping_setup->mux[j]=get_bits(gb, 4);
07c55d8e
AJ
752 }
753
754 for(j=0;j<mapping_setup->submaps;++j) {
aedc98b0 755 int bits;
7ae7300e 756 skip_bits(gb, 8); // FIXME check?
aedc98b0
GC
757 bits=get_bits(gb, 8);
758 if (bits>=vc->floor_count) {
759 av_log(vc->avccontext, AV_LOG_ERROR, "submap floor value %d out of range. \n", bits);
760 return -1;
761 }
762 mapping_setup->submap_floor[j]=bits;
763 bits=get_bits(gb, 8);
764 if (bits>=vc->residue_count) {
765 av_log(vc->avccontext, AV_LOG_ERROR, "submap residue value %d out of range. \n", bits);
766 return -1;
767 }
768 mapping_setup->submap_residue[j]=bits;
07c55d8e
AJ
769
770 AV_DEBUG(" %d mapping %d submap : floor %d, residue %d \n", i, j, mapping_setup->submap_floor[j], mapping_setup->submap_residue[j]);
771 }
772 }
773 return 0;
774}
775
776// Process modes part
777
778static void create_map( vorbis_context * vc, uint_fast8_t floor_number )
779{
780 vorbis_floor * floors=vc->floors;
781 vorbis_floor0 * vf;
782 int idx;
783 int_fast8_t blockflag;
784 int_fast32_t * map;
785 int_fast32_t n; //TODO: could theoretically be smaller?
786
5e56b30e 787 for (blockflag=0;blockflag<2;++blockflag) {
07c55d8e
AJ
788 n=vc->blocksize[blockflag]/2;
789 floors[floor_number].data.t0.map[blockflag]=
790 av_malloc((n+1) * sizeof(int_fast32_t)); // n+sentinel
791
792 map=floors[floor_number].data.t0.map[blockflag];
793 vf=&floors[floor_number].data.t0;
794
795 for (idx=0; idx<n;++idx) {
796 map[idx]=floor( BARK((vf->rate*idx)/(2.0f*n)) *
797 ((vf->bark_map_size)/
798 BARK(vf->rate/2.0f )) );
5e56b30e 799 if (vf->bark_map_size-1 < map[idx])
07c55d8e 800 map[idx]=vf->bark_map_size-1;
07c55d8e
AJ
801 }
802 map[n]=-1;
803 vf->map_size[blockflag]=n;
804 }
805
806# ifdef V_DEBUG
807 for(idx=0;idx<=n;++idx) {
808 AV_DEBUG("floor0 map: map at pos %d is %d\n",
809 idx, map[idx]);
810 }
811# endif
812}
813
5e56b30e
DB
814static int vorbis_parse_setup_hdr_modes(vorbis_context *vc)
815{
07c55d8e
AJ
816 GetBitContext *gb=&vc->gb;
817 uint_fast8_t i;
818
819 vc->mode_count=get_bits(gb, 6)+1;
90901860 820 vc->modes=av_mallocz(vc->mode_count * sizeof(vorbis_mode));
07c55d8e
AJ
821
822 AV_DEBUG(" There are %d modes.\n", vc->mode_count);
823
824 for(i=0;i<vc->mode_count;++i) {
825 vorbis_mode *mode_setup=&vc->modes[i];
826
5fc32c27 827 mode_setup->blockflag=get_bits1(gb);
07c55d8e
AJ
828 mode_setup->windowtype=get_bits(gb, 16); //FIXME check
829 mode_setup->transformtype=get_bits(gb, 16); //FIXME check
e5b0cfb5
GC
830 mode_setup->mapping=get_bits(gb, 8);
831 if (mode_setup->mapping>=vc->mapping_count) {
832 av_log(vc->avccontext, AV_LOG_ERROR, "mode mapping value %d out of range. \n", mode_setup->mapping);
0a01efd0 833 return -1;
e5b0cfb5 834 }
07c55d8e
AJ
835
836 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);
837 }
838 return 0;
839}
840
841// Process the whole setup header using the functions above
842
5e56b30e
DB
843static int vorbis_parse_setup_hdr(vorbis_context *vc)
844{
07c55d8e
AJ
845 GetBitContext *gb=&vc->gb;
846
847 if ((get_bits(gb, 8)!='v') || (get_bits(gb, 8)!='o') ||
848 (get_bits(gb, 8)!='r') || (get_bits(gb, 8)!='b') ||
849 (get_bits(gb, 8)!='i') || (get_bits(gb, 8)!='s')) {
850 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (no vorbis signature). \n");
0a01efd0 851 return -1;
07c55d8e
AJ
852 }
853
854 if (vorbis_parse_setup_hdr_codebooks(vc)) {
855 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (codebooks). \n");
0a01efd0 856 return -2;
07c55d8e
AJ
857 }
858 if (vorbis_parse_setup_hdr_tdtransforms(vc)) {
859 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (time domain transforms). \n");
0a01efd0 860 return -3;
07c55d8e
AJ
861 }
862 if (vorbis_parse_setup_hdr_floors(vc)) {
863 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (floors). \n");
0a01efd0 864 return -4;
07c55d8e
AJ
865 }
866 if (vorbis_parse_setup_hdr_residues(vc)) {
867 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (residues). \n");
0a01efd0 868 return -5;
07c55d8e
AJ
869 }
870 if (vorbis_parse_setup_hdr_mappings(vc)) {
871 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (mappings). \n");
0a01efd0 872 return -6;
07c55d8e
AJ
873 }
874 if (vorbis_parse_setup_hdr_modes(vc)) {
875 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (modes). \n");
0a01efd0 876 return -7;
07c55d8e
AJ
877 }
878 if (!get_bits1(gb)) {
879 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (framing flag). \n");
0a01efd0 880 return -8; // framing flag bit unset error
07c55d8e
AJ
881 }
882
883 return 0;
884}
885
886// Process the identification header
887
5e56b30e
DB
888static int vorbis_parse_id_hdr(vorbis_context *vc)
889{
07c55d8e
AJ
890 GetBitContext *gb=&vc->gb;
891 uint_fast8_t bl0, bl1;
892
893 if ((get_bits(gb, 8)!='v') || (get_bits(gb, 8)!='o') ||
894 (get_bits(gb, 8)!='r') || (get_bits(gb, 8)!='b') ||
895 (get_bits(gb, 8)!='i') || (get_bits(gb, 8)!='s')) {
896 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis id header packet corrupt (no vorbis signature). \n");
0a01efd0 897 return -1;
07c55d8e
AJ
898 }
899
900 vc->version=get_bits_long(gb, 32); //FIXME check 0
9062cd35
MN
901 vc->audio_channels=get_bits(gb, 8);
902 if(vc->audio_channels <= 0){
903 av_log(vc->avccontext, AV_LOG_ERROR, "Invalid number of channels\n");
904 return -1;
905 }
906 vc->audio_samplerate=get_bits_long(gb, 32);
907 if(vc->audio_samplerate <= 0){
908 av_log(vc->avccontext, AV_LOG_ERROR, "Invalid samplerate\n");
909 return -1;
910 }
07c55d8e
AJ
911 vc->bitrate_maximum=get_bits_long(gb, 32);
912 vc->bitrate_nominal=get_bits_long(gb, 32);
913 vc->bitrate_minimum=get_bits_long(gb, 32);
914 bl0=get_bits(gb, 4);
915 bl1=get_bits(gb, 4);
916 vc->blocksize[0]=(1<<bl0);
917 vc->blocksize[1]=(1<<bl1);
918 if (bl0>13 || bl0<6 || bl1>13 || bl1<6 || bl1<bl0) {
919 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis id header packet corrupt (illegal blocksize). \n");
0a01efd0 920 return -3;
07c55d8e
AJ
921 }
922 // output format int16
923 if (vc->blocksize[1]/2 * vc->audio_channels * 2 >
924 AVCODEC_MAX_AUDIO_FRAME_SIZE) {
925 av_log(vc->avccontext, AV_LOG_ERROR, "Vorbis channel count makes "
926 "output packets too large.\n");
0a01efd0 927 return -4;
07c55d8e
AJ
928 }
929 vc->win[0]=ff_vorbis_vwin[bl0-6];
930 vc->win[1]=ff_vorbis_vwin[bl1-6];
931
07c55d8e
AJ
932 if ((get_bits1(gb)) == 0) {
933 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis id header packet corrupt (framing flag not set). \n");
0a01efd0 934 return -2;
07c55d8e
AJ
935 }
936
90901860
MN
937 vc->channel_residues= av_malloc((vc->blocksize[1]/2)*vc->audio_channels * sizeof(float));
938 vc->channel_floors = av_malloc((vc->blocksize[1]/2)*vc->audio_channels * sizeof(float));
b9fa3208 939 vc->saved = av_mallocz((vc->blocksize[1]/4)*vc->audio_channels * sizeof(float));
f27e1d64 940 vc->previous_window=0;
07c55d8e 941
37317794
SS
942 ff_mdct_init(&vc->mdct[0], bl0, 1, vc->exp_bias ? -(1<<15) : -1.0);
943 ff_mdct_init(&vc->mdct[1], bl1, 1, vc->exp_bias ? -(1<<15) : -1.0);
07c55d8e
AJ
944
945 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 ",
946 vc->version, vc->audio_channels, vc->audio_samplerate, vc->bitrate_maximum, vc->bitrate_nominal, vc->bitrate_minimum, vc->blocksize[0], vc->blocksize[1]);
947
948/*
949 BLK=vc->blocksize[0];
950 for(i=0;i<BLK/2;++i) {
951 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)));
952 }
953*/
954
955 return 0;
956}
957
958// Process the extradata using the functions above (identification header, setup header)
959
5e56b30e
DB
960static av_cold int vorbis_decode_init(AVCodecContext *avccontext)
961{
07c55d8e
AJ
962 vorbis_context *vc = avccontext->priv_data ;
963 uint8_t *headers = avccontext->extradata;
964 int headers_len=avccontext->extradata_size;
965 uint8_t *header_start[3];
966 int header_len[3];
967 GetBitContext *gb = &(vc->gb);
968 int hdr_type;
969
970 vc->avccontext = avccontext;
971 dsputil_init(&vc->dsp, avccontext);
972
8a37920c 973 if(vc->dsp.float_to_int16_interleave == ff_float_to_int16_interleave_c) {
07c55d8e
AJ
974 vc->add_bias = 385;
975 vc->exp_bias = 0;
976 } else {
977 vc->add_bias = 0;
978 vc->exp_bias = 15<<23;
979 }
980
981 if (!headers_len) {
982 av_log(avccontext, AV_LOG_ERROR, "Extradata corrupt.\n");
983 return -1;
984 }
985
986 if (ff_split_xiph_headers(headers, headers_len, 30, header_start, header_len) < 0) {
987 av_log(avccontext, AV_LOG_ERROR, "Extradata corrupt.\n");
988 return -1;
989 }
990
991 init_get_bits(gb, header_start[0], header_len[0]*8);
992 hdr_type=get_bits(gb, 8);
993 if (hdr_type!=1) {
994 av_log(avccontext, AV_LOG_ERROR, "First header is not the id header.\n");
995 return -1;
996 }
997 if (vorbis_parse_id_hdr(vc)) {
998 av_log(avccontext, AV_LOG_ERROR, "Id header corrupt.\n");
999 vorbis_free(vc);
1000 return -1;
1001 }
1002
1003 init_get_bits(gb, header_start[2], header_len[2]*8);
1004 hdr_type=get_bits(gb, 8);
1005 if (hdr_type!=5) {
1006 av_log(avccontext, AV_LOG_ERROR, "Third header is not the setup header.\n");
c8562a6f 1007 vorbis_free(vc);
07c55d8e
AJ
1008 return -1;
1009 }
1010 if (vorbis_parse_setup_hdr(vc)) {
1011 av_log(avccontext, AV_LOG_ERROR, "Setup header corrupt.\n");
1012 vorbis_free(vc);
1013 return -1;
1014 }
1015
1016 avccontext->channels = vc->audio_channels;
1017 avccontext->sample_rate = vc->audio_samplerate;
da95f225 1018 avccontext->frame_size = FFMIN(vc->blocksize[0], vc->blocksize[1])>>2;
fd76c37f 1019 avccontext->sample_fmt = SAMPLE_FMT_S16;
07c55d8e
AJ
1020
1021 return 0 ;
1022}
1023
1024// Decode audiopackets -------------------------------------------------
1025
1026// Read and decode floor
1027
1028static uint_fast8_t vorbis_floor0_decode(vorbis_context *vc,
5e56b30e
DB
1029 vorbis_floor_data *vfu, float *vec)
1030{
07c55d8e
AJ
1031 vorbis_floor0 * vf=&vfu->t0;
1032 float * lsp=vf->lsp;
1033 uint_fast32_t amplitude;
1034 uint_fast32_t book_idx;
1035 uint_fast8_t blockflag=vc->modes[vc->mode_number].blockflag;
1036
1037 amplitude=get_bits(&vc->gb, vf->amplitude_bits);
1038 if (amplitude>0) {
1039 float last = 0;
1040 uint_fast16_t lsp_len = 0;
1041 uint_fast16_t idx;
1042 vorbis_codebook codebook;
1043
1044 book_idx=get_bits(&vc->gb, ilog(vf->num_books));
1045 if ( book_idx >= vf->num_books ) {
1046 av_log( vc->avccontext, AV_LOG_ERROR,
1047 "floor0 dec: booknumber too high!\n" );
e14356c8 1048 book_idx= 0;
07c55d8e
AJ
1049 //FIXME: look above
1050 }
1051 AV_DEBUG( "floor0 dec: booknumber: %u\n", book_idx );
1052 codebook=vc->codebooks[vf->book_list[book_idx]];
1053
1054 while (lsp_len<vf->order) {
1055 int vec_off;
1056
1057 AV_DEBUG( "floor0 dec: book dimension: %d\n", codebook.dimensions );
1058 AV_DEBUG( "floor0 dec: maximum depth: %d\n", codebook.maxdepth );
1059 /* read temp vector */
1060 vec_off=get_vlc2(&vc->gb,
1061 codebook.vlc.table,
1062 codebook.nb_bits,
1063 codebook.maxdepth ) *
1064 codebook.dimensions;
1065 AV_DEBUG( "floor0 dec: vector offset: %d\n", vec_off );
1066 /* copy each vector component and add last to it */
5e56b30e 1067 for (idx=0; idx<codebook.dimensions; ++idx)
07c55d8e 1068 lsp[lsp_len+idx]=codebook.codevectors[vec_off+idx]+last;
07c55d8e
AJ
1069 last=lsp[lsp_len+idx-1]; /* set last to last vector component */
1070
1071 lsp_len += codebook.dimensions;
1072 }
1073#ifdef V_DEBUG
1074 /* DEBUG: output lsp coeffs */
1075 {
1076 int idx;
1077 for ( idx = 0; idx < lsp_len; ++idx )
1078 AV_DEBUG("floor0 dec: coeff at %d is %f\n", idx, lsp[idx] );
1079 }
1080#endif
1081
1082 /* synthesize floor output vector */
1083 {
1084 int i;
1085 int order=vf->order;
1086 float wstep=M_PI/vf->bark_map_size;
1087
5e56b30e
DB
1088 for(i=0;i<order;i++)
1089 lsp[i]=2.0f*cos(lsp[i]);
07c55d8e
AJ
1090
1091 AV_DEBUG("floor0 synth: map_size=%d; m=%d; wstep=%f\n",
1092 vf->map_size, order, wstep);
1093
1094 i=0;
1095 while(i<vf->map_size[blockflag]) {
1096 int j, iter_cond=vf->map[blockflag][i];
1097 float p=0.5f;
1098 float q=0.5f;
1099 float two_cos_w=2.0f*cos(wstep*iter_cond); // needed all times
1100
1101 /* similar part for the q and p products */
460c0abf 1102 for(j=0;j+1<order;j+=2) {
07c55d8e
AJ
1103 q *= lsp[j] -two_cos_w;
1104 p *= lsp[j+1]-two_cos_w;
1105 }
1106 if(j==order) { // even order
1107 p *= p*(2.0f-two_cos_w);
1108 q *= q*(2.0f+two_cos_w);
5e56b30e 1109 } else { // odd order
07c55d8e
AJ
1110 q *= two_cos_w-lsp[j]; // one more time for q
1111
1112 /* final step and square */
1113 p *= p*(4.f-two_cos_w*two_cos_w);
1114 q *= q;
1115 }
1116
1117 /* calculate linear floor value */
1118 {
1119 q=exp( (
1120 ( (amplitude*vf->amplitude_offset)/
1121 (((1<<vf->amplitude_bits)-1) * sqrt(p+q)) )
1122 - vf->amplitude_offset ) * .11512925f
1123 );
1124 }
1125
1126 /* fill vector */
5e56b30e
DB
1127 do {
1128 vec[i]=q; ++i;
1129 } while (vf->map[blockflag][i]==iter_cond);
07c55d8e
AJ
1130 }
1131 }
5e56b30e 1132 } else {
07c55d8e
AJ
1133 /* this channel is unused */
1134 return 1;
1135 }
1136
1137 AV_DEBUG(" Floor0 decoded\n");
1138
1139 return 0;
1140}
1141
5e56b30e
DB
1142static uint_fast8_t vorbis_floor1_decode(vorbis_context *vc,
1143 vorbis_floor_data *vfu, float *vec)
1144{
07c55d8e
AJ
1145 vorbis_floor1 * vf=&vfu->t1;
1146 GetBitContext *gb=&vc->gb;
1147 uint_fast16_t range_v[4]={ 256, 128, 86, 64 };
1148 uint_fast16_t range=range_v[vf->multiplier-1];
1149 uint_fast16_t floor1_Y[vf->x_list_dim];
1150 uint_fast16_t floor1_Y_final[vf->x_list_dim];
1151 int floor1_flag[vf->x_list_dim];
1152 uint_fast8_t class_;
1153 uint_fast8_t cdim;
1154 uint_fast8_t cbits;
1155 uint_fast8_t csub;
1156 uint_fast8_t cval;
1157 int_fast16_t book;
1158 uint_fast16_t offset;
1159 uint_fast16_t i,j;
1160 /*u*/int_fast16_t adx, ady, off, predicted; // WTF ? dy/adx= (unsigned)dy/adx ?
1161 int_fast16_t dy, err;
1162
1163
0b8e7ab0
DB
1164 if (!get_bits1(gb)) // silence
1165 return 1;
07c55d8e
AJ
1166
1167// Read values (or differences) for the floor's points
1168
1169 floor1_Y[0]=get_bits(gb, ilog(range-1));
1170 floor1_Y[1]=get_bits(gb, ilog(range-1));
1171
1172 AV_DEBUG("floor 0 Y %d floor 1 Y %d \n", floor1_Y[0], floor1_Y[1]);
1173
1174 offset=2;
1175 for(i=0;i<vf->partitions;++i) {
1176 class_=vf->partition_class[i];
1177 cdim=vf->class_dimensions[class_];
1178 cbits=vf->class_subclasses[class_];
1179 csub=(1<<cbits)-1;
1180 cval=0;
1181
1182 AV_DEBUG("Cbits %d \n", cbits);
1183
5e56b30e 1184 if (cbits) // this reads all subclasses for this partition's class
07c55d8e
AJ
1185 cval=get_vlc2(gb, vc->codebooks[vf->class_masterbook[class_]].vlc.table,
1186 vc->codebooks[vf->class_masterbook[class_]].nb_bits, 3);
07c55d8e
AJ
1187
1188 for(j=0;j<cdim;++j) {
1189 book=vf->subclass_books[class_][cval & csub];
1190
1191 AV_DEBUG("book %d Cbits %d cval %d bits:%d \n", book, cbits, cval, get_bits_count(gb));
1192
1193 cval=cval>>cbits;
1194 if (book>-1) {
1195 floor1_Y[offset+j]=get_vlc2(gb, vc->codebooks[book].vlc.table,
1196 vc->codebooks[book].nb_bits, 3);
1197 } else {
1198 floor1_Y[offset+j]=0;
1199 }
1200
1201 AV_DEBUG(" floor(%d) = %d \n", vf->list[offset+j].x, floor1_Y[offset+j]);
1202 }
1203 offset+=cdim;
1204 }
1205
1206// Amplitude calculation from the differences
1207
1208 floor1_flag[0]=1;
1209 floor1_flag[1]=1;
1210 floor1_Y_final[0]=floor1_Y[0];
1211 floor1_Y_final[1]=floor1_Y[1];
1212
1213 for(i=2;i<vf->x_list_dim;++i) {
1214 uint_fast16_t val, highroom, lowroom, room;
1215 uint_fast16_t high_neigh_offs;
1216 uint_fast16_t low_neigh_offs;
1217
1218 low_neigh_offs=vf->list[i].low;
1219 high_neigh_offs=vf->list[i].high;
1220 dy=floor1_Y_final[high_neigh_offs]-floor1_Y_final[low_neigh_offs]; // render_point begin
1221 adx=vf->list[high_neigh_offs].x-vf->list[low_neigh_offs].x;
1222 ady= FFABS(dy);
1223 err=ady*(vf->list[i].x-vf->list[low_neigh_offs].x);
1224 off=(int16_t)err/(int16_t)adx;
1225 if (dy<0) {
1226 predicted=floor1_Y_final[low_neigh_offs]-off;
1227 } else {
1228 predicted=floor1_Y_final[low_neigh_offs]+off;
1229 } // render_point end
1230
1231 val=floor1_Y[i];
1232 highroom=range-predicted;
1233 lowroom=predicted;
1234 if (highroom < lowroom) {
1235 room=highroom*2;
1236 } else {
1237 room=lowroom*2; // SPEC mispelling
1238 }
1239 if (val) {
1240 floor1_flag[low_neigh_offs]=1;
1241 floor1_flag[high_neigh_offs]=1;
1242 floor1_flag[i]=1;
1243 if (val>=room) {
1244 if (highroom > lowroom) {
1245 floor1_Y_final[i]=val-lowroom+predicted;
1246 } else {
1247 floor1_Y_final[i]=predicted-val+highroom-1;
1248 }
1249 } else {
1250 if (val & 1) {
1251 floor1_Y_final[i]=predicted-(val+1)/2;
1252 } else {
1253 floor1_Y_final[i]=predicted+val/2;
1254 }
1255 }
1256 } else {
1257 floor1_flag[i]=0;
1258 floor1_Y_final[i]=predicted;
1259 }
1260
1261 AV_DEBUG(" Decoded floor(%d) = %d / val %d \n", vf->list[i].x, floor1_Y_final[i], val);
1262 }
1263
1264// Curve synth - connect the calculated dots and convert from dB scale FIXME optimize ?
1265
1266 ff_vorbis_floor1_render_list(vf->list, vf->x_list_dim, floor1_Y_final, floor1_flag, vf->multiplier, vec, vf->list[1].x);
1267
1268 AV_DEBUG(" Floor decoded\n");
1269
1270 return 0;
1271}
1272
1273// Read and decode residue
1274
5e56b30e
DB
1275static av_always_inline int vorbis_residue_decode_internal(vorbis_context *vc,
1276 vorbis_residue *vr,
1277 uint_fast8_t ch,
1278 uint_fast8_t *do_not_decode,
1279 float *vec,
1280 uint_fast16_t
1281 vlen, int vr_type)
1282{
07c55d8e
AJ
1283 GetBitContext *gb=&vc->gb;
1284 uint_fast8_t c_p_c=vc->codebooks[vr->classbook].dimensions;
1285 uint_fast16_t n_to_read=vr->end-vr->begin;
1286 uint_fast16_t ptns_to_read=n_to_read/vr->partition_size;
1287 uint_fast8_t classifs[ptns_to_read*vc->audio_channels];
1288 uint_fast8_t pass;
1289 uint_fast8_t ch_used;
1290 uint_fast8_t i,j,l;
1291 uint_fast16_t k;
1292
c541e668 1293 if (vr_type==2) {
5e56b30e 1294 for(j=1;j<ch;++j)
07c55d8e 1295 do_not_decode[0]&=do_not_decode[j]; // FIXME - clobbering input
5e56b30e
DB
1296 if (do_not_decode[0])
1297 return 0;
07c55d8e
AJ
1298 ch_used=1;
1299 } else {
1300 ch_used=ch;
1301 }
1302
1303 AV_DEBUG(" residue type 0/1/2 decode begin, ch: %d cpc %d \n", ch, c_p_c);
1304
1305 for(pass=0;pass<=vr->maxpass;++pass) { // FIXME OPTIMIZE?
1306 uint_fast16_t voffset;
1307 uint_fast16_t partition_count;
1308 uint_fast16_t j_times_ptns_to_read;
1309
1310 voffset=vr->begin;
1311 for(partition_count=0;partition_count<ptns_to_read;) { // SPEC error
1312 if (!pass) {
1313 uint_fast32_t inverse_class = ff_inverse[vr->classifications];
1314 for(j_times_ptns_to_read=0, j=0;j<ch_used;++j) {
1315 if (!do_not_decode[j]) {
1316 uint_fast32_t temp=get_vlc2(gb, vc->codebooks[vr->classbook].vlc.table,
1317 vc->codebooks[vr->classbook].nb_bits, 3);
1318
1319 AV_DEBUG("Classword: %d \n", temp);
1320
1321 assert(vr->classifications > 1 && temp<=65536); //needed for inverse[]
1322 for(i=0;i<c_p_c;++i) {
1323 uint_fast32_t temp2;
1324
1325 temp2=(((uint_fast64_t)temp) * inverse_class)>>32;
5e56b30e 1326 if (partition_count+c_p_c-1-i < ptns_to_read)
07c55d8e 1327 classifs[j_times_ptns_to_read+partition_count+c_p_c-1-i]=temp-temp2*vr->classifications;
07c55d8e
AJ
1328 temp=temp2;
1329 }
1330 }
1331 j_times_ptns_to_read+=ptns_to_read;
1332 }
1333 }
1334 for(i=0;(i<c_p_c) && (partition_count<ptns_to_read);++i) {
1335 for(j_times_ptns_to_read=0, j=0;j<ch_used;++j) {
1336 uint_fast16_t voffs;
1337
1338 if (!do_not_decode[j]) {
1339 uint_fast8_t vqclass=classifs[j_times_ptns_to_read+partition_count];
1340 int_fast16_t vqbook=vr->books[vqclass][pass];
1341
975741e7 1342 if (vqbook>=0 && vc->codebooks[vqbook].codevectors) {
07c55d8e
AJ
1343 uint_fast16_t coffs;
1344 unsigned dim= vc->codebooks[vqbook].dimensions; // not uint_fast8_t: 64bit is slower here on amd64
1345 uint_fast16_t step= dim==1 ? vr->partition_size
1346 : FASTDIV(vr->partition_size, dim);
1347 vorbis_codebook codebook= vc->codebooks[vqbook];
1348
c541e668 1349 if (vr_type==0) {
07c55d8e
AJ
1350
1351 voffs=voffset+j*vlen;
1352 for(k=0;k<step;++k) {
1353 coffs=get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * dim;
5e56b30e 1354 for(l=0;l<dim;++l)
07c55d8e 1355 vec[voffs+k+l*step]+=codebook.codevectors[coffs+l]; // FPMATH
07c55d8e 1356 }
5e56b30e 1357 } else if (vr_type==1) {
07c55d8e
AJ
1358 voffs=voffset+j*vlen;
1359 for(k=0;k<step;++k) {
1360 coffs=get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * dim;
1361 for(l=0;l<dim;++l, ++voffs) {
1362 vec[voffs]+=codebook.codevectors[coffs+l]; // FPMATH
1363
1364 AV_DEBUG(" pass %d offs: %d curr: %f change: %f cv offs.: %d \n", pass, voffs, vec[voffs], codebook.codevectors[coffs+l], coffs);
1365 }
1366 }
5e56b30e 1367 } else if (vr_type==2 && ch==2 && (voffset&1)==0 && (dim&1)==0) { // most frequent case optimized
07c55d8e
AJ
1368 voffs=voffset>>1;
1369
1370 if(dim==2) {
1371 for(k=0;k<step;++k) {
1372 coffs=get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * 2;
1373 vec[voffs+k ]+=codebook.codevectors[coffs ]; // FPMATH
1374 vec[voffs+k+vlen]+=codebook.codevectors[coffs+1]; // FPMATH
1375 }
1a325367
LM
1376 } else if(dim==4) {
1377 for(k=0;k<step;++k, voffs+=2) {
1378 coffs=get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * 4;
1379 vec[voffs ]+=codebook.codevectors[coffs ]; // FPMATH
1380 vec[voffs+1 ]+=codebook.codevectors[coffs+2]; // FPMATH
1381 vec[voffs+vlen ]+=codebook.codevectors[coffs+1]; // FPMATH
1382 vec[voffs+vlen+1]+=codebook.codevectors[coffs+3]; // FPMATH
1383 }
07c55d8e
AJ
1384 } else
1385 for(k=0;k<step;++k) {
1386 coffs=get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * dim;
1387 for(l=0;l<dim;l+=2, voffs++) {
1388 vec[voffs ]+=codebook.codevectors[coffs+l ]; // FPMATH
1389 vec[voffs+vlen]+=codebook.codevectors[coffs+l+1]; // FPMATH
1390
1391 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);
1392 }
1393 }
1394
5e56b30e 1395 } else if (vr_type==2) {
07c55d8e
AJ
1396 voffs=voffset;
1397
1398 for(k=0;k<step;++k) {
1399 coffs=get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * dim;
1400 for(l=0;l<dim;++l, ++voffs) {
1401 vec[voffs/ch+(voffs%ch)*vlen]+=codebook.codevectors[coffs+l]; // FPMATH FIXME use if and counter instead of / and %
1402
1403 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);
1404 }
1405 }
07c55d8e
AJ
1406 }
1407 }
1408 }
1409 j_times_ptns_to_read+=ptns_to_read;
1410 }
1411 ++partition_count;
1412 voffset+=vr->partition_size;
1413 }
1414 }
1415 }
1416 return 0;
1417}
1418
5e56b30e
DB
1419static inline int vorbis_residue_decode(vorbis_context *vc, vorbis_residue *vr,
1420 uint_fast8_t ch,
1421 uint_fast8_t *do_not_decode,
1422 float *vec, uint_fast16_t vlen)
c541e668
MN
1423{
1424 if (vr->type==2)
1425 return vorbis_residue_decode_internal(vc, vr, ch, do_not_decode, vec, vlen, 2);
1426 else if (vr->type==1)
1427 return vorbis_residue_decode_internal(vc, vr, ch, do_not_decode, vec, vlen, 1);
1428 else if (vr->type==0)
1429 return vorbis_residue_decode_internal(vc, vr, ch, do_not_decode, vec, vlen, 0);
1430 else {
1431 av_log(vc->avccontext, AV_LOG_ERROR, " Invalid residue type while residue decode?! \n");
0a01efd0 1432 return -1;
c541e668
MN
1433 }
1434}
1435
07c55d8e
AJ
1436void vorbis_inverse_coupling(float *mag, float *ang, int blocksize)
1437{
1438 int i;
5e56b30e 1439 for(i=0; i<blocksize; i++) {
07c55d8e
AJ
1440 if (mag[i]>0.0) {
1441 if (ang[i]>0.0) {
1442 ang[i]=mag[i]-ang[i];
1443 } else {
1444 float temp=ang[i];
1445 ang[i]=mag[i];
1446 mag[i]+=temp;
1447 }
1448 } else {
1449 if (ang[i]>0.0) {
1450 ang[i]+=mag[i];
1451 } else {
1452 float temp=ang[i];
1453 ang[i]=mag[i];
1454 mag[i]-=temp;
1455 }
1456 }
1457 }
1458}
1459
5e56b30e
DB
1460static void copy_normalize(float *dst, float *src, int len, int exp_bias,
1461 float add_bias)
f27e1d64
LM
1462{
1463 int i;
1464 if(exp_bias) {
37317794 1465 memcpy(dst, src, len * sizeof(float));
f27e1d64
LM
1466 } else {
1467 for(i=0; i<len; i++)
1468 dst[i] = src[i] + add_bias;
1469 }
1470}
1471
07c55d8e
AJ
1472// Decode the audio packet using the functions above
1473
5e56b30e
DB
1474static int vorbis_parse_audio_packet(vorbis_context *vc)
1475{
07c55d8e
AJ
1476 GetBitContext *gb=&vc->gb;
1477
f27e1d64 1478 uint_fast8_t previous_window=vc->previous_window;
07c55d8e 1479 uint_fast8_t mode_number;
f27e1d64 1480 uint_fast8_t blockflag;
07c55d8e 1481 uint_fast16_t blocksize;
9d2b5cf2 1482 int_fast32_t i,j;
07c55d8e
AJ
1483 uint_fast8_t no_residue[vc->audio_channels];
1484 uint_fast8_t do_not_decode[vc->audio_channels];
1485 vorbis_mapping *mapping;
1486 float *ch_res_ptr=vc->channel_residues;
1487 float *ch_floor_ptr=vc->channel_floors;
1488 uint_fast8_t res_chan[vc->audio_channels];
1489 uint_fast8_t res_num=0;
1490 int_fast16_t retlen=0;
07c55d8e
AJ
1491 float fadd_bias = vc->add_bias;
1492
1493 if (get_bits1(gb)) {
1494 av_log(vc->avccontext, AV_LOG_ERROR, "Not a Vorbis I audio packet.\n");
1495 return -1; // packet type not audio
1496 }
1497
1498 if (vc->mode_count==1) {
1499 mode_number=0;
1500 } else {
1501 mode_number=get_bits(gb, ilog(vc->mode_count-1));
1502 }
e5b0cfb5
GC
1503 if (mode_number>=vc->mode_count) {
1504 av_log(vc->avccontext, AV_LOG_ERROR, "mode number %d out of range.\n", mode_number);
1505 return -1;
1506 }
07c55d8e
AJ
1507 vc->mode_number=mode_number;
1508 mapping=&vc->mappings[vc->modes[mode_number].mapping];
1509
1510 AV_DEBUG(" Mode number: %d , mapping: %d , blocktype %d \n", mode_number, vc->modes[mode_number].mapping, vc->modes[mode_number].blockflag);
1511
f27e1d64
LM
1512 blockflag=vc->modes[mode_number].blockflag;
1513 blocksize=vc->blocksize[blockflag];
5e56b30e 1514 if (blockflag)
f27e1d64 1515 skip_bits(gb, 2); // previous_window, next_window
07c55d8e 1516
07c55d8e
AJ
1517 memset(ch_res_ptr, 0, sizeof(float)*vc->audio_channels*blocksize/2); //FIXME can this be removed ?
1518 memset(ch_floor_ptr, 0, sizeof(float)*vc->audio_channels*blocksize/2); //FIXME can this be removed ?
1519
1520// Decode floor
1521
1522 for(i=0;i<vc->audio_channels;++i) {
1523 vorbis_floor *floor;
1524 if (mapping->submaps>1) {
1525 floor=&vc->floors[mapping->submap_floor[mapping->mux[i]]];
1526 } else {
1527 floor=&vc->floors[mapping->submap_floor[0]];
1528 }
1529
1530 no_residue[i]=floor->decode(vc, &floor->data, ch_floor_ptr);
1531 ch_floor_ptr+=blocksize/2;
1532 }
1533
1534// Nonzero vector propagate
1535
1536 for(i=mapping->coupling_steps-1;i>=0;--i) {
1537 if (!(no_residue[mapping->magnitude[i]] & no_residue[mapping->angle[i]])) {
1538 no_residue[mapping->magnitude[i]]=0;
1539 no_residue[mapping->angle[i]]=0;
1540 }
1541 }
1542
1543// Decode residue
1544
1545 for(i=0;i<mapping->submaps;++i) {
1546 vorbis_residue *residue;
1547 uint_fast8_t ch=0;
1548
1549 for(j=0;j<vc->audio_channels;++j) {
08c8742c 1550 if ((mapping->submaps==1) || (i==mapping->mux[j])) {
07c55d8e
AJ
1551 res_chan[j]=res_num;
1552 if (no_residue[j]) {
1553 do_not_decode[ch]=1;
1554 } else {
1555 do_not_decode[ch]=0;
1556 }
1557 ++ch;
1558 ++res_num;
1559 }
1560 }
1561 residue=&vc->residues[mapping->submap_residue[i]];
1562 vorbis_residue_decode(vc, residue, ch, do_not_decode, ch_res_ptr, blocksize/2);
1563
1564 ch_res_ptr+=ch*blocksize/2;
1565 }
1566
1567// Inverse coupling
1568
1569 for(i=mapping->coupling_steps-1;i>=0;--i) { //warning: i has to be signed
1570 float *mag, *ang;
1571
1572 mag=vc->channel_residues+res_chan[mapping->magnitude[i]]*blocksize/2;
1573 ang=vc->channel_residues+res_chan[mapping->angle[i]]*blocksize/2;
1574 vc->dsp.vorbis_inverse_coupling(mag, ang, blocksize/2);
1575 }
1576
9d2b5cf2 1577// Dotproduct, MDCT
07c55d8e 1578
9d2b5cf2
SS
1579 for(j=vc->audio_channels-1;j>=0;j--) {
1580 ch_floor_ptr=vc->channel_floors+j*blocksize/2;
07c55d8e
AJ
1581 ch_res_ptr=vc->channel_residues+res_chan[j]*blocksize/2;
1582 vc->dsp.vector_fmul(ch_floor_ptr, ch_res_ptr, blocksize/2);
9d2b5cf2 1583 ff_imdct_half(&vc->mdct[blockflag], ch_res_ptr, ch_floor_ptr);
07c55d8e
AJ
1584 }
1585
9d2b5cf2 1586// Overlap/add, save data for next overlapping FPMATH
07c55d8e 1587
f27e1d64 1588 retlen = (blocksize + vc->blocksize[previous_window])/4;
9d2b5cf2 1589 for(j=0;j<vc->audio_channels;j++) {
f27e1d64
LM
1590 uint_fast16_t bs0=vc->blocksize[0];
1591 uint_fast16_t bs1=vc->blocksize[1];
633d9def 1592 float *residue=vc->channel_residues+res_chan[j]*blocksize/2;
b9fa3208 1593 float *saved=vc->saved+j*bs1/4;
46803f4f
LM
1594 float *ret=vc->channel_floors+j*retlen;
1595 float *buf=residue;
f27e1d64 1596 const float *win=vc->win[blockflag&previous_window];
07c55d8e 1597
f27e1d64 1598 if(blockflag == previous_window) {
b9fa3208 1599 vc->dsp.vector_fmul_window(ret, saved, buf, win, fadd_bias, blocksize/4);
f27e1d64 1600 } else if(blockflag > previous_window) {
b9fa3208
LM
1601 vc->dsp.vector_fmul_window(ret, saved, buf, win, fadd_bias, bs0/4);
1602 copy_normalize(ret+bs0/2, buf+bs0/4, (bs1-bs0)/4, vc->exp_bias, fadd_bias);
07c55d8e 1603 } else {
f27e1d64 1604 copy_normalize(ret, saved, (bs1-bs0)/4, vc->exp_bias, fadd_bias);
b9fa3208 1605 vc->dsp.vector_fmul_window(ret+(bs1-bs0)/4, saved+(bs1-bs0)/4, buf, win, fadd_bias, bs0/4);
07c55d8e 1606 }
b9fa3208 1607 memcpy(saved, buf+blocksize/4, blocksize/4*sizeof(float));
07c55d8e 1608 }
07c55d8e 1609
f27e1d64
LM
1610 vc->previous_window = blockflag;
1611 return retlen;
07c55d8e
AJ
1612}
1613
1614// Return the decoded audio packet through the standard api
1615
1616static int vorbis_decode_frame(AVCodecContext *avccontext,
1617 void *data, int *data_size,
7a00bbad 1618 AVPacket *avpkt)
07c55d8e 1619{
7a00bbad
TB
1620 const uint8_t *buf = avpkt->data;
1621 int buf_size = avpkt->size;
07c55d8e
AJ
1622 vorbis_context *vc = avccontext->priv_data ;
1623 GetBitContext *gb = &(vc->gb);
5eb0f2a4
LM
1624 const float *channel_ptrs[vc->audio_channels];
1625 int i;
07c55d8e
AJ
1626
1627 int_fast16_t len;
1628
5e56b30e 1629 if(!buf_size)
07c55d8e 1630 return 0;
07c55d8e
AJ
1631
1632 AV_DEBUG("packet length %d \n", buf_size);
1633
1634 init_get_bits(gb, buf, buf_size*8);
1635
1636 len=vorbis_parse_audio_packet(vc);
1637
1638 if (len<=0) {
1639 *data_size=0;
1640 return buf_size;
1641 }
1642
1643 if (!vc->first_frame) {
1644 vc->first_frame=1;
1645 *data_size=0;
1646 return buf_size ;
1647 }
1648
1649 AV_DEBUG("parsed %d bytes %d bits, returned %d samples (*ch*bits) \n", get_bits_count(gb)/8, get_bits_count(gb)%8, len);
1650
5eb0f2a4 1651 for(i=0; i<vc->audio_channels; i++)
46803f4f 1652 channel_ptrs[i] = vc->channel_floors+i*len;
5eb0f2a4 1653 vc->dsp.float_to_int16_interleave(data, channel_ptrs, len, vc->audio_channels);
f27e1d64 1654 *data_size=len*2*vc->audio_channels;
07c55d8e
AJ
1655
1656 return buf_size ;
1657}
1658
1659// Close decoder
1660
5e56b30e
DB
1661static av_cold int vorbis_decode_close(AVCodecContext *avccontext)
1662{
07c55d8e
AJ
1663 vorbis_context *vc = avccontext->priv_data;
1664
1665 vorbis_free(vc);
1666
1667 return 0 ;
1668}
1669
1670AVCodec vorbis_decoder = {
1671 "vorbis",
1672 CODEC_TYPE_AUDIO,
1673 CODEC_ID_VORBIS,
1674 sizeof(vorbis_context),
1675 vorbis_decode_init,
1676 NULL,
1677 vorbis_decode_close,
1678 vorbis_decode_frame,
fe4bf374 1679 .long_name = NULL_IF_CONFIG_SMALL("Vorbis"),
07c55d8e
AJ
1680};
1681