Refactor channel element configuration and mapping code into its own function
[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;
68 union vorbis_floor_u
69 {
70 struct vorbis_floor0_s
71 {
72 uint_fast8_t order;
73 uint_fast16_t rate;
74 uint_fast16_t bark_map_size;
75 int_fast32_t * map[2];
76 uint_fast32_t map_size[2];
77 uint_fast8_t amplitude_bits;
78 uint_fast8_t amplitude_offset;
79 uint_fast8_t num_books;
80 uint_fast8_t * book_list;
81 float * lsp;
82 } t0;
83 struct vorbis_floor1_s
84 {
85 uint_fast8_t partitions;
86 uint_fast8_t maximum_class;
87 uint_fast8_t partition_class[32];
88 uint_fast8_t class_dimensions[16];
89 uint_fast8_t class_subclasses[16];
90 uint_fast8_t class_masterbook[16];
91 int_fast16_t subclass_books[16][8];
92 uint_fast8_t multiplier;
93 uint_fast16_t x_list_dim;
05dee1b7 94 vorbis_floor1_entry * list;
07c55d8e
AJ
95 } t1;
96 } data;
97} vorbis_floor;
98
99typedef struct {
100 uint_fast16_t type;
101 uint_fast32_t begin;
102 uint_fast32_t end;
103 uint_fast32_t partition_size;
104 uint_fast8_t classifications;
105 uint_fast8_t classbook;
106 int_fast16_t books[64][8];
107 uint_fast8_t maxpass;
108} vorbis_residue;
109
110typedef struct {
111 uint_fast8_t submaps;
112 uint_fast16_t coupling_steps;
113 uint_fast8_t *magnitude;
114 uint_fast8_t *angle;
115 uint_fast8_t *mux;
116 uint_fast8_t submap_floor[16];
117 uint_fast8_t submap_residue[16];
118} vorbis_mapping;
119
120typedef struct {
121 uint_fast8_t blockflag;
122 uint_fast16_t windowtype;
123 uint_fast16_t transformtype;
124 uint_fast8_t mapping;
125} vorbis_mode;
126
127typedef struct vorbis_context_s {
128 AVCodecContext *avccontext;
129 GetBitContext gb;
130 DSPContext dsp;
131
01b22147 132 FFTContext mdct[2];
07c55d8e
AJ
133 uint_fast8_t first_frame;
134 uint_fast32_t version;
135 uint_fast8_t audio_channels;
136 uint_fast32_t audio_samplerate;
137 uint_fast32_t bitrate_maximum;
138 uint_fast32_t bitrate_nominal;
139 uint_fast32_t bitrate_minimum;
140 uint_fast32_t blocksize[2];
141 const float * win[2];
142 uint_fast16_t codebook_count;
143 vorbis_codebook *codebooks;
144 uint_fast8_t floor_count;
145 vorbis_floor *floors;
146 uint_fast8_t residue_count;
147 vorbis_residue *residues;
148 uint_fast8_t mapping_count;
149 vorbis_mapping *mappings;
150 uint_fast8_t mode_count;
151 vorbis_mode *modes;
152 uint_fast8_t mode_number; // mode number for the current packet
f27e1d64 153 uint_fast8_t previous_window;
07c55d8e
AJ
154 float *channel_residues;
155 float *channel_floors;
156 float *saved;
07c55d8e
AJ
157 uint_fast32_t add_bias; // for float->int conversion
158 uint_fast32_t exp_bias;
159} vorbis_context;
160
161/* Helper functions */
162
163#define BARK(x) \
164 (13.1f*atan(0.00074f*(x))+2.24f*atan(1.85e-8f*(x)*(x))+1e-4f*(x))
165
166static float vorbisfloat2float(uint_fast32_t val) {
167 double mant=val&0x1fffff;
168 long exp=(val&0x7fe00000L)>>21;
169 if (val&0x80000000) mant=-mant;
a5c0969a 170 return ldexp(mant, exp - 20 - 768);
07c55d8e
AJ
171}
172
173
174// Free all allocated memory -----------------------------------------
175
176static void vorbis_free(vorbis_context *vc) {
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);
201 }
202 else {
203 av_free(vc->floors[i].data.t1.list);
204 }
205 }
206 av_freep(&vc->floors);
207
208 for(i=0;i<vc->mapping_count;++i) {
209 av_free(vc->mappings[i].magnitude);
210 av_free(vc->mappings[i].angle);
211 av_free(vc->mappings[i].mux);
212 }
213 av_freep(&vc->mappings);
07c55d8e
AJ
214}
215
216// Parse setup header -------------------------------------------------
217
218// Process codebooks part
219
220static int vorbis_parse_setup_hdr_codebooks(vorbis_context *vc) {
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;
278 }
279 else tmp_vlc_bits[ce]=0;
280 }
281 } else {
282 AV_DEBUG(" not sparse \n");
283
284 used_entries=entries;
285 for(ce=0;ce<entries;++ce) {
286 tmp_vlc_bits[ce]=get_bits(gb, 5)+1;
287 }
288 }
289 } else {
290 uint_fast16_t current_entry=0;
291 uint_fast8_t current_length=get_bits(gb, 5)+1;
292
293 AV_DEBUG(" ordered, current length: %d \n", current_length); //FIXME
294
295 used_entries=entries;
1de4ba71 296 for(;current_entry<used_entries && current_length <= 32;++current_length) {
07c55d8e
AJ
297 uint_fast16_t i, number;
298
299 AV_DEBUG(" number bits: %d ", ilog(entries - current_entry));
300
301 number=get_bits(gb, ilog(entries - current_entry));
302
303 AV_DEBUG(" number: %d \n", number);
304
305 for(i=current_entry;i<number+current_entry;++i) {
306 if (i<used_entries) tmp_vlc_bits[i]=current_length;
307 }
308
309 current_entry+=number;
310 }
311 if (current_entry>used_entries) {
312 av_log(vc->avccontext, AV_LOG_ERROR, " More codelengths than codes in codebook. \n");
313 goto error;
314 }
315 }
316
317 codebook_setup->lookup_type=get_bits(gb, 4);
318
319 AV_DEBUG(" lookup type: %d : %s \n", codebook_setup->lookup_type, codebook_setup->lookup_type ? "vq" : "no lookup" );
320
321// If the codebook is used for (inverse) VQ, calculate codevectors.
322
323 if (codebook_setup->lookup_type==1) {
324 uint_fast16_t i, j, k;
325 uint_fast16_t codebook_lookup_values=ff_vorbis_nth_root(entries, codebook_setup->dimensions);
326 uint_fast16_t codebook_multiplicands[codebook_lookup_values];
327
328 float codebook_minimum_value=vorbisfloat2float(get_bits_long(gb, 32));
329 float codebook_delta_value=vorbisfloat2float(get_bits_long(gb, 32));
330 uint_fast8_t codebook_value_bits=get_bits(gb, 4)+1;
331 uint_fast8_t codebook_sequence_p=get_bits1(gb);
332
333 AV_DEBUG(" We expect %d numbers for building the codevectors. \n", codebook_lookup_values);
334 AV_DEBUG(" delta %f minmum %f \n", codebook_delta_value, codebook_minimum_value);
335
336 for(i=0;i<codebook_lookup_values;++i) {
337 codebook_multiplicands[i]=get_bits(gb, codebook_value_bits);
338
339 AV_DEBUG(" multiplicands*delta+minmum : %e \n", (float)codebook_multiplicands[i]*codebook_delta_value+codebook_minimum_value);
340 AV_DEBUG(" multiplicand %d \n", codebook_multiplicands[i]);
341 }
342
343// Weed out unused vlcs and build codevector vector
90901860 344 codebook_setup->codevectors=used_entries ? av_mallocz(used_entries*codebook_setup->dimensions * sizeof(float)) : NULL;
07c55d8e
AJ
345 for(j=0, i=0;i<entries;++i) {
346 uint_fast8_t dim=codebook_setup->dimensions;
347
348 if (tmp_vlc_bits[i]) {
349 float last=0.0;
350 uint_fast32_t lookup_offset=i;
351
352#ifdef V_DEBUG
353 av_log(vc->avccontext, AV_LOG_INFO, "Lookup offset %d ,", i);
354#endif
355
356 for(k=0;k<dim;++k) {
357 uint_fast32_t multiplicand_offset = lookup_offset % codebook_lookup_values;
358 codebook_setup->codevectors[j*dim+k]=codebook_multiplicands[multiplicand_offset]*codebook_delta_value+codebook_minimum_value+last;
359 if (codebook_sequence_p) {
360 last=codebook_setup->codevectors[j*dim+k];
361 }
362 lookup_offset/=codebook_lookup_values;
363 }
364 tmp_vlc_bits[j]=tmp_vlc_bits[i];
365
366#ifdef V_DEBUG
367 av_log(vc->avccontext, AV_LOG_INFO, "real lookup offset %d, vector: ", j);
368 for(k=0;k<dim;++k) {
369 av_log(vc->avccontext, AV_LOG_INFO, " %f ", codebook_setup->codevectors[j*dim+k]);
370 }
371 av_log(vc->avccontext, AV_LOG_INFO, "\n");
372#endif
373
374 ++j;
375 }
376 }
377 if (j!=used_entries) {
378 av_log(vc->avccontext, AV_LOG_ERROR, "Bug in codevector vector building code. \n");
379 goto error;
380 }
381 entries=used_entries;
382 }
383 else if (codebook_setup->lookup_type>=2) {
384 av_log(vc->avccontext, AV_LOG_ERROR, "Codebook lookup type not supported. \n");
385 goto error;
386 }
387
388// Initialize VLC table
389 if (ff_vorbis_len2vlc(tmp_vlc_bits, tmp_vlc_codes, entries)) {
390 av_log(vc->avccontext, AV_LOG_ERROR, " Invalid code lengths while generating vlcs. \n");
391 goto error;
392 }
393 codebook_setup->maxdepth=0;
394 for(t=0;t<entries;++t)
395 if (tmp_vlc_bits[t]>=codebook_setup->maxdepth) codebook_setup->maxdepth=tmp_vlc_bits[t];
396
397 if(codebook_setup->maxdepth > 3*V_NB_BITS) codebook_setup->nb_bits=V_NB_BITS2;
398 else codebook_setup->nb_bits=V_NB_BITS;
399
400 codebook_setup->maxdepth=(codebook_setup->maxdepth+codebook_setup->nb_bits-1)/codebook_setup->nb_bits;
401
402 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)) {
403 av_log(vc->avccontext, AV_LOG_ERROR, " Error generating vlc tables. \n");
404 goto error;
405 }
406 }
407
408 av_free(tmp_vlc_bits);
409 av_free(tmp_vlc_codes);
410 return 0;
411
412// Error:
413error:
414 av_free(tmp_vlc_bits);
415 av_free(tmp_vlc_codes);
0a01efd0 416 return -1;
07c55d8e
AJ
417}
418
419// Process time domain transforms part (unused in Vorbis I)
420
421static int vorbis_parse_setup_hdr_tdtransforms(vorbis_context *vc) {
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);
446static int vorbis_parse_setup_hdr_floors(vorbis_context *vc) {
447 GetBitContext *gb=&vc->gb;
448 uint_fast16_t i,j,k;
449
450 vc->floor_count=get_bits(gb, 6)+1;
451
90901860 452 vc->floors=av_mallocz(vc->floor_count * sizeof(vorbis_floor));
07c55d8e
AJ
453
454 for (i=0;i<vc->floor_count;++i) {
455 vorbis_floor *floor_setup=&vc->floors[i];
456
457 floor_setup->floor_type=get_bits(gb, 16);
458
459 AV_DEBUG(" %d. floor type %d \n", i, floor_setup->floor_type);
460
461 if (floor_setup->floor_type==1) {
462 uint_fast8_t maximum_class=0;
463 uint_fast8_t rangebits;
464 uint_fast16_t floor1_values=2;
465
466 floor_setup->decode=vorbis_floor1_decode;
467
468 floor_setup->data.t1.partitions=get_bits(gb, 5);
469
470 AV_DEBUG(" %d.floor: %d partitions \n", i, floor_setup->data.t1.partitions);
471
472 for(j=0;j<floor_setup->data.t1.partitions;++j) {
473 floor_setup->data.t1.partition_class[j]=get_bits(gb, 4);
474 if (floor_setup->data.t1.partition_class[j]>maximum_class) maximum_class=floor_setup->data.t1.partition_class[j];
475
476 AV_DEBUG(" %d. floor %d partition class %d \n", i, j, floor_setup->data.t1.partition_class[j]);
477
478 }
479
480 AV_DEBUG(" maximum class %d \n", maximum_class);
481
482 floor_setup->data.t1.maximum_class=maximum_class;
483
484 for(j=0;j<=maximum_class;++j) {
485 floor_setup->data.t1.class_dimensions[j]=get_bits(gb, 3)+1;
486 floor_setup->data.t1.class_subclasses[j]=get_bits(gb, 2);
487
488 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]);
489
490 if (floor_setup->data.t1.class_subclasses[j]) {
993092dc
GC
491 int bits=get_bits(gb, 8);
492 if (bits>=vc->codebook_count) {
493 av_log(vc->avccontext, AV_LOG_ERROR, "Masterbook index %d is out of range.\n", bits);
0a01efd0 494 return -1;
993092dc
GC
495 }
496 floor_setup->data.t1.class_masterbook[j]=bits;
07c55d8e
AJ
497
498 AV_DEBUG(" masterbook: %d \n", floor_setup->data.t1.class_masterbook[j]);
499 }
500
501 for(k=0;k<(1<<floor_setup->data.t1.class_subclasses[j]);++k) {
993092dc
GC
502 int16_t bits=get_bits(gb, 8)-1;
503 if (bits!=-1 && bits>=vc->codebook_count) {
504 av_log(vc->avccontext, AV_LOG_ERROR, "Subclass book index %d is out of range.\n", bits);
0a01efd0 505 return -1;
993092dc
GC
506 }
507 floor_setup->data.t1.subclass_books[j][k]=bits;
07c55d8e
AJ
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
05dee1b7 520 floor_setup->data.t1.list=av_mallocz(floor_setup->data.t1.x_list_dim * sizeof(vorbis_floor1_entry));
07c55d8e
AJ
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");
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);
0a01efd0 560 if(!floor_setup->data.t0.book_list) { return -1; }
07c55d8e
AJ
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);
96651e79 567 if (book_idx>=vc->codebook_count)
0a01efd0 568 return -1;
07c55d8e
AJ
569 floor_setup->data.t0.book_list[idx]=book_idx;
570 if (vc->codebooks[book_idx].dimensions > max_codebook_dim)
571 max_codebook_dim=vc->codebooks[book_idx].dimensions;
07c55d8e
AJ
572 }
573 }
574
575 create_map( vc, i );
576
577 /* allocate mem for lsp coefficients */
578 {
579 /* codebook dim is for padding if codebook dim doesn't *
580 * divide order+1 then we need to read more data */
581 floor_setup->data.t0.lsp=
582 av_malloc((floor_setup->data.t0.order+1 + max_codebook_dim)
583 * sizeof(float));
0a01efd0 584 if(!floor_setup->data.t0.lsp) { return -1; }
07c55d8e
AJ
585 }
586
587#ifdef V_DEBUG /* debug output parsed headers */
588 AV_DEBUG("floor0 order: %u\n", floor_setup->data.t0.order);
589 AV_DEBUG("floor0 rate: %u\n", floor_setup->data.t0.rate);
590 AV_DEBUG("floor0 bark map size: %u\n",
591 floor_setup->data.t0.bark_map_size);
592 AV_DEBUG("floor0 amplitude bits: %u\n",
593 floor_setup->data.t0.amplitude_bits);
594 AV_DEBUG("floor0 amplitude offset: %u\n",
595 floor_setup->data.t0.amplitude_offset);
596 AV_DEBUG("floor0 number of books: %u\n",
597 floor_setup->data.t0.num_books);
598 AV_DEBUG("floor0 book list pointer: %p\n",
599 floor_setup->data.t0.book_list);
600 {
601 int idx;
602 for (idx=0;idx<floor_setup->data.t0.num_books;++idx) {
603 AV_DEBUG( " Book %d: %u\n",
604 idx+1,
605 floor_setup->data.t0.book_list[idx] );
606 }
607 }
608#endif
609 }
610 else {
611 av_log(vc->avccontext, AV_LOG_ERROR, "Invalid floor type!\n");
0a01efd0 612 return -1;
07c55d8e
AJ
613 }
614 }
615 return 0;
616}
617
618// Process residues part
619
620static int vorbis_parse_setup_hdr_residues(vorbis_context *vc){
621 GetBitContext *gb=&vc->gb;
622 uint_fast8_t i, j, k;
623
624 vc->residue_count=get_bits(gb, 6)+1;
90901860 625 vc->residues=av_mallocz(vc->residue_count * sizeof(vorbis_residue));
07c55d8e
AJ
626
627 AV_DEBUG(" There are %d residues. \n", vc->residue_count);
628
629 for(i=0;i<vc->residue_count;++i) {
630 vorbis_residue *res_setup=&vc->residues[i];
631 uint_fast8_t cascade[64];
632 uint_fast8_t high_bits;
633 uint_fast8_t low_bits;
634
635 res_setup->type=get_bits(gb, 16);
636
637 AV_DEBUG(" %d. residue type %d \n", i, res_setup->type);
638
639 res_setup->begin=get_bits(gb, 24);
640 res_setup->end=get_bits(gb, 24);
641 res_setup->partition_size=get_bits(gb, 24)+1;
36b7e983
GC
642 /* Validations to prevent a buffer overflow later. */
643 if (res_setup->begin>res_setup->end
644 || res_setup->end>vc->blocksize[1]/(res_setup->type==2?1:2)
645 || (res_setup->end-res_setup->begin)/res_setup->partition_size>V_MAX_PARTITIONS) {
c31afa5d 646 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 647 return -1;
36b7e983
GC
648 }
649
07c55d8e
AJ
650 res_setup->classifications=get_bits(gb, 6)+1;
651 res_setup->classbook=get_bits(gb, 8);
79a42581
GC
652 if (res_setup->classbook>=vc->codebook_count) {
653 av_log(vc->avccontext, AV_LOG_ERROR, "classbook value %d out of range. \n", res_setup->classbook);
0a01efd0 654 return -1;
79a42581 655 }
07c55d8e
AJ
656
657 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,
658 res_setup->classifications, res_setup->classbook);
659
660 for(j=0;j<res_setup->classifications;++j) {
661 high_bits=0;
662 low_bits=get_bits(gb, 3);
663 if (get_bits1(gb)) {
664 high_bits=get_bits(gb, 5);
665 }
666 cascade[j]=(high_bits<<3)+low_bits;
667
668 AV_DEBUG(" %d class casscade depth: %d \n", j, ilog(cascade[j]));
669 }
670
671 res_setup->maxpass=0;
672 for(j=0;j<res_setup->classifications;++j) {
673 for(k=0;k<8;++k) {
674 if (cascade[j]&(1<<k)) {
cdf1512e
GC
675 int bits=get_bits(gb, 8);
676 if (bits>=vc->codebook_count) {
677 av_log(vc->avccontext, AV_LOG_ERROR, "book value %d out of range. \n", bits);
0a01efd0 678 return -1;
cdf1512e
GC
679 }
680 res_setup->books[j][k]=bits;
07c55d8e
AJ
681
682 AV_DEBUG(" %d class casscade depth %d book: %d \n", j, k, res_setup->books[j][k]);
683
684 if (k>res_setup->maxpass) {
685 res_setup->maxpass=k;
686 }
687 } else {
688 res_setup->books[j][k]=-1;
689 }
690 }
691 }
692 }
693 return 0;
694}
695
696// Process mappings part
697
698static int vorbis_parse_setup_hdr_mappings(vorbis_context *vc) {
699 GetBitContext *gb=&vc->gb;
700 uint_fast8_t i, j;
701
702 vc->mapping_count=get_bits(gb, 6)+1;
90901860 703 vc->mappings=av_mallocz(vc->mapping_count * sizeof(vorbis_mapping));
07c55d8e
AJ
704
705 AV_DEBUG(" There are %d mappings. \n", vc->mapping_count);
706
707 for(i=0;i<vc->mapping_count;++i) {
708 vorbis_mapping *mapping_setup=&vc->mappings[i];
709
710 if (get_bits(gb, 16)) {
711 av_log(vc->avccontext, AV_LOG_ERROR, "Other mappings than type 0 are not compliant with the Vorbis I specification. \n");
0a01efd0 712 return -1;
07c55d8e
AJ
713 }
714 if (get_bits1(gb)) {
715 mapping_setup->submaps=get_bits(gb, 4)+1;
716 } else {
717 mapping_setup->submaps=1;
718 }
719
720 if (get_bits1(gb)) {
721 mapping_setup->coupling_steps=get_bits(gb, 8)+1;
90901860
MN
722 mapping_setup->magnitude=av_mallocz(mapping_setup->coupling_steps * sizeof(uint_fast8_t));
723 mapping_setup->angle =av_mallocz(mapping_setup->coupling_steps * sizeof(uint_fast8_t));
07c55d8e
AJ
724 for(j=0;j<mapping_setup->coupling_steps;++j) {
725 mapping_setup->magnitude[j]=get_bits(gb, ilog(vc->audio_channels-1));
726 mapping_setup->angle[j]=get_bits(gb, ilog(vc->audio_channels-1));
d70fa8f1
GC
727 if (mapping_setup->magnitude[j]>=vc->audio_channels) {
728 av_log(vc->avccontext, AV_LOG_ERROR, "magnitude channel %d out of range. \n", mapping_setup->magnitude[j]);
0a01efd0 729 return -1;
d70fa8f1
GC
730 }
731 if (mapping_setup->angle[j]>=vc->audio_channels) {
732 av_log(vc->avccontext, AV_LOG_ERROR, "angle channel %d out of range. \n", mapping_setup->angle[j]);
0a01efd0 733 return -1;
d70fa8f1 734 }
07c55d8e
AJ
735 }
736 } else {
737 mapping_setup->coupling_steps=0;
738 }
739
740 AV_DEBUG(" %d mapping coupling steps: %d \n", i, mapping_setup->coupling_steps);
741
742 if(get_bits(gb, 2)) {
743 av_log(vc->avccontext, AV_LOG_ERROR, "%d. mapping setup data invalid. \n", i);
0a01efd0 744 return -1; // following spec.
07c55d8e
AJ
745 }
746
747 if (mapping_setup->submaps>1) {
90901860 748 mapping_setup->mux=av_mallocz(vc->audio_channels * sizeof(uint_fast8_t));
07c55d8e
AJ
749 for(j=0;j<vc->audio_channels;++j) {
750 mapping_setup->mux[j]=get_bits(gb, 4);
751 }
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
787 for (blockflag=0;blockflag<2;++blockflag)
788 {
789 n=vc->blocksize[blockflag]/2;
790 floors[floor_number].data.t0.map[blockflag]=
791 av_malloc((n+1) * sizeof(int_fast32_t)); // n+sentinel
792
793 map=floors[floor_number].data.t0.map[blockflag];
794 vf=&floors[floor_number].data.t0;
795
796 for (idx=0; idx<n;++idx) {
797 map[idx]=floor( BARK((vf->rate*idx)/(2.0f*n)) *
798 ((vf->bark_map_size)/
799 BARK(vf->rate/2.0f )) );
800 if (vf->bark_map_size-1 < map[idx]) {
801 map[idx]=vf->bark_map_size-1;
802 }
803 }
804 map[n]=-1;
805 vf->map_size[blockflag]=n;
806 }
807
808# ifdef V_DEBUG
809 for(idx=0;idx<=n;++idx) {
810 AV_DEBUG("floor0 map: map at pos %d is %d\n",
811 idx, map[idx]);
812 }
813# endif
814}
815
816static int vorbis_parse_setup_hdr_modes(vorbis_context *vc) {
817 GetBitContext *gb=&vc->gb;
818 uint_fast8_t i;
819
820 vc->mode_count=get_bits(gb, 6)+1;
90901860 821 vc->modes=av_mallocz(vc->mode_count * sizeof(vorbis_mode));
07c55d8e
AJ
822
823 AV_DEBUG(" There are %d modes.\n", vc->mode_count);
824
825 for(i=0;i<vc->mode_count;++i) {
826 vorbis_mode *mode_setup=&vc->modes[i];
827
5fc32c27 828 mode_setup->blockflag=get_bits1(gb);
07c55d8e
AJ
829 mode_setup->windowtype=get_bits(gb, 16); //FIXME check
830 mode_setup->transformtype=get_bits(gb, 16); //FIXME check
e5b0cfb5
GC
831 mode_setup->mapping=get_bits(gb, 8);
832 if (mode_setup->mapping>=vc->mapping_count) {
833 av_log(vc->avccontext, AV_LOG_ERROR, "mode mapping value %d out of range. \n", mode_setup->mapping);
0a01efd0 834 return -1;
e5b0cfb5 835 }
07c55d8e
AJ
836
837 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);
838 }
839 return 0;
840}
841
842// Process the whole setup header using the functions above
843
844static int vorbis_parse_setup_hdr(vorbis_context *vc) {
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
888static int vorbis_parse_id_hdr(vorbis_context *vc){
889 GetBitContext *gb=&vc->gb;
890 uint_fast8_t bl0, bl1;
891
892 if ((get_bits(gb, 8)!='v') || (get_bits(gb, 8)!='o') ||
893 (get_bits(gb, 8)!='r') || (get_bits(gb, 8)!='b') ||
894 (get_bits(gb, 8)!='i') || (get_bits(gb, 8)!='s')) {
895 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis id header packet corrupt (no vorbis signature). \n");
0a01efd0 896 return -1;
07c55d8e
AJ
897 }
898
899 vc->version=get_bits_long(gb, 32); //FIXME check 0
9062cd35
MN
900 vc->audio_channels=get_bits(gb, 8);
901 if(vc->audio_channels <= 0){
902 av_log(vc->avccontext, AV_LOG_ERROR, "Invalid number of channels\n");
903 return -1;
904 }
905 vc->audio_samplerate=get_bits_long(gb, 32);
906 if(vc->audio_samplerate <= 0){
907 av_log(vc->avccontext, AV_LOG_ERROR, "Invalid samplerate\n");
908 return -1;
909 }
07c55d8e
AJ
910 vc->bitrate_maximum=get_bits_long(gb, 32);
911 vc->bitrate_nominal=get_bits_long(gb, 32);
912 vc->bitrate_minimum=get_bits_long(gb, 32);
913 bl0=get_bits(gb, 4);
914 bl1=get_bits(gb, 4);
915 vc->blocksize[0]=(1<<bl0);
916 vc->blocksize[1]=(1<<bl1);
917 if (bl0>13 || bl0<6 || bl1>13 || bl1<6 || bl1<bl0) {
918 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis id header packet corrupt (illegal blocksize). \n");
0a01efd0 919 return -3;
07c55d8e
AJ
920 }
921 // output format int16
922 if (vc->blocksize[1]/2 * vc->audio_channels * 2 >
923 AVCODEC_MAX_AUDIO_FRAME_SIZE) {
924 av_log(vc->avccontext, AV_LOG_ERROR, "Vorbis channel count makes "
925 "output packets too large.\n");
0a01efd0 926 return -4;
07c55d8e
AJ
927 }
928 vc->win[0]=ff_vorbis_vwin[bl0-6];
929 vc->win[1]=ff_vorbis_vwin[bl1-6];
930
07c55d8e
AJ
931 if ((get_bits1(gb)) == 0) {
932 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis id header packet corrupt (framing flag not set). \n");
0a01efd0 933 return -2;
07c55d8e
AJ
934 }
935
90901860
MN
936 vc->channel_residues= av_malloc((vc->blocksize[1]/2)*vc->audio_channels * sizeof(float));
937 vc->channel_floors = av_malloc((vc->blocksize[1]/2)*vc->audio_channels * sizeof(float));
b9fa3208 938 vc->saved = av_mallocz((vc->blocksize[1]/4)*vc->audio_channels * sizeof(float));
f27e1d64 939 vc->previous_window=0;
07c55d8e 940
37317794
SS
941 ff_mdct_init(&vc->mdct[0], bl0, 1, vc->exp_bias ? -(1<<15) : -1.0);
942 ff_mdct_init(&vc->mdct[1], bl1, 1, vc->exp_bias ? -(1<<15) : -1.0);
07c55d8e
AJ
943
944 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 ",
945 vc->version, vc->audio_channels, vc->audio_samplerate, vc->bitrate_maximum, vc->bitrate_nominal, vc->bitrate_minimum, vc->blocksize[0], vc->blocksize[1]);
946
947/*
948 BLK=vc->blocksize[0];
949 for(i=0;i<BLK/2;++i) {
950 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)));
951 }
952*/
953
954 return 0;
955}
956
957// Process the extradata using the functions above (identification header, setup header)
958
98a6fff9 959static av_cold int vorbis_decode_init(AVCodecContext *avccontext) {
07c55d8e
AJ
960 vorbis_context *vc = avccontext->priv_data ;
961 uint8_t *headers = avccontext->extradata;
962 int headers_len=avccontext->extradata_size;
963 uint8_t *header_start[3];
964 int header_len[3];
965 GetBitContext *gb = &(vc->gb);
966 int hdr_type;
967
968 vc->avccontext = avccontext;
969 dsputil_init(&vc->dsp, avccontext);
970
8a37920c 971 if(vc->dsp.float_to_int16_interleave == ff_float_to_int16_interleave_c) {
07c55d8e
AJ
972 vc->add_bias = 385;
973 vc->exp_bias = 0;
974 } else {
975 vc->add_bias = 0;
976 vc->exp_bias = 15<<23;
977 }
978
979 if (!headers_len) {
980 av_log(avccontext, AV_LOG_ERROR, "Extradata corrupt.\n");
981 return -1;
982 }
983
984 if (ff_split_xiph_headers(headers, headers_len, 30, header_start, header_len) < 0) {
985 av_log(avccontext, AV_LOG_ERROR, "Extradata corrupt.\n");
986 return -1;
987 }
988
989 init_get_bits(gb, header_start[0], header_len[0]*8);
990 hdr_type=get_bits(gb, 8);
991 if (hdr_type!=1) {
992 av_log(avccontext, AV_LOG_ERROR, "First header is not the id header.\n");
993 return -1;
994 }
995 if (vorbis_parse_id_hdr(vc)) {
996 av_log(avccontext, AV_LOG_ERROR, "Id header corrupt.\n");
997 vorbis_free(vc);
998 return -1;
999 }
1000
1001 init_get_bits(gb, header_start[2], header_len[2]*8);
1002 hdr_type=get_bits(gb, 8);
1003 if (hdr_type!=5) {
1004 av_log(avccontext, AV_LOG_ERROR, "Third header is not the setup header.\n");
c8562a6f 1005 vorbis_free(vc);
07c55d8e
AJ
1006 return -1;
1007 }
1008 if (vorbis_parse_setup_hdr(vc)) {
1009 av_log(avccontext, AV_LOG_ERROR, "Setup header corrupt.\n");
1010 vorbis_free(vc);
1011 return -1;
1012 }
1013
1014 avccontext->channels = vc->audio_channels;
1015 avccontext->sample_rate = vc->audio_samplerate;
da95f225 1016 avccontext->frame_size = FFMIN(vc->blocksize[0], vc->blocksize[1])>>2;
fd76c37f 1017 avccontext->sample_fmt = SAMPLE_FMT_S16;
07c55d8e
AJ
1018
1019 return 0 ;
1020}
1021
1022// Decode audiopackets -------------------------------------------------
1023
1024// Read and decode floor
1025
1026static uint_fast8_t vorbis_floor0_decode(vorbis_context *vc,
1027 vorbis_floor_data *vfu, float *vec) {
1028 vorbis_floor0 * vf=&vfu->t0;
1029 float * lsp=vf->lsp;
1030 uint_fast32_t amplitude;
1031 uint_fast32_t book_idx;
1032 uint_fast8_t blockflag=vc->modes[vc->mode_number].blockflag;
1033
1034 amplitude=get_bits(&vc->gb, vf->amplitude_bits);
1035 if (amplitude>0) {
1036 float last = 0;
1037 uint_fast16_t lsp_len = 0;
1038 uint_fast16_t idx;
1039 vorbis_codebook codebook;
1040
1041 book_idx=get_bits(&vc->gb, ilog(vf->num_books));
1042 if ( book_idx >= vf->num_books ) {
1043 av_log( vc->avccontext, AV_LOG_ERROR,
1044 "floor0 dec: booknumber too high!\n" );
e14356c8 1045 book_idx= 0;
07c55d8e
AJ
1046 //FIXME: look above
1047 }
1048 AV_DEBUG( "floor0 dec: booknumber: %u\n", book_idx );
1049 codebook=vc->codebooks[vf->book_list[book_idx]];
1050
1051 while (lsp_len<vf->order) {
1052 int vec_off;
1053
1054 AV_DEBUG( "floor0 dec: book dimension: %d\n", codebook.dimensions );
1055 AV_DEBUG( "floor0 dec: maximum depth: %d\n", codebook.maxdepth );
1056 /* read temp vector */
1057 vec_off=get_vlc2(&vc->gb,
1058 codebook.vlc.table,
1059 codebook.nb_bits,
1060 codebook.maxdepth ) *
1061 codebook.dimensions;
1062 AV_DEBUG( "floor0 dec: vector offset: %d\n", vec_off );
1063 /* copy each vector component and add last to it */
1064 for (idx=0; idx<codebook.dimensions; ++idx) {
1065 lsp[lsp_len+idx]=codebook.codevectors[vec_off+idx]+last;
1066 }
1067 last=lsp[lsp_len+idx-1]; /* set last to last vector component */
1068
1069 lsp_len += codebook.dimensions;
1070 }
1071#ifdef V_DEBUG
1072 /* DEBUG: output lsp coeffs */
1073 {
1074 int idx;
1075 for ( idx = 0; idx < lsp_len; ++idx )
1076 AV_DEBUG("floor0 dec: coeff at %d is %f\n", idx, lsp[idx] );
1077 }
1078#endif
1079
1080 /* synthesize floor output vector */
1081 {
1082 int i;
1083 int order=vf->order;
1084 float wstep=M_PI/vf->bark_map_size;
1085
1086 for(i=0;i<order;i++) { lsp[i]=2.0f*cos(lsp[i]); }
1087
1088 AV_DEBUG("floor0 synth: map_size=%d; m=%d; wstep=%f\n",
1089 vf->map_size, order, wstep);
1090
1091 i=0;
1092 while(i<vf->map_size[blockflag]) {
1093 int j, iter_cond=vf->map[blockflag][i];
1094 float p=0.5f;
1095 float q=0.5f;
1096 float two_cos_w=2.0f*cos(wstep*iter_cond); // needed all times
1097
1098 /* similar part for the q and p products */
460c0abf 1099 for(j=0;j+1<order;j+=2) {
07c55d8e
AJ
1100 q *= lsp[j] -two_cos_w;
1101 p *= lsp[j+1]-two_cos_w;
1102 }
1103 if(j==order) { // even order
1104 p *= p*(2.0f-two_cos_w);
1105 q *= q*(2.0f+two_cos_w);
1106 }
1107 else { // odd order
1108 q *= two_cos_w-lsp[j]; // one more time for q
1109
1110 /* final step and square */
1111 p *= p*(4.f-two_cos_w*two_cos_w);
1112 q *= q;
1113 }
1114
1115 /* calculate linear floor value */
1116 {
1117 q=exp( (
1118 ( (amplitude*vf->amplitude_offset)/
1119 (((1<<vf->amplitude_bits)-1) * sqrt(p+q)) )
1120 - vf->amplitude_offset ) * .11512925f
1121 );
1122 }
1123
1124 /* fill vector */
1125 do { vec[i]=q; ++i; }while(vf->map[blockflag][i]==iter_cond);
1126 }
1127 }
1128 }
1129 else {
1130 /* this channel is unused */
1131 return 1;
1132 }
1133
1134 AV_DEBUG(" Floor0 decoded\n");
1135
1136 return 0;
1137}
1138
1139static uint_fast8_t vorbis_floor1_decode(vorbis_context *vc, vorbis_floor_data *vfu, float *vec) {
1140 vorbis_floor1 * vf=&vfu->t1;
1141 GetBitContext *gb=&vc->gb;
1142 uint_fast16_t range_v[4]={ 256, 128, 86, 64 };
1143 uint_fast16_t range=range_v[vf->multiplier-1];
1144 uint_fast16_t floor1_Y[vf->x_list_dim];
1145 uint_fast16_t floor1_Y_final[vf->x_list_dim];
1146 int floor1_flag[vf->x_list_dim];
1147 uint_fast8_t class_;
1148 uint_fast8_t cdim;
1149 uint_fast8_t cbits;
1150 uint_fast8_t csub;
1151 uint_fast8_t cval;
1152 int_fast16_t book;
1153 uint_fast16_t offset;
1154 uint_fast16_t i,j;
1155 /*u*/int_fast16_t adx, ady, off, predicted; // WTF ? dy/adx= (unsigned)dy/adx ?
1156 int_fast16_t dy, err;
1157
1158
1159 if (!get_bits1(gb)) return 1; // silence
1160
1161// Read values (or differences) for the floor's points
1162
1163 floor1_Y[0]=get_bits(gb, ilog(range-1));
1164 floor1_Y[1]=get_bits(gb, ilog(range-1));
1165
1166 AV_DEBUG("floor 0 Y %d floor 1 Y %d \n", floor1_Y[0], floor1_Y[1]);
1167
1168 offset=2;
1169 for(i=0;i<vf->partitions;++i) {
1170 class_=vf->partition_class[i];
1171 cdim=vf->class_dimensions[class_];
1172 cbits=vf->class_subclasses[class_];
1173 csub=(1<<cbits)-1;
1174 cval=0;
1175
1176 AV_DEBUG("Cbits %d \n", cbits);
1177
1178 if (cbits) { // this reads all subclasses for this partition's class
1179 cval=get_vlc2(gb, vc->codebooks[vf->class_masterbook[class_]].vlc.table,
1180 vc->codebooks[vf->class_masterbook[class_]].nb_bits, 3);
1181 }
1182
1183 for(j=0;j<cdim;++j) {
1184 book=vf->subclass_books[class_][cval & csub];
1185
1186 AV_DEBUG("book %d Cbits %d cval %d bits:%d \n", book, cbits, cval, get_bits_count(gb));
1187
1188 cval=cval>>cbits;
1189 if (book>-1) {
1190 floor1_Y[offset+j]=get_vlc2(gb, vc->codebooks[book].vlc.table,
1191 vc->codebooks[book].nb_bits, 3);
1192 } else {
1193 floor1_Y[offset+j]=0;
1194 }
1195
1196 AV_DEBUG(" floor(%d) = %d \n", vf->list[offset+j].x, floor1_Y[offset+j]);
1197 }
1198 offset+=cdim;
1199 }
1200
1201// Amplitude calculation from the differences
1202
1203 floor1_flag[0]=1;
1204 floor1_flag[1]=1;
1205 floor1_Y_final[0]=floor1_Y[0];
1206 floor1_Y_final[1]=floor1_Y[1];
1207
1208 for(i=2;i<vf->x_list_dim;++i) {
1209 uint_fast16_t val, highroom, lowroom, room;
1210 uint_fast16_t high_neigh_offs;
1211 uint_fast16_t low_neigh_offs;
1212
1213 low_neigh_offs=vf->list[i].low;
1214 high_neigh_offs=vf->list[i].high;
1215 dy=floor1_Y_final[high_neigh_offs]-floor1_Y_final[low_neigh_offs]; // render_point begin
1216 adx=vf->list[high_neigh_offs].x-vf->list[low_neigh_offs].x;
1217 ady= FFABS(dy);
1218 err=ady*(vf->list[i].x-vf->list[low_neigh_offs].x);
1219 off=(int16_t)err/(int16_t)adx;
1220 if (dy<0) {
1221 predicted=floor1_Y_final[low_neigh_offs]-off;
1222 } else {
1223 predicted=floor1_Y_final[low_neigh_offs]+off;
1224 } // render_point end
1225
1226 val=floor1_Y[i];
1227 highroom=range-predicted;
1228 lowroom=predicted;
1229 if (highroom < lowroom) {
1230 room=highroom*2;
1231 } else {
1232 room=lowroom*2; // SPEC mispelling
1233 }
1234 if (val) {
1235 floor1_flag[low_neigh_offs]=1;
1236 floor1_flag[high_neigh_offs]=1;
1237 floor1_flag[i]=1;
1238 if (val>=room) {
1239 if (highroom > lowroom) {
1240 floor1_Y_final[i]=val-lowroom+predicted;
1241 } else {
1242 floor1_Y_final[i]=predicted-val+highroom-1;
1243 }
1244 } else {
1245 if (val & 1) {
1246 floor1_Y_final[i]=predicted-(val+1)/2;
1247 } else {
1248 floor1_Y_final[i]=predicted+val/2;
1249 }
1250 }
1251 } else {
1252 floor1_flag[i]=0;
1253 floor1_Y_final[i]=predicted;
1254 }
1255
1256 AV_DEBUG(" Decoded floor(%d) = %d / val %d \n", vf->list[i].x, floor1_Y_final[i], val);
1257 }
1258
1259// Curve synth - connect the calculated dots and convert from dB scale FIXME optimize ?
1260
1261 ff_vorbis_floor1_render_list(vf->list, vf->x_list_dim, floor1_Y_final, floor1_flag, vf->multiplier, vec, vf->list[1].x);
1262
1263 AV_DEBUG(" Floor decoded\n");
1264
1265 return 0;
1266}
1267
1268// Read and decode residue
1269
c541e668 1270static av_always_inline int vorbis_residue_decode_internal(vorbis_context *vc, vorbis_residue *vr, uint_fast8_t ch, uint_fast8_t *do_not_decode, float *vec, uint_fast16_t vlen, int vr_type) {
07c55d8e
AJ
1271 GetBitContext *gb=&vc->gb;
1272 uint_fast8_t c_p_c=vc->codebooks[vr->classbook].dimensions;
1273 uint_fast16_t n_to_read=vr->end-vr->begin;
1274 uint_fast16_t ptns_to_read=n_to_read/vr->partition_size;
1275 uint_fast8_t classifs[ptns_to_read*vc->audio_channels];
1276 uint_fast8_t pass;
1277 uint_fast8_t ch_used;
1278 uint_fast8_t i,j,l;
1279 uint_fast16_t k;
1280
c541e668 1281 if (vr_type==2) {
07c55d8e
AJ
1282 for(j=1;j<ch;++j) {
1283 do_not_decode[0]&=do_not_decode[j]; // FIXME - clobbering input
1284 }
1285 if (do_not_decode[0]) return 0;
1286 ch_used=1;
1287 } else {
1288 ch_used=ch;
1289 }
1290
1291 AV_DEBUG(" residue type 0/1/2 decode begin, ch: %d cpc %d \n", ch, c_p_c);
1292
1293 for(pass=0;pass<=vr->maxpass;++pass) { // FIXME OPTIMIZE?
1294 uint_fast16_t voffset;
1295 uint_fast16_t partition_count;
1296 uint_fast16_t j_times_ptns_to_read;
1297
1298 voffset=vr->begin;
1299 for(partition_count=0;partition_count<ptns_to_read;) { // SPEC error
1300 if (!pass) {
1301 uint_fast32_t inverse_class = ff_inverse[vr->classifications];
1302 for(j_times_ptns_to_read=0, j=0;j<ch_used;++j) {
1303 if (!do_not_decode[j]) {
1304 uint_fast32_t temp=get_vlc2(gb, vc->codebooks[vr->classbook].vlc.table,
1305 vc->codebooks[vr->classbook].nb_bits, 3);
1306
1307 AV_DEBUG("Classword: %d \n", temp);
1308
1309 assert(vr->classifications > 1 && temp<=65536); //needed for inverse[]
1310 for(i=0;i<c_p_c;++i) {
1311 uint_fast32_t temp2;
1312
1313 temp2=(((uint_fast64_t)temp) * inverse_class)>>32;
1314 if (partition_count+c_p_c-1-i < ptns_to_read) {
1315 classifs[j_times_ptns_to_read+partition_count+c_p_c-1-i]=temp-temp2*vr->classifications;
1316 }
1317 temp=temp2;
1318 }
1319 }
1320 j_times_ptns_to_read+=ptns_to_read;
1321 }
1322 }
1323 for(i=0;(i<c_p_c) && (partition_count<ptns_to_read);++i) {
1324 for(j_times_ptns_to_read=0, j=0;j<ch_used;++j) {
1325 uint_fast16_t voffs;
1326
1327 if (!do_not_decode[j]) {
1328 uint_fast8_t vqclass=classifs[j_times_ptns_to_read+partition_count];
1329 int_fast16_t vqbook=vr->books[vqclass][pass];
1330
975741e7 1331 if (vqbook>=0 && vc->codebooks[vqbook].codevectors) {
07c55d8e
AJ
1332 uint_fast16_t coffs;
1333 unsigned dim= vc->codebooks[vqbook].dimensions; // not uint_fast8_t: 64bit is slower here on amd64
1334 uint_fast16_t step= dim==1 ? vr->partition_size
1335 : FASTDIV(vr->partition_size, dim);
1336 vorbis_codebook codebook= vc->codebooks[vqbook];
1337
c541e668 1338 if (vr_type==0) {
07c55d8e
AJ
1339
1340 voffs=voffset+j*vlen;
1341 for(k=0;k<step;++k) {
1342 coffs=get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * dim;
1343 for(l=0;l<dim;++l) {
1344 vec[voffs+k+l*step]+=codebook.codevectors[coffs+l]; // FPMATH
1345 }
1346 }
1347 }
c541e668 1348 else if (vr_type==1) {
07c55d8e
AJ
1349 voffs=voffset+j*vlen;
1350 for(k=0;k<step;++k) {
1351 coffs=get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * dim;
1352 for(l=0;l<dim;++l, ++voffs) {
1353 vec[voffs]+=codebook.codevectors[coffs+l]; // FPMATH
1354
1355 AV_DEBUG(" pass %d offs: %d curr: %f change: %f cv offs.: %d \n", pass, voffs, vec[voffs], codebook.codevectors[coffs+l], coffs);
1356 }
1357 }
1358 }
c541e668 1359 else if (vr_type==2 && ch==2 && (voffset&1)==0 && (dim&1)==0) { // most frequent case optimized
07c55d8e
AJ
1360 voffs=voffset>>1;
1361
1362 if(dim==2) {
1363 for(k=0;k<step;++k) {
1364 coffs=get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * 2;
1365 vec[voffs+k ]+=codebook.codevectors[coffs ]; // FPMATH
1366 vec[voffs+k+vlen]+=codebook.codevectors[coffs+1]; // FPMATH
1367 }
1a325367
LM
1368 } else if(dim==4) {
1369 for(k=0;k<step;++k, voffs+=2) {
1370 coffs=get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * 4;
1371 vec[voffs ]+=codebook.codevectors[coffs ]; // FPMATH
1372 vec[voffs+1 ]+=codebook.codevectors[coffs+2]; // FPMATH
1373 vec[voffs+vlen ]+=codebook.codevectors[coffs+1]; // FPMATH
1374 vec[voffs+vlen+1]+=codebook.codevectors[coffs+3]; // FPMATH
1375 }
07c55d8e
AJ
1376 } else
1377 for(k=0;k<step;++k) {
1378 coffs=get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * dim;
1379 for(l=0;l<dim;l+=2, voffs++) {
1380 vec[voffs ]+=codebook.codevectors[coffs+l ]; // FPMATH
1381 vec[voffs+vlen]+=codebook.codevectors[coffs+l+1]; // FPMATH
1382
1383 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);
1384 }
1385 }
1386
1387 }
c541e668 1388 else if (vr_type==2) {
07c55d8e
AJ
1389 voffs=voffset;
1390
1391 for(k=0;k<step;++k) {
1392 coffs=get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * dim;
1393 for(l=0;l<dim;++l, ++voffs) {
1394 vec[voffs/ch+(voffs%ch)*vlen]+=codebook.codevectors[coffs+l]; // FPMATH FIXME use if and counter instead of / and %
1395
1396 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);
1397 }
1398 }
07c55d8e
AJ
1399 }
1400 }
1401 }
1402 j_times_ptns_to_read+=ptns_to_read;
1403 }
1404 ++partition_count;
1405 voffset+=vr->partition_size;
1406 }
1407 }
1408 }
1409 return 0;
1410}
1411
c541e668
MN
1412static inline 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)
1413{
1414 if (vr->type==2)
1415 return vorbis_residue_decode_internal(vc, vr, ch, do_not_decode, vec, vlen, 2);
1416 else if (vr->type==1)
1417 return vorbis_residue_decode_internal(vc, vr, ch, do_not_decode, vec, vlen, 1);
1418 else if (vr->type==0)
1419 return vorbis_residue_decode_internal(vc, vr, ch, do_not_decode, vec, vlen, 0);
1420 else {
1421 av_log(vc->avccontext, AV_LOG_ERROR, " Invalid residue type while residue decode?! \n");
0a01efd0 1422 return -1;
c541e668
MN
1423 }
1424}
1425
07c55d8e
AJ
1426void vorbis_inverse_coupling(float *mag, float *ang, int blocksize)
1427{
1428 int i;
1429 for(i=0; i<blocksize; i++)
1430 {
1431 if (mag[i]>0.0) {
1432 if (ang[i]>0.0) {
1433 ang[i]=mag[i]-ang[i];
1434 } else {
1435 float temp=ang[i];
1436 ang[i]=mag[i];
1437 mag[i]+=temp;
1438 }
1439 } else {
1440 if (ang[i]>0.0) {
1441 ang[i]+=mag[i];
1442 } else {
1443 float temp=ang[i];
1444 ang[i]=mag[i];
1445 mag[i]-=temp;
1446 }
1447 }
1448 }
1449}
1450
f27e1d64
LM
1451static void copy_normalize(float *dst, float *src, int len, int exp_bias, float add_bias)
1452{
1453 int i;
1454 if(exp_bias) {
37317794 1455 memcpy(dst, src, len * sizeof(float));
f27e1d64
LM
1456 } else {
1457 for(i=0; i<len; i++)
1458 dst[i] = src[i] + add_bias;
1459 }
1460}
1461
07c55d8e
AJ
1462// Decode the audio packet using the functions above
1463
1464static int vorbis_parse_audio_packet(vorbis_context *vc) {
1465 GetBitContext *gb=&vc->gb;
1466
f27e1d64 1467 uint_fast8_t previous_window=vc->previous_window;
07c55d8e 1468 uint_fast8_t mode_number;
f27e1d64 1469 uint_fast8_t blockflag;
07c55d8e 1470 uint_fast16_t blocksize;
9d2b5cf2 1471 int_fast32_t i,j;
07c55d8e
AJ
1472 uint_fast8_t no_residue[vc->audio_channels];
1473 uint_fast8_t do_not_decode[vc->audio_channels];
1474 vorbis_mapping *mapping;
1475 float *ch_res_ptr=vc->channel_residues;
1476 float *ch_floor_ptr=vc->channel_floors;
1477 uint_fast8_t res_chan[vc->audio_channels];
1478 uint_fast8_t res_num=0;
1479 int_fast16_t retlen=0;
07c55d8e
AJ
1480 float fadd_bias = vc->add_bias;
1481
1482 if (get_bits1(gb)) {
1483 av_log(vc->avccontext, AV_LOG_ERROR, "Not a Vorbis I audio packet.\n");
1484 return -1; // packet type not audio
1485 }
1486
1487 if (vc->mode_count==1) {
1488 mode_number=0;
1489 } else {
1490 mode_number=get_bits(gb, ilog(vc->mode_count-1));
1491 }
e5b0cfb5
GC
1492 if (mode_number>=vc->mode_count) {
1493 av_log(vc->avccontext, AV_LOG_ERROR, "mode number %d out of range.\n", mode_number);
1494 return -1;
1495 }
07c55d8e
AJ
1496 vc->mode_number=mode_number;
1497 mapping=&vc->mappings[vc->modes[mode_number].mapping];
1498
1499 AV_DEBUG(" Mode number: %d , mapping: %d , blocktype %d \n", mode_number, vc->modes[mode_number].mapping, vc->modes[mode_number].blockflag);
1500
f27e1d64
LM
1501 blockflag=vc->modes[mode_number].blockflag;
1502 blocksize=vc->blocksize[blockflag];
1503 if (blockflag) {
1504 skip_bits(gb, 2); // previous_window, next_window
07c55d8e
AJ
1505 }
1506
07c55d8e
AJ
1507 memset(ch_res_ptr, 0, sizeof(float)*vc->audio_channels*blocksize/2); //FIXME can this be removed ?
1508 memset(ch_floor_ptr, 0, sizeof(float)*vc->audio_channels*blocksize/2); //FIXME can this be removed ?
1509
1510// Decode floor
1511
1512 for(i=0;i<vc->audio_channels;++i) {
1513 vorbis_floor *floor;
1514 if (mapping->submaps>1) {
1515 floor=&vc->floors[mapping->submap_floor[mapping->mux[i]]];
1516 } else {
1517 floor=&vc->floors[mapping->submap_floor[0]];
1518 }
1519
1520 no_residue[i]=floor->decode(vc, &floor->data, ch_floor_ptr);
1521 ch_floor_ptr+=blocksize/2;
1522 }
1523
1524// Nonzero vector propagate
1525
1526 for(i=mapping->coupling_steps-1;i>=0;--i) {
1527 if (!(no_residue[mapping->magnitude[i]] & no_residue[mapping->angle[i]])) {
1528 no_residue[mapping->magnitude[i]]=0;
1529 no_residue[mapping->angle[i]]=0;
1530 }
1531 }
1532
1533// Decode residue
1534
1535 for(i=0;i<mapping->submaps;++i) {
1536 vorbis_residue *residue;
1537 uint_fast8_t ch=0;
1538
1539 for(j=0;j<vc->audio_channels;++j) {
08c8742c 1540 if ((mapping->submaps==1) || (i==mapping->mux[j])) {
07c55d8e
AJ
1541 res_chan[j]=res_num;
1542 if (no_residue[j]) {
1543 do_not_decode[ch]=1;
1544 } else {
1545 do_not_decode[ch]=0;
1546 }
1547 ++ch;
1548 ++res_num;
1549 }
1550 }
1551 residue=&vc->residues[mapping->submap_residue[i]];
1552 vorbis_residue_decode(vc, residue, ch, do_not_decode, ch_res_ptr, blocksize/2);
1553
1554 ch_res_ptr+=ch*blocksize/2;
1555 }
1556
1557// Inverse coupling
1558
1559 for(i=mapping->coupling_steps-1;i>=0;--i) { //warning: i has to be signed
1560 float *mag, *ang;
1561
1562 mag=vc->channel_residues+res_chan[mapping->magnitude[i]]*blocksize/2;
1563 ang=vc->channel_residues+res_chan[mapping->angle[i]]*blocksize/2;
1564 vc->dsp.vorbis_inverse_coupling(mag, ang, blocksize/2);
1565 }
1566
9d2b5cf2 1567// Dotproduct, MDCT
07c55d8e 1568
9d2b5cf2
SS
1569 for(j=vc->audio_channels-1;j>=0;j--) {
1570 ch_floor_ptr=vc->channel_floors+j*blocksize/2;
07c55d8e
AJ
1571 ch_res_ptr=vc->channel_residues+res_chan[j]*blocksize/2;
1572 vc->dsp.vector_fmul(ch_floor_ptr, ch_res_ptr, blocksize/2);
9d2b5cf2 1573 ff_imdct_half(&vc->mdct[blockflag], ch_res_ptr, ch_floor_ptr);
07c55d8e
AJ
1574 }
1575
9d2b5cf2 1576// Overlap/add, save data for next overlapping FPMATH
07c55d8e 1577
f27e1d64 1578 retlen = (blocksize + vc->blocksize[previous_window])/4;
9d2b5cf2 1579 for(j=0;j<vc->audio_channels;j++) {
f27e1d64
LM
1580 uint_fast16_t bs0=vc->blocksize[0];
1581 uint_fast16_t bs1=vc->blocksize[1];
633d9def 1582 float *residue=vc->channel_residues+res_chan[j]*blocksize/2;
b9fa3208 1583 float *saved=vc->saved+j*bs1/4;
46803f4f
LM
1584 float *ret=vc->channel_floors+j*retlen;
1585 float *buf=residue;
f27e1d64 1586 const float *win=vc->win[blockflag&previous_window];
07c55d8e 1587
f27e1d64 1588 if(blockflag == previous_window) {
b9fa3208 1589 vc->dsp.vector_fmul_window(ret, saved, buf, win, fadd_bias, blocksize/4);
f27e1d64 1590 } else if(blockflag > previous_window) {
b9fa3208
LM
1591 vc->dsp.vector_fmul_window(ret, saved, buf, win, fadd_bias, bs0/4);
1592 copy_normalize(ret+bs0/2, buf+bs0/4, (bs1-bs0)/4, vc->exp_bias, fadd_bias);
07c55d8e 1593 } else {
f27e1d64 1594 copy_normalize(ret, saved, (bs1-bs0)/4, vc->exp_bias, fadd_bias);
b9fa3208 1595 vc->dsp.vector_fmul_window(ret+(bs1-bs0)/4, saved+(bs1-bs0)/4, buf, win, fadd_bias, bs0/4);
07c55d8e 1596 }
b9fa3208 1597 memcpy(saved, buf+blocksize/4, blocksize/4*sizeof(float));
07c55d8e 1598 }
07c55d8e 1599
f27e1d64
LM
1600 vc->previous_window = blockflag;
1601 return retlen;
07c55d8e
AJ
1602}
1603
1604// Return the decoded audio packet through the standard api
1605
1606static int vorbis_decode_frame(AVCodecContext *avccontext,
1607 void *data, int *data_size,
7a00bbad 1608 AVPacket *avpkt)
07c55d8e 1609{
7a00bbad
TB
1610 const uint8_t *buf = avpkt->data;
1611 int buf_size = avpkt->size;
07c55d8e
AJ
1612 vorbis_context *vc = avccontext->priv_data ;
1613 GetBitContext *gb = &(vc->gb);
5eb0f2a4
LM
1614 const float *channel_ptrs[vc->audio_channels];
1615 int i;
07c55d8e
AJ
1616
1617 int_fast16_t len;
1618
1619 if(!buf_size){
1620 return 0;
1621 }
1622
1623 AV_DEBUG("packet length %d \n", buf_size);
1624
1625 init_get_bits(gb, buf, buf_size*8);
1626
1627 len=vorbis_parse_audio_packet(vc);
1628
1629 if (len<=0) {
1630 *data_size=0;
1631 return buf_size;
1632 }
1633
1634 if (!vc->first_frame) {
1635 vc->first_frame=1;
1636 *data_size=0;
1637 return buf_size ;
1638 }
1639
1640 AV_DEBUG("parsed %d bytes %d bits, returned %d samples (*ch*bits) \n", get_bits_count(gb)/8, get_bits_count(gb)%8, len);
1641
5eb0f2a4 1642 for(i=0; i<vc->audio_channels; i++)
46803f4f 1643 channel_ptrs[i] = vc->channel_floors+i*len;
5eb0f2a4 1644 vc->dsp.float_to_int16_interleave(data, channel_ptrs, len, vc->audio_channels);
f27e1d64 1645 *data_size=len*2*vc->audio_channels;
07c55d8e
AJ
1646
1647 return buf_size ;
1648}
1649
1650// Close decoder
1651
98a6fff9 1652static av_cold int vorbis_decode_close(AVCodecContext *avccontext) {
07c55d8e
AJ
1653 vorbis_context *vc = avccontext->priv_data;
1654
1655 vorbis_free(vc);
1656
1657 return 0 ;
1658}
1659
1660AVCodec vorbis_decoder = {
1661 "vorbis",
1662 CODEC_TYPE_AUDIO,
1663 CODEC_ID_VORBIS,
1664 sizeof(vorbis_context),
1665 vorbis_decode_init,
1666 NULL,
1667 vorbis_decode_close,
1668 vorbis_decode_frame,
fe4bf374 1669 .long_name = NULL_IF_CONFIG_SMALL("Vorbis"),
07c55d8e
AJ
1670};
1671