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ffmpeg / libavcodec / vorbis_dec.c @ 7d485f16

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1
/**
2
 * @file libavcodec/vorbis_dec.c
3
 * Vorbis I decoder
4
 * @author Denes Balatoni  ( dbalatoni programozo hu )
5

6
 * This file is part of FFmpeg.
7
 *
8
 * FFmpeg is free software; you can redistribute it and/or
9
 * modify it under the terms of the GNU Lesser General Public
10
 * License as published by the Free Software Foundation; either
11
 * version 2.1 of the License, or (at your option) any later version.
12
 *
13
 * FFmpeg is distributed in the hope that it will be useful,
14
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
16
 * Lesser General Public License for more details.
17
 *
18
 * You should have received a copy of the GNU Lesser General Public
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 * License along with FFmpeg; if not, write to the Free Software
20
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21
 */
22

    
23
#undef V_DEBUG
24
//#define V_DEBUG
25
//#define AV_DEBUG(...) av_log(NULL, AV_LOG_INFO, __VA_ARGS__)
26

    
27
#include <math.h>
28

    
29
#define ALT_BITSTREAM_READER_LE
30
#include "avcodec.h"
31
#include "get_bits.h"
32
#include "dsputil.h"
33

    
34
#include "vorbis.h"
35
#include "xiph.h"
36

    
37
#define V_NB_BITS 8
38
#define V_NB_BITS2 11
39
#define V_MAX_VLCS (1<<16)
40

    
41
#ifndef V_DEBUG
42
#define AV_DEBUG(...)
43
#endif
44

    
45
#undef NDEBUG
46
#include <assert.h>
47

    
48
typedef struct {
49
    uint_fast8_t dimensions;
50
    uint_fast8_t lookup_type;
51
    uint_fast8_t maxdepth;
52
    VLC vlc;
53
    float *codevectors;
54
    unsigned int nb_bits;
55
} vorbis_codebook;
56

    
57
typedef union vorbis_floor_u vorbis_floor_data;
58
typedef struct vorbis_floor0_s vorbis_floor0;
59
typedef struct vorbis_floor1_s vorbis_floor1;
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struct vorbis_context_s;
61
typedef
62
uint_fast8_t (* vorbis_floor_decode_func)
63
             (struct vorbis_context_s *, vorbis_floor_data *, float *);
64
typedef struct {
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    uint_fast8_t floor_type;
66
    vorbis_floor_decode_func decode;
67
    union vorbis_floor_u
68
    {
69
        struct vorbis_floor0_s
70
        {
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            uint_fast8_t order;
72
            uint_fast16_t rate;
73
            uint_fast16_t bark_map_size;
74
            int_fast32_t * map[2];
75
            uint_fast32_t map_size[2];
76
            uint_fast8_t amplitude_bits;
77
            uint_fast8_t amplitude_offset;
78
            uint_fast8_t num_books;
79
            uint_fast8_t * book_list;
80
            float * lsp;
81
        } t0;
82
        struct vorbis_floor1_s
83
        {
84
            uint_fast8_t partitions;
85
            uint_fast8_t maximum_class;
86
            uint_fast8_t partition_class[32];
87
            uint_fast8_t class_dimensions[16];
88
            uint_fast8_t class_subclasses[16];
89
            uint_fast8_t class_masterbook[16];
90
            int_fast16_t subclass_books[16][8];
91
            uint_fast8_t multiplier;
92
            uint_fast16_t x_list_dim;
93
            vorbis_floor1_entry * list;
94
        } t1;
95
    } data;
96
} vorbis_floor;
97

    
98
typedef struct {
99
    uint_fast16_t type;
100
    uint_fast32_t begin;
101
    uint_fast32_t end;
102
    uint_fast32_t partition_size;
103
    uint_fast8_t classifications;
104
    uint_fast8_t classbook;
105
    int_fast16_t books[64][8];
106
    uint_fast8_t maxpass;
107
} vorbis_residue;
108

    
109
typedef struct {
110
    uint_fast8_t submaps;
111
    uint_fast16_t coupling_steps;
112
    uint_fast8_t *magnitude;
113
    uint_fast8_t *angle;
114
    uint_fast8_t *mux;
115
    uint_fast8_t submap_floor[16];
116
    uint_fast8_t submap_residue[16];
117
} vorbis_mapping;
118

    
119
typedef struct {
120
    uint_fast8_t blockflag;
121
    uint_fast16_t windowtype;
122
    uint_fast16_t transformtype;
123
    uint_fast8_t mapping;
124
} vorbis_mode;
125

    
126
typedef struct vorbis_context_s {
127
    AVCodecContext *avccontext;
128
    GetBitContext gb;
129
    DSPContext dsp;
130

    
131
    MDCTContext mdct[2];
132
    uint_fast8_t first_frame;
133
    uint_fast32_t version;
134
    uint_fast8_t audio_channels;
135
    uint_fast32_t audio_samplerate;
136
    uint_fast32_t bitrate_maximum;
137
    uint_fast32_t bitrate_nominal;
138
    uint_fast32_t bitrate_minimum;
139
    uint_fast32_t blocksize[2];
140
    const float * win[2];
141
    uint_fast16_t codebook_count;
142
    vorbis_codebook *codebooks;
143
    uint_fast8_t floor_count;
144
    vorbis_floor *floors;
145
    uint_fast8_t residue_count;
146
    vorbis_residue *residues;
147
    uint_fast8_t mapping_count;
148
    vorbis_mapping *mappings;
149
    uint_fast8_t mode_count;
150
    vorbis_mode *modes;
151
    uint_fast8_t mode_number; // mode number for the current packet
152
    uint_fast8_t previous_window;
153
    float *channel_residues;
154
    float *channel_floors;
155
    float *saved;
156
    uint_fast32_t add_bias; // for float->int conversion
157
    uint_fast32_t exp_bias;
158
} vorbis_context;
159

    
160
/* Helper functions */
161

    
162
#define BARK(x) \
163
    (13.1f*atan(0.00074f*(x))+2.24f*atan(1.85e-8f*(x)*(x))+1e-4f*(x))
164

    
165
static float vorbisfloat2float(uint_fast32_t val) {
166
    double mant=val&0x1fffff;
167
    long exp=(val&0x7fe00000L)>>21;
168
    if (val&0x80000000) mant=-mant;
169
    return ldexp(mant, exp - 20 - 768);
170
}
171

    
172

    
173
// Free all allocated memory -----------------------------------------
174

    
175
static void vorbis_free(vorbis_context *vc) {
176
    int_fast16_t i;
177

    
178
    av_freep(&vc->channel_residues);
179
    av_freep(&vc->channel_floors);
180
    av_freep(&vc->saved);
181

    
182
    av_freep(&vc->residues);
183
    av_freep(&vc->modes);
184

    
185
    ff_mdct_end(&vc->mdct[0]);
186
    ff_mdct_end(&vc->mdct[1]);
187

    
188
    for(i=0;i<vc->codebook_count;++i) {
189
        av_free(vc->codebooks[i].codevectors);
190
        free_vlc(&vc->codebooks[i].vlc);
191
    }
192
    av_freep(&vc->codebooks);
193

    
194
    for(i=0;i<vc->floor_count;++i) {
195
        if(vc->floors[i].floor_type==0) {
196
            av_free(vc->floors[i].data.t0.map[0]);
197
            av_free(vc->floors[i].data.t0.map[1]);
198
            av_free(vc->floors[i].data.t0.book_list);
199
            av_free(vc->floors[i].data.t0.lsp);
200
        }
201
        else {
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);
213

    
214
    if(vc->exp_bias){
215
        av_freep(&vc->win[0]);
216
        av_freep(&vc->win[1]);
217
    }
218
}
219

    
220
// Parse setup header -------------------------------------------------
221

    
222
// Process codebooks part
223

    
224
static int vorbis_parse_setup_hdr_codebooks(vorbis_context *vc) {
225
    uint_fast16_t cb;
226
    uint8_t *tmp_vlc_bits;
227
    uint32_t *tmp_vlc_codes;
228
    GetBitContext *gb=&vc->gb;
229

    
230
    vc->codebook_count=get_bits(gb,8)+1;
231

    
232
    AV_DEBUG(" Codebooks: %d \n", vc->codebook_count);
233

    
234
    vc->codebooks=av_mallocz(vc->codebook_count * sizeof(vorbis_codebook));
235
    tmp_vlc_bits =av_mallocz(V_MAX_VLCS * sizeof(uint8_t));
236
    tmp_vlc_codes=av_mallocz(V_MAX_VLCS * sizeof(uint32_t));
237

    
238
    for(cb=0;cb<vc->codebook_count;++cb) {
239
        vorbis_codebook *codebook_setup=&vc->codebooks[cb];
240
        uint_fast8_t ordered;
241
        uint_fast32_t t, used_entries=0;
242
        uint_fast32_t entries;
243

    
244
        AV_DEBUG(" %d. Codebook \n", cb);
245

    
246
        if (get_bits(gb, 24)!=0x564342) {
247
            av_log(vc->avccontext, AV_LOG_ERROR, " %"PRIdFAST16". Codebook setup data corrupt. \n", cb);
248
            goto error;
249
        }
250

    
251
        codebook_setup->dimensions=get_bits(gb, 16);
252
        if (codebook_setup->dimensions>16) {
253
            av_log(vc->avccontext, AV_LOG_ERROR, " %"PRIdFAST16". Codebook's dimension is too large (%d). \n", cb, codebook_setup->dimensions);
254
            goto error;
255
        }
256
        entries=get_bits(gb, 24);
257
        if (entries>V_MAX_VLCS) {
258
            av_log(vc->avccontext, AV_LOG_ERROR, " %"PRIdFAST16". Codebook has too many entries (%"PRIdFAST32"). \n", cb, entries);
259
            goto error;
260
        }
261

    
262
        ordered=get_bits1(gb);
263

    
264
        AV_DEBUG(" codebook_dimensions %d, codebook_entries %d \n", codebook_setup->dimensions, entries);
265

    
266
        if (!ordered) {
267
            uint_fast16_t ce;
268
            uint_fast8_t flag;
269
            uint_fast8_t sparse=get_bits1(gb);
270

    
271
            AV_DEBUG(" not ordered \n");
272

    
273
            if (sparse) {
274
                AV_DEBUG(" sparse \n");
275

    
276
                used_entries=0;
277
                for(ce=0;ce<entries;++ce) {
278
                    flag=get_bits1(gb);
279
                    if (flag) {
280
                        tmp_vlc_bits[ce]=get_bits(gb, 5)+1;
281
                        ++used_entries;
282
                    }
283
                    else tmp_vlc_bits[ce]=0;
284
                }
285
            } else {
286
                AV_DEBUG(" not sparse \n");
287

    
288
                used_entries=entries;
289
                for(ce=0;ce<entries;++ce) {
290
                    tmp_vlc_bits[ce]=get_bits(gb, 5)+1;
291
                }
292
            }
293
        } else {
294
            uint_fast16_t current_entry=0;
295
            uint_fast8_t current_length=get_bits(gb, 5)+1;
296

    
297
            AV_DEBUG(" ordered, current length: %d \n", current_length);  //FIXME
298

    
299
            used_entries=entries;
300
            for(;current_entry<used_entries;++current_length) {
301
                uint_fast16_t i, number;
302

    
303
                AV_DEBUG(" number bits: %d ", ilog(entries - current_entry));
304

    
305
                number=get_bits(gb, ilog(entries - current_entry));
306

    
307
                AV_DEBUG(" number: %d \n", number);
308

    
309
                for(i=current_entry;i<number+current_entry;++i) {
310
                    if (i<used_entries) tmp_vlc_bits[i]=current_length;
311
                }
312

    
313
                current_entry+=number;
314
            }
315
            if (current_entry>used_entries) {
316
                av_log(vc->avccontext, AV_LOG_ERROR, " More codelengths than codes in codebook. \n");
317
                goto error;
318
            }
319
        }
320

    
321
        codebook_setup->lookup_type=get_bits(gb, 4);
322

    
323
        AV_DEBUG(" lookup type: %d : %s \n", codebook_setup->lookup_type, codebook_setup->lookup_type ? "vq" : "no lookup" );
324

    
325
// If the codebook is used for (inverse) VQ, calculate codevectors.
326

    
327
        if (codebook_setup->lookup_type==1) {
328
            uint_fast16_t i, j, k;
329
            uint_fast16_t codebook_lookup_values=ff_vorbis_nth_root(entries, codebook_setup->dimensions);
330
            uint_fast16_t codebook_multiplicands[codebook_lookup_values];
331

    
332
            float codebook_minimum_value=vorbisfloat2float(get_bits_long(gb, 32));
333
            float codebook_delta_value=vorbisfloat2float(get_bits_long(gb, 32));
334
            uint_fast8_t codebook_value_bits=get_bits(gb, 4)+1;
335
            uint_fast8_t codebook_sequence_p=get_bits1(gb);
336

    
337
            AV_DEBUG(" We expect %d numbers for building the codevectors. \n", codebook_lookup_values);
338
            AV_DEBUG("  delta %f minmum %f \n", codebook_delta_value, codebook_minimum_value);
339

    
340
            for(i=0;i<codebook_lookup_values;++i) {
341
                codebook_multiplicands[i]=get_bits(gb, codebook_value_bits);
342

    
343
                AV_DEBUG(" multiplicands*delta+minmum : %e \n", (float)codebook_multiplicands[i]*codebook_delta_value+codebook_minimum_value);
344
                AV_DEBUG(" multiplicand %d \n", codebook_multiplicands[i]);
345
            }
346

    
347
// Weed out unused vlcs and build codevector vector
348
            codebook_setup->codevectors=used_entries ? av_mallocz(used_entries*codebook_setup->dimensions * sizeof(float)) : NULL;
349
            for(j=0, i=0;i<entries;++i) {
350
                uint_fast8_t dim=codebook_setup->dimensions;
351

    
352
                if (tmp_vlc_bits[i]) {
353
                    float last=0.0;
354
                    uint_fast32_t lookup_offset=i;
355

    
356
#ifdef V_DEBUG
357
                    av_log(vc->avccontext, AV_LOG_INFO, "Lookup offset %d ,", i);
358
#endif
359

    
360
                    for(k=0;k<dim;++k) {
361
                        uint_fast32_t multiplicand_offset = lookup_offset % codebook_lookup_values;
362
                        codebook_setup->codevectors[j*dim+k]=codebook_multiplicands[multiplicand_offset]*codebook_delta_value+codebook_minimum_value+last;
363
                        if (codebook_sequence_p) {
364
                            last=codebook_setup->codevectors[j*dim+k];
365
                        }
366
                        lookup_offset/=codebook_lookup_values;
367
                    }
368
                    tmp_vlc_bits[j]=tmp_vlc_bits[i];
369

    
370
#ifdef V_DEBUG
371
                    av_log(vc->avccontext, AV_LOG_INFO, "real lookup offset %d, vector: ", j);
372
                    for(k=0;k<dim;++k) {
373
                        av_log(vc->avccontext, AV_LOG_INFO, " %f ", codebook_setup->codevectors[j*dim+k]);
374
                    }
375
                    av_log(vc->avccontext, AV_LOG_INFO, "\n");
376
#endif
377

    
378
                    ++j;
379
                }
380
            }
381
            if (j!=used_entries) {
382
                av_log(vc->avccontext, AV_LOG_ERROR, "Bug in codevector vector building code. \n");
383
                goto error;
384
            }
385
            entries=used_entries;
386
        }
387
        else if (codebook_setup->lookup_type>=2) {
388
            av_log(vc->avccontext, AV_LOG_ERROR, "Codebook lookup type not supported. \n");
389
            goto error;
390
        }
391

    
392
// Initialize VLC table
393
        if (ff_vorbis_len2vlc(tmp_vlc_bits, tmp_vlc_codes, entries)) {
394
            av_log(vc->avccontext, AV_LOG_ERROR, " Invalid code lengths while generating vlcs. \n");
395
            goto error;
396
        }
397
        codebook_setup->maxdepth=0;
398
        for(t=0;t<entries;++t)
399
            if (tmp_vlc_bits[t]>=codebook_setup->maxdepth) codebook_setup->maxdepth=tmp_vlc_bits[t];
400

    
401
        if(codebook_setup->maxdepth > 3*V_NB_BITS) codebook_setup->nb_bits=V_NB_BITS2;
402
        else                                       codebook_setup->nb_bits=V_NB_BITS;
403

    
404
        codebook_setup->maxdepth=(codebook_setup->maxdepth+codebook_setup->nb_bits-1)/codebook_setup->nb_bits;
405

    
406
        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)) {
407
            av_log(vc->avccontext, AV_LOG_ERROR, " Error generating vlc tables. \n");
408
            goto error;
409
        }
410
    }
411

    
412
    av_free(tmp_vlc_bits);
413
    av_free(tmp_vlc_codes);
414
    return 0;
415

    
416
// Error:
417
error:
418
    av_free(tmp_vlc_bits);
419
    av_free(tmp_vlc_codes);
420
    return 1;
421
}
422

    
423
// Process time domain transforms part (unused in Vorbis I)
424

    
425
static int vorbis_parse_setup_hdr_tdtransforms(vorbis_context *vc) {
426
    GetBitContext *gb=&vc->gb;
427
    uint_fast8_t i;
428
    uint_fast8_t vorbis_time_count=get_bits(gb, 6)+1;
429

    
430
    for(i=0;i<vorbis_time_count;++i) {
431
        uint_fast16_t vorbis_tdtransform=get_bits(gb, 16);
432

    
433
        AV_DEBUG(" Vorbis time domain transform %d: %d \n", vorbis_time_count, vorbis_tdtransform);
434

    
435
        if (vorbis_tdtransform) {
436
            av_log(vc->avccontext, AV_LOG_ERROR, "Vorbis time domain transform data nonzero. \n");
437
            return 1;
438
        }
439
    }
440
    return 0;
441
}
442

    
443
// Process floors part
444

    
445
static uint_fast8_t vorbis_floor0_decode(vorbis_context *vc,
446
                                         vorbis_floor_data *vfu, float *vec);
447
static void create_map( vorbis_context * vc, uint_fast8_t floor_number );
448
static uint_fast8_t vorbis_floor1_decode(vorbis_context *vc,
449
                                         vorbis_floor_data *vfu, float *vec);
450
static int vorbis_parse_setup_hdr_floors(vorbis_context *vc) {
451
    GetBitContext *gb=&vc->gb;
452
    uint_fast16_t i,j,k;
453

    
454
    vc->floor_count=get_bits(gb, 6)+1;
455

    
456
    vc->floors=av_mallocz(vc->floor_count * sizeof(vorbis_floor));
457

    
458
    for (i=0;i<vc->floor_count;++i) {
459
        vorbis_floor *floor_setup=&vc->floors[i];
460

    
461
        floor_setup->floor_type=get_bits(gb, 16);
462

    
463
        AV_DEBUG(" %d. floor type %d \n", i, floor_setup->floor_type);
464

    
465
        if (floor_setup->floor_type==1) {
466
            uint_fast8_t maximum_class=0;
467
            uint_fast8_t rangebits;
468
            uint_fast16_t floor1_values=2;
469

    
470
            floor_setup->decode=vorbis_floor1_decode;
471

    
472
            floor_setup->data.t1.partitions=get_bits(gb, 5);
473

    
474
            AV_DEBUG(" %d.floor: %d partitions \n", i, floor_setup->data.t1.partitions);
475

    
476
            for(j=0;j<floor_setup->data.t1.partitions;++j) {
477
                floor_setup->data.t1.partition_class[j]=get_bits(gb, 4);
478
                if (floor_setup->data.t1.partition_class[j]>maximum_class) maximum_class=floor_setup->data.t1.partition_class[j];
479

    
480
                AV_DEBUG(" %d. floor %d partition class %d \n", i, j, floor_setup->data.t1.partition_class[j]);
481

    
482
            }
483

    
484
            AV_DEBUG(" maximum class %d \n", maximum_class);
485

    
486
            floor_setup->data.t1.maximum_class=maximum_class;
487

    
488
            for(j=0;j<=maximum_class;++j) {
489
                floor_setup->data.t1.class_dimensions[j]=get_bits(gb, 3)+1;
490
                floor_setup->data.t1.class_subclasses[j]=get_bits(gb, 2);
491

    
492
                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]);
493

    
494
                if (floor_setup->data.t1.class_subclasses[j]) {
495
                    floor_setup->data.t1.class_masterbook[j]=get_bits(gb, 8);
496

    
497
                    AV_DEBUG("   masterbook: %d \n", floor_setup->data.t1.class_masterbook[j]);
498
                }
499

    
500
                for(k=0;k<(1<<floor_setup->data.t1.class_subclasses[j]);++k) {
501
                    floor_setup->data.t1.subclass_books[j][k]=(int16_t)get_bits(gb, 8)-1;
502

    
503
                    AV_DEBUG("    book %d. : %d \n", k, floor_setup->data.t1.subclass_books[j][k]);
504
                }
505
            }
506

    
507
            floor_setup->data.t1.multiplier=get_bits(gb, 2)+1;
508
            floor_setup->data.t1.x_list_dim=2;
509

    
510
            for(j=0;j<floor_setup->data.t1.partitions;++j) {
511
                floor_setup->data.t1.x_list_dim+=floor_setup->data.t1.class_dimensions[floor_setup->data.t1.partition_class[j]];
512
            }
513

    
514
            floor_setup->data.t1.list=av_mallocz(floor_setup->data.t1.x_list_dim * sizeof(vorbis_floor1_entry));
515

    
516

    
517
            rangebits=get_bits(gb, 4);
518
            floor_setup->data.t1.list[0].x = 0;
519
            floor_setup->data.t1.list[1].x = (1<<rangebits);
520

    
521
            for(j=0;j<floor_setup->data.t1.partitions;++j) {
522
                for(k=0;k<floor_setup->data.t1.class_dimensions[floor_setup->data.t1.partition_class[j]];++k,++floor1_values) {
523
                    floor_setup->data.t1.list[floor1_values].x=get_bits(gb, rangebits);
524

    
525
                    AV_DEBUG(" %d. floor1 Y coord. %d \n", floor1_values, floor_setup->data.t1.list[floor1_values].x);
526
                }
527
            }
528

    
529
// Precalculate order of x coordinates - needed for decode
530
            ff_vorbis_ready_floor1_list(floor_setup->data.t1.list, floor_setup->data.t1.x_list_dim);
531
        }
532
        else if(floor_setup->floor_type==0) {
533
            uint_fast8_t max_codebook_dim=0;
534

    
535
            floor_setup->decode=vorbis_floor0_decode;
536

    
537
            floor_setup->data.t0.order=get_bits(gb, 8);
538
            floor_setup->data.t0.rate=get_bits(gb, 16);
539
            floor_setup->data.t0.bark_map_size=get_bits(gb, 16);
540
            floor_setup->data.t0.amplitude_bits=get_bits(gb, 6);
541
            /* zero would result in a div by zero later *
542
             * 2^0 - 1 == 0                             */
543
            if (floor_setup->data.t0.amplitude_bits == 0) {
544
              av_log(vc->avccontext, AV_LOG_ERROR,
545
                     "Floor 0 amplitude bits is 0.\n");
546
              return 1;
547
            }
548
            floor_setup->data.t0.amplitude_offset=get_bits(gb, 8);
549
            floor_setup->data.t0.num_books=get_bits(gb, 4)+1;
550

    
551
            /* allocate mem for booklist */
552
            floor_setup->data.t0.book_list=
553
                av_malloc(floor_setup->data.t0.num_books);
554
            if(!floor_setup->data.t0.book_list) { return 1; }
555
            /* read book indexes */
556
            {
557
                int idx;
558
                uint_fast8_t book_idx;
559
                for (idx=0;idx<floor_setup->data.t0.num_books;++idx) {
560
                    book_idx=get_bits(gb, 8);
561
                    floor_setup->data.t0.book_list[idx]=book_idx;
562
                    if (vc->codebooks[book_idx].dimensions > max_codebook_dim)
563
                        max_codebook_dim=vc->codebooks[book_idx].dimensions;
564

    
565
                    if (floor_setup->data.t0.book_list[idx]>vc->codebook_count)
566
                        return 1;
567
                }
568
            }
569

    
570
            create_map( vc, i );
571

    
572
            /* allocate mem for lsp coefficients */
573
            {
574
                /* codebook dim is for padding if codebook dim doesn't *
575
                 * divide order+1 then we need to read more data       */
576
                floor_setup->data.t0.lsp=
577
                    av_malloc((floor_setup->data.t0.order+1 + max_codebook_dim)
578
                              * sizeof(float));
579
                if(!floor_setup->data.t0.lsp) { return 1; }
580
            }
581

    
582
#ifdef V_DEBUG /* debug output parsed headers */
583
            AV_DEBUG("floor0 order: %u\n", floor_setup->data.t0.order);
584
            AV_DEBUG("floor0 rate: %u\n", floor_setup->data.t0.rate);
585
            AV_DEBUG("floor0 bark map size: %u\n",
586
              floor_setup->data.t0.bark_map_size);
587
            AV_DEBUG("floor0 amplitude bits: %u\n",
588
              floor_setup->data.t0.amplitude_bits);
589
            AV_DEBUG("floor0 amplitude offset: %u\n",
590
              floor_setup->data.t0.amplitude_offset);
591
            AV_DEBUG("floor0 number of books: %u\n",
592
              floor_setup->data.t0.num_books);
593
            AV_DEBUG("floor0 book list pointer: %p\n",
594
              floor_setup->data.t0.book_list);
595
            {
596
              int idx;
597
              for (idx=0;idx<floor_setup->data.t0.num_books;++idx) {
598
                AV_DEBUG( "  Book %d: %u\n",
599
                  idx+1,
600
                  floor_setup->data.t0.book_list[idx] );
601
              }
602
            }
603
#endif
604
        }
605
        else {
606
            av_log(vc->avccontext, AV_LOG_ERROR, "Invalid floor type!\n");
607
            return 1;
608
        }
609
    }
610
    return 0;
611
}
612

    
613
// Process residues part
614

    
615
static int vorbis_parse_setup_hdr_residues(vorbis_context *vc){
616
    GetBitContext *gb=&vc->gb;
617
    uint_fast8_t i, j, k;
618

    
619
    vc->residue_count=get_bits(gb, 6)+1;
620
    vc->residues=av_mallocz(vc->residue_count * sizeof(vorbis_residue));
621

    
622
    AV_DEBUG(" There are %d residues. \n", vc->residue_count);
623

    
624
    for(i=0;i<vc->residue_count;++i) {
625
        vorbis_residue *res_setup=&vc->residues[i];
626
        uint_fast8_t cascade[64];
627
        uint_fast8_t high_bits;
628
        uint_fast8_t low_bits;
629

    
630
        res_setup->type=get_bits(gb, 16);
631

    
632
        AV_DEBUG(" %d. residue type %d \n", i, res_setup->type);
633

    
634
        res_setup->begin=get_bits(gb, 24);
635
        res_setup->end=get_bits(gb, 24);
636
        res_setup->partition_size=get_bits(gb, 24)+1;
637
        res_setup->classifications=get_bits(gb, 6)+1;
638
        res_setup->classbook=get_bits(gb, 8);
639

    
640
        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,
641
          res_setup->classifications, res_setup->classbook);
642

    
643
        for(j=0;j<res_setup->classifications;++j) {
644
            high_bits=0;
645
            low_bits=get_bits(gb, 3);
646
            if (get_bits1(gb)) {
647
                high_bits=get_bits(gb, 5);
648
            }
649
            cascade[j]=(high_bits<<3)+low_bits;
650

    
651
            AV_DEBUG("     %d class casscade depth: %d \n", j, ilog(cascade[j]));
652
        }
653

    
654
        res_setup->maxpass=0;
655
        for(j=0;j<res_setup->classifications;++j) {
656
            for(k=0;k<8;++k) {
657
                if (cascade[j]&(1<<k)) {
658
                        res_setup->books[j][k]=get_bits(gb, 8);
659

    
660
                    AV_DEBUG("     %d class casscade depth %d book: %d \n", j, k, res_setup->books[j][k]);
661

    
662
                    if (k>res_setup->maxpass) {
663
                        res_setup->maxpass=k;
664
                    }
665
                } else {
666
                    res_setup->books[j][k]=-1;
667
                }
668
            }
669
        }
670
    }
671
    return 0;
672
}
673

    
674
// Process mappings part
675

    
676
static int vorbis_parse_setup_hdr_mappings(vorbis_context *vc) {
677
    GetBitContext *gb=&vc->gb;
678
    uint_fast8_t i, j;
679

    
680
    vc->mapping_count=get_bits(gb, 6)+1;
681
    vc->mappings=av_mallocz(vc->mapping_count * sizeof(vorbis_mapping));
682

    
683
    AV_DEBUG(" There are %d mappings. \n", vc->mapping_count);
684

    
685
    for(i=0;i<vc->mapping_count;++i) {
686
        vorbis_mapping *mapping_setup=&vc->mappings[i];
687

    
688
        if (get_bits(gb, 16)) {
689
            av_log(vc->avccontext, AV_LOG_ERROR, "Other mappings than type 0 are not compliant with the Vorbis I specification. \n");
690
            return 1;
691
        }
692
        if (get_bits1(gb)) {
693
            mapping_setup->submaps=get_bits(gb, 4)+1;
694
        } else {
695
            mapping_setup->submaps=1;
696
        }
697

    
698
        if (get_bits1(gb)) {
699
            mapping_setup->coupling_steps=get_bits(gb, 8)+1;
700
            mapping_setup->magnitude=av_mallocz(mapping_setup->coupling_steps * sizeof(uint_fast8_t));
701
            mapping_setup->angle    =av_mallocz(mapping_setup->coupling_steps * sizeof(uint_fast8_t));
702
            for(j=0;j<mapping_setup->coupling_steps;++j) {
703
                mapping_setup->magnitude[j]=get_bits(gb, ilog(vc->audio_channels-1));
704
                mapping_setup->angle[j]=get_bits(gb, ilog(vc->audio_channels-1));
705
                // FIXME: sanity checks
706
            }
707
        } else {
708
            mapping_setup->coupling_steps=0;
709
        }
710

    
711
        AV_DEBUG("   %d mapping coupling steps: %d \n", i, mapping_setup->coupling_steps);
712

    
713
        if(get_bits(gb, 2)) {
714
            av_log(vc->avccontext, AV_LOG_ERROR, "%d. mapping setup data invalid. \n", i);
715
            return 1; // following spec.
716
        }
717

    
718
        if (mapping_setup->submaps>1) {
719
            mapping_setup->mux=av_mallocz(vc->audio_channels * sizeof(uint_fast8_t));
720
            for(j=0;j<vc->audio_channels;++j) {
721
                mapping_setup->mux[j]=get_bits(gb, 4);
722
            }
723
        }
724

    
725
        for(j=0;j<mapping_setup->submaps;++j) {
726
            skip_bits(gb, 8); // FIXME check?
727
            mapping_setup->submap_floor[j]=get_bits(gb, 8);
728
            mapping_setup->submap_residue[j]=get_bits(gb, 8);
729

    
730
            AV_DEBUG("   %d mapping %d submap : floor %d, residue %d \n", i, j, mapping_setup->submap_floor[j], mapping_setup->submap_residue[j]);
731
        }
732
    }
733
    return 0;
734
}
735

    
736
// Process modes part
737

    
738
static void create_map( vorbis_context * vc, uint_fast8_t floor_number )
739
{
740
    vorbis_floor * floors=vc->floors;
741
    vorbis_floor0 * vf;
742
    int idx;
743
    int_fast8_t blockflag;
744
    int_fast32_t * map;
745
    int_fast32_t n; //TODO: could theoretically be smaller?
746

    
747
    for (blockflag=0;blockflag<2;++blockflag)
748
    {
749
    n=vc->blocksize[blockflag]/2;
750
    floors[floor_number].data.t0.map[blockflag]=
751
        av_malloc((n+1) * sizeof(int_fast32_t)); // n+sentinel
752

    
753
    map=floors[floor_number].data.t0.map[blockflag];
754
    vf=&floors[floor_number].data.t0;
755

    
756
    for (idx=0; idx<n;++idx) {
757
        map[idx]=floor( BARK((vf->rate*idx)/(2.0f*n)) *
758
                              ((vf->bark_map_size)/
759
                               BARK(vf->rate/2.0f )) );
760
        if (vf->bark_map_size-1 < map[idx]) {
761
            map[idx]=vf->bark_map_size-1;
762
        }
763
    }
764
    map[n]=-1;
765
    vf->map_size[blockflag]=n;
766
    }
767

    
768
#   ifdef V_DEBUG
769
    for(idx=0;idx<=n;++idx) {
770
        AV_DEBUG("floor0 map: map at pos %d is %d\n",
771
                 idx, map[idx]);
772
    }
773
#   endif
774
}
775

    
776
static int vorbis_parse_setup_hdr_modes(vorbis_context *vc) {
777
    GetBitContext *gb=&vc->gb;
778
    uint_fast8_t i;
779

    
780
    vc->mode_count=get_bits(gb, 6)+1;
781
    vc->modes=av_mallocz(vc->mode_count * sizeof(vorbis_mode));
782

    
783
    AV_DEBUG(" There are %d modes.\n", vc->mode_count);
784

    
785
    for(i=0;i<vc->mode_count;++i) {
786
        vorbis_mode *mode_setup=&vc->modes[i];
787

    
788
        mode_setup->blockflag=get_bits1(gb);
789
        mode_setup->windowtype=get_bits(gb, 16); //FIXME check
790
        mode_setup->transformtype=get_bits(gb, 16); //FIXME check
791
        mode_setup->mapping=get_bits(gb, 8); //FIXME check
792

    
793
        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);
794
    }
795
    return 0;
796
}
797

    
798
// Process the whole setup header using the functions above
799

    
800
static int vorbis_parse_setup_hdr(vorbis_context *vc) {
801
    GetBitContext *gb=&vc->gb;
802

    
803
    if ((get_bits(gb, 8)!='v') || (get_bits(gb, 8)!='o') ||
804
    (get_bits(gb, 8)!='r') || (get_bits(gb, 8)!='b') ||
805
    (get_bits(gb, 8)!='i') || (get_bits(gb, 8)!='s')) {
806
        av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (no vorbis signature). \n");
807
        return 1;
808
    }
809

    
810
    if (vorbis_parse_setup_hdr_codebooks(vc)) {
811
        av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (codebooks). \n");
812
        return 2;
813
    }
814
    if (vorbis_parse_setup_hdr_tdtransforms(vc)) {
815
        av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (time domain transforms). \n");
816
        return 3;
817
    }
818
    if (vorbis_parse_setup_hdr_floors(vc)) {
819
        av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (floors). \n");
820
        return 4;
821
    }
822
    if (vorbis_parse_setup_hdr_residues(vc)) {
823
        av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (residues). \n");
824
        return 5;
825
    }
826
    if (vorbis_parse_setup_hdr_mappings(vc)) {
827
        av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (mappings). \n");
828
        return 6;
829
    }
830
    if (vorbis_parse_setup_hdr_modes(vc)) {
831
        av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (modes). \n");
832
        return 7;
833
    }
834
    if (!get_bits1(gb)) {
835
        av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (framing flag). \n");
836
        return 8; // framing flag bit unset error
837
    }
838

    
839
    return 0;
840
}
841

    
842
// Process the identification header
843

    
844
static int vorbis_parse_id_hdr(vorbis_context *vc){
845
    GetBitContext *gb=&vc->gb;
846
    uint_fast8_t bl0, bl1;
847

    
848
    if ((get_bits(gb, 8)!='v') || (get_bits(gb, 8)!='o') ||
849
    (get_bits(gb, 8)!='r') || (get_bits(gb, 8)!='b') ||
850
    (get_bits(gb, 8)!='i') || (get_bits(gb, 8)!='s')) {
851
        av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis id header packet corrupt (no vorbis signature). \n");
852
        return 1;
853
    }
854

    
855
    vc->version=get_bits_long(gb, 32);    //FIXME check 0
856
    vc->audio_channels=get_bits(gb, 8);   //FIXME check >0
857
    vc->audio_samplerate=get_bits_long(gb, 32);   //FIXME check >0
858
    vc->bitrate_maximum=get_bits_long(gb, 32);
859
    vc->bitrate_nominal=get_bits_long(gb, 32);
860
    vc->bitrate_minimum=get_bits_long(gb, 32);
861
    bl0=get_bits(gb, 4);
862
    bl1=get_bits(gb, 4);
863
    vc->blocksize[0]=(1<<bl0);
864
    vc->blocksize[1]=(1<<bl1);
865
    if (bl0>13 || bl0<6 || bl1>13 || bl1<6 || bl1<bl0) {
866
        av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis id header packet corrupt (illegal blocksize). \n");
867
        return 3;
868
    }
869
    // output format int16
870
    if (vc->blocksize[1]/2 * vc->audio_channels * 2 >
871
                                             AVCODEC_MAX_AUDIO_FRAME_SIZE) {
872
        av_log(vc->avccontext, AV_LOG_ERROR, "Vorbis channel count makes "
873
               "output packets too large.\n");
874
        return 4;
875
    }
876
    vc->win[0]=ff_vorbis_vwin[bl0-6];
877
    vc->win[1]=ff_vorbis_vwin[bl1-6];
878

    
879
    if(vc->exp_bias){
880
        int i, j;
881
        for(j=0; j<2; j++){
882
            float *win = av_malloc(vc->blocksize[j]/2 * sizeof(float));
883
            for(i=0; i<vc->blocksize[j]/2; i++)
884
                win[i] = vc->win[j][i] * (1<<15);
885
            vc->win[j] = win;
886
        }
887
    }
888

    
889
    if ((get_bits1(gb)) == 0) {
890
        av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis id header packet corrupt (framing flag not set). \n");
891
        return 2;
892
    }
893

    
894
    vc->channel_residues= av_malloc((vc->blocksize[1]/2)*vc->audio_channels * sizeof(float));
895
    vc->channel_floors  = av_malloc((vc->blocksize[1]/2)*vc->audio_channels * sizeof(float));
896
    vc->saved           = av_mallocz((vc->blocksize[1]/4)*vc->audio_channels * sizeof(float));
897
    vc->previous_window=0;
898

    
899
    ff_mdct_init(&vc->mdct[0], bl0, 1, 1.0);
900
    ff_mdct_init(&vc->mdct[1], bl1, 1, 1.0);
901

    
902
    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 ",
903
            vc->version, vc->audio_channels, vc->audio_samplerate, vc->bitrate_maximum, vc->bitrate_nominal, vc->bitrate_minimum, vc->blocksize[0], vc->blocksize[1]);
904

    
905
/*
906
    BLK=vc->blocksize[0];
907
    for(i=0;i<BLK/2;++i) {
908
        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)));
909
    }
910
*/
911

    
912
    return 0;
913
}
914

    
915
// Process the extradata using the functions above (identification header, setup header)
916

    
917
static av_cold int vorbis_decode_init(AVCodecContext *avccontext) {
918
    vorbis_context *vc = avccontext->priv_data ;
919
    uint8_t *headers = avccontext->extradata;
920
    int headers_len=avccontext->extradata_size;
921
    uint8_t *header_start[3];
922
    int header_len[3];
923
    GetBitContext *gb = &(vc->gb);
924
    int hdr_type;
925

    
926
    vc->avccontext = avccontext;
927
    dsputil_init(&vc->dsp, avccontext);
928

    
929
    if(vc->dsp.float_to_int16_interleave == ff_float_to_int16_interleave_c) {
930
        vc->add_bias = 385;
931
        vc->exp_bias = 0;
932
    } else {
933
        vc->add_bias = 0;
934
        vc->exp_bias = 15<<23;
935
    }
936

    
937
    if (!headers_len) {
938
        av_log(avccontext, AV_LOG_ERROR, "Extradata corrupt.\n");
939
        return -1;
940
    }
941

    
942
    if (ff_split_xiph_headers(headers, headers_len, 30, header_start, header_len) < 0) {
943
        av_log(avccontext, AV_LOG_ERROR, "Extradata corrupt.\n");
944
        return -1;
945
    }
946

    
947
    init_get_bits(gb, header_start[0], header_len[0]*8);
948
    hdr_type=get_bits(gb, 8);
949
    if (hdr_type!=1) {
950
        av_log(avccontext, AV_LOG_ERROR, "First header is not the id header.\n");
951
        return -1;
952
    }
953
    if (vorbis_parse_id_hdr(vc)) {
954
        av_log(avccontext, AV_LOG_ERROR, "Id header corrupt.\n");
955
        vorbis_free(vc);
956
        return -1;
957
    }
958

    
959
    init_get_bits(gb, header_start[2], header_len[2]*8);
960
    hdr_type=get_bits(gb, 8);
961
    if (hdr_type!=5) {
962
        av_log(avccontext, AV_LOG_ERROR, "Third header is not the setup header.\n");
963
        vorbis_free(vc);
964
        return -1;
965
    }
966
    if (vorbis_parse_setup_hdr(vc)) {
967
        av_log(avccontext, AV_LOG_ERROR, "Setup header corrupt.\n");
968
        vorbis_free(vc);
969
        return -1;
970
    }
971

    
972
    avccontext->channels = vc->audio_channels;
973
    avccontext->sample_rate = vc->audio_samplerate;
974
    avccontext->frame_size  = FFMIN(vc->blocksize[0], vc->blocksize[1])>>2;
975
    avccontext->sample_fmt = SAMPLE_FMT_S16;
976

    
977
    return 0 ;
978
}
979

    
980
// Decode audiopackets -------------------------------------------------
981

    
982
// Read and decode floor
983

    
984
static uint_fast8_t vorbis_floor0_decode(vorbis_context *vc,
985
                                         vorbis_floor_data *vfu, float *vec) {
986
    vorbis_floor0 * vf=&vfu->t0;
987
    float * lsp=vf->lsp;
988
    uint_fast32_t amplitude;
989
    uint_fast32_t book_idx;
990
    uint_fast8_t blockflag=vc->modes[vc->mode_number].blockflag;
991

    
992
    amplitude=get_bits(&vc->gb, vf->amplitude_bits);
993
    if (amplitude>0) {
994
        float last = 0;
995
        uint_fast16_t lsp_len = 0;
996
        uint_fast16_t idx;
997
        vorbis_codebook codebook;
998

    
999
        book_idx=get_bits(&vc->gb, ilog(vf->num_books));
1000
        if ( book_idx >= vf->num_books ) {
1001
            av_log( vc->avccontext, AV_LOG_ERROR,
1002
                    "floor0 dec: booknumber too high!\n" );
1003
            book_idx= 0;
1004
            //FIXME: look above
1005
        }
1006
        AV_DEBUG( "floor0 dec: booknumber: %u\n", book_idx );
1007
        codebook=vc->codebooks[vf->book_list[book_idx]];
1008

    
1009
        while (lsp_len<vf->order) {
1010
            int vec_off;
1011

    
1012
            AV_DEBUG( "floor0 dec: book dimension: %d\n", codebook.dimensions );
1013
            AV_DEBUG( "floor0 dec: maximum depth: %d\n", codebook.maxdepth );
1014
            /* read temp vector */
1015
            vec_off=get_vlc2(&vc->gb,
1016
                             codebook.vlc.table,
1017
                             codebook.nb_bits,
1018
                             codebook.maxdepth ) *
1019
                             codebook.dimensions;
1020
            AV_DEBUG( "floor0 dec: vector offset: %d\n", vec_off );
1021
            /* copy each vector component and add last to it */
1022
            for (idx=0; idx<codebook.dimensions; ++idx) {
1023
                lsp[lsp_len+idx]=codebook.codevectors[vec_off+idx]+last;
1024
            }
1025
            last=lsp[lsp_len+idx-1]; /* set last to last vector component */
1026

    
1027
            lsp_len += codebook.dimensions;
1028
        }
1029
#ifdef V_DEBUG
1030
        /* DEBUG: output lsp coeffs */
1031
        {
1032
            int idx;
1033
            for ( idx = 0; idx < lsp_len; ++idx )
1034
                AV_DEBUG("floor0 dec: coeff at %d is %f\n", idx, lsp[idx] );
1035
        }
1036
#endif
1037

    
1038
        /* synthesize floor output vector */
1039
        {
1040
            int i;
1041
            int order=vf->order;
1042
            float wstep=M_PI/vf->bark_map_size;
1043

    
1044
            for(i=0;i<order;i++) { lsp[i]=2.0f*cos(lsp[i]); }
1045

    
1046
            AV_DEBUG("floor0 synth: map_size=%d; m=%d; wstep=%f\n",
1047
                     vf->map_size, order, wstep);
1048

    
1049
            i=0;
1050
            while(i<vf->map_size[blockflag]) {
1051
                int j, iter_cond=vf->map[blockflag][i];
1052
                float p=0.5f;
1053
                float q=0.5f;
1054
                float two_cos_w=2.0f*cos(wstep*iter_cond); // needed all times
1055

    
1056
                /* similar part for the q and p products */
1057
                for(j=0;j+1<order;j+=2) {
1058
                    q *= lsp[j]  -two_cos_w;
1059
                    p *= lsp[j+1]-two_cos_w;
1060
                }
1061
                if(j==order) { // even order
1062
                    p *= p*(2.0f-two_cos_w);
1063
                    q *= q*(2.0f+two_cos_w);
1064
                }
1065
                else { // odd order
1066
                    q *= two_cos_w-lsp[j]; // one more time for q
1067

    
1068
                    /* final step and square */
1069
                    p *= p*(4.f-two_cos_w*two_cos_w);
1070
                    q *= q;
1071
                }
1072

    
1073
                /* calculate linear floor value */
1074
                {
1075
                    q=exp( (
1076
                             ( (amplitude*vf->amplitude_offset)/
1077
                               (((1<<vf->amplitude_bits)-1) * sqrt(p+q)) )
1078
                             - vf->amplitude_offset ) * .11512925f
1079
                         );
1080
                }
1081

    
1082
                /* fill vector */
1083
                do { vec[i]=q; ++i; }while(vf->map[blockflag][i]==iter_cond);
1084
            }
1085
        }
1086
    }
1087
    else {
1088
        /* this channel is unused */
1089
        return 1;
1090
    }
1091

    
1092
    AV_DEBUG(" Floor0 decoded\n");
1093

    
1094
    return 0;
1095
}
1096

    
1097
static uint_fast8_t vorbis_floor1_decode(vorbis_context *vc, vorbis_floor_data *vfu, float *vec) {
1098
    vorbis_floor1 * vf=&vfu->t1;
1099
    GetBitContext *gb=&vc->gb;
1100
    uint_fast16_t range_v[4]={ 256, 128, 86, 64 };
1101
    uint_fast16_t range=range_v[vf->multiplier-1];
1102
    uint_fast16_t floor1_Y[vf->x_list_dim];
1103
    uint_fast16_t floor1_Y_final[vf->x_list_dim];
1104
    int floor1_flag[vf->x_list_dim];
1105
    uint_fast8_t class_;
1106
    uint_fast8_t cdim;
1107
    uint_fast8_t cbits;
1108
    uint_fast8_t csub;
1109
    uint_fast8_t cval;
1110
    int_fast16_t book;
1111
    uint_fast16_t offset;
1112
    uint_fast16_t i,j;
1113
    /*u*/int_fast16_t adx, ady, off, predicted; // WTF ? dy/adx= (unsigned)dy/adx ?
1114
    int_fast16_t dy, err;
1115

    
1116

    
1117
    if (!get_bits1(gb)) return 1; // silence
1118

    
1119
// Read values (or differences) for the floor's points
1120

    
1121
    floor1_Y[0]=get_bits(gb, ilog(range-1));
1122
    floor1_Y[1]=get_bits(gb, ilog(range-1));
1123

    
1124
    AV_DEBUG("floor 0 Y %d floor 1 Y %d \n", floor1_Y[0], floor1_Y[1]);
1125

    
1126
    offset=2;
1127
    for(i=0;i<vf->partitions;++i) {
1128
        class_=vf->partition_class[i];
1129
        cdim=vf->class_dimensions[class_];
1130
        cbits=vf->class_subclasses[class_];
1131
        csub=(1<<cbits)-1;
1132
        cval=0;
1133

    
1134
        AV_DEBUG("Cbits %d \n", cbits);
1135

    
1136
        if (cbits) { // this reads all subclasses for this partition's class
1137
            cval=get_vlc2(gb, vc->codebooks[vf->class_masterbook[class_]].vlc.table,
1138
            vc->codebooks[vf->class_masterbook[class_]].nb_bits, 3);
1139
        }
1140

    
1141
        for(j=0;j<cdim;++j) {
1142
            book=vf->subclass_books[class_][cval & csub];
1143

    
1144
            AV_DEBUG("book %d Cbits %d cval %d  bits:%d \n", book, cbits, cval, get_bits_count(gb));
1145

    
1146
            cval=cval>>cbits;
1147
            if (book>-1) {
1148
                floor1_Y[offset+j]=get_vlc2(gb, vc->codebooks[book].vlc.table,
1149
                vc->codebooks[book].nb_bits, 3);
1150
            } else {
1151
                floor1_Y[offset+j]=0;
1152
            }
1153

    
1154
            AV_DEBUG(" floor(%d) = %d \n", vf->list[offset+j].x, floor1_Y[offset+j]);
1155
        }
1156
        offset+=cdim;
1157
    }
1158

    
1159
// Amplitude calculation from the differences
1160

    
1161
    floor1_flag[0]=1;
1162
    floor1_flag[1]=1;
1163
    floor1_Y_final[0]=floor1_Y[0];
1164
    floor1_Y_final[1]=floor1_Y[1];
1165

    
1166
    for(i=2;i<vf->x_list_dim;++i) {
1167
        uint_fast16_t val, highroom, lowroom, room;
1168
        uint_fast16_t high_neigh_offs;
1169
        uint_fast16_t low_neigh_offs;
1170

    
1171
        low_neigh_offs=vf->list[i].low;
1172
        high_neigh_offs=vf->list[i].high;
1173
        dy=floor1_Y_final[high_neigh_offs]-floor1_Y_final[low_neigh_offs];  // render_point begin
1174
        adx=vf->list[high_neigh_offs].x-vf->list[low_neigh_offs].x;
1175
        ady= FFABS(dy);
1176
        err=ady*(vf->list[i].x-vf->list[low_neigh_offs].x);
1177
        off=(int16_t)err/(int16_t)adx;
1178
        if (dy<0) {
1179
            predicted=floor1_Y_final[low_neigh_offs]-off;
1180
        } else {
1181
            predicted=floor1_Y_final[low_neigh_offs]+off;
1182
        } // render_point end
1183

    
1184
        val=floor1_Y[i];
1185
        highroom=range-predicted;
1186
        lowroom=predicted;
1187
        if (highroom < lowroom) {
1188
            room=highroom*2;
1189
        } else {
1190
            room=lowroom*2;   // SPEC mispelling
1191
        }
1192
        if (val) {
1193
            floor1_flag[low_neigh_offs]=1;
1194
            floor1_flag[high_neigh_offs]=1;
1195
            floor1_flag[i]=1;
1196
            if (val>=room) {
1197
                if (highroom > lowroom) {
1198
                    floor1_Y_final[i]=val-lowroom+predicted;
1199
                } else {
1200
                    floor1_Y_final[i]=predicted-val+highroom-1;
1201
                }
1202
            } else {
1203
                if (val & 1) {
1204
                    floor1_Y_final[i]=predicted-(val+1)/2;
1205
                } else {
1206
                    floor1_Y_final[i]=predicted+val/2;
1207
                }
1208
            }
1209
        } else {
1210
            floor1_flag[i]=0;
1211
            floor1_Y_final[i]=predicted;
1212
        }
1213

    
1214
        AV_DEBUG(" Decoded floor(%d) = %d / val %d \n", vf->list[i].x, floor1_Y_final[i], val);
1215
    }
1216

    
1217
// Curve synth - connect the calculated dots and convert from dB scale FIXME optimize ?
1218

    
1219
    ff_vorbis_floor1_render_list(vf->list, vf->x_list_dim, floor1_Y_final, floor1_flag, vf->multiplier, vec, vf->list[1].x);
1220

    
1221
    AV_DEBUG(" Floor decoded\n");
1222

    
1223
    return 0;
1224
}
1225

    
1226
// Read and decode residue
1227

    
1228
static 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) {
1229
    GetBitContext *gb=&vc->gb;
1230
    uint_fast8_t c_p_c=vc->codebooks[vr->classbook].dimensions;
1231
    uint_fast16_t n_to_read=vr->end-vr->begin;
1232
    uint_fast16_t ptns_to_read=n_to_read/vr->partition_size;
1233
    uint_fast8_t classifs[ptns_to_read*vc->audio_channels];
1234
    uint_fast8_t pass;
1235
    uint_fast8_t ch_used;
1236
    uint_fast8_t i,j,l;
1237
    uint_fast16_t k;
1238

    
1239
    if (vr_type==2) {
1240
        for(j=1;j<ch;++j) {
1241
                do_not_decode[0]&=do_not_decode[j];  // FIXME - clobbering input
1242
        }
1243
        if (do_not_decode[0]) return 0;
1244
        ch_used=1;
1245
    } else {
1246
        ch_used=ch;
1247
    }
1248

    
1249
    AV_DEBUG(" residue type 0/1/2 decode begin, ch: %d  cpc %d  \n", ch, c_p_c);
1250

    
1251
    for(pass=0;pass<=vr->maxpass;++pass) { // FIXME OPTIMIZE?
1252
        uint_fast16_t voffset;
1253
        uint_fast16_t partition_count;
1254
        uint_fast16_t j_times_ptns_to_read;
1255

    
1256
        voffset=vr->begin;
1257
        for(partition_count=0;partition_count<ptns_to_read;) {  // SPEC        error
1258
            if (!pass) {
1259
                uint_fast32_t inverse_class = ff_inverse[vr->classifications];
1260
                for(j_times_ptns_to_read=0, j=0;j<ch_used;++j) {
1261
                    if (!do_not_decode[j]) {
1262
                        uint_fast32_t temp=get_vlc2(gb, vc->codebooks[vr->classbook].vlc.table,
1263
                        vc->codebooks[vr->classbook].nb_bits, 3);
1264

    
1265
                        AV_DEBUG("Classword: %d \n", temp);
1266

    
1267
                        assert(vr->classifications > 1 && temp<=65536); //needed for inverse[]
1268
                        for(i=0;i<c_p_c;++i) {
1269
                            uint_fast32_t temp2;
1270

    
1271
                            temp2=(((uint_fast64_t)temp) * inverse_class)>>32;
1272
                            if (partition_count+c_p_c-1-i < ptns_to_read) {
1273
                                classifs[j_times_ptns_to_read+partition_count+c_p_c-1-i]=temp-temp2*vr->classifications;
1274
                            }
1275
                            temp=temp2;
1276
                        }
1277
                    }
1278
                    j_times_ptns_to_read+=ptns_to_read;
1279
                }
1280
            }
1281
            for(i=0;(i<c_p_c) && (partition_count<ptns_to_read);++i) {
1282
                for(j_times_ptns_to_read=0, j=0;j<ch_used;++j) {
1283
                    uint_fast16_t voffs;
1284

    
1285
                    if (!do_not_decode[j]) {
1286
                        uint_fast8_t vqclass=classifs[j_times_ptns_to_read+partition_count];
1287
                        int_fast16_t vqbook=vr->books[vqclass][pass];
1288

    
1289
                        if (vqbook>=0 && vc->codebooks[vqbook].codevectors) {
1290
                            uint_fast16_t coffs;
1291
                            unsigned dim= vc->codebooks[vqbook].dimensions; // not uint_fast8_t: 64bit is slower here on amd64
1292
                            uint_fast16_t step= dim==1 ? vr->partition_size
1293
                                              : FASTDIV(vr->partition_size, dim);
1294
                            vorbis_codebook codebook= vc->codebooks[vqbook];
1295

    
1296
                            if (vr_type==0) {
1297

    
1298
                                voffs=voffset+j*vlen;
1299
                                for(k=0;k<step;++k) {
1300
                                    coffs=get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * dim;
1301
                                    for(l=0;l<dim;++l) {
1302
                                        vec[voffs+k+l*step]+=codebook.codevectors[coffs+l];  // FPMATH
1303
                                    }
1304
                                }
1305
                            }
1306
                            else if (vr_type==1) {
1307
                                voffs=voffset+j*vlen;
1308
                                for(k=0;k<step;++k) {
1309
                                    coffs=get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * dim;
1310
                                    for(l=0;l<dim;++l, ++voffs) {
1311
                                        vec[voffs]+=codebook.codevectors[coffs+l];  // FPMATH
1312

    
1313
                                        AV_DEBUG(" pass %d offs: %d curr: %f change: %f cv offs.: %d  \n", pass, voffs, vec[voffs], codebook.codevectors[coffs+l], coffs);
1314
                                    }
1315
                                }
1316
                            }
1317
                            else if (vr_type==2 && ch==2 && (voffset&1)==0 && (dim&1)==0) { // most frequent case optimized
1318
                                voffs=voffset>>1;
1319

    
1320
                                if(dim==2) {
1321
                                    for(k=0;k<step;++k) {
1322
                                        coffs=get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * 2;
1323
                                        vec[voffs+k     ]+=codebook.codevectors[coffs  ];  // FPMATH
1324
                                        vec[voffs+k+vlen]+=codebook.codevectors[coffs+1];  // FPMATH
1325
                                    }
1326
                                } else if(dim==4) {
1327
                                    for(k=0;k<step;++k, voffs+=2) {
1328
                                        coffs=get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * 4;
1329
                                        vec[voffs       ]+=codebook.codevectors[coffs  ];  // FPMATH
1330
                                        vec[voffs+1     ]+=codebook.codevectors[coffs+2];  // FPMATH
1331
                                        vec[voffs+vlen  ]+=codebook.codevectors[coffs+1];  // FPMATH
1332
                                        vec[voffs+vlen+1]+=codebook.codevectors[coffs+3];  // FPMATH
1333
                                    }
1334
                                } else
1335
                                for(k=0;k<step;++k) {
1336
                                    coffs=get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * dim;
1337
                                    for(l=0;l<dim;l+=2, voffs++) {
1338
                                        vec[voffs     ]+=codebook.codevectors[coffs+l  ];  // FPMATH
1339
                                        vec[voffs+vlen]+=codebook.codevectors[coffs+l+1];  // FPMATH
1340

    
1341
                                        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);
1342
                                    }
1343
                                }
1344

    
1345
                            }
1346
                            else if (vr_type==2) {
1347
                                voffs=voffset;
1348

    
1349
                                for(k=0;k<step;++k) {
1350
                                    coffs=get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * dim;
1351
                                    for(l=0;l<dim;++l, ++voffs) {
1352
                                        vec[voffs/ch+(voffs%ch)*vlen]+=codebook.codevectors[coffs+l];  // FPMATH FIXME use if and counter instead of / and %
1353

    
1354
                                        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);
1355
                                    }
1356
                                }
1357
                            }
1358
                        }
1359
                    }
1360
                    j_times_ptns_to_read+=ptns_to_read;
1361
                }
1362
                ++partition_count;
1363
                voffset+=vr->partition_size;
1364
            }
1365
        }
1366
    }
1367
    return 0;
1368
}
1369

    
1370
static 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)
1371
{
1372
    if (vr->type==2)
1373
        return vorbis_residue_decode_internal(vc, vr, ch, do_not_decode, vec, vlen, 2);
1374
    else if (vr->type==1)
1375
        return vorbis_residue_decode_internal(vc, vr, ch, do_not_decode, vec, vlen, 1);
1376
    else if (vr->type==0)
1377
        return vorbis_residue_decode_internal(vc, vr, ch, do_not_decode, vec, vlen, 0);
1378
    else {
1379
        av_log(vc->avccontext, AV_LOG_ERROR, " Invalid residue type while residue decode?! \n");
1380
        return 1;
1381
    }
1382
}
1383

    
1384
void vorbis_inverse_coupling(float *mag, float *ang, int blocksize)
1385
{
1386
    int i;
1387
    for(i=0; i<blocksize; i++)
1388
    {
1389
        if (mag[i]>0.0) {
1390
            if (ang[i]>0.0) {
1391
                ang[i]=mag[i]-ang[i];
1392
            } else {
1393
                float temp=ang[i];
1394
                ang[i]=mag[i];
1395
                mag[i]+=temp;
1396
            }
1397
        } else {
1398
            if (ang[i]>0.0) {
1399
                ang[i]+=mag[i];
1400
            } else {
1401
                float temp=ang[i];
1402
                ang[i]=mag[i];
1403
                mag[i]-=temp;
1404
            }
1405
        }
1406
    }
1407
}
1408

    
1409
static void copy_normalize(float *dst, float *src, int len, int exp_bias, float add_bias)
1410
{
1411
    int i;
1412
    if(exp_bias) {
1413
        for(i=0; i<len; i++)
1414
            ((uint32_t*)dst)[i] = ((uint32_t*)src)[i] + exp_bias; // dst[k]=src[i]*(1<<bias)
1415
    } else {
1416
        for(i=0; i<len; i++)
1417
            dst[i] = src[i] + add_bias;
1418
    }
1419
}
1420

    
1421
// Decode the audio packet using the functions above
1422

    
1423
static int vorbis_parse_audio_packet(vorbis_context *vc) {
1424
    GetBitContext *gb=&vc->gb;
1425

    
1426
    uint_fast8_t previous_window=vc->previous_window;
1427
    uint_fast8_t mode_number;
1428
    uint_fast8_t blockflag;
1429
    uint_fast16_t blocksize;
1430
    int_fast32_t i,j;
1431
    uint_fast8_t no_residue[vc->audio_channels];
1432
    uint_fast8_t do_not_decode[vc->audio_channels];
1433
    vorbis_mapping *mapping;
1434
    float *ch_res_ptr=vc->channel_residues;
1435
    float *ch_floor_ptr=vc->channel_floors;
1436
    uint_fast8_t res_chan[vc->audio_channels];
1437
    uint_fast8_t res_num=0;
1438
    int_fast16_t retlen=0;
1439
    float fadd_bias = vc->add_bias;
1440

    
1441
    if (get_bits1(gb)) {
1442
        av_log(vc->avccontext, AV_LOG_ERROR, "Not a Vorbis I audio packet.\n");
1443
        return -1; // packet type not audio
1444
    }
1445

    
1446
    if (vc->mode_count==1) {
1447
        mode_number=0;
1448
    } else {
1449
        mode_number=get_bits(gb, ilog(vc->mode_count-1));
1450
    }
1451
    vc->mode_number=mode_number;
1452
    mapping=&vc->mappings[vc->modes[mode_number].mapping];
1453

    
1454
    AV_DEBUG(" Mode number: %d , mapping: %d , blocktype %d \n", mode_number, vc->modes[mode_number].mapping, vc->modes[mode_number].blockflag);
1455

    
1456
    blockflag=vc->modes[mode_number].blockflag;
1457
    blocksize=vc->blocksize[blockflag];
1458
    if (blockflag) {
1459
        skip_bits(gb, 2); // previous_window, next_window
1460
    }
1461

    
1462
    memset(ch_res_ptr, 0, sizeof(float)*vc->audio_channels*blocksize/2); //FIXME can this be removed ?
1463
    memset(ch_floor_ptr, 0, sizeof(float)*vc->audio_channels*blocksize/2); //FIXME can this be removed ?
1464

    
1465
// Decode floor
1466

    
1467
    for(i=0;i<vc->audio_channels;++i) {
1468
        vorbis_floor *floor;
1469
        if (mapping->submaps>1) {
1470
            floor=&vc->floors[mapping->submap_floor[mapping->mux[i]]];
1471
        } else {
1472
            floor=&vc->floors[mapping->submap_floor[0]];
1473
        }
1474

    
1475
        no_residue[i]=floor->decode(vc, &floor->data, ch_floor_ptr);
1476
        ch_floor_ptr+=blocksize/2;
1477
    }
1478

    
1479
// Nonzero vector propagate
1480

    
1481
    for(i=mapping->coupling_steps-1;i>=0;--i) {
1482
        if (!(no_residue[mapping->magnitude[i]] & no_residue[mapping->angle[i]])) {
1483
            no_residue[mapping->magnitude[i]]=0;
1484
            no_residue[mapping->angle[i]]=0;
1485
        }
1486
    }
1487

    
1488
// Decode residue
1489

    
1490
    for(i=0;i<mapping->submaps;++i) {
1491
        vorbis_residue *residue;
1492
        uint_fast8_t ch=0;
1493

    
1494
        for(j=0;j<vc->audio_channels;++j) {
1495
            if ((mapping->submaps==1) || (i=mapping->mux[j])) {
1496
                res_chan[j]=res_num;
1497
                if (no_residue[j]) {
1498
                    do_not_decode[ch]=1;
1499
                } else {
1500
                    do_not_decode[ch]=0;
1501
                }
1502
                ++ch;
1503
                ++res_num;
1504
            }
1505
        }
1506
        residue=&vc->residues[mapping->submap_residue[i]];
1507
        vorbis_residue_decode(vc, residue, ch, do_not_decode, ch_res_ptr, blocksize/2);
1508

    
1509
        ch_res_ptr+=ch*blocksize/2;
1510
    }
1511

    
1512
// Inverse coupling
1513

    
1514
    for(i=mapping->coupling_steps-1;i>=0;--i) { //warning: i has to be signed
1515
        float *mag, *ang;
1516

    
1517
        mag=vc->channel_residues+res_chan[mapping->magnitude[i]]*blocksize/2;
1518
        ang=vc->channel_residues+res_chan[mapping->angle[i]]*blocksize/2;
1519
        vc->dsp.vorbis_inverse_coupling(mag, ang, blocksize/2);
1520
    }
1521

    
1522
// Dotproduct, MDCT
1523

    
1524
    for(j=vc->audio_channels-1;j>=0;j--) {
1525
        ch_floor_ptr=vc->channel_floors+j*blocksize/2;
1526
        ch_res_ptr=vc->channel_residues+res_chan[j]*blocksize/2;
1527
        vc->dsp.vector_fmul(ch_floor_ptr, ch_res_ptr, blocksize/2);
1528
        ff_imdct_half(&vc->mdct[blockflag], ch_res_ptr, ch_floor_ptr);
1529
    }
1530

    
1531
// Overlap/add, save data for next overlapping  FPMATH
1532

    
1533
    retlen = (blocksize + vc->blocksize[previous_window])/4;
1534
    for(j=0;j<vc->audio_channels;j++) {
1535
        uint_fast16_t bs0=vc->blocksize[0];
1536
        uint_fast16_t bs1=vc->blocksize[1];
1537
        float *residue=vc->channel_residues+res_chan[j]*blocksize/2;
1538
        float *saved=vc->saved+j*bs1/4;
1539
        float *ret=vc->channel_floors+j*retlen;
1540
        float *buf=residue;
1541
        const float *win=vc->win[blockflag&previous_window];
1542

    
1543
        if(blockflag == previous_window) {
1544
            vc->dsp.vector_fmul_window(ret, saved, buf, win, fadd_bias, blocksize/4);
1545
        } else if(blockflag > previous_window) {
1546
            vc->dsp.vector_fmul_window(ret, saved, buf, win, fadd_bias, bs0/4);
1547
            copy_normalize(ret+bs0/2, buf+bs0/4, (bs1-bs0)/4, vc->exp_bias, fadd_bias);
1548
        } else {
1549
            copy_normalize(ret, saved, (bs1-bs0)/4, vc->exp_bias, fadd_bias);
1550
            vc->dsp.vector_fmul_window(ret+(bs1-bs0)/4, saved+(bs1-bs0)/4, buf, win, fadd_bias, bs0/4);
1551
        }
1552
        memcpy(saved, buf+blocksize/4, blocksize/4*sizeof(float));
1553
    }
1554

    
1555
    vc->previous_window = blockflag;
1556
    return retlen;
1557
}
1558

    
1559
// Return the decoded audio packet through the standard api
1560

    
1561
static int vorbis_decode_frame(AVCodecContext *avccontext,
1562
                        void *data, int *data_size,
1563
                        AVPacket *avpkt)
1564
{
1565
    const uint8_t *buf = avpkt->data;
1566
    int buf_size = avpkt->size;
1567
    vorbis_context *vc = avccontext->priv_data ;
1568
    GetBitContext *gb = &(vc->gb);
1569
    const float *channel_ptrs[vc->audio_channels];
1570
    int i;
1571

    
1572
    int_fast16_t len;
1573

    
1574
    if(!buf_size){
1575
        return 0;
1576
    }
1577

    
1578
    AV_DEBUG("packet length %d \n", buf_size);
1579

    
1580
    init_get_bits(gb, buf, buf_size*8);
1581

    
1582
    len=vorbis_parse_audio_packet(vc);
1583

    
1584
    if (len<=0) {
1585
        *data_size=0;
1586
        return buf_size;
1587
    }
1588

    
1589
    if (!vc->first_frame) {
1590
        vc->first_frame=1;
1591
        *data_size=0;
1592
        return buf_size ;
1593
    }
1594

    
1595
    AV_DEBUG("parsed %d bytes %d bits, returned %d samples (*ch*bits) \n", get_bits_count(gb)/8, get_bits_count(gb)%8, len);
1596

    
1597
    for(i=0; i<vc->audio_channels; i++)
1598
        channel_ptrs[i] = vc->channel_floors+i*len;
1599
    vc->dsp.float_to_int16_interleave(data, channel_ptrs, len, vc->audio_channels);
1600
    *data_size=len*2*vc->audio_channels;
1601

    
1602
    return buf_size ;
1603
}
1604

    
1605
// Close decoder
1606

    
1607
static av_cold int vorbis_decode_close(AVCodecContext *avccontext) {
1608
    vorbis_context *vc = avccontext->priv_data;
1609

    
1610
    vorbis_free(vc);
1611

    
1612
    return 0 ;
1613
}
1614

    
1615
AVCodec vorbis_decoder = {
1616
    "vorbis",
1617
    CODEC_TYPE_AUDIO,
1618
    CODEC_ID_VORBIS,
1619
    sizeof(vorbis_context),
1620
    vorbis_decode_init,
1621
    NULL,
1622
    vorbis_decode_close,
1623
    vorbis_decode_frame,
1624
    .long_name = NULL_IF_CONFIG_SMALL("Vorbis"),
1625
};
1626