4
* @author Denes Balatoni ( dbalatoni programozo hu )
6
* This file is part of FFmpeg.
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.
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.
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
26
//#define AV_DEBUG(...) av_log(NULL, AV_LOG_INFO, __VA_ARGS__)
30
#define ALT_BITSTREAM_READER_LE
32
#include "bitstream.h"
39
#define V_MAX_VLCS (1<<16)
49
uint_fast8_t dimensions;
50
uint_fast8_t lookup_type;
51
uint_fast8_t maxdepth;
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;
60
struct vorbis_context_s;
62
uint_fast8_t (* vorbis_floor_decode_func)
63
(struct vorbis_context_s *, vorbis_floor_data *, float *);
65
uint_fast8_t floor_type;
66
vorbis_floor_decode_func decode;
69
struct vorbis_floor0_s
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;
82
struct vorbis_floor1_s
84
uint_fast8_t partitions;
85
uint_fast8_t maximum_class;
86
uint_fast8_t partition_class[32];
87
uint_fast8_t class_dimensions[16];
88
uint_fast8_t class_subclasses[16];
89
uint_fast8_t class_masterbook[16];
90
int_fast16_t subclass_books[16][8];
91
uint_fast8_t multiplier;
92
uint_fast16_t x_list_dim;
93
floor1_entry_t * list;
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;
110
uint_fast8_t submaps;
111
uint_fast16_t coupling_steps;
112
uint_fast8_t *magnitude;
115
uint_fast8_t submap_floor[16];
116
uint_fast8_t submap_residue[16];
120
uint_fast8_t blockflag;
121
uint_fast16_t windowtype;
122
uint_fast16_t transformtype;
123
uint_fast8_t mapping;
126
typedef struct vorbis_context_s {
127
AVCodecContext *avccontext;
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;
151
uint_fast8_t mode_number; // mode number for the current packet
152
float *channel_residues;
153
float *channel_floors;
155
uint_fast16_t saved_start;
159
uint_fast32_t add_bias; // for float->int conversion
160
uint_fast32_t exp_bias;
163
/* Helper functions */
166
(13.1f*atan(0.00074f*(x))+2.24f*atan(1.85e-8f*(x)*(x))+1e-4f*(x))
168
unsigned int ff_vorbis_nth_root(unsigned int x, unsigned int n) { // x^(1/n)
169
unsigned int ret=0, i, j;
173
for(i=0,j=ret;i<n-1;i++) j*=ret;
179
static float vorbisfloat2float(uint_fast32_t val) {
180
double mant=val&0x1fffff;
181
long exp=(val&0x7fe00000L)>>21;
182
if (val&0x80000000) mant=-mant;
183
return(ldexp(mant, exp-20-768));
187
// Generate vlc codes from vorbis huffman code lengths
189
int ff_vorbis_len2vlc(uint8_t *bits, uint32_t *codes, uint_fast32_t num) {
190
uint_fast32_t exit_at_level[33]={404,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
191
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0};
194
uint_fast32_t code,p;
200
for(p=0;(bits[p]==0) && (p<num);++p);
202
// av_log(vc->avccontext, AV_LOG_INFO, "An empty codebook. Heh?! \n");
207
for(i=0;i<bits[p];++i) {
208
exit_at_level[i+1]=1<<i;
212
av_log(NULL, AV_LOG_INFO, " %d. of %d code len %d code %d - ", p, num, bits[p], codes[p]);
213
init_get_bits(&gb, (uint_fast8_t *)&codes[p], bits[p]);
214
for(i=0;i<bits[p];++i) {
215
av_log(NULL, AV_LOG_INFO, "%s", get_bits1(&gb) ? "1" : "0");
217
av_log(NULL, AV_LOG_INFO, "\n");
223
if (bits[p]==0) continue;
224
// find corresponding exit(node which the tree can grow further from)
225
for(i=bits[p];i>0;--i) {
226
if (exit_at_level[i]) break;
228
if (!i) return 1; // overspecified tree
229
code=exit_at_level[i];
231
// construct code (append 0s to end) and introduce new exits
232
for(j=i+1;j<=bits[p];++j) {
233
exit_at_level[j]=code+(1<<(j-1));
238
av_log(NULL, AV_LOG_INFO, " %d. code len %d code %d - ", p, bits[p], codes[p]);
239
init_get_bits(&gb, (uint_fast8_t *)&codes[p], bits[p]);
240
for(i=0;i<bits[p];++i) {
241
av_log(NULL, AV_LOG_INFO, "%s", get_bits1(&gb) ? "1" : "0");
243
av_log(NULL, AV_LOG_INFO, "\n");
248
//no exits should be left (underspecified tree - ie. unused valid vlcs - not allowed by SPEC)
250
if (exit_at_level[p]) return 1;
255
void ff_vorbis_ready_floor1_list(floor1_entry_t * list, int values) {
259
for (i = 2; i < values; i++) {
264
for (j = 2; j < i; j++) {
266
if (tmp < list[i].x) {
267
if (tmp > list[list[i].low].x) list[i].low = j;
269
if (tmp < list[list[i].high].x) list[i].high = j;
273
for (i = 0; i < values - 1; i++) {
275
for (j = i + 1; j < values; j++) {
276
if (list[list[i].sort].x > list[list[j].sort].x) {
277
int tmp = list[i].sort;
278
list[i].sort = list[j].sort;
285
// Free all allocated memory -----------------------------------------
287
static void vorbis_free(vorbis_context *vc) {
290
av_freep(&vc->channel_residues);
291
av_freep(&vc->channel_floors);
292
av_freep(&vc->saved);
295
av_freep(&vc->buf_tmp);
297
av_freep(&vc->residues);
298
av_freep(&vc->modes);
300
ff_mdct_end(&vc->mdct[0]);
301
ff_mdct_end(&vc->mdct[1]);
303
for(i=0;i<vc->codebook_count;++i) {
304
av_free(vc->codebooks[i].codevectors);
305
free_vlc(&vc->codebooks[i].vlc);
307
av_freep(&vc->codebooks);
309
for(i=0;i<vc->floor_count;++i) {
310
if(vc->floors[i].floor_type==0) {
311
av_free(vc->floors[i].data.t0.map[0]);
312
av_free(vc->floors[i].data.t0.map[1]);
313
av_free(vc->floors[i].data.t0.book_list);
314
av_free(vc->floors[i].data.t0.lsp);
317
av_free(vc->floors[i].data.t1.list);
320
av_freep(&vc->floors);
322
for(i=0;i<vc->mapping_count;++i) {
323
av_free(vc->mappings[i].magnitude);
324
av_free(vc->mappings[i].angle);
325
av_free(vc->mappings[i].mux);
327
av_freep(&vc->mappings);
330
av_freep(&vc->win[0]);
331
av_freep(&vc->win[1]);
335
// Parse setup header -------------------------------------------------
337
// Process codebooks part
339
static int vorbis_parse_setup_hdr_codebooks(vorbis_context *vc) {
341
uint8_t *tmp_vlc_bits;
342
uint32_t *tmp_vlc_codes;
343
GetBitContext *gb=&vc->gb;
345
vc->codebook_count=get_bits(gb,8)+1;
347
AV_DEBUG(" Codebooks: %d \n", vc->codebook_count);
349
vc->codebooks=(vorbis_codebook *)av_mallocz(vc->codebook_count * sizeof(vorbis_codebook));
350
tmp_vlc_bits=(uint8_t *)av_mallocz(V_MAX_VLCS * sizeof(uint8_t));
351
tmp_vlc_codes=(uint32_t *)av_mallocz(V_MAX_VLCS * sizeof(uint32_t));
353
for(cb=0;cb<vc->codebook_count;++cb) {
354
vorbis_codebook *codebook_setup=&vc->codebooks[cb];
355
uint_fast8_t ordered;
356
uint_fast32_t t, used_entries=0;
357
uint_fast32_t entries;
359
AV_DEBUG(" %d. Codebook \n", cb);
361
if (get_bits(gb, 24)!=0x564342) {
362
av_log(vc->avccontext, AV_LOG_ERROR, " %"PRIdFAST16". Codebook setup data corrupt. \n", cb);
366
codebook_setup->dimensions=get_bits(gb, 16);
367
if (codebook_setup->dimensions>16) {
368
av_log(vc->avccontext, AV_LOG_ERROR, " %"PRIdFAST16". Codebook's dimension is too large (%d). \n", cb, codebook_setup->dimensions);
371
entries=get_bits(gb, 24);
372
if (entries>V_MAX_VLCS) {
373
av_log(vc->avccontext, AV_LOG_ERROR, " %"PRIdFAST16". Codebook has too many entries (%"PRIdFAST32"). \n", cb, entries);
377
ordered=get_bits1(gb);
379
AV_DEBUG(" codebook_dimensions %d, codebook_entries %d \n", codebook_setup->dimensions, entries);
384
uint_fast8_t sparse=get_bits1(gb);
386
AV_DEBUG(" not ordered \n");
389
AV_DEBUG(" sparse \n");
392
for(ce=0;ce<entries;++ce) {
395
tmp_vlc_bits[ce]=get_bits(gb, 5)+1;
398
else tmp_vlc_bits[ce]=0;
401
AV_DEBUG(" not sparse \n");
403
used_entries=entries;
404
for(ce=0;ce<entries;++ce) {
405
tmp_vlc_bits[ce]=get_bits(gb, 5)+1;
409
uint_fast16_t current_entry=0;
410
uint_fast8_t current_length=get_bits(gb, 5)+1;
412
AV_DEBUG(" ordered, current length: %d \n", current_length); //FIXME
414
used_entries=entries;
415
for(;current_entry<used_entries;++current_length) {
416
uint_fast16_t i, number;
418
AV_DEBUG(" number bits: %d ", ilog(entries - current_entry));
420
number=get_bits(gb, ilog(entries - current_entry));
422
AV_DEBUG(" number: %d \n", number);
424
for(i=current_entry;i<number+current_entry;++i) {
425
if (i<used_entries) tmp_vlc_bits[i]=current_length;
428
current_entry+=number;
430
if (current_entry>used_entries) {
431
av_log(vc->avccontext, AV_LOG_ERROR, " More codelengths than codes in codebook. \n");
436
codebook_setup->lookup_type=get_bits(gb, 4);
438
AV_DEBUG(" lookup type: %d : %s \n", codebook_setup->lookup_type, codebook_setup->lookup_type ? "vq" : "no lookup" );
440
// If the codebook is used for (inverse) VQ, calculate codevectors.
442
if (codebook_setup->lookup_type==1) {
443
uint_fast16_t i, j, k;
444
uint_fast16_t codebook_lookup_values=ff_vorbis_nth_root(entries, codebook_setup->dimensions);
445
uint_fast16_t codebook_multiplicands[codebook_lookup_values];
447
float codebook_minimum_value=vorbisfloat2float(get_bits_long(gb, 32));
448
float codebook_delta_value=vorbisfloat2float(get_bits_long(gb, 32));
449
uint_fast8_t codebook_value_bits=get_bits(gb, 4)+1;
450
uint_fast8_t codebook_sequence_p=get_bits1(gb);
452
AV_DEBUG(" We expect %d numbers for building the codevectors. \n", codebook_lookup_values);
453
AV_DEBUG(" delta %f minmum %f \n", codebook_delta_value, codebook_minimum_value);
455
for(i=0;i<codebook_lookup_values;++i) {
456
codebook_multiplicands[i]=get_bits(gb, codebook_value_bits);
458
AV_DEBUG(" multiplicands*delta+minmum : %e \n", (float)codebook_multiplicands[i]*codebook_delta_value+codebook_minimum_value);
459
AV_DEBUG(" multiplicand %d \n", codebook_multiplicands[i]);
462
// Weed out unused vlcs and build codevector vector
463
codebook_setup->codevectors=(float *)av_mallocz(used_entries*codebook_setup->dimensions * sizeof(float));
464
for(j=0, i=0;i<entries;++i) {
465
uint_fast8_t dim=codebook_setup->dimensions;
467
if (tmp_vlc_bits[i]) {
469
uint_fast32_t lookup_offset=i;
472
av_log(vc->avccontext, AV_LOG_INFO, "Lookup offset %d ,", i);
476
uint_fast32_t multiplicand_offset = lookup_offset % codebook_lookup_values;
477
codebook_setup->codevectors[j*dim+k]=codebook_multiplicands[multiplicand_offset]*codebook_delta_value+codebook_minimum_value+last;
478
if (codebook_sequence_p) {
479
last=codebook_setup->codevectors[j*dim+k];
481
lookup_offset/=codebook_lookup_values;
483
tmp_vlc_bits[j]=tmp_vlc_bits[i];
486
av_log(vc->avccontext, AV_LOG_INFO, "real lookup offset %d, vector: ", j);
488
av_log(vc->avccontext, AV_LOG_INFO, " %f ", codebook_setup->codevectors[j*dim+k]);
490
av_log(vc->avccontext, AV_LOG_INFO, "\n");
496
if (j!=used_entries) {
497
av_log(vc->avccontext, AV_LOG_ERROR, "Bug in codevector vector building code. \n");
500
entries=used_entries;
502
else if (codebook_setup->lookup_type>=2) {
503
av_log(vc->avccontext, AV_LOG_ERROR, "Codebook lookup type not supported. \n");
507
// Initialize VLC table
508
if (ff_vorbis_len2vlc(tmp_vlc_bits, tmp_vlc_codes, entries)) {
509
av_log(vc->avccontext, AV_LOG_ERROR, " Invalid code lengths while generating vlcs. \n");
512
codebook_setup->maxdepth=0;
513
for(t=0;t<entries;++t)
514
if (tmp_vlc_bits[t]>=codebook_setup->maxdepth) codebook_setup->maxdepth=tmp_vlc_bits[t];
516
if(codebook_setup->maxdepth > 3*V_NB_BITS) codebook_setup->nb_bits=V_NB_BITS2;
517
else codebook_setup->nb_bits=V_NB_BITS;
519
codebook_setup->maxdepth=(codebook_setup->maxdepth+codebook_setup->nb_bits-1)/codebook_setup->nb_bits;
521
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)) {
522
av_log(vc->avccontext, AV_LOG_ERROR, " Error generating vlc tables. \n");
527
av_free(tmp_vlc_bits);
528
av_free(tmp_vlc_codes);
533
av_free(tmp_vlc_bits);
534
av_free(tmp_vlc_codes);
538
// Process time domain transforms part (unused in Vorbis I)
540
static int vorbis_parse_setup_hdr_tdtransforms(vorbis_context *vc) {
541
GetBitContext *gb=&vc->gb;
543
uint_fast8_t vorbis_time_count=get_bits(gb, 6)+1;
545
for(i=0;i<vorbis_time_count;++i) {
546
uint_fast16_t vorbis_tdtransform=get_bits(gb, 16);
548
AV_DEBUG(" Vorbis time domain transform %d: %d \n", vorbis_time_count, vorbis_tdtransform);
550
if (vorbis_tdtransform) {
551
av_log(vc->avccontext, AV_LOG_ERROR, "Vorbis time domain transform data nonzero. \n");
558
// Process floors part
560
static uint_fast8_t vorbis_floor0_decode(vorbis_context *vc,
561
vorbis_floor_data *vfu, float *vec);
562
static void create_map( vorbis_context * vc, uint_fast8_t floor_number );
563
static uint_fast8_t vorbis_floor1_decode(vorbis_context *vc,
564
vorbis_floor_data *vfu, float *vec);
565
static int vorbis_parse_setup_hdr_floors(vorbis_context *vc) {
566
GetBitContext *gb=&vc->gb;
569
vc->floor_count=get_bits(gb, 6)+1;
571
vc->floors=(vorbis_floor *)av_mallocz(vc->floor_count * sizeof(vorbis_floor));
573
for (i=0;i<vc->floor_count;++i) {
574
vorbis_floor *floor_setup=&vc->floors[i];
576
floor_setup->floor_type=get_bits(gb, 16);
578
AV_DEBUG(" %d. floor type %d \n", i, floor_setup->floor_type);
580
if (floor_setup->floor_type==1) {
581
uint_fast8_t maximum_class=0;
582
uint_fast8_t rangebits;
583
uint_fast16_t floor1_values=2;
585
floor_setup->decode=vorbis_floor1_decode;
587
floor_setup->data.t1.partitions=get_bits(gb, 5);
589
AV_DEBUG(" %d.floor: %d partitions \n", i, floor_setup->data.t1.partitions);
591
for(j=0;j<floor_setup->data.t1.partitions;++j) {
592
floor_setup->data.t1.partition_class[j]=get_bits(gb, 4);
593
if (floor_setup->data.t1.partition_class[j]>maximum_class) maximum_class=floor_setup->data.t1.partition_class[j];
595
AV_DEBUG(" %d. floor %d partition class %d \n", i, j, floor_setup->data.t1.partition_class[j]);
599
AV_DEBUG(" maximum class %d \n", maximum_class);
601
floor_setup->data.t1.maximum_class=maximum_class;
603
for(j=0;j<=maximum_class;++j) {
604
floor_setup->data.t1.class_dimensions[j]=get_bits(gb, 3)+1;
605
floor_setup->data.t1.class_subclasses[j]=get_bits(gb, 2);
607
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]);
609
if (floor_setup->data.t1.class_subclasses[j]) {
610
floor_setup->data.t1.class_masterbook[j]=get_bits(gb, 8);
612
AV_DEBUG(" masterbook: %d \n", floor_setup->data.t1.class_masterbook[j]);
615
for(k=0;k<(1<<floor_setup->data.t1.class_subclasses[j]);++k) {
616
floor_setup->data.t1.subclass_books[j][k]=(int16_t)get_bits(gb, 8)-1;
618
AV_DEBUG(" book %d. : %d \n", k, floor_setup->data.t1.subclass_books[j][k]);
622
floor_setup->data.t1.multiplier=get_bits(gb, 2)+1;
623
floor_setup->data.t1.x_list_dim=2;
625
for(j=0;j<floor_setup->data.t1.partitions;++j) {
626
floor_setup->data.t1.x_list_dim+=floor_setup->data.t1.class_dimensions[floor_setup->data.t1.partition_class[j]];
629
floor_setup->data.t1.list=(floor1_entry_t *)av_mallocz(floor_setup->data.t1.x_list_dim * sizeof(floor1_entry_t));
632
rangebits=get_bits(gb, 4);
633
floor_setup->data.t1.list[0].x = 0;
634
floor_setup->data.t1.list[1].x = (1<<rangebits);
636
for(j=0;j<floor_setup->data.t1.partitions;++j) {
637
for(k=0;k<floor_setup->data.t1.class_dimensions[floor_setup->data.t1.partition_class[j]];++k,++floor1_values) {
638
floor_setup->data.t1.list[floor1_values].x=get_bits(gb, rangebits);
640
AV_DEBUG(" %d. floor1 Y coord. %d \n", floor1_values, floor_setup->data.t1.list[floor1_values].x);
644
// Precalculate order of x coordinates - needed for decode
645
ff_vorbis_ready_floor1_list(floor_setup->data.t1.list, floor_setup->data.t1.x_list_dim);
647
else if(floor_setup->floor_type==0) {
648
uint_fast8_t max_codebook_dim=0;
650
floor_setup->decode=vorbis_floor0_decode;
652
floor_setup->data.t0.order=get_bits(gb, 8);
653
floor_setup->data.t0.rate=get_bits(gb, 16);
654
floor_setup->data.t0.bark_map_size=get_bits(gb, 16);
655
floor_setup->data.t0.amplitude_bits=get_bits(gb, 6);
656
/* zero would result in a div by zero later *
658
if (floor_setup->data.t0.amplitude_bits == 0) {
659
av_log(vc->avccontext, AV_LOG_ERROR,
660
"Floor 0 amplitude bits is 0.\n");
663
floor_setup->data.t0.amplitude_offset=get_bits(gb, 8);
664
floor_setup->data.t0.num_books=get_bits(gb, 4)+1;
666
/* allocate mem for booklist */
667
floor_setup->data.t0.book_list=
668
av_malloc(floor_setup->data.t0.num_books);
669
if(!floor_setup->data.t0.book_list) { return 1; }
670
/* read book indexes */
673
uint_fast8_t book_idx;
674
for (idx=0;idx<floor_setup->data.t0.num_books;++idx) {
675
book_idx=get_bits(gb, 8);
676
floor_setup->data.t0.book_list[idx]=book_idx;
677
if (vc->codebooks[book_idx].dimensions > max_codebook_dim)
678
max_codebook_dim=vc->codebooks[book_idx].dimensions;
680
if (floor_setup->data.t0.book_list[idx]>vc->codebook_count)
687
/* allocate mem for lsp coefficients */
689
/* codebook dim is for padding if codebook dim doesn't *
690
* divide order+1 then we need to read more data */
691
floor_setup->data.t0.lsp=
692
av_malloc((floor_setup->data.t0.order+1 + max_codebook_dim)
694
if(!floor_setup->data.t0.lsp) { return 1; }
697
#ifdef V_DEBUG /* debug output parsed headers */
698
AV_DEBUG("floor0 order: %u\n", floor_setup->data.t0.order);
699
AV_DEBUG("floor0 rate: %u\n", floor_setup->data.t0.rate);
700
AV_DEBUG("floor0 bark map size: %u\n",
701
floor_setup->data.t0.bark_map_size);
702
AV_DEBUG("floor0 amplitude bits: %u\n",
703
floor_setup->data.t0.amplitude_bits);
704
AV_DEBUG("floor0 amplitude offset: %u\n",
705
floor_setup->data.t0.amplitude_offset);
706
AV_DEBUG("floor0 number of books: %u\n",
707
floor_setup->data.t0.num_books);
708
AV_DEBUG("floor0 book list pointer: %p\n",
709
floor_setup->data.t0.book_list);
712
for (idx=0;idx<floor_setup->data.t0.num_books;++idx) {
713
AV_DEBUG( " Book %d: %u\n",
715
floor_setup->data.t0.book_list[idx] );
721
av_log(vc->avccontext, AV_LOG_ERROR, "Invalid floor type!\n");
728
// Process residues part
730
static int vorbis_parse_setup_hdr_residues(vorbis_context *vc){
731
GetBitContext *gb=&vc->gb;
732
uint_fast8_t i, j, k;
734
vc->residue_count=get_bits(gb, 6)+1;
735
vc->residues=(vorbis_residue *)av_mallocz(vc->residue_count * sizeof(vorbis_residue));
737
AV_DEBUG(" There are %d residues. \n", vc->residue_count);
739
for(i=0;i<vc->residue_count;++i) {
740
vorbis_residue *res_setup=&vc->residues[i];
741
uint_fast8_t cascade[64];
742
uint_fast8_t high_bits;
743
uint_fast8_t low_bits;
745
res_setup->type=get_bits(gb, 16);
747
AV_DEBUG(" %d. residue type %d \n", i, res_setup->type);
749
res_setup->begin=get_bits(gb, 24);
750
res_setup->end=get_bits(gb, 24);
751
res_setup->partition_size=get_bits(gb, 24)+1;
752
res_setup->classifications=get_bits(gb, 6)+1;
753
res_setup->classbook=get_bits(gb, 8);
755
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,
756
res_setup->classifications, res_setup->classbook);
758
for(j=0;j<res_setup->classifications;++j) {
760
low_bits=get_bits(gb, 3);
762
high_bits=get_bits(gb, 5);
764
cascade[j]=(high_bits<<3)+low_bits;
766
AV_DEBUG(" %d class casscade depth: %d \n", j, ilog(cascade[j]));
769
res_setup->maxpass=0;
770
for(j=0;j<res_setup->classifications;++j) {
772
if (cascade[j]&(1<<k)) {
773
res_setup->books[j][k]=get_bits(gb, 8);
775
AV_DEBUG(" %d class casscade depth %d book: %d \n", j, k, res_setup->books[j][k]);
777
if (k>res_setup->maxpass) {
778
res_setup->maxpass=k;
781
res_setup->books[j][k]=-1;
789
// Process mappings part
791
static int vorbis_parse_setup_hdr_mappings(vorbis_context *vc) {
792
GetBitContext *gb=&vc->gb;
795
vc->mapping_count=get_bits(gb, 6)+1;
796
vc->mappings=(vorbis_mapping *)av_mallocz(vc->mapping_count * sizeof(vorbis_mapping));
798
AV_DEBUG(" There are %d mappings. \n", vc->mapping_count);
800
for(i=0;i<vc->mapping_count;++i) {
801
vorbis_mapping *mapping_setup=&vc->mappings[i];
803
if (get_bits(gb, 16)) {
804
av_log(vc->avccontext, AV_LOG_ERROR, "Other mappings than type 0 are not compliant with the Vorbis I specification. \n");
808
mapping_setup->submaps=get_bits(gb, 4)+1;
810
mapping_setup->submaps=1;
814
mapping_setup->coupling_steps=get_bits(gb, 8)+1;
815
mapping_setup->magnitude=(uint_fast8_t *)av_mallocz(mapping_setup->coupling_steps * sizeof(uint_fast8_t));
816
mapping_setup->angle=(uint_fast8_t *)av_mallocz(mapping_setup->coupling_steps * sizeof(uint_fast8_t));
817
for(j=0;j<mapping_setup->coupling_steps;++j) {
818
mapping_setup->magnitude[j]=get_bits(gb, ilog(vc->audio_channels-1));
819
mapping_setup->angle[j]=get_bits(gb, ilog(vc->audio_channels-1));
820
// FIXME: sanity checks
823
mapping_setup->coupling_steps=0;
826
AV_DEBUG(" %d mapping coupling steps: %d \n", i, mapping_setup->coupling_steps);
828
if(get_bits(gb, 2)) {
829
av_log(vc->avccontext, AV_LOG_ERROR, "%d. mapping setup data invalid. \n", i);
830
return 1; // following spec.
833
if (mapping_setup->submaps>1) {
834
mapping_setup->mux=(uint_fast8_t *)av_mallocz(vc->audio_channels * sizeof(uint_fast8_t));
835
for(j=0;j<vc->audio_channels;++j) {
836
mapping_setup->mux[j]=get_bits(gb, 4);
840
for(j=0;j<mapping_setup->submaps;++j) {
841
get_bits(gb, 8); // FIXME check?
842
mapping_setup->submap_floor[j]=get_bits(gb, 8);
843
mapping_setup->submap_residue[j]=get_bits(gb, 8);
845
AV_DEBUG(" %d mapping %d submap : floor %d, residue %d \n", i, j, mapping_setup->submap_floor[j], mapping_setup->submap_residue[j]);
851
// Process modes part
853
static void create_map( vorbis_context * vc, uint_fast8_t floor_number )
855
vorbis_floor * floors=vc->floors;
858
int_fast8_t blockflag;
860
int_fast32_t n; //TODO: could theoretically be smaller?
862
for (blockflag=0;blockflag<2;++blockflag)
864
n=vc->blocksize[blockflag]/2;
865
floors[floor_number].data.t0.map[blockflag]=
866
av_malloc((n+1) * sizeof(int_fast32_t)); // n+sentinel
868
map=floors[floor_number].data.t0.map[blockflag];
869
vf=&floors[floor_number].data.t0;
871
for (idx=0; idx<n;++idx) {
872
map[idx]=floor( BARK((vf->rate*idx)/(2.0f*n)) *
873
((vf->bark_map_size)/
874
BARK(vf->rate/2.0f )) );
875
if (vf->bark_map_size-1 < map[idx]) {
876
map[idx]=vf->bark_map_size-1;
880
vf->map_size[blockflag]=n;
884
for(idx=0;idx<=n;++idx) {
885
AV_DEBUG("floor0 map: map at pos %d is %d\n",
891
static int vorbis_parse_setup_hdr_modes(vorbis_context *vc) {
892
GetBitContext *gb=&vc->gb;
895
vc->mode_count=get_bits(gb, 6)+1;
896
vc->modes=(vorbis_mode *)av_mallocz(vc->mode_count * sizeof(vorbis_mode));
898
AV_DEBUG(" There are %d modes.\n", vc->mode_count);
900
for(i=0;i<vc->mode_count;++i) {
901
vorbis_mode *mode_setup=&vc->modes[i];
903
mode_setup->blockflag=get_bits(gb, 1);
904
mode_setup->windowtype=get_bits(gb, 16); //FIXME check
905
mode_setup->transformtype=get_bits(gb, 16); //FIXME check
906
mode_setup->mapping=get_bits(gb, 8); //FIXME check
908
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);
913
// Process the whole setup header using the functions above
915
static int vorbis_parse_setup_hdr(vorbis_context *vc) {
916
GetBitContext *gb=&vc->gb;
918
if ((get_bits(gb, 8)!='v') || (get_bits(gb, 8)!='o') ||
919
(get_bits(gb, 8)!='r') || (get_bits(gb, 8)!='b') ||
920
(get_bits(gb, 8)!='i') || (get_bits(gb, 8)!='s')) {
921
av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (no vorbis signature). \n");
925
if (vorbis_parse_setup_hdr_codebooks(vc)) {
926
av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (codebooks). \n");
929
if (vorbis_parse_setup_hdr_tdtransforms(vc)) {
930
av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (time domain transforms). \n");
933
if (vorbis_parse_setup_hdr_floors(vc)) {
934
av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (floors). \n");
937
if (vorbis_parse_setup_hdr_residues(vc)) {
938
av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (residues). \n");
941
if (vorbis_parse_setup_hdr_mappings(vc)) {
942
av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (mappings). \n");
945
if (vorbis_parse_setup_hdr_modes(vc)) {
946
av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (modes). \n");
949
if (!get_bits1(gb)) {
950
av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (framing flag). \n");
951
return 8; // framing flag bit unset error
957
// Process the identification header
959
static int vorbis_parse_id_hdr(vorbis_context *vc){
960
GetBitContext *gb=&vc->gb;
961
uint_fast8_t bl0, bl1;
963
if ((get_bits(gb, 8)!='v') || (get_bits(gb, 8)!='o') ||
964
(get_bits(gb, 8)!='r') || (get_bits(gb, 8)!='b') ||
965
(get_bits(gb, 8)!='i') || (get_bits(gb, 8)!='s')) {
966
av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis id header packet corrupt (no vorbis signature). \n");
970
vc->version=get_bits_long(gb, 32); //FIXME check 0
971
vc->audio_channels=get_bits(gb, 8); //FIXME check >0
972
vc->audio_samplerate=get_bits_long(gb, 32); //FIXME check >0
973
vc->bitrate_maximum=get_bits_long(gb, 32);
974
vc->bitrate_nominal=get_bits_long(gb, 32);
975
vc->bitrate_minimum=get_bits_long(gb, 32);
978
vc->blocksize[0]=(1<<bl0);
979
vc->blocksize[1]=(1<<bl1);
980
if (bl0>13 || bl0<6 || bl1>13 || bl1<6 || bl1<bl0) {
981
av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis id header packet corrupt (illegal blocksize). \n");
984
// output format int16
985
if (vc->blocksize[1]/2 * vc->audio_channels * 2 >
986
AVCODEC_MAX_AUDIO_FRAME_SIZE) {
987
av_log(vc->avccontext, AV_LOG_ERROR, "Vorbis channel count makes "
988
"output packets too large.\n");
991
vc->win[0]=ff_vorbis_vwin[bl0-6];
992
vc->win[1]=ff_vorbis_vwin[bl1-6];
997
float *win = av_malloc(vc->blocksize[j]/2 * sizeof(float));
998
for(i=0; i<vc->blocksize[j]/2; i++)
999
win[i] = vc->win[j][i] * (1<<15);
1004
if ((get_bits1(gb)) == 0) {
1005
av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis id header packet corrupt (framing flag not set). \n");
1009
vc->channel_residues=(float *)av_malloc((vc->blocksize[1]/2)*vc->audio_channels * sizeof(float));
1010
vc->channel_floors=(float *)av_malloc((vc->blocksize[1]/2)*vc->audio_channels * sizeof(float));
1011
vc->saved=(float *)av_malloc((vc->blocksize[1]/2)*vc->audio_channels * sizeof(float));
1012
vc->ret=(float *)av_malloc((vc->blocksize[1]/2)*vc->audio_channels * sizeof(float));
1013
vc->buf=(float *)av_malloc(vc->blocksize[1] * sizeof(float));
1014
vc->buf_tmp=(float *)av_malloc(vc->blocksize[1] * sizeof(float));
1017
ff_mdct_init(&vc->mdct[0], bl0, 1);
1018
ff_mdct_init(&vc->mdct[1], bl1, 1);
1020
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 ",
1021
vc->version, vc->audio_channels, vc->audio_samplerate, vc->bitrate_maximum, vc->bitrate_nominal, vc->bitrate_minimum, vc->blocksize[0], vc->blocksize[1]);
1024
BLK=vc->blocksize[0];
1025
for(i=0;i<BLK/2;++i) {
1026
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)));
1033
// Process the extradata using the functions above (identification header, setup header)
1035
static int vorbis_decode_init(AVCodecContext *avccontext) {
1036
vorbis_context *vc = avccontext->priv_data ;
1037
uint8_t *headers = avccontext->extradata;
1038
int headers_len=avccontext->extradata_size;
1039
uint8_t *header_start[3];
1041
GetBitContext *gb = &(vc->gb);
1044
vc->avccontext = avccontext;
1045
dsputil_init(&vc->dsp, avccontext);
1047
if(vc->dsp.float_to_int16 == ff_float_to_int16_c) {
1052
vc->exp_bias = 15<<23;
1056
av_log(avccontext, AV_LOG_ERROR, "Extradata corrupt.\n");
1060
if(headers[0] == 0 && headers[1] == 30) {
1061
for(i = 0; i < 3; i++){
1062
header_len[i] = *headers++ << 8;
1063
header_len[i] += *headers++;
1064
header_start[i] = headers;
1065
headers += header_len[i];
1067
} else if(headers[0] == 2) {
1068
for(j=1,i=0;i<2;++i, ++j) {
1070
while(j<headers_len && headers[j]==0xff) {
1071
header_len[i]+=0xff;
1074
if (j>=headers_len) {
1075
av_log(avccontext, AV_LOG_ERROR, "Extradata corrupt.\n");
1078
header_len[i]+=headers[j];
1080
header_len[2]=headers_len-header_len[0]-header_len[1]-j;
1082
header_start[0] = headers;
1083
header_start[1] = header_start[0] + header_len[0];
1084
header_start[2] = header_start[1] + header_len[1];
1086
av_log(avccontext, AV_LOG_ERROR, "Extradata corrupt.\n");
1090
init_get_bits(gb, header_start[0], header_len[0]*8);
1091
hdr_type=get_bits(gb, 8);
1093
av_log(avccontext, AV_LOG_ERROR, "First header is not the id header.\n");
1096
if (vorbis_parse_id_hdr(vc)) {
1097
av_log(avccontext, AV_LOG_ERROR, "Id header corrupt.\n");
1102
init_get_bits(gb, header_start[2], header_len[2]*8);
1103
hdr_type=get_bits(gb, 8);
1105
av_log(avccontext, AV_LOG_ERROR, "Third header is not the setup header.\n");
1108
if (vorbis_parse_setup_hdr(vc)) {
1109
av_log(avccontext, AV_LOG_ERROR, "Setup header corrupt.\n");
1114
avccontext->channels = vc->audio_channels;
1115
avccontext->sample_rate = vc->audio_samplerate;
1120
// Decode audiopackets -------------------------------------------------
1122
// Read and decode floor
1124
static uint_fast8_t vorbis_floor0_decode(vorbis_context *vc,
1125
vorbis_floor_data *vfu, float *vec) {
1126
vorbis_floor0 * vf=&vfu->t0;
1127
float * lsp=vf->lsp;
1128
uint_fast32_t amplitude;
1129
uint_fast32_t book_idx;
1130
uint_fast8_t blockflag=vc->modes[vc->mode_number].blockflag;
1132
amplitude=get_bits(&vc->gb, vf->amplitude_bits);
1135
uint_fast16_t lsp_len = 0;
1137
vorbis_codebook codebook;
1139
book_idx=get_bits(&vc->gb, ilog(vf->num_books));
1140
if ( book_idx >= vf->num_books ) {
1141
av_log( vc->avccontext, AV_LOG_ERROR,
1142
"floor0 dec: booknumber too high!\n" );
1145
AV_DEBUG( "floor0 dec: booknumber: %u\n", book_idx );
1146
codebook=vc->codebooks[vf->book_list[book_idx]];
1148
while (lsp_len<vf->order) {
1151
AV_DEBUG( "floor0 dec: book dimension: %d\n", codebook.dimensions );
1152
AV_DEBUG( "floor0 dec: maximum depth: %d\n", codebook.maxdepth );
1153
/* read temp vector */
1154
vec_off=get_vlc2(&vc->gb,
1157
codebook.maxdepth ) *
1158
codebook.dimensions;
1159
AV_DEBUG( "floor0 dec: vector offset: %d\n", vec_off );
1160
/* copy each vector component and add last to it */
1161
for (idx=0; idx<codebook.dimensions; ++idx) {
1162
lsp[lsp_len+idx]=codebook.codevectors[vec_off+idx]+last;
1164
last=lsp[lsp_len+idx-1]; /* set last to last vector component */
1166
lsp_len += codebook.dimensions;
1169
/* DEBUG: output lsp coeffs */
1172
for ( idx = 0; idx < lsp_len; ++idx )
1173
AV_DEBUG("floor0 dec: coeff at %d is %f\n", idx, lsp[idx] );
1177
/* synthesize floor output vector */
1180
int order=vf->order;
1181
float wstep=M_PI/vf->bark_map_size;
1183
for(i=0;i<order;i++) { lsp[i]=2.0f*cos(lsp[i]); }
1185
AV_DEBUG("floor0 synth: map_size=%d; m=%d; wstep=%f\n",
1186
vf->map_size, order, wstep);
1189
while(i<vf->map_size[blockflag]) {
1190
int j, iter_cond=vf->map[blockflag][i];
1193
float two_cos_w=2.0f*cos(wstep*iter_cond); // needed all times
1195
/* similar part for the q and p products */
1196
for(j=0;j<order;j+=2) {
1197
q *= lsp[j] -two_cos_w;
1198
p *= lsp[j+1]-two_cos_w;
1200
if(j==order) { // even order
1201
p *= p*(2.0f-two_cos_w);
1202
q *= q*(2.0f+two_cos_w);
1205
q *= two_cos_w-lsp[j]; // one more time for q
1207
/* final step and square */
1208
p *= p*(4.f-two_cos_w*two_cos_w);
1212
/* calculate linear floor value */
1215
( (amplitude*vf->amplitude_offset)/
1216
(((1<<vf->amplitude_bits)-1) * sqrt(p+q)) )
1217
- vf->amplitude_offset ) * .11512925f
1222
do { vec[i]=q; ++i; }while(vf->map[blockflag][i]==iter_cond);
1227
/* this channel is unused */
1231
AV_DEBUG(" Floor0 decoded\n");
1236
static void render_line(int x0, int y0, int x1, int y1, float * buf, int n) {
1239
int ady = FFABS(dy);
1240
int base = dy / adx;
1245
if (dy < 0) sy = base - 1;
1247
ady = ady - FFABS(base) * adx;
1249
buf[x] = ff_vorbis_floor1_inverse_db_table[y];
1250
for (x = x0 + 1; x < x1; x++) {
1259
buf[x] = ff_vorbis_floor1_inverse_db_table[y];
1263
void ff_vorbis_floor1_render_list(floor1_entry_t * list, int values, uint_fast16_t * y_list, int * flag, int multiplier, float * out, int samples) {
1266
ly = y_list[0] * multiplier;
1267
for (i = 1; i < values; i++) {
1268
int pos = list[i].sort;
1270
render_line(lx, ly, list[pos].x, y_list[pos] * multiplier, out, samples);
1272
ly = y_list[pos] * multiplier;
1274
if (lx >= samples) break;
1276
if (lx < samples) render_line(lx, ly, samples, ly, out, samples);
1279
static uint_fast8_t vorbis_floor1_decode(vorbis_context *vc, vorbis_floor_data *vfu, float *vec) {
1280
vorbis_floor1 * vf=&vfu->t1;
1281
GetBitContext *gb=&vc->gb;
1282
uint_fast16_t range_v[4]={ 256, 128, 86, 64 };
1283
uint_fast16_t range=range_v[vf->multiplier-1];
1284
uint_fast16_t floor1_Y[vf->x_list_dim];
1285
uint_fast16_t floor1_Y_final[vf->x_list_dim];
1286
int floor1_flag[vf->x_list_dim];
1287
uint_fast8_t class_;
1293
uint_fast16_t offset;
1295
/*u*/int_fast16_t adx, ady, off, predicted; // WTF ? dy/adx= (unsigned)dy/adx ?
1296
int_fast16_t dy, err;
1299
if (!get_bits1(gb)) return 1; // silence
1301
// Read values (or differences) for the floor's points
1303
floor1_Y[0]=get_bits(gb, ilog(range-1));
1304
floor1_Y[1]=get_bits(gb, ilog(range-1));
1306
AV_DEBUG("floor 0 Y %d floor 1 Y %d \n", floor1_Y[0], floor1_Y[1]);
1309
for(i=0;i<vf->partitions;++i) {
1310
class_=vf->partition_class[i];
1311
cdim=vf->class_dimensions[class_];
1312
cbits=vf->class_subclasses[class_];
1316
AV_DEBUG("Cbits %d \n", cbits);
1318
if (cbits) { // this reads all subclasses for this partition's class
1319
cval=get_vlc2(gb, vc->codebooks[vf->class_masterbook[class_]].vlc.table,
1320
vc->codebooks[vf->class_masterbook[class_]].nb_bits, 3);
1323
for(j=0;j<cdim;++j) {
1324
book=vf->subclass_books[class_][cval & csub];
1326
AV_DEBUG("book %d Cbits %d cval %d bits:%d \n", book, cbits, cval, get_bits_count(gb));
1330
floor1_Y[offset+j]=get_vlc2(gb, vc->codebooks[book].vlc.table,
1331
vc->codebooks[book].nb_bits, 3);
1333
floor1_Y[offset+j]=0;
1336
AV_DEBUG(" floor(%d) = %d \n", vf->list[offset+j].x, floor1_Y[offset+j]);
1341
// Amplitude calculation from the differences
1345
floor1_Y_final[0]=floor1_Y[0];
1346
floor1_Y_final[1]=floor1_Y[1];
1348
for(i=2;i<vf->x_list_dim;++i) {
1349
uint_fast16_t val, highroom, lowroom, room;
1350
uint_fast16_t high_neigh_offs;
1351
uint_fast16_t low_neigh_offs;
1353
low_neigh_offs=vf->list[i].low;
1354
high_neigh_offs=vf->list[i].high;
1355
dy=floor1_Y_final[high_neigh_offs]-floor1_Y_final[low_neigh_offs]; // render_point begin
1356
adx=vf->list[high_neigh_offs].x-vf->list[low_neigh_offs].x;
1358
err=ady*(vf->list[i].x-vf->list[low_neigh_offs].x);
1359
off=(int16_t)err/(int16_t)adx;
1361
predicted=floor1_Y_final[low_neigh_offs]-off;
1363
predicted=floor1_Y_final[low_neigh_offs]+off;
1364
} // render_point end
1367
highroom=range-predicted;
1369
if (highroom < lowroom) {
1372
room=lowroom*2; // SPEC mispelling
1375
floor1_flag[low_neigh_offs]=1;
1376
floor1_flag[high_neigh_offs]=1;
1379
if (highroom > lowroom) {
1380
floor1_Y_final[i]=val-lowroom+predicted;
1382
floor1_Y_final[i]=predicted-val+highroom-1;
1386
floor1_Y_final[i]=predicted-(val+1)/2;
1388
floor1_Y_final[i]=predicted+val/2;
1393
floor1_Y_final[i]=predicted;
1396
AV_DEBUG(" Decoded floor(%d) = %d / val %d \n", vf->list[i].x, floor1_Y_final[i], val);
1399
// Curve synth - connect the calculated dots and convert from dB scale FIXME optimize ?
1401
ff_vorbis_floor1_render_list(vf->list, vf->x_list_dim, floor1_Y_final, floor1_flag, vf->multiplier, vec, vf->list[1].x);
1403
AV_DEBUG(" Floor decoded\n");
1408
// Read and decode residue
1410
static 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) {
1411
GetBitContext *gb=&vc->gb;
1412
uint_fast8_t c_p_c=vc->codebooks[vr->classbook].dimensions;
1413
uint_fast16_t n_to_read=vr->end-vr->begin;
1414
uint_fast16_t ptns_to_read=n_to_read/vr->partition_size;
1415
uint_fast8_t classifs[ptns_to_read*vc->audio_channels];
1417
uint_fast8_t ch_used;
1423
do_not_decode[0]&=do_not_decode[j]; // FIXME - clobbering input
1425
if (do_not_decode[0]) return 0;
1431
AV_DEBUG(" residue type 0/1/2 decode begin, ch: %d cpc %d \n", ch, c_p_c);
1433
for(pass=0;pass<=vr->maxpass;++pass) { // FIXME OPTIMIZE?
1434
uint_fast16_t voffset;
1435
uint_fast16_t partition_count;
1436
uint_fast16_t j_times_ptns_to_read;
1439
for(partition_count=0;partition_count<ptns_to_read;) { // SPEC error
1441
uint_fast32_t inverse_class = ff_inverse[vr->classifications];
1442
for(j_times_ptns_to_read=0, j=0;j<ch_used;++j) {
1443
if (!do_not_decode[j]) {
1444
uint_fast32_t temp=get_vlc2(gb, vc->codebooks[vr->classbook].vlc.table,
1445
vc->codebooks[vr->classbook].nb_bits, 3);
1447
AV_DEBUG("Classword: %d \n", temp);
1449
assert(vr->classifications > 1 && temp<=65536); //needed for inverse[]
1450
for(i=0;i<c_p_c;++i) {
1451
uint_fast32_t temp2;
1453
temp2=(((uint_fast64_t)temp) * inverse_class)>>32;
1454
if (partition_count+c_p_c-1-i < ptns_to_read) {
1455
classifs[j_times_ptns_to_read+partition_count+c_p_c-1-i]=temp-temp2*vr->classifications;
1460
j_times_ptns_to_read+=ptns_to_read;
1463
for(i=0;(i<c_p_c) && (partition_count<ptns_to_read);++i) {
1464
for(j_times_ptns_to_read=0, j=0;j<ch_used;++j) {
1465
uint_fast16_t voffs;
1467
if (!do_not_decode[j]) {
1468
uint_fast8_t vqclass=classifs[j_times_ptns_to_read+partition_count];
1469
int_fast16_t vqbook=vr->books[vqclass][pass];
1472
uint_fast16_t coffs;
1473
unsigned dim= vc->codebooks[vqbook].dimensions; // not uint_fast8_t: 64bit is slower here on amd64
1474
uint_fast16_t step= dim==1 ? vr->partition_size
1475
: FASTDIV(vr->partition_size, dim);
1476
vorbis_codebook codebook= vc->codebooks[vqbook];
1480
voffs=voffset+j*vlen;
1481
for(k=0;k<step;++k) {
1482
coffs=get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * dim;
1483
for(l=0;l<dim;++l) {
1484
vec[voffs+k+l*step]+=codebook.codevectors[coffs+l]; // FPMATH
1488
else if (vr->type==1) {
1489
voffs=voffset+j*vlen;
1490
for(k=0;k<step;++k) {
1491
coffs=get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * dim;
1492
for(l=0;l<dim;++l, ++voffs) {
1493
vec[voffs]+=codebook.codevectors[coffs+l]; // FPMATH
1495
AV_DEBUG(" pass %d offs: %d curr: %f change: %f cv offs.: %d \n", pass, voffs, vec[voffs], codebook.codevectors[coffs+l], coffs);
1499
else if (vr->type==2 && ch==2 && (voffset&1)==0 && (dim&1)==0) { // most frequent case optimized
1503
for(k=0;k<step;++k) {
1504
coffs=get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * 2;
1505
vec[voffs+k ]+=codebook.codevectors[coffs ]; // FPMATH
1506
vec[voffs+k+vlen]+=codebook.codevectors[coffs+1]; // FPMATH
1509
for(k=0;k<step;++k) {
1510
coffs=get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * dim;
1511
for(l=0;l<dim;l+=2, voffs++) {
1512
vec[voffs ]+=codebook.codevectors[coffs+l ]; // FPMATH
1513
vec[voffs+vlen]+=codebook.codevectors[coffs+l+1]; // FPMATH
1515
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);
1520
else if (vr->type==2) {
1523
for(k=0;k<step;++k) {
1524
coffs=get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * dim;
1525
for(l=0;l<dim;++l, ++voffs) {
1526
vec[voffs/ch+(voffs%ch)*vlen]+=codebook.codevectors[coffs+l]; // FPMATH FIXME use if and counter instead of / and %
1528
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);
1532
av_log(vc->avccontext, AV_LOG_ERROR, " Invalid residue type while residue decode?! \n");
1537
j_times_ptns_to_read+=ptns_to_read;
1540
voffset+=vr->partition_size;
1547
void vorbis_inverse_coupling(float *mag, float *ang, int blocksize)
1550
for(i=0; i<blocksize; i++)
1554
ang[i]=mag[i]-ang[i];
1572
// Decode the audio packet using the functions above
1574
static int vorbis_parse_audio_packet(vorbis_context *vc) {
1575
GetBitContext *gb=&vc->gb;
1577
uint_fast8_t previous_window=0,next_window=0;
1578
uint_fast8_t mode_number;
1579
uint_fast16_t blocksize;
1581
uint_fast8_t no_residue[vc->audio_channels];
1582
uint_fast8_t do_not_decode[vc->audio_channels];
1583
vorbis_mapping *mapping;
1584
float *ch_res_ptr=vc->channel_residues;
1585
float *ch_floor_ptr=vc->channel_floors;
1586
uint_fast8_t res_chan[vc->audio_channels];
1587
uint_fast8_t res_num=0;
1588
int_fast16_t retlen=0;
1589
uint_fast16_t saved_start=0;
1590
float fadd_bias = vc->add_bias;
1592
if (get_bits1(gb)) {
1593
av_log(vc->avccontext, AV_LOG_ERROR, "Not a Vorbis I audio packet.\n");
1594
return -1; // packet type not audio
1597
if (vc->mode_count==1) {
1600
mode_number=get_bits(gb, ilog(vc->mode_count-1));
1602
vc->mode_number=mode_number;
1603
mapping=&vc->mappings[vc->modes[mode_number].mapping];
1605
AV_DEBUG(" Mode number: %d , mapping: %d , blocktype %d \n", mode_number, vc->modes[mode_number].mapping, vc->modes[mode_number].blockflag);
1607
if (vc->modes[mode_number].blockflag) {
1608
previous_window=get_bits1(gb);
1609
next_window=get_bits1(gb);
1612
blocksize=vc->blocksize[vc->modes[mode_number].blockflag];
1613
memset(ch_res_ptr, 0, sizeof(float)*vc->audio_channels*blocksize/2); //FIXME can this be removed ?
1614
memset(ch_floor_ptr, 0, sizeof(float)*vc->audio_channels*blocksize/2); //FIXME can this be removed ?
1618
for(i=0;i<vc->audio_channels;++i) {
1619
vorbis_floor *floor;
1620
if (mapping->submaps>1) {
1621
floor=&vc->floors[mapping->submap_floor[mapping->mux[i]]];
1623
floor=&vc->floors[mapping->submap_floor[0]];
1626
no_residue[i]=floor->decode(vc, &floor->data, ch_floor_ptr);
1627
ch_floor_ptr+=blocksize/2;
1630
// Nonzero vector propagate
1632
for(i=mapping->coupling_steps-1;i>=0;--i) {
1633
if (!(no_residue[mapping->magnitude[i]] & no_residue[mapping->angle[i]])) {
1634
no_residue[mapping->magnitude[i]]=0;
1635
no_residue[mapping->angle[i]]=0;
1641
for(i=0;i<mapping->submaps;++i) {
1642
vorbis_residue *residue;
1645
for(j=0;j<vc->audio_channels;++j) {
1646
if ((mapping->submaps==1) || (i=mapping->mux[j])) {
1647
res_chan[j]=res_num;
1648
if (no_residue[j]) {
1649
do_not_decode[ch]=1;
1651
do_not_decode[ch]=0;
1657
residue=&vc->residues[mapping->submap_residue[i]];
1658
vorbis_residue_decode(vc, residue, ch, do_not_decode, ch_res_ptr, blocksize/2);
1660
ch_res_ptr+=ch*blocksize/2;
1665
for(i=mapping->coupling_steps-1;i>=0;--i) { //warning: i has to be signed
1668
mag=vc->channel_residues+res_chan[mapping->magnitude[i]]*blocksize/2;
1669
ang=vc->channel_residues+res_chan[mapping->angle[i]]*blocksize/2;
1670
vc->dsp.vorbis_inverse_coupling(mag, ang, blocksize/2);
1675
for(j=0, ch_floor_ptr=vc->channel_floors;j<vc->audio_channels;++j,ch_floor_ptr+=blocksize/2) {
1676
ch_res_ptr=vc->channel_residues+res_chan[j]*blocksize/2;
1677
vc->dsp.vector_fmul(ch_floor_ptr, ch_res_ptr, blocksize/2);
1680
// MDCT, overlap/add, save data for next overlapping FPMATH
1682
for(j=0;j<vc->audio_channels;++j) {
1683
uint_fast8_t step=vc->audio_channels;
1685
float *saved=vc->saved+j*vc->blocksize[1]/2;
1687
const float *lwin=vc->win[1];
1688
const float *swin=vc->win[0];
1690
float *buf_tmp=vc->buf_tmp;
1692
ch_floor_ptr=vc->channel_floors+j*blocksize/2;
1694
saved_start=vc->saved_start;
1696
vc->mdct[0].fft.imdct_calc(&vc->mdct[vc->modes[mode_number].blockflag], buf, ch_floor_ptr, buf_tmp);
1698
//FIXME process channels together, to allow faster simd vector_fmul_add_add?
1699
if (vc->modes[mode_number].blockflag) {
1701
if (previous_window) {
1702
vc->dsp.vector_fmul_add_add(ret+j, buf, lwin, saved, vc->add_bias, vc->blocksize[1]/2, step);
1703
retlen=vc->blocksize[1]/2;
1705
int len = (vc->blocksize[1]-vc->blocksize[0])/4;
1707
vc->dsp.vector_fmul_add_add(ret+j, buf, swin, saved, vc->add_bias, vc->blocksize[0]/2, step);
1708
k = vc->blocksize[0]/2*step + j;
1709
buf += vc->blocksize[0]/2;
1711
for(i=0; i<len; i++, k+=step)
1712
((uint32_t*)ret)[k] = ((uint32_t*)buf)[i] + vc->exp_bias; // ret[k]=buf[i]*(1<<bias)
1714
for(i=0; i<len; i++, k+=step)
1715
ret[k] = buf[i] + fadd_bias;
1718
retlen=vc->blocksize[0]/2+len;
1722
buf += vc->blocksize[1]/2;
1723
vc->dsp.vector_fmul_reverse(saved, buf, lwin, vc->blocksize[1]/2);
1726
saved_start=(vc->blocksize[1]-vc->blocksize[0])/4;
1727
buf += vc->blocksize[1]/2;
1728
for(i=0; i<saved_start; i++)
1729
((uint32_t*)saved)[i] = ((uint32_t*)buf)[i] + vc->exp_bias;
1730
vc->dsp.vector_fmul_reverse(saved+saved_start, buf+saved_start, swin, vc->blocksize[0]/2);
1735
for(k=j, i=0;i<saved_start;++i, k+=step)
1736
ret[k] = saved[i] + fadd_bias;
1738
for(k=j, i=0;i<saved_start;++i, k+=step)
1741
vc->dsp.vector_fmul_add_add(ret+k, buf, swin, saved+saved_start, vc->add_bias, vc->blocksize[0]/2, step);
1742
retlen=saved_start+vc->blocksize[0]/2;
1744
buf += vc->blocksize[0]/2;
1745
vc->dsp.vector_fmul_reverse(saved, buf, swin, vc->blocksize[0]/2);
1749
vc->saved_start=saved_start;
1751
return retlen*vc->audio_channels;
1754
// Return the decoded audio packet through the standard api
1756
static int vorbis_decode_frame(AVCodecContext *avccontext,
1757
void *data, int *data_size,
1758
uint8_t *buf, int buf_size)
1760
vorbis_context *vc = avccontext->priv_data ;
1761
GetBitContext *gb = &(vc->gb);
1769
AV_DEBUG("packet length %d \n", buf_size);
1771
init_get_bits(gb, buf, buf_size*8);
1773
len=vorbis_parse_audio_packet(vc);
1780
if (!vc->first_frame) {
1786
AV_DEBUG("parsed %d bytes %d bits, returned %d samples (*ch*bits) \n", get_bits_count(gb)/8, get_bits_count(gb)%8, len);
1788
vc->dsp.float_to_int16(data, vc->ret, len);
1796
static int vorbis_decode_close(AVCodecContext *avccontext) {
1797
vorbis_context *vc = avccontext->priv_data;
1804
AVCodec vorbis_decoder = {
1808
sizeof(vorbis_context),
1811
vorbis_decode_close,
1812
vorbis_decode_frame,