vorbisdec: replace div/mod in loop with a counter
[libav.git] / libavcodec / vorbisdec.c
CommitLineData
6168781f 1/*
2912e87a 2 * This file is part of Libav.
07c55d8e 3 *
2912e87a 4 * Libav is free software; you can redistribute it and/or
07c55d8e
AJ
5 * modify it under the terms of the GNU Lesser General Public
6 * License as published by the Free Software Foundation; either
7 * version 2.1 of the License, or (at your option) any later version.
8 *
2912e87a 9 * Libav is distributed in the hope that it will be useful,
07c55d8e
AJ
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Lesser General Public License for more details.
13 *
14 * You should have received a copy of the GNU Lesser General Public
2912e87a 15 * License along with Libav; if not, write to the Free Software
07c55d8e 16 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
07c55d8e
AJ
17 */
18
6168781f
DB
19/**
20 * @file
21 * Vorbis I decoder
22 * @author Denes Balatoni ( dbalatoni programozo hu )
23 */
24
2d9570a3 25#include <inttypes.h>
07c55d8e
AJ
26#include <math.h>
27
aaf47bcd 28#define BITSTREAM_READER_LE
d5a7229b 29#include "libavutil/float_dsp.h"
07c55d8e 30#include "avcodec.h"
9106a698 31#include "get_bits.h"
07c55d8e 32#include "dsputil.h"
1429224b 33#include "fft.h"
c73d99e6 34#include "fmtconvert.h"
07c55d8e
AJ
35
36#include "vorbis.h"
37#include "xiph.h"
38
39#define V_NB_BITS 8
40#define V_NB_BITS2 11
a7adcf29
DB
41#define V_MAX_VLCS (1 << 16)
42#define V_MAX_PARTITIONS (1 << 20)
07c55d8e 43
07c55d8e
AJ
44#undef NDEBUG
45#include <assert.h>
46
47typedef struct {
0a6b1a9f
DB
48 uint8_t dimensions;
49 uint8_t lookup_type;
50 uint8_t maxdepth;
51 VLC vlc;
52 float *codevectors;
07c55d8e
AJ
53 unsigned int nb_bits;
54} vorbis_codebook;
55
a7adcf29 56typedef union vorbis_floor_u vorbis_floor_data;
07c55d8e
AJ
57typedef struct vorbis_floor0_s vorbis_floor0;
58typedef struct vorbis_floor1_s vorbis_floor1;
59struct vorbis_context_s;
60typedef
3dde6675
JGG
61int (* vorbis_floor_decode_func)
62 (struct vorbis_context_s *, vorbis_floor_data *, float *);
07c55d8e 63typedef struct {
0a6b1a9f 64 uint8_t floor_type;
07c55d8e 65 vorbis_floor_decode_func decode;
5e56b30e
DB
66 union vorbis_floor_u {
67 struct vorbis_floor0_s {
0a6b1a9f
DB
68 uint8_t order;
69 uint16_t rate;
70 uint16_t bark_map_size;
71 int32_t *map[2];
72 uint32_t map_size[2];
73 uint8_t amplitude_bits;
74 uint8_t amplitude_offset;
75 uint8_t num_books;
76 uint8_t *book_list;
a7adcf29 77 float *lsp;
07c55d8e 78 } t0;
5e56b30e 79 struct vorbis_floor1_s {
0a6b1a9f
DB
80 uint8_t partitions;
81 uint8_t partition_class[32];
82 uint8_t class_dimensions[16];
83 uint8_t class_subclasses[16];
84 uint8_t class_masterbook[16];
85 int16_t subclass_books[16][8];
86 uint8_t multiplier;
87 uint16_t x_list_dim;
a7adcf29 88 vorbis_floor1_entry *list;
07c55d8e
AJ
89 } t1;
90 } data;
91} vorbis_floor;
92
93typedef struct {
0a6b1a9f
DB
94 uint16_t type;
95 uint32_t begin;
96 uint32_t end;
c934562c 97 unsigned partition_size;
0a6b1a9f
DB
98 uint8_t classifications;
99 uint8_t classbook;
100 int16_t books[64][8];
101 uint8_t maxpass;
102 uint16_t ptns_to_read;
103 uint8_t *classifs;
07c55d8e
AJ
104} vorbis_residue;
105
106typedef struct {
0a6b1a9f
DB
107 uint8_t submaps;
108 uint16_t coupling_steps;
109 uint8_t *magnitude;
110 uint8_t *angle;
111 uint8_t *mux;
112 uint8_t submap_floor[16];
113 uint8_t submap_residue[16];
07c55d8e
AJ
114} vorbis_mapping;
115
116typedef struct {
0a6b1a9f
DB
117 uint8_t blockflag;
118 uint16_t windowtype;
119 uint16_t transformtype;
120 uint8_t mapping;
07c55d8e
AJ
121} vorbis_mode;
122
123typedef struct vorbis_context_s {
124 AVCodecContext *avccontext;
0eea2129 125 AVFrame frame;
07c55d8e
AJ
126 GetBitContext gb;
127 DSPContext dsp;
d5a7229b 128 AVFloatDSPContext fdsp;
c73d99e6 129 FmtConvertContext fmt_conv;
07c55d8e 130
01b22147 131 FFTContext mdct[2];
0a6b1a9f
DB
132 uint8_t first_frame;
133 uint32_t version;
134 uint8_t audio_channels;
135 uint32_t audio_samplerate;
136 uint32_t bitrate_maximum;
137 uint32_t bitrate_nominal;
138 uint32_t bitrate_minimum;
139 uint32_t blocksize[2];
a7adcf29 140 const float *win[2];
0a6b1a9f 141 uint16_t codebook_count;
07c55d8e 142 vorbis_codebook *codebooks;
0a6b1a9f 143 uint8_t floor_count;
07c55d8e 144 vorbis_floor *floors;
0a6b1a9f 145 uint8_t residue_count;
07c55d8e 146 vorbis_residue *residues;
0a6b1a9f 147 uint8_t mapping_count;
07c55d8e 148 vorbis_mapping *mappings;
0a6b1a9f 149 uint8_t mode_count;
a7adcf29 150 vorbis_mode *modes;
0a6b1a9f
DB
151 uint8_t mode_number; // mode number for the current packet
152 uint8_t previous_window;
a7adcf29
DB
153 float *channel_residues;
154 float *channel_floors;
155 float *saved;
9d06d7bc 156 float scale_bias; // for float->int conversion
07c55d8e
AJ
157} vorbis_context;
158
159/* Helper functions */
160
161#define BARK(x) \
a7adcf29 162 (13.1f * atan(0.00074f * (x)) + 2.24f * atan(1.85e-8f * (x) * (x)) + 1e-4f * (x))
07c55d8e 163
7a41027c
RD
164static const char idx_err_str[] = "Index value %d out of range (0 - %d) for %s at %s:%i\n";
165#define VALIDATE_INDEX(idx, limit) \
166 if (idx >= limit) {\
167 av_log(vc->avccontext, AV_LOG_ERROR,\
168 idx_err_str,\
169 (int)(idx), (int)(limit - 1), #idx, __FILE__, __LINE__);\
f666276f 170 return AVERROR_INVALIDDATA;\
7a41027c
RD
171 }
172#define GET_VALIDATED_INDEX(idx, bits, limit) \
173 {\
174 idx = get_bits(gb, bits);\
175 VALIDATE_INDEX(idx, limit)\
176 }
177
cf3ac543 178static float vorbisfloat2float(unsigned val)
5e56b30e 179{
a7adcf29
DB
180 double mant = val & 0x1fffff;
181 long exp = (val & 0x7fe00000L) >> 21;
182 if (val & 0x80000000)
183 mant = -mant;
a5c0969a 184 return ldexp(mant, exp - 20 - 768);
07c55d8e
AJ
185}
186
187
188// Free all allocated memory -----------------------------------------
189
5e56b30e
DB
190static void vorbis_free(vorbis_context *vc)
191{
cf3ac543 192 int i;
07c55d8e
AJ
193
194 av_freep(&vc->channel_residues);
195 av_freep(&vc->channel_floors);
196 av_freep(&vc->saved);
07c55d8e 197
3c35da2f
MR
198 for (i = 0; i < vc->residue_count; i++)
199 av_free(vc->residues[i].classifs);
07c55d8e
AJ
200 av_freep(&vc->residues);
201 av_freep(&vc->modes);
202
203 ff_mdct_end(&vc->mdct[0]);
204 ff_mdct_end(&vc->mdct[1]);
205
a7adcf29 206 for (i = 0; i < vc->codebook_count; ++i) {
07c55d8e 207 av_free(vc->codebooks[i].codevectors);
e96b4a53 208 ff_free_vlc(&vc->codebooks[i].vlc);
07c55d8e
AJ
209 }
210 av_freep(&vc->codebooks);
211
a7adcf29
DB
212 for (i = 0; i < vc->floor_count; ++i) {
213 if (vc->floors[i].floor_type == 0) {
07c55d8e
AJ
214 av_free(vc->floors[i].data.t0.map[0]);
215 av_free(vc->floors[i].data.t0.map[1]);
216 av_free(vc->floors[i].data.t0.book_list);
217 av_free(vc->floors[i].data.t0.lsp);
5e56b30e 218 } else {
07c55d8e
AJ
219 av_free(vc->floors[i].data.t1.list);
220 }
221 }
222 av_freep(&vc->floors);
223
a7adcf29 224 for (i = 0; i < vc->mapping_count; ++i) {
07c55d8e
AJ
225 av_free(vc->mappings[i].magnitude);
226 av_free(vc->mappings[i].angle);
227 av_free(vc->mappings[i].mux);
228 }
229 av_freep(&vc->mappings);
07c55d8e
AJ
230}
231
232// Parse setup header -------------------------------------------------
233
234// Process codebooks part
235
5e56b30e
DB
236static int vorbis_parse_setup_hdr_codebooks(vorbis_context *vc)
237{
cf3ac543 238 unsigned cb;
a7adcf29 239 uint8_t *tmp_vlc_bits;
07c55d8e 240 uint32_t *tmp_vlc_codes;
a7adcf29 241 GetBitContext *gb = &vc->gb;
0a6b1a9f 242 uint16_t *codebook_multiplicands;
f666276f 243 int ret = 0;
07c55d8e 244
a7adcf29 245 vc->codebook_count = get_bits(gb, 8) + 1;
07c55d8e 246
df96f22d 247 av_dlog(NULL, " Codebooks: %d \n", vc->codebook_count);
07c55d8e 248
d1be646e
DB
249 vc->codebooks = av_mallocz(vc->codebook_count * sizeof(*vc->codebooks));
250 tmp_vlc_bits = av_mallocz(V_MAX_VLCS * sizeof(*tmp_vlc_bits));
251 tmp_vlc_codes = av_mallocz(V_MAX_VLCS * sizeof(*tmp_vlc_codes));
3c35da2f 252 codebook_multiplicands = av_malloc(V_MAX_VLCS * sizeof(*codebook_multiplicands));
07c55d8e 253
a7adcf29
DB
254 for (cb = 0; cb < vc->codebook_count; ++cb) {
255 vorbis_codebook *codebook_setup = &vc->codebooks[cb];
cf3ac543 256 unsigned ordered, t, entries, used_entries = 0;
07c55d8e 257
df96f22d 258 av_dlog(NULL, " %u. Codebook\n", cb);
07c55d8e 259
a7adcf29 260 if (get_bits(gb, 24) != 0x564342) {
cf3ac543
DB
261 av_log(vc->avccontext, AV_LOG_ERROR,
262 " %u. Codebook setup data corrupt.\n", cb);
f666276f 263 ret = AVERROR_INVALIDDATA;
07c55d8e
AJ
264 goto error;
265 }
266
267 codebook_setup->dimensions=get_bits(gb, 16);
a7adcf29 268 if (codebook_setup->dimensions > 16 || codebook_setup->dimensions == 0) {
cf3ac543
DB
269 av_log(vc->avccontext, AV_LOG_ERROR,
270 " %u. Codebook's dimension is invalid (%d).\n",
271 cb, codebook_setup->dimensions);
f666276f 272 ret = AVERROR_INVALIDDATA;
07c55d8e
AJ
273 goto error;
274 }
a7adcf29
DB
275 entries = get_bits(gb, 24);
276 if (entries > V_MAX_VLCS) {
cf3ac543
DB
277 av_log(vc->avccontext, AV_LOG_ERROR,
278 " %u. Codebook has too many entries (%u).\n",
279 cb, entries);
f666276f 280 ret = AVERROR_INVALIDDATA;
07c55d8e
AJ
281 goto error;
282 }
283
a7adcf29 284 ordered = get_bits1(gb);
07c55d8e 285
df96f22d
DB
286 av_dlog(NULL, " codebook_dimensions %d, codebook_entries %u\n",
287 codebook_setup->dimensions, entries);
07c55d8e
AJ
288
289 if (!ordered) {
cf3ac543
DB
290 unsigned ce, flag;
291 unsigned sparse = get_bits1(gb);
07c55d8e 292
df96f22d 293 av_dlog(NULL, " not ordered \n");
07c55d8e
AJ
294
295 if (sparse) {
df96f22d 296 av_dlog(NULL, " sparse \n");
07c55d8e 297
a7adcf29
DB
298 used_entries = 0;
299 for (ce = 0; ce < entries; ++ce) {
300 flag = get_bits1(gb);
07c55d8e 301 if (flag) {
a7adcf29 302 tmp_vlc_bits[ce] = get_bits(gb, 5) + 1;
07c55d8e 303 ++used_entries;
5e56b30e 304 } else
a7adcf29 305 tmp_vlc_bits[ce] = 0;
07c55d8e
AJ
306 }
307 } else {
df96f22d 308 av_dlog(NULL, " not sparse \n");
07c55d8e 309
a7adcf29
DB
310 used_entries = entries;
311 for (ce = 0; ce < entries; ++ce)
312 tmp_vlc_bits[ce] = get_bits(gb, 5) + 1;
07c55d8e
AJ
313 }
314 } else {
cf3ac543
DB
315 unsigned current_entry = 0;
316 unsigned current_length = get_bits(gb, 5) + 1;
07c55d8e 317
df96f22d 318 av_dlog(NULL, " ordered, current length: %u\n", current_length); //FIXME
07c55d8e 319
a7adcf29
DB
320 used_entries = entries;
321 for (; current_entry < used_entries && current_length <= 32; ++current_length) {
cf3ac543 322 unsigned i, number;
07c55d8e 323
df96f22d 324 av_dlog(NULL, " number bits: %u ", ilog(entries - current_entry));
07c55d8e 325
a7adcf29 326 number = get_bits(gb, ilog(entries - current_entry));
07c55d8e 327
df96f22d 328 av_dlog(NULL, " number: %u\n", number);
07c55d8e 329
a7adcf29
DB
330 for (i = current_entry; i < number+current_entry; ++i)
331 if (i < used_entries)
332 tmp_vlc_bits[i] = current_length;
07c55d8e
AJ
333
334 current_entry+=number;
335 }
336 if (current_entry>used_entries) {
337 av_log(vc->avccontext, AV_LOG_ERROR, " More codelengths than codes in codebook. \n");
f666276f 338 ret = AVERROR_INVALIDDATA;
07c55d8e
AJ
339 goto error;
340 }
341 }
342
a7adcf29 343 codebook_setup->lookup_type = get_bits(gb, 4);
07c55d8e 344
df96f22d
DB
345 av_dlog(NULL, " lookup type: %d : %s \n", codebook_setup->lookup_type,
346 codebook_setup->lookup_type ? "vq" : "no lookup");
07c55d8e
AJ
347
348// If the codebook is used for (inverse) VQ, calculate codevectors.
349
a7adcf29 350 if (codebook_setup->lookup_type == 1) {
cf3ac543
DB
351 unsigned i, j, k;
352 unsigned codebook_lookup_values = ff_vorbis_nth_root(entries, codebook_setup->dimensions);
07c55d8e 353
a7adcf29
DB
354 float codebook_minimum_value = vorbisfloat2float(get_bits_long(gb, 32));
355 float codebook_delta_value = vorbisfloat2float(get_bits_long(gb, 32));
cf3ac543
DB
356 unsigned codebook_value_bits = get_bits(gb, 4) + 1;
357 unsigned codebook_sequence_p = get_bits1(gb);
07c55d8e 358
df96f22d
DB
359 av_dlog(NULL, " We expect %d numbers for building the codevectors. \n",
360 codebook_lookup_values);
361 av_dlog(NULL, " delta %f minmum %f \n",
362 codebook_delta_value, codebook_minimum_value);
07c55d8e 363
a7adcf29
DB
364 for (i = 0; i < codebook_lookup_values; ++i) {
365 codebook_multiplicands[i] = get_bits(gb, codebook_value_bits);
07c55d8e 366
df96f22d
DB
367 av_dlog(NULL, " multiplicands*delta+minmum : %e \n",
368 (float)codebook_multiplicands[i] * codebook_delta_value + codebook_minimum_value);
369 av_dlog(NULL, " multiplicand %u\n", codebook_multiplicands[i]);
07c55d8e
AJ
370 }
371
372// Weed out unused vlcs and build codevector vector
d1be646e
DB
373 codebook_setup->codevectors = used_entries ? av_mallocz(used_entries *
374 codebook_setup->dimensions *
375 sizeof(*codebook_setup->codevectors))
376 : NULL;
a7adcf29 377 for (j = 0, i = 0; i < entries; ++i) {
cf3ac543 378 unsigned dim = codebook_setup->dimensions;
07c55d8e
AJ
379
380 if (tmp_vlc_bits[i]) {
a7adcf29 381 float last = 0.0;
cf3ac543 382 unsigned lookup_offset = i;
07c55d8e 383
23664624 384 av_dlog(vc->avccontext, "Lookup offset %u ,", i);
07c55d8e 385
a7adcf29 386 for (k = 0; k < dim; ++k) {
cf3ac543 387 unsigned multiplicand_offset = lookup_offset % codebook_lookup_values;
a7adcf29 388 codebook_setup->codevectors[j * dim + k] = codebook_multiplicands[multiplicand_offset] * codebook_delta_value + codebook_minimum_value + last;
5e56b30e 389 if (codebook_sequence_p)
a7adcf29 390 last = codebook_setup->codevectors[j * dim + k];
07c55d8e
AJ
391 lookup_offset/=codebook_lookup_values;
392 }
a7adcf29 393 tmp_vlc_bits[j] = tmp_vlc_bits[i];
07c55d8e 394
23664624 395 av_dlog(vc->avccontext, "real lookup offset %u, vector: ", j);
a7adcf29 396 for (k = 0; k < dim; ++k)
23664624
DB
397 av_dlog(vc->avccontext, " %f ",
398 codebook_setup->codevectors[j * dim + k]);
399 av_dlog(vc->avccontext, "\n");
07c55d8e
AJ
400
401 ++j;
402 }
403 }
a7adcf29 404 if (j != used_entries) {
07c55d8e 405 av_log(vc->avccontext, AV_LOG_ERROR, "Bug in codevector vector building code. \n");
f666276f 406 ret = AVERROR_INVALIDDATA;
07c55d8e
AJ
407 goto error;
408 }
a7adcf29
DB
409 entries = used_entries;
410 } else if (codebook_setup->lookup_type >= 2) {
07c55d8e 411 av_log(vc->avccontext, AV_LOG_ERROR, "Codebook lookup type not supported. \n");
f666276f 412 ret = AVERROR_INVALIDDATA;
07c55d8e
AJ
413 goto error;
414 }
415
416// Initialize VLC table
417 if (ff_vorbis_len2vlc(tmp_vlc_bits, tmp_vlc_codes, entries)) {
418 av_log(vc->avccontext, AV_LOG_ERROR, " Invalid code lengths while generating vlcs. \n");
f666276f 419 ret = AVERROR_INVALIDDATA;
07c55d8e
AJ
420 goto error;
421 }
a7adcf29
DB
422 codebook_setup->maxdepth = 0;
423 for (t = 0; t < entries; ++t)
424 if (tmp_vlc_bits[t] >= codebook_setup->maxdepth)
425 codebook_setup->maxdepth = tmp_vlc_bits[t];
07c55d8e 426
a7adcf29
DB
427 if (codebook_setup->maxdepth > 3 * V_NB_BITS)
428 codebook_setup->nb_bits = V_NB_BITS2;
5e56b30e 429 else
a7adcf29 430 codebook_setup->nb_bits = V_NB_BITS;
07c55d8e 431
a7adcf29 432 codebook_setup->maxdepth = (codebook_setup->maxdepth+codebook_setup->nb_bits - 1) / codebook_setup->nb_bits;
07c55d8e 433
f666276f
JR
434 if ((ret = init_vlc(&codebook_setup->vlc, codebook_setup->nb_bits,
435 entries, tmp_vlc_bits, sizeof(*tmp_vlc_bits),
436 sizeof(*tmp_vlc_bits), tmp_vlc_codes,
437 sizeof(*tmp_vlc_codes), sizeof(*tmp_vlc_codes),
438 INIT_VLC_LE))) {
07c55d8e
AJ
439 av_log(vc->avccontext, AV_LOG_ERROR, " Error generating vlc tables. \n");
440 goto error;
441 }
442 }
443
444 av_free(tmp_vlc_bits);
445 av_free(tmp_vlc_codes);
3c35da2f 446 av_free(codebook_multiplicands);
07c55d8e
AJ
447 return 0;
448
449// Error:
450error:
451 av_free(tmp_vlc_bits);
452 av_free(tmp_vlc_codes);
3c35da2f 453 av_free(codebook_multiplicands);
f666276f 454 return ret;
07c55d8e
AJ
455}
456
457// Process time domain transforms part (unused in Vorbis I)
458
5e56b30e
DB
459static int vorbis_parse_setup_hdr_tdtransforms(vorbis_context *vc)
460{
a7adcf29 461 GetBitContext *gb = &vc->gb;
cf3ac543 462 unsigned i, vorbis_time_count = get_bits(gb, 6) + 1;
07c55d8e 463
a7adcf29 464 for (i = 0; i < vorbis_time_count; ++i) {
cf3ac543 465 unsigned vorbis_tdtransform = get_bits(gb, 16);
07c55d8e 466
df96f22d
DB
467 av_dlog(NULL, " Vorbis time domain transform %u: %u\n",
468 vorbis_time_count, vorbis_tdtransform);
07c55d8e
AJ
469
470 if (vorbis_tdtransform) {
471 av_log(vc->avccontext, AV_LOG_ERROR, "Vorbis time domain transform data nonzero. \n");
f666276f 472 return AVERROR_INVALIDDATA;
07c55d8e
AJ
473 }
474 }
475 return 0;
476}
477
478// Process floors part
479
3dde6675
JGG
480static int vorbis_floor0_decode(vorbis_context *vc,
481 vorbis_floor_data *vfu, float *vec);
cf3ac543 482static void create_map(vorbis_context *vc, unsigned floor_number);
3dde6675
JGG
483static int vorbis_floor1_decode(vorbis_context *vc,
484 vorbis_floor_data *vfu, float *vec);
5e56b30e
DB
485static int vorbis_parse_setup_hdr_floors(vorbis_context *vc)
486{
a7adcf29 487 GetBitContext *gb = &vc->gb;
c740f737 488 int i,j,k;
07c55d8e 489
a7adcf29 490 vc->floor_count = get_bits(gb, 6) + 1;
07c55d8e 491
d1be646e 492 vc->floors = av_mallocz(vc->floor_count * sizeof(*vc->floors));
07c55d8e 493
a7adcf29
DB
494 for (i = 0; i < vc->floor_count; ++i) {
495 vorbis_floor *floor_setup = &vc->floors[i];
07c55d8e 496
a7adcf29 497 floor_setup->floor_type = get_bits(gb, 16);
07c55d8e 498
df96f22d 499 av_dlog(NULL, " %d. floor type %d \n", i, floor_setup->floor_type);
07c55d8e 500
a7adcf29 501 if (floor_setup->floor_type == 1) {
54fdf5d1 502 int maximum_class = -1;
cf3ac543 503 unsigned rangebits, rangemax, floor1_values = 2;
07c55d8e 504
a7adcf29 505 floor_setup->decode = vorbis_floor1_decode;
07c55d8e 506
a7adcf29 507 floor_setup->data.t1.partitions = get_bits(gb, 5);
07c55d8e 508
df96f22d
DB
509 av_dlog(NULL, " %d.floor: %d partitions \n",
510 i, floor_setup->data.t1.partitions);
07c55d8e 511
a7adcf29
DB
512 for (j = 0; j < floor_setup->data.t1.partitions; ++j) {
513 floor_setup->data.t1.partition_class[j] = get_bits(gb, 4);
514 if (floor_setup->data.t1.partition_class[j] > maximum_class)
515 maximum_class = floor_setup->data.t1.partition_class[j];
07c55d8e 516
df96f22d
DB
517 av_dlog(NULL, " %d. floor %d partition class %d \n",
518 i, j, floor_setup->data.t1.partition_class[j]);
07c55d8e
AJ
519
520 }
521
df96f22d 522 av_dlog(NULL, " maximum class %d \n", maximum_class);
07c55d8e 523
a7adcf29
DB
524 for (j = 0; j <= maximum_class; ++j) {
525 floor_setup->data.t1.class_dimensions[j] = get_bits(gb, 3) + 1;
526 floor_setup->data.t1.class_subclasses[j] = get_bits(gb, 2);
07c55d8e 527
df96f22d
DB
528 av_dlog(NULL, " %d floor %d class dim: %d subclasses %d \n", i, j,
529 floor_setup->data.t1.class_dimensions[j],
530 floor_setup->data.t1.class_subclasses[j]);
07c55d8e
AJ
531
532 if (floor_setup->data.t1.class_subclasses[j]) {
7a41027c 533 GET_VALIDATED_INDEX(floor_setup->data.t1.class_masterbook[j], 8, vc->codebook_count)
07c55d8e 534
df96f22d 535 av_dlog(NULL, " masterbook: %d \n", floor_setup->data.t1.class_masterbook[j]);
07c55d8e
AJ
536 }
537
a7adcf29
DB
538 for (k = 0; k < (1 << floor_setup->data.t1.class_subclasses[j]); ++k) {
539 int16_t bits = get_bits(gb, 8) - 1;
7a41027c
RD
540 if (bits != -1)
541 VALIDATE_INDEX(bits, vc->codebook_count)
a7adcf29 542 floor_setup->data.t1.subclass_books[j][k] = bits;
07c55d8e 543
df96f22d 544 av_dlog(NULL, " book %d. : %d \n", k, floor_setup->data.t1.subclass_books[j][k]);
07c55d8e
AJ
545 }
546 }
547
a7adcf29
DB
548 floor_setup->data.t1.multiplier = get_bits(gb, 2) + 1;
549 floor_setup->data.t1.x_list_dim = 2;
07c55d8e 550
a7adcf29 551 for (j = 0; j < floor_setup->data.t1.partitions; ++j)
07c55d8e 552 floor_setup->data.t1.x_list_dim+=floor_setup->data.t1.class_dimensions[floor_setup->data.t1.partition_class[j]];
07c55d8e 553
d1be646e
DB
554 floor_setup->data.t1.list = av_mallocz(floor_setup->data.t1.x_list_dim *
555 sizeof(*floor_setup->data.t1.list));
07c55d8e
AJ
556
557
a7adcf29 558 rangebits = get_bits(gb, 4);
13184036
FB
559 rangemax = (1 << rangebits);
560 if (rangemax > vc->blocksize[1] / 2) {
561 av_log(vc->avccontext, AV_LOG_ERROR,
0a6b1a9f 562 "Floor value is too large for blocksize: %u (%"PRIu32")\n",
13184036 563 rangemax, vc->blocksize[1] / 2);
f666276f 564 return AVERROR_INVALIDDATA;
13184036 565 }
07c55d8e 566 floor_setup->data.t1.list[0].x = 0;
13184036 567 floor_setup->data.t1.list[1].x = rangemax;
07c55d8e 568
a7adcf29
DB
569 for (j = 0; j < floor_setup->data.t1.partitions; ++j) {
570 for (k = 0; k < floor_setup->data.t1.class_dimensions[floor_setup->data.t1.partition_class[j]]; ++k, ++floor1_values) {
571 floor_setup->data.t1.list[floor1_values].x = get_bits(gb, rangebits);
07c55d8e 572
df96f22d
DB
573 av_dlog(NULL, " %u. floor1 Y coord. %d\n", floor1_values,
574 floor_setup->data.t1.list[floor1_values].x);
07c55d8e
AJ
575 }
576 }
577
578// Precalculate order of x coordinates - needed for decode
ecf79c4d
AC
579 if (ff_vorbis_ready_floor1_list(vc->avccontext,
580 floor_setup->data.t1.list,
581 floor_setup->data.t1.x_list_dim)) {
582 return AVERROR_INVALIDDATA;
583 }
a7adcf29 584 } else if (floor_setup->floor_type == 0) {
cf3ac543 585 unsigned max_codebook_dim = 0;
07c55d8e 586
a7adcf29 587 floor_setup->decode = vorbis_floor0_decode;
07c55d8e 588
a7adcf29
DB
589 floor_setup->data.t0.order = get_bits(gb, 8);
590 floor_setup->data.t0.rate = get_bits(gb, 16);
591 floor_setup->data.t0.bark_map_size = get_bits(gb, 16);
592 floor_setup->data.t0.amplitude_bits = get_bits(gb, 6);
07c55d8e
AJ
593 /* zero would result in a div by zero later *
594 * 2^0 - 1 == 0 */
595 if (floor_setup->data.t0.amplitude_bits == 0) {
4f03c5d7
AS
596 av_log(vc->avccontext, AV_LOG_ERROR,
597 "Floor 0 amplitude bits is 0.\n");
f666276f 598 return AVERROR_INVALIDDATA;
07c55d8e 599 }
a7adcf29
DB
600 floor_setup->data.t0.amplitude_offset = get_bits(gb, 8);
601 floor_setup->data.t0.num_books = get_bits(gb, 4) + 1;
07c55d8e
AJ
602
603 /* allocate mem for booklist */
a7adcf29 604 floor_setup->data.t0.book_list =
07c55d8e 605 av_malloc(floor_setup->data.t0.num_books);
a7adcf29 606 if (!floor_setup->data.t0.book_list)
f666276f 607 return AVERROR(ENOMEM);
07c55d8e
AJ
608 /* read book indexes */
609 {
610 int idx;
cf3ac543 611 unsigned book_idx;
a7adcf29 612 for (idx = 0; idx < floor_setup->data.t0.num_books; ++idx) {
961b0c41
RD
613 GET_VALIDATED_INDEX(book_idx, 8, vc->codebook_count)
614 floor_setup->data.t0.book_list[idx] = book_idx;
07c55d8e 615 if (vc->codebooks[book_idx].dimensions > max_codebook_dim)
a7adcf29 616 max_codebook_dim = vc->codebooks[book_idx].dimensions;
07c55d8e
AJ
617 }
618 }
619
a7adcf29 620 create_map(vc, i);
07c55d8e 621
07f06540
AS
622 /* codebook dim is for padding if codebook dim doesn't *
623 * divide order+1 then we need to read more data */
624 floor_setup->data.t0.lsp =
d1be646e
DB
625 av_malloc((floor_setup->data.t0.order + 1 + max_codebook_dim)
626 * sizeof(*floor_setup->data.t0.lsp));
07f06540 627 if (!floor_setup->data.t0.lsp)
f666276f 628 return AVERROR(ENOMEM);
07c55d8e 629
df96f22d
DB
630 /* debug output parsed headers */
631 av_dlog(NULL, "floor0 order: %u\n", floor_setup->data.t0.order);
632 av_dlog(NULL, "floor0 rate: %u\n", floor_setup->data.t0.rate);
633 av_dlog(NULL, "floor0 bark map size: %u\n",
634 floor_setup->data.t0.bark_map_size);
635 av_dlog(NULL, "floor0 amplitude bits: %u\n",
636 floor_setup->data.t0.amplitude_bits);
637 av_dlog(NULL, "floor0 amplitude offset: %u\n",
638 floor_setup->data.t0.amplitude_offset);
639 av_dlog(NULL, "floor0 number of books: %u\n",
640 floor_setup->data.t0.num_books);
641 av_dlog(NULL, "floor0 book list pointer: %p\n",
642 floor_setup->data.t0.book_list);
07c55d8e 643 {
4f03c5d7
AS
644 int idx;
645 for (idx = 0; idx < floor_setup->data.t0.num_books; ++idx) {
df96f22d
DB
646 av_dlog(NULL, " Book %d: %u\n", idx + 1,
647 floor_setup->data.t0.book_list[idx]);
4f03c5d7 648 }
07c55d8e 649 }
5e56b30e 650 } else {
07c55d8e 651 av_log(vc->avccontext, AV_LOG_ERROR, "Invalid floor type!\n");
f666276f 652 return AVERROR_INVALIDDATA;
07c55d8e
AJ
653 }
654 }
655 return 0;
656}
657
658// Process residues part
659
5e56b30e
DB
660static int vorbis_parse_setup_hdr_residues(vorbis_context *vc)
661{
a7adcf29 662 GetBitContext *gb = &vc->gb;
cf3ac543 663 unsigned i, j, k;
07c55d8e 664
a7adcf29 665 vc->residue_count = get_bits(gb, 6)+1;
d1be646e 666 vc->residues = av_mallocz(vc->residue_count * sizeof(*vc->residues));
07c55d8e 667
df96f22d 668 av_dlog(NULL, " There are %d residues. \n", vc->residue_count);
07c55d8e 669
a7adcf29
DB
670 for (i = 0; i < vc->residue_count; ++i) {
671 vorbis_residue *res_setup = &vc->residues[i];
0a6b1a9f 672 uint8_t cascade[64];
cf3ac543 673 unsigned high_bits, low_bits;
07c55d8e 674
a7adcf29 675 res_setup->type = get_bits(gb, 16);
07c55d8e 676
df96f22d 677 av_dlog(NULL, " %u. residue type %d\n", i, res_setup->type);
07c55d8e 678
a7adcf29
DB
679 res_setup->begin = get_bits(gb, 24);
680 res_setup->end = get_bits(gb, 24);
681 res_setup->partition_size = get_bits(gb, 24) + 1;
36b7e983 682 /* Validations to prevent a buffer overflow later. */
a7adcf29 683 if (res_setup->begin>res_setup->end ||
e6d527ff 684 res_setup->end > (res_setup->type == 2 ? vc->avccontext->channels : 1) * vc->blocksize[1] / 2 ||
a7adcf29 685 (res_setup->end-res_setup->begin) / res_setup->partition_size > V_MAX_PARTITIONS) {
0a6b1a9f
DB
686 av_log(vc->avccontext, AV_LOG_ERROR,
687 "partition out of bounds: type, begin, end, size, blocksize: %"PRIu16", %"PRIu32", %"PRIu32", %u, %"PRIu32"\n",
688 res_setup->type, res_setup->begin, res_setup->end,
689 res_setup->partition_size, vc->blocksize[1] / 2);
f666276f 690 return AVERROR_INVALIDDATA;
36b7e983
GC
691 }
692
a7adcf29 693 res_setup->classifications = get_bits(gb, 6) + 1;
7a41027c 694 GET_VALIDATED_INDEX(res_setup->classbook, 8, vc->codebook_count)
07c55d8e 695
3c35da2f
MR
696 res_setup->ptns_to_read =
697 (res_setup->end - res_setup->begin) / res_setup->partition_size;
698 res_setup->classifs = av_malloc(res_setup->ptns_to_read *
699 vc->audio_channels *
700 sizeof(*res_setup->classifs));
55aa55f2
AC
701 if (!res_setup->classifs)
702 return AVERROR(ENOMEM);
3c35da2f 703
df96f22d
DB
704 av_dlog(NULL, " begin %d end %d part.size %d classif.s %d classbook %d \n",
705 res_setup->begin, res_setup->end, res_setup->partition_size,
706 res_setup->classifications, res_setup->classbook);
07c55d8e 707
a7adcf29
DB
708 for (j = 0; j < res_setup->classifications; ++j) {
709 high_bits = 0;
710 low_bits = get_bits(gb, 3);
5e56b30e 711 if (get_bits1(gb))
a7adcf29
DB
712 high_bits = get_bits(gb, 5);
713 cascade[j] = (high_bits << 3) + low_bits;
07c55d8e 714
df96f22d 715 av_dlog(NULL, " %u class cascade depth: %d\n", j, ilog(cascade[j]));
07c55d8e
AJ
716 }
717
a7adcf29
DB
718 res_setup->maxpass = 0;
719 for (j = 0; j < res_setup->classifications; ++j) {
720 for (k = 0; k < 8; ++k) {
721 if (cascade[j]&(1 << k)) {
7a41027c 722 GET_VALIDATED_INDEX(res_setup->books[j][k], 8, vc->codebook_count)
07c55d8e 723
df96f22d
DB
724 av_dlog(NULL, " %u class cascade depth %u book: %d\n",
725 j, k, res_setup->books[j][k]);
07c55d8e 726
5e56b30e 727 if (k>res_setup->maxpass)
a7adcf29 728 res_setup->maxpass = k;
07c55d8e 729 } else {
a7adcf29 730 res_setup->books[j][k] = -1;
07c55d8e
AJ
731 }
732 }
733 }
734 }
735 return 0;
736}
737
738// Process mappings part
739
5e56b30e
DB
740static int vorbis_parse_setup_hdr_mappings(vorbis_context *vc)
741{
a7adcf29 742 GetBitContext *gb = &vc->gb;
cf3ac543 743 unsigned i, j;
07c55d8e 744
a7adcf29 745 vc->mapping_count = get_bits(gb, 6)+1;
d1be646e 746 vc->mappings = av_mallocz(vc->mapping_count * sizeof(*vc->mappings));
07c55d8e 747
df96f22d 748 av_dlog(NULL, " There are %d mappings. \n", vc->mapping_count);
07c55d8e 749
a7adcf29
DB
750 for (i = 0; i < vc->mapping_count; ++i) {
751 vorbis_mapping *mapping_setup = &vc->mappings[i];
07c55d8e
AJ
752
753 if (get_bits(gb, 16)) {
754 av_log(vc->avccontext, AV_LOG_ERROR, "Other mappings than type 0 are not compliant with the Vorbis I specification. \n");
f666276f 755 return AVERROR_INVALIDDATA;
07c55d8e
AJ
756 }
757 if (get_bits1(gb)) {
a7adcf29 758 mapping_setup->submaps = get_bits(gb, 4) + 1;
07c55d8e 759 } else {
a7adcf29 760 mapping_setup->submaps = 1;
07c55d8e
AJ
761 }
762
763 if (get_bits1(gb)) {
a7adcf29 764 mapping_setup->coupling_steps = get_bits(gb, 8) + 1;
d1be646e
DB
765 mapping_setup->magnitude = av_mallocz(mapping_setup->coupling_steps *
766 sizeof(*mapping_setup->magnitude));
767 mapping_setup->angle = av_mallocz(mapping_setup->coupling_steps *
768 sizeof(*mapping_setup->angle));
a7adcf29 769 for (j = 0; j < mapping_setup->coupling_steps; ++j) {
7a41027c
RD
770 GET_VALIDATED_INDEX(mapping_setup->magnitude[j], ilog(vc->audio_channels - 1), vc->audio_channels)
771 GET_VALIDATED_INDEX(mapping_setup->angle[j], ilog(vc->audio_channels - 1), vc->audio_channels)
07c55d8e
AJ
772 }
773 } else {
a7adcf29 774 mapping_setup->coupling_steps = 0;
07c55d8e
AJ
775 }
776
df96f22d
DB
777 av_dlog(NULL, " %u mapping coupling steps: %d\n",
778 i, mapping_setup->coupling_steps);
07c55d8e 779
a7adcf29 780 if (get_bits(gb, 2)) {
cf3ac543 781 av_log(vc->avccontext, AV_LOG_ERROR, "%u. mapping setup data invalid.\n", i);
f666276f 782 return AVERROR_INVALIDDATA; // following spec.
07c55d8e
AJ
783 }
784
785 if (mapping_setup->submaps>1) {
d1be646e
DB
786 mapping_setup->mux = av_mallocz(vc->audio_channels *
787 sizeof(*mapping_setup->mux));
a7adcf29
DB
788 for (j = 0; j < vc->audio_channels; ++j)
789 mapping_setup->mux[j] = get_bits(gb, 4);
07c55d8e
AJ
790 }
791
a7adcf29 792 for (j = 0; j < mapping_setup->submaps; ++j) {
7ae7300e 793 skip_bits(gb, 8); // FIXME check?
7a41027c
RD
794 GET_VALIDATED_INDEX(mapping_setup->submap_floor[j], 8, vc->floor_count)
795 GET_VALIDATED_INDEX(mapping_setup->submap_residue[j], 8, vc->residue_count)
07c55d8e 796
df96f22d
DB
797 av_dlog(NULL, " %u mapping %u submap : floor %d, residue %d\n", i, j,
798 mapping_setup->submap_floor[j],
799 mapping_setup->submap_residue[j]);
07c55d8e
AJ
800 }
801 }
802 return 0;
803}
804
805// Process modes part
806
cf3ac543 807static void create_map(vorbis_context *vc, unsigned floor_number)
07c55d8e 808{
a7adcf29
DB
809 vorbis_floor *floors = vc->floors;
810 vorbis_floor0 *vf;
07c55d8e 811 int idx;
cf3ac543 812 int blockflag, n;
0a6b1a9f 813 int32_t *map;
07c55d8e 814
a7adcf29
DB
815 for (blockflag = 0; blockflag < 2; ++blockflag) {
816 n = vc->blocksize[blockflag] / 2;
817 floors[floor_number].data.t0.map[blockflag] =
0a6b1a9f 818 av_malloc((n + 1) * sizeof(int32_t)); // n + sentinel
07c55d8e 819
a7adcf29
DB
820 map = floors[floor_number].data.t0.map[blockflag];
821 vf = &floors[floor_number].data.t0;
07c55d8e 822
a7adcf29
DB
823 for (idx = 0; idx < n; ++idx) {
824 map[idx] = floor(BARK((vf->rate * idx) / (2.0f * n)) *
3dc99a18 825 (vf->bark_map_size / BARK(vf->rate / 2.0f)));
a7adcf29
DB
826 if (vf->bark_map_size-1 < map[idx])
827 map[idx] = vf->bark_map_size - 1;
828 }
829 map[n] = -1;
830 vf->map_size[blockflag] = n;
07c55d8e
AJ
831 }
832
a7adcf29 833 for (idx = 0; idx <= n; ++idx) {
df96f22d 834 av_dlog(NULL, "floor0 map: map at pos %d is %d\n", idx, map[idx]);
07c55d8e 835 }
07c55d8e
AJ
836}
837
5e56b30e
DB
838static int vorbis_parse_setup_hdr_modes(vorbis_context *vc)
839{
a7adcf29 840 GetBitContext *gb = &vc->gb;
cf3ac543 841 unsigned i;
07c55d8e 842
a7adcf29 843 vc->mode_count = get_bits(gb, 6) + 1;
d1be646e 844 vc->modes = av_mallocz(vc->mode_count * sizeof(*vc->modes));
07c55d8e 845
df96f22d 846 av_dlog(NULL, " There are %d modes.\n", vc->mode_count);
07c55d8e 847
a7adcf29
DB
848 for (i = 0; i < vc->mode_count; ++i) {
849 vorbis_mode *mode_setup = &vc->modes[i];
07c55d8e 850
a7adcf29
DB
851 mode_setup->blockflag = get_bits1(gb);
852 mode_setup->windowtype = get_bits(gb, 16); //FIXME check
853 mode_setup->transformtype = get_bits(gb, 16); //FIXME check
7a41027c 854 GET_VALIDATED_INDEX(mode_setup->mapping, 8, vc->mapping_count);
07c55d8e 855
df96f22d
DB
856 av_dlog(NULL, " %u mode: blockflag %d, windowtype %d, transformtype %d, mapping %d\n",
857 i, mode_setup->blockflag, mode_setup->windowtype,
858 mode_setup->transformtype, mode_setup->mapping);
07c55d8e
AJ
859 }
860 return 0;
861}
862
863// Process the whole setup header using the functions above
864
5e56b30e
DB
865static int vorbis_parse_setup_hdr(vorbis_context *vc)
866{
a7adcf29 867 GetBitContext *gb = &vc->gb;
f666276f 868 int ret;
07c55d8e 869
a7adcf29
DB
870 if ((get_bits(gb, 8) != 'v') || (get_bits(gb, 8) != 'o') ||
871 (get_bits(gb, 8) != 'r') || (get_bits(gb, 8) != 'b') ||
872 (get_bits(gb, 8) != 'i') || (get_bits(gb, 8) != 's')) {
07c55d8e 873 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (no vorbis signature). \n");
f666276f 874 return AVERROR_INVALIDDATA;
07c55d8e
AJ
875 }
876
f666276f 877 if ((ret = vorbis_parse_setup_hdr_codebooks(vc))) {
07c55d8e 878 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (codebooks). \n");
f666276f 879 return ret;
07c55d8e 880 }
f666276f 881 if ((ret = vorbis_parse_setup_hdr_tdtransforms(vc))) {
07c55d8e 882 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (time domain transforms). \n");
f666276f 883 return ret;
07c55d8e 884 }
f666276f 885 if ((ret = vorbis_parse_setup_hdr_floors(vc))) {
07c55d8e 886 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (floors). \n");
f666276f 887 return ret;
07c55d8e 888 }
f666276f 889 if ((ret = vorbis_parse_setup_hdr_residues(vc))) {
07c55d8e 890 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (residues). \n");
f666276f 891 return ret;
07c55d8e 892 }
f666276f 893 if ((ret = vorbis_parse_setup_hdr_mappings(vc))) {
07c55d8e 894 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (mappings). \n");
f666276f 895 return ret;
07c55d8e 896 }
f666276f 897 if ((ret = vorbis_parse_setup_hdr_modes(vc))) {
07c55d8e 898 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (modes). \n");
f666276f 899 return ret;
07c55d8e
AJ
900 }
901 if (!get_bits1(gb)) {
902 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (framing flag). \n");
f666276f 903 return AVERROR_INVALIDDATA; // framing flag bit unset error
07c55d8e
AJ
904 }
905
906 return 0;
907}
908
909// Process the identification header
910
5e56b30e
DB
911static int vorbis_parse_id_hdr(vorbis_context *vc)
912{
a7adcf29 913 GetBitContext *gb = &vc->gb;
cf3ac543 914 unsigned bl0, bl1;
07c55d8e 915
a7adcf29
DB
916 if ((get_bits(gb, 8) != 'v') || (get_bits(gb, 8) != 'o') ||
917 (get_bits(gb, 8) != 'r') || (get_bits(gb, 8) != 'b') ||
918 (get_bits(gb, 8) != 'i') || (get_bits(gb, 8) != 's')) {
07c55d8e 919 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis id header packet corrupt (no vorbis signature). \n");
f666276f 920 return AVERROR_INVALIDDATA;
07c55d8e
AJ
921 }
922
a7adcf29
DB
923 vc->version = get_bits_long(gb, 32); //FIXME check 0
924 vc->audio_channels = get_bits(gb, 8);
925 if (vc->audio_channels <= 0) {
9062cd35 926 av_log(vc->avccontext, AV_LOG_ERROR, "Invalid number of channels\n");
f666276f 927 return AVERROR_INVALIDDATA;
9062cd35 928 }
a7adcf29
DB
929 vc->audio_samplerate = get_bits_long(gb, 32);
930 if (vc->audio_samplerate <= 0) {
9062cd35 931 av_log(vc->avccontext, AV_LOG_ERROR, "Invalid samplerate\n");
f666276f 932 return AVERROR_INVALIDDATA;
9062cd35 933 }
a7adcf29
DB
934 vc->bitrate_maximum = get_bits_long(gb, 32);
935 vc->bitrate_nominal = get_bits_long(gb, 32);
936 vc->bitrate_minimum = get_bits_long(gb, 32);
937 bl0 = get_bits(gb, 4);
938 bl1 = get_bits(gb, 4);
939 vc->blocksize[0] = (1 << bl0);
940 vc->blocksize[1] = (1 << bl1);
941 if (bl0 > 13 || bl0 < 6 || bl1 > 13 || bl1 < 6 || bl1 < bl0) {
07c55d8e 942 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis id header packet corrupt (illegal blocksize). \n");
f666276f 943 return AVERROR_INVALIDDATA;
07c55d8e 944 }
a7adcf29
DB
945 vc->win[0] = ff_vorbis_vwin[bl0 - 6];
946 vc->win[1] = ff_vorbis_vwin[bl1 - 6];
07c55d8e 947
07c55d8e
AJ
948 if ((get_bits1(gb)) == 0) {
949 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis id header packet corrupt (framing flag not set). \n");
f666276f 950 return AVERROR_INVALIDDATA;
07c55d8e
AJ
951 }
952
d1be646e
DB
953 vc->channel_residues = av_malloc((vc->blocksize[1] / 2) * vc->audio_channels * sizeof(*vc->channel_residues));
954 vc->channel_floors = av_malloc((vc->blocksize[1] / 2) * vc->audio_channels * sizeof(*vc->channel_floors));
955 vc->saved = av_mallocz((vc->blocksize[1] / 4) * vc->audio_channels * sizeof(*vc->saved));
a7adcf29 956 vc->previous_window = 0;
07c55d8e 957
9d06d7bc
JR
958 ff_mdct_init(&vc->mdct[0], bl0, 1, -vc->scale_bias);
959 ff_mdct_init(&vc->mdct[1], bl1, 1, -vc->scale_bias);
07c55d8e 960
df96f22d 961 av_dlog(NULL, " 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 ",
07c55d8e
AJ
962 vc->version, vc->audio_channels, vc->audio_samplerate, vc->bitrate_maximum, vc->bitrate_nominal, vc->bitrate_minimum, vc->blocksize[0], vc->blocksize[1]);
963
964/*
a7adcf29
DB
965 BLK = vc->blocksize[0];
966 for (i = 0; i < BLK / 2; ++i) {
967 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)));
07c55d8e
AJ
968 }
969*/
970
971 return 0;
972}
973
974// Process the extradata using the functions above (identification header, setup header)
975
5e56b30e
DB
976static av_cold int vorbis_decode_init(AVCodecContext *avccontext)
977{
b95fbba7 978 vorbis_context *vc = avccontext->priv_data;
a7adcf29
DB
979 uint8_t *headers = avccontext->extradata;
980 int headers_len = avccontext->extradata_size;
07c55d8e
AJ
981 uint8_t *header_start[3];
982 int header_len[3];
3dc99a18 983 GetBitContext *gb = &vc->gb;
f666276f 984 int hdr_type, ret;
07c55d8e
AJ
985
986 vc->avccontext = avccontext;
9cf0841e 987 ff_dsputil_init(&vc->dsp, avccontext);
d5a7229b 988 avpriv_float_dsp_init(&vc->fdsp, avccontext->flags & CODEC_FLAG_BITEXACT);
c73d99e6 989 ff_fmt_convert_init(&vc->fmt_conv, avccontext);
07c55d8e 990
9aa8193a
JR
991 if (avccontext->request_sample_fmt == AV_SAMPLE_FMT_FLT) {
992 avccontext->sample_fmt = AV_SAMPLE_FMT_FLT;
993 vc->scale_bias = 1.0f;
994 } else {
995 avccontext->sample_fmt = AV_SAMPLE_FMT_S16;
996 vc->scale_bias = 32768.0f;
997 }
07c55d8e
AJ
998
999 if (!headers_len) {
b2cc8111 1000 av_log(avccontext, AV_LOG_ERROR, "Extradata missing.\n");
f666276f 1001 return AVERROR_INVALIDDATA;
07c55d8e
AJ
1002 }
1003
f666276f 1004 if ((ret = avpriv_split_xiph_headers(headers, headers_len, 30, header_start, header_len)) < 0) {
07c55d8e 1005 av_log(avccontext, AV_LOG_ERROR, "Extradata corrupt.\n");
f666276f 1006 return ret;
07c55d8e
AJ
1007 }
1008
1009 init_get_bits(gb, header_start[0], header_len[0]*8);
a7adcf29
DB
1010 hdr_type = get_bits(gb, 8);
1011 if (hdr_type != 1) {
07c55d8e 1012 av_log(avccontext, AV_LOG_ERROR, "First header is not the id header.\n");
f666276f 1013 return AVERROR_INVALIDDATA;
07c55d8e 1014 }
f666276f 1015 if ((ret = vorbis_parse_id_hdr(vc))) {
07c55d8e
AJ
1016 av_log(avccontext, AV_LOG_ERROR, "Id header corrupt.\n");
1017 vorbis_free(vc);
f666276f 1018 return ret;
07c55d8e
AJ
1019 }
1020
1021 init_get_bits(gb, header_start[2], header_len[2]*8);
a7adcf29
DB
1022 hdr_type = get_bits(gb, 8);
1023 if (hdr_type != 5) {
07c55d8e 1024 av_log(avccontext, AV_LOG_ERROR, "Third header is not the setup header.\n");
c8562a6f 1025 vorbis_free(vc);
f666276f 1026 return AVERROR_INVALIDDATA;
07c55d8e 1027 }
f666276f 1028 if ((ret = vorbis_parse_setup_hdr(vc))) {
07c55d8e
AJ
1029 av_log(avccontext, AV_LOG_ERROR, "Setup header corrupt.\n");
1030 vorbis_free(vc);
f666276f 1031 return ret;
07c55d8e
AJ
1032 }
1033
4a27f326 1034 if (vc->audio_channels > 8)
53a71e1b
RS
1035 avccontext->channel_layout = 0;
1036 else
1037 avccontext->channel_layout = ff_vorbis_channel_layouts[vc->audio_channels - 1];
1038
a7adcf29 1039 avccontext->channels = vc->audio_channels;
07c55d8e
AJ
1040 avccontext->sample_rate = vc->audio_samplerate;
1041
0eea2129
JR
1042 avcodec_get_frame_defaults(&vc->frame);
1043 avccontext->coded_frame = &vc->frame;
1044
b95fbba7 1045 return 0;
07c55d8e
AJ
1046}
1047
1048// Decode audiopackets -------------------------------------------------
1049
1050// Read and decode floor
1051
3dde6675
JGG
1052static int vorbis_floor0_decode(vorbis_context *vc,
1053 vorbis_floor_data *vfu, float *vec)
5e56b30e 1054{
a7adcf29
DB
1055 vorbis_floor0 *vf = &vfu->t0;
1056 float *lsp = vf->lsp;
cf3ac543
DB
1057 unsigned amplitude, book_idx;
1058 unsigned blockflag = vc->modes[vc->mode_number].blockflag;
07c55d8e 1059
a7adcf29
DB
1060 amplitude = get_bits(&vc->gb, vf->amplitude_bits);
1061 if (amplitude > 0) {
07c55d8e 1062 float last = 0;
cf3ac543 1063 unsigned idx, lsp_len = 0;
07c55d8e
AJ
1064 vorbis_codebook codebook;
1065
a7adcf29
DB
1066 book_idx = get_bits(&vc->gb, ilog(vf->num_books));
1067 if (book_idx >= vf->num_books) {
1068 av_log(vc->avccontext, AV_LOG_ERROR,
1069 "floor0 dec: booknumber too high!\n");
1070 book_idx = 0;
07c55d8e 1071 }
df96f22d 1072 av_dlog(NULL, "floor0 dec: booknumber: %u\n", book_idx);
a7adcf29 1073 codebook = vc->codebooks[vf->book_list[book_idx]];
3dde6675
JGG
1074 /* Invalid codebook! */
1075 if (!codebook.codevectors)
f666276f 1076 return AVERROR_INVALIDDATA;
07c55d8e
AJ
1077
1078 while (lsp_len<vf->order) {
1079 int vec_off;
1080
df96f22d
DB
1081 av_dlog(NULL, "floor0 dec: book dimension: %d\n", codebook.dimensions);
1082 av_dlog(NULL, "floor0 dec: maximum depth: %d\n", codebook.maxdepth);
07c55d8e 1083 /* read temp vector */
a7adcf29
DB
1084 vec_off = get_vlc2(&vc->gb, codebook.vlc.table,
1085 codebook.nb_bits, codebook.maxdepth)
1086 * codebook.dimensions;
df96f22d 1087 av_dlog(NULL, "floor0 dec: vector offset: %d\n", vec_off);
07c55d8e 1088 /* copy each vector component and add last to it */
a7adcf29
DB
1089 for (idx = 0; idx < codebook.dimensions; ++idx)
1090 lsp[lsp_len+idx] = codebook.codevectors[vec_off+idx] + last;
1091 last = lsp[lsp_len+idx-1]; /* set last to last vector component */
07c55d8e
AJ
1092
1093 lsp_len += codebook.dimensions;
1094 }
07c55d8e
AJ
1095 /* DEBUG: output lsp coeffs */
1096 {
1097 int idx;
a7adcf29 1098 for (idx = 0; idx < lsp_len; ++idx)
df96f22d 1099 av_dlog(NULL, "floor0 dec: coeff at %d is %f\n", idx, lsp[idx]);
07c55d8e 1100 }
07c55d8e
AJ
1101
1102 /* synthesize floor output vector */
1103 {
1104 int i;
a7adcf29
DB
1105 int order = vf->order;
1106 float wstep = M_PI / vf->bark_map_size;
07c55d8e 1107
a7adcf29
DB
1108 for (i = 0; i < order; i++)
1109 lsp[i] = 2.0f * cos(lsp[i]);
07c55d8e 1110
2d9570a3
DB
1111 av_dlog(NULL, "floor0 synth: map_size = %"PRIu32"; m = %d; wstep = %f\n",
1112 vf->map_size[blockflag], order, wstep);
1113
a7adcf29
DB
1114 i = 0;
1115 while (i < vf->map_size[blockflag]) {
1116 int j, iter_cond = vf->map[blockflag][i];
1117 float p = 0.5f;
1118 float q = 0.5f;
1119 float two_cos_w = 2.0f * cos(wstep * iter_cond); // needed all times
07c55d8e
AJ
1120
1121 /* similar part for the q and p products */
a7adcf29
DB
1122 for (j = 0; j + 1 < order; j += 2) {
1123 q *= lsp[j] - two_cos_w;
1124 p *= lsp[j + 1] - two_cos_w;
07c55d8e 1125 }
a7adcf29
DB
1126 if (j == order) { // even order
1127 p *= p * (2.0f - two_cos_w);
1128 q *= q * (2.0f + two_cos_w);
5e56b30e 1129 } else { // odd order
07c55d8e
AJ
1130 q *= two_cos_w-lsp[j]; // one more time for q
1131
1132 /* final step and square */
a7adcf29 1133 p *= p * (4.f - two_cos_w * two_cos_w);
07c55d8e
AJ
1134 q *= q;
1135 }
1136
1137 /* calculate linear floor value */
07f06540
AS
1138 q = exp((((amplitude*vf->amplitude_offset) /
1139 (((1 << vf->amplitude_bits) - 1) * sqrt(p + q)))
1140 - vf->amplitude_offset) * .11512925f);
07c55d8e
AJ
1141
1142 /* fill vector */
5e56b30e 1143 do {
a7adcf29
DB
1144 vec[i] = q; ++i;
1145 } while (vf->map[blockflag][i] == iter_cond);
07c55d8e
AJ
1146 }
1147 }
5e56b30e 1148 } else {
07c55d8e
AJ
1149 /* this channel is unused */
1150 return 1;
1151 }
1152
df96f22d 1153 av_dlog(NULL, " Floor0 decoded\n");
07c55d8e
AJ
1154
1155 return 0;
1156}
1157
3dde6675
JGG
1158static int vorbis_floor1_decode(vorbis_context *vc,
1159 vorbis_floor_data *vfu, float *vec)
5e56b30e 1160{
a7adcf29
DB
1161 vorbis_floor1 *vf = &vfu->t1;
1162 GetBitContext *gb = &vc->gb;
0a6b1a9f
DB
1163 uint16_t range_v[4] = { 256, 128, 86, 64 };
1164 unsigned range = range_v[vf->multiplier - 1];
1165 uint16_t floor1_Y[258];
1166 uint16_t floor1_Y_final[258];
3c35da2f 1167 int floor1_flag[258];
cf3ac543
DB
1168 unsigned class, cdim, cbits, csub, cval, offset, i, j;
1169 int book, adx, ady, dy, off, predicted, err;
07c55d8e
AJ
1170
1171
0b8e7ab0
DB
1172 if (!get_bits1(gb)) // silence
1173 return 1;
07c55d8e
AJ
1174
1175// Read values (or differences) for the floor's points
1176
a7adcf29
DB
1177 floor1_Y[0] = get_bits(gb, ilog(range - 1));
1178 floor1_Y[1] = get_bits(gb, ilog(range - 1));
07c55d8e 1179
df96f22d 1180 av_dlog(NULL, "floor 0 Y %d floor 1 Y %d \n", floor1_Y[0], floor1_Y[1]);
07c55d8e 1181
a7adcf29
DB
1182 offset = 2;
1183 for (i = 0; i < vf->partitions; ++i) {
b2395268
DB
1184 class = vf->partition_class[i];
1185 cdim = vf->class_dimensions[class];
1186 cbits = vf->class_subclasses[class];
a7adcf29
DB
1187 csub = (1 << cbits) - 1;
1188 cval = 0;
07c55d8e 1189
df96f22d 1190 av_dlog(NULL, "Cbits %u\n", cbits);
07c55d8e 1191
5e56b30e 1192 if (cbits) // this reads all subclasses for this partition's class
b2395268
DB
1193 cval = get_vlc2(gb, vc->codebooks[vf->class_masterbook[class]].vlc.table,
1194 vc->codebooks[vf->class_masterbook[class]].nb_bits, 3);
07c55d8e 1195
a7adcf29 1196 for (j = 0; j < cdim; ++j) {
b2395268 1197 book = vf->subclass_books[class][cval & csub];
07c55d8e 1198
df96f22d
DB
1199 av_dlog(NULL, "book %d Cbits %u cval %u bits:%d\n",
1200 book, cbits, cval, get_bits_count(gb));
07c55d8e 1201
a7adcf29
DB
1202 cval = cval >> cbits;
1203 if (book > -1) {
1204 floor1_Y[offset+j] = get_vlc2(gb, vc->codebooks[book].vlc.table,
07c55d8e
AJ
1205 vc->codebooks[book].nb_bits, 3);
1206 } else {
a7adcf29 1207 floor1_Y[offset+j] = 0;
07c55d8e
AJ
1208 }
1209
df96f22d
DB
1210 av_dlog(NULL, " floor(%d) = %d \n",
1211 vf->list[offset+j].x, floor1_Y[offset+j]);
07c55d8e
AJ
1212 }
1213 offset+=cdim;
1214 }
1215
1216// Amplitude calculation from the differences
1217
a7adcf29
DB
1218 floor1_flag[0] = 1;
1219 floor1_flag[1] = 1;
1220 floor1_Y_final[0] = floor1_Y[0];
1221 floor1_Y_final[1] = floor1_Y[1];
07c55d8e 1222
a7adcf29 1223 for (i = 2; i < vf->x_list_dim; ++i) {
cf3ac543 1224 unsigned val, highroom, lowroom, room, high_neigh_offs, low_neigh_offs;
07c55d8e 1225
a7adcf29
DB
1226 low_neigh_offs = vf->list[i].low;
1227 high_neigh_offs = vf->list[i].high;
1228 dy = floor1_Y_final[high_neigh_offs] - floor1_Y_final[low_neigh_offs]; // render_point begin
1229 adx = vf->list[high_neigh_offs].x - vf->list[low_neigh_offs].x;
1230 ady = FFABS(dy);
1231 err = ady * (vf->list[i].x - vf->list[low_neigh_offs].x);
8455e8c7 1232 off = err / adx;
a7adcf29
DB
1233 if (dy < 0) {
1234 predicted = floor1_Y_final[low_neigh_offs] - off;
07c55d8e 1235 } else {
a7adcf29 1236 predicted = floor1_Y_final[low_neigh_offs] + off;
07c55d8e
AJ
1237 } // render_point end
1238
a7adcf29
DB
1239 val = floor1_Y[i];
1240 highroom = range-predicted;
1241 lowroom = predicted;
07c55d8e 1242 if (highroom < lowroom) {
a7adcf29 1243 room = highroom * 2;
07c55d8e 1244 } else {
a7adcf29 1245 room = lowroom * 2; // SPEC mispelling
07c55d8e
AJ
1246 }
1247 if (val) {
a7adcf29
DB
1248 floor1_flag[low_neigh_offs] = 1;
1249 floor1_flag[high_neigh_offs] = 1;
1250 floor1_flag[i] = 1;
1251 if (val >= room) {
07c55d8e 1252 if (highroom > lowroom) {
24947d49 1253 floor1_Y_final[i] = av_clip_uint16(val - lowroom + predicted);
07c55d8e 1254 } else {
24947d49 1255 floor1_Y_final[i] = av_clip_uint16(predicted - val + highroom - 1);
07c55d8e
AJ
1256 }
1257 } else {
1258 if (val & 1) {
24947d49 1259 floor1_Y_final[i] = av_clip_uint16(predicted - (val + 1) / 2);
07c55d8e 1260 } else {
24947d49 1261 floor1_Y_final[i] = av_clip_uint16(predicted + val / 2);
07c55d8e
AJ
1262 }
1263 }
1264 } else {
a7adcf29 1265 floor1_flag[i] = 0;
24947d49 1266 floor1_Y_final[i] = av_clip_uint16(predicted);
07c55d8e
AJ
1267 }
1268
df96f22d
DB
1269 av_dlog(NULL, " Decoded floor(%d) = %u / val %u\n",
1270 vf->list[i].x, floor1_Y_final[i], val);
07c55d8e
AJ
1271 }
1272
1273// Curve synth - connect the calculated dots and convert from dB scale FIXME optimize ?
1274
1275 ff_vorbis_floor1_render_list(vf->list, vf->x_list_dim, floor1_Y_final, floor1_flag, vf->multiplier, vec, vf->list[1].x);
1276
df96f22d 1277 av_dlog(NULL, " Floor decoded\n");
07c55d8e
AJ
1278
1279 return 0;
1280}
1281
1282// Read and decode residue
1283
5e56b30e
DB
1284static av_always_inline int vorbis_residue_decode_internal(vorbis_context *vc,
1285 vorbis_residue *vr,
cf3ac543 1286 unsigned ch,
0a6b1a9f 1287 uint8_t *do_not_decode,
5e56b30e 1288 float *vec,
cf3ac543 1289 unsigned vlen,
afb2aa53 1290 unsigned ch_left,
a7adcf29 1291 int vr_type)
5e56b30e 1292{
a7adcf29 1293 GetBitContext *gb = &vc->gb;
cf3ac543
DB
1294 unsigned c_p_c = vc->codebooks[vr->classbook].dimensions;
1295 unsigned ptns_to_read = vr->ptns_to_read;
366d9190 1296 uint8_t *classifs = vr->classifs;
cf3ac543 1297 unsigned pass, ch_used, i, j, k, l;
afb2aa53 1298 unsigned max_output = (ch - 1) * vlen;
07c55d8e 1299
a7adcf29
DB
1300 if (vr_type == 2) {
1301 for (j = 1; j < ch; ++j)
1302 do_not_decode[0] &= do_not_decode[j]; // FIXME - clobbering input
5e56b30e
DB
1303 if (do_not_decode[0])
1304 return 0;
a7adcf29 1305 ch_used = 1;
afb2aa53 1306 max_output += vr->end / ch;
07c55d8e 1307 } else {
a7adcf29 1308 ch_used = ch;
afb2aa53
CE
1309 max_output += vr->end;
1310 }
1311
1312 if (max_output > ch_left * vlen) {
1313 av_log(vc->avccontext, AV_LOG_ERROR, "Insufficient output buffer\n");
1314 return -1;
07c55d8e
AJ
1315 }
1316
df96f22d 1317 av_dlog(NULL, " residue type 0/1/2 decode begin, ch: %d cpc %d \n", ch, c_p_c);
07c55d8e 1318
a7adcf29 1319 for (pass = 0; pass <= vr->maxpass; ++pass) { // FIXME OPTIMIZE?
cf3ac543 1320 uint16_t voffset, partition_count, j_times_ptns_to_read;
07c55d8e 1321
a7adcf29
DB
1322 voffset = vr->begin;
1323 for (partition_count = 0; partition_count < ptns_to_read;) { // SPEC error
07c55d8e 1324 if (!pass) {
cf3ac543 1325 unsigned inverse_class = ff_inverse[vr->classifications];
a7adcf29 1326 for (j_times_ptns_to_read = 0, j = 0; j < ch_used; ++j) {
07c55d8e 1327 if (!do_not_decode[j]) {
cf3ac543
DB
1328 unsigned temp = get_vlc2(gb, vc->codebooks[vr->classbook].vlc.table,
1329 vc->codebooks[vr->classbook].nb_bits, 3);
07c55d8e 1330
df96f22d 1331 av_dlog(NULL, "Classword: %u\n", temp);
07c55d8e 1332
a7adcf29
DB
1333 assert(vr->classifications > 1 && temp <= 65536); //needed for inverse[]
1334 for (i = 0; i < c_p_c; ++i) {
cf3ac543 1335 unsigned temp2;
07c55d8e 1336
cf3ac543 1337 temp2 = (((uint64_t)temp) * inverse_class) >> 32;
a7adcf29
DB
1338 if (partition_count + c_p_c - 1 - i < ptns_to_read)
1339 classifs[j_times_ptns_to_read + partition_count + c_p_c - 1 - i] = temp - temp2 * vr->classifications;
1340 temp = temp2;
07c55d8e
AJ
1341 }
1342 }
a7adcf29 1343 j_times_ptns_to_read += ptns_to_read;
07c55d8e
AJ
1344 }
1345 }
a7adcf29
DB
1346 for (i = 0; (i < c_p_c) && (partition_count < ptns_to_read); ++i) {
1347 for (j_times_ptns_to_read = 0, j = 0; j < ch_used; ++j) {
cf3ac543 1348 unsigned voffs;
07c55d8e
AJ
1349
1350 if (!do_not_decode[j]) {
cf3ac543
DB
1351 unsigned vqclass = classifs[j_times_ptns_to_read + partition_count];
1352 int vqbook = vr->books[vqclass][pass];
07c55d8e 1353
a7adcf29 1354 if (vqbook >= 0 && vc->codebooks[vqbook].codevectors) {
cf3ac543
DB
1355 unsigned coffs;
1356 unsigned dim = vc->codebooks[vqbook].dimensions;
1357 unsigned step = dim == 1 ? vr->partition_size
1358 : FASTDIV(vr->partition_size, dim);
a7adcf29
DB
1359 vorbis_codebook codebook = vc->codebooks[vqbook];
1360
1361 if (vr_type == 0) {
1362
1363 voffs = voffset+j*vlen;
1364 for (k = 0; k < step; ++k) {
1365 coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * dim;
1366 for (l = 0; l < dim; ++l)
1367 vec[voffs + k + l * step] += codebook.codevectors[coffs + l]; // FPMATH
07c55d8e 1368 }
a7adcf29
DB
1369 } else if (vr_type == 1) {
1370 voffs = voffset + j * vlen;
1371 for (k = 0; k < step; ++k) {
1372 coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * dim;
1373 for (l = 0; l < dim; ++l, ++voffs) {
07c55d8e
AJ
1374 vec[voffs]+=codebook.codevectors[coffs+l]; // FPMATH
1375
df96f22d
DB
1376 av_dlog(NULL, " pass %d offs: %d curr: %f change: %f cv offs.: %d \n",
1377 pass, voffs, vec[voffs], codebook.codevectors[coffs+l], coffs);
07c55d8e
AJ
1378 }
1379 }
a7adcf29
DB
1380 } else if (vr_type == 2 && ch == 2 && (voffset & 1) == 0 && (dim & 1) == 0) { // most frequent case optimized
1381 voffs = voffset >> 1;
1382
1383 if (dim == 2) {
1384 for (k = 0; k < step; ++k) {
1385 coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * 2;
1386 vec[voffs + k ] += codebook.codevectors[coffs ]; // FPMATH
1387 vec[voffs + k + vlen] += codebook.codevectors[coffs + 1]; // FPMATH
07c55d8e 1388 }
a7adcf29
DB
1389 } else if (dim == 4) {
1390 for (k = 0; k < step; ++k, voffs += 2) {
1391 coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * 4;
1392 vec[voffs ] += codebook.codevectors[coffs ]; // FPMATH
1393 vec[voffs + 1 ] += codebook.codevectors[coffs + 2]; // FPMATH
1394 vec[voffs + vlen ] += codebook.codevectors[coffs + 1]; // FPMATH
1395 vec[voffs + vlen + 1] += codebook.codevectors[coffs + 3]; // FPMATH
1a325367 1396 }
07c55d8e 1397 } else
a7adcf29
DB
1398 for (k = 0; k < step; ++k) {
1399 coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * dim;
1400 for (l = 0; l < dim; l += 2, voffs++) {
1401 vec[voffs ] += codebook.codevectors[coffs + l ]; // FPMATH
1402 vec[voffs + vlen] += codebook.codevectors[coffs + l + 1]; // FPMATH
07c55d8e 1403
df96f22d
DB
1404 av_dlog(NULL, " pass %d offs: %d curr: %f change: %f cv offs.: %d+%d \n",
1405 pass, voffset / ch + (voffs % ch) * vlen,
1406 vec[voffset / ch + (voffs % ch) * vlen],
1407 codebook.codevectors[coffs + l], coffs, l);
07c55d8e
AJ
1408 }
1409 }
1410
a7adcf29 1411 } else if (vr_type == 2) {
9fcda25e
MR
1412 unsigned voffs_div = FASTDIV(voffset, ch);
1413 unsigned voffs_mod = voffset - voffs_div * ch;
07c55d8e 1414
a7adcf29
DB
1415 for (k = 0; k < step; ++k) {
1416 coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * dim;
9fcda25e
MR
1417 for (l = 0; l < dim; ++l) {
1418 vec[voffs_div + voffs_mod * vlen] +=
1419 codebook.codevectors[coffs + l];
07c55d8e 1420
df96f22d 1421 av_dlog(NULL, " pass %d offs: %d curr: %f change: %f cv offs.: %d+%d \n",
9fcda25e
MR
1422 pass, voffs_div + voffs_mod * vlen,
1423 vec[voffs_div + voffs_mod * vlen],
df96f22d 1424 codebook.codevectors[coffs + l], coffs, l);
9fcda25e
MR
1425
1426 if (++voffs_mod == ch) {
1427 voffs_div++;
1428 voffs_mod = 0;
1429 }
07c55d8e
AJ
1430 }
1431 }
07c55d8e
AJ
1432 }
1433 }
1434 }
a7adcf29 1435 j_times_ptns_to_read += ptns_to_read;
07c55d8e
AJ
1436 }
1437 ++partition_count;
a7adcf29 1438 voffset += vr->partition_size;
07c55d8e
AJ
1439 }
1440 }
1441 }
1442 return 0;
1443}
1444
5e56b30e 1445static inline int vorbis_residue_decode(vorbis_context *vc, vorbis_residue *vr,
cf3ac543 1446 unsigned ch,
0a6b1a9f 1447 uint8_t *do_not_decode,
afb2aa53
CE
1448 float *vec, unsigned vlen,
1449 unsigned ch_left)
c541e668 1450{
a7adcf29 1451 if (vr->type == 2)
afb2aa53 1452 return vorbis_residue_decode_internal(vc, vr, ch, do_not_decode, vec, vlen, ch_left, 2);
a7adcf29 1453 else if (vr->type == 1)
afb2aa53 1454 return vorbis_residue_decode_internal(vc, vr, ch, do_not_decode, vec, vlen, ch_left, 1);
a7adcf29 1455 else if (vr->type == 0)
afb2aa53 1456 return vorbis_residue_decode_internal(vc, vr, ch, do_not_decode, vec, vlen, ch_left, 0);
c541e668
MN
1457 else {
1458 av_log(vc->avccontext, AV_LOG_ERROR, " Invalid residue type while residue decode?! \n");
f666276f 1459 return AVERROR_INVALIDDATA;
c541e668
MN
1460 }
1461}
1462
27cfdc3e 1463void ff_vorbis_inverse_coupling(float *mag, float *ang, int blocksize)
07c55d8e
AJ
1464{
1465 int i;
a7adcf29
DB
1466 for (i = 0; i < blocksize; i++) {
1467 if (mag[i] > 0.0) {
1468 if (ang[i] > 0.0) {
1469 ang[i] = mag[i] - ang[i];
07c55d8e 1470 } else {
a7adcf29
DB
1471 float temp = ang[i];
1472 ang[i] = mag[i];
1473 mag[i] += temp;
07c55d8e
AJ
1474 }
1475 } else {
a7adcf29
DB
1476 if (ang[i] > 0.0) {
1477 ang[i] += mag[i];
07c55d8e 1478 } else {
a7adcf29
DB
1479 float temp = ang[i];
1480 ang[i] = mag[i];
1481 mag[i] -= temp;
07c55d8e
AJ
1482 }
1483 }
1484 }
1485}
1486
1487// Decode the audio packet using the functions above
1488
5e56b30e
DB
1489static int vorbis_parse_audio_packet(vorbis_context *vc)
1490{
a7adcf29 1491 GetBitContext *gb = &vc->gb;
26f548bb 1492 FFTContext *mdct;
cf3ac543
DB
1493 unsigned previous_window = vc->previous_window;
1494 unsigned mode_number, blockflag, blocksize;
1495 int i, j;
0a6b1a9f
DB
1496 uint8_t no_residue[255];
1497 uint8_t do_not_decode[255];
07c55d8e 1498 vorbis_mapping *mapping;
a7adcf29
DB
1499 float *ch_res_ptr = vc->channel_residues;
1500 float *ch_floor_ptr = vc->channel_floors;
0a6b1a9f 1501 uint8_t res_chan[255];
cf3ac543
DB
1502 unsigned res_num = 0;
1503 int retlen = 0;
afb2aa53
CE
1504 unsigned ch_left = vc->audio_channels;
1505 unsigned vlen;
07c55d8e
AJ
1506
1507 if (get_bits1(gb)) {
1508 av_log(vc->avccontext, AV_LOG_ERROR, "Not a Vorbis I audio packet.\n");
f666276f 1509 return AVERROR_INVALIDDATA; // packet type not audio
07c55d8e
AJ
1510 }
1511
a7adcf29
DB
1512 if (vc->mode_count == 1) {
1513 mode_number = 0;
07c55d8e 1514 } else {
7a41027c 1515 GET_VALIDATED_INDEX(mode_number, ilog(vc->mode_count-1), vc->mode_count)
e5b0cfb5 1516 }
a7adcf29
DB
1517 vc->mode_number = mode_number;
1518 mapping = &vc->mappings[vc->modes[mode_number].mapping];
07c55d8e 1519
df96f22d
DB
1520 av_dlog(NULL, " Mode number: %u , mapping: %d , blocktype %d\n", mode_number,
1521 vc->modes[mode_number].mapping, vc->modes[mode_number].blockflag);
07c55d8e 1522
a7adcf29
DB
1523 blockflag = vc->modes[mode_number].blockflag;
1524 blocksize = vc->blocksize[blockflag];
afb2aa53 1525 vlen = blocksize / 2;
737ca448
JR
1526 if (blockflag) {
1527 previous_window = get_bits(gb, 1);
1528 skip_bits1(gb); // next_window
1529 }
07c55d8e 1530
afb2aa53
CE
1531 memset(ch_res_ptr, 0, sizeof(float) * vc->audio_channels * vlen); //FIXME can this be removed ?
1532 memset(ch_floor_ptr, 0, sizeof(float) * vc->audio_channels * vlen); //FIXME can this be removed ?
07c55d8e
AJ
1533
1534// Decode floor
1535
a7adcf29 1536 for (i = 0; i < vc->audio_channels; ++i) {
07c55d8e 1537 vorbis_floor *floor;
3dde6675 1538 int ret;
a7adcf29
DB
1539 if (mapping->submaps > 1) {
1540 floor = &vc->floors[mapping->submap_floor[mapping->mux[i]]];
07c55d8e 1541 } else {
a7adcf29 1542 floor = &vc->floors[mapping->submap_floor[0]];
07c55d8e
AJ
1543 }
1544
3dde6675
JGG
1545 ret = floor->decode(vc, &floor->data, ch_floor_ptr);
1546
1547 if (ret < 0) {
1548 av_log(vc->avccontext, AV_LOG_ERROR, "Invalid codebook in vorbis_floor_decode.\n");
f666276f 1549 return AVERROR_INVALIDDATA;
3dde6675
JGG
1550 }
1551 no_residue[i] = ret;
afb2aa53 1552 ch_floor_ptr += vlen;
07c55d8e
AJ
1553 }
1554
1555// Nonzero vector propagate
1556
a7adcf29 1557 for (i = mapping->coupling_steps - 1; i >= 0; --i) {
07c55d8e 1558 if (!(no_residue[mapping->magnitude[i]] & no_residue[mapping->angle[i]])) {
a7adcf29
DB
1559 no_residue[mapping->magnitude[i]] = 0;
1560 no_residue[mapping->angle[i]] = 0;
07c55d8e
AJ
1561 }
1562 }
1563
1564// Decode residue
1565
a7adcf29 1566 for (i = 0; i < mapping->submaps; ++i) {
07c55d8e 1567 vorbis_residue *residue;
cf3ac543 1568 unsigned ch = 0;
afb2aa53 1569 int ret;
07c55d8e 1570
a7adcf29
DB
1571 for (j = 0; j < vc->audio_channels; ++j) {
1572 if ((mapping->submaps == 1) || (i == mapping->mux[j])) {
1573 res_chan[j] = res_num;
07c55d8e 1574 if (no_residue[j]) {
a7adcf29 1575 do_not_decode[ch] = 1;
07c55d8e 1576 } else {
a7adcf29 1577 do_not_decode[ch] = 0;
07c55d8e
AJ
1578 }
1579 ++ch;
1580 ++res_num;
1581 }
1582 }
a7adcf29 1583 residue = &vc->residues[mapping->submap_residue[i]];
e6d527ff
RT
1584 if (ch_left < ch) {
1585 av_log(vc->avccontext, AV_LOG_ERROR, "Too many channels in vorbis_floor_decode.\n");
1586 return -1;
1587 }
afb2aa53
CE
1588 if (ch) {
1589 ret = vorbis_residue_decode(vc, residue, ch, do_not_decode, ch_res_ptr, vlen, ch_left);
1590 if (ret < 0)
1591 return ret;
1592 }
07c55d8e 1593
afb2aa53 1594 ch_res_ptr += ch * vlen;
e6d527ff 1595 ch_left -= ch;
07c55d8e
AJ
1596 }
1597
12623a80
AC
1598 if (ch_left > 0)
1599 return AVERROR_INVALIDDATA;
1600
07c55d8e
AJ
1601// Inverse coupling
1602
a7adcf29 1603 for (i = mapping->coupling_steps - 1; i >= 0; --i) { //warning: i has to be signed
07c55d8e
AJ
1604 float *mag, *ang;
1605
a7adcf29
DB
1606 mag = vc->channel_residues+res_chan[mapping->magnitude[i]] * blocksize / 2;
1607 ang = vc->channel_residues+res_chan[mapping->angle[i]] * blocksize / 2;
1608 vc->dsp.vorbis_inverse_coupling(mag, ang, blocksize / 2);
07c55d8e
AJ
1609 }
1610
9d2b5cf2 1611// Dotproduct, MDCT
07c55d8e 1612
26f548bb
MR
1613 mdct = &vc->mdct[blockflag];
1614
a7adcf29
DB
1615 for (j = vc->audio_channels-1;j >= 0; j--) {
1616 ch_floor_ptr = vc->channel_floors + j * blocksize / 2;
1617 ch_res_ptr = vc->channel_residues + res_chan[j] * blocksize / 2;
d5a7229b 1618 vc->fdsp.vector_fmul(ch_floor_ptr, ch_floor_ptr, ch_res_ptr, blocksize / 2);
26f548bb 1619 mdct->imdct_half(mdct, ch_res_ptr, ch_floor_ptr);
07c55d8e
AJ
1620 }
1621
9d2b5cf2 1622// Overlap/add, save data for next overlapping FPMATH
07c55d8e 1623
a7adcf29
DB
1624 retlen = (blocksize + vc->blocksize[previous_window]) / 4;
1625 for (j = 0; j < vc->audio_channels; j++) {
cf3ac543
DB
1626 unsigned bs0 = vc->blocksize[0];
1627 unsigned bs1 = vc->blocksize[1];
a7adcf29
DB
1628 float *residue = vc->channel_residues + res_chan[j] * blocksize / 2;
1629 float *saved = vc->saved + j * bs1 / 4;
1630 float *ret = vc->channel_floors + j * retlen;
1631 float *buf = residue;
1632 const float *win = vc->win[blockflag & previous_window];
1633
1634 if (blockflag == previous_window) {
80ba1ddb 1635 vc->dsp.vector_fmul_window(ret, saved, buf, win, blocksize / 4);
a7adcf29 1636 } else if (blockflag > previous_window) {
80ba1ddb 1637 vc->dsp.vector_fmul_window(ret, saved, buf, win, bs0 / 4);
9d06d7bc 1638 memcpy(ret+bs0/2, buf+bs0/4, ((bs1-bs0)/4) * sizeof(float));
07c55d8e 1639 } else {
9d06d7bc 1640 memcpy(ret, saved, ((bs1 - bs0) / 4) * sizeof(float));
80ba1ddb 1641 vc->dsp.vector_fmul_window(ret + (bs1 - bs0) / 4, saved + (bs1 - bs0) / 4, buf, win, bs0 / 4);
07c55d8e 1642 }
a7adcf29 1643 memcpy(saved, buf + blocksize / 4, blocksize / 4 * sizeof(float));
07c55d8e 1644 }
07c55d8e 1645
f27e1d64
LM
1646 vc->previous_window = blockflag;
1647 return retlen;
07c55d8e
AJ
1648}
1649
1650// Return the decoded audio packet through the standard api
1651
0eea2129
JR
1652static int vorbis_decode_frame(AVCodecContext *avccontext, void *data,
1653 int *got_frame_ptr, AVPacket *avpkt)
07c55d8e 1654{
7a00bbad 1655 const uint8_t *buf = avpkt->data;
a7adcf29 1656 int buf_size = avpkt->size;
b95fbba7 1657 vorbis_context *vc = avccontext->priv_data;
3dc99a18 1658 GetBitContext *gb = &vc->gb;
3c35da2f 1659 const float *channel_ptrs[255];
0eea2129 1660 int i, len, ret;
07c55d8e 1661
df96f22d 1662 av_dlog(NULL, "packet length %d \n", buf_size);
07c55d8e
AJ
1663
1664 init_get_bits(gb, buf, buf_size*8);
1665
f666276f
JR
1666 if ((len = vorbis_parse_audio_packet(vc)) <= 0)
1667 return len;
07c55d8e
AJ
1668
1669 if (!vc->first_frame) {
a7adcf29 1670 vc->first_frame = 1;
0eea2129 1671 *got_frame_ptr = 0;
b95fbba7 1672 return buf_size;
07c55d8e
AJ
1673 }
1674
df96f22d
DB
1675 av_dlog(NULL, "parsed %d bytes %d bits, returned %d samples (*ch*bits) \n",
1676 get_bits_count(gb) / 8, get_bits_count(gb) % 8, len);
07c55d8e 1677
0eea2129
JR
1678 /* get output buffer */
1679 vc->frame.nb_samples = len;
1680 if ((ret = avccontext->get_buffer(avccontext, &vc->frame)) < 0) {
1681 av_log(avccontext, AV_LOG_ERROR, "get_buffer() failed\n");
1682 return ret;
60aa1a35
JR
1683 }
1684
4a27f326 1685 if (vc->audio_channels > 8) {
f640478b
RS
1686 for (i = 0; i < vc->audio_channels; i++)
1687 channel_ptrs[i] = vc->channel_floors + i * len;
53a71e1b
RS
1688 } else {
1689 for (i = 0; i < vc->audio_channels; i++)
1690 channel_ptrs[i] = vc->channel_floors +
1691 len * ff_vorbis_channel_layout_offsets[vc->audio_channels - 1][i];
1692 }
1693
9aa8193a 1694 if (avccontext->sample_fmt == AV_SAMPLE_FMT_FLT)
0eea2129
JR
1695 vc->fmt_conv.float_interleave((float *)vc->frame.data[0], channel_ptrs,
1696 len, vc->audio_channels);
9aa8193a 1697 else
0eea2129
JR
1698 vc->fmt_conv.float_to_int16_interleave((int16_t *)vc->frame.data[0],
1699 channel_ptrs, len,
9aa8193a
JR
1700 vc->audio_channels);
1701
0eea2129
JR
1702 *got_frame_ptr = 1;
1703 *(AVFrame *)data = vc->frame;
07c55d8e 1704
b95fbba7 1705 return buf_size;
07c55d8e
AJ
1706}
1707
1708// Close decoder
1709
5e56b30e
DB
1710static av_cold int vorbis_decode_close(AVCodecContext *avccontext)
1711{
07c55d8e
AJ
1712 vorbis_context *vc = avccontext->priv_data;
1713
1714 vorbis_free(vc);
1715
b95fbba7 1716 return 0;
07c55d8e
AJ
1717}
1718
19adb0bc
JR
1719static av_cold void vorbis_decode_flush(AVCodecContext *avccontext)
1720{
1721 vorbis_context *vc = avccontext->priv_data;
1722
1723 if (vc->saved) {
1724 memset(vc->saved, 0, (vc->blocksize[1] / 4) * vc->audio_channels *
1725 sizeof(*vc->saved));
1726 }
1727 vc->previous_window = 0;
1728}
1729
d36beb3f 1730AVCodec ff_vorbis_decoder = {
00c3b67b
MS
1731 .name = "vorbis",
1732 .type = AVMEDIA_TYPE_AUDIO,
1733 .id = CODEC_ID_VORBIS,
1734 .priv_data_size = sizeof(vorbis_context),
1735 .init = vorbis_decode_init,
1736 .close = vorbis_decode_close,
1737 .decode = vorbis_decode_frame,
1738 .flush = vorbis_decode_flush,
1739 .capabilities = CODEC_CAP_DR1,
1740 .long_name = NULL_IF_CONFIG_SMALL("Vorbis"),
53a71e1b 1741 .channel_layouts = ff_vorbis_channel_layouts,
00c3b67b 1742 .sample_fmts = (const enum AVSampleFormat[]) {
9aa8193a
JR
1743 AV_SAMPLE_FMT_FLT, AV_SAMPLE_FMT_S16, AV_SAMPLE_FMT_NONE
1744 },
07c55d8e 1745};