FFmpeg coverage

Directory: ../../../ffmpeg/
File: src/libavcodec/vorbisdec.c
Date: 2025-06-01 09:29:47
Exec Total Coverage
Lines: 725 913 79.4%
Functions: 20 21 95.2%
Branches: 415 584 71.1%
Line Branch Exec Source
1 /**
2 * @file
3 * Vorbis I decoder
4 * @author Denes Balatoni ( dbalatoni programozo hu )
5 *
6 * This file is part of FFmpeg.
7 *
8 * FFmpeg is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Lesser General Public
10 * License as published by the Free Software Foundation; either
11 * version 2.1 of the License, or (at your option) any later version.
12 *
13 * FFmpeg is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * Lesser General Public License for more details.
17 *
18 * You should have received a copy of the GNU Lesser General Public
19 * License along with FFmpeg; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21 */
22
23 /**
24 * @file
25 * Vorbis I decoder
26 * @author Denes Balatoni ( dbalatoni programozo hu )
27 */
28
29 #include <inttypes.h>
30 #include <math.h>
31
32 #include "libavutil/avassert.h"
33 #include "libavutil/float_dsp.h"
34 #include "libavutil/mem.h"
35 #include "libavutil/tx.h"
36
37 #define BITSTREAM_READER_LE
38 #include "avcodec.h"
39 #include "codec_internal.h"
40 #include "decode.h"
41 #include "get_bits.h"
42 #include "internal.h"
43 #include "vorbis.h"
44 #include "vorbisdsp.h"
45 #include "vorbis_data.h"
46 #include "xiph.h"
47
48 #define V_NB_BITS 8
49 #define V_NB_BITS2 11
50 #define V_MAX_VLCS (1 << 16)
51 #define V_MAX_PARTITIONS (1 << 20)
52
53 typedef struct vorbis_codebook {
54 uint8_t dimensions;
55 uint8_t lookup_type;
56 uint8_t maxdepth;
57 VLC vlc;
58 float *codevectors;
59 unsigned int nb_bits;
60 } vorbis_codebook;
61
62 typedef union vorbis_floor_u vorbis_floor_data;
63 typedef struct vorbis_floor0_s vorbis_floor0;
64 typedef struct vorbis_floor1_s vorbis_floor1;
65 struct vorbis_context_s;
66 typedef
67 int (* vorbis_floor_decode_func)
68 (struct vorbis_context_s *, vorbis_floor_data *, float *);
69 typedef struct vorbis_floor {
70 uint8_t floor_type;
71 vorbis_floor_decode_func decode;
72 union vorbis_floor_u {
73 struct vorbis_floor0_s {
74 uint8_t order;
75 uint16_t rate;
76 uint16_t bark_map_size;
77 int32_t *map[2];
78 uint32_t map_size[2];
79 uint8_t amplitude_bits;
80 uint8_t amplitude_offset;
81 uint8_t num_books;
82 uint8_t *book_list;
83 float *lsp;
84 } t0;
85 struct vorbis_floor1_s {
86 uint8_t partitions;
87 uint8_t partition_class[32];
88 uint8_t class_dimensions[16];
89 uint8_t class_subclasses[16];
90 uint8_t class_masterbook[16];
91 int16_t subclass_books[16][8];
92 uint8_t multiplier;
93 uint16_t x_list_dim;
94 vorbis_floor1_entry *list;
95 } t1;
96 } data;
97 } vorbis_floor;
98
99 typedef struct vorbis_residue {
100 uint16_t type;
101 uint32_t begin;
102 uint32_t end;
103 unsigned partition_size;
104 uint8_t classifications;
105 uint8_t classbook;
106 int16_t books[64][8];
107 uint8_t maxpass;
108 uint16_t ptns_to_read;
109 uint8_t *classifs;
110 } vorbis_residue;
111
112 typedef struct vorbis_mapping {
113 uint8_t submaps;
114 uint16_t coupling_steps;
115 uint8_t *magnitude;
116 uint8_t *angle;
117 uint8_t *mux;
118 uint8_t submap_floor[16];
119 uint8_t submap_residue[16];
120 } vorbis_mapping;
121
122 typedef struct vorbis_mode {
123 uint8_t blockflag;
124 uint16_t windowtype;
125 uint16_t transformtype;
126 uint8_t mapping;
127 } vorbis_mode;
128
129 typedef struct vorbis_context_s {
130 AVCodecContext *avctx;
131 GetBitContext gb;
132 VorbisDSPContext dsp;
133 AVFloatDSPContext *fdsp;
134
135 AVTXContext *mdct[2];
136 av_tx_fn mdct_fn[2];
137
138 uint8_t first_frame;
139 uint32_t version;
140 uint8_t audio_channels;
141 uint32_t audio_samplerate;
142 uint32_t bitrate_maximum;
143 uint32_t bitrate_nominal;
144 uint32_t bitrate_minimum;
145 uint32_t blocksize[2];
146 const float *win[2];
147 uint16_t codebook_count;
148 vorbis_codebook *codebooks;
149 uint8_t floor_count;
150 vorbis_floor *floors;
151 uint8_t residue_count;
152 vorbis_residue *residues;
153 uint8_t mapping_count;
154 vorbis_mapping *mappings;
155 uint8_t mode_count;
156 vorbis_mode *modes;
157 uint8_t mode_number; // mode number for the current packet
158 int8_t previous_window;
159 float *channel_residues;
160 float *saved;
161 } vorbis_context;
162
163 /* Helper functions */
164
165 #define BARK(x) \
166 (13.1f * atan(0.00074f * (x)) + 2.24f * atan(1.85e-8f * (x) * (x)) + 1e-4f * (x))
167
168 static const char idx_err_str[] = "Index value %d out of range (0 - %d) for %s at %s:%i\n";
169 #define VALIDATE_INDEX(idx, limit) \
170 if (idx >= limit) {\
171 av_log(vc->avctx, AV_LOG_ERROR,\
172 idx_err_str,\
173 (int)(idx), (int)(limit - 1), #idx, __FILE__, __LINE__);\
174 return AVERROR_INVALIDDATA;\
175 }
176 #define GET_VALIDATED_INDEX(idx, bits, limit) \
177 {\
178 idx = get_bits(gb, bits);\
179 VALIDATE_INDEX(idx, limit)\
180 }
181
182 1860 static float vorbisfloat2float(unsigned val)
183 {
184 1860 float mant = val & 0x1fffff;
185 1860 int exp = (val & 0x7fe00000) >> 21;
186
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 1860 if (val & 0x80000000)
187 862 mant = -mant;
188 1860 return ldexpf(mant, exp - 20 - 768);
189 }
190
191
192 // Free all allocated memory -----------------------------------------
193
194 69 static void vorbis_free(vorbis_context *vc)
195 {
196 int i;
197
198 69 av_freep(&vc->channel_residues);
199 69 av_freep(&vc->saved);
200 69 av_freep(&vc->fdsp);
201
202
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 69 if (vc->residues)
203
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 207 for (i = 0; i < vc->residue_count; i++)
204 138 av_freep(&vc->residues[i].classifs);
205 69 av_freep(&vc->residues);
206 69 av_freep(&vc->modes);
207
208 69 av_tx_uninit(&vc->mdct[0]);
209 69 av_tx_uninit(&vc->mdct[1]);
210
211
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 69 if (vc->codebooks)
212
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 2220 for (i = 0; i < vc->codebook_count; ++i) {
213 2151 av_freep(&vc->codebooks[i].codevectors);
214 2151 ff_vlc_free(&vc->codebooks[i].vlc);
215 }
216 69 av_freep(&vc->codebooks);
217
218
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 69 if (vc->floors)
219
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 207 for (i = 0; i < vc->floor_count; ++i) {
220
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 138 if (vc->floors[i].floor_type == 0) {
221 44 av_freep(&vc->floors[i].data.t0.map[0]);
222 44 av_freep(&vc->floors[i].data.t0.map[1]);
223 44 av_freep(&vc->floors[i].data.t0.book_list);
224 44 av_freep(&vc->floors[i].data.t0.lsp);
225 } else {
226 94 av_freep(&vc->floors[i].data.t1.list);
227 }
228 }
229 69 av_freep(&vc->floors);
230
231
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 69 if (vc->mappings)
232
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 205 for (i = 0; i < vc->mapping_count; ++i) {
233 136 av_freep(&vc->mappings[i].magnitude);
234 136 av_freep(&vc->mappings[i].angle);
235 136 av_freep(&vc->mappings[i].mux);
236 }
237 69 av_freep(&vc->mappings);
238 69 }
239
240 // Parse setup header -------------------------------------------------
241
242 // Process codebooks part
243
244 69 static int vorbis_parse_setup_hdr_codebooks(vorbis_context *vc)
245 {
246 unsigned cb;
247 69 uint8_t *tmp_vlc_bits = NULL;
248 69 uint32_t *tmp_vlc_codes = NULL;
249 69 GetBitContext *gb = &vc->gb;
250 69 uint16_t *codebook_multiplicands = NULL;
251 69 int ret = 0;
252
253 69 vc->codebook_count = get_bits(gb, 8) + 1;
254
255 ff_dlog(NULL, " Codebooks: %d \n", vc->codebook_count);
256
257 69 vc->codebooks = av_mallocz(vc->codebook_count * sizeof(*vc->codebooks));
258 69 tmp_vlc_bits = av_mallocz(V_MAX_VLCS * sizeof(*tmp_vlc_bits));
259 69 tmp_vlc_codes = av_mallocz(V_MAX_VLCS * sizeof(*tmp_vlc_codes));
260 69 codebook_multiplicands = av_malloc(V_MAX_VLCS * sizeof(*codebook_multiplicands));
261
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 69 if (!vc->codebooks ||
262
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 69 !tmp_vlc_bits || !tmp_vlc_codes || !codebook_multiplicands) {
263 ✗ ret = AVERROR(ENOMEM);
264 ✗ goto error;
265 }
266
267
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 2220 for (cb = 0; cb < vc->codebook_count; ++cb) {
268 2151 vorbis_codebook *codebook_setup = &vc->codebooks[cb];
269 2151 unsigned ordered, t, entries, used_entries = 0;
270
271 ff_dlog(NULL, " %u. Codebook\n", cb);
272
273
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 2151 if (get_bits(gb, 24) != 0x564342) {
274 ✗ av_log(vc->avctx, AV_LOG_ERROR,
275 " %u. Codebook setup data corrupt.\n", cb);
276 ✗ ret = AVERROR_INVALIDDATA;
277 ✗ goto error;
278 }
279
280 2151 codebook_setup->dimensions=get_bits(gb, 16);
281
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 2151 if (codebook_setup->dimensions > 16 || codebook_setup->dimensions == 0) {
282 ✗ av_log(vc->avctx, AV_LOG_ERROR,
283 " %u. Codebook's dimension is invalid (%d).\n",
284 ✗ cb, codebook_setup->dimensions);
285 ✗ ret = AVERROR_INVALIDDATA;
286 ✗ goto error;
287 }
288 2151 entries = get_bits(gb, 24);
289
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 2151 if (entries > V_MAX_VLCS) {
290 ✗ av_log(vc->avctx, AV_LOG_ERROR,
291 " %u. Codebook has too many entries (%u).\n",
292 cb, entries);
293 ✗ ret = AVERROR_INVALIDDATA;
294 ✗ goto error;
295 }
296
297 2151 ordered = get_bits1(gb);
298
299 ff_dlog(NULL, " codebook_dimensions %d, codebook_entries %u\n",
300 codebook_setup->dimensions, entries);
301
302
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 2151 if (!ordered) {
303 unsigned ce, flag;
304 2127 unsigned sparse = get_bits1(gb);
305
306 ff_dlog(NULL, " not ordered \n");
307
308
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 2127 if (sparse) {
309 ff_dlog(NULL, " sparse \n");
310
311 874 used_entries = 0;
312
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 293324 for (ce = 0; ce < entries; ++ce) {
313 292450 flag = get_bits1(gb);
314
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 292450 if (flag) {
315 106468 tmp_vlc_bits[ce] = get_bits(gb, 5) + 1;
316 106468 ++used_entries;
317 } else
318 185982 tmp_vlc_bits[ce] = 0;
319 }
320 } else {
321 ff_dlog(NULL, " not sparse \n");
322
323 1253 used_entries = entries;
324
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 308183 for (ce = 0; ce < entries; ++ce)
325 306930 tmp_vlc_bits[ce] = get_bits(gb, 5) + 1;
326 }
327 } else {
328 24 unsigned current_entry = 0;
329 24 unsigned current_length = get_bits(gb, 5) + 1;
330
331 ff_dlog(NULL, " ordered, current length: %u\n", current_length); //FIXME
332
333 24 used_entries = entries;
334
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 108 for (; current_entry < used_entries && current_length <= 32; ++current_length) {
335 unsigned i, number;
336
337 ff_dlog(NULL, " number bits: %u ", ilog(entries - current_entry));
338
339 84 number = get_bits(gb, ilog(entries - current_entry));
340
341 ff_dlog(NULL, " number: %u\n", number);
342
343
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 986 for (i = current_entry; i < number+current_entry; ++i)
344
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 902 if (i < used_entries)
345 902 tmp_vlc_bits[i] = current_length;
346
347 84 current_entry+=number;
348 }
349
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 24 if (current_entry>used_entries) {
350 ✗ av_log(vc->avctx, AV_LOG_ERROR, " More codelengths than codes in codebook. \n");
351 ✗ ret = AVERROR_INVALIDDATA;
352 ✗ goto error;
353 }
354 }
355
356 2151 codebook_setup->lookup_type = get_bits(gb, 4);
357
358 ff_dlog(NULL, " lookup type: %d : %s \n", codebook_setup->lookup_type,
359 codebook_setup->lookup_type ? "vq" : "no lookup");
360
361 // If the codebook is used for (inverse) VQ, calculate codevectors.
362
363
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 2151 if (codebook_setup->lookup_type == 1) {
364 unsigned i, j, k;
365 930 unsigned codebook_lookup_values = ff_vorbis_nth_root(entries, codebook_setup->dimensions);
366
367 930 float codebook_minimum_value = vorbisfloat2float(get_bits_long(gb, 32));
368 930 float codebook_delta_value = vorbisfloat2float(get_bits_long(gb, 32));
369 930 unsigned codebook_value_bits = get_bits(gb, 4) + 1;
370 930 unsigned codebook_sequence_p = get_bits1(gb);
371
372
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 930 if (!isfinite(codebook_minimum_value) || !isfinite(codebook_delta_value)) {
373 ✗ ret = AVERROR_INVALIDDATA;
374 ✗ goto error;
375 }
376 ff_dlog(NULL, " We expect %d numbers for building the codevectors. \n",
377 codebook_lookup_values);
378 ff_dlog(NULL, " delta %f minmum %f \n",
379 codebook_delta_value, codebook_minimum_value);
380
381
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 18414 for (i = 0; i < codebook_lookup_values; ++i) {
382 17484 codebook_multiplicands[i] = get_bits(gb, codebook_value_bits);
383
384 ff_dlog(NULL, " multiplicands*delta+minmum : %e \n",
385 (float)codebook_multiplicands[i] * codebook_delta_value + codebook_minimum_value);
386 ff_dlog(NULL, " multiplicand %u\n", codebook_multiplicands[i]);
387 }
388
389 // Weed out unused vlcs and build codevector vector
390
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 930 if (used_entries) {
391 930 codebook_setup->codevectors =
392 930 av_calloc(used_entries, codebook_setup->dimensions *
393 sizeof(*codebook_setup->codevectors));
394
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 930 if (!codebook_setup->codevectors) {
395 ✗ ret = AVERROR(ENOMEM);
396 ✗ goto error;
397 }
398 } else
399 ✗ codebook_setup->codevectors = NULL;
400
401
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 500274 for (j = 0, i = 0; i < entries; ++i) {
402 499344 unsigned dim = codebook_setup->dimensions;
403
404
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 499344 if (tmp_vlc_bits[i]) {
405 326500 float last = 0.0;
406 326500 unsigned lookup_offset = i;
407
408 ff_dlog(vc->avctx, "Lookup offset %u ,", i);
409
410
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 1311479 for (k = 0; k < dim; ++k) {
411 984979 unsigned multiplicand_offset = lookup_offset % codebook_lookup_values;
412 984979 codebook_setup->codevectors[j * dim + k] = codebook_multiplicands[multiplicand_offset] * codebook_delta_value + codebook_minimum_value + last;
413
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 984979 if (codebook_sequence_p)
414 257530 last = codebook_setup->codevectors[j * dim + k];
415 984979 lookup_offset/=codebook_lookup_values;
416 }
417 326500 tmp_vlc_bits[j] = tmp_vlc_bits[i];
418
419 ff_dlog(vc->avctx, "real lookup offset %u, vector: ", j);
420
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 1311479 for (k = 0; k < dim; ++k)
421 ff_dlog(vc->avctx, " %f ",
422 codebook_setup->codevectors[j * dim + k]);
423 ff_dlog(vc->avctx, "\n");
424
425 326500 ++j;
426 }
427 }
428
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 930 if (j != used_entries) {
429 ✗ av_log(vc->avctx, AV_LOG_ERROR, "Bug in codevector vector building code. \n");
430 ✗ ret = AVERROR_INVALIDDATA;
431 ✗ goto error;
432 }
433 930 entries = used_entries;
434
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 1221 } else if (codebook_setup->lookup_type >= 2) {
435 ✗ av_log(vc->avctx, AV_LOG_ERROR, "Codebook lookup type not supported. \n");
436 ✗ ret = AVERROR_INVALIDDATA;
437 ✗ goto error;
438 }
439
440 // Initialize VLC table
441
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 2151 if (ff_vorbis_len2vlc(tmp_vlc_bits, tmp_vlc_codes, entries)) {
442 ✗ av_log(vc->avctx, AV_LOG_ERROR, " Invalid code lengths while generating vlcs. \n");
443 ✗ ret = AVERROR_INVALIDDATA;
444 ✗ goto error;
445 }
446 2151 codebook_setup->maxdepth = 0;
447
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 429589 for (t = 0; t < entries; ++t)
448
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 427438 if (tmp_vlc_bits[t] >= codebook_setup->maxdepth)
449 117550 codebook_setup->maxdepth = tmp_vlc_bits[t];
450
451
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 2151 if (codebook_setup->maxdepth > 3 * V_NB_BITS)
452 ✗ codebook_setup->nb_bits = V_NB_BITS2;
453 else
454 2151 codebook_setup->nb_bits = V_NB_BITS;
455
456 2151 codebook_setup->maxdepth = (codebook_setup->maxdepth+codebook_setup->nb_bits - 1) / codebook_setup->nb_bits;
457
458
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 2151 if ((ret = vlc_init(&codebook_setup->vlc, codebook_setup->nb_bits,
459 entries, tmp_vlc_bits, sizeof(*tmp_vlc_bits),
460 sizeof(*tmp_vlc_bits), tmp_vlc_codes,
461 sizeof(*tmp_vlc_codes), sizeof(*tmp_vlc_codes),
462 VLC_INIT_LE))) {
463 ✗ av_log(vc->avctx, AV_LOG_ERROR, " Error generating vlc tables. \n");
464 ✗ goto error;
465 }
466 }
467
468 69 av_free(tmp_vlc_bits);
469 69 av_free(tmp_vlc_codes);
470 69 av_free(codebook_multiplicands);
471 69 return 0;
472
473 // Error:
474 ✗ error:
475 ✗ av_free(tmp_vlc_bits);
476 ✗ av_free(tmp_vlc_codes);
477 ✗ av_free(codebook_multiplicands);
478 ✗ return ret;
479 }
480
481 // Process time domain transforms part (unused in Vorbis I)
482
483 69 static int vorbis_parse_setup_hdr_tdtransforms(vorbis_context *vc)
484 {
485 69 GetBitContext *gb = &vc->gb;
486 69 unsigned i, vorbis_time_count = get_bits(gb, 6) + 1;
487
488
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 138 for (i = 0; i < vorbis_time_count; ++i) {
489 69 unsigned vorbis_tdtransform = get_bits(gb, 16);
490
491 ff_dlog(NULL, " Vorbis time domain transform %u: %u\n",
492 vorbis_time_count, vorbis_tdtransform);
493
494
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 69 if (vorbis_tdtransform) {
495 ✗ av_log(vc->avctx, AV_LOG_ERROR, "Vorbis time domain transform data nonzero. \n");
496 ✗ return AVERROR_INVALIDDATA;
497 }
498 }
499 69 return 0;
500 }
501
502 // Process floors part
503
504 static int vorbis_floor0_decode(vorbis_context *vc,
505 vorbis_floor_data *vfu, float *vec);
506 static int create_map(vorbis_context *vc, unsigned floor_number);
507 static int vorbis_floor1_decode(vorbis_context *vc,
508 vorbis_floor_data *vfu, float *vec);
509 69 static int vorbis_parse_setup_hdr_floors(vorbis_context *vc)
510 {
511 69 GetBitContext *gb = &vc->gb;
512 int i, j, k, ret;
513
514 69 vc->floor_count = get_bits(gb, 6) + 1;
515
516 69 vc->floors = av_mallocz(vc->floor_count * sizeof(*vc->floors));
517
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 69 if (!vc->floors)
518 ✗ return AVERROR(ENOMEM);
519
520
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 207 for (i = 0; i < vc->floor_count; ++i) {
521 138 vorbis_floor *floor_setup = &vc->floors[i];
522
523 138 floor_setup->floor_type = get_bits(gb, 16);
524
525 ff_dlog(NULL, " %d. floor type %d \n", i, floor_setup->floor_type);
526
527
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 138 if (floor_setup->floor_type == 1) {
528 94 int maximum_class = -1;
529 94 unsigned rangebits, rangemax, floor1_values = 2;
530
531 94 floor_setup->decode = vorbis_floor1_decode;
532
533 94 floor_setup->data.t1.partitions = get_bits(gb, 5);
534
535 ff_dlog(NULL, " %d.floor: %d partitions \n",
536 i, floor_setup->data.t1.partitions);
537
538
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 626 for (j = 0; j < floor_setup->data.t1.partitions; ++j) {
539 532 floor_setup->data.t1.partition_class[j] = get_bits(gb, 4);
540
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 532 if (floor_setup->data.t1.partition_class[j] > maximum_class)
541 339 maximum_class = floor_setup->data.t1.partition_class[j];
542
543 ff_dlog(NULL, " %d. floor %d partition class %d \n",
544 i, j, floor_setup->data.t1.partition_class[j]);
545
546 }
547
548 ff_dlog(NULL, " maximum class %d \n", maximum_class);
549
550
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 433 for (j = 0; j <= maximum_class; ++j) {
551 339 floor_setup->data.t1.class_dimensions[j] = get_bits(gb, 3) + 1;
552 339 floor_setup->data.t1.class_subclasses[j] = get_bits(gb, 2);
553
554 ff_dlog(NULL, " %d floor %d class dim: %d subclasses %d \n", i, j,
555 floor_setup->data.t1.class_dimensions[j],
556 floor_setup->data.t1.class_subclasses[j]);
557
558
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 339 if (floor_setup->data.t1.class_subclasses[j]) {
559
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 280 GET_VALIDATED_INDEX(floor_setup->data.t1.class_masterbook[j], 8, vc->codebook_count)
560
561 ff_dlog(NULL, " masterbook: %d \n", floor_setup->data.t1.class_masterbook[j]);
562 }
563
564
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 1306 for (k = 0; k < (1 << floor_setup->data.t1.class_subclasses[j]); ++k) {
565 967 int16_t bits = get_bits(gb, 8) - 1;
566
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 967 if (bits != -1)
567
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 803 VALIDATE_INDEX(bits, vc->codebook_count)
568 967 floor_setup->data.t1.subclass_books[j][k] = bits;
569
570 ff_dlog(NULL, " book %d. : %d \n", k, floor_setup->data.t1.subclass_books[j][k]);
571 }
572 }
573
574 94 floor_setup->data.t1.multiplier = get_bits(gb, 2) + 1;
575 94 floor_setup->data.t1.x_list_dim = 2;
576
577
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 626 for (j = 0; j < floor_setup->data.t1.partitions; ++j)
578 532 floor_setup->data.t1.x_list_dim+=floor_setup->data.t1.class_dimensions[floor_setup->data.t1.partition_class[j]];
579
580 94 floor_setup->data.t1.list = av_calloc(floor_setup->data.t1.x_list_dim,
581 sizeof(*floor_setup->data.t1.list));
582
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 94 if (!floor_setup->data.t1.list)
583 ✗ return AVERROR(ENOMEM);
584
585 94 rangebits = get_bits(gb, 4);
586
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 94 if (!rangebits && floor_setup->data.t1.partitions) {
587 ✗ av_log(vc->avctx, AV_LOG_ERROR,
588 "A rangebits value of 0 is not compliant with the Vorbis I specification.\n");
589 ✗ return AVERROR_INVALIDDATA;
590 }
591 94 rangemax = (1 << rangebits);
592
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 94 if (rangemax > vc->blocksize[1] / 2) {
593 ✗ av_log(vc->avctx, AV_LOG_ERROR,
594 "Floor value is too large for blocksize: %u (%"PRIu32")\n",
595 ✗ rangemax, vc->blocksize[1] / 2);
596 ✗ return AVERROR_INVALIDDATA;
597 }
598 94 floor_setup->data.t1.list[0].x = 0;
599 94 floor_setup->data.t1.list[1].x = rangemax;
600
601
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 626 for (j = 0; j < floor_setup->data.t1.partitions; ++j) {
602
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 2252 for (k = 0; k < floor_setup->data.t1.class_dimensions[floor_setup->data.t1.partition_class[j]]; ++k, ++floor1_values) {
603 1720 floor_setup->data.t1.list[floor1_values].x = get_bits(gb, rangebits);
604
605 ff_dlog(NULL, " %u. floor1 Y coord. %d\n", floor1_values,
606 floor_setup->data.t1.list[floor1_values].x);
607 }
608 }
609
610 // Precalculate order of x coordinates - needed for decode
611
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 94 if (ff_vorbis_ready_floor1_list(vc->avctx,
612 floor_setup->data.t1.list,
613 94 floor_setup->data.t1.x_list_dim)) {
614 ✗ return AVERROR_INVALIDDATA;
615 }
616
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 44 } else if (floor_setup->floor_type == 0) {
617 44 unsigned max_codebook_dim = 0;
618
619 44 floor_setup->decode = vorbis_floor0_decode;
620
621 44 floor_setup->data.t0.order = get_bits(gb, 8);
622
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 44 if (!floor_setup->data.t0.order) {
623 ✗ av_log(vc->avctx, AV_LOG_ERROR, "Floor 0 order is 0.\n");
624 ✗ return AVERROR_INVALIDDATA;
625 }
626 44 floor_setup->data.t0.rate = get_bits(gb, 16);
627
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 44 if (!floor_setup->data.t0.rate) {
628 ✗ av_log(vc->avctx, AV_LOG_ERROR, "Floor 0 rate is 0.\n");
629 ✗ return AVERROR_INVALIDDATA;
630 }
631 44 floor_setup->data.t0.bark_map_size = get_bits(gb, 16);
632
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 44 if (!floor_setup->data.t0.bark_map_size) {
633 ✗ av_log(vc->avctx, AV_LOG_ERROR,
634 "Floor 0 bark map size is 0.\n");
635 ✗ return AVERROR_INVALIDDATA;
636 }
637 44 floor_setup->data.t0.amplitude_bits = get_bits(gb, 6);
638 44 floor_setup->data.t0.amplitude_offset = get_bits(gb, 8);
639 44 floor_setup->data.t0.num_books = get_bits(gb, 4) + 1;
640
641 /* allocate mem for booklist */
642 44 floor_setup->data.t0.book_list =
643 44 av_malloc(floor_setup->data.t0.num_books);
644
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 44 if (!floor_setup->data.t0.book_list)
645 ✗ return AVERROR(ENOMEM);
646 /* read book indexes */
647 {
648 int idx;
649 unsigned book_idx;
650
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 112 for (idx = 0; idx < floor_setup->data.t0.num_books; ++idx) {
651
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 68 GET_VALIDATED_INDEX(book_idx, 8, vc->codebook_count)
652 68 floor_setup->data.t0.book_list[idx] = book_idx;
653
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 68 if (vc->codebooks[book_idx].dimensions > max_codebook_dim)
654 68 max_codebook_dim = vc->codebooks[book_idx].dimensions;
655 }
656 }
657
658
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 44 if ((ret = create_map(vc, i)) < 0)
659 ✗ return ret;
660
661 /* codebook dim is for padding if codebook dim doesn't *
662 * divide order+1 then we need to read more data */
663 44 floor_setup->data.t0.lsp =
664 44 av_malloc_array((floor_setup->data.t0.order + 1 + max_codebook_dim),
665 sizeof(*floor_setup->data.t0.lsp));
666
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 44 if (!floor_setup->data.t0.lsp)
667 ✗ return AVERROR(ENOMEM);
668
669 /* debug output parsed headers */
670 ff_dlog(NULL, "floor0 order: %u\n", floor_setup->data.t0.order);
671 ff_dlog(NULL, "floor0 rate: %u\n", floor_setup->data.t0.rate);
672 ff_dlog(NULL, "floor0 bark map size: %u\n",
673 floor_setup->data.t0.bark_map_size);
674 ff_dlog(NULL, "floor0 amplitude bits: %u\n",
675 floor_setup->data.t0.amplitude_bits);
676 ff_dlog(NULL, "floor0 amplitude offset: %u\n",
677 floor_setup->data.t0.amplitude_offset);
678 ff_dlog(NULL, "floor0 number of books: %u\n",
679 floor_setup->data.t0.num_books);
680 ff_dlog(NULL, "floor0 book list pointer: %p\n",
681 floor_setup->data.t0.book_list);
682 {
683 int idx;
684
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 112 for (idx = 0; idx < floor_setup->data.t0.num_books; ++idx) {
685 ff_dlog(NULL, " Book %d: %u\n", idx + 1,
686 floor_setup->data.t0.book_list[idx]);
687 }
688 }
689 } else {
690 ✗ av_log(vc->avctx, AV_LOG_ERROR, "Invalid floor type!\n");
691 ✗ return AVERROR_INVALIDDATA;
692 }
693 }
694 69 return 0;
695 }
696
697 // Process residues part
698
699 69 static int vorbis_parse_setup_hdr_residues(vorbis_context *vc)
700 {
701 69 GetBitContext *gb = &vc->gb;
702 unsigned i, j, k;
703
704 69 vc->residue_count = get_bits(gb, 6)+1;
705 69 vc->residues = av_mallocz(vc->residue_count * sizeof(*vc->residues));
706
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 69 if (!vc->residues)
707 ✗ return AVERROR(ENOMEM);
708
709 ff_dlog(NULL, " There are %d residues. \n", vc->residue_count);
710
711
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 207 for (i = 0; i < vc->residue_count; ++i) {
712 138 vorbis_residue *res_setup = &vc->residues[i];
713 uint8_t cascade[64];
714 unsigned high_bits, low_bits;
715
716 138 res_setup->type = get_bits(gb, 16);
717
718 ff_dlog(NULL, " %u. residue type %d\n", i, res_setup->type);
719
720 138 res_setup->begin = get_bits(gb, 24);
721 138 res_setup->end = get_bits(gb, 24);
722 138 res_setup->partition_size = get_bits(gb, 24) + 1;
723 /* Validations to prevent a buffer overflow later. */
724
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 138 if (res_setup->begin>res_setup->end ||
725
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 138 (res_setup->end-res_setup->begin) / res_setup->partition_size > FFMIN(V_MAX_PARTITIONS, 65535)) {
726 ✗ av_log(vc->avctx, AV_LOG_ERROR,
727 "partition out of bounds: type, begin, end, size, blocksize: %"PRIu16", %"PRIu32", %"PRIu32", %u, %"PRIu32"\n",
728 ✗ res_setup->type, res_setup->begin, res_setup->end,
729 ✗ res_setup->partition_size, vc->blocksize[1] / 2);
730 ✗ return AVERROR_INVALIDDATA;
731 }
732
733 138 res_setup->classifications = get_bits(gb, 6) + 1;
734
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 138 GET_VALIDATED_INDEX(res_setup->classbook, 8, vc->codebook_count)
735
736 138 res_setup->ptns_to_read =
737 138 (res_setup->end - res_setup->begin) / res_setup->partition_size;
738 276 res_setup->classifs = av_malloc_array(res_setup->ptns_to_read,
739 138 vc->audio_channels *
740 sizeof(*res_setup->classifs));
741
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 138 if (!res_setup->classifs)
742 ✗ return AVERROR(ENOMEM);
743
744 ff_dlog(NULL, " begin %"PRIu32" end %"PRIu32" part.size %u classif.s %"PRIu8" classbook %"PRIu8"\n",
745 res_setup->begin, res_setup->end, res_setup->partition_size,
746 res_setup->classifications, res_setup->classbook);
747
748
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 1330 for (j = 0; j < res_setup->classifications; ++j) {
749 1192 high_bits = 0;
750 1192 low_bits = get_bits(gb, 3);
751
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 1192 if (get_bits1(gb))
752 4 high_bits = get_bits(gb, 5);
753 1192 cascade[j] = (high_bits << 3) + low_bits;
754
755 ff_dlog(NULL, " %u class cascade depth: %d\n", j, ilog(cascade[j]));
756 }
757
758 138 res_setup->maxpass = 0;
759
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 1330 for (j = 0; j < res_setup->classifications; ++j) {
760
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 10728 for (k = 0; k < 8; ++k) {
761
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 9536 if (cascade[j]&(1 << k)) {
762
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 1408 GET_VALIDATED_INDEX(res_setup->books[j][k], 8, vc->codebook_count)
763
764 ff_dlog(NULL, " %u class cascade depth %u book: %d\n",
765 j, k, res_setup->books[j][k]);
766
767
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 1408 if (k>res_setup->maxpass)
768 112 res_setup->maxpass = k;
769 } else {
770 8128 res_setup->books[j][k] = -1;
771 }
772 }
773 }
774 }
775 69 return 0;
776 }
777
778 // Process mappings part
779
780 69 static int vorbis_parse_setup_hdr_mappings(vorbis_context *vc)
781 {
782 69 GetBitContext *gb = &vc->gb;
783 unsigned i, j;
784
785 69 vc->mapping_count = get_bits(gb, 6)+1;
786 69 vc->mappings = av_mallocz(vc->mapping_count * sizeof(*vc->mappings));
787
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 69 if (!vc->mappings)
788 ✗ return AVERROR(ENOMEM);
789
790 ff_dlog(NULL, " There are %d mappings. \n", vc->mapping_count);
791
792
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 205 for (i = 0; i < vc->mapping_count; ++i) {
793 136 vorbis_mapping *mapping_setup = &vc->mappings[i];
794
795
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 136 if (get_bits(gb, 16)) {
796 ✗ av_log(vc->avctx, AV_LOG_ERROR, "Other mappings than type 0 are not compliant with the Vorbis I specification. \n");
797 ✗ return AVERROR_INVALIDDATA;
798 }
799
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 136 if (get_bits1(gb)) {
800 4 mapping_setup->submaps = get_bits(gb, 4) + 1;
801 } else {
802 132 mapping_setup->submaps = 1;
803 }
804
805
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 136 if (get_bits1(gb)) {
806 50 mapping_setup->coupling_steps = get_bits(gb, 8) + 1;
807
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 50 if (vc->audio_channels < 2) {
808 ✗ av_log(vc->avctx, AV_LOG_ERROR,
809 "Square polar channel mapping with less than two channels is not compliant with the Vorbis I specification.\n");
810 ✗ return AVERROR_INVALIDDATA;
811 }
812 50 mapping_setup->magnitude = av_mallocz(mapping_setup->coupling_steps *
813 sizeof(*mapping_setup->magnitude));
814 50 mapping_setup->angle = av_mallocz(mapping_setup->coupling_steps *
815 sizeof(*mapping_setup->angle));
816
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 50 if (!mapping_setup->angle || !mapping_setup->magnitude)
817 ✗ return AVERROR(ENOMEM);
818
819
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 112 for (j = 0; j < mapping_setup->coupling_steps; ++j) {
820
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 62 GET_VALIDATED_INDEX(mapping_setup->magnitude[j], ilog(vc->audio_channels - 1), vc->audio_channels)
821
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 62 GET_VALIDATED_INDEX(mapping_setup->angle[j], ilog(vc->audio_channels - 1), vc->audio_channels)
822 }
823 } else {
824 86 mapping_setup->coupling_steps = 0;
825 }
826
827 ff_dlog(NULL, " %u mapping coupling steps: %d\n",
828 i, mapping_setup->coupling_steps);
829
830
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 136 if (get_bits(gb, 2)) {
831 ✗ av_log(vc->avctx, AV_LOG_ERROR, "%u. mapping setup data invalid.\n", i);
832 ✗ return AVERROR_INVALIDDATA; // following spec.
833 }
834
835
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 136 if (mapping_setup->submaps>1) {
836 4 mapping_setup->mux = av_calloc(vc->audio_channels,
837 sizeof(*mapping_setup->mux));
838
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 4 if (!mapping_setup->mux)
839 ✗ return AVERROR(ENOMEM);
840
841
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 28 for (j = 0; j < vc->audio_channels; ++j)
842 24 mapping_setup->mux[j] = get_bits(gb, 4);
843 }
844
845
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 276 for (j = 0; j < mapping_setup->submaps; ++j) {
846 140 skip_bits(gb, 8); // FIXME check?
847
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 140 GET_VALIDATED_INDEX(mapping_setup->submap_floor[j], 8, vc->floor_count)
848
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 140 GET_VALIDATED_INDEX(mapping_setup->submap_residue[j], 8, vc->residue_count)
849
850 ff_dlog(NULL, " %u mapping %u submap : floor %d, residue %d\n", i, j,
851 mapping_setup->submap_floor[j],
852 mapping_setup->submap_residue[j]);
853 }
854 }
855 69 return 0;
856 }
857
858 // Process modes part
859
860 44 static int create_map(vorbis_context *vc, unsigned floor_number)
861 {
862 44 vorbis_floor *floors = vc->floors;
863 vorbis_floor0 *vf;
864 int idx;
865 int blockflag, n;
866 int32_t *map;
867
868
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 132 for (blockflag = 0; blockflag < 2; ++blockflag) {
869 88 n = vc->blocksize[blockflag] / 2;
870 176 floors[floor_number].data.t0.map[blockflag] =
871 88 av_malloc_array(n + 1, sizeof(int32_t)); // n + sentinel
872
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 88 if (!floors[floor_number].data.t0.map[blockflag])
873 ✗ return AVERROR(ENOMEM);
874
875 88 map = floors[floor_number].data.t0.map[blockflag];
876 88 vf = &floors[floor_number].data.t0;
877
878
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 51288 for (idx = 0; idx < n; ++idx) {
879 51200 map[idx] = floor(BARK((vf->rate * idx) / (2.0f * n)) *
880 51200 (vf->bark_map_size / BARK(vf->rate / 2.0f)));
881
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 51200 if (vf->bark_map_size-1 < map[idx])
882 ✗ map[idx] = vf->bark_map_size - 1;
883 }
884 88 map[n] = -1;
885 88 vf->map_size[blockflag] = n;
886 }
887
888
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 45144 for (idx = 0; idx <= n; ++idx) {
889 ff_dlog(NULL, "floor0 map: map at pos %d is %"PRId32"\n", idx, map[idx]);
890 }
891
892 44 return 0;
893 }
894
895 69 static int vorbis_parse_setup_hdr_modes(vorbis_context *vc)
896 {
897 69 GetBitContext *gb = &vc->gb;
898 unsigned i;
899
900 69 vc->mode_count = get_bits(gb, 6) + 1;
901 69 vc->modes = av_mallocz(vc->mode_count * sizeof(*vc->modes));
902
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 69 if (!vc->modes)
903 ✗ return AVERROR(ENOMEM);
904
905 ff_dlog(NULL, " There are %d modes.\n", vc->mode_count);
906
907
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 207 for (i = 0; i < vc->mode_count; ++i) {
908 138 vorbis_mode *mode_setup = &vc->modes[i];
909
910 138 mode_setup->blockflag = get_bits1(gb);
911 138 mode_setup->windowtype = get_bits(gb, 16); //FIXME check
912 138 mode_setup->transformtype = get_bits(gb, 16); //FIXME check
913
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 138 GET_VALIDATED_INDEX(mode_setup->mapping, 8, vc->mapping_count);
914
915 ff_dlog(NULL, " %u mode: blockflag %d, windowtype %d, transformtype %d, mapping %d\n",
916 i, mode_setup->blockflag, mode_setup->windowtype,
917 mode_setup->transformtype, mode_setup->mapping);
918 }
919 69 return 0;
920 }
921
922 // Process the whole setup header using the functions above
923
924 69 static int vorbis_parse_setup_hdr(vorbis_context *vc)
925 {
926 69 GetBitContext *gb = &vc->gb;
927 int ret;
928
929
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 138 if ((get_bits(gb, 8) != 'v') || (get_bits(gb, 8) != 'o') ||
930
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 207 (get_bits(gb, 8) != 'r') || (get_bits(gb, 8) != 'b') ||
931
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 138 (get_bits(gb, 8) != 'i') || (get_bits(gb, 8) != 's')) {
932 ✗ av_log(vc->avctx, AV_LOG_ERROR, " Vorbis setup header packet corrupt (no vorbis signature). \n");
933 ✗ return AVERROR_INVALIDDATA;
934 }
935
936
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 69 if ((ret = vorbis_parse_setup_hdr_codebooks(vc))) {
937 ✗ av_log(vc->avctx, AV_LOG_ERROR, " Vorbis setup header packet corrupt (codebooks). \n");
938 ✗ return ret;
939 }
940
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 69 if ((ret = vorbis_parse_setup_hdr_tdtransforms(vc))) {
941 ✗ av_log(vc->avctx, AV_LOG_ERROR, " Vorbis setup header packet corrupt (time domain transforms). \n");
942 ✗ return ret;
943 }
944
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 69 if ((ret = vorbis_parse_setup_hdr_floors(vc))) {
945 ✗ av_log(vc->avctx, AV_LOG_ERROR, " Vorbis setup header packet corrupt (floors). \n");
946 ✗ return ret;
947 }
948
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 69 if ((ret = vorbis_parse_setup_hdr_residues(vc))) {
949 ✗ av_log(vc->avctx, AV_LOG_ERROR, " Vorbis setup header packet corrupt (residues). \n");
950 ✗ return ret;
951 }
952
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 69 if ((ret = vorbis_parse_setup_hdr_mappings(vc))) {
953 ✗ av_log(vc->avctx, AV_LOG_ERROR, " Vorbis setup header packet corrupt (mappings). \n");
954 ✗ return ret;
955 }
956
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 69 if ((ret = vorbis_parse_setup_hdr_modes(vc))) {
957 ✗ av_log(vc->avctx, AV_LOG_ERROR, " Vorbis setup header packet corrupt (modes). \n");
958 ✗ return ret;
959 }
960
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 69 if (!get_bits1(gb)) {
961 ✗ av_log(vc->avctx, AV_LOG_ERROR, " Vorbis setup header packet corrupt (framing flag). \n");
962 ✗ return AVERROR_INVALIDDATA; // framing flag bit unset error
963 }
964
965 69 return 0;
966 }
967
968 // Process the identification header
969
970 69 static int vorbis_parse_id_hdr(vorbis_context *vc)
971 {
972 69 GetBitContext *gb = &vc->gb;
973 unsigned bl0, bl1;
974 69 float scale = -1.0;
975 int ret;
976
977
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 138 if ((get_bits(gb, 8) != 'v') || (get_bits(gb, 8) != 'o') ||
978
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 207 (get_bits(gb, 8) != 'r') || (get_bits(gb, 8) != 'b') ||
979
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 138 (get_bits(gb, 8) != 'i') || (get_bits(gb, 8) != 's')) {
980 ✗ av_log(vc->avctx, AV_LOG_ERROR, " Vorbis id header packet corrupt (no vorbis signature). \n");
981 ✗ return AVERROR_INVALIDDATA;
982 }
983
984 69 vc->version = get_bits_long(gb, 32); //FIXME check 0
985 69 vc->audio_channels = get_bits(gb, 8);
986
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 69 if (vc->audio_channels <= 0) {
987 ✗ av_log(vc->avctx, AV_LOG_ERROR, "Invalid number of channels\n");
988 ✗ return AVERROR_INVALIDDATA;
989 }
990 69 vc->audio_samplerate = get_bits_long(gb, 32);
991
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 69 if (vc->audio_samplerate <= 0) {
992 ✗ av_log(vc->avctx, AV_LOG_ERROR, "Invalid samplerate\n");
993 ✗ return AVERROR_INVALIDDATA;
994 }
995 69 vc->bitrate_maximum = get_bits_long(gb, 32);
996 69 vc->bitrate_nominal = get_bits_long(gb, 32);
997 69 vc->bitrate_minimum = get_bits_long(gb, 32);
998 69 bl0 = get_bits(gb, 4);
999 69 bl1 = get_bits(gb, 4);
1000
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 69 if (bl0 > 13 || bl0 < 6 || bl1 > 13 || bl1 < 6 || bl1 < bl0) {
1001 ✗ av_log(vc->avctx, AV_LOG_ERROR, " Vorbis id header packet corrupt (illegal blocksize). \n");
1002 ✗ return AVERROR_INVALIDDATA;
1003 }
1004 69 vc->blocksize[0] = (1 << bl0);
1005 69 vc->blocksize[1] = (1 << bl1);
1006 69 vc->win[0] = ff_vorbis_vwin[bl0 - 6];
1007 69 vc->win[1] = ff_vorbis_vwin[bl1 - 6];
1008
1009
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 69 if ((get_bits1(gb)) == 0) {
1010 ✗ av_log(vc->avctx, AV_LOG_ERROR, " Vorbis id header packet corrupt (framing flag not set). \n");
1011 ✗ return AVERROR_INVALIDDATA;
1012 }
1013
1014 69 vc->channel_residues = av_malloc_array(vc->blocksize[1] / 2, vc->audio_channels * sizeof(*vc->channel_residues));
1015 69 vc->saved = av_calloc(vc->blocksize[1] / 4, vc->audio_channels * sizeof(*vc->saved));
1016
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 69 if (!vc->channel_residues || !vc->saved)
1017 ✗ return AVERROR(ENOMEM);
1018
1019 69 vc->previous_window = -1;
1020
1021 69 ret = av_tx_init(&vc->mdct[0], &vc->mdct_fn[0], AV_TX_FLOAT_MDCT, 1,
1022 69 vc->blocksize[0] >> 1, &scale, 0);
1023
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 69 if (ret < 0)
1024 ✗ return ret;
1025
1026 69 ret = av_tx_init(&vc->mdct[1], &vc->mdct_fn[1], AV_TX_FLOAT_MDCT, 1,
1027 69 vc->blocksize[1] >> 1, &scale, 0);
1028
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 69 if (ret < 0)
1029 ✗ return ret;
1030
1031 69 vc->fdsp = avpriv_float_dsp_alloc(vc->avctx->flags & AV_CODEC_FLAG_BITEXACT);
1032
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 69 if (!vc->fdsp)
1033 ✗ return AVERROR(ENOMEM);
1034
1035 ff_dlog(NULL, " vorbis version %"PRIu32" \n audio_channels %"PRIu8" \n audio_samplerate %"PRIu32" \n bitrate_max %"PRIu32" \n bitrate_nom %"PRIu32" \n bitrate_min %"PRIu32" \n blk_0 %"PRIu32" blk_1 %"PRIu32" \n ",
1036 vc->version, vc->audio_channels, vc->audio_samplerate, vc->bitrate_maximum, vc->bitrate_nominal, vc->bitrate_minimum, vc->blocksize[0], vc->blocksize[1]);
1037
1038 /*
1039 BLK = vc->blocksize[0];
1040 for (i = 0; i < BLK / 2; ++i) {
1041 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)));
1042 }
1043 */
1044
1045 69 return 0;
1046 }
1047
1048 // Process the extradata using the functions above (identification header, setup header)
1049
1050 68 static av_cold int vorbis_decode_init(AVCodecContext *avctx)
1051 {
1052 68 vorbis_context *vc = avctx->priv_data;
1053 68 uint8_t *headers = avctx->extradata;
1054 68 int headers_len = avctx->extradata_size;
1055 const uint8_t *header_start[3];
1056 int header_len[3];
1057 68 GetBitContext *gb = &vc->gb;
1058 int hdr_type, ret;
1059
1060 68 vc->avctx = avctx;
1061 68 ff_vorbisdsp_init(&vc->dsp);
1062
1063 68 avctx->sample_fmt = AV_SAMPLE_FMT_FLTP;
1064
1065
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 68 if (!headers_len) {
1066 ✗ av_log(avctx, AV_LOG_ERROR, "Extradata missing.\n");
1067 ✗ return AVERROR_INVALIDDATA;
1068 }
1069
1070
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 68 if ((ret = avpriv_split_xiph_headers(headers, headers_len, 30, header_start, header_len)) < 0) {
1071 ✗ av_log(avctx, AV_LOG_ERROR, "Extradata corrupt.\n");
1072 ✗ return ret;
1073 }
1074
1075 68 init_get_bits(gb, header_start[0], header_len[0]*8);
1076 68 hdr_type = get_bits(gb, 8);
1077
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 68 if (hdr_type != 1) {
1078 ✗ av_log(avctx, AV_LOG_ERROR, "First header is not the id header.\n");
1079 ✗ return AVERROR_INVALIDDATA;
1080 }
1081
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 68 if ((ret = vorbis_parse_id_hdr(vc))) {
1082 ✗ av_log(avctx, AV_LOG_ERROR, "Id header corrupt.\n");
1083 ✗ vorbis_free(vc);
1084 ✗ return ret;
1085 }
1086
1087 68 init_get_bits(gb, header_start[2], header_len[2]*8);
1088 68 hdr_type = get_bits(gb, 8);
1089
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 68 if (hdr_type != 5) {
1090 ✗ av_log(avctx, AV_LOG_ERROR, "Third header is not the setup header.\n");
1091 ✗ vorbis_free(vc);
1092 ✗ return AVERROR_INVALIDDATA;
1093 }
1094
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 68 if ((ret = vorbis_parse_setup_hdr(vc))) {
1095 ✗ av_log(avctx, AV_LOG_ERROR, "Setup header corrupt.\n");
1096 ✗ vorbis_free(vc);
1097 ✗ return ret;
1098 }
1099
1100 68 av_channel_layout_uninit(&avctx->ch_layout);
1101
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 68 if (vc->audio_channels > 8) {
1102 ✗ avctx->ch_layout.order = AV_CHANNEL_ORDER_UNSPEC;
1103 ✗ avctx->ch_layout.nb_channels = vc->audio_channels;
1104 } else {
1105 68 av_channel_layout_copy(&avctx->ch_layout, &ff_vorbis_ch_layouts[vc->audio_channels - 1]);
1106 }
1107
1108 68 avctx->sample_rate = vc->audio_samplerate;
1109
1110 68 return 0;
1111 }
1112
1113 // Decode audiopackets -------------------------------------------------
1114
1115 // Read and decode floor
1116
1117 6375 static int vorbis_floor0_decode(vorbis_context *vc,
1118 vorbis_floor_data *vfu, float *vec)
1119 {
1120 6375 vorbis_floor0 *vf = &vfu->t0;
1121 6375 float *lsp = vf->lsp;
1122 unsigned book_idx;
1123 uint64_t amplitude;
1124 6375 unsigned blockflag = vc->modes[vc->mode_number].blockflag;
1125
1126
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 6375 if (!vf->amplitude_bits)
1127 ✗ return 1;
1128
1129 6375 amplitude = get_bits64(&vc->gb, vf->amplitude_bits);
1130
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 6375 if (amplitude > 0) {
1131 6251 float last = 0;
1132 6251 unsigned idx, lsp_len = 0;
1133 vorbis_codebook codebook;
1134
1135 6251 book_idx = get_bits(&vc->gb, ilog(vf->num_books));
1136
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 6251 if (book_idx >= vf->num_books) {
1137 ✗ av_log(vc->avctx, AV_LOG_ERROR, "floor0 dec: booknumber too high!\n");
1138 ✗ book_idx = 0;
1139 }
1140 ff_dlog(NULL, "floor0 dec: booknumber: %u\n", book_idx);
1141 6251 codebook = vc->codebooks[vf->book_list[book_idx]];
1142 /* Invalid codebook! */
1143
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 6251 if (!codebook.codevectors)
1144 ✗ return AVERROR_INVALIDDATA;
1145
1146
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 56599 while (lsp_len<vf->order) {
1147 int vec_off;
1148
1149 ff_dlog(NULL, "floor0 dec: book dimension: %d\n", codebook.dimensions);
1150 ff_dlog(NULL, "floor0 dec: maximum depth: %d\n", codebook.maxdepth);
1151 /* read temp vector */
1152 50348 vec_off = get_vlc2(&vc->gb, codebook.vlc.table,
1153 50348 codebook.nb_bits, 3);
1154
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 50348 if (vec_off < 0)
1155 ✗ return AVERROR_INVALIDDATA;
1156 50348 vec_off *= codebook.dimensions;
1157 ff_dlog(NULL, "floor0 dec: vector offset: %d\n", vec_off);
1158 /* copy each vector component and add last to it */
1159
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 195920 for (idx = 0; idx < codebook.dimensions; ++idx)
1160 145572 lsp[lsp_len+idx] = codebook.codevectors[vec_off+idx] + last;
1161 50348 last = lsp[lsp_len+idx-1]; /* set last to last vector component */
1162
1163 50348 lsp_len += codebook.dimensions;
1164 }
1165 /* DEBUG: output lsp coeffs */
1166 {
1167 int idx;
1168
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 151823 for (idx = 0; idx < lsp_len; ++idx)
1169 ff_dlog(NULL, "floor0 dec: coeff at %d is %f\n", idx, lsp[idx]);
1170 }
1171
1172 /* synthesize floor output vector */
1173 {
1174 int i;
1175 6251 int order = vf->order;
1176 6251 float wstep = M_PI / vf->bark_map_size;
1177
1178
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 151823 for (i = 0; i < order; i++)
1179 145572 lsp[i] = 2.0f * cos(lsp[i]);
1180
1181 ff_dlog(NULL, "floor0 synth: map_size = %"PRIu32"; m = %d; wstep = %f\n",
1182 vf->map_size[blockflag], order, wstep);
1183
1184 6251 i = 0;
1185
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 945341 while (i < vf->map_size[blockflag]) {
1186 939090 int j, iter_cond = vf->map[blockflag][i];
1187 939090 float p = 0.5f;
1188 939090 float q = 0.5f;
1189 939090 float two_cos_w = 2.0f * cos(wstep * iter_cond); // needed all times
1190
1191 /* similar part for the q and p products */
1192
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 14107686 for (j = 0; j + 1 < order; j += 2) {
1193 13168596 q *= lsp[j] - two_cos_w;
1194 13168596 p *= lsp[j + 1] - two_cos_w;
1195 }
1196
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 939090 if (j == order) { // even order
1197 925416 p *= p * (2.0f - two_cos_w);
1198 925416 q *= q * (2.0f + two_cos_w);
1199 } else { // odd order
1200 13674 q *= two_cos_w-lsp[j]; // one more time for q
1201
1202 /* final step and square */
1203 13674 p *= p * (4.f - two_cos_w * two_cos_w);
1204 13674 q *= q;
1205 }
1206
1207
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 939090 if (p + q == 0.0)
1208 ✗ return AVERROR_INVALIDDATA;
1209
1210 /* calculate linear floor value */
1211 939090 q = exp((((amplitude*vf->amplitude_offset) /
1212 939090 (((1ULL << vf->amplitude_bits) - 1) * sqrt(p + q)))
1213 939090 - vf->amplitude_offset) * .11512925f);
1214
1215 /* fill vector */
1216 do {
1217 4384000 vec[i] = q; ++i;
1218
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 4384000 } while (vf->map[blockflag][i] == iter_cond);
1219 }
1220 }
1221 } else {
1222 /* this channel is unused */
1223 124 return 1;
1224 }
1225
1226 ff_dlog(NULL, " Floor0 decoded\n");
1227
1228 6251 return 0;
1229 }
1230
1231 11470 static int vorbis_floor1_decode(vorbis_context *vc,
1232 vorbis_floor_data *vfu, float *vec)
1233 {
1234 11470 vorbis_floor1 *vf = &vfu->t1;
1235 11470 GetBitContext *gb = &vc->gb;
1236 11470 uint16_t range_v[4] = { 256, 128, 86, 64 };
1237 11470 unsigned range = range_v[vf->multiplier - 1];
1238 uint16_t floor1_Y[258];
1239 uint16_t floor1_Y_final[258];
1240 int floor1_flag[258];
1241 unsigned partition_class, cdim, cbits, csub, cval, offset, i, j;
1242 int book, adx, ady, dy, off, predicted, err;
1243
1244
1245
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 11470 if (!get_bits1(gb)) // silence
1246 2001 return 1;
1247
1248 // Read values (or differences) for the floor's points
1249
1250 9469 floor1_Y[0] = get_bits(gb, ilog(range - 1));
1251 9469 floor1_Y[1] = get_bits(gb, ilog(range - 1));
1252
1253 ff_dlog(NULL, "floor 0 Y %d floor 1 Y %d \n", floor1_Y[0], floor1_Y[1]);
1254
1255 9469 offset = 2;
1256
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 78294 for (i = 0; i < vf->partitions; ++i) {
1257 68825 partition_class = vf->partition_class[i];
1258 68825 cdim = vf->class_dimensions[partition_class];
1259 68825 cbits = vf->class_subclasses[partition_class];
1260 68825 csub = (1 << cbits) - 1;
1261 68825 cval = 0;
1262
1263 ff_dlog(NULL, "Cbits %u\n", cbits);
1264
1265
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 68825 if (cbits) // this reads all subclasses for this partition's class
1266 62899 cval = get_vlc2(gb, vc->codebooks[vf->class_masterbook[partition_class]].vlc.table,
1267 62899 vc->codebooks[vf->class_masterbook[partition_class]].nb_bits, 3);
1268
1269
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 285384 for (j = 0; j < cdim; ++j) {
1270 216559 book = vf->subclass_books[partition_class][cval & csub];
1271
1272 ff_dlog(NULL, "book %d Cbits %u cval %u bits:%d\n",
1273 book, cbits, cval, get_bits_count(gb));
1274
1275 216559 cval = cval >> cbits;
1276
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 216559 if (book > -1) {
1277 114005 int v = get_vlc2(gb, vc->codebooks[book].vlc.table,
1278 114005 vc->codebooks[book].nb_bits, 3);
1279
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 114005 if (v < 0)
1280 ✗ return AVERROR_INVALIDDATA;
1281 114005 floor1_Y[offset+j] = v;
1282 } else {
1283 102554 floor1_Y[offset+j] = 0;
1284 }
1285
1286 ff_dlog(NULL, " floor(%d) = %d \n",
1287 vf->list[offset+j].x, floor1_Y[offset+j]);
1288 }
1289 68825 offset+=cdim;
1290 }
1291
1292 // Amplitude calculation from the differences
1293
1294 9469 floor1_flag[0] = 1;
1295 9469 floor1_flag[1] = 1;
1296 9469 floor1_Y_final[0] = floor1_Y[0];
1297 9469 floor1_Y_final[1] = floor1_Y[1];
1298
1299
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 226028 for (i = 2; i < vf->x_list_dim; ++i) {
1300 unsigned val, highroom, lowroom, room, high_neigh_offs, low_neigh_offs;
1301
1302 216559 low_neigh_offs = vf->list[i].low;
1303 216559 high_neigh_offs = vf->list[i].high;
1304 216559 dy = floor1_Y_final[high_neigh_offs] - floor1_Y_final[low_neigh_offs]; // render_point begin
1305 216559 adx = vf->list[high_neigh_offs].x - vf->list[low_neigh_offs].x;
1306 216559 ady = FFABS(dy);
1307 216559 err = ady * (vf->list[i].x - vf->list[low_neigh_offs].x);
1308 216559 off = err / adx;
1309
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 216559 if (dy < 0) {
1310 119589 predicted = floor1_Y_final[low_neigh_offs] - off;
1311 } else {
1312 96970 predicted = floor1_Y_final[low_neigh_offs] + off;
1313 } // render_point end
1314
1315 216559 val = floor1_Y[i];
1316 216559 highroom = range-predicted;
1317 216559 lowroom = predicted;
1318
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 216559 if (highroom < lowroom) {
1319 88013 room = highroom * 2;
1320 } else {
1321 128546 room = lowroom * 2; // SPEC misspelling
1322 }
1323
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 216559 if (val) {
1324 98070 floor1_flag[low_neigh_offs] = 1;
1325 98070 floor1_flag[high_neigh_offs] = 1;
1326 98070 floor1_flag[i] = 1;
1327
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 98070 if (val >= room) {
1328
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✓ Branch 1 taken 35 times.
 115 if (highroom > lowroom) {
1329 80 floor1_Y_final[i] = av_clip_uint16(val - lowroom + predicted);
1330 } else {
1331 35 floor1_Y_final[i] = av_clip_uint16(predicted - val + highroom - 1);
1332 }
1333 } else {
1334
2/2
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✓ Branch 1 taken 34378 times.
 97955 if (val & 1) {
1335 63577 floor1_Y_final[i] = av_clip_uint16(predicted - (val + 1) / 2);
1336 } else {
1337 34378 floor1_Y_final[i] = av_clip_uint16(predicted + val / 2);
1338 }
1339 }
1340 } else {
1341 118489 floor1_flag[i] = 0;
1342 118489 floor1_Y_final[i] = av_clip_uint16(predicted);
1343 }
1344
1345 ff_dlog(NULL, " Decoded floor(%d) = %u / val %u\n",
1346 vf->list[i].x, floor1_Y_final[i], val);
1347 }
1348
1349 // Curve synth - connect the calculated dots and convert from dB scale FIXME optimize ?
1350
1351 9469 ff_vorbis_floor1_render_list(vf->list, vf->x_list_dim, floor1_Y_final, floor1_flag, vf->multiplier, vec, vf->list[1].x);
1352
1353 ff_dlog(NULL, " Floor decoded\n");
1354
1355 9469 return 0;
1356 }
1357
1358 134631 static av_always_inline int setup_classifs(vorbis_context *vc,
1359 vorbis_residue *vr,
1360 uint8_t *do_not_decode,
1361 unsigned ch_used,
1362 int partition_count,
1363 int ptns_to_read
1364 )
1365 {
1366 134631 vorbis_codebook *codebook = vc->codebooks + vr->classbook;
1367 int p, j, i;
1368 134631 unsigned c_p_c = codebook->dimensions;
1369 134631 unsigned inverse_class = ff_inverse[vr->classifications];
1370 int temp, temp2;
1371
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 298515 for (p = 0, j = 0; j < ch_used; ++j) {
1372
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✓ Branch 1 taken 1321 times.
 163884 if (!do_not_decode[j]) {
1373 162563 temp = get_vlc2(&vc->gb, codebook->vlc.table,
1374 162563 codebook->nb_bits, 3);
1375
1376 ff_dlog(NULL, "Classword: %u\n", temp);
1377
1378
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 162563 av_assert0(temp < 65536);
1379
1380
1/2
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 162563 if (temp < 0) {
1381 ✗ av_log(vc->avctx, AV_LOG_ERROR,
1382 "Invalid vlc code decoding %d channel.", j);
1383 ✗ return AVERROR_INVALIDDATA;
1384 }
1385
1386
1/2
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✓ Branch 1 taken 162563 times.
 162563 if (vr->classifications == 1) {
1387 ✗ for (i = partition_count + c_p_c - 1; i >= partition_count; i--) {
1388 ✗ if (i < ptns_to_read)
1389 ✗ vr->classifs[p + i] = 0;
1390 }
1391 } else {
1392
2/2
✓ Branch 0 taken 344243 times.
✓ Branch 1 taken 162563 times.
 506806 for (i = partition_count + c_p_c - 1; i >= partition_count; i--) {
1393 344243 temp2 = (((uint64_t)temp) * inverse_class) >> 32;
1394
1395
2/2
✓ Branch 0 taken 344020 times.
✓ Branch 1 taken 223 times.
 344243 if (i < ptns_to_read)
1396 344020 vr->classifs[p + i] = temp - temp2 * vr->classifications;
1397 344243 temp = temp2;
1398 }
1399 }
1400 }
1401 163884 p += ptns_to_read;
1402 }
1403 134631 return 0;
1404 }
1405 // Read and decode residue
1406
1407 9502 static av_always_inline int vorbis_residue_decode_internal(vorbis_context *vc,
1408 vorbis_residue *vr,
1409 unsigned ch,
1410 uint8_t *do_not_decode,
1411 float *vec,
1412 unsigned vlen,
1413 unsigned ch_left,
1414 int vr_type)
1415 {
1416 9502 GetBitContext *gb = &vc->gb;
1417 9502 unsigned c_p_c = vc->codebooks[vr->classbook].dimensions;
1418 9502 uint8_t *classifs = vr->classifs;
1419 unsigned pass, ch_used, i, j, k, l;
1420 9502 unsigned max_output = (ch - 1) * vlen;
1421 9502 int ptns_to_read = vr->ptns_to_read;
1422 9502 int libvorbis_bug = 0;
1423
1424
2/2
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✓ Branch 1 taken 5227 times.
 9502 if (vr_type == 2) {
1425
2/2
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✓ Branch 1 taken 4275 times.
 9663 for (j = 1; j < ch; ++j)
1426 5388 do_not_decode[0] &= do_not_decode[j]; // FIXME - clobbering input
1427
2/2
✓ Branch 0 taken 120 times.
✓ Branch 1 taken 4155 times.
 4275 if (do_not_decode[0])
1428 120 return 0;
1429 4155 ch_used = 1;
1430 4155 max_output += vr->end / ch;
1431 } else {
1432 5227 ch_used = ch;
1433 5227 max_output += vr->end;
1434 }
1435
1436
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✓ Branch 1 taken 9382 times.
 9382 if (max_output > ch_left * vlen) {
1437 ✗ if (max_output <= ch_left * vlen + vr->partition_size*ch_used/ch) {
1438 ✗ ptns_to_read--;
1439 ✗ libvorbis_bug = 1;
1440 } else {
1441 ✗ av_log(vc->avctx, AV_LOG_ERROR, "Insufficient output buffer\n");
1442 ✗ return AVERROR_INVALIDDATA;
1443 }
1444 }
1445
1446 ff_dlog(NULL, " residue type 0/1/2 decode begin, ch: %d cpc %d \n", ch, c_p_c);
1447
1448
2/2
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✓ Branch 1 taken 9382 times.
 31007 for (pass = 0; pass <= vr->maxpass; ++pass) { // FIXME OPTIMIZE?
1449 int voffset, partition_count, j_times_ptns_to_read;
1450
1451 21625 voffset = vr->begin;
1452
2/2
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 371507 for (partition_count = 0; partition_count < ptns_to_read;) { // SPEC error
1453
2/2
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✓ Branch 1 taken 215251 times.
 349882 if (!pass) {
1454 134631 int ret = setup_classifs(vc, vr, do_not_decode, ch_used, partition_count, ptns_to_read);
1455
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✓ Branch 1 taken 134631 times.
 134631 if (ret < 0)
1456 ✗ return ret;
1457 }
1458
4/4
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✓ Branch 2 taken 735320 times.
✓ Branch 3 taken 669 times.
 1085202 for (i = 0; (i < c_p_c) && (partition_count < ptns_to_read); ++i) {
1459
2/2
✓ Branch 0 taken 797858 times.
✓ Branch 1 taken 735320 times.
 1533178 for (j_times_ptns_to_read = 0, j = 0; j < ch_used; ++j) {
1460 unsigned voffs;
1461
1462
2/2
✓ Branch 0 taken 793842 times.
✓ Branch 1 taken 4016 times.
 797858 if (!do_not_decode[j]) {
1463 793842 unsigned vqclass = classifs[j_times_ptns_to_read + partition_count];
1464 793842 int vqbook = vr->books[vqclass][pass];
1465
1466
3/4
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✓ Branch 1 taken 472071 times.
✓ Branch 2 taken 321771 times.
✗ Branch 3 not taken.
 793842 if (vqbook >= 0 && vc->codebooks[vqbook].codevectors) {
1467 int coffs;
1468 321771 unsigned dim = vc->codebooks[vqbook].dimensions;
1469 321771 unsigned step = FASTDIV(vr->partition_size << 1, dim << 1);
1470 321771 vorbis_codebook codebook = vc->codebooks[vqbook];
1471
1472
1/2
✗ Branch 1 not taken.
✓ Branch 2 taken 321771 times.
 321771 if (get_bits_left(gb) < 0) {
1473 ✗ av_log(vc->avctx, AV_LOG_ERROR, "Overread %d bits\n", -get_bits_left(gb));
1474 ✗ return 0;
1475 }
1476
1477
2/2
✓ Branch 0 taken 115082 times.
✓ Branch 1 taken 206689 times.
 321771 if (vr_type == 0) {
1478
1479 115082 voffs = voffset+j*vlen;
1480
2/2
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✓ Branch 1 taken 115082 times.
 1357906 for (k = 0; k < step; ++k) {
1481 1242824 coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3);
1482
1/2
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✓ Branch 1 taken 1242824 times.
 1242824 if (coffs < 0)
1483 ✗ return coffs;
1484 1242824 coffs *= dim;
1485
2/2
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✓ Branch 1 taken 1242824 times.
 4778728 for (l = 0; l < dim; ++l)
1486 3535904 vec[voffs + k + l * step] += codebook.codevectors[coffs + l];
1487 }
1488
2/2
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✓ Branch 1 taken 178959 times.
 206689 } else if (vr_type == 1) {
1489 27730 voffs = voffset + j * vlen;
1490
2/2
✓ Branch 0 taken 286674 times.
✓ Branch 1 taken 27730 times.
 314404 for (k = 0; k < step; ++k) {
1491 286674 coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3);
1492
1/2
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✓ Branch 1 taken 286674 times.
 286674 if (coffs < 0)
1493 ✗ return coffs;
1494 286674 coffs *= dim;
1495
2/2
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✓ Branch 1 taken 286674 times.
 1076790 for (l = 0; l < dim; ++l, ++voffs) {
1496 790116 vec[voffs]+=codebook.codevectors[coffs+l];
1497
1498 ff_dlog(NULL, " pass %d offs: %d curr: %f change: %f cv offs.: %d \n",
1499 pass, voffs, vec[voffs], codebook.codevectors[coffs+l], coffs);
1500 }
1501 }
1502
5/8
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✗ Branch 7 not taken.
 178959 } else if (vr_type == 2 && ch == 2 && (voffset & 1) == 0 && (dim & 1) == 0) { // most frequent case optimized
1503 151234 voffs = voffset >> 1;
1504
1505
2/2
✓ Branch 0 taken 64528 times.
✓ Branch 1 taken 86706 times.
 151234 if (dim == 2) {
1506
2/2
✓ Branch 0 taken 1004556 times.
✓ Branch 1 taken 64528 times.
 1069084 for (k = 0; k < step; ++k) {
1507 1004556 coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3);
1508
1/2
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✓ Branch 1 taken 1004556 times.
 1004556 if (coffs < 0)
1509 ✗ return coffs;
1510 1004556 coffs *= 2;
1511 1004556 vec[voffs + k ] += codebook.codevectors[coffs ];
1512 1004556 vec[voffs + k + vlen] += codebook.codevectors[coffs + 1];
1513 }
1514
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✓ Branch 1 taken 23632 times.
 86706 } else if (dim == 4) {
1515
2/2
✓ Branch 0 taken 447102 times.
✓ Branch 1 taken 63074 times.
 510176 for (k = 0; k < step; ++k, voffs += 2) {
1516 447102 coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3);
1517
1/2
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✓ Branch 1 taken 447102 times.
 447102 if (coffs < 0)
1518 ✗ return coffs;
1519 447102 coffs *= 4;
1520 447102 vec[voffs ] += codebook.codevectors[coffs ];
1521 447102 vec[voffs + 1 ] += codebook.codevectors[coffs + 2];
1522 447102 vec[voffs + vlen ] += codebook.codevectors[coffs + 1];
1523 447102 vec[voffs + vlen + 1] += codebook.codevectors[coffs + 3];
1524 }
1525 } else
1526
2/2
✓ Branch 0 taken 94166 times.
✓ Branch 1 taken 23632 times.
 117798 for (k = 0; k < step; ++k) {
1527 94166 coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3);
1528
1/2
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✓ Branch 1 taken 94166 times.
 94166 if (coffs < 0)
1529 ✗ return coffs;
1530 94166 coffs *= dim;
1531
2/2
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✓ Branch 1 taken 94166 times.
 470830 for (l = 0; l < dim; l += 2, voffs++) {
1532 376664 vec[voffs ] += codebook.codevectors[coffs + l ];
1533 376664 vec[voffs + vlen] += codebook.codevectors[coffs + l + 1];
1534
1535 ff_dlog(NULL, " pass %d offs: %d curr: %f change: %f cv offs.: %d+%d \n",
1536 pass, voffset / ch + (voffs % ch) * vlen,
1537 vec[voffset / ch + (voffs % ch) * vlen],
1538 codebook.codevectors[coffs + l], coffs, l);
1539 }
1540 }
1541
1542
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✗ Branch 1 not taken.
 27725 } else if (vr_type == 2) {
1543
1/2
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✗ Branch 1 not taken.
 27725 unsigned voffs_div = ch == 1 ? voffset : FASTDIV(voffset, ch);
1544 27725 unsigned voffs_mod = voffset - voffs_div * ch;
1545
1546
2/2
✓ Branch 0 taken 164109 times.
✓ Branch 1 taken 27725 times.
 191834 for (k = 0; k < step; ++k) {
1547 164109 coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3);
1548
1/2
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✓ Branch 1 taken 164109 times.
 164109 if (coffs < 0)
1549 ✗ return coffs;
1550 164109 coffs *= dim;
1551
2/2
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✓ Branch 1 taken 164109 times.
 912594 for (l = 0; l < dim; ++l) {
1552 748485 vec[voffs_div + voffs_mod * vlen] +=
1553 748485 codebook.codevectors[coffs + l];
1554
1555 ff_dlog(NULL, " pass %d offs: %d curr: %f change: %f cv offs.: %d+%d \n",
1556 pass, voffs_div + voffs_mod * vlen,
1557 vec[voffs_div + voffs_mod * vlen],
1558 codebook.codevectors[coffs + l], coffs, l);
1559
1560
2/2
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✓ Branch 1 taken 598788 times.
 748485 if (++voffs_mod == ch) {
1561 149697 voffs_div++;
1562 149697 voffs_mod = 0;
1563 }
1564 }
1565 }
1566 }
1567 }
1568 }
1569 797858 j_times_ptns_to_read += ptns_to_read;
1570 }
1571 735320 ++partition_count;
1572 735320 voffset += vr->partition_size;
1573 }
1574 }
1575
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✗ Branch 3 not taken.
 21625 if (libvorbis_bug && !pass) {
1576 ✗ for (j = 0; j < ch_used; ++j) {
1577 ✗ if (!do_not_decode[j]) {
1578 ✗ get_vlc2(&vc->gb, vc->codebooks[vr->classbook].vlc.table,
1579 ✗ vc->codebooks[vr->classbook].nb_bits, 3);
1580 }
1581 }
1582 }
1583 }
1584 9382 return 0;
1585 }
1586
1587 9502 static inline int vorbis_residue_decode(vorbis_context *vc, vorbis_residue *vr,
1588 unsigned ch,
1589 uint8_t *do_not_decode,
1590 float *vec, unsigned vlen,
1591 unsigned ch_left)
1592 {
1593
2/2
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✓ Branch 1 taken 5227 times.
 9502 if (vr->type == 2)
1594 4275 return vorbis_residue_decode_internal(vc, vr, ch, do_not_decode, vec, vlen, ch_left, 2);
1595
2/2
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✓ Branch 1 taken 3420 times.
 5227 else if (vr->type == 1)
1596 1807 return vorbis_residue_decode_internal(vc, vr, ch, do_not_decode, vec, vlen, ch_left, 1);
1597
1/2
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✗ Branch 1 not taken.
 3420 else if (vr->type == 0)
1598 3420 return vorbis_residue_decode_internal(vc, vr, ch, do_not_decode, vec, vlen, ch_left, 0);
1599 else {
1600 ✗ av_log(vc->avctx, AV_LOG_ERROR, " Invalid residue type while residue decode?! \n");
1601 ✗ return AVERROR_INVALIDDATA;
1602 }
1603 }
1604
1605 // Decode the audio packet using the functions above
1606
1607 9131 static int vorbis_parse_audio_packet(vorbis_context *vc, float **floor_ptr)
1608 {
1609 9131 GetBitContext *gb = &vc->gb;
1610 AVTXContext *mdct;
1611 av_tx_fn mdct_fn;
1612 9131 int previous_window = vc->previous_window;
1613 unsigned mode_number, blockflag, blocksize;
1614 int i, j;
1615 uint8_t no_residue[255];
1616 uint8_t do_not_decode[255];
1617 vorbis_mapping *mapping;
1618 9131 float *ch_res_ptr = vc->channel_residues;
1619 uint8_t res_chan[255];
1620 9131 unsigned res_num = 0;
1621 9131 int retlen = 0;
1622 9131 unsigned ch_left = vc->audio_channels;
1623 unsigned vlen;
1624
1625
1/2
✗ Branch 1 not taken.
✓ Branch 2 taken 9131 times.
 9131 if (get_bits1(gb)) {
1626 ✗ av_log(vc->avctx, AV_LOG_ERROR, "Not a Vorbis I audio packet.\n");
1627 ✗ return AVERROR_INVALIDDATA; // packet type not audio
1628 }
1629
1630
1/2
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 9131 if (vc->mode_count == 1) {
1631 ✗ mode_number = 0;
1632 } else {
1633
1/2
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✓ Branch 2 taken 9131 times.
 9131 GET_VALIDATED_INDEX(mode_number, ilog(vc->mode_count-1), vc->mode_count)
1634 }
1635 9131 vc->mode_number = mode_number;
1636 9131 mapping = &vc->mappings[vc->modes[mode_number].mapping];
1637
1638 ff_dlog(NULL, " Mode number: %u , mapping: %d , blocktype %d\n", mode_number,
1639 vc->modes[mode_number].mapping, vc->modes[mode_number].blockflag);
1640
1641 9131 blockflag = vc->modes[mode_number].blockflag;
1642 9131 blocksize = vc->blocksize[blockflag];
1643 9131 vlen = blocksize / 2;
1644
2/2
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✓ Branch 1 taken 3152 times.
 9131 if (blockflag) {
1645 5979 int code = get_bits(gb, 2);
1646
2/2
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✓ Branch 1 taken 5976 times.
 5979 if (previous_window < 0)
1647 3 previous_window = code>>1;
1648
2/2
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✓ Branch 1 taken 3096 times.
 3152 } else if (previous_window < 0)
1649 56 previous_window = 0;
1650
1651 9131 memset(ch_res_ptr, 0, sizeof(float) * vc->audio_channels * vlen); //FIXME can this be removed ?
1652
2/2
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✓ Branch 1 taken 9131 times.
 26976 for (i = 0; i < vc->audio_channels; ++i)
1653 17845 memset(floor_ptr[i], 0, vlen * sizeof(floor_ptr[0][0])); //FIXME can this be removed ?
1654
1655 // Decode floor
1656
1657
2/2
✓ Branch 0 taken 17845 times.
✓ Branch 1 taken 9131 times.
 26976 for (i = 0; i < vc->audio_channels; ++i) {
1658 vorbis_floor *floor;
1659 int ret;
1660
2/2
✓ Branch 0 taken 2226 times.
✓ Branch 1 taken 15619 times.
 17845 if (mapping->submaps > 1) {
1661 2226 floor = &vc->floors[mapping->submap_floor[mapping->mux[i]]];
1662 } else {
1663 15619 floor = &vc->floors[mapping->submap_floor[0]];
1664 }
1665
1666 17845 ret = floor->decode(vc, &floor->data, floor_ptr[i]);
1667
1668
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 17845 times.
 17845 if (ret < 0) {
1669 ✗ av_log(vc->avctx, AV_LOG_ERROR, "Invalid codebook in vorbis_floor_decode.\n");
1670 ✗ return AVERROR_INVALIDDATA;
1671 }
1672 17845 no_residue[i] = ret;
1673 }
1674
1675 // Nonzero vector propagate
1676
1677
2/2
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✓ Branch 1 taken 9131 times.
 14519 for (i = mapping->coupling_steps - 1; i >= 0; --i) {
1678
2/2
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✓ Branch 1 taken 656 times.
 5388 if (!(no_residue[mapping->magnitude[i]] & no_residue[mapping->angle[i]])) {
1679 4732 no_residue[mapping->magnitude[i]] = 0;
1680 4732 no_residue[mapping->angle[i]] = 0;
1681 }
1682 }
1683
1684 // Decode residue
1685
1686
2/2
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✓ Branch 1 taken 9131 times.
 18633 for (i = 0; i < mapping->submaps; ++i) {
1687 vorbis_residue *residue;
1688 9502 unsigned ch = 0;
1689 int ret;
1690
1691
2/2
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✓ Branch 1 taken 9502 times.
 29573 for (j = 0; j < vc->audio_channels; ++j) {
1692
4/4
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✓ Branch 2 taken 2226 times.
✓ Branch 3 taken 2226 times.
 20071 if ((mapping->submaps == 1) || (i == mapping->mux[j])) {
1693 17845 res_chan[j] = res_num;
1694
2/2
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✓ Branch 1 taken 16619 times.
 17845 if (no_residue[j]) {
1695 1226 do_not_decode[ch] = 1;
1696 } else {
1697 16619 do_not_decode[ch] = 0;
1698 }
1699 17845 ++ch;
1700 17845 ++res_num;
1701 }
1702 }
1703 9502 residue = &vc->residues[mapping->submap_residue[i]];
1704
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 9502 if (ch_left < ch) {
1705 ✗ av_log(vc->avctx, AV_LOG_ERROR, "Too many channels in vorbis_floor_decode.\n");
1706 ✗ return AVERROR_INVALIDDATA;
1707 }
1708
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✗ Branch 1 not taken.
 9502 if (ch) {
1709 9502 ret = vorbis_residue_decode(vc, residue, ch, do_not_decode, ch_res_ptr, vlen, ch_left);
1710
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✓ Branch 1 taken 9502 times.
 9502 if (ret < 0)
1711 ✗ return ret;
1712 }
1713
1714 9502 ch_res_ptr += ch * vlen;
1715 9502 ch_left -= ch;
1716 }
1717
1718
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 9131 if (ch_left > 0)
1719 ✗ return AVERROR_INVALIDDATA;
1720
1721 // Inverse coupling
1722
1723
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 14519 for (i = mapping->coupling_steps - 1; i >= 0; --i) { //warning: i has to be signed
1724 float *mag, *ang;
1725
1726 5388 mag = vc->channel_residues+res_chan[mapping->magnitude[i]] * blocksize / 2;
1727 5388 ang = vc->channel_residues+res_chan[mapping->angle[i]] * blocksize / 2;
1728 5388 vc->dsp.vorbis_inverse_coupling(mag, ang, blocksize / 2);
1729 }
1730
1731 // Dotproduct, MDCT
1732
1733 9131 mdct = vc->mdct[blockflag];
1734 9131 mdct_fn = vc->mdct_fn[blockflag];
1735
1736
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 26976 for (j = vc->audio_channels-1;j >= 0; j--) {
1737 17845 ch_res_ptr = vc->channel_residues + res_chan[j] * blocksize / 2;
1738 17845 vc->fdsp->vector_fmul(floor_ptr[j], floor_ptr[j], ch_res_ptr, blocksize / 2);
1739 17845 mdct_fn(mdct, ch_res_ptr, floor_ptr[j], sizeof(float));
1740 }
1741
1742 // Overlap/add, save data for next overlapping
1743
1744 9131 retlen = (blocksize + vc->blocksize[previous_window]) / 4;
1745
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 26976 for (j = 0; j < vc->audio_channels; j++) {
1746 17845 unsigned bs0 = vc->blocksize[0];
1747 17845 unsigned bs1 = vc->blocksize[1];
1748 17845 float *residue = vc->channel_residues + res_chan[j] * blocksize / 2;
1749 17845 float *saved = vc->saved + j * bs1 / 4;
1750 17845 float *ret = floor_ptr[j];
1751 17845 float *buf = residue;
1752 17845 const float *win = vc->win[blockflag & previous_window];
1753
1754
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 17845 if (blockflag == previous_window) {
1755 16412 vc->fdsp->vector_fmul_window(ret, saved, buf, win, blocksize / 4);
1756
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 1433 } else if (blockflag > previous_window) {
1757 737 vc->fdsp->vector_fmul_window(ret, saved, buf, win, bs0 / 4);
1758 737 memcpy(ret+bs0/2, buf+bs0/4, ((bs1-bs0)/4) * sizeof(float));
1759 } else {
1760 696 memcpy(ret, saved, ((bs1 - bs0) / 4) * sizeof(float));
1761 696 vc->fdsp->vector_fmul_window(ret + (bs1 - bs0) / 4, saved + (bs1 - bs0) / 4, buf, win, bs0 / 4);
1762 }
1763 17845 memcpy(saved, buf + blocksize / 4, blocksize / 4 * sizeof(float));
1764 }
1765
1766 9131 vc->previous_window = blockflag;
1767 9131 return retlen;
1768 }
1769
1770 // Return the decoded audio packet through the standard api
1771
1772 9134 static int vorbis_decode_frame(AVCodecContext *avctx, AVFrame *frame,
1773 int *got_frame_ptr, AVPacket *avpkt)
1774 {
1775 9134 const uint8_t *buf = avpkt->data;
1776 9134 int buf_size = avpkt->size;
1777 9134 vorbis_context *vc = avctx->priv_data;
1778 9134 GetBitContext *gb = &vc->gb;
1779 float *channel_ptrs[255];
1780 int i, len, ret;
1781
1782 ff_dlog(NULL, "packet length %d \n", buf_size);
1783
1784
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 9134 if (*buf == 1 && buf_size > 7) {
1785
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 1 if ((ret = init_get_bits8(gb, buf + 1, buf_size - 1)) < 0)
1786 ✗ return ret;
1787
1788 1 vorbis_free(vc);
1789
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 1 if ((ret = vorbis_parse_id_hdr(vc))) {
1790 ✗ av_log(avctx, AV_LOG_ERROR, "Id header corrupt.\n");
1791 ✗ vorbis_free(vc);
1792 ✗ return ret;
1793 }
1794
1795 1 av_channel_layout_uninit(&avctx->ch_layout);
1796
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 1 if (vc->audio_channels > 8) {
1797 ✗ avctx->ch_layout.order = AV_CHANNEL_ORDER_UNSPEC;
1798 ✗ avctx->ch_layout.nb_channels = vc->audio_channels;
1799 } else {
1800 1 av_channel_layout_copy(&avctx->ch_layout, &ff_vorbis_ch_layouts[vc->audio_channels - 1]);
1801 }
1802
1803 1 avctx->sample_rate = vc->audio_samplerate;
1804 1 return buf_size;
1805 }
1806
1807
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 9133 if (*buf == 3 && buf_size > 7) {
1808 1 av_log(avctx, AV_LOG_DEBUG, "Ignoring comment header\n");
1809 1 return buf_size;
1810 }
1811
1812
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 9132 if (*buf == 5 && buf_size > 7 && vc->channel_residues && !vc->modes) {
1813
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 1 if ((ret = init_get_bits8(gb, buf + 1, buf_size - 1)) < 0)
1814 ✗ return ret;
1815
1816
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 1 if ((ret = vorbis_parse_setup_hdr(vc))) {
1817 ✗ av_log(avctx, AV_LOG_ERROR, "Setup header corrupt.\n");
1818 ✗ vorbis_free(vc);
1819 ✗ return ret;
1820 }
1821 1 return buf_size;
1822 }
1823
1824
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 9131 if (!vc->channel_residues || !vc->modes) {
1825 ✗ av_log(avctx, AV_LOG_ERROR, "Data packet before valid headers\n");
1826 ✗ return AVERROR_INVALIDDATA;
1827 }
1828
1829 /* get output buffer */
1830 9131 frame->nb_samples = vc->blocksize[1] / 2;
1831
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 9131 if ((ret = ff_get_buffer(avctx, frame, 0)) < 0)
1832 ✗ return ret;
1833
1834
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 9131 if (vc->audio_channels > 8) {
1835 ✗ for (i = 0; i < vc->audio_channels; i++)
1836 ✗ channel_ptrs[i] = (float *)frame->extended_data[i];
1837 } else {
1838
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 26976 for (i = 0; i < vc->audio_channels; i++) {
1839 17845 int ch = ff_vorbis_channel_layout_offsets[vc->audio_channels - 1][i];
1840 17845 channel_ptrs[ch] = (float *)frame->extended_data[i];
1841 }
1842 }
1843
1844
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 9131 if ((ret = init_get_bits8(gb, buf, buf_size)) < 0)
1845 ✗ return ret;
1846
1847
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 9131 if ((len = vorbis_parse_audio_packet(vc, channel_ptrs)) <= 0)
1848 ✗ return len;
1849
1850
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 9131 if (!vc->first_frame) {
1851 58 vc->first_frame = 1;
1852 58 avctx->internal->skip_samples = len;
1853 }
1854
1855 ff_dlog(NULL, "parsed %d bytes %d bits, returned %d samples (*ch*bits) \n",
1856 get_bits_count(gb) / 8, get_bits_count(gb) % 8, len);
1857
1858 9131 frame->nb_samples = len;
1859 9131 *got_frame_ptr = 1;
1860
1861 9131 return buf_size;
1862 }
1863
1864 // Close decoder
1865
1866 68 static av_cold int vorbis_decode_close(AVCodecContext *avctx)
1867 {
1868 68 vorbis_context *vc = avctx->priv_data;
1869
1870 68 vorbis_free(vc);
1871
1872 68 return 0;
1873 }
1874
1875 ✗ static av_cold void vorbis_decode_flush(AVCodecContext *avctx)
1876 {
1877 ✗ vorbis_context *vc = avctx->priv_data;
1878
1879 ✗ if (vc->saved) {
1880 ✗ memset(vc->saved, 0, (vc->blocksize[1] / 4) * vc->audio_channels *
1881 sizeof(*vc->saved));
1882 }
1883 ✗ vc->previous_window = -1;
1884 ✗ vc->first_frame = 0;
1885 ✗ }
1886
1887 const FFCodec ff_vorbis_decoder = {
1888 .p.name = "vorbis",
1889 CODEC_LONG_NAME("Vorbis"),
1890 .p.type = AVMEDIA_TYPE_AUDIO,
1891 .p.id = AV_CODEC_ID_VORBIS,
1892 .priv_data_size = sizeof(vorbis_context),
1893 .init = vorbis_decode_init,
1894 .close = vorbis_decode_close,
1895 FF_CODEC_DECODE_CB(vorbis_decode_frame),
1896 .flush = vorbis_decode_flush,
1897 .p.capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_CHANNEL_CONF,
1898 .caps_internal = FF_CODEC_CAP_INIT_CLEANUP,
1899 CODEC_CH_LAYOUTS_ARRAY(ff_vorbis_ch_layouts),
1900 CODEC_SAMPLEFMTS(AV_SAMPLE_FMT_FLTP),
1901 };
1902