FFmpeg coverage

Directory: ../../../ffmpeg/
File: src/libavcodec/vorbisdec.c
Date: 2026-04-24 19:58:39
Exec Total Coverage
Lines: 713 916 77.8%
Functions: 20 21 95.2%
Branches: 404 588 68.7%
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 1900 static float vorbisfloat2float(unsigned val)
183 {
184 1900 float mant = val & 0x1fffff;
185 1900 int exp = (val & 0x7fe00000) >> 21;
186
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 1900 if (val & 0x80000000)
187 882 mant = -mant;
188 1900 return ldexpf(mant, exp - 20 - 768);
189 }
190
191
192 // Free all allocated memory -----------------------------------------
193
194 71 static void vorbis_free(vorbis_context *vc)
195 {
196 int i;
197
198 71 av_freep(&vc->channel_residues);
199 71 av_freep(&vc->saved);
200 71 av_freep(&vc->fdsp);
201
202
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 71 if (vc->residues)
203
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 213 for (i = 0; i < vc->residue_count; i++)
204 142 av_freep(&vc->residues[i].classifs);
205 71 av_freep(&vc->residues);
206 71 av_freep(&vc->modes);
207
208 71 av_tx_uninit(&vc->mdct[0]);
209 71 av_tx_uninit(&vc->mdct[1]);
210
211
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 71 if (vc->codebooks)
212
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 2292 for (i = 0; i < vc->codebook_count; ++i) {
213 2221 av_freep(&vc->codebooks[i].codevectors);
214 2221 ff_vlc_free(&vc->codebooks[i].vlc);
215 }
216 71 av_freep(&vc->codebooks);
217
218
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 71 if (vc->floors)
219
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 213 for (i = 0; i < vc->floor_count; ++i) {
220
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 142 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 98 av_freep(&vc->floors[i].data.t1.list);
227 }
228 }
229 71 av_freep(&vc->floors);
230
231
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 71 if (vc->mappings)
232
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 211 for (i = 0; i < vc->mapping_count; ++i) {
233 140 av_freep(&vc->mappings[i].magnitude);
234 140 av_freep(&vc->mappings[i].angle);
235 140 av_freep(&vc->mappings[i].mux);
236 }
237 71 av_freep(&vc->mappings);
238 71 }
239
240 // Parse setup header -------------------------------------------------
241
242 // Process codebooks part
243
244 71 static int vorbis_parse_setup_hdr_codebooks(vorbis_context *vc)
245 {
246 unsigned cb;
247 71 uint8_t *tmp_vlc_bits = NULL;
248 71 uint32_t *tmp_vlc_codes = NULL;
249 71 GetBitContext *gb = &vc->gb;
250 71 uint16_t *codebook_multiplicands = NULL;
251 71 int ret = 0;
252
253 71 vc->codebook_count = get_bits(gb, 8) + 1;
254
255 ff_dlog(NULL, " Codebooks: %d \n", vc->codebook_count);
256
257 71 vc->codebooks = av_mallocz(vc->codebook_count * sizeof(*vc->codebooks));
258 71 tmp_vlc_bits = av_mallocz(V_MAX_VLCS * sizeof(*tmp_vlc_bits));
259 71 tmp_vlc_codes = av_mallocz(V_MAX_VLCS * sizeof(*tmp_vlc_codes));
260 71 codebook_multiplicands = av_malloc(V_MAX_VLCS * sizeof(*codebook_multiplicands));
261
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 71 if (!vc->codebooks ||
262
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 71 !tmp_vlc_bits || !tmp_vlc_codes || !codebook_multiplicands) {
263 ✗ ret = AVERROR(ENOMEM);
264 ✗ goto error;
265 }
266
267
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 2292 for (cb = 0; cb < vc->codebook_count; ++cb) {
268 2221 vorbis_codebook *codebook_setup = &vc->codebooks[cb];
269 2221 unsigned ordered, t, entries, used_entries = 0;
270
271 ff_dlog(NULL, " %u. Codebook\n", cb);
272
273
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 2221 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 2221 codebook_setup->dimensions=get_bits(gb, 16);
281
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 2221 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 2221 entries = get_bits(gb, 24);
289
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 2221 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 2221 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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 2221 if (!ordered) {
303 unsigned ce, flag;
304 2197 unsigned sparse = get_bits1(gb);
305
306 ff_dlog(NULL, " not ordered \n");
307
308
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 2197 if (sparse) {
309 ff_dlog(NULL, " sparse \n");
310
311 906 used_entries = 0;
312
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 296632 for (ce = 0; ce < entries; ++ce) {
313 295726 flag = get_bits1(gb);
314
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 295726 if (flag) {
315 109136 tmp_vlc_bits[ce] = get_bits(gb, 5) + 1;
316 109136 ++used_entries;
317 } else
318 186590 tmp_vlc_bits[ce] = 0;
319 }
320 } else {
321 ff_dlog(NULL, " not sparse \n");
322
323 1291 used_entries = entries;
324
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 313165 for (ce = 0; ce < entries; ++ce)
325 311874 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 2221 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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 2221 if (codebook_setup->lookup_type == 1) {
364 unsigned i, j, k;
365 950 unsigned codebook_lookup_values = ff_vorbis_nth_root(entries, codebook_setup->dimensions);
366
367 950 float codebook_minimum_value = vorbisfloat2float(get_bits_long(gb, 32));
368 950 float codebook_delta_value = vorbisfloat2float(get_bits_long(gb, 32));
369 950 unsigned codebook_value_bits = get_bits(gb, 4) + 1;
370 950 unsigned codebook_sequence_p = get_bits1(gb);
371
372
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 950 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 minimum %f \n",
379 codebook_delta_value, codebook_minimum_value);
380
381
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 18602 for (i = 0; i < codebook_lookup_values; ++i) {
382 17652 codebook_multiplicands[i] = get_bits(gb, codebook_value_bits);
383
384 ff_dlog(NULL, " multiplicands*delta+minimum : %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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 950 if (used_entries) {
391 950 codebook_setup->codevectors =
392 950 av_calloc(used_entries, codebook_setup->dimensions *
393 sizeof(*codebook_setup->codevectors));
394
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 950 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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 504858 for (j = 0, i = 0; i < entries; ++i) {
402 503908 unsigned dim = codebook_setup->dimensions;
403
404
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 503908 if (tmp_vlc_bits[i]) {
405 331000 float last = 0.0;
406 331000 unsigned lookup_offset = i;
407
408 ff_dlog(vc->avctx, "Lookup offset %u ,", i);
409
410
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 1330503 for (k = 0; k < dim; ++k) {
411 999503 unsigned multiplicand_offset = lookup_offset % codebook_lookup_values;
412 999503 codebook_setup->codevectors[j * dim + k] = codebook_multiplicands[multiplicand_offset] * codebook_delta_value + codebook_minimum_value + last;
413
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 999503 if (codebook_sequence_p)
414 257530 last = codebook_setup->codevectors[j * dim + k];
415 999503 lookup_offset/=codebook_lookup_values;
416 }
417 331000 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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 1330503 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 331000 ++j;
426 }
427 }
428
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 950 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 }
433 950 entries = used_entries;
434
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 1271 } 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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 2221 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 2221 codebook_setup->maxdepth = 0;
447
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 437815 for (t = 0; t < entries; ++t)
448
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 435594 if (tmp_vlc_bits[t] >= codebook_setup->maxdepth)
449 120222 codebook_setup->maxdepth = tmp_vlc_bits[t];
450
451
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 2221 if (codebook_setup->maxdepth > 3 * V_NB_BITS)
452 ✗ codebook_setup->nb_bits = V_NB_BITS2;
453 else
454 2221 codebook_setup->nb_bits = V_NB_BITS;
455
456 2221 codebook_setup->maxdepth = (codebook_setup->maxdepth+codebook_setup->nb_bits - 1) / codebook_setup->nb_bits;
457
458
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 2221 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 71 av_free(tmp_vlc_bits);
469 71 av_free(tmp_vlc_codes);
470 71 av_free(codebook_multiplicands);
471 71 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 71 static int vorbis_parse_setup_hdr_tdtransforms(vorbis_context *vc)
484 {
485 71 GetBitContext *gb = &vc->gb;
486 71 unsigned i, vorbis_time_count = get_bits(gb, 6) + 1;
487
488
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 142 for (i = 0; i < vorbis_time_count; ++i) {
489 71 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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 71 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 71 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 71 static int vorbis_parse_setup_hdr_floors(vorbis_context *vc)
510 {
511 71 GetBitContext *gb = &vc->gb;
512 int i, j, k, ret;
513
514 71 vc->floor_count = get_bits(gb, 6) + 1;
515
516 71 vc->floors = av_mallocz(vc->floor_count * sizeof(*vc->floors));
517
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 71 if (!vc->floors)
518 ✗ return AVERROR(ENOMEM);
519
520
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 213 for (i = 0; i < vc->floor_count; ++i) {
521 142 vorbis_floor *floor_setup = &vc->floors[i];
522
523 142 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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 142 if (floor_setup->floor_type == 1) {
528 98 int maximum_class = -1;
529 98 unsigned rangebits, rangemax, floor1_values = 2;
530
531 98 floor_setup->decode = vorbis_floor1_decode;
532
533 98 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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 650 for (j = 0; j < floor_setup->data.t1.partitions; ++j) {
539 552 floor_setup->data.t1.partition_class[j] = get_bits(gb, 4);
540
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 552 if (floor_setup->data.t1.partition_class[j] > maximum_class)
541 353 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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 451 for (j = 0; j <= maximum_class; ++j) {
551 353 floor_setup->data.t1.class_dimensions[j] = get_bits(gb, 3) + 1;
552 353 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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 353 if (floor_setup->data.t1.class_subclasses[j]) {
559
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 292 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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 1362 for (k = 0; k < (1 << floor_setup->data.t1.class_subclasses[j]); ++k) {
565 1009 int16_t bits = get_bits(gb, 8) - 1;
566
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 1009 if (bits != -1)
567
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 837 VALIDATE_INDEX(bits, vc->codebook_count)
568 1009 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 98 floor_setup->data.t1.multiplier = get_bits(gb, 2) + 1;
575 98 floor_setup->data.t1.x_list_dim = 2;
576
577
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 650 for (j = 0; j < floor_setup->data.t1.partitions; ++j)
578 552 floor_setup->data.t1.x_list_dim+=floor_setup->data.t1.class_dimensions[floor_setup->data.t1.partition_class[j]];
579
580 98 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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 98 if (!floor_setup->data.t1.list)
583 ✗ return AVERROR(ENOMEM);
584
585 98 rangebits = get_bits(gb, 4);
586
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 98 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 98 rangemax = (1 << rangebits);
592
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 98 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 98 floor_setup->data.t1.list[0].x = 0;
599 98 floor_setup->data.t1.list[1].x = rangemax;
600
601
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 650 for (j = 0; j < floor_setup->data.t1.partitions; ++j) {
602
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 2340 for (k = 0; k < floor_setup->data.t1.class_dimensions[floor_setup->data.t1.partition_class[j]]; ++k, ++floor1_values) {
603 1788 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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 98 if (ff_vorbis_ready_floor1_list(vc->avctx,
612 floor_setup->data.t1.list,
613 98 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 71 return 0;
695 }
696
697 // Process residues part
698
699 71 static int vorbis_parse_setup_hdr_residues(vorbis_context *vc)
700 {
701 71 GetBitContext *gb = &vc->gb;
702 unsigned i, j, k;
703
704 71 vc->residue_count = get_bits(gb, 6)+1;
705 71 vc->residues = av_mallocz(vc->residue_count * sizeof(*vc->residues));
706
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 71 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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 213 for (i = 0; i < vc->residue_count; ++i) {
712 142 vorbis_residue *res_setup = &vc->residues[i];
713 uint8_t cascade[64];
714 unsigned high_bits, low_bits;
715
716 142 res_setup->type = get_bits(gb, 16);
717
718 ff_dlog(NULL, " %u. residue type %d\n", i, res_setup->type);
719
720 142 res_setup->begin = get_bits(gb, 24);
721 142 res_setup->end = get_bits(gb, 24);
722 142 res_setup->partition_size = get_bits(gb, 24) + 1;
723 /* Validations to prevent a buffer overflow later. */
724
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 142 if (res_setup->begin>res_setup->end ||
725
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 142 (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
733 142 res_setup->classifications = get_bits(gb, 6) + 1;
734
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 142 GET_VALIDATED_INDEX(res_setup->classbook, 8, vc->codebook_count)
735
736 142 res_setup->ptns_to_read =
737 142 (res_setup->end - res_setup->begin) / res_setup->partition_size;
738 284 res_setup->classifs = av_malloc_array(res_setup->ptns_to_read,
739 142 vc->audio_channels *
740 sizeof(*res_setup->classifs));
741
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 142 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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 1366 for (j = 0; j < res_setup->classifications; ++j) {
749 1224 high_bits = 0;
750 1224 low_bits = get_bits(gb, 3);
751
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 1224 if (get_bits1(gb))
752 4 high_bits = get_bits(gb, 5);
753 1224 cascade[j] = (high_bits << 3) + low_bits;
754
755 ff_dlog(NULL, " %u class cascade depth: %d\n", j, ilog(cascade[j]));
756 }
757
758 142 res_setup->maxpass = 0;
759
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 1366 for (j = 0; j < res_setup->classifications; ++j) {
760
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 11016 for (k = 0; k < 8; ++k) {
761
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 9792 if (cascade[j]&(1 << k)) {
762
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 1448 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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 1448 if (k>res_setup->maxpass)
768 116 res_setup->maxpass = k;
769 } else {
770 8344 res_setup->books[j][k] = -1;
771 }
772 }
773 }
774 }
775 71 return 0;
776 }
777
778 // Process mappings part
779
780 71 static int vorbis_parse_setup_hdr_mappings(vorbis_context *vc)
781 {
782 71 GetBitContext *gb = &vc->gb;
783 unsigned i, j;
784
785 71 vc->mapping_count = get_bits(gb, 6)+1;
786 71 vc->mappings = av_mallocz(vc->mapping_count * sizeof(*vc->mappings));
787
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 71 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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 211 for (i = 0; i < vc->mapping_count; ++i) {
793 140 vorbis_mapping *mapping_setup = &vc->mappings[i];
794
795
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 140 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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 140 if (get_bits1(gb)) {
800 4 mapping_setup->submaps = get_bits(gb, 4) + 1;
801 } else {
802 136 mapping_setup->submaps = 1;
803 }
804
805
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 140 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 90 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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 140 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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 140 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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 284 for (j = 0; j < mapping_setup->submaps; ++j) {
846 144 skip_bits(gb, 8); // FIXME check?
847
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 144 GET_VALIDATED_INDEX(mapping_setup->submap_floor[j], 8, vc->floor_count)
848
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 144 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 71 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 71 static int vorbis_parse_setup_hdr_modes(vorbis_context *vc)
896 {
897 71 GetBitContext *gb = &vc->gb;
898 unsigned i;
899
900 71 vc->mode_count = get_bits(gb, 6) + 1;
901 71 vc->modes = av_mallocz(vc->mode_count * sizeof(*vc->modes));
902
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 71 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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 213 for (i = 0; i < vc->mode_count; ++i) {
908 142 vorbis_mode *mode_setup = &vc->modes[i];
909
910 142 mode_setup->blockflag = get_bits1(gb);
911 142 mode_setup->windowtype = get_bits(gb, 16);
912 142 mode_setup->transformtype = get_bits(gb, 16);
913
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 142 if (mode_setup->transformtype != 0 || mode_setup->windowtype != 0) {
914 ✗ av_log(vc->avctx, AV_LOG_WARNING,
915 "Invalid mode: windowtype %u, transformtype %u (both must be 0)\n",
916 ✗ mode_setup->windowtype, mode_setup->transformtype);
917 }
918
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 142 GET_VALIDATED_INDEX(mode_setup->mapping, 8, vc->mapping_count);
919
920 ff_dlog(NULL, " %u mode: blockflag %d, windowtype %d, transformtype %d, mapping %d\n",
921 i, mode_setup->blockflag, mode_setup->windowtype,
922 mode_setup->transformtype, mode_setup->mapping);
923 }
924 71 return 0;
925 }
926
927 // Process the whole setup header using the functions above
928
929 71 static int vorbis_parse_setup_hdr(vorbis_context *vc)
930 {
931 71 GetBitContext *gb = &vc->gb;
932 int ret;
933
934
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 142 if ((get_bits(gb, 8) != 'v') || (get_bits(gb, 8) != 'o') ||
935
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 213 (get_bits(gb, 8) != 'r') || (get_bits(gb, 8) != 'b') ||
936
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 142 (get_bits(gb, 8) != 'i') || (get_bits(gb, 8) != 's')) {
937 ✗ av_log(vc->avctx, AV_LOG_ERROR, " Vorbis setup header packet corrupt (no vorbis signature). \n");
938 ✗ return AVERROR_INVALIDDATA;
939 }
940
941
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 71 if ((ret = vorbis_parse_setup_hdr_codebooks(vc))) {
942 ✗ av_log(vc->avctx, AV_LOG_ERROR, " Vorbis setup header packet corrupt (codebooks). \n");
943 ✗ return ret;
944 }
945
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 71 if ((ret = vorbis_parse_setup_hdr_tdtransforms(vc))) {
946 ✗ av_log(vc->avctx, AV_LOG_ERROR, " Vorbis setup header packet corrupt (time domain transforms). \n");
947 ✗ return ret;
948 }
949
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 71 if ((ret = vorbis_parse_setup_hdr_floors(vc))) {
950 ✗ av_log(vc->avctx, AV_LOG_ERROR, " Vorbis setup header packet corrupt (floors). \n");
951 ✗ return ret;
952 }
953
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 71 if ((ret = vorbis_parse_setup_hdr_residues(vc))) {
954 ✗ av_log(vc->avctx, AV_LOG_ERROR, " Vorbis setup header packet corrupt (residues). \n");
955 ✗ return ret;
956 }
957
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 71 if ((ret = vorbis_parse_setup_hdr_mappings(vc))) {
958 ✗ av_log(vc->avctx, AV_LOG_ERROR, " Vorbis setup header packet corrupt (mappings). \n");
959 ✗ return ret;
960 }
961
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 71 if ((ret = vorbis_parse_setup_hdr_modes(vc))) {
962 ✗ av_log(vc->avctx, AV_LOG_ERROR, " Vorbis setup header packet corrupt (modes). \n");
963 ✗ return ret;
964 }
965
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 71 if (!get_bits1(gb)) {
966 ✗ av_log(vc->avctx, AV_LOG_ERROR, " Vorbis setup header packet corrupt (framing flag). \n");
967 ✗ return AVERROR_INVALIDDATA; // framing flag bit unset error
968 }
969
970 71 return 0;
971 }
972
973 // Process the identification header
974
975 71 static int vorbis_parse_id_hdr(vorbis_context *vc)
976 {
977 71 GetBitContext *gb = &vc->gb;
978 unsigned bl0, bl1;
979 71 float scale = -1.0;
980 int ret;
981
982
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 142 if ((get_bits(gb, 8) != 'v') || (get_bits(gb, 8) != 'o') ||
983
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 213 (get_bits(gb, 8) != 'r') || (get_bits(gb, 8) != 'b') ||
984
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 142 (get_bits(gb, 8) != 'i') || (get_bits(gb, 8) != 's')) {
985 ✗ av_log(vc->avctx, AV_LOG_ERROR, " Vorbis id header packet corrupt (no vorbis signature). \n");
986 ✗ return AVERROR_INVALIDDATA;
987 }
988
989 71 vc->version = get_bits_long(gb, 32); //FIXME check 0
990 71 vc->audio_channels = get_bits(gb, 8);
991
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 71 if (vc->audio_channels <= 0) {
992 ✗ av_log(vc->avctx, AV_LOG_ERROR, "Invalid number of channels\n");
993 ✗ return AVERROR_INVALIDDATA;
994 }
995 71 vc->audio_samplerate = get_bits_long(gb, 32);
996
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 71 if (vc->audio_samplerate <= 0) {
997 ✗ av_log(vc->avctx, AV_LOG_ERROR, "Invalid samplerate\n");
998 ✗ return AVERROR_INVALIDDATA;
999 }
1000 71 vc->bitrate_maximum = get_bits_long(gb, 32);
1001 71 vc->bitrate_nominal = get_bits_long(gb, 32);
1002 71 vc->bitrate_minimum = get_bits_long(gb, 32);
1003 71 bl0 = get_bits(gb, 4);
1004 71 bl1 = get_bits(gb, 4);
1005
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 71 if (bl0 > 13 || bl0 < 6 || bl1 > 13 || bl1 < 6 || bl1 < bl0) {
1006 ✗ av_log(vc->avctx, AV_LOG_ERROR, " Vorbis id header packet corrupt (illegal blocksize). \n");
1007 ✗ return AVERROR_INVALIDDATA;
1008 }
1009 71 vc->blocksize[0] = (1 << bl0);
1010 71 vc->blocksize[1] = (1 << bl1);
1011 71 vc->win[0] = ff_vorbis_vwin[bl0 - 6];
1012 71 vc->win[1] = ff_vorbis_vwin[bl1 - 6];
1013
1014
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 71 if ((get_bits1(gb)) == 0) {
1015 ✗ av_log(vc->avctx, AV_LOG_ERROR, " Vorbis id header packet corrupt (framing flag not set). \n");
1016 ✗ return AVERROR_INVALIDDATA;
1017 }
1018
1019 71 vc->channel_residues = av_malloc_array(vc->blocksize[1] / 2, vc->audio_channels * sizeof(*vc->channel_residues));
1020 71 vc->saved = av_calloc(vc->blocksize[1] / 4, vc->audio_channels * sizeof(*vc->saved));
1021
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 71 if (!vc->channel_residues || !vc->saved)
1022 ✗ return AVERROR(ENOMEM);
1023
1024 71 vc->previous_window = -1;
1025
1026 71 ret = av_tx_init(&vc->mdct[0], &vc->mdct_fn[0], AV_TX_FLOAT_MDCT, 1,
1027 71 vc->blocksize[0] >> 1, &scale, 0);
1028
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 71 if (ret < 0)
1029 ✗ return ret;
1030
1031 71 ret = av_tx_init(&vc->mdct[1], &vc->mdct_fn[1], AV_TX_FLOAT_MDCT, 1,
1032 71 vc->blocksize[1] >> 1, &scale, 0);
1033
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 71 if (ret < 0)
1034 ✗ return ret;
1035
1036 71 vc->fdsp = avpriv_float_dsp_alloc(vc->avctx->flags & AV_CODEC_FLAG_BITEXACT);
1037
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 71 if (!vc->fdsp)
1038 ✗ return AVERROR(ENOMEM);
1039
1040 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 ",
1041 vc->version, vc->audio_channels, vc->audio_samplerate, vc->bitrate_maximum, vc->bitrate_nominal, vc->bitrate_minimum, vc->blocksize[0], vc->blocksize[1]);
1042
1043 /*
1044 BLK = vc->blocksize[0];
1045 for (i = 0; i < BLK / 2; ++i) {
1046 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)));
1047 }
1048 */
1049
1050 71 return 0;
1051 }
1052
1053 // Process the extradata using the functions above (identification header, setup header)
1054
1055 71 static av_cold int vorbis_decode_init(AVCodecContext *avctx)
1056 {
1057 71 vorbis_context *vc = avctx->priv_data;
1058 71 uint8_t *headers = avctx->extradata;
1059 71 int headers_len = avctx->extradata_size;
1060 const uint8_t *header_start[3];
1061 int header_len[3];
1062 71 GetBitContext *gb = &vc->gb;
1063 int hdr_type, ret;
1064
1065 71 vc->avctx = avctx;
1066 71 ff_vorbisdsp_init(&vc->dsp);
1067
1068 71 avctx->sample_fmt = AV_SAMPLE_FMT_FLTP;
1069
1070
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 71 if (!headers_len) {
1071 ✗ av_log(avctx, AV_LOG_ERROR, "Extradata missing.\n");
1072 ✗ return AVERROR_INVALIDDATA;
1073 }
1074
1075
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 71 if ((ret = avpriv_split_xiph_headers(headers, headers_len, 30, header_start, header_len)) < 0) {
1076 ✗ av_log(avctx, AV_LOG_ERROR, "Extradata corrupt.\n");
1077 ✗ return ret;
1078 }
1079
1080 71 init_get_bits(gb, header_start[0], header_len[0]*8);
1081 71 hdr_type = get_bits(gb, 8);
1082
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 71 if (hdr_type != 1) {
1083 ✗ av_log(avctx, AV_LOG_ERROR, "First header is not the id header.\n");
1084 ✗ return AVERROR_INVALIDDATA;
1085 }
1086
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 71 if ((ret = vorbis_parse_id_hdr(vc))) {
1087 ✗ av_log(avctx, AV_LOG_ERROR, "Id header corrupt.\n");
1088 ✗ vorbis_free(vc);
1089 ✗ return ret;
1090 }
1091
1092 71 init_get_bits(gb, header_start[2], header_len[2]*8);
1093 71 hdr_type = get_bits(gb, 8);
1094
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 71 if (hdr_type != 5) {
1095 ✗ av_log(avctx, AV_LOG_ERROR, "Third header is not the setup header.\n");
1096 ✗ vorbis_free(vc);
1097 ✗ return AVERROR_INVALIDDATA;
1098 }
1099
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 71 if ((ret = vorbis_parse_setup_hdr(vc))) {
1100 ✗ av_log(avctx, AV_LOG_ERROR, "Setup header corrupt.\n");
1101 ✗ vorbis_free(vc);
1102 ✗ return ret;
1103 }
1104
1105 71 av_channel_layout_uninit(&avctx->ch_layout);
1106
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 71 if (vc->audio_channels > 8) {
1107 ✗ avctx->ch_layout.order = AV_CHANNEL_ORDER_UNSPEC;
1108 ✗ avctx->ch_layout.nb_channels = vc->audio_channels;
1109 } else {
1110 71 av_channel_layout_copy(&avctx->ch_layout, &ff_vorbis_ch_layouts[vc->audio_channels - 1]);
1111 }
1112
1113 71 avctx->sample_rate = vc->audio_samplerate;
1114
1115 71 return 0;
1116 }
1117
1118 // Decode audiopackets -------------------------------------------------
1119
1120 // Read and decode floor
1121
1122 6375 static int vorbis_floor0_decode(vorbis_context *vc,
1123 vorbis_floor_data *vfu, float *vec)
1124 {
1125 6375 vorbis_floor0 *vf = &vfu->t0;
1126 6375 float *lsp = vf->lsp;
1127 unsigned book_idx;
1128 uint64_t amplitude;
1129 6375 unsigned blockflag = vc->modes[vc->mode_number].blockflag;
1130
1131
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 6375 if (!vf->amplitude_bits)
1132 ✗ return 1;
1133
1134 6375 amplitude = get_bits64(&vc->gb, vf->amplitude_bits);
1135
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 6375 if (amplitude > 0) {
1136 6251 float last = 0;
1137 6251 unsigned idx, lsp_len = 0;
1138 vorbis_codebook codebook;
1139
1140 6251 book_idx = get_bits(&vc->gb, ilog(vf->num_books));
1141
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 6251 if (book_idx >= vf->num_books) {
1142 ✗ av_log(vc->avctx, AV_LOG_ERROR, "floor0 dec: booknumber too high!\n");
1143 ✗ book_idx = 0;
1144 }
1145 ff_dlog(NULL, "floor0 dec: booknumber: %u\n", book_idx);
1146 6251 codebook = vc->codebooks[vf->book_list[book_idx]];
1147 /* Invalid codebook! */
1148
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 6251 if (!codebook.codevectors)
1149 ✗ return AVERROR_INVALIDDATA;
1150
1151
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 56599 while (lsp_len<vf->order) {
1152 int vec_off;
1153
1154 ff_dlog(NULL, "floor0 dec: book dimension: %d\n", codebook.dimensions);
1155 ff_dlog(NULL, "floor0 dec: maximum depth: %d\n", codebook.maxdepth);
1156 /* read temp vector */
1157 50348 vec_off = get_vlc2(&vc->gb, codebook.vlc.table,
1158 50348 codebook.nb_bits, 3);
1159
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 50348 if (vec_off < 0)
1160 ✗ return AVERROR_INVALIDDATA;
1161 50348 vec_off *= codebook.dimensions;
1162 ff_dlog(NULL, "floor0 dec: vector offset: %d\n", vec_off);
1163 /* copy each vector component and add last to it */
1164
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 195920 for (idx = 0; idx < codebook.dimensions; ++idx)
1165 145572 lsp[lsp_len+idx] = codebook.codevectors[vec_off+idx] + last;
1166 50348 last = lsp[lsp_len+idx-1]; /* set last to last vector component */
1167
1168 50348 lsp_len += codebook.dimensions;
1169 }
1170 /* DEBUG: output lsp coeffs */
1171 {
1172 int idx;
1173
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 151823 for (idx = 0; idx < lsp_len; ++idx)
1174 ff_dlog(NULL, "floor0 dec: coeff at %d is %f\n", idx, lsp[idx]);
1175 }
1176
1177 /* synthesize floor output vector */
1178 {
1179 int i;
1180 6251 int order = vf->order;
1181 6251 float wstep = M_PI / vf->bark_map_size;
1182
1183
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 151823 for (i = 0; i < order; i++)
1184 145572 lsp[i] = 2.0f * cos(lsp[i]);
1185
1186 ff_dlog(NULL, "floor0 synth: map_size = %"PRIu32"; m = %d; wstep = %f\n",
1187 vf->map_size[blockflag], order, wstep);
1188
1189 6251 i = 0;
1190
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 945341 while (i < vf->map_size[blockflag]) {
1191 939090 int j, iter_cond = vf->map[blockflag][i];
1192 939090 float p = 0.5f;
1193 939090 float q = 0.5f;
1194 939090 float two_cos_w = 2.0f * cos(wstep * iter_cond); // needed all times
1195
1196 /* similar part for the q and p products */
1197
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 14107686 for (j = 0; j + 1 < order; j += 2) {
1198 13168596 q *= lsp[j] - two_cos_w;
1199 13168596 p *= lsp[j + 1] - two_cos_w;
1200 }
1201
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 939090 if (j == order) { // even order
1202 925416 p *= p * (2.0f - two_cos_w);
1203 925416 q *= q * (2.0f + two_cos_w);
1204 } else { // odd order
1205 13674 q *= two_cos_w-lsp[j]; // one more time for q
1206
1207 /* final step and square */
1208 13674 p *= p * (4.f - two_cos_w * two_cos_w);
1209 13674 q *= q;
1210 }
1211
1212
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 939090 if (p + q == 0.0)
1213 ✗ return AVERROR_INVALIDDATA;
1214
1215 /* calculate linear floor value */
1216 939090 q = exp((((amplitude*vf->amplitude_offset) /
1217 939090 (((1ULL << vf->amplitude_bits) - 1) * sqrt(p + q)))
1218 939090 - vf->amplitude_offset) * .11512925f);
1219
1220 /* fill vector */
1221 do {
1222 4384000 vec[i] = q; ++i;
1223
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 4384000 } while (vf->map[blockflag][i] == iter_cond);
1224 }
1225 }
1226 } else {
1227 /* this channel is unused */
1228 124 return 1;
1229 }
1230
1231 ff_dlog(NULL, " Floor0 decoded\n");
1232
1233 6251 return 0;
1234 }
1235
1236 11478 static int vorbis_floor1_decode(vorbis_context *vc,
1237 vorbis_floor_data *vfu, float *vec)
1238 {
1239 11478 vorbis_floor1 *vf = &vfu->t1;
1240 11478 GetBitContext *gb = &vc->gb;
1241 11478 uint16_t range_v[4] = { 256, 128, 86, 64 };
1242 11478 unsigned range = range_v[vf->multiplier - 1];
1243 uint16_t floor1_Y[258];
1244 uint16_t floor1_Y_final[258];
1245 int floor1_flag[258];
1246 unsigned partition_class, cdim, cbits, csub, cval, offset, i, j;
1247 int book, adx, ady, dy, off, predicted, err;
1248
1249
1250
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 11478 if (!get_bits1(gb)) // silence
1251 2001 return 1;
1252
1253 // Read values (or differences) for the floor's points
1254
1255 9477 floor1_Y[0] = get_bits(gb, ilog(range - 1));
1256 9477 floor1_Y[1] = get_bits(gb, ilog(range - 1));
1257
1258 ff_dlog(NULL, "floor 0 Y %d floor 1 Y %d \n", floor1_Y[0], floor1_Y[1]);
1259
1260 9477 offset = 2;
1261
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 78342 for (i = 0; i < vf->partitions; ++i) {
1262 68865 partition_class = vf->partition_class[i];
1263 68865 cdim = vf->class_dimensions[partition_class];
1264 68865 cbits = vf->class_subclasses[partition_class];
1265 68865 csub = (1 << cbits) - 1;
1266 68865 cval = 0;
1267
1268 ff_dlog(NULL, "Cbits %u\n", cbits);
1269
1270
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 68865 if (cbits) // this reads all subclasses for this partition's class
1271 62935 cval = get_vlc2(gb, vc->codebooks[vf->class_masterbook[partition_class]].vlc.table,
1272 62935 vc->codebooks[vf->class_masterbook[partition_class]].nb_bits, 3);
1273
1274
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 285560 for (j = 0; j < cdim; ++j) {
1275 216695 book = vf->subclass_books[partition_class][cval & csub];
1276
1277 ff_dlog(NULL, "book %d Cbits %u cval %u bits:%d\n",
1278 book, cbits, cval, get_bits_count(gb));
1279
1280 216695 cval = cval >> cbits;
1281
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 216695 if (book > -1) {
1282 114081 int v = get_vlc2(gb, vc->codebooks[book].vlc.table,
1283 114081 vc->codebooks[book].nb_bits, 3);
1284
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 114081 if (v < 0)
1285 ✗ return AVERROR_INVALIDDATA;
1286 114081 floor1_Y[offset+j] = v;
1287 } else {
1288 102614 floor1_Y[offset+j] = 0;
1289 }
1290
1291 ff_dlog(NULL, " floor(%d) = %d \n",
1292 vf->list[offset+j].x, floor1_Y[offset+j]);
1293 }
1294 68865 offset+=cdim;
1295 }
1296
1297 // Amplitude calculation from the differences
1298
1299 9477 floor1_flag[0] = 1;
1300 9477 floor1_flag[1] = 1;
1301 9477 floor1_Y_final[0] = floor1_Y[0];
1302 9477 floor1_Y_final[1] = floor1_Y[1];
1303
1304
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 226172 for (i = 2; i < vf->x_list_dim; ++i) {
1305 unsigned val, highroom, lowroom, room, high_neigh_offs, low_neigh_offs;
1306
1307 216695 low_neigh_offs = vf->list[i].low;
1308 216695 high_neigh_offs = vf->list[i].high;
1309 216695 dy = floor1_Y_final[high_neigh_offs] - floor1_Y_final[low_neigh_offs]; // render_point begin
1310 216695 adx = vf->list[high_neigh_offs].x - vf->list[low_neigh_offs].x;
1311 216695 ady = FFABS(dy);
1312 216695 err = ady * (vf->list[i].x - vf->list[low_neigh_offs].x);
1313 216695 off = err / adx;
1314
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 216695 if (dy < 0) {
1315 119671 predicted = floor1_Y_final[low_neigh_offs] - off;
1316 } else {
1317 97024 predicted = floor1_Y_final[low_neigh_offs] + off;
1318 } // render_point end
1319
1320 216695 val = floor1_Y[i];
1321 216695 highroom = range-predicted;
1322 216695 lowroom = predicted;
1323
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 216695 if (highroom < lowroom) {
1324 88049 room = highroom * 2;
1325 } else {
1326 128646 room = lowroom * 2; // SPEC misspelling
1327 }
1328
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 216695 if (val) {
1329 98124 floor1_flag[low_neigh_offs] = 1;
1330 98124 floor1_flag[high_neigh_offs] = 1;
1331 98124 floor1_flag[i] = 1;
1332
2/2
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✓ Branch 1 taken 98001 times.
 98124 if (val >= room) {
1333
2/2
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✓ Branch 1 taken 43 times.
 123 if (highroom > lowroom) {
1334 80 floor1_Y_final[i] = av_clip_uint16(val - lowroom + predicted);
1335 } else {
1336 43 floor1_Y_final[i] = av_clip_uint16(predicted - val + highroom - 1);
1337 }
1338 } else {
1339
2/2
✓ Branch 0 taken 63615 times.
✓ Branch 1 taken 34386 times.
 98001 if (val & 1) {
1340 63615 floor1_Y_final[i] = av_clip_uint16(predicted - (val + 1) / 2);
1341 } else {
1342 34386 floor1_Y_final[i] = av_clip_uint16(predicted + val / 2);
1343 }
1344 }
1345 } else {
1346 118571 floor1_flag[i] = 0;
1347 118571 floor1_Y_final[i] = av_clip_uint16(predicted);
1348 }
1349
1350 ff_dlog(NULL, " Decoded floor(%d) = %u / val %u\n",
1351 vf->list[i].x, floor1_Y_final[i], val);
1352 }
1353
1354 // Curve synth - connect the calculated dots and convert from dB scale FIXME optimize ?
1355
1356 9477 ff_vorbis_floor1_render_list(vf->list, vf->x_list_dim, floor1_Y_final, floor1_flag, vf->multiplier, vec, vf->list[1].x);
1357
1358 ff_dlog(NULL, " Floor decoded\n");
1359
1360 9477 return 0;
1361 }
1362
1363 134699 static av_always_inline int setup_classifs(vorbis_context *vc,
1364 vorbis_residue *vr,
1365 uint8_t *do_not_decode,
1366 unsigned ch_used,
1367 int partition_count,
1368 int ptns_to_read
1369 )
1370 {
1371 134699 vorbis_codebook *codebook = vc->codebooks + vr->classbook;
1372 int p, j, i;
1373 134699 unsigned c_p_c = codebook->dimensions;
1374 134699 unsigned inverse_class = ff_inverse[vr->classifications];
1375 int temp, temp2;
1376
2/2
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 298651 for (p = 0, j = 0; j < ch_used; ++j) {
1377
2/2
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✓ Branch 1 taken 1321 times.
 163952 if (!do_not_decode[j]) {
1378 162631 temp = get_vlc2(&vc->gb, codebook->vlc.table,
1379 162631 codebook->nb_bits, 3);
1380
1381 ff_dlog(NULL, "Classword: %u\n", temp);
1382
1383
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 162631 av_assert0(temp < 65536);
1384
1385
1/2
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 162631 if (temp < 0) {
1386 ✗ av_log(vc->avctx, AV_LOG_ERROR,
1387 "Invalid vlc code decoding %d channel.", j);
1388 ✗ return AVERROR_INVALIDDATA;
1389 }
1390
1391
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 162631 times.
 162631 if (vr->classifications == 1) {
1392 ✗ for (i = partition_count + c_p_c - 1; i >= partition_count; i--) {
1393 ✗ if (i < ptns_to_read)
1394 ✗ vr->classifs[p + i] = 0;
1395 }
1396 } else {
1397
2/2
✓ Branch 0 taken 344379 times.
✓ Branch 1 taken 162631 times.
 507010 for (i = partition_count + c_p_c - 1; i >= partition_count; i--) {
1398 344379 temp2 = (((uint64_t)temp) * inverse_class) >> 32;
1399
1400
2/2
✓ Branch 0 taken 344148 times.
✓ Branch 1 taken 231 times.
 344379 if (i < ptns_to_read)
1401 344148 vr->classifs[p + i] = temp - temp2 * vr->classifications;
1402 344379 temp = temp2;
1403 }
1404 }
1405 }
1406 163952 p += ptns_to_read;
1407 }
1408 134699 return 0;
1409 }
1410 // Read and decode residue
1411
1412 9510 static av_always_inline int vorbis_residue_decode_internal(vorbis_context *vc,
1413 vorbis_residue *vr,
1414 unsigned ch,
1415 uint8_t *do_not_decode,
1416 float *vec,
1417 unsigned vlen,
1418 unsigned ch_left,
1419 int vr_type)
1420 {
1421 9510 GetBitContext *gb = &vc->gb;
1422 9510 unsigned c_p_c = vc->codebooks[vr->classbook].dimensions;
1423 9510 uint8_t *classifs = vr->classifs;
1424 unsigned pass, ch_used, i, j, k, l;
1425 9510 unsigned max_output = (ch - 1) * vlen;
1426 9510 int ptns_to_read = vr->ptns_to_read;
1427 9510 int libvorbis_bug = 0;
1428
1429
2/2
✓ Branch 0 taken 4275 times.
✓ Branch 1 taken 5235 times.
 9510 if (vr_type == 2) {
1430
2/2
✓ Branch 0 taken 5388 times.
✓ Branch 1 taken 4275 times.
 9663 for (j = 1; j < ch; ++j)
1431 5388 do_not_decode[0] &= do_not_decode[j]; // FIXME - clobbering input
1432
2/2
✓ Branch 0 taken 120 times.
✓ Branch 1 taken 4155 times.
 4275 if (do_not_decode[0])
1433 120 return 0;
1434 4155 ch_used = 1;
1435 4155 max_output += vr->end / ch;
1436 } else {
1437 5235 ch_used = ch;
1438 5235 max_output += vr->end;
1439 }
1440
1441
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 9390 times.
 9390 if (max_output > ch_left * vlen) {
1442 ✗ if (max_output <= ch_left * vlen + vr->partition_size*ch_used/ch) {
1443 ✗ ptns_to_read--;
1444 ✗ libvorbis_bug = 1;
1445 } else {
1446 ✗ av_log(vc->avctx, AV_LOG_ERROR, "Insufficient output buffer\n");
1447 ✗ return AVERROR_INVALIDDATA;
1448 }
1449 }
1450
1451 ff_dlog(NULL, " residue type 0/1/2 decode begin, ch: %d cpc %d \n", ch, c_p_c);
1452
1453
2/2
✓ Branch 0 taken 21649 times.
✓ Branch 1 taken 9390 times.
 31039 for (pass = 0; pass <= vr->maxpass; ++pass) { // FIXME OPTIMIZE?
1454 int voffset, partition_count, j_times_ptns_to_read;
1455
1456 21649 voffset = vr->begin;
1457
2/2
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✓ Branch 1 taken 21649 times.
 371735 for (partition_count = 0; partition_count < ptns_to_read;) { // SPEC error
1458
2/2
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✓ Branch 1 taken 215387 times.
 350086 if (!pass) {
1459 134699 int ret = setup_classifs(vc, vr, do_not_decode, ch_used, partition_count, ptns_to_read);
1460
1/2
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✓ Branch 1 taken 134699 times.
 134699 if (ret < 0)
1461 ✗ return ret;
1462 }
1463
4/4
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✓ Branch 2 taken 735704 times.
✓ Branch 3 taken 693 times.
 1085790 for (i = 0; (i < c_p_c) && (partition_count < ptns_to_read); ++i) {
1464
2/2
✓ Branch 0 taken 798242 times.
✓ Branch 1 taken 735704 times.
 1533946 for (j_times_ptns_to_read = 0, j = 0; j < ch_used; ++j) {
1465 unsigned voffs;
1466
1467
2/2
✓ Branch 0 taken 794226 times.
✓ Branch 1 taken 4016 times.
 798242 if (!do_not_decode[j]) {
1468 794226 unsigned vqclass = classifs[j_times_ptns_to_read + partition_count];
1469 794226 int vqbook = vr->books[vqclass][pass];
1470
1471
3/4
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✓ Branch 1 taken 472401 times.
✓ Branch 2 taken 321825 times.
✗ Branch 3 not taken.
 794226 if (vqbook >= 0 && vc->codebooks[vqbook].codevectors) {
1472 int coffs;
1473 321825 unsigned dim = vc->codebooks[vqbook].dimensions;
1474 321825 unsigned step = FASTDIV(vr->partition_size << 1, dim << 1);
1475 321825 vorbis_codebook codebook = vc->codebooks[vqbook];
1476
1477
1/2
✗ Branch 1 not taken.
✓ Branch 2 taken 321825 times.
 321825 if (get_bits_left(gb) < 0) {
1478 ✗ av_log(vc->avctx, AV_LOG_ERROR, "Overread %d bits\n", -get_bits_left(gb));
1479 ✗ return 0;
1480 }
1481
1482
2/2
✓ Branch 0 taken 115082 times.
✓ Branch 1 taken 206743 times.
 321825 if (vr_type == 0) {
1483
1484 115082 voffs = voffset+j*vlen;
1485
2/2
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✓ Branch 1 taken 115082 times.
 1357906 for (k = 0; k < step; ++k) {
1486 1242824 coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3);
1487
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 1242824 times.
 1242824 if (coffs < 0)
1488 ✗ return coffs;
1489 1242824 coffs *= dim;
1490
2/2
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✓ Branch 1 taken 1242824 times.
 4778728 for (l = 0; l < dim; ++l)
1491 3535904 vec[voffs + k + l * step] += codebook.codevectors[coffs + l];
1492 }
1493
2/2
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✓ Branch 1 taken 178959 times.
 206743 } else if (vr_type == 1) {
1494 27784 voffs = voffset + j * vlen;
1495
2/2
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✓ Branch 1 taken 27784 times.
 314938 for (k = 0; k < step; ++k) {
1496 287154 coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3);
1497
1/2
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✓ Branch 1 taken 287154 times.
 287154 if (coffs < 0)
1498 ✗ return coffs;
1499 287154 coffs *= dim;
1500
2/2
✓ Branch 0 taken 791460 times.
✓ Branch 1 taken 287154 times.
 1078614 for (l = 0; l < dim; ++l, ++voffs) {
1501 791460 vec[voffs]+=codebook.codevectors[coffs+l];
1502
1503 ff_dlog(NULL, " pass %d offs: %d curr: %f change: %f cv offs.: %d \n",
1504 pass, voffs, vec[voffs], codebook.codevectors[coffs+l], coffs);
1505 }
1506 }
1507
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
1508 151234 voffs = voffset >> 1;
1509
1510
2/2
✓ Branch 0 taken 64528 times.
✓ Branch 1 taken 86706 times.
 151234 if (dim == 2) {
1511
2/2
✓ Branch 0 taken 1004556 times.
✓ Branch 1 taken 64528 times.
 1069084 for (k = 0; k < step; ++k) {
1512 1004556 coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3);
1513
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 1004556 times.
 1004556 if (coffs < 0)
1514 ✗ return coffs;
1515 1004556 coffs *= 2;
1516 1004556 vec[voffs + k ] += codebook.codevectors[coffs ];
1517 1004556 vec[voffs + k + vlen] += codebook.codevectors[coffs + 1];
1518 }
1519
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✓ Branch 1 taken 23632 times.
 86706 } else if (dim == 4) {
1520
2/2
✓ Branch 0 taken 447102 times.
✓ Branch 1 taken 63074 times.
 510176 for (k = 0; k < step; ++k, voffs += 2) {
1521 447102 coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3);
1522
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 447102 times.
 447102 if (coffs < 0)
1523 ✗ return coffs;
1524 447102 coffs *= 4;
1525 447102 vec[voffs ] += codebook.codevectors[coffs ];
1526 447102 vec[voffs + 1 ] += codebook.codevectors[coffs + 2];
1527 447102 vec[voffs + vlen ] += codebook.codevectors[coffs + 1];
1528 447102 vec[voffs + vlen + 1] += codebook.codevectors[coffs + 3];
1529 }
1530 } else
1531
2/2
✓ Branch 0 taken 94166 times.
✓ Branch 1 taken 23632 times.
 117798 for (k = 0; k < step; ++k) {
1532 94166 coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3);
1533
1/2
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✓ Branch 1 taken 94166 times.
 94166 if (coffs < 0)
1534 ✗ return coffs;
1535 94166 coffs *= dim;
1536
2/2
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✓ Branch 1 taken 94166 times.
 470830 for (l = 0; l < dim; l += 2, voffs++) {
1537 376664 vec[voffs ] += codebook.codevectors[coffs + l ];
1538 376664 vec[voffs + vlen] += codebook.codevectors[coffs + l + 1];
1539
1540 ff_dlog(NULL, " pass %d offs: %d curr: %f change: %f cv offs.: %d+%d \n",
1541 pass, voffset / ch + (voffs % ch) * vlen,
1542 vec[voffset / ch + (voffs % ch) * vlen],
1543 codebook.codevectors[coffs + l], coffs, l);
1544 }
1545 }
1546
1547
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✗ Branch 1 not taken.
 27725 } else if (vr_type == 2) {
1548
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✗ Branch 1 not taken.
 27725 unsigned voffs_div = ch == 1 ? voffset : FASTDIV(voffset, ch);
1549 27725 unsigned voffs_mod = voffset - voffs_div * ch;
1550
1551
2/2
✓ Branch 0 taken 164109 times.
✓ Branch 1 taken 27725 times.
 191834 for (k = 0; k < step; ++k) {
1552 164109 coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3);
1553
1/2
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✓ Branch 1 taken 164109 times.
 164109 if (coffs < 0)
1554 ✗ return coffs;
1555 164109 coffs *= dim;
1556
2/2
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✓ Branch 1 taken 164109 times.
 912594 for (l = 0; l < dim; ++l) {
1557 748485 vec[voffs_div + voffs_mod * vlen] +=
1558 748485 codebook.codevectors[coffs + l];
1559
1560 ff_dlog(NULL, " pass %d offs: %d curr: %f change: %f cv offs.: %d+%d \n",
1561 pass, voffs_div + voffs_mod * vlen,
1562 vec[voffs_div + voffs_mod * vlen],
1563 codebook.codevectors[coffs + l], coffs, l);
1564
1565
2/2
✓ Branch 0 taken 149697 times.
✓ Branch 1 taken 598788 times.
 748485 if (++voffs_mod == ch) {
1566 149697 voffs_div++;
1567 149697 voffs_mod = 0;
1568 }
1569 }
1570 }
1571 }
1572 }
1573 }
1574 798242 j_times_ptns_to_read += ptns_to_read;
1575 }
1576 735704 ++partition_count;
1577 735704 voffset += vr->partition_size;
1578 }
1579 }
1580
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✗ Branch 2 not taken.
✗ Branch 3 not taken.
 21649 if (libvorbis_bug && !pass) {
1581 ✗ for (j = 0; j < ch_used; ++j) {
1582 ✗ if (!do_not_decode[j]) {
1583 ✗ get_vlc2(&vc->gb, vc->codebooks[vr->classbook].vlc.table,
1584 ✗ vc->codebooks[vr->classbook].nb_bits, 3);
1585 }
1586 }
1587 }
1588 }
1589 9390 return 0;
1590 }
1591
1592 9510 static inline int vorbis_residue_decode(vorbis_context *vc, vorbis_residue *vr,
1593 unsigned ch,
1594 uint8_t *do_not_decode,
1595 float *vec, unsigned vlen,
1596 unsigned ch_left)
1597 {
1598
2/2
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✓ Branch 1 taken 5235 times.
 9510 if (vr->type == 2)
1599 4275 return vorbis_residue_decode_internal(vc, vr, ch, do_not_decode, vec, vlen, ch_left, 2);
1600
2/2
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✓ Branch 1 taken 3420 times.
 5235 else if (vr->type == 1)
1601 1815 return vorbis_residue_decode_internal(vc, vr, ch, do_not_decode, vec, vlen, ch_left, 1);
1602
1/2
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✗ Branch 1 not taken.
 3420 else if (vr->type == 0)
1603 3420 return vorbis_residue_decode_internal(vc, vr, ch, do_not_decode, vec, vlen, ch_left, 0);
1604 else {
1605 ✗ av_log(vc->avctx, AV_LOG_ERROR, " Invalid residue type while residue decode?! \n");
1606 ✗ return AVERROR_INVALIDDATA;
1607 }
1608 }
1609
1610 // Decode the audio packet using the functions above
1611
1612 9139 static int vorbis_parse_audio_packet(vorbis_context *vc, float **floor_ptr)
1613 {
1614 9139 GetBitContext *gb = &vc->gb;
1615 AVTXContext *mdct;
1616 av_tx_fn mdct_fn;
1617 9139 int previous_window = vc->previous_window;
1618 unsigned mode_number, blockflag, blocksize;
1619 int i, j;
1620 uint8_t no_residue[255];
1621 uint8_t do_not_decode[255];
1622 vorbis_mapping *mapping;
1623 9139 float *ch_res_ptr = vc->channel_residues;
1624 uint8_t res_chan[255];
1625 9139 unsigned res_num = 0;
1626 9139 int retlen = 0;
1627 9139 unsigned ch_left = vc->audio_channels;
1628 unsigned vlen;
1629
1630
1/2
✗ Branch 1 not taken.
✓ Branch 2 taken 9139 times.
 9139 if (get_bits1(gb)) {
1631 ✗ av_log(vc->avctx, AV_LOG_ERROR, "Not a Vorbis I audio packet.\n");
1632 ✗ return AVERROR_INVALIDDATA; // packet type not audio
1633 }
1634
1635
1/2
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✓ Branch 1 taken 9139 times.
 9139 if (vc->mode_count == 1) {
1636 ✗ mode_number = 0;
1637 } else {
1638
1/2
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✓ Branch 2 taken 9139 times.
 9139 GET_VALIDATED_INDEX(mode_number, ilog(vc->mode_count-1), vc->mode_count)
1639 }
1640 9139 vc->mode_number = mode_number;
1641 9139 mapping = &vc->mappings[vc->modes[mode_number].mapping];
1642
1643 ff_dlog(NULL, " Mode number: %u , mapping: %d , blocktype %d\n", mode_number,
1644 vc->modes[mode_number].mapping, vc->modes[mode_number].blockflag);
1645
1646 9139 blockflag = vc->modes[mode_number].blockflag;
1647 9139 blocksize = vc->blocksize[blockflag];
1648 9139 vlen = blocksize / 2;
1649
2/2
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✓ Branch 1 taken 3156 times.
 9139 if (blockflag) {
1650 5983 int code = get_bits(gb, 2);
1651
2/2
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✓ Branch 1 taken 5980 times.
 5983 if (previous_window < 0)
1652 3 previous_window = code>>1;
1653
2/2
✓ Branch 0 taken 58 times.
✓ Branch 1 taken 3098 times.
 3156 } else if (previous_window < 0)
1654 58 previous_window = 0;
1655
1656 9139 memset(ch_res_ptr, 0, sizeof(float) * vc->audio_channels * vlen); //FIXME can this be removed ?
1657
2/2
✓ Branch 0 taken 17853 times.
✓ Branch 1 taken 9139 times.
 26992 for (i = 0; i < vc->audio_channels; ++i)
1658 17853 memset(floor_ptr[i], 0, vlen * sizeof(floor_ptr[0][0])); //FIXME can this be removed ?
1659
1660 // Decode floor
1661
1662
2/2
✓ Branch 0 taken 17853 times.
✓ Branch 1 taken 9139 times.
 26992 for (i = 0; i < vc->audio_channels; ++i) {
1663 vorbis_floor *floor;
1664 int ret;
1665
2/2
✓ Branch 0 taken 2226 times.
✓ Branch 1 taken 15627 times.
 17853 if (mapping->submaps > 1) {
1666 2226 floor = &vc->floors[mapping->submap_floor[mapping->mux[i]]];
1667 } else {
1668 15627 floor = &vc->floors[mapping->submap_floor[0]];
1669 }
1670
1671 17853 ret = floor->decode(vc, &floor->data, floor_ptr[i]);
1672
1673
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 17853 times.
 17853 if (ret < 0) {
1674 ✗ av_log(vc->avctx, AV_LOG_ERROR, "Invalid codebook in vorbis_floor_decode.\n");
1675 ✗ return AVERROR_INVALIDDATA;
1676 }
1677 17853 no_residue[i] = ret;
1678 }
1679
1680 // Nonzero vector propagate
1681
1682
2/2
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✓ Branch 1 taken 9139 times.
 14527 for (i = mapping->coupling_steps - 1; i >= 0; --i) {
1683
2/2
✓ Branch 0 taken 4732 times.
✓ Branch 1 taken 656 times.
 5388 if (!(no_residue[mapping->magnitude[i]] & no_residue[mapping->angle[i]])) {
1684 4732 no_residue[mapping->magnitude[i]] = 0;
1685 4732 no_residue[mapping->angle[i]] = 0;
1686 }
1687 }
1688
1689 // Decode residue
1690
1691
2/2
✓ Branch 0 taken 9510 times.
✓ Branch 1 taken 9139 times.
 18649 for (i = 0; i < mapping->submaps; ++i) {
1692 vorbis_residue *residue;
1693 9510 unsigned ch = 0;
1694 int ret;
1695
1696
2/2
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✓ Branch 1 taken 9510 times.
 29589 for (j = 0; j < vc->audio_channels; ++j) {
1697
4/4
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✓ Branch 2 taken 2226 times.
✓ Branch 3 taken 2226 times.
 20079 if ((mapping->submaps == 1) || (i == mapping->mux[j])) {
1698 17853 res_chan[j] = res_num;
1699
2/2
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✓ Branch 1 taken 16627 times.
 17853 if (no_residue[j]) {
1700 1226 do_not_decode[ch] = 1;
1701 } else {
1702 16627 do_not_decode[ch] = 0;
1703 }
1704 17853 ++ch;
1705 17853 ++res_num;
1706 }
1707 }
1708 9510 residue = &vc->residues[mapping->submap_residue[i]];
1709
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✓ Branch 1 taken 9510 times.
 9510 if (ch_left < ch) {
1710 ✗ av_log(vc->avctx, AV_LOG_ERROR, "Too many channels in vorbis_floor_decode.\n");
1711 ✗ return AVERROR_INVALIDDATA;
1712 }
1713
1/2
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✗ Branch 1 not taken.
 9510 if (ch) {
1714 9510 ret = vorbis_residue_decode(vc, residue, ch, do_not_decode, ch_res_ptr, vlen, ch_left);
1715
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 9510 if (ret < 0)
1716 ✗ return ret;
1717 }
1718
1719 9510 ch_res_ptr += ch * vlen;
1720 9510 ch_left -= ch;
1721 }
1722
1723
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 9139 if (ch_left > 0)
1724 ✗ return AVERROR_INVALIDDATA;
1725
1726 // Inverse coupling
1727
1728
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 14527 for (i = mapping->coupling_steps - 1; i >= 0; --i) { //warning: i has to be signed
1729 float *mag, *ang;
1730
1731 5388 mag = vc->channel_residues+res_chan[mapping->magnitude[i]] * blocksize / 2;
1732 5388 ang = vc->channel_residues+res_chan[mapping->angle[i]] * blocksize / 2;
1733 5388 vc->dsp.vorbis_inverse_coupling(mag, ang, blocksize / 2);
1734 }
1735
1736 // Dotproduct, MDCT
1737
1738 9139 mdct = vc->mdct[blockflag];
1739 9139 mdct_fn = vc->mdct_fn[blockflag];
1740
1741
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 26992 for (j = vc->audio_channels-1;j >= 0; j--) {
1742 17853 ch_res_ptr = vc->channel_residues + res_chan[j] * blocksize / 2;
1743 17853 vc->fdsp->vector_fmul(floor_ptr[j], floor_ptr[j], ch_res_ptr, blocksize / 2);
1744 17853 mdct_fn(mdct, ch_res_ptr, floor_ptr[j], sizeof(float));
1745 }
1746
1747 // Overlap/add, save data for next overlapping
1748
1749 9139 retlen = (blocksize + vc->blocksize[previous_window]) / 4;
1750
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 26992 for (j = 0; j < vc->audio_channels; j++) {
1751 17853 unsigned bs0 = vc->blocksize[0];
1752 17853 unsigned bs1 = vc->blocksize[1];
1753 17853 float *residue = vc->channel_residues + res_chan[j] * blocksize / 2;
1754 17853 float *saved = vc->saved + j * bs1 / 4;
1755 17853 float *ret = floor_ptr[j];
1756 17853 float *buf = residue;
1757 17853 const float *win = vc->win[blockflag & previous_window];
1758
1759
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 17853 if (blockflag == previous_window) {
1760 16416 vc->fdsp->vector_fmul_window(ret, saved, buf, win, blocksize / 4);
1761
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 1437 } else if (blockflag > previous_window) {
1762 739 vc->fdsp->vector_fmul_window(ret, saved, buf, win, bs0 / 4);
1763 739 memcpy(ret+bs0/2, buf+bs0/4, ((bs1-bs0)/4) * sizeof(float));
1764 } else {
1765 698 memcpy(ret, saved, ((bs1 - bs0) / 4) * sizeof(float));
1766 698 vc->fdsp->vector_fmul_window(ret + (bs1 - bs0) / 4, saved + (bs1 - bs0) / 4, buf, win, bs0 / 4);
1767 }
1768 17853 memcpy(saved, buf + blocksize / 4, blocksize / 4 * sizeof(float));
1769 }
1770
1771 9139 vc->previous_window = blockflag;
1772 9139 return retlen;
1773 }
1774
1775 // Return the decoded audio packet through the standard api
1776
1777 9139 static int vorbis_decode_frame(AVCodecContext *avctx, AVFrame *frame,
1778 int *got_frame_ptr, AVPacket *avpkt)
1779 {
1780 9139 const uint8_t *buf = avpkt->data;
1781 9139 int buf_size = avpkt->size;
1782 9139 vorbis_context *vc = avctx->priv_data;
1783 9139 GetBitContext *gb = &vc->gb;
1784 float *channel_ptrs[255];
1785 int i, len, ret;
1786
1787 ff_dlog(NULL, "packet length %d \n", buf_size);
1788
1789
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 9139 if (*buf == 1 && buf_size > 7) {
1790 ✗ if ((ret = init_get_bits8(gb, buf + 1, buf_size - 1)) < 0)
1791 ✗ return ret;
1792
1793 ✗ vorbis_free(vc);
1794 ✗ if ((ret = vorbis_parse_id_hdr(vc))) {
1795 ✗ av_log(avctx, AV_LOG_ERROR, "Id header corrupt.\n");
1796 ✗ vorbis_free(vc);
1797 ✗ return ret;
1798 }
1799
1800 ✗ av_channel_layout_uninit(&avctx->ch_layout);
1801 ✗ if (vc->audio_channels > 8) {
1802 ✗ avctx->ch_layout.order = AV_CHANNEL_ORDER_UNSPEC;
1803 ✗ avctx->ch_layout.nb_channels = vc->audio_channels;
1804 } else {
1805 ✗ av_channel_layout_copy(&avctx->ch_layout, &ff_vorbis_ch_layouts[vc->audio_channels - 1]);
1806 }
1807
1808 ✗ avctx->sample_rate = vc->audio_samplerate;
1809 ✗ return buf_size;
1810 }
1811
1812
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 9139 if (*buf == 3 && buf_size > 7) {
1813 ✗ av_log(avctx, AV_LOG_DEBUG, "Ignoring comment header\n");
1814 ✗ return buf_size;
1815 }
1816
1817
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 9139 if (*buf == 5 && buf_size > 7 && vc->channel_residues && !vc->modes) {
1818 ✗ if ((ret = init_get_bits8(gb, buf + 1, buf_size - 1)) < 0)
1819 ✗ return ret;
1820
1821 ✗ if ((ret = vorbis_parse_setup_hdr(vc))) {
1822 ✗ av_log(avctx, AV_LOG_ERROR, "Setup header corrupt.\n");
1823 ✗ vorbis_free(vc);
1824 ✗ return ret;
1825 }
1826 ✗ return buf_size;
1827 }
1828
1829
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 9139 if (!vc->channel_residues || !vc->modes) {
1830 ✗ av_log(avctx, AV_LOG_ERROR, "Data packet before valid headers\n");
1831 ✗ return AVERROR_INVALIDDATA;
1832 }
1833
1834 /* get output buffer */
1835 9139 frame->nb_samples = vc->blocksize[1] / 2;
1836
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 9139 if ((ret = ff_get_buffer(avctx, frame, 0)) < 0)
1837 ✗ return ret;
1838
1839
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 9139 if (vc->audio_channels > 8) {
1840 ✗ for (i = 0; i < vc->audio_channels; i++)
1841 ✗ channel_ptrs[i] = (float *)frame->extended_data[i];
1842 } else {
1843
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 26992 for (i = 0; i < vc->audio_channels; i++) {
1844 17853 int ch = ff_vorbis_channel_layout_offsets[vc->audio_channels - 1][i];
1845 17853 channel_ptrs[ch] = (float *)frame->extended_data[i];
1846 }
1847 }
1848
1849
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 9139 if ((ret = init_get_bits8(gb, buf, buf_size)) < 0)
1850 ✗ return ret;
1851
1852
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 9139 if ((len = vorbis_parse_audio_packet(vc, channel_ptrs)) <= 0)
1853 ✗ return len;
1854
1855
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 9139 if (!vc->first_frame) {
1856 61 vc->first_frame = 1;
1857 61 avctx->internal->skip_samples = len;
1858 }
1859
1860 ff_dlog(NULL, "parsed %d bytes %d bits, returned %d samples (*ch*bits) \n",
1861 get_bits_count(gb) / 8, get_bits_count(gb) % 8, len);
1862
1863 9139 frame->nb_samples = len;
1864 9139 *got_frame_ptr = 1;
1865
1866 9139 return buf_size;
1867 }
1868
1869 // Close decoder
1870
1871 71 static av_cold int vorbis_decode_close(AVCodecContext *avctx)
1872 {
1873 71 vorbis_context *vc = avctx->priv_data;
1874
1875 71 vorbis_free(vc);
1876
1877 71 return 0;
1878 }
1879
1880 ✗ static av_cold void vorbis_decode_flush(AVCodecContext *avctx)
1881 {
1882 ✗ vorbis_context *vc = avctx->priv_data;
1883
1884 ✗ if (vc->saved) {
1885 ✗ memset(vc->saved, 0, (vc->blocksize[1] / 4) * vc->audio_channels *
1886 sizeof(*vc->saved));
1887 }
1888 ✗ vc->previous_window = -1;
1889 ✗ vc->first_frame = 0;
1890 ✗ }
1891
1892 const FFCodec ff_vorbis_decoder = {
1893 .p.name = "vorbis",
1894 CODEC_LONG_NAME("Vorbis"),
1895 .p.type = AVMEDIA_TYPE_AUDIO,
1896 .p.id = AV_CODEC_ID_VORBIS,
1897 .priv_data_size = sizeof(vorbis_context),
1898 .init = vorbis_decode_init,
1899 .close = vorbis_decode_close,
1900 FF_CODEC_DECODE_CB(vorbis_decode_frame),
1901 .flush = vorbis_decode_flush,
1902 .p.capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_CHANNEL_CONF,
1903 .caps_internal = FF_CODEC_CAP_INIT_CLEANUP,
1904 };
1905