FFmpeg coverage


Directory: ../../../ffmpeg/
File: src/libavcodec/vorbisdec.c
Date: 2024-07-24 19:24:46
Exec Total Coverage
Lines: 712 912 78.1%
Functions: 20 21 95.2%
Branches: 402 584 68.8%

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 1800 static float vorbisfloat2float(unsigned val)
183 {
184 1800 float mant = val & 0x1fffff;
185 1800 int exp = (val & 0x7fe00000) >> 21;
186
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1800 if (val & 0x80000000)
187 832 mant = -mant;
188 1800 return ldexpf(mant, exp - 20 - 768);
189 }
190
191
192 // Free all allocated memory -----------------------------------------
193
194 66 static void vorbis_free(vorbis_context *vc)
195 {
196 int i;
197
198 66 av_freep(&vc->channel_residues);
199 66 av_freep(&vc->saved);
200 66 av_freep(&vc->fdsp);
201
202
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66 if (vc->residues)
203
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198 for (i = 0; i < vc->residue_count; i++)
204 132 av_freep(&vc->residues[i].classifs);
205 66 av_freep(&vc->residues);
206 66 av_freep(&vc->modes);
207
208 66 av_tx_uninit(&vc->mdct[0]);
209 66 av_tx_uninit(&vc->mdct[1]);
210
211
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66 if (vc->codebooks)
212
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2112 for (i = 0; i < vc->codebook_count; ++i) {
213 2046 av_freep(&vc->codebooks[i].codevectors);
214 2046 ff_vlc_free(&vc->codebooks[i].vlc);
215 }
216 66 av_freep(&vc->codebooks);
217
218
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66 if (vc->floors)
219
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198 for (i = 0; i < vc->floor_count; ++i) {
220
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132 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 88 av_freep(&vc->floors[i].data.t1.list);
227 }
228 }
229 66 av_freep(&vc->floors);
230
231
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66 if (vc->mappings)
232
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196 for (i = 0; i < vc->mapping_count; ++i) {
233 130 av_freep(&vc->mappings[i].magnitude);
234 130 av_freep(&vc->mappings[i].angle);
235 130 av_freep(&vc->mappings[i].mux);
236 }
237 66 av_freep(&vc->mappings);
238 66 }
239
240 // Parse setup header -------------------------------------------------
241
242 // Process codebooks part
243
244 66 static int vorbis_parse_setup_hdr_codebooks(vorbis_context *vc)
245 {
246 unsigned cb;
247 66 uint8_t *tmp_vlc_bits = NULL;
248 66 uint32_t *tmp_vlc_codes = NULL;
249 66 GetBitContext *gb = &vc->gb;
250 66 uint16_t *codebook_multiplicands = NULL;
251 66 int ret = 0;
252
253 66 vc->codebook_count = get_bits(gb, 8) + 1;
254
255 ff_dlog(NULL, " Codebooks: %d \n", vc->codebook_count);
256
257 66 vc->codebooks = av_mallocz(vc->codebook_count * sizeof(*vc->codebooks));
258 66 tmp_vlc_bits = av_mallocz(V_MAX_VLCS * sizeof(*tmp_vlc_bits));
259 66 tmp_vlc_codes = av_mallocz(V_MAX_VLCS * sizeof(*tmp_vlc_codes));
260 66 codebook_multiplicands = av_malloc(V_MAX_VLCS * sizeof(*codebook_multiplicands));
261
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66 if (!vc->codebooks ||
262
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66 !tmp_vlc_bits || !tmp_vlc_codes || !codebook_multiplicands) {
263 ret = AVERROR(ENOMEM);
264 goto error;
265 }
266
267
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2112 for (cb = 0; cb < vc->codebook_count; ++cb) {
268 2046 vorbis_codebook *codebook_setup = &vc->codebooks[cb];
269 2046 unsigned ordered, t, entries, used_entries = 0;
270
271 ff_dlog(NULL, " %u. Codebook\n", cb);
272
273
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2046 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 2046 codebook_setup->dimensions=get_bits(gb, 16);
281
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2046 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 2046 entries = get_bits(gb, 24);
289
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2046 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 2046 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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2046 if (!ordered) {
303 unsigned ce, flag;
304 2022 unsigned sparse = get_bits1(gb);
305
306 ff_dlog(NULL, " not ordered \n");
307
308
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2022 if (sparse) {
309 ff_dlog(NULL, " sparse \n");
310
311 826 used_entries = 0;
312
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288362 for (ce = 0; ce < entries; ++ce) {
313 287536 flag = get_bits1(gb);
314
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287536 if (flag) {
315 102466 tmp_vlc_bits[ce] = get_bits(gb, 5) + 1;
316 102466 ++used_entries;
317 } else
318 185070 tmp_vlc_bits[ce] = 0;
319 }
320 } else {
321 ff_dlog(NULL, " not sparse \n");
322
323 1196 used_entries = entries;
324
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300710 for (ce = 0; ce < entries; ++ce)
325 299514 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 2046 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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2046 if (codebook_setup->lookup_type == 1) {
364 unsigned i, j, k;
365 900 unsigned codebook_lookup_values = ff_vorbis_nth_root(entries, codebook_setup->dimensions);
366
367 900 float codebook_minimum_value = vorbisfloat2float(get_bits_long(gb, 32));
368 900 float codebook_delta_value = vorbisfloat2float(get_bits_long(gb, 32));
369 900 unsigned codebook_value_bits = get_bits(gb, 4) + 1;
370 900 unsigned codebook_sequence_p = get_bits1(gb);
371
372
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900 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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18132 for (i = 0; i < codebook_lookup_values; ++i) {
382 17232 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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900 if (used_entries) {
391 900 codebook_setup->codevectors =
392 900 av_calloc(used_entries, codebook_setup->dimensions *
393 sizeof(*codebook_setup->codevectors));
394
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900 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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493398 for (j = 0, i = 0; i < entries; ++i) {
402 492498 unsigned dim = codebook_setup->dimensions;
403
404
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492498 if (tmp_vlc_bits[i]) {
405 319750 float last = 0.0;
406 319750 unsigned lookup_offset = i;
407
408 ff_dlog(vc->avctx, "Lookup offset %u ,", i);
409
410
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1282943 for (k = 0; k < dim; ++k) {
411 963193 unsigned multiplicand_offset = lookup_offset % codebook_lookup_values;
412 963193 codebook_setup->codevectors[j * dim + k] = codebook_multiplicands[multiplicand_offset] * codebook_delta_value + codebook_minimum_value + last;
413
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963193 if (codebook_sequence_p)
414 257530 last = codebook_setup->codevectors[j * dim + k];
415 963193 lookup_offset/=codebook_lookup_values;
416 }
417 319750 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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1282943 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 319750 ++j;
426 }
427 }
428
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900 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 }
433 900 entries = used_entries;
434
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1146 } 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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2046 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 2046 codebook_setup->maxdepth = 0;
447
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417250 for (t = 0; t < entries; ++t)
448
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415204 if (tmp_vlc_bits[t] >= codebook_setup->maxdepth)
449 113542 codebook_setup->maxdepth = tmp_vlc_bits[t];
450
451
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2046 if (codebook_setup->maxdepth > 3 * V_NB_BITS)
452 codebook_setup->nb_bits = V_NB_BITS2;
453 else
454 2046 codebook_setup->nb_bits = V_NB_BITS;
455
456 2046 codebook_setup->maxdepth = (codebook_setup->maxdepth+codebook_setup->nb_bits - 1) / codebook_setup->nb_bits;
457
458
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2046 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 66 av_free(tmp_vlc_bits);
469 66 av_free(tmp_vlc_codes);
470 66 av_free(codebook_multiplicands);
471 66 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 66 static int vorbis_parse_setup_hdr_tdtransforms(vorbis_context *vc)
484 {
485 66 GetBitContext *gb = &vc->gb;
486 66 unsigned i, vorbis_time_count = get_bits(gb, 6) + 1;
487
488
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132 for (i = 0; i < vorbis_time_count; ++i) {
489 66 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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66 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 66 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 66 static int vorbis_parse_setup_hdr_floors(vorbis_context *vc)
510 {
511 66 GetBitContext *gb = &vc->gb;
512 int i, j, k, ret;
513
514 66 vc->floor_count = get_bits(gb, 6) + 1;
515
516 66 vc->floors = av_mallocz(vc->floor_count * sizeof(*vc->floors));
517
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66 if (!vc->floors)
518 return AVERROR(ENOMEM);
519
520
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198 for (i = 0; i < vc->floor_count; ++i) {
521 132 vorbis_floor *floor_setup = &vc->floors[i];
522
523 132 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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132 if (floor_setup->floor_type == 1) {
528 88 int maximum_class = -1;
529 88 unsigned rangebits, rangemax, floor1_values = 2;
530
531 88 floor_setup->decode = vorbis_floor1_decode;
532
533 88 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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590 for (j = 0; j < floor_setup->data.t1.partitions; ++j) {
539 502 floor_setup->data.t1.partition_class[j] = get_bits(gb, 4);
540
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502 if (floor_setup->data.t1.partition_class[j] > maximum_class)
541 318 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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406 for (j = 0; j <= maximum_class; ++j) {
551 318 floor_setup->data.t1.class_dimensions[j] = get_bits(gb, 3) + 1;
552 318 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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318 if (floor_setup->data.t1.class_subclasses[j]) {
559
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262 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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1222 for (k = 0; k < (1 << floor_setup->data.t1.class_subclasses[j]); ++k) {
565 904 int16_t bits = get_bits(gb, 8) - 1;
566
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904 if (bits != -1)
567
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752 VALIDATE_INDEX(bits, vc->codebook_count)
568 904 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 88 floor_setup->data.t1.multiplier = get_bits(gb, 2) + 1;
575 88 floor_setup->data.t1.x_list_dim = 2;
576
577
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590 for (j = 0; j < floor_setup->data.t1.partitions; ++j)
578 502 floor_setup->data.t1.x_list_dim+=floor_setup->data.t1.class_dimensions[floor_setup->data.t1.partition_class[j]];
579
580 88 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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88 if (!floor_setup->data.t1.list)
583 return AVERROR(ENOMEM);
584
585 88 rangebits = get_bits(gb, 4);
586
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88 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 88 rangemax = (1 << rangebits);
592
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88 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 88 floor_setup->data.t1.list[0].x = 0;
599 88 floor_setup->data.t1.list[1].x = rangemax;
600
601
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590 for (j = 0; j < floor_setup->data.t1.partitions; ++j) {
602
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2120 for (k = 0; k < floor_setup->data.t1.class_dimensions[floor_setup->data.t1.partition_class[j]]; ++k, ++floor1_values) {
603 1618 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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88 if (ff_vorbis_ready_floor1_list(vc->avctx,
612 floor_setup->data.t1.list,
613 88 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 66 return 0;
695 }
696
697 // Process residues part
698
699 66 static int vorbis_parse_setup_hdr_residues(vorbis_context *vc)
700 {
701 66 GetBitContext *gb = &vc->gb;
702 unsigned i, j, k;
703
704 66 vc->residue_count = get_bits(gb, 6)+1;
705 66 vc->residues = av_mallocz(vc->residue_count * sizeof(*vc->residues));
706
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66 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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198 for (i = 0; i < vc->residue_count; ++i) {
712 132 vorbis_residue *res_setup = &vc->residues[i];
713 uint8_t cascade[64];
714 unsigned high_bits, low_bits;
715
716 132 res_setup->type = get_bits(gb, 16);
717
718 ff_dlog(NULL, " %u. residue type %d\n", i, res_setup->type);
719
720 132 res_setup->begin = get_bits(gb, 24);
721 132 res_setup->end = get_bits(gb, 24);
722 132 res_setup->partition_size = get_bits(gb, 24) + 1;
723 /* Validations to prevent a buffer overflow later. */
724
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132 if (res_setup->begin>res_setup->end ||
725
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132 (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
733 132 res_setup->classifications = get_bits(gb, 6) + 1;
734
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132 GET_VALIDATED_INDEX(res_setup->classbook, 8, vc->codebook_count)
735
736 132 res_setup->ptns_to_read =
737 132 (res_setup->end - res_setup->begin) / res_setup->partition_size;
738 264 res_setup->classifs = av_malloc_array(res_setup->ptns_to_read,
739 132 vc->audio_channels *
740 sizeof(*res_setup->classifs));
741
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132 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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1276 for (j = 0; j < res_setup->classifications; ++j) {
749 1144 high_bits = 0;
750 1144 low_bits = get_bits(gb, 3);
751
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1144 if (get_bits1(gb))
752 4 high_bits = get_bits(gb, 5);
753 1144 cascade[j] = (high_bits << 3) + low_bits;
754
755 ff_dlog(NULL, " %u class cascade depth: %d\n", j, ilog(cascade[j]));
756 }
757
758 132 res_setup->maxpass = 0;
759
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1276 for (j = 0; j < res_setup->classifications; ++j) {
760
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10296 for (k = 0; k < 8; ++k) {
761
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9152 if (cascade[j]&(1 << k)) {
762
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1348 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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1348 if (k>res_setup->maxpass)
768 106 res_setup->maxpass = k;
769 } else {
770 7804 res_setup->books[j][k] = -1;
771 }
772 }
773 }
774 }
775 66 return 0;
776 }
777
778 // Process mappings part
779
780 66 static int vorbis_parse_setup_hdr_mappings(vorbis_context *vc)
781 {
782 66 GetBitContext *gb = &vc->gb;
783 unsigned i, j;
784
785 66 vc->mapping_count = get_bits(gb, 6)+1;
786 66 vc->mappings = av_mallocz(vc->mapping_count * sizeof(*vc->mappings));
787
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66 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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196 for (i = 0; i < vc->mapping_count; ++i) {
793 130 vorbis_mapping *mapping_setup = &vc->mappings[i];
794
795
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130 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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130 if (get_bits1(gb)) {
800 4 mapping_setup->submaps = get_bits(gb, 4) + 1;
801 } else {
802 126 mapping_setup->submaps = 1;
803 }
804
805
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130 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 80 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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130 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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130 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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264 for (j = 0; j < mapping_setup->submaps; ++j) {
846 134 skip_bits(gb, 8); // FIXME check?
847
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134 GET_VALIDATED_INDEX(mapping_setup->submap_floor[j], 8, vc->floor_count)
848
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134 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 66 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 66 static int vorbis_parse_setup_hdr_modes(vorbis_context *vc)
896 {
897 66 GetBitContext *gb = &vc->gb;
898 unsigned i;
899
900 66 vc->mode_count = get_bits(gb, 6) + 1;
901 66 vc->modes = av_mallocz(vc->mode_count * sizeof(*vc->modes));
902
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66 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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198 for (i = 0; i < vc->mode_count; ++i) {
908 132 vorbis_mode *mode_setup = &vc->modes[i];
909
910 132 mode_setup->blockflag = get_bits1(gb);
911 132 mode_setup->windowtype = get_bits(gb, 16); //FIXME check
912 132 mode_setup->transformtype = get_bits(gb, 16); //FIXME check
913
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132 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 66 return 0;
920 }
921
922 // Process the whole setup header using the functions above
923
924 66 static int vorbis_parse_setup_hdr(vorbis_context *vc)
925 {
926 66 GetBitContext *gb = &vc->gb;
927 int ret;
928
929
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132 if ((get_bits(gb, 8) != 'v') || (get_bits(gb, 8) != 'o') ||
930
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198 (get_bits(gb, 8) != 'r') || (get_bits(gb, 8) != 'b') ||
931
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132 (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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66 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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66 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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66 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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66 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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66 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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66 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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66 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 66 return 0;
966 }
967
968 // Process the identification header
969
970 66 static int vorbis_parse_id_hdr(vorbis_context *vc)
971 {
972 66 GetBitContext *gb = &vc->gb;
973 unsigned bl0, bl1;
974 66 float scale = -1.0;
975 int ret;
976
977
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132 if ((get_bits(gb, 8) != 'v') || (get_bits(gb, 8) != 'o') ||
978
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198 (get_bits(gb, 8) != 'r') || (get_bits(gb, 8) != 'b') ||
979
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132 (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 66 vc->version = get_bits_long(gb, 32); //FIXME check 0
985 66 vc->audio_channels = get_bits(gb, 8);
986
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66 if (vc->audio_channels <= 0) {
987 av_log(vc->avctx, AV_LOG_ERROR, "Invalid number of channels\n");
988 return AVERROR_INVALIDDATA;
989 }
990 66 vc->audio_samplerate = get_bits_long(gb, 32);
991
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66 if (vc->audio_samplerate <= 0) {
992 av_log(vc->avctx, AV_LOG_ERROR, "Invalid samplerate\n");
993 return AVERROR_INVALIDDATA;
994 }
995 66 vc->bitrate_maximum = get_bits_long(gb, 32);
996 66 vc->bitrate_nominal = get_bits_long(gb, 32);
997 66 vc->bitrate_minimum = get_bits_long(gb, 32);
998 66 bl0 = get_bits(gb, 4);
999 66 bl1 = get_bits(gb, 4);
1000
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66 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 66 vc->blocksize[0] = (1 << bl0);
1005 66 vc->blocksize[1] = (1 << bl1);
1006 66 vc->win[0] = ff_vorbis_vwin[bl0 - 6];
1007 66 vc->win[1] = ff_vorbis_vwin[bl1 - 6];
1008
1009
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66 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 66 vc->channel_residues = av_malloc_array(vc->blocksize[1] / 2, vc->audio_channels * sizeof(*vc->channel_residues));
1015 66 vc->saved = av_calloc(vc->blocksize[1] / 4, vc->audio_channels * sizeof(*vc->saved));
1016
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66 if (!vc->channel_residues || !vc->saved)
1017 return AVERROR(ENOMEM);
1018
1019 66 vc->previous_window = -1;
1020
1021 66 ret = av_tx_init(&vc->mdct[0], &vc->mdct_fn[0], AV_TX_FLOAT_MDCT, 1,
1022 66 vc->blocksize[0] >> 1, &scale, 0);
1023
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66 if (ret < 0)
1024 return ret;
1025
1026 66 ret = av_tx_init(&vc->mdct[1], &vc->mdct_fn[1], AV_TX_FLOAT_MDCT, 1,
1027 66 vc->blocksize[1] >> 1, &scale, 0);
1028
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66 if (ret < 0)
1029 return ret;
1030
1031 66 vc->fdsp = avpriv_float_dsp_alloc(vc->avctx->flags & AV_CODEC_FLAG_BITEXACT);
1032
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66 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 66 return 0;
1046 }
1047
1048 // Process the extradata using the functions above (identification header, setup header)
1049
1050 66 static av_cold int vorbis_decode_init(AVCodecContext *avctx)
1051 {
1052 66 vorbis_context *vc = avctx->priv_data;
1053 66 uint8_t *headers = avctx->extradata;
1054 66 int headers_len = avctx->extradata_size;
1055 const uint8_t *header_start[3];
1056 int header_len[3];
1057 66 GetBitContext *gb = &vc->gb;
1058 int hdr_type, ret;
1059
1060 66 vc->avctx = avctx;
1061 66 ff_vorbisdsp_init(&vc->dsp);
1062
1063 66 avctx->sample_fmt = AV_SAMPLE_FMT_FLTP;
1064
1065
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66 if (!headers_len) {
1066 av_log(avctx, AV_LOG_ERROR, "Extradata missing.\n");
1067 return AVERROR_INVALIDDATA;
1068 }
1069
1070
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66 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 66 init_get_bits(gb, header_start[0], header_len[0]*8);
1076 66 hdr_type = get_bits(gb, 8);
1077
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66 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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66 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 66 init_get_bits(gb, header_start[2], header_len[2]*8);
1088 66 hdr_type = get_bits(gb, 8);
1089
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66 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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66 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 66 av_channel_layout_uninit(&avctx->ch_layout);
1101
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66 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 66 av_channel_layout_copy(&avctx->ch_layout, &ff_vorbis_ch_layouts[vc->audio_channels - 1]);
1106 }
1107
1108 66 avctx->sample_rate = vc->audio_samplerate;
1109
1110 66 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, codebook.maxdepth);
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 11463 static int vorbis_floor1_decode(vorbis_context *vc,
1232 vorbis_floor_data *vfu, float *vec)
1233 {
1234 11463 vorbis_floor1 *vf = &vfu->t1;
1235 11463 GetBitContext *gb = &vc->gb;
1236 11463 uint16_t range_v[4] = { 256, 128, 86, 64 };
1237 11463 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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11463 if (!get_bits1(gb)) // silence
1246 2001 return 1;
1247
1248 // Read values (or differences) for the floor's points
1249
1250 9462 floor1_Y[0] = get_bits(gb, ilog(range - 1));
1251 9462 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 9462 offset = 2;
1256
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78249 for (i = 0; i < vf->partitions; ++i) {
1257 68787 partition_class = vf->partition_class[i];
1258 68787 cdim = vf->class_dimensions[partition_class];
1259 68787 cbits = vf->class_subclasses[partition_class];
1260 68787 csub = (1 << cbits) - 1;
1261 68787 cval = 0;
1262
1263 ff_dlog(NULL, "Cbits %u\n", cbits);
1264
1265
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68787 if (cbits) // this reads all subclasses for this partition's class
1266 62865 cval = get_vlc2(gb, vc->codebooks[vf->class_masterbook[partition_class]].vlc.table,
1267 62865 vc->codebooks[vf->class_masterbook[partition_class]].nb_bits, 3);
1268
1269
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285217 for (j = 0; j < cdim; ++j) {
1270 216430 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 216430 cval = cval >> cbits;
1276
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216430 if (book > -1) {
1277 113935 int v = get_vlc2(gb, vc->codebooks[book].vlc.table,
1278 113935 vc->codebooks[book].nb_bits, 3);
1279
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113935 if (v < 0)
1280 return AVERROR_INVALIDDATA;
1281 113935 floor1_Y[offset+j] = v;
1282 } else {
1283 102495 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 68787 offset+=cdim;
1290 }
1291
1292 // Amplitude calculation from the differences
1293
1294 9462 floor1_flag[0] = 1;
1295 9462 floor1_flag[1] = 1;
1296 9462 floor1_Y_final[0] = floor1_Y[0];
1297 9462 floor1_Y_final[1] = floor1_Y[1];
1298
1299
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225892 for (i = 2; i < vf->x_list_dim; ++i) {
1300 unsigned val, highroom, lowroom, room, high_neigh_offs, low_neigh_offs;
1301
1302 216430 low_neigh_offs = vf->list[i].low;
1303 216430 high_neigh_offs = vf->list[i].high;
1304 216430 dy = floor1_Y_final[high_neigh_offs] - floor1_Y_final[low_neigh_offs]; // render_point begin
1305 216430 adx = vf->list[high_neigh_offs].x - vf->list[low_neigh_offs].x;
1306 216430 ady = FFABS(dy);
1307 216430 err = ady * (vf->list[i].x - vf->list[low_neigh_offs].x);
1308 216430 off = err / adx;
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216430 if (dy < 0) {
1310 119510 predicted = floor1_Y_final[low_neigh_offs] - off;
1311 } else {
1312 96920 predicted = floor1_Y_final[low_neigh_offs] + off;
1313 } // render_point end
1314
1315 216430 val = floor1_Y[i];
1316 216430 highroom = range-predicted;
1317 216430 lowroom = predicted;
1318
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216430 if (highroom < lowroom) {
1319 87980 room = highroom * 2;
1320 } else {
1321 128450 room = lowroom * 2; // SPEC misspelling
1322 }
1323
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216430 if (val) {
1324 98022 floor1_flag[low_neigh_offs] = 1;
1325 98022 floor1_flag[high_neigh_offs] = 1;
1326 98022 floor1_flag[i] = 1;
1327
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98022 if (val >= room) {
1328
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108 if (highroom > lowroom) {
1329 80 floor1_Y_final[i] = av_clip_uint16(val - lowroom + predicted);
1330 } else {
1331 28 floor1_Y_final[i] = av_clip_uint16(predicted - val + highroom - 1);
1332 }
1333 } else {
1334
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97914 if (val & 1) {
1335 63543 floor1_Y_final[i] = av_clip_uint16(predicted - (val + 1) / 2);
1336 } else {
1337 34371 floor1_Y_final[i] = av_clip_uint16(predicted + val / 2);
1338 }
1339 }
1340 } else {
1341 118408 floor1_flag[i] = 0;
1342 118408 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 9462 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 9462 return 0;
1356 }
1357
1358 134567 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 134567 vorbis_codebook *codebook = vc->codebooks + vr->classbook;
1367 int p, j, i;
1368 134567 unsigned c_p_c = codebook->dimensions;
1369 134567 unsigned inverse_class = ff_inverse[vr->classifications];
1370 int temp, temp2;
1371
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298387 for (p = 0, j = 0; j < ch_used; ++j) {
1372
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163820 if (!do_not_decode[j]) {
1373 162499 temp = get_vlc2(&vc->gb, codebook->vlc.table,
1374 162499 codebook->nb_bits, 3);
1375
1376 ff_dlog(NULL, "Classword: %u\n", temp);
1377
1378
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162499 av_assert0(temp < 65536);
1379
1380
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162499 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
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162499 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
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506614 for (i = partition_count + c_p_c - 1; i >= partition_count; i--) {
1393 344115 temp2 = (((uint64_t)temp) * inverse_class) >> 32;
1394
1395
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344115 if (i < ptns_to_read)
1396 343899 vr->classifs[p + i] = temp - temp2 * vr->classifications;
1397 344115 temp = temp2;
1398 }
1399 }
1400 }
1401 163820 p += ptns_to_read;
1402 }
1403 134567 return 0;
1404 }
1405 // Read and decode residue
1406
1407 9495 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 9495 GetBitContext *gb = &vc->gb;
1417 9495 unsigned c_p_c = vc->codebooks[vr->classbook].dimensions;
1418 9495 uint8_t *classifs = vr->classifs;
1419 unsigned pass, ch_used, i, j, k, l;
1420 9495 unsigned max_output = (ch - 1) * vlen;
1421 9495 int ptns_to_read = vr->ptns_to_read;
1422 9495 int libvorbis_bug = 0;
1423
1424
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9495 if (vr_type == 2) {
1425
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9663 for (j = 1; j < ch; ++j)
1426 5388 do_not_decode[0] &= do_not_decode[j]; // FIXME - clobbering input
1427
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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 5220 ch_used = ch;
1433 5220 max_output += vr->end;
1434 }
1435
1436
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9375 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
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30979 for (pass = 0; pass <= vr->maxpass; ++pass) { // FIXME OPTIMIZE?
1449 int voffset, partition_count, j_times_ptns_to_read;
1450
1451 21604 voffset = vr->begin;
1452
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371294 for (partition_count = 0; partition_count < ptns_to_read;) { // SPEC error
1453
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349690 if (!pass) {
1454 134567 int ret = setup_classifs(vc, vr, do_not_decode, ch_used, partition_count, ptns_to_read);
1455
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134567 if (ret < 0)
1456 return ret;
1457 }
1458
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1084647 for (i = 0; (i < c_p_c) && (partition_count < ptns_to_read); ++i) {
1459
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1532452 for (j_times_ptns_to_read = 0, j = 0; j < ch_used; ++j) {
1460 unsigned voffs;
1461
1462
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797495 if (!do_not_decode[j]) {
1463 793479 unsigned vqclass = classifs[j_times_ptns_to_read + partition_count];
1464 793479 int vqbook = vr->books[vqclass][pass];
1465
1466
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793479 if (vqbook >= 0 && vc->codebooks[vqbook].codevectors) {
1467 int coffs;
1468 321723 unsigned dim = vc->codebooks[vqbook].dimensions;
1469 321723 unsigned step = FASTDIV(vr->partition_size << 1, dim << 1);
1470 321723 vorbis_codebook codebook = vc->codebooks[vqbook];
1471
1472
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321723 if (get_bits_left(gb) <= 0)
1473 return AVERROR_INVALIDDATA;
1474
1475
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321723 if (vr_type == 0) {
1476
1477 115082 voffs = voffset+j*vlen;
1478
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1357906 for (k = 0; k < step; ++k) {
1479 1242824 coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3);
1480
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1242824 if (coffs < 0)
1481 return coffs;
1482 1242824 coffs *= dim;
1483
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4778728 for (l = 0; l < dim; ++l)
1484 3535904 vec[voffs + k + l * step] += codebook.codevectors[coffs + l];
1485 }
1486
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206641 } else if (vr_type == 1) {
1487 27682 voffs = voffset + j * vlen;
1488
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313912 for (k = 0; k < step; ++k) {
1489 286230 coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3);
1490
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286230 if (coffs < 0)
1491 return coffs;
1492 286230 coffs *= dim;
1493
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1075098 for (l = 0; l < dim; ++l, ++voffs) {
1494 788868 vec[voffs]+=codebook.codevectors[coffs+l];
1495
1496 ff_dlog(NULL, " pass %d offs: %d curr: %f change: %f cv offs.: %d \n",
1497 pass, voffs, vec[voffs], codebook.codevectors[coffs+l], coffs);
1498 }
1499 }
1500
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178959 } else if (vr_type == 2 && ch == 2 && (voffset & 1) == 0 && (dim & 1) == 0) { // most frequent case optimized
1501 151234 voffs = voffset >> 1;
1502
1503
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151234 if (dim == 2) {
1504
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1069084 for (k = 0; k < step; ++k) {
1505 1004556 coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3);
1506
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1004556 if (coffs < 0)
1507 return coffs;
1508 1004556 coffs *= 2;
1509 1004556 vec[voffs + k ] += codebook.codevectors[coffs ];
1510 1004556 vec[voffs + k + vlen] += codebook.codevectors[coffs + 1];
1511 }
1512
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86706 } else if (dim == 4) {
1513
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510176 for (k = 0; k < step; ++k, voffs += 2) {
1514 447102 coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3);
1515
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447102 if (coffs < 0)
1516 return coffs;
1517 447102 coffs *= 4;
1518 447102 vec[voffs ] += codebook.codevectors[coffs ];
1519 447102 vec[voffs + 1 ] += codebook.codevectors[coffs + 2];
1520 447102 vec[voffs + vlen ] += codebook.codevectors[coffs + 1];
1521 447102 vec[voffs + vlen + 1] += codebook.codevectors[coffs + 3];
1522 }
1523 } else
1524
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117798 for (k = 0; k < step; ++k) {
1525 94166 coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3);
1526
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94166 if (coffs < 0)
1527 return coffs;
1528 94166 coffs *= dim;
1529
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470830 for (l = 0; l < dim; l += 2, voffs++) {
1530 376664 vec[voffs ] += codebook.codevectors[coffs + l ];
1531 376664 vec[voffs + vlen] += codebook.codevectors[coffs + l + 1];
1532
1533 ff_dlog(NULL, " pass %d offs: %d curr: %f change: %f cv offs.: %d+%d \n",
1534 pass, voffset / ch + (voffs % ch) * vlen,
1535 vec[voffset / ch + (voffs % ch) * vlen],
1536 codebook.codevectors[coffs + l], coffs, l);
1537 }
1538 }
1539
1540
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27725 } else if (vr_type == 2) {
1541
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27725 unsigned voffs_div = ch == 1 ? voffset : FASTDIV(voffset, ch);
1542 27725 unsigned voffs_mod = voffset - voffs_div * ch;
1543
1544
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191834 for (k = 0; k < step; ++k) {
1545 164109 coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3);
1546
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164109 if (coffs < 0)
1547 return coffs;
1548 164109 coffs *= dim;
1549
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912594 for (l = 0; l < dim; ++l) {
1550 748485 vec[voffs_div + voffs_mod * vlen] +=
1551 748485 codebook.codevectors[coffs + l];
1552
1553 ff_dlog(NULL, " pass %d offs: %d curr: %f change: %f cv offs.: %d+%d \n",
1554 pass, voffs_div + voffs_mod * vlen,
1555 vec[voffs_div + voffs_mod * vlen],
1556 codebook.codevectors[coffs + l], coffs, l);
1557
1558
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748485 if (++voffs_mod == ch) {
1559 149697 voffs_div++;
1560 149697 voffs_mod = 0;
1561 }
1562 }
1563 }
1564 }
1565 }
1566 }
1567 797495 j_times_ptns_to_read += ptns_to_read;
1568 }
1569 734957 ++partition_count;
1570 734957 voffset += vr->partition_size;
1571 }
1572 }
1573
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21604 if (libvorbis_bug && !pass) {
1574 for (j = 0; j < ch_used; ++j) {
1575 if (!do_not_decode[j]) {
1576 get_vlc2(&vc->gb, vc->codebooks[vr->classbook].vlc.table,
1577 vc->codebooks[vr->classbook].nb_bits, 3);
1578 }
1579 }
1580 }
1581 }
1582 9375 return 0;
1583 }
1584
1585 9495 static inline int vorbis_residue_decode(vorbis_context *vc, vorbis_residue *vr,
1586 unsigned ch,
1587 uint8_t *do_not_decode,
1588 float *vec, unsigned vlen,
1589 unsigned ch_left)
1590 {
1591
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9495 if (vr->type == 2)
1592 4275 return vorbis_residue_decode_internal(vc, vr, ch, do_not_decode, vec, vlen, ch_left, 2);
1593
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5220 else if (vr->type == 1)
1594 1800 return vorbis_residue_decode_internal(vc, vr, ch, do_not_decode, vec, vlen, ch_left, 1);
1595
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✗ Branch 1 not taken.
3420 else if (vr->type == 0)
1596 3420 return vorbis_residue_decode_internal(vc, vr, ch, do_not_decode, vec, vlen, ch_left, 0);
1597 else {
1598 av_log(vc->avctx, AV_LOG_ERROR, " Invalid residue type while residue decode?! \n");
1599 return AVERROR_INVALIDDATA;
1600 }
1601 }
1602
1603 // Decode the audio packet using the functions above
1604
1605 9124 static int vorbis_parse_audio_packet(vorbis_context *vc, float **floor_ptr)
1606 {
1607 9124 GetBitContext *gb = &vc->gb;
1608 AVTXContext *mdct;
1609 av_tx_fn mdct_fn;
1610 9124 int previous_window = vc->previous_window;
1611 unsigned mode_number, blockflag, blocksize;
1612 int i, j;
1613 uint8_t no_residue[255];
1614 uint8_t do_not_decode[255];
1615 vorbis_mapping *mapping;
1616 9124 float *ch_res_ptr = vc->channel_residues;
1617 uint8_t res_chan[255];
1618 9124 unsigned res_num = 0;
1619 9124 int retlen = 0;
1620 9124 unsigned ch_left = vc->audio_channels;
1621 unsigned vlen;
1622
1623
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9124 if (get_bits1(gb)) {
1624 av_log(vc->avctx, AV_LOG_ERROR, "Not a Vorbis I audio packet.\n");
1625 return AVERROR_INVALIDDATA; // packet type not audio
1626 }
1627
1628
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9124 if (vc->mode_count == 1) {
1629 mode_number = 0;
1630 } else {
1631
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9124 GET_VALIDATED_INDEX(mode_number, ilog(vc->mode_count-1), vc->mode_count)
1632 }
1633 9124 vc->mode_number = mode_number;
1634 9124 mapping = &vc->mappings[vc->modes[mode_number].mapping];
1635
1636 ff_dlog(NULL, " Mode number: %u , mapping: %d , blocktype %d\n", mode_number,
1637 vc->modes[mode_number].mapping, vc->modes[mode_number].blockflag);
1638
1639 9124 blockflag = vc->modes[mode_number].blockflag;
1640 9124 blocksize = vc->blocksize[blockflag];
1641 9124 vlen = blocksize / 2;
1642
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9124 if (blockflag) {
1643 5975 int code = get_bits(gb, 2);
1644
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5975 if (previous_window < 0)
1645 3 previous_window = code>>1;
1646
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3149 } else if (previous_window < 0)
1647 53 previous_window = 0;
1648
1649 9124 memset(ch_res_ptr, 0, sizeof(float) * vc->audio_channels * vlen); //FIXME can this be removed ?
1650
2/2
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26962 for (i = 0; i < vc->audio_channels; ++i)
1651 17838 memset(floor_ptr[i], 0, vlen * sizeof(floor_ptr[0][0])); //FIXME can this be removed ?
1652
1653 // Decode floor
1654
1655
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26962 for (i = 0; i < vc->audio_channels; ++i) {
1656 vorbis_floor *floor;
1657 int ret;
1658
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17838 if (mapping->submaps > 1) {
1659 2226 floor = &vc->floors[mapping->submap_floor[mapping->mux[i]]];
1660 } else {
1661 15612 floor = &vc->floors[mapping->submap_floor[0]];
1662 }
1663
1664 17838 ret = floor->decode(vc, &floor->data, floor_ptr[i]);
1665
1666
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17838 if (ret < 0) {
1667 av_log(vc->avctx, AV_LOG_ERROR, "Invalid codebook in vorbis_floor_decode.\n");
1668 return AVERROR_INVALIDDATA;
1669 }
1670 17838 no_residue[i] = ret;
1671 }
1672
1673 // Nonzero vector propagate
1674
1675
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14512 for (i = mapping->coupling_steps - 1; i >= 0; --i) {
1676
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5388 if (!(no_residue[mapping->magnitude[i]] & no_residue[mapping->angle[i]])) {
1677 4732 no_residue[mapping->magnitude[i]] = 0;
1678 4732 no_residue[mapping->angle[i]] = 0;
1679 }
1680 }
1681
1682 // Decode residue
1683
1684
2/2
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18619 for (i = 0; i < mapping->submaps; ++i) {
1685 vorbis_residue *residue;
1686 9495 unsigned ch = 0;
1687 int ret;
1688
1689
2/2
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29559 for (j = 0; j < vc->audio_channels; ++j) {
1690
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20064 if ((mapping->submaps == 1) || (i == mapping->mux[j])) {
1691 17838 res_chan[j] = res_num;
1692
2/2
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17838 if (no_residue[j]) {
1693 1226 do_not_decode[ch] = 1;
1694 } else {
1695 16612 do_not_decode[ch] = 0;
1696 }
1697 17838 ++ch;
1698 17838 ++res_num;
1699 }
1700 }
1701 9495 residue = &vc->residues[mapping->submap_residue[i]];
1702
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9495 if (ch_left < ch) {
1703 av_log(vc->avctx, AV_LOG_ERROR, "Too many channels in vorbis_floor_decode.\n");
1704 return AVERROR_INVALIDDATA;
1705 }
1706
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9495 if (ch) {
1707 9495 ret = vorbis_residue_decode(vc, residue, ch, do_not_decode, ch_res_ptr, vlen, ch_left);
1708
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9495 if (ret < 0)
1709 return ret;
1710 }
1711
1712 9495 ch_res_ptr += ch * vlen;
1713 9495 ch_left -= ch;
1714 }
1715
1716
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9124 if (ch_left > 0)
1717 return AVERROR_INVALIDDATA;
1718
1719 // Inverse coupling
1720
1721
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14512 for (i = mapping->coupling_steps - 1; i >= 0; --i) { //warning: i has to be signed
1722 float *mag, *ang;
1723
1724 5388 mag = vc->channel_residues+res_chan[mapping->magnitude[i]] * blocksize / 2;
1725 5388 ang = vc->channel_residues+res_chan[mapping->angle[i]] * blocksize / 2;
1726 5388 vc->dsp.vorbis_inverse_coupling(mag, ang, blocksize / 2);
1727 }
1728
1729 // Dotproduct, MDCT
1730
1731 9124 mdct = vc->mdct[blockflag];
1732 9124 mdct_fn = vc->mdct_fn[blockflag];
1733
1734
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26962 for (j = vc->audio_channels-1;j >= 0; j--) {
1735 17838 ch_res_ptr = vc->channel_residues + res_chan[j] * blocksize / 2;
1736 17838 vc->fdsp->vector_fmul(floor_ptr[j], floor_ptr[j], ch_res_ptr, blocksize / 2);
1737 17838 mdct_fn(mdct, ch_res_ptr, floor_ptr[j], sizeof(float));
1738 }
1739
1740 // Overlap/add, save data for next overlapping
1741
1742 9124 retlen = (blocksize + vc->blocksize[previous_window]) / 4;
1743
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26962 for (j = 0; j < vc->audio_channels; j++) {
1744 17838 unsigned bs0 = vc->blocksize[0];
1745 17838 unsigned bs1 = vc->blocksize[1];
1746 17838 float *residue = vc->channel_residues + res_chan[j] * blocksize / 2;
1747 17838 float *saved = vc->saved + j * bs1 / 4;
1748 17838 float *ret = floor_ptr[j];
1749 17838 float *buf = residue;
1750 17838 const float *win = vc->win[blockflag & previous_window];
1751
1752
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17838 if (blockflag == previous_window) {
1753 16407 vc->fdsp->vector_fmul_window(ret, saved, buf, win, blocksize / 4);
1754
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1431 } else if (blockflag > previous_window) {
1755 735 vc->fdsp->vector_fmul_window(ret, saved, buf, win, bs0 / 4);
1756 735 memcpy(ret+bs0/2, buf+bs0/4, ((bs1-bs0)/4) * sizeof(float));
1757 } else {
1758 696 memcpy(ret, saved, ((bs1 - bs0) / 4) * sizeof(float));
1759 696 vc->fdsp->vector_fmul_window(ret + (bs1 - bs0) / 4, saved + (bs1 - bs0) / 4, buf, win, bs0 / 4);
1760 }
1761 17838 memcpy(saved, buf + blocksize / 4, blocksize / 4 * sizeof(float));
1762 }
1763
1764 9124 vc->previous_window = blockflag;
1765 9124 return retlen;
1766 }
1767
1768 // Return the decoded audio packet through the standard api
1769
1770 9124 static int vorbis_decode_frame(AVCodecContext *avctx, AVFrame *frame,
1771 int *got_frame_ptr, AVPacket *avpkt)
1772 {
1773 9124 const uint8_t *buf = avpkt->data;
1774 9124 int buf_size = avpkt->size;
1775 9124 vorbis_context *vc = avctx->priv_data;
1776 9124 GetBitContext *gb = &vc->gb;
1777 float *channel_ptrs[255];
1778 int i, len, ret;
1779
1780 ff_dlog(NULL, "packet length %d \n", buf_size);
1781
1782
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9124 if (*buf == 1 && buf_size > 7) {
1783 if ((ret = init_get_bits8(gb, buf + 1, buf_size - 1)) < 0)
1784 return ret;
1785
1786 vorbis_free(vc);
1787 if ((ret = vorbis_parse_id_hdr(vc))) {
1788 av_log(avctx, AV_LOG_ERROR, "Id header corrupt.\n");
1789 vorbis_free(vc);
1790 return ret;
1791 }
1792
1793 av_channel_layout_uninit(&avctx->ch_layout);
1794 if (vc->audio_channels > 8) {
1795 avctx->ch_layout.order = AV_CHANNEL_ORDER_UNSPEC;
1796 avctx->ch_layout.nb_channels = vc->audio_channels;
1797 } else {
1798 av_channel_layout_copy(&avctx->ch_layout, &ff_vorbis_ch_layouts[vc->audio_channels - 1]);
1799 }
1800
1801 avctx->sample_rate = vc->audio_samplerate;
1802 return buf_size;
1803 }
1804
1805
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9124 if (*buf == 3 && buf_size > 7) {
1806 av_log(avctx, AV_LOG_DEBUG, "Ignoring comment header\n");
1807 return buf_size;
1808 }
1809
1810
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9124 if (*buf == 5 && buf_size > 7 && vc->channel_residues && !vc->modes) {
1811 if ((ret = init_get_bits8(gb, buf + 1, buf_size - 1)) < 0)
1812 return ret;
1813
1814 if ((ret = vorbis_parse_setup_hdr(vc))) {
1815 av_log(avctx, AV_LOG_ERROR, "Setup header corrupt.\n");
1816 vorbis_free(vc);
1817 return ret;
1818 }
1819 return buf_size;
1820 }
1821
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9124 if (!vc->channel_residues || !vc->modes) {
1823 av_log(avctx, AV_LOG_ERROR, "Data packet before valid headers\n");
1824 return AVERROR_INVALIDDATA;
1825 }
1826
1827 /* get output buffer */
1828 9124 frame->nb_samples = vc->blocksize[1] / 2;
1829
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9124 if ((ret = ff_get_buffer(avctx, frame, 0)) < 0)
1830 return ret;
1831
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9124 if (vc->audio_channels > 8) {
1833 for (i = 0; i < vc->audio_channels; i++)
1834 channel_ptrs[i] = (float *)frame->extended_data[i];
1835 } else {
1836
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26962 for (i = 0; i < vc->audio_channels; i++) {
1837 17838 int ch = ff_vorbis_channel_layout_offsets[vc->audio_channels - 1][i];
1838 17838 channel_ptrs[ch] = (float *)frame->extended_data[i];
1839 }
1840 }
1841
1842
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9124 if ((ret = init_get_bits8(gb, buf, buf_size)) < 0)
1843 return ret;
1844
1845
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9124 if ((len = vorbis_parse_audio_packet(vc, channel_ptrs)) <= 0)
1846 return len;
1847
1848
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9124 if (!vc->first_frame) {
1849 56 vc->first_frame = 1;
1850 56 avctx->internal->skip_samples = len;
1851 }
1852
1853 ff_dlog(NULL, "parsed %d bytes %d bits, returned %d samples (*ch*bits) \n",
1854 get_bits_count(gb) / 8, get_bits_count(gb) % 8, len);
1855
1856 9124 frame->nb_samples = len;
1857 9124 *got_frame_ptr = 1;
1858
1859 9124 return buf_size;
1860 }
1861
1862 // Close decoder
1863
1864 66 static av_cold int vorbis_decode_close(AVCodecContext *avctx)
1865 {
1866 66 vorbis_context *vc = avctx->priv_data;
1867
1868 66 vorbis_free(vc);
1869
1870 66 return 0;
1871 }
1872
1873 static av_cold void vorbis_decode_flush(AVCodecContext *avctx)
1874 {
1875 vorbis_context *vc = avctx->priv_data;
1876
1877 if (vc->saved) {
1878 memset(vc->saved, 0, (vc->blocksize[1] / 4) * vc->audio_channels *
1879 sizeof(*vc->saved));
1880 }
1881 vc->previous_window = -1;
1882 vc->first_frame = 0;
1883 }
1884
1885 const FFCodec ff_vorbis_decoder = {
1886 .p.name = "vorbis",
1887 CODEC_LONG_NAME("Vorbis"),
1888 .p.type = AVMEDIA_TYPE_AUDIO,
1889 .p.id = AV_CODEC_ID_VORBIS,
1890 .priv_data_size = sizeof(vorbis_context),
1891 .init = vorbis_decode_init,
1892 .close = vorbis_decode_close,
1893 FF_CODEC_DECODE_CB(vorbis_decode_frame),
1894 .flush = vorbis_decode_flush,
1895 .p.capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_CHANNEL_CONF,
1896 .caps_internal = FF_CODEC_CAP_INIT_CLEANUP,
1897 .p.ch_layouts = ff_vorbis_ch_layouts,
1898 .p.sample_fmts = (const enum AVSampleFormat[]) { AV_SAMPLE_FMT_FLTP,
1899 AV_SAMPLE_FMT_NONE },
1900 };
1901