00001
00002
00003
00004
00005
00006
00007
00008
00009
00010
00011
00012
00013
00014
00015
00016
00017
00018
00025 #include <inttypes.h>
00026 #include <math.h>
00027
00028 #define BITSTREAM_READER_LE
00029 #include "avcodec.h"
00030 #include "get_bits.h"
00031 #include "dsputil.h"
00032 #include "fft.h"
00033 #include "fmtconvert.h"
00034
00035 #include "vorbis.h"
00036 #include "xiph.h"
00037
00038 #define V_NB_BITS 8
00039 #define V_NB_BITS2 11
00040 #define V_MAX_VLCS (1 << 16)
00041 #define V_MAX_PARTITIONS (1 << 20)
00042
00043 #undef NDEBUG
00044 #include <assert.h>
00045
00046 typedef struct {
00047 uint8_t dimensions;
00048 uint8_t lookup_type;
00049 uint8_t maxdepth;
00050 VLC vlc;
00051 float *codevectors;
00052 unsigned int nb_bits;
00053 } vorbis_codebook;
00054
00055 typedef union vorbis_floor_u vorbis_floor_data;
00056 typedef struct vorbis_floor0_s vorbis_floor0;
00057 typedef struct vorbis_floor1_s vorbis_floor1;
00058 struct vorbis_context_s;
00059 typedef
00060 int (* vorbis_floor_decode_func)
00061 (struct vorbis_context_s *, vorbis_floor_data *, float *);
00062 typedef struct {
00063 uint8_t floor_type;
00064 vorbis_floor_decode_func decode;
00065 union vorbis_floor_u {
00066 struct vorbis_floor0_s {
00067 uint8_t order;
00068 uint16_t rate;
00069 uint16_t bark_map_size;
00070 int32_t *map[2];
00071 uint32_t map_size[2];
00072 uint8_t amplitude_bits;
00073 uint8_t amplitude_offset;
00074 uint8_t num_books;
00075 uint8_t *book_list;
00076 float *lsp;
00077 } t0;
00078 struct vorbis_floor1_s {
00079 uint8_t partitions;
00080 uint8_t partition_class[32];
00081 uint8_t class_dimensions[16];
00082 uint8_t class_subclasses[16];
00083 uint8_t class_masterbook[16];
00084 int16_t subclass_books[16][8];
00085 uint8_t multiplier;
00086 uint16_t x_list_dim;
00087 vorbis_floor1_entry *list;
00088 } t1;
00089 } data;
00090 } vorbis_floor;
00091
00092 typedef struct {
00093 uint16_t type;
00094 uint32_t begin;
00095 uint32_t end;
00096 unsigned partition_size;
00097 uint8_t classifications;
00098 uint8_t classbook;
00099 int16_t books[64][8];
00100 uint8_t maxpass;
00101 uint16_t ptns_to_read;
00102 uint8_t *classifs;
00103 } vorbis_residue;
00104
00105 typedef struct {
00106 uint8_t submaps;
00107 uint16_t coupling_steps;
00108 uint8_t *magnitude;
00109 uint8_t *angle;
00110 uint8_t *mux;
00111 uint8_t submap_floor[16];
00112 uint8_t submap_residue[16];
00113 } vorbis_mapping;
00114
00115 typedef struct {
00116 uint8_t blockflag;
00117 uint16_t windowtype;
00118 uint16_t transformtype;
00119 uint8_t mapping;
00120 } vorbis_mode;
00121
00122 typedef struct vorbis_context_s {
00123 AVCodecContext *avccontext;
00124 AVFrame frame;
00125 GetBitContext gb;
00126 DSPContext dsp;
00127 FmtConvertContext fmt_conv;
00128
00129 FFTContext mdct[2];
00130 uint8_t first_frame;
00131 uint32_t version;
00132 uint8_t audio_channels;
00133 uint32_t audio_samplerate;
00134 uint32_t bitrate_maximum;
00135 uint32_t bitrate_nominal;
00136 uint32_t bitrate_minimum;
00137 uint32_t blocksize[2];
00138 const float *win[2];
00139 uint16_t codebook_count;
00140 vorbis_codebook *codebooks;
00141 uint8_t floor_count;
00142 vorbis_floor *floors;
00143 uint8_t residue_count;
00144 vorbis_residue *residues;
00145 uint8_t mapping_count;
00146 vorbis_mapping *mappings;
00147 uint8_t mode_count;
00148 vorbis_mode *modes;
00149 uint8_t mode_number;
00150 uint8_t previous_window;
00151 float *channel_residues;
00152 float *channel_floors;
00153 float *saved;
00154 float scale_bias;
00155 } vorbis_context;
00156
00157
00158
00159 #define BARK(x) \
00160 (13.1f * atan(0.00074f * (x)) + 2.24f * atan(1.85e-8f * (x) * (x)) + 1e-4f * (x))
00161
00162 static const char idx_err_str[] = "Index value %d out of range (0 - %d) for %s at %s:%i\n";
00163 #define VALIDATE_INDEX(idx, limit) \
00164 if (idx >= limit) {\
00165 av_log(vc->avccontext, AV_LOG_ERROR,\
00166 idx_err_str,\
00167 (int)(idx), (int)(limit - 1), #idx, __FILE__, __LINE__);\
00168 return AVERROR_INVALIDDATA;\
00169 }
00170 #define GET_VALIDATED_INDEX(idx, bits, limit) \
00171 {\
00172 idx = get_bits(gb, bits);\
00173 VALIDATE_INDEX(idx, limit)\
00174 }
00175
00176 static float vorbisfloat2float(unsigned val)
00177 {
00178 double mant = val & 0x1fffff;
00179 long exp = (val & 0x7fe00000L) >> 21;
00180 if (val & 0x80000000)
00181 mant = -mant;
00182 return ldexp(mant, exp - 20 - 768);
00183 }
00184
00185
00186
00187
00188 static void vorbis_free(vorbis_context *vc)
00189 {
00190 int i;
00191
00192 av_freep(&vc->channel_residues);
00193 av_freep(&vc->channel_floors);
00194 av_freep(&vc->saved);
00195
00196 for (i = 0; i < vc->residue_count; i++)
00197 av_free(vc->residues[i].classifs);
00198 av_freep(&vc->residues);
00199 av_freep(&vc->modes);
00200
00201 ff_mdct_end(&vc->mdct[0]);
00202 ff_mdct_end(&vc->mdct[1]);
00203
00204 for (i = 0; i < vc->codebook_count; ++i) {
00205 av_free(vc->codebooks[i].codevectors);
00206 free_vlc(&vc->codebooks[i].vlc);
00207 }
00208 av_freep(&vc->codebooks);
00209
00210 for (i = 0; i < vc->floor_count; ++i) {
00211 if (vc->floors[i].floor_type == 0) {
00212 av_free(vc->floors[i].data.t0.map[0]);
00213 av_free(vc->floors[i].data.t0.map[1]);
00214 av_free(vc->floors[i].data.t0.book_list);
00215 av_free(vc->floors[i].data.t0.lsp);
00216 } else {
00217 av_free(vc->floors[i].data.t1.list);
00218 }
00219 }
00220 av_freep(&vc->floors);
00221
00222 for (i = 0; i < vc->mapping_count; ++i) {
00223 av_free(vc->mappings[i].magnitude);
00224 av_free(vc->mappings[i].angle);
00225 av_free(vc->mappings[i].mux);
00226 }
00227 av_freep(&vc->mappings);
00228 }
00229
00230
00231
00232
00233
00234 static int vorbis_parse_setup_hdr_codebooks(vorbis_context *vc)
00235 {
00236 unsigned cb;
00237 uint8_t *tmp_vlc_bits;
00238 uint32_t *tmp_vlc_codes;
00239 GetBitContext *gb = &vc->gb;
00240 uint16_t *codebook_multiplicands;
00241 int ret = 0;
00242
00243 vc->codebook_count = get_bits(gb, 8) + 1;
00244
00245 av_dlog(NULL, " Codebooks: %d \n", vc->codebook_count);
00246
00247 vc->codebooks = av_mallocz(vc->codebook_count * sizeof(*vc->codebooks));
00248 tmp_vlc_bits = av_mallocz(V_MAX_VLCS * sizeof(*tmp_vlc_bits));
00249 tmp_vlc_codes = av_mallocz(V_MAX_VLCS * sizeof(*tmp_vlc_codes));
00250 codebook_multiplicands = av_malloc(V_MAX_VLCS * sizeof(*codebook_multiplicands));
00251
00252 for (cb = 0; cb < vc->codebook_count; ++cb) {
00253 vorbis_codebook *codebook_setup = &vc->codebooks[cb];
00254 unsigned ordered, t, entries, used_entries = 0;
00255
00256 av_dlog(NULL, " %u. Codebook\n", cb);
00257
00258 if (get_bits(gb, 24) != 0x564342) {
00259 av_log(vc->avccontext, AV_LOG_ERROR,
00260 " %u. Codebook setup data corrupt.\n", cb);
00261 ret = AVERROR_INVALIDDATA;
00262 goto error;
00263 }
00264
00265 codebook_setup->dimensions=get_bits(gb, 16);
00266 if (codebook_setup->dimensions > 16 || codebook_setup->dimensions == 0) {
00267 av_log(vc->avccontext, AV_LOG_ERROR,
00268 " %u. Codebook's dimension is invalid (%d).\n",
00269 cb, codebook_setup->dimensions);
00270 ret = AVERROR_INVALIDDATA;
00271 goto error;
00272 }
00273 entries = get_bits(gb, 24);
00274 if (entries > V_MAX_VLCS) {
00275 av_log(vc->avccontext, AV_LOG_ERROR,
00276 " %u. Codebook has too many entries (%u).\n",
00277 cb, entries);
00278 ret = AVERROR_INVALIDDATA;
00279 goto error;
00280 }
00281
00282 ordered = get_bits1(gb);
00283
00284 av_dlog(NULL, " codebook_dimensions %d, codebook_entries %u\n",
00285 codebook_setup->dimensions, entries);
00286
00287 if (!ordered) {
00288 unsigned ce, flag;
00289 unsigned sparse = get_bits1(gb);
00290
00291 av_dlog(NULL, " not ordered \n");
00292
00293 if (sparse) {
00294 av_dlog(NULL, " sparse \n");
00295
00296 used_entries = 0;
00297 for (ce = 0; ce < entries; ++ce) {
00298 flag = get_bits1(gb);
00299 if (flag) {
00300 tmp_vlc_bits[ce] = get_bits(gb, 5) + 1;
00301 ++used_entries;
00302 } else
00303 tmp_vlc_bits[ce] = 0;
00304 }
00305 } else {
00306 av_dlog(NULL, " not sparse \n");
00307
00308 used_entries = entries;
00309 for (ce = 0; ce < entries; ++ce)
00310 tmp_vlc_bits[ce] = get_bits(gb, 5) + 1;
00311 }
00312 } else {
00313 unsigned current_entry = 0;
00314 unsigned current_length = get_bits(gb, 5) + 1;
00315
00316 av_dlog(NULL, " ordered, current length: %u\n", current_length);
00317
00318 used_entries = entries;
00319 for (; current_entry < used_entries && current_length <= 32; ++current_length) {
00320 unsigned i, number;
00321
00322 av_dlog(NULL, " number bits: %u ", ilog(entries - current_entry));
00323
00324 number = get_bits(gb, ilog(entries - current_entry));
00325
00326 av_dlog(NULL, " number: %u\n", number);
00327
00328 for (i = current_entry; i < number+current_entry; ++i)
00329 if (i < used_entries)
00330 tmp_vlc_bits[i] = current_length;
00331
00332 current_entry+=number;
00333 }
00334 if (current_entry>used_entries) {
00335 av_log(vc->avccontext, AV_LOG_ERROR, " More codelengths than codes in codebook. \n");
00336 ret = AVERROR_INVALIDDATA;
00337 goto error;
00338 }
00339 }
00340
00341 codebook_setup->lookup_type = get_bits(gb, 4);
00342
00343 av_dlog(NULL, " lookup type: %d : %s \n", codebook_setup->lookup_type,
00344 codebook_setup->lookup_type ? "vq" : "no lookup");
00345
00346
00347
00348 if (codebook_setup->lookup_type == 1) {
00349 unsigned i, j, k;
00350 unsigned codebook_lookup_values = ff_vorbis_nth_root(entries, codebook_setup->dimensions);
00351
00352 float codebook_minimum_value = vorbisfloat2float(get_bits_long(gb, 32));
00353 float codebook_delta_value = vorbisfloat2float(get_bits_long(gb, 32));
00354 unsigned codebook_value_bits = get_bits(gb, 4) + 1;
00355 unsigned codebook_sequence_p = get_bits1(gb);
00356
00357 av_dlog(NULL, " We expect %d numbers for building the codevectors. \n",
00358 codebook_lookup_values);
00359 av_dlog(NULL, " delta %f minmum %f \n",
00360 codebook_delta_value, codebook_minimum_value);
00361
00362 for (i = 0; i < codebook_lookup_values; ++i) {
00363 codebook_multiplicands[i] = get_bits(gb, codebook_value_bits);
00364
00365 av_dlog(NULL, " multiplicands*delta+minmum : %e \n",
00366 (float)codebook_multiplicands[i] * codebook_delta_value + codebook_minimum_value);
00367 av_dlog(NULL, " multiplicand %u\n", codebook_multiplicands[i]);
00368 }
00369
00370
00371 codebook_setup->codevectors = used_entries ? av_mallocz(used_entries *
00372 codebook_setup->dimensions *
00373 sizeof(*codebook_setup->codevectors))
00374 : NULL;
00375 for (j = 0, i = 0; i < entries; ++i) {
00376 unsigned dim = codebook_setup->dimensions;
00377
00378 if (tmp_vlc_bits[i]) {
00379 float last = 0.0;
00380 unsigned lookup_offset = i;
00381
00382 av_dlog(vc->avccontext, "Lookup offset %u ,", i);
00383
00384 for (k = 0; k < dim; ++k) {
00385 unsigned multiplicand_offset = lookup_offset % codebook_lookup_values;
00386 codebook_setup->codevectors[j * dim + k] = codebook_multiplicands[multiplicand_offset] * codebook_delta_value + codebook_minimum_value + last;
00387 if (codebook_sequence_p)
00388 last = codebook_setup->codevectors[j * dim + k];
00389 lookup_offset/=codebook_lookup_values;
00390 }
00391 tmp_vlc_bits[j] = tmp_vlc_bits[i];
00392
00393 av_dlog(vc->avccontext, "real lookup offset %u, vector: ", j);
00394 for (k = 0; k < dim; ++k)
00395 av_dlog(vc->avccontext, " %f ",
00396 codebook_setup->codevectors[j * dim + k]);
00397 av_dlog(vc->avccontext, "\n");
00398
00399 ++j;
00400 }
00401 }
00402 if (j != used_entries) {
00403 av_log(vc->avccontext, AV_LOG_ERROR, "Bug in codevector vector building code. \n");
00404 ret = AVERROR_INVALIDDATA;
00405 goto error;
00406 }
00407 entries = used_entries;
00408 } else if (codebook_setup->lookup_type >= 2) {
00409 av_log(vc->avccontext, AV_LOG_ERROR, "Codebook lookup type not supported. \n");
00410 ret = AVERROR_INVALIDDATA;
00411 goto error;
00412 }
00413
00414
00415 if (ff_vorbis_len2vlc(tmp_vlc_bits, tmp_vlc_codes, entries)) {
00416 av_log(vc->avccontext, AV_LOG_ERROR, " Invalid code lengths while generating vlcs. \n");
00417 ret = AVERROR_INVALIDDATA;
00418 goto error;
00419 }
00420 codebook_setup->maxdepth = 0;
00421 for (t = 0; t < entries; ++t)
00422 if (tmp_vlc_bits[t] >= codebook_setup->maxdepth)
00423 codebook_setup->maxdepth = tmp_vlc_bits[t];
00424
00425 if (codebook_setup->maxdepth > 3 * V_NB_BITS)
00426 codebook_setup->nb_bits = V_NB_BITS2;
00427 else
00428 codebook_setup->nb_bits = V_NB_BITS;
00429
00430 codebook_setup->maxdepth = (codebook_setup->maxdepth+codebook_setup->nb_bits - 1) / codebook_setup->nb_bits;
00431
00432 if ((ret = init_vlc(&codebook_setup->vlc, codebook_setup->nb_bits,
00433 entries, tmp_vlc_bits, sizeof(*tmp_vlc_bits),
00434 sizeof(*tmp_vlc_bits), tmp_vlc_codes,
00435 sizeof(*tmp_vlc_codes), sizeof(*tmp_vlc_codes),
00436 INIT_VLC_LE))) {
00437 av_log(vc->avccontext, AV_LOG_ERROR, " Error generating vlc tables. \n");
00438 goto error;
00439 }
00440 }
00441
00442 av_free(tmp_vlc_bits);
00443 av_free(tmp_vlc_codes);
00444 av_free(codebook_multiplicands);
00445 return 0;
00446
00447
00448 error:
00449 av_free(tmp_vlc_bits);
00450 av_free(tmp_vlc_codes);
00451 av_free(codebook_multiplicands);
00452 return ret;
00453 }
00454
00455
00456
00457 static int vorbis_parse_setup_hdr_tdtransforms(vorbis_context *vc)
00458 {
00459 GetBitContext *gb = &vc->gb;
00460 unsigned i, vorbis_time_count = get_bits(gb, 6) + 1;
00461
00462 for (i = 0; i < vorbis_time_count; ++i) {
00463 unsigned vorbis_tdtransform = get_bits(gb, 16);
00464
00465 av_dlog(NULL, " Vorbis time domain transform %u: %u\n",
00466 vorbis_time_count, vorbis_tdtransform);
00467
00468 if (vorbis_tdtransform) {
00469 av_log(vc->avccontext, AV_LOG_ERROR, "Vorbis time domain transform data nonzero. \n");
00470 return AVERROR_INVALIDDATA;
00471 }
00472 }
00473 return 0;
00474 }
00475
00476
00477
00478 static int vorbis_floor0_decode(vorbis_context *vc,
00479 vorbis_floor_data *vfu, float *vec);
00480 static void create_map(vorbis_context *vc, unsigned floor_number);
00481 static int vorbis_floor1_decode(vorbis_context *vc,
00482 vorbis_floor_data *vfu, float *vec);
00483 static int vorbis_parse_setup_hdr_floors(vorbis_context *vc)
00484 {
00485 GetBitContext *gb = &vc->gb;
00486 int i,j,k;
00487
00488 vc->floor_count = get_bits(gb, 6) + 1;
00489
00490 vc->floors = av_mallocz(vc->floor_count * sizeof(*vc->floors));
00491
00492 for (i = 0; i < vc->floor_count; ++i) {
00493 vorbis_floor *floor_setup = &vc->floors[i];
00494
00495 floor_setup->floor_type = get_bits(gb, 16);
00496
00497 av_dlog(NULL, " %d. floor type %d \n", i, floor_setup->floor_type);
00498
00499 if (floor_setup->floor_type == 1) {
00500 int maximum_class = -1;
00501 unsigned rangebits, rangemax, floor1_values = 2;
00502
00503 floor_setup->decode = vorbis_floor1_decode;
00504
00505 floor_setup->data.t1.partitions = get_bits(gb, 5);
00506
00507 av_dlog(NULL, " %d.floor: %d partitions \n",
00508 i, floor_setup->data.t1.partitions);
00509
00510 for (j = 0; j < floor_setup->data.t1.partitions; ++j) {
00511 floor_setup->data.t1.partition_class[j] = get_bits(gb, 4);
00512 if (floor_setup->data.t1.partition_class[j] > maximum_class)
00513 maximum_class = floor_setup->data.t1.partition_class[j];
00514
00515 av_dlog(NULL, " %d. floor %d partition class %d \n",
00516 i, j, floor_setup->data.t1.partition_class[j]);
00517
00518 }
00519
00520 av_dlog(NULL, " maximum class %d \n", maximum_class);
00521
00522 for (j = 0; j <= maximum_class; ++j) {
00523 floor_setup->data.t1.class_dimensions[j] = get_bits(gb, 3) + 1;
00524 floor_setup->data.t1.class_subclasses[j] = get_bits(gb, 2);
00525
00526 av_dlog(NULL, " %d floor %d class dim: %d subclasses %d \n", i, j,
00527 floor_setup->data.t1.class_dimensions[j],
00528 floor_setup->data.t1.class_subclasses[j]);
00529
00530 if (floor_setup->data.t1.class_subclasses[j]) {
00531 GET_VALIDATED_INDEX(floor_setup->data.t1.class_masterbook[j], 8, vc->codebook_count)
00532
00533 av_dlog(NULL, " masterbook: %d \n", floor_setup->data.t1.class_masterbook[j]);
00534 }
00535
00536 for (k = 0; k < (1 << floor_setup->data.t1.class_subclasses[j]); ++k) {
00537 int16_t bits = get_bits(gb, 8) - 1;
00538 if (bits != -1)
00539 VALIDATE_INDEX(bits, vc->codebook_count)
00540 floor_setup->data.t1.subclass_books[j][k] = bits;
00541
00542 av_dlog(NULL, " book %d. : %d \n", k, floor_setup->data.t1.subclass_books[j][k]);
00543 }
00544 }
00545
00546 floor_setup->data.t1.multiplier = get_bits(gb, 2) + 1;
00547 floor_setup->data.t1.x_list_dim = 2;
00548
00549 for (j = 0; j < floor_setup->data.t1.partitions; ++j)
00550 floor_setup->data.t1.x_list_dim+=floor_setup->data.t1.class_dimensions[floor_setup->data.t1.partition_class[j]];
00551
00552 floor_setup->data.t1.list = av_mallocz(floor_setup->data.t1.x_list_dim *
00553 sizeof(*floor_setup->data.t1.list));
00554
00555
00556 rangebits = get_bits(gb, 4);
00557 rangemax = (1 << rangebits);
00558 if (rangemax > vc->blocksize[1] / 2) {
00559 av_log(vc->avccontext, AV_LOG_ERROR,
00560 "Floor value is too large for blocksize: %u (%"PRIu32")\n",
00561 rangemax, vc->blocksize[1] / 2);
00562 return AVERROR_INVALIDDATA;
00563 }
00564 floor_setup->data.t1.list[0].x = 0;
00565 floor_setup->data.t1.list[1].x = rangemax;
00566
00567 for (j = 0; j < floor_setup->data.t1.partitions; ++j) {
00568 for (k = 0; k < floor_setup->data.t1.class_dimensions[floor_setup->data.t1.partition_class[j]]; ++k, ++floor1_values) {
00569 floor_setup->data.t1.list[floor1_values].x = get_bits(gb, rangebits);
00570
00571 av_dlog(NULL, " %u. floor1 Y coord. %d\n", floor1_values,
00572 floor_setup->data.t1.list[floor1_values].x);
00573 }
00574 }
00575
00576
00577 ff_vorbis_ready_floor1_list(floor_setup->data.t1.list, floor_setup->data.t1.x_list_dim);
00578 } else if (floor_setup->floor_type == 0) {
00579 unsigned max_codebook_dim = 0;
00580
00581 floor_setup->decode = vorbis_floor0_decode;
00582
00583 floor_setup->data.t0.order = get_bits(gb, 8);
00584 floor_setup->data.t0.rate = get_bits(gb, 16);
00585 floor_setup->data.t0.bark_map_size = get_bits(gb, 16);
00586 floor_setup->data.t0.amplitude_bits = get_bits(gb, 6);
00587
00588
00589 if (floor_setup->data.t0.amplitude_bits == 0) {
00590 av_log(vc->avccontext, AV_LOG_ERROR,
00591 "Floor 0 amplitude bits is 0.\n");
00592 return AVERROR_INVALIDDATA;
00593 }
00594 floor_setup->data.t0.amplitude_offset = get_bits(gb, 8);
00595 floor_setup->data.t0.num_books = get_bits(gb, 4) + 1;
00596
00597
00598 floor_setup->data.t0.book_list =
00599 av_malloc(floor_setup->data.t0.num_books);
00600 if (!floor_setup->data.t0.book_list)
00601 return AVERROR(ENOMEM);
00602
00603 {
00604 int idx;
00605 unsigned book_idx;
00606 for (idx = 0; idx < floor_setup->data.t0.num_books; ++idx) {
00607 GET_VALIDATED_INDEX(book_idx, 8, vc->codebook_count)
00608 floor_setup->data.t0.book_list[idx] = book_idx;
00609 if (vc->codebooks[book_idx].dimensions > max_codebook_dim)
00610 max_codebook_dim = vc->codebooks[book_idx].dimensions;
00611 }
00612 }
00613
00614 create_map(vc, i);
00615
00616
00617
00618 floor_setup->data.t0.lsp =
00619 av_malloc((floor_setup->data.t0.order + 1 + max_codebook_dim)
00620 * sizeof(*floor_setup->data.t0.lsp));
00621 if (!floor_setup->data.t0.lsp)
00622 return AVERROR(ENOMEM);
00623
00624
00625 av_dlog(NULL, "floor0 order: %u\n", floor_setup->data.t0.order);
00626 av_dlog(NULL, "floor0 rate: %u\n", floor_setup->data.t0.rate);
00627 av_dlog(NULL, "floor0 bark map size: %u\n",
00628 floor_setup->data.t0.bark_map_size);
00629 av_dlog(NULL, "floor0 amplitude bits: %u\n",
00630 floor_setup->data.t0.amplitude_bits);
00631 av_dlog(NULL, "floor0 amplitude offset: %u\n",
00632 floor_setup->data.t0.amplitude_offset);
00633 av_dlog(NULL, "floor0 number of books: %u\n",
00634 floor_setup->data.t0.num_books);
00635 av_dlog(NULL, "floor0 book list pointer: %p\n",
00636 floor_setup->data.t0.book_list);
00637 {
00638 int idx;
00639 for (idx = 0; idx < floor_setup->data.t0.num_books; ++idx) {
00640 av_dlog(NULL, " Book %d: %u\n", idx + 1,
00641 floor_setup->data.t0.book_list[idx]);
00642 }
00643 }
00644 } else {
00645 av_log(vc->avccontext, AV_LOG_ERROR, "Invalid floor type!\n");
00646 return AVERROR_INVALIDDATA;
00647 }
00648 }
00649 return 0;
00650 }
00651
00652
00653
00654 static int vorbis_parse_setup_hdr_residues(vorbis_context *vc)
00655 {
00656 GetBitContext *gb = &vc->gb;
00657 unsigned i, j, k;
00658
00659 vc->residue_count = get_bits(gb, 6)+1;
00660 vc->residues = av_mallocz(vc->residue_count * sizeof(*vc->residues));
00661
00662 av_dlog(NULL, " There are %d residues. \n", vc->residue_count);
00663
00664 for (i = 0; i < vc->residue_count; ++i) {
00665 vorbis_residue *res_setup = &vc->residues[i];
00666 uint8_t cascade[64];
00667 unsigned high_bits, low_bits;
00668
00669 res_setup->type = get_bits(gb, 16);
00670
00671 av_dlog(NULL, " %u. residue type %d\n", i, res_setup->type);
00672
00673 res_setup->begin = get_bits(gb, 24);
00674 res_setup->end = get_bits(gb, 24);
00675 res_setup->partition_size = get_bits(gb, 24) + 1;
00676
00677 if (res_setup->begin>res_setup->end ||
00678 res_setup->end > (res_setup->type == 2 ? vc->avccontext->channels : 1) * vc->blocksize[1] / 2 ||
00679 (res_setup->end-res_setup->begin) / res_setup->partition_size > V_MAX_PARTITIONS) {
00680 av_log(vc->avccontext, AV_LOG_ERROR,
00681 "partition out of bounds: type, begin, end, size, blocksize: %"PRIu16", %"PRIu32", %"PRIu32", %u, %"PRIu32"\n",
00682 res_setup->type, res_setup->begin, res_setup->end,
00683 res_setup->partition_size, vc->blocksize[1] / 2);
00684 return AVERROR_INVALIDDATA;
00685 }
00686
00687 res_setup->classifications = get_bits(gb, 6) + 1;
00688 GET_VALIDATED_INDEX(res_setup->classbook, 8, vc->codebook_count)
00689
00690 res_setup->ptns_to_read =
00691 (res_setup->end - res_setup->begin) / res_setup->partition_size;
00692 res_setup->classifs = av_malloc(res_setup->ptns_to_read *
00693 vc->audio_channels *
00694 sizeof(*res_setup->classifs));
00695 if (!res_setup->classifs)
00696 return AVERROR(ENOMEM);
00697
00698 av_dlog(NULL, " begin %d end %d part.size %d classif.s %d classbook %d \n",
00699 res_setup->begin, res_setup->end, res_setup->partition_size,
00700 res_setup->classifications, res_setup->classbook);
00701
00702 for (j = 0; j < res_setup->classifications; ++j) {
00703 high_bits = 0;
00704 low_bits = get_bits(gb, 3);
00705 if (get_bits1(gb))
00706 high_bits = get_bits(gb, 5);
00707 cascade[j] = (high_bits << 3) + low_bits;
00708
00709 av_dlog(NULL, " %u class cascade depth: %d\n", j, ilog(cascade[j]));
00710 }
00711
00712 res_setup->maxpass = 0;
00713 for (j = 0; j < res_setup->classifications; ++j) {
00714 for (k = 0; k < 8; ++k) {
00715 if (cascade[j]&(1 << k)) {
00716 GET_VALIDATED_INDEX(res_setup->books[j][k], 8, vc->codebook_count)
00717
00718 av_dlog(NULL, " %u class cascade depth %u book: %d\n",
00719 j, k, res_setup->books[j][k]);
00720
00721 if (k>res_setup->maxpass)
00722 res_setup->maxpass = k;
00723 } else {
00724 res_setup->books[j][k] = -1;
00725 }
00726 }
00727 }
00728 }
00729 return 0;
00730 }
00731
00732
00733
00734 static int vorbis_parse_setup_hdr_mappings(vorbis_context *vc)
00735 {
00736 GetBitContext *gb = &vc->gb;
00737 unsigned i, j;
00738
00739 vc->mapping_count = get_bits(gb, 6)+1;
00740 vc->mappings = av_mallocz(vc->mapping_count * sizeof(*vc->mappings));
00741
00742 av_dlog(NULL, " There are %d mappings. \n", vc->mapping_count);
00743
00744 for (i = 0; i < vc->mapping_count; ++i) {
00745 vorbis_mapping *mapping_setup = &vc->mappings[i];
00746
00747 if (get_bits(gb, 16)) {
00748 av_log(vc->avccontext, AV_LOG_ERROR, "Other mappings than type 0 are not compliant with the Vorbis I specification. \n");
00749 return AVERROR_INVALIDDATA;
00750 }
00751 if (get_bits1(gb)) {
00752 mapping_setup->submaps = get_bits(gb, 4) + 1;
00753 } else {
00754 mapping_setup->submaps = 1;
00755 }
00756
00757 if (get_bits1(gb)) {
00758 mapping_setup->coupling_steps = get_bits(gb, 8) + 1;
00759 mapping_setup->magnitude = av_mallocz(mapping_setup->coupling_steps *
00760 sizeof(*mapping_setup->magnitude));
00761 mapping_setup->angle = av_mallocz(mapping_setup->coupling_steps *
00762 sizeof(*mapping_setup->angle));
00763 for (j = 0; j < mapping_setup->coupling_steps; ++j) {
00764 GET_VALIDATED_INDEX(mapping_setup->magnitude[j], ilog(vc->audio_channels - 1), vc->audio_channels)
00765 GET_VALIDATED_INDEX(mapping_setup->angle[j], ilog(vc->audio_channels - 1), vc->audio_channels)
00766 }
00767 } else {
00768 mapping_setup->coupling_steps = 0;
00769 }
00770
00771 av_dlog(NULL, " %u mapping coupling steps: %d\n",
00772 i, mapping_setup->coupling_steps);
00773
00774 if (get_bits(gb, 2)) {
00775 av_log(vc->avccontext, AV_LOG_ERROR, "%u. mapping setup data invalid.\n", i);
00776 return AVERROR_INVALIDDATA;
00777 }
00778
00779 if (mapping_setup->submaps>1) {
00780 mapping_setup->mux = av_mallocz(vc->audio_channels *
00781 sizeof(*mapping_setup->mux));
00782 for (j = 0; j < vc->audio_channels; ++j)
00783 mapping_setup->mux[j] = get_bits(gb, 4);
00784 }
00785
00786 for (j = 0; j < mapping_setup->submaps; ++j) {
00787 skip_bits(gb, 8);
00788 GET_VALIDATED_INDEX(mapping_setup->submap_floor[j], 8, vc->floor_count)
00789 GET_VALIDATED_INDEX(mapping_setup->submap_residue[j], 8, vc->residue_count)
00790
00791 av_dlog(NULL, " %u mapping %u submap : floor %d, residue %d\n", i, j,
00792 mapping_setup->submap_floor[j],
00793 mapping_setup->submap_residue[j]);
00794 }
00795 }
00796 return 0;
00797 }
00798
00799
00800
00801 static void create_map(vorbis_context *vc, unsigned floor_number)
00802 {
00803 vorbis_floor *floors = vc->floors;
00804 vorbis_floor0 *vf;
00805 int idx;
00806 int blockflag, n;
00807 int32_t *map;
00808
00809 for (blockflag = 0; blockflag < 2; ++blockflag) {
00810 n = vc->blocksize[blockflag] / 2;
00811 floors[floor_number].data.t0.map[blockflag] =
00812 av_malloc((n + 1) * sizeof(int32_t));
00813
00814 map = floors[floor_number].data.t0.map[blockflag];
00815 vf = &floors[floor_number].data.t0;
00816
00817 for (idx = 0; idx < n; ++idx) {
00818 map[idx] = floor(BARK((vf->rate * idx) / (2.0f * n)) *
00819 (vf->bark_map_size / BARK(vf->rate / 2.0f)));
00820 if (vf->bark_map_size-1 < map[idx])
00821 map[idx] = vf->bark_map_size - 1;
00822 }
00823 map[n] = -1;
00824 vf->map_size[blockflag] = n;
00825 }
00826
00827 for (idx = 0; idx <= n; ++idx) {
00828 av_dlog(NULL, "floor0 map: map at pos %d is %d\n", idx, map[idx]);
00829 }
00830 }
00831
00832 static int vorbis_parse_setup_hdr_modes(vorbis_context *vc)
00833 {
00834 GetBitContext *gb = &vc->gb;
00835 unsigned i;
00836
00837 vc->mode_count = get_bits(gb, 6) + 1;
00838 vc->modes = av_mallocz(vc->mode_count * sizeof(*vc->modes));
00839
00840 av_dlog(NULL, " There are %d modes.\n", vc->mode_count);
00841
00842 for (i = 0; i < vc->mode_count; ++i) {
00843 vorbis_mode *mode_setup = &vc->modes[i];
00844
00845 mode_setup->blockflag = get_bits1(gb);
00846 mode_setup->windowtype = get_bits(gb, 16);
00847 mode_setup->transformtype = get_bits(gb, 16);
00848 GET_VALIDATED_INDEX(mode_setup->mapping, 8, vc->mapping_count);
00849
00850 av_dlog(NULL, " %u mode: blockflag %d, windowtype %d, transformtype %d, mapping %d\n",
00851 i, mode_setup->blockflag, mode_setup->windowtype,
00852 mode_setup->transformtype, mode_setup->mapping);
00853 }
00854 return 0;
00855 }
00856
00857
00858
00859 static int vorbis_parse_setup_hdr(vorbis_context *vc)
00860 {
00861 GetBitContext *gb = &vc->gb;
00862 int ret;
00863
00864 if ((get_bits(gb, 8) != 'v') || (get_bits(gb, 8) != 'o') ||
00865 (get_bits(gb, 8) != 'r') || (get_bits(gb, 8) != 'b') ||
00866 (get_bits(gb, 8) != 'i') || (get_bits(gb, 8) != 's')) {
00867 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (no vorbis signature). \n");
00868 return AVERROR_INVALIDDATA;
00869 }
00870
00871 if ((ret = vorbis_parse_setup_hdr_codebooks(vc))) {
00872 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (codebooks). \n");
00873 return ret;
00874 }
00875 if ((ret = vorbis_parse_setup_hdr_tdtransforms(vc))) {
00876 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (time domain transforms). \n");
00877 return ret;
00878 }
00879 if ((ret = vorbis_parse_setup_hdr_floors(vc))) {
00880 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (floors). \n");
00881 return ret;
00882 }
00883 if ((ret = vorbis_parse_setup_hdr_residues(vc))) {
00884 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (residues). \n");
00885 return ret;
00886 }
00887 if ((ret = vorbis_parse_setup_hdr_mappings(vc))) {
00888 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (mappings). \n");
00889 return ret;
00890 }
00891 if ((ret = vorbis_parse_setup_hdr_modes(vc))) {
00892 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (modes). \n");
00893 return ret;
00894 }
00895 if (!get_bits1(gb)) {
00896 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (framing flag). \n");
00897 return AVERROR_INVALIDDATA;
00898 }
00899
00900 return 0;
00901 }
00902
00903
00904
00905 static int vorbis_parse_id_hdr(vorbis_context *vc)
00906 {
00907 GetBitContext *gb = &vc->gb;
00908 unsigned bl0, bl1;
00909
00910 if ((get_bits(gb, 8) != 'v') || (get_bits(gb, 8) != 'o') ||
00911 (get_bits(gb, 8) != 'r') || (get_bits(gb, 8) != 'b') ||
00912 (get_bits(gb, 8) != 'i') || (get_bits(gb, 8) != 's')) {
00913 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis id header packet corrupt (no vorbis signature). \n");
00914 return AVERROR_INVALIDDATA;
00915 }
00916
00917 vc->version = get_bits_long(gb, 32);
00918 vc->audio_channels = get_bits(gb, 8);
00919 if (vc->audio_channels <= 0) {
00920 av_log(vc->avccontext, AV_LOG_ERROR, "Invalid number of channels\n");
00921 return AVERROR_INVALIDDATA;
00922 }
00923 vc->audio_samplerate = get_bits_long(gb, 32);
00924 if (vc->audio_samplerate <= 0) {
00925 av_log(vc->avccontext, AV_LOG_ERROR, "Invalid samplerate\n");
00926 return AVERROR_INVALIDDATA;
00927 }
00928 vc->bitrate_maximum = get_bits_long(gb, 32);
00929 vc->bitrate_nominal = get_bits_long(gb, 32);
00930 vc->bitrate_minimum = get_bits_long(gb, 32);
00931 bl0 = get_bits(gb, 4);
00932 bl1 = get_bits(gb, 4);
00933 vc->blocksize[0] = (1 << bl0);
00934 vc->blocksize[1] = (1 << bl1);
00935 if (bl0 > 13 || bl0 < 6 || bl1 > 13 || bl1 < 6 || bl1 < bl0) {
00936 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis id header packet corrupt (illegal blocksize). \n");
00937 return AVERROR_INVALIDDATA;
00938 }
00939 vc->win[0] = ff_vorbis_vwin[bl0 - 6];
00940 vc->win[1] = ff_vorbis_vwin[bl1 - 6];
00941
00942 if ((get_bits1(gb)) == 0) {
00943 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis id header packet corrupt (framing flag not set). \n");
00944 return AVERROR_INVALIDDATA;
00945 }
00946
00947 vc->channel_residues = av_malloc((vc->blocksize[1] / 2) * vc->audio_channels * sizeof(*vc->channel_residues));
00948 vc->channel_floors = av_malloc((vc->blocksize[1] / 2) * vc->audio_channels * sizeof(*vc->channel_floors));
00949 vc->saved = av_mallocz((vc->blocksize[1] / 4) * vc->audio_channels * sizeof(*vc->saved));
00950 vc->previous_window = 0;
00951
00952 ff_mdct_init(&vc->mdct[0], bl0, 1, -vc->scale_bias);
00953 ff_mdct_init(&vc->mdct[1], bl1, 1, -vc->scale_bias);
00954
00955 av_dlog(NULL, " vorbis version %d \n audio_channels %d \n audio_samplerate %d \n bitrate_max %d \n bitrate_nom %d \n bitrate_min %d \n blk_0 %d blk_1 %d \n ",
00956 vc->version, vc->audio_channels, vc->audio_samplerate, vc->bitrate_maximum, vc->bitrate_nominal, vc->bitrate_minimum, vc->blocksize[0], vc->blocksize[1]);
00957
00958
00959
00960
00961
00962
00963
00964
00965 return 0;
00966 }
00967
00968
00969
00970 static av_cold int vorbis_decode_init(AVCodecContext *avccontext)
00971 {
00972 vorbis_context *vc = avccontext->priv_data;
00973 uint8_t *headers = avccontext->extradata;
00974 int headers_len = avccontext->extradata_size;
00975 uint8_t *header_start[3];
00976 int header_len[3];
00977 GetBitContext *gb = &vc->gb;
00978 int hdr_type, ret;
00979
00980 vc->avccontext = avccontext;
00981 dsputil_init(&vc->dsp, avccontext);
00982 ff_fmt_convert_init(&vc->fmt_conv, avccontext);
00983
00984 if (avccontext->request_sample_fmt == AV_SAMPLE_FMT_FLT) {
00985 avccontext->sample_fmt = AV_SAMPLE_FMT_FLT;
00986 vc->scale_bias = 1.0f;
00987 } else {
00988 avccontext->sample_fmt = AV_SAMPLE_FMT_S16;
00989 vc->scale_bias = 32768.0f;
00990 }
00991
00992 if (!headers_len) {
00993 av_log(avccontext, AV_LOG_ERROR, "Extradata missing.\n");
00994 return AVERROR_INVALIDDATA;
00995 }
00996
00997 if ((ret = avpriv_split_xiph_headers(headers, headers_len, 30, header_start, header_len)) < 0) {
00998 av_log(avccontext, AV_LOG_ERROR, "Extradata corrupt.\n");
00999 return ret;
01000 }
01001
01002 init_get_bits(gb, header_start[0], header_len[0]*8);
01003 hdr_type = get_bits(gb, 8);
01004 if (hdr_type != 1) {
01005 av_log(avccontext, AV_LOG_ERROR, "First header is not the id header.\n");
01006 return AVERROR_INVALIDDATA;
01007 }
01008 if ((ret = vorbis_parse_id_hdr(vc))) {
01009 av_log(avccontext, AV_LOG_ERROR, "Id header corrupt.\n");
01010 vorbis_free(vc);
01011 return ret;
01012 }
01013
01014 init_get_bits(gb, header_start[2], header_len[2]*8);
01015 hdr_type = get_bits(gb, 8);
01016 if (hdr_type != 5) {
01017 av_log(avccontext, AV_LOG_ERROR, "Third header is not the setup header.\n");
01018 vorbis_free(vc);
01019 return AVERROR_INVALIDDATA;
01020 }
01021 if ((ret = vorbis_parse_setup_hdr(vc))) {
01022 av_log(avccontext, AV_LOG_ERROR, "Setup header corrupt.\n");
01023 vorbis_free(vc);
01024 return ret;
01025 }
01026
01027 if (vc->audio_channels > 8)
01028 avccontext->channel_layout = 0;
01029 else
01030 avccontext->channel_layout = ff_vorbis_channel_layouts[vc->audio_channels - 1];
01031
01032 avccontext->channels = vc->audio_channels;
01033 avccontext->sample_rate = vc->audio_samplerate;
01034 avccontext->frame_size = FFMIN(vc->blocksize[0], vc->blocksize[1]) >> 2;
01035
01036 avcodec_get_frame_defaults(&vc->frame);
01037 avccontext->coded_frame = &vc->frame;
01038
01039 return 0;
01040 }
01041
01042
01043
01044
01045
01046 static int vorbis_floor0_decode(vorbis_context *vc,
01047 vorbis_floor_data *vfu, float *vec)
01048 {
01049 vorbis_floor0 *vf = &vfu->t0;
01050 float *lsp = vf->lsp;
01051 unsigned amplitude, book_idx;
01052 unsigned blockflag = vc->modes[vc->mode_number].blockflag;
01053
01054 amplitude = get_bits(&vc->gb, vf->amplitude_bits);
01055 if (amplitude > 0) {
01056 float last = 0;
01057 unsigned idx, lsp_len = 0;
01058 vorbis_codebook codebook;
01059
01060 book_idx = get_bits(&vc->gb, ilog(vf->num_books));
01061 if (book_idx >= vf->num_books) {
01062 av_log(vc->avccontext, AV_LOG_ERROR,
01063 "floor0 dec: booknumber too high!\n");
01064 book_idx = 0;
01065 }
01066 av_dlog(NULL, "floor0 dec: booknumber: %u\n", book_idx);
01067 codebook = vc->codebooks[vf->book_list[book_idx]];
01068
01069 if (!codebook.codevectors)
01070 return AVERROR_INVALIDDATA;
01071
01072 while (lsp_len<vf->order) {
01073 int vec_off;
01074
01075 av_dlog(NULL, "floor0 dec: book dimension: %d\n", codebook.dimensions);
01076 av_dlog(NULL, "floor0 dec: maximum depth: %d\n", codebook.maxdepth);
01077
01078 vec_off = get_vlc2(&vc->gb, codebook.vlc.table,
01079 codebook.nb_bits, codebook.maxdepth)
01080 * codebook.dimensions;
01081 av_dlog(NULL, "floor0 dec: vector offset: %d\n", vec_off);
01082
01083 for (idx = 0; idx < codebook.dimensions; ++idx)
01084 lsp[lsp_len+idx] = codebook.codevectors[vec_off+idx] + last;
01085 last = lsp[lsp_len+idx-1];
01086
01087 lsp_len += codebook.dimensions;
01088 }
01089
01090 {
01091 int idx;
01092 for (idx = 0; idx < lsp_len; ++idx)
01093 av_dlog(NULL, "floor0 dec: coeff at %d is %f\n", idx, lsp[idx]);
01094 }
01095
01096
01097 {
01098 int i;
01099 int order = vf->order;
01100 float wstep = M_PI / vf->bark_map_size;
01101
01102 for (i = 0; i < order; i++)
01103 lsp[i] = 2.0f * cos(lsp[i]);
01104
01105 av_dlog(NULL, "floor0 synth: map_size = %"PRIu32"; m = %d; wstep = %f\n",
01106 vf->map_size[blockflag], order, wstep);
01107
01108 i = 0;
01109 while (i < vf->map_size[blockflag]) {
01110 int j, iter_cond = vf->map[blockflag][i];
01111 float p = 0.5f;
01112 float q = 0.5f;
01113 float two_cos_w = 2.0f * cos(wstep * iter_cond);
01114
01115
01116 for (j = 0; j + 1 < order; j += 2) {
01117 q *= lsp[j] - two_cos_w;
01118 p *= lsp[j + 1] - two_cos_w;
01119 }
01120 if (j == order) {
01121 p *= p * (2.0f - two_cos_w);
01122 q *= q * (2.0f + two_cos_w);
01123 } else {
01124 q *= two_cos_w-lsp[j];
01125
01126
01127 p *= p * (4.f - two_cos_w * two_cos_w);
01128 q *= q;
01129 }
01130
01131
01132 q = exp((((amplitude*vf->amplitude_offset) /
01133 (((1 << vf->amplitude_bits) - 1) * sqrt(p + q)))
01134 - vf->amplitude_offset) * .11512925f);
01135
01136
01137 do {
01138 vec[i] = q; ++i;
01139 } while (vf->map[blockflag][i] == iter_cond);
01140 }
01141 }
01142 } else {
01143
01144 return 1;
01145 }
01146
01147 av_dlog(NULL, " Floor0 decoded\n");
01148
01149 return 0;
01150 }
01151
01152 static int vorbis_floor1_decode(vorbis_context *vc,
01153 vorbis_floor_data *vfu, float *vec)
01154 {
01155 vorbis_floor1 *vf = &vfu->t1;
01156 GetBitContext *gb = &vc->gb;
01157 uint16_t range_v[4] = { 256, 128, 86, 64 };
01158 unsigned range = range_v[vf->multiplier - 1];
01159 uint16_t floor1_Y[258];
01160 uint16_t floor1_Y_final[258];
01161 int floor1_flag[258];
01162 unsigned class, cdim, cbits, csub, cval, offset, i, j;
01163 int book, adx, ady, dy, off, predicted, err;
01164
01165
01166 if (!get_bits1(gb))
01167 return 1;
01168
01169
01170
01171 floor1_Y[0] = get_bits(gb, ilog(range - 1));
01172 floor1_Y[1] = get_bits(gb, ilog(range - 1));
01173
01174 av_dlog(NULL, "floor 0 Y %d floor 1 Y %d \n", floor1_Y[0], floor1_Y[1]);
01175
01176 offset = 2;
01177 for (i = 0; i < vf->partitions; ++i) {
01178 class = vf->partition_class[i];
01179 cdim = vf->class_dimensions[class];
01180 cbits = vf->class_subclasses[class];
01181 csub = (1 << cbits) - 1;
01182 cval = 0;
01183
01184 av_dlog(NULL, "Cbits %u\n", cbits);
01185
01186 if (cbits)
01187 cval = get_vlc2(gb, vc->codebooks[vf->class_masterbook[class]].vlc.table,
01188 vc->codebooks[vf->class_masterbook[class]].nb_bits, 3);
01189
01190 for (j = 0; j < cdim; ++j) {
01191 book = vf->subclass_books[class][cval & csub];
01192
01193 av_dlog(NULL, "book %d Cbits %u cval %u bits:%d\n",
01194 book, cbits, cval, get_bits_count(gb));
01195
01196 cval = cval >> cbits;
01197 if (book > -1) {
01198 floor1_Y[offset+j] = get_vlc2(gb, vc->codebooks[book].vlc.table,
01199 vc->codebooks[book].nb_bits, 3);
01200 } else {
01201 floor1_Y[offset+j] = 0;
01202 }
01203
01204 av_dlog(NULL, " floor(%d) = %d \n",
01205 vf->list[offset+j].x, floor1_Y[offset+j]);
01206 }
01207 offset+=cdim;
01208 }
01209
01210
01211
01212 floor1_flag[0] = 1;
01213 floor1_flag[1] = 1;
01214 floor1_Y_final[0] = floor1_Y[0];
01215 floor1_Y_final[1] = floor1_Y[1];
01216
01217 for (i = 2; i < vf->x_list_dim; ++i) {
01218 unsigned val, highroom, lowroom, room, high_neigh_offs, low_neigh_offs;
01219
01220 low_neigh_offs = vf->list[i].low;
01221 high_neigh_offs = vf->list[i].high;
01222 dy = floor1_Y_final[high_neigh_offs] - floor1_Y_final[low_neigh_offs];
01223 adx = vf->list[high_neigh_offs].x - vf->list[low_neigh_offs].x;
01224 ady = FFABS(dy);
01225 err = ady * (vf->list[i].x - vf->list[low_neigh_offs].x);
01226 off = err / adx;
01227 if (dy < 0) {
01228 predicted = floor1_Y_final[low_neigh_offs] - off;
01229 } else {
01230 predicted = floor1_Y_final[low_neigh_offs] + off;
01231 }
01232
01233 val = floor1_Y[i];
01234 highroom = range-predicted;
01235 lowroom = predicted;
01236 if (highroom < lowroom) {
01237 room = highroom * 2;
01238 } else {
01239 room = lowroom * 2;
01240 }
01241 if (val) {
01242 floor1_flag[low_neigh_offs] = 1;
01243 floor1_flag[high_neigh_offs] = 1;
01244 floor1_flag[i] = 1;
01245 if (val >= room) {
01246 if (highroom > lowroom) {
01247 floor1_Y_final[i] = av_clip_uint16(val - lowroom + predicted);
01248 } else {
01249 floor1_Y_final[i] = av_clip_uint16(predicted - val + highroom - 1);
01250 }
01251 } else {
01252 if (val & 1) {
01253 floor1_Y_final[i] = av_clip_uint16(predicted - (val + 1) / 2);
01254 } else {
01255 floor1_Y_final[i] = av_clip_uint16(predicted + val / 2);
01256 }
01257 }
01258 } else {
01259 floor1_flag[i] = 0;
01260 floor1_Y_final[i] = av_clip_uint16(predicted);
01261 }
01262
01263 av_dlog(NULL, " Decoded floor(%d) = %u / val %u\n",
01264 vf->list[i].x, floor1_Y_final[i], val);
01265 }
01266
01267
01268
01269 ff_vorbis_floor1_render_list(vf->list, vf->x_list_dim, floor1_Y_final, floor1_flag, vf->multiplier, vec, vf->list[1].x);
01270
01271 av_dlog(NULL, " Floor decoded\n");
01272
01273 return 0;
01274 }
01275
01276
01277
01278 static av_always_inline int vorbis_residue_decode_internal(vorbis_context *vc,
01279 vorbis_residue *vr,
01280 unsigned ch,
01281 uint8_t *do_not_decode,
01282 float *vec,
01283 unsigned vlen,
01284 unsigned ch_left,
01285 int vr_type)
01286 {
01287 GetBitContext *gb = &vc->gb;
01288 unsigned c_p_c = vc->codebooks[vr->classbook].dimensions;
01289 unsigned ptns_to_read = vr->ptns_to_read;
01290 uint8_t *classifs = vr->classifs;
01291 unsigned pass, ch_used, i, j, k, l;
01292 unsigned max_output = (ch - 1) * vlen;
01293
01294 if (vr_type == 2) {
01295 for (j = 1; j < ch; ++j)
01296 do_not_decode[0] &= do_not_decode[j];
01297 if (do_not_decode[0])
01298 return 0;
01299 ch_used = 1;
01300 max_output += vr->end / ch;
01301 } else {
01302 ch_used = ch;
01303 max_output += vr->end;
01304 }
01305
01306 if (max_output > ch_left * vlen) {
01307 av_log(vc->avccontext, AV_LOG_ERROR, "Insufficient output buffer\n");
01308 return -1;
01309 }
01310
01311 av_dlog(NULL, " residue type 0/1/2 decode begin, ch: %d cpc %d \n", ch, c_p_c);
01312
01313 for (pass = 0; pass <= vr->maxpass; ++pass) {
01314 uint16_t voffset, partition_count, j_times_ptns_to_read;
01315
01316 voffset = vr->begin;
01317 for (partition_count = 0; partition_count < ptns_to_read;) {
01318 if (!pass) {
01319 unsigned inverse_class = ff_inverse[vr->classifications];
01320 for (j_times_ptns_to_read = 0, j = 0; j < ch_used; ++j) {
01321 if (!do_not_decode[j]) {
01322 unsigned temp = get_vlc2(gb, vc->codebooks[vr->classbook].vlc.table,
01323 vc->codebooks[vr->classbook].nb_bits, 3);
01324
01325 av_dlog(NULL, "Classword: %u\n", temp);
01326
01327 assert(vr->classifications > 1 && temp <= 65536);
01328 for (i = 0; i < c_p_c; ++i) {
01329 unsigned temp2;
01330
01331 temp2 = (((uint64_t)temp) * inverse_class) >> 32;
01332 if (partition_count + c_p_c - 1 - i < ptns_to_read)
01333 classifs[j_times_ptns_to_read + partition_count + c_p_c - 1 - i] = temp - temp2 * vr->classifications;
01334 temp = temp2;
01335 }
01336 }
01337 j_times_ptns_to_read += ptns_to_read;
01338 }
01339 }
01340 for (i = 0; (i < c_p_c) && (partition_count < ptns_to_read); ++i) {
01341 for (j_times_ptns_to_read = 0, j = 0; j < ch_used; ++j) {
01342 unsigned voffs;
01343
01344 if (!do_not_decode[j]) {
01345 unsigned vqclass = classifs[j_times_ptns_to_read + partition_count];
01346 int vqbook = vr->books[vqclass][pass];
01347
01348 if (vqbook >= 0 && vc->codebooks[vqbook].codevectors) {
01349 unsigned coffs;
01350 unsigned dim = vc->codebooks[vqbook].dimensions;
01351 unsigned step = dim == 1 ? vr->partition_size
01352 : FASTDIV(vr->partition_size, dim);
01353 vorbis_codebook codebook = vc->codebooks[vqbook];
01354
01355 if (vr_type == 0) {
01356
01357 voffs = voffset+j*vlen;
01358 for (k = 0; k < step; ++k) {
01359 coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * dim;
01360 for (l = 0; l < dim; ++l)
01361 vec[voffs + k + l * step] += codebook.codevectors[coffs + l];
01362 }
01363 } else if (vr_type == 1) {
01364 voffs = voffset + j * vlen;
01365 for (k = 0; k < step; ++k) {
01366 coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * dim;
01367 for (l = 0; l < dim; ++l, ++voffs) {
01368 vec[voffs]+=codebook.codevectors[coffs+l];
01369
01370 av_dlog(NULL, " pass %d offs: %d curr: %f change: %f cv offs.: %d \n",
01371 pass, voffs, vec[voffs], codebook.codevectors[coffs+l], coffs);
01372 }
01373 }
01374 } else if (vr_type == 2 && ch == 2 && (voffset & 1) == 0 && (dim & 1) == 0) {
01375 voffs = voffset >> 1;
01376
01377 if (dim == 2) {
01378 for (k = 0; k < step; ++k) {
01379 coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * 2;
01380 vec[voffs + k ] += codebook.codevectors[coffs ];
01381 vec[voffs + k + vlen] += codebook.codevectors[coffs + 1];
01382 }
01383 } else if (dim == 4) {
01384 for (k = 0; k < step; ++k, voffs += 2) {
01385 coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * 4;
01386 vec[voffs ] += codebook.codevectors[coffs ];
01387 vec[voffs + 1 ] += codebook.codevectors[coffs + 2];
01388 vec[voffs + vlen ] += codebook.codevectors[coffs + 1];
01389 vec[voffs + vlen + 1] += codebook.codevectors[coffs + 3];
01390 }
01391 } else
01392 for (k = 0; k < step; ++k) {
01393 coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * dim;
01394 for (l = 0; l < dim; l += 2, voffs++) {
01395 vec[voffs ] += codebook.codevectors[coffs + l ];
01396 vec[voffs + vlen] += codebook.codevectors[coffs + l + 1];
01397
01398 av_dlog(NULL, " pass %d offs: %d curr: %f change: %f cv offs.: %d+%d \n",
01399 pass, voffset / ch + (voffs % ch) * vlen,
01400 vec[voffset / ch + (voffs % ch) * vlen],
01401 codebook.codevectors[coffs + l], coffs, l);
01402 }
01403 }
01404
01405 } else if (vr_type == 2) {
01406 voffs = voffset;
01407
01408 for (k = 0; k < step; ++k) {
01409 coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * dim;
01410 for (l = 0; l < dim; ++l, ++voffs) {
01411 vec[voffs / ch + (voffs % ch) * vlen] += codebook.codevectors[coffs + l];
01412
01413 av_dlog(NULL, " pass %d offs: %d curr: %f change: %f cv offs.: %d+%d \n",
01414 pass, voffset / ch + (voffs % ch) * vlen,
01415 vec[voffset / ch + (voffs % ch) * vlen],
01416 codebook.codevectors[coffs + l], coffs, l);
01417 }
01418 }
01419 }
01420 }
01421 }
01422 j_times_ptns_to_read += ptns_to_read;
01423 }
01424 ++partition_count;
01425 voffset += vr->partition_size;
01426 }
01427 }
01428 }
01429 return 0;
01430 }
01431
01432 static inline int vorbis_residue_decode(vorbis_context *vc, vorbis_residue *vr,
01433 unsigned ch,
01434 uint8_t *do_not_decode,
01435 float *vec, unsigned vlen,
01436 unsigned ch_left)
01437 {
01438 if (vr->type == 2)
01439 return vorbis_residue_decode_internal(vc, vr, ch, do_not_decode, vec, vlen, ch_left, 2);
01440 else if (vr->type == 1)
01441 return vorbis_residue_decode_internal(vc, vr, ch, do_not_decode, vec, vlen, ch_left, 1);
01442 else if (vr->type == 0)
01443 return vorbis_residue_decode_internal(vc, vr, ch, do_not_decode, vec, vlen, ch_left, 0);
01444 else {
01445 av_log(vc->avccontext, AV_LOG_ERROR, " Invalid residue type while residue decode?! \n");
01446 return AVERROR_INVALIDDATA;
01447 }
01448 }
01449
01450 void vorbis_inverse_coupling(float *mag, float *ang, int blocksize)
01451 {
01452 int i;
01453 for (i = 0; i < blocksize; i++) {
01454 if (mag[i] > 0.0) {
01455 if (ang[i] > 0.0) {
01456 ang[i] = mag[i] - ang[i];
01457 } else {
01458 float temp = ang[i];
01459 ang[i] = mag[i];
01460 mag[i] += temp;
01461 }
01462 } else {
01463 if (ang[i] > 0.0) {
01464 ang[i] += mag[i];
01465 } else {
01466 float temp = ang[i];
01467 ang[i] = mag[i];
01468 mag[i] -= temp;
01469 }
01470 }
01471 }
01472 }
01473
01474
01475
01476 static int vorbis_parse_audio_packet(vorbis_context *vc)
01477 {
01478 GetBitContext *gb = &vc->gb;
01479 FFTContext *mdct;
01480 unsigned previous_window = vc->previous_window;
01481 unsigned mode_number, blockflag, blocksize;
01482 int i, j;
01483 uint8_t no_residue[255];
01484 uint8_t do_not_decode[255];
01485 vorbis_mapping *mapping;
01486 float *ch_res_ptr = vc->channel_residues;
01487 float *ch_floor_ptr = vc->channel_floors;
01488 uint8_t res_chan[255];
01489 unsigned res_num = 0;
01490 int retlen = 0;
01491 unsigned ch_left = vc->audio_channels;
01492 unsigned vlen;
01493
01494 if (get_bits1(gb)) {
01495 av_log(vc->avccontext, AV_LOG_ERROR, "Not a Vorbis I audio packet.\n");
01496 return AVERROR_INVALIDDATA;
01497 }
01498
01499 if (vc->mode_count == 1) {
01500 mode_number = 0;
01501 } else {
01502 GET_VALIDATED_INDEX(mode_number, ilog(vc->mode_count-1), vc->mode_count)
01503 }
01504 vc->mode_number = mode_number;
01505 mapping = &vc->mappings[vc->modes[mode_number].mapping];
01506
01507 av_dlog(NULL, " Mode number: %u , mapping: %d , blocktype %d\n", mode_number,
01508 vc->modes[mode_number].mapping, vc->modes[mode_number].blockflag);
01509
01510 blockflag = vc->modes[mode_number].blockflag;
01511 blocksize = vc->blocksize[blockflag];
01512 vlen = blocksize / 2;
01513 if (blockflag)
01514 skip_bits(gb, 2);
01515
01516 memset(ch_res_ptr, 0, sizeof(float) * vc->audio_channels * vlen);
01517 memset(ch_floor_ptr, 0, sizeof(float) * vc->audio_channels * vlen);
01518
01519
01520
01521 for (i = 0; i < vc->audio_channels; ++i) {
01522 vorbis_floor *floor;
01523 int ret;
01524 if (mapping->submaps > 1) {
01525 floor = &vc->floors[mapping->submap_floor[mapping->mux[i]]];
01526 } else {
01527 floor = &vc->floors[mapping->submap_floor[0]];
01528 }
01529
01530 ret = floor->decode(vc, &floor->data, ch_floor_ptr);
01531
01532 if (ret < 0) {
01533 av_log(vc->avccontext, AV_LOG_ERROR, "Invalid codebook in vorbis_floor_decode.\n");
01534 return AVERROR_INVALIDDATA;
01535 }
01536 no_residue[i] = ret;
01537 ch_floor_ptr += vlen;
01538 }
01539
01540
01541
01542 for (i = mapping->coupling_steps - 1; i >= 0; --i) {
01543 if (!(no_residue[mapping->magnitude[i]] & no_residue[mapping->angle[i]])) {
01544 no_residue[mapping->magnitude[i]] = 0;
01545 no_residue[mapping->angle[i]] = 0;
01546 }
01547 }
01548
01549
01550
01551 for (i = 0; i < mapping->submaps; ++i) {
01552 vorbis_residue *residue;
01553 unsigned ch = 0;
01554 int ret;
01555
01556 for (j = 0; j < vc->audio_channels; ++j) {
01557 if ((mapping->submaps == 1) || (i == mapping->mux[j])) {
01558 res_chan[j] = res_num;
01559 if (no_residue[j]) {
01560 do_not_decode[ch] = 1;
01561 } else {
01562 do_not_decode[ch] = 0;
01563 }
01564 ++ch;
01565 ++res_num;
01566 }
01567 }
01568 residue = &vc->residues[mapping->submap_residue[i]];
01569 if (ch_left < ch) {
01570 av_log(vc->avccontext, AV_LOG_ERROR, "Too many channels in vorbis_floor_decode.\n");
01571 return -1;
01572 }
01573 if (ch) {
01574 ret = vorbis_residue_decode(vc, residue, ch, do_not_decode, ch_res_ptr, vlen, ch_left);
01575 if (ret < 0)
01576 return ret;
01577 }
01578
01579 ch_res_ptr += ch * vlen;
01580 ch_left -= ch;
01581 }
01582
01583
01584
01585 for (i = mapping->coupling_steps - 1; i >= 0; --i) {
01586 float *mag, *ang;
01587
01588 mag = vc->channel_residues+res_chan[mapping->magnitude[i]] * blocksize / 2;
01589 ang = vc->channel_residues+res_chan[mapping->angle[i]] * blocksize / 2;
01590 vc->dsp.vorbis_inverse_coupling(mag, ang, blocksize / 2);
01591 }
01592
01593
01594
01595 mdct = &vc->mdct[blockflag];
01596
01597 for (j = vc->audio_channels-1;j >= 0; j--) {
01598 ch_floor_ptr = vc->channel_floors + j * blocksize / 2;
01599 ch_res_ptr = vc->channel_residues + res_chan[j] * blocksize / 2;
01600 vc->dsp.vector_fmul(ch_floor_ptr, ch_floor_ptr, ch_res_ptr, blocksize / 2);
01601 mdct->imdct_half(mdct, ch_res_ptr, ch_floor_ptr);
01602 }
01603
01604
01605
01606 retlen = (blocksize + vc->blocksize[previous_window]) / 4;
01607 for (j = 0; j < vc->audio_channels; j++) {
01608 unsigned bs0 = vc->blocksize[0];
01609 unsigned bs1 = vc->blocksize[1];
01610 float *residue = vc->channel_residues + res_chan[j] * blocksize / 2;
01611 float *saved = vc->saved + j * bs1 / 4;
01612 float *ret = vc->channel_floors + j * retlen;
01613 float *buf = residue;
01614 const float *win = vc->win[blockflag & previous_window];
01615
01616 if (blockflag == previous_window) {
01617 vc->dsp.vector_fmul_window(ret, saved, buf, win, blocksize / 4);
01618 } else if (blockflag > previous_window) {
01619 vc->dsp.vector_fmul_window(ret, saved, buf, win, bs0 / 4);
01620 memcpy(ret+bs0/2, buf+bs0/4, ((bs1-bs0)/4) * sizeof(float));
01621 } else {
01622 memcpy(ret, saved, ((bs1 - bs0) / 4) * sizeof(float));
01623 vc->dsp.vector_fmul_window(ret + (bs1 - bs0) / 4, saved + (bs1 - bs0) / 4, buf, win, bs0 / 4);
01624 }
01625 memcpy(saved, buf + blocksize / 4, blocksize / 4 * sizeof(float));
01626 }
01627
01628 vc->previous_window = blockflag;
01629 return retlen;
01630 }
01631
01632
01633
01634 static int vorbis_decode_frame(AVCodecContext *avccontext, void *data,
01635 int *got_frame_ptr, AVPacket *avpkt)
01636 {
01637 const uint8_t *buf = avpkt->data;
01638 int buf_size = avpkt->size;
01639 vorbis_context *vc = avccontext->priv_data;
01640 GetBitContext *gb = &vc->gb;
01641 const float *channel_ptrs[255];
01642 int i, len, ret;
01643
01644 av_dlog(NULL, "packet length %d \n", buf_size);
01645
01646 init_get_bits(gb, buf, buf_size*8);
01647
01648 if ((len = vorbis_parse_audio_packet(vc)) <= 0)
01649 return len;
01650
01651 if (!vc->first_frame) {
01652 vc->first_frame = 1;
01653 *got_frame_ptr = 0;
01654 return buf_size;
01655 }
01656
01657 av_dlog(NULL, "parsed %d bytes %d bits, returned %d samples (*ch*bits) \n",
01658 get_bits_count(gb) / 8, get_bits_count(gb) % 8, len);
01659
01660
01661 vc->frame.nb_samples = len;
01662 if ((ret = avccontext->get_buffer(avccontext, &vc->frame)) < 0) {
01663 av_log(avccontext, AV_LOG_ERROR, "get_buffer() failed\n");
01664 return ret;
01665 }
01666
01667 if (vc->audio_channels > 8) {
01668 for (i = 0; i < vc->audio_channels; i++)
01669 channel_ptrs[i] = vc->channel_floors + i * len;
01670 } else {
01671 for (i = 0; i < vc->audio_channels; i++)
01672 channel_ptrs[i] = vc->channel_floors +
01673 len * ff_vorbis_channel_layout_offsets[vc->audio_channels - 1][i];
01674 }
01675
01676 if (avccontext->sample_fmt == AV_SAMPLE_FMT_FLT)
01677 vc->fmt_conv.float_interleave((float *)vc->frame.data[0], channel_ptrs,
01678 len, vc->audio_channels);
01679 else
01680 vc->fmt_conv.float_to_int16_interleave((int16_t *)vc->frame.data[0],
01681 channel_ptrs, len,
01682 vc->audio_channels);
01683
01684 *got_frame_ptr = 1;
01685 *(AVFrame *)data = vc->frame;
01686
01687 return buf_size;
01688 }
01689
01690
01691
01692 static av_cold int vorbis_decode_close(AVCodecContext *avccontext)
01693 {
01694 vorbis_context *vc = avccontext->priv_data;
01695
01696 vorbis_free(vc);
01697
01698 return 0;
01699 }
01700
01701 AVCodec ff_vorbis_decoder = {
01702 .name = "vorbis",
01703 .type = AVMEDIA_TYPE_AUDIO,
01704 .id = CODEC_ID_VORBIS,
01705 .priv_data_size = sizeof(vorbis_context),
01706 .init = vorbis_decode_init,
01707 .close = vorbis_decode_close,
01708 .decode = vorbis_decode_frame,
01709 .capabilities = CODEC_CAP_DR1,
01710 .long_name = NULL_IF_CONFIG_SMALL("Vorbis"),
01711 .channel_layouts = ff_vorbis_channel_layouts,
01712 .sample_fmts = (const enum AVSampleFormat[]) {
01713 AV_SAMPLE_FMT_FLT, AV_SAMPLE_FMT_S16, AV_SAMPLE_FMT_NONE
01714 },
01715 };
01716