00001
00023 #undef V_DEBUG
00024
00025
00026
00027 #include <math.h>
00028
00029 #define ALT_BITSTREAM_READER_LE
00030 #include "avcodec.h"
00031 #include "bitstream.h"
00032 #include "dsputil.h"
00033
00034 #include "vorbis.h"
00035 #include "xiph.h"
00036
00037 #define V_NB_BITS 8
00038 #define V_NB_BITS2 11
00039 #define V_MAX_VLCS (1<<16)
00040 #define V_MAX_PARTITIONS (1<<20)
00041
00042 #ifndef V_DEBUG
00043 #define AV_DEBUG(...)
00044 #endif
00045
00046 #undef NDEBUG
00047 #include <assert.h>
00048
00049 typedef struct {
00050 uint_fast8_t dimensions;
00051 uint_fast8_t lookup_type;
00052 uint_fast8_t maxdepth;
00053 VLC vlc;
00054 float *codevectors;
00055 unsigned int nb_bits;
00056 } vorbis_codebook;
00057
00058 typedef union vorbis_floor_u vorbis_floor_data;
00059 typedef struct vorbis_floor0_s vorbis_floor0;
00060 typedef struct vorbis_floor1_s vorbis_floor1;
00061 struct vorbis_context_s;
00062 typedef
00063 uint_fast8_t (* vorbis_floor_decode_func)
00064 (struct vorbis_context_s *, vorbis_floor_data *, float *);
00065 typedef struct {
00066 uint_fast8_t floor_type;
00067 vorbis_floor_decode_func decode;
00068 union vorbis_floor_u
00069 {
00070 struct vorbis_floor0_s
00071 {
00072 uint_fast8_t order;
00073 uint_fast16_t rate;
00074 uint_fast16_t bark_map_size;
00075 int_fast32_t * map[2];
00076 uint_fast32_t map_size[2];
00077 uint_fast8_t amplitude_bits;
00078 uint_fast8_t amplitude_offset;
00079 uint_fast8_t num_books;
00080 uint_fast8_t * book_list;
00081 float * lsp;
00082 } t0;
00083 struct vorbis_floor1_s
00084 {
00085 uint_fast8_t partitions;
00086 uint_fast8_t maximum_class;
00087 uint_fast8_t partition_class[32];
00088 uint_fast8_t class_dimensions[16];
00089 uint_fast8_t class_subclasses[16];
00090 uint_fast8_t class_masterbook[16];
00091 int_fast16_t subclass_books[16][8];
00092 uint_fast8_t multiplier;
00093 uint_fast16_t x_list_dim;
00094 vorbis_floor1_entry * list;
00095 } t1;
00096 } data;
00097 } vorbis_floor;
00098
00099 typedef struct {
00100 uint_fast16_t type;
00101 uint_fast32_t begin;
00102 uint_fast32_t end;
00103 uint_fast32_t partition_size;
00104 uint_fast8_t classifications;
00105 uint_fast8_t classbook;
00106 int_fast16_t books[64][8];
00107 uint_fast8_t maxpass;
00108 } vorbis_residue;
00109
00110 typedef struct {
00111 uint_fast8_t submaps;
00112 uint_fast16_t coupling_steps;
00113 uint_fast8_t *magnitude;
00114 uint_fast8_t *angle;
00115 uint_fast8_t *mux;
00116 uint_fast8_t submap_floor[16];
00117 uint_fast8_t submap_residue[16];
00118 } vorbis_mapping;
00119
00120 typedef struct {
00121 uint_fast8_t blockflag;
00122 uint_fast16_t windowtype;
00123 uint_fast16_t transformtype;
00124 uint_fast8_t mapping;
00125 } vorbis_mode;
00126
00127 typedef struct vorbis_context_s {
00128 AVCodecContext *avccontext;
00129 GetBitContext gb;
00130 DSPContext dsp;
00131
00132 MDCTContext mdct[2];
00133 uint_fast8_t first_frame;
00134 uint_fast32_t version;
00135 uint_fast8_t audio_channels;
00136 uint_fast32_t audio_samplerate;
00137 uint_fast32_t bitrate_maximum;
00138 uint_fast32_t bitrate_nominal;
00139 uint_fast32_t bitrate_minimum;
00140 uint_fast32_t blocksize[2];
00141 const float * win[2];
00142 uint_fast16_t codebook_count;
00143 vorbis_codebook *codebooks;
00144 uint_fast8_t floor_count;
00145 vorbis_floor *floors;
00146 uint_fast8_t residue_count;
00147 vorbis_residue *residues;
00148 uint_fast8_t mapping_count;
00149 vorbis_mapping *mappings;
00150 uint_fast8_t mode_count;
00151 vorbis_mode *modes;
00152 uint_fast8_t mode_number;
00153 uint_fast8_t previous_window;
00154 float *channel_residues;
00155 float *channel_floors;
00156 float *saved;
00157 uint_fast32_t add_bias;
00158 uint_fast32_t exp_bias;
00159 } vorbis_context;
00160
00161
00162
00163 #define BARK(x) \
00164 (13.1f*atan(0.00074f*(x))+2.24f*atan(1.85e-8f*(x)*(x))+1e-4f*(x))
00165
00166 static float vorbisfloat2float(uint_fast32_t val) {
00167 double mant=val&0x1fffff;
00168 long exp=(val&0x7fe00000L)>>21;
00169 if (val&0x80000000) mant=-mant;
00170 return ldexp(mant, exp - 20 - 768);
00171 }
00172
00173
00174
00175
00176 static void vorbis_free(vorbis_context *vc) {
00177 int_fast16_t i;
00178
00179 av_freep(&vc->channel_residues);
00180 av_freep(&vc->channel_floors);
00181 av_freep(&vc->saved);
00182
00183 av_freep(&vc->residues);
00184 av_freep(&vc->modes);
00185
00186 ff_mdct_end(&vc->mdct[0]);
00187 ff_mdct_end(&vc->mdct[1]);
00188
00189 for(i=0;i<vc->codebook_count;++i) {
00190 av_free(vc->codebooks[i].codevectors);
00191 free_vlc(&vc->codebooks[i].vlc);
00192 }
00193 av_freep(&vc->codebooks);
00194
00195 for(i=0;i<vc->floor_count;++i) {
00196 if(vc->floors[i].floor_type==0) {
00197 av_free(vc->floors[i].data.t0.map[0]);
00198 av_free(vc->floors[i].data.t0.map[1]);
00199 av_free(vc->floors[i].data.t0.book_list);
00200 av_free(vc->floors[i].data.t0.lsp);
00201 }
00202 else {
00203 av_free(vc->floors[i].data.t1.list);
00204 }
00205 }
00206 av_freep(&vc->floors);
00207
00208 for(i=0;i<vc->mapping_count;++i) {
00209 av_free(vc->mappings[i].magnitude);
00210 av_free(vc->mappings[i].angle);
00211 av_free(vc->mappings[i].mux);
00212 }
00213 av_freep(&vc->mappings);
00214
00215 if(vc->exp_bias){
00216 av_freep(&vc->win[0]);
00217 av_freep(&vc->win[1]);
00218 }
00219 }
00220
00221
00222
00223
00224
00225 static int vorbis_parse_setup_hdr_codebooks(vorbis_context *vc) {
00226 uint_fast16_t cb;
00227 uint8_t *tmp_vlc_bits;
00228 uint32_t *tmp_vlc_codes;
00229 GetBitContext *gb=&vc->gb;
00230
00231 vc->codebook_count=get_bits(gb,8)+1;
00232
00233 AV_DEBUG(" Codebooks: %d \n", vc->codebook_count);
00234
00235 vc->codebooks=av_mallocz(vc->codebook_count * sizeof(vorbis_codebook));
00236 tmp_vlc_bits =av_mallocz(V_MAX_VLCS * sizeof(uint8_t));
00237 tmp_vlc_codes=av_mallocz(V_MAX_VLCS * sizeof(uint32_t));
00238
00239 for(cb=0;cb<vc->codebook_count;++cb) {
00240 vorbis_codebook *codebook_setup=&vc->codebooks[cb];
00241 uint_fast8_t ordered;
00242 uint_fast32_t t, used_entries=0;
00243 uint_fast32_t entries;
00244
00245 AV_DEBUG(" %d. Codebook \n", cb);
00246
00247 if (get_bits(gb, 24)!=0x564342) {
00248 av_log(vc->avccontext, AV_LOG_ERROR, " %"PRIdFAST16". Codebook setup data corrupt. \n", cb);
00249 goto error;
00250 }
00251
00252 codebook_setup->dimensions=get_bits(gb, 16);
00253 if (codebook_setup->dimensions>16||codebook_setup->dimensions==0) {
00254 av_log(vc->avccontext, AV_LOG_ERROR, " %"PRIdFAST16". Codebook's dimension is invalid (%d). \n", cb, codebook_setup->dimensions);
00255 goto error;
00256 }
00257 entries=get_bits(gb, 24);
00258 if (entries>V_MAX_VLCS) {
00259 av_log(vc->avccontext, AV_LOG_ERROR, " %"PRIdFAST16". Codebook has too many entries (%"PRIdFAST32"). \n", cb, entries);
00260 goto error;
00261 }
00262
00263 ordered=get_bits1(gb);
00264
00265 AV_DEBUG(" codebook_dimensions %d, codebook_entries %d \n", codebook_setup->dimensions, entries);
00266
00267 if (!ordered) {
00268 uint_fast16_t ce;
00269 uint_fast8_t flag;
00270 uint_fast8_t sparse=get_bits1(gb);
00271
00272 AV_DEBUG(" not ordered \n");
00273
00274 if (sparse) {
00275 AV_DEBUG(" sparse \n");
00276
00277 used_entries=0;
00278 for(ce=0;ce<entries;++ce) {
00279 flag=get_bits1(gb);
00280 if (flag) {
00281 tmp_vlc_bits[ce]=get_bits(gb, 5)+1;
00282 ++used_entries;
00283 }
00284 else tmp_vlc_bits[ce]=0;
00285 }
00286 } else {
00287 AV_DEBUG(" not sparse \n");
00288
00289 used_entries=entries;
00290 for(ce=0;ce<entries;++ce) {
00291 tmp_vlc_bits[ce]=get_bits(gb, 5)+1;
00292 }
00293 }
00294 } else {
00295 uint_fast16_t current_entry=0;
00296 uint_fast8_t current_length=get_bits(gb, 5)+1;
00297
00298 AV_DEBUG(" ordered, current length: %d \n", current_length);
00299
00300 used_entries=entries;
00301 for(;current_entry<used_entries;++current_length) {
00302 uint_fast16_t i, number;
00303
00304 AV_DEBUG(" number bits: %d ", ilog(entries - current_entry));
00305
00306 number=get_bits(gb, ilog(entries - current_entry));
00307
00308 AV_DEBUG(" number: %d \n", number);
00309
00310 for(i=current_entry;i<number+current_entry;++i) {
00311 if (i<used_entries) tmp_vlc_bits[i]=current_length;
00312 }
00313
00314 current_entry+=number;
00315 }
00316 if (current_entry>used_entries) {
00317 av_log(vc->avccontext, AV_LOG_ERROR, " More codelengths than codes in codebook. \n");
00318 goto error;
00319 }
00320 }
00321
00322 codebook_setup->lookup_type=get_bits(gb, 4);
00323
00324 AV_DEBUG(" lookup type: %d : %s \n", codebook_setup->lookup_type, codebook_setup->lookup_type ? "vq" : "no lookup" );
00325
00326
00327
00328 if (codebook_setup->lookup_type==1) {
00329 uint_fast16_t i, j, k;
00330 uint_fast16_t codebook_lookup_values=ff_vorbis_nth_root(entries, codebook_setup->dimensions);
00331 uint_fast16_t codebook_multiplicands[codebook_lookup_values];
00332
00333 float codebook_minimum_value=vorbisfloat2float(get_bits_long(gb, 32));
00334 float codebook_delta_value=vorbisfloat2float(get_bits_long(gb, 32));
00335 uint_fast8_t codebook_value_bits=get_bits(gb, 4)+1;
00336 uint_fast8_t codebook_sequence_p=get_bits1(gb);
00337
00338 AV_DEBUG(" We expect %d numbers for building the codevectors. \n", codebook_lookup_values);
00339 AV_DEBUG(" delta %f minmum %f \n", codebook_delta_value, codebook_minimum_value);
00340
00341 for(i=0;i<codebook_lookup_values;++i) {
00342 codebook_multiplicands[i]=get_bits(gb, codebook_value_bits);
00343
00344 AV_DEBUG(" multiplicands*delta+minmum : %e \n", (float)codebook_multiplicands[i]*codebook_delta_value+codebook_minimum_value);
00345 AV_DEBUG(" multiplicand %d \n", codebook_multiplicands[i]);
00346 }
00347
00348
00349 codebook_setup->codevectors=used_entries ? av_mallocz(used_entries*codebook_setup->dimensions * sizeof(float)) : NULL;
00350 for(j=0, i=0;i<entries;++i) {
00351 uint_fast8_t dim=codebook_setup->dimensions;
00352
00353 if (tmp_vlc_bits[i]) {
00354 float last=0.0;
00355 uint_fast32_t lookup_offset=i;
00356
00357 #ifdef V_DEBUG
00358 av_log(vc->avccontext, AV_LOG_INFO, "Lookup offset %d ,", i);
00359 #endif
00360
00361 for(k=0;k<dim;++k) {
00362 uint_fast32_t multiplicand_offset = lookup_offset % codebook_lookup_values;
00363 codebook_setup->codevectors[j*dim+k]=codebook_multiplicands[multiplicand_offset]*codebook_delta_value+codebook_minimum_value+last;
00364 if (codebook_sequence_p) {
00365 last=codebook_setup->codevectors[j*dim+k];
00366 }
00367 lookup_offset/=codebook_lookup_values;
00368 }
00369 tmp_vlc_bits[j]=tmp_vlc_bits[i];
00370
00371 #ifdef V_DEBUG
00372 av_log(vc->avccontext, AV_LOG_INFO, "real lookup offset %d, vector: ", j);
00373 for(k=0;k<dim;++k) {
00374 av_log(vc->avccontext, AV_LOG_INFO, " %f ", codebook_setup->codevectors[j*dim+k]);
00375 }
00376 av_log(vc->avccontext, AV_LOG_INFO, "\n");
00377 #endif
00378
00379 ++j;
00380 }
00381 }
00382 if (j!=used_entries) {
00383 av_log(vc->avccontext, AV_LOG_ERROR, "Bug in codevector vector building code. \n");
00384 goto error;
00385 }
00386 entries=used_entries;
00387 }
00388 else if (codebook_setup->lookup_type>=2) {
00389 av_log(vc->avccontext, AV_LOG_ERROR, "Codebook lookup type not supported. \n");
00390 goto error;
00391 }
00392
00393
00394 if (ff_vorbis_len2vlc(tmp_vlc_bits, tmp_vlc_codes, entries)) {
00395 av_log(vc->avccontext, AV_LOG_ERROR, " Invalid code lengths while generating vlcs. \n");
00396 goto error;
00397 }
00398 codebook_setup->maxdepth=0;
00399 for(t=0;t<entries;++t)
00400 if (tmp_vlc_bits[t]>=codebook_setup->maxdepth) codebook_setup->maxdepth=tmp_vlc_bits[t];
00401
00402 if(codebook_setup->maxdepth > 3*V_NB_BITS) codebook_setup->nb_bits=V_NB_BITS2;
00403 else codebook_setup->nb_bits=V_NB_BITS;
00404
00405 codebook_setup->maxdepth=(codebook_setup->maxdepth+codebook_setup->nb_bits-1)/codebook_setup->nb_bits;
00406
00407 if (init_vlc(&codebook_setup->vlc, codebook_setup->nb_bits, entries, tmp_vlc_bits, sizeof(*tmp_vlc_bits), sizeof(*tmp_vlc_bits), tmp_vlc_codes, sizeof(*tmp_vlc_codes), sizeof(*tmp_vlc_codes), INIT_VLC_LE)) {
00408 av_log(vc->avccontext, AV_LOG_ERROR, " Error generating vlc tables. \n");
00409 goto error;
00410 }
00411 }
00412
00413 av_free(tmp_vlc_bits);
00414 av_free(tmp_vlc_codes);
00415 return 0;
00416
00417
00418 error:
00419 av_free(tmp_vlc_bits);
00420 av_free(tmp_vlc_codes);
00421 return 1;
00422 }
00423
00424
00425
00426 static int vorbis_parse_setup_hdr_tdtransforms(vorbis_context *vc) {
00427 GetBitContext *gb=&vc->gb;
00428 uint_fast8_t i;
00429 uint_fast8_t vorbis_time_count=get_bits(gb, 6)+1;
00430
00431 for(i=0;i<vorbis_time_count;++i) {
00432 uint_fast16_t vorbis_tdtransform=get_bits(gb, 16);
00433
00434 AV_DEBUG(" Vorbis time domain transform %d: %d \n", vorbis_time_count, vorbis_tdtransform);
00435
00436 if (vorbis_tdtransform) {
00437 av_log(vc->avccontext, AV_LOG_ERROR, "Vorbis time domain transform data nonzero. \n");
00438 return 1;
00439 }
00440 }
00441 return 0;
00442 }
00443
00444
00445
00446 static uint_fast8_t vorbis_floor0_decode(vorbis_context *vc,
00447 vorbis_floor_data *vfu, float *vec);
00448 static void create_map( vorbis_context * vc, uint_fast8_t floor_number );
00449 static uint_fast8_t vorbis_floor1_decode(vorbis_context *vc,
00450 vorbis_floor_data *vfu, float *vec);
00451 static int vorbis_parse_setup_hdr_floors(vorbis_context *vc) {
00452 GetBitContext *gb=&vc->gb;
00453 uint_fast16_t i,j,k;
00454
00455 vc->floor_count=get_bits(gb, 6)+1;
00456
00457 vc->floors=av_mallocz(vc->floor_count * sizeof(vorbis_floor));
00458
00459 for (i=0;i<vc->floor_count;++i) {
00460 vorbis_floor *floor_setup=&vc->floors[i];
00461
00462 floor_setup->floor_type=get_bits(gb, 16);
00463
00464 AV_DEBUG(" %d. floor type %d \n", i, floor_setup->floor_type);
00465
00466 if (floor_setup->floor_type==1) {
00467 uint_fast8_t maximum_class=0;
00468 uint_fast8_t rangebits;
00469 uint_fast16_t floor1_values=2;
00470
00471 floor_setup->decode=vorbis_floor1_decode;
00472
00473 floor_setup->data.t1.partitions=get_bits(gb, 5);
00474
00475 AV_DEBUG(" %d.floor: %d partitions \n", i, floor_setup->data.t1.partitions);
00476
00477 for(j=0;j<floor_setup->data.t1.partitions;++j) {
00478 floor_setup->data.t1.partition_class[j]=get_bits(gb, 4);
00479 if (floor_setup->data.t1.partition_class[j]>maximum_class) maximum_class=floor_setup->data.t1.partition_class[j];
00480
00481 AV_DEBUG(" %d. floor %d partition class %d \n", i, j, floor_setup->data.t1.partition_class[j]);
00482
00483 }
00484
00485 AV_DEBUG(" maximum class %d \n", maximum_class);
00486
00487 floor_setup->data.t1.maximum_class=maximum_class;
00488
00489 for(j=0;j<=maximum_class;++j) {
00490 floor_setup->data.t1.class_dimensions[j]=get_bits(gb, 3)+1;
00491 floor_setup->data.t1.class_subclasses[j]=get_bits(gb, 2);
00492
00493 AV_DEBUG(" %d floor %d class dim: %d subclasses %d \n", i, j, floor_setup->data.t1.class_dimensions[j], floor_setup->data.t1.class_subclasses[j]);
00494
00495 if (floor_setup->data.t1.class_subclasses[j]) {
00496 int bits=get_bits(gb, 8);
00497 if (bits>=vc->codebook_count) {
00498 av_log(vc->avccontext, AV_LOG_ERROR, "Masterbook index %d is out of range.\n", bits);
00499 return 1;
00500 }
00501 floor_setup->data.t1.class_masterbook[j]=bits;
00502
00503 AV_DEBUG(" masterbook: %d \n", floor_setup->data.t1.class_masterbook[j]);
00504 }
00505
00506 for(k=0;k<(1<<floor_setup->data.t1.class_subclasses[j]);++k) {
00507 int16_t bits=get_bits(gb, 8)-1;
00508 if (bits!=-1 && bits>=vc->codebook_count) {
00509 av_log(vc->avccontext, AV_LOG_ERROR, "Subclass book index %d is out of range.\n", bits);
00510 return 1;
00511 }
00512 floor_setup->data.t1.subclass_books[j][k]=bits;
00513
00514 AV_DEBUG(" book %d. : %d \n", k, floor_setup->data.t1.subclass_books[j][k]);
00515 }
00516 }
00517
00518 floor_setup->data.t1.multiplier=get_bits(gb, 2)+1;
00519 floor_setup->data.t1.x_list_dim=2;
00520
00521 for(j=0;j<floor_setup->data.t1.partitions;++j) {
00522 floor_setup->data.t1.x_list_dim+=floor_setup->data.t1.class_dimensions[floor_setup->data.t1.partition_class[j]];
00523 }
00524
00525 floor_setup->data.t1.list=av_mallocz(floor_setup->data.t1.x_list_dim * sizeof(vorbis_floor1_entry));
00526
00527
00528 rangebits=get_bits(gb, 4);
00529 floor_setup->data.t1.list[0].x = 0;
00530 floor_setup->data.t1.list[1].x = (1<<rangebits);
00531
00532 for(j=0;j<floor_setup->data.t1.partitions;++j) {
00533 for(k=0;k<floor_setup->data.t1.class_dimensions[floor_setup->data.t1.partition_class[j]];++k,++floor1_values) {
00534 floor_setup->data.t1.list[floor1_values].x=get_bits(gb, rangebits);
00535
00536 AV_DEBUG(" %d. floor1 Y coord. %d \n", floor1_values, floor_setup->data.t1.list[floor1_values].x);
00537 }
00538 }
00539
00540
00541 ff_vorbis_ready_floor1_list(floor_setup->data.t1.list, floor_setup->data.t1.x_list_dim);
00542 }
00543 else if(floor_setup->floor_type==0) {
00544 uint_fast8_t max_codebook_dim=0;
00545
00546 floor_setup->decode=vorbis_floor0_decode;
00547
00548 floor_setup->data.t0.order=get_bits(gb, 8);
00549 floor_setup->data.t0.rate=get_bits(gb, 16);
00550 floor_setup->data.t0.bark_map_size=get_bits(gb, 16);
00551 floor_setup->data.t0.amplitude_bits=get_bits(gb, 6);
00552
00553
00554 if (floor_setup->data.t0.amplitude_bits == 0) {
00555 av_log(vc->avccontext, AV_LOG_ERROR,
00556 "Floor 0 amplitude bits is 0.\n");
00557 return 1;
00558 }
00559 floor_setup->data.t0.amplitude_offset=get_bits(gb, 8);
00560 floor_setup->data.t0.num_books=get_bits(gb, 4)+1;
00561
00562
00563 floor_setup->data.t0.book_list=
00564 av_malloc(floor_setup->data.t0.num_books);
00565 if(!floor_setup->data.t0.book_list) { return 1; }
00566
00567 {
00568 int idx;
00569 uint_fast8_t book_idx;
00570 for (idx=0;idx<floor_setup->data.t0.num_books;++idx) {
00571 book_idx=get_bits(gb, 8);
00572 if (book_idx>=vc->codebook_count)
00573 return 1;
00574 floor_setup->data.t0.book_list[idx]=book_idx;
00575 if (vc->codebooks[book_idx].dimensions > max_codebook_dim)
00576 max_codebook_dim=vc->codebooks[book_idx].dimensions;
00577 }
00578 }
00579
00580 create_map( vc, i );
00581
00582
00583 {
00584
00585
00586 floor_setup->data.t0.lsp=
00587 av_malloc((floor_setup->data.t0.order+1 + max_codebook_dim)
00588 * sizeof(float));
00589 if(!floor_setup->data.t0.lsp) { return 1; }
00590 }
00591
00592 #ifdef V_DEBUG
00593 AV_DEBUG("floor0 order: %u\n", floor_setup->data.t0.order);
00594 AV_DEBUG("floor0 rate: %u\n", floor_setup->data.t0.rate);
00595 AV_DEBUG("floor0 bark map size: %u\n",
00596 floor_setup->data.t0.bark_map_size);
00597 AV_DEBUG("floor0 amplitude bits: %u\n",
00598 floor_setup->data.t0.amplitude_bits);
00599 AV_DEBUG("floor0 amplitude offset: %u\n",
00600 floor_setup->data.t0.amplitude_offset);
00601 AV_DEBUG("floor0 number of books: %u\n",
00602 floor_setup->data.t0.num_books);
00603 AV_DEBUG("floor0 book list pointer: %p\n",
00604 floor_setup->data.t0.book_list);
00605 {
00606 int idx;
00607 for (idx=0;idx<floor_setup->data.t0.num_books;++idx) {
00608 AV_DEBUG( " Book %d: %u\n",
00609 idx+1,
00610 floor_setup->data.t0.book_list[idx] );
00611 }
00612 }
00613 #endif
00614 }
00615 else {
00616 av_log(vc->avccontext, AV_LOG_ERROR, "Invalid floor type!\n");
00617 return 1;
00618 }
00619 }
00620 return 0;
00621 }
00622
00623
00624
00625 static int vorbis_parse_setup_hdr_residues(vorbis_context *vc){
00626 GetBitContext *gb=&vc->gb;
00627 uint_fast8_t i, j, k;
00628
00629 vc->residue_count=get_bits(gb, 6)+1;
00630 vc->residues=av_mallocz(vc->residue_count * sizeof(vorbis_residue));
00631
00632 AV_DEBUG(" There are %d residues. \n", vc->residue_count);
00633
00634 for(i=0;i<vc->residue_count;++i) {
00635 vorbis_residue *res_setup=&vc->residues[i];
00636 uint_fast8_t cascade[64];
00637 uint_fast8_t high_bits;
00638 uint_fast8_t low_bits;
00639
00640 res_setup->type=get_bits(gb, 16);
00641
00642 AV_DEBUG(" %d. residue type %d \n", i, res_setup->type);
00643
00644 res_setup->begin=get_bits(gb, 24);
00645 res_setup->end=get_bits(gb, 24);
00646 res_setup->partition_size=get_bits(gb, 24)+1;
00647
00648 if (res_setup->begin>res_setup->end
00649 || res_setup->end>vc->blocksize[1]/(res_setup->type==2?1:2)
00650 || (res_setup->end-res_setup->begin)/res_setup->partition_size>V_MAX_PARTITIONS) {
00651 av_log(vc->avccontext, AV_LOG_ERROR, "partition out of bounds: type, begin, end, size, blocksize: %d, %d, %d, %d, %d\n", res_setup->type, res_setup->begin, res_setup->end, res_setup->partition_size, vc->blocksize[1]/2);
00652 return 1;
00653 }
00654
00655 res_setup->classifications=get_bits(gb, 6)+1;
00656 res_setup->classbook=get_bits(gb, 8);
00657 if (res_setup->classbook>=vc->codebook_count) {
00658 av_log(vc->avccontext, AV_LOG_ERROR, "classbook value %d out of range. \n", res_setup->classbook);
00659 return 1;
00660 }
00661
00662 AV_DEBUG(" begin %d end %d part.size %d classif.s %d classbook %d \n", res_setup->begin, res_setup->end, res_setup->partition_size,
00663 res_setup->classifications, res_setup->classbook);
00664
00665 for(j=0;j<res_setup->classifications;++j) {
00666 high_bits=0;
00667 low_bits=get_bits(gb, 3);
00668 if (get_bits1(gb)) {
00669 high_bits=get_bits(gb, 5);
00670 }
00671 cascade[j]=(high_bits<<3)+low_bits;
00672
00673 AV_DEBUG(" %d class casscade depth: %d \n", j, ilog(cascade[j]));
00674 }
00675
00676 res_setup->maxpass=0;
00677 for(j=0;j<res_setup->classifications;++j) {
00678 for(k=0;k<8;++k) {
00679 if (cascade[j]&(1<<k)) {
00680 int bits=get_bits(gb, 8);
00681 if (bits>=vc->codebook_count) {
00682 av_log(vc->avccontext, AV_LOG_ERROR, "book value %d out of range. \n", bits);
00683 return 1;
00684 }
00685 res_setup->books[j][k]=bits;
00686
00687 AV_DEBUG(" %d class casscade depth %d book: %d \n", j, k, res_setup->books[j][k]);
00688
00689 if (k>res_setup->maxpass) {
00690 res_setup->maxpass=k;
00691 }
00692 } else {
00693 res_setup->books[j][k]=-1;
00694 }
00695 }
00696 }
00697 }
00698 return 0;
00699 }
00700
00701
00702
00703 static int vorbis_parse_setup_hdr_mappings(vorbis_context *vc) {
00704 GetBitContext *gb=&vc->gb;
00705 uint_fast8_t i, j;
00706
00707 vc->mapping_count=get_bits(gb, 6)+1;
00708 vc->mappings=av_mallocz(vc->mapping_count * sizeof(vorbis_mapping));
00709
00710 AV_DEBUG(" There are %d mappings. \n", vc->mapping_count);
00711
00712 for(i=0;i<vc->mapping_count;++i) {
00713 vorbis_mapping *mapping_setup=&vc->mappings[i];
00714
00715 if (get_bits(gb, 16)) {
00716 av_log(vc->avccontext, AV_LOG_ERROR, "Other mappings than type 0 are not compliant with the Vorbis I specification. \n");
00717 return 1;
00718 }
00719 if (get_bits1(gb)) {
00720 mapping_setup->submaps=get_bits(gb, 4)+1;
00721 } else {
00722 mapping_setup->submaps=1;
00723 }
00724
00725 if (get_bits1(gb)) {
00726 mapping_setup->coupling_steps=get_bits(gb, 8)+1;
00727 mapping_setup->magnitude=av_mallocz(mapping_setup->coupling_steps * sizeof(uint_fast8_t));
00728 mapping_setup->angle =av_mallocz(mapping_setup->coupling_steps * sizeof(uint_fast8_t));
00729 for(j=0;j<mapping_setup->coupling_steps;++j) {
00730 mapping_setup->magnitude[j]=get_bits(gb, ilog(vc->audio_channels-1));
00731 mapping_setup->angle[j]=get_bits(gb, ilog(vc->audio_channels-1));
00732 if (mapping_setup->magnitude[j]>=vc->audio_channels) {
00733 av_log(vc->avccontext, AV_LOG_ERROR, "magnitude channel %d out of range. \n", mapping_setup->magnitude[j]);
00734 return 1;
00735 }
00736 if (mapping_setup->angle[j]>=vc->audio_channels) {
00737 av_log(vc->avccontext, AV_LOG_ERROR, "angle channel %d out of range. \n", mapping_setup->angle[j]);
00738 return 1;
00739 }
00740 }
00741 } else {
00742 mapping_setup->coupling_steps=0;
00743 }
00744
00745 AV_DEBUG(" %d mapping coupling steps: %d \n", i, mapping_setup->coupling_steps);
00746
00747 if(get_bits(gb, 2)) {
00748 av_log(vc->avccontext, AV_LOG_ERROR, "%d. mapping setup data invalid. \n", i);
00749 return 1;
00750 }
00751
00752 if (mapping_setup->submaps>1) {
00753 mapping_setup->mux=av_mallocz(vc->audio_channels * sizeof(uint_fast8_t));
00754 for(j=0;j<vc->audio_channels;++j) {
00755 mapping_setup->mux[j]=get_bits(gb, 4);
00756 }
00757 }
00758
00759 for(j=0;j<mapping_setup->submaps;++j) {
00760 int bits;
00761 skip_bits(gb, 8);
00762 bits=get_bits(gb, 8);
00763 if (bits>=vc->floor_count) {
00764 av_log(vc->avccontext, AV_LOG_ERROR, "submap floor value %d out of range. \n", bits);
00765 return -1;
00766 }
00767 mapping_setup->submap_floor[j]=bits;
00768 bits=get_bits(gb, 8);
00769 if (bits>=vc->residue_count) {
00770 av_log(vc->avccontext, AV_LOG_ERROR, "submap residue value %d out of range. \n", bits);
00771 return -1;
00772 }
00773 mapping_setup->submap_residue[j]=bits;
00774
00775 AV_DEBUG(" %d mapping %d submap : floor %d, residue %d \n", i, j, mapping_setup->submap_floor[j], mapping_setup->submap_residue[j]);
00776 }
00777 }
00778 return 0;
00779 }
00780
00781
00782
00783 static void create_map( vorbis_context * vc, uint_fast8_t floor_number )
00784 {
00785 vorbis_floor * floors=vc->floors;
00786 vorbis_floor0 * vf;
00787 int idx;
00788 int_fast8_t blockflag;
00789 int_fast32_t * map;
00790 int_fast32_t n;
00791
00792 for (blockflag=0;blockflag<2;++blockflag)
00793 {
00794 n=vc->blocksize[blockflag]/2;
00795 floors[floor_number].data.t0.map[blockflag]=
00796 av_malloc((n+1) * sizeof(int_fast32_t));
00797
00798 map=floors[floor_number].data.t0.map[blockflag];
00799 vf=&floors[floor_number].data.t0;
00800
00801 for (idx=0; idx<n;++idx) {
00802 map[idx]=floor( BARK((vf->rate*idx)/(2.0f*n)) *
00803 ((vf->bark_map_size)/
00804 BARK(vf->rate/2.0f )) );
00805 if (vf->bark_map_size-1 < map[idx]) {
00806 map[idx]=vf->bark_map_size-1;
00807 }
00808 }
00809 map[n]=-1;
00810 vf->map_size[blockflag]=n;
00811 }
00812
00813 # ifdef V_DEBUG
00814 for(idx=0;idx<=n;++idx) {
00815 AV_DEBUG("floor0 map: map at pos %d is %d\n",
00816 idx, map[idx]);
00817 }
00818 # endif
00819 }
00820
00821 static int vorbis_parse_setup_hdr_modes(vorbis_context *vc) {
00822 GetBitContext *gb=&vc->gb;
00823 uint_fast8_t i;
00824
00825 vc->mode_count=get_bits(gb, 6)+1;
00826 vc->modes=av_mallocz(vc->mode_count * sizeof(vorbis_mode));
00827
00828 AV_DEBUG(" There are %d modes.\n", vc->mode_count);
00829
00830 for(i=0;i<vc->mode_count;++i) {
00831 vorbis_mode *mode_setup=&vc->modes[i];
00832
00833 mode_setup->blockflag=get_bits1(gb);
00834 mode_setup->windowtype=get_bits(gb, 16);
00835 mode_setup->transformtype=get_bits(gb, 16);
00836 mode_setup->mapping=get_bits(gb, 8);
00837 if (mode_setup->mapping>=vc->mapping_count) {
00838 av_log(vc->avccontext, AV_LOG_ERROR, "mode mapping value %d out of range. \n", mode_setup->mapping);
00839 return 1;
00840 }
00841
00842 AV_DEBUG(" %d mode: blockflag %d, windowtype %d, transformtype %d, mapping %d \n", i, mode_setup->blockflag, mode_setup->windowtype, mode_setup->transformtype, mode_setup->mapping);
00843 }
00844 return 0;
00845 }
00846
00847
00848
00849 static int vorbis_parse_setup_hdr(vorbis_context *vc) {
00850 GetBitContext *gb=&vc->gb;
00851
00852 if ((get_bits(gb, 8)!='v') || (get_bits(gb, 8)!='o') ||
00853 (get_bits(gb, 8)!='r') || (get_bits(gb, 8)!='b') ||
00854 (get_bits(gb, 8)!='i') || (get_bits(gb, 8)!='s')) {
00855 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (no vorbis signature). \n");
00856 return 1;
00857 }
00858
00859 if (vorbis_parse_setup_hdr_codebooks(vc)) {
00860 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (codebooks). \n");
00861 return 2;
00862 }
00863 if (vorbis_parse_setup_hdr_tdtransforms(vc)) {
00864 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (time domain transforms). \n");
00865 return 3;
00866 }
00867 if (vorbis_parse_setup_hdr_floors(vc)) {
00868 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (floors). \n");
00869 return 4;
00870 }
00871 if (vorbis_parse_setup_hdr_residues(vc)) {
00872 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (residues). \n");
00873 return 5;
00874 }
00875 if (vorbis_parse_setup_hdr_mappings(vc)) {
00876 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (mappings). \n");
00877 return 6;
00878 }
00879 if (vorbis_parse_setup_hdr_modes(vc)) {
00880 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (modes). \n");
00881 return 7;
00882 }
00883 if (!get_bits1(gb)) {
00884 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (framing flag). \n");
00885 return 8;
00886 }
00887
00888 return 0;
00889 }
00890
00891
00892
00893 static int vorbis_parse_id_hdr(vorbis_context *vc){
00894 GetBitContext *gb=&vc->gb;
00895 uint_fast8_t bl0, bl1;
00896
00897 if ((get_bits(gb, 8)!='v') || (get_bits(gb, 8)!='o') ||
00898 (get_bits(gb, 8)!='r') || (get_bits(gb, 8)!='b') ||
00899 (get_bits(gb, 8)!='i') || (get_bits(gb, 8)!='s')) {
00900 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis id header packet corrupt (no vorbis signature). \n");
00901 return 1;
00902 }
00903
00904 vc->version=get_bits_long(gb, 32);
00905 vc->audio_channels=get_bits(gb, 8);
00906 vc->audio_samplerate=get_bits_long(gb, 32);
00907 vc->bitrate_maximum=get_bits_long(gb, 32);
00908 vc->bitrate_nominal=get_bits_long(gb, 32);
00909 vc->bitrate_minimum=get_bits_long(gb, 32);
00910 bl0=get_bits(gb, 4);
00911 bl1=get_bits(gb, 4);
00912 vc->blocksize[0]=(1<<bl0);
00913 vc->blocksize[1]=(1<<bl1);
00914 if (bl0>13 || bl0<6 || bl1>13 || bl1<6 || bl1<bl0) {
00915 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis id header packet corrupt (illegal blocksize). \n");
00916 return 3;
00917 }
00918
00919 if (vc->blocksize[1]/2 * vc->audio_channels * 2 >
00920 AVCODEC_MAX_AUDIO_FRAME_SIZE) {
00921 av_log(vc->avccontext, AV_LOG_ERROR, "Vorbis channel count makes "
00922 "output packets too large.\n");
00923 return 4;
00924 }
00925 vc->win[0]=ff_vorbis_vwin[bl0-6];
00926 vc->win[1]=ff_vorbis_vwin[bl1-6];
00927
00928 if(vc->exp_bias){
00929 int i, j;
00930 for(j=0; j<2; j++){
00931 float *win = av_malloc(vc->blocksize[j]/2 * sizeof(float));
00932 for(i=0; i<vc->blocksize[j]/2; i++)
00933 win[i] = vc->win[j][i] * (1<<15);
00934 vc->win[j] = win;
00935 }
00936 }
00937
00938 if ((get_bits1(gb)) == 0) {
00939 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis id header packet corrupt (framing flag not set). \n");
00940 return 2;
00941 }
00942
00943 vc->channel_residues= av_malloc((vc->blocksize[1]/2)*vc->audio_channels * sizeof(float));
00944 vc->channel_floors = av_malloc((vc->blocksize[1]/2)*vc->audio_channels * sizeof(float));
00945 vc->saved = av_mallocz((vc->blocksize[1]/4)*vc->audio_channels * sizeof(float));
00946 vc->previous_window=0;
00947
00948 ff_mdct_init(&vc->mdct[0], bl0, 1);
00949 ff_mdct_init(&vc->mdct[1], bl1, 1);
00950
00951 AV_DEBUG(" 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 ",
00952 vc->version, vc->audio_channels, vc->audio_samplerate, vc->bitrate_maximum, vc->bitrate_nominal, vc->bitrate_minimum, vc->blocksize[0], vc->blocksize[1]);
00953
00954
00955
00956
00957
00958
00959
00960
00961 return 0;
00962 }
00963
00964
00965
00966 static av_cold int vorbis_decode_init(AVCodecContext *avccontext) {
00967 vorbis_context *vc = avccontext->priv_data ;
00968 uint8_t *headers = avccontext->extradata;
00969 int headers_len=avccontext->extradata_size;
00970 uint8_t *header_start[3];
00971 int header_len[3];
00972 GetBitContext *gb = &(vc->gb);
00973 int hdr_type;
00974
00975 vc->avccontext = avccontext;
00976 dsputil_init(&vc->dsp, avccontext);
00977
00978 if(vc->dsp.float_to_int16_interleave == ff_float_to_int16_interleave_c) {
00979 vc->add_bias = 385;
00980 vc->exp_bias = 0;
00981 } else {
00982 vc->add_bias = 0;
00983 vc->exp_bias = 15<<23;
00984 }
00985
00986 if (!headers_len) {
00987 av_log(avccontext, AV_LOG_ERROR, "Extradata corrupt.\n");
00988 return -1;
00989 }
00990
00991 if (ff_split_xiph_headers(headers, headers_len, 30, header_start, header_len) < 0) {
00992 av_log(avccontext, AV_LOG_ERROR, "Extradata corrupt.\n");
00993 return -1;
00994 }
00995
00996 init_get_bits(gb, header_start[0], header_len[0]*8);
00997 hdr_type=get_bits(gb, 8);
00998 if (hdr_type!=1) {
00999 av_log(avccontext, AV_LOG_ERROR, "First header is not the id header.\n");
01000 return -1;
01001 }
01002 if (vorbis_parse_id_hdr(vc)) {
01003 av_log(avccontext, AV_LOG_ERROR, "Id header corrupt.\n");
01004 vorbis_free(vc);
01005 return -1;
01006 }
01007
01008 init_get_bits(gb, header_start[2], header_len[2]*8);
01009 hdr_type=get_bits(gb, 8);
01010 if (hdr_type!=5) {
01011 av_log(avccontext, AV_LOG_ERROR, "Third header is not the setup header.\n");
01012 vorbis_free(vc);
01013 return -1;
01014 }
01015 if (vorbis_parse_setup_hdr(vc)) {
01016 av_log(avccontext, AV_LOG_ERROR, "Setup header corrupt.\n");
01017 vorbis_free(vc);
01018 return -1;
01019 }
01020
01021 avccontext->channels = vc->audio_channels;
01022 avccontext->sample_rate = vc->audio_samplerate;
01023 avccontext->frame_size = FFMIN(vc->blocksize[0], vc->blocksize[1])>>2;
01024 avccontext->sample_fmt = SAMPLE_FMT_S16;
01025
01026 return 0 ;
01027 }
01028
01029
01030
01031
01032
01033 static uint_fast8_t vorbis_floor0_decode(vorbis_context *vc,
01034 vorbis_floor_data *vfu, float *vec) {
01035 vorbis_floor0 * vf=&vfu->t0;
01036 float * lsp=vf->lsp;
01037 uint_fast32_t amplitude;
01038 uint_fast32_t book_idx;
01039 uint_fast8_t blockflag=vc->modes[vc->mode_number].blockflag;
01040
01041 amplitude=get_bits(&vc->gb, vf->amplitude_bits);
01042 if (amplitude>0) {
01043 float last = 0;
01044 uint_fast16_t lsp_len = 0;
01045 uint_fast16_t idx;
01046 vorbis_codebook codebook;
01047
01048 book_idx=get_bits(&vc->gb, ilog(vf->num_books));
01049 if ( book_idx >= vf->num_books ) {
01050 av_log( vc->avccontext, AV_LOG_ERROR,
01051 "floor0 dec: booknumber too high!\n" );
01052 book_idx= 0;
01053
01054 }
01055 AV_DEBUG( "floor0 dec: booknumber: %u\n", book_idx );
01056 codebook=vc->codebooks[vf->book_list[book_idx]];
01057
01058 while (lsp_len<vf->order) {
01059 int vec_off;
01060
01061 AV_DEBUG( "floor0 dec: book dimension: %d\n", codebook.dimensions );
01062 AV_DEBUG( "floor0 dec: maximum depth: %d\n", codebook.maxdepth );
01063
01064 vec_off=get_vlc2(&vc->gb,
01065 codebook.vlc.table,
01066 codebook.nb_bits,
01067 codebook.maxdepth ) *
01068 codebook.dimensions;
01069 AV_DEBUG( "floor0 dec: vector offset: %d\n", vec_off );
01070
01071 for (idx=0; idx<codebook.dimensions; ++idx) {
01072 lsp[lsp_len+idx]=codebook.codevectors[vec_off+idx]+last;
01073 }
01074 last=lsp[lsp_len+idx-1];
01075
01076 lsp_len += codebook.dimensions;
01077 }
01078 #ifdef V_DEBUG
01079
01080 {
01081 int idx;
01082 for ( idx = 0; idx < lsp_len; ++idx )
01083 AV_DEBUG("floor0 dec: coeff at %d is %f\n", idx, lsp[idx] );
01084 }
01085 #endif
01086
01087
01088 {
01089 int i;
01090 int order=vf->order;
01091 float wstep=M_PI/vf->bark_map_size;
01092
01093 for(i=0;i<order;i++) { lsp[i]=2.0f*cos(lsp[i]); }
01094
01095 AV_DEBUG("floor0 synth: map_size=%d; m=%d; wstep=%f\n",
01096 vf->map_size, order, wstep);
01097
01098 i=0;
01099 while(i<vf->map_size[blockflag]) {
01100 int j, iter_cond=vf->map[blockflag][i];
01101 float p=0.5f;
01102 float q=0.5f;
01103 float two_cos_w=2.0f*cos(wstep*iter_cond);
01104
01105
01106 for(j=0;j<order;j+=2) {
01107 q *= lsp[j] -two_cos_w;
01108 p *= lsp[j+1]-two_cos_w;
01109 }
01110 if(j==order) {
01111 p *= p*(2.0f-two_cos_w);
01112 q *= q*(2.0f+two_cos_w);
01113 }
01114 else {
01115 q *= two_cos_w-lsp[j];
01116
01117
01118 p *= p*(4.f-two_cos_w*two_cos_w);
01119 q *= q;
01120 }
01121
01122
01123 {
01124 q=exp( (
01125 ( (amplitude*vf->amplitude_offset)/
01126 (((1<<vf->amplitude_bits)-1) * sqrt(p+q)) )
01127 - vf->amplitude_offset ) * .11512925f
01128 );
01129 }
01130
01131
01132 do { vec[i]=q; ++i; }while(vf->map[blockflag][i]==iter_cond);
01133 }
01134 }
01135 }
01136 else {
01137
01138 return 1;
01139 }
01140
01141 AV_DEBUG(" Floor0 decoded\n");
01142
01143 return 0;
01144 }
01145
01146 static uint_fast8_t vorbis_floor1_decode(vorbis_context *vc, vorbis_floor_data *vfu, float *vec) {
01147 vorbis_floor1 * vf=&vfu->t1;
01148 GetBitContext *gb=&vc->gb;
01149 uint_fast16_t range_v[4]={ 256, 128, 86, 64 };
01150 uint_fast16_t range=range_v[vf->multiplier-1];
01151 uint_fast16_t floor1_Y[vf->x_list_dim];
01152 uint_fast16_t floor1_Y_final[vf->x_list_dim];
01153 int floor1_flag[vf->x_list_dim];
01154 uint_fast8_t class_;
01155 uint_fast8_t cdim;
01156 uint_fast8_t cbits;
01157 uint_fast8_t csub;
01158 uint_fast8_t cval;
01159 int_fast16_t book;
01160 uint_fast16_t offset;
01161 uint_fast16_t i,j;
01162 int_fast16_t adx, ady, off, predicted;
01163 int_fast16_t dy, err;
01164
01165
01166 if (!get_bits1(gb)) return 1;
01167
01168
01169
01170 floor1_Y[0]=get_bits(gb, ilog(range-1));
01171 floor1_Y[1]=get_bits(gb, ilog(range-1));
01172
01173 AV_DEBUG("floor 0 Y %d floor 1 Y %d \n", floor1_Y[0], floor1_Y[1]);
01174
01175 offset=2;
01176 for(i=0;i<vf->partitions;++i) {
01177 class_=vf->partition_class[i];
01178 cdim=vf->class_dimensions[class_];
01179 cbits=vf->class_subclasses[class_];
01180 csub=(1<<cbits)-1;
01181 cval=0;
01182
01183 AV_DEBUG("Cbits %d \n", cbits);
01184
01185 if (cbits) {
01186 cval=get_vlc2(gb, vc->codebooks[vf->class_masterbook[class_]].vlc.table,
01187 vc->codebooks[vf->class_masterbook[class_]].nb_bits, 3);
01188 }
01189
01190 for(j=0;j<cdim;++j) {
01191 book=vf->subclass_books[class_][cval & csub];
01192
01193 AV_DEBUG("book %d Cbits %d cval %d bits:%d \n", book, cbits, cval, get_bits_count(gb));
01194
01195 cval=cval>>cbits;
01196 if (book>-1) {
01197 floor1_Y[offset+j]=get_vlc2(gb, vc->codebooks[book].vlc.table,
01198 vc->codebooks[book].nb_bits, 3);
01199 } else {
01200 floor1_Y[offset+j]=0;
01201 }
01202
01203 AV_DEBUG(" floor(%d) = %d \n", vf->list[offset+j].x, floor1_Y[offset+j]);
01204 }
01205 offset+=cdim;
01206 }
01207
01208
01209
01210 floor1_flag[0]=1;
01211 floor1_flag[1]=1;
01212 floor1_Y_final[0]=floor1_Y[0];
01213 floor1_Y_final[1]=floor1_Y[1];
01214
01215 for(i=2;i<vf->x_list_dim;++i) {
01216 uint_fast16_t val, highroom, lowroom, room;
01217 uint_fast16_t high_neigh_offs;
01218 uint_fast16_t 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=(int16_t)err/(int16_t)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]=val-lowroom+predicted;
01248 } else {
01249 floor1_Y_final[i]=predicted-val+highroom-1;
01250 }
01251 } else {
01252 if (val & 1) {
01253 floor1_Y_final[i]=predicted-(val+1)/2;
01254 } else {
01255 floor1_Y_final[i]=predicted+val/2;
01256 }
01257 }
01258 } else {
01259 floor1_flag[i]=0;
01260 floor1_Y_final[i]=predicted;
01261 }
01262
01263 AV_DEBUG(" Decoded floor(%d) = %d / val %d \n", vf->list[i].x, floor1_Y_final[i], val);
01264 }
01265
01266
01267
01268 ff_vorbis_floor1_render_list(vf->list, vf->x_list_dim, floor1_Y_final, floor1_flag, vf->multiplier, vec, vf->list[1].x);
01269
01270 AV_DEBUG(" Floor decoded\n");
01271
01272 return 0;
01273 }
01274
01275
01276
01277 static av_always_inline int vorbis_residue_decode_internal(vorbis_context *vc, vorbis_residue *vr, uint_fast8_t ch, uint_fast8_t *do_not_decode, float *vec, uint_fast16_t vlen, int vr_type) {
01278 GetBitContext *gb=&vc->gb;
01279 uint_fast8_t c_p_c=vc->codebooks[vr->classbook].dimensions;
01280 uint_fast16_t n_to_read=vr->end-vr->begin;
01281 uint_fast16_t ptns_to_read=n_to_read/vr->partition_size;
01282 uint_fast8_t classifs[ptns_to_read*vc->audio_channels];
01283 uint_fast8_t pass;
01284 uint_fast8_t ch_used;
01285 uint_fast8_t i,j,l;
01286 uint_fast16_t k;
01287
01288 if (vr_type==2) {
01289 for(j=1;j<ch;++j) {
01290 do_not_decode[0]&=do_not_decode[j];
01291 }
01292 if (do_not_decode[0]) return 0;
01293 ch_used=1;
01294 } else {
01295 ch_used=ch;
01296 }
01297
01298 AV_DEBUG(" residue type 0/1/2 decode begin, ch: %d cpc %d \n", ch, c_p_c);
01299
01300 for(pass=0;pass<=vr->maxpass;++pass) {
01301 uint_fast16_t voffset;
01302 uint_fast16_t partition_count;
01303 uint_fast16_t j_times_ptns_to_read;
01304
01305 voffset=vr->begin;
01306 for(partition_count=0;partition_count<ptns_to_read;) {
01307 if (!pass) {
01308 uint_fast32_t inverse_class = ff_inverse[vr->classifications];
01309 for(j_times_ptns_to_read=0, j=0;j<ch_used;++j) {
01310 if (!do_not_decode[j]) {
01311 uint_fast32_t temp=get_vlc2(gb, vc->codebooks[vr->classbook].vlc.table,
01312 vc->codebooks[vr->classbook].nb_bits, 3);
01313
01314 AV_DEBUG("Classword: %d \n", temp);
01315
01316 assert(vr->classifications > 1 && temp<=65536);
01317 for(i=0;i<c_p_c;++i) {
01318 uint_fast32_t temp2;
01319
01320 temp2=(((uint_fast64_t)temp) * inverse_class)>>32;
01321 if (partition_count+c_p_c-1-i < ptns_to_read) {
01322 classifs[j_times_ptns_to_read+partition_count+c_p_c-1-i]=temp-temp2*vr->classifications;
01323 }
01324 temp=temp2;
01325 }
01326 }
01327 j_times_ptns_to_read+=ptns_to_read;
01328 }
01329 }
01330 for(i=0;(i<c_p_c) && (partition_count<ptns_to_read);++i) {
01331 for(j_times_ptns_to_read=0, j=0;j<ch_used;++j) {
01332 uint_fast16_t voffs;
01333
01334 if (!do_not_decode[j]) {
01335 uint_fast8_t vqclass=classifs[j_times_ptns_to_read+partition_count];
01336 int_fast16_t vqbook=vr->books[vqclass][pass];
01337
01338 if (vqbook>=0 && vc->codebooks[vqbook].codevectors) {
01339 uint_fast16_t coffs;
01340 unsigned dim= vc->codebooks[vqbook].dimensions;
01341 uint_fast16_t step= dim==1 ? vr->partition_size
01342 : FASTDIV(vr->partition_size, dim);
01343 vorbis_codebook codebook= vc->codebooks[vqbook];
01344
01345 if (vr_type==0) {
01346
01347 voffs=voffset+j*vlen;
01348 for(k=0;k<step;++k) {
01349 coffs=get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * dim;
01350 for(l=0;l<dim;++l) {
01351 vec[voffs+k+l*step]+=codebook.codevectors[coffs+l];
01352 }
01353 }
01354 }
01355 else if (vr_type==1) {
01356 voffs=voffset+j*vlen;
01357 for(k=0;k<step;++k) {
01358 coffs=get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * dim;
01359 for(l=0;l<dim;++l, ++voffs) {
01360 vec[voffs]+=codebook.codevectors[coffs+l];
01361
01362 AV_DEBUG(" pass %d offs: %d curr: %f change: %f cv offs.: %d \n", pass, voffs, vec[voffs], codebook.codevectors[coffs+l], coffs);
01363 }
01364 }
01365 }
01366 else if (vr_type==2 && ch==2 && (voffset&1)==0 && (dim&1)==0) {
01367 voffs=voffset>>1;
01368
01369 if(dim==2) {
01370 for(k=0;k<step;++k) {
01371 coffs=get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * 2;
01372 vec[voffs+k ]+=codebook.codevectors[coffs ];
01373 vec[voffs+k+vlen]+=codebook.codevectors[coffs+1];
01374 }
01375 } else if(dim==4) {
01376 for(k=0;k<step;++k, voffs+=2) {
01377 coffs=get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * 4;
01378 vec[voffs ]+=codebook.codevectors[coffs ];
01379 vec[voffs+1 ]+=codebook.codevectors[coffs+2];
01380 vec[voffs+vlen ]+=codebook.codevectors[coffs+1];
01381 vec[voffs+vlen+1]+=codebook.codevectors[coffs+3];
01382 }
01383 } else
01384 for(k=0;k<step;++k) {
01385 coffs=get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * dim;
01386 for(l=0;l<dim;l+=2, voffs++) {
01387 vec[voffs ]+=codebook.codevectors[coffs+l ];
01388 vec[voffs+vlen]+=codebook.codevectors[coffs+l+1];
01389
01390 AV_DEBUG(" pass %d offs: %d curr: %f change: %f cv offs.: %d+%d \n", pass, voffset/ch+(voffs%ch)*vlen, vec[voffset/ch+(voffs%ch)*vlen], codebook.codevectors[coffs+l], coffs, l);
01391 }
01392 }
01393
01394 }
01395 else if (vr_type==2) {
01396 voffs=voffset;
01397
01398 for(k=0;k<step;++k) {
01399 coffs=get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * dim;
01400 for(l=0;l<dim;++l, ++voffs) {
01401 vec[voffs/ch+(voffs%ch)*vlen]+=codebook.codevectors[coffs+l];
01402
01403 AV_DEBUG(" pass %d offs: %d curr: %f change: %f cv offs.: %d+%d \n", pass, voffset/ch+(voffs%ch)*vlen, vec[voffset/ch+(voffs%ch)*vlen], codebook.codevectors[coffs+l], coffs, l);
01404 }
01405 }
01406 }
01407 }
01408 }
01409 j_times_ptns_to_read+=ptns_to_read;
01410 }
01411 ++partition_count;
01412 voffset+=vr->partition_size;
01413 }
01414 }
01415 }
01416 return 0;
01417 }
01418
01419 static inline int vorbis_residue_decode(vorbis_context *vc, vorbis_residue *vr, uint_fast8_t ch, uint_fast8_t *do_not_decode, float *vec, uint_fast16_t vlen)
01420 {
01421 if (vr->type==2)
01422 return vorbis_residue_decode_internal(vc, vr, ch, do_not_decode, vec, vlen, 2);
01423 else if (vr->type==1)
01424 return vorbis_residue_decode_internal(vc, vr, ch, do_not_decode, vec, vlen, 1);
01425 else if (vr->type==0)
01426 return vorbis_residue_decode_internal(vc, vr, ch, do_not_decode, vec, vlen, 0);
01427 else {
01428 av_log(vc->avccontext, AV_LOG_ERROR, " Invalid residue type while residue decode?! \n");
01429 return 1;
01430 }
01431 }
01432
01433 void vorbis_inverse_coupling(float *mag, float *ang, int blocksize)
01434 {
01435 int i;
01436 for(i=0; i<blocksize; i++)
01437 {
01438 if (mag[i]>0.0) {
01439 if (ang[i]>0.0) {
01440 ang[i]=mag[i]-ang[i];
01441 } else {
01442 float temp=ang[i];
01443 ang[i]=mag[i];
01444 mag[i]+=temp;
01445 }
01446 } else {
01447 if (ang[i]>0.0) {
01448 ang[i]+=mag[i];
01449 } else {
01450 float temp=ang[i];
01451 ang[i]=mag[i];
01452 mag[i]-=temp;
01453 }
01454 }
01455 }
01456 }
01457
01458 static void copy_normalize(float *dst, float *src, int len, int exp_bias, float add_bias)
01459 {
01460 int i;
01461 if(exp_bias) {
01462 for(i=0; i<len; i++)
01463 ((uint32_t*)dst)[i] = ((uint32_t*)src)[i] + exp_bias;
01464 } else {
01465 for(i=0; i<len; i++)
01466 dst[i] = src[i] + add_bias;
01467 }
01468 }
01469
01470
01471
01472 static int vorbis_parse_audio_packet(vorbis_context *vc) {
01473 GetBitContext *gb=&vc->gb;
01474
01475 uint_fast8_t previous_window=vc->previous_window;
01476 uint_fast8_t mode_number;
01477 uint_fast8_t blockflag;
01478 uint_fast16_t blocksize;
01479 int_fast32_t i,j;
01480 uint_fast8_t no_residue[vc->audio_channels];
01481 uint_fast8_t do_not_decode[vc->audio_channels];
01482 vorbis_mapping *mapping;
01483 float *ch_res_ptr=vc->channel_residues;
01484 float *ch_floor_ptr=vc->channel_floors;
01485 uint_fast8_t res_chan[vc->audio_channels];
01486 uint_fast8_t res_num=0;
01487 int_fast16_t retlen=0;
01488 float fadd_bias = vc->add_bias;
01489
01490 if (get_bits1(gb)) {
01491 av_log(vc->avccontext, AV_LOG_ERROR, "Not a Vorbis I audio packet.\n");
01492 return -1;
01493 }
01494
01495 if (vc->mode_count==1) {
01496 mode_number=0;
01497 } else {
01498 mode_number=get_bits(gb, ilog(vc->mode_count-1));
01499 }
01500 if (mode_number>=vc->mode_count) {
01501 av_log(vc->avccontext, AV_LOG_ERROR, "mode number %d out of range.\n", mode_number);
01502 return -1;
01503 }
01504 vc->mode_number=mode_number;
01505 mapping=&vc->mappings[vc->modes[mode_number].mapping];
01506
01507 AV_DEBUG(" Mode number: %d , mapping: %d , blocktype %d \n", mode_number, vc->modes[mode_number].mapping, vc->modes[mode_number].blockflag);
01508
01509 blockflag=vc->modes[mode_number].blockflag;
01510 blocksize=vc->blocksize[blockflag];
01511 if (blockflag) {
01512 skip_bits(gb, 2);
01513 }
01514
01515 memset(ch_res_ptr, 0, sizeof(float)*vc->audio_channels*blocksize/2);
01516 memset(ch_floor_ptr, 0, sizeof(float)*vc->audio_channels*blocksize/2);
01517
01518
01519
01520 for(i=0;i<vc->audio_channels;++i) {
01521 vorbis_floor *floor;
01522 if (mapping->submaps>1) {
01523 floor=&vc->floors[mapping->submap_floor[mapping->mux[i]]];
01524 } else {
01525 floor=&vc->floors[mapping->submap_floor[0]];
01526 }
01527
01528 no_residue[i]=floor->decode(vc, &floor->data, ch_floor_ptr);
01529 ch_floor_ptr+=blocksize/2;
01530 }
01531
01532
01533
01534 for(i=mapping->coupling_steps-1;i>=0;--i) {
01535 if (!(no_residue[mapping->magnitude[i]] & no_residue[mapping->angle[i]])) {
01536 no_residue[mapping->magnitude[i]]=0;
01537 no_residue[mapping->angle[i]]=0;
01538 }
01539 }
01540
01541
01542
01543 for(i=0;i<mapping->submaps;++i) {
01544 vorbis_residue *residue;
01545 uint_fast8_t ch=0;
01546
01547 for(j=0;j<vc->audio_channels;++j) {
01548 if ((mapping->submaps==1) || (i==mapping->mux[j])) {
01549 res_chan[j]=res_num;
01550 if (no_residue[j]) {
01551 do_not_decode[ch]=1;
01552 } else {
01553 do_not_decode[ch]=0;
01554 }
01555 ++ch;
01556 ++res_num;
01557 }
01558 }
01559 residue=&vc->residues[mapping->submap_residue[i]];
01560 vorbis_residue_decode(vc, residue, ch, do_not_decode, ch_res_ptr, blocksize/2);
01561
01562 ch_res_ptr+=ch*blocksize/2;
01563 }
01564
01565
01566
01567 for(i=mapping->coupling_steps-1;i>=0;--i) {
01568 float *mag, *ang;
01569
01570 mag=vc->channel_residues+res_chan[mapping->magnitude[i]]*blocksize/2;
01571 ang=vc->channel_residues+res_chan[mapping->angle[i]]*blocksize/2;
01572 vc->dsp.vorbis_inverse_coupling(mag, ang, blocksize/2);
01573 }
01574
01575
01576
01577 for(j=vc->audio_channels-1;j>=0;j--) {
01578 ch_floor_ptr=vc->channel_floors+j*blocksize/2;
01579 ch_res_ptr=vc->channel_residues+res_chan[j]*blocksize/2;
01580 vc->dsp.vector_fmul(ch_floor_ptr, ch_res_ptr, blocksize/2);
01581 ff_imdct_half(&vc->mdct[blockflag], ch_res_ptr, ch_floor_ptr);
01582 }
01583
01584
01585
01586 retlen = (blocksize + vc->blocksize[previous_window])/4;
01587 for(j=0;j<vc->audio_channels;j++) {
01588 uint_fast16_t bs0=vc->blocksize[0];
01589 uint_fast16_t bs1=vc->blocksize[1];
01590 float *residue=vc->channel_residues+res_chan[j]*blocksize/2;
01591 float *saved=vc->saved+j*bs1/4;
01592 float *ret=vc->channel_floors+j*retlen;
01593 float *buf=residue;
01594 const float *win=vc->win[blockflag&previous_window];
01595
01596 if(blockflag == previous_window) {
01597 vc->dsp.vector_fmul_window(ret, saved, buf, win, fadd_bias, blocksize/4);
01598 } else if(blockflag > previous_window) {
01599 vc->dsp.vector_fmul_window(ret, saved, buf, win, fadd_bias, bs0/4);
01600 copy_normalize(ret+bs0/2, buf+bs0/4, (bs1-bs0)/4, vc->exp_bias, fadd_bias);
01601 } else {
01602 copy_normalize(ret, saved, (bs1-bs0)/4, vc->exp_bias, fadd_bias);
01603 vc->dsp.vector_fmul_window(ret+(bs1-bs0)/4, saved+(bs1-bs0)/4, buf, win, fadd_bias, bs0/4);
01604 }
01605 memcpy(saved, buf+blocksize/4, blocksize/4*sizeof(float));
01606 }
01607
01608 vc->previous_window = blockflag;
01609 return retlen;
01610 }
01611
01612
01613
01614 static int vorbis_decode_frame(AVCodecContext *avccontext,
01615 void *data, int *data_size,
01616 const uint8_t *buf, int buf_size)
01617 {
01618 vorbis_context *vc = avccontext->priv_data ;
01619 GetBitContext *gb = &(vc->gb);
01620 const float *channel_ptrs[vc->audio_channels];
01621 int i;
01622
01623 int_fast16_t len;
01624
01625 if(!buf_size){
01626 return 0;
01627 }
01628
01629 AV_DEBUG("packet length %d \n", buf_size);
01630
01631 init_get_bits(gb, buf, buf_size*8);
01632
01633 len=vorbis_parse_audio_packet(vc);
01634
01635 if (len<=0) {
01636 *data_size=0;
01637 return buf_size;
01638 }
01639
01640 if (!vc->first_frame) {
01641 vc->first_frame=1;
01642 *data_size=0;
01643 return buf_size ;
01644 }
01645
01646 AV_DEBUG("parsed %d bytes %d bits, returned %d samples (*ch*bits) \n", get_bits_count(gb)/8, get_bits_count(gb)%8, len);
01647
01648 for(i=0; i<vc->audio_channels; i++)
01649 channel_ptrs[i] = vc->channel_floors+i*len;
01650 vc->dsp.float_to_int16_interleave(data, channel_ptrs, len, vc->audio_channels);
01651 *data_size=len*2*vc->audio_channels;
01652
01653 return buf_size ;
01654 }
01655
01656
01657
01658 static av_cold int vorbis_decode_close(AVCodecContext *avccontext) {
01659 vorbis_context *vc = avccontext->priv_data;
01660
01661 vorbis_free(vc);
01662
01663 return 0 ;
01664 }
01665
01666 AVCodec vorbis_decoder = {
01667 "vorbis",
01668 CODEC_TYPE_AUDIO,
01669 CODEC_ID_VORBIS,
01670 sizeof(vorbis_context),
01671 vorbis_decode_init,
01672 NULL,
01673 vorbis_decode_close,
01674 vorbis_decode_frame,
01675 .long_name = NULL_IF_CONFIG_SMALL("Vorbis"),
01676 };
01677