LCOV - code coverage report
Current view: top level - libavcodec - vorbisdec.c (source / functions) Hit Total Coverage
Test: coverage.info Lines: 707 889 79.5 %
Date: 2017-12-15 18:13:28 Functions: 21 22 95.5 %

          Line data    Source code
       1             : /**
       2             :  * @file
       3             :  * Vorbis I decoder
       4             :  * @author Denes Balatoni  ( dbalatoni programozo hu )
       5             :  *
       6             :  * This file is part of FFmpeg.
       7             :  *
       8             :  * FFmpeg is free software; you can redistribute it and/or
       9             :  * modify it under the terms of the GNU Lesser General Public
      10             :  * License as published by the Free Software Foundation; either
      11             :  * version 2.1 of the License, or (at your option) any later version.
      12             :  *
      13             :  * FFmpeg is distributed in the hope that it will be useful,
      14             :  * but WITHOUT ANY WARRANTY; without even the implied warranty of
      15             :  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      16             :  * Lesser General Public License for more details.
      17             :  *
      18             :  * You should have received a copy of the GNU Lesser General Public
      19             :  * License along with FFmpeg; if not, write to the Free Software
      20             :  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
      21             :  */
      22             : 
      23             : /**
      24             :  * @file
      25             :  * Vorbis I decoder
      26             :  * @author Denes Balatoni  ( dbalatoni programozo hu )
      27             :  */
      28             : 
      29             : #include <inttypes.h>
      30             : #include <math.h>
      31             : 
      32             : #include "libavutil/avassert.h"
      33             : #include "libavutil/float_dsp.h"
      34             : 
      35             : #define BITSTREAM_READER_LE
      36             : #include "avcodec.h"
      37             : #include "fft.h"
      38             : #include "get_bits.h"
      39             : #include "internal.h"
      40             : #include "vorbis.h"
      41             : #include "vorbisdsp.h"
      42             : #include "xiph.h"
      43             : 
      44             : #define V_NB_BITS 8
      45             : #define V_NB_BITS2 11
      46             : #define V_MAX_VLCS (1 << 16)
      47             : #define V_MAX_PARTITIONS (1 << 20)
      48             : 
      49             : typedef struct vorbis_codebook {
      50             :     uint8_t      dimensions;
      51             :     uint8_t      lookup_type;
      52             :     uint8_t      maxdepth;
      53             :     VLC          vlc;
      54             :     float       *codevectors;
      55             :     unsigned int nb_bits;
      56             : } vorbis_codebook;
      57             : 
      58             : typedef union  vorbis_floor_u  vorbis_floor_data;
      59             : typedef struct vorbis_floor0_s vorbis_floor0;
      60             : typedef struct vorbis_floor1_s vorbis_floor1;
      61             : struct vorbis_context_s;
      62             : typedef
      63             : int (* vorbis_floor_decode_func)
      64             :     (struct vorbis_context_s *, vorbis_floor_data *, float *);
      65             : typedef struct vorbis_floor {
      66             :     uint8_t floor_type;
      67             :     vorbis_floor_decode_func decode;
      68             :     union vorbis_floor_u {
      69             :         struct vorbis_floor0_s {
      70             :             uint8_t       order;
      71             :             uint16_t      rate;
      72             :             uint16_t      bark_map_size;
      73             :             int32_t      *map[2];
      74             :             uint32_t      map_size[2];
      75             :             uint8_t       amplitude_bits;
      76             :             uint8_t       amplitude_offset;
      77             :             uint8_t       num_books;
      78             :             uint8_t      *book_list;
      79             :             float        *lsp;
      80             :         } t0;
      81             :         struct vorbis_floor1_s {
      82             :             uint8_t       partitions;
      83             :             uint8_t       partition_class[32];
      84             :             uint8_t       class_dimensions[16];
      85             :             uint8_t       class_subclasses[16];
      86             :             uint8_t       class_masterbook[16];
      87             :             int16_t       subclass_books[16][8];
      88             :             uint8_t       multiplier;
      89             :             uint16_t      x_list_dim;
      90             :             vorbis_floor1_entry *list;
      91             :         } t1;
      92             :     } data;
      93             : } vorbis_floor;
      94             : 
      95             : typedef struct vorbis_residue {
      96             :     uint16_t      type;
      97             :     uint32_t      begin;
      98             :     uint32_t      end;
      99             :     unsigned      partition_size;
     100             :     uint8_t       classifications;
     101             :     uint8_t       classbook;
     102             :     int16_t       books[64][8];
     103             :     uint8_t       maxpass;
     104             :     uint16_t      ptns_to_read;
     105             :     uint8_t      *classifs;
     106             : } vorbis_residue;
     107             : 
     108             : typedef struct vorbis_mapping {
     109             :     uint8_t       submaps;
     110             :     uint16_t      coupling_steps;
     111             :     uint8_t      *magnitude;
     112             :     uint8_t      *angle;
     113             :     uint8_t      *mux;
     114             :     uint8_t       submap_floor[16];
     115             :     uint8_t       submap_residue[16];
     116             : } vorbis_mapping;
     117             : 
     118             : typedef struct vorbis_mode {
     119             :     uint8_t       blockflag;
     120             :     uint16_t      windowtype;
     121             :     uint16_t      transformtype;
     122             :     uint8_t       mapping;
     123             : } vorbis_mode;
     124             : 
     125             : typedef struct vorbis_context_s {
     126             :     AVCodecContext *avctx;
     127             :     GetBitContext gb;
     128             :     VorbisDSPContext dsp;
     129             :     AVFloatDSPContext *fdsp;
     130             : 
     131             :     FFTContext mdct[2];
     132             :     uint8_t       first_frame;
     133             :     uint32_t      version;
     134             :     uint8_t       audio_channels;
     135             :     uint32_t      audio_samplerate;
     136             :     uint32_t      bitrate_maximum;
     137             :     uint32_t      bitrate_nominal;
     138             :     uint32_t      bitrate_minimum;
     139             :     uint32_t      blocksize[2];
     140             :     const float  *win[2];
     141             :     uint16_t      codebook_count;
     142             :     vorbis_codebook *codebooks;
     143             :     uint8_t       floor_count;
     144             :     vorbis_floor *floors;
     145             :     uint8_t       residue_count;
     146             :     vorbis_residue *residues;
     147             :     uint8_t       mapping_count;
     148             :     vorbis_mapping *mappings;
     149             :     uint8_t       mode_count;
     150             :     vorbis_mode  *modes;
     151             :     uint8_t       mode_number; // mode number for the current packet
     152             :     int8_t       previous_window;
     153             :     float        *channel_residues;
     154             :     float        *saved;
     155             : } vorbis_context;
     156             : 
     157             : /* Helper functions */
     158             : 
     159             : #define BARK(x) \
     160             :     (13.1f * atan(0.00074f * (x)) + 2.24f * atan(1.85e-8f * (x) * (x)) + 1e-4f * (x))
     161             : 
     162             : static const char idx_err_str[] = "Index value %d out of range (0 - %d) for %s at %s:%i\n";
     163             : #define VALIDATE_INDEX(idx, limit) \
     164             :     if (idx >= limit) {\
     165             :         av_log(vc->avctx, AV_LOG_ERROR,\
     166             :                idx_err_str,\
     167             :                (int)(idx), (int)(limit - 1), #idx, __FILE__, __LINE__);\
     168             :         return AVERROR_INVALIDDATA;\
     169             :     }
     170             : #define GET_VALIDATED_INDEX(idx, bits, limit) \
     171             :     {\
     172             :         idx = get_bits(gb, bits);\
     173             :         VALIDATE_INDEX(idx, limit)\
     174             :     }
     175             : 
     176        1558 : static float vorbisfloat2float(unsigned val)
     177             : {
     178        1558 :     double mant = val & 0x1fffff;
     179        1558 :     long exp    = (val & 0x7fe00000L) >> 21;
     180        1558 :     if (val & 0x80000000)
     181         711 :         mant = -mant;
     182        1558 :     return ldexp(mant, exp - 20 - 768);
     183             : }
     184             : 
     185             : 
     186             : // Free all allocated memory -----------------------------------------
     187             : 
     188          55 : static void vorbis_free(vorbis_context *vc)
     189             : {
     190             :     int i;
     191             : 
     192          55 :     av_freep(&vc->channel_residues);
     193          55 :     av_freep(&vc->saved);
     194          55 :     av_freep(&vc->fdsp);
     195             : 
     196          55 :     if (vc->residues)
     197         165 :         for (i = 0; i < vc->residue_count; i++)
     198         110 :             av_freep(&vc->residues[i].classifs);
     199          55 :     av_freep(&vc->residues);
     200          55 :     av_freep(&vc->modes);
     201             : 
     202          55 :     ff_mdct_end(&vc->mdct[0]);
     203          55 :     ff_mdct_end(&vc->mdct[1]);
     204             : 
     205          55 :     if (vc->codebooks)
     206        1725 :         for (i = 0; i < vc->codebook_count; ++i) {
     207        1670 :             av_freep(&vc->codebooks[i].codevectors);
     208        1670 :             ff_free_vlc(&vc->codebooks[i].vlc);
     209             :         }
     210          55 :     av_freep(&vc->codebooks);
     211             : 
     212          55 :     if (vc->floors)
     213         165 :         for (i = 0; i < vc->floor_count; ++i) {
     214         110 :             if (vc->floors[i].floor_type == 0) {
     215          44 :                 av_freep(&vc->floors[i].data.t0.map[0]);
     216          44 :                 av_freep(&vc->floors[i].data.t0.map[1]);
     217          44 :                 av_freep(&vc->floors[i].data.t0.book_list);
     218          44 :                 av_freep(&vc->floors[i].data.t0.lsp);
     219             :             } else {
     220          66 :                 av_freep(&vc->floors[i].data.t1.list);
     221             :             }
     222             :         }
     223          55 :     av_freep(&vc->floors);
     224             : 
     225          55 :     if (vc->mappings)
     226         163 :         for (i = 0; i < vc->mapping_count; ++i) {
     227         108 :             av_freep(&vc->mappings[i].magnitude);
     228         108 :             av_freep(&vc->mappings[i].angle);
     229         108 :             av_freep(&vc->mappings[i].mux);
     230             :         }
     231          55 :     av_freep(&vc->mappings);
     232          55 : }
     233             : 
     234             : // Parse setup header -------------------------------------------------
     235             : 
     236             : // Process codebooks part
     237             : 
     238          55 : static int vorbis_parse_setup_hdr_codebooks(vorbis_context *vc)
     239             : {
     240             :     unsigned cb;
     241          55 :     uint8_t  *tmp_vlc_bits  = NULL;
     242          55 :     uint32_t *tmp_vlc_codes = NULL;
     243          55 :     GetBitContext *gb = &vc->gb;
     244          55 :     uint16_t *codebook_multiplicands = NULL;
     245          55 :     int ret = 0;
     246             : 
     247          55 :     vc->codebook_count = get_bits(gb, 8) + 1;
     248             : 
     249             :     ff_dlog(NULL, " Codebooks: %d \n", vc->codebook_count);
     250             : 
     251          55 :     vc->codebooks = av_mallocz(vc->codebook_count * sizeof(*vc->codebooks));
     252          55 :     tmp_vlc_bits  = av_mallocz(V_MAX_VLCS * sizeof(*tmp_vlc_bits));
     253          55 :     tmp_vlc_codes = av_mallocz(V_MAX_VLCS * sizeof(*tmp_vlc_codes));
     254          55 :     codebook_multiplicands = av_malloc(V_MAX_VLCS * sizeof(*codebook_multiplicands));
     255          55 :     if (!vc->codebooks ||
     256          55 :         !tmp_vlc_bits || !tmp_vlc_codes || !codebook_multiplicands) {
     257           0 :         ret = AVERROR(ENOMEM);
     258           0 :         goto error;
     259             :     }
     260             : 
     261        1725 :     for (cb = 0; cb < vc->codebook_count; ++cb) {
     262        1670 :         vorbis_codebook *codebook_setup = &vc->codebooks[cb];
     263        1670 :         unsigned ordered, t, entries, used_entries = 0;
     264             : 
     265             :         ff_dlog(NULL, " %u. Codebook\n", cb);
     266             : 
     267        1670 :         if (get_bits(gb, 24) != 0x564342) {
     268           0 :             av_log(vc->avctx, AV_LOG_ERROR,
     269             :                    " %u. Codebook setup data corrupt.\n", cb);
     270           0 :             ret = AVERROR_INVALIDDATA;
     271           0 :             goto error;
     272             :         }
     273             : 
     274        1670 :         codebook_setup->dimensions=get_bits(gb, 16);
     275        1670 :         if (codebook_setup->dimensions > 16 || codebook_setup->dimensions == 0) {
     276           0 :             av_log(vc->avctx, AV_LOG_ERROR,
     277             :                    " %u. Codebook's dimension is invalid (%d).\n",
     278           0 :                    cb, codebook_setup->dimensions);
     279           0 :             ret = AVERROR_INVALIDDATA;
     280           0 :             goto error;
     281             :         }
     282        1670 :         entries = get_bits(gb, 24);
     283        1670 :         if (entries > V_MAX_VLCS) {
     284           0 :             av_log(vc->avctx, AV_LOG_ERROR,
     285             :                    " %u. Codebook has too many entries (%u).\n",
     286             :                    cb, entries);
     287           0 :             ret = AVERROR_INVALIDDATA;
     288           0 :             goto error;
     289             :         }
     290             : 
     291        1670 :         ordered = get_bits1(gb);
     292             : 
     293             :         ff_dlog(NULL, " codebook_dimensions %d, codebook_entries %u\n",
     294             :                 codebook_setup->dimensions, entries);
     295             : 
     296        1670 :         if (!ordered) {
     297             :             unsigned ce, flag;
     298        1654 :             unsigned sparse = get_bits1(gb);
     299             : 
     300             :             ff_dlog(NULL, " not ordered \n");
     301             : 
     302        1654 :             if (sparse) {
     303             :                 ff_dlog(NULL, " sparse \n");
     304             : 
     305         652 :                 used_entries = 0;
     306      249897 :                 for (ce = 0; ce < entries; ++ce) {
     307      249245 :                     flag = get_bits1(gb);
     308      249245 :                     if (flag) {
     309       83403 :                         tmp_vlc_bits[ce] = get_bits(gb, 5) + 1;
     310       83403 :                         ++used_entries;
     311             :                     } else
     312      165842 :                         tmp_vlc_bits[ce] = 0;
     313             :                 }
     314             :             } else {
     315             :                 ff_dlog(NULL, " not sparse \n");
     316             : 
     317        1002 :                 used_entries = entries;
     318      276774 :                 for (ce = 0; ce < entries; ++ce)
     319      275772 :                     tmp_vlc_bits[ce] = get_bits(gb, 5) + 1;
     320             :             }
     321             :         } else {
     322          16 :             unsigned current_entry  = 0;
     323          16 :             unsigned current_length = get_bits(gb, 5) + 1;
     324             : 
     325             :             ff_dlog(NULL, " ordered, current length: %u\n", current_length);  //FIXME
     326             : 
     327          16 :             used_entries = entries;
     328          92 :             for (; current_entry < used_entries && current_length <= 32; ++current_length) {
     329             :                 unsigned i, number;
     330             : 
     331             :                 ff_dlog(NULL, " number bits: %u ", ilog(entries - current_entry));
     332             : 
     333          76 :                 number = get_bits(gb, ilog(entries - current_entry));
     334             : 
     335             :                 ff_dlog(NULL, " number: %u\n", number);
     336             : 
     337         946 :                 for (i = current_entry; i < number+current_entry; ++i)
     338         870 :                     if (i < used_entries)
     339         870 :                         tmp_vlc_bits[i] = current_length;
     340             : 
     341          76 :                 current_entry+=number;
     342             :             }
     343          16 :             if (current_entry>used_entries) {
     344           0 :                 av_log(vc->avctx, AV_LOG_ERROR, " More codelengths than codes in codebook. \n");
     345           0 :                 ret = AVERROR_INVALIDDATA;
     346           0 :                 goto error;
     347             :             }
     348             :         }
     349             : 
     350        1670 :         codebook_setup->lookup_type = get_bits(gb, 4);
     351             : 
     352             :         ff_dlog(NULL, " lookup type: %d : %s \n", codebook_setup->lookup_type,
     353             :                 codebook_setup->lookup_type ? "vq" : "no lookup");
     354             : 
     355             : // If the codebook is used for (inverse) VQ, calculate codevectors.
     356             : 
     357        1670 :         if (codebook_setup->lookup_type == 1) {
     358             :             unsigned i, j, k;
     359         779 :             unsigned codebook_lookup_values = ff_vorbis_nth_root(entries, codebook_setup->dimensions);
     360             : 
     361         779 :             float codebook_minimum_value = vorbisfloat2float(get_bits_long(gb, 32));
     362         779 :             float codebook_delta_value   = vorbisfloat2float(get_bits_long(gb, 32));
     363         779 :             unsigned codebook_value_bits = get_bits(gb, 4) + 1;
     364         779 :             unsigned codebook_sequence_p = get_bits1(gb);
     365             : 
     366             :             ff_dlog(NULL, " We expect %d numbers for building the codevectors. \n",
     367             :                     codebook_lookup_values);
     368             :             ff_dlog(NULL, "  delta %f minmum %f \n",
     369             :                     codebook_delta_value, codebook_minimum_value);
     370             : 
     371       16968 :             for (i = 0; i < codebook_lookup_values; ++i) {
     372       16189 :                 codebook_multiplicands[i] = get_bits(gb, codebook_value_bits);
     373             : 
     374             :                 ff_dlog(NULL, " multiplicands*delta+minmum : %e \n",
     375             :                         (float)codebook_multiplicands[i] * codebook_delta_value + codebook_minimum_value);
     376             :                 ff_dlog(NULL, " multiplicand %u\n", codebook_multiplicands[i]);
     377             :             }
     378             : 
     379             : // Weed out unused vlcs and build codevector vector
     380         779 :             if (used_entries) {
     381         779 :                 codebook_setup->codevectors =
     382         779 :                     av_mallocz_array(used_entries, codebook_setup->dimensions *
     383             :                                sizeof(*codebook_setup->codevectors));
     384         779 :                 if (!codebook_setup->codevectors) {
     385           0 :                     ret = AVERROR(ENOMEM);
     386           0 :                     goto error;
     387             :                 }
     388             :             } else
     389           0 :                 codebook_setup->codevectors = NULL;
     390             : 
     391      450580 :             for (j = 0, i = 0; i < entries; ++i) {
     392      449801 :                 unsigned dim = codebook_setup->dimensions;
     393             : 
     394      449801 :                 if (tmp_vlc_bits[i]) {
     395      293437 :                     float last = 0.0;
     396      293437 :                     unsigned lookup_offset = i;
     397             : 
     398             :                     ff_dlog(vc->avctx, "Lookup offset %u ,", i);
     399             : 
     400     1169095 :                     for (k = 0; k < dim; ++k) {
     401      875658 :                         unsigned multiplicand_offset = lookup_offset % codebook_lookup_values;
     402      875658 :                         codebook_setup->codevectors[j * dim + k] = codebook_multiplicands[multiplicand_offset] * codebook_delta_value + codebook_minimum_value + last;
     403      875658 :                         if (codebook_sequence_p)
     404      257530 :                             last = codebook_setup->codevectors[j * dim + k];
     405      875658 :                         lookup_offset/=codebook_lookup_values;
     406             :                     }
     407      293437 :                     tmp_vlc_bits[j] = tmp_vlc_bits[i];
     408             : 
     409             :                     ff_dlog(vc->avctx, "real lookup offset %u, vector: ", j);
     410      293437 :                     for (k = 0; k < dim; ++k)
     411             :                         ff_dlog(vc->avctx, " %f ",
     412             :                                 codebook_setup->codevectors[j * dim + k]);
     413             :                     ff_dlog(vc->avctx, "\n");
     414             : 
     415      293437 :                     ++j;
     416             :                 }
     417             :             }
     418         779 :             if (j != used_entries) {
     419           0 :                 av_log(vc->avctx, AV_LOG_ERROR, "Bug in codevector vector building code. \n");
     420           0 :                 ret = AVERROR_INVALIDDATA;
     421           0 :                 goto error;
     422             :             }
     423         779 :             entries = used_entries;
     424         891 :         } else if (codebook_setup->lookup_type >= 2) {
     425           0 :             av_log(vc->avctx, AV_LOG_ERROR, "Codebook lookup type not supported. \n");
     426           0 :             ret = AVERROR_INVALIDDATA;
     427           0 :             goto error;
     428             :         }
     429             : 
     430             : // Initialize VLC table
     431        1670 :         if (ff_vorbis_len2vlc(tmp_vlc_bits, tmp_vlc_codes, entries)) {
     432           0 :             av_log(vc->avctx, AV_LOG_ERROR, " Invalid code lengths while generating vlcs. \n");
     433           0 :             ret = AVERROR_INVALIDDATA;
     434           0 :             goto error;
     435             :         }
     436        1670 :         codebook_setup->maxdepth = 0;
     437      371193 :         for (t = 0; t < entries; ++t)
     438      369523 :             if (tmp_vlc_bits[t] >= codebook_setup->maxdepth)
     439       94308 :                 codebook_setup->maxdepth = tmp_vlc_bits[t];
     440             : 
     441        1670 :         if (codebook_setup->maxdepth > 3 * V_NB_BITS)
     442           0 :             codebook_setup->nb_bits = V_NB_BITS2;
     443             :         else
     444        1670 :             codebook_setup->nb_bits = V_NB_BITS;
     445             : 
     446        1670 :         codebook_setup->maxdepth = (codebook_setup->maxdepth+codebook_setup->nb_bits - 1) / codebook_setup->nb_bits;
     447             : 
     448        1670 :         if ((ret = init_vlc(&codebook_setup->vlc, codebook_setup->nb_bits,
     449             :                             entries, tmp_vlc_bits, sizeof(*tmp_vlc_bits),
     450             :                             sizeof(*tmp_vlc_bits), tmp_vlc_codes,
     451             :                             sizeof(*tmp_vlc_codes), sizeof(*tmp_vlc_codes),
     452             :                             INIT_VLC_LE))) {
     453           0 :             av_log(vc->avctx, AV_LOG_ERROR, " Error generating vlc tables. \n");
     454           0 :             goto error;
     455             :         }
     456             :     }
     457             : 
     458          55 :     av_free(tmp_vlc_bits);
     459          55 :     av_free(tmp_vlc_codes);
     460          55 :     av_free(codebook_multiplicands);
     461          55 :     return 0;
     462             : 
     463             : // Error:
     464           0 : error:
     465           0 :     av_free(tmp_vlc_bits);
     466           0 :     av_free(tmp_vlc_codes);
     467           0 :     av_free(codebook_multiplicands);
     468           0 :     return ret;
     469             : }
     470             : 
     471             : // Process time domain transforms part (unused in Vorbis I)
     472             : 
     473          55 : static int vorbis_parse_setup_hdr_tdtransforms(vorbis_context *vc)
     474             : {
     475          55 :     GetBitContext *gb = &vc->gb;
     476          55 :     unsigned i, vorbis_time_count = get_bits(gb, 6) + 1;
     477             : 
     478         110 :     for (i = 0; i < vorbis_time_count; ++i) {
     479          55 :         unsigned vorbis_tdtransform = get_bits(gb, 16);
     480             : 
     481             :         ff_dlog(NULL, " Vorbis time domain transform %u: %u\n",
     482             :                 vorbis_time_count, vorbis_tdtransform);
     483             : 
     484          55 :         if (vorbis_tdtransform) {
     485           0 :             av_log(vc->avctx, AV_LOG_ERROR, "Vorbis time domain transform data nonzero. \n");
     486           0 :             return AVERROR_INVALIDDATA;
     487             :         }
     488             :     }
     489          55 :     return 0;
     490             : }
     491             : 
     492             : // Process floors part
     493             : 
     494             : static int vorbis_floor0_decode(vorbis_context *vc,
     495             :                                 vorbis_floor_data *vfu, float *vec);
     496             : static int create_map(vorbis_context *vc, unsigned floor_number);
     497             : static int vorbis_floor1_decode(vorbis_context *vc,
     498             :                                 vorbis_floor_data *vfu, float *vec);
     499          55 : static int vorbis_parse_setup_hdr_floors(vorbis_context *vc)
     500             : {
     501          55 :     GetBitContext *gb = &vc->gb;
     502             :     int i, j, k, ret;
     503             : 
     504          55 :     vc->floor_count = get_bits(gb, 6) + 1;
     505             : 
     506          55 :     vc->floors = av_mallocz(vc->floor_count * sizeof(*vc->floors));
     507          55 :     if (!vc->floors)
     508           0 :         return AVERROR(ENOMEM);
     509             : 
     510         165 :     for (i = 0; i < vc->floor_count; ++i) {
     511         110 :         vorbis_floor *floor_setup = &vc->floors[i];
     512             : 
     513         110 :         floor_setup->floor_type = get_bits(gb, 16);
     514             : 
     515             :         ff_dlog(NULL, " %d. floor type %d \n", i, floor_setup->floor_type);
     516             : 
     517         110 :         if (floor_setup->floor_type == 1) {
     518          66 :             int maximum_class = -1;
     519          66 :             unsigned rangebits, rangemax, floor1_values = 2;
     520             : 
     521          66 :             floor_setup->decode = vorbis_floor1_decode;
     522             : 
     523          66 :             floor_setup->data.t1.partitions = get_bits(gb, 5);
     524             : 
     525             :             ff_dlog(NULL, " %d.floor: %d partitions \n",
     526             :                     i, floor_setup->data.t1.partitions);
     527             : 
     528         462 :             for (j = 0; j < floor_setup->data.t1.partitions; ++j) {
     529         396 :                 floor_setup->data.t1.partition_class[j] = get_bits(gb, 4);
     530         396 :                 if (floor_setup->data.t1.partition_class[j] > maximum_class)
     531         247 :                     maximum_class = floor_setup->data.t1.partition_class[j];
     532             : 
     533             :                 ff_dlog(NULL, " %d. floor %d partition class %d \n",
     534             :                         i, j, floor_setup->data.t1.partition_class[j]);
     535             : 
     536             :             }
     537             : 
     538             :             ff_dlog(NULL, " maximum class %d \n", maximum_class);
     539             : 
     540         313 :             for (j = 0; j <= maximum_class; ++j) {
     541         247 :                 floor_setup->data.t1.class_dimensions[j] = get_bits(gb, 3) + 1;
     542         247 :                 floor_setup->data.t1.class_subclasses[j] = get_bits(gb, 2);
     543             : 
     544             :                 ff_dlog(NULL, " %d floor %d class dim: %d subclasses %d \n", i, j,
     545             :                         floor_setup->data.t1.class_dimensions[j],
     546             :                         floor_setup->data.t1.class_subclasses[j]);
     547             : 
     548         247 :                 if (floor_setup->data.t1.class_subclasses[j]) {
     549         203 :                     GET_VALIDATED_INDEX(floor_setup->data.t1.class_masterbook[j], 8, vc->codebook_count)
     550             : 
     551             :                     ff_dlog(NULL, "   masterbook: %d \n", floor_setup->data.t1.class_masterbook[j]);
     552             :                 }
     553             : 
     554         949 :                 for (k = 0; k < (1 << floor_setup->data.t1.class_subclasses[j]); ++k) {
     555         702 :                     int16_t bits = get_bits(gb, 8) - 1;
     556         702 :                     if (bits != -1)
     557         578 :                         VALIDATE_INDEX(bits, vc->codebook_count)
     558         702 :                     floor_setup->data.t1.subclass_books[j][k] = bits;
     559             : 
     560             :                     ff_dlog(NULL, "    book %d. : %d \n", k, floor_setup->data.t1.subclass_books[j][k]);
     561             :                 }
     562             :             }
     563             : 
     564          66 :             floor_setup->data.t1.multiplier = get_bits(gb, 2) + 1;
     565          66 :             floor_setup->data.t1.x_list_dim = 2;
     566             : 
     567         462 :             for (j = 0; j < floor_setup->data.t1.partitions; ++j)
     568         396 :                 floor_setup->data.t1.x_list_dim+=floor_setup->data.t1.class_dimensions[floor_setup->data.t1.partition_class[j]];
     569             : 
     570          66 :             floor_setup->data.t1.list = av_mallocz_array(floor_setup->data.t1.x_list_dim,
     571             :                                                    sizeof(*floor_setup->data.t1.list));
     572          66 :             if (!floor_setup->data.t1.list)
     573           0 :                 return AVERROR(ENOMEM);
     574             : 
     575          66 :             rangebits = get_bits(gb, 4);
     576          66 :             if (!rangebits && floor_setup->data.t1.partitions) {
     577           0 :                 av_log(vc->avctx, AV_LOG_ERROR,
     578             :                        "A rangebits value of 0 is not compliant with the Vorbis I specification.\n");
     579           0 :                 return AVERROR_INVALIDDATA;
     580             :             }
     581          66 :             rangemax = (1 << rangebits);
     582          66 :             if (rangemax > vc->blocksize[1] / 2) {
     583           0 :                 av_log(vc->avctx, AV_LOG_ERROR,
     584             :                        "Floor value is too large for blocksize: %u (%"PRIu32")\n",
     585           0 :                        rangemax, vc->blocksize[1] / 2);
     586           0 :                 return AVERROR_INVALIDDATA;
     587             :             }
     588          66 :             floor_setup->data.t1.list[0].x = 0;
     589          66 :             floor_setup->data.t1.list[1].x = rangemax;
     590             : 
     591         462 :             for (j = 0; j < floor_setup->data.t1.partitions; ++j) {
     592        1654 :                 for (k = 0; k < floor_setup->data.t1.class_dimensions[floor_setup->data.t1.partition_class[j]]; ++k, ++floor1_values) {
     593        1258 :                     floor_setup->data.t1.list[floor1_values].x = get_bits(gb, rangebits);
     594             : 
     595             :                     ff_dlog(NULL, " %u. floor1 Y coord. %d\n", floor1_values,
     596             :                             floor_setup->data.t1.list[floor1_values].x);
     597             :                 }
     598             :             }
     599             : 
     600             : // Precalculate order of x coordinates - needed for decode
     601          66 :             if (ff_vorbis_ready_floor1_list(vc->avctx,
     602             :                                             floor_setup->data.t1.list,
     603          66 :                                             floor_setup->data.t1.x_list_dim)) {
     604           0 :                 return AVERROR_INVALIDDATA;
     605             :             }
     606          44 :         } else if (floor_setup->floor_type == 0) {
     607          44 :             unsigned max_codebook_dim = 0;
     608             : 
     609          44 :             floor_setup->decode = vorbis_floor0_decode;
     610             : 
     611          44 :             floor_setup->data.t0.order          = get_bits(gb,  8);
     612          44 :             if (!floor_setup->data.t0.order) {
     613           0 :                 av_log(vc->avctx, AV_LOG_ERROR, "Floor 0 order is 0.\n");
     614           0 :                 return AVERROR_INVALIDDATA;
     615             :             }
     616          44 :             floor_setup->data.t0.rate           = get_bits(gb, 16);
     617          44 :             if (!floor_setup->data.t0.rate) {
     618           0 :                 av_log(vc->avctx, AV_LOG_ERROR, "Floor 0 rate is 0.\n");
     619           0 :                 return AVERROR_INVALIDDATA;
     620             :             }
     621          44 :             floor_setup->data.t0.bark_map_size  = get_bits(gb, 16);
     622          44 :             if (!floor_setup->data.t0.bark_map_size) {
     623           0 :                 av_log(vc->avctx, AV_LOG_ERROR,
     624             :                        "Floor 0 bark map size is 0.\n");
     625           0 :                 return AVERROR_INVALIDDATA;
     626             :             }
     627          44 :             floor_setup->data.t0.amplitude_bits = get_bits(gb,  6);
     628          44 :             floor_setup->data.t0.amplitude_offset = get_bits(gb, 8);
     629          44 :             floor_setup->data.t0.num_books        = get_bits(gb, 4) + 1;
     630             : 
     631             :             /* allocate mem for booklist */
     632          44 :             floor_setup->data.t0.book_list =
     633          44 :                 av_malloc(floor_setup->data.t0.num_books);
     634          44 :             if (!floor_setup->data.t0.book_list)
     635           0 :                 return AVERROR(ENOMEM);
     636             :             /* read book indexes */
     637             :             {
     638             :                 int idx;
     639             :                 unsigned book_idx;
     640         112 :                 for (idx = 0; idx < floor_setup->data.t0.num_books; ++idx) {
     641          68 :                     GET_VALIDATED_INDEX(book_idx, 8, vc->codebook_count)
     642          68 :                     floor_setup->data.t0.book_list[idx] = book_idx;
     643          68 :                     if (vc->codebooks[book_idx].dimensions > max_codebook_dim)
     644          68 :                         max_codebook_dim = vc->codebooks[book_idx].dimensions;
     645             :                 }
     646             :             }
     647             : 
     648          44 :             if ((ret = create_map(vc, i)) < 0)
     649           0 :                 return ret;
     650             : 
     651             :             /* codebook dim is for padding if codebook dim doesn't *
     652             :              * divide order+1 then we need to read more data       */
     653          44 :             floor_setup->data.t0.lsp =
     654          44 :                 av_malloc_array((floor_setup->data.t0.order + 1 + max_codebook_dim),
     655             :                                 sizeof(*floor_setup->data.t0.lsp));
     656          44 :             if (!floor_setup->data.t0.lsp)
     657           0 :                 return AVERROR(ENOMEM);
     658             : 
     659             :             /* debug output parsed headers */
     660             :             ff_dlog(NULL, "floor0 order: %u\n", floor_setup->data.t0.order);
     661             :             ff_dlog(NULL, "floor0 rate: %u\n", floor_setup->data.t0.rate);
     662             :             ff_dlog(NULL, "floor0 bark map size: %u\n",
     663             :                     floor_setup->data.t0.bark_map_size);
     664             :             ff_dlog(NULL, "floor0 amplitude bits: %u\n",
     665             :                     floor_setup->data.t0.amplitude_bits);
     666             :             ff_dlog(NULL, "floor0 amplitude offset: %u\n",
     667             :                     floor_setup->data.t0.amplitude_offset);
     668             :             ff_dlog(NULL, "floor0 number of books: %u\n",
     669             :                     floor_setup->data.t0.num_books);
     670             :             ff_dlog(NULL, "floor0 book list pointer: %p\n",
     671             :                     floor_setup->data.t0.book_list);
     672             :             {
     673             :                 int idx;
     674          44 :                 for (idx = 0; idx < floor_setup->data.t0.num_books; ++idx) {
     675             :                     ff_dlog(NULL, "  Book %d: %u\n", idx + 1,
     676             :                             floor_setup->data.t0.book_list[idx]);
     677             :                 }
     678             :             }
     679             :         } else {
     680           0 :             av_log(vc->avctx, AV_LOG_ERROR, "Invalid floor type!\n");
     681           0 :             return AVERROR_INVALIDDATA;
     682             :         }
     683             :     }
     684          55 :     return 0;
     685             : }
     686             : 
     687             : // Process residues part
     688             : 
     689          55 : static int vorbis_parse_setup_hdr_residues(vorbis_context *vc)
     690             : {
     691          55 :     GetBitContext *gb = &vc->gb;
     692             :     unsigned i, j, k;
     693             : 
     694          55 :     vc->residue_count = get_bits(gb, 6)+1;
     695          55 :     vc->residues      = av_mallocz(vc->residue_count * sizeof(*vc->residues));
     696          55 :     if (!vc->residues)
     697           0 :         return AVERROR(ENOMEM);
     698             : 
     699             :     ff_dlog(NULL, " There are %d residues. \n", vc->residue_count);
     700             : 
     701         330 :     for (i = 0; i < vc->residue_count; ++i) {
     702         110 :         vorbis_residue *res_setup = &vc->residues[i];
     703             :         uint8_t cascade[64];
     704             :         unsigned high_bits, low_bits;
     705             : 
     706         110 :         res_setup->type = get_bits(gb, 16);
     707             : 
     708             :         ff_dlog(NULL, " %u. residue type %d\n", i, res_setup->type);
     709             : 
     710         110 :         res_setup->begin          = get_bits(gb, 24);
     711         110 :         res_setup->end            = get_bits(gb, 24);
     712         110 :         res_setup->partition_size = get_bits(gb, 24) + 1;
     713             :         /* Validations to prevent a buffer overflow later. */
     714         220 :         if (res_setup->begin>res_setup->end ||
     715         110 :             (res_setup->end-res_setup->begin) / res_setup->partition_size > FFMIN(V_MAX_PARTITIONS, 65535)) {
     716           0 :             av_log(vc->avctx, AV_LOG_ERROR,
     717             :                    "partition out of bounds: type, begin, end, size, blocksize: %"PRIu16", %"PRIu32", %"PRIu32", %u, %"PRIu32"\n",
     718           0 :                    res_setup->type, res_setup->begin, res_setup->end,
     719           0 :                    res_setup->partition_size, vc->blocksize[1] / 2);
     720           0 :             return AVERROR_INVALIDDATA;
     721             :         }
     722             : 
     723         110 :         res_setup->classifications = get_bits(gb, 6) + 1;
     724         110 :         GET_VALIDATED_INDEX(res_setup->classbook, 8, vc->codebook_count)
     725             : 
     726         110 :         res_setup->ptns_to_read =
     727         110 :             (res_setup->end - res_setup->begin) / res_setup->partition_size;
     728         110 :         res_setup->classifs = av_malloc_array(res_setup->ptns_to_read,
     729         110 :                                         vc->audio_channels *
     730             :                                         sizeof(*res_setup->classifs));
     731         110 :         if (!res_setup->classifs)
     732           0 :             return AVERROR(ENOMEM);
     733             : 
     734             :         ff_dlog(NULL, "    begin %"PRIu32" end %"PRIu32" part.size %u classif.s %"PRIu8" classbook %"PRIu8"\n",
     735             :                 res_setup->begin, res_setup->end, res_setup->partition_size,
     736             :                 res_setup->classifications, res_setup->classbook);
     737             : 
     738        1066 :         for (j = 0; j < res_setup->classifications; ++j) {
     739         956 :             high_bits = 0;
     740         956 :             low_bits  = get_bits(gb, 3);
     741         956 :             if (get_bits1(gb))
     742           4 :                 high_bits = get_bits(gb, 5);
     743         956 :             cascade[j] = (high_bits << 3) + low_bits;
     744             : 
     745             :             ff_dlog(NULL, "     %u class cascade depth: %d\n", j, ilog(cascade[j]));
     746             :         }
     747             : 
     748         110 :         res_setup->maxpass = 0;
     749        1066 :         for (j = 0; j < res_setup->classifications; ++j) {
     750        8604 :             for (k = 0; k < 8; ++k) {
     751        7648 :                 if (cascade[j]&(1 << k)) {
     752        1106 :                     GET_VALIDATED_INDEX(res_setup->books[j][k], 8, vc->codebook_count)
     753             : 
     754             :                     ff_dlog(NULL, "     %u class cascade depth %u book: %d\n",
     755             :                             j, k, res_setup->books[j][k]);
     756             : 
     757        1106 :                     if (k>res_setup->maxpass)
     758          84 :                         res_setup->maxpass = k;
     759             :                 } else {
     760        6542 :                     res_setup->books[j][k] = -1;
     761             :                 }
     762             :             }
     763             :         }
     764             :     }
     765          55 :     return 0;
     766             : }
     767             : 
     768             : // Process mappings part
     769             : 
     770          55 : static int vorbis_parse_setup_hdr_mappings(vorbis_context *vc)
     771             : {
     772          55 :     GetBitContext *gb = &vc->gb;
     773             :     unsigned i, j;
     774             : 
     775          55 :     vc->mapping_count = get_bits(gb, 6)+1;
     776          55 :     vc->mappings      = av_mallocz(vc->mapping_count * sizeof(*vc->mappings));
     777          55 :     if (!vc->mappings)
     778           0 :         return AVERROR(ENOMEM);
     779             : 
     780             :     ff_dlog(NULL, " There are %d mappings. \n", vc->mapping_count);
     781             : 
     782         163 :     for (i = 0; i < vc->mapping_count; ++i) {
     783         108 :         vorbis_mapping *mapping_setup = &vc->mappings[i];
     784             : 
     785         108 :         if (get_bits(gb, 16)) {
     786           0 :             av_log(vc->avctx, AV_LOG_ERROR, "Other mappings than type 0 are not compliant with the Vorbis I specification. \n");
     787           0 :             return AVERROR_INVALIDDATA;
     788             :         }
     789         108 :         if (get_bits1(gb)) {
     790           4 :             mapping_setup->submaps = get_bits(gb, 4) + 1;
     791             :         } else {
     792         104 :             mapping_setup->submaps = 1;
     793             :         }
     794             : 
     795         108 :         if (get_bits1(gb)) {
     796          44 :             mapping_setup->coupling_steps = get_bits(gb, 8) + 1;
     797          44 :             if (vc->audio_channels < 2) {
     798           0 :                 av_log(vc->avctx, AV_LOG_ERROR,
     799             :                        "Square polar channel mapping with less than two channels is not compliant with the Vorbis I specification.\n");
     800           0 :                 return AVERROR_INVALIDDATA;
     801             :             }
     802          44 :             mapping_setup->magnitude      = av_mallocz(mapping_setup->coupling_steps *
     803             :                                                        sizeof(*mapping_setup->magnitude));
     804          44 :             mapping_setup->angle          = av_mallocz(mapping_setup->coupling_steps *
     805             :                                                        sizeof(*mapping_setup->angle));
     806          44 :             if (!mapping_setup->angle || !mapping_setup->magnitude)
     807           0 :                 return AVERROR(ENOMEM);
     808             : 
     809         100 :             for (j = 0; j < mapping_setup->coupling_steps; ++j) {
     810          56 :                 GET_VALIDATED_INDEX(mapping_setup->magnitude[j], ilog(vc->audio_channels - 1), vc->audio_channels)
     811          56 :                 GET_VALIDATED_INDEX(mapping_setup->angle[j],     ilog(vc->audio_channels - 1), vc->audio_channels)
     812             :             }
     813             :         } else {
     814          64 :             mapping_setup->coupling_steps = 0;
     815             :         }
     816             : 
     817             :         ff_dlog(NULL, "   %u mapping coupling steps: %d\n",
     818             :                 i, mapping_setup->coupling_steps);
     819             : 
     820         108 :         if (get_bits(gb, 2)) {
     821           0 :             av_log(vc->avctx, AV_LOG_ERROR, "%u. mapping setup data invalid.\n", i);
     822           0 :             return AVERROR_INVALIDDATA; // following spec.
     823             :         }
     824             : 
     825         108 :         if (mapping_setup->submaps>1) {
     826           4 :             mapping_setup->mux = av_mallocz_array(vc->audio_channels,
     827             :                                             sizeof(*mapping_setup->mux));
     828           4 :             if (!mapping_setup->mux)
     829           0 :                 return AVERROR(ENOMEM);
     830             : 
     831          28 :             for (j = 0; j < vc->audio_channels; ++j)
     832          24 :                 mapping_setup->mux[j] = get_bits(gb, 4);
     833             :         }
     834             : 
     835         220 :         for (j = 0; j < mapping_setup->submaps; ++j) {
     836         112 :             skip_bits(gb, 8); // FIXME check?
     837         112 :             GET_VALIDATED_INDEX(mapping_setup->submap_floor[j],   8, vc->floor_count)
     838         112 :             GET_VALIDATED_INDEX(mapping_setup->submap_residue[j], 8, vc->residue_count)
     839             : 
     840             :             ff_dlog(NULL, "   %u mapping %u submap : floor %d, residue %d\n", i, j,
     841             :                     mapping_setup->submap_floor[j],
     842             :                     mapping_setup->submap_residue[j]);
     843             :         }
     844             :     }
     845          55 :     return 0;
     846             : }
     847             : 
     848             : // Process modes part
     849             : 
     850          44 : static int create_map(vorbis_context *vc, unsigned floor_number)
     851             : {
     852          44 :     vorbis_floor *floors = vc->floors;
     853             :     vorbis_floor0 *vf;
     854             :     int idx;
     855             :     int blockflag, n;
     856             :     int32_t *map;
     857             : 
     858         132 :     for (blockflag = 0; blockflag < 2; ++blockflag) {
     859          88 :         n = vc->blocksize[blockflag] / 2;
     860         176 :         floors[floor_number].data.t0.map[blockflag] =
     861         176 :             av_malloc_array(n + 1, sizeof(int32_t)); // n + sentinel
     862          88 :         if (!floors[floor_number].data.t0.map[blockflag])
     863           0 :             return AVERROR(ENOMEM);
     864             : 
     865          88 :         map =  floors[floor_number].data.t0.map[blockflag];
     866          88 :         vf  = &floors[floor_number].data.t0;
     867             : 
     868       51288 :         for (idx = 0; idx < n; ++idx) {
     869      102400 :             map[idx] = floor(BARK((vf->rate * idx) / (2.0f * n)) *
     870       51200 :                              (vf->bark_map_size / BARK(vf->rate / 2.0f)));
     871       51200 :             if (vf->bark_map_size-1 < map[idx])
     872           0 :                 map[idx] = vf->bark_map_size - 1;
     873             :         }
     874          88 :         map[n] = -1;
     875          88 :         vf->map_size[blockflag] = n;
     876             :     }
     877             : 
     878          44 :     for (idx = 0; idx <= n; ++idx) {
     879             :         ff_dlog(NULL, "floor0 map: map at pos %d is %"PRId32"\n", idx, map[idx]);
     880             :     }
     881             : 
     882          44 :     return 0;
     883             : }
     884             : 
     885          55 : static int vorbis_parse_setup_hdr_modes(vorbis_context *vc)
     886             : {
     887          55 :     GetBitContext *gb = &vc->gb;
     888             :     unsigned i;
     889             : 
     890          55 :     vc->mode_count = get_bits(gb, 6) + 1;
     891          55 :     vc->modes      = av_mallocz(vc->mode_count * sizeof(*vc->modes));
     892          55 :     if (!vc->modes)
     893           0 :         return AVERROR(ENOMEM);
     894             : 
     895             :     ff_dlog(NULL, " There are %d modes.\n", vc->mode_count);
     896             : 
     897         165 :     for (i = 0; i < vc->mode_count; ++i) {
     898         110 :         vorbis_mode *mode_setup = &vc->modes[i];
     899             : 
     900         110 :         mode_setup->blockflag     = get_bits1(gb);
     901         110 :         mode_setup->windowtype    = get_bits(gb, 16); //FIXME check
     902         110 :         mode_setup->transformtype = get_bits(gb, 16); //FIXME check
     903         110 :         GET_VALIDATED_INDEX(mode_setup->mapping, 8, vc->mapping_count);
     904             : 
     905             :         ff_dlog(NULL, " %u mode: blockflag %d, windowtype %d, transformtype %d, mapping %d\n",
     906             :                 i, mode_setup->blockflag, mode_setup->windowtype,
     907             :                 mode_setup->transformtype, mode_setup->mapping);
     908             :     }
     909          55 :     return 0;
     910             : }
     911             : 
     912             : // Process the whole setup header using the functions above
     913             : 
     914          55 : static int vorbis_parse_setup_hdr(vorbis_context *vc)
     915             : {
     916          55 :     GetBitContext *gb = &vc->gb;
     917             :     int ret;
     918             : 
     919         110 :     if ((get_bits(gb, 8) != 'v') || (get_bits(gb, 8) != 'o') ||
     920         165 :         (get_bits(gb, 8) != 'r') || (get_bits(gb, 8) != 'b') ||
     921         110 :         (get_bits(gb, 8) != 'i') || (get_bits(gb, 8) != 's')) {
     922           0 :         av_log(vc->avctx, AV_LOG_ERROR, " Vorbis setup header packet corrupt (no vorbis signature). \n");
     923           0 :         return AVERROR_INVALIDDATA;
     924             :     }
     925             : 
     926          55 :     if ((ret = vorbis_parse_setup_hdr_codebooks(vc))) {
     927           0 :         av_log(vc->avctx, AV_LOG_ERROR, " Vorbis setup header packet corrupt (codebooks). \n");
     928           0 :         return ret;
     929             :     }
     930          55 :     if ((ret = vorbis_parse_setup_hdr_tdtransforms(vc))) {
     931           0 :         av_log(vc->avctx, AV_LOG_ERROR, " Vorbis setup header packet corrupt (time domain transforms). \n");
     932           0 :         return ret;
     933             :     }
     934          55 :     if ((ret = vorbis_parse_setup_hdr_floors(vc))) {
     935           0 :         av_log(vc->avctx, AV_LOG_ERROR, " Vorbis setup header packet corrupt (floors). \n");
     936           0 :         return ret;
     937             :     }
     938          55 :     if ((ret = vorbis_parse_setup_hdr_residues(vc))) {
     939           0 :         av_log(vc->avctx, AV_LOG_ERROR, " Vorbis setup header packet corrupt (residues). \n");
     940           0 :         return ret;
     941             :     }
     942          55 :     if ((ret = vorbis_parse_setup_hdr_mappings(vc))) {
     943           0 :         av_log(vc->avctx, AV_LOG_ERROR, " Vorbis setup header packet corrupt (mappings). \n");
     944           0 :         return ret;
     945             :     }
     946          55 :     if ((ret = vorbis_parse_setup_hdr_modes(vc))) {
     947           0 :         av_log(vc->avctx, AV_LOG_ERROR, " Vorbis setup header packet corrupt (modes). \n");
     948           0 :         return ret;
     949             :     }
     950          55 :     if (!get_bits1(gb)) {
     951           0 :         av_log(vc->avctx, AV_LOG_ERROR, " Vorbis setup header packet corrupt (framing flag). \n");
     952           0 :         return AVERROR_INVALIDDATA; // framing flag bit unset error
     953             :     }
     954             : 
     955          55 :     return 0;
     956             : }
     957             : 
     958             : // Process the identification header
     959             : 
     960          55 : static int vorbis_parse_id_hdr(vorbis_context *vc)
     961             : {
     962          55 :     GetBitContext *gb = &vc->gb;
     963             :     unsigned bl0, bl1;
     964             : 
     965         110 :     if ((get_bits(gb, 8) != 'v') || (get_bits(gb, 8) != 'o') ||
     966         165 :         (get_bits(gb, 8) != 'r') || (get_bits(gb, 8) != 'b') ||
     967         110 :         (get_bits(gb, 8) != 'i') || (get_bits(gb, 8) != 's')) {
     968           0 :         av_log(vc->avctx, AV_LOG_ERROR, " Vorbis id header packet corrupt (no vorbis signature). \n");
     969           0 :         return AVERROR_INVALIDDATA;
     970             :     }
     971             : 
     972          55 :     vc->version        = get_bits_long(gb, 32);    //FIXME check 0
     973          55 :     vc->audio_channels = get_bits(gb, 8);
     974          55 :     if (vc->audio_channels <= 0) {
     975           0 :         av_log(vc->avctx, AV_LOG_ERROR, "Invalid number of channels\n");
     976           0 :         return AVERROR_INVALIDDATA;
     977             :     }
     978          55 :     vc->audio_samplerate = get_bits_long(gb, 32);
     979          55 :     if (vc->audio_samplerate <= 0) {
     980           0 :         av_log(vc->avctx, AV_LOG_ERROR, "Invalid samplerate\n");
     981           0 :         return AVERROR_INVALIDDATA;
     982             :     }
     983          55 :     vc->bitrate_maximum = get_bits_long(gb, 32);
     984          55 :     vc->bitrate_nominal = get_bits_long(gb, 32);
     985          55 :     vc->bitrate_minimum = get_bits_long(gb, 32);
     986          55 :     bl0 = get_bits(gb, 4);
     987          55 :     bl1 = get_bits(gb, 4);
     988          55 :     if (bl0 > 13 || bl0 < 6 || bl1 > 13 || bl1 < 6 || bl1 < bl0) {
     989           0 :         av_log(vc->avctx, AV_LOG_ERROR, " Vorbis id header packet corrupt (illegal blocksize). \n");
     990           0 :         return AVERROR_INVALIDDATA;
     991             :     }
     992          55 :     vc->blocksize[0] = (1 << bl0);
     993          55 :     vc->blocksize[1] = (1 << bl1);
     994          55 :     vc->win[0] = ff_vorbis_vwin[bl0 - 6];
     995          55 :     vc->win[1] = ff_vorbis_vwin[bl1 - 6];
     996             : 
     997          55 :     if ((get_bits1(gb)) == 0) {
     998           0 :         av_log(vc->avctx, AV_LOG_ERROR, " Vorbis id header packet corrupt (framing flag not set). \n");
     999           0 :         return AVERROR_INVALIDDATA;
    1000             :     }
    1001             : 
    1002          55 :     vc->channel_residues =  av_malloc_array(vc->blocksize[1]  / 2, vc->audio_channels * sizeof(*vc->channel_residues));
    1003          55 :     vc->saved            =  av_mallocz_array(vc->blocksize[1] / 4, vc->audio_channels * sizeof(*vc->saved));
    1004          55 :     if (!vc->channel_residues || !vc->saved)
    1005           0 :         return AVERROR(ENOMEM);
    1006             : 
    1007          55 :     vc->previous_window  = -1;
    1008             : 
    1009          55 :     ff_mdct_init(&vc->mdct[0], bl0, 1, -1.0);
    1010          55 :     ff_mdct_init(&vc->mdct[1], bl1, 1, -1.0);
    1011          55 :     vc->fdsp = avpriv_float_dsp_alloc(vc->avctx->flags & AV_CODEC_FLAG_BITEXACT);
    1012          55 :     if (!vc->fdsp)
    1013           0 :         return AVERROR(ENOMEM);
    1014             : 
    1015             :     ff_dlog(NULL, " vorbis version %"PRIu32" \n audio_channels %"PRIu8" \n audio_samplerate %"PRIu32" \n bitrate_max %"PRIu32" \n bitrate_nom %"PRIu32" \n bitrate_min %"PRIu32" \n blk_0 %"PRIu32" blk_1 %"PRIu32" \n ",
    1016             :             vc->version, vc->audio_channels, vc->audio_samplerate, vc->bitrate_maximum, vc->bitrate_nominal, vc->bitrate_minimum, vc->blocksize[0], vc->blocksize[1]);
    1017             : 
    1018             : /*
    1019             :     BLK = vc->blocksize[0];
    1020             :     for (i = 0; i < BLK / 2; ++i) {
    1021             :         vc->win[0][i] = sin(0.5*3.14159265358*(sin(((float)i + 0.5) / (float)BLK*3.14159265358))*(sin(((float)i + 0.5) / (float)BLK*3.14159265358)));
    1022             :     }
    1023             : */
    1024             : 
    1025          55 :     return 0;
    1026             : }
    1027             : 
    1028             : // Process the extradata using the functions above (identification header, setup header)
    1029             : 
    1030          55 : static av_cold int vorbis_decode_init(AVCodecContext *avctx)
    1031             : {
    1032          55 :     vorbis_context *vc = avctx->priv_data;
    1033          55 :     uint8_t *headers   = avctx->extradata;
    1034          55 :     int headers_len    = avctx->extradata_size;
    1035             :     const uint8_t *header_start[3];
    1036             :     int header_len[3];
    1037          55 :     GetBitContext *gb = &vc->gb;
    1038             :     int hdr_type, ret;
    1039             : 
    1040          55 :     vc->avctx = avctx;
    1041          55 :     ff_vorbisdsp_init(&vc->dsp);
    1042             : 
    1043          55 :     avctx->sample_fmt = AV_SAMPLE_FMT_FLTP;
    1044             : 
    1045          55 :     if (!headers_len) {
    1046           0 :         av_log(avctx, AV_LOG_ERROR, "Extradata missing.\n");
    1047           0 :         return AVERROR_INVALIDDATA;
    1048             :     }
    1049             : 
    1050          55 :     if ((ret = avpriv_split_xiph_headers(headers, headers_len, 30, header_start, header_len)) < 0) {
    1051           0 :         av_log(avctx, AV_LOG_ERROR, "Extradata corrupt.\n");
    1052           0 :         return ret;
    1053             :     }
    1054             : 
    1055          55 :     init_get_bits(gb, header_start[0], header_len[0]*8);
    1056          55 :     hdr_type = get_bits(gb, 8);
    1057          55 :     if (hdr_type != 1) {
    1058           0 :         av_log(avctx, AV_LOG_ERROR, "First header is not the id header.\n");
    1059           0 :         return AVERROR_INVALIDDATA;
    1060             :     }
    1061          55 :     if ((ret = vorbis_parse_id_hdr(vc))) {
    1062           0 :         av_log(avctx, AV_LOG_ERROR, "Id header corrupt.\n");
    1063           0 :         vorbis_free(vc);
    1064           0 :         return ret;
    1065             :     }
    1066             : 
    1067          55 :     init_get_bits(gb, header_start[2], header_len[2]*8);
    1068          55 :     hdr_type = get_bits(gb, 8);
    1069          55 :     if (hdr_type != 5) {
    1070           0 :         av_log(avctx, AV_LOG_ERROR, "Third header is not the setup header.\n");
    1071           0 :         vorbis_free(vc);
    1072           0 :         return AVERROR_INVALIDDATA;
    1073             :     }
    1074          55 :     if ((ret = vorbis_parse_setup_hdr(vc))) {
    1075           0 :         av_log(avctx, AV_LOG_ERROR, "Setup header corrupt.\n");
    1076           0 :         vorbis_free(vc);
    1077           0 :         return ret;
    1078             :     }
    1079             : 
    1080          55 :     if (vc->audio_channels > 8)
    1081           0 :         avctx->channel_layout = 0;
    1082             :     else
    1083          55 :         avctx->channel_layout = ff_vorbis_channel_layouts[vc->audio_channels - 1];
    1084             : 
    1085          55 :     avctx->channels    = vc->audio_channels;
    1086          55 :     avctx->sample_rate = vc->audio_samplerate;
    1087             : 
    1088          55 :     return 0;
    1089             : }
    1090             : 
    1091             : // Decode audiopackets -------------------------------------------------
    1092             : 
    1093             : // Read and decode floor
    1094             : 
    1095        6352 : static int vorbis_floor0_decode(vorbis_context *vc,
    1096             :                                 vorbis_floor_data *vfu, float *vec)
    1097             : {
    1098        6352 :     vorbis_floor0 *vf = &vfu->t0;
    1099        6352 :     float *lsp = vf->lsp;
    1100             :     unsigned amplitude, book_idx;
    1101        6352 :     unsigned blockflag = vc->modes[vc->mode_number].blockflag;
    1102             : 
    1103        6352 :     if (!vf->amplitude_bits)
    1104           0 :         return 1;
    1105             : 
    1106        6352 :     amplitude = get_bits(&vc->gb, vf->amplitude_bits);
    1107        6352 :     if (amplitude > 0) {
    1108        6241 :         float last = 0;
    1109        6241 :         unsigned idx, lsp_len = 0;
    1110             :         vorbis_codebook codebook;
    1111             : 
    1112        6241 :         book_idx = get_bits(&vc->gb, ilog(vf->num_books));
    1113        6241 :         if (book_idx >= vf->num_books) {
    1114           0 :             av_log(vc->avctx, AV_LOG_ERROR, "floor0 dec: booknumber too high!\n");
    1115           0 :             book_idx =  0;
    1116             :         }
    1117             :         ff_dlog(NULL, "floor0 dec: booknumber: %u\n", book_idx);
    1118        6241 :         codebook = vc->codebooks[vf->book_list[book_idx]];
    1119             :         /* Invalid codebook! */
    1120        6241 :         if (!codebook.codevectors)
    1121           0 :             return AVERROR_INVALIDDATA;
    1122             : 
    1123       62792 :         while (lsp_len<vf->order) {
    1124             :             int vec_off;
    1125             : 
    1126             :             ff_dlog(NULL, "floor0 dec: book dimension: %d\n", codebook.dimensions);
    1127             :             ff_dlog(NULL, "floor0 dec: maximum depth: %d\n", codebook.maxdepth);
    1128             :             /* read temp vector */
    1129      150930 :             vec_off = get_vlc2(&vc->gb, codebook.vlc.table,
    1130      100620 :                                codebook.nb_bits, codebook.maxdepth)
    1131       50310 :                       * codebook.dimensions;
    1132             :             ff_dlog(NULL, "floor0 dec: vector offset: %d\n", vec_off);
    1133             :             /* copy each vector component and add last to it */
    1134      195768 :             for (idx = 0; idx < codebook.dimensions; ++idx)
    1135      145458 :                 lsp[lsp_len+idx] = codebook.codevectors[vec_off+idx] + last;
    1136       50310 :             last = lsp[lsp_len+idx-1]; /* set last to last vector component */
    1137             : 
    1138       50310 :             lsp_len += codebook.dimensions;
    1139             :         }
    1140             :         /* DEBUG: output lsp coeffs */
    1141             :         {
    1142             :             int idx;
    1143        6241 :             for (idx = 0; idx < lsp_len; ++idx)
    1144             :                 ff_dlog(NULL, "floor0 dec: coeff at %d is %f\n", idx, lsp[idx]);
    1145             :         }
    1146             : 
    1147             :         /* synthesize floor output vector */
    1148             :         {
    1149             :             int i;
    1150        6241 :             int order = vf->order;
    1151        6241 :             float wstep = M_PI / vf->bark_map_size;
    1152             : 
    1153      151699 :             for (i = 0; i < order; i++)
    1154      145458 :                 lsp[i] = 2.0f * cos(lsp[i]);
    1155             : 
    1156             :             ff_dlog(NULL, "floor0 synth: map_size = %"PRIu32"; m = %d; wstep = %f\n",
    1157             :                     vf->map_size[blockflag], order, wstep);
    1158             : 
    1159        6241 :             i = 0;
    1160      951130 :             while (i < vf->map_size[blockflag]) {
    1161      938648 :                 int j, iter_cond = vf->map[blockflag][i];
    1162      938648 :                 float p = 0.5f;
    1163      938648 :                 float q = 0.5f;
    1164      938648 :                 float two_cos_w = 2.0f * cos(wstep * iter_cond); // needed all times
    1165             : 
    1166             :                 /* similar part for the q and p products */
    1167    14104804 :                 for (j = 0; j + 1 < order; j += 2) {
    1168    13166156 :                     q *= lsp[j]     - two_cos_w;
    1169    13166156 :                     p *= lsp[j + 1] - two_cos_w;
    1170             :                 }
    1171      938648 :                 if (j == order) { // even order
    1172      925080 :                     p *= p * (2.0f - two_cos_w);
    1173      925080 :                     q *= q * (2.0f + two_cos_w);
    1174             :                 } else { // odd order
    1175       13568 :                     q *= two_cos_w-lsp[j]; // one more time for q
    1176             : 
    1177             :                     /* final step and square */
    1178       13568 :                     p *= p * (4.f - two_cos_w * two_cos_w);
    1179       13568 :                     q *= q;
    1180             :                 }
    1181             : 
    1182             :                 /* calculate linear floor value */
    1183     2815944 :                 q = exp((((amplitude*vf->amplitude_offset) /
    1184      938648 :                           (((1 << vf->amplitude_bits) - 1) * sqrt(p + q)))
    1185      938648 :                          - vf->amplitude_offset) * .11512925f);
    1186             : 
    1187             :                 /* fill vector */
    1188             :                 do {
    1189     4382464 :                     vec[i] = q; ++i;
    1190     4382464 :                 } while (vf->map[blockflag][i] == iter_cond);
    1191             :             }
    1192             :         }
    1193             :     } else {
    1194             :         /* this channel is unused */
    1195         111 :         return 1;
    1196             :     }
    1197             : 
    1198             :     ff_dlog(NULL, " Floor0 decoded\n");
    1199             : 
    1200        6241 :     return 0;
    1201             : }
    1202             : 
    1203       11420 : static int vorbis_floor1_decode(vorbis_context *vc,
    1204             :                                 vorbis_floor_data *vfu, float *vec)
    1205             : {
    1206       11420 :     vorbis_floor1 *vf = &vfu->t1;
    1207       11420 :     GetBitContext *gb = &vc->gb;
    1208       11420 :     uint16_t range_v[4] = { 256, 128, 86, 64 };
    1209       11420 :     unsigned range = range_v[vf->multiplier - 1];
    1210             :     uint16_t floor1_Y[258];
    1211             :     uint16_t floor1_Y_final[258];
    1212             :     int floor1_flag[258];
    1213             :     unsigned partition_class, cdim, cbits, csub, cval, offset, i, j;
    1214             :     int book, adx, ady, dy, off, predicted, err;
    1215             : 
    1216             : 
    1217       11420 :     if (!get_bits1(gb)) // silence
    1218        1987 :         return 1;
    1219             : 
    1220             : // Read values (or differences) for the floor's points
    1221             : 
    1222        9433 :     floor1_Y[0] = get_bits(gb, ilog(range - 1));
    1223        9433 :     floor1_Y[1] = get_bits(gb, ilog(range - 1));
    1224             : 
    1225             :     ff_dlog(NULL, "floor 0 Y %d floor 1 Y %d \n", floor1_Y[0], floor1_Y[1]);
    1226             : 
    1227        9433 :     offset = 2;
    1228       78107 :     for (i = 0; i < vf->partitions; ++i) {
    1229       68674 :         partition_class = vf->partition_class[i];
    1230       68674 :         cdim   = vf->class_dimensions[partition_class];
    1231       68674 :         cbits  = vf->class_subclasses[partition_class];
    1232       68674 :         csub = (1 << cbits) - 1;
    1233       68674 :         cval = 0;
    1234             : 
    1235             :         ff_dlog(NULL, "Cbits %u\n", cbits);
    1236             : 
    1237       68674 :         if (cbits) // this reads all subclasses for this partition's class
    1238       62770 :             cval = get_vlc2(gb, vc->codebooks[vf->class_masterbook[partition_class]].vlc.table,
    1239       62770 :                             vc->codebooks[vf->class_masterbook[partition_class]].nb_bits, 3);
    1240             : 
    1241      284750 :         for (j = 0; j < cdim; ++j) {
    1242      216076 :             book = vf->subclass_books[partition_class][cval & csub];
    1243             : 
    1244             :             ff_dlog(NULL, "book %d Cbits %u cval %u  bits:%d\n",
    1245             :                     book, cbits, cval, get_bits_count(gb));
    1246             : 
    1247      216076 :             cval = cval >> cbits;
    1248      216076 :             if (book > -1) {
    1249      113688 :                 int v = get_vlc2(gb, vc->codebooks[book].vlc.table,
    1250      113688 :                                  vc->codebooks[book].nb_bits, 3);
    1251      113688 :                 if (v < 0)
    1252           0 :                     return AVERROR_INVALIDDATA;
    1253      113688 :                 floor1_Y[offset+j] = v;
    1254             :             } else {
    1255      102388 :                 floor1_Y[offset+j] = 0;
    1256             :             }
    1257             : 
    1258             :             ff_dlog(NULL, " floor(%d) = %d \n",
    1259             :                     vf->list[offset+j].x, floor1_Y[offset+j]);
    1260             :         }
    1261       68674 :         offset+=cdim;
    1262             :     }
    1263             : 
    1264             : // Amplitude calculation from the differences
    1265             : 
    1266        9433 :     floor1_flag[0] = 1;
    1267        9433 :     floor1_flag[1] = 1;
    1268        9433 :     floor1_Y_final[0] = floor1_Y[0];
    1269        9433 :     floor1_Y_final[1] = floor1_Y[1];
    1270             : 
    1271      225509 :     for (i = 2; i < vf->x_list_dim; ++i) {
    1272             :         unsigned val, highroom, lowroom, room, high_neigh_offs, low_neigh_offs;
    1273             : 
    1274      216076 :         low_neigh_offs  = vf->list[i].low;
    1275      216076 :         high_neigh_offs = vf->list[i].high;
    1276      216076 :         dy  = floor1_Y_final[high_neigh_offs] - floor1_Y_final[low_neigh_offs];  // render_point begin
    1277      216076 :         adx = vf->list[high_neigh_offs].x - vf->list[low_neigh_offs].x;
    1278      216076 :         ady = FFABS(dy);
    1279      216076 :         err = ady * (vf->list[i].x - vf->list[low_neigh_offs].x);
    1280      216076 :         off = err / adx;
    1281      216076 :         if (dy < 0) {
    1282      119376 :             predicted = floor1_Y_final[low_neigh_offs] - off;
    1283             :         } else {
    1284       96700 :             predicted = floor1_Y_final[low_neigh_offs] + off;
    1285             :         } // render_point end
    1286             : 
    1287      216076 :         val = floor1_Y[i];
    1288      216076 :         highroom = range-predicted;
    1289      216076 :         lowroom  = predicted;
    1290      216076 :         if (highroom < lowroom) {
    1291       87946 :             room = highroom * 2;
    1292             :         } else {
    1293      128130 :             room = lowroom * 2;   // SPEC misspelling
    1294             :         }
    1295      216076 :         if (val) {
    1296       97796 :             floor1_flag[low_neigh_offs]  = 1;
    1297       97796 :             floor1_flag[high_neigh_offs] = 1;
    1298       97796 :             floor1_flag[i]               = 1;
    1299       97796 :             if (val >= room) {
    1300         102 :                 if (highroom > lowroom) {
    1301          74 :                     floor1_Y_final[i] = av_clip_uint16(val - lowroom + predicted);
    1302             :                 } else {
    1303          28 :                     floor1_Y_final[i] = av_clip_uint16(predicted - val + highroom - 1);
    1304             :                 }
    1305             :             } else {
    1306       97694 :                 if (val & 1) {
    1307       63405 :                     floor1_Y_final[i] = av_clip_uint16(predicted - (val + 1) / 2);
    1308             :                 } else {
    1309       34289 :                     floor1_Y_final[i] = av_clip_uint16(predicted + val / 2);
    1310             :                 }
    1311             :             }
    1312             :         } else {
    1313      118280 :             floor1_flag[i]    = 0;
    1314      118280 :             floor1_Y_final[i] = av_clip_uint16(predicted);
    1315             :         }
    1316             : 
    1317             :         ff_dlog(NULL, " Decoded floor(%d) = %u / val %u\n",
    1318             :                 vf->list[i].x, floor1_Y_final[i], val);
    1319             :     }
    1320             : 
    1321             : // Curve synth - connect the calculated dots and convert from dB scale FIXME optimize ?
    1322             : 
    1323        9433 :     ff_vorbis_floor1_render_list(vf->list, vf->x_list_dim, floor1_Y_final, floor1_flag, vf->multiplier, vec, vf->list[1].x);
    1324             : 
    1325             :     ff_dlog(NULL, " Floor decoded\n");
    1326             : 
    1327        9433 :     return 0;
    1328             : }
    1329             : 
    1330      134366 : static av_always_inline int setup_classifs(vorbis_context *vc,
    1331             :                                            vorbis_residue *vr,
    1332             :                                            uint8_t *do_not_decode,
    1333             :                                            unsigned ch_used,
    1334             :                                            int partition_count,
    1335             :                                            int ptns_to_read
    1336             :                                           )
    1337             : {
    1338      134366 :     vorbis_codebook *codebook = vc->codebooks + vr->classbook;
    1339             :     int p, j, i;
    1340      134366 :     unsigned c_p_c         = codebook->dimensions;
    1341      134366 :     unsigned inverse_class = ff_inverse[vr->classifications];
    1342             :     int temp, temp2;
    1343      297962 :     for (p = 0, j = 0; j < ch_used; ++j) {
    1344      163596 :         if (!do_not_decode[j]) {
    1345      162302 :             temp = get_vlc2(&vc->gb, codebook->vlc.table,
    1346      162302 :                                      codebook->nb_bits, 3);
    1347             : 
    1348             :             ff_dlog(NULL, "Classword: %u\n", temp);
    1349             : 
    1350      162302 :             av_assert0(temp < 65536);
    1351             : 
    1352      162302 :             if (temp < 0) {
    1353           0 :                 av_log(vc->avctx, AV_LOG_ERROR,
    1354             :                        "Invalid vlc code decoding %d channel.", j);
    1355           0 :                 return AVERROR_INVALIDDATA;
    1356             :             }
    1357             : 
    1358      162302 :             av_assert0(vr->classifications > 1); //needed for inverse[]
    1359             : 
    1360      505997 :             for (i = partition_count + c_p_c - 1; i >= partition_count; i--) {
    1361      343695 :                 temp2 = (((uint64_t)temp) * inverse_class) >> 32;
    1362             : 
    1363      343695 :                 if (i < ptns_to_read)
    1364      343488 :                     vr->classifs[p + i] = temp - temp2 * vr->classifications;
    1365      343695 :                 temp = temp2;
    1366             :             }
    1367             :         }
    1368      163596 :         p += ptns_to_read;
    1369             :     }
    1370      134366 :     return 0;
    1371             : }
    1372             : // Read and decode residue
    1373             : 
    1374        9458 : static av_always_inline int vorbis_residue_decode_internal(vorbis_context *vc,
    1375             :                                                            vorbis_residue *vr,
    1376             :                                                            unsigned ch,
    1377             :                                                            uint8_t *do_not_decode,
    1378             :                                                            float *vec,
    1379             :                                                            unsigned vlen,
    1380             :                                                            unsigned ch_left,
    1381             :                                                            int vr_type)
    1382             : {
    1383        9458 :     GetBitContext *gb = &vc->gb;
    1384        9458 :     unsigned c_p_c        = vc->codebooks[vr->classbook].dimensions;
    1385        9458 :     uint8_t *classifs = vr->classifs;
    1386             :     unsigned pass, ch_used, i, j, k, l;
    1387        9458 :     unsigned max_output = (ch - 1) * vlen;
    1388        9458 :     int ptns_to_read = vr->ptns_to_read;
    1389        9458 :     int libvorbis_bug = 0;
    1390             : 
    1391        9458 :     if (vr_type == 2) {
    1392        9630 :         for (j = 1; j < ch; ++j)
    1393        5370 :             do_not_decode[0] &= do_not_decode[j];  // FIXME - clobbering input
    1394        4260 :         if (do_not_decode[0])
    1395         117 :             return 0;
    1396        4143 :         ch_used = 1;
    1397        4143 :         max_output += vr->end / ch;
    1398             :     } else {
    1399        5198 :         ch_used = ch;
    1400        5198 :         max_output += vr->end;
    1401             :     }
    1402             : 
    1403        9341 :     if (max_output > ch_left * vlen) {
    1404           0 :         if (max_output <= ch_left * vlen + vr->partition_size*ch_used/ch) {
    1405           0 :             ptns_to_read--;
    1406           0 :             libvorbis_bug = 1;
    1407             :         } else {
    1408           0 :             av_log(vc->avctx, AV_LOG_ERROR, "Insufficient output buffer\n");
    1409           0 :             return AVERROR_INVALIDDATA;
    1410             :         }
    1411             :     }
    1412             : 
    1413             :     ff_dlog(NULL, " residue type 0/1/2 decode begin, ch: %d  cpc %d  \n", ch, c_p_c);
    1414             : 
    1415       30866 :     for (pass = 0; pass <= vr->maxpass; ++pass) { // FIXME OPTIMIZE?
    1416             :         int voffset, partition_count, j_times_ptns_to_read;
    1417             : 
    1418       21525 :         voffset = vr->begin;
    1419      392170 :         for (partition_count = 0; partition_count < ptns_to_read;) {  // SPEC        error
    1420      349120 :             if (!pass) {
    1421      134366 :                 int ret = setup_classifs(vc, vr, do_not_decode, ch_used, partition_count, ptns_to_read);
    1422      134366 :                 if (ret < 0)
    1423           0 :                     return ret;
    1424             :             }
    1425     1082914 :             for (i = 0; (i < c_p_c) && (partition_count < ptns_to_read); ++i) {
    1426     1530064 :                 for (j_times_ptns_to_read = 0, j = 0; j < ch_used; ++j) {
    1427             :                     unsigned voffs;
    1428             : 
    1429      796270 :                     if (!do_not_decode[j]) {
    1430      792332 :                         unsigned vqclass = classifs[j_times_ptns_to_read + partition_count];
    1431      792332 :                         int vqbook  = vr->books[vqclass][pass];
    1432             : 
    1433      792332 :                         if (vqbook >= 0 && vc->codebooks[vqbook].codevectors) {
    1434             :                             unsigned coffs;
    1435      321319 :                             unsigned dim  = vc->codebooks[vqbook].dimensions;
    1436      321319 :                             unsigned step = FASTDIV(vr->partition_size << 1, dim << 1);
    1437      321319 :                             vorbis_codebook codebook = vc->codebooks[vqbook];
    1438             : 
    1439      321319 :                             if (vr_type == 0) {
    1440             : 
    1441      115024 :                                 voffs = voffset+j*vlen;
    1442     1357436 :                                 for (k = 0; k < step; ++k) {
    1443     1242412 :                                     coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * dim;
    1444     4777020 :                                     for (l = 0; l < dim; ++l)
    1445     3534608 :                                         vec[voffs + k + l * step] += codebook.codevectors[coffs + l];
    1446             :                                 }
    1447      206295 :                             } else if (vr_type == 1) {
    1448       27632 :                                 voffs = voffset + j * vlen;
    1449      313498 :                                 for (k = 0; k < step; ++k) {
    1450      285866 :                                     coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * dim;
    1451     1073374 :                                     for (l = 0; l < dim; ++l, ++voffs) {
    1452      787508 :                                         vec[voffs]+=codebook.codevectors[coffs+l];
    1453             : 
    1454             :                                         ff_dlog(NULL, " pass %d offs: %d curr: %f change: %f cv offs.: %d  \n",
    1455             :                                                 pass, voffs, vec[voffs], codebook.codevectors[coffs+l], coffs);
    1456             :                                     }
    1457             :                                 }
    1458      178663 :                             } else if (vr_type == 2 && ch == 2 && (voffset & 1) == 0 && (dim & 1) == 0) { // most frequent case optimized
    1459      150956 :                                 voffs = voffset >> 1;
    1460             : 
    1461      301912 :                                 if (dim == 2) {
    1462     1066456 :                                     for (k = 0; k < step; ++k) {
    1463     1002098 :                                         coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * 2;
    1464     1002098 :                                         vec[voffs + k       ] += codebook.codevectors[coffs    ];
    1465     1002098 :                                         vec[voffs + k + vlen] += codebook.codevectors[coffs + 1];
    1466             :                                     }
    1467       86598 :                                 } else if (dim == 4) {
    1468      509671 :                                     for (k = 0; k < step; ++k, voffs += 2) {
    1469      446670 :                                         coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * 4;
    1470      446670 :                                         vec[voffs           ] += codebook.codevectors[coffs    ];
    1471      446670 :                                         vec[voffs + 1       ] += codebook.codevectors[coffs + 2];
    1472      446670 :                                         vec[voffs + vlen    ] += codebook.codevectors[coffs + 1];
    1473      446670 :                                         vec[voffs + vlen + 1] += codebook.codevectors[coffs + 3];
    1474             :                                     }
    1475             :                                 } else
    1476      117641 :                                 for (k = 0; k < step; ++k) {
    1477       94044 :                                     coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * dim;
    1478      470220 :                                     for (l = 0; l < dim; l += 2, voffs++) {
    1479      376176 :                                         vec[voffs       ] += codebook.codevectors[coffs + l    ];
    1480      376176 :                                         vec[voffs + vlen] += codebook.codevectors[coffs + l + 1];
    1481             : 
    1482             :                                         ff_dlog(NULL, " pass %d offs: %d curr: %f change: %f cv offs.: %d+%d  \n",
    1483             :                                                 pass, voffset / ch + (voffs % ch) * vlen,
    1484             :                                                 vec[voffset / ch + (voffs % ch) * vlen],
    1485             :                                                 codebook.codevectors[coffs + l], coffs, l);
    1486             :                                     }
    1487             :                                 }
    1488             : 
    1489       27707 :                             } else if (vr_type == 2) {
    1490       27707 :                                 unsigned voffs_div = FASTDIV(voffset << 1, ch <<1);
    1491       27707 :                                 unsigned voffs_mod = voffset - voffs_div * ch;
    1492             : 
    1493      191750 :                                 for (k = 0; k < step; ++k) {
    1494      164043 :                                     coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * dim;
    1495      912258 :                                     for (l = 0; l < dim; ++l) {
    1496     1496430 :                                         vec[voffs_div + voffs_mod * vlen] +=
    1497      748215 :                                             codebook.codevectors[coffs + l];
    1498             : 
    1499             :                                         ff_dlog(NULL, " pass %d offs: %d curr: %f change: %f cv offs.: %d+%d  \n",
    1500             :                                                 pass, voffs_div + voffs_mod * vlen,
    1501             :                                                 vec[voffs_div + voffs_mod * vlen],
    1502             :                                                 codebook.codevectors[coffs + l], coffs, l);
    1503             : 
    1504      748215 :                                         if (++voffs_mod == ch) {
    1505      149643 :                                             voffs_div++;
    1506      149643 :                                             voffs_mod = 0;
    1507             :                                         }
    1508             :                                     }
    1509             :                                 }
    1510             :                             }
    1511             :                         }
    1512             :                     }
    1513      796270 :                     j_times_ptns_to_read += ptns_to_read;
    1514             :                 }
    1515      733794 :                 ++partition_count;
    1516      733794 :                 voffset += vr->partition_size;
    1517             :             }
    1518             :         }
    1519       21525 :         if (libvorbis_bug && !pass) {
    1520           0 :             for (j = 0; j < ch_used; ++j) {
    1521           0 :                 if (!do_not_decode[j]) {
    1522           0 :                     get_vlc2(&vc->gb, vc->codebooks[vr->classbook].vlc.table,
    1523           0 :                                 vc->codebooks[vr->classbook].nb_bits, 3);
    1524             :                 }
    1525             :             }
    1526             :         }
    1527             :     }
    1528        9341 :     return 0;
    1529             : }
    1530             : 
    1531        9458 : static inline int vorbis_residue_decode(vorbis_context *vc, vorbis_residue *vr,
    1532             :                                         unsigned ch,
    1533             :                                         uint8_t *do_not_decode,
    1534             :                                         float *vec, unsigned vlen,
    1535             :                                         unsigned ch_left)
    1536             : {
    1537        9458 :     if (vr->type == 2)
    1538        4260 :         return vorbis_residue_decode_internal(vc, vr, ch, do_not_decode, vec, vlen, ch_left, 2);
    1539        5198 :     else if (vr->type == 1)
    1540        1790 :         return vorbis_residue_decode_internal(vc, vr, ch, do_not_decode, vec, vlen, ch_left, 1);
    1541        3408 :     else if (vr->type == 0)
    1542        3408 :         return vorbis_residue_decode_internal(vc, vr, ch, do_not_decode, vec, vlen, ch_left, 0);
    1543             :     else {
    1544           0 :         av_log(vc->avctx, AV_LOG_ERROR, " Invalid residue type while residue decode?! \n");
    1545           0 :         return AVERROR_INVALIDDATA;
    1546             :     }
    1547             : }
    1548             : 
    1549        5370 : void ff_vorbis_inverse_coupling(float *mag, float *ang, intptr_t blocksize)
    1550             : {
    1551             :     int i;
    1552     4053626 :     for (i = 0;  i < blocksize;  i++) {
    1553     4048256 :         if (mag[i] > 0.0) {
    1554      625193 :             if (ang[i] > 0.0) {
    1555      156334 :                 ang[i] = mag[i] - ang[i];
    1556             :             } else {
    1557      468859 :                 float temp = ang[i];
    1558      468859 :                 ang[i]     = mag[i];
    1559      468859 :                 mag[i]    += temp;
    1560             :             }
    1561             :         } else {
    1562     3423063 :             if (ang[i] > 0.0) {
    1563      160284 :                 ang[i] += mag[i];
    1564             :             } else {
    1565     3262779 :                 float temp = ang[i];
    1566     3262779 :                 ang[i]     = mag[i];
    1567     3262779 :                 mag[i]    -= temp;
    1568             :             }
    1569             :         }
    1570             :     }
    1571        5370 : }
    1572             : 
    1573             : // Decode the audio packet using the functions above
    1574             : 
    1575        9088 : static int vorbis_parse_audio_packet(vorbis_context *vc, float **floor_ptr)
    1576             : {
    1577        9088 :     GetBitContext *gb = &vc->gb;
    1578             :     FFTContext *mdct;
    1579        9088 :     int previous_window = vc->previous_window;
    1580             :     unsigned mode_number, blockflag, blocksize;
    1581             :     int i, j;
    1582             :     uint8_t no_residue[255];
    1583             :     uint8_t do_not_decode[255];
    1584             :     vorbis_mapping *mapping;
    1585        9088 :     float *ch_res_ptr   = vc->channel_residues;
    1586             :     uint8_t res_chan[255];
    1587        9088 :     unsigned res_num = 0;
    1588        9088 :     int retlen  = 0;
    1589        9088 :     unsigned ch_left = vc->audio_channels;
    1590             :     unsigned vlen;
    1591             : 
    1592        9088 :     if (get_bits1(gb)) {
    1593           0 :         av_log(vc->avctx, AV_LOG_ERROR, "Not a Vorbis I audio packet.\n");
    1594           0 :         return AVERROR_INVALIDDATA; // packet type not audio
    1595             :     }
    1596             : 
    1597        9088 :     if (vc->mode_count == 1) {
    1598           0 :         mode_number = 0;
    1599             :     } else {
    1600        9088 :         GET_VALIDATED_INDEX(mode_number, ilog(vc->mode_count-1), vc->mode_count)
    1601             :     }
    1602        9088 :     vc->mode_number = mode_number;
    1603        9088 :     mapping = &vc->mappings[vc->modes[mode_number].mapping];
    1604             : 
    1605             :     ff_dlog(NULL, " Mode number: %u , mapping: %d , blocktype %d\n", mode_number,
    1606             :             vc->modes[mode_number].mapping, vc->modes[mode_number].blockflag);
    1607             : 
    1608        9088 :     blockflag = vc->modes[mode_number].blockflag;
    1609        9088 :     blocksize = vc->blocksize[blockflag];
    1610        9088 :     vlen = blocksize / 2;
    1611        9088 :     if (blockflag) {
    1612        5972 :         int code = get_bits(gb, 2);
    1613        5972 :         if (previous_window < 0)
    1614           1 :             previous_window = code>>1;
    1615        3116 :     } else if (previous_window < 0)
    1616          20 :         previous_window = 0;
    1617             : 
    1618        9088 :     memset(ch_res_ptr,   0, sizeof(float) * vc->audio_channels * vlen); //FIXME can this be removed ?
    1619       26860 :     for (i = 0; i < vc->audio_channels; ++i)
    1620       17772 :         memset(floor_ptr[i], 0, vlen * sizeof(floor_ptr[0][0])); //FIXME can this be removed ?
    1621             : 
    1622             : // Decode floor
    1623             : 
    1624       26860 :     for (i = 0; i < vc->audio_channels; ++i) {
    1625             :         vorbis_floor *floor;
    1626             :         int ret;
    1627       17772 :         if (mapping->submaps > 1) {
    1628        2220 :             floor = &vc->floors[mapping->submap_floor[mapping->mux[i]]];
    1629             :         } else {
    1630       15552 :             floor = &vc->floors[mapping->submap_floor[0]];
    1631             :         }
    1632             : 
    1633       17772 :         ret = floor->decode(vc, &floor->data, floor_ptr[i]);
    1634             : 
    1635       17772 :         if (ret < 0) {
    1636           0 :             av_log(vc->avctx, AV_LOG_ERROR, "Invalid codebook in vorbis_floor_decode.\n");
    1637           0 :             return AVERROR_INVALIDDATA;
    1638             :         }
    1639       17772 :         no_residue[i] = ret;
    1640             :     }
    1641             : 
    1642             : // Nonzero vector propagate
    1643             : 
    1644       14458 :     for (i = mapping->coupling_steps - 1; i >= 0; --i) {
    1645        5370 :         if (!(no_residue[mapping->magnitude[i]] & no_residue[mapping->angle[i]])) {
    1646        4717 :             no_residue[mapping->magnitude[i]] = 0;
    1647        4717 :             no_residue[mapping->angle[i]]     = 0;
    1648             :         }
    1649             :     }
    1650             : 
    1651             : // Decode residue
    1652             : 
    1653       18546 :     for (i = 0; i < mapping->submaps; ++i) {
    1654             :         vorbis_residue *residue;
    1655        9458 :         unsigned ch = 0;
    1656             :         int ret;
    1657             : 
    1658       29450 :         for (j = 0; j < vc->audio_channels; ++j) {
    1659       19992 :             if ((mapping->submaps == 1) || (i == mapping->mux[j])) {
    1660       17772 :                 res_chan[j] = res_num;
    1661       17772 :                 if (no_residue[j]) {
    1662        1206 :                     do_not_decode[ch] = 1;
    1663             :                 } else {
    1664       16566 :                     do_not_decode[ch] = 0;
    1665             :                 }
    1666       17772 :                 ++ch;
    1667       17772 :                 ++res_num;
    1668             :             }
    1669             :         }
    1670        9458 :         residue = &vc->residues[mapping->submap_residue[i]];
    1671        9458 :         if (ch_left < ch) {
    1672           0 :             av_log(vc->avctx, AV_LOG_ERROR, "Too many channels in vorbis_floor_decode.\n");
    1673           0 :             return AVERROR_INVALIDDATA;
    1674             :         }
    1675        9458 :         if (ch) {
    1676        9458 :             ret = vorbis_residue_decode(vc, residue, ch, do_not_decode, ch_res_ptr, vlen, ch_left);
    1677        9458 :             if (ret < 0)
    1678           0 :                 return ret;
    1679             :         }
    1680             : 
    1681        9458 :         ch_res_ptr += ch * vlen;
    1682        9458 :         ch_left -= ch;
    1683             :     }
    1684             : 
    1685        9088 :     if (ch_left > 0)
    1686           0 :         return AVERROR_INVALIDDATA;
    1687             : 
    1688             : // Inverse coupling
    1689             : 
    1690       14458 :     for (i = mapping->coupling_steps - 1; i >= 0; --i) { //warning: i has to be signed
    1691             :         float *mag, *ang;
    1692             : 
    1693        5370 :         mag = vc->channel_residues+res_chan[mapping->magnitude[i]] * blocksize / 2;
    1694        5370 :         ang = vc->channel_residues+res_chan[mapping->angle[i]]     * blocksize / 2;
    1695        5370 :         vc->dsp.vorbis_inverse_coupling(mag, ang, blocksize / 2);
    1696             :     }
    1697             : 
    1698             : // Dotproduct, MDCT
    1699             : 
    1700        9088 :     mdct = &vc->mdct[blockflag];
    1701             : 
    1702       26860 :     for (j = vc->audio_channels-1;j >= 0; j--) {
    1703       17772 :         ch_res_ptr   = vc->channel_residues + res_chan[j] * blocksize / 2;
    1704       17772 :         vc->fdsp->vector_fmul(floor_ptr[j], floor_ptr[j], ch_res_ptr, blocksize / 2);
    1705       17772 :         mdct->imdct_half(mdct, ch_res_ptr, floor_ptr[j]);
    1706             :     }
    1707             : 
    1708             : // Overlap/add, save data for next overlapping
    1709             : 
    1710        9088 :     retlen = (blocksize + vc->blocksize[previous_window]) / 4;
    1711       26860 :     for (j = 0; j < vc->audio_channels; j++) {
    1712       17772 :         unsigned bs0 = vc->blocksize[0];
    1713       17772 :         unsigned bs1 = vc->blocksize[1];
    1714       17772 :         float *residue    = vc->channel_residues + res_chan[j] * blocksize / 2;
    1715       17772 :         float *saved      = vc->saved + j * bs1 / 4;
    1716       17772 :         float *ret        = floor_ptr[j];
    1717       17772 :         float *buf        = residue;
    1718       17772 :         const float *win  = vc->win[blockflag & previous_window];
    1719             : 
    1720       17772 :         if (blockflag == previous_window) {
    1721       16341 :             vc->fdsp->vector_fmul_window(ret, saved, buf, win, blocksize / 4);
    1722        1431 :         } else if (blockflag > previous_window) {
    1723         735 :             vc->fdsp->vector_fmul_window(ret, saved, buf, win, bs0 / 4);
    1724         735 :             memcpy(ret+bs0/2, buf+bs0/4, ((bs1-bs0)/4) * sizeof(float));
    1725             :         } else {
    1726         696 :             memcpy(ret, saved, ((bs1 - bs0) / 4) * sizeof(float));
    1727         696 :             vc->fdsp->vector_fmul_window(ret + (bs1 - bs0) / 4, saved + (bs1 - bs0) / 4, buf, win, bs0 / 4);
    1728             :         }
    1729       17772 :         memcpy(saved, buf + blocksize / 4, blocksize / 4 * sizeof(float));
    1730             :     }
    1731             : 
    1732        9088 :     vc->previous_window = blockflag;
    1733        9088 :     return retlen;
    1734             : }
    1735             : 
    1736             : // Return the decoded audio packet through the standard api
    1737             : 
    1738        9088 : static int vorbis_decode_frame(AVCodecContext *avctx, void *data,
    1739             :                                int *got_frame_ptr, AVPacket *avpkt)
    1740             : {
    1741        9088 :     const uint8_t *buf = avpkt->data;
    1742        9088 :     int buf_size       = avpkt->size;
    1743        9088 :     vorbis_context *vc = avctx->priv_data;
    1744        9088 :     AVFrame *frame     = data;
    1745        9088 :     GetBitContext *gb = &vc->gb;
    1746             :     float *channel_ptrs[255];
    1747             :     int i, len, ret;
    1748             : 
    1749             :     ff_dlog(NULL, "packet length %d \n", buf_size);
    1750             : 
    1751        9088 :     if (*buf == 1 && buf_size > 7) {
    1752           0 :         if ((ret = init_get_bits8(gb, buf + 1, buf_size - 1)) < 0)
    1753           0 :             return ret;
    1754             : 
    1755           0 :         vorbis_free(vc);
    1756           0 :         if ((ret = vorbis_parse_id_hdr(vc))) {
    1757           0 :             av_log(avctx, AV_LOG_ERROR, "Id header corrupt.\n");
    1758           0 :             vorbis_free(vc);
    1759           0 :             return ret;
    1760             :         }
    1761             : 
    1762           0 :         if (vc->audio_channels > 8)
    1763           0 :             avctx->channel_layout = 0;
    1764             :         else
    1765           0 :             avctx->channel_layout = ff_vorbis_channel_layouts[vc->audio_channels - 1];
    1766             : 
    1767           0 :         avctx->channels    = vc->audio_channels;
    1768           0 :         avctx->sample_rate = vc->audio_samplerate;
    1769           0 :         return buf_size;
    1770             :     }
    1771             : 
    1772        9088 :     if (*buf == 3 && buf_size > 7) {
    1773           0 :         av_log(avctx, AV_LOG_DEBUG, "Ignoring comment header\n");
    1774           0 :         return buf_size;
    1775             :     }
    1776             : 
    1777        9088 :     if (*buf == 5 && buf_size > 7 && vc->channel_residues && !vc->modes) {
    1778           0 :         if ((ret = init_get_bits8(gb, buf + 1, buf_size - 1)) < 0)
    1779           0 :             return ret;
    1780             : 
    1781           0 :         if ((ret = vorbis_parse_setup_hdr(vc))) {
    1782           0 :             av_log(avctx, AV_LOG_ERROR, "Setup header corrupt.\n");
    1783           0 :             vorbis_free(vc);
    1784           0 :             return ret;
    1785             :         }
    1786           0 :         return buf_size;
    1787             :     }
    1788             : 
    1789        9088 :     if (!vc->channel_residues || !vc->modes) {
    1790           0 :         av_log(avctx, AV_LOG_ERROR, "Data packet before valid headers\n");
    1791           0 :         return AVERROR_INVALIDDATA;
    1792             :     }
    1793             : 
    1794             :     /* get output buffer */
    1795        9088 :     frame->nb_samples = vc->blocksize[1] / 2;
    1796        9088 :     if ((ret = ff_get_buffer(avctx, frame, 0)) < 0)
    1797           0 :         return ret;
    1798             : 
    1799        9088 :     if (vc->audio_channels > 8) {
    1800           0 :         for (i = 0; i < vc->audio_channels; i++)
    1801           0 :             channel_ptrs[i] = (float *)frame->extended_data[i];
    1802             :     } else {
    1803       26860 :         for (i = 0; i < vc->audio_channels; i++) {
    1804       17772 :             int ch = ff_vorbis_channel_layout_offsets[vc->audio_channels - 1][i];
    1805       17772 :             channel_ptrs[ch] = (float *)frame->extended_data[i];
    1806             :         }
    1807             :     }
    1808             : 
    1809        9088 :     if ((ret = init_get_bits8(gb, buf, buf_size)) < 0)
    1810           0 :         return ret;
    1811             : 
    1812        9088 :     if ((len = vorbis_parse_audio_packet(vc, channel_ptrs)) <= 0)
    1813           0 :         return len;
    1814             : 
    1815        9088 :     if (!vc->first_frame) {
    1816          21 :         vc->first_frame = 1;
    1817          21 :         *got_frame_ptr = 0;
    1818          21 :         av_frame_unref(frame);
    1819          21 :         return buf_size;
    1820             :     }
    1821             : 
    1822             :     ff_dlog(NULL, "parsed %d bytes %d bits, returned %d samples (*ch*bits) \n",
    1823             :             get_bits_count(gb) / 8, get_bits_count(gb) % 8, len);
    1824             : 
    1825        9067 :     frame->nb_samples = len;
    1826        9067 :     *got_frame_ptr    = 1;
    1827             : 
    1828        9067 :     return buf_size;
    1829             : }
    1830             : 
    1831             : // Close decoder
    1832             : 
    1833          55 : static av_cold int vorbis_decode_close(AVCodecContext *avctx)
    1834             : {
    1835          55 :     vorbis_context *vc = avctx->priv_data;
    1836             : 
    1837          55 :     vorbis_free(vc);
    1838             : 
    1839          55 :     return 0;
    1840             : }
    1841             : 
    1842           0 : static av_cold void vorbis_decode_flush(AVCodecContext *avctx)
    1843             : {
    1844           0 :     vorbis_context *vc = avctx->priv_data;
    1845             : 
    1846           0 :     if (vc->saved) {
    1847           0 :         memset(vc->saved, 0, (vc->blocksize[1] / 4) * vc->audio_channels *
    1848             :                              sizeof(*vc->saved));
    1849             :     }
    1850           0 :     vc->previous_window = -1;
    1851           0 :     vc->first_frame = 0;
    1852           0 : }
    1853             : 
    1854             : AVCodec ff_vorbis_decoder = {
    1855             :     .name            = "vorbis",
    1856             :     .long_name       = NULL_IF_CONFIG_SMALL("Vorbis"),
    1857             :     .type            = AVMEDIA_TYPE_AUDIO,
    1858             :     .id              = AV_CODEC_ID_VORBIS,
    1859             :     .priv_data_size  = sizeof(vorbis_context),
    1860             :     .init            = vorbis_decode_init,
    1861             :     .close           = vorbis_decode_close,
    1862             :     .decode          = vorbis_decode_frame,
    1863             :     .flush           = vorbis_decode_flush,
    1864             :     .capabilities    = AV_CODEC_CAP_DR1,
    1865             :     .channel_layouts = ff_vorbis_channel_layouts,
    1866             :     .sample_fmts     = (const enum AVSampleFormat[]) { AV_SAMPLE_FMT_FLTP,
    1867             :                                                        AV_SAMPLE_FMT_NONE },
    1868             : };

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