1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/libs/vorbis/info.c	Sat Feb 01 19:58:19 2014 +0200
     1.3 @@ -0,0 +1,668 @@
     1.4 +/********************************************************************
     1.5 + *                                                                  *
     1.6 + * THIS FILE IS PART OF THE OggVorbis SOFTWARE CODEC SOURCE CODE.   *
     1.7 + * USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS     *
     1.8 + * GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE *
     1.9 + * IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING.       *
    1.10 + *                                                                  *
    1.11 + * THE OggVorbis SOURCE CODE IS (C) COPYRIGHT 1994-2010             *
    1.12 + * by the Xiph.Org Foundation http://www.xiph.org/                  *
    1.13 + *                                                                  *
    1.14 + ********************************************************************
    1.15 +
    1.16 + function: maintain the info structure, info <-> header packets
    1.17 + last mod: $Id: info.c 18186 2012-02-03 22:08:44Z xiphmont $
    1.18 +
    1.19 + ********************************************************************/
    1.20 +
    1.21 +/* general handling of the header and the vorbis_info structure (and
    1.22 +   substructures) */
    1.23 +
    1.24 +#include <stdlib.h>
    1.25 +#include <string.h>
    1.26 +#include <ctype.h>
    1.27 +#include <ogg/ogg.h>
    1.28 +#include "vorbis/codec.h"
    1.29 +#include "codec_internal.h"
    1.30 +#include "codebook.h"
    1.31 +#include "registry.h"
    1.32 +#include "window.h"
    1.33 +#include "psy.h"
    1.34 +#include "misc.h"
    1.35 +#include "os.h"
    1.36 +
    1.37 +#define GENERAL_VENDOR_STRING "Xiph.Org libVorbis 1.3.3"
    1.38 +#define ENCODE_VENDOR_STRING "Xiph.Org libVorbis I 20120203 (Omnipresent)"
    1.39 +
    1.40 +/* helpers */
    1.41 +static int ilog2(unsigned int v){
    1.42 +  int ret=0;
    1.43 +  if(v)--v;
    1.44 +  while(v){
    1.45 +    ret++;
    1.46 +    v>>=1;
    1.47 +  }
    1.48 +  return(ret);
    1.49 +}
    1.50 +
    1.51 +static void _v_writestring(oggpack_buffer *o,const char *s, int bytes){
    1.52 +
    1.53 +  while(bytes--){
    1.54 +    oggpack_write(o,*s++,8);
    1.55 +  }
    1.56 +}
    1.57 +
    1.58 +static void _v_readstring(oggpack_buffer *o,char *buf,int bytes){
    1.59 +  while(bytes--){
    1.60 +    *buf++=oggpack_read(o,8);
    1.61 +  }
    1.62 +}
    1.63 +
    1.64 +void vorbis_comment_init(vorbis_comment *vc){
    1.65 +  memset(vc,0,sizeof(*vc));
    1.66 +}
    1.67 +
    1.68 +void vorbis_comment_add(vorbis_comment *vc,const char *comment){
    1.69 +  vc->user_comments=_ogg_realloc(vc->user_comments,
    1.70 +                            (vc->comments+2)*sizeof(*vc->user_comments));
    1.71 +  vc->comment_lengths=_ogg_realloc(vc->comment_lengths,
    1.72 +                                  (vc->comments+2)*sizeof(*vc->comment_lengths));
    1.73 +  vc->comment_lengths[vc->comments]=strlen(comment);
    1.74 +  vc->user_comments[vc->comments]=_ogg_malloc(vc->comment_lengths[vc->comments]+1);
    1.75 +  strcpy(vc->user_comments[vc->comments], comment);
    1.76 +  vc->comments++;
    1.77 +  vc->user_comments[vc->comments]=NULL;
    1.78 +}
    1.79 +
    1.80 +void vorbis_comment_add_tag(vorbis_comment *vc, const char *tag, const char *contents){
    1.81 +  char *comment=alloca(strlen(tag)+strlen(contents)+2); /* +2 for = and \0 */
    1.82 +  strcpy(comment, tag);
    1.83 +  strcat(comment, "=");
    1.84 +  strcat(comment, contents);
    1.85 +  vorbis_comment_add(vc, comment);
    1.86 +}
    1.87 +
    1.88 +/* This is more or less the same as strncasecmp - but that doesn't exist
    1.89 + * everywhere, and this is a fairly trivial function, so we include it */
    1.90 +static int tagcompare(const char *s1, const char *s2, int n){
    1.91 +  int c=0;
    1.92 +  while(c < n){
    1.93 +    if(toupper(s1[c]) != toupper(s2[c]))
    1.94 +      return !0;
    1.95 +    c++;
    1.96 +  }
    1.97 +  return 0;
    1.98 +}
    1.99 +
   1.100 +char *vorbis_comment_query(vorbis_comment *vc, const char *tag, int count){
   1.101 +  long i;
   1.102 +  int found = 0;
   1.103 +  int taglen = strlen(tag)+1; /* +1 for the = we append */
   1.104 +  char *fulltag = alloca(taglen+ 1);
   1.105 +
   1.106 +  strcpy(fulltag, tag);
   1.107 +  strcat(fulltag, "=");
   1.108 +
   1.109 +  for(i=0;i<vc->comments;i++){
   1.110 +    if(!tagcompare(vc->user_comments[i], fulltag, taglen)){
   1.111 +      if(count == found)
   1.112 +        /* We return a pointer to the data, not a copy */
   1.113 +              return vc->user_comments[i] + taglen;
   1.114 +      else
   1.115 +        found++;
   1.116 +    }
   1.117 +  }
   1.118 +  return NULL; /* didn't find anything */
   1.119 +}
   1.120 +
   1.121 +int vorbis_comment_query_count(vorbis_comment *vc, const char *tag){
   1.122 +  int i,count=0;
   1.123 +  int taglen = strlen(tag)+1; /* +1 for the = we append */
   1.124 +  char *fulltag = alloca(taglen+1);
   1.125 +  strcpy(fulltag,tag);
   1.126 +  strcat(fulltag, "=");
   1.127 +
   1.128 +  for(i=0;i<vc->comments;i++){
   1.129 +    if(!tagcompare(vc->user_comments[i], fulltag, taglen))
   1.130 +      count++;
   1.131 +  }
   1.132 +
   1.133 +  return count;
   1.134 +}
   1.135 +
   1.136 +void vorbis_comment_clear(vorbis_comment *vc){
   1.137 +  if(vc){
   1.138 +    long i;
   1.139 +    if(vc->user_comments){
   1.140 +      for(i=0;i<vc->comments;i++)
   1.141 +        if(vc->user_comments[i])_ogg_free(vc->user_comments[i]);
   1.142 +      _ogg_free(vc->user_comments);
   1.143 +    }
   1.144 +    if(vc->comment_lengths)_ogg_free(vc->comment_lengths);
   1.145 +    if(vc->vendor)_ogg_free(vc->vendor);
   1.146 +    memset(vc,0,sizeof(*vc));
   1.147 +  }
   1.148 +}
   1.149 +
   1.150 +/* blocksize 0 is guaranteed to be short, 1 is guaranteed to be long.
   1.151 +   They may be equal, but short will never ge greater than long */
   1.152 +int vorbis_info_blocksize(vorbis_info *vi,int zo){
   1.153 +  codec_setup_info *ci = vi->codec_setup;
   1.154 +  return ci ? ci->blocksizes[zo] : -1;
   1.155 +}
   1.156 +
   1.157 +/* used by synthesis, which has a full, alloced vi */
   1.158 +void vorbis_info_init(vorbis_info *vi){
   1.159 +  memset(vi,0,sizeof(*vi));
   1.160 +  vi->codec_setup=_ogg_calloc(1,sizeof(codec_setup_info));
   1.161 +}
   1.162 +
   1.163 +void vorbis_info_clear(vorbis_info *vi){
   1.164 +  codec_setup_info     *ci=vi->codec_setup;
   1.165 +  int i;
   1.166 +
   1.167 +  if(ci){
   1.168 +
   1.169 +    for(i=0;i<ci->modes;i++)
   1.170 +      if(ci->mode_param[i])_ogg_free(ci->mode_param[i]);
   1.171 +
   1.172 +    for(i=0;i<ci->maps;i++) /* unpack does the range checking */
   1.173 +      if(ci->map_param[i]) /* this may be cleaning up an aborted
   1.174 +                              unpack, in which case the below type
   1.175 +                              cannot be trusted */
   1.176 +        _mapping_P[ci->map_type[i]]->free_info(ci->map_param[i]);
   1.177 +
   1.178 +    for(i=0;i<ci->floors;i++) /* unpack does the range checking */
   1.179 +      if(ci->floor_param[i]) /* this may be cleaning up an aborted
   1.180 +                                unpack, in which case the below type
   1.181 +                                cannot be trusted */
   1.182 +        _floor_P[ci->floor_type[i]]->free_info(ci->floor_param[i]);
   1.183 +
   1.184 +    for(i=0;i<ci->residues;i++) /* unpack does the range checking */
   1.185 +      if(ci->residue_param[i]) /* this may be cleaning up an aborted
   1.186 +                                  unpack, in which case the below type
   1.187 +                                  cannot be trusted */
   1.188 +        _residue_P[ci->residue_type[i]]->free_info(ci->residue_param[i]);
   1.189 +
   1.190 +    for(i=0;i<ci->books;i++){
   1.191 +      if(ci->book_param[i]){
   1.192 +        /* knows if the book was not alloced */
   1.193 +        vorbis_staticbook_destroy(ci->book_param[i]);
   1.194 +      }
   1.195 +      if(ci->fullbooks)
   1.196 +        vorbis_book_clear(ci->fullbooks+i);
   1.197 +    }
   1.198 +    if(ci->fullbooks)
   1.199 +        _ogg_free(ci->fullbooks);
   1.200 +
   1.201 +    for(i=0;i<ci->psys;i++)
   1.202 +      _vi_psy_free(ci->psy_param[i]);
   1.203 +
   1.204 +    _ogg_free(ci);
   1.205 +  }
   1.206 +
   1.207 +  memset(vi,0,sizeof(*vi));
   1.208 +}
   1.209 +
   1.210 +/* Header packing/unpacking ********************************************/
   1.211 +
   1.212 +static int _vorbis_unpack_info(vorbis_info *vi,oggpack_buffer *opb){
   1.213 +  codec_setup_info     *ci=vi->codec_setup;
   1.214 +  if(!ci)return(OV_EFAULT);
   1.215 +
   1.216 +  vi->version=oggpack_read(opb,32);
   1.217 +  if(vi->version!=0)return(OV_EVERSION);
   1.218 +
   1.219 +  vi->channels=oggpack_read(opb,8);
   1.220 +  vi->rate=oggpack_read(opb,32);
   1.221 +
   1.222 +  vi->bitrate_upper=oggpack_read(opb,32);
   1.223 +  vi->bitrate_nominal=oggpack_read(opb,32);
   1.224 +  vi->bitrate_lower=oggpack_read(opb,32);
   1.225 +
   1.226 +  ci->blocksizes[0]=1<<oggpack_read(opb,4);
   1.227 +  ci->blocksizes[1]=1<<oggpack_read(opb,4);
   1.228 +
   1.229 +  if(vi->rate<1)goto err_out;
   1.230 +  if(vi->channels<1)goto err_out;
   1.231 +  if(ci->blocksizes[0]<64)goto err_out;
   1.232 +  if(ci->blocksizes[1]<ci->blocksizes[0])goto err_out;
   1.233 +  if(ci->blocksizes[1]>8192)goto err_out;
   1.234 +
   1.235 +  if(oggpack_read(opb,1)!=1)goto err_out; /* EOP check */
   1.236 +
   1.237 +  return(0);
   1.238 + err_out:
   1.239 +  vorbis_info_clear(vi);
   1.240 +  return(OV_EBADHEADER);
   1.241 +}
   1.242 +
   1.243 +static int _vorbis_unpack_comment(vorbis_comment *vc,oggpack_buffer *opb){
   1.244 +  int i;
   1.245 +  int vendorlen=oggpack_read(opb,32);
   1.246 +  if(vendorlen<0)goto err_out;
   1.247 +  if(vendorlen>opb->storage-8)goto err_out;
   1.248 +  vc->vendor=_ogg_calloc(vendorlen+1,1);
   1.249 +  _v_readstring(opb,vc->vendor,vendorlen);
   1.250 +  i=oggpack_read(opb,32);
   1.251 +  if(i<0)goto err_out;
   1.252 +  if(i>((opb->storage-oggpack_bytes(opb))>>2))goto err_out;
   1.253 +  vc->comments=i;
   1.254 +  vc->user_comments=_ogg_calloc(vc->comments+1,sizeof(*vc->user_comments));
   1.255 +  vc->comment_lengths=_ogg_calloc(vc->comments+1, sizeof(*vc->comment_lengths));
   1.256 +
   1.257 +  for(i=0;i<vc->comments;i++){
   1.258 +    int len=oggpack_read(opb,32);
   1.259 +    if(len<0)goto err_out;
   1.260 +    if(len>opb->storage-oggpack_bytes(opb))goto err_out;
   1.261 +    vc->comment_lengths[i]=len;
   1.262 +    vc->user_comments[i]=_ogg_calloc(len+1,1);
   1.263 +    _v_readstring(opb,vc->user_comments[i],len);
   1.264 +  }
   1.265 +  if(oggpack_read(opb,1)!=1)goto err_out; /* EOP check */
   1.266 +
   1.267 +  return(0);
   1.268 + err_out:
   1.269 +  vorbis_comment_clear(vc);
   1.270 +  return(OV_EBADHEADER);
   1.271 +}
   1.272 +
   1.273 +/* all of the real encoding details are here.  The modes, books,
   1.274 +   everything */
   1.275 +static int _vorbis_unpack_books(vorbis_info *vi,oggpack_buffer *opb){
   1.276 +  codec_setup_info     *ci=vi->codec_setup;
   1.277 +  int i;
   1.278 +  if(!ci)return(OV_EFAULT);
   1.279 +
   1.280 +  /* codebooks */
   1.281 +  ci->books=oggpack_read(opb,8)+1;
   1.282 +  if(ci->books<=0)goto err_out;
   1.283 +  for(i=0;i<ci->books;i++){
   1.284 +    ci->book_param[i]=vorbis_staticbook_unpack(opb);
   1.285 +    if(!ci->book_param[i])goto err_out;
   1.286 +  }
   1.287 +
   1.288 +  /* time backend settings; hooks are unused */
   1.289 +  {
   1.290 +    int times=oggpack_read(opb,6)+1;
   1.291 +    if(times<=0)goto err_out;
   1.292 +    for(i=0;i<times;i++){
   1.293 +      int test=oggpack_read(opb,16);
   1.294 +      if(test<0 || test>=VI_TIMEB)goto err_out;
   1.295 +    }
   1.296 +  }
   1.297 +
   1.298 +  /* floor backend settings */
   1.299 +  ci->floors=oggpack_read(opb,6)+1;
   1.300 +  if(ci->floors<=0)goto err_out;
   1.301 +  for(i=0;i<ci->floors;i++){
   1.302 +    ci->floor_type[i]=oggpack_read(opb,16);
   1.303 +    if(ci->floor_type[i]<0 || ci->floor_type[i]>=VI_FLOORB)goto err_out;
   1.304 +    ci->floor_param[i]=_floor_P[ci->floor_type[i]]->unpack(vi,opb);
   1.305 +    if(!ci->floor_param[i])goto err_out;
   1.306 +  }
   1.307 +
   1.308 +  /* residue backend settings */
   1.309 +  ci->residues=oggpack_read(opb,6)+1;
   1.310 +  if(ci->residues<=0)goto err_out;
   1.311 +  for(i=0;i<ci->residues;i++){
   1.312 +    ci->residue_type[i]=oggpack_read(opb,16);
   1.313 +    if(ci->residue_type[i]<0 || ci->residue_type[i]>=VI_RESB)goto err_out;
   1.314 +    ci->residue_param[i]=_residue_P[ci->residue_type[i]]->unpack(vi,opb);
   1.315 +    if(!ci->residue_param[i])goto err_out;
   1.316 +  }
   1.317 +
   1.318 +  /* map backend settings */
   1.319 +  ci->maps=oggpack_read(opb,6)+1;
   1.320 +  if(ci->maps<=0)goto err_out;
   1.321 +  for(i=0;i<ci->maps;i++){
   1.322 +    ci->map_type[i]=oggpack_read(opb,16);
   1.323 +    if(ci->map_type[i]<0 || ci->map_type[i]>=VI_MAPB)goto err_out;
   1.324 +    ci->map_param[i]=_mapping_P[ci->map_type[i]]->unpack(vi,opb);
   1.325 +    if(!ci->map_param[i])goto err_out;
   1.326 +  }
   1.327 +
   1.328 +  /* mode settings */
   1.329 +  ci->modes=oggpack_read(opb,6)+1;
   1.330 +  if(ci->modes<=0)goto err_out;
   1.331 +  for(i=0;i<ci->modes;i++){
   1.332 +    ci->mode_param[i]=_ogg_calloc(1,sizeof(*ci->mode_param[i]));
   1.333 +    ci->mode_param[i]->blockflag=oggpack_read(opb,1);
   1.334 +    ci->mode_param[i]->windowtype=oggpack_read(opb,16);
   1.335 +    ci->mode_param[i]->transformtype=oggpack_read(opb,16);
   1.336 +    ci->mode_param[i]->mapping=oggpack_read(opb,8);
   1.337 +
   1.338 +    if(ci->mode_param[i]->windowtype>=VI_WINDOWB)goto err_out;
   1.339 +    if(ci->mode_param[i]->transformtype>=VI_WINDOWB)goto err_out;
   1.340 +    if(ci->mode_param[i]->mapping>=ci->maps)goto err_out;
   1.341 +    if(ci->mode_param[i]->mapping<0)goto err_out;
   1.342 +  }
   1.343 +
   1.344 +  if(oggpack_read(opb,1)!=1)goto err_out; /* top level EOP check */
   1.345 +
   1.346 +  return(0);
   1.347 + err_out:
   1.348 +  vorbis_info_clear(vi);
   1.349 +  return(OV_EBADHEADER);
   1.350 +}
   1.351 +
   1.352 +/* Is this packet a vorbis ID header? */
   1.353 +int vorbis_synthesis_idheader(ogg_packet *op){
   1.354 +  oggpack_buffer opb;
   1.355 +  char buffer[6];
   1.356 +
   1.357 +  if(op){
   1.358 +    oggpack_readinit(&opb,op->packet,op->bytes);
   1.359 +
   1.360 +    if(!op->b_o_s)
   1.361 +      return(0); /* Not the initial packet */
   1.362 +
   1.363 +    if(oggpack_read(&opb,8) != 1)
   1.364 +      return 0; /* not an ID header */
   1.365 +
   1.366 +    memset(buffer,0,6);
   1.367 +    _v_readstring(&opb,buffer,6);
   1.368 +    if(memcmp(buffer,"vorbis",6))
   1.369 +      return 0; /* not vorbis */
   1.370 +
   1.371 +    return 1;
   1.372 +  }
   1.373 +
   1.374 +  return 0;
   1.375 +}
   1.376 +
   1.377 +/* The Vorbis header is in three packets; the initial small packet in
   1.378 +   the first page that identifies basic parameters, a second packet
   1.379 +   with bitstream comments and a third packet that holds the
   1.380 +   codebook. */
   1.381 +
   1.382 +int vorbis_synthesis_headerin(vorbis_info *vi,vorbis_comment *vc,ogg_packet *op){
   1.383 +  oggpack_buffer opb;
   1.384 +
   1.385 +  if(op){
   1.386 +    oggpack_readinit(&opb,op->packet,op->bytes);
   1.387 +
   1.388 +    /* Which of the three types of header is this? */
   1.389 +    /* Also verify header-ness, vorbis */
   1.390 +    {
   1.391 +      char buffer[6];
   1.392 +      int packtype=oggpack_read(&opb,8);
   1.393 +      memset(buffer,0,6);
   1.394 +      _v_readstring(&opb,buffer,6);
   1.395 +      if(memcmp(buffer,"vorbis",6)){
   1.396 +        /* not a vorbis header */
   1.397 +        return(OV_ENOTVORBIS);
   1.398 +      }
   1.399 +      switch(packtype){
   1.400 +      case 0x01: /* least significant *bit* is read first */
   1.401 +        if(!op->b_o_s){
   1.402 +          /* Not the initial packet */
   1.403 +          return(OV_EBADHEADER);
   1.404 +        }
   1.405 +        if(vi->rate!=0){
   1.406 +          /* previously initialized info header */
   1.407 +          return(OV_EBADHEADER);
   1.408 +        }
   1.409 +
   1.410 +        return(_vorbis_unpack_info(vi,&opb));
   1.411 +
   1.412 +      case 0x03: /* least significant *bit* is read first */
   1.413 +        if(vi->rate==0){
   1.414 +          /* um... we didn't get the initial header */
   1.415 +          return(OV_EBADHEADER);
   1.416 +        }
   1.417 +
   1.418 +        return(_vorbis_unpack_comment(vc,&opb));
   1.419 +
   1.420 +      case 0x05: /* least significant *bit* is read first */
   1.421 +        if(vi->rate==0 || vc->vendor==NULL){
   1.422 +          /* um... we didn;t get the initial header or comments yet */
   1.423 +          return(OV_EBADHEADER);
   1.424 +        }
   1.425 +
   1.426 +        return(_vorbis_unpack_books(vi,&opb));
   1.427 +
   1.428 +      default:
   1.429 +        /* Not a valid vorbis header type */
   1.430 +        return(OV_EBADHEADER);
   1.431 +        break;
   1.432 +      }
   1.433 +    }
   1.434 +  }
   1.435 +  return(OV_EBADHEADER);
   1.436 +}
   1.437 +
   1.438 +/* pack side **********************************************************/
   1.439 +
   1.440 +static int _vorbis_pack_info(oggpack_buffer *opb,vorbis_info *vi){
   1.441 +  codec_setup_info     *ci=vi->codec_setup;
   1.442 +  if(!ci)return(OV_EFAULT);
   1.443 +
   1.444 +  /* preamble */
   1.445 +  oggpack_write(opb,0x01,8);
   1.446 +  _v_writestring(opb,"vorbis", 6);
   1.447 +
   1.448 +  /* basic information about the stream */
   1.449 +  oggpack_write(opb,0x00,32);
   1.450 +  oggpack_write(opb,vi->channels,8);
   1.451 +  oggpack_write(opb,vi->rate,32);
   1.452 +
   1.453 +  oggpack_write(opb,vi->bitrate_upper,32);
   1.454 +  oggpack_write(opb,vi->bitrate_nominal,32);
   1.455 +  oggpack_write(opb,vi->bitrate_lower,32);
   1.456 +
   1.457 +  oggpack_write(opb,ilog2(ci->blocksizes[0]),4);
   1.458 +  oggpack_write(opb,ilog2(ci->blocksizes[1]),4);
   1.459 +  oggpack_write(opb,1,1);
   1.460 +
   1.461 +  return(0);
   1.462 +}
   1.463 +
   1.464 +static int _vorbis_pack_comment(oggpack_buffer *opb,vorbis_comment *vc){
   1.465 +  int bytes = strlen(ENCODE_VENDOR_STRING);
   1.466 +
   1.467 +  /* preamble */
   1.468 +  oggpack_write(opb,0x03,8);
   1.469 +  _v_writestring(opb,"vorbis", 6);
   1.470 +
   1.471 +  /* vendor */
   1.472 +  oggpack_write(opb,bytes,32);
   1.473 +  _v_writestring(opb,ENCODE_VENDOR_STRING, bytes);
   1.474 +
   1.475 +  /* comments */
   1.476 +
   1.477 +  oggpack_write(opb,vc->comments,32);
   1.478 +  if(vc->comments){
   1.479 +    int i;
   1.480 +    for(i=0;i<vc->comments;i++){
   1.481 +      if(vc->user_comments[i]){
   1.482 +        oggpack_write(opb,vc->comment_lengths[i],32);
   1.483 +        _v_writestring(opb,vc->user_comments[i], vc->comment_lengths[i]);
   1.484 +      }else{
   1.485 +        oggpack_write(opb,0,32);
   1.486 +      }
   1.487 +    }
   1.488 +  }
   1.489 +  oggpack_write(opb,1,1);
   1.490 +
   1.491 +  return(0);
   1.492 +}
   1.493 +
   1.494 +static int _vorbis_pack_books(oggpack_buffer *opb,vorbis_info *vi){
   1.495 +  codec_setup_info     *ci=vi->codec_setup;
   1.496 +  int i;
   1.497 +  if(!ci)return(OV_EFAULT);
   1.498 +
   1.499 +  oggpack_write(opb,0x05,8);
   1.500 +  _v_writestring(opb,"vorbis", 6);
   1.501 +
   1.502 +  /* books */
   1.503 +  oggpack_write(opb,ci->books-1,8);
   1.504 +  for(i=0;i<ci->books;i++)
   1.505 +    if(vorbis_staticbook_pack(ci->book_param[i],opb))goto err_out;
   1.506 +
   1.507 +  /* times; hook placeholders */
   1.508 +  oggpack_write(opb,0,6);
   1.509 +  oggpack_write(opb,0,16);
   1.510 +
   1.511 +  /* floors */
   1.512 +  oggpack_write(opb,ci->floors-1,6);
   1.513 +  for(i=0;i<ci->floors;i++){
   1.514 +    oggpack_write(opb,ci->floor_type[i],16);
   1.515 +    if(_floor_P[ci->floor_type[i]]->pack)
   1.516 +      _floor_P[ci->floor_type[i]]->pack(ci->floor_param[i],opb);
   1.517 +    else
   1.518 +      goto err_out;
   1.519 +  }
   1.520 +
   1.521 +  /* residues */
   1.522 +  oggpack_write(opb,ci->residues-1,6);
   1.523 +  for(i=0;i<ci->residues;i++){
   1.524 +    oggpack_write(opb,ci->residue_type[i],16);
   1.525 +    _residue_P[ci->residue_type[i]]->pack(ci->residue_param[i],opb);
   1.526 +  }
   1.527 +
   1.528 +  /* maps */
   1.529 +  oggpack_write(opb,ci->maps-1,6);
   1.530 +  for(i=0;i<ci->maps;i++){
   1.531 +    oggpack_write(opb,ci->map_type[i],16);
   1.532 +    _mapping_P[ci->map_type[i]]->pack(vi,ci->map_param[i],opb);
   1.533 +  }
   1.534 +
   1.535 +  /* modes */
   1.536 +  oggpack_write(opb,ci->modes-1,6);
   1.537 +  for(i=0;i<ci->modes;i++){
   1.538 +    oggpack_write(opb,ci->mode_param[i]->blockflag,1);
   1.539 +    oggpack_write(opb,ci->mode_param[i]->windowtype,16);
   1.540 +    oggpack_write(opb,ci->mode_param[i]->transformtype,16);
   1.541 +    oggpack_write(opb,ci->mode_param[i]->mapping,8);
   1.542 +  }
   1.543 +  oggpack_write(opb,1,1);
   1.544 +
   1.545 +  return(0);
   1.546 +err_out:
   1.547 +  return(-1);
   1.548 +}
   1.549 +
   1.550 +int vorbis_commentheader_out(vorbis_comment *vc,
   1.551 +                                          ogg_packet *op){
   1.552 +
   1.553 +  oggpack_buffer opb;
   1.554 +
   1.555 +  oggpack_writeinit(&opb);
   1.556 +  if(_vorbis_pack_comment(&opb,vc)){
   1.557 +    oggpack_writeclear(&opb);
   1.558 +    return OV_EIMPL;
   1.559 +  }
   1.560 +
   1.561 +  op->packet = _ogg_malloc(oggpack_bytes(&opb));
   1.562 +  memcpy(op->packet, opb.buffer, oggpack_bytes(&opb));
   1.563 +
   1.564 +  op->bytes=oggpack_bytes(&opb);
   1.565 +  op->b_o_s=0;
   1.566 +  op->e_o_s=0;
   1.567 +  op->granulepos=0;
   1.568 +  op->packetno=1;
   1.569 +
   1.570 +  oggpack_writeclear(&opb);
   1.571 +  return 0;
   1.572 +}
   1.573 +
   1.574 +int vorbis_analysis_headerout(vorbis_dsp_state *v,
   1.575 +                              vorbis_comment *vc,
   1.576 +                              ogg_packet *op,
   1.577 +                              ogg_packet *op_comm,
   1.578 +                              ogg_packet *op_code){
   1.579 +  int ret=OV_EIMPL;
   1.580 +  vorbis_info *vi=v->vi;
   1.581 +  oggpack_buffer opb;
   1.582 +  private_state *b=v->backend_state;
   1.583 +
   1.584 +  if(!b){
   1.585 +    ret=OV_EFAULT;
   1.586 +    goto err_out;
   1.587 +  }
   1.588 +
   1.589 +  /* first header packet **********************************************/
   1.590 +
   1.591 +  oggpack_writeinit(&opb);
   1.592 +  if(_vorbis_pack_info(&opb,vi))goto err_out;
   1.593 +
   1.594 +  /* build the packet */
   1.595 +  if(b->header)_ogg_free(b->header);
   1.596 +  b->header=_ogg_malloc(oggpack_bytes(&opb));
   1.597 +  memcpy(b->header,opb.buffer,oggpack_bytes(&opb));
   1.598 +  op->packet=b->header;
   1.599 +  op->bytes=oggpack_bytes(&opb);
   1.600 +  op->b_o_s=1;
   1.601 +  op->e_o_s=0;
   1.602 +  op->granulepos=0;
   1.603 +  op->packetno=0;
   1.604 +
   1.605 +  /* second header packet (comments) **********************************/
   1.606 +
   1.607 +  oggpack_reset(&opb);
   1.608 +  if(_vorbis_pack_comment(&opb,vc))goto err_out;
   1.609 +
   1.610 +  if(b->header1)_ogg_free(b->header1);
   1.611 +  b->header1=_ogg_malloc(oggpack_bytes(&opb));
   1.612 +  memcpy(b->header1,opb.buffer,oggpack_bytes(&opb));
   1.613 +  op_comm->packet=b->header1;
   1.614 +  op_comm->bytes=oggpack_bytes(&opb);
   1.615 +  op_comm->b_o_s=0;
   1.616 +  op_comm->e_o_s=0;
   1.617 +  op_comm->granulepos=0;
   1.618 +  op_comm->packetno=1;
   1.619 +
   1.620 +  /* third header packet (modes/codebooks) ****************************/
   1.621 +
   1.622 +  oggpack_reset(&opb);
   1.623 +  if(_vorbis_pack_books(&opb,vi))goto err_out;
   1.624 +
   1.625 +  if(b->header2)_ogg_free(b->header2);
   1.626 +  b->header2=_ogg_malloc(oggpack_bytes(&opb));
   1.627 +  memcpy(b->header2,opb.buffer,oggpack_bytes(&opb));
   1.628 +  op_code->packet=b->header2;
   1.629 +  op_code->bytes=oggpack_bytes(&opb);
   1.630 +  op_code->b_o_s=0;
   1.631 +  op_code->e_o_s=0;
   1.632 +  op_code->granulepos=0;
   1.633 +  op_code->packetno=2;
   1.634 +
   1.635 +  oggpack_writeclear(&opb);
   1.636 +  return(0);
   1.637 + err_out:
   1.638 +  memset(op,0,sizeof(*op));
   1.639 +  memset(op_comm,0,sizeof(*op_comm));
   1.640 +  memset(op_code,0,sizeof(*op_code));
   1.641 +
   1.642 +  if(b){
   1.643 +    oggpack_writeclear(&opb);
   1.644 +    if(b->header)_ogg_free(b->header);
   1.645 +    if(b->header1)_ogg_free(b->header1);
   1.646 +    if(b->header2)_ogg_free(b->header2);
   1.647 +    b->header=NULL;
   1.648 +    b->header1=NULL;
   1.649 +    b->header2=NULL;
   1.650 +  }
   1.651 +  return(ret);
   1.652 +}
   1.653 +
   1.654 +double vorbis_granule_time(vorbis_dsp_state *v,ogg_int64_t granulepos){
   1.655 +  if(granulepos == -1) return -1;
   1.656 +
   1.657 +  /* We're not guaranteed a 64 bit unsigned type everywhere, so we
   1.658 +     have to put the unsigned granpo in a signed type. */
   1.659 +  if(granulepos>=0){
   1.660 +    return((double)granulepos/v->vi->rate);
   1.661 +  }else{
   1.662 +    ogg_int64_t granuleoff=0xffffffff;
   1.663 +    granuleoff<<=31;
   1.664 +    granuleoff|=0x7ffffffff;
   1.665 +    return(((double)granulepos+2+granuleoff+granuleoff)/v->vi->rate);
   1.666 +  }
   1.667 +}
   1.668 +
   1.669 +const char *vorbis_version_string(void){
   1.670 +  return GENERAL_VENDOR_STRING;
   1.671 +}