snd_ogg.c

   1 /*
   2         Copyright (C) 2003-2005  Mathieu Olivier
   3
   4         This program is free software; you can redistribute it and/or
   5         modify it under the terms of the GNU General Public License
   6         as published by the Free Software Foundation; either version 2
   7         of the License, or (at your option) any later version.
   8
   9         This program is distributed in the hope that it will be useful,
  10         but WITHOUT ANY WARRANTY; without even the implied warranty of
  11         MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  12
  13         See the GNU General Public License for more details.
  14
  15         You should have received a copy of the GNU General Public License
  16         along with this program; if not, write to:
  17
  18                 Free Software Foundation, Inc.
  19                 59 Temple Place - Suite 330
  20                 Boston, MA  02111-1307, USA
  21
  22 */
  23
  24
  25 #include "quakedef.h"
  26 #include "snd_main.h"
  27 #include "snd_ogg.h"
  28 #include "snd_wav.h"
  29
  30
  31 /*
  32 =================================================================
  33
  34   Minimal set of definitions from the Ogg Vorbis lib
  35   (C) COPYRIGHT 1994-2001 by the XIPHOPHORUS Company
  36   http://www.xiph.org/
  37
  38   WARNING: for a matter of simplicity, several pointer types are
  39   casted to "void*", and most enumerated values are not included
  40
  41 =================================================================
  42 */
  43
  44 #ifdef _MSC_VER
  45 typedef __int64 ogg_int64_t;
  46 #else
  47 typedef long long ogg_int64_t;
  48 #endif
  49
  50 typedef struct
  51 {
  52         size_t  (*read_func)    (void *ptr, size_t size, size_t nmemb, void *datasource);
  53         int             (*seek_func)    (void *datasource, ogg_int64_t offset, int whence);
  54         int             (*close_func)   (void *datasource);
  55         long    (*tell_func)    (void *datasource);
  56 } ov_callbacks;
  57
  58 typedef struct
  59 {
  60         unsigned char   *data;
  61         int                             storage;
  62         int                             fill;
  63         int                             returned;
  64         int                             unsynced;
  65         int                             headerbytes;
  66         int                             bodybytes;
  67 } ogg_sync_state;
  68
  69 typedef struct
  70 {
  71         int             version;
  72         int             channels;
  73         long    rate;
  74         long    bitrate_upper;
  75         long    bitrate_nominal;
  76         long    bitrate_lower;
  77         long    bitrate_window;
  78         void    *codec_setup;
  79 } vorbis_info;
  80
  81 typedef struct
  82 {
  83         unsigned char   *body_data;
  84         long                    body_storage;
  85         long                    body_fill;
  86         long                    body_returned;
  87         int                             *lacing_vals;
  88         ogg_int64_t             *granule_vals;
  89         long                    lacing_storage;
  90         long                    lacing_fill;
  91         long                    lacing_packet;
  92         long                    lacing_returned;
  93         unsigned char   header[282];
  94         int                             header_fill;
  95         int                             e_o_s;
  96         int                             b_o_s;
  97         long                    serialno;
  98         long                    pageno;
  99         ogg_int64_t             packetno;
 100         ogg_int64_t             granulepos;
 101 } ogg_stream_state;
 102
 103 typedef struct
 104 {
 105         int                     analysisp;
 106         vorbis_info     *vi;
 107         float           **pcm;
 108         float           **pcmret;
 109         int                     pcm_storage;
 110         int                     pcm_current;
 111         int                     pcm_returned;
 112         int                     preextrapolate;
 113         int                     eofflag;
 114         long            lW;
 115         long            W;
 116         long            nW;
 117         long            centerW;
 118         ogg_int64_t     granulepos;
 119         ogg_int64_t     sequence;
 120         ogg_int64_t     glue_bits;
 121         ogg_int64_t     time_bits;
 122         ogg_int64_t     floor_bits;
 123         ogg_int64_t     res_bits;
 124         void            *backend_state;
 125 } vorbis_dsp_state;
 126
 127 typedef struct
 128 {
 129         long                    endbyte;
 130         int                             endbit;
 131         unsigned char   *buffer;
 132         unsigned char   *ptr;
 133         long                    storage;
 134 } oggpack_buffer;
 135
 136 typedef struct
 137 {
 138         float                           **pcm;
 139         oggpack_buffer          opb;
 140         long                            lW;
 141         long                            W;
 142         long                            nW;
 143         int                                     pcmend;
 144         int                                     mode;
 145         int                                     eofflag;
 146         ogg_int64_t                     granulepos;
 147         ogg_int64_t                     sequence;
 148         vorbis_dsp_state        *vd;
 149         void                            *localstore;
 150         long                            localtop;
 151         long                            localalloc;
 152         long                            totaluse;
 153         void                            *reap;  // VOIDED POINTER
 154         long                            glue_bits;
 155         long                            time_bits;
 156         long                            floor_bits;
 157         long                            res_bits;
 158         void                            *internal;
 159 } vorbis_block;
 160
 161 typedef struct
 162 {
 163         void                            *datasource;
 164         int                                     seekable;
 165         ogg_int64_t                     offset;
 166         ogg_int64_t                     end;
 167         ogg_sync_state          oy;
 168         int                                     links;
 169         ogg_int64_t                     *offsets;
 170         ogg_int64_t                     *dataoffsets;
 171         long                            *serialnos;
 172         ogg_int64_t                     *pcmlengths;
 173         vorbis_info                     *vi;
 174         void                            *vc;  // VOIDED POINTER
 175         ogg_int64_t                     pcm_offset;
 176         int                                     ready_state;
 177         long                            current_serialno;
 178         int                                     current_link;
 179         double                          bittrack;
 180         double                          samptrack;
 181         ogg_stream_state        os;
 182         vorbis_dsp_state        vd;
 183         vorbis_block            vb;
 184         ov_callbacks            callbacks;
 185 } OggVorbis_File;
 186
 187
 188 /*
 189 =================================================================
 190
 191   DarkPlaces definitions
 192
 193 =================================================================
 194 */
 195
 196 // Functions exported from the vorbisfile library
 197 static int (*qov_clear) (OggVorbis_File *vf);
 198 static vorbis_info* (*qov_info) (OggVorbis_File *vf,int link);
 199 static int (*qov_open_callbacks) (void *datasource, OggVorbis_File *vf,
 200                                                                   char *initial, long ibytes,
 201                                                                   ov_callbacks callbacks);
 202 static int (*qov_pcm_seek) (OggVorbis_File *vf,ogg_int64_t pos);
 203 static ogg_int64_t (*qov_pcm_total) (OggVorbis_File *vf,int i);
 204 static long (*qov_read) (OggVorbis_File *vf,char *buffer,int length,
 205                                                  int bigendianp,int word,int sgned,int *bitstream);
 206
 207 static dllfunction_t oggvorbisfuncs[] =
 208 {
 209         {"ov_clear",                    (void **) &qov_clear},
 210         {"ov_info",                             (void **) &qov_info},
 211         {"ov_open_callbacks",   (void **) &qov_open_callbacks},
 212         {"ov_pcm_seek",                 (void **) &qov_pcm_seek},
 213         {"ov_pcm_total",                (void **) &qov_pcm_total},
 214         {"ov_read",                             (void **) &qov_read},
 215         {NULL, NULL}
 216 };
 217
 218 // Handles for the Vorbis and Vorbisfile DLLs
 219 static dllhandle_t vo_dll = NULL;
 220 static dllhandle_t vf_dll = NULL;
 221
 222 typedef struct
 223 {
 224         unsigned char *buffer;
 225         ogg_int64_t ind, buffsize;
 226 } ov_decode_t;
 227
 228
 229 static size_t ovcb_read (void *ptr, size_t size, size_t nb, void *datasource)
 230 {
 231         ov_decode_t *ov_decode = (ov_decode_t*)datasource;
 232         size_t remain, len;
 233
 234         remain = ov_decode->buffsize - ov_decode->ind;
 235         len = size * nb;
 236         if (remain < len)
 237                 len = remain - remain % size;
 238
 239         memcpy (ptr, ov_decode->buffer + ov_decode->ind, len);
 240         ov_decode->ind += len;
 241
 242         return len / size;
 243 }
 244
 245 static int ovcb_seek (void *datasource, ogg_int64_t offset, int whence)
 246 {
 247         ov_decode_t *ov_decode = (ov_decode_t*)datasource;
 248
 249         switch (whence)
 250         {
 251                 case SEEK_SET:
 252                         break;
 253                 case SEEK_CUR:
 254                         offset += ov_decode->ind;
 255                         break;
 256                 case SEEK_END:
 257                         offset += ov_decode->buffsize;
 258                         break;
 259                 default:
 260                         return -1;
 261         }
 262         if (offset < 0 || offset > ov_decode->buffsize)
 263                 return -1;
 264
 265         ov_decode->ind = offset;
 266         return 0;
 267 }
 268
 269 static int ovcb_close (void *ov_decode)
 270 {
 271         return 0;
 272 }
 273
 274 static long ovcb_tell (void *ov_decode)
 275 {
 276         return ((ov_decode_t*)ov_decode)->ind;
 277 }
 278
 279
 280 /*
 281 =================================================================
 282
 283   DLL load & unload
 284
 285 =================================================================
 286 */
 287
 288 /*
 289 ====================
 290 OGG_OpenLibrary
 291
 292 Try to load the VorbisFile DLL
 293 ====================
 294 */
 295 qboolean OGG_OpenLibrary (void)
 296 {
 297         const char* dllnames_vo [] =
 298         {
 299 #if defined(WIN64)
 300                 "libvorbis64.dll",
 301 #elif defined(WIN32)
 302                 "libvorbis.dll",
 303                 "vorbis.dll",
 304 #elif defined(MACOSX)
 305                 "libvorbis.dylib",
 306 #else
 307                 "libvorbis.so.0",
 308                 "libvorbis.so",
 309 #endif
 310                 NULL
 311         };
 312         const char* dllnames_vf [] =
 313         {
 314 #if defined(WIN64)
 315                 "libvorbisfile64.dll",
 316 #elif defined(WIN32)
 317                 "libvorbisfile.dll",
 318                 "vorbisfile.dll",
 319 #elif defined(MACOSX)
 320                 "libvorbisfile.dylib",
 321 #else
 322                 "libvorbisfile.so.3",
 323                 "libvorbisfile.so",
 324 #endif
 325                 NULL
 326         };
 327
 328         // Already loaded?
 329         if (vf_dll)
 330                 return true;
 331
 332 // COMMANDLINEOPTION: Sound: -novorbis disables ogg vorbis sound support
 333         if (COM_CheckParm("-novorbis"))
 334                 return false;
 335
 336         // Load the DLLs
 337         // We need to load both by hand because some OSes seem to not load
 338         // the vorbis DLL automatically when loading the VorbisFile DLL
 339         if (! Sys_LoadLibrary (dllnames_vo, &vo_dll, NULL) ||
 340                 ! Sys_LoadLibrary (dllnames_vf, &vf_dll, oggvorbisfuncs))
 341         {
 342                 Sys_UnloadLibrary (&vo_dll);
 343                 Con_Printf ("Ogg Vorbis support disabled\n");
 344                 return false;
 345         }
 346
 347         Con_Printf ("Ogg Vorbis support enabled\n");
 348         return true;
 349 }
 350
 351
 352 /*
 353 ====================
 354 OGG_CloseLibrary
 355
 356 Unload the VorbisFile DLL
 357 ====================
 358 */
 359 void OGG_CloseLibrary (void)
 360 {
 361         Sys_UnloadLibrary (&vf_dll);
 362         Sys_UnloadLibrary (&vo_dll);
 363 }
 364
 365
 366 /*
 367 =================================================================
 368
 369         Ogg Vorbis decoding
 370
 371 =================================================================
 372 */
 373
 374 #define STREAM_BUFFER_DURATION 1.5f     // 1.5 sec
 375 #define STREAM_BUFFER_SIZE(format_ptr) ((int)(ceil (STREAM_BUFFER_DURATION * ((format_ptr)->speed * (format_ptr)->width * (format_ptr)->channels))))
 376
 377 // We work with 1 sec sequences, so this buffer must be able to contain
 378 // 1 sec of sound of the highest quality (48 KHz, 16 bit samples, stereo)
 379 static unsigned char resampling_buffer [48000 * 2 * 2];
 380
 381
 382 // Per-sfx data structure
 383 typedef struct
 384 {
 385         unsigned char   *file;
 386         size_t                  filesize;
 387         snd_format_t    format;
 388 } ogg_stream_persfx_t;
 389
 390 // Per-channel data structure
 391 typedef struct
 392 {
 393         OggVorbis_File  vf;
 394         ov_decode_t             ov_decode;
 395         unsigned int    sb_offset;
 396         int                             bs;
 397         snd_buffer_t    sb;             // must be at the end due to its dynamically allocated size
 398 } ogg_stream_perchannel_t;
 399
 400
 401 static const ov_callbacks callbacks = {ovcb_read, ovcb_seek, ovcb_close, ovcb_tell};
 402
 403 /*
 404 ====================
 405 OGG_FetchSound
 406 ====================
 407 */
 408 static const snd_buffer_t* OGG_FetchSound (channel_t* ch, unsigned int* start, unsigned int nbsampleframes)
 409 {
 410         ogg_stream_perchannel_t* per_ch;
 411         sfx_t* sfx;
 412         ogg_stream_persfx_t* per_sfx;
 413         snd_format_t* ogg_format;
 414         snd_buffer_t* sb;
 415         int newlength, done, ret, bigendian;
 416         unsigned int real_start;
 417         unsigned int factor;
 418
 419         per_ch = (ogg_stream_perchannel_t *)ch->fetcher_data;
 420         sfx = ch->sfx;
 421         per_sfx = (ogg_stream_persfx_t *)sfx->fetcher_data;
 422         ogg_format = &per_sfx->format;
 423
 424         // If there's no fetcher structure attached to the channel yet
 425         if (per_ch == NULL)
 426         {
 427                 size_t buff_len, memsize;
 428
 429                 buff_len = STREAM_BUFFER_SIZE(ogg_format);
 430                 memsize = sizeof (*per_ch) - sizeof (per_ch->sb.samples) + buff_len;
 431                 per_ch = (ogg_stream_perchannel_t *)Mem_Alloc (snd_mempool, memsize);
 432                 sfx->memsize += memsize;
 433
 434                 // Open it with the VorbisFile API
 435                 per_ch->ov_decode.buffer = per_sfx->file;
 436                 per_ch->ov_decode.ind = 0;
 437                 per_ch->ov_decode.buffsize = per_sfx->filesize;
 438                 if (qov_open_callbacks (&per_ch->ov_decode, &per_ch->vf, NULL, 0, callbacks) < 0)
 439                 {
 440                         Con_Printf("error while reading Ogg Vorbis stream \"%s\"\n", sfx->name);
 441                         Mem_Free (per_ch);
 442                         return NULL;
 443                 }
 444                 per_ch->bs = 0;
 445
 446                 per_ch->sb_offset = 0;
 447                 per_ch->sb.format.speed = snd_renderbuffer->format.speed;
 448                 per_ch->sb.format.width = ogg_format->width;
 449                 per_ch->sb.format.channels = ogg_format->channels;
 450                 per_ch->sb.nbframes = 0;
 451                 per_ch->sb.maxframes = buff_len / (per_ch->sb.format.channels * per_ch->sb.format.width);
 452
 453                 ch->fetcher_data = per_ch;
 454         }
 455
 456         real_start = *start;
 457
 458         sb = &per_ch->sb;
 459         factor = per_sfx->format.width * per_sfx->format.channels;
 460
 461         // If the stream buffer can't contain that much samples anyway
 462         if (nbsampleframes > sb->maxframes)
 463         {
 464                 Con_Printf ("OGG_FetchSound: stream buffer too small (%u sample frames required)\n", nbsampleframes);
 465                 return NULL;
 466         }
 467
 468         // If the data we need has already been decompressed in the sfxbuffer, just return it
 469         if (per_ch->sb_offset <= real_start && per_ch->sb_offset + sb->nbframes >= real_start + nbsampleframes)
 470         {
 471                 *start = per_ch->sb_offset;
 472                 return sb;
 473         }
 474
 475         newlength = (int)(per_ch->sb_offset + sb->nbframes) - real_start;
 476
 477         // If we need to skip some data before decompressing the rest, or if the stream has looped
 478         if (newlength < 0 || per_ch->sb_offset > real_start)
 479         {
 480                 unsigned int time_start;
 481                 ogg_int64_t ogg_start;
 482                 int err;
 483
 484                 if (real_start > sfx->total_length)
 485                 {
 486                         Con_Printf ("OGG_FetchSound: asked for a start position after the end of the sfx! (%u > %u)\n",
 487                                                 real_start, sfx->total_length);
 488                         return NULL;
 489                 }
 490
 491                 // We work with 200ms (1/5 sec) steps to avoid rounding errors
 492                 time_start = real_start * 5 / snd_renderbuffer->format.speed;
 493                 ogg_start = time_start * (per_sfx->format.speed / 5);
 494                 err = qov_pcm_seek (&per_ch->vf, ogg_start);
 495                 if (err != 0)
 496                 {
 497                         Con_Printf ("OGG_FetchSound: qov_pcm_seek(..., %d) returned %d\n",
 498                                                 real_start, err);
 499                         return NULL;
 500                 }
 501                 sb->nbframes = 0;
 502
 503                 real_start = (float)ogg_start / per_sfx->format.speed * snd_renderbuffer->format.speed;
 504                 if (*start - real_start + nbsampleframes > sb->maxframes)
 505                 {
 506                         Con_Printf ("OGG_FetchSound: stream buffer too small after seek (%u sample frames required)\n",
 507                                                 *start - real_start + nbsampleframes);
 508                         per_ch->sb_offset = real_start;
 509                         return NULL;
 510                 }
 511         }
 512         // Else, move forward the samples we need to keep in the sound buffer
 513         else
 514         {
 515                 memmove (sb->samples, sb->samples + (real_start - per_ch->sb_offset) * factor, newlength * factor);
 516                 sb->nbframes = newlength;
 517         }
 518
 519         per_ch->sb_offset = real_start;
 520
 521         // We add exactly 1 sec of sound to the buffer:
 522         // 1- to ensure we won't lose any sample during the resampling process
 523         // 2- to force one call to OGG_FetchSound per second to regulate the workload
 524         if (sb->format.speed + sb->nbframes > sb->maxframes)
 525         {
 526                 Con_Printf ("OGG_FetchSound: stream buffer overflow (%u sample frames / %u)\n",
 527                                         sb->format.speed + sb->nbframes, sb->maxframes);
 528                 return NULL;
 529         }
 530         newlength = per_sfx->format.speed * factor;  // -> 1 sec of sound before resampling
 531
 532         // Decompress in the resampling_buffer
 533 #if BYTE_ORDER == BIG_ENDIAN
 534         bigendian = 1;
 535 #else
 536         bigendian = 0;
 537 #endif
 538         done = 0;
 539         while ((ret = qov_read (&per_ch->vf, (char *)&resampling_buffer[done], (int)(newlength - done), bigendian, 2, 1, &per_ch->bs)) > 0)
 540                 done += ret;
 541
 542         Snd_AppendToSndBuffer (sb, resampling_buffer, (size_t)done / (size_t)factor, &per_sfx->format);
 543
 544         *start = per_ch->sb_offset;
 545         return sb;
 546 }
 547
 548
 549 /*
 550 ====================
 551 OGG_FetchEnd
 552 ====================
 553 */
 554 static void OGG_FetchEnd (channel_t* ch)
 555 {
 556         ogg_stream_perchannel_t* per_ch;
 557
 558         per_ch = (ogg_stream_perchannel_t *)ch->fetcher_data;
 559         if (per_ch != NULL)
 560         {
 561                 size_t buff_len;
 562
 563                 // Free the ogg vorbis decoder
 564                 qov_clear (&per_ch->vf);
 565
 566                 buff_len = per_ch->sb.maxframes * per_ch->sb.format.channels * per_ch->sb.format.width;
 567                 ch->sfx->memsize -= sizeof (*per_ch) - sizeof (per_ch->sb.samples) + buff_len;
 568
 569                 Mem_Free (per_ch);
 570                 ch->fetcher_data = NULL;
 571         }
 572 }
 573
 574
 575 /*
 576 ====================
 577 OGG_FreeSfx
 578 ====================
 579 */
 580 static void OGG_FreeSfx (sfx_t* sfx)
 581 {
 582         ogg_stream_persfx_t* per_sfx = (ogg_stream_persfx_t *)sfx->fetcher_data;
 583
 584         // Free the Ogg Vorbis file
 585         Mem_Free(per_sfx->file);
 586         sfx->memsize -= per_sfx->filesize;
 587
 588         // Free the stream structure
 589         Mem_Free(per_sfx);
 590         sfx->memsize -= sizeof (*per_sfx);
 591
 592         sfx->fetcher_data = NULL;
 593         sfx->fetcher = NULL;
 594 }
 595
 596
 597 /*
 598 ====================
 599 OGG_GetFormat
 600 ====================
 601 */
 602 static const snd_format_t* OGG_GetFormat (sfx_t* sfx)
 603 {
 604         ogg_stream_persfx_t* per_sfx = (ogg_stream_persfx_t *)sfx->fetcher_data;
 605         return &per_sfx->format;
 606 }
 607
 608 static const snd_fetcher_t ogg_fetcher = { OGG_FetchSound, OGG_FetchEnd, OGG_FreeSfx, OGG_GetFormat };
 609
 610
 611 /*
 612 ====================
 613 OGG_LoadVorbisFile
 614
 615 Load an Ogg Vorbis file into memory
 616 ====================
 617 */
 618 qboolean OGG_LoadVorbisFile (const char *filename, sfx_t *sfx)
 619 {
 620         unsigned char *data;
 621         fs_offset_t filesize;
 622         ov_decode_t ov_decode;
 623         OggVorbis_File vf;
 624         vorbis_info *vi;
 625         ogg_int64_t len, buff_len;
 626
 627         if (!vf_dll)
 628                 return false;
 629
 630         // Already loaded?
 631         if (sfx->fetcher != NULL)
 632                 return true;
 633
 634         // Load the file
 635         data = FS_LoadFile (filename, snd_mempool, false, &filesize);
 636         if (data == NULL)
 637                 return false;
 638
 639         Con_DPrintf ("Loading Ogg Vorbis file \"%s\"\n", filename);
 640
 641         // Open it with the VorbisFile API
 642         ov_decode.buffer = data;
 643         ov_decode.ind = 0;
 644         ov_decode.buffsize = filesize;
 645         if (qov_open_callbacks (&ov_decode, &vf, NULL, 0, callbacks) < 0)
 646         {
 647                 Con_Printf ("error while opening Ogg Vorbis file \"%s\"\n", filename);
 648                 Mem_Free(data);
 649                 return false;
 650         }
 651
 652         // Get the stream information
 653         vi = qov_info (&vf, -1);
 654         if (vi->channels < 1 || vi->channels > 2)
 655         {
 656                 Con_Printf("%s has an unsupported number of channels (%i)\n",
 657                                         sfx->name, vi->channels);
 658                 qov_clear (&vf);
 659                 Mem_Free(data);
 660                 return false;
 661         }
 662
 663         len = qov_pcm_total (&vf, -1) * vi->channels * 2;  // 16 bits => "* 2"
 664
 665         // Decide if we go for a stream or a simple PCM cache
 666         buff_len = (int)ceil (STREAM_BUFFER_DURATION * (snd_renderbuffer->format.speed * 2 * vi->channels));
 667         if (snd_streaming.integer && len > (ogg_int64_t)filesize + 3 * buff_len)
 668         {
 669                 ogg_stream_persfx_t* per_sfx;
 670
 671                 Con_DPrintf ("\"%s\" will be streamed\n", filename);
 672                 per_sfx = (ogg_stream_persfx_t *)Mem_Alloc (snd_mempool, sizeof (*per_sfx));
 673                 sfx->memsize += sizeof (*per_sfx);
 674                 per_sfx->file = data;
 675                 per_sfx->filesize = filesize;
 676                 sfx->memsize += filesize;
 677
 678                 per_sfx->format.speed = vi->rate;
 679                 per_sfx->format.width = 2;  // We always work with 16 bits samples
 680                 per_sfx->format.channels = vi->channels;
 681
 682                 sfx->fetcher_data = per_sfx;
 683                 sfx->fetcher = &ogg_fetcher;
 684                 sfx->loopstart = -1;
 685                 sfx->flags |= SFXFLAG_STREAMED;
 686                 sfx->total_length = (int)((size_t)len / (per_sfx->format.channels * 2) * ((double)snd_renderbuffer->format.speed / per_sfx->format.speed));
 687         }
 688         else
 689         {
 690                 char *buff;
 691                 ogg_int64_t done;
 692                 int bs, bigendian;
 693                 long ret;
 694                 snd_buffer_t *sb;
 695                 snd_format_t ogg_format;
 696
 697                 Con_DPrintf ("\"%s\" will be cached\n", filename);
 698
 699                 // Decode it
 700                 buff = (char *)Mem_Alloc (snd_mempool, (int)len);
 701                 done = 0;
 702                 bs = 0;
 703 #if BYTE_ORDER == BIG_ENDIAN
 704                 bigendian = 1;
 705 #else
 706                 bigendian = 0;
 707 #endif
 708                 while ((ret = qov_read (&vf, &buff[done], (int)(len - done), bigendian, 2, 1, &bs)) > 0)
 709                         done += ret;
 710
 711                 // Build the sound buffer
 712                 ogg_format.speed = vi->rate;
 713                 ogg_format.channels = vi->channels;
 714                 ogg_format.width = 2;  // We always work with 16 bits samples
 715                 sb = Snd_CreateSndBuffer ((unsigned char *)buff, (size_t)done / (vi->channels * 2), &ogg_format, snd_renderbuffer->format.speed);
 716                 if (sb == NULL)
 717                 {
 718                         qov_clear (&vf);
 719                         Mem_Free (data);
 720                         Mem_Free (buff);
 721                         return false;
 722                 }
 723
 724                 sfx->fetcher = &wav_fetcher;
 725                 sfx->fetcher_data = sb;
 726
 727                 sfx->total_length = sb->nbframes;
 728                 sfx->memsize += sb->maxframes * sb->format.channels * sb->format.width + sizeof (*sb) - sizeof (sb->samples);
 729
 730                 sfx->loopstart = -1;
 731                 sfx->flags &= ~SFXFLAG_STREAMED;
 732
 733                 qov_clear (&vf);
 734                 Mem_Free (data);
 735                 Mem_Free (buff);
 736         }
 737
 738         return true;
 739 }