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         char **user_comments;
 164         int   *comment_lengths;
 165         int    comments;
 166         char  *vendor;
 167 } vorbis_comment;
 168
 169 typedef struct
 170 {
 171         void                            *datasource;
 172         int                                     seekable;
 173         ogg_int64_t                     offset;
 174         ogg_int64_t                     end;
 175         ogg_sync_state          oy;
 176         int                                     links;
 177         ogg_int64_t                     *offsets;
 178         ogg_int64_t                     *dataoffsets;
 179         long                            *serialnos;
 180         ogg_int64_t                     *pcmlengths;
 181         vorbis_info                     *vi;
 182         vorbis_comment          *vc;
 183         ogg_int64_t                     pcm_offset;
 184         int                                     ready_state;
 185         long                            current_serialno;
 186         int                                     current_link;
 187         double                          bittrack;
 188         double                          samptrack;
 189         ogg_stream_state        os;
 190         vorbis_dsp_state        vd;
 191         vorbis_block            vb;
 192         ov_callbacks            callbacks;
 193 } OggVorbis_File;
 194
 195
 196 /*
 197 =================================================================
 198
 199   DarkPlaces definitions
 200
 201 =================================================================
 202 */
 203
 204 // Functions exported from the vorbisfile library
 205 static int (*qov_clear) (OggVorbis_File *vf);
 206 static vorbis_info* (*qov_info) (OggVorbis_File *vf,int link);
 207 static vorbis_comment* (*qov_comment) (OggVorbis_File *vf,int link);
 208 static char * (*qvorbis_comment_query) (vorbis_comment *vc, char *tag, int count);
 209 static int (*qov_open_callbacks) (void *datasource, OggVorbis_File *vf,
 210                                                                   char *initial, long ibytes,
 211                                                                   ov_callbacks callbacks);
 212 static int (*qov_pcm_seek) (OggVorbis_File *vf,ogg_int64_t pos);
 213 static ogg_int64_t (*qov_pcm_total) (OggVorbis_File *vf,int i);
 214 static long (*qov_read) (OggVorbis_File *vf,char *buffer,int length,
 215                                                  int bigendianp,int word,int sgned,int *bitstream);
 216
 217 static dllfunction_t vorbisfilefuncs[] =
 218 {
 219         {"ov_clear",                            (void **) &qov_clear},
 220         {"ov_info",                                     (void **) &qov_info},
 221         {"ov_comment",                          (void **) &qov_comment},
 222         {"ov_open_callbacks",           (void **) &qov_open_callbacks},
 223         {"ov_pcm_seek",                         (void **) &qov_pcm_seek},
 224         {"ov_pcm_total",                        (void **) &qov_pcm_total},
 225         {"ov_read",                                     (void **) &qov_read},
 226         {NULL, NULL}
 227 };
 228
 229 static dllfunction_t vorbisfuncs[] =
 230 {
 231         {"vorbis_comment_query",        (void **) &qvorbis_comment_query},
 232         {NULL, NULL}
 233 };
 234
 235 // Handles for the Vorbis and Vorbisfile DLLs
 236 static dllhandle_t vo_dll = NULL;
 237 static dllhandle_t vf_dll = NULL;
 238
 239 typedef struct
 240 {
 241         unsigned char *buffer;
 242         ogg_int64_t ind, buffsize;
 243 } ov_decode_t;
 244
 245
 246 static size_t ovcb_read (void *ptr, size_t size, size_t nb, void *datasource)
 247 {
 248         ov_decode_t *ov_decode = (ov_decode_t*)datasource;
 249         size_t remain, len;
 250
 251         remain = ov_decode->buffsize - ov_decode->ind;
 252         len = size * nb;
 253         if (remain < len)
 254                 len = remain - remain % size;
 255
 256         memcpy (ptr, ov_decode->buffer + ov_decode->ind, len);
 257         ov_decode->ind += len;
 258
 259         return len / size;
 260 }
 261
 262 static int ovcb_seek (void *datasource, ogg_int64_t offset, int whence)
 263 {
 264         ov_decode_t *ov_decode = (ov_decode_t*)datasource;
 265
 266         switch (whence)
 267         {
 268                 case SEEK_SET:
 269                         break;
 270                 case SEEK_CUR:
 271                         offset += ov_decode->ind;
 272                         break;
 273                 case SEEK_END:
 274                         offset += ov_decode->buffsize;
 275                         break;
 276                 default:
 277                         return -1;
 278         }
 279         if (offset < 0 || offset > ov_decode->buffsize)
 280                 return -1;
 281
 282         ov_decode->ind = offset;
 283         return 0;
 284 }
 285
 286 static int ovcb_close (void *ov_decode)
 287 {
 288         return 0;
 289 }
 290
 291 static long ovcb_tell (void *ov_decode)
 292 {
 293         return ((ov_decode_t*)ov_decode)->ind;
 294 }
 295
 296
 297 /*
 298 =================================================================
 299
 300   DLL load & unload
 301
 302 =================================================================
 303 */
 304
 305 /*
 306 ====================
 307 OGG_OpenLibrary
 308
 309 Try to load the VorbisFile DLL
 310 ====================
 311 */
 312 qboolean OGG_OpenLibrary (void)
 313 {
 314         const char* dllnames_vo [] =
 315         {
 316 #if defined(WIN32)
 317                 "libvorbis.dll",
 318                 "vorbis.dll",
 319 #elif defined(MACOSX)
 320                 "libvorbis.dylib",
 321 #else
 322                 "libvorbis.so.0",
 323                 "libvorbis.so",
 324 #endif
 325                 NULL
 326         };
 327         const char* dllnames_vf [] =
 328         {
 329 #if defined(WIN32)
 330                 "libvorbisfile.dll",
 331                 "vorbisfile.dll",
 332 #elif defined(MACOSX)
 333                 "libvorbisfile.dylib",
 334 #else
 335                 "libvorbisfile.so.3",
 336                 "libvorbisfile.so",
 337 #endif
 338                 NULL
 339         };
 340
 341         // Already loaded?
 342         if (vf_dll)
 343                 return true;
 344
 345 // COMMANDLINEOPTION: Sound: -novorbis disables ogg vorbis sound support
 346         if (COM_CheckParm("-novorbis"))
 347                 return false;
 348
 349         // Load the DLLs
 350         // We need to load both by hand because some OSes seem to not load
 351         // the vorbis DLL automatically when loading the VorbisFile DLL
 352         return Sys_LoadLibrary (dllnames_vo, &vo_dll, vorbisfuncs) && Sys_LoadLibrary (dllnames_vf, &vf_dll, vorbisfilefuncs);
 353 }
 354
 355
 356 /*
 357 ====================
 358 OGG_CloseLibrary
 359
 360 Unload the VorbisFile DLL
 361 ====================
 362 */
 363 void OGG_CloseLibrary (void)
 364 {
 365         Sys_UnloadLibrary (&vf_dll);
 366         Sys_UnloadLibrary (&vo_dll);
 367 }
 368
 369
 370 /*
 371 =================================================================
 372
 373         Ogg Vorbis decoding
 374
 375 =================================================================
 376 */
 377
 378 // Per-sfx data structure
 379 typedef struct
 380 {
 381         unsigned char   *file;
 382         size_t                  filesize;
 383         snd_format_t    format;
 384         unsigned int    total_length;
 385         char                    name[128];
 386 } ogg_stream_persfx_t;
 387
 388 // Per-channel data structure
 389 typedef struct
 390 {
 391         OggVorbis_File  vf;
 392         ov_decode_t             ov_decode;
 393         unsigned int    sb_offset;
 394         int                             bs;
 395         snd_buffer_t    sb;             // must be at the end due to its dynamically allocated size
 396 } ogg_stream_perchannel_t;
 397
 398
 399 static const ov_callbacks callbacks = {ovcb_read, ovcb_seek, ovcb_close, ovcb_tell};
 400
 401 /*
 402 ====================
 403 OGG_FetchSound
 404 ====================
 405 */
 406 static const snd_buffer_t* OGG_FetchSound (void *sfxfetcher, void **chfetcherpointer, unsigned int *start, unsigned int nbsampleframes)
 407 {
 408         ogg_stream_perchannel_t* per_ch = (ogg_stream_perchannel_t *)*chfetcherpointer;
 409         ogg_stream_persfx_t* per_sfx = (ogg_stream_persfx_t *)sfxfetcher;
 410         snd_buffer_t* sb;
 411         int newlength, done, ret;
 412         unsigned int real_start;
 413         unsigned int factor;
 414
 415         // If there's no fetcher structure attached to the channel yet
 416         if (per_ch == NULL)
 417         {
 418                 size_t buff_len, memsize;
 419                 snd_format_t sb_format;
 420
 421                 sb_format.speed = snd_renderbuffer->format.speed;
 422                 sb_format.width = per_sfx->format.width;
 423                 sb_format.channels = per_sfx->format.channels;
 424
 425                 buff_len = STREAM_BUFFER_SIZE(&sb_format);
 426                 memsize = sizeof (*per_ch) - sizeof (per_ch->sb.samples) + buff_len;
 427                 per_ch = (ogg_stream_perchannel_t *)Mem_Alloc (snd_mempool, memsize);
 428
 429                 // Open it with the VorbisFile API
 430                 per_ch->ov_decode.buffer = per_sfx->file;
 431                 per_ch->ov_decode.ind = 0;
 432                 per_ch->ov_decode.buffsize = per_sfx->filesize;
 433                 if (qov_open_callbacks (&per_ch->ov_decode, &per_ch->vf, NULL, 0, callbacks) < 0)
 434                 {
 435                         Con_Printf("error while reading Ogg Vorbis stream \"%s\"\n", per_sfx->name);
 436                         Mem_Free (per_ch);
 437                         return NULL;
 438                 }
 439                 per_ch->bs = 0;
 440
 441                 per_ch->sb_offset = 0;
 442                 per_ch->sb.format = sb_format;
 443                 per_ch->sb.nbframes = 0;
 444                 per_ch->sb.maxframes = buff_len / (per_ch->sb.format.channels * per_ch->sb.format.width);
 445
 446                 *chfetcherpointer = per_ch;
 447         }
 448
 449         real_start = *start;
 450
 451         sb = &per_ch->sb;
 452         factor = per_sfx->format.width * per_sfx->format.channels;
 453
 454         // If the stream buffer can't contain that much samples anyway
 455         if (nbsampleframes > sb->maxframes)
 456         {
 457                 Con_Printf ("OGG_FetchSound: stream buffer too small (%u sample frames required)\n", nbsampleframes);
 458                 return NULL;
 459         }
 460
 461         // If the data we need has already been decompressed in the sfxbuffer, just return it
 462         if (per_ch->sb_offset <= real_start && per_ch->sb_offset + sb->nbframes >= real_start + nbsampleframes)
 463         {
 464                 *start = per_ch->sb_offset;
 465                 return sb;
 466         }
 467
 468         newlength = (int)(per_ch->sb_offset + sb->nbframes) - real_start;
 469
 470         // If we need to skip some data before decompressing the rest, or if the stream has looped
 471         if (newlength < 0 || per_ch->sb_offset > real_start)
 472         {
 473                 unsigned int time_start;
 474                 ogg_int64_t ogg_start;
 475                 int err;
 476
 477                 if (real_start > (unsigned int)per_sfx->total_length)
 478                 {
 479                         Con_Printf ("OGG_FetchSound: asked for a start position after the end of the sfx! (%u > %u)\n",
 480                                                 real_start, per_sfx->total_length);
 481                         return NULL;
 482                 }
 483
 484                 // We work with 200ms (1/5 sec) steps to avoid rounding errors
 485                 time_start = real_start * 5 / snd_renderbuffer->format.speed;
 486                 ogg_start = time_start * (per_sfx->format.speed / 5);
 487                 err = qov_pcm_seek (&per_ch->vf, ogg_start);
 488                 if (err != 0)
 489                 {
 490                         Con_Printf ("OGG_FetchSound: qov_pcm_seek(..., %d) returned %d\n",
 491                                                 real_start, err);
 492                         return NULL;
 493                 }
 494                 sb->nbframes = 0;
 495
 496                 real_start = (unsigned int) ((float)ogg_start / per_sfx->format.speed * snd_renderbuffer->format.speed);
 497                 if (*start - real_start + nbsampleframes > sb->maxframes)
 498                 {
 499                         Con_Printf ("OGG_FetchSound: stream buffer too small after seek (%u sample frames required)\n",
 500                                                 *start - real_start + nbsampleframes);
 501                         per_ch->sb_offset = real_start;
 502                         return NULL;
 503                 }
 504         }
 505         // Else, move forward the samples we need to keep in the sound buffer
 506         else
 507         {
 508                 memmove (sb->samples, sb->samples + (real_start - per_ch->sb_offset) * factor, newlength * factor);
 509                 sb->nbframes = newlength;
 510         }
 511
 512         per_ch->sb_offset = real_start;
 513
 514         // We add more than one frame of sound to the buffer:
 515         // 1- to ensure we won't lose many samples during the resampling process
 516         // 2- to reduce calls to OGG_FetchSound to regulate workload
 517         newlength = (int)(per_sfx->format.speed*STREAM_BUFFER_FILL);
 518         if (newlength + sb->nbframes > sb->maxframes)
 519         {
 520                 Con_Printf ("OGG_FetchSound: stream buffer overflow (%u sample frames / %u)\n",
 521                                         sb->format.speed + sb->nbframes, sb->maxframes);
 522                 return NULL;
 523         }
 524         newlength *= factor; // convert from sample frames to bytes
 525         if(newlength > (int)sizeof(resampling_buffer))
 526                 newlength = sizeof(resampling_buffer);
 527
 528         // Decompress in the resampling_buffer
 529         done = 0;
 530         while ((ret = qov_read (&per_ch->vf, (char *)&resampling_buffer[done], (int)(newlength - done), mem_bigendian, 2, 1, &per_ch->bs)) > 0)
 531                 done += ret;
 532
 533         Snd_AppendToSndBuffer (sb, resampling_buffer, (size_t)done / (size_t)factor, &per_sfx->format);
 534
 535         *start = per_ch->sb_offset;
 536         return sb;
 537 }
 538
 539
 540 /*
 541 ====================
 542 OGG_FetchEnd
 543 ====================
 544 */
 545 static void OGG_FetchEnd (void *chfetcherdata)
 546 {
 547         ogg_stream_perchannel_t* per_ch = (ogg_stream_perchannel_t *)chfetcherdata;
 548
 549         if (per_ch != NULL)
 550         {
 551                 // Free the ogg vorbis decoder
 552                 qov_clear (&per_ch->vf);
 553
 554                 Mem_Free (per_ch);
 555         }
 556 }
 557
 558
 559 /*
 560 ====================
 561 OGG_FreeSfx
 562 ====================
 563 */
 564 static void OGG_FreeSfx (void *sfxfetcherdata)
 565 {
 566         ogg_stream_persfx_t* per_sfx = (ogg_stream_persfx_t *)sfxfetcherdata;
 567
 568         // Free the Ogg Vorbis file
 569         Mem_Free(per_sfx->file);
 570
 571         // Free the stream structure
 572         Mem_Free(per_sfx);
 573 }
 574
 575
 576 /*
 577 ====================
 578 OGG_GetFormat
 579 ====================
 580 */
 581 static const snd_format_t* OGG_GetFormat (sfx_t* sfx)
 582 {
 583         ogg_stream_persfx_t* per_sfx = (ogg_stream_persfx_t *)sfx->fetcher_data;
 584         return &per_sfx->format;
 585 }
 586
 587 static const snd_fetcher_t ogg_fetcher = { OGG_FetchSound, OGG_FetchEnd, OGG_FreeSfx, OGG_GetFormat };
 588
 589 static void OGG_DecodeTags(vorbis_comment *vc, unsigned int *start, unsigned int *length, double samplesfactor, unsigned int numsamples, double *peak, double *gaindb)
 590 {
 591         const char *startcomment = NULL, *lengthcomment = NULL, *endcomment = NULL, *thiscomment = NULL;
 592
 593         *start = numsamples;
 594         *length = numsamples;
 595         *peak = 0.0;
 596         *gaindb = 0.0;
 597
 598         if(!vc)
 599                 return;
 600
 601         thiscomment = qvorbis_comment_query(vc, "REPLAYGAIN_TRACK_PEAK", 0);
 602         if(thiscomment)
 603                 *peak = atof(thiscomment);
 604         thiscomment = qvorbis_comment_query(vc, "REPLAYGAIN_TRACK_GAIN", 0);
 605         if(thiscomment)
 606                 *gaindb = atof(thiscomment);
 607
 608         startcomment = qvorbis_comment_query(vc, "LOOP_START", 0); // DarkPlaces, and some Japanese app
 609         if(startcomment)
 610         {
 611                 endcomment = qvorbis_comment_query(vc, "LOOP_END", 0);
 612                 if(!endcomment)
 613                         lengthcomment = qvorbis_comment_query(vc, "LOOP_LENGTH", 0);
 614         }
 615         else
 616         {
 617                 startcomment = qvorbis_comment_query(vc, "LOOPSTART", 0); // RPG Maker VX
 618                 if(startcomment)
 619                 {
 620                         lengthcomment = qvorbis_comment_query(vc, "LOOPLENGTH", 0);
 621                         if(!lengthcomment)
 622                                 endcomment = qvorbis_comment_query(vc, "LOOPEND", 0);
 623                 }
 624                 else
 625                 {
 626                         startcomment = qvorbis_comment_query(vc, "LOOPPOINT", 0); // Sonic Robo Blast 2
 627                 }
 628         }
 629
 630         if(startcomment)
 631         {
 632                 *start = (unsigned int) bound(0, atof(startcomment) * samplesfactor, numsamples);
 633                 if(endcomment)
 634                         *length = (unsigned int) bound(0, atof(endcomment) * samplesfactor, numsamples);
 635                 else if(lengthcomment)
 636                         *length = (unsigned int) bound(0, *start + atof(lengthcomment) * samplesfactor, numsamples);
 637         }
 638 }
 639
 640 /*
 641 ====================
 642 OGG_LoadVorbisFile
 643
 644 Load an Ogg Vorbis file into memory
 645 ====================
 646 */
 647 qboolean OGG_LoadVorbisFile (const char *filename, sfx_t *sfx)
 648 {
 649         unsigned char *data;
 650         fs_offset_t filesize;
 651         ov_decode_t ov_decode;
 652         OggVorbis_File vf;
 653         vorbis_info *vi;
 654         vorbis_comment *vc;
 655         ogg_int64_t len, buff_len;
 656         double peak, gaindb;
 657
 658         if (!vf_dll)
 659                 return false;
 660
 661         // Already loaded?
 662         if (sfx->fetcher != NULL)
 663                 return true;
 664
 665         // Load the file
 666         data = FS_LoadFile (filename, snd_mempool, false, &filesize);
 667         if (data == NULL)
 668                 return false;
 669
 670         if (developer_loading.integer >= 2)
 671                 Con_Printf ("Loading Ogg Vorbis file \"%s\"\n", filename);
 672
 673         // Open it with the VorbisFile API
 674         ov_decode.buffer = data;
 675         ov_decode.ind = 0;
 676         ov_decode.buffsize = filesize;
 677         if (qov_open_callbacks (&ov_decode, &vf, NULL, 0, callbacks) < 0)
 678         {
 679                 Con_Printf ("error while opening Ogg Vorbis file \"%s\"\n", filename);
 680                 Mem_Free(data);
 681                 return false;
 682         }
 683
 684         // Get the stream information
 685         vi = qov_info (&vf, -1);
 686         if (vi->channels < 1 || vi->channels > 2)
 687         {
 688                 Con_Printf("%s has an unsupported number of channels (%i)\n",
 689                                         sfx->name, vi->channels);
 690                 qov_clear (&vf);
 691                 Mem_Free(data);
 692                 return false;
 693         }
 694
 695         len = qov_pcm_total (&vf, -1) * vi->channels * 2;  // 16 bits => "* 2"
 696
 697         // Decide if we go for a stream or a simple PCM cache
 698         buff_len = (int)ceil (STREAM_BUFFER_DURATION * snd_renderbuffer->format.speed) * 2 * vi->channels;
 699         if (snd_streaming.integer && (len > (ogg_int64_t)filesize + 3 * buff_len || snd_streaming.integer >= 2))
 700         {
 701                 ogg_stream_persfx_t* per_sfx;
 702
 703                 if (developer_loading.integer >= 2)
 704                         Con_Printf ("Ogg sound file \"%s\" will be streamed\n", filename);
 705                 per_sfx = (ogg_stream_persfx_t *)Mem_Alloc (snd_mempool, sizeof (*per_sfx));
 706                 strlcpy(per_sfx->name, sfx->name, sizeof(per_sfx->name));
 707                 sfx->memsize += sizeof (*per_sfx);
 708                 per_sfx->file = data;
 709                 per_sfx->filesize = filesize;
 710                 sfx->memsize += filesize;
 711
 712                 per_sfx->format.speed = vi->rate;
 713                 per_sfx->format.width = 2;  // We always work with 16 bits samples
 714                 per_sfx->format.channels = vi->channels;
 715
 716                 sfx->fetcher_data = per_sfx;
 717                 sfx->fetcher = &ogg_fetcher;
 718                 sfx->flags |= SFXFLAG_STREAMED;
 719                 sfx->total_length = (int)((size_t)len / (per_sfx->format.channels * 2) * ((double)snd_renderbuffer->format.speed / per_sfx->format.speed));
 720                 vc = qov_comment(&vf, -1);
 721                 OGG_DecodeTags(vc, &sfx->loopstart, &sfx->total_length, (double)snd_renderbuffer->format.speed / (double)per_sfx->format.speed, sfx->total_length, &peak, &gaindb);
 722                 per_sfx->total_length = sfx->total_length;
 723                 qov_clear (&vf);
 724         }
 725         else
 726         {
 727                 char *buff;
 728                 ogg_int64_t done;
 729                 int bs;
 730                 long ret;
 731                 snd_buffer_t *sb;
 732                 snd_format_t ogg_format;
 733
 734                 if (developer_loading.integer >= 2)
 735                         Con_Printf ("Ogg sound file \"%s\" will be cached\n", filename);
 736
 737                 // Decode it
 738                 buff = (char *)Mem_Alloc (snd_mempool, (int)len);
 739                 done = 0;
 740                 bs = 0;
 741                 while ((ret = qov_read (&vf, &buff[done], (int)(len - done), mem_bigendian, 2, 1, &bs)) > 0)
 742                         done += ret;
 743
 744                 // Build the sound buffer
 745                 ogg_format.speed = vi->rate;
 746                 ogg_format.channels = vi->channels;
 747                 ogg_format.width = 2;  // We always work with 16 bits samples
 748                 sb = Snd_CreateSndBuffer ((unsigned char *)buff, (size_t)done / (vi->channels * 2), &ogg_format, snd_renderbuffer->format.speed);
 749                 if (sb == NULL)
 750                 {
 751                         qov_clear (&vf);
 752                         Mem_Free (data);
 753                         Mem_Free (buff);
 754                         return false;
 755                 }
 756
 757                 sfx->fetcher = &wav_fetcher;
 758                 sfx->fetcher_data = sb;
 759
 760                 sfx->total_length = sb->nbframes;
 761                 sfx->memsize += sb->maxframes * sb->format.channels * sb->format.width + sizeof (*sb) - sizeof (sb->samples);
 762
 763                 sfx->flags &= ~SFXFLAG_STREAMED;
 764                 vc = qov_comment(&vf, -1);
 765                 OGG_DecodeTags(vc, &sfx->loopstart, &sfx->total_length, (double)snd_renderbuffer->format.speed / (double)sb->format.speed, sfx->total_length, &peak, &gaindb);
 766                 sb->nbframes = sfx->total_length;
 767                 qov_clear (&vf);
 768                 Mem_Free (data);
 769                 Mem_Free (buff);
 770         }
 771
 772         if(peak)
 773         {
 774                 sfx->volume_mult = min(1.0f / peak, exp(gaindb * 0.05f * log(10.0f)));
 775                 sfx->volume_peak = peak;
 776                 if (developer_loading.integer >= 2)
 777                         Con_Printf ("Ogg sound file \"%s\" uses ReplayGain (gain %f, peak %f)\n", filename, sfx->volume_mult, sfx->volume_peak);
 778         }
 779
 780         return true;
 781 }