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
  29
  30 /*
  31 =================================================================
  32
  33   Minimal set of definitions from the Ogg Vorbis lib
  34   (C) COPYRIGHT 1994-2001 by the XIPHOPHORUS Company
  35   http://www.xiph.org/
  36
  37   WARNING: for a matter of simplicity, several pointer types are
  38   casted to "void*", and most enumerated values are not included
  39
  40 =================================================================
  41 */
  42
  43 #ifdef _MSC_VER
  44 typedef __int64 ogg_int64_t;
  45 #else
  46 typedef long long ogg_int64_t;
  47 #endif
  48
  49 typedef struct
  50 {
  51         size_t  (*read_func)    (void *ptr, size_t size, size_t nmemb, void *datasource);
  52         int             (*seek_func)    (void *datasource, ogg_int64_t offset, int whence);
  53         int             (*close_func)   (void *datasource);
  54         long    (*tell_func)    (void *datasource);
  55 } ov_callbacks;
  56
  57 typedef struct
  58 {
  59         unsigned char   *data;
  60         int                             storage;
  61         int                             fill;
  62         int                             returned;
  63         int                             unsynced;
  64         int                             headerbytes;
  65         int                             bodybytes;
  66 } ogg_sync_state;
  67
  68 typedef struct
  69 {
  70         int             version;
  71         int             channels;
  72         long    rate;
  73         long    bitrate_upper;
  74         long    bitrate_nominal;
  75         long    bitrate_lower;
  76         long    bitrate_window;
  77         void    *codec_setup;
  78 } vorbis_info;
  79
  80 typedef struct
  81 {
  82         unsigned char   *body_data;
  83         long                    body_storage;
  84         long                    body_fill;
  85         long                    body_returned;
  86         int                             *lacing_vals;
  87         ogg_int64_t             *granule_vals;
  88         long                    lacing_storage;
  89         long                    lacing_fill;
  90         long                    lacing_packet;
  91         long                    lacing_returned;
  92         unsigned char   header[282];
  93         int                             header_fill;
  94         int                             e_o_s;
  95         int                             b_o_s;
  96         long                    serialno;
  97         long                    pageno;
  98         ogg_int64_t             packetno;
  99         ogg_int64_t             granulepos;
 100 } ogg_stream_state;
 101
 102 typedef struct
 103 {
 104         int                     analysisp;
 105         vorbis_info     *vi;
 106         float           **pcm;
 107         float           **pcmret;
 108         int                     pcm_storage;
 109         int                     pcm_current;
 110         int                     pcm_returned;
 111         int                     preextrapolate;
 112         int                     eofflag;
 113         long            lW;
 114         long            W;
 115         long            nW;
 116         long            centerW;
 117         ogg_int64_t     granulepos;
 118         ogg_int64_t     sequence;
 119         ogg_int64_t     glue_bits;
 120         ogg_int64_t     time_bits;
 121         ogg_int64_t     floor_bits;
 122         ogg_int64_t     res_bits;
 123         void            *backend_state;
 124 } vorbis_dsp_state;
 125
 126 typedef struct
 127 {
 128         long                    endbyte;
 129         int                             endbit;
 130         unsigned char   *buffer;
 131         unsigned char   *ptr;
 132         long                    storage;
 133 } oggpack_buffer;
 134
 135 typedef struct
 136 {
 137         float                           **pcm;
 138         oggpack_buffer          opb;
 139         long                            lW;
 140         long                            W;
 141         long                            nW;
 142         int                                     pcmend;
 143         int                                     mode;
 144         int                                     eofflag;
 145         ogg_int64_t                     granulepos;
 146         ogg_int64_t                     sequence;
 147         vorbis_dsp_state        *vd;
 148         void                            *localstore;
 149         long                            localtop;
 150         long                            localalloc;
 151         long                            totaluse;
 152         void                            *reap;  // VOIDED POINTER
 153         long                            glue_bits;
 154         long                            time_bits;
 155         long                            floor_bits;
 156         long                            res_bits;
 157         void                            *internal;
 158 } vorbis_block;
 159
 160 typedef struct
 161 {
 162         char **user_comments;
 163         int   *comment_lengths;
 164         int    comments;
 165         char  *vendor;
 166 } vorbis_comment;
 167
 168 typedef struct
 169 {
 170         void                            *datasource;
 171         int                                     seekable;
 172         ogg_int64_t                     offset;
 173         ogg_int64_t                     end;
 174         ogg_sync_state          oy;
 175         int                                     links;
 176         ogg_int64_t                     *offsets;
 177         ogg_int64_t                     *dataoffsets;
 178         long                            *serialnos;
 179         ogg_int64_t                     *pcmlengths;
 180         vorbis_info                     *vi;
 181         vorbis_comment          *vc;
 182         ogg_int64_t                     pcm_offset;
 183         int                                     ready_state;
 184         long                            current_serialno;
 185         int                                     current_link;
 186         double                          bittrack;
 187         double                          samptrack;
 188         ogg_stream_state        os;
 189         vorbis_dsp_state        vd;
 190         vorbis_block            vb;
 191         ov_callbacks            callbacks;
 192 } OggVorbis_File;
 193
 194
 195 /*
 196 =================================================================
 197
 198   DarkPlaces definitions
 199
 200 =================================================================
 201 */
 202
 203 // Functions exported from the vorbisfile library
 204 static int (*qov_clear) (OggVorbis_File *vf);
 205 static vorbis_info* (*qov_info) (OggVorbis_File *vf,int link);
 206 static vorbis_comment* (*qov_comment) (OggVorbis_File *vf,int link);
 207 static char * (*qvorbis_comment_query) (vorbis_comment *vc, char *tag, int count);
 208 static int (*qov_open_callbacks) (void *datasource, OggVorbis_File *vf,
 209                                                                   char *initial, long ibytes,
 210                                                                   ov_callbacks callbacks);
 211 static int (*qov_pcm_seek) (OggVorbis_File *vf,ogg_int64_t pos);
 212 static ogg_int64_t (*qov_pcm_total) (OggVorbis_File *vf,int i);
 213 static long (*qov_read) (OggVorbis_File *vf,char *buffer,int length,
 214                                                  int bigendianp,int word,int sgned,int *bitstream);
 215
 216 static dllfunction_t vorbisfilefuncs[] =
 217 {
 218         {"ov_clear",                            (void **) &qov_clear},
 219         {"ov_info",                                     (void **) &qov_info},
 220         {"ov_comment",                          (void **) &qov_comment},
 221         {"ov_open_callbacks",           (void **) &qov_open_callbacks},
 222         {"ov_pcm_seek",                         (void **) &qov_pcm_seek},
 223         {"ov_pcm_total",                        (void **) &qov_pcm_total},
 224         {"ov_read",                                     (void **) &qov_read},
 225         {NULL, NULL}
 226 };
 227
 228 static dllfunction_t vorbisfuncs[] =
 229 {
 230         {"vorbis_comment_query",        (void **) &qvorbis_comment_query},
 231         {NULL, NULL}
 232 };
 233
 234 // Handles for the Vorbis and Vorbisfile DLLs
 235 static dllhandle_t vo_dll = NULL;
 236 static dllhandle_t vf_dll = NULL;
 237
 238 typedef struct
 239 {
 240         unsigned char *buffer;
 241         ogg_int64_t ind, buffsize;
 242 } ov_decode_t;
 243
 244
 245 static size_t ovcb_read (void *ptr, size_t size, size_t nb, void *datasource)
 246 {
 247         ov_decode_t *ov_decode = (ov_decode_t*)datasource;
 248         size_t remain, len;
 249
 250         remain = ov_decode->buffsize - ov_decode->ind;
 251         len = size * nb;
 252         if (remain < len)
 253                 len = remain - remain % size;
 254
 255         memcpy (ptr, ov_decode->buffer + ov_decode->ind, len);
 256         ov_decode->ind += len;
 257
 258         return len / size;
 259 }
 260
 261 static int ovcb_seek (void *datasource, ogg_int64_t offset, int whence)
 262 {
 263         ov_decode_t *ov_decode = (ov_decode_t*)datasource;
 264
 265         switch (whence)
 266         {
 267                 case SEEK_SET:
 268                         break;
 269                 case SEEK_CUR:
 270                         offset += ov_decode->ind;
 271                         break;
 272                 case SEEK_END:
 273                         offset += ov_decode->buffsize;
 274                         break;
 275                 default:
 276                         return -1;
 277         }
 278         if (offset < 0 || offset > ov_decode->buffsize)
 279                 return -1;
 280
 281         ov_decode->ind = offset;
 282         return 0;
 283 }
 284
 285 static int ovcb_close (void *ov_decode)
 286 {
 287         return 0;
 288 }
 289
 290 static long ovcb_tell (void *ov_decode)
 291 {
 292         return ((ov_decode_t*)ov_decode)->ind;
 293 }
 294
 295
 296 /*
 297 =================================================================
 298
 299   DLL load & unload
 300
 301 =================================================================
 302 */
 303
 304 /*
 305 ====================
 306 OGG_OpenLibrary
 307
 308 Try to load the VorbisFile DLL
 309 ====================
 310 */
 311 qboolean OGG_OpenLibrary (void)
 312 {
 313         const char* dllnames_vo [] =
 314         {
 315 #if defined(WIN64)
 316                 "libvorbis64.dll",
 317 #elif defined(WIN32)
 318                 "libvorbis.dll",
 319                 "vorbis.dll",
 320 #elif defined(MACOSX)
 321                 "libvorbis.dylib",
 322 #else
 323                 "libvorbis.so.0",
 324                 "libvorbis.so",
 325 #endif
 326                 NULL
 327         };
 328         const char* dllnames_vf [] =
 329         {
 330 #if defined(WIN64)
 331                 "libvorbisfile64.dll",
 332 #elif defined(WIN32)
 333                 "libvorbisfile.dll",
 334                 "vorbisfile.dll",
 335 #elif defined(MACOSX)
 336                 "libvorbisfile.dylib",
 337 #else
 338                 "libvorbisfile.so.3",
 339                 "libvorbisfile.so",
 340 #endif
 341                 NULL
 342         };
 343
 344         // Already loaded?
 345         if (vf_dll)
 346                 return true;
 347
 348 // COMMANDLINEOPTION: Sound: -novorbis disables ogg vorbis sound support
 349         if (COM_CheckParm("-novorbis"))
 350                 return false;
 351
 352         // Load the DLLs
 353         // We need to load both by hand because some OSes seem to not load
 354         // the vorbis DLL automatically when loading the VorbisFile DLL
 355         return Sys_LoadLibrary (dllnames_vo, &vo_dll, vorbisfuncs) && Sys_LoadLibrary (dllnames_vf, &vf_dll, vorbisfilefuncs);
 356 }
 357
 358
 359 /*
 360 ====================
 361 OGG_CloseLibrary
 362
 363 Unload the VorbisFile DLL
 364 ====================
 365 */
 366 void OGG_CloseLibrary (void)
 367 {
 368         Sys_UnloadLibrary (&vf_dll);
 369         Sys_UnloadLibrary (&vo_dll);
 370 }
 371
 372
 373 /*
 374 =================================================================
 375
 376         Ogg Vorbis decoding
 377
 378 =================================================================
 379 */
 380
 381 // Per-sfx data structure
 382 typedef struct
 383 {
 384         unsigned char   *file;
 385         size_t                  filesize;
 386         snd_format_t    format;
 387         unsigned int    total_length;
 388         char                    name[128];
 389 } ogg_stream_persfx_t;
 390
 391 // Per-channel data structure
 392 typedef struct
 393 {
 394         OggVorbis_File  vf;
 395         ov_decode_t             ov_decode;
 396         unsigned int    sb_offset;
 397         int                             bs;
 398         snd_buffer_t    sb;             // must be at the end due to its dynamically allocated size
 399 } ogg_stream_perchannel_t;
 400
 401
 402 static const ov_callbacks callbacks = {ovcb_read, ovcb_seek, ovcb_close, ovcb_tell};
 403
 404 /*
 405 ====================
 406 OGG_FetchSound
 407 ====================
 408 */
 409 static const snd_buffer_t* OGG_FetchSound (void *sfxfetcher, void **chfetcherpointer, unsigned int *start, unsigned int nbsampleframes)
 410 {
 411         ogg_stream_perchannel_t* per_ch = (ogg_stream_perchannel_t *)*chfetcherpointer;
 412         ogg_stream_persfx_t* per_sfx = (ogg_stream_persfx_t *)sfxfetcher;
 413         snd_buffer_t* sb;
 414         int newlength, done, ret, bigendian;
 415         unsigned int real_start;
 416         unsigned int factor;
 417
 418         // If there's no fetcher structure attached to the channel yet
 419         if (per_ch == NULL)
 420         {
 421                 size_t buff_len, memsize;
 422                 snd_format_t sb_format;
 423
 424                 sb_format.speed = snd_renderbuffer->format.speed;
 425                 sb_format.width = per_sfx->format.width;
 426                 sb_format.channels = per_sfx->format.channels;
 427
 428                 buff_len = STREAM_BUFFER_SIZE(&sb_format);
 429                 memsize = sizeof (*per_ch) - sizeof (per_ch->sb.samples) + buff_len;
 430                 per_ch = (ogg_stream_perchannel_t *)Mem_Alloc (snd_mempool, memsize);
 431
 432                 // Open it with the VorbisFile API
 433                 per_ch->ov_decode.buffer = per_sfx->file;
 434                 per_ch->ov_decode.ind = 0;
 435                 per_ch->ov_decode.buffsize = per_sfx->filesize;
 436                 if (qov_open_callbacks (&per_ch->ov_decode, &per_ch->vf, NULL, 0, callbacks) < 0)
 437                 {
 438                         Con_Printf("error while reading Ogg Vorbis stream \"%s\"\n", per_sfx->name);
 439                         Mem_Free (per_ch);
 440                         return NULL;
 441                 }
 442                 per_ch->bs = 0;
 443
 444                 per_ch->sb_offset = 0;
 445                 per_ch->sb.format = sb_format;
 446                 per_ch->sb.nbframes = 0;
 447                 per_ch->sb.maxframes = buff_len / (per_ch->sb.format.channels * per_ch->sb.format.width);
 448
 449                 *chfetcherpointer = per_ch;
 450         }
 451
 452         real_start = *start;
 453
 454         sb = &per_ch->sb;
 455         factor = per_sfx->format.width * per_sfx->format.channels;
 456
 457         // If the stream buffer can't contain that much samples anyway
 458         if (nbsampleframes > sb->maxframes)
 459         {
 460                 Con_Printf ("OGG_FetchSound: stream buffer too small (%u sample frames required)\n", nbsampleframes);
 461                 return NULL;
 462         }
 463
 464         // If the data we need has already been decompressed in the sfxbuffer, just return it
 465         if (per_ch->sb_offset <= real_start && per_ch->sb_offset + sb->nbframes >= real_start + nbsampleframes)
 466         {
 467                 *start = per_ch->sb_offset;
 468                 return sb;
 469         }
 470
 471         newlength = (int)(per_ch->sb_offset + sb->nbframes) - real_start;
 472
 473         // If we need to skip some data before decompressing the rest, or if the stream has looped
 474         if (newlength < 0 || per_ch->sb_offset > real_start)
 475         {
 476                 unsigned int time_start;
 477                 ogg_int64_t ogg_start;
 478                 int err;
 479
 480                 if (real_start > (unsigned int)per_sfx->total_length)
 481                 {
 482                         Con_Printf ("OGG_FetchSound: asked for a start position after the end of the sfx! (%u > %u)\n",
 483                                                 real_start, per_sfx->total_length);
 484                         return NULL;
 485                 }
 486
 487                 // We work with 200ms (1/5 sec) steps to avoid rounding errors
 488                 time_start = real_start * 5 / snd_renderbuffer->format.speed;
 489                 ogg_start = time_start * (per_sfx->format.speed / 5);
 490                 err = qov_pcm_seek (&per_ch->vf, ogg_start);
 491                 if (err != 0)
 492                 {
 493                         Con_Printf ("OGG_FetchSound: qov_pcm_seek(..., %d) returned %d\n",
 494                                                 real_start, err);
 495                         return NULL;
 496                 }
 497                 sb->nbframes = 0;
 498
 499                 real_start = (unsigned int) ((float)ogg_start / per_sfx->format.speed * snd_renderbuffer->format.speed);
 500                 if (*start - real_start + nbsampleframes > sb->maxframes)
 501                 {
 502                         Con_Printf ("OGG_FetchSound: stream buffer too small after seek (%u sample frames required)\n",
 503                                                 *start - real_start + nbsampleframes);
 504                         per_ch->sb_offset = real_start;
 505                         return NULL;
 506                 }
 507         }
 508         // Else, move forward the samples we need to keep in the sound buffer
 509         else
 510         {
 511                 memmove (sb->samples, sb->samples + (real_start - per_ch->sb_offset) * factor, newlength * factor);
 512                 sb->nbframes = newlength;
 513         }
 514
 515         per_ch->sb_offset = real_start;
 516
 517         // We add more than one frame of sound to the buffer:
 518         // 1- to ensure we won't lose many samples during the resampling process
 519         // 2- to reduce calls to OGG_FetchSound to regulate workload
 520         newlength = (int)(per_sfx->format.speed*STREAM_BUFFER_FILL);
 521         if (newlength + sb->nbframes > sb->maxframes)
 522         {
 523                 Con_Printf ("OGG_FetchSound: stream buffer overflow (%u sample frames / %u)\n",
 524                                         sb->format.speed + sb->nbframes, sb->maxframes);
 525                 return NULL;
 526         }
 527         newlength *= factor; // convert from sample frames to bytes
 528         if(newlength > (int)sizeof(resampling_buffer))
 529                 newlength = sizeof(resampling_buffer);
 530
 531         // Decompress in the resampling_buffer
 532 #if BYTE_ORDER == BIG_ENDIAN
 533         bigendian = 1;
 534 #else
 535         bigendian = 0;
 536 #endif
 537         done = 0;
 538         while ((ret = qov_read (&per_ch->vf, (char *)&resampling_buffer[done], (int)(newlength - done), bigendian, 2, 1, &per_ch->bs)) > 0)
 539                 done += ret;
 540
 541         Snd_AppendToSndBuffer (sb, resampling_buffer, (size_t)done / (size_t)factor, &per_sfx->format);
 542
 543         *start = per_ch->sb_offset;
 544         return sb;
 545 }
 546
 547
 548 /*
 549 ====================
 550 OGG_FetchEnd
 551 ====================
 552 */
 553 static void OGG_FetchEnd (void *chfetcherdata)
 554 {
 555         ogg_stream_perchannel_t* per_ch = (ogg_stream_perchannel_t *)chfetcherdata;
 556
 557         if (per_ch != NULL)
 558         {
 559                 // Free the ogg vorbis decoder
 560                 qov_clear (&per_ch->vf);
 561
 562                 Mem_Free (per_ch);
 563         }
 564 }
 565
 566
 567 /*
 568 ====================
 569 OGG_FreeSfx
 570 ====================
 571 */
 572 static void OGG_FreeSfx (void *sfxfetcherdata)
 573 {
 574         ogg_stream_persfx_t* per_sfx = (ogg_stream_persfx_t *)sfxfetcherdata;
 575
 576         // Free the Ogg Vorbis file
 577         Mem_Free(per_sfx->file);
 578
 579         // Free the stream structure
 580         Mem_Free(per_sfx);
 581 }
 582
 583
 584 /*
 585 ====================
 586 OGG_GetFormat
 587 ====================
 588 */
 589 static const snd_format_t* OGG_GetFormat (sfx_t* sfx)
 590 {
 591         ogg_stream_persfx_t* per_sfx = (ogg_stream_persfx_t *)sfx->fetcher_data;
 592         return &per_sfx->format;
 593 }
 594
 595 static const snd_fetcher_t ogg_fetcher = { OGG_FetchSound, OGG_FetchEnd, OGG_FreeSfx, OGG_GetFormat };
 596
 597 static void OGG_DecodeTags(vorbis_comment *vc, unsigned int *start, unsigned int *length, double samplesfactor, unsigned int numsamples, double *peak, double *gaindb)
 598 {
 599         const char *startcomment = NULL, *lengthcomment = NULL, *endcomment = NULL, *thiscomment = NULL;
 600
 601         *start = numsamples;
 602         *length = numsamples;
 603         *peak = 0.0;
 604         *gaindb = 0.0;
 605
 606         if(!vc)
 607                 return;
 608
 609         thiscomment = qvorbis_comment_query(vc, "REPLAYGAIN_TRACK_PEAK", 0);
 610         if(thiscomment)
 611                 *peak = atof(thiscomment);
 612         thiscomment = qvorbis_comment_query(vc, "REPLAYGAIN_TRACK_GAIN", 0);
 613         if(thiscomment)
 614                 *gaindb = atof(thiscomment);
 615
 616         startcomment = qvorbis_comment_query(vc, "LOOP_START", 0); // DarkPlaces, and some Japanese app
 617         if(startcomment)
 618         {
 619                 endcomment = qvorbis_comment_query(vc, "LOOP_END", 0);
 620                 if(!endcomment)
 621                         lengthcomment = qvorbis_comment_query(vc, "LOOP_LENGTH", 0);
 622         }
 623         else
 624         {
 625                 startcomment = qvorbis_comment_query(vc, "LOOPSTART", 0); // RPG Maker VX
 626                 if(startcomment)
 627                 {
 628                         lengthcomment = qvorbis_comment_query(vc, "LOOPLENGTH", 0);
 629                         if(!lengthcomment)
 630                                 endcomment = qvorbis_comment_query(vc, "LOOPEND", 0);
 631                 }
 632                 else
 633                 {
 634                         startcomment = qvorbis_comment_query(vc, "LOOPPOINT", 0); // Sonic Robo Blast 2
 635                 }
 636         }
 637
 638         if(startcomment)
 639         {
 640                 *start = (unsigned int) bound(0, atof(startcomment) * samplesfactor, numsamples);
 641                 if(endcomment)
 642                         *length = (unsigned int) bound(0, atof(endcomment) * samplesfactor, numsamples);
 643                 else if(lengthcomment)
 644                         *length = (unsigned int) bound(0, *start + atof(lengthcomment) * samplesfactor, numsamples);
 645         }
 646 }
 647
 648 /*
 649 ====================
 650 OGG_LoadVorbisFile
 651
 652 Load an Ogg Vorbis file into memory
 653 ====================
 654 */
 655 qboolean OGG_LoadVorbisFile (const char *filename, sfx_t *sfx)
 656 {
 657         unsigned char *data;
 658         fs_offset_t filesize;
 659         ov_decode_t ov_decode;
 660         OggVorbis_File vf;
 661         ogg_stream_persfx_t* per_sfx;
 662         vorbis_info *vi;
 663         vorbis_comment *vc;
 664         ogg_int64_t len;
 665         double peak, gaindb;
 666
 667         if (!vf_dll)
 668                 return false;
 669
 670         // Already loaded?
 671         if (sfx->fetcher != NULL)
 672                 return true;
 673
 674         // Load the file
 675         data = FS_LoadFile (filename, snd_mempool, false, &filesize);
 676         if (data == NULL)
 677                 return false;
 678
 679         if (developer_loading.integer >= 2)
 680                 Con_Printf ("Loading Ogg Vorbis file \"%s\"\n", filename);
 681
 682         // Open it with the VorbisFile API
 683         ov_decode.buffer = data;
 684         ov_decode.ind = 0;
 685         ov_decode.buffsize = filesize;
 686         if (qov_open_callbacks (&ov_decode, &vf, NULL, 0, callbacks) < 0)
 687         {
 688                 Con_Printf ("error while opening Ogg Vorbis file \"%s\"\n", filename);
 689                 Mem_Free(data);
 690                 return false;
 691         }
 692
 693         // Get the stream information
 694         vi = qov_info (&vf, -1);
 695         if (vi->channels < 1 || vi->channels > 2)
 696         {
 697                 Con_Printf("%s has an unsupported number of channels (%i)\n",
 698                                         sfx->name, vi->channels);
 699                 qov_clear (&vf);
 700                 Mem_Free(data);
 701                 return false;
 702         }
 703
 704         len = qov_pcm_total (&vf, -1) * vi->channels * 2;  // 16 bits => "* 2"
 705
 706         if (developer_loading.integer >= 2)
 707                 Con_Printf ("Ogg sound file \"%s\" will be streamed\n", filename);
 708         per_sfx = (ogg_stream_persfx_t *)Mem_Alloc (snd_mempool, sizeof (*per_sfx));
 709         strlcpy(per_sfx->name, sfx->name, sizeof(per_sfx->name));
 710         sfx->memsize += sizeof (*per_sfx);
 711         per_sfx->file = data;
 712         per_sfx->filesize = filesize;
 713         sfx->memsize += filesize;
 714
 715         per_sfx->format.speed = vi->rate;
 716         per_sfx->format.width = 2;  // We always work with 16 bits samples
 717         per_sfx->format.channels = vi->channels;
 718
 719         sfx->fetcher_data = per_sfx;
 720         sfx->fetcher = &ogg_fetcher;
 721         sfx->flags |= SFXFLAG_STREAMED;
 722         sfx->total_length = (int)((size_t)len / (per_sfx->format.channels * 2) * ((double)snd_renderbuffer->format.speed / per_sfx->format.speed));
 723         vc = qov_comment(&vf, -1);
 724         OGG_DecodeTags(vc, &sfx->loopstart, &sfx->total_length, (double)snd_renderbuffer->format.speed / (double)per_sfx->format.speed, sfx->total_length, &peak, &gaindb);
 725         per_sfx->total_length = sfx->total_length;
 726         qov_clear (&vf);
 727
 728         if(peak)
 729         {
 730                 sfx->volume_mult = min(1.0f / peak, exp(gaindb * 0.05f * log(10.0f)));
 731                 sfx->volume_peak = peak;
 732                 if (developer_loading.integer >= 2)
 733                         Con_Printf ("Ogg sound file \"%s\" uses ReplayGain (gain %f, peak %f)\n", filename, sfx->volume_mult, sfx->volume_peak);
 734         }
 735
 736         return true;
 737 }