508614086ca88244115c5b8024718f83a1fc63b9
[divverent/darkplaces.git] / 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         {"vorbis_comment_query",        (void **) &qvorbis_comment_query},
223         {"ov_open_callbacks",           (void **) &qov_open_callbacks},
224         {"ov_pcm_seek",                         (void **) &qov_pcm_seek},
225         {"ov_pcm_total",                        (void **) &qov_pcm_total},
226         {"ov_read",                                     (void **) &qov_read},
227         {NULL, NULL}
228 };
229
230 static dllfunction_t vorbisfuncs[] =
231 {
232         {"vorbis_comment_query",        (void **) &qvorbis_comment_query},
233         {NULL, NULL}
234 };
235
236 // Handles for the Vorbis and Vorbisfile DLLs
237 static dllhandle_t vo_dll = NULL;
238 static dllhandle_t vf_dll = NULL;
239
240 typedef struct
241 {
242         unsigned char *buffer;
243         ogg_int64_t ind, buffsize;
244 } ov_decode_t;
245
246
247 static size_t ovcb_read (void *ptr, size_t size, size_t nb, void *datasource)
248 {
249         ov_decode_t *ov_decode = (ov_decode_t*)datasource;
250         size_t remain, len;
251
252         remain = ov_decode->buffsize - ov_decode->ind;
253         len = size * nb;
254         if (remain < len)
255                 len = remain - remain % size;
256
257         memcpy (ptr, ov_decode->buffer + ov_decode->ind, len);
258         ov_decode->ind += len;
259
260         return len / size;
261 }
262
263 static int ovcb_seek (void *datasource, ogg_int64_t offset, int whence)
264 {
265         ov_decode_t *ov_decode = (ov_decode_t*)datasource;
266
267         switch (whence)
268         {
269                 case SEEK_SET:
270                         break;
271                 case SEEK_CUR:
272                         offset += ov_decode->ind;
273                         break;
274                 case SEEK_END:
275                         offset += ov_decode->buffsize;
276                         break;
277                 default:
278                         return -1;
279         }
280         if (offset < 0 || offset > ov_decode->buffsize)
281                 return -1;
282
283         ov_decode->ind = offset;
284         return 0;
285 }
286
287 static int ovcb_close (void *ov_decode)
288 {
289         return 0;
290 }
291
292 static long ovcb_tell (void *ov_decode)
293 {
294         return ((ov_decode_t*)ov_decode)->ind;
295 }
296
297
298 /*
299 =================================================================
300
301   DLL load & unload
302
303 =================================================================
304 */
305
306 /*
307 ====================
308 OGG_OpenLibrary
309
310 Try to load the VorbisFile DLL
311 ====================
312 */
313 qboolean OGG_OpenLibrary (void)
314 {
315         const char* dllnames_vo [] =
316         {
317 #if defined(WIN64)
318                 "libvorbis64.dll",
319 #elif defined(WIN32)
320                 "libvorbis.dll",
321                 "vorbis.dll",
322 #elif defined(MACOSX)
323                 "libvorbis.dylib",
324 #else
325                 "libvorbis.so.0",
326                 "libvorbis.so",
327 #endif
328                 NULL
329         };
330         const char* dllnames_vf [] =
331         {
332 #if defined(WIN64)
333                 "libvorbisfile64.dll",
334 #elif defined(WIN32)
335                 "libvorbisfile.dll",
336                 "vorbisfile.dll",
337 #elif defined(MACOSX)
338                 "libvorbisfile.dylib",
339 #else
340                 "libvorbisfile.so.3",
341                 "libvorbisfile.so",
342 #endif
343                 NULL
344         };
345
346         // Already loaded?
347         if (vf_dll)
348                 return true;
349
350 // COMMANDLINEOPTION: Sound: -novorbis disables ogg vorbis sound support
351         if (COM_CheckParm("-novorbis"))
352                 return false;
353
354         // Load the DLLs
355         // We need to load both by hand because some OSes seem to not load
356         // the vorbis DLL automatically when loading the VorbisFile DLL
357         if (! Sys_LoadLibrary (dllnames_vo, &vo_dll, vorbisfuncs) ||
358                 ! Sys_LoadLibrary (dllnames_vf, &vf_dll, vorbisfilefuncs))
359         {
360                 Sys_UnloadLibrary (&vo_dll);
361                 Con_Printf ("Ogg Vorbis support disabled\n");
362                 return false;
363         }
364
365         Con_Printf ("Ogg Vorbis support enabled\n");
366         return true;
367 }
368
369
370 /*
371 ====================
372 OGG_CloseLibrary
373
374 Unload the VorbisFile DLL
375 ====================
376 */
377 void OGG_CloseLibrary (void)
378 {
379         Sys_UnloadLibrary (&vf_dll);
380         Sys_UnloadLibrary (&vo_dll);
381 }
382
383
384 /*
385 =================================================================
386
387         Ogg Vorbis decoding
388
389 =================================================================
390 */
391
392 #define STREAM_BUFFER_DURATION 1.5f     // 1.5 sec
393 #define STREAM_BUFFER_SIZE(format_ptr) ((int)(ceil (STREAM_BUFFER_DURATION * ((format_ptr)->speed * (format_ptr)->width * (format_ptr)->channels))))
394
395 // We work with 1 sec sequences, so this buffer must be able to contain
396 // 1 sec of sound of the highest quality (48 KHz, 16 bit samples, stereo)
397 static unsigned char resampling_buffer [48000 * 2 * 2];
398
399
400 // Per-sfx data structure
401 typedef struct
402 {
403         unsigned char   *file;
404         size_t                  filesize;
405         snd_format_t    format;
406 } ogg_stream_persfx_t;
407
408 // Per-channel data structure
409 typedef struct
410 {
411         OggVorbis_File  vf;
412         ov_decode_t             ov_decode;
413         unsigned int    sb_offset;
414         int                             bs;
415         snd_buffer_t    sb;             // must be at the end due to its dynamically allocated size
416 } ogg_stream_perchannel_t;
417
418
419 static const ov_callbacks callbacks = {ovcb_read, ovcb_seek, ovcb_close, ovcb_tell};
420
421 /*
422 ====================
423 OGG_FetchSound
424 ====================
425 */
426 static const snd_buffer_t* OGG_FetchSound (channel_t* ch, unsigned int* start, unsigned int nbsampleframes)
427 {
428         ogg_stream_perchannel_t* per_ch;
429         sfx_t* sfx;
430         ogg_stream_persfx_t* per_sfx;
431         snd_buffer_t* sb;
432         int newlength, done, ret, bigendian;
433         unsigned int real_start;
434         unsigned int factor;
435
436         per_ch = (ogg_stream_perchannel_t *)ch->fetcher_data;
437         sfx = ch->sfx;
438         per_sfx = (ogg_stream_persfx_t *)sfx->fetcher_data;
439
440         // If there's no fetcher structure attached to the channel yet
441         if (per_ch == NULL)
442         {
443                 size_t buff_len, memsize;
444                 snd_format_t sb_format;
445
446                 sb_format.speed = snd_renderbuffer->format.speed;
447                 sb_format.width = per_sfx->format.width;
448                 sb_format.channels = per_sfx->format.channels;
449
450                 buff_len = STREAM_BUFFER_SIZE(&sb_format);
451                 memsize = sizeof (*per_ch) - sizeof (per_ch->sb.samples) + buff_len;
452                 per_ch = (ogg_stream_perchannel_t *)Mem_Alloc (snd_mempool, memsize);
453                 sfx->memsize += memsize;
454
455                 // Open it with the VorbisFile API
456                 per_ch->ov_decode.buffer = per_sfx->file;
457                 per_ch->ov_decode.ind = 0;
458                 per_ch->ov_decode.buffsize = per_sfx->filesize;
459                 if (qov_open_callbacks (&per_ch->ov_decode, &per_ch->vf, NULL, 0, callbacks) < 0)
460                 {
461                         Con_Printf("error while reading Ogg Vorbis stream \"%s\"\n", sfx->name);
462                         Mem_Free (per_ch);
463                         return NULL;
464                 }
465                 per_ch->bs = 0;
466
467                 per_ch->sb_offset = 0;
468                 per_ch->sb.format = sb_format;
469                 per_ch->sb.nbframes = 0;
470                 per_ch->sb.maxframes = buff_len / (per_ch->sb.format.channels * per_ch->sb.format.width);
471
472                 ch->fetcher_data = per_ch;
473         }
474
475         real_start = *start;
476
477         sb = &per_ch->sb;
478         factor = per_sfx->format.width * per_sfx->format.channels;
479
480         // If the stream buffer can't contain that much samples anyway
481         if (nbsampleframes > sb->maxframes)
482         {
483                 Con_Printf ("OGG_FetchSound: stream buffer too small (%u sample frames required)\n", nbsampleframes);
484                 return NULL;
485         }
486
487         // If the data we need has already been decompressed in the sfxbuffer, just return it
488         if (per_ch->sb_offset <= real_start && per_ch->sb_offset + sb->nbframes >= real_start + nbsampleframes)
489         {
490                 *start = per_ch->sb_offset;
491                 return sb;
492         }
493
494         newlength = (int)(per_ch->sb_offset + sb->nbframes) - real_start;
495
496         // If we need to skip some data before decompressing the rest, or if the stream has looped
497         if (newlength < 0 || per_ch->sb_offset > real_start)
498         {
499                 unsigned int time_start;
500                 ogg_int64_t ogg_start;
501                 int err;
502
503                 if (real_start > (unsigned int)sfx->total_length)
504                 {
505                         Con_Printf ("OGG_FetchSound: asked for a start position after the end of the sfx! (%u > %u)\n",
506                                                 real_start, sfx->total_length);
507                         return NULL;
508                 }
509
510                 // We work with 200ms (1/5 sec) steps to avoid rounding errors
511                 time_start = real_start * 5 / snd_renderbuffer->format.speed;
512                 ogg_start = time_start * (per_sfx->format.speed / 5);
513                 err = qov_pcm_seek (&per_ch->vf, ogg_start);
514                 if (err != 0)
515                 {
516                         Con_Printf ("OGG_FetchSound: qov_pcm_seek(..., %d) returned %d\n",
517                                                 real_start, err);
518                         return NULL;
519                 }
520                 sb->nbframes = 0;
521
522                 real_start = (float)ogg_start / per_sfx->format.speed * snd_renderbuffer->format.speed;
523                 if (*start - real_start + nbsampleframes > sb->maxframes)
524                 {
525                         Con_Printf ("OGG_FetchSound: stream buffer too small after seek (%u sample frames required)\n",
526                                                 *start - real_start + nbsampleframes);
527                         per_ch->sb_offset = real_start;
528                         return NULL;
529                 }
530         }
531         // Else, move forward the samples we need to keep in the sound buffer
532         else
533         {
534                 memmove (sb->samples, sb->samples + (real_start - per_ch->sb_offset) * factor, newlength * factor);
535                 sb->nbframes = newlength;
536         }
537
538         per_ch->sb_offset = real_start;
539
540         // We add exactly 1 sec of sound to the buffer:
541         // 1- to ensure we won't lose any sample during the resampling process
542         // 2- to force one call to OGG_FetchSound per second to regulate the workload
543         if (sb->format.speed + sb->nbframes > sb->maxframes)
544         {
545                 Con_Printf ("OGG_FetchSound: stream buffer overflow (%u sample frames / %u)\n",
546                                         sb->format.speed + sb->nbframes, sb->maxframes);
547                 return NULL;
548         }
549         newlength = per_sfx->format.speed * factor;  // -> 1 sec of sound before resampling
550
551         // Decompress in the resampling_buffer
552 #if BYTE_ORDER == BIG_ENDIAN
553         bigendian = 1;
554 #else
555         bigendian = 0;
556 #endif
557         done = 0;
558         while ((ret = qov_read (&per_ch->vf, (char *)&resampling_buffer[done], (int)(newlength - done), bigendian, 2, 1, &per_ch->bs)) > 0)
559                 done += ret;
560
561         Snd_AppendToSndBuffer (sb, resampling_buffer, (size_t)done / (size_t)factor, &per_sfx->format);
562
563         *start = per_ch->sb_offset;
564         return sb;
565 }
566
567
568 /*
569 ====================
570 OGG_FetchEnd
571 ====================
572 */
573 static void OGG_FetchEnd (channel_t* ch)
574 {
575         ogg_stream_perchannel_t* per_ch;
576
577         per_ch = (ogg_stream_perchannel_t *)ch->fetcher_data;
578         if (per_ch != NULL)
579         {
580                 size_t buff_len;
581
582                 // Free the ogg vorbis decoder
583                 qov_clear (&per_ch->vf);
584
585                 buff_len = per_ch->sb.maxframes * per_ch->sb.format.channels * per_ch->sb.format.width;
586                 ch->sfx->memsize -= sizeof (*per_ch) - sizeof (per_ch->sb.samples) + buff_len;
587
588                 Mem_Free (per_ch);
589                 ch->fetcher_data = NULL;
590         }
591 }
592
593
594 /*
595 ====================
596 OGG_FreeSfx
597 ====================
598 */
599 static void OGG_FreeSfx (sfx_t* sfx)
600 {
601         ogg_stream_persfx_t* per_sfx = (ogg_stream_persfx_t *)sfx->fetcher_data;
602
603         // Free the Ogg Vorbis file
604         Mem_Free(per_sfx->file);
605         sfx->memsize -= per_sfx->filesize;
606
607         // Free the stream structure
608         Mem_Free(per_sfx);
609         sfx->memsize -= sizeof (*per_sfx);
610
611         sfx->fetcher_data = NULL;
612         sfx->fetcher = NULL;
613 }
614
615
616 /*
617 ====================
618 OGG_GetFormat
619 ====================
620 */
621 static const snd_format_t* OGG_GetFormat (sfx_t* sfx)
622 {
623         ogg_stream_persfx_t* per_sfx = (ogg_stream_persfx_t *)sfx->fetcher_data;
624         return &per_sfx->format;
625 }
626
627 static const snd_fetcher_t ogg_fetcher = { OGG_FetchSound, OGG_FetchEnd, OGG_FreeSfx, OGG_GetFormat };
628
629
630 /*
631 ====================
632 OGG_LoadVorbisFile
633
634 Load an Ogg Vorbis file into memory
635 ====================
636 */
637 qboolean OGG_LoadVorbisFile (const char *filename, sfx_t *sfx)
638 {
639         unsigned char *data;
640         const char *loopcomment;
641         fs_offset_t filesize;
642         ov_decode_t ov_decode;
643         OggVorbis_File vf;
644         vorbis_info *vi;
645         vorbis_comment *vc;
646         ogg_int64_t len, buff_len;
647
648         if (!vf_dll)
649                 return false;
650
651         // Already loaded?
652         if (sfx->fetcher != NULL)
653                 return true;
654
655         // Load the file
656         data = FS_LoadFile (filename, snd_mempool, false, &filesize);
657         if (data == NULL)
658                 return false;
659
660         Con_DPrintf ("Loading Ogg Vorbis file \"%s\"\n", filename);
661
662         // Open it with the VorbisFile API
663         ov_decode.buffer = data;
664         ov_decode.ind = 0;
665         ov_decode.buffsize = filesize;
666         if (qov_open_callbacks (&ov_decode, &vf, NULL, 0, callbacks) < 0)
667         {
668                 Con_Printf ("error while opening Ogg Vorbis file \"%s\"\n", filename);
669                 Mem_Free(data);
670                 return false;
671         }
672
673         // Get the stream information
674         vi = qov_info (&vf, -1);
675         if (vi->channels < 1 || vi->channels > 2)
676         {
677                 Con_Printf("%s has an unsupported number of channels (%i)\n",
678                                         sfx->name, vi->channels);
679                 qov_clear (&vf);
680                 Mem_Free(data);
681                 return false;
682         }
683
684         len = qov_pcm_total (&vf, -1) * vi->channels * 2;  // 16 bits => "* 2"
685
686         // Decide if we go for a stream or a simple PCM cache
687         buff_len = (int)ceil (STREAM_BUFFER_DURATION * (snd_renderbuffer->format.speed * 2 * vi->channels));
688         if (snd_streaming.integer && len > (ogg_int64_t)filesize + 3 * buff_len)
689         {
690                 ogg_stream_persfx_t* per_sfx;
691
692                 Con_DPrintf ("\"%s\" will be streamed\n", filename);
693                 per_sfx = (ogg_stream_persfx_t *)Mem_Alloc (snd_mempool, sizeof (*per_sfx));
694                 sfx->memsize += sizeof (*per_sfx);
695                 per_sfx->file = data;
696                 per_sfx->filesize = filesize;
697                 sfx->memsize += filesize;
698
699                 per_sfx->format.speed = vi->rate;
700                 per_sfx->format.width = 2;  // We always work with 16 bits samples
701                 per_sfx->format.channels = vi->channels;
702
703                 sfx->fetcher_data = per_sfx;
704                 sfx->fetcher = &ogg_fetcher;
705                 sfx->flags |= SFXFLAG_STREAMED;
706                 sfx->total_length = (int)((size_t)len / (per_sfx->format.channels * 2) * ((double)snd_renderbuffer->format.speed / per_sfx->format.speed));
707                 sfx->loopstart = sfx->total_length;
708                 vc = qov_comment(&vf, -1);
709                 if(vc)
710                 {
711                         loopcomment = qvorbis_comment_query(vc, "LOOP_START", 0);
712                         if(loopcomment)
713                                 sfx->loopstart = bound(0, (unsigned int) (atof(loopcomment) * (double)snd_renderbuffer->format.speed / (double)per_sfx->format.speed), sfx->total_length);
714                 }
715         }
716         else
717         {
718                 char *buff;
719                 ogg_int64_t done;
720                 int bs, bigendian;
721                 long ret;
722                 snd_buffer_t *sb;
723                 snd_format_t ogg_format;
724
725                 Con_DPrintf ("\"%s\" will be cached\n", filename);
726
727                 // Decode it
728                 buff = (char *)Mem_Alloc (snd_mempool, (int)len);
729                 done = 0;
730                 bs = 0;
731 #if BYTE_ORDER == BIG_ENDIAN
732                 bigendian = 1;
733 #else
734                 bigendian = 0;
735 #endif
736                 while ((ret = qov_read (&vf, &buff[done], (int)(len - done), bigendian, 2, 1, &bs)) > 0)
737                         done += ret;
738
739                 // Build the sound buffer
740                 ogg_format.speed = vi->rate;
741                 ogg_format.channels = vi->channels;
742                 ogg_format.width = 2;  // We always work with 16 bits samples
743                 sb = Snd_CreateSndBuffer ((unsigned char *)buff, (size_t)done / (vi->channels * 2), &ogg_format, snd_renderbuffer->format.speed);
744                 if (sb == NULL)
745                 {
746                         qov_clear (&vf);
747                         Mem_Free (data);
748                         Mem_Free (buff);
749                         return false;
750                 }
751
752                 sfx->fetcher = &wav_fetcher;
753                 sfx->fetcher_data = sb;
754
755                 sfx->total_length = sb->nbframes;
756                 sfx->memsize += sb->maxframes * sb->format.channels * sb->format.width + sizeof (*sb) - sizeof (sb->samples);
757
758                 sfx->loopstart = sfx->total_length;
759                 sfx->flags &= ~SFXFLAG_STREAMED;
760                 vc = qov_comment(&vf, -1);
761                 if(vc)
762                 {
763                         loopcomment = qvorbis_comment_query(vc, "LOOP_START", 0);
764                         if(loopcomment)
765                                 sfx->loopstart = bound(0, (unsigned int) (atoi(loopcomment) * (double)snd_renderbuffer->format.speed / (double)sb->format.speed), sfx->total_length);
766                 }
767
768                 qov_clear (&vf);
769                 Mem_Free (data);
770                 Mem_Free (buff);
771         }
772
773         return true;
774 }