+ Compiling fix
[xonotic/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 #ifdef LINK_TO_LIBVORBIS
31 #define OV_EXCLUDE_STATIC_CALLBACKS
32 #include <ogg/ogg.h>
33 #include <vorbis/vorbisfile.h>
34
35 #define qov_clear ov_clear
36 #define qov_info ov_info
37 #define qov_comment ov_comment
38 #define qov_open_callbacks ov_open_callbacks
39 #define qov_pcm_seek ov_pcm_seek
40 #define qov_pcm_total ov_pcm_total
41 #define qov_read ov_read
42 #define qvorbis_comment_query vorbis_comment_query
43
44 qboolean OGG_OpenLibrary (void) {return true;}
45 void OGG_CloseLibrary (void) {}
46 #else
47
48 /*
49 =================================================================
50
51   Minimal set of definitions from the Ogg Vorbis lib
52   (C) COPYRIGHT 1994-2001 by the XIPHOPHORUS Company
53   http://www.xiph.org/
54
55   WARNING: for a matter of simplicity, several pointer types are
56   casted to "void*", and most enumerated values are not included
57
58 =================================================================
59 */
60
61 #ifdef _MSC_VER
62 typedef __int64 ogg_int64_t;
63 #else
64 typedef long long ogg_int64_t;
65 #endif
66
67 typedef struct
68 {
69         size_t  (*read_func)    (void *ptr, size_t size, size_t nmemb, void *datasource);
70         int             (*seek_func)    (void *datasource, ogg_int64_t offset, int whence);
71         int             (*close_func)   (void *datasource);
72         long    (*tell_func)    (void *datasource);
73 } ov_callbacks;
74
75 typedef struct
76 {
77         unsigned char   *data;
78         int                             storage;
79         int                             fill;
80         int                             returned;
81         int                             unsynced;
82         int                             headerbytes;
83         int                             bodybytes;
84 } ogg_sync_state;
85
86 typedef struct
87 {
88         int             version;
89         int             channels;
90         long    rate;
91         long    bitrate_upper;
92         long    bitrate_nominal;
93         long    bitrate_lower;
94         long    bitrate_window;
95         void    *codec_setup;
96 } vorbis_info;
97
98 typedef struct
99 {
100         unsigned char   *body_data;
101         long                    body_storage;
102         long                    body_fill;
103         long                    body_returned;
104         int                             *lacing_vals;
105         ogg_int64_t             *granule_vals;
106         long                    lacing_storage;
107         long                    lacing_fill;
108         long                    lacing_packet;
109         long                    lacing_returned;
110         unsigned char   header[282];
111         int                             header_fill;
112         int                             e_o_s;
113         int                             b_o_s;
114         long                    serialno;
115         long                    pageno;
116         ogg_int64_t             packetno;
117         ogg_int64_t             granulepos;
118 } ogg_stream_state;
119
120 typedef struct
121 {
122         int                     analysisp;
123         vorbis_info     *vi;
124         float           **pcm;
125         float           **pcmret;
126         int                     pcm_storage;
127         int                     pcm_current;
128         int                     pcm_returned;
129         int                     preextrapolate;
130         int                     eofflag;
131         long            lW;
132         long            W;
133         long            nW;
134         long            centerW;
135         ogg_int64_t     granulepos;
136         ogg_int64_t     sequence;
137         ogg_int64_t     glue_bits;
138         ogg_int64_t     time_bits;
139         ogg_int64_t     floor_bits;
140         ogg_int64_t     res_bits;
141         void            *backend_state;
142 } vorbis_dsp_state;
143
144 typedef struct
145 {
146         long                    endbyte;
147         int                             endbit;
148         unsigned char   *buffer;
149         unsigned char   *ptr;
150         long                    storage;
151 } oggpack_buffer;
152
153 typedef struct
154 {
155         float                           **pcm;
156         oggpack_buffer          opb;
157         long                            lW;
158         long                            W;
159         long                            nW;
160         int                                     pcmend;
161         int                                     mode;
162         int                                     eofflag;
163         ogg_int64_t                     granulepos;
164         ogg_int64_t                     sequence;
165         vorbis_dsp_state        *vd;
166         void                            *localstore;
167         long                            localtop;
168         long                            localalloc;
169         long                            totaluse;
170         void                            *reap;  // VOIDED POINTER
171         long                            glue_bits;
172         long                            time_bits;
173         long                            floor_bits;
174         long                            res_bits;
175         void                            *internal;
176 } vorbis_block;
177
178 typedef struct
179 {
180         char **user_comments;
181         int   *comment_lengths;
182         int    comments;
183         char  *vendor;
184 } vorbis_comment;
185
186 typedef struct
187 {
188         void                            *datasource;
189         int                                     seekable;
190         ogg_int64_t                     offset;
191         ogg_int64_t                     end;
192         ogg_sync_state          oy;
193         int                                     links;
194         ogg_int64_t                     *offsets;
195         ogg_int64_t                     *dataoffsets;
196         long                            *serialnos;
197         ogg_int64_t                     *pcmlengths;
198         vorbis_info                     *vi;
199         vorbis_comment          *vc;
200         ogg_int64_t                     pcm_offset;
201         int                                     ready_state;
202         long                            current_serialno;
203         int                                     current_link;
204         double                          bittrack;
205         double                          samptrack;
206         ogg_stream_state        os;
207         vorbis_dsp_state        vd;
208         vorbis_block            vb;
209         ov_callbacks            callbacks;
210 } OggVorbis_File;
211
212
213 /*
214 =================================================================
215
216   DarkPlaces definitions
217
218 =================================================================
219 */
220
221 // Functions exported from the vorbisfile library
222 static int (*qov_clear) (OggVorbis_File *vf);
223 static vorbis_info* (*qov_info) (OggVorbis_File *vf,int link);
224 static vorbis_comment* (*qov_comment) (OggVorbis_File *vf,int link);
225 static char * (*qvorbis_comment_query) (vorbis_comment *vc, const char *tag, int count);
226 static int (*qov_open_callbacks) (void *datasource, OggVorbis_File *vf,
227                                                                   char *initial, long ibytes,
228                                                                   ov_callbacks callbacks);
229 static int (*qov_pcm_seek) (OggVorbis_File *vf,ogg_int64_t pos);
230 static ogg_int64_t (*qov_pcm_total) (OggVorbis_File *vf,int i);
231 static long (*qov_read) (OggVorbis_File *vf,char *buffer,int length,
232                                                  int bigendianp,int word,int sgned,int *bitstream);
233
234 static dllfunction_t vorbisfilefuncs[] =
235 {
236         {"ov_clear",                            (void **) &qov_clear},
237         {"ov_info",                                     (void **) &qov_info},
238         {"ov_comment",                          (void **) &qov_comment},
239         {"ov_open_callbacks",           (void **) &qov_open_callbacks},
240         {"ov_pcm_seek",                         (void **) &qov_pcm_seek},
241         {"ov_pcm_total",                        (void **) &qov_pcm_total},
242         {"ov_read",                                     (void **) &qov_read},
243         {NULL, NULL}
244 };
245
246 static dllfunction_t vorbisfuncs[] =
247 {
248         {"vorbis_comment_query",        (void **) &qvorbis_comment_query},
249         {NULL, NULL}
250 };
251
252 // Handles for the Vorbis and Vorbisfile DLLs
253 static dllhandle_t vo_dll = NULL;
254 static dllhandle_t vf_dll = NULL;
255
256
257 /*
258 =================================================================
259
260   DLL load & unload
261
262 =================================================================
263 */
264
265 /*
266 ====================
267 OGG_OpenLibrary
268
269 Try to load the VorbisFile DLL
270 ====================
271 */
272 qboolean OGG_OpenLibrary (void)
273 {
274         const char* dllnames_vo [] =
275         {
276 #if defined(WIN32)
277                 "libvorbis-0.dll",
278                 "libvorbis.dll",
279                 "vorbis.dll",
280 #elif defined(MACOSX)
281                 "libvorbis.dylib",
282 #else
283                 "libvorbis.so.0",
284                 "libvorbis.so",
285 #endif
286                 NULL
287         };
288         const char* dllnames_vf [] =
289         {
290 #if defined(WIN32)
291                 "libvorbisfile-3.dll",
292                 "libvorbisfile.dll",
293                 "vorbisfile.dll",
294 #elif defined(MACOSX)
295                 "libvorbisfile.dylib",
296 #else
297                 "libvorbisfile.so.3",
298                 "libvorbisfile.so",
299 #endif
300                 NULL
301         };
302
303         // Already loaded?
304         if (vf_dll)
305                 return true;
306
307 // COMMANDLINEOPTION: Sound: -novorbis disables ogg vorbis sound support
308         if (COM_CheckParm("-novorbis"))
309                 return false;
310
311         // Load the DLLs
312         // We need to load both by hand because some OSes seem to not load
313         // the vorbis DLL automatically when loading the VorbisFile DLL
314         return Sys_LoadLibrary (dllnames_vo, &vo_dll, vorbisfuncs) && Sys_LoadLibrary (dllnames_vf, &vf_dll, vorbisfilefuncs);
315 }
316
317
318 /*
319 ====================
320 OGG_CloseLibrary
321
322 Unload the VorbisFile DLL
323 ====================
324 */
325 void OGG_CloseLibrary (void)
326 {
327         Sys_UnloadLibrary (&vf_dll);
328         Sys_UnloadLibrary (&vo_dll);
329 }
330
331 #endif
332
333 /*
334 =================================================================
335
336         Ogg Vorbis decoding
337
338 =================================================================
339 */
340
341 typedef struct
342 {
343         unsigned char *buffer;
344         ogg_int64_t ind, buffsize;
345 } ov_decode_t;
346
347 static size_t ovcb_read (void *ptr, size_t size, size_t nb, void *datasource)
348 {
349         ov_decode_t *ov_decode = (ov_decode_t*)datasource;
350         size_t remain, len;
351
352         remain = ov_decode->buffsize - ov_decode->ind;
353         len = size * nb;
354         if (remain < len)
355                 len = remain - remain % size;
356
357         memcpy (ptr, ov_decode->buffer + ov_decode->ind, len);
358         ov_decode->ind += len;
359
360         return len / size;
361 }
362
363 static int ovcb_seek (void *datasource, ogg_int64_t offset, int whence)
364 {
365         ov_decode_t *ov_decode = (ov_decode_t*)datasource;
366
367         switch (whence)
368         {
369                 case SEEK_SET:
370                         break;
371                 case SEEK_CUR:
372                         offset += ov_decode->ind;
373                         break;
374                 case SEEK_END:
375                         offset += ov_decode->buffsize;
376                         break;
377                 default:
378                         return -1;
379         }
380         if (offset < 0 || offset > ov_decode->buffsize)
381                 return -1;
382
383         ov_decode->ind = offset;
384         return 0;
385 }
386
387 static int ovcb_close (void *ov_decode)
388 {
389         return 0;
390 }
391
392 static long ovcb_tell (void *ov_decode)
393 {
394         return ((ov_decode_t*)ov_decode)->ind;
395 }
396
397 // Per-sfx data structure
398 typedef struct
399 {
400         unsigned char   *file;
401         size_t                  filesize;
402 } ogg_stream_persfx_t;
403
404 // Per-channel data structure
405 typedef struct
406 {
407         OggVorbis_File  vf;
408         ov_decode_t             ov_decode;
409         int                             bs;
410         int                             buffer_firstframe;
411         int                             buffer_numframes;
412         unsigned char   buffer[STREAM_BUFFERSIZE*4];
413 } ogg_stream_perchannel_t;
414
415
416 static const ov_callbacks callbacks = {ovcb_read, ovcb_seek, ovcb_close, ovcb_tell};
417
418 /*
419 ====================
420 OGG_GetSamplesFloat
421 ====================
422 */
423 static void OGG_GetSamplesFloat (channel_t *ch, sfx_t *sfx, int firstsampleframe, int numsampleframes, float *outsamplesfloat)
424 {
425         ogg_stream_perchannel_t *per_ch = (ogg_stream_perchannel_t *)ch->fetcher_data;
426         ogg_stream_persfx_t *per_sfx = (ogg_stream_persfx_t *)sfx->fetcher_data;
427         int f = sfx->format.width * sfx->format.channels; // bytes per frame in the buffer
428         short *buf;
429         int i, len;
430         int newlength, done, ret;
431
432         // if this channel does not yet have a channel fetcher, make one
433         if (per_ch == NULL)
434         {
435                 // allocate a struct to keep track of our file position and buffer
436                 per_ch = (ogg_stream_perchannel_t *)Mem_Alloc(snd_mempool, sizeof(*per_ch));
437                 // begin decoding the file
438                 per_ch->ov_decode.buffer = per_sfx->file;
439                 per_ch->ov_decode.ind = 0;
440                 per_ch->ov_decode.buffsize = per_sfx->filesize;
441                 if (qov_open_callbacks(&per_ch->ov_decode, &per_ch->vf, NULL, 0, callbacks) < 0)
442                 {
443                         // this never happens - this function succeeded earlier on the same data
444                         Mem_Free(per_ch);
445                         return;
446                 }
447                 per_ch->bs = 0;
448                 per_ch->buffer_firstframe = 0;
449                 per_ch->buffer_numframes = 0;
450                 // attach the struct to our channel
451                 ch->fetcher_data = (void *)per_ch;
452         }
453
454         // if the request is too large for our buffer, loop...
455         while (numsampleframes * f > (int)sizeof(per_ch->buffer))
456         {
457                 done = sizeof(per_ch->buffer) / f;
458                 OGG_GetSamplesFloat(ch, sfx, firstsampleframe, done, outsamplesfloat);
459                 firstsampleframe += done;
460                 numsampleframes -= done;
461                 outsamplesfloat += done * sfx->format.channels;
462         }
463
464         // seek if the request is before the current buffer (loop back)
465         // seek if the request starts beyond the current buffer by at least one frame (channel was zero volume for a while)
466         // do not seek if the request overlaps the buffer end at all (expected behavior)
467         if (per_ch->buffer_firstframe > firstsampleframe || per_ch->buffer_firstframe + per_ch->buffer_numframes < firstsampleframe)
468         {
469                 // we expect to decode forward from here so this will be our new buffer start
470                 per_ch->buffer_firstframe = firstsampleframe;
471                 per_ch->buffer_numframes = 0;
472                 ret = qov_pcm_seek(&per_ch->vf, (ogg_int64_t)firstsampleframe);
473                 if (ret != 0)
474                 {
475                         // LordHavoc: we can't Con_Printf here, not thread safe...
476                         //Con_Printf("OGG_FetchSound: qov_pcm_seek(..., %d) returned %d\n", firstsampleframe, ret);
477                         return;
478                 }
479         }
480
481         // decompress the file as needed
482         if (firstsampleframe + numsampleframes > per_ch->buffer_firstframe + per_ch->buffer_numframes)
483         {
484                 // first slide the buffer back, discarding any data preceding the range we care about
485                 int offset = firstsampleframe - per_ch->buffer_firstframe;
486                 int keeplength = per_ch->buffer_numframes - offset;
487                 if (keeplength > 0)
488                         memmove(per_ch->buffer, per_ch->buffer + offset * sfx->format.width * sfx->format.channels, keeplength * sfx->format.width * sfx->format.channels);
489                 per_ch->buffer_firstframe = firstsampleframe;
490                 per_ch->buffer_numframes -= offset;
491                 // decompress as much as we can fit in the buffer
492                 newlength = sizeof(per_ch->buffer) - per_ch->buffer_numframes * f;
493                 done = 0;
494                 while (newlength > done && (ret = qov_read(&per_ch->vf, (char *)per_ch->buffer + per_ch->buffer_numframes * f + done, (int)(newlength - done), mem_bigendian, 2, 1, &per_ch->bs)) > 0)
495                         done += ret;
496                 // clear the missing space if any
497                 if (done < newlength)
498                         memset(per_ch->buffer + done, 0, newlength - done);
499                 // we now have more data in the buffer
500                 per_ch->buffer_numframes += done / f;
501         }
502
503         // convert the sample format for the caller
504         buf = (short *)((char *)per_ch->buffer + (firstsampleframe - per_ch->buffer_firstframe) * f);
505         len = numsampleframes * sfx->format.channels;
506         for (i = 0;i < len;i++)
507                 outsamplesfloat[i] = buf[i] * (1.0f / 32768.0f);
508 }
509
510
511 /*
512 ====================
513 OGG_StopChannel
514 ====================
515 */
516 static void OGG_StopChannel(channel_t *ch)
517 {
518         ogg_stream_perchannel_t *per_ch = (ogg_stream_perchannel_t *)ch->fetcher_data;
519         if (per_ch != NULL)
520         {
521                 // release the vorbis decompressor
522                 qov_clear(&per_ch->vf);
523                 Mem_Free(per_ch);
524         }
525 }
526
527
528 /*
529 ====================
530 OGG_FreeSfx
531 ====================
532 */
533 static void OGG_FreeSfx(sfx_t *sfx)
534 {
535         ogg_stream_persfx_t *per_sfx = (ogg_stream_persfx_t *)sfx->fetcher_data;
536         // free the complete file we were keeping around
537         Mem_Free(per_sfx->file);
538         // free the file information structure
539         Mem_Free(per_sfx);
540 }
541
542
543 static const snd_fetcher_t ogg_fetcher = {OGG_GetSamplesFloat, OGG_StopChannel, OGG_FreeSfx};
544
545 static void OGG_DecodeTags(vorbis_comment *vc, unsigned int *start, unsigned int *length, unsigned int numsamples, double *peak, double *gaindb)
546 {
547         const char *startcomment = NULL, *lengthcomment = NULL, *endcomment = NULL, *thiscomment = NULL;
548
549         *start = numsamples;
550         *length = numsamples;
551         *peak = 0.0;
552         *gaindb = 0.0;
553
554         if(!vc)
555                 return;
556
557         thiscomment = qvorbis_comment_query(vc, "REPLAYGAIN_TRACK_PEAK", 0);
558         if(thiscomment)
559                 *peak = atof(thiscomment);
560         thiscomment = qvorbis_comment_query(vc, "REPLAYGAIN_TRACK_GAIN", 0);
561         if(thiscomment)
562                 *gaindb = atof(thiscomment);
563         
564         startcomment = qvorbis_comment_query(vc, "LOOP_START", 0); // DarkPlaces, and some Japanese app
565         if(startcomment)
566         {
567                 endcomment = qvorbis_comment_query(vc, "LOOP_END", 0);
568                 if(!endcomment)
569                         lengthcomment = qvorbis_comment_query(vc, "LOOP_LENGTH", 0);
570         }
571         else
572         {
573                 startcomment = qvorbis_comment_query(vc, "LOOPSTART", 0); // RPG Maker VX
574                 if(startcomment)
575                 {
576                         lengthcomment = qvorbis_comment_query(vc, "LOOPLENGTH", 0);
577                         if(!lengthcomment)
578                                 endcomment = qvorbis_comment_query(vc, "LOOPEND", 0);
579                 }
580                 else
581                 {
582                         startcomment = qvorbis_comment_query(vc, "LOOPPOINT", 0); // Sonic Robo Blast 2
583                 }
584         }
585
586         if(startcomment)
587         {
588                 *start = (unsigned int) bound(0, atof(startcomment), numsamples);
589                 if(endcomment)
590                         *length = (unsigned int) bound(0, atof(endcomment), numsamples);
591                 else if(lengthcomment)
592                         *length = (unsigned int) bound(0, *start + atof(lengthcomment), numsamples);
593         }
594 }
595
596 /*
597 ====================
598 OGG_LoadVorbisFile
599
600 Load an Ogg Vorbis file into memory
601 ====================
602 */
603 qboolean OGG_LoadVorbisFile(const char *filename, sfx_t *sfx)
604 {
605         unsigned char *data;
606         fs_offset_t filesize;
607         ov_decode_t ov_decode;
608         OggVorbis_File vf;
609         vorbis_info *vi;
610         vorbis_comment *vc;
611         double peak, gaindb;
612
613 #ifndef LINK_TO_LIBVORBIS
614         if (!vf_dll)
615                 return false;
616 #endif
617
618         // Return if already loaded
619         if (sfx->fetcher != NULL)
620                 return true;
621
622         // Load the file completely
623         data = FS_LoadFile(filename, snd_mempool, false, &filesize);
624         if (data == NULL)
625                 return false;
626
627         if (developer_loading.integer >= 2)
628                 Con_Printf("Loading Ogg Vorbis file \"%s\"\n", filename);
629
630         // Open it with the VorbisFile API
631         ov_decode.buffer = data;
632         ov_decode.ind = 0;
633         ov_decode.buffsize = filesize;
634         if (qov_open_callbacks(&ov_decode, &vf, NULL, 0, callbacks) < 0)
635         {
636                 Con_Printf("error while opening Ogg Vorbis file \"%s\"\n", filename);
637                 Mem_Free(data);
638                 return false;
639         }
640
641         // Get the stream information
642         vi = qov_info(&vf, -1);
643         if (vi->channels < 1 || vi->channels > 2)
644         {
645                 Con_Printf("%s has an unsupported number of channels (%i)\n",
646                                         sfx->name, vi->channels);
647                 qov_clear (&vf);
648                 Mem_Free(data);
649                 return false;
650         }
651
652         sfx->format.speed = vi->rate;
653         sfx->format.channels = vi->channels;
654         sfx->format.width = 2;  // We always work with 16 bits samples
655
656         sfx->total_length = qov_pcm_total(&vf, -1);
657
658         if (snd_streaming.integer && (snd_streaming.integer >= 2 || sfx->total_length > max(sizeof(ogg_stream_perchannel_t), snd_streaming_length.value * sfx->format.speed)))
659         {
660                 // large sounds use the OGG fetcher to decode the file on demand (but the entire file is held in memory)
661                 ogg_stream_persfx_t* per_sfx;
662                 if (developer_loading.integer >= 2)
663                         Con_Printf("Ogg sound file \"%s\" will be streamed\n", filename);
664                 per_sfx = (ogg_stream_persfx_t *)Mem_Alloc(snd_mempool, sizeof(*per_sfx));
665                 sfx->memsize += sizeof (*per_sfx);
666                 per_sfx->file = data;
667                 per_sfx->filesize = filesize;
668                 sfx->memsize += filesize;
669                 sfx->fetcher_data = per_sfx;
670                 sfx->fetcher = &ogg_fetcher;
671                 sfx->flags |= SFXFLAG_STREAMED;
672                 vc = qov_comment(&vf, -1);
673                 OGG_DecodeTags(vc, &sfx->loopstart, &sfx->total_length, sfx->total_length, &peak, &gaindb);
674                 qov_clear(&vf);
675         }
676         else
677         {
678                 // small sounds are entirely loaded and use the PCM fetcher
679                 char *buff;
680                 ogg_int64_t len;
681                 ogg_int64_t done;
682                 int bs;
683                 long ret;
684                 if (developer_loading.integer >= 2)
685                         Con_Printf ("Ogg sound file \"%s\" will be cached\n", filename);
686                 len = sfx->total_length * sfx->format.channels * sfx->format.width;
687                 sfx->flags &= ~SFXFLAG_STREAMED;
688                 sfx->memsize += len;
689                 sfx->fetcher = &wav_fetcher;
690                 sfx->fetcher_data = Mem_Alloc(snd_mempool, (size_t)len);
691                 buff = (char *)sfx->fetcher_data;
692                 done = 0;
693                 bs = 0;
694                 while ((ret = qov_read(&vf, &buff[done], (int)(len - done), mem_bigendian, 2, 1, &bs)) > 0)
695                         done += ret;
696                 vc = qov_comment(&vf, -1);
697                 OGG_DecodeTags(vc, &sfx->loopstart, &sfx->total_length, sfx->total_length, &peak, &gaindb);
698                 qov_clear(&vf);
699                 Mem_Free(data);
700         }
701
702         if(peak)
703         {
704                 sfx->volume_mult = min(1.0f / peak, exp(gaindb * 0.05f * log(10.0f)));
705                 sfx->volume_peak = peak;
706                 if (developer_loading.integer >= 2)
707                         Con_Printf ("Ogg sound file \"%s\" uses ReplayGain (gain %f, peak %f)\n", filename, sfx->volume_mult, sfx->volume_peak);
708         }
709         else if(gaindb != 0)
710         {
711                 sfx->volume_mult = min(1.0f / peak, exp(gaindb * 0.05f * log(10.0f)));
712                 sfx->volume_peak = 1.0; // if peak is not defined, we won't trust it
713                 if (developer_loading.integer >= 2)
714                         Con_Printf ("Ogg sound file \"%s\" uses ReplayGain (gain %f, peak not defined and assumed to be %f)\n", filename, sfx->volume_mult, sfx->volume_peak);
715         }
716
717         return true;
718 }