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
OGG_OpenLibrary(void)44 qboolean OGG_OpenLibrary (void) {return true;}
OGG_CloseLibrary(void)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 */
OGG_OpenLibrary(void)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 */
OGG_CloseLibrary(void)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
ovcb_read(void * ptr,size_t size,size_t nb,void * datasource)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
ovcb_seek(void * datasource,ogg_int64_t offset,int whence)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
ovcb_close(void * ov_decode)387 static int ovcb_close (void *ov_decode)
388 {
389 return 0;
390 }
391
ovcb_tell(void * ov_decode)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 */
OGG_GetSamplesFloat(channel_t * ch,sfx_t * sfx,int firstsampleframe,int numsampleframes,float * outsamplesfloat)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 */
OGG_StopChannel(channel_t * ch)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 */
OGG_FreeSfx(sfx_t * sfx)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
OGG_DecodeTags(vorbis_comment * vc,unsigned int * start,unsigned int * length,unsigned int numsamples,double * peak,double * gaindb)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 */
OGG_LoadVorbisFile(const char * filename,sfx_t * sfx)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 }
719