File: snd_main.c

package info (click to toggle)
darkplaces 0~20180412~beta1-2
  • links: PTS, VCS
  • area: main
  • in suites: buster
  • size: 18,200 kB
  • sloc: ansic: 176,886; makefile: 485; pascal: 455; perl: 372; objc: 245; sh: 102
file content (2343 lines) | stat: -rw-r--r-- 77,997 bytes parent folder | download | duplicates (2)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
1558
1559
1560
1561
1562
1563
1564
1565
1566
1567
1568
1569
1570
1571
1572
1573
1574
1575
1576
1577
1578
1579
1580
1581
1582
1583
1584
1585
1586
1587
1588
1589
1590
1591
1592
1593
1594
1595
1596
1597
1598
1599
1600
1601
1602
1603
1604
1605
1606
1607
1608
1609
1610
1611
1612
1613
1614
1615
1616
1617
1618
1619
1620
1621
1622
1623
1624
1625
1626
1627
1628
1629
1630
1631
1632
1633
1634
1635
1636
1637
1638
1639
1640
1641
1642
1643
1644
1645
1646
1647
1648
1649
1650
1651
1652
1653
1654
1655
1656
1657
1658
1659
1660
1661
1662
1663
1664
1665
1666
1667
1668
1669
1670
1671
1672
1673
1674
1675
1676
1677
1678
1679
1680
1681
1682
1683
1684
1685
1686
1687
1688
1689
1690
1691
1692
1693
1694
1695
1696
1697
1698
1699
1700
1701
1702
1703
1704
1705
1706
1707
1708
1709
1710
1711
1712
1713
1714
1715
1716
1717
1718
1719
1720
1721
1722
1723
1724
1725
1726
1727
1728
1729
1730
1731
1732
1733
1734
1735
1736
1737
1738
1739
1740
1741
1742
1743
1744
1745
1746
1747
1748
1749
1750
1751
1752
1753
1754
1755
1756
1757
1758
1759
1760
1761
1762
1763
1764
1765
1766
1767
1768
1769
1770
1771
1772
1773
1774
1775
1776
1777
1778
1779
1780
1781
1782
1783
1784
1785
1786
1787
1788
1789
1790
1791
1792
1793
1794
1795
1796
1797
1798
1799
1800
1801
1802
1803
1804
1805
1806
1807
1808
1809
1810
1811
1812
1813
1814
1815
1816
1817
1818
1819
1820
1821
1822
1823
1824
1825
1826
1827
1828
1829
1830
1831
1832
1833
1834
1835
1836
1837
1838
1839
1840
1841
1842
1843
1844
1845
1846
1847
1848
1849
1850
1851
1852
1853
1854
1855
1856
1857
1858
1859
1860
1861
1862
1863
1864
1865
1866
1867
1868
1869
1870
1871
1872
1873
1874
1875
1876
1877
1878
1879
1880
1881
1882
1883
1884
1885
1886
1887
1888
1889
1890
1891
1892
1893
1894
1895
1896
1897
1898
1899
1900
1901
1902
1903
1904
1905
1906
1907
1908
1909
1910
1911
1912
1913
1914
1915
1916
1917
1918
1919
1920
1921
1922
1923
1924
1925
1926
1927
1928
1929
1930
1931
1932
1933
1934
1935
1936
1937
1938
1939
1940
1941
1942
1943
1944
1945
1946
1947
1948
1949
1950
1951
1952
1953
1954
1955
1956
1957
1958
1959
1960
1961
1962
1963
1964
1965
1966
1967
1968
1969
1970
1971
1972
1973
1974
1975
1976
1977
1978
1979
1980
1981
1982
1983
1984
1985
1986
1987
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
2015
2016
2017
2018
2019
2020
2021
2022
2023
2024
2025
2026
2027
2028
2029
2030
2031
2032
2033
2034
2035
2036
2037
2038
2039
2040
2041
2042
2043
2044
2045
2046
2047
2048
2049
2050
2051
2052
2053
2054
2055
2056
2057
2058
2059
2060
2061
2062
2063
2064
2065
2066
2067
2068
2069
2070
2071
2072
2073
2074
2075
2076
2077
2078
2079
2080
2081
2082
2083
2084
2085
2086
2087
2088
2089
2090
2091
2092
2093
2094
2095
2096
2097
2098
2099
2100
2101
2102
2103
2104
2105
2106
2107
2108
2109
2110
2111
2112
2113
2114
2115
2116
2117
2118
2119
2120
2121
2122
2123
2124
2125
2126
2127
2128
2129
2130
2131
2132
2133
2134
2135
2136
2137
2138
2139
2140
2141
2142
2143
2144
2145
2146
2147
2148
2149
2150
2151
2152
2153
2154
2155
2156
2157
2158
2159
2160
2161
2162
2163
2164
2165
2166
2167
2168
2169
2170
2171
2172
2173
2174
2175
2176
2177
2178
2179
2180
2181
2182
2183
2184
2185
2186
2187
2188
2189
2190
2191
2192
2193
2194
2195
2196
2197
2198
2199
2200
2201
2202
2203
2204
2205
2206
2207
2208
2209
2210
2211
2212
2213
2214
2215
2216
2217
2218
2219
2220
2221
2222
2223
2224
2225
2226
2227
2228
2229
2230
2231
2232
2233
2234
2235
2236
2237
2238
2239
2240
2241
2242
2243
2244
2245
2246
2247
2248
2249
2250
2251
2252
2253
2254
2255
2256
2257
2258
2259
2260
2261
2262
2263
2264
2265
2266
2267
2268
2269
2270
2271
2272
2273
2274
2275
2276
2277
2278
2279
2280
2281
2282
2283
2284
2285
2286
2287
2288
2289
2290
2291
2292
2293
2294
2295
2296
2297
2298
2299
2300
2301
2302
2303
2304
2305
2306
2307
2308
2309
2310
2311
2312
2313
2314
2315
2316
2317
2318
2319
2320
2321
2322
2323
2324
2325
2326
2327
2328
2329
2330
2331
2332
2333
2334
2335
2336
2337
2338
2339
2340
2341
2342
2343
/*
Copyright (C) 1996-1997 Id Software, Inc.

This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.

*/
// snd_main.c -- main control for any streaming sound output device

#include "quakedef.h"

#include "snd_main.h"
#include "snd_ogg.h"
#include "csprogs.h"
#include "cl_collision.h"
#ifdef CONFIG_CD
#include "cdaudio.h"
#endif


#define SND_MIN_SPEED 8000
#define SND_MAX_SPEED 192000
#define SND_MIN_WIDTH 1
#define SND_MAX_WIDTH 2
#define SND_MIN_CHANNELS 1
#define SND_MAX_CHANNELS 8
#if SND_LISTENERS != 8
#	error this data only supports up to 8 channel, update it!
#endif

speakerlayout_t snd_speakerlayout;

// Our speaker layouts are based on ALSA. They differ from those
// Win32 and Mac OS X APIs use when there's more than 4 channels.
// (rear left + rear right, and front center + LFE are swapped).
#define SND_SPEAKERLAYOUTS (sizeof(snd_speakerlayouts) / sizeof(snd_speakerlayouts[0]))
static const speakerlayout_t snd_speakerlayouts[] =
{
	{
		"surround71", 8,
		{
			{0, 45, 0.2f, 0.2f, 0.5f}, // front left
			{1, 315, 0.2f, 0.2f, 0.5f}, // front right
			{2, 135, 0.2f, 0.2f, 0.5f}, // rear left
			{3, 225, 0.2f, 0.2f, 0.5f}, // rear right
			{4, 0, 0.2f, 0.2f, 0.5f}, // front center
			{5, 0, 0, 0, 0}, // lfe (we don't have any good lfe sound sources and it would take some filtering work to generate them (and they'd probably still be wrong), so...  no lfe)
			{6, 90, 0.2f, 0.2f, 0.5f}, // side left
			{7, 180, 0.2f, 0.2f, 0.5f}, // side right
		}
	},
	{
		"surround51", 6,
		{
			{0, 45, 0.2f, 0.2f, 0.5f}, // front left
			{1, 315, 0.2f, 0.2f, 0.5f}, // front right
			{2, 135, 0.2f, 0.2f, 0.5f}, // rear left
			{3, 225, 0.2f, 0.2f, 0.5f}, // rear right
			{4, 0, 0.2f, 0.2f, 0.5f}, // front center
			{5, 0, 0, 0, 0}, // lfe (we don't have any good lfe sound sources and it would take some filtering work to generate them (and they'd probably still be wrong), so...  no lfe)
			{0, 0, 0, 0, 0},
			{0, 0, 0, 0, 0},
		}
	},
	{
		// these systems sometimes have a subwoofer as well, but it has no
		// channel of its own
		"surround40", 4,
		{
			{0, 45, 0.3f, 0.3f, 0.8f}, // front left
			{1, 315, 0.3f, 0.3f, 0.8f}, // front right
			{2, 135, 0.3f, 0.3f, 0.8f}, // rear left
			{3, 225, 0.3f, 0.3f, 0.8f}, // rear right
			{0, 0, 0, 0, 0},
			{0, 0, 0, 0, 0},
			{0, 0, 0, 0, 0},
			{0, 0, 0, 0, 0},
		}
	},
	{
		// these systems sometimes have a subwoofer as well, but it has no
		// channel of its own
		"stereo", 2,
		{
			{0, 90, 0.5f, 0.5f, 1}, // side left
			{1, 270, 0.5f, 0.5f, 1}, // side right
			{0, 0, 0, 0, 0},
			{0, 0, 0, 0, 0},
			{0, 0, 0, 0, 0},
			{0, 0, 0, 0, 0},
			{0, 0, 0, 0, 0},
			{0, 0, 0, 0, 0},
		}
	},
	{
		"mono", 1,
		{
			{0, 0, 0, 1, 1}, // center
			{0, 0, 0, 0, 0},
			{0, 0, 0, 0, 0},
			{0, 0, 0, 0, 0},
			{0, 0, 0, 0, 0},
			{0, 0, 0, 0, 0},
			{0, 0, 0, 0, 0},
			{0, 0, 0, 0, 0},
		}
	}
};


// =======================================================================
// Internal sound data & structures
// =======================================================================

channel_t channels[MAX_CHANNELS];
unsigned int total_channels;

snd_ringbuffer_t *snd_renderbuffer = NULL;
static unsigned int soundtime = 0;
static unsigned int oldpaintedtime = 0;
static unsigned int extrasoundtime = 0;
static double snd_starttime = 0.0;
qboolean snd_threaded = false;
qboolean snd_usethreadedmixing = false;

vec3_t listener_origin;
matrix4x4_t listener_basematrix;
static unsigned char *listener_pvs = NULL;
static int listener_pvsbytes = 0;
matrix4x4_t listener_matrix[SND_LISTENERS];
mempool_t *snd_mempool;

// Linked list of known sfx
static sfx_t *known_sfx = NULL;

static qboolean sound_spatialized = false;

qboolean simsound = false;

static qboolean recording_sound = false;

int snd_blocked = 0;
static int current_swapstereo = false;
static int current_channellayout = SND_CHANNELLAYOUT_AUTO;
static int current_channellayout_used = SND_CHANNELLAYOUT_AUTO;

static float spatialpower, spatialmin, spatialdiff, spatialoffset, spatialfactor;
typedef enum { SPATIAL_NONE, SPATIAL_LOG, SPATIAL_POW, SPATIAL_THRESH } spatialmethod_t;
spatialmethod_t spatialmethod;

// Cvars declared in sound.h (part of the sound API)
cvar_t bgmvolume = {CVAR_SAVE, "bgmvolume", "1", "volume of background music (such as CD music or replacement files such as sound/cdtracks/track002.ogg)"};
cvar_t mastervolume = {CVAR_SAVE, "mastervolume", "0.7", "master volume"};
cvar_t volume = {CVAR_SAVE, "volume", "0.7", "volume of sound effects"};
cvar_t snd_initialized = { CVAR_READONLY, "snd_initialized", "0", "indicates the sound subsystem is active"};
cvar_t snd_staticvolume = {CVAR_SAVE, "snd_staticvolume", "1", "volume of ambient sound effects (such as swampy sounds at the start of e1m2)"};
cvar_t snd_soundradius = {CVAR_SAVE, "snd_soundradius", "1200", "radius of weapon sounds and other standard sound effects (monster idle noises are half this radius and flickering light noises are one third of this radius)"};
cvar_t snd_attenuation_exponent = {CVAR_SAVE, "snd_attenuation_exponent", "1", "Exponent of (1-radius) in sound attenuation formula"};
cvar_t snd_attenuation_decibel = {CVAR_SAVE, "snd_attenuation_decibel", "0", "Decibel sound attenuation per sound radius distance"};
cvar_t snd_spatialization_min_radius = {CVAR_SAVE, "snd_spatialization_min_radius", "10000", "use minimum spatialization above to this radius"};
cvar_t snd_spatialization_max_radius = {CVAR_SAVE, "snd_spatialization_max_radius", "100", "use maximum spatialization below this radius"};
cvar_t snd_spatialization_min = {CVAR_SAVE, "snd_spatialization_min", "0.70", "minimum spatializazion of sounds"};
cvar_t snd_spatialization_max = {CVAR_SAVE, "snd_spatialization_max", "0.95", "maximum spatialization of sounds"};
cvar_t snd_spatialization_power = {CVAR_SAVE, "snd_spatialization_power", "0", "exponent of the spatialization falloff curve (0: logarithmic)"};
cvar_t snd_spatialization_control = {CVAR_SAVE, "snd_spatialization_control", "0", "enable spatialization control (headphone friendly mode)"};
cvar_t snd_spatialization_prologic = {CVAR_SAVE, "snd_spatialization_prologic", "0", "use dolby prologic (I, II or IIx) encoding (snd_channels must be 2)"};
cvar_t snd_spatialization_prologic_frontangle = {CVAR_SAVE, "snd_spatialization_prologic_frontangle", "30", "the angle between the front speakers and the center speaker"};
cvar_t snd_spatialization_occlusion = {CVAR_SAVE, "snd_spatialization_occlusion", "1", "enable occlusion testing on spatialized sounds, which simply quiets sounds that are blocked by the world; 1 enables PVS method, 2 enables LineOfSight method, 3 enables both"};

// Cvars declared in snd_main.h (shared with other snd_*.c files)
cvar_t _snd_mixahead = {CVAR_SAVE, "_snd_mixahead", "0.15", "how much sound to mix ahead of time"};
cvar_t snd_streaming = { CVAR_SAVE, "snd_streaming", "1", "enables keeping compressed ogg sound files compressed, decompressing them only as needed, otherwise they will be decompressed completely at load (may use a lot of memory); when set to 2, streaming is performed even if this would waste memory"};
cvar_t snd_streaming_length = { CVAR_SAVE, "snd_streaming_length", "1", "decompress sounds completely if they are less than this play time when snd_streaming is 1"};
cvar_t snd_swapstereo = {CVAR_SAVE, "snd_swapstereo", "0", "swaps left/right speakers for old ISA soundblaster cards"};
extern cvar_t v_flipped;
cvar_t snd_channellayout = {0, "snd_channellayout", "0", "channel layout. Can be 0 (auto - snd_restart needed), 1 (standard layout), or 2 (ALSA layout)"};
cvar_t snd_mutewhenidle = {CVAR_SAVE, "snd_mutewhenidle", "1", "whether to disable sound output when game window is inactive"};
cvar_t snd_maxchannelvolume = {CVAR_SAVE, "snd_maxchannelvolume", "10", "maximum volume of a single sound"};
cvar_t snd_softclip = {CVAR_SAVE, "snd_softclip", "0", "Use soft-clipping. Soft-clipping can make the sound more smooth if very high volume levels are used. Enable this option if the dynamic range of the loudspeakers is very low. WARNING: This feature creates distortion and should be considered a last resort."};
//cvar_t snd_softclip = {CVAR_SAVE, "snd_softclip", "0", "Use soft-clipping (when set to 2, use it even if output is floating point). Soft-clipping can make the sound more smooth if very high volume levels are used. Enable this option if the dynamic range of the loudspeakers is very low. WARNING: This feature creates distortion and should be considered a last resort."};
cvar_t snd_entchannel0volume = {CVAR_SAVE, "snd_entchannel0volume", "1", "volume multiplier of the auto-allocate entity channel of regular entities (DEPRECATED)"};
cvar_t snd_entchannel1volume = {CVAR_SAVE, "snd_entchannel1volume", "1", "volume multiplier of the 1st entity channel of regular entities (DEPRECATED)"};
cvar_t snd_entchannel2volume = {CVAR_SAVE, "snd_entchannel2volume", "1", "volume multiplier of the 2nd entity channel of regular entities (DEPRECATED)"};
cvar_t snd_entchannel3volume = {CVAR_SAVE, "snd_entchannel3volume", "1", "volume multiplier of the 3rd entity channel of regular entities (DEPRECATED)"};
cvar_t snd_entchannel4volume = {CVAR_SAVE, "snd_entchannel4volume", "1", "volume multiplier of the 4th entity channel of regular entities (DEPRECATED)"};
cvar_t snd_entchannel5volume = {CVAR_SAVE, "snd_entchannel5volume", "1", "volume multiplier of the 5th entity channel of regular entities (DEPRECATED)"};
cvar_t snd_entchannel6volume = {CVAR_SAVE, "snd_entchannel6volume", "1", "volume multiplier of the 6th entity channel of regular entities (DEPRECATED)"};
cvar_t snd_entchannel7volume = {CVAR_SAVE, "snd_entchannel7volume", "1", "volume multiplier of the 7th entity channel of regular entities (DEPRECATED)"};
cvar_t snd_playerchannel0volume = {CVAR_SAVE, "snd_playerchannel0volume", "1", "volume multiplier of the auto-allocate entity channel of player entities (DEPRECATED)"};
cvar_t snd_playerchannel1volume = {CVAR_SAVE, "snd_playerchannel1volume", "1", "volume multiplier of the 1st entity channel of player entities (DEPRECATED)"};
cvar_t snd_playerchannel2volume = {CVAR_SAVE, "snd_playerchannel2volume", "1", "volume multiplier of the 2nd entity channel of player entities (DEPRECATED)"};
cvar_t snd_playerchannel3volume = {CVAR_SAVE, "snd_playerchannel3volume", "1", "volume multiplier of the 3rd entity channel of player entities (DEPRECATED)"};
cvar_t snd_playerchannel4volume = {CVAR_SAVE, "snd_playerchannel4volume", "1", "volume multiplier of the 4th entity channel of player entities (DEPRECATED)"};
cvar_t snd_playerchannel5volume = {CVAR_SAVE, "snd_playerchannel5volume", "1", "volume multiplier of the 5th entity channel of player entities (DEPRECATED)"};
cvar_t snd_playerchannel6volume = {CVAR_SAVE, "snd_playerchannel6volume", "1", "volume multiplier of the 6th entity channel of player entities (DEPRECATED)"};
cvar_t snd_playerchannel7volume = {CVAR_SAVE, "snd_playerchannel7volume", "1", "volume multiplier of the 7th entity channel of player entities (DEPRECATED)"};
cvar_t snd_worldchannel0volume = {CVAR_SAVE, "snd_worldchannel0volume", "1", "volume multiplier of the auto-allocate entity channel of the world entity (DEPRECATED)"};
cvar_t snd_worldchannel1volume = {CVAR_SAVE, "snd_worldchannel1volume", "1", "volume multiplier of the 1st entity channel of the world entity (DEPRECATED)"};
cvar_t snd_worldchannel2volume = {CVAR_SAVE, "snd_worldchannel2volume", "1", "volume multiplier of the 2nd entity channel of the world entity (DEPRECATED)"};
cvar_t snd_worldchannel3volume = {CVAR_SAVE, "snd_worldchannel3volume", "1", "volume multiplier of the 3rd entity channel of the world entity (DEPRECATED)"};
cvar_t snd_worldchannel4volume = {CVAR_SAVE, "snd_worldchannel4volume", "1", "volume multiplier of the 4th entity channel of the world entity (DEPRECATED)"};
cvar_t snd_worldchannel5volume = {CVAR_SAVE, "snd_worldchannel5volume", "1", "volume multiplier of the 5th entity channel of the world entity (DEPRECATED)"};
cvar_t snd_worldchannel6volume = {CVAR_SAVE, "snd_worldchannel6volume", "1", "volume multiplier of the 6th entity channel of the world entity (DEPRECATED)"};
cvar_t snd_worldchannel7volume = {CVAR_SAVE, "snd_worldchannel7volume", "1", "volume multiplier of the 7th entity channel of the world entity (DEPRECATED)"};
cvar_t snd_csqcchannel0volume = {CVAR_SAVE, "snd_csqcchannel0volume", "1", "volume multiplier of the auto-allocate entity channel CSQC entities (DEPRECATED)"};
cvar_t snd_csqcchannel1volume = {CVAR_SAVE, "snd_csqcchannel1volume", "1", "volume multiplier of the 1st entity channel of CSQC entities (DEPRECATED)"};
cvar_t snd_csqcchannel2volume = {CVAR_SAVE, "snd_csqcchannel2volume", "1", "volume multiplier of the 2nd entity channel of CSQC entities (DEPRECATED)"};
cvar_t snd_csqcchannel3volume = {CVAR_SAVE, "snd_csqcchannel3volume", "1", "volume multiplier of the 3rd entity channel of CSQC entities (DEPRECATED)"};
cvar_t snd_csqcchannel4volume = {CVAR_SAVE, "snd_csqcchannel4volume", "1", "volume multiplier of the 4th entity channel of CSQC entities (DEPRECATED)"};
cvar_t snd_csqcchannel5volume = {CVAR_SAVE, "snd_csqcchannel5volume", "1", "volume multiplier of the 5th entity channel of CSQC entities (DEPRECATED)"};
cvar_t snd_csqcchannel6volume = {CVAR_SAVE, "snd_csqcchannel6volume", "1", "volume multiplier of the 6th entity channel of CSQC entities (DEPRECATED)"};
cvar_t snd_csqcchannel7volume = {CVAR_SAVE, "snd_csqcchannel7volume", "1", "volume multiplier of the 7th entity channel of CSQC entities (DEPRECATED)"};
cvar_t snd_channel0volume = {CVAR_SAVE, "snd_channel0volume", "1", "volume multiplier of the auto-allocate entity channel"};
cvar_t snd_channel1volume = {CVAR_SAVE, "snd_channel1volume", "1", "volume multiplier of the 1st entity channel"};
cvar_t snd_channel2volume = {CVAR_SAVE, "snd_channel2volume", "1", "volume multiplier of the 2nd entity channel"};
cvar_t snd_channel3volume = {CVAR_SAVE, "snd_channel3volume", "1", "volume multiplier of the 3rd entity channel"};
cvar_t snd_channel4volume = {CVAR_SAVE, "snd_channel4volume", "1", "volume multiplier of the 4th entity channel"};
cvar_t snd_channel5volume = {CVAR_SAVE, "snd_channel5volume", "1", "volume multiplier of the 5th entity channel"};
cvar_t snd_channel6volume = {CVAR_SAVE, "snd_channel6volume", "1", "volume multiplier of the 6th entity channel"};
cvar_t snd_channel7volume = {CVAR_SAVE, "snd_channel7volume", "1", "volume multiplier of the 7th entity channel"};

// Local cvars
static cvar_t nosound = {0, "nosound", "0", "disables sound"};
static cvar_t snd_precache = {0, "snd_precache", "1", "loads sounds before they are used"};
static cvar_t ambient_level = {0, "ambient_level", "0.3", "volume of environment noises (water and wind)"};
static cvar_t ambient_fade = {0, "ambient_fade", "100", "rate of volume fading when moving from one environment to another"};
static cvar_t snd_noextraupdate = {0, "snd_noextraupdate", "0", "disables extra sound mixer calls that are meant to reduce the chance of sound breakup at very low framerates"};
static cvar_t snd_show = {0, "snd_show", "0", "shows some statistics about sound mixing"};

// Default sound format is 48KHz, 16-bit, stereo
// (48KHz because a lot of onboard sound cards sucks at any other speed)
static cvar_t snd_speed = {CVAR_SAVE, "snd_speed", "48000", "sound output frequency, in hertz"};
static cvar_t snd_width = {CVAR_SAVE, "snd_width", "2", "sound output precision, in bytes (1 and 2 supported)"};
static cvar_t snd_channels = {CVAR_SAVE, "snd_channels", "2", "number of channels for the sound output (2 for stereo; up to 8 supported for 3D sound)"};

static cvar_t snd_startloopingsounds = {0, "snd_startloopingsounds", "1", "whether to start sounds that would loop (you want this to be 1); existing sounds are not affected"};
static cvar_t snd_startnonloopingsounds = {0, "snd_startnonloopingsounds", "1", "whether to start sounds that would not loop (you want this to be 1); existing sounds are not affected"};

// randomization
static cvar_t snd_identicalsoundrandomization_time = {0, "snd_identicalsoundrandomization_time", "0.1", "how much seconds to randomly skip (positive) or delay (negative) sounds when multiple identical sounds are started on the same frame"};
static cvar_t snd_identicalsoundrandomization_tics = {0, "snd_identicalsoundrandomization_tics", "0", "if nonzero, how many tics to limit sound randomization as defined by snd_identicalsoundrandomization_time"};

// Ambient sounds
static sfx_t* ambient_sfxs [2] = { NULL, NULL };
static const char* ambient_names [2] = { "sound/ambience/water1.wav", "sound/ambience/wind2.wav" };


// ====================================================================
// Functions
// ====================================================================

void S_FreeSfx (sfx_t *sfx, qboolean force);

static void S_Play_Common (float fvol, float attenuation)
{
	int i, ch_ind;
	char name [MAX_QPATH];
	sfx_t *sfx;

	i = 1;
	while (i < Cmd_Argc ())
	{
		// Get the name, and appends ".wav" as an extension if there's none
		strlcpy (name, Cmd_Argv (i), sizeof (name));
		if (!strrchr (name, '.'))
			strlcat (name, ".wav", sizeof (name));
		i++;

		// If we need to get the volume from the command line
		if (fvol == -1.0f)
		{
			fvol = atof (Cmd_Argv (i));
			i++;
		}

		sfx = S_PrecacheSound (name, true, true);
		if (sfx)
		{
			ch_ind = S_StartSound (-1, 0, sfx, listener_origin, fvol, attenuation);

			// Free the sfx if the file didn't exist
			if (!sfx->fetcher)
				S_FreeSfx (sfx, false);
			else
				channels[ch_ind].flags |= CHANNELFLAG_LOCALSOUND;
		}
	}
}

static void S_Play_f(void)
{
	S_Play_Common (1.0f, 1.0f);
}

static void S_Play2_f(void)
{
	S_Play_Common (1.0f, 0.0f);
}

static void S_PlayVol_f(void)
{
	S_Play_Common (-1.0f, 0.0f);
}

static void S_SoundList_f (void)
{
	unsigned int i;
	sfx_t *sfx;
	unsigned int total;

	total = 0;
	for (sfx = known_sfx, i = 0; sfx != NULL; sfx = sfx->next, i++)
	{
		if (sfx->fetcher != NULL)
		{
			unsigned int size;

			size = (unsigned int)sfx->memsize;
			Con_Printf ("%c%c%c(%5iHz %2db %6s) %8i : %s\n",
						(sfx->loopstart < sfx->total_length) ? 'L' : ' ',
						(sfx->flags & SFXFLAG_STREAMED) ? 'S' : ' ',
						(sfx->flags & SFXFLAG_MENUSOUND) ? 'P' : ' ',
						sfx->format.speed,
						sfx->format.width * 8,
						(sfx->format.channels == 1) ? "mono" : "stereo",
						size,
						sfx->name);
			total += size;
		}
		else
			Con_Printf ("    (  unknown  ) unloaded : %s\n", sfx->name);
	}
	Con_Printf("Total resident: %i\n", total);
}


static void S_SoundInfo_f(void)
{
	if (snd_renderbuffer == NULL)
	{
		Con_Print("sound system not started\n");
		return;
	}

	Con_Printf("%5d speakers\n", snd_renderbuffer->format.channels);
	Con_Printf("%5d frames\n", snd_renderbuffer->maxframes);
	Con_Printf("%5d samplebits\n", snd_renderbuffer->format.width * 8);
	Con_Printf("%5d speed\n", snd_renderbuffer->format.speed);
	Con_Printf("%5u total_channels\n", total_channels);
}


int S_GetSoundRate(void)
{
	return snd_renderbuffer ? snd_renderbuffer->format.speed : 0;
}

int S_GetSoundChannels(void)
{
	return snd_renderbuffer ? snd_renderbuffer->format.channels : 0;
}


static qboolean S_ChooseCheaperFormat (snd_format_t* format, qboolean fixed_speed, qboolean fixed_width, qboolean fixed_channels)
{
	static const snd_format_t thresholds [] =
	{
		// speed			width			channels
		{ SND_MIN_SPEED,	SND_MIN_WIDTH,	SND_MIN_CHANNELS },
		{ 11025,			1,				2 },
		{ 22050,			2,				2 },
		{ 44100,			2,				2 },
		{ 48000,			2,				6 },
		{ 96000,			2,				6 },
		{ SND_MAX_SPEED,	SND_MAX_WIDTH,	SND_MAX_CHANNELS },
	};
	const unsigned int nb_thresholds = sizeof(thresholds) / sizeof(thresholds[0]);
	unsigned int speed_level, width_level, channels_level;

	// If we have reached the minimum values, there's nothing more we can do
	if ((format->speed == thresholds[0].speed || fixed_speed) &&
		(format->width == thresholds[0].width || fixed_width) &&
		(format->channels == thresholds[0].channels || fixed_channels))
		return false;

	// Check the min and max values
	#define CHECK_BOUNDARIES(param)								\
	if (format->param < thresholds[0].param)					\
	{															\
		format->param = thresholds[0].param;					\
		return true;											\
	}															\
	if (format->param > thresholds[nb_thresholds - 1].param)	\
	{															\
		format->param = thresholds[nb_thresholds - 1].param;	\
		return true;											\
	}
	CHECK_BOUNDARIES(speed);
	CHECK_BOUNDARIES(width);
	CHECK_BOUNDARIES(channels);
	#undef CHECK_BOUNDARIES

	// Find the level of each parameter
	#define FIND_LEVEL(param)									\
	param##_level = 0;											\
	while (param##_level < nb_thresholds - 1)					\
	{															\
		if (format->param <= thresholds[param##_level].param)	\
			break;												\
																\
		param##_level++;										\
	}
	FIND_LEVEL(speed);
	FIND_LEVEL(width);
	FIND_LEVEL(channels);
	#undef FIND_LEVEL

	// Decrease the parameter with the highest level to the previous level
	if (channels_level >= speed_level && channels_level >= width_level && !fixed_channels)
	{
		format->channels = thresholds[channels_level - 1].channels;
		return true;
	}
	if (speed_level >= width_level && !fixed_speed)
	{
		format->speed = thresholds[speed_level - 1].speed;
		return true;
	}

	format->width = thresholds[width_level - 1].width;
	return true;
}


#define SWAP_LISTENERS(l1, l2, tmpl) { tmpl = (l1); (l1) = (l2); (l2) = tmpl; }

static void S_SetChannelLayout (void)
{
	unsigned int i;
	listener_t swaplistener;
	listener_t *listeners;
	int layout;

	for (i = 0; i < SND_SPEAKERLAYOUTS; i++)
		if (snd_speakerlayouts[i].channels == snd_renderbuffer->format.channels)
			break;
	if (i >= SND_SPEAKERLAYOUTS)
	{
		Con_Printf("S_SetChannelLayout: can't find the speaker layout for %hu channels. Defaulting to mono output\n",
				   snd_renderbuffer->format.channels);
		i = SND_SPEAKERLAYOUTS - 1;
	}

	snd_speakerlayout = snd_speakerlayouts[i];
	listeners = snd_speakerlayout.listeners;

	// Swap the left and right channels if snd_swapstereo is set
	if (boolxor(snd_swapstereo.integer, v_flipped.integer))
	{
		switch (snd_speakerlayout.channels)
		{
			case 8:
				SWAP_LISTENERS(listeners[6], listeners[7], swaplistener);
				// no break
			case 4:
			case 6:
				SWAP_LISTENERS(listeners[2], listeners[3], swaplistener);
				// no break
			case 2:
				SWAP_LISTENERS(listeners[0], listeners[1], swaplistener);
				break;

			default:
			case 1:
				// Nothing to do
				break;
		}
	}

	// Sanity check
	if (snd_channellayout.integer < SND_CHANNELLAYOUT_AUTO ||
		snd_channellayout.integer > SND_CHANNELLAYOUT_ALSA)
		Cvar_SetValueQuick (&snd_channellayout, SND_CHANNELLAYOUT_STANDARD);

	if (snd_channellayout.integer == SND_CHANNELLAYOUT_AUTO)
	{
		// If we're in the sound engine initialization
		if (current_channellayout_used == SND_CHANNELLAYOUT_AUTO)
		{
			layout = SND_CHANNELLAYOUT_STANDARD;
			Cvar_SetValueQuick (&snd_channellayout, layout);
		}
		else
			layout = current_channellayout_used;
	}
	else
		layout = snd_channellayout.integer;

	// Convert our layout (= ALSA) to the standard layout if necessary
	if (snd_speakerlayout.channels == 6 || snd_speakerlayout.channels == 8)
	{
		if (layout == SND_CHANNELLAYOUT_STANDARD)
		{
			SWAP_LISTENERS(listeners[2], listeners[4], swaplistener);
			SWAP_LISTENERS(listeners[3], listeners[5], swaplistener);
		}

		Con_Printf("S_SetChannelLayout: using %s speaker layout for 3D sound\n",
				   (layout == SND_CHANNELLAYOUT_ALSA) ? "ALSA" : "standard");
	}

	current_swapstereo = boolxor(snd_swapstereo.integer, v_flipped.integer);
	current_channellayout = snd_channellayout.integer;
	current_channellayout_used = layout;
}


void S_Startup (void)
{
	qboolean fixed_speed, fixed_width, fixed_channels;
	snd_format_t chosen_fmt;
	static snd_format_t prev_render_format = {0, 0, 0};
	char* env;
#if _MSC_VER >= 1400
	size_t envlen;
#endif
	int i;

	if (!snd_initialized.integer)
		return;

	fixed_speed = false;
	fixed_width = false;
	fixed_channels = false;

	// Get the starting sound format from the cvars
	chosen_fmt.speed = snd_speed.integer;
	chosen_fmt.width = snd_width.integer;
	chosen_fmt.channels = snd_channels.integer;

	// Check the environment variables to see if the player wants a particular sound format
#if _MSC_VER >= 1400
	_dupenv_s(&env, &envlen, "QUAKE_SOUND_CHANNELS");
#else
	env = getenv("QUAKE_SOUND_CHANNELS");
#endif
	if (env != NULL)
	{
		chosen_fmt.channels = atoi (env);
#if _MSC_VER >= 1400
		free(env);
#endif
		fixed_channels = true;
	}
#if _MSC_VER >= 1400
	_dupenv_s(&env, &envlen, "QUAKE_SOUND_SPEED");
#else
	env = getenv("QUAKE_SOUND_SPEED");
#endif
	if (env != NULL)
	{
		chosen_fmt.speed = atoi (env);
#if _MSC_VER >= 1400
		free(env);
#endif
		fixed_speed = true;
	}
#if _MSC_VER >= 1400
	_dupenv_s(&env, &envlen, "QUAKE_SOUND_SAMPLEBITS");
#else
	env = getenv("QUAKE_SOUND_SAMPLEBITS");
#endif
	if (env != NULL)
	{
		chosen_fmt.width = atoi (env) / 8;
#if _MSC_VER >= 1400
		free(env);
#endif
		fixed_width = true;
	}

	// Parse the command line to see if the player wants a particular sound format
// COMMANDLINEOPTION: Sound: -sndquad sets sound output to 4 channel surround
	if (COM_CheckParm ("-sndquad") != 0)
	{
		chosen_fmt.channels = 4;
		fixed_channels = true;
	}
// COMMANDLINEOPTION: Sound: -sndstereo sets sound output to stereo
	else if (COM_CheckParm ("-sndstereo") != 0)
	{
		chosen_fmt.channels = 2;
		fixed_channels = true;
	}
// COMMANDLINEOPTION: Sound: -sndmono sets sound output to mono
	else if (COM_CheckParm ("-sndmono") != 0)
	{
		chosen_fmt.channels = 1;
		fixed_channels = true;
	}
// COMMANDLINEOPTION: Sound: -sndspeed <hz> chooses sound output rate (supported values are 48000, 44100, 32000, 24000, 22050, 16000, 11025 (quake), 8000)
	i = COM_CheckParm ("-sndspeed");
	if (0 < i && i < com_argc - 1)
	{
		chosen_fmt.speed = atoi (com_argv[i + 1]);
		fixed_speed = true;
	}
// COMMANDLINEOPTION: Sound: -sndbits <bits> chooses 8 bit or 16 bit sound output
	i = COM_CheckParm ("-sndbits");
	if (0 < i && i < com_argc - 1)
	{
		chosen_fmt.width = atoi (com_argv[i + 1]) / 8;
		fixed_width = true;
	}

#if 0
	// LordHavoc: now you can with the resampler...
	// You can't change sound speed after start time (not yet supported)
	if (prev_render_format.speed != 0)
	{
		fixed_speed = true;
		if (chosen_fmt.speed != prev_render_format.speed)
		{
			Con_Printf("S_Startup: sound speed has changed! This is NOT supported yet. Falling back to previous speed (%u Hz)\n",
					   prev_render_format.speed);
			chosen_fmt.speed = prev_render_format.speed;
		}
	}
#endif

	// Sanity checks
	if (chosen_fmt.speed < SND_MIN_SPEED)
	{
		chosen_fmt.speed = SND_MIN_SPEED;
		fixed_speed = false;
	}
	else if (chosen_fmt.speed > SND_MAX_SPEED)
	{
		chosen_fmt.speed = SND_MAX_SPEED;
		fixed_speed = false;
	}

	if (chosen_fmt.width < SND_MIN_WIDTH)
	{
		chosen_fmt.width = SND_MIN_WIDTH;
		fixed_width = false;
	}
	else if (chosen_fmt.width > SND_MAX_WIDTH)
	{
		chosen_fmt.width = SND_MAX_WIDTH;
		fixed_width = false;
	}

	if (chosen_fmt.channels < SND_MIN_CHANNELS)
	{
		chosen_fmt.channels = SND_MIN_CHANNELS;
		fixed_channels = false;
	}
	else if (chosen_fmt.channels > SND_MAX_CHANNELS)
	{
		chosen_fmt.channels = SND_MAX_CHANNELS;
		fixed_channels = false;
	}

	// create the sound buffer used for sumitting the samples to the plaform-dependent module
	if (!simsound)
	{
		snd_format_t suggest_fmt;
		qboolean accepted;

		accepted = false;
		do
		{
			Con_Printf("S_Startup: initializing sound output format: %dHz, %d bit, %d channels...\n",
						chosen_fmt.speed, chosen_fmt.width * 8,
						chosen_fmt.channels);

			memset(&suggest_fmt, 0, sizeof(suggest_fmt));
			accepted = SndSys_Init(&chosen_fmt, &suggest_fmt);

			if (!accepted)
			{
				Con_Printf("S_Startup: sound output initialization FAILED\n");

				// If the module is suggesting another one
				if (suggest_fmt.speed != 0)
				{
					memcpy(&chosen_fmt, &suggest_fmt, sizeof(chosen_fmt));
					Con_Printf ("           Driver has suggested %dHz, %d bit, %d channels. Retrying...\n",
								suggest_fmt.speed, suggest_fmt.width * 8,
								suggest_fmt.channels);
				}
				// Else, try to find a less resource-demanding format
				else if (!S_ChooseCheaperFormat (&chosen_fmt, fixed_speed, fixed_width, fixed_channels))
					break;
			}
		} while (!accepted);

		// If we haven't found a suitable format
		if (!accepted)
		{
			Con_Print("S_Startup: SndSys_Init failed.\n");
			sound_spatialized = false;
			return;
		}
	}
	else
	{
		snd_renderbuffer = Snd_CreateRingBuffer(&chosen_fmt, 0, NULL);
		Con_Print ("S_Startup: simulating sound output\n");
	}

	memcpy(&prev_render_format, &snd_renderbuffer->format, sizeof(prev_render_format));
	Con_Printf("Sound format: %dHz, %d channels, %d bits per sample\n",
			   chosen_fmt.speed, chosen_fmt.channels, chosen_fmt.width * 8);

	// Update the cvars
	if (snd_speed.integer != (int)chosen_fmt.speed)
		Cvar_SetValueQuick(&snd_speed, chosen_fmt.speed);
	if (snd_width.integer != chosen_fmt.width)
		Cvar_SetValueQuick(&snd_width, chosen_fmt.width);
	if (snd_channels.integer != chosen_fmt.channels)
		Cvar_SetValueQuick(&snd_channels, chosen_fmt.channels);

	current_channellayout_used = SND_CHANNELLAYOUT_AUTO;
	S_SetChannelLayout();

	snd_starttime = realtime;

	// If the sound module has already run, add an extra time to make sure
	// the sound time doesn't decrease, to not confuse playing SFXs
	if (oldpaintedtime != 0)
	{
		// The extra time must be a multiple of the render buffer size
		// to avoid modifying the current position in the buffer,
		// some modules write directly to a shared (DMA) buffer
		extrasoundtime = oldpaintedtime + snd_renderbuffer->maxframes - 1;
		extrasoundtime -= extrasoundtime % snd_renderbuffer->maxframes;
		Con_Printf("S_Startup: extra sound time = %u\n", extrasoundtime);

		soundtime = extrasoundtime;
	}
	else
		extrasoundtime = 0;
	snd_renderbuffer->startframe = soundtime;
	snd_renderbuffer->endframe = soundtime;
	recording_sound = false;
}

void S_Shutdown(void)
{
	if (snd_renderbuffer == NULL)
		return;

	oldpaintedtime = snd_renderbuffer->endframe;

	if (simsound)
	{
		Mem_Free(snd_renderbuffer->ring);
		Mem_Free(snd_renderbuffer);
		snd_renderbuffer = NULL;
	}
	else
		SndSys_Shutdown();

	sound_spatialized = false;
}

static void S_Restart_f(void)
{
	// NOTE: we can't free all sounds if we are running a map (this frees sfx_t that are still referenced by precaches)
	// So, refuse to do this if we are connected.
	if(cls.state == ca_connected)
	{
		Con_Printf("snd_restart would wreak havoc if you do that while connected!\n");
		return;
	}

	S_Shutdown();
	S_Startup();
}

/*
================
S_Init
================
*/
void S_Init(void)
{
	Cvar_RegisterVariable(&volume);
	Cvar_RegisterVariable(&bgmvolume);
	Cvar_RegisterVariable(&mastervolume);
	Cvar_RegisterVariable(&snd_staticvolume);
	Cvar_RegisterVariable(&snd_entchannel0volume);
	Cvar_RegisterVariable(&snd_entchannel1volume);
	Cvar_RegisterVariable(&snd_entchannel2volume);
	Cvar_RegisterVariable(&snd_entchannel3volume);
	Cvar_RegisterVariable(&snd_entchannel4volume);
	Cvar_RegisterVariable(&snd_entchannel5volume);
	Cvar_RegisterVariable(&snd_entchannel6volume);
	Cvar_RegisterVariable(&snd_entchannel7volume);
	Cvar_RegisterVariable(&snd_worldchannel0volume);
	Cvar_RegisterVariable(&snd_worldchannel1volume);
	Cvar_RegisterVariable(&snd_worldchannel2volume);
	Cvar_RegisterVariable(&snd_worldchannel3volume);
	Cvar_RegisterVariable(&snd_worldchannel4volume);
	Cvar_RegisterVariable(&snd_worldchannel5volume);
	Cvar_RegisterVariable(&snd_worldchannel6volume);
	Cvar_RegisterVariable(&snd_worldchannel7volume);
	Cvar_RegisterVariable(&snd_playerchannel0volume);
	Cvar_RegisterVariable(&snd_playerchannel1volume);
	Cvar_RegisterVariable(&snd_playerchannel2volume);
	Cvar_RegisterVariable(&snd_playerchannel3volume);
	Cvar_RegisterVariable(&snd_playerchannel4volume);
	Cvar_RegisterVariable(&snd_playerchannel5volume);
	Cvar_RegisterVariable(&snd_playerchannel6volume);
	Cvar_RegisterVariable(&snd_playerchannel7volume);
	Cvar_RegisterVariable(&snd_csqcchannel0volume);
	Cvar_RegisterVariable(&snd_csqcchannel1volume);
	Cvar_RegisterVariable(&snd_csqcchannel2volume);
	Cvar_RegisterVariable(&snd_csqcchannel3volume);
	Cvar_RegisterVariable(&snd_csqcchannel4volume);
	Cvar_RegisterVariable(&snd_csqcchannel5volume);
	Cvar_RegisterVariable(&snd_csqcchannel6volume);
	Cvar_RegisterVariable(&snd_csqcchannel7volume);
	Cvar_RegisterVariable(&snd_channel0volume);
	Cvar_RegisterVariable(&snd_channel1volume);
	Cvar_RegisterVariable(&snd_channel2volume);
	Cvar_RegisterVariable(&snd_channel3volume);
	Cvar_RegisterVariable(&snd_channel4volume);
	Cvar_RegisterVariable(&snd_channel5volume);
	Cvar_RegisterVariable(&snd_channel6volume);
	Cvar_RegisterVariable(&snd_channel7volume);

	Cvar_RegisterVariable(&snd_attenuation_exponent);
	Cvar_RegisterVariable(&snd_attenuation_decibel);

	Cvar_RegisterVariable(&snd_spatialization_min_radius);
	Cvar_RegisterVariable(&snd_spatialization_max_radius);
	Cvar_RegisterVariable(&snd_spatialization_min);
	Cvar_RegisterVariable(&snd_spatialization_max);
	Cvar_RegisterVariable(&snd_spatialization_power);
	Cvar_RegisterVariable(&snd_spatialization_control);
	Cvar_RegisterVariable(&snd_spatialization_occlusion);
	Cvar_RegisterVariable(&snd_spatialization_prologic);
	Cvar_RegisterVariable(&snd_spatialization_prologic_frontangle);

	Cvar_RegisterVariable(&snd_speed);
	Cvar_RegisterVariable(&snd_width);
	Cvar_RegisterVariable(&snd_channels);
	Cvar_RegisterVariable(&snd_mutewhenidle);
	Cvar_RegisterVariable(&snd_maxchannelvolume);
	Cvar_RegisterVariable(&snd_softclip);

	Cvar_RegisterVariable(&snd_startloopingsounds);
	Cvar_RegisterVariable(&snd_startnonloopingsounds);

	Cvar_RegisterVariable(&snd_identicalsoundrandomization_time);
	Cvar_RegisterVariable(&snd_identicalsoundrandomization_tics);

// COMMANDLINEOPTION: Sound: -nosound disables sound (including CD audio)
	if (COM_CheckParm("-nosound"))
	{
		// dummy out Play and Play2 because mods stuffcmd that
		Cmd_AddCommand("play", Host_NoOperation_f, "does nothing because -nosound was specified");
		Cmd_AddCommand("play2", Host_NoOperation_f, "does nothing because -nosound was specified");
		return;
	}

	snd_mempool = Mem_AllocPool("sound", 0, NULL);

// COMMANDLINEOPTION: Sound: -simsound runs sound mixing but with no output
	if (COM_CheckParm("-simsound"))
		simsound = true;

	Cmd_AddCommand("play", S_Play_f, "play a sound at your current location (not heard by anyone else)");
	Cmd_AddCommand("play2", S_Play2_f, "play a sound globally throughout the level (not heard by anyone else)");
	Cmd_AddCommand("playvol", S_PlayVol_f, "play a sound at the specified volume level at your current location (not heard by anyone else)");
	Cmd_AddCommand("stopsound", S_StopAllSounds, "silence");
	Cmd_AddCommand("soundlist", S_SoundList_f, "list loaded sounds");
	Cmd_AddCommand("soundinfo", S_SoundInfo_f, "print sound system information (such as channels and speed)");
	Cmd_AddCommand("snd_restart", S_Restart_f, "restart sound system");
	Cmd_AddCommand("snd_unloadallsounds", S_UnloadAllSounds_f, "unload all sound files");

	Cvar_RegisterVariable(&nosound);
	Cvar_RegisterVariable(&snd_precache);
	Cvar_RegisterVariable(&snd_initialized);
	Cvar_RegisterVariable(&snd_streaming);
	Cvar_RegisterVariable(&snd_streaming_length);
	Cvar_RegisterVariable(&ambient_level);
	Cvar_RegisterVariable(&ambient_fade);
	Cvar_RegisterVariable(&snd_noextraupdate);
	Cvar_RegisterVariable(&snd_show);
	Cvar_RegisterVariable(&_snd_mixahead);
	Cvar_RegisterVariable(&snd_swapstereo); // for people with backwards sound wiring
	Cvar_RegisterVariable(&snd_channellayout);
	Cvar_RegisterVariable(&snd_soundradius);

	Cvar_SetValueQuick(&snd_initialized, true);

	known_sfx = NULL;

	total_channels = MAX_DYNAMIC_CHANNELS + NUM_AMBIENTS;	// no statics
	memset(channels, 0, MAX_CHANNELS * sizeof(channel_t));

	OGG_OpenLibrary ();
}


/*
================
S_Terminate

Shutdown and free all resources
================
*/
void S_Terminate (void)
{
	S_Shutdown ();
	OGG_CloseLibrary ();

	// Free all SFXs
	while (known_sfx != NULL)
		S_FreeSfx (known_sfx, true);

	Cvar_SetValueQuick (&snd_initialized, false);
	Mem_FreePool (&snd_mempool);
}


/*
==================
S_UnloadAllSounds_f
==================
*/
void S_UnloadAllSounds_f (void)
{
	int i;

	// NOTE: we can't free all sounds if we are running a map (this frees sfx_t that are still referenced by precaches)
	// So, refuse to do this if we are connected.
	if(cls.state == ca_connected)
	{
		Con_Printf("snd_unloadallsounds would wreak havoc if you do that while connected!\n");
		return;
	}

	// stop any active sounds
	S_StopAllSounds();

	// because the ambient sounds will be freed, clear the pointers
	for (i = 0;i < (int)sizeof (ambient_sfxs) / (int)sizeof (ambient_sfxs[0]);i++)
		ambient_sfxs[i] = NULL;

	// now free all sounds
	while (known_sfx != NULL)
		S_FreeSfx (known_sfx, true);
}


/*
==================
S_FindName
==================
*/
sfx_t changevolume_sfx = {""};
sfx_t *S_FindName (const char *name)
{
	sfx_t *sfx;

	if (!snd_initialized.integer)
		return NULL;

	if(!strcmp(name, changevolume_sfx.name))
		return &changevolume_sfx;

	if (strlen (name) >= sizeof (sfx->name))
	{
		Con_Printf ("S_FindName: sound name too long (%s)\n", name);
		return NULL;
	}

	// Look for this sound in the list of known sfx
	// TODO: hash table search?
	for (sfx = known_sfx; sfx != NULL; sfx = sfx->next)
		if(!strcmp (sfx->name, name))
			return sfx;

	// check for # in the beginning, try lookup by soundindex
	if (name[0] == '#' && name[1])
	{
		int soundindex = atoi(name + 1);
		if (soundindex > 0 && soundindex < MAX_SOUNDS)
			if (cl.sound_precache[soundindex]->name[0])
				return cl.sound_precache[soundindex];
	}

	// Add a sfx_t struct for this sound
	sfx = (sfx_t *)Mem_Alloc (snd_mempool, sizeof (*sfx));
	memset (sfx, 0, sizeof(*sfx));
	strlcpy (sfx->name, name, sizeof (sfx->name));
	sfx->memsize = sizeof(*sfx);
	sfx->next = known_sfx;
	known_sfx = sfx;

	return sfx;
}


/*
==================
S_FreeSfx
==================
*/
void S_FreeSfx (sfx_t *sfx, qboolean force)
{
	unsigned int i;

	// Do not free a precached sound during purge
	if (!force && (sfx->flags & (SFXFLAG_LEVELSOUND | SFXFLAG_MENUSOUND)))
		return;

	if (developer_loading.integer)
		Con_Printf ("unloading sound %s\n", sfx->name);

	// Remove it from the list of known sfx
	if (sfx == known_sfx)
		known_sfx = known_sfx->next;
	else
	{
		sfx_t *prev_sfx;

		for (prev_sfx = known_sfx; prev_sfx != NULL; prev_sfx = prev_sfx->next)
			if (prev_sfx->next == sfx)
			{
				prev_sfx->next = sfx->next;
				break;
			}
		if (prev_sfx == NULL)
		{
			Con_Printf ("S_FreeSfx: Can't find SFX %s in the list!\n", sfx->name);
			return;
		}
	}

	// Stop all channels using this sfx
	for (i = 0; i < total_channels; i++)
	{
		if (channels[i].sfx == sfx)
		{
			Con_Printf("S_FreeSfx: stopping channel %i for sfx \"%s\"\n", i, sfx->name);
			S_StopChannel (i, true, false);
		}
	}

	// Free it
	if (sfx->fetcher != NULL && sfx->fetcher->freesfx != NULL)
		sfx->fetcher->freesfx(sfx);
	Mem_Free (sfx);
}


/*
==================
S_ClearUsed
==================
*/
void S_ClearUsed (void)
{
	sfx_t *sfx;
//	sfx_t *sfxnext;
	unsigned int i;

	// Start the ambient sounds and make them loop
	for (i = 0; i < sizeof (ambient_sfxs) / sizeof (ambient_sfxs[0]); i++)
	{
		// Precache it if it's not done (and pass false for levelsound because these are permanent)
		if (ambient_sfxs[i] == NULL)
			ambient_sfxs[i] = S_PrecacheSound (ambient_names[i], false, false);
		if (ambient_sfxs[i] != NULL)
		{
			channels[i].sfx = ambient_sfxs[i];
			channels[i].sfx->flags |= SFXFLAG_MENUSOUND;
			channels[i].flags |= CHANNELFLAG_FORCELOOP;
			channels[i].basevolume = 0.0f;
			channels[i].basespeed = channels[i].mixspeed = 1.0f;
		}
	}

	// Clear SFXFLAG_LEVELSOUND flag so that sounds not precached this level will be purged
	for (sfx = known_sfx; sfx != NULL; sfx = sfx->next)
		sfx->flags &= ~SFXFLAG_LEVELSOUND;
}

/*
==================
S_PurgeUnused
==================
*/
void S_PurgeUnused(void)
{
	sfx_t *sfx;
	sfx_t *sfxnext;

	// Free all not-precached per-level sfx
	for (sfx = known_sfx;sfx;sfx = sfxnext)
	{
		sfxnext = sfx->next;
		if (!(sfx->flags & (SFXFLAG_LEVELSOUND | SFXFLAG_MENUSOUND)))
			S_FreeSfx (sfx, false);
	}
}


/*
==================
S_PrecacheSound
==================
*/
sfx_t *S_PrecacheSound (const char *name, qboolean complain, qboolean levelsound)
{
	sfx_t *sfx;

	if (!snd_initialized.integer)
		return NULL;

	if (name == NULL || name[0] == 0)
		return NULL;

	sfx = S_FindName (name);

	if (sfx == NULL)
		return NULL;

	// clear the FILEMISSING flag so that S_LoadSound will try again on a
	// previously missing file
	sfx->flags &= ~ SFXFLAG_FILEMISSING;

	// set a flag to indicate this has been precached for this level or permanently
	if (levelsound)
		sfx->flags |= SFXFLAG_LEVELSOUND;
	else
		sfx->flags |= SFXFLAG_MENUSOUND;

	if (!nosound.integer && snd_precache.integer)
		S_LoadSound(sfx, complain);

	return sfx;
}

/*
==================
S_SoundLength
==================
*/

float S_SoundLength(const char *name)
{
	sfx_t *sfx;

	if (!snd_initialized.integer)
		return -1;
	if (name == NULL || name[0] == 0)
		return -1;

	sfx = S_FindName(name);
	if (sfx == NULL)
		return -1;
	return sfx->total_length / (float) S_GetSoundRate();
}

/*
==================
S_IsSoundPrecached
==================
*/
qboolean S_IsSoundPrecached (const sfx_t *sfx)
{
	return (sfx != NULL && sfx->fetcher != NULL) || (sfx == &changevolume_sfx);
}

/*
==================
S_BlockSound
==================
*/
void S_BlockSound (void)
{
	snd_blocked++;
}


/*
==================
S_UnblockSound
==================
*/
void S_UnblockSound (void)
{
	snd_blocked--;
}


/*
=================
SND_PickChannel

Picks a channel based on priorities, empty slots, number of channels
=================
*/
static channel_t *SND_PickChannel(int entnum, int entchannel)
{
	int ch_idx;
	int first_to_die;
	int first_life_left, life_left;
	channel_t* ch;
	sfx_t *sfx; // use this instead of ch->sfx->, because that is volatile.

// Check for replacement sound, or find the best one to replace
	first_to_die = -1;
	first_life_left = 0x7fffffff;

	// entity channels try to replace the existing sound on the channel
	// channels <= 0 are autochannels
	if (IS_CHAN_SINGLE(entchannel))
	{
		for (ch_idx=NUM_AMBIENTS ; ch_idx < NUM_AMBIENTS + MAX_DYNAMIC_CHANNELS ; ch_idx++)
		{
			ch = &channels[ch_idx];
			if (ch->entnum == entnum && ch->entchannel == entchannel)
			{
				// always override sound from same entity
				S_StopChannel (ch_idx, true, false);
				return &channels[ch_idx];
			}
		}
	}

	// there was no channel to override, so look for the first empty one
	for (ch_idx=NUM_AMBIENTS ; ch_idx < NUM_AMBIENTS + MAX_DYNAMIC_CHANNELS ; ch_idx++)
	{
		ch = &channels[ch_idx];
		sfx = ch->sfx; // fetch the volatile variable
		if (!sfx)
		{
			// no sound on this channel
			first_to_die = ch_idx;
			goto emptychan_found;
		}

		// don't let monster sounds override player sounds
		if ((ch->entnum == cl.viewentity || ch->entnum == CL_VM_GetViewEntity()) && !(entnum == cl.viewentity || entnum == CL_VM_GetViewEntity()))
			continue;

		// don't override looped sounds
		if ((ch->flags & CHANNELFLAG_FORCELOOP) || sfx->loopstart < sfx->total_length)
			continue;
		life_left = (int)((double)sfx->total_length - ch->position);

		if (life_left < first_life_left)
		{
			first_life_left = life_left;
			first_to_die = ch_idx;
		}
	}

	if (first_to_die == -1)
		return NULL;
	
	S_StopChannel (first_to_die, true, false);

emptychan_found:
	return &channels[first_to_die];
}

/*
=================
SND_Spatialize

Spatializes a channel
=================
*/
extern cvar_t cl_gameplayfix_soundsmovewithentities;
static void SND_Spatialize_WithSfx(channel_t *ch, qboolean isstatic, sfx_t *sfx)
{
	int i;
	double f;
	float angle_side, angle_front, angle_factor, mixspeed;
	vec_t dist, mastervol, intensity;
	vec3_t source_vec;
	char vabuf[1024];

	// update sound origin if we know about the entity
	if (ch->entnum > 0 && cls.state == ca_connected && cl_gameplayfix_soundsmovewithentities.integer)
	{
		if (ch->entnum >= MAX_EDICTS)
		{
			//Con_Printf("-- entnum %i origin %f %f %f neworigin %f %f %f\n", ch->entnum, ch->origin[0], ch->origin[1], ch->origin[2], cl.entities[ch->entnum].state_current.origin[0], cl.entities[ch->entnum].state_current.origin[1], cl.entities[ch->entnum].state_current.origin[2]);

			if (ch->entnum > MAX_EDICTS)
				if (!CL_VM_GetEntitySoundOrigin(ch->entnum, ch->origin))
					ch->entnum = MAX_EDICTS; // entity was removed, disown sound
		}
		else if (cl.entities[ch->entnum].state_current.active)
		{
			dp_model_t *model;
			//Con_Printf("-- entnum %i origin %f %f %f neworigin %f %f %f\n", ch->entnum, ch->origin[0], ch->origin[1], ch->origin[2], cl.entities[ch->entnum].state_current.origin[0], cl.entities[ch->entnum].state_current.origin[1], cl.entities[ch->entnum].state_current.origin[2]);
			model = CL_GetModelByIndex(cl.entities[ch->entnum].state_current.modelindex);
			if (model && model->soundfromcenter)
				VectorMAM(0.5f, cl.entities[ch->entnum].render.mins, 0.5f, cl.entities[ch->entnum].render.maxs, ch->origin);
			else
				Matrix4x4_OriginFromMatrix(&cl.entities[ch->entnum].render.matrix, ch->origin);
		}
		else if (cl.csqc_server2csqcentitynumber[ch->entnum])
		{
			//Con_Printf("-- entnum %i (client %i) origin %f %f %f neworigin %f %f %f\n", ch->entnum, cl.csqc_server2csqcentitynumber[ch->entnum], ch->origin[0], ch->origin[1], ch->origin[2], cl.entities[ch->entnum].state_current.origin[0], cl.entities[ch->entnum].state_current.origin[1], cl.entities[ch->entnum].state_current.origin[2]);

			if (!CL_VM_GetEntitySoundOrigin(cl.csqc_server2csqcentitynumber[ch->entnum] + MAX_EDICTS, ch->origin))
				ch->entnum = MAX_EDICTS; // entity was removed, disown sound
		}
	}

	mastervol = ch->basevolume;
	mixspeed = ch->basespeed;

	// TODO: implement doppler based on origin change relative to viewer and time of recent origin changes

	// Adjust volume of static sounds
	if (isstatic)
		mastervol *= snd_staticvolume.value;
	else if(!(ch->flags & CHANNELFLAG_FULLVOLUME)) // same as SND_PaintChannel uses
	{
		// old legacy separated cvars
		if(ch->entnum >= MAX_EDICTS)
		{
			switch(ch->entchannel)
			{
				case 0: mastervol *= snd_csqcchannel0volume.value; break;
				case 1: mastervol *= snd_csqcchannel1volume.value; break;
				case 2: mastervol *= snd_csqcchannel2volume.value; break;
				case 3: mastervol *= snd_csqcchannel3volume.value; break;
				case 4: mastervol *= snd_csqcchannel4volume.value; break;
				case 5: mastervol *= snd_csqcchannel5volume.value; break;
				case 6: mastervol *= snd_csqcchannel6volume.value; break;
				case 7: mastervol *= snd_csqcchannel7volume.value; break;
				default:                                           break;
			}
		}
		else if(ch->entnum == 0)
		{
			switch(ch->entchannel)
			{
				case 0: mastervol *= snd_worldchannel0volume.value; break;
				case 1: mastervol *= snd_worldchannel1volume.value; break;
				case 2: mastervol *= snd_worldchannel2volume.value; break;
				case 3: mastervol *= snd_worldchannel3volume.value; break;
				case 4: mastervol *= snd_worldchannel4volume.value; break;
				case 5: mastervol *= snd_worldchannel5volume.value; break;
				case 6: mastervol *= snd_worldchannel6volume.value; break;
				case 7: mastervol *= snd_worldchannel7volume.value; break;
				default:                                            break;
			}
		}
		else if(ch->entnum > 0 && ch->entnum <= cl.maxclients)
		{
			switch(ch->entchannel)
			{
				case 0: mastervol *= snd_playerchannel0volume.value; break;
				case 1: mastervol *= snd_playerchannel1volume.value; break;
				case 2: mastervol *= snd_playerchannel2volume.value; break;
				case 3: mastervol *= snd_playerchannel3volume.value; break;
				case 4: mastervol *= snd_playerchannel4volume.value; break;
				case 5: mastervol *= snd_playerchannel5volume.value; break;
				case 6: mastervol *= snd_playerchannel6volume.value; break;
				case 7: mastervol *= snd_playerchannel7volume.value; break;
				default:                                             break;
			}
		}
		else
		{
			switch(ch->entchannel)
			{
				case 0: mastervol *= snd_entchannel0volume.value; break;
				case 1: mastervol *= snd_entchannel1volume.value; break;
				case 2: mastervol *= snd_entchannel2volume.value; break;
				case 3: mastervol *= snd_entchannel3volume.value; break;
				case 4: mastervol *= snd_entchannel4volume.value; break;
				case 5: mastervol *= snd_entchannel5volume.value; break;
				case 6: mastervol *= snd_entchannel6volume.value; break;
				case 7: mastervol *= snd_entchannel7volume.value; break;
				default:                                          break;
			}
		}

		switch(ch->entchannel)
		{
			case 0:  mastervol *= snd_channel0volume.value; break;
			case 1:  mastervol *= snd_channel1volume.value; break;
			case 2:  mastervol *= snd_channel2volume.value; break;
			case 3:  mastervol *= snd_channel3volume.value; break;
			case 4:  mastervol *= snd_channel4volume.value; break;
			case 5:  mastervol *= snd_channel5volume.value; break;
			case 6:  mastervol *= snd_channel6volume.value; break;
			case 7:  mastervol *= snd_channel7volume.value; break;
			default: mastervol *= Cvar_VariableValueOr(va(vabuf, sizeof(vabuf), "snd_channel%dvolume", CHAN_ENGINE2CVAR(ch->entchannel)), 1.0); break;
		}
	}

	// If this channel does not manage its own volume (like CD tracks)
	if (!(ch->flags & CHANNELFLAG_FULLVOLUME))
		mastervol *= volume.value;

	if(snd_maxchannelvolume.value > 0)
	{
		// clamp HERE to allow to go at most 10dB past mastervolume (before clamping), when mastervolume < -10dB (so relative volumes don't get too messy)
		mastervol = bound(0.0f, mastervol, 10.0f * snd_maxchannelvolume.value);
	}

	// always apply "master"
	mastervol *= mastervolume.value;

	// add in ReplayGain very late; prevent clipping when close
	if(sfx)
	if(sfx->volume_peak > 0)
	{
		// Replaygain support
		// Con_DPrintf("Setting volume on ReplayGain-enabled track... %f -> ", fvol);
		mastervol *= sfx->volume_mult;
		if(snd_maxchannelvolume.value > 0)
		{
			if(mastervol * sfx->volume_peak > snd_maxchannelvolume.value)
				mastervol = snd_maxchannelvolume.value / sfx->volume_peak;
		}
		// Con_DPrintf("%f\n", fvol);
	}

	if(snd_maxchannelvolume.value > 0)
	{
		// clamp HERE to keep relative volumes of the channels correct
		mastervol = min(mastervol, snd_maxchannelvolume.value);
	}

	mastervol = max(0.0f, mastervol);

	ch->mixspeed = mixspeed;

	// anything coming from the view entity will always be full volume
	// LordHavoc: make sounds with ATTN_NONE have no spatialization
	if (ch->entnum == cl.viewentity || ch->entnum == CL_VM_GetViewEntity() || ch->distfade == 0)
	{
		ch->prologic_invert = 1;
		if (snd_spatialization_prologic.integer != 0)
		{
			ch->volume[0] = mastervol * snd_speakerlayout.listeners[0].ambientvolume * sqrt(0.5);
			ch->volume[1] = mastervol * snd_speakerlayout.listeners[1].ambientvolume * sqrt(0.5);
			for (i = 2;i < SND_LISTENERS;i++)
				ch->volume[i] = 0;
		}
		else
		{
			for (i = 0;i < SND_LISTENERS;i++)
				ch->volume[i] = mastervol * snd_speakerlayout.listeners[i].ambientvolume;
		}
	}
	else
	{
		// calculate stereo seperation and distance attenuation
		VectorSubtract(listener_origin, ch->origin, source_vec);
		dist = VectorLength(source_vec);
		f = dist * ch->distfade;

		f =
			((snd_attenuation_exponent.value == 0) ? 1.0 : pow(1.0 - min(1.0, f), (double)snd_attenuation_exponent.value))
			*
			((snd_attenuation_decibel.value == 0) ? 1.0 : pow(0.1, 0.1 * snd_attenuation_decibel.value * f));

		intensity = mastervol * f;
		if (intensity > 0)
		{
			qboolean occluded = false;
			if (snd_spatialization_occlusion.integer)
			{
				if(snd_spatialization_occlusion.integer & 1)
					if(listener_pvs && cl.worldmodel)
					{
						int cluster = cl.worldmodel->brush.PointInLeaf(cl.worldmodel, ch->origin)->clusterindex;
						if(cluster >= 0 && cluster < 8 * listener_pvsbytes && !CHECKPVSBIT(listener_pvs, cluster))
							occluded = true;
					}

				if(snd_spatialization_occlusion.integer & 2)
					if(!occluded)
						if(cl.worldmodel && cl.worldmodel->brush.TraceLineOfSight && !cl.worldmodel->brush.TraceLineOfSight(cl.worldmodel, listener_origin, ch->origin, ch->origin, ch->origin))
							occluded = true;
			}
			if(occluded)
				intensity *= 0.5f;

			ch->prologic_invert = 1;
			if (snd_spatialization_prologic.integer != 0)
			{
				if (dist == 0)
					angle_factor = 0.5f;
				else
				{
					Matrix4x4_Transform(&listener_basematrix, ch->origin, source_vec);
					VectorNormalize(source_vec);

					switch(spatialmethod)
					{
						case SPATIAL_LOG:
							if(dist == 0)
								f = spatialmin + spatialdiff * (spatialfactor < 0); // avoid log(0), but do the right thing
							else
								f = spatialmin + spatialdiff * bound(0, (log(dist) - spatialoffset) * spatialfactor, 1);
							VectorScale(source_vec, f, source_vec);
							break;
						case SPATIAL_POW:
							f = (pow(dist, spatialpower) - spatialoffset) * spatialfactor;
							f = spatialmin + spatialdiff * bound(0, f, 1);
							VectorScale(source_vec, f, source_vec);
							break;
						case SPATIAL_THRESH:
							f = spatialmin + spatialdiff * (dist < spatialoffset);
							VectorScale(source_vec, f, source_vec);
							break;
						case SPATIAL_NONE:
						default:
							break;
					}

					// the z axis needs to be removed and normalized because otherwise the volume would get lower as the sound source goes higher or lower then normal
					source_vec[2] = 0;
					VectorNormalize(source_vec);
					angle_side = acos(source_vec[0]) / M_PI * 180;	// angle between 0 and 180 degrees
					angle_front = asin(source_vec[1]) / M_PI * 180;	// angle between -90 and 90 degrees
					if (angle_side > snd_spatialization_prologic_frontangle.value)
					{
						ch->prologic_invert = -1;	// this will cause the right channel to do a 180 degrees phase shift (turning the sound wave upside down),
													// but the best would be 90 degrees phase shift left and a -90 degrees phase shift right.
						angle_factor = (angle_side - snd_spatialization_prologic_frontangle.value) / (360 - 2 * snd_spatialization_prologic_frontangle.value);
						// angle_factor is between 0 and 1 and represents the angle range from the front left, to all the surround speakers (amount may vary,
						// 1 in prologic I 2 in prologic II and 3 or 4 in prologic IIx) to the front right speaker.
						if (angle_front > 0)
							angle_factor = 1 - angle_factor;
					}
					else
						angle_factor = angle_front / snd_spatialization_prologic_frontangle.value / 2.0 + 0.5;
						//angle_factor is between 0 and 1 and represents the angle range from the front left to the center to the front right speaker
				}

				ch->volume[0] = intensity * sqrt(angle_factor);
				ch->volume[1] = intensity * sqrt(1 - angle_factor);
				for (i = 2;i < SND_LISTENERS;i++)
					ch->volume[i] = 0;
			}
			else
			{
				for (i = 0;i < SND_LISTENERS;i++)
				{
					Matrix4x4_Transform(&listener_matrix[i], ch->origin, source_vec);
					VectorNormalize(source_vec);

					switch(spatialmethod)
					{
						case SPATIAL_LOG:
							if(dist == 0)
								f = spatialmin + spatialdiff * (spatialfactor < 0); // avoid log(0), but do the right thing
							else
								f = spatialmin + spatialdiff * bound(0, (log(dist) - spatialoffset) * spatialfactor, 1);
							VectorScale(source_vec, f, source_vec);
							break;
						case SPATIAL_POW:
							f = (pow(dist, spatialpower) - spatialoffset) * spatialfactor;
							f = spatialmin + spatialdiff * bound(0, f, 1);
							VectorScale(source_vec, f, source_vec);
							break;
						case SPATIAL_THRESH:
							f = spatialmin + spatialdiff * (dist < spatialoffset);
							VectorScale(source_vec, f, source_vec);
							break;
						case SPATIAL_NONE:
						default:
							break;
					}

					ch->volume[i] = intensity * max(0, source_vec[0] * snd_speakerlayout.listeners[i].dotscale + snd_speakerlayout.listeners[i].dotbias);
				}
			}
		}
		else
			for (i = 0;i < SND_LISTENERS;i++)
				ch->volume[i] = 0;
	}
}
static void SND_Spatialize(channel_t *ch, qboolean isstatic)
{
	sfx_t *sfx = ch->sfx;
	SND_Spatialize_WithSfx(ch, isstatic, sfx);
}


// =======================================================================
// Start a sound effect
// =======================================================================

static void S_PlaySfxOnChannel (sfx_t *sfx, channel_t *target_chan, unsigned int flags, vec3_t origin, float fvol, float attenuation, qboolean isstatic, int entnum, int entchannel, int startpos, float fspeed)
{
	if (!sfx)
	{
		Con_Printf("S_PlaySfxOnChannel called with NULL??\n");
		return;
	}

	if ((sfx->loopstart < sfx->total_length) || (flags & CHANNELFLAG_FORCELOOP))
	{
		if(!snd_startloopingsounds.integer)
			return;
	}
	else
	{
		if(!snd_startnonloopingsounds.integer)
			return;
	}

	// Initialize the channel
	// a crash was reported on an in-use channel, so check here...
	if (target_chan->sfx)
	{
		int channelindex = (int)(target_chan - channels);
		Con_Printf("S_PlaySfxOnChannel(%s): channel %i already in use??  Clearing.\n", sfx->name, channelindex);
		S_StopChannel (channelindex, true, false);
	}
	// We MUST set sfx LAST because otherwise we could crash a threaded mixer
	// (otherwise we'd have to call SndSys_LockRenderBuffer here)
	memset (target_chan, 0, sizeof (*target_chan));
	VectorCopy (origin, target_chan->origin);
	target_chan->flags = flags;
	target_chan->position = startpos; // start of the sound
	target_chan->entnum = entnum;
	target_chan->entchannel = entchannel;

	// If it's a static sound
	if (isstatic)
	{
		if (sfx->loopstart >= sfx->total_length && (cls.protocol == PROTOCOL_QUAKE || cls.protocol == PROTOCOL_QUAKEWORLD))
			Con_DPrintf("Quake compatibility warning: Static sound \"%s\" is not looped\n", sfx->name);
		target_chan->distfade = attenuation / (64.0f * snd_soundradius.value);
	}
	else
		target_chan->distfade = attenuation / snd_soundradius.value;

	// set the listener volumes
	S_SetChannelVolume(target_chan - channels, fvol);
	S_SetChannelSpeed(target_chan - channels, fspeed);
	SND_Spatialize_WithSfx (target_chan, isstatic, sfx);

	// finally, set the sfx pointer, so the channel becomes valid for playback
	// and will be noticed by the mixer
	target_chan->sfx = sfx;
}


int S_StartSound_StartPosition_Flags (int entnum, int entchannel, sfx_t *sfx, vec3_t origin, float fvol, float attenuation, float startposition, int flags, float fspeed)
{
	channel_t *target_chan, *check, *ch;
	int		ch_idx, startpos, i;

	if (snd_renderbuffer == NULL || sfx == NULL || nosound.integer)
		return -1;

	if(sfx == &changevolume_sfx)
	{
		if (!IS_CHAN_SINGLE(entchannel))
			return -1;
		for (ch_idx=NUM_AMBIENTS ; ch_idx < NUM_AMBIENTS + MAX_DYNAMIC_CHANNELS ; ch_idx++)
		{
			ch = &channels[ch_idx];
			if (ch->entnum == entnum && ch->entchannel == entchannel)
			{
				S_SetChannelVolume(ch_idx, fvol);
				S_SetChannelSpeed(ch_idx, fspeed);
				for(i = 1; i > 0 && (i <= flags || i <= (int) channels[ch_idx].flags); i <<= 1)
					if((flags ^ channels[ch_idx].flags) & i)
						S_SetChannelFlag(ch_idx, i, (flags & i) != 0);
				ch->distfade = attenuation / snd_soundradius.value;
				SND_Spatialize(ch, false);
				return ch_idx;
			}
		}
		return -1;
	}

	if (sfx->fetcher == NULL)
		return -1;

	// Pick a channel to play on
	target_chan = SND_PickChannel(entnum, entchannel);
	if (!target_chan)
		return -1;

	// if an identical sound has also been started this frame, offset the pos
	// a bit to keep it from just making the first one louder
	check = &channels[NUM_AMBIENTS];
	startpos = (int)(startposition * sfx->format.speed);
	if (startpos == 0)
	{
		for (ch_idx=NUM_AMBIENTS ; ch_idx < NUM_AMBIENTS + MAX_DYNAMIC_CHANNELS ; ch_idx++, check++)
		{
			if (check == target_chan)
				continue;
			if (check->sfx == sfx && check->position == 0 && check->basespeed == fspeed)
			{
				// calculate max offset
				float maxtime = snd_identicalsoundrandomization_time.value;
				float maxtics = snd_identicalsoundrandomization_tics.value;
				float maxticsdelta = ((cls.state == ca_connected) ? (maxtics * (cl.mtime[0] - cl.mtime[1])) : 0);
				float maxdelta = 0;
				if(maxticsdelta == 0 || fabs(maxticsdelta) > fabs(maxtime))
					maxdelta = maxtime;
				else
					maxdelta = fabs(maxticsdelta) * ((maxtime > 0) ? 1 : -1);

				// use negative pos offset to delay this sound effect
				startpos = lhrandom(0, maxdelta * sfx->format.speed);
				break;
			}
		}
	}

	S_PlaySfxOnChannel (sfx, target_chan, flags, origin, fvol, attenuation, false, entnum, entchannel, startpos, fspeed);

	return (target_chan - channels);
}

int S_StartSound (int entnum, int entchannel, sfx_t *sfx, vec3_t origin, float fvol, float attenuation)
{
	return S_StartSound_StartPosition_Flags(entnum, entchannel, sfx, origin, fvol, attenuation, 0, CHANNELFLAG_NONE, 1.0f);
}

void S_StopChannel (unsigned int channel_ind, qboolean lockmutex, qboolean freesfx)
{
	channel_t *ch;
	sfx_t *sfx;

	if (channel_ind >= total_channels)
		return;

	// we have to lock an audio mutex to prevent crashes if an audio mixer
	// thread is currently mixing this channel
	// the SndSys_LockRenderBuffer function uses such a mutex in
	// threaded sound backends
	if (lockmutex && !simsound)
		SndSys_LockRenderBuffer();
	
	ch = &channels[channel_ind];
	sfx = ch->sfx;
	if (sfx != NULL)
	{
		if (sfx->fetcher != NULL && sfx->fetcher->stopchannel != NULL)
			sfx->fetcher->stopchannel(ch);
		ch->fetcher_data = NULL;
		ch->sfx = NULL;
		if (freesfx)
			S_FreeSfx(sfx, true);
	}
	if (lockmutex && !simsound)
		SndSys_UnlockRenderBuffer();
}


qboolean S_SetChannelFlag (unsigned int ch_ind, unsigned int flag, qboolean value)
{
	if (ch_ind >= total_channels)
		return false;

	if (flag != CHANNELFLAG_FORCELOOP &&
		flag != CHANNELFLAG_PAUSED &&
		flag != CHANNELFLAG_FULLVOLUME &&
		flag != CHANNELFLAG_LOCALSOUND)
		return false;

	if (value)
		channels[ch_ind].flags |= flag;
	else
		channels[ch_ind].flags &= ~flag;

	return true;
}

void S_StopSound(int entnum, int entchannel)
{
	unsigned int i;

	for (i = 0; i < MAX_DYNAMIC_CHANNELS; i++)
		if (channels[i].entnum == entnum && channels[i].entchannel == entchannel)
		{
			S_StopChannel (i, true, false);
			return;
		}
}

void S_StopAllSounds (void)
{
	unsigned int i;

	// TOCHECK: is this test necessary?
	if (snd_renderbuffer == NULL)
		return;

#ifdef CONFIG_CD
	// stop CD audio because it may be using a faketrack
	CDAudio_Stop();
#endif

	if (simsound || SndSys_LockRenderBuffer ())
	{
		int clear;
		size_t memsize;

		for (i = 0; i < total_channels; i++)
			if (channels[i].sfx)
				S_StopChannel (i, false, false);

		total_channels = MAX_DYNAMIC_CHANNELS + NUM_AMBIENTS;	// no statics
		memset(channels, 0, MAX_CHANNELS * sizeof(channel_t));

		// Mute the contents of the submittion buffer
		clear = (snd_renderbuffer->format.width == 1) ? 0x80 : 0;
		memsize = snd_renderbuffer->maxframes * snd_renderbuffer->format.width * snd_renderbuffer->format.channels;
		memset(snd_renderbuffer->ring, clear, memsize);

		if (!simsound)
			SndSys_UnlockRenderBuffer ();
	}
}

void S_PauseGameSounds (qboolean toggle)
{
	unsigned int i;

	for (i = 0; i < total_channels; i++)
	{
		channel_t *ch;

		ch = &channels[i];
		if (ch->sfx != NULL && ! (ch->flags & CHANNELFLAG_LOCALSOUND))
			S_SetChannelFlag (i, CHANNELFLAG_PAUSED, toggle);
	}
}

void S_SetChannelVolume(unsigned int ch_ind, float fvol)
{
	channels[ch_ind].basevolume = fvol;
}

void S_SetChannelSpeed(unsigned int ch_ind, float fspeed)
{
	channels[ch_ind].basespeed = fspeed;
}

float S_GetChannelPosition (unsigned int ch_ind)
{
	// note: this is NOT accurate yet
	double s;
	channel_t *ch = &channels[ch_ind];
	sfx_t *sfx = ch->sfx;
	if (!sfx)
		return -1;

	s = ch->position / sfx->format.speed;
	/*
	if(!snd_usethreadedmixing)
		s += _snd_mixahead.value;
	*/
	return (float)s;
}

float S_GetEntChannelPosition(int entnum, int entchannel)
{
	channel_t *ch;
	unsigned int i;

	for (i = 0; i < total_channels; i++)
	{
		ch = &channels[i];
		if (ch->entnum == entnum && ch->entchannel == entchannel)
			return S_GetChannelPosition(i);
	}
	return -1; // no playing sound in this channel
}

/*
=================
S_StaticSound
=================
*/
void S_StaticSound (sfx_t *sfx, vec3_t origin, float fvol, float attenuation)
{
	channel_t	*target_chan;

	if (snd_renderbuffer == NULL || sfx == NULL || nosound.integer)
		return;
	if (!sfx->fetcher)
	{
		Con_Printf ("S_StaticSound: \"%s\" hasn't been precached\n", sfx->name);
		return;
	}

	if (total_channels == MAX_CHANNELS)
	{
		Con_Print("S_StaticSound: total_channels == MAX_CHANNELS\n");
		return;
	}

	target_chan = &channels[total_channels++];
	S_PlaySfxOnChannel (sfx, target_chan, CHANNELFLAG_FORCELOOP, origin, fvol, attenuation, true, 0, 0, 0, 1.0f);
}


/*
===================
S_UpdateAmbientSounds
===================
*/
static void S_UpdateAmbientSounds (void)
{
	int			i;
	float		vol;
	float		fade = (float)max(0.0, cl.time - cl.oldtime) * ambient_fade.value / 256.0f;
	int			ambient_channel;
	channel_t	*chan;
	unsigned char		ambientlevels[NUM_AMBIENTS];
	sfx_t		*sfx;

	memset(ambientlevels, 0, sizeof(ambientlevels));
	if (cl.worldmodel && cl.worldmodel->brush.AmbientSoundLevelsForPoint)
		cl.worldmodel->brush.AmbientSoundLevelsForPoint(cl.worldmodel, listener_origin, ambientlevels, sizeof(ambientlevels));

	// Calc ambient sound levels
	for (ambient_channel = 0 ; ambient_channel< NUM_AMBIENTS ; ambient_channel++)
	{
		chan = &channels[ambient_channel];
		sfx = chan->sfx; // fetch the volatile variable
		if (sfx == NULL || sfx->fetcher == NULL)
			continue;

		i = ambientlevels[ambient_channel];
		if (i < 8)
			i = 0;
		vol = i * (1.0f / 256.0f);

		// Don't adjust volume too fast
		if (chan->basevolume < vol)
		{
			chan->basevolume += fade;
			if (chan->basevolume > vol)
				chan->basevolume = vol;
		}
		else if (chan->basevolume > vol)
		{
			chan->basevolume -= fade;
			if (chan->basevolume < vol)
				chan->basevolume = vol;
		}

		if (snd_spatialization_prologic.integer != 0)
		{
			chan->volume[0] = chan->basevolume * ambient_level.value * volume.value * mastervolume.value * snd_speakerlayout.listeners[0].ambientvolume * sqrt(0.5);
			chan->volume[1] = chan->basevolume * ambient_level.value * volume.value * mastervolume.value * snd_speakerlayout.listeners[1].ambientvolume * sqrt(0.5);
			for (i = 2;i < SND_LISTENERS;i++)
				chan->volume[i] = 0.0f;
		}
		else
		{
			for (i = 0;i < SND_LISTENERS;i++)
				chan->volume[i] = chan->basevolume * ambient_level.value * volume.value * mastervolume.value * snd_speakerlayout.listeners[i].ambientvolume;
		}
	}
}

static void S_PaintAndSubmit (void)
{
	unsigned int newsoundtime, paintedtime, endtime, maxtime, usedframes;
	int usesoundtimehack;
	static int soundtimehack = -1;
	static int oldsoundtime = 0;

	if (snd_renderbuffer == NULL || nosound.integer)
		return;

	// Update sound time
	snd_usethreadedmixing = false;
	usesoundtimehack = true;
	if (cls.timedemo) // SUPER NASTY HACK to mix non-realtime sound for more reliable benchmarking
	{
		usesoundtimehack = 1;
		newsoundtime = (unsigned int)((double)cl.mtime[0] * (double)snd_renderbuffer->format.speed);
	}
	else if (cls.capturevideo.soundrate && !cls.capturevideo.realtime) // SUPER NASTY HACK to record non-realtime sound
	{
		usesoundtimehack = 2;
		newsoundtime = (unsigned int)((double)cls.capturevideo.frame * (double)snd_renderbuffer->format.speed / (double)cls.capturevideo.framerate);
	}
	else if (simsound)
	{
		usesoundtimehack = 3;
		newsoundtime = (unsigned int)((realtime - snd_starttime) * (double)snd_renderbuffer->format.speed);
	}
	else
	{
		snd_usethreadedmixing = snd_threaded && !cls.capturevideo.soundrate;
		usesoundtimehack = 0;
		newsoundtime = SndSys_GetSoundTime();
	}
	// if the soundtimehack state changes we need to reset the soundtime
	if (soundtimehack != usesoundtimehack)
	{
		snd_renderbuffer->startframe = snd_renderbuffer->endframe = soundtime = newsoundtime;

		// Mute the contents of the submission buffer
		if (simsound || SndSys_LockRenderBuffer ())
		{
			int clear;
			size_t memsize;

			clear = (snd_renderbuffer->format.width == 1) ? 0x80 : 0;
			memsize = snd_renderbuffer->maxframes * snd_renderbuffer->format.width * snd_renderbuffer->format.channels;
			memset(snd_renderbuffer->ring, clear, memsize);

			if (!simsound)
				SndSys_UnlockRenderBuffer ();
		}
	}
	soundtimehack = usesoundtimehack;

	if (!soundtimehack && snd_blocked > 0)
		return;

	if (snd_usethreadedmixing)
		return; // the audio thread will mix its own data

	newsoundtime += extrasoundtime;
	if (newsoundtime < soundtime)
	{
		if ((cls.capturevideo.soundrate != 0) != recording_sound)
		{
			unsigned int additionaltime;

			// add some time to extrasoundtime make newsoundtime higher

			// The extra time must be a multiple of the render buffer size
			// to avoid modifying the current position in the buffer,
			// some modules write directly to a shared (DMA) buffer
			additionaltime = (soundtime - newsoundtime) + snd_renderbuffer->maxframes - 1;
			additionaltime -= additionaltime % snd_renderbuffer->maxframes;

			extrasoundtime += additionaltime;
			newsoundtime += additionaltime;
			Con_DPrintf("S_PaintAndSubmit: new extra sound time = %u\n",
						extrasoundtime);
		}
		else if (!soundtimehack)
			Con_Printf("S_PaintAndSubmit: WARNING: newsoundtime < soundtime (%u < %u)\n",
					   newsoundtime, soundtime);
	}
	soundtime = newsoundtime;
	recording_sound = (cls.capturevideo.soundrate != 0);

	// Lock submitbuffer
	if (!simsound && !SndSys_LockRenderBuffer())
	{
		// If the lock failed, stop here
		Con_DPrint(">> S_PaintAndSubmit: SndSys_LockRenderBuffer() failed\n");
		return;
	}

	// Check to make sure that we haven't overshot
	paintedtime = snd_renderbuffer->endframe;
	if (paintedtime < soundtime)
		paintedtime = soundtime;

	// mix ahead of current position
	if (soundtimehack)
		endtime = soundtime + (unsigned int)(_snd_mixahead.value * (float)snd_renderbuffer->format.speed);
	else
		endtime = soundtime + (unsigned int)(max(_snd_mixahead.value * (float)snd_renderbuffer->format.speed, min(3 * (soundtime - oldsoundtime), 0.3 * (float)snd_renderbuffer->format.speed)));
	usedframes = snd_renderbuffer->endframe - snd_renderbuffer->startframe;
	maxtime = paintedtime + snd_renderbuffer->maxframes - usedframes;
	endtime = min(endtime, maxtime);

	while (paintedtime < endtime)
	{
		unsigned int startoffset;
		unsigned int nbframes;

		// see how much we can fit in the paint buffer
		nbframes = endtime - paintedtime;
		// limit to the end of the ring buffer (in case of wrapping)
		startoffset = paintedtime % snd_renderbuffer->maxframes;
		nbframes = min(nbframes, snd_renderbuffer->maxframes - startoffset);

		// mix into the buffer
		S_MixToBuffer(&snd_renderbuffer->ring[startoffset * snd_renderbuffer->format.width * snd_renderbuffer->format.channels], nbframes);

		paintedtime += nbframes;
		snd_renderbuffer->endframe = paintedtime;
	}
	if (!simsound)
		SndSys_UnlockRenderBuffer();

	// Remove outdated samples from the ring buffer, if any
	if (snd_renderbuffer->startframe < soundtime)
		snd_renderbuffer->startframe = soundtime;

	if (simsound)
		snd_renderbuffer->startframe = snd_renderbuffer->endframe;
	else
		SndSys_Submit();

	oldsoundtime = soundtime;

	cls.soundstats.latency_milliseconds = (snd_renderbuffer->endframe - snd_renderbuffer->startframe) * 1000 / snd_renderbuffer->format.speed;
	R_TimeReport("audiomix");
}

/*
============
S_Update

Called once each time through the main loop
============
*/
void S_Update(const matrix4x4_t *listenermatrix)
{
	unsigned int i, j, k;
	channel_t *ch, *combine;
	matrix4x4_t rotatematrix;

	if (snd_renderbuffer == NULL || nosound.integer)
		return;

	{
		double mindist_trans, maxdist_trans;

		spatialmin = snd_spatialization_min.value;
		spatialdiff = snd_spatialization_max.value - spatialmin;

		if(snd_spatialization_control.value)
		{
			spatialpower = snd_spatialization_power.value;

			if(spatialpower == 0)
			{
				spatialmethod = SPATIAL_LOG;
				mindist_trans = log(max(1, snd_spatialization_min_radius.value));
				maxdist_trans = log(max(1, snd_spatialization_max_radius.value));
			}
			else
			{
				spatialmethod = SPATIAL_POW;
				mindist_trans = pow(snd_spatialization_min_radius.value, spatialpower);
				maxdist_trans = pow(snd_spatialization_max_radius.value, spatialpower);
			}

			if(mindist_trans - maxdist_trans == 0)
			{
				spatialmethod = SPATIAL_THRESH;
				mindist_trans = snd_spatialization_min_radius.value;
			}
			else
			{
				spatialoffset = mindist_trans;
				spatialfactor = 1 / (maxdist_trans - mindist_trans);
			}
		}
		else
			spatialmethod = SPATIAL_NONE;

	}

	// If snd_swapstereo or snd_channellayout has changed, recompute the channel layout
	if (current_swapstereo != boolxor(snd_swapstereo.integer, v_flipped.integer) ||
		current_channellayout != snd_channellayout.integer)
		S_SetChannelLayout();

	Matrix4x4_Invert_Simple(&listener_basematrix, listenermatrix);
	Matrix4x4_OriginFromMatrix(listenermatrix, listener_origin);
	if (cl.worldmodel && cl.worldmodel->brush.FatPVS && cl.worldmodel->brush.num_pvsclusterbytes && cl.worldmodel->brush.PointInLeaf)
	{
		if(cl.worldmodel->brush.num_pvsclusterbytes != listener_pvsbytes)
		{
			if(listener_pvs)
				Mem_Free(listener_pvs);
			listener_pvsbytes = cl.worldmodel->brush.num_pvsclusterbytes;
			listener_pvs = (unsigned char *) Mem_Alloc(snd_mempool, listener_pvsbytes);
		}
		cl.worldmodel->brush.FatPVS(cl.worldmodel, listener_origin, 2, listener_pvs, listener_pvsbytes, 0);
	}
	else
	{
		if(listener_pvs)
		{
			Mem_Free(listener_pvs);
			listener_pvs = NULL;
		}
		listener_pvsbytes = 0;
	}

	// calculate the current matrices
	for (j = 0;j < SND_LISTENERS;j++)
	{
		Matrix4x4_CreateFromQuakeEntity(&rotatematrix, 0, 0, 0, 0, -snd_speakerlayout.listeners[j].yawangle, 0, 1);
		Matrix4x4_Concat(&listener_matrix[j], &rotatematrix, &listener_basematrix);
		// I think this should now do this:
		//   1. create a rotation matrix for rotating by e.g. -90 degrees CCW
		//      (note: the matrix will rotate the OBJECT, not the VIEWER, so its
		//       angle has to be taken negative)
		//   2. create a transform which first rotates and moves its argument
		//      into the player's view coordinates (using basematrix which is
		//      an inverted "absolute" listener matrix), then applies the
		//      rotation matrix for the ear
		// Isn't Matrix4x4_CreateFromQuakeEntity a bit misleading because this
		// does not actually refer to an entity?
	}

	// update general area ambient sound sources
	S_UpdateAmbientSounds ();

	combine = NULL;
	R_TimeReport("audioprep");

	// update spatialization for static and dynamic sounds
	cls.soundstats.totalsounds = 0;
	cls.soundstats.mixedsounds = 0;
	ch = channels+NUM_AMBIENTS;
	for (i=NUM_AMBIENTS ; i<total_channels; i++, ch++)
	{
		if (!ch->sfx)
			continue;
		cls.soundstats.totalsounds++;

		// respatialize channel
		SND_Spatialize(ch, i >= MAX_DYNAMIC_CHANNELS + NUM_AMBIENTS);

		// try to combine static sounds with a previous channel of the same
		// sound effect so we don't mix five torches every frame
		if (i > MAX_DYNAMIC_CHANNELS + NUM_AMBIENTS)
		{
			// no need to merge silent channels
			for (j = 0;j < SND_LISTENERS;j++)
				if (ch->volume[j])
					break;
			if (j == SND_LISTENERS)
				continue;
			// if the last combine chosen isn't suitable, find a new one
			if (!(combine && combine != ch && combine->sfx == ch->sfx))
			{
				// search for one
				combine = NULL;
				for (j = MAX_DYNAMIC_CHANNELS + NUM_AMBIENTS;j < i;j++)
				{
					if (channels[j].sfx == ch->sfx)
					{
						combine = channels + j;
						break;
					}
				}
			}
			if (combine && combine != ch && combine->sfx == ch->sfx)
			{
				for (j = 0;j < SND_LISTENERS;j++)
				{
					combine->volume[j] += ch->volume[j];
					ch->volume[j] = 0;
				}
			}
		}
		for (k = 0;k < SND_LISTENERS;k++)
			if (ch->volume[k])
				break;
		if (k < SND_LISTENERS)
			cls.soundstats.mixedsounds++;
	}
	R_TimeReport("audiospatialize");

	sound_spatialized = true;

	// debugging output
	if (snd_show.integer)
		Con_Printf("----(%u)----\n", cls.soundstats.mixedsounds);

	S_PaintAndSubmit();
}

void S_ExtraUpdate (void)
{
	if (snd_noextraupdate.integer || !sound_spatialized)
		return;

	S_PaintAndSubmit();
}

qboolean S_LocalSound (const char *sound)
{
	sfx_t	*sfx;
	int		ch_ind;

	if (!snd_initialized.integer || nosound.integer)
		return true;

	sfx = S_PrecacheSound (sound, true, false);
	if (!sfx)
	{
		Con_Printf("S_LocalSound: can't precache %s\n", sound);
		return false;
	}

	// menu sounds must not be freed on level change
	sfx->flags |= SFXFLAG_MENUSOUND;

	// fun fact: in Quake 1, this used -1 "replace any entity channel",
	// which we no longer support anyway
	// changed by Black in r4297 "Changed S_LocalSound to play multiple sounds at a time."
	ch_ind = S_StartSound (cl.viewentity, 0, sfx, vec3_origin, 1, 0);
	if (ch_ind < 0)
		return false;

	channels[ch_ind].flags |= CHANNELFLAG_LOCALSOUND;
	return true;
}