DP_SND_SOUND7_WIP1
[xonotic/darkplaces.git] / snd_main.c
1 /*
2 Copyright (C) 1996-1997 Id Software, Inc.
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 the Free Software
17 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
18
19 */
20 // snd_main.c -- main control for any streaming sound output device
21
22 #include "quakedef.h"
23
24 #include "snd_main.h"
25 #include "snd_ogg.h"
26 #include "snd_modplug.h"
27 #include "csprogs.h"
28 #include "cl_collision.h"
29
30
31 #define SND_MIN_SPEED 8000
32 #define SND_MAX_SPEED 96000
33 #define SND_MIN_WIDTH 1
34 #define SND_MAX_WIDTH 2
35 #define SND_MIN_CHANNELS 1
36 #define SND_MAX_CHANNELS 8
37 #if SND_LISTENERS != 8
38 #       error this data only supports up to 8 channel, update it!
39 #endif
40
41 speakerlayout_t snd_speakerlayout;
42
43 // Our speaker layouts are based on ALSA. They differ from those
44 // Win32 and Mac OS X APIs use when there's more than 4 channels.
45 // (rear left + rear right, and front center + LFE are swapped).
46 #define SND_SPEAKERLAYOUTS (sizeof(snd_speakerlayouts) / sizeof(snd_speakerlayouts[0]))
47 static const speakerlayout_t snd_speakerlayouts[] =
48 {
49         {
50                 "surround71", 8,
51                 {
52                         {0, 45, 0.2, 0.2, 0.5}, // front left
53                         {1, 315, 0.2, 0.2, 0.5}, // front right
54                         {2, 135, 0.2, 0.2, 0.5}, // rear left
55                         {3, 225, 0.2, 0.2, 0.5}, // rear right
56                         {4, 0, 0.2, 0.2, 0.5}, // front center
57                         {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)
58                         {6, 90, 0.2, 0.2, 0.5}, // side left
59                         {7, 180, 0.2, 0.2, 0.5}, // side right
60                 }
61         },
62         {
63                 "surround51", 6,
64                 {
65                         {0, 45, 0.2, 0.2, 0.5}, // front left
66                         {1, 315, 0.2, 0.2, 0.5}, // front right
67                         {2, 135, 0.2, 0.2, 0.5}, // rear left
68                         {3, 225, 0.2, 0.2, 0.5}, // rear right
69                         {4, 0, 0.2, 0.2, 0.5}, // front center
70                         {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)
71                         {0, 0, 0, 0, 0},
72                         {0, 0, 0, 0, 0},
73                 }
74         },
75         {
76                 // these systems sometimes have a subwoofer as well, but it has no
77                 // channel of its own
78                 "surround40", 4,
79                 {
80                         {0, 45, 0.3, 0.3, 0.8}, // front left
81                         {1, 315, 0.3, 0.3, 0.8}, // front right
82                         {2, 135, 0.3, 0.3, 0.8}, // rear left
83                         {3, 225, 0.3, 0.3, 0.8}, // rear right
84                         {0, 0, 0, 0, 0},
85                         {0, 0, 0, 0, 0},
86                         {0, 0, 0, 0, 0},
87                         {0, 0, 0, 0, 0},
88                 }
89         },
90         {
91                 // these systems sometimes have a subwoofer as well, but it has no
92                 // channel of its own
93                 "stereo", 2,
94                 {
95                         {0, 90, 0.5, 0.5, 1}, // side left
96                         {1, 270, 0.5, 0.5, 1}, // side right
97                         {0, 0, 0, 0, 0},
98                         {0, 0, 0, 0, 0},
99                         {0, 0, 0, 0, 0},
100                         {0, 0, 0, 0, 0},
101                         {0, 0, 0, 0, 0},
102                         {0, 0, 0, 0, 0},
103                 }
104         },
105         {
106                 "mono", 1,
107                 {
108                         {0, 0, 0, 1, 1}, // center
109                         {0, 0, 0, 0, 0},
110                         {0, 0, 0, 0, 0},
111                         {0, 0, 0, 0, 0},
112                         {0, 0, 0, 0, 0},
113                         {0, 0, 0, 0, 0},
114                         {0, 0, 0, 0, 0},
115                         {0, 0, 0, 0, 0},
116                 }
117         }
118 };
119
120
121 // =======================================================================
122 // Internal sound data & structures
123 // =======================================================================
124
125 channel_t channels[MAX_CHANNELS];
126 unsigned int total_channels;
127
128 snd_ringbuffer_t *snd_renderbuffer = NULL;
129 static unsigned int soundtime = 0;
130 static unsigned int oldpaintedtime = 0;
131 static unsigned int extrasoundtime = 0;
132 static double snd_starttime = 0.0;
133 qboolean snd_threaded = false;
134 qboolean snd_usethreadedmixing = false;
135
136 vec3_t listener_origin;
137 matrix4x4_t listener_basematrix;
138 static unsigned char *listener_pvs = NULL;
139 static int listener_pvsbytes = 0;
140 matrix4x4_t listener_matrix[SND_LISTENERS];
141 mempool_t *snd_mempool;
142
143 // Linked list of known sfx
144 static sfx_t *known_sfx = NULL;
145
146 static qboolean sound_spatialized = false;
147
148 qboolean simsound = false;
149
150 static qboolean recording_sound = false;
151
152 int snd_blocked = 0;
153 static int current_swapstereo = false;
154 static int current_channellayout = SND_CHANNELLAYOUT_AUTO;
155 static int current_channellayout_used = SND_CHANNELLAYOUT_AUTO;
156
157 static float spatialpower, spatialmin, spatialdiff, spatialoffset, spatialfactor;
158 typedef enum { SPATIAL_NONE, SPATIAL_LOG, SPATIAL_POW, SPATIAL_THRESH } spatialmethod_t;
159 spatialmethod_t spatialmethod;
160
161 // Cvars declared in sound.h (part of the sound API)
162 cvar_t bgmvolume = {CVAR_SAVE, "bgmvolume", "1", "volume of background music (such as CD music or replacement files such as sound/cdtracks/track002.ogg)"};
163 cvar_t mastervolume = {CVAR_SAVE, "mastervolume", "0.7", "master volume"};
164 cvar_t volume = {CVAR_SAVE, "volume", "0.7", "volume of sound effects"};
165 cvar_t snd_initialized = { CVAR_READONLY, "snd_initialized", "0", "indicates the sound subsystem is active"};
166 cvar_t snd_staticvolume = {CVAR_SAVE, "snd_staticvolume", "1", "volume of ambient sound effects (such as swampy sounds at the start of e1m2)"};
167 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)"};
168 cvar_t snd_spatialization_min_radius = {CVAR_SAVE, "snd_spatialization_min_radius", "10000", "use minimum spatialization above to this radius"};
169 cvar_t snd_spatialization_max_radius = {CVAR_SAVE, "snd_spatialization_max_radius", "100", "use maximum spatialization below this radius"};
170 cvar_t snd_spatialization_min = {CVAR_SAVE, "snd_spatialization_min", "0.70", "minimum spatializazion of sounds"};
171 cvar_t snd_spatialization_max = {CVAR_SAVE, "snd_spatialization_max", "0.95", "maximum spatialization of sounds"};
172 cvar_t snd_spatialization_power = {CVAR_SAVE, "snd_spatialization_power", "0", "exponent of the spatialization falloff curve (0: logarithmic)"};
173 cvar_t snd_spatialization_control = {CVAR_SAVE, "snd_spatialization_control", "0", "enable spatialization control (headphone friendly mode)"};
174 cvar_t snd_spatialization_prologic = {CVAR_SAVE, "snd_spatialization_prologic", "0", "use dolby prologic (I, II or IIx) encoding (snd_channels must be 2)"};
175 cvar_t snd_spatialization_prologic_frontangle = {CVAR_SAVE, "snd_spatialization_prologic_frontangle", "30", "the angle between the front speakers and the center speaker"};
176 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"};
177
178 // Cvars declared in snd_main.h (shared with other snd_*.c files)
179 cvar_t _snd_mixahead = {CVAR_SAVE, "_snd_mixahead", "0.15", "how much sound to mix ahead of time"};
180 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)"};
181 cvar_t snd_swapstereo = {CVAR_SAVE, "snd_swapstereo", "0", "swaps left/right speakers for old ISA soundblaster cards"};
182 extern cvar_t v_flipped;
183 cvar_t snd_channellayout = {0, "snd_channellayout", "0", "channel layout. Can be 0 (auto - snd_restart needed), 1 (standard layout), or 2 (ALSA layout)"};
184 cvar_t snd_mutewhenidle = {CVAR_SAVE, "snd_mutewhenidle", "1", "whether to disable sound output when game window is inactive"};
185 cvar_t snd_entchannel0volume = {CVAR_SAVE, "snd_entchannel0volume", "1", "volume multiplier of the auto-allocate entity channel of regular entities (DEPRECATED)"};
186 cvar_t snd_entchannel1volume = {CVAR_SAVE, "snd_entchannel1volume", "1", "volume multiplier of the 1st entity channel of regular entities (DEPRECATED)"};
187 cvar_t snd_entchannel2volume = {CVAR_SAVE, "snd_entchannel2volume", "1", "volume multiplier of the 2nd entity channel of regular entities (DEPRECATED)"};
188 cvar_t snd_entchannel3volume = {CVAR_SAVE, "snd_entchannel3volume", "1", "volume multiplier of the 3rd entity channel of regular entities (DEPRECATED)"};
189 cvar_t snd_entchannel4volume = {CVAR_SAVE, "snd_entchannel4volume", "1", "volume multiplier of the 4th entity channel of regular entities (DEPRECATED)"};
190 cvar_t snd_entchannel5volume = {CVAR_SAVE, "snd_entchannel5volume", "1", "volume multiplier of the 5th entity channel of regular entities (DEPRECATED)"};
191 cvar_t snd_entchannel6volume = {CVAR_SAVE, "snd_entchannel6volume", "1", "volume multiplier of the 6th entity channel of regular entities (DEPRECATED)"};
192 cvar_t snd_entchannel7volume = {CVAR_SAVE, "snd_entchannel7volume", "1", "volume multiplier of the 7th entity channel of regular entities (DEPRECATED)"};
193 cvar_t snd_playerchannel0volume = {CVAR_SAVE, "snd_playerchannel0volume", "1", "volume multiplier of the auto-allocate entity channel of player entities (DEPRECATED)"};
194 cvar_t snd_playerchannel1volume = {CVAR_SAVE, "snd_playerchannel1volume", "1", "volume multiplier of the 1st entity channel of player entities (DEPRECATED)"};
195 cvar_t snd_playerchannel2volume = {CVAR_SAVE, "snd_playerchannel2volume", "1", "volume multiplier of the 2nd entity channel of player entities (DEPRECATED)"};
196 cvar_t snd_playerchannel3volume = {CVAR_SAVE, "snd_playerchannel3volume", "1", "volume multiplier of the 3rd entity channel of player entities (DEPRECATED)"};
197 cvar_t snd_playerchannel4volume = {CVAR_SAVE, "snd_playerchannel4volume", "1", "volume multiplier of the 4th entity channel of player entities (DEPRECATED)"};
198 cvar_t snd_playerchannel5volume = {CVAR_SAVE, "snd_playerchannel5volume", "1", "volume multiplier of the 5th entity channel of player entities (DEPRECATED)"};
199 cvar_t snd_playerchannel6volume = {CVAR_SAVE, "snd_playerchannel6volume", "1", "volume multiplier of the 6th entity channel of player entities (DEPRECATED)"};
200 cvar_t snd_playerchannel7volume = {CVAR_SAVE, "snd_playerchannel7volume", "1", "volume multiplier of the 7th entity channel of player entities (DEPRECATED)"};
201 cvar_t snd_worldchannel0volume = {CVAR_SAVE, "snd_worldchannel0volume", "1", "volume multiplier of the auto-allocate entity channel of the world entity (DEPRECATED)"};
202 cvar_t snd_worldchannel1volume = {CVAR_SAVE, "snd_worldchannel1volume", "1", "volume multiplier of the 1st entity channel of the world entity (DEPRECATED)"};
203 cvar_t snd_worldchannel2volume = {CVAR_SAVE, "snd_worldchannel2volume", "1", "volume multiplier of the 2nd entity channel of the world entity (DEPRECATED)"};
204 cvar_t snd_worldchannel3volume = {CVAR_SAVE, "snd_worldchannel3volume", "1", "volume multiplier of the 3rd entity channel of the world entity (DEPRECATED)"};
205 cvar_t snd_worldchannel4volume = {CVAR_SAVE, "snd_worldchannel4volume", "1", "volume multiplier of the 4th entity channel of the world entity (DEPRECATED)"};
206 cvar_t snd_worldchannel5volume = {CVAR_SAVE, "snd_worldchannel5volume", "1", "volume multiplier of the 5th entity channel of the world entity (DEPRECATED)"};
207 cvar_t snd_worldchannel6volume = {CVAR_SAVE, "snd_worldchannel6volume", "1", "volume multiplier of the 6th entity channel of the world entity (DEPRECATED)"};
208 cvar_t snd_worldchannel7volume = {CVAR_SAVE, "snd_worldchannel7volume", "1", "volume multiplier of the 7th entity channel of the world entity (DEPRECATED)"};
209 cvar_t snd_csqcchannel0volume = {CVAR_SAVE, "snd_csqcchannel0volume", "1", "volume multiplier of the auto-allocate entity channel CSQC entities (DEPRECATED)"};
210 cvar_t snd_csqcchannel1volume = {CVAR_SAVE, "snd_csqcchannel1volume", "1", "volume multiplier of the 1st entity channel of CSQC entities (DEPRECATED)"};
211 cvar_t snd_csqcchannel2volume = {CVAR_SAVE, "snd_csqcchannel2volume", "1", "volume multiplier of the 2nd entity channel of CSQC entities (DEPRECATED)"};
212 cvar_t snd_csqcchannel3volume = {CVAR_SAVE, "snd_csqcchannel3volume", "1", "volume multiplier of the 3rd entity channel of CSQC entities (DEPRECATED)"};
213 cvar_t snd_csqcchannel4volume = {CVAR_SAVE, "snd_csqcchannel4volume", "1", "volume multiplier of the 4th entity channel of CSQC entities (DEPRECATED)"};
214 cvar_t snd_csqcchannel5volume = {CVAR_SAVE, "snd_csqcchannel5volume", "1", "volume multiplier of the 5th entity channel of CSQC entities (DEPRECATED)"};
215 cvar_t snd_csqcchannel6volume = {CVAR_SAVE, "snd_csqcchannel6volume", "1", "volume multiplier of the 6th entity channel of CSQC entities (DEPRECATED)"};
216 cvar_t snd_csqcchannel7volume = {CVAR_SAVE, "snd_csqcchannel7volume", "1", "volume multiplier of the 7th entity channel of CSQC entities (DEPRECATED)"};
217 cvar_t snd_channel0volume = {CVAR_SAVE, "snd_channel0volume", "1", "volume multiplier of the auto-allocate entity channel"};
218 cvar_t snd_channel1volume = {CVAR_SAVE, "snd_channel1volume", "1", "volume multiplier of the 1st entity channel"};
219 cvar_t snd_channel2volume = {CVAR_SAVE, "snd_channel2volume", "1", "volume multiplier of the 2nd entity channel"};
220 cvar_t snd_channel3volume = {CVAR_SAVE, "snd_channel3volume", "1", "volume multiplier of the 3rd entity channel"};
221 cvar_t snd_channel4volume = {CVAR_SAVE, "snd_channel4volume", "1", "volume multiplier of the 4th entity channel"};
222 cvar_t snd_channel5volume = {CVAR_SAVE, "snd_channel5volume", "1", "volume multiplier of the 5th entity channel"};
223 cvar_t snd_channel6volume = {CVAR_SAVE, "snd_channel6volume", "1", "volume multiplier of the 6th entity channel"};
224 cvar_t snd_channel7volume = {CVAR_SAVE, "snd_channel7volume", "1", "volume multiplier of the 7th entity channel"};
225
226 // Local cvars
227 static cvar_t nosound = {0, "nosound", "0", "disables sound"};
228 static cvar_t snd_precache = {0, "snd_precache", "1", "loads sounds before they are used"};
229 static cvar_t ambient_level = {0, "ambient_level", "0.3", "volume of environment noises (water and wind)"};
230 static cvar_t ambient_fade = {0, "ambient_fade", "100", "rate of volume fading when moving from one environment to another"};
231 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"};
232 static cvar_t snd_show = {0, "snd_show", "0", "shows some statistics about sound mixing"};
233
234 // Default sound format is 48KHz, 16-bit, stereo
235 // (48KHz because a lot of onboard sound cards sucks at any other speed)
236 static cvar_t snd_speed = {CVAR_SAVE, "snd_speed", "48000", "sound output frequency, in hertz"};
237 static cvar_t snd_width = {CVAR_SAVE, "snd_width", "2", "sound output precision, in bytes (1 and 2 supported)"};
238 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)"};
239
240 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"};
241 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"};
242
243 // Ambient sounds
244 static sfx_t* ambient_sfxs [2] = { NULL, NULL };
245 static const char* ambient_names [2] = { "sound/ambience/water1.wav", "sound/ambience/wind2.wav" };
246
247
248 // ====================================================================
249 // Functions
250 // ====================================================================
251
252 void S_FreeSfx (sfx_t *sfx, qboolean force);
253
254 static void S_Play_Common (float fvol, float attenuation)
255 {
256         int i, ch_ind;
257         char name [MAX_QPATH];
258         sfx_t *sfx;
259
260         i = 1;
261         while (i < Cmd_Argc ())
262         {
263                 // Get the name, and appends ".wav" as an extension if there's none
264                 strlcpy (name, Cmd_Argv (i), sizeof (name));
265                 if (!strrchr (name, '.'))
266                         strlcat (name, ".wav", sizeof (name));
267                 i++;
268
269                 // If we need to get the volume from the command line
270                 if (fvol == -1.0f)
271                 {
272                         fvol = atof (Cmd_Argv (i));
273                         i++;
274                 }
275
276                 sfx = S_PrecacheSound (name, true, true);
277                 if (sfx)
278                 {
279                         ch_ind = S_StartSound (-1, 0, sfx, listener_origin, fvol, attenuation);
280
281                         // Free the sfx if the file didn't exist
282                         if (!sfx->fetcher)
283                                 S_FreeSfx (sfx, false);
284                         else
285                                 channels[ch_ind].flags |= CHANNELFLAG_LOCALSOUND;
286                 }
287         }
288 }
289
290 static void S_Play_f(void)
291 {
292         S_Play_Common (1.0f, 1.0f);
293 }
294
295 static void S_Play2_f(void)
296 {
297         S_Play_Common (1.0f, 0.0f);
298 }
299
300 static void S_PlayVol_f(void)
301 {
302         S_Play_Common (-1.0f, 0.0f);
303 }
304
305 static void S_SoundList_f (void)
306 {
307         unsigned int i;
308         sfx_t *sfx;
309         unsigned int total;
310
311         total = 0;
312         for (sfx = known_sfx, i = 0; sfx != NULL; sfx = sfx->next, i++)
313         {
314                 if (sfx->fetcher != NULL)
315                 {
316                         unsigned int size;
317                         const snd_format_t* format;
318
319                         size = sfx->memsize;
320                         format = sfx->fetcher->getfmt(sfx);
321                         Con_Printf ("%c%c%c(%2db, %6s) %8i : %s\n",
322                                                 (sfx->loopstart < sfx->total_length) ? 'L' : ' ',
323                                                 (sfx->flags & SFXFLAG_STREAMED) ? 'S' : ' ',
324                                                 (sfx->flags & SFXFLAG_MENUSOUND) ? 'P' : ' ',
325                                                 format->width * 8,
326                                                 (format->channels == 1) ? "mono" : "stereo",
327                                                 size,
328                                                 sfx->name);
329                         total += size;
330                 }
331                 else
332                         Con_Printf ("    (  unknown  ) unloaded : %s\n", sfx->name);
333         }
334         Con_Printf("Total resident: %i\n", total);
335 }
336
337
338 void S_SoundInfo_f(void)
339 {
340         if (snd_renderbuffer == NULL)
341         {
342                 Con_Print("sound system not started\n");
343                 return;
344         }
345
346         Con_Printf("%5d speakers\n", snd_renderbuffer->format.channels);
347         Con_Printf("%5d frames\n", snd_renderbuffer->maxframes);
348         Con_Printf("%5d samplebits\n", snd_renderbuffer->format.width * 8);
349         Con_Printf("%5d speed\n", snd_renderbuffer->format.speed);
350         Con_Printf("%5u total_channels\n", total_channels);
351 }
352
353
354 int S_GetSoundRate(void)
355 {
356         return snd_renderbuffer ? snd_renderbuffer->format.speed : 0;
357 }
358
359 int S_GetSoundChannels(void)
360 {
361         return snd_renderbuffer ? snd_renderbuffer->format.channels : 0;
362 }
363
364
365 static qboolean S_ChooseCheaperFormat (snd_format_t* format, qboolean fixed_speed, qboolean fixed_width, qboolean fixed_channels)
366 {
367         static const snd_format_t thresholds [] =
368         {
369                 // speed                        width                   channels
370                 { SND_MIN_SPEED,        SND_MIN_WIDTH,  SND_MIN_CHANNELS },
371                 { 11025,                        1,                              2 },
372                 { 22050,                        2,                              2 },
373                 { 44100,                        2,                              2 },
374                 { 48000,                        2,                              6 },
375                 { 96000,                        2,                              6 },
376                 { SND_MAX_SPEED,        SND_MAX_WIDTH,  SND_MAX_CHANNELS },
377         };
378         const unsigned int nb_thresholds = sizeof(thresholds) / sizeof(thresholds[0]);
379         unsigned int speed_level, width_level, channels_level;
380
381         // If we have reached the minimum values, there's nothing more we can do
382         if ((format->speed == thresholds[0].speed || fixed_speed) &&
383                 (format->width == thresholds[0].width || fixed_width) &&
384                 (format->channels == thresholds[0].channels || fixed_channels))
385                 return false;
386
387         // Check the min and max values
388         #define CHECK_BOUNDARIES(param)                                                         \
389         if (format->param < thresholds[0].param)                                        \
390         {                                                                                                                       \
391                 format->param = thresholds[0].param;                                    \
392                 return true;                                                                                    \
393         }                                                                                                                       \
394         if (format->param > thresholds[nb_thresholds - 1].param)        \
395         {                                                                                                                       \
396                 format->param = thresholds[nb_thresholds - 1].param;    \
397                 return true;                                                                                    \
398         }
399         CHECK_BOUNDARIES(speed);
400         CHECK_BOUNDARIES(width);
401         CHECK_BOUNDARIES(channels);
402         #undef CHECK_BOUNDARIES
403
404         // Find the level of each parameter
405         #define FIND_LEVEL(param)                                                                       \
406         param##_level = 0;                                                                                      \
407         while (param##_level < nb_thresholds - 1)                                       \
408         {                                                                                                                       \
409                 if (format->param <= thresholds[param##_level].param)   \
410                         break;                                                                                          \
411                                                                                                                                 \
412                 param##_level++;                                                                                \
413         }
414         FIND_LEVEL(speed);
415         FIND_LEVEL(width);
416         FIND_LEVEL(channels);
417         #undef FIND_LEVEL
418
419         // Decrease the parameter with the highest level to the previous level
420         if (channels_level >= speed_level && channels_level >= width_level && !fixed_channels)
421         {
422                 format->channels = thresholds[channels_level - 1].channels;
423                 return true;
424         }
425         if (speed_level >= width_level && !fixed_speed)
426         {
427                 format->speed = thresholds[speed_level - 1].speed;
428                 return true;
429         }
430
431         format->width = thresholds[width_level - 1].width;
432         return true;
433 }
434
435
436 #define SWAP_LISTENERS(l1, l2, tmpl) { tmpl = (l1); (l1) = (l2); (l2) = tmpl; }
437
438 static void S_SetChannelLayout (void)
439 {
440         unsigned int i;
441         listener_t swaplistener;
442         listener_t *listeners;
443         int layout;
444
445         for (i = 0; i < SND_SPEAKERLAYOUTS; i++)
446                 if (snd_speakerlayouts[i].channels == snd_renderbuffer->format.channels)
447                         break;
448         if (i >= SND_SPEAKERLAYOUTS)
449         {
450                 Con_Printf("S_SetChannelLayout: can't find the speaker layout for %hu channels. Defaulting to mono output\n",
451                                    snd_renderbuffer->format.channels);
452                 i = SND_SPEAKERLAYOUTS - 1;
453         }
454
455         snd_speakerlayout = snd_speakerlayouts[i];
456         listeners = snd_speakerlayout.listeners;
457
458         // Swap the left and right channels if snd_swapstereo is set
459         if (boolxor(snd_swapstereo.integer, v_flipped.integer))
460         {
461                 switch (snd_speakerlayout.channels)
462                 {
463                         case 8:
464                                 SWAP_LISTENERS(listeners[6], listeners[7], swaplistener);
465                                 // no break
466                         case 4:
467                         case 6:
468                                 SWAP_LISTENERS(listeners[2], listeners[3], swaplistener);
469                                 // no break
470                         case 2:
471                                 SWAP_LISTENERS(listeners[0], listeners[1], swaplistener);
472                                 break;
473
474                         default:
475                         case 1:
476                                 // Nothing to do
477                                 break;
478                 }
479         }
480
481         // Sanity check
482         if (snd_channellayout.integer < SND_CHANNELLAYOUT_AUTO ||
483                 snd_channellayout.integer > SND_CHANNELLAYOUT_ALSA)
484                 Cvar_SetValueQuick (&snd_channellayout, SND_CHANNELLAYOUT_STANDARD);
485
486         if (snd_channellayout.integer == SND_CHANNELLAYOUT_AUTO)
487         {
488                 // If we're in the sound engine initialization
489                 if (current_channellayout_used == SND_CHANNELLAYOUT_AUTO)
490                 {
491                         layout = SND_CHANNELLAYOUT_STANDARD;
492                         Cvar_SetValueQuick (&snd_channellayout, layout);
493                 }
494                 else
495                         layout = current_channellayout_used;
496         }
497         else
498                 layout = snd_channellayout.integer;
499
500         // Convert our layout (= ALSA) to the standard layout if necessary
501         if (snd_speakerlayout.channels == 6 || snd_speakerlayout.channels == 8)
502         {
503                 if (layout == SND_CHANNELLAYOUT_STANDARD)
504                 {
505                         SWAP_LISTENERS(listeners[2], listeners[4], swaplistener);
506                         SWAP_LISTENERS(listeners[3], listeners[5], swaplistener);
507                 }
508
509                 Con_Printf("S_SetChannelLayout: using %s speaker layout for 3D sound\n",
510                                    (layout == SND_CHANNELLAYOUT_ALSA) ? "ALSA" : "standard");
511         }
512
513         current_swapstereo = boolxor(snd_swapstereo.integer, v_flipped.integer);
514         current_channellayout = snd_channellayout.integer;
515         current_channellayout_used = layout;
516 }
517
518
519 void S_Startup (void)
520 {
521         qboolean fixed_speed, fixed_width, fixed_channels;
522         snd_format_t chosen_fmt;
523         static snd_format_t prev_render_format = {0, 0, 0};
524         char* env;
525 #if _MSC_VER >= 1400
526         size_t envlen;
527 #endif
528         int i;
529
530         if (!snd_initialized.integer)
531                 return;
532
533         fixed_speed = false;
534         fixed_width = false;
535         fixed_channels = false;
536
537         // Get the starting sound format from the cvars
538         chosen_fmt.speed = snd_speed.integer;
539         chosen_fmt.width = snd_width.integer;
540         chosen_fmt.channels = snd_channels.integer;
541
542         // Check the environment variables to see if the player wants a particular sound format
543 #if _MSC_VER >= 1400
544         _dupenv_s(&env, &envlen, "QUAKE_SOUND_CHANNELS");
545 #else
546         env = getenv("QUAKE_SOUND_CHANNELS");
547 #endif
548         if (env != NULL)
549         {
550                 chosen_fmt.channels = atoi (env);
551 #if _MSC_VER >= 1400
552                 free(env);
553 #endif
554                 fixed_channels = true;
555         }
556 #if _MSC_VER >= 1400
557         _dupenv_s(&env, &envlen, "QUAKE_SOUND_SPEED");
558 #else
559         env = getenv("QUAKE_SOUND_SPEED");
560 #endif
561         if (env != NULL)
562         {
563                 chosen_fmt.speed = atoi (env);
564 #if _MSC_VER >= 1400
565                 free(env);
566 #endif
567                 fixed_speed = true;
568         }
569 #if _MSC_VER >= 1400
570         _dupenv_s(&env, &envlen, "QUAKE_SOUND_SAMPLEBITS");
571 #else
572         env = getenv("QUAKE_SOUND_SAMPLEBITS");
573 #endif
574         if (env != NULL)
575         {
576                 chosen_fmt.width = atoi (env) / 8;
577 #if _MSC_VER >= 1400
578                 free(env);
579 #endif
580                 fixed_width = true;
581         }
582
583         // Parse the command line to see if the player wants a particular sound format
584 // COMMANDLINEOPTION: Sound: -sndquad sets sound output to 4 channel surround
585         if (COM_CheckParm ("-sndquad") != 0)
586         {
587                 chosen_fmt.channels = 4;
588                 fixed_channels = true;
589         }
590 // COMMANDLINEOPTION: Sound: -sndstereo sets sound output to stereo
591         else if (COM_CheckParm ("-sndstereo") != 0)
592         {
593                 chosen_fmt.channels = 2;
594                 fixed_channels = true;
595         }
596 // COMMANDLINEOPTION: Sound: -sndmono sets sound output to mono
597         else if (COM_CheckParm ("-sndmono") != 0)
598         {
599                 chosen_fmt.channels = 1;
600                 fixed_channels = true;
601         }
602 // COMMANDLINEOPTION: Sound: -sndspeed <hz> chooses sound output rate (supported values are 48000, 44100, 32000, 24000, 22050, 16000, 11025 (quake), 8000)
603         i = COM_CheckParm ("-sndspeed");
604         if (0 < i && i < com_argc - 1)
605         {
606                 chosen_fmt.speed = atoi (com_argv[i + 1]);
607                 fixed_speed = true;
608         }
609 // COMMANDLINEOPTION: Sound: -sndbits <bits> chooses 8 bit or 16 bit sound output
610         i = COM_CheckParm ("-sndbits");
611         if (0 < i && i < com_argc - 1)
612         {
613                 chosen_fmt.width = atoi (com_argv[i + 1]) / 8;
614                 fixed_width = true;
615         }
616
617         // You can't change sound speed after start time (not yet supported)
618         if (prev_render_format.speed != 0)
619         {
620                 fixed_speed = true;
621                 if (chosen_fmt.speed != prev_render_format.speed)
622                 {
623                         Con_Printf("S_Startup: sound speed has changed! This is NOT supported yet. Falling back to previous speed (%u Hz)\n",
624                                            prev_render_format.speed);
625                         chosen_fmt.speed = prev_render_format.speed;
626                 }
627         }
628
629         // Sanity checks
630         if (chosen_fmt.speed < SND_MIN_SPEED)
631         {
632                 chosen_fmt.speed = SND_MIN_SPEED;
633                 fixed_speed = false;
634         }
635         else if (chosen_fmt.speed > SND_MAX_SPEED)
636         {
637                 chosen_fmt.speed = SND_MAX_SPEED;
638                 fixed_speed = false;
639         }
640
641         if (chosen_fmt.width < SND_MIN_WIDTH)
642         {
643                 chosen_fmt.width = SND_MIN_WIDTH;
644                 fixed_width = false;
645         }
646         else if (chosen_fmt.width > SND_MAX_WIDTH)
647         {
648                 chosen_fmt.width = SND_MAX_WIDTH;
649                 fixed_width = false;
650         }
651
652         if (chosen_fmt.channels < SND_MIN_CHANNELS)
653         {
654                 chosen_fmt.channels = SND_MIN_CHANNELS;
655                 fixed_channels = false;
656         }
657         else if (chosen_fmt.channels > SND_MAX_CHANNELS)
658         {
659                 chosen_fmt.channels = SND_MAX_CHANNELS;
660                 fixed_channels = false;
661         }
662
663         // create the sound buffer used for sumitting the samples to the plaform-dependent module
664         if (!simsound)
665         {
666                 snd_format_t suggest_fmt;
667                 qboolean accepted;
668
669                 accepted = false;
670                 do
671                 {
672                         Con_Printf("S_Startup: initializing sound output format: %dHz, %d bit, %d channels...\n",
673                                                 chosen_fmt.speed, chosen_fmt.width * 8,
674                                                 chosen_fmt.channels);
675
676                         memset(&suggest_fmt, 0, sizeof(suggest_fmt));
677                         accepted = SndSys_Init(&chosen_fmt, &suggest_fmt);
678
679                         if (!accepted)
680                         {
681                                 Con_Printf("S_Startup: sound output initialization FAILED\n");
682
683                                 // If the module is suggesting another one
684                                 if (suggest_fmt.speed != 0)
685                                 {
686                                         memcpy(&chosen_fmt, &suggest_fmt, sizeof(chosen_fmt));
687                                         Con_Printf ("           Driver has suggested %dHz, %d bit, %d channels. Retrying...\n",
688                                                                 suggest_fmt.speed, suggest_fmt.width * 8,
689                                                                 suggest_fmt.channels);
690                                 }
691                                 // Else, try to find a less resource-demanding format
692                                 else if (!S_ChooseCheaperFormat (&chosen_fmt, fixed_speed, fixed_width, fixed_channels))
693                                         break;
694                         }
695                 } while (!accepted);
696
697                 // If we haven't found a suitable format
698                 if (!accepted)
699                 {
700                         Con_Print("S_Startup: SndSys_Init failed.\n");
701                         sound_spatialized = false;
702                         return;
703                 }
704         }
705         else
706         {
707                 snd_renderbuffer = Snd_CreateRingBuffer(&chosen_fmt, 0, NULL);
708                 Con_Print ("S_Startup: simulating sound output\n");
709         }
710
711         memcpy(&prev_render_format, &snd_renderbuffer->format, sizeof(prev_render_format));
712         Con_Printf("Sound format: %dHz, %d channels, %d bits per sample\n",
713                            chosen_fmt.speed, chosen_fmt.channels, chosen_fmt.width * 8);
714
715         // Update the cvars
716         if (snd_speed.integer != (int)chosen_fmt.speed)
717                 Cvar_SetValueQuick(&snd_speed, chosen_fmt.speed);
718         if (snd_width.integer != chosen_fmt.width)
719                 Cvar_SetValueQuick(&snd_width, chosen_fmt.width);
720         if (snd_channels.integer != chosen_fmt.channels)
721                 Cvar_SetValueQuick(&snd_channels, chosen_fmt.channels);
722
723         current_channellayout_used = SND_CHANNELLAYOUT_AUTO;
724         S_SetChannelLayout();
725
726         snd_starttime = realtime;
727
728         // If the sound module has already run, add an extra time to make sure
729         // the sound time doesn't decrease, to not confuse playing SFXs
730         if (oldpaintedtime != 0)
731         {
732                 // The extra time must be a multiple of the render buffer size
733                 // to avoid modifying the current position in the buffer,
734                 // some modules write directly to a shared (DMA) buffer
735                 extrasoundtime = oldpaintedtime + snd_renderbuffer->maxframes - 1;
736                 extrasoundtime -= extrasoundtime % snd_renderbuffer->maxframes;
737                 Con_Printf("S_Startup: extra sound time = %u\n", extrasoundtime);
738
739                 soundtime = extrasoundtime;
740         }
741         else
742                 extrasoundtime = 0;
743         snd_renderbuffer->startframe = soundtime;
744         snd_renderbuffer->endframe = soundtime;
745         recording_sound = false;
746 }
747
748 void S_Shutdown(void)
749 {
750         if (snd_renderbuffer == NULL)
751                 return;
752
753         oldpaintedtime = snd_renderbuffer->endframe;
754
755         if (simsound)
756         {
757                 Mem_Free(snd_renderbuffer->ring);
758                 Mem_Free(snd_renderbuffer);
759                 snd_renderbuffer = NULL;
760         }
761         else
762                 SndSys_Shutdown();
763
764         sound_spatialized = false;
765 }
766
767 void S_Restart_f(void)
768 {
769         // NOTE: we can't free all sounds if we are running a map (this frees sfx_t that are still referenced by precaches)
770         // So, refuse to do this if we are connected.
771         if(cls.state == ca_connected)
772         {
773                 Con_Printf("snd_restart would wreak havoc if you do that while connected!\n");
774                 return;
775         }
776
777         S_Shutdown();
778         S_Startup();
779 }
780
781 /*
782 ================
783 S_Init
784 ================
785 */
786 void S_Init(void)
787 {
788         Cvar_RegisterVariable(&volume);
789         Cvar_RegisterVariable(&bgmvolume);
790         Cvar_RegisterVariable(&mastervolume);
791         Cvar_RegisterVariable(&snd_staticvolume);
792         Cvar_RegisterVariable(&snd_entchannel0volume);
793         Cvar_RegisterVariable(&snd_entchannel1volume);
794         Cvar_RegisterVariable(&snd_entchannel2volume);
795         Cvar_RegisterVariable(&snd_entchannel3volume);
796         Cvar_RegisterVariable(&snd_entchannel4volume);
797         Cvar_RegisterVariable(&snd_entchannel5volume);
798         Cvar_RegisterVariable(&snd_entchannel6volume);
799         Cvar_RegisterVariable(&snd_entchannel7volume);
800         Cvar_RegisterVariable(&snd_worldchannel0volume);
801         Cvar_RegisterVariable(&snd_worldchannel1volume);
802         Cvar_RegisterVariable(&snd_worldchannel2volume);
803         Cvar_RegisterVariable(&snd_worldchannel3volume);
804         Cvar_RegisterVariable(&snd_worldchannel4volume);
805         Cvar_RegisterVariable(&snd_worldchannel5volume);
806         Cvar_RegisterVariable(&snd_worldchannel6volume);
807         Cvar_RegisterVariable(&snd_worldchannel7volume);
808         Cvar_RegisterVariable(&snd_playerchannel0volume);
809         Cvar_RegisterVariable(&snd_playerchannel1volume);
810         Cvar_RegisterVariable(&snd_playerchannel2volume);
811         Cvar_RegisterVariable(&snd_playerchannel3volume);
812         Cvar_RegisterVariable(&snd_playerchannel4volume);
813         Cvar_RegisterVariable(&snd_playerchannel5volume);
814         Cvar_RegisterVariable(&snd_playerchannel6volume);
815         Cvar_RegisterVariable(&snd_playerchannel7volume);
816         Cvar_RegisterVariable(&snd_csqcchannel0volume);
817         Cvar_RegisterVariable(&snd_csqcchannel1volume);
818         Cvar_RegisterVariable(&snd_csqcchannel2volume);
819         Cvar_RegisterVariable(&snd_csqcchannel3volume);
820         Cvar_RegisterVariable(&snd_csqcchannel4volume);
821         Cvar_RegisterVariable(&snd_csqcchannel5volume);
822         Cvar_RegisterVariable(&snd_csqcchannel6volume);
823         Cvar_RegisterVariable(&snd_csqcchannel7volume);
824         Cvar_RegisterVariable(&snd_channel0volume);
825         Cvar_RegisterVariable(&snd_channel1volume);
826         Cvar_RegisterVariable(&snd_channel2volume);
827         Cvar_RegisterVariable(&snd_channel3volume);
828         Cvar_RegisterVariable(&snd_channel4volume);
829         Cvar_RegisterVariable(&snd_channel5volume);
830         Cvar_RegisterVariable(&snd_channel6volume);
831         Cvar_RegisterVariable(&snd_channel7volume);
832
833         Cvar_RegisterVariable(&snd_spatialization_min_radius);
834         Cvar_RegisterVariable(&snd_spatialization_max_radius);
835         Cvar_RegisterVariable(&snd_spatialization_min);
836         Cvar_RegisterVariable(&snd_spatialization_max);
837         Cvar_RegisterVariable(&snd_spatialization_power);
838         Cvar_RegisterVariable(&snd_spatialization_control);
839         Cvar_RegisterVariable(&snd_spatialization_occlusion);
840         Cvar_RegisterVariable(&snd_spatialization_prologic);
841         Cvar_RegisterVariable(&snd_spatialization_prologic_frontangle);
842
843         Cvar_RegisterVariable(&snd_speed);
844         Cvar_RegisterVariable(&snd_width);
845         Cvar_RegisterVariable(&snd_channels);
846         Cvar_RegisterVariable(&snd_mutewhenidle);
847
848         Cvar_RegisterVariable(&snd_startloopingsounds);
849         Cvar_RegisterVariable(&snd_startnonloopingsounds);
850
851 // COMMANDLINEOPTION: Sound: -nosound disables sound (including CD audio)
852         if (COM_CheckParm("-nosound"))
853         {
854                 // dummy out Play and Play2 because mods stuffcmd that
855                 Cmd_AddCommand("play", Host_NoOperation_f, "does nothing because -nosound was specified");
856                 Cmd_AddCommand("play2", Host_NoOperation_f, "does nothing because -nosound was specified");
857                 return;
858         }
859
860         snd_mempool = Mem_AllocPool("sound", 0, NULL);
861
862 // COMMANDLINEOPTION: Sound: -simsound runs sound mixing but with no output
863         if (COM_CheckParm("-simsound"))
864                 simsound = true;
865
866         Cmd_AddCommand("play", S_Play_f, "play a sound at your current location (not heard by anyone else)");
867         Cmd_AddCommand("play2", S_Play2_f, "play a sound globally throughout the level (not heard by anyone else)");
868         Cmd_AddCommand("playvol", S_PlayVol_f, "play a sound at the specified volume level at your current location (not heard by anyone else)");
869         Cmd_AddCommand("stopsound", S_StopAllSounds, "silence");
870         Cmd_AddCommand("soundlist", S_SoundList_f, "list loaded sounds");
871         Cmd_AddCommand("soundinfo", S_SoundInfo_f, "print sound system information (such as channels and speed)");
872         Cmd_AddCommand("snd_restart", S_Restart_f, "restart sound system");
873         Cmd_AddCommand("snd_unloadallsounds", S_UnloadAllSounds_f, "unload all sound files");
874
875         Cvar_RegisterVariable(&nosound);
876         Cvar_RegisterVariable(&snd_precache);
877         Cvar_RegisterVariable(&snd_initialized);
878         Cvar_RegisterVariable(&snd_streaming);
879         Cvar_RegisterVariable(&ambient_level);
880         Cvar_RegisterVariable(&ambient_fade);
881         Cvar_RegisterVariable(&snd_noextraupdate);
882         Cvar_RegisterVariable(&snd_show);
883         Cvar_RegisterVariable(&_snd_mixahead);
884         Cvar_RegisterVariable(&snd_swapstereo); // for people with backwards sound wiring
885         Cvar_RegisterVariable(&snd_channellayout);
886         Cvar_RegisterVariable(&snd_soundradius);
887
888         Cvar_SetValueQuick(&snd_initialized, true);
889
890         known_sfx = NULL;
891
892         total_channels = MAX_DYNAMIC_CHANNELS + NUM_AMBIENTS;   // no statics
893         memset(channels, 0, MAX_CHANNELS * sizeof(channel_t));
894
895         OGG_OpenLibrary ();
896         ModPlug_OpenLibrary ();
897 }
898
899
900 /*
901 ================
902 S_Terminate
903
904 Shutdown and free all resources
905 ================
906 */
907 void S_Terminate (void)
908 {
909         S_Shutdown ();
910         ModPlug_CloseLibrary ();
911         OGG_CloseLibrary ();
912
913         // Free all SFXs
914         while (known_sfx != NULL)
915                 S_FreeSfx (known_sfx, true);
916
917         Cvar_SetValueQuick (&snd_initialized, false);
918         Mem_FreePool (&snd_mempool);
919 }
920
921
922 /*
923 ==================
924 S_UnloadAllSounds_f
925 ==================
926 */
927 void S_UnloadAllSounds_f (void)
928 {
929         int i;
930
931         // NOTE: we can't free all sounds if we are running a map (this frees sfx_t that are still referenced by precaches)
932         // So, refuse to do this if we are connected.
933         if(cls.state == ca_connected)
934         {
935                 Con_Printf("snd_unloadallsounds would wreak havoc if you do that while connected!\n");
936                 return;
937         }
938
939         // stop any active sounds
940         S_StopAllSounds();
941
942         // because the ambient sounds will be freed, clear the pointers
943         for (i = 0;i < (int)sizeof (ambient_sfxs) / (int)sizeof (ambient_sfxs[0]);i++)
944                 ambient_sfxs[i] = NULL;
945
946         // now free all sounds
947         while (known_sfx != NULL)
948                 S_FreeSfx (known_sfx, true);
949 }
950
951
952 /*
953 ==================
954 S_FindName
955 ==================
956 */
957 sfx_t changevolume_sfx = {""};
958 sfx_t *S_FindName (const char *name)
959 {
960         sfx_t *sfx;
961
962         if (!snd_initialized.integer)
963                 return NULL;
964
965         if(!strcmp(name, changevolume_sfx.name))
966                 return &changevolume_sfx;
967
968         if (strlen (name) >= sizeof (sfx->name))
969         {
970                 Con_Printf ("S_FindName: sound name too long (%s)\n", name);
971                 return NULL;
972         }
973
974         // Look for this sound in the list of known sfx
975         // TODO: hash table search?
976         for (sfx = known_sfx; sfx != NULL; sfx = sfx->next)
977                 if(!strcmp (sfx->name, name))
978                         return sfx;
979
980         // Add a sfx_t struct for this sound
981         sfx = (sfx_t *)Mem_Alloc (snd_mempool, sizeof (*sfx));
982         memset (sfx, 0, sizeof(*sfx));
983         strlcpy (sfx->name, name, sizeof (sfx->name));
984         sfx->memsize = sizeof(*sfx);
985         sfx->next = known_sfx;
986         known_sfx = sfx;
987
988         return sfx;
989 }
990
991
992 /*
993 ==================
994 S_FreeSfx
995 ==================
996 */
997 void S_FreeSfx (sfx_t *sfx, qboolean force)
998 {
999         unsigned int i;
1000
1001         // Do not free a precached sound during purge
1002         if (!force && (sfx->flags & (SFXFLAG_LEVELSOUND | SFXFLAG_MENUSOUND)))
1003                 return;
1004
1005         if (developer_loading.integer)
1006                 Con_Printf ("unloading sound %s\n", sfx->name);
1007
1008         // Remove it from the list of known sfx
1009         if (sfx == known_sfx)
1010                 known_sfx = known_sfx->next;
1011         else
1012         {
1013                 sfx_t *prev_sfx;
1014
1015                 for (prev_sfx = known_sfx; prev_sfx != NULL; prev_sfx = prev_sfx->next)
1016                         if (prev_sfx->next == sfx)
1017                         {
1018                                 prev_sfx->next = sfx->next;
1019                                 break;
1020                         }
1021                 if (prev_sfx == NULL)
1022                 {
1023                         Con_Printf ("S_FreeSfx: Can't find SFX %s in the list!\n", sfx->name);
1024                         return;
1025                 }
1026         }
1027
1028         // Stop all channels using this sfx
1029         for (i = 0; i < total_channels; i++)
1030         {
1031                 if (channels[i].sfx == sfx)
1032                 {
1033                         Con_Printf("S_FreeSfx: stopping channel %i for sfx \"%s\"\n", i, sfx->name);
1034                         S_StopChannel (i, true, false);
1035                 }
1036         }
1037
1038         // Free it
1039         if (sfx->fetcher != NULL && sfx->fetcher->free != NULL)
1040                 sfx->fetcher->free (sfx->fetcher_data);
1041         Mem_Free (sfx);
1042 }
1043
1044
1045 /*
1046 ==================
1047 S_ClearUsed
1048 ==================
1049 */
1050 void S_ClearUsed (void)
1051 {
1052         sfx_t *sfx;
1053 //      sfx_t *sfxnext;
1054         unsigned int i;
1055
1056         // Start the ambient sounds and make them loop
1057         for (i = 0; i < sizeof (ambient_sfxs) / sizeof (ambient_sfxs[0]); i++)
1058         {
1059                 // Precache it if it's not done (and pass false for levelsound because these are permanent)
1060                 if (ambient_sfxs[i] == NULL)
1061                         ambient_sfxs[i] = S_PrecacheSound (ambient_names[i], false, false);
1062                 if (ambient_sfxs[i] != NULL)
1063                 {
1064                         channels[i].sfx = ambient_sfxs[i];
1065                         channels[i].sfx->flags |= SFXFLAG_MENUSOUND;
1066                         channels[i].flags |= CHANNELFLAG_FORCELOOP;
1067                         channels[i].master_vol = 0;
1068                 }
1069         }
1070
1071         // Clear SFXFLAG_LEVELSOUND flag so that sounds not precached this level will be purged
1072         for (sfx = known_sfx; sfx != NULL; sfx = sfx->next)
1073                 sfx->flags &= ~SFXFLAG_LEVELSOUND;
1074 }
1075
1076 /*
1077 ==================
1078 S_PurgeUnused
1079 ==================
1080 */
1081 void S_PurgeUnused(void)
1082 {
1083         sfx_t *sfx;
1084         sfx_t *sfxnext;
1085
1086         // Free all not-precached per-level sfx
1087         for (sfx = known_sfx;sfx;sfx = sfxnext)
1088         {
1089                 sfxnext = sfx->next;
1090                 if (!(sfx->flags & (SFXFLAG_LEVELSOUND | SFXFLAG_MENUSOUND)))
1091                         S_FreeSfx (sfx, false);
1092         }
1093 }
1094
1095
1096 /*
1097 ==================
1098 S_PrecacheSound
1099 ==================
1100 */
1101 sfx_t *S_PrecacheSound (const char *name, qboolean complain, qboolean levelsound)
1102 {
1103         sfx_t *sfx;
1104
1105         if (!snd_initialized.integer)
1106                 return NULL;
1107
1108         if (name == NULL || name[0] == 0)
1109                 return NULL;
1110
1111         sfx = S_FindName (name);
1112
1113         if (sfx == NULL)
1114                 return NULL;
1115
1116         // clear the FILEMISSING flag so that S_LoadSound will try again on a
1117         // previously missing file
1118         sfx->flags &= ~ SFXFLAG_FILEMISSING;
1119
1120         // set a flag to indicate this has been precached for this level or permanently
1121         if (levelsound)
1122                 sfx->flags |= SFXFLAG_LEVELSOUND;
1123         else
1124                 sfx->flags |= SFXFLAG_MENUSOUND;
1125
1126         if (!nosound.integer && snd_precache.integer)
1127                 S_LoadSound(sfx, complain);
1128
1129         return sfx;
1130 }
1131
1132 /*
1133 ==================
1134 S_SoundLength
1135 ==================
1136 */
1137
1138 float S_SoundLength(const char *name)
1139 {
1140         sfx_t *sfx;
1141
1142         if (!snd_initialized.integer)
1143                 return -1;
1144         if (name == NULL || name[0] == 0)
1145                 return -1;
1146
1147         sfx = S_FindName(name);
1148         if (sfx == NULL)
1149                 return -1;
1150         return sfx->total_length / (float) S_GetSoundRate();
1151 }
1152
1153 /*
1154 ==================
1155 S_IsSoundPrecached
1156 ==================
1157 */
1158 qboolean S_IsSoundPrecached (const sfx_t *sfx)
1159 {
1160         return (sfx != NULL && sfx->fetcher != NULL) || (sfx == &changevolume_sfx);
1161 }
1162
1163 /*
1164 ==================
1165 S_BlockSound
1166 ==================
1167 */
1168 void S_BlockSound (void)
1169 {
1170         snd_blocked++;
1171 }
1172
1173
1174 /*
1175 ==================
1176 S_UnblockSound
1177 ==================
1178 */
1179 void S_UnblockSound (void)
1180 {
1181         snd_blocked--;
1182 }
1183
1184
1185 /*
1186 =================
1187 SND_PickChannel
1188
1189 Picks a channel based on priorities, empty slots, number of channels
1190 =================
1191 */
1192 channel_t *SND_PickChannel(int entnum, int entchannel)
1193 {
1194         int ch_idx;
1195         int first_to_die;
1196         int first_life_left, life_left;
1197         channel_t* ch;
1198         sfx_t *sfx; // use this instead of ch->sfx->, because that is volatile.
1199
1200 // Check for replacement sound, or find the best one to replace
1201         first_to_die = -1;
1202         first_life_left = 0x7fffffff;
1203
1204         // entity channels try to replace the existing sound on the channel
1205         // channels <= 0 are autochannels
1206         if (IS_CHAN_SINGLE(entchannel))
1207         {
1208                 for (ch_idx=NUM_AMBIENTS ; ch_idx < NUM_AMBIENTS + MAX_DYNAMIC_CHANNELS ; ch_idx++)
1209                 {
1210                         ch = &channels[ch_idx];
1211                         if (ch->entnum == entnum && ch->entchannel == entchannel)
1212                         {
1213                                 // always override sound from same entity
1214                                 S_StopChannel (ch_idx, true, false);
1215                                 return &channels[ch_idx];
1216                         }
1217                 }
1218         }
1219
1220         // there was no channel to override, so look for the first empty one
1221         for (ch_idx=NUM_AMBIENTS ; ch_idx < NUM_AMBIENTS + MAX_DYNAMIC_CHANNELS ; ch_idx++)
1222         {
1223                 ch = &channels[ch_idx];
1224                 sfx = ch->sfx; // fetch the volatile variable
1225                 if (!sfx)
1226                 {
1227                         // no sound on this channel
1228                         first_to_die = ch_idx;
1229                         goto emptychan_found;
1230                 }
1231
1232                 // don't let monster sounds override player sounds
1233                 if (ch->entnum == cl.viewentity && entnum != cl.viewentity)
1234                         continue;
1235
1236                 // don't override looped sounds
1237                 if ((ch->flags & CHANNELFLAG_FORCELOOP) || sfx->loopstart < sfx->total_length)
1238                         continue;
1239                 life_left = sfx->total_length - ch->pos;
1240
1241                 if (life_left < first_life_left)
1242                 {
1243                         first_life_left = life_left;
1244                         first_to_die = ch_idx;
1245                 }
1246         }
1247
1248         if (first_to_die == -1)
1249                 return NULL;
1250         
1251         S_StopChannel (first_to_die, true, false);
1252
1253 emptychan_found:
1254         return &channels[first_to_die];
1255 }
1256
1257 /*
1258 =================
1259 SND_Spatialize
1260
1261 Spatializes a channel
1262 =================
1263 */
1264 extern cvar_t cl_gameplayfix_soundsmovewithentities;
1265 void SND_Spatialize_WithSfx(channel_t *ch, qboolean isstatic, sfx_t *sfx)
1266 {
1267         int i;
1268         double f;
1269         float angle_side, angle_front, angle_factor;
1270         vec_t dist, mastervol, intensity, vol;
1271         vec3_t source_vec;
1272
1273         // update sound origin if we know about the entity
1274         if (ch->entnum > 0 && cls.state == ca_connected && cl_gameplayfix_soundsmovewithentities.integer)
1275         {
1276                 if (ch->entnum >= MAX_EDICTS)
1277                 {
1278                         //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]);
1279
1280                         if (ch->entnum > MAX_EDICTS)
1281                                 if (!CL_VM_GetEntitySoundOrigin(ch->entnum, ch->origin))
1282                                         ch->entnum = MAX_EDICTS; // entity was removed, disown sound
1283                 }
1284                 else if (cl.entities[ch->entnum].state_current.active)
1285                 {
1286                         dp_model_t *model;
1287                         //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]);
1288                         model = CL_GetModelByIndex(cl.entities[ch->entnum].state_current.modelindex);
1289                         if (model && model->soundfromcenter)
1290                                 VectorMAM(0.5f, cl.entities[ch->entnum].render.mins, 0.5f, cl.entities[ch->entnum].render.maxs, ch->origin);
1291                         else
1292                                 Matrix4x4_OriginFromMatrix(&cl.entities[ch->entnum].render.matrix, ch->origin);
1293                 }
1294         }
1295
1296         mastervol = ch->master_vol;
1297
1298         // Adjust volume of static sounds
1299         if (isstatic)
1300                 mastervol *= snd_staticvolume.value;
1301         else if(!(ch->flags & CHANNELFLAG_FULLVOLUME)) // same as SND_PaintChannel uses
1302         {
1303                 // old legacy separated cvars
1304                 if(ch->entnum >= MAX_EDICTS)
1305                 {
1306                         switch(ch->entchannel)
1307                         {
1308                                 case 0: mastervol *= snd_csqcchannel0volume.value; break;
1309                                 case 1: mastervol *= snd_csqcchannel1volume.value; break;
1310                                 case 2: mastervol *= snd_csqcchannel2volume.value; break;
1311                                 case 3: mastervol *= snd_csqcchannel3volume.value; break;
1312                                 case 4: mastervol *= snd_csqcchannel4volume.value; break;
1313                                 case 5: mastervol *= snd_csqcchannel5volume.value; break;
1314                                 case 6: mastervol *= snd_csqcchannel6volume.value; break;
1315                                 case 7: mastervol *= snd_csqcchannel7volume.value; break;
1316                                 default:                                           break;
1317                         }
1318                 }
1319                 else if(ch->entnum == 0)
1320                 {
1321                         switch(ch->entchannel)
1322                         {
1323                                 case 0: mastervol *= snd_worldchannel0volume.value; break;
1324                                 case 1: mastervol *= snd_worldchannel1volume.value; break;
1325                                 case 2: mastervol *= snd_worldchannel2volume.value; break;
1326                                 case 3: mastervol *= snd_worldchannel3volume.value; break;
1327                                 case 4: mastervol *= snd_worldchannel4volume.value; break;
1328                                 case 5: mastervol *= snd_worldchannel5volume.value; break;
1329                                 case 6: mastervol *= snd_worldchannel6volume.value; break;
1330                                 case 7: mastervol *= snd_worldchannel7volume.value; break;
1331                                 default:                                            break;
1332                         }
1333                 }
1334                 else if(ch->entnum > 0 && ch->entnum <= cl.maxclients)
1335                 {
1336                         switch(ch->entchannel)
1337                         {
1338                                 case 0: mastervol *= snd_playerchannel0volume.value; break;
1339                                 case 1: mastervol *= snd_playerchannel1volume.value; break;
1340                                 case 2: mastervol *= snd_playerchannel2volume.value; break;
1341                                 case 3: mastervol *= snd_playerchannel3volume.value; break;
1342                                 case 4: mastervol *= snd_playerchannel4volume.value; break;
1343                                 case 5: mastervol *= snd_playerchannel5volume.value; break;
1344                                 case 6: mastervol *= snd_playerchannel6volume.value; break;
1345                                 case 7: mastervol *= snd_playerchannel7volume.value; break;
1346                                 default:                                             break;
1347                         }
1348                 }
1349                 else
1350                 {
1351                         switch(ch->entchannel)
1352                         {
1353                                 case 0: mastervol *= snd_entchannel0volume.value; break;
1354                                 case 1: mastervol *= snd_entchannel1volume.value; break;
1355                                 case 2: mastervol *= snd_entchannel2volume.value; break;
1356                                 case 3: mastervol *= snd_entchannel3volume.value; break;
1357                                 case 4: mastervol *= snd_entchannel4volume.value; break;
1358                                 case 5: mastervol *= snd_entchannel5volume.value; break;
1359                                 case 6: mastervol *= snd_entchannel6volume.value; break;
1360                                 case 7: mastervol *= snd_entchannel7volume.value; break;
1361                                 default:                                          break;
1362                         }
1363                 }
1364
1365                 switch(ch->entchannel)
1366                 {
1367                         case 0:  mastervol *= snd_channel0volume.value; break;
1368                         case 1:  mastervol *= snd_channel1volume.value; break;
1369                         case 2:  mastervol *= snd_channel2volume.value; break;
1370                         case 3:  mastervol *= snd_channel3volume.value; break;
1371                         case 4:  mastervol *= snd_channel4volume.value; break;
1372                         case 5:  mastervol *= snd_channel5volume.value; break;
1373                         case 6:  mastervol *= snd_channel6volume.value; break;
1374                         case 7:  mastervol *= snd_channel7volume.value; break;
1375                         default: mastervol *= Cvar_VariableValueOr(va("snd_channel%dvolume", CHAN_ENGINE2CVAR(ch->entchannel)), 1.0); break;
1376                 }
1377         }
1378
1379         // If this channel does not manage its own volume (like CD tracks)
1380         if (!(ch->flags & CHANNELFLAG_FULLVOLUME))
1381                 mastervol *= volume.value;
1382
1383         // clamp HERE to allow to go at most 10dB past mastervolume (before clamping), when mastervolume < -10dB (so relative volumes don't get too messy)
1384         mastervol = bound(0, mastervol, 655360);
1385
1386         // always apply "master"
1387         mastervol *= mastervolume.value;
1388
1389         // add in ReplayGain very late; prevent clipping when close
1390         if(sfx)
1391         if(sfx->volume_peak > 0)
1392         {
1393                 // Replaygain support
1394                 // Con_DPrintf("Setting volume on ReplayGain-enabled track... %f -> ", fvol);
1395                 mastervol *= sfx->volume_mult;
1396                 if(mastervol * sfx->volume_peak > 65536)
1397                         mastervol = 65536 / sfx->volume_peak;
1398                 // Con_DPrintf("%f\n", fvol);
1399         }
1400
1401         // clamp HERE to keep relative volumes of the channels correct
1402         mastervol = bound(0, mastervol, 65536);
1403
1404         // anything coming from the view entity will always be full volume
1405         // LordHavoc: make sounds with ATTN_NONE have no spatialization
1406         if (ch->entnum == cl.viewentity || ch->dist_mult == 0)
1407         {
1408                 ch->prologic_invert = 1;
1409                 if (snd_spatialization_prologic.integer != 0)
1410                 {
1411                         vol = mastervol * snd_speakerlayout.listeners[0].ambientvolume * sqrt(0.5);
1412                         ch->listener_volume[0] = (int)bound(0, vol, 65536);
1413                         vol = mastervol * snd_speakerlayout.listeners[1].ambientvolume * sqrt(0.5);
1414                         ch->listener_volume[1] = (int)bound(0, vol, 65536);
1415                         for (i = 2;i < SND_LISTENERS;i++)
1416                                 ch->listener_volume[i] = 0;
1417                 }
1418                 else
1419                 {
1420                         for (i = 0;i < SND_LISTENERS;i++)
1421                         {
1422                                 vol = mastervol * snd_speakerlayout.listeners[i].ambientvolume;
1423                                 ch->listener_volume[i] = (int)bound(0, vol, 65536);
1424                         }
1425                 }
1426         }
1427         else
1428         {
1429                 // calculate stereo seperation and distance attenuation
1430                 VectorSubtract(listener_origin, ch->origin, source_vec);
1431                 dist = VectorLength(source_vec);
1432                 intensity = mastervol * (1.0 - dist * ch->dist_mult);
1433                 if (intensity > 0)
1434                 {
1435                         qboolean occluded = false;
1436                         if (snd_spatialization_occlusion.integer)
1437                         {
1438                                 if(snd_spatialization_occlusion.integer & 1)
1439                                         if(listener_pvs)
1440                                         {
1441                                                 int cluster = cl.worldmodel->brush.PointInLeaf(cl.worldmodel, ch->origin)->clusterindex;
1442                                                 if(cluster >= 0 && cluster < 8 * listener_pvsbytes && !CHECKPVSBIT(listener_pvs, cluster))
1443                                                         occluded = true;
1444                                         }
1445
1446                                 if(snd_spatialization_occlusion.integer & 2)
1447                                         if(!occluded)
1448                                                 if(cl.worldmodel && cl.worldmodel->brush.TraceLineOfSight && !cl.worldmodel->brush.TraceLineOfSight(cl.worldmodel, listener_origin, ch->origin))
1449                                                         occluded = true;
1450                         }
1451                         if(occluded)
1452                                 intensity *= 0.5;
1453
1454                         ch->prologic_invert = 1;
1455                         if (snd_spatialization_prologic.integer != 0)
1456                         {
1457                                 if (dist == 0)
1458                                         angle_factor = 0.5;
1459                                 else
1460                                 {
1461                                         Matrix4x4_Transform(&listener_basematrix, ch->origin, source_vec);
1462                                         VectorNormalize(source_vec);
1463
1464                                         switch(spatialmethod)
1465                                         {
1466                                                 case SPATIAL_LOG:
1467                                                         if(dist == 0)
1468                                                                 f = spatialmin + spatialdiff * (spatialfactor < 0); // avoid log(0), but do the right thing
1469                                                         else
1470                                                                 f = spatialmin + spatialdiff * bound(0, (log(dist) - spatialoffset) * spatialfactor, 1);
1471                                                         VectorScale(source_vec, f, source_vec);
1472                                                         break;
1473                                                 case SPATIAL_POW:
1474                                                         f = (pow(dist, spatialpower) - spatialoffset) * spatialfactor;
1475                                                         f = spatialmin + spatialdiff * bound(0, f, 1);
1476                                                         VectorScale(source_vec, f, source_vec);
1477                                                         break;
1478                                                 case SPATIAL_THRESH:
1479                                                         f = spatialmin + spatialdiff * (dist < spatialoffset);
1480                                                         VectorScale(source_vec, f, source_vec);
1481                                                         break;
1482                                                 case SPATIAL_NONE:
1483                                                 default:
1484                                                         break;
1485                                         }
1486
1487                                         // 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
1488                                         source_vec[2] = 0;
1489                                         VectorNormalize(source_vec);
1490                                         angle_side = acos(source_vec[0]) / M_PI * 180;  // angle between 0 and 180 degrees
1491                                         angle_front = asin(source_vec[1]) / M_PI * 180; // angle between -90 and 90 degrees
1492                                         if (angle_side > snd_spatialization_prologic_frontangle.value)
1493                                         {
1494                                                 ch->prologic_invert = -1;       // this will cause the right channel to do a 180 degrees phase shift (turning the sound wave upside down),
1495                                                                                                         // but the best would be 90 degrees phase shift left and a -90 degrees phase shift right.
1496                                                 angle_factor = (angle_side - snd_spatialization_prologic_frontangle.value) / (360 - 2 * snd_spatialization_prologic_frontangle.value);
1497                                                 // angle_factor is between 0 and 1 and represents the angle range from the front left, to all the surround speakers (amount may vary,
1498                                                 // 1 in prologic I 2 in prologic II and 3 or 4 in prologic IIx) to the front right speaker.
1499                                                 if (angle_front > 0)
1500                                                         angle_factor = 1 - angle_factor;
1501                                         }
1502                                         else
1503                                                 angle_factor = angle_front / snd_spatialization_prologic_frontangle.value / 2.0 + 0.5;
1504                                                 //angle_factor is between 0 and 1 and represents the angle range from the front left to the center to the front right speaker
1505                                 }
1506
1507                                 vol = intensity * sqrt(angle_factor);
1508                                 ch->listener_volume[0] = (int)bound(0, vol, 65536);
1509                                 vol = intensity * sqrt(1 - angle_factor);
1510                                 ch->listener_volume[1] = (int)bound(0, vol, 65536);
1511                                 for (i = 2;i < SND_LISTENERS;i++)
1512                                         ch->listener_volume[i] = 0;
1513                         }
1514                         else
1515                         {
1516                                 for (i = 0;i < SND_LISTENERS;i++)
1517                                 {
1518                                         Matrix4x4_Transform(&listener_matrix[i], ch->origin, source_vec);
1519                                         VectorNormalize(source_vec);
1520
1521                                         switch(spatialmethod)
1522                                         {
1523                                                 case SPATIAL_LOG:
1524                                                         if(dist == 0)
1525                                                                 f = spatialmin + spatialdiff * (spatialfactor < 0); // avoid log(0), but do the right thing
1526                                                         else
1527                                                                 f = spatialmin + spatialdiff * bound(0, (log(dist) - spatialoffset) * spatialfactor, 1);
1528                                                         VectorScale(source_vec, f, source_vec);
1529                                                         break;
1530                                                 case SPATIAL_POW:
1531                                                         f = (pow(dist, spatialpower) - spatialoffset) * spatialfactor;
1532                                                         f = spatialmin + spatialdiff * bound(0, f, 1);
1533                                                         VectorScale(source_vec, f, source_vec);
1534                                                         break;
1535                                                 case SPATIAL_THRESH:
1536                                                         f = spatialmin + spatialdiff * (dist < spatialoffset);
1537                                                         VectorScale(source_vec, f, source_vec);
1538                                                         break;
1539                                                 case SPATIAL_NONE:
1540                                                 default:
1541                                                         break;
1542                                         }
1543
1544                                         vol = intensity * max(0, source_vec[0] * snd_speakerlayout.listeners[i].dotscale + snd_speakerlayout.listeners[i].dotbias);
1545
1546                                         ch->listener_volume[i] = (int)bound(0, vol, 65536);
1547                                 }
1548                         }
1549                 }
1550                 else
1551                         for (i = 0;i < SND_LISTENERS;i++)
1552                                 ch->listener_volume[i] = 0;
1553         }
1554 }
1555 void SND_Spatialize(channel_t *ch, qboolean isstatic)
1556 {
1557         sfx_t *sfx = ch->sfx;
1558         SND_Spatialize_WithSfx(ch, isstatic, sfx);
1559 }
1560
1561
1562 // =======================================================================
1563 // Start a sound effect
1564 // =======================================================================
1565
1566 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)
1567 {
1568         if (!sfx)
1569         {
1570                 Con_Printf("S_PlaySfxOnChannel called with NULL??\n");
1571                 return;
1572         }
1573
1574         if ((sfx->loopstart < sfx->total_length) || (flags & CHANNELFLAG_FORCELOOP))
1575         {
1576                 if(!snd_startloopingsounds.integer)
1577                         return;
1578         }
1579         else
1580         {
1581                 if(!snd_startnonloopingsounds.integer)
1582                         return;
1583         }
1584
1585         // Initialize the channel
1586         // a crash was reported on an in-use channel, so check here...
1587         if (target_chan->sfx)
1588         {
1589                 int channelindex = (int)(target_chan - channels);
1590                 Con_Printf("S_PlaySfxOnChannel(%s): channel %i already in use??  Clearing.\n", sfx->name, channelindex);
1591                 S_StopChannel (channelindex, true, false);
1592         }
1593         // We MUST set sfx LAST because otherwise we could crash a threaded mixer
1594         // (otherwise we'd have to call SndSys_LockRenderBuffer here)
1595         memset (target_chan, 0, sizeof (*target_chan));
1596         VectorCopy (origin, target_chan->origin);
1597         target_chan->flags = flags;
1598         target_chan->pos = startpos; // start of the sound
1599         target_chan->entnum = entnum;
1600         target_chan->entchannel = entchannel;
1601
1602         // If it's a static sound
1603         if (isstatic)
1604         {
1605                 if (sfx->loopstart >= sfx->total_length && (cls.protocol == PROTOCOL_QUAKE || cls.protocol == PROTOCOL_QUAKEWORLD))
1606                         Con_DPrintf("Quake compatibility warning: Static sound \"%s\" is not looped\n", sfx->name);
1607                 target_chan->dist_mult = attenuation / (64.0f * snd_soundradius.value);
1608         }
1609         else
1610                 target_chan->dist_mult = attenuation / snd_soundradius.value;
1611
1612         // set the listener volumes
1613         S_SetChannelVolume(target_chan - channels, fvol);
1614         SND_Spatialize_WithSfx (target_chan, isstatic, sfx);
1615
1616         // finally, set the sfx pointer, so the channel becomes valid for playback
1617         // and will be noticed by the mixer
1618         target_chan->sfx = sfx;
1619 }
1620
1621
1622 int S_StartSound_StartPosition_Flags (int entnum, int entchannel, sfx_t *sfx, vec3_t origin, float fvol, float attenuation, float startposition, int flags)
1623 {
1624         channel_t *target_chan, *check, *ch;
1625         int             ch_idx, startpos;
1626
1627         if (snd_renderbuffer == NULL || sfx == NULL || nosound.integer)
1628                 return -1;
1629
1630         if(sfx == &changevolume_sfx)
1631         {
1632                 if (!IS_CHAN_SINGLE(entchannel))
1633                         return -1;
1634                 for (ch_idx=NUM_AMBIENTS ; ch_idx < NUM_AMBIENTS + MAX_DYNAMIC_CHANNELS ; ch_idx++)
1635                 {
1636                         ch = &channels[ch_idx];
1637                         if (ch->entnum == entnum && ch->entchannel == entchannel)
1638                         {
1639                                 S_SetChannelVolume(ch_idx, fvol);
1640                                 ch->dist_mult = attenuation / snd_soundradius.value;
1641                                 SND_Spatialize(ch, false);
1642                                 return ch_idx;
1643                         }
1644                 }
1645                 return -1;
1646         }
1647
1648         if (sfx->fetcher == NULL)
1649                 return -1;
1650
1651         // Pick a channel to play on
1652         target_chan = SND_PickChannel(entnum, entchannel);
1653         if (!target_chan)
1654                 return -1;
1655
1656         // if an identical sound has also been started this frame, offset the pos
1657         // a bit to keep it from just making the first one louder
1658         check = &channels[NUM_AMBIENTS];
1659         startpos = (int)(startposition * S_GetSoundRate());
1660         if (startpos == 0)
1661         {
1662                 for (ch_idx=NUM_AMBIENTS ; ch_idx < NUM_AMBIENTS + MAX_DYNAMIC_CHANNELS ; ch_idx++, check++)
1663                 {
1664                         if (check == target_chan)
1665                                 continue;
1666                         if (check->sfx == sfx && check->pos == 0)
1667                         {
1668                                 // use negative pos offset to delay this sound effect
1669                                 startpos = (int)lhrandom(0, -0.1 * snd_renderbuffer->format.speed);
1670                                 break;
1671                         }
1672                 }
1673         }
1674
1675         S_PlaySfxOnChannel (sfx, target_chan, flags, origin, fvol, attenuation, false, entnum, entchannel, startpos);
1676
1677         return (target_chan - channels);
1678 }
1679
1680 int S_StartSound_StartPosition (int entnum, int entchannel, sfx_t *sfx, vec3_t origin, float fvol, float attenuation, float startposition)
1681 {
1682         return S_StartSound_StartPosition_Flags(entnum, entchannel, sfx, origin, fvol, attenuation, startposition, CHANNELFLAG_NONE);
1683 }
1684
1685 int S_StartSound (int entnum, int entchannel, sfx_t *sfx, vec3_t origin, float fvol, float attenuation)
1686 {
1687         return S_StartSound_StartPosition(entnum, entchannel, sfx, origin, fvol, attenuation, 0);
1688 }
1689
1690 void S_StopChannel (unsigned int channel_ind, qboolean lockmutex, qboolean freesfx)
1691 {
1692         channel_t *ch;
1693         sfx_t *sfx;
1694
1695         if (channel_ind >= total_channels)
1696                 return;
1697
1698         // we have to lock an audio mutex to prevent crashes if an audio mixer
1699         // thread is currently mixing this channel
1700         // the SndSys_LockRenderBuffer function uses such a mutex in
1701         // threaded sound backends
1702         if (lockmutex && !simsound)
1703                 SndSys_LockRenderBuffer();
1704         
1705         ch = &channels[channel_ind];
1706         sfx = ch->sfx;
1707         if (ch->sfx != NULL)
1708         {
1709                 if (sfx->fetcher != NULL)
1710                 {
1711                         snd_fetcher_endsb_t fetcher_endsb = sfx->fetcher->endsb;
1712                         if (fetcher_endsb != NULL)
1713                                 fetcher_endsb (ch->fetcher_data);
1714                 }
1715
1716                 ch->fetcher_data = NULL;
1717                 ch->sfx = NULL;
1718         }
1719         if (lockmutex && !simsound)
1720                 SndSys_UnlockRenderBuffer();
1721         if (freesfx)
1722                 S_FreeSfx(sfx, true);
1723 }
1724
1725
1726 qboolean S_SetChannelFlag (unsigned int ch_ind, unsigned int flag, qboolean value)
1727 {
1728         if (ch_ind >= total_channels)
1729                 return false;
1730
1731         if (flag != CHANNELFLAG_FORCELOOP &&
1732                 flag != CHANNELFLAG_PAUSED &&
1733                 flag != CHANNELFLAG_FULLVOLUME &&
1734                 flag != CHANNELFLAG_LOCALSOUND)
1735                 return false;
1736
1737         if (value)
1738                 channels[ch_ind].flags |= flag;
1739         else
1740                 channels[ch_ind].flags &= ~flag;
1741
1742         return true;
1743 }
1744
1745 void S_StopSound(int entnum, int entchannel)
1746 {
1747         unsigned int i;
1748
1749         for (i = 0; i < MAX_DYNAMIC_CHANNELS; i++)
1750                 if (channels[i].entnum == entnum && channels[i].entchannel == entchannel)
1751                 {
1752                         S_StopChannel (i, true, false);
1753                         return;
1754                 }
1755 }
1756
1757 extern void CDAudio_Stop(void);
1758 void S_StopAllSounds (void)
1759 {
1760         unsigned int i;
1761
1762         // TOCHECK: is this test necessary?
1763         if (snd_renderbuffer == NULL)
1764                 return;
1765
1766         // stop CD audio because it may be using a faketrack
1767         CDAudio_Stop();
1768
1769         if (simsound || SndSys_LockRenderBuffer ())
1770         {
1771                 int clear;
1772                 size_t memsize;
1773
1774                 for (i = 0; i < total_channels; i++)
1775                         if (channels[i].sfx)
1776                                 S_StopChannel (i, false, false);
1777
1778                 total_channels = MAX_DYNAMIC_CHANNELS + NUM_AMBIENTS;   // no statics
1779                 memset(channels, 0, MAX_CHANNELS * sizeof(channel_t));
1780
1781                 // Mute the contents of the submittion buffer
1782                 clear = (snd_renderbuffer->format.width == 1) ? 0x80 : 0;
1783                 memsize = snd_renderbuffer->maxframes * snd_renderbuffer->format.width * snd_renderbuffer->format.channels;
1784                 memset(snd_renderbuffer->ring, clear, memsize);
1785
1786                 if (!simsound)
1787                         SndSys_UnlockRenderBuffer ();
1788         }
1789 }
1790
1791 void S_PauseGameSounds (qboolean toggle)
1792 {
1793         unsigned int i;
1794
1795         for (i = 0; i < total_channels; i++)
1796         {
1797                 channel_t *ch;
1798
1799                 ch = &channels[i];
1800                 if (ch->sfx != NULL && ! (ch->flags & CHANNELFLAG_LOCALSOUND))
1801                         S_SetChannelFlag (i, CHANNELFLAG_PAUSED, toggle);
1802         }
1803 }
1804
1805 void S_SetChannelVolume(unsigned int ch_ind, float fvol)
1806 {
1807         channels[ch_ind].master_vol = (int)(fvol * 65536.0f);
1808 }
1809
1810 float S_GetChannelPosition (unsigned int ch_ind)
1811 {
1812         // note: this is NOT accurate yet
1813         int s;
1814         channel_t *ch = &channels[ch_ind];
1815         sfx_t *sfx = ch->sfx;
1816         if (!sfx)
1817                 return -1;
1818
1819         s = ch->pos;
1820         /*
1821         if(!snd_usethreadedmixing)
1822                 s += _snd_mixahead.value * S_GetSoundRate();
1823         */
1824         return (s % sfx->total_length) / (float) S_GetSoundRate();
1825 }
1826
1827 float S_GetEntChannelPosition(int entnum, int entchannel)
1828 {
1829         channel_t *ch;
1830         unsigned int i;
1831
1832         for (i = 0; i < total_channels; i++)
1833         {
1834                 ch = &channels[i];
1835                 if (ch->entnum == entnum && ch->entchannel == entchannel)
1836                         return S_GetChannelPosition(i);
1837         }
1838         return -1; // no playing sound in this channel
1839 }
1840
1841 /*
1842 =================
1843 S_StaticSound
1844 =================
1845 */
1846 void S_StaticSound (sfx_t *sfx, vec3_t origin, float fvol, float attenuation)
1847 {
1848         channel_t       *target_chan;
1849
1850         if (snd_renderbuffer == NULL || sfx == NULL || nosound.integer)
1851                 return;
1852         if (!sfx->fetcher)
1853         {
1854                 Con_Printf ("S_StaticSound: \"%s\" hasn't been precached\n", sfx->name);
1855                 return;
1856         }
1857
1858         if (total_channels == MAX_CHANNELS)
1859         {
1860                 Con_Print("S_StaticSound: total_channels == MAX_CHANNELS\n");
1861                 return;
1862         }
1863
1864         target_chan = &channels[total_channels++];
1865         S_PlaySfxOnChannel (sfx, target_chan, CHANNELFLAG_FORCELOOP, origin, fvol, attenuation, true, 0, 0, 0);
1866 }
1867
1868
1869 /*
1870 ===================
1871 S_UpdateAmbientSounds
1872 ===================
1873 */
1874 void S_UpdateAmbientSounds (void)
1875 {
1876         int                     i;
1877         int                     vol;
1878         int                     ambient_channel;
1879         channel_t       *chan;
1880         unsigned char           ambientlevels[NUM_AMBIENTS];
1881         sfx_t           *sfx;
1882
1883         memset(ambientlevels, 0, sizeof(ambientlevels));
1884         if (cl.worldmodel && cl.worldmodel->brush.AmbientSoundLevelsForPoint)
1885                 cl.worldmodel->brush.AmbientSoundLevelsForPoint(cl.worldmodel, listener_origin, ambientlevels, sizeof(ambientlevels));
1886
1887         // Calc ambient sound levels
1888         for (ambient_channel = 0 ; ambient_channel< NUM_AMBIENTS ; ambient_channel++)
1889         {
1890                 chan = &channels[ambient_channel];
1891                 sfx = chan->sfx; // fetch the volatile variable
1892                 if (sfx == NULL || sfx->fetcher == NULL)
1893                         continue;
1894
1895                 vol = (int)ambientlevels[ambient_channel];
1896                 if (vol < 8)
1897                         vol = 0;
1898                 vol *= 256;
1899
1900                 // Don't adjust volume too fast
1901                 // FIXME: this rounds off to an int each frame, meaning there is little to no fade at extremely high framerates!
1902                 if (cl.time > cl.oldtime)
1903                 {
1904                         if (chan->master_vol < vol)
1905                         {
1906                                 chan->master_vol += (int)((cl.time - cl.oldtime) * 256.0 * ambient_fade.value);
1907                                 if (chan->master_vol > vol)
1908                                         chan->master_vol = vol;
1909                         }
1910                         else if (chan->master_vol > vol)
1911                         {
1912                                 chan->master_vol -= (int)((cl.time - cl.oldtime) * 256.0 * ambient_fade.value);
1913                                 if (chan->master_vol < vol)
1914                                         chan->master_vol = vol;
1915                         }
1916                 }
1917
1918                 if (snd_spatialization_prologic.integer != 0)
1919                 {
1920                         chan->listener_volume[0] = (int)bound(0, chan->master_vol * ambient_level.value * volume.value * mastervolume.value * snd_speakerlayout.listeners[0].ambientvolume * sqrt(0.5), 65536);
1921                         chan->listener_volume[1] = (int)bound(0, chan->master_vol * ambient_level.value * volume.value * mastervolume.value * snd_speakerlayout.listeners[1].ambientvolume * sqrt(0.5), 65536);
1922                         for (i = 2;i < SND_LISTENERS;i++)
1923                                 chan->listener_volume[i] = 0;
1924                 }
1925                 else
1926                 {
1927                         for (i = 0;i < SND_LISTENERS;i++)
1928                                 chan->listener_volume[i] = (int)bound(0, chan->master_vol * ambient_level.value * volume.value * mastervolume.value * snd_speakerlayout.listeners[i].ambientvolume, 65536);
1929                 }
1930         }
1931 }
1932
1933 static void S_PaintAndSubmit (void)
1934 {
1935         unsigned int newsoundtime, paintedtime, endtime, maxtime, usedframes;
1936         int usesoundtimehack;
1937         static int soundtimehack = -1;
1938         static int oldsoundtime = 0;
1939
1940         if (snd_renderbuffer == NULL || nosound.integer)
1941                 return;
1942
1943         // Update sound time
1944         snd_usethreadedmixing = false;
1945         usesoundtimehack = true;
1946         if (cls.timedemo) // SUPER NASTY HACK to mix non-realtime sound for more reliable benchmarking
1947         {
1948                 usesoundtimehack = 1;
1949                 newsoundtime = (unsigned int)((double)cl.mtime[0] * (double)snd_renderbuffer->format.speed);
1950         }
1951         else if (cls.capturevideo.soundrate && !cls.capturevideo.realtime) // SUPER NASTY HACK to record non-realtime sound
1952         {
1953                 usesoundtimehack = 2;
1954                 newsoundtime = (unsigned int)((double)cls.capturevideo.frame * (double)snd_renderbuffer->format.speed / (double)cls.capturevideo.framerate);
1955         }
1956         else if (simsound)
1957         {
1958                 usesoundtimehack = 3;
1959                 newsoundtime = (unsigned int)((realtime - snd_starttime) * (double)snd_renderbuffer->format.speed);
1960         }
1961         else
1962         {
1963                 snd_usethreadedmixing = snd_threaded && !cls.capturevideo.soundrate;
1964                 usesoundtimehack = 0;
1965                 newsoundtime = SndSys_GetSoundTime();
1966         }
1967         // if the soundtimehack state changes we need to reset the soundtime
1968         if (soundtimehack != usesoundtimehack)
1969         {
1970                 snd_renderbuffer->startframe = snd_renderbuffer->endframe = soundtime = newsoundtime;
1971
1972                 // Mute the contents of the submission buffer
1973                 if (simsound || SndSys_LockRenderBuffer ())
1974                 {
1975                         int clear;
1976                         size_t memsize;
1977
1978                         clear = (snd_renderbuffer->format.width == 1) ? 0x80 : 0;
1979                         memsize = snd_renderbuffer->maxframes * snd_renderbuffer->format.width * snd_renderbuffer->format.channels;
1980                         memset(snd_renderbuffer->ring, clear, memsize);
1981
1982                         if (!simsound)
1983                                 SndSys_UnlockRenderBuffer ();
1984                 }
1985         }
1986         soundtimehack = usesoundtimehack;
1987
1988         if (!soundtimehack && snd_blocked > 0)
1989                 return;
1990
1991         if (snd_usethreadedmixing)
1992                 return; // the audio thread will mix its own data
1993
1994         newsoundtime += extrasoundtime;
1995         if (newsoundtime < soundtime)
1996         {
1997                 if ((cls.capturevideo.soundrate != 0) != recording_sound)
1998                 {
1999                         unsigned int additionaltime;
2000
2001                         // add some time to extrasoundtime make newsoundtime higher
2002
2003                         // The extra time must be a multiple of the render buffer size
2004                         // to avoid modifying the current position in the buffer,
2005                         // some modules write directly to a shared (DMA) buffer
2006                         additionaltime = (soundtime - newsoundtime) + snd_renderbuffer->maxframes - 1;
2007                         additionaltime -= additionaltime % snd_renderbuffer->maxframes;
2008
2009                         extrasoundtime += additionaltime;
2010                         newsoundtime += additionaltime;
2011                         Con_DPrintf("S_PaintAndSubmit: new extra sound time = %u\n",
2012                                                 extrasoundtime);
2013                 }
2014                 else if (!soundtimehack)
2015                         Con_Printf("S_PaintAndSubmit: WARNING: newsoundtime < soundtime (%u < %u)\n",
2016                                            newsoundtime, soundtime);
2017         }
2018         soundtime = newsoundtime;
2019         recording_sound = (cls.capturevideo.soundrate != 0);
2020
2021         // Lock submitbuffer
2022         if (!simsound && !SndSys_LockRenderBuffer())
2023         {
2024                 // If the lock failed, stop here
2025                 Con_DPrint(">> S_PaintAndSubmit: SndSys_LockRenderBuffer() failed\n");
2026                 return;
2027         }
2028
2029         // Check to make sure that we haven't overshot
2030         paintedtime = snd_renderbuffer->endframe;
2031         if (paintedtime < soundtime)
2032                 paintedtime = soundtime;
2033
2034         // mix ahead of current position
2035         if (soundtimehack)
2036                 endtime = soundtime + (unsigned int)(_snd_mixahead.value * (float)snd_renderbuffer->format.speed);
2037         else
2038                 endtime = soundtime + (unsigned int)(max(_snd_mixahead.value * (float)snd_renderbuffer->format.speed, min(3 * (soundtime - oldsoundtime), 0.3 * (float)snd_renderbuffer->format.speed)));
2039         usedframes = snd_renderbuffer->endframe - snd_renderbuffer->startframe;
2040         maxtime = paintedtime + snd_renderbuffer->maxframes - usedframes;
2041         endtime = min(endtime, maxtime);
2042
2043         while (paintedtime < endtime)
2044         {
2045                 unsigned int startoffset;
2046                 unsigned int nbframes;
2047
2048                 // see how much we can fit in the paint buffer
2049                 nbframes = endtime - paintedtime;
2050                 // limit to the end of the ring buffer (in case of wrapping)
2051                 startoffset = paintedtime % snd_renderbuffer->maxframes;
2052                 nbframes = min(nbframes, snd_renderbuffer->maxframes - startoffset);
2053
2054                 // mix into the buffer
2055                 S_MixToBuffer(&snd_renderbuffer->ring[startoffset * snd_renderbuffer->format.width * snd_renderbuffer->format.channels], nbframes);
2056
2057                 paintedtime += nbframes;
2058                 snd_renderbuffer->endframe = paintedtime;
2059         }
2060         if (!simsound)
2061                 SndSys_UnlockRenderBuffer();
2062
2063         // Remove outdated samples from the ring buffer, if any
2064         if (snd_renderbuffer->startframe < soundtime)
2065                 snd_renderbuffer->startframe = soundtime;
2066
2067         if (simsound)
2068                 snd_renderbuffer->startframe = snd_renderbuffer->endframe;
2069         else
2070                 SndSys_Submit();
2071
2072         oldsoundtime = soundtime;
2073
2074         cls.soundstats.latency_milliseconds = (snd_renderbuffer->endframe - snd_renderbuffer->startframe) * 1000 / snd_renderbuffer->format.speed;
2075         R_TimeReport("audiomix");
2076 }
2077
2078 /*
2079 ============
2080 S_Update
2081
2082 Called once each time through the main loop
2083 ============
2084 */
2085 void S_Update(const matrix4x4_t *listenermatrix)
2086 {
2087         unsigned int i, j, k;
2088         channel_t *ch, *combine;
2089         matrix4x4_t rotatematrix;
2090
2091         if (snd_renderbuffer == NULL || nosound.integer)
2092                 return;
2093
2094         {
2095                 double mindist_trans, maxdist_trans;
2096
2097                 spatialmin = snd_spatialization_min.value;
2098                 spatialdiff = snd_spatialization_max.value - spatialmin;
2099
2100                 if(snd_spatialization_control.value)
2101                 {
2102                         spatialpower = snd_spatialization_power.value;
2103
2104                         if(spatialpower == 0)
2105                         {
2106                                 spatialmethod = SPATIAL_LOG;
2107                                 mindist_trans = log(max(1, snd_spatialization_min_radius.value));
2108                                 maxdist_trans = log(max(1, snd_spatialization_max_radius.value));
2109                         }
2110                         else
2111                         {
2112                                 spatialmethod = SPATIAL_POW;
2113                                 mindist_trans = pow(snd_spatialization_min_radius.value, spatialpower);
2114                                 maxdist_trans = pow(snd_spatialization_max_radius.value, spatialpower);
2115                         }
2116
2117                         if(mindist_trans - maxdist_trans == 0)
2118                         {
2119                                 spatialmethod = SPATIAL_THRESH;
2120                                 mindist_trans = snd_spatialization_min_radius.value;
2121                         }
2122                         else
2123                         {
2124                                 spatialoffset = mindist_trans;
2125                                 spatialfactor = 1 / (maxdist_trans - mindist_trans);
2126                         }
2127                 }
2128                 else
2129                         spatialmethod = SPATIAL_NONE;
2130
2131         }
2132
2133         // If snd_swapstereo or snd_channellayout has changed, recompute the channel layout
2134         if (current_swapstereo != boolxor(snd_swapstereo.integer, v_flipped.integer) ||
2135                 current_channellayout != snd_channellayout.integer)
2136                 S_SetChannelLayout();
2137
2138         Matrix4x4_Invert_Simple(&listener_basematrix, listenermatrix);
2139         Matrix4x4_OriginFromMatrix(listenermatrix, listener_origin);
2140         if (cl.worldmodel && cl.worldmodel->brush.FatPVS && cl.worldmodel->brush.num_pvsclusterbytes && cl.worldmodel->brush.PointInLeaf)
2141         {
2142                 if(cl.worldmodel->brush.num_pvsclusterbytes != listener_pvsbytes)
2143                 {
2144                         if(listener_pvs)
2145                                 Mem_Free(listener_pvs);
2146                         listener_pvsbytes = cl.worldmodel->brush.num_pvsclusterbytes;
2147                         listener_pvs = (unsigned char *) Mem_Alloc(snd_mempool, listener_pvsbytes);
2148                 }
2149                 cl.worldmodel->brush.FatPVS(cl.worldmodel, listener_origin, 2, listener_pvs, listener_pvsbytes, 0);
2150         }
2151         else
2152         {
2153                 if(listener_pvs)
2154                 {
2155                         Mem_Free(listener_pvs);
2156                         listener_pvs = NULL;
2157                 }
2158                 listener_pvsbytes = 0;
2159         }
2160
2161         // calculate the current matrices
2162         for (j = 0;j < SND_LISTENERS;j++)
2163         {
2164                 Matrix4x4_CreateFromQuakeEntity(&rotatematrix, 0, 0, 0, 0, -snd_speakerlayout.listeners[j].yawangle, 0, 1);
2165                 Matrix4x4_Concat(&listener_matrix[j], &rotatematrix, &listener_basematrix);
2166                 // I think this should now do this:
2167                 //   1. create a rotation matrix for rotating by e.g. -90 degrees CCW
2168                 //      (note: the matrix will rotate the OBJECT, not the VIEWER, so its
2169                 //       angle has to be taken negative)
2170                 //   2. create a transform which first rotates and moves its argument
2171                 //      into the player's view coordinates (using basematrix which is
2172                 //      an inverted "absolute" listener matrix), then applies the
2173                 //      rotation matrix for the ear
2174                 // Isn't Matrix4x4_CreateFromQuakeEntity a bit misleading because this
2175                 // does not actually refer to an entity?
2176         }
2177
2178         // update general area ambient sound sources
2179         S_UpdateAmbientSounds ();
2180
2181         combine = NULL;
2182         R_TimeReport("audioprep");
2183
2184         // update spatialization for static and dynamic sounds
2185         cls.soundstats.totalsounds = 0;
2186         cls.soundstats.mixedsounds = 0;
2187         ch = channels+NUM_AMBIENTS;
2188         for (i=NUM_AMBIENTS ; i<total_channels; i++, ch++)
2189         {
2190                 if (!ch->sfx)
2191                         continue;
2192                 cls.soundstats.totalsounds++;
2193
2194                 // respatialize channel
2195                 SND_Spatialize(ch, i >= MAX_DYNAMIC_CHANNELS + NUM_AMBIENTS);
2196
2197                 // try to combine static sounds with a previous channel of the same
2198                 // sound effect so we don't mix five torches every frame
2199                 if (i > MAX_DYNAMIC_CHANNELS + NUM_AMBIENTS)
2200                 {
2201                         // no need to merge silent channels
2202                         for (j = 0;j < SND_LISTENERS;j++)
2203                                 if (ch->listener_volume[j])
2204                                         break;
2205                         if (j == SND_LISTENERS)
2206                                 continue;
2207                         // if the last combine chosen isn't suitable, find a new one
2208                         if (!(combine && combine != ch && combine->sfx == ch->sfx))
2209                         {
2210                                 // search for one
2211                                 combine = NULL;
2212                                 for (j = MAX_DYNAMIC_CHANNELS + NUM_AMBIENTS;j < i;j++)
2213                                 {
2214                                         if (channels[j].sfx == ch->sfx)
2215                                         {
2216                                                 combine = channels + j;
2217                                                 break;
2218                                         }
2219                                 }
2220                         }
2221                         if (combine && combine != ch && combine->sfx == ch->sfx)
2222                         {
2223                                 for (j = 0;j < SND_LISTENERS;j++)
2224                                 {
2225                                         combine->listener_volume[j] = bound(0, combine->listener_volume[j] + ch->listener_volume[j], 65536);
2226                                         ch->listener_volume[j] = 0;
2227                                 }
2228                         }
2229                 }
2230                 for (k = 0;k < SND_LISTENERS;k++)
2231                         if (ch->listener_volume[k])
2232                                 break;
2233                 if (k < SND_LISTENERS)
2234                         cls.soundstats.mixedsounds++;
2235         }
2236         R_TimeReport("audiospatialize");
2237
2238         sound_spatialized = true;
2239
2240         // debugging output
2241         if (snd_show.integer)
2242                 Con_Printf("----(%u)----\n", cls.soundstats.mixedsounds);
2243
2244         S_PaintAndSubmit();
2245 }
2246
2247 void S_ExtraUpdate (void)
2248 {
2249         if (snd_noextraupdate.integer || !sound_spatialized)
2250                 return;
2251
2252         S_PaintAndSubmit();
2253 }
2254
2255 qboolean S_LocalSound (const char *sound)
2256 {
2257         sfx_t   *sfx;
2258         int             ch_ind;
2259
2260         if (!snd_initialized.integer || nosound.integer)
2261                 return true;
2262
2263         sfx = S_PrecacheSound (sound, true, false);
2264         if (!sfx)
2265         {
2266                 Con_Printf("S_LocalSound: can't precache %s\n", sound);
2267                 return false;
2268         }
2269
2270         // menu sounds must not be freed on level change
2271         sfx->flags |= SFXFLAG_MENUSOUND;
2272
2273         // fun fact: in Quake 1, this used -1 "replace any entity channel",
2274         // which we no longer support anyway
2275         // changed by Black in r4297 "Changed S_LocalSound to play multiple sounds at a time."
2276         ch_ind = S_StartSound (cl.viewentity, 0, sfx, vec3_origin, 1, 0);
2277         if (ch_ind < 0)
2278                 return false;
2279
2280         channels[ch_ind].flags |= CHANNELFLAG_LOCALSOUND;
2281         return true;
2282 }