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[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 "csprogs.h"
27 #include "cl_collision.h"
28 #include "cdaudio.h"
29
30
31 #define SND_MIN_SPEED 8000
32 #define SND_MAX_SPEED 192000
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, 0.2f, 0.2f, 0.5f}, // front left
53                         {1, 315, 0.2f, 0.2f, 0.5f}, // front right
54                         {2, 135, 0.2f, 0.2f, 0.5f}, // rear left
55                         {3, 225, 0.2f, 0.2f, 0.5f}, // rear right
56                         {4, 0, 0.2f, 0.2f, 0.5f}, // 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, 0.2f, 0.2f, 0.5f}, // side left
59                         {7, 180, 0.2f, 0.2f, 0.5f}, // side right
60                 }
61         },
62         {
63                 "surround51", 6,
64                 {
65                         {0, 45, 0.2f, 0.2f, 0.5f}, // front left
66                         {1, 315, 0.2f, 0.2f, 0.5f}, // front right
67                         {2, 135, 0.2f, 0.2f, 0.5f}, // rear left
68                         {3, 225, 0.2f, 0.2f, 0.5f}, // rear right
69                         {4, 0, 0.2f, 0.2f, 0.5f}, // 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, 0.3f, 0.3f, 0.8f}, // front left
81                         {1, 315, 0.3f, 0.3f, 0.8f}, // front right
82                         {2, 135, 0.3f, 0.3f, 0.8f}, // rear left
83                         {3, 225, 0.3f, 0.3f, 0.8f}, // 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, 0.5f, 0.5f, 1}, // side left
96                         {1, 270, 0.5f, 0.5f, 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_attenuation_exponent = {CVAR_SAVE, "snd_attenuation_exponent", "1", "Exponent of (1-radius) in sound attenuation formula"};
169 cvar_t snd_attenuation_decibel = {CVAR_SAVE, "snd_attenuation_decibel", "0", "Decibel sound attenuation per sound radius distance"};
170 cvar_t snd_spatialization_min_radius = {CVAR_SAVE, "snd_spatialization_min_radius", "10000", "use minimum spatialization above to this radius"};
171 cvar_t snd_spatialization_max_radius = {CVAR_SAVE, "snd_spatialization_max_radius", "100", "use maximum spatialization below this radius"};
172 cvar_t snd_spatialization_min = {CVAR_SAVE, "snd_spatialization_min", "0.70", "minimum spatializazion of sounds"};
173 cvar_t snd_spatialization_max = {CVAR_SAVE, "snd_spatialization_max", "0.95", "maximum spatialization of sounds"};
174 cvar_t snd_spatialization_power = {CVAR_SAVE, "snd_spatialization_power", "0", "exponent of the spatialization falloff curve (0: logarithmic)"};
175 cvar_t snd_spatialization_control = {CVAR_SAVE, "snd_spatialization_control", "0", "enable spatialization control (headphone friendly mode)"};
176 cvar_t snd_spatialization_prologic = {CVAR_SAVE, "snd_spatialization_prologic", "0", "use dolby prologic (I, II or IIx) encoding (snd_channels must be 2)"};
177 cvar_t snd_spatialization_prologic_frontangle = {CVAR_SAVE, "snd_spatialization_prologic_frontangle", "30", "the angle between the front speakers and the center speaker"};
178 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"};
179
180 // Cvars declared in snd_main.h (shared with other snd_*.c files)
181 cvar_t _snd_mixahead = {CVAR_SAVE, "_snd_mixahead", "0.15", "how much sound to mix ahead of time"};
182 cvar_t snd_streaming = { CVAR_SAVE, "snd_streaming", "1", "enables keeping compressed ogg sound files compressed, decompressing them only as needed, otherwise they will be decompressed completely at load (may use a lot of memory); when set to 2, streaming is performed even if this would waste memory"};
183 cvar_t snd_streaming_length = { CVAR_SAVE, "snd_streaming_length", "1", "decompress sounds completely if they are less than this play time when snd_streaming is 1"};
184 cvar_t snd_swapstereo = {CVAR_SAVE, "snd_swapstereo", "0", "swaps left/right speakers for old ISA soundblaster cards"};
185 extern cvar_t v_flipped;
186 cvar_t snd_channellayout = {0, "snd_channellayout", "0", "channel layout. Can be 0 (auto - snd_restart needed), 1 (standard layout), or 2 (ALSA layout)"};
187 cvar_t snd_mutewhenidle = {CVAR_SAVE, "snd_mutewhenidle", "1", "whether to disable sound output when game window is inactive"};
188 cvar_t snd_maxchannelvolume = {CVAR_SAVE, "snd_maxchannelvolume", "10", "maximum volume of a single sound"};
189 cvar_t snd_softclip = {CVAR_SAVE, "snd_softclip", "0", "Use soft-clipping. Soft-clipping can make the sound more smooth if very high volume levels are used. Enable this option if the dynamic range of the loudspeakers is very low. WARNING: This feature creates distortion and should be considered a last resort."};
190 //cvar_t snd_softclip = {CVAR_SAVE, "snd_softclip", "0", "Use soft-clipping (when set to 2, use it even if output is floating point). Soft-clipping can make the sound more smooth if very high volume levels are used. Enable this option if the dynamic range of the loudspeakers is very low. WARNING: This feature creates distortion and should be considered a last resort."};
191 cvar_t snd_entchannel0volume = {CVAR_SAVE, "snd_entchannel0volume", "1", "volume multiplier of the auto-allocate entity channel of regular entities (DEPRECATED)"};
192 cvar_t snd_entchannel1volume = {CVAR_SAVE, "snd_entchannel1volume", "1", "volume multiplier of the 1st entity channel of regular entities (DEPRECATED)"};
193 cvar_t snd_entchannel2volume = {CVAR_SAVE, "snd_entchannel2volume", "1", "volume multiplier of the 2nd entity channel of regular entities (DEPRECATED)"};
194 cvar_t snd_entchannel3volume = {CVAR_SAVE, "snd_entchannel3volume", "1", "volume multiplier of the 3rd entity channel of regular entities (DEPRECATED)"};
195 cvar_t snd_entchannel4volume = {CVAR_SAVE, "snd_entchannel4volume", "1", "volume multiplier of the 4th entity channel of regular entities (DEPRECATED)"};
196 cvar_t snd_entchannel5volume = {CVAR_SAVE, "snd_entchannel5volume", "1", "volume multiplier of the 5th entity channel of regular entities (DEPRECATED)"};
197 cvar_t snd_entchannel6volume = {CVAR_SAVE, "snd_entchannel6volume", "1", "volume multiplier of the 6th entity channel of regular entities (DEPRECATED)"};
198 cvar_t snd_entchannel7volume = {CVAR_SAVE, "snd_entchannel7volume", "1", "volume multiplier of the 7th entity channel of regular entities (DEPRECATED)"};
199 cvar_t snd_playerchannel0volume = {CVAR_SAVE, "snd_playerchannel0volume", "1", "volume multiplier of the auto-allocate entity channel of player entities (DEPRECATED)"};
200 cvar_t snd_playerchannel1volume = {CVAR_SAVE, "snd_playerchannel1volume", "1", "volume multiplier of the 1st entity channel of player entities (DEPRECATED)"};
201 cvar_t snd_playerchannel2volume = {CVAR_SAVE, "snd_playerchannel2volume", "1", "volume multiplier of the 2nd entity channel of player entities (DEPRECATED)"};
202 cvar_t snd_playerchannel3volume = {CVAR_SAVE, "snd_playerchannel3volume", "1", "volume multiplier of the 3rd entity channel of player entities (DEPRECATED)"};
203 cvar_t snd_playerchannel4volume = {CVAR_SAVE, "snd_playerchannel4volume", "1", "volume multiplier of the 4th entity channel of player entities (DEPRECATED)"};
204 cvar_t snd_playerchannel5volume = {CVAR_SAVE, "snd_playerchannel5volume", "1", "volume multiplier of the 5th entity channel of player entities (DEPRECATED)"};
205 cvar_t snd_playerchannel6volume = {CVAR_SAVE, "snd_playerchannel6volume", "1", "volume multiplier of the 6th entity channel of player entities (DEPRECATED)"};
206 cvar_t snd_playerchannel7volume = {CVAR_SAVE, "snd_playerchannel7volume", "1", "volume multiplier of the 7th entity channel of player entities (DEPRECATED)"};
207 cvar_t snd_worldchannel0volume = {CVAR_SAVE, "snd_worldchannel0volume", "1", "volume multiplier of the auto-allocate entity channel of the world entity (DEPRECATED)"};
208 cvar_t snd_worldchannel1volume = {CVAR_SAVE, "snd_worldchannel1volume", "1", "volume multiplier of the 1st entity channel of the world entity (DEPRECATED)"};
209 cvar_t snd_worldchannel2volume = {CVAR_SAVE, "snd_worldchannel2volume", "1", "volume multiplier of the 2nd entity channel of the world entity (DEPRECATED)"};
210 cvar_t snd_worldchannel3volume = {CVAR_SAVE, "snd_worldchannel3volume", "1", "volume multiplier of the 3rd entity channel of the world entity (DEPRECATED)"};
211 cvar_t snd_worldchannel4volume = {CVAR_SAVE, "snd_worldchannel4volume", "1", "volume multiplier of the 4th entity channel of the world entity (DEPRECATED)"};
212 cvar_t snd_worldchannel5volume = {CVAR_SAVE, "snd_worldchannel5volume", "1", "volume multiplier of the 5th entity channel of the world entity (DEPRECATED)"};
213 cvar_t snd_worldchannel6volume = {CVAR_SAVE, "snd_worldchannel6volume", "1", "volume multiplier of the 6th entity channel of the world entity (DEPRECATED)"};
214 cvar_t snd_worldchannel7volume = {CVAR_SAVE, "snd_worldchannel7volume", "1", "volume multiplier of the 7th entity channel of the world entity (DEPRECATED)"};
215 cvar_t snd_csqcchannel0volume = {CVAR_SAVE, "snd_csqcchannel0volume", "1", "volume multiplier of the auto-allocate entity channel CSQC entities (DEPRECATED)"};
216 cvar_t snd_csqcchannel1volume = {CVAR_SAVE, "snd_csqcchannel1volume", "1", "volume multiplier of the 1st entity channel of CSQC entities (DEPRECATED)"};
217 cvar_t snd_csqcchannel2volume = {CVAR_SAVE, "snd_csqcchannel2volume", "1", "volume multiplier of the 2nd entity channel of CSQC entities (DEPRECATED)"};
218 cvar_t snd_csqcchannel3volume = {CVAR_SAVE, "snd_csqcchannel3volume", "1", "volume multiplier of the 3rd entity channel of CSQC entities (DEPRECATED)"};
219 cvar_t snd_csqcchannel4volume = {CVAR_SAVE, "snd_csqcchannel4volume", "1", "volume multiplier of the 4th entity channel of CSQC entities (DEPRECATED)"};
220 cvar_t snd_csqcchannel5volume = {CVAR_SAVE, "snd_csqcchannel5volume", "1", "volume multiplier of the 5th entity channel of CSQC entities (DEPRECATED)"};
221 cvar_t snd_csqcchannel6volume = {CVAR_SAVE, "snd_csqcchannel6volume", "1", "volume multiplier of the 6th entity channel of CSQC entities (DEPRECATED)"};
222 cvar_t snd_csqcchannel7volume = {CVAR_SAVE, "snd_csqcchannel7volume", "1", "volume multiplier of the 7th entity channel of CSQC entities (DEPRECATED)"};
223 cvar_t snd_channel0volume = {CVAR_SAVE, "snd_channel0volume", "1", "volume multiplier of the auto-allocate entity channel"};
224 cvar_t snd_channel1volume = {CVAR_SAVE, "snd_channel1volume", "1", "volume multiplier of the 1st entity channel"};
225 cvar_t snd_channel2volume = {CVAR_SAVE, "snd_channel2volume", "1", "volume multiplier of the 2nd entity channel"};
226 cvar_t snd_channel3volume = {CVAR_SAVE, "snd_channel3volume", "1", "volume multiplier of the 3rd entity channel"};
227 cvar_t snd_channel4volume = {CVAR_SAVE, "snd_channel4volume", "1", "volume multiplier of the 4th entity channel"};
228 cvar_t snd_channel5volume = {CVAR_SAVE, "snd_channel5volume", "1", "volume multiplier of the 5th entity channel"};
229 cvar_t snd_channel6volume = {CVAR_SAVE, "snd_channel6volume", "1", "volume multiplier of the 6th entity channel"};
230 cvar_t snd_channel7volume = {CVAR_SAVE, "snd_channel7volume", "1", "volume multiplier of the 7th entity channel"};
231
232 // Local cvars
233 static cvar_t nosound = {0, "nosound", "0", "disables sound"};
234 static cvar_t snd_precache = {0, "snd_precache", "1", "loads sounds before they are used"};
235 static cvar_t ambient_level = {0, "ambient_level", "0.3", "volume of environment noises (water and wind)"};
236 static cvar_t ambient_fade = {0, "ambient_fade", "100", "rate of volume fading when moving from one environment to another"};
237 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"};
238 static cvar_t snd_show = {0, "snd_show", "0", "shows some statistics about sound mixing"};
239
240 // Default sound format is 48KHz, 16-bit, stereo
241 // (48KHz because a lot of onboard sound cards sucks at any other speed)
242 static cvar_t snd_speed = {CVAR_SAVE, "snd_speed", "48000", "sound output frequency, in hertz"};
243 static cvar_t snd_width = {CVAR_SAVE, "snd_width", "2", "sound output precision, in bytes (1 and 2 supported)"};
244 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)"};
245
246 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"};
247 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"};
248
249 // randomization
250 static cvar_t snd_identicalsoundrandomization_time = {0, "snd_identicalsoundrandomization_time", "0.1", "how much seconds to randomly skip (positive) or delay (negative) sounds when multiple identical sounds are started on the same frame"};
251 static cvar_t snd_identicalsoundrandomization_tics = {0, "snd_identicalsoundrandomization_tics", "0", "if nonzero, how many tics to limit sound randomization as defined by snd_identicalsoundrandomization_time"};
252
253 // Ambient sounds
254 static sfx_t* ambient_sfxs [2] = { NULL, NULL };
255 static const char* ambient_names [2] = { "sound/ambience/water1.wav", "sound/ambience/wind2.wav" };
256
257
258 // ====================================================================
259 // Functions
260 // ====================================================================
261
262 void S_FreeSfx (sfx_t *sfx, qboolean force);
263
264 static void S_Play_Common (float fvol, float attenuation)
265 {
266         int i, ch_ind;
267         char name [MAX_QPATH];
268         sfx_t *sfx;
269
270         i = 1;
271         while (i < Cmd_Argc ())
272         {
273                 // Get the name, and appends ".wav" as an extension if there's none
274                 strlcpy (name, Cmd_Argv (i), sizeof (name));
275                 if (!strrchr (name, '.'))
276                         strlcat (name, ".wav", sizeof (name));
277                 i++;
278
279                 // If we need to get the volume from the command line
280                 if (fvol == -1.0f)
281                 {
282                         fvol = atof (Cmd_Argv (i));
283                         i++;
284                 }
285
286                 sfx = S_PrecacheSound (name, true, true);
287                 if (sfx)
288                 {
289                         ch_ind = S_StartSound (-1, 0, sfx, listener_origin, fvol, attenuation);
290
291                         // Free the sfx if the file didn't exist
292                         if (!sfx->fetcher)
293                                 S_FreeSfx (sfx, false);
294                         else
295                                 channels[ch_ind].flags |= CHANNELFLAG_LOCALSOUND;
296                 }
297         }
298 }
299
300 static void S_Play_f(void)
301 {
302         S_Play_Common (1.0f, 1.0f);
303 }
304
305 static void S_Play2_f(void)
306 {
307         S_Play_Common (1.0f, 0.0f);
308 }
309
310 static void S_PlayVol_f(void)
311 {
312         S_Play_Common (-1.0f, 0.0f);
313 }
314
315 static void S_SoundList_f (void)
316 {
317         unsigned int i;
318         sfx_t *sfx;
319         unsigned int total;
320
321         total = 0;
322         for (sfx = known_sfx, i = 0; sfx != NULL; sfx = sfx->next, i++)
323         {
324                 if (sfx->fetcher != NULL)
325                 {
326                         unsigned int size;
327
328                         size = (unsigned int)sfx->memsize;
329                         Con_Printf ("%c%c%c(%5iHz %2db %6s) %8i : %s\n",
330                                                 (sfx->loopstart < sfx->total_length) ? 'L' : ' ',
331                                                 (sfx->flags & SFXFLAG_STREAMED) ? 'S' : ' ',
332                                                 (sfx->flags & SFXFLAG_MENUSOUND) ? 'P' : ' ',
333                                                 sfx->format.speed,
334                                                 sfx->format.width * 8,
335                                                 (sfx->format.channels == 1) ? "mono" : "stereo",
336                                                 size,
337                                                 sfx->name);
338                         total += size;
339                 }
340                 else
341                         Con_Printf ("    (  unknown  ) unloaded : %s\n", sfx->name);
342         }
343         Con_Printf("Total resident: %i\n", total);
344 }
345
346
347 static void S_SoundInfo_f(void)
348 {
349         if (snd_renderbuffer == NULL)
350         {
351                 Con_Print("sound system not started\n");
352                 return;
353         }
354
355         Con_Printf("%5d speakers\n", snd_renderbuffer->format.channels);
356         Con_Printf("%5d frames\n", snd_renderbuffer->maxframes);
357         Con_Printf("%5d samplebits\n", snd_renderbuffer->format.width * 8);
358         Con_Printf("%5d speed\n", snd_renderbuffer->format.speed);
359         Con_Printf("%5u total_channels\n", total_channels);
360 }
361
362
363 int S_GetSoundRate(void)
364 {
365         return snd_renderbuffer ? snd_renderbuffer->format.speed : 0;
366 }
367
368 int S_GetSoundChannels(void)
369 {
370         return snd_renderbuffer ? snd_renderbuffer->format.channels : 0;
371 }
372
373
374 static qboolean S_ChooseCheaperFormat (snd_format_t* format, qboolean fixed_speed, qboolean fixed_width, qboolean fixed_channels)
375 {
376         static const snd_format_t thresholds [] =
377         {
378                 // speed                        width                   channels
379                 { SND_MIN_SPEED,        SND_MIN_WIDTH,  SND_MIN_CHANNELS },
380                 { 11025,                        1,                              2 },
381                 { 22050,                        2,                              2 },
382                 { 44100,                        2,                              2 },
383                 { 48000,                        2,                              6 },
384                 { 96000,                        2,                              6 },
385                 { SND_MAX_SPEED,        SND_MAX_WIDTH,  SND_MAX_CHANNELS },
386         };
387         const unsigned int nb_thresholds = sizeof(thresholds) / sizeof(thresholds[0]);
388         unsigned int speed_level, width_level, channels_level;
389
390         // If we have reached the minimum values, there's nothing more we can do
391         if ((format->speed == thresholds[0].speed || fixed_speed) &&
392                 (format->width == thresholds[0].width || fixed_width) &&
393                 (format->channels == thresholds[0].channels || fixed_channels))
394                 return false;
395
396         // Check the min and max values
397         #define CHECK_BOUNDARIES(param)                                                         \
398         if (format->param < thresholds[0].param)                                        \
399         {                                                                                                                       \
400                 format->param = thresholds[0].param;                                    \
401                 return true;                                                                                    \
402         }                                                                                                                       \
403         if (format->param > thresholds[nb_thresholds - 1].param)        \
404         {                                                                                                                       \
405                 format->param = thresholds[nb_thresholds - 1].param;    \
406                 return true;                                                                                    \
407         }
408         CHECK_BOUNDARIES(speed);
409         CHECK_BOUNDARIES(width);
410         CHECK_BOUNDARIES(channels);
411         #undef CHECK_BOUNDARIES
412
413         // Find the level of each parameter
414         #define FIND_LEVEL(param)                                                                       \
415         param##_level = 0;                                                                                      \
416         while (param##_level < nb_thresholds - 1)                                       \
417         {                                                                                                                       \
418                 if (format->param <= thresholds[param##_level].param)   \
419                         break;                                                                                          \
420                                                                                                                                 \
421                 param##_level++;                                                                                \
422         }
423         FIND_LEVEL(speed);
424         FIND_LEVEL(width);
425         FIND_LEVEL(channels);
426         #undef FIND_LEVEL
427
428         // Decrease the parameter with the highest level to the previous level
429         if (channels_level >= speed_level && channels_level >= width_level && !fixed_channels)
430         {
431                 format->channels = thresholds[channels_level - 1].channels;
432                 return true;
433         }
434         if (speed_level >= width_level && !fixed_speed)
435         {
436                 format->speed = thresholds[speed_level - 1].speed;
437                 return true;
438         }
439
440         format->width = thresholds[width_level - 1].width;
441         return true;
442 }
443
444
445 #define SWAP_LISTENERS(l1, l2, tmpl) { tmpl = (l1); (l1) = (l2); (l2) = tmpl; }
446
447 static void S_SetChannelLayout (void)
448 {
449         unsigned int i;
450         listener_t swaplistener;
451         listener_t *listeners;
452         int layout;
453
454         for (i = 0; i < SND_SPEAKERLAYOUTS; i++)
455                 if (snd_speakerlayouts[i].channels == snd_renderbuffer->format.channels)
456                         break;
457         if (i >= SND_SPEAKERLAYOUTS)
458         {
459                 Con_Printf("S_SetChannelLayout: can't find the speaker layout for %hu channels. Defaulting to mono output\n",
460                                    snd_renderbuffer->format.channels);
461                 i = SND_SPEAKERLAYOUTS - 1;
462         }
463
464         snd_speakerlayout = snd_speakerlayouts[i];
465         listeners = snd_speakerlayout.listeners;
466
467         // Swap the left and right channels if snd_swapstereo is set
468         if (boolxor(snd_swapstereo.integer, v_flipped.integer))
469         {
470                 switch (snd_speakerlayout.channels)
471                 {
472                         case 8:
473                                 SWAP_LISTENERS(listeners[6], listeners[7], swaplistener);
474                                 // no break
475                         case 4:
476                         case 6:
477                                 SWAP_LISTENERS(listeners[2], listeners[3], swaplistener);
478                                 // no break
479                         case 2:
480                                 SWAP_LISTENERS(listeners[0], listeners[1], swaplistener);
481                                 break;
482
483                         default:
484                         case 1:
485                                 // Nothing to do
486                                 break;
487                 }
488         }
489
490         // Sanity check
491         if (snd_channellayout.integer < SND_CHANNELLAYOUT_AUTO ||
492                 snd_channellayout.integer > SND_CHANNELLAYOUT_ALSA)
493                 Cvar_SetValueQuick (&snd_channellayout, SND_CHANNELLAYOUT_STANDARD);
494
495         if (snd_channellayout.integer == SND_CHANNELLAYOUT_AUTO)
496         {
497                 // If we're in the sound engine initialization
498                 if (current_channellayout_used == SND_CHANNELLAYOUT_AUTO)
499                 {
500                         layout = SND_CHANNELLAYOUT_STANDARD;
501                         Cvar_SetValueQuick (&snd_channellayout, layout);
502                 }
503                 else
504                         layout = current_channellayout_used;
505         }
506         else
507                 layout = snd_channellayout.integer;
508
509         // Convert our layout (= ALSA) to the standard layout if necessary
510         if (snd_speakerlayout.channels == 6 || snd_speakerlayout.channels == 8)
511         {
512                 if (layout == SND_CHANNELLAYOUT_STANDARD)
513                 {
514                         SWAP_LISTENERS(listeners[2], listeners[4], swaplistener);
515                         SWAP_LISTENERS(listeners[3], listeners[5], swaplistener);
516                 }
517
518                 Con_Printf("S_SetChannelLayout: using %s speaker layout for 3D sound\n",
519                                    (layout == SND_CHANNELLAYOUT_ALSA) ? "ALSA" : "standard");
520         }
521
522         current_swapstereo = boolxor(snd_swapstereo.integer, v_flipped.integer);
523         current_channellayout = snd_channellayout.integer;
524         current_channellayout_used = layout;
525 }
526
527
528 void S_Startup (void)
529 {
530         qboolean fixed_speed, fixed_width, fixed_channels;
531         snd_format_t chosen_fmt;
532         static snd_format_t prev_render_format = {0, 0, 0};
533         char* env;
534 #if _MSC_VER >= 1400
535         size_t envlen;
536 #endif
537         int i;
538
539         if (!snd_initialized.integer)
540                 return;
541
542         fixed_speed = false;
543         fixed_width = false;
544         fixed_channels = false;
545
546         // Get the starting sound format from the cvars
547         chosen_fmt.speed = snd_speed.integer;
548         chosen_fmt.width = snd_width.integer;
549         chosen_fmt.channels = snd_channels.integer;
550
551         // Check the environment variables to see if the player wants a particular sound format
552 #if _MSC_VER >= 1400
553         _dupenv_s(&env, &envlen, "QUAKE_SOUND_CHANNELS");
554 #else
555         env = getenv("QUAKE_SOUND_CHANNELS");
556 #endif
557         if (env != NULL)
558         {
559                 chosen_fmt.channels = atoi (env);
560 #if _MSC_VER >= 1400
561                 free(env);
562 #endif
563                 fixed_channels = true;
564         }
565 #if _MSC_VER >= 1400
566         _dupenv_s(&env, &envlen, "QUAKE_SOUND_SPEED");
567 #else
568         env = getenv("QUAKE_SOUND_SPEED");
569 #endif
570         if (env != NULL)
571         {
572                 chosen_fmt.speed = atoi (env);
573 #if _MSC_VER >= 1400
574                 free(env);
575 #endif
576                 fixed_speed = true;
577         }
578 #if _MSC_VER >= 1400
579         _dupenv_s(&env, &envlen, "QUAKE_SOUND_SAMPLEBITS");
580 #else
581         env = getenv("QUAKE_SOUND_SAMPLEBITS");
582 #endif
583         if (env != NULL)
584         {
585                 chosen_fmt.width = atoi (env) / 8;
586 #if _MSC_VER >= 1400
587                 free(env);
588 #endif
589                 fixed_width = true;
590         }
591
592         // Parse the command line to see if the player wants a particular sound format
593 // COMMANDLINEOPTION: Sound: -sndquad sets sound output to 4 channel surround
594         if (COM_CheckParm ("-sndquad") != 0)
595         {
596                 chosen_fmt.channels = 4;
597                 fixed_channels = true;
598         }
599 // COMMANDLINEOPTION: Sound: -sndstereo sets sound output to stereo
600         else if (COM_CheckParm ("-sndstereo") != 0)
601         {
602                 chosen_fmt.channels = 2;
603                 fixed_channels = true;
604         }
605 // COMMANDLINEOPTION: Sound: -sndmono sets sound output to mono
606         else if (COM_CheckParm ("-sndmono") != 0)
607         {
608                 chosen_fmt.channels = 1;
609                 fixed_channels = true;
610         }
611 // COMMANDLINEOPTION: Sound: -sndspeed <hz> chooses sound output rate (supported values are 48000, 44100, 32000, 24000, 22050, 16000, 11025 (quake), 8000)
612         i = COM_CheckParm ("-sndspeed");
613         if (0 < i && i < com_argc - 1)
614         {
615                 chosen_fmt.speed = atoi (com_argv[i + 1]);
616                 fixed_speed = true;
617         }
618 // COMMANDLINEOPTION: Sound: -sndbits <bits> chooses 8 bit or 16 bit sound output
619         i = COM_CheckParm ("-sndbits");
620         if (0 < i && i < com_argc - 1)
621         {
622                 chosen_fmt.width = atoi (com_argv[i + 1]) / 8;
623                 fixed_width = true;
624         }
625
626 #if 0
627         // LordHavoc: now you can with the resampler...
628         // You can't change sound speed after start time (not yet supported)
629         if (prev_render_format.speed != 0)
630         {
631                 fixed_speed = true;
632                 if (chosen_fmt.speed != prev_render_format.speed)
633                 {
634                         Con_Printf("S_Startup: sound speed has changed! This is NOT supported yet. Falling back to previous speed (%u Hz)\n",
635                                            prev_render_format.speed);
636                         chosen_fmt.speed = prev_render_format.speed;
637                 }
638         }
639 #endif
640
641         // Sanity checks
642         if (chosen_fmt.speed < SND_MIN_SPEED)
643         {
644                 chosen_fmt.speed = SND_MIN_SPEED;
645                 fixed_speed = false;
646         }
647         else if (chosen_fmt.speed > SND_MAX_SPEED)
648         {
649                 chosen_fmt.speed = SND_MAX_SPEED;
650                 fixed_speed = false;
651         }
652
653         if (chosen_fmt.width < SND_MIN_WIDTH)
654         {
655                 chosen_fmt.width = SND_MIN_WIDTH;
656                 fixed_width = false;
657         }
658         else if (chosen_fmt.width > SND_MAX_WIDTH)
659         {
660                 chosen_fmt.width = SND_MAX_WIDTH;
661                 fixed_width = false;
662         }
663
664         if (chosen_fmt.channels < SND_MIN_CHANNELS)
665         {
666                 chosen_fmt.channels = SND_MIN_CHANNELS;
667                 fixed_channels = false;
668         }
669         else if (chosen_fmt.channels > SND_MAX_CHANNELS)
670         {
671                 chosen_fmt.channels = SND_MAX_CHANNELS;
672                 fixed_channels = false;
673         }
674
675         // create the sound buffer used for sumitting the samples to the plaform-dependent module
676         if (!simsound)
677         {
678                 snd_format_t suggest_fmt;
679                 qboolean accepted;
680
681                 accepted = false;
682                 do
683                 {
684                         Con_Printf("S_Startup: initializing sound output format: %dHz, %d bit, %d channels...\n",
685                                                 chosen_fmt.speed, chosen_fmt.width * 8,
686                                                 chosen_fmt.channels);
687
688                         memset(&suggest_fmt, 0, sizeof(suggest_fmt));
689                         accepted = SndSys_Init(&chosen_fmt, &suggest_fmt);
690
691                         if (!accepted)
692                         {
693                                 Con_Printf("S_Startup: sound output initialization FAILED\n");
694
695                                 // If the module is suggesting another one
696                                 if (suggest_fmt.speed != 0)
697                                 {
698                                         memcpy(&chosen_fmt, &suggest_fmt, sizeof(chosen_fmt));
699                                         Con_Printf ("           Driver has suggested %dHz, %d bit, %d channels. Retrying...\n",
700                                                                 suggest_fmt.speed, suggest_fmt.width * 8,
701                                                                 suggest_fmt.channels);
702                                 }
703                                 // Else, try to find a less resource-demanding format
704                                 else if (!S_ChooseCheaperFormat (&chosen_fmt, fixed_speed, fixed_width, fixed_channels))
705                                         break;
706                         }
707                 } while (!accepted);
708
709                 // If we haven't found a suitable format
710                 if (!accepted)
711                 {
712                         Con_Print("S_Startup: SndSys_Init failed.\n");
713                         sound_spatialized = false;
714                         return;
715                 }
716         }
717         else
718         {
719                 snd_renderbuffer = Snd_CreateRingBuffer(&chosen_fmt, 0, NULL);
720                 Con_Print ("S_Startup: simulating sound output\n");
721         }
722
723         memcpy(&prev_render_format, &snd_renderbuffer->format, sizeof(prev_render_format));
724         Con_Printf("Sound format: %dHz, %d channels, %d bits per sample\n",
725                            chosen_fmt.speed, chosen_fmt.channels, chosen_fmt.width * 8);
726
727         // Update the cvars
728         if (snd_speed.integer != (int)chosen_fmt.speed)
729                 Cvar_SetValueQuick(&snd_speed, chosen_fmt.speed);
730         if (snd_width.integer != chosen_fmt.width)
731                 Cvar_SetValueQuick(&snd_width, chosen_fmt.width);
732         if (snd_channels.integer != chosen_fmt.channels)
733                 Cvar_SetValueQuick(&snd_channels, chosen_fmt.channels);
734
735         current_channellayout_used = SND_CHANNELLAYOUT_AUTO;
736         S_SetChannelLayout();
737
738         snd_starttime = realtime;
739
740         // If the sound module has already run, add an extra time to make sure
741         // the sound time doesn't decrease, to not confuse playing SFXs
742         if (oldpaintedtime != 0)
743         {
744                 // The extra time must be a multiple of the render buffer size
745                 // to avoid modifying the current position in the buffer,
746                 // some modules write directly to a shared (DMA) buffer
747                 extrasoundtime = oldpaintedtime + snd_renderbuffer->maxframes - 1;
748                 extrasoundtime -= extrasoundtime % snd_renderbuffer->maxframes;
749                 Con_Printf("S_Startup: extra sound time = %u\n", extrasoundtime);
750
751                 soundtime = extrasoundtime;
752         }
753         else
754                 extrasoundtime = 0;
755         snd_renderbuffer->startframe = soundtime;
756         snd_renderbuffer->endframe = soundtime;
757         recording_sound = false;
758 }
759
760 void S_Shutdown(void)
761 {
762         if (snd_renderbuffer == NULL)
763                 return;
764
765         oldpaintedtime = snd_renderbuffer->endframe;
766
767         if (simsound)
768         {
769                 Mem_Free(snd_renderbuffer->ring);
770                 Mem_Free(snd_renderbuffer);
771                 snd_renderbuffer = NULL;
772         }
773         else
774                 SndSys_Shutdown();
775
776         sound_spatialized = false;
777 }
778
779 static void S_Restart_f(void)
780 {
781         // NOTE: we can't free all sounds if we are running a map (this frees sfx_t that are still referenced by precaches)
782         // So, refuse to do this if we are connected.
783         if(cls.state == ca_connected)
784         {
785                 Con_Printf("snd_restart would wreak havoc if you do that while connected!\n");
786                 return;
787         }
788
789         S_Shutdown();
790         S_Startup();
791 }
792
793 /*
794 ================
795 S_Init
796 ================
797 */
798 void S_Init(void)
799 {
800         Cvar_RegisterVariable(&volume);
801         Cvar_RegisterVariable(&bgmvolume);
802         Cvar_RegisterVariable(&mastervolume);
803         Cvar_RegisterVariable(&snd_staticvolume);
804         Cvar_RegisterVariable(&snd_entchannel0volume);
805         Cvar_RegisterVariable(&snd_entchannel1volume);
806         Cvar_RegisterVariable(&snd_entchannel2volume);
807         Cvar_RegisterVariable(&snd_entchannel3volume);
808         Cvar_RegisterVariable(&snd_entchannel4volume);
809         Cvar_RegisterVariable(&snd_entchannel5volume);
810         Cvar_RegisterVariable(&snd_entchannel6volume);
811         Cvar_RegisterVariable(&snd_entchannel7volume);
812         Cvar_RegisterVariable(&snd_worldchannel0volume);
813         Cvar_RegisterVariable(&snd_worldchannel1volume);
814         Cvar_RegisterVariable(&snd_worldchannel2volume);
815         Cvar_RegisterVariable(&snd_worldchannel3volume);
816         Cvar_RegisterVariable(&snd_worldchannel4volume);
817         Cvar_RegisterVariable(&snd_worldchannel5volume);
818         Cvar_RegisterVariable(&snd_worldchannel6volume);
819         Cvar_RegisterVariable(&snd_worldchannel7volume);
820         Cvar_RegisterVariable(&snd_playerchannel0volume);
821         Cvar_RegisterVariable(&snd_playerchannel1volume);
822         Cvar_RegisterVariable(&snd_playerchannel2volume);
823         Cvar_RegisterVariable(&snd_playerchannel3volume);
824         Cvar_RegisterVariable(&snd_playerchannel4volume);
825         Cvar_RegisterVariable(&snd_playerchannel5volume);
826         Cvar_RegisterVariable(&snd_playerchannel6volume);
827         Cvar_RegisterVariable(&snd_playerchannel7volume);
828         Cvar_RegisterVariable(&snd_csqcchannel0volume);
829         Cvar_RegisterVariable(&snd_csqcchannel1volume);
830         Cvar_RegisterVariable(&snd_csqcchannel2volume);
831         Cvar_RegisterVariable(&snd_csqcchannel3volume);
832         Cvar_RegisterVariable(&snd_csqcchannel4volume);
833         Cvar_RegisterVariable(&snd_csqcchannel5volume);
834         Cvar_RegisterVariable(&snd_csqcchannel6volume);
835         Cvar_RegisterVariable(&snd_csqcchannel7volume);
836         Cvar_RegisterVariable(&snd_channel0volume);
837         Cvar_RegisterVariable(&snd_channel1volume);
838         Cvar_RegisterVariable(&snd_channel2volume);
839         Cvar_RegisterVariable(&snd_channel3volume);
840         Cvar_RegisterVariable(&snd_channel4volume);
841         Cvar_RegisterVariable(&snd_channel5volume);
842         Cvar_RegisterVariable(&snd_channel6volume);
843         Cvar_RegisterVariable(&snd_channel7volume);
844
845         Cvar_RegisterVariable(&snd_attenuation_exponent);
846         Cvar_RegisterVariable(&snd_attenuation_decibel);
847
848         Cvar_RegisterVariable(&snd_spatialization_min_radius);
849         Cvar_RegisterVariable(&snd_spatialization_max_radius);
850         Cvar_RegisterVariable(&snd_spatialization_min);
851         Cvar_RegisterVariable(&snd_spatialization_max);
852         Cvar_RegisterVariable(&snd_spatialization_power);
853         Cvar_RegisterVariable(&snd_spatialization_control);
854         Cvar_RegisterVariable(&snd_spatialization_occlusion);
855         Cvar_RegisterVariable(&snd_spatialization_prologic);
856         Cvar_RegisterVariable(&snd_spatialization_prologic_frontangle);
857
858         Cvar_RegisterVariable(&snd_speed);
859         Cvar_RegisterVariable(&snd_width);
860         Cvar_RegisterVariable(&snd_channels);
861         Cvar_RegisterVariable(&snd_mutewhenidle);
862         Cvar_RegisterVariable(&snd_maxchannelvolume);
863         Cvar_RegisterVariable(&snd_softclip);
864
865         Cvar_RegisterVariable(&snd_startloopingsounds);
866         Cvar_RegisterVariable(&snd_startnonloopingsounds);
867
868         Cvar_RegisterVariable(&snd_identicalsoundrandomization_time);
869         Cvar_RegisterVariable(&snd_identicalsoundrandomization_tics);
870
871 // COMMANDLINEOPTION: Sound: -nosound disables sound (including CD audio)
872         if (COM_CheckParm("-nosound"))
873         {
874                 // dummy out Play and Play2 because mods stuffcmd that
875                 Cmd_AddCommand("play", Host_NoOperation_f, "does nothing because -nosound was specified");
876                 Cmd_AddCommand("play2", Host_NoOperation_f, "does nothing because -nosound was specified");
877                 return;
878         }
879
880         snd_mempool = Mem_AllocPool("sound", 0, NULL);
881
882 // COMMANDLINEOPTION: Sound: -simsound runs sound mixing but with no output
883         if (COM_CheckParm("-simsound"))
884                 simsound = true;
885
886         Cmd_AddCommand("play", S_Play_f, "play a sound at your current location (not heard by anyone else)");
887         Cmd_AddCommand("play2", S_Play2_f, "play a sound globally throughout the level (not heard by anyone else)");
888         Cmd_AddCommand("playvol", S_PlayVol_f, "play a sound at the specified volume level at your current location (not heard by anyone else)");
889         Cmd_AddCommand("stopsound", S_StopAllSounds, "silence");
890         Cmd_AddCommand("soundlist", S_SoundList_f, "list loaded sounds");
891         Cmd_AddCommand("soundinfo", S_SoundInfo_f, "print sound system information (such as channels and speed)");
892         Cmd_AddCommand("snd_restart", S_Restart_f, "restart sound system");
893         Cmd_AddCommand("snd_unloadallsounds", S_UnloadAllSounds_f, "unload all sound files");
894
895         Cvar_RegisterVariable(&nosound);
896         Cvar_RegisterVariable(&snd_precache);
897         Cvar_RegisterVariable(&snd_initialized);
898         Cvar_RegisterVariable(&snd_streaming);
899         Cvar_RegisterVariable(&snd_streaming_length);
900         Cvar_RegisterVariable(&ambient_level);
901         Cvar_RegisterVariable(&ambient_fade);
902         Cvar_RegisterVariable(&snd_noextraupdate);
903         Cvar_RegisterVariable(&snd_show);
904         Cvar_RegisterVariable(&_snd_mixahead);
905         Cvar_RegisterVariable(&snd_swapstereo); // for people with backwards sound wiring
906         Cvar_RegisterVariable(&snd_channellayout);
907         Cvar_RegisterVariable(&snd_soundradius);
908
909         Cvar_SetValueQuick(&snd_initialized, true);
910
911         known_sfx = NULL;
912
913         total_channels = MAX_DYNAMIC_CHANNELS + NUM_AMBIENTS;   // no statics
914         memset(channels, 0, MAX_CHANNELS * sizeof(channel_t));
915
916         OGG_OpenLibrary ();
917 }
918
919
920 /*
921 ================
922 S_Terminate
923
924 Shutdown and free all resources
925 ================
926 */
927 void S_Terminate (void)
928 {
929         S_Shutdown ();
930         OGG_CloseLibrary ();
931
932         // Free all SFXs
933         while (known_sfx != NULL)
934                 S_FreeSfx (known_sfx, true);
935
936         Cvar_SetValueQuick (&snd_initialized, false);
937         Mem_FreePool (&snd_mempool);
938 }
939
940
941 /*
942 ==================
943 S_UnloadAllSounds_f
944 ==================
945 */
946 void S_UnloadAllSounds_f (void)
947 {
948         int i;
949
950         // NOTE: we can't free all sounds if we are running a map (this frees sfx_t that are still referenced by precaches)
951         // So, refuse to do this if we are connected.
952         if(cls.state == ca_connected)
953         {
954                 Con_Printf("snd_unloadallsounds would wreak havoc if you do that while connected!\n");
955                 return;
956         }
957
958         // stop any active sounds
959         S_StopAllSounds();
960
961         // because the ambient sounds will be freed, clear the pointers
962         for (i = 0;i < (int)sizeof (ambient_sfxs) / (int)sizeof (ambient_sfxs[0]);i++)
963                 ambient_sfxs[i] = NULL;
964
965         // now free all sounds
966         while (known_sfx != NULL)
967                 S_FreeSfx (known_sfx, true);
968 }
969
970
971 /*
972 ==================
973 S_FindName
974 ==================
975 */
976 sfx_t changevolume_sfx = {""};
977 sfx_t *S_FindName (const char *name)
978 {
979         sfx_t *sfx;
980
981         if (!snd_initialized.integer)
982                 return NULL;
983
984         if(!strcmp(name, changevolume_sfx.name))
985                 return &changevolume_sfx;
986
987         if (strlen (name) >= sizeof (sfx->name))
988         {
989                 Con_Printf ("S_FindName: sound name too long (%s)\n", name);
990                 return NULL;
991         }
992
993         // Look for this sound in the list of known sfx
994         // TODO: hash table search?
995         for (sfx = known_sfx; sfx != NULL; sfx = sfx->next)
996                 if(!strcmp (sfx->name, name))
997                         return sfx;
998
999         // check for # in the beginning, try lookup by soundindex
1000         if (name[0] == '#' && name[1])
1001         {
1002                 int soundindex = atoi(name + 1);
1003                 if (soundindex > 0 && soundindex < MAX_SOUNDS)
1004                         if (cl.sound_precache[soundindex]->name[0])
1005                                 return cl.sound_precache[soundindex];
1006         }
1007
1008         // Add a sfx_t struct for this sound
1009         sfx = (sfx_t *)Mem_Alloc (snd_mempool, sizeof (*sfx));
1010         memset (sfx, 0, sizeof(*sfx));
1011         strlcpy (sfx->name, name, sizeof (sfx->name));
1012         sfx->memsize = sizeof(*sfx);
1013         sfx->next = known_sfx;
1014         known_sfx = sfx;
1015
1016         return sfx;
1017 }
1018
1019
1020 /*
1021 ==================
1022 S_FreeSfx
1023 ==================
1024 */
1025 void S_FreeSfx (sfx_t *sfx, qboolean force)
1026 {
1027         unsigned int i;
1028
1029         // Do not free a precached sound during purge
1030         if (!force && (sfx->flags & (SFXFLAG_LEVELSOUND | SFXFLAG_MENUSOUND)))
1031                 return;
1032
1033         if (developer_loading.integer)
1034                 Con_Printf ("unloading sound %s\n", sfx->name);
1035
1036         // Remove it from the list of known sfx
1037         if (sfx == known_sfx)
1038                 known_sfx = known_sfx->next;
1039         else
1040         {
1041                 sfx_t *prev_sfx;
1042
1043                 for (prev_sfx = known_sfx; prev_sfx != NULL; prev_sfx = prev_sfx->next)
1044                         if (prev_sfx->next == sfx)
1045                         {
1046                                 prev_sfx->next = sfx->next;
1047                                 break;
1048                         }
1049                 if (prev_sfx == NULL)
1050                 {
1051                         Con_Printf ("S_FreeSfx: Can't find SFX %s in the list!\n", sfx->name);
1052                         return;
1053                 }
1054         }
1055
1056         // Stop all channels using this sfx
1057         for (i = 0; i < total_channels; i++)
1058         {
1059                 if (channels[i].sfx == sfx)
1060                 {
1061                         Con_Printf("S_FreeSfx: stopping channel %i for sfx \"%s\"\n", i, sfx->name);
1062                         S_StopChannel (i, true, false);
1063                 }
1064         }
1065
1066         // Free it
1067         if (sfx->fetcher != NULL && sfx->fetcher->freesfx != NULL)
1068                 sfx->fetcher->freesfx(sfx);
1069         Mem_Free (sfx);
1070 }
1071
1072
1073 /*
1074 ==================
1075 S_ClearUsed
1076 ==================
1077 */
1078 void S_ClearUsed (void)
1079 {
1080         sfx_t *sfx;
1081 //      sfx_t *sfxnext;
1082         unsigned int i;
1083
1084         // Start the ambient sounds and make them loop
1085         for (i = 0; i < sizeof (ambient_sfxs) / sizeof (ambient_sfxs[0]); i++)
1086         {
1087                 // Precache it if it's not done (and pass false for levelsound because these are permanent)
1088                 if (ambient_sfxs[i] == NULL)
1089                         ambient_sfxs[i] = S_PrecacheSound (ambient_names[i], false, false);
1090                 if (ambient_sfxs[i] != NULL)
1091                 {
1092                         channels[i].sfx = ambient_sfxs[i];
1093                         channels[i].sfx->flags |= SFXFLAG_MENUSOUND;
1094                         channels[i].flags |= CHANNELFLAG_FORCELOOP;
1095                         channels[i].basevolume = 0.0f;
1096                         channels[i].basespeed = channels[i].mixspeed = 1.0f;
1097                 }
1098         }
1099
1100         // Clear SFXFLAG_LEVELSOUND flag so that sounds not precached this level will be purged
1101         for (sfx = known_sfx; sfx != NULL; sfx = sfx->next)
1102                 sfx->flags &= ~SFXFLAG_LEVELSOUND;
1103 }
1104
1105 /*
1106 ==================
1107 S_PurgeUnused
1108 ==================
1109 */
1110 void S_PurgeUnused(void)
1111 {
1112         sfx_t *sfx;
1113         sfx_t *sfxnext;
1114
1115         // Free all not-precached per-level sfx
1116         for (sfx = known_sfx;sfx;sfx = sfxnext)
1117         {
1118                 sfxnext = sfx->next;
1119                 if (!(sfx->flags & (SFXFLAG_LEVELSOUND | SFXFLAG_MENUSOUND)))
1120                         S_FreeSfx (sfx, false);
1121         }
1122 }
1123
1124
1125 /*
1126 ==================
1127 S_PrecacheSound
1128 ==================
1129 */
1130 sfx_t *S_PrecacheSound (const char *name, qboolean complain, qboolean levelsound)
1131 {
1132         sfx_t *sfx;
1133
1134         if (!snd_initialized.integer)
1135                 return NULL;
1136
1137         if (name == NULL || name[0] == 0)
1138                 return NULL;
1139
1140         sfx = S_FindName (name);
1141
1142         if (sfx == NULL)
1143                 return NULL;
1144
1145         // clear the FILEMISSING flag so that S_LoadSound will try again on a
1146         // previously missing file
1147         sfx->flags &= ~ SFXFLAG_FILEMISSING;
1148
1149         // set a flag to indicate this has been precached for this level or permanently
1150         if (levelsound)
1151                 sfx->flags |= SFXFLAG_LEVELSOUND;
1152         else
1153                 sfx->flags |= SFXFLAG_MENUSOUND;
1154
1155         if (!nosound.integer && snd_precache.integer)
1156                 S_LoadSound(sfx, complain);
1157
1158         return sfx;
1159 }
1160
1161 /*
1162 ==================
1163 S_SoundLength
1164 ==================
1165 */
1166
1167 float S_SoundLength(const char *name)
1168 {
1169         sfx_t *sfx;
1170
1171         if (!snd_initialized.integer)
1172                 return -1;
1173         if (name == NULL || name[0] == 0)
1174                 return -1;
1175
1176         sfx = S_FindName(name);
1177         if (sfx == NULL)
1178                 return -1;
1179         return sfx->total_length / (float) S_GetSoundRate();
1180 }
1181
1182 /*
1183 ==================
1184 S_IsSoundPrecached
1185 ==================
1186 */
1187 qboolean S_IsSoundPrecached (const sfx_t *sfx)
1188 {
1189         return (sfx != NULL && sfx->fetcher != NULL) || (sfx == &changevolume_sfx);
1190 }
1191
1192 /*
1193 ==================
1194 S_BlockSound
1195 ==================
1196 */
1197 void S_BlockSound (void)
1198 {
1199         snd_blocked++;
1200 }
1201
1202
1203 /*
1204 ==================
1205 S_UnblockSound
1206 ==================
1207 */
1208 void S_UnblockSound (void)
1209 {
1210         snd_blocked--;
1211 }
1212
1213
1214 /*
1215 =================
1216 SND_PickChannel
1217
1218 Picks a channel based on priorities, empty slots, number of channels
1219 =================
1220 */
1221 static channel_t *SND_PickChannel(int entnum, int entchannel)
1222 {
1223         int ch_idx;
1224         int first_to_die;
1225         int first_life_left, life_left;
1226         channel_t* ch;
1227         sfx_t *sfx; // use this instead of ch->sfx->, because that is volatile.
1228
1229 // Check for replacement sound, or find the best one to replace
1230         first_to_die = -1;
1231         first_life_left = 0x7fffffff;
1232
1233         // entity channels try to replace the existing sound on the channel
1234         // channels <= 0 are autochannels
1235         if (IS_CHAN_SINGLE(entchannel))
1236         {
1237                 for (ch_idx=NUM_AMBIENTS ; ch_idx < NUM_AMBIENTS + MAX_DYNAMIC_CHANNELS ; ch_idx++)
1238                 {
1239                         ch = &channels[ch_idx];
1240                         if (ch->entnum == entnum && ch->entchannel == entchannel)
1241                         {
1242                                 // always override sound from same entity
1243                                 S_StopChannel (ch_idx, true, false);
1244                                 return &channels[ch_idx];
1245                         }
1246                 }
1247         }
1248
1249         // there was no channel to override, so look for the first empty one
1250         for (ch_idx=NUM_AMBIENTS ; ch_idx < NUM_AMBIENTS + MAX_DYNAMIC_CHANNELS ; ch_idx++)
1251         {
1252                 ch = &channels[ch_idx];
1253                 sfx = ch->sfx; // fetch the volatile variable
1254                 if (!sfx)
1255                 {
1256                         // no sound on this channel
1257                         first_to_die = ch_idx;
1258                         goto emptychan_found;
1259                 }
1260
1261                 // don't let monster sounds override player sounds
1262                 if ((ch->entnum == cl.viewentity || ch->entnum == CL_VM_GetViewEntity()) && !(entnum == cl.viewentity || entnum == CL_VM_GetViewEntity()))
1263                         continue;
1264
1265                 // don't override looped sounds
1266                 if ((ch->flags & CHANNELFLAG_FORCELOOP) || sfx->loopstart < sfx->total_length)
1267                         continue;
1268                 life_left = (int)((double)sfx->total_length - ch->position);
1269
1270                 if (life_left < first_life_left)
1271                 {
1272                         first_life_left = life_left;
1273                         first_to_die = ch_idx;
1274                 }
1275         }
1276
1277         if (first_to_die == -1)
1278                 return NULL;
1279         
1280         S_StopChannel (first_to_die, true, false);
1281
1282 emptychan_found:
1283         return &channels[first_to_die];
1284 }
1285
1286 /*
1287 =================
1288 SND_Spatialize
1289
1290 Spatializes a channel
1291 =================
1292 */
1293 extern cvar_t cl_gameplayfix_soundsmovewithentities;
1294 static void SND_Spatialize_WithSfx(channel_t *ch, qboolean isstatic, sfx_t *sfx)
1295 {
1296         int i;
1297         double f;
1298         float angle_side, angle_front, angle_factor, mixspeed;
1299         vec_t dist, mastervol, intensity;
1300         vec3_t source_vec;
1301         char vabuf[1024];
1302
1303         // update sound origin if we know about the entity
1304         if (ch->entnum > 0 && cls.state == ca_connected && cl_gameplayfix_soundsmovewithentities.integer)
1305         {
1306                 if (ch->entnum >= MAX_EDICTS)
1307                 {
1308                         //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]);
1309
1310                         if (ch->entnum > MAX_EDICTS)
1311                                 if (!CL_VM_GetEntitySoundOrigin(ch->entnum, ch->origin))
1312                                         ch->entnum = MAX_EDICTS; // entity was removed, disown sound
1313                 }
1314                 else if (cl.entities[ch->entnum].state_current.active)
1315                 {
1316                         dp_model_t *model;
1317                         //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]);
1318                         model = CL_GetModelByIndex(cl.entities[ch->entnum].state_current.modelindex);
1319                         if (model && model->soundfromcenter)
1320                                 VectorMAM(0.5f, cl.entities[ch->entnum].render.mins, 0.5f, cl.entities[ch->entnum].render.maxs, ch->origin);
1321                         else
1322                                 Matrix4x4_OriginFromMatrix(&cl.entities[ch->entnum].render.matrix, ch->origin);
1323                 }
1324                 else if (cl.csqc_server2csqcentitynumber[ch->entnum])
1325                 {
1326                         //Con_Printf("-- entnum %i (client %i) origin %f %f %f neworigin %f %f %f\n", ch->entnum, cl.csqc_server2csqcentitynumber[ch->entnum], ch->origin[0], ch->origin[1], ch->origin[2], cl.entities[ch->entnum].state_current.origin[0], cl.entities[ch->entnum].state_current.origin[1], cl.entities[ch->entnum].state_current.origin[2]);
1327
1328                         if (!CL_VM_GetEntitySoundOrigin(cl.csqc_server2csqcentitynumber[ch->entnum] + MAX_EDICTS, ch->origin))
1329                                 ch->entnum = MAX_EDICTS; // entity was removed, disown sound
1330                 }
1331         }
1332
1333         mastervol = ch->basevolume;
1334         mixspeed = ch->basespeed;
1335
1336         // TODO: implement doppler based on origin change relative to viewer and time of recent origin changes
1337
1338         // Adjust volume of static sounds
1339         if (isstatic)
1340                 mastervol *= snd_staticvolume.value;
1341         else if(!(ch->flags & CHANNELFLAG_FULLVOLUME)) // same as SND_PaintChannel uses
1342         {
1343                 // old legacy separated cvars
1344                 if(ch->entnum >= MAX_EDICTS)
1345                 {
1346                         switch(ch->entchannel)
1347                         {
1348                                 case 0: mastervol *= snd_csqcchannel0volume.value; break;
1349                                 case 1: mastervol *= snd_csqcchannel1volume.value; break;
1350                                 case 2: mastervol *= snd_csqcchannel2volume.value; break;
1351                                 case 3: mastervol *= snd_csqcchannel3volume.value; break;
1352                                 case 4: mastervol *= snd_csqcchannel4volume.value; break;
1353                                 case 5: mastervol *= snd_csqcchannel5volume.value; break;
1354                                 case 6: mastervol *= snd_csqcchannel6volume.value; break;
1355                                 case 7: mastervol *= snd_csqcchannel7volume.value; break;
1356                                 default:                                           break;
1357                         }
1358                 }
1359                 else if(ch->entnum == 0)
1360                 {
1361                         switch(ch->entchannel)
1362                         {
1363                                 case 0: mastervol *= snd_worldchannel0volume.value; break;
1364                                 case 1: mastervol *= snd_worldchannel1volume.value; break;
1365                                 case 2: mastervol *= snd_worldchannel2volume.value; break;
1366                                 case 3: mastervol *= snd_worldchannel3volume.value; break;
1367                                 case 4: mastervol *= snd_worldchannel4volume.value; break;
1368                                 case 5: mastervol *= snd_worldchannel5volume.value; break;
1369                                 case 6: mastervol *= snd_worldchannel6volume.value; break;
1370                                 case 7: mastervol *= snd_worldchannel7volume.value; break;
1371                                 default:                                            break;
1372                         }
1373                 }
1374                 else if(ch->entnum > 0 && ch->entnum <= cl.maxclients)
1375                 {
1376                         switch(ch->entchannel)
1377                         {
1378                                 case 0: mastervol *= snd_playerchannel0volume.value; break;
1379                                 case 1: mastervol *= snd_playerchannel1volume.value; break;
1380                                 case 2: mastervol *= snd_playerchannel2volume.value; break;
1381                                 case 3: mastervol *= snd_playerchannel3volume.value; break;
1382                                 case 4: mastervol *= snd_playerchannel4volume.value; break;
1383                                 case 5: mastervol *= snd_playerchannel5volume.value; break;
1384                                 case 6: mastervol *= snd_playerchannel6volume.value; break;
1385                                 case 7: mastervol *= snd_playerchannel7volume.value; break;
1386                                 default:                                             break;
1387                         }
1388                 }
1389                 else
1390                 {
1391                         switch(ch->entchannel)
1392                         {
1393                                 case 0: mastervol *= snd_entchannel0volume.value; break;
1394                                 case 1: mastervol *= snd_entchannel1volume.value; break;
1395                                 case 2: mastervol *= snd_entchannel2volume.value; break;
1396                                 case 3: mastervol *= snd_entchannel3volume.value; break;
1397                                 case 4: mastervol *= snd_entchannel4volume.value; break;
1398                                 case 5: mastervol *= snd_entchannel5volume.value; break;
1399                                 case 6: mastervol *= snd_entchannel6volume.value; break;
1400                                 case 7: mastervol *= snd_entchannel7volume.value; break;
1401                                 default:                                          break;
1402                         }
1403                 }
1404
1405                 switch(ch->entchannel)
1406                 {
1407                         case 0:  mastervol *= snd_channel0volume.value; break;
1408                         case 1:  mastervol *= snd_channel1volume.value; break;
1409                         case 2:  mastervol *= snd_channel2volume.value; break;
1410                         case 3:  mastervol *= snd_channel3volume.value; break;
1411                         case 4:  mastervol *= snd_channel4volume.value; break;
1412                         case 5:  mastervol *= snd_channel5volume.value; break;
1413                         case 6:  mastervol *= snd_channel6volume.value; break;
1414                         case 7:  mastervol *= snd_channel7volume.value; break;
1415                         default: mastervol *= Cvar_VariableValueOr(va(vabuf, sizeof(vabuf), "snd_channel%dvolume", CHAN_ENGINE2CVAR(ch->entchannel)), 1.0); break;
1416                 }
1417         }
1418
1419         // If this channel does not manage its own volume (like CD tracks)
1420         if (!(ch->flags & CHANNELFLAG_FULLVOLUME))
1421                 mastervol *= volume.value;
1422
1423         if(snd_maxchannelvolume.value > 0)
1424         {
1425                 // clamp HERE to allow to go at most 10dB past mastervolume (before clamping), when mastervolume < -10dB (so relative volumes don't get too messy)
1426                 mastervol = bound(0.0f, mastervol, 10.0f * snd_maxchannelvolume.value);
1427         }
1428
1429         // always apply "master"
1430         mastervol *= mastervolume.value;
1431
1432         // add in ReplayGain very late; prevent clipping when close
1433         if(sfx)
1434         if(sfx->volume_peak > 0)
1435         {
1436                 // Replaygain support
1437                 // Con_DPrintf("Setting volume on ReplayGain-enabled track... %f -> ", fvol);
1438                 mastervol *= sfx->volume_mult;
1439                 if(snd_maxchannelvolume.value > 0)
1440                 {
1441                         if(mastervol * sfx->volume_peak > snd_maxchannelvolume.value)
1442                                 mastervol = snd_maxchannelvolume.value / sfx->volume_peak;
1443                 }
1444                 // Con_DPrintf("%f\n", fvol);
1445         }
1446
1447         if(snd_maxchannelvolume.value > 0)
1448         {
1449                 // clamp HERE to keep relative volumes of the channels correct
1450                 mastervol = min(mastervol, snd_maxchannelvolume.value);
1451         }
1452
1453         mastervol = max(0.0f, mastervol);
1454
1455         ch->mixspeed = mixspeed;
1456
1457         // anything coming from the view entity will always be full volume
1458         // LordHavoc: make sounds with ATTN_NONE have no spatialization
1459         if (ch->entnum == cl.viewentity || ch->entnum == CL_VM_GetViewEntity() || ch->distfade == 0)
1460         {
1461                 ch->prologic_invert = 1;
1462                 if (snd_spatialization_prologic.integer != 0)
1463                 {
1464                         ch->volume[0] = mastervol * snd_speakerlayout.listeners[0].ambientvolume * sqrt(0.5);
1465                         ch->volume[1] = mastervol * snd_speakerlayout.listeners[1].ambientvolume * sqrt(0.5);
1466                         for (i = 2;i < SND_LISTENERS;i++)
1467                                 ch->volume[i] = 0;
1468                 }
1469                 else
1470                 {
1471                         for (i = 0;i < SND_LISTENERS;i++)
1472                                 ch->volume[i] = mastervol * snd_speakerlayout.listeners[i].ambientvolume;
1473                 }
1474         }
1475         else
1476         {
1477                 // calculate stereo seperation and distance attenuation
1478                 VectorSubtract(listener_origin, ch->origin, source_vec);
1479                 dist = VectorLength(source_vec);
1480                 f = dist * ch->distfade;
1481
1482                 f =
1483                         ((snd_attenuation_exponent.value == 0) ? 1.0 : pow(1.0 - min(1.0, f), (double)snd_attenuation_exponent.value))
1484                         *
1485                         ((snd_attenuation_decibel.value == 0) ? 1.0 : pow(0.1, 0.1 * snd_attenuation_decibel.value * f));
1486
1487                 intensity = mastervol * f;
1488                 if (intensity > 0)
1489                 {
1490                         qboolean occluded = false;
1491                         if (snd_spatialization_occlusion.integer)
1492                         {
1493                                 if(snd_spatialization_occlusion.integer & 1)
1494                                         if(listener_pvs && cl.worldmodel)
1495                                         {
1496                                                 int cluster = cl.worldmodel->brush.PointInLeaf(cl.worldmodel, ch->origin)->clusterindex;
1497                                                 if(cluster >= 0 && cluster < 8 * listener_pvsbytes && !CHECKPVSBIT(listener_pvs, cluster))
1498                                                         occluded = true;
1499                                         }
1500
1501                                 if(snd_spatialization_occlusion.integer & 2)
1502                                         if(!occluded)
1503                                                 if(cl.worldmodel && cl.worldmodel->brush.TraceLineOfSight && !cl.worldmodel->brush.TraceLineOfSight(cl.worldmodel, listener_origin, ch->origin, ch->origin, ch->origin))
1504                                                         occluded = true;
1505                         }
1506                         if(occluded)
1507                                 intensity *= 0.5f;
1508
1509                         ch->prologic_invert = 1;
1510                         if (snd_spatialization_prologic.integer != 0)
1511                         {
1512                                 if (dist == 0)
1513                                         angle_factor = 0.5f;
1514                                 else
1515                                 {
1516                                         Matrix4x4_Transform(&listener_basematrix, ch->origin, source_vec);
1517                                         VectorNormalize(source_vec);
1518
1519                                         switch(spatialmethod)
1520                                         {
1521                                                 case SPATIAL_LOG:
1522                                                         if(dist == 0)
1523                                                                 f = spatialmin + spatialdiff * (spatialfactor < 0); // avoid log(0), but do the right thing
1524                                                         else
1525                                                                 f = spatialmin + spatialdiff * bound(0, (log(dist) - spatialoffset) * spatialfactor, 1);
1526                                                         VectorScale(source_vec, f, source_vec);
1527                                                         break;
1528                                                 case SPATIAL_POW:
1529                                                         f = (pow(dist, spatialpower) - spatialoffset) * spatialfactor;
1530                                                         f = spatialmin + spatialdiff * bound(0, f, 1);
1531                                                         VectorScale(source_vec, f, source_vec);
1532                                                         break;
1533                                                 case SPATIAL_THRESH:
1534                                                         f = spatialmin + spatialdiff * (dist < spatialoffset);
1535                                                         VectorScale(source_vec, f, source_vec);
1536                                                         break;
1537                                                 case SPATIAL_NONE:
1538                                                 default:
1539                                                         break;
1540                                         }
1541
1542                                         // 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
1543                                         source_vec[2] = 0;
1544                                         VectorNormalize(source_vec);
1545                                         angle_side = acos(source_vec[0]) / M_PI * 180;  // angle between 0 and 180 degrees
1546                                         angle_front = asin(source_vec[1]) / M_PI * 180; // angle between -90 and 90 degrees
1547                                         if (angle_side > snd_spatialization_prologic_frontangle.value)
1548                                         {
1549                                                 ch->prologic_invert = -1;       // this will cause the right channel to do a 180 degrees phase shift (turning the sound wave upside down),
1550                                                                                                         // but the best would be 90 degrees phase shift left and a -90 degrees phase shift right.
1551                                                 angle_factor = (angle_side - snd_spatialization_prologic_frontangle.value) / (360 - 2 * snd_spatialization_prologic_frontangle.value);
1552                                                 // angle_factor is between 0 and 1 and represents the angle range from the front left, to all the surround speakers (amount may vary,
1553                                                 // 1 in prologic I 2 in prologic II and 3 or 4 in prologic IIx) to the front right speaker.
1554                                                 if (angle_front > 0)
1555                                                         angle_factor = 1 - angle_factor;
1556                                         }
1557                                         else
1558                                                 angle_factor = angle_front / snd_spatialization_prologic_frontangle.value / 2.0 + 0.5;
1559                                                 //angle_factor is between 0 and 1 and represents the angle range from the front left to the center to the front right speaker
1560                                 }
1561
1562                                 ch->volume[0] = intensity * sqrt(angle_factor);
1563                                 ch->volume[1] = intensity * sqrt(1 - angle_factor);
1564                                 for (i = 2;i < SND_LISTENERS;i++)
1565                                         ch->volume[i] = 0;
1566                         }
1567                         else
1568                         {
1569                                 for (i = 0;i < SND_LISTENERS;i++)
1570                                 {
1571                                         Matrix4x4_Transform(&listener_matrix[i], ch->origin, source_vec);
1572                                         VectorNormalize(source_vec);
1573
1574                                         switch(spatialmethod)
1575                                         {
1576                                                 case SPATIAL_LOG:
1577                                                         if(dist == 0)
1578                                                                 f = spatialmin + spatialdiff * (spatialfactor < 0); // avoid log(0), but do the right thing
1579                                                         else
1580                                                                 f = spatialmin + spatialdiff * bound(0, (log(dist) - spatialoffset) * spatialfactor, 1);
1581                                                         VectorScale(source_vec, f, source_vec);
1582                                                         break;
1583                                                 case SPATIAL_POW:
1584                                                         f = (pow(dist, spatialpower) - spatialoffset) * spatialfactor;
1585                                                         f = spatialmin + spatialdiff * bound(0, f, 1);
1586                                                         VectorScale(source_vec, f, source_vec);
1587                                                         break;
1588                                                 case SPATIAL_THRESH:
1589                                                         f = spatialmin + spatialdiff * (dist < spatialoffset);
1590                                                         VectorScale(source_vec, f, source_vec);
1591                                                         break;
1592                                                 case SPATIAL_NONE:
1593                                                 default:
1594                                                         break;
1595                                         }
1596
1597                                         ch->volume[i] = intensity * max(0, source_vec[0] * snd_speakerlayout.listeners[i].dotscale + snd_speakerlayout.listeners[i].dotbias);
1598                                 }
1599                         }
1600                 }
1601                 else
1602                         for (i = 0;i < SND_LISTENERS;i++)
1603                                 ch->volume[i] = 0;
1604         }
1605 }
1606 static void SND_Spatialize(channel_t *ch, qboolean isstatic)
1607 {
1608         sfx_t *sfx = ch->sfx;
1609         SND_Spatialize_WithSfx(ch, isstatic, sfx);
1610 }
1611
1612
1613 // =======================================================================
1614 // Start a sound effect
1615 // =======================================================================
1616
1617 static void S_PlaySfxOnChannel (sfx_t *sfx, channel_t *target_chan, unsigned int flags, vec3_t origin, float fvol, float attenuation, qboolean isstatic, int entnum, int entchannel, int startpos, float fspeed)
1618 {
1619         if (!sfx)
1620         {
1621                 Con_Printf("S_PlaySfxOnChannel called with NULL??\n");
1622                 return;
1623         }
1624
1625         if ((sfx->loopstart < sfx->total_length) || (flags & CHANNELFLAG_FORCELOOP))
1626         {
1627                 if(!snd_startloopingsounds.integer)
1628                         return;
1629         }
1630         else
1631         {
1632                 if(!snd_startnonloopingsounds.integer)
1633                         return;
1634         }
1635
1636         // Initialize the channel
1637         // a crash was reported on an in-use channel, so check here...
1638         if (target_chan->sfx)
1639         {
1640                 int channelindex = (int)(target_chan - channels);
1641                 Con_Printf("S_PlaySfxOnChannel(%s): channel %i already in use??  Clearing.\n", sfx->name, channelindex);
1642                 S_StopChannel (channelindex, true, false);
1643         }
1644         // We MUST set sfx LAST because otherwise we could crash a threaded mixer
1645         // (otherwise we'd have to call SndSys_LockRenderBuffer here)
1646         memset (target_chan, 0, sizeof (*target_chan));
1647         VectorCopy (origin, target_chan->origin);
1648         target_chan->flags = flags;
1649         target_chan->position = startpos; // start of the sound
1650         target_chan->entnum = entnum;
1651         target_chan->entchannel = entchannel;
1652
1653         // If it's a static sound
1654         if (isstatic)
1655         {
1656                 if (sfx->loopstart >= sfx->total_length && (cls.protocol == PROTOCOL_QUAKE || cls.protocol == PROTOCOL_QUAKEWORLD))
1657                         Con_DPrintf("Quake compatibility warning: Static sound \"%s\" is not looped\n", sfx->name);
1658                 target_chan->distfade = attenuation / (64.0f * snd_soundradius.value);
1659         }
1660         else
1661                 target_chan->distfade = attenuation / snd_soundradius.value;
1662
1663         // set the listener volumes
1664         S_SetChannelVolume(target_chan - channels, fvol);
1665         S_SetChannelSpeed(target_chan - channels, fspeed);
1666         SND_Spatialize_WithSfx (target_chan, isstatic, sfx);
1667
1668         // finally, set the sfx pointer, so the channel becomes valid for playback
1669         // and will be noticed by the mixer
1670         target_chan->sfx = sfx;
1671 }
1672
1673
1674 int S_StartSound_StartPosition_Flags (int entnum, int entchannel, sfx_t *sfx, vec3_t origin, float fvol, float attenuation, float startposition, int flags, float fspeed)
1675 {
1676         channel_t *target_chan, *check, *ch;
1677         int             ch_idx, startpos, i;
1678
1679         if (snd_renderbuffer == NULL || sfx == NULL || nosound.integer)
1680                 return -1;
1681
1682         if(sfx == &changevolume_sfx)
1683         {
1684                 if (!IS_CHAN_SINGLE(entchannel))
1685                         return -1;
1686                 for (ch_idx=NUM_AMBIENTS ; ch_idx < NUM_AMBIENTS + MAX_DYNAMIC_CHANNELS ; ch_idx++)
1687                 {
1688                         ch = &channels[ch_idx];
1689                         if (ch->entnum == entnum && ch->entchannel == entchannel)
1690                         {
1691                                 S_SetChannelVolume(ch_idx, fvol);
1692                                 S_SetChannelSpeed(ch_idx, fspeed);
1693                                 for(i = 1; i > 0 && (i <= flags || i <= (int) channels[ch_idx].flags); i <<= 1)
1694                                         if((flags ^ channels[ch_idx].flags) & i)
1695                                                 S_SetChannelFlag(ch_idx, i, (flags & i) != 0);
1696                                 ch->distfade = attenuation / snd_soundradius.value;
1697                                 SND_Spatialize(ch, false);
1698                                 return ch_idx;
1699                         }
1700                 }
1701                 return -1;
1702         }
1703
1704         if (sfx->fetcher == NULL)
1705                 return -1;
1706
1707         // Pick a channel to play on
1708         target_chan = SND_PickChannel(entnum, entchannel);
1709         if (!target_chan)
1710                 return -1;
1711
1712         // if an identical sound has also been started this frame, offset the pos
1713         // a bit to keep it from just making the first one louder
1714         check = &channels[NUM_AMBIENTS];
1715         startpos = (int)(startposition * sfx->format.speed);
1716         if (startpos == 0)
1717         {
1718                 for (ch_idx=NUM_AMBIENTS ; ch_idx < NUM_AMBIENTS + MAX_DYNAMIC_CHANNELS ; ch_idx++, check++)
1719                 {
1720                         if (check == target_chan)
1721                                 continue;
1722                         if (check->sfx == sfx && check->position == 0 && check->basespeed == fspeed)
1723                         {
1724                                 // calculate max offset
1725                                 float maxtime = snd_identicalsoundrandomization_time.value;
1726                                 float maxtics = snd_identicalsoundrandomization_tics.value;
1727                                 float maxticsdelta = ((cls.state == ca_connected) ? (maxtics * (cl.mtime[0] - cl.mtime[1])) : 0);
1728                                 float maxdelta = 0;
1729                                 if(maxticsdelta == 0 || fabs(maxticsdelta) > fabs(maxtime))
1730                                         maxdelta = maxtime;
1731                                 else
1732                                         maxdelta = fabs(maxticsdelta) * ((maxtime > 0) ? 1 : -1);
1733
1734                                 // use negative pos offset to delay this sound effect
1735                                 startpos = lhrandom(0, maxdelta * sfx->format.speed);
1736                                 break;
1737                         }
1738                 }
1739         }
1740
1741         S_PlaySfxOnChannel (sfx, target_chan, flags, origin, fvol, attenuation, false, entnum, entchannel, startpos, fspeed);
1742
1743         return (target_chan - channels);
1744 }
1745
1746 int S_StartSound (int entnum, int entchannel, sfx_t *sfx, vec3_t origin, float fvol, float attenuation)
1747 {
1748         return S_StartSound_StartPosition_Flags(entnum, entchannel, sfx, origin, fvol, attenuation, 0, CHANNELFLAG_NONE, 1.0f);
1749 }
1750
1751 void S_StopChannel (unsigned int channel_ind, qboolean lockmutex, qboolean freesfx)
1752 {
1753         channel_t *ch;
1754         sfx_t *sfx;
1755
1756         if (channel_ind >= total_channels)
1757                 return;
1758
1759         // we have to lock an audio mutex to prevent crashes if an audio mixer
1760         // thread is currently mixing this channel
1761         // the SndSys_LockRenderBuffer function uses such a mutex in
1762         // threaded sound backends
1763         if (lockmutex && !simsound)
1764                 SndSys_LockRenderBuffer();
1765         
1766         ch = &channels[channel_ind];
1767         sfx = ch->sfx;
1768         if (sfx != NULL)
1769         {
1770                 if (sfx->fetcher != NULL && sfx->fetcher->stopchannel != NULL)
1771                         sfx->fetcher->stopchannel(ch);
1772                 ch->fetcher_data = NULL;
1773                 ch->sfx = NULL;
1774                 if (freesfx)
1775                         S_FreeSfx(sfx, true);
1776         }
1777         if (lockmutex && !simsound)
1778                 SndSys_UnlockRenderBuffer();
1779 }
1780
1781
1782 qboolean S_SetChannelFlag (unsigned int ch_ind, unsigned int flag, qboolean value)
1783 {
1784         if (ch_ind >= total_channels)
1785                 return false;
1786
1787         if (flag != CHANNELFLAG_FORCELOOP &&
1788                 flag != CHANNELFLAG_PAUSED &&
1789                 flag != CHANNELFLAG_FULLVOLUME &&
1790                 flag != CHANNELFLAG_LOCALSOUND)
1791                 return false;
1792
1793         if (value)
1794                 channels[ch_ind].flags |= flag;
1795         else
1796                 channels[ch_ind].flags &= ~flag;
1797
1798         return true;
1799 }
1800
1801 void S_StopSound(int entnum, int entchannel)
1802 {
1803         unsigned int i;
1804
1805         for (i = 0; i < MAX_DYNAMIC_CHANNELS; i++)
1806                 if (channels[i].entnum == entnum && channels[i].entchannel == entchannel)
1807                 {
1808                         S_StopChannel (i, true, false);
1809                         return;
1810                 }
1811 }
1812
1813 void S_StopAllSounds (void)
1814 {
1815         unsigned int i;
1816
1817         // TOCHECK: is this test necessary?
1818         if (snd_renderbuffer == NULL)
1819                 return;
1820
1821         // stop CD audio because it may be using a faketrack
1822         CDAudio_Stop();
1823
1824         if (simsound || SndSys_LockRenderBuffer ())
1825         {
1826                 int clear;
1827                 size_t memsize;
1828
1829                 for (i = 0; i < total_channels; i++)
1830                         if (channels[i].sfx)
1831                                 S_StopChannel (i, false, false);
1832
1833                 total_channels = MAX_DYNAMIC_CHANNELS + NUM_AMBIENTS;   // no statics
1834                 memset(channels, 0, MAX_CHANNELS * sizeof(channel_t));
1835
1836                 // Mute the contents of the submittion buffer
1837                 clear = (snd_renderbuffer->format.width == 1) ? 0x80 : 0;
1838                 memsize = snd_renderbuffer->maxframes * snd_renderbuffer->format.width * snd_renderbuffer->format.channels;
1839                 memset(snd_renderbuffer->ring, clear, memsize);
1840
1841                 if (!simsound)
1842                         SndSys_UnlockRenderBuffer ();
1843         }
1844 }
1845
1846 void S_PauseGameSounds (qboolean toggle)
1847 {
1848         unsigned int i;
1849
1850         for (i = 0; i < total_channels; i++)
1851         {
1852                 channel_t *ch;
1853
1854                 ch = &channels[i];
1855                 if (ch->sfx != NULL && ! (ch->flags & CHANNELFLAG_LOCALSOUND))
1856                         S_SetChannelFlag (i, CHANNELFLAG_PAUSED, toggle);
1857         }
1858 }
1859
1860 void S_SetChannelVolume(unsigned int ch_ind, float fvol)
1861 {
1862         channels[ch_ind].basevolume = fvol;
1863 }
1864
1865 void S_SetChannelSpeed(unsigned int ch_ind, float fspeed)
1866 {
1867         channels[ch_ind].basespeed = fspeed;
1868 }
1869
1870 float S_GetChannelPosition (unsigned int ch_ind)
1871 {
1872         // note: this is NOT accurate yet
1873         double s;
1874         channel_t *ch = &channels[ch_ind];
1875         sfx_t *sfx = ch->sfx;
1876         if (!sfx)
1877                 return -1;
1878
1879         s = ch->position / sfx->format.speed;
1880         /*
1881         if(!snd_usethreadedmixing)
1882                 s += _snd_mixahead.value;
1883         */
1884         return (float)s;
1885 }
1886
1887 float S_GetEntChannelPosition(int entnum, int entchannel)
1888 {
1889         channel_t *ch;
1890         unsigned int i;
1891
1892         for (i = 0; i < total_channels; i++)
1893         {
1894                 ch = &channels[i];
1895                 if (ch->entnum == entnum && ch->entchannel == entchannel)
1896                         return S_GetChannelPosition(i);
1897         }
1898         return -1; // no playing sound in this channel
1899 }
1900
1901 /*
1902 =================
1903 S_StaticSound
1904 =================
1905 */
1906 void S_StaticSound (sfx_t *sfx, vec3_t origin, float fvol, float attenuation)
1907 {
1908         channel_t       *target_chan;
1909
1910         if (snd_renderbuffer == NULL || sfx == NULL || nosound.integer)
1911                 return;
1912         if (!sfx->fetcher)
1913         {
1914                 Con_Printf ("S_StaticSound: \"%s\" hasn't been precached\n", sfx->name);
1915                 return;
1916         }
1917
1918         if (total_channels == MAX_CHANNELS)
1919         {
1920                 Con_Print("S_StaticSound: total_channels == MAX_CHANNELS\n");
1921                 return;
1922         }
1923
1924         target_chan = &channels[total_channels++];
1925         S_PlaySfxOnChannel (sfx, target_chan, CHANNELFLAG_FORCELOOP, origin, fvol, attenuation, true, 0, 0, 0, 1.0f);
1926 }
1927
1928
1929 /*
1930 ===================
1931 S_UpdateAmbientSounds
1932 ===================
1933 */
1934 static void S_UpdateAmbientSounds (void)
1935 {
1936         int                     i;
1937         float           vol;
1938         float           fade = (float)max(0.0, cl.time - cl.oldtime) * ambient_fade.value / 256.0f;
1939         int                     ambient_channel;
1940         channel_t       *chan;
1941         unsigned char           ambientlevels[NUM_AMBIENTS];
1942         sfx_t           *sfx;
1943
1944         memset(ambientlevels, 0, sizeof(ambientlevels));
1945         if (cl.worldmodel && cl.worldmodel->brush.AmbientSoundLevelsForPoint)
1946                 cl.worldmodel->brush.AmbientSoundLevelsForPoint(cl.worldmodel, listener_origin, ambientlevels, sizeof(ambientlevels));
1947
1948         // Calc ambient sound levels
1949         for (ambient_channel = 0 ; ambient_channel< NUM_AMBIENTS ; ambient_channel++)
1950         {
1951                 chan = &channels[ambient_channel];
1952                 sfx = chan->sfx; // fetch the volatile variable
1953                 if (sfx == NULL || sfx->fetcher == NULL)
1954                         continue;
1955
1956                 i = ambientlevels[ambient_channel];
1957                 if (i < 8)
1958                         i = 0;
1959                 vol = i * (1.0f / 256.0f);
1960
1961                 // Don't adjust volume too fast
1962                 if (chan->basevolume < vol)
1963                 {
1964                         chan->basevolume += fade;
1965                         if (chan->basevolume > vol)
1966                                 chan->basevolume = vol;
1967                 }
1968                 else if (chan->basevolume > vol)
1969                 {
1970                         chan->basevolume -= fade;
1971                         if (chan->basevolume < vol)
1972                                 chan->basevolume = vol;
1973                 }
1974
1975                 if (snd_spatialization_prologic.integer != 0)
1976                 {
1977                         chan->volume[0] = chan->basevolume * ambient_level.value * volume.value * mastervolume.value * snd_speakerlayout.listeners[0].ambientvolume * sqrt(0.5);
1978                         chan->volume[1] = chan->basevolume * ambient_level.value * volume.value * mastervolume.value * snd_speakerlayout.listeners[1].ambientvolume * sqrt(0.5);
1979                         for (i = 2;i < SND_LISTENERS;i++)
1980                                 chan->volume[i] = 0.0f;
1981                 }
1982                 else
1983                 {
1984                         for (i = 0;i < SND_LISTENERS;i++)
1985                                 chan->volume[i] = chan->basevolume * ambient_level.value * volume.value * mastervolume.value * snd_speakerlayout.listeners[i].ambientvolume;
1986                 }
1987         }
1988 }
1989
1990 static void S_PaintAndSubmit (void)
1991 {
1992         unsigned int newsoundtime, paintedtime, endtime, maxtime, usedframes;
1993         int usesoundtimehack;
1994         static int soundtimehack = -1;
1995         static int oldsoundtime = 0;
1996
1997         if (snd_renderbuffer == NULL || nosound.integer)
1998                 return;
1999
2000         // Update sound time
2001         snd_usethreadedmixing = false;
2002         usesoundtimehack = true;
2003         if (cls.timedemo) // SUPER NASTY HACK to mix non-realtime sound for more reliable benchmarking
2004         {
2005                 usesoundtimehack = 1;
2006                 newsoundtime = (unsigned int)((double)cl.mtime[0] * (double)snd_renderbuffer->format.speed);
2007         }
2008         else if (cls.capturevideo.soundrate && !cls.capturevideo.realtime) // SUPER NASTY HACK to record non-realtime sound
2009         {
2010                 usesoundtimehack = 2;
2011                 newsoundtime = (unsigned int)((double)cls.capturevideo.frame * (double)snd_renderbuffer->format.speed / (double)cls.capturevideo.framerate);
2012         }
2013         else if (simsound)
2014         {
2015                 usesoundtimehack = 3;
2016                 newsoundtime = (unsigned int)((realtime - snd_starttime) * (double)snd_renderbuffer->format.speed);
2017         }
2018         else
2019         {
2020                 snd_usethreadedmixing = snd_threaded && !cls.capturevideo.soundrate;
2021                 usesoundtimehack = 0;
2022                 newsoundtime = SndSys_GetSoundTime();
2023         }
2024         // if the soundtimehack state changes we need to reset the soundtime
2025         if (soundtimehack != usesoundtimehack)
2026         {
2027                 snd_renderbuffer->startframe = snd_renderbuffer->endframe = soundtime = newsoundtime;
2028
2029                 // Mute the contents of the submission buffer
2030                 if (simsound || SndSys_LockRenderBuffer ())
2031                 {
2032                         int clear;
2033                         size_t memsize;
2034
2035                         clear = (snd_renderbuffer->format.width == 1) ? 0x80 : 0;
2036                         memsize = snd_renderbuffer->maxframes * snd_renderbuffer->format.width * snd_renderbuffer->format.channels;
2037                         memset(snd_renderbuffer->ring, clear, memsize);
2038
2039                         if (!simsound)
2040                                 SndSys_UnlockRenderBuffer ();
2041                 }
2042         }
2043         soundtimehack = usesoundtimehack;
2044
2045         if (!soundtimehack && snd_blocked > 0)
2046                 return;
2047
2048         if (snd_usethreadedmixing)
2049                 return; // the audio thread will mix its own data
2050
2051         newsoundtime += extrasoundtime;
2052         if (newsoundtime < soundtime)
2053         {
2054                 if ((cls.capturevideo.soundrate != 0) != recording_sound)
2055                 {
2056                         unsigned int additionaltime;
2057
2058                         // add some time to extrasoundtime make newsoundtime higher
2059
2060                         // The extra time must be a multiple of the render buffer size
2061                         // to avoid modifying the current position in the buffer,
2062                         // some modules write directly to a shared (DMA) buffer
2063                         additionaltime = (soundtime - newsoundtime) + snd_renderbuffer->maxframes - 1;
2064                         additionaltime -= additionaltime % snd_renderbuffer->maxframes;
2065
2066                         extrasoundtime += additionaltime;
2067                         newsoundtime += additionaltime;
2068                         Con_DPrintf("S_PaintAndSubmit: new extra sound time = %u\n",
2069                                                 extrasoundtime);
2070                 }
2071                 else if (!soundtimehack)
2072                         Con_Printf("S_PaintAndSubmit: WARNING: newsoundtime < soundtime (%u < %u)\n",
2073                                            newsoundtime, soundtime);
2074         }
2075         soundtime = newsoundtime;
2076         recording_sound = (cls.capturevideo.soundrate != 0);
2077
2078         // Lock submitbuffer
2079         if (!simsound && !SndSys_LockRenderBuffer())
2080         {
2081                 // If the lock failed, stop here
2082                 Con_DPrint(">> S_PaintAndSubmit: SndSys_LockRenderBuffer() failed\n");
2083                 return;
2084         }
2085
2086         // Check to make sure that we haven't overshot
2087         paintedtime = snd_renderbuffer->endframe;
2088         if (paintedtime < soundtime)
2089                 paintedtime = soundtime;
2090
2091         // mix ahead of current position
2092         if (soundtimehack)
2093                 endtime = soundtime + (unsigned int)(_snd_mixahead.value * (float)snd_renderbuffer->format.speed);
2094         else
2095                 endtime = soundtime + (unsigned int)(max(_snd_mixahead.value * (float)snd_renderbuffer->format.speed, min(3 * (soundtime - oldsoundtime), 0.3 * (float)snd_renderbuffer->format.speed)));
2096         usedframes = snd_renderbuffer->endframe - snd_renderbuffer->startframe;
2097         maxtime = paintedtime + snd_renderbuffer->maxframes - usedframes;
2098         endtime = min(endtime, maxtime);
2099
2100         while (paintedtime < endtime)
2101         {
2102                 unsigned int startoffset;
2103                 unsigned int nbframes;
2104
2105                 // see how much we can fit in the paint buffer
2106                 nbframes = endtime - paintedtime;
2107                 // limit to the end of the ring buffer (in case of wrapping)
2108                 startoffset = paintedtime % snd_renderbuffer->maxframes;
2109                 nbframes = min(nbframes, snd_renderbuffer->maxframes - startoffset);
2110
2111                 // mix into the buffer
2112                 S_MixToBuffer(&snd_renderbuffer->ring[startoffset * snd_renderbuffer->format.width * snd_renderbuffer->format.channels], nbframes);
2113
2114                 paintedtime += nbframes;
2115                 snd_renderbuffer->endframe = paintedtime;
2116         }
2117         if (!simsound)
2118                 SndSys_UnlockRenderBuffer();
2119
2120         // Remove outdated samples from the ring buffer, if any
2121         if (snd_renderbuffer->startframe < soundtime)
2122                 snd_renderbuffer->startframe = soundtime;
2123
2124         if (simsound)
2125                 snd_renderbuffer->startframe = snd_renderbuffer->endframe;
2126         else
2127                 SndSys_Submit();
2128
2129         oldsoundtime = soundtime;
2130
2131         cls.soundstats.latency_milliseconds = (snd_renderbuffer->endframe - snd_renderbuffer->startframe) * 1000 / snd_renderbuffer->format.speed;
2132         R_TimeReport("audiomix");
2133 }
2134
2135 /*
2136 ============
2137 S_Update
2138
2139 Called once each time through the main loop
2140 ============
2141 */
2142 void S_Update(const matrix4x4_t *listenermatrix)
2143 {
2144         unsigned int i, j, k;
2145         channel_t *ch, *combine;
2146         matrix4x4_t rotatematrix;
2147
2148         if (snd_renderbuffer == NULL || nosound.integer)
2149                 return;
2150
2151         {
2152                 double mindist_trans, maxdist_trans;
2153
2154                 spatialmin = snd_spatialization_min.value;
2155                 spatialdiff = snd_spatialization_max.value - spatialmin;
2156
2157                 if(snd_spatialization_control.value)
2158                 {
2159                         spatialpower = snd_spatialization_power.value;
2160
2161                         if(spatialpower == 0)
2162                         {
2163                                 spatialmethod = SPATIAL_LOG;
2164                                 mindist_trans = log(max(1, snd_spatialization_min_radius.value));
2165                                 maxdist_trans = log(max(1, snd_spatialization_max_radius.value));
2166                         }
2167                         else
2168                         {
2169                                 spatialmethod = SPATIAL_POW;
2170                                 mindist_trans = pow(snd_spatialization_min_radius.value, spatialpower);
2171                                 maxdist_trans = pow(snd_spatialization_max_radius.value, spatialpower);
2172                         }
2173
2174                         if(mindist_trans - maxdist_trans == 0)
2175                         {
2176                                 spatialmethod = SPATIAL_THRESH;
2177                                 mindist_trans = snd_spatialization_min_radius.value;
2178                         }
2179                         else
2180                         {
2181                                 spatialoffset = mindist_trans;
2182                                 spatialfactor = 1 / (maxdist_trans - mindist_trans);
2183                         }
2184                 }
2185                 else
2186                         spatialmethod = SPATIAL_NONE;
2187
2188         }
2189
2190         // If snd_swapstereo or snd_channellayout has changed, recompute the channel layout
2191         if (current_swapstereo != boolxor(snd_swapstereo.integer, v_flipped.integer) ||
2192                 current_channellayout != snd_channellayout.integer)
2193                 S_SetChannelLayout();
2194
2195         Matrix4x4_Invert_Simple(&listener_basematrix, listenermatrix);
2196         Matrix4x4_OriginFromMatrix(listenermatrix, listener_origin);
2197         if (cl.worldmodel && cl.worldmodel->brush.FatPVS && cl.worldmodel->brush.num_pvsclusterbytes && cl.worldmodel->brush.PointInLeaf)
2198         {
2199                 if(cl.worldmodel->brush.num_pvsclusterbytes != listener_pvsbytes)
2200                 {
2201                         if(listener_pvs)
2202                                 Mem_Free(listener_pvs);
2203                         listener_pvsbytes = cl.worldmodel->brush.num_pvsclusterbytes;
2204                         listener_pvs = (unsigned char *) Mem_Alloc(snd_mempool, listener_pvsbytes);
2205                 }
2206                 cl.worldmodel->brush.FatPVS(cl.worldmodel, listener_origin, 2, listener_pvs, listener_pvsbytes, 0);
2207         }
2208         else
2209         {
2210                 if(listener_pvs)
2211                 {
2212                         Mem_Free(listener_pvs);
2213                         listener_pvs = NULL;
2214                 }
2215                 listener_pvsbytes = 0;
2216         }
2217
2218         // calculate the current matrices
2219         for (j = 0;j < SND_LISTENERS;j++)
2220         {
2221                 Matrix4x4_CreateFromQuakeEntity(&rotatematrix, 0, 0, 0, 0, -snd_speakerlayout.listeners[j].yawangle, 0, 1);
2222                 Matrix4x4_Concat(&listener_matrix[j], &rotatematrix, &listener_basematrix);
2223                 // I think this should now do this:
2224                 //   1. create a rotation matrix for rotating by e.g. -90 degrees CCW
2225                 //      (note: the matrix will rotate the OBJECT, not the VIEWER, so its
2226                 //       angle has to be taken negative)
2227                 //   2. create a transform which first rotates and moves its argument
2228                 //      into the player's view coordinates (using basematrix which is
2229                 //      an inverted "absolute" listener matrix), then applies the
2230                 //      rotation matrix for the ear
2231                 // Isn't Matrix4x4_CreateFromQuakeEntity a bit misleading because this
2232                 // does not actually refer to an entity?
2233         }
2234
2235         // update general area ambient sound sources
2236         S_UpdateAmbientSounds ();
2237
2238         combine = NULL;
2239         R_TimeReport("audioprep");
2240
2241         // update spatialization for static and dynamic sounds
2242         cls.soundstats.totalsounds = 0;
2243         cls.soundstats.mixedsounds = 0;
2244         ch = channels+NUM_AMBIENTS;
2245         for (i=NUM_AMBIENTS ; i<total_channels; i++, ch++)
2246         {
2247                 if (!ch->sfx)
2248                         continue;
2249                 cls.soundstats.totalsounds++;
2250
2251                 // respatialize channel
2252                 SND_Spatialize(ch, i >= MAX_DYNAMIC_CHANNELS + NUM_AMBIENTS);
2253
2254                 // try to combine static sounds with a previous channel of the same
2255                 // sound effect so we don't mix five torches every frame
2256                 if (i > MAX_DYNAMIC_CHANNELS + NUM_AMBIENTS)
2257                 {
2258                         // no need to merge silent channels
2259                         for (j = 0;j < SND_LISTENERS;j++)
2260                                 if (ch->volume[j])
2261                                         break;
2262                         if (j == SND_LISTENERS)
2263                                 continue;
2264                         // if the last combine chosen isn't suitable, find a new one
2265                         if (!(combine && combine != ch && combine->sfx == ch->sfx))
2266                         {
2267                                 // search for one
2268                                 combine = NULL;
2269                                 for (j = MAX_DYNAMIC_CHANNELS + NUM_AMBIENTS;j < i;j++)
2270                                 {
2271                                         if (channels[j].sfx == ch->sfx)
2272                                         {
2273                                                 combine = channels + j;
2274                                                 break;
2275                                         }
2276                                 }
2277                         }
2278                         if (combine && combine != ch && combine->sfx == ch->sfx)
2279                         {
2280                                 for (j = 0;j < SND_LISTENERS;j++)
2281                                 {
2282                                         combine->volume[j] += ch->volume[j];
2283                                         ch->volume[j] = 0;
2284                                 }
2285                         }
2286                 }
2287                 for (k = 0;k < SND_LISTENERS;k++)
2288                         if (ch->volume[k])
2289                                 break;
2290                 if (k < SND_LISTENERS)
2291                         cls.soundstats.mixedsounds++;
2292         }
2293         R_TimeReport("audiospatialize");
2294
2295         sound_spatialized = true;
2296
2297         // debugging output
2298         if (snd_show.integer)
2299                 Con_Printf("----(%u)----\n", cls.soundstats.mixedsounds);
2300
2301         S_PaintAndSubmit();
2302 }
2303
2304 void S_ExtraUpdate (void)
2305 {
2306         if (snd_noextraupdate.integer || !sound_spatialized)
2307                 return;
2308
2309         S_PaintAndSubmit();
2310 }
2311
2312 qboolean S_LocalSound (const char *sound)
2313 {
2314         sfx_t   *sfx;
2315         int             ch_ind;
2316
2317         if (!snd_initialized.integer || nosound.integer)
2318                 return true;
2319
2320         sfx = S_PrecacheSound (sound, true, false);
2321         if (!sfx)
2322         {
2323                 Con_Printf("S_LocalSound: can't precache %s\n", sound);
2324                 return false;
2325         }
2326
2327         // menu sounds must not be freed on level change
2328         sfx->flags |= SFXFLAG_MENUSOUND;
2329
2330         // fun fact: in Quake 1, this used -1 "replace any entity channel",
2331         // which we no longer support anyway
2332         // changed by Black in r4297 "Changed S_LocalSound to play multiple sounds at a time."
2333         ch_ind = S_StartSound (cl.viewentity, 0, sfx, vec3_origin, 1, 0);
2334         if (ch_ind < 0)
2335                 return false;
2336
2337         channels[ch_ind].flags |= CHANNELFLAG_LOCALSOUND;
2338         return true;
2339 }