implemented individual file downloads on darkplaces servers
[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
27
28 #define SND_MIN_SPEED 8000
29 #define SND_MAX_SPEED 48000
30 #define SND_MIN_WIDTH 1
31 #define SND_MAX_WIDTH 2
32 #define SND_MIN_CHANNELS 1
33 #define SND_MAX_CHANNELS 8
34
35 #if SND_LISTENERS != 8
36 #       error this data only supports up to 8 channel, update it!
37 #endif
38 typedef struct listener_s
39 {
40         float yawangle;
41         float dotscale;
42         float dotbias;
43         float ambientvolume;
44 }
45 listener_t;
46 typedef struct speakerlayout_s
47 {
48         const char *name;
49         unsigned int channels;
50         listener_t listeners[SND_LISTENERS];
51 }
52 speakerlayout_t;
53
54 static speakerlayout_t snd_speakerlayout;
55
56 // Our speaker layouts are based on ALSA. They differ from those
57 // Win32 and Mac OS X APIs use when there's more than 4 channels.
58 // (rear left + rear right, and front center + LFE are swapped).
59 #define SND_SPEAKERLAYOUTS (sizeof(snd_speakerlayouts) / sizeof(snd_speakerlayouts[0]))
60 static const speakerlayout_t snd_speakerlayouts[] =
61 {
62         {
63                 "surround71", 8,
64                 {
65                         {45, 0.2, 0.2, 0.5}, // front left
66                         {315, 0.2, 0.2, 0.5}, // front right
67                         {135, 0.2, 0.2, 0.5}, // rear left
68                         {225, 0.2, 0.2, 0.5}, // rear right
69                         {0, 0.2, 0.2, 0.5}, // front center
70                         {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                         {90, 0.2, 0.2, 0.5}, // side left
72                         {180, 0.2, 0.2, 0.5}, // side right
73                 }
74         },
75         {
76                 "surround51", 6,
77                 {
78                         {45, 0.2, 0.2, 0.5}, // front left
79                         {315, 0.2, 0.2, 0.5}, // front right
80                         {135, 0.2, 0.2, 0.5}, // rear left
81                         {225, 0.2, 0.2, 0.5}, // rear right
82                         {0, 0.2, 0.2, 0.5}, // front center
83                         {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)
84                         {0, 0, 0, 0},
85                         {0, 0, 0, 0},
86                 }
87         },
88         {
89                 // these systems sometimes have a subwoofer as well, but it has no
90                 // channel of its own
91                 "surround40", 4,
92                 {
93                         {45, 0.3, 0.3, 0.8}, // front left
94                         {315, 0.3, 0.3, 0.8}, // front right
95                         {135, 0.3, 0.3, 0.8}, // rear left
96                         {225, 0.3, 0.3, 0.8}, // rear right
97                         {0, 0, 0, 0},
98                         {0, 0, 0, 0},
99                         {0, 0, 0, 0},
100                         {0, 0, 0, 0},
101                 }
102         },
103         {
104                 // these systems sometimes have a subwoofer as well, but it has no
105                 // channel of its own
106                 "stereo", 2,
107                 {
108                         {90, 0.5, 0.5, 1}, // side left
109                         {270, 0.5, 0.5, 1}, // side right
110                         {0, 0, 0, 0},
111                         {0, 0, 0, 0},
112                         {0, 0, 0, 0},
113                         {0, 0, 0, 0},
114                         {0, 0, 0, 0},
115                         {0, 0, 0, 0},
116                 }
117         },
118         {
119                 "mono", 1,
120                 {
121                         {0, 0, 1, 1}, // center
122                         {0, 0, 0, 0},
123                         {0, 0, 0, 0},
124                         {0, 0, 0, 0},
125                         {0, 0, 0, 0},
126                         {0, 0, 0, 0},
127                         {0, 0, 0, 0},
128                         {0, 0, 0, 0},
129                 }
130         }
131 };
132
133
134 // =======================================================================
135 // Internal sound data & structures
136 // =======================================================================
137
138 channel_t channels[MAX_CHANNELS];
139 unsigned int total_channels;
140
141 snd_ringbuffer_t *snd_renderbuffer = NULL;
142 unsigned int soundtime = 0;
143 static unsigned int oldpaintedtime = 0;
144 static unsigned int extrasoundtime = 0;
145 static double snd_starttime = 0.0;
146
147 vec3_t listener_origin;
148 matrix4x4_t listener_matrix[SND_LISTENERS];
149 mempool_t *snd_mempool;
150
151 // Linked list of known sfx
152 static sfx_t *known_sfx = NULL;
153
154 static qboolean sound_spatialized = false;
155
156 qboolean simsound = false;
157
158 static qboolean recording_sound = false;
159
160 int snd_blocked = 0;
161 static int current_swapstereo = false;
162 static int current_channellayout = SND_CHANNELLAYOUT_AUTO;
163 static int current_channellayout_used = SND_CHANNELLAYOUT_AUTO;
164
165 // Cvars declared in sound.h (part of the sound API)
166 cvar_t bgmvolume = {CVAR_SAVE, "bgmvolume", "1", "volume of background music (such as CD music or replacement files such as sound/cdtracks/track002.ogg)"};
167 cvar_t volume = {CVAR_SAVE, "volume", "0.7", "volume of sound effects"};
168 cvar_t snd_initialized = { CVAR_READONLY, "snd_initialized", "0", "indicates the sound subsystem is active"};
169 cvar_t snd_staticvolume = {CVAR_SAVE, "snd_staticvolume", "1", "volume of ambient sound effects (such as swampy sounds at the start of e1m2)"};
170 cvar_t snd_soundradius = {0, "snd_soundradius", "1000", "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)"};
171
172 // Cvars declared in snd_main.h (shared with other snd_*.c files)
173 cvar_t _snd_mixahead = {CVAR_SAVE, "_snd_mixahead", "0.1", "how much sound to mix ahead of time"};
174 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)"};
175 cvar_t snd_swapstereo = {CVAR_SAVE, "snd_swapstereo", "0", "swaps left/right speakers for old ISA soundblaster cards"};
176 cvar_t snd_channellayout = {0, "snd_channellayout", "0", "channel layout. Can be 0 (auto - snd_restart needed), 1 (standard layout), or 2 (ALSA layout)"};
177
178 // Local cvars
179 static cvar_t nosound = {0, "nosound", "0", "disables sound"};
180 static cvar_t snd_precache = {0, "snd_precache", "1", "loads sounds before they are used"};
181 static cvar_t ambient_level = {0, "ambient_level", "0.3", "volume of environment noises (water and wind)"};
182 static cvar_t ambient_fade = {0, "ambient_fade", "100", "rate of volume fading when moving from one environment to another"};
183 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"};
184 static cvar_t snd_show = {0, "snd_show", "0", "shows some statistics about sound mixing"};
185
186 // Default sound format is 48KHz, 16-bit, stereo
187 // (48KHz because a lot of onboard sound cards sucks at any other speed)
188 static cvar_t snd_speed = {CVAR_SAVE, "snd_speed", "48000", "sound output frequency, in hertz"};
189 static cvar_t snd_width = {CVAR_SAVE, "snd_width", "2", "sound output precision, in bytes (1 and 2 supported)"};
190 static cvar_t snd_channels = {CVAR_SAVE, "snd_channels", "2", "number of channels for the sound ouput (2 for stereo; up to 8 supported for 3D sound)"};
191
192 // Ambient sounds
193 static sfx_t* ambient_sfxs [2] = { NULL, NULL };
194 static const char* ambient_names [2] = { "sound/ambience/water1.wav", "sound/ambience/wind2.wav" };
195
196
197 // ====================================================================
198 // Functions
199 // ====================================================================
200
201 void S_FreeSfx (sfx_t *sfx, qboolean force);
202
203 static void S_Play_Common (float fvol, float attenuation)
204 {
205         int i, ch_ind;
206         char name [MAX_QPATH];
207         sfx_t *sfx;
208
209         i = 1;
210         while (i < Cmd_Argc ())
211         {
212                 // Get the name, and appends ".wav" as an extension if there's none
213                 strlcpy (name, Cmd_Argv (i), sizeof (name));
214                 if (!strrchr (name, '.'))
215                         strlcat (name, ".wav", sizeof (name));
216                 i++;
217
218                 // If we need to get the volume from the command line
219                 if (fvol == -1.0f)
220                 {
221                         fvol = atof (Cmd_Argv (i));
222                         i++;
223                 }
224
225                 sfx = S_PrecacheSound (name, true, false);
226                 if (sfx)
227                 {
228                         ch_ind = S_StartSound (-1, 0, sfx, listener_origin, fvol, attenuation);
229
230                         // Free the sfx if the file didn't exist
231                         if (ch_ind < 0)
232                                 S_FreeSfx (sfx, false);
233                         else
234                                 channels[ch_ind].flags |= CHANNELFLAG_LOCALSOUND;
235                 }
236         }
237 }
238
239 static void S_Play_f(void)
240 {
241         S_Play_Common (1.0f, 1.0f);
242 }
243
244 static void S_Play2_f(void)
245 {
246         S_Play_Common (1.0f, 0.0f);
247 }
248
249 static void S_PlayVol_f(void)
250 {
251         S_Play_Common (-1.0f, 0.0f);
252 }
253
254 static void S_SoundList_f (void)
255 {
256         unsigned int i;
257         sfx_t *sfx;
258         unsigned int total;
259
260         total = 0;
261         for (sfx = known_sfx, i = 0; sfx != NULL; sfx = sfx->next, i++)
262         {
263                 if (sfx->fetcher != NULL)
264                 {
265                         unsigned int size;
266                         const snd_format_t* format;
267
268                         size = sfx->memsize;
269                         format = sfx->fetcher->getfmt(sfx);
270                         Con_Printf ("%c%c%c%c(%2db, %6s) %8i : %s\n",
271                                                 (sfx->loopstart >= 0) ? 'L' : ' ',
272                                                 (sfx->flags & SFXFLAG_STREAMED) ? 'S' : ' ',
273                                                 (sfx->locks > 0) ? 'K' : ' ',
274                                                 (sfx->flags & SFXFLAG_PERMANENTLOCK) ? 'P' : ' ',
275                                                 format->width * 8,
276                                                 (format->channels == 1) ? "mono" : "stereo",
277                                                 size,
278                                                 sfx->name);
279                         total += size;
280                 }
281                 else
282                         Con_Printf ("    (  unknown  ) unloaded : %s\n", sfx->name);
283         }
284         Con_Printf("Total resident: %i\n", total);
285 }
286
287
288 void S_SoundInfo_f(void)
289 {
290         if (snd_renderbuffer == NULL)
291         {
292                 Con_Print("sound system not started\n");
293                 return;
294         }
295
296         Con_Printf("%5d speakers\n", snd_renderbuffer->format.channels);
297         Con_Printf("%5d frames\n", snd_renderbuffer->maxframes);
298         Con_Printf("%5d samplebits\n", snd_renderbuffer->format.width * 8);
299         Con_Printf("%5d speed\n", snd_renderbuffer->format.speed);
300         Con_Printf("%5u total_channels\n", total_channels);
301 }
302
303
304 int S_GetSoundRate(void)
305 {
306         return snd_renderbuffer ? snd_renderbuffer->format.speed : 0;
307 }
308
309
310 static qboolean S_ChooseCheaperFormat (snd_format_t* format, qboolean fixed_speed, qboolean fixed_width, qboolean fixed_channels)
311 {
312         static const snd_format_t thresholds [] =
313         {
314                 // speed                        width                   channels
315                 { SND_MIN_SPEED,        SND_MIN_WIDTH,  SND_MIN_CHANNELS },
316                 { 11025,                        1,                              2 },
317                 { 22050,                        2,                              2 },
318                 { 44100,                        2,                              2 },
319                 { 48000,                        2,                              6 },
320                 { SND_MAX_SPEED,        SND_MAX_WIDTH,  SND_MAX_CHANNELS },
321         };
322         const unsigned int nb_thresholds = sizeof(thresholds) / sizeof(thresholds[0]);
323         unsigned int speed_level, width_level, channels_level;
324
325         // If we have reached the minimum values, there's nothing more we can do
326         if ((format->speed == thresholds[0].speed || fixed_speed) &&
327                 (format->width == thresholds[0].width || fixed_width) &&
328                 (format->channels == thresholds[0].channels || fixed_channels))
329                 return false;
330
331         // Check the min and max values
332         #define CHECK_BOUNDARIES(param)                                                         \
333         if (format->param < thresholds[0].param)                                        \
334         {                                                                                                                       \
335                 format->param = thresholds[0].param;                                    \
336                 return true;                                                                                    \
337         }                                                                                                                       \
338         if (format->param > thresholds[nb_thresholds - 1].param)        \
339         {                                                                                                                       \
340                 format->param = thresholds[nb_thresholds - 1].param;    \
341                 return true;                                                                                    \
342         }
343         CHECK_BOUNDARIES(speed);
344         CHECK_BOUNDARIES(width);
345         CHECK_BOUNDARIES(channels);
346         #undef CHECK_BOUNDARIES
347
348         // Find the level of each parameter
349         #define FIND_LEVEL(param)                                                                       \
350         param##_level = 0;                                                                                      \
351         while (param##_level < nb_thresholds - 1)                                       \
352         {                                                                                                                       \
353                 if (format->param <= thresholds[param##_level].param)   \
354                         break;                                                                                          \
355                                                                                                                                 \
356                 param##_level++;                                                                                \
357         }
358         FIND_LEVEL(speed);
359         FIND_LEVEL(width);
360         FIND_LEVEL(channels);
361         #undef FIND_LEVEL
362
363         // Decrease the parameter with the highest level to the previous level
364         if (channels_level >= speed_level && channels_level >= width_level && !fixed_channels)
365         {
366                 format->channels = thresholds[channels_level - 1].channels;
367                 return true;
368         }
369         if (speed_level >= width_level && !fixed_speed)
370         {
371                 format->speed = thresholds[speed_level - 1].speed;
372                 return true;
373         }
374
375         format->width = thresholds[width_level - 1].width;
376         return true;
377 }
378
379
380 #define SWAP_LISTENERS(l1, l2, tmpl) { tmpl = (l1); (l1) = (l2); (l2) = tmpl; }
381
382 static void S_SetChannelLayout (void)
383 {
384         unsigned int i;
385         listener_t swaplistener;
386         listener_t *listeners;
387         int layout;
388
389         for (i = 0; i < SND_SPEAKERLAYOUTS; i++)
390                 if (snd_speakerlayouts[i].channels == snd_renderbuffer->format.channels)
391                         break;
392         if (i >= SND_SPEAKERLAYOUTS)
393         {
394                 Con_Printf("S_SetChannelLayout: can't find the speaker layout for %hu channels. Defaulting to mono output\n",
395                                    snd_renderbuffer->format.channels);
396                 i = SND_SPEAKERLAYOUTS - 1;
397         }
398
399         snd_speakerlayout = snd_speakerlayouts[i];
400         listeners = snd_speakerlayout.listeners;
401
402         // Swap the left and right channels if snd_swapstereo is set
403         if (snd_swapstereo.integer)
404         {
405                 switch (snd_speakerlayout.channels)
406                 {
407                         case 8:
408                                 SWAP_LISTENERS(listeners[6], listeners[7], swaplistener);
409                                 // no break
410                         case 4:
411                         case 6:
412                                 SWAP_LISTENERS(listeners[2], listeners[3], swaplistener);
413                                 // no break
414                         case 2:
415                                 SWAP_LISTENERS(listeners[0], listeners[1], swaplistener);
416                                 break;
417
418                         default:
419                         case 1:
420                                 // Nothing to do
421                                 break;
422                 }
423         }
424
425         // Sanity check
426         if (snd_channellayout.integer < SND_CHANNELLAYOUT_AUTO ||
427                 snd_channellayout.integer > SND_CHANNELLAYOUT_ALSA)
428                 Cvar_SetValueQuick (&snd_channellayout, SND_CHANNELLAYOUT_STANDARD);
429
430         if (snd_channellayout.integer == SND_CHANNELLAYOUT_AUTO)
431         {
432                 // If we're in the sound engine initialization
433                 if (current_channellayout_used == SND_CHANNELLAYOUT_AUTO)
434                 {
435                         layout = SND_CHANNELLAYOUT_STANDARD;
436                         Cvar_SetValueQuick (&snd_channellayout, layout);
437                 }
438                 else
439                         layout = current_channellayout_used;
440         }
441         else
442                 layout = snd_channellayout.integer;
443
444         // Convert our layout (= ALSA) to the standard layout if necessary
445         if (snd_speakerlayout.channels == 6 || snd_speakerlayout.channels == 8)
446         {
447                 if (layout == SND_CHANNELLAYOUT_STANDARD)
448                 {
449                         SWAP_LISTENERS(listeners[2], listeners[4], swaplistener);
450                         SWAP_LISTENERS(listeners[3], listeners[5], swaplistener);
451                 }
452
453                 Con_Printf("S_SetChannelLayout: using %s speaker layout for 3D sound\n",
454                                    (layout == SND_CHANNELLAYOUT_ALSA) ? "ALSA" : "standard");
455         }
456
457         current_swapstereo = snd_swapstereo.integer;
458         current_channellayout = snd_channellayout.integer;
459         current_channellayout_used = layout;
460 }
461
462
463 void S_Startup (void)
464 {
465         qboolean fixed_speed, fixed_width, fixed_channels;
466         snd_format_t chosen_fmt;
467         static snd_format_t prev_render_format = {0, 0, 0};
468         const char* env;
469         int i;
470
471         if (!snd_initialized.integer)
472                 return;
473
474         fixed_speed = false;
475         fixed_width = false;
476         fixed_channels = false;
477
478         // Get the starting sound format from the cvars
479         chosen_fmt.speed = snd_speed.integer;
480         chosen_fmt.width = snd_width.integer;
481         chosen_fmt.channels = snd_channels.integer;
482
483         // Check the environment variables to see if the player wants a particular sound format
484         env = getenv("QUAKE_SOUND_CHANNELS");
485         if (env != NULL)
486         {
487                 chosen_fmt.channels = atoi (env);
488                 fixed_channels = true;
489         }
490         env = getenv("QUAKE_SOUND_SPEED");
491         if (env != NULL)
492         {
493                 chosen_fmt.speed = atoi (env);
494                 fixed_speed = true;
495         }
496         env = getenv("QUAKE_SOUND_SAMPLEBITS");
497         if (env != NULL)
498         {
499                 chosen_fmt.width = atoi (env) / 8;
500                 fixed_width = true;
501         }
502
503         // Parse the command line to see if the player wants a particular sound format
504 // COMMANDLINEOPTION: Sound: -sndquad sets sound output to 4 channel surround
505         if (COM_CheckParm ("-sndquad") != 0)
506         {
507                 chosen_fmt.channels = 4;
508                 fixed_channels = true;
509         }
510 // COMMANDLINEOPTION: Sound: -sndstereo sets sound output to stereo
511         else if (COM_CheckParm ("-sndstereo") != 0)
512         {
513                 chosen_fmt.channels = 2;
514                 fixed_channels = true;
515         }
516 // COMMANDLINEOPTION: Sound: -sndmono sets sound output to mono
517         else if (COM_CheckParm ("-sndmono") != 0)
518         {
519                 chosen_fmt.channels = 1;
520                 fixed_channels = true;
521         }
522 // COMMANDLINEOPTION: Sound: -sndspeed <hz> chooses sound output rate (supported values are 48000, 44100, 32000, 24000, 22050, 16000, 11025 (quake), 8000)
523         i = COM_CheckParm ("-sndspeed");
524         if (0 < i && i < com_argc - 1)
525         {
526                 chosen_fmt.speed = atoi (com_argv[i + 1]);
527                 fixed_speed = true;
528         }
529 // COMMANDLINEOPTION: Sound: -sndbits <bits> chooses 8 bit or 16 bit sound output
530         i = COM_CheckParm ("-sndbits");
531         if (0 < i && i < com_argc - 1)
532         {
533                 chosen_fmt.width = atoi (com_argv[i + 1]) / 8;
534                 fixed_width = true;
535         }
536
537         // You can't change sound speed after start time (not yet supported)
538         if (prev_render_format.speed != 0)
539         {
540                 fixed_speed = true;
541                 if (chosen_fmt.speed != prev_render_format.speed)
542                 {
543                         Con_Printf("S_Startup: sound speed has changed! This is NOT supported yet. Falling back to previous speed (%u Hz)\n",
544                                            prev_render_format.speed);
545                         chosen_fmt.speed = prev_render_format.speed;
546                 }
547         }
548
549         // Sanity checks
550         if (chosen_fmt.speed < SND_MIN_SPEED)
551         {
552                 chosen_fmt.speed = SND_MIN_SPEED;
553                 fixed_speed = false;
554         }
555         else if (chosen_fmt.speed > SND_MAX_SPEED)
556         {
557                 chosen_fmt.speed = SND_MAX_SPEED;
558                 fixed_speed = false;
559         }
560
561         if (chosen_fmt.width < SND_MIN_WIDTH)
562         {
563                 chosen_fmt.width = SND_MIN_WIDTH;
564                 fixed_width = false;
565         }
566         else if (chosen_fmt.width > SND_MAX_WIDTH)
567         {
568                 chosen_fmt.width = SND_MAX_WIDTH;
569                 fixed_width = false;
570         }
571
572         if (chosen_fmt.channels < SND_MIN_CHANNELS)
573         {
574                 chosen_fmt.channels = SND_MIN_CHANNELS;
575                 fixed_channels = false;
576         }
577         else if (chosen_fmt.channels > SND_MAX_CHANNELS)
578         {
579                 chosen_fmt.channels = SND_MAX_CHANNELS;
580                 fixed_channels = false;
581         }
582
583         // create the sound buffer used for sumitting the samples to the plaform-dependent module
584         if (!simsound)
585         {
586                 snd_format_t suggest_fmt;
587                 qboolean accepted;
588
589                 accepted = false;
590                 do
591                 {
592                         Con_DPrintf("S_Startup: initializing sound output format: %dHz, %d bit, %d channels...\n",
593                                                 chosen_fmt.speed, chosen_fmt.width * 8,
594                                                 chosen_fmt.channels);
595
596                         memset(&suggest_fmt, 0, sizeof(suggest_fmt));
597                         accepted = SndSys_Init(&chosen_fmt, &suggest_fmt);
598
599                         if (!accepted)
600                         {
601                                 Con_DPrintf("S_Startup: sound output initialization FAILED\n");
602
603                                 // If the module is suggesting another one
604                                 if (suggest_fmt.speed != 0)
605                                 {
606                                         memcpy(&chosen_fmt, &suggest_fmt, sizeof(chosen_fmt));
607                                         Con_Printf ("           Driver has suggested %dHz, %d bit, %d channels. Retrying...\n",
608                                                                 suggest_fmt.speed, suggest_fmt.width * 8,
609                                                                 suggest_fmt.channels);
610                                 }
611                                 // Else, try to find a less resource-demanding format
612                                 else if (!S_ChooseCheaperFormat (&chosen_fmt, fixed_speed, fixed_width, fixed_channels))
613                                         break;
614                         }
615                 } while (!accepted);
616
617                 // If we haven't found a suitable format
618                 if (!accepted)
619                 {
620                         Con_Print("S_Startup: SndSys_Init failed.\n");
621                         sound_spatialized = false;
622                         return;
623                 }
624         }
625         else
626         {
627                 snd_renderbuffer = Snd_CreateRingBuffer(&chosen_fmt, 0, NULL);
628                 Con_Print ("S_Startup: simulating sound output\n");
629         }
630
631         memcpy(&prev_render_format, &snd_renderbuffer->format, sizeof(prev_render_format));
632         Con_Printf("Sound format: %dHz, %d channels, %d bits per sample\n",
633                            chosen_fmt.speed, chosen_fmt.channels, chosen_fmt.width * 8);
634
635         // Update the cvars
636         if (snd_speed.integer != (int)chosen_fmt.speed)
637                 Cvar_SetValueQuick(&snd_speed, chosen_fmt.speed);
638         if (snd_width.integer != chosen_fmt.width)
639                 Cvar_SetValueQuick(&snd_width, chosen_fmt.width);
640         if (snd_channels.integer != chosen_fmt.channels)
641                 Cvar_SetValueQuick(&snd_channels, chosen_fmt.channels);
642
643         current_channellayout_used = SND_CHANNELLAYOUT_AUTO;
644         S_SetChannelLayout();
645
646         snd_starttime = realtime;
647
648         // If the sound module has already run, add an extra time to make sure
649         // the sound time doesn't decrease, to not confuse playing SFXs
650         if (oldpaintedtime != 0)
651         {
652                 // The extra time must be a multiple of the render buffer size
653                 // to avoid modifying the current position in the buffer,
654                 // some modules write directly to a shared (DMA) buffer
655                 extrasoundtime = oldpaintedtime + snd_renderbuffer->maxframes - 1;
656                 extrasoundtime -= extrasoundtime % snd_renderbuffer->maxframes;
657                 Con_DPrintf("S_Startup: extra sound time = %u\n", extrasoundtime);
658
659                 soundtime = extrasoundtime;
660         }
661         else
662                 extrasoundtime = 0;
663         snd_renderbuffer->startframe = soundtime;
664         snd_renderbuffer->endframe = soundtime;
665         recording_sound = false;
666 }
667
668 void S_Shutdown(void)
669 {
670         if (snd_renderbuffer == NULL)
671                 return;
672
673         oldpaintedtime = snd_renderbuffer->endframe;
674
675         if (simsound)
676         {
677                 Mem_Free(snd_renderbuffer->ring);
678                 Mem_Free(snd_renderbuffer);
679                 snd_renderbuffer = NULL;
680         }
681         else
682                 SndSys_Shutdown();
683
684         sound_spatialized = false;
685 }
686
687 void S_Restart_f(void)
688 {
689         S_Shutdown();
690         S_Startup();
691 }
692
693 /*
694 ================
695 S_Init
696 ================
697 */
698 void S_Init(void)
699 {
700         Con_DPrint("\nSound Initialization\n");
701
702         Cvar_RegisterVariable(&volume);
703         Cvar_RegisterVariable(&bgmvolume);
704         Cvar_RegisterVariable(&snd_staticvolume);
705
706         Cvar_RegisterVariable(&snd_speed);
707         Cvar_RegisterVariable(&snd_width);
708         Cvar_RegisterVariable(&snd_channels);
709
710 // COMMANDLINEOPTION: Sound: -nosound disables sound (including CD audio)
711         if (COM_CheckParm("-nosound") || COM_CheckParm("-safe"))
712                 return;
713
714         snd_mempool = Mem_AllocPool("sound", 0, NULL);
715
716 // COMMANDLINEOPTION: Sound: -simsound runs sound mixing but with no output
717         if (COM_CheckParm("-simsound"))
718                 simsound = true;
719
720         Cmd_AddCommand("play", S_Play_f, "play a sound at your current location (not heard by anyone else)");
721         Cmd_AddCommand("play2", S_Play2_f, "play a sound globally throughout the level (not heard by anyone else)");
722         Cmd_AddCommand("playvol", S_PlayVol_f, "play a sound at the specified volume level at your current location (not heard by anyone else)");
723         Cmd_AddCommand("stopsound", S_StopAllSounds, "silence");
724         Cmd_AddCommand("soundlist", S_SoundList_f, "list loaded sounds");
725         Cmd_AddCommand("soundinfo", S_SoundInfo_f, "print sound system information (such as channels and speed)");
726         Cmd_AddCommand("snd_restart", S_Restart_f, "restart sound system");
727         Cmd_AddCommand("snd_reload", S_Reload_f, "reload all sound files");
728
729         Cvar_RegisterVariable(&nosound);
730         Cvar_RegisterVariable(&snd_precache);
731         Cvar_RegisterVariable(&snd_initialized);
732         Cvar_RegisterVariable(&snd_streaming);
733         Cvar_RegisterVariable(&ambient_level);
734         Cvar_RegisterVariable(&ambient_fade);
735         Cvar_RegisterVariable(&snd_noextraupdate);
736         Cvar_RegisterVariable(&snd_show);
737         Cvar_RegisterVariable(&_snd_mixahead);
738         Cvar_RegisterVariable(&snd_swapstereo); // for people with backwards sound wiring
739         Cvar_RegisterVariable(&snd_channellayout);
740         Cvar_RegisterVariable(&snd_soundradius);
741
742         Cvar_SetValueQuick(&snd_initialized, true);
743
744         known_sfx = NULL;
745
746         total_channels = MAX_DYNAMIC_CHANNELS + NUM_AMBIENTS;   // no statics
747         memset(channels, 0, MAX_CHANNELS * sizeof(channel_t));
748
749         OGG_OpenLibrary ();
750 }
751
752
753 /*
754 ================
755 S_Terminate
756
757 Shutdown and free all resources
758 ================
759 */
760 void S_Terminate (void)
761 {
762         S_Shutdown ();
763         OGG_CloseLibrary ();
764
765         // Free all SFXs
766         while (known_sfx != NULL)
767                 S_FreeSfx (known_sfx, true);
768
769         Cvar_SetValueQuick (&snd_initialized, false);
770         Mem_FreePool (&snd_mempool);
771 }
772
773
774 /*
775 ==================
776 S_Reload_f
777 ==================
778 */
779 void S_Reload_f (void)
780 {
781         int i;
782
783         // stop any active sounds
784         S_StopAllSounds();
785
786         // because the ambient sounds will be freed, clear the pointers
787         for (i = 0;i < (int)sizeof (ambient_sfxs) / (int)sizeof (ambient_sfxs[0]);i++)
788                 ambient_sfxs[i] = NULL;
789
790         // now free all sounds
791         while (known_sfx != NULL)
792                 S_FreeSfx (known_sfx, true);
793 }
794
795
796 /*
797 ==================
798 S_FindName
799 ==================
800 */
801 sfx_t *S_FindName (const char *name)
802 {
803         sfx_t *sfx;
804
805         if (!snd_initialized.integer)
806                 return NULL;
807
808         if (strlen (name) >= sizeof (sfx->name))
809         {
810                 Con_Printf ("S_FindName: sound name too long (%s)\n", name);
811                 return NULL;
812         }
813
814         // Look for this sound in the list of known sfx
815         // TODO: hash table search?
816         for (sfx = known_sfx; sfx != NULL; sfx = sfx->next)
817                 if(!strcmp (sfx->name, name))
818                         return sfx;
819
820         // Add a sfx_t struct for this sound
821         sfx = (sfx_t *)Mem_Alloc (snd_mempool, sizeof (*sfx));
822         memset (sfx, 0, sizeof(*sfx));
823         strlcpy (sfx->name, name, sizeof (sfx->name));
824         sfx->memsize = sizeof(*sfx);
825         sfx->next = known_sfx;
826         known_sfx = sfx;
827
828         return sfx;
829 }
830
831
832 /*
833 ==================
834 S_FreeSfx
835 ==================
836 */
837 void S_FreeSfx (sfx_t *sfx, qboolean force)
838 {
839         unsigned int i;
840
841         // Never free a locked sfx unless forced
842         if (!force && (sfx->locks > 0 || (sfx->flags & SFXFLAG_PERMANENTLOCK)))
843                 return;
844
845         Con_DPrintf ("S_FreeSfx: freeing %s\n", sfx->name);
846
847         // Remove it from the list of known sfx
848         if (sfx == known_sfx)
849                 known_sfx = known_sfx->next;
850         else
851         {
852                 sfx_t *prev_sfx;
853
854                 for (prev_sfx = known_sfx; prev_sfx != NULL; prev_sfx = prev_sfx->next)
855                         if (prev_sfx->next == sfx)
856                         {
857                                 prev_sfx->next = sfx->next;
858                                 break;
859                         }
860                 if (prev_sfx == NULL)
861                 {
862                         Con_Printf ("S_FreeSfx: Can't find SFX %s in the list!\n", sfx->name);
863                         return;
864                 }
865         }
866
867         // Stop all channels using this sfx
868         for (i = 0; i < total_channels; i++)
869                 if (channels[i].sfx == sfx)
870                         S_StopChannel (i);
871
872         // Free it
873         if (sfx->fetcher != NULL && sfx->fetcher->free != NULL)
874                 sfx->fetcher->free (sfx);
875         Mem_Free (sfx);
876 }
877
878
879 /*
880 ==================
881 S_ServerSounds
882 ==================
883 */
884 void S_ServerSounds (char serversound [][MAX_QPATH], unsigned int numsounds)
885 {
886         sfx_t *sfx;
887         sfx_t *sfxnext;
888         unsigned int i;
889
890         // Start the ambient sounds and make them loop
891         for (i = 0; i < sizeof (ambient_sfxs) / sizeof (ambient_sfxs[0]); i++)
892         {
893                 // Precache it if it's not done (request a lock to make sure it will never be freed)
894                 if (ambient_sfxs[i] == NULL)
895                         ambient_sfxs[i] = S_PrecacheSound (ambient_names[i], false, true);
896                 if (ambient_sfxs[i] != NULL)
897                 {
898                         // Add a lock to the SFX while playing. It will be
899                         // removed by S_StopAllSounds at the end of the level
900                         S_LockSfx (ambient_sfxs[i]);
901
902                         channels[i].sfx = ambient_sfxs[i];
903                         channels[i].flags |= CHANNELFLAG_FORCELOOP;
904                         channels[i].master_vol = 0;
905                 }
906         }
907
908         // Remove 1 lock from all sfx with the SFXFLAG_SERVERSOUND flag, and remove the flag
909         for (sfx = known_sfx; sfx != NULL; sfx = sfx->next)
910                 if (sfx->flags & SFXFLAG_SERVERSOUND)
911                 {
912                         S_UnlockSfx (sfx);
913                         sfx->flags &= ~SFXFLAG_SERVERSOUND;
914                 }
915
916         // Add 1 lock and the SFXFLAG_SERVERSOUND flag to each sfx in "serversound"
917         for (i = 1; i < numsounds; i++)
918         {
919                 sfx = S_FindName (serversound[i]);
920                 if (sfx != NULL)
921                 {
922                         // clear the FILEMISSING flag so that S_LoadSound will try again on a
923                         // previously missing file
924                         sfx->flags &= ~ SFXFLAG_FILEMISSING;
925                         S_LockSfx (sfx);
926                         sfx->flags |= SFXFLAG_SERVERSOUND;
927                 }
928         }
929
930         // Free all unlocked sfx
931         for (sfx = known_sfx;sfx;sfx = sfxnext)
932         {
933                 sfxnext = sfx->next;
934                 S_FreeSfx (sfx, false);
935         }
936 }
937
938
939 /*
940 ==================
941 S_PrecacheSound
942 ==================
943 */
944 sfx_t *S_PrecacheSound (const char *name, qboolean complain, qboolean lock)
945 {
946         sfx_t *sfx;
947
948         if (!snd_initialized.integer)
949                 return NULL;
950
951         if (name == NULL || name[0] == 0)
952                 return NULL;
953
954         sfx = S_FindName (name);
955
956         if (sfx == NULL)
957                 return NULL;
958
959         // clear the FILEMISSING flag so that S_LoadSound will try again on a
960         // previously missing file
961         sfx->flags &= ~ SFXFLAG_FILEMISSING;
962
963         if (lock)
964                 S_LockSfx (sfx);
965
966         if (!nosound.integer && snd_precache.integer)
967                 S_LoadSound(sfx, complain);
968
969         return sfx;
970 }
971
972 /*
973 ==================
974 S_IsSoundPrecached
975 ==================
976 */
977 qboolean S_IsSoundPrecached (const sfx_t *sfx)
978 {
979         return (sfx != NULL && sfx->fetcher != NULL);
980 }
981
982 /*
983 ==================
984 S_LockSfx
985
986 Add a lock to a SFX
987 ==================
988 */
989 void S_LockSfx (sfx_t *sfx)
990 {
991         sfx->locks++;
992 }
993
994 /*
995 ==================
996 S_UnlockSfx
997
998 Remove a lock from a SFX
999 ==================
1000 */
1001 void S_UnlockSfx (sfx_t *sfx)
1002 {
1003         sfx->locks--;
1004 }
1005
1006
1007 /*
1008 ==================
1009 S_BlockSound
1010 ==================
1011 */
1012 void S_BlockSound (void)
1013 {
1014         snd_blocked++;
1015 }
1016
1017
1018 /*
1019 ==================
1020 S_UnblockSound
1021 ==================
1022 */
1023 void S_UnblockSound (void)
1024 {
1025         snd_blocked--;
1026 }
1027
1028
1029 /*
1030 =================
1031 SND_PickChannel
1032
1033 Picks a channel based on priorities, empty slots, number of channels
1034 =================
1035 */
1036 channel_t *SND_PickChannel(int entnum, int entchannel)
1037 {
1038         int ch_idx;
1039         int first_to_die;
1040         int first_life_left, life_left;
1041         channel_t* ch;
1042
1043 // Check for replacement sound, or find the best one to replace
1044         first_to_die = -1;
1045         first_life_left = 0x7fffffff;
1046         for (ch_idx=NUM_AMBIENTS ; ch_idx < NUM_AMBIENTS + MAX_DYNAMIC_CHANNELS ; ch_idx++)
1047         {
1048                 ch = &channels[ch_idx];
1049                 if (entchannel != 0)
1050                 {
1051                         // try to override an existing channel
1052                         if (ch->entnum == entnum && (ch->entchannel == entchannel || entchannel == -1) )
1053                         {
1054                                 // always override sound from same entity
1055                                 first_to_die = ch_idx;
1056                                 break;
1057                         }
1058                 }
1059                 else
1060                 {
1061                         if (!ch->sfx)
1062                         {
1063                                 // no sound on this channel
1064                                 first_to_die = ch_idx;
1065                                 break;
1066                         }
1067                 }
1068
1069                 if (ch->sfx)
1070                 {
1071                         // don't let monster sounds override player sounds
1072                         if (ch->entnum == cl.viewentity && entnum != cl.viewentity)
1073                                 continue;
1074
1075                         // don't override looped sounds
1076                         if ((ch->flags & CHANNELFLAG_FORCELOOP) || ch->sfx->loopstart >= 0)
1077                                 continue;
1078                 }
1079
1080                 life_left = (int)(ch->end - snd_renderbuffer->endframe);
1081                 if (life_left < first_life_left)
1082                 {
1083                         first_life_left = life_left;
1084                         first_to_die = ch_idx;
1085                 }
1086         }
1087
1088         if (first_to_die == -1)
1089                 return NULL;
1090
1091         S_StopChannel (first_to_die);
1092
1093         return &channels[first_to_die];
1094 }
1095
1096 /*
1097 =================
1098 SND_Spatialize
1099
1100 Spatializes a channel
1101 =================
1102 */
1103 void SND_Spatialize(channel_t *ch, qboolean isstatic)
1104 {
1105         int i;
1106         vec_t dist, mastervol, intensity, vol;
1107         vec3_t source_vec;
1108
1109         // update sound origin if we know about the entity
1110         if (ch->entnum > 0 && cls.state == ca_connected && cl.entities[ch->entnum].state_current.active)
1111         {
1112                 //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]);
1113                 VectorCopy(cl.entities[ch->entnum].state_current.origin, ch->origin);
1114                 if (cl.entities[ch->entnum].state_current.modelindex && cl.model_precache[cl.entities[ch->entnum].state_current.modelindex] && cl.model_precache[cl.entities[ch->entnum].state_current.modelindex]->soundfromcenter)
1115                         VectorMAMAM(1.0f, ch->origin, 0.5f, cl.model_precache[cl.entities[ch->entnum].state_current.modelindex]->normalmins, 0.5f, cl.model_precache[cl.entities[ch->entnum].state_current.modelindex]->normalmaxs, ch->origin);
1116         }
1117
1118         mastervol = ch->master_vol;
1119         // Adjust volume of static sounds
1120         if (isstatic)
1121                 mastervol *= snd_staticvolume.value;
1122
1123         // anything coming from the view entity will always be full volume
1124         // LordHavoc: make sounds with ATTN_NONE have no spatialization
1125         if (ch->entnum == cl.viewentity || ch->dist_mult == 0)
1126         {
1127                 for (i = 0;i < SND_LISTENERS;i++)
1128                 {
1129                         vol = mastervol * snd_speakerlayout.listeners[i].ambientvolume;
1130                         ch->listener_volume[i] = (int)bound(0, vol, 255);
1131                 }
1132         }
1133         else
1134         {
1135                 // calculate stereo seperation and distance attenuation
1136                 VectorSubtract(listener_origin, ch->origin, source_vec);
1137                 dist = VectorLength(source_vec);
1138                 intensity = mastervol * (1.0 - dist * ch->dist_mult);
1139                 if (intensity > 0)
1140                 {
1141                         for (i = 0;i < SND_LISTENERS;i++)
1142                         {
1143                                 Matrix4x4_Transform(&listener_matrix[i], ch->origin, source_vec);
1144                                 VectorNormalize(source_vec);
1145                                 vol = intensity * max(0, source_vec[0] * snd_speakerlayout.listeners[i].dotscale + snd_speakerlayout.listeners[i].dotbias);
1146                                 ch->listener_volume[i] = (int)bound(0, vol, 255);
1147                         }
1148                 }
1149                 else
1150                         for (i = 0;i < SND_LISTENERS;i++)
1151                                 ch->listener_volume[i] = 0;
1152         }
1153 }
1154
1155
1156 // =======================================================================
1157 // Start a sound effect
1158 // =======================================================================
1159
1160 void S_PlaySfxOnChannel (sfx_t *sfx, channel_t *target_chan, unsigned int flags, vec3_t origin, float fvol, float attenuation, qboolean isstatic)
1161 {
1162         // Initialize the channel
1163         memset (target_chan, 0, sizeof (*target_chan));
1164         VectorCopy (origin, target_chan->origin);
1165         target_chan->master_vol = (int)(fvol * 255);
1166         target_chan->sfx = sfx;
1167         target_chan->end = snd_renderbuffer->endframe + sfx->total_length;
1168         target_chan->lastptime = snd_renderbuffer->endframe;
1169         target_chan->flags = flags;
1170
1171         // If it's a static sound
1172         if (isstatic)
1173         {
1174                 if (sfx->loopstart == -1)
1175                         Con_DPrintf("Quake compatibility warning: Static sound \"%s\" is not looped\n", sfx->name);
1176                 target_chan->dist_mult = attenuation / (64.0f * snd_soundradius.value);
1177         }
1178         else
1179                 target_chan->dist_mult = attenuation / snd_soundradius.value;
1180
1181         // Lock the SFX during play
1182         S_LockSfx (sfx);
1183 }
1184
1185
1186 int S_StartSound (int entnum, int entchannel, sfx_t *sfx, vec3_t origin, float fvol, float attenuation)
1187 {
1188         channel_t *target_chan, *check;
1189         int             ch_idx;
1190         int             skip;
1191
1192         if (snd_renderbuffer == NULL || sfx == NULL || nosound.integer)
1193                 return -1;
1194
1195         if (sfx->fetcher == NULL)
1196                 return -1;
1197
1198         if (entnum && entnum >= cl.max_entities)
1199                 CL_ExpandEntities(entnum);
1200
1201         // Pick a channel to play on
1202         target_chan = SND_PickChannel(entnum, entchannel);
1203         if (!target_chan)
1204                 return -1;
1205
1206         S_PlaySfxOnChannel (sfx, target_chan, CHANNELFLAG_NONE, origin, fvol, attenuation, false);
1207         target_chan->entnum = entnum;
1208         target_chan->entchannel = entchannel;
1209
1210         SND_Spatialize(target_chan, false);
1211
1212         // if an identical sound has also been started this frame, offset the pos
1213         // a bit to keep it from just making the first one louder
1214         check = &channels[NUM_AMBIENTS];
1215         for (ch_idx=NUM_AMBIENTS ; ch_idx < NUM_AMBIENTS + MAX_DYNAMIC_CHANNELS ; ch_idx++, check++)
1216         {
1217                 if (check == target_chan)
1218                         continue;
1219                 if (check->sfx == sfx && !check->pos)
1220                 {
1221                         skip = (int)(0.1 * snd_renderbuffer->format.speed);
1222                         if (skip > (int)sfx->total_length)
1223                                 skip = (int)sfx->total_length;
1224                         if (skip > 0)
1225                                 skip = rand() % skip;
1226                         target_chan->pos += skip;
1227                         target_chan->end -= skip;
1228                         break;
1229                 }
1230         }
1231
1232         return (target_chan - channels);
1233 }
1234
1235 void S_StopChannel (unsigned int channel_ind)
1236 {
1237         channel_t *ch;
1238
1239         if (channel_ind >= total_channels)
1240                 return;
1241
1242         ch = &channels[channel_ind];
1243         if (ch->sfx != NULL)
1244         {
1245                 sfx_t *sfx = ch->sfx;
1246
1247                 if (sfx->fetcher != NULL)
1248                 {
1249                         snd_fetcher_endsb_t fetcher_endsb = sfx->fetcher->endsb;
1250                         if (fetcher_endsb != NULL)
1251                                 fetcher_endsb (ch);
1252                 }
1253
1254                 // Remove the lock it holds
1255                 S_UnlockSfx (sfx);
1256
1257                 ch->sfx = NULL;
1258         }
1259         ch->end = 0;
1260 }
1261
1262
1263 qboolean S_SetChannelFlag (unsigned int ch_ind, unsigned int flag, qboolean value)
1264 {
1265         if (ch_ind >= total_channels)
1266                 return false;
1267
1268         if (flag != CHANNELFLAG_FORCELOOP &&
1269                 flag != CHANNELFLAG_PAUSED &&
1270                 flag != CHANNELFLAG_FULLVOLUME)
1271                 return false;
1272
1273         if (value)
1274                 channels[ch_ind].flags |= flag;
1275         else
1276                 channels[ch_ind].flags &= ~flag;
1277
1278         return true;
1279 }
1280
1281 void S_StopSound(int entnum, int entchannel)
1282 {
1283         unsigned int i;
1284
1285         for (i = 0; i < MAX_DYNAMIC_CHANNELS; i++)
1286                 if (channels[i].entnum == entnum && channels[i].entchannel == entchannel)
1287                 {
1288                         S_StopChannel (i);
1289                         return;
1290                 }
1291 }
1292
1293 extern void CDAudio_Stop(void);
1294 void S_StopAllSounds (void)
1295 {
1296         unsigned int i;
1297
1298         // TOCHECK: is this test necessary?
1299         if (snd_renderbuffer == NULL)
1300                 return;
1301
1302         // stop CD audio because it may be using a faketrack
1303         CDAudio_Stop();
1304
1305         for (i = 0; i < total_channels; i++)
1306                 S_StopChannel (i);
1307
1308         total_channels = MAX_DYNAMIC_CHANNELS + NUM_AMBIENTS;   // no statics
1309         memset(channels, 0, MAX_CHANNELS * sizeof(channel_t));
1310
1311         // Mute the contents of the submittion buffer
1312         if (simsound || SndSys_LockRenderBuffer ())
1313         {
1314                 int clear;
1315                 size_t memsize;
1316
1317                 clear = (snd_renderbuffer->format.width == 1) ? 0x80 : 0;
1318                 memsize = snd_renderbuffer->maxframes * snd_renderbuffer->format.width * snd_renderbuffer->format.channels;
1319                 memset(snd_renderbuffer->ring, clear, memsize);
1320
1321                 if (!simsound)
1322                         SndSys_UnlockRenderBuffer ();
1323         }
1324 }
1325
1326 void S_PauseGameSounds (qboolean toggle)
1327 {
1328         unsigned int i;
1329
1330         for (i = 0; i < total_channels; i++)
1331         {
1332                 channel_t *ch;
1333
1334                 ch = &channels[i];
1335                 if (ch->sfx != NULL && ! (ch->flags & CHANNELFLAG_LOCALSOUND))
1336                         S_SetChannelFlag (i, CHANNELFLAG_PAUSED, toggle);
1337         }
1338 }
1339
1340 void S_SetChannelVolume (unsigned int ch_ind, float fvol)
1341 {
1342         channels[ch_ind].master_vol = (int)(fvol * 255.0f);
1343 }
1344
1345
1346 /*
1347 =================
1348 S_StaticSound
1349 =================
1350 */
1351 void S_StaticSound (sfx_t *sfx, vec3_t origin, float fvol, float attenuation)
1352 {
1353         channel_t       *target_chan;
1354
1355         if (snd_renderbuffer == NULL || sfx == NULL || nosound.integer)
1356                 return;
1357         if (!sfx->fetcher)
1358         {
1359                 Con_DPrintf ("S_StaticSound: \"%s\" hasn't been precached\n", sfx->name);
1360                 return;
1361         }
1362
1363         if (total_channels == MAX_CHANNELS)
1364         {
1365                 Con_Print("S_StaticSound: total_channels == MAX_CHANNELS\n");
1366                 return;
1367         }
1368
1369         target_chan = &channels[total_channels++];
1370         S_PlaySfxOnChannel (sfx, target_chan, CHANNELFLAG_FORCELOOP, origin, fvol, attenuation, true);
1371
1372         SND_Spatialize (target_chan, true);
1373 }
1374
1375
1376 /*
1377 ===================
1378 S_UpdateAmbientSounds
1379 ===================
1380 */
1381 void S_UpdateAmbientSounds (void)
1382 {
1383         int                     i;
1384         int                     vol;
1385         int                     ambient_channel;
1386         channel_t       *chan;
1387         unsigned char           ambientlevels[NUM_AMBIENTS];
1388
1389         memset(ambientlevels, 0, sizeof(ambientlevels));
1390         if (cl.worldmodel && cl.worldmodel->brush.AmbientSoundLevelsForPoint)
1391                 cl.worldmodel->brush.AmbientSoundLevelsForPoint(cl.worldmodel, listener_origin, ambientlevels, sizeof(ambientlevels));
1392
1393         // Calc ambient sound levels
1394         for (ambient_channel = 0 ; ambient_channel< NUM_AMBIENTS ; ambient_channel++)
1395         {
1396                 chan = &channels[ambient_channel];
1397                 if (chan->sfx == NULL || chan->sfx->fetcher == NULL)
1398                         continue;
1399
1400                 vol = (int)ambientlevels[ambient_channel];
1401                 if (vol < 8)
1402                         vol = 0;
1403
1404                 // Don't adjust volume too fast
1405                 // FIXME: this rounds off to an int each frame, meaning there is little to no fade at extremely high framerates!
1406                 if (chan->master_vol < vol)
1407                 {
1408                         chan->master_vol += (int)(cl.realframetime * ambient_fade.value);
1409                         if (chan->master_vol > vol)
1410                                 chan->master_vol = vol;
1411                 }
1412                 else if (chan->master_vol > vol)
1413                 {
1414                         chan->master_vol -= (int)(cl.realframetime * ambient_fade.value);
1415                         if (chan->master_vol < vol)
1416                                 chan->master_vol = vol;
1417                 }
1418
1419                 for (i = 0;i < SND_LISTENERS;i++)
1420                         chan->listener_volume[i] = (int)(chan->master_vol * ambient_level.value * snd_speakerlayout.listeners[i].ambientvolume);
1421         }
1422 }
1423
1424 static void S_PaintAndSubmit (void)
1425 {
1426         unsigned int newsoundtime, paintedtime, endtime, maxtime, usedframes;
1427
1428         if (snd_renderbuffer == NULL || nosound.integer)
1429                 return;
1430
1431         if (snd_blocked > 0 && !(cls.capturevideo.soundrate && !cls.capturevideo.realtime))
1432                 return;
1433
1434         // Update sound time
1435         if (cls.capturevideo.soundrate && !cls.capturevideo.realtime) // SUPER NASTY HACK to record non-realtime sound
1436                 newsoundtime = (unsigned int)((double)cls.capturevideo.frame * (double)snd_renderbuffer->format.speed / (double)cls.capturevideo.framerate);
1437         else if (simsound)
1438                 newsoundtime = (unsigned int)((realtime - snd_starttime) * (double)snd_renderbuffer->format.speed);
1439         else
1440                 newsoundtime = SndSys_GetSoundTime();
1441
1442         newsoundtime += extrasoundtime;
1443         if (newsoundtime < soundtime)
1444         {
1445                 if ((cls.capturevideo.soundrate != 0) != recording_sound)
1446                 {
1447                         unsigned int additionaltime;
1448
1449                         // add some time to extrasoundtime make newsoundtime higher
1450
1451                         // The extra time must be a multiple of the render buffer size
1452                         // to avoid modifying the current position in the buffer,
1453                         // some modules write directly to a shared (DMA) buffer
1454                         additionaltime = (soundtime - newsoundtime) + snd_renderbuffer->maxframes - 1;
1455                         additionaltime -= additionaltime % snd_renderbuffer->maxframes;
1456
1457                         extrasoundtime += additionaltime;
1458                         newsoundtime += additionaltime;
1459                         Con_DPrintf("S_PaintAndSubmit: new extra sound time = %u\n",
1460                                                 extrasoundtime);
1461                 }
1462                 else
1463                         Con_Printf("S_PaintAndSubmit: WARNING: newsoundtime < soundtime (%u < %u)\n",
1464                                            newsoundtime, soundtime);
1465         }
1466         soundtime = newsoundtime;
1467         recording_sound = (cls.capturevideo.soundrate != 0);
1468
1469         // Check to make sure that we haven't overshot
1470         paintedtime = snd_renderbuffer->endframe;
1471         if (paintedtime < soundtime)
1472                 paintedtime = soundtime;
1473
1474         // mix ahead of current position
1475         endtime = soundtime + (unsigned int)(_snd_mixahead.value * (float)snd_renderbuffer->format.speed);
1476         usedframes = snd_renderbuffer->endframe - snd_renderbuffer->startframe;
1477         maxtime = paintedtime + snd_renderbuffer->maxframes - usedframes;
1478         endtime = min(endtime, maxtime);
1479
1480         S_PaintChannels(snd_renderbuffer, paintedtime, endtime);
1481
1482         if (simsound)
1483                 snd_renderbuffer->startframe = snd_renderbuffer->endframe;
1484         else
1485                 SndSys_Submit();
1486 }
1487
1488 /*
1489 ============
1490 S_Update
1491
1492 Called once each time through the main loop
1493 ============
1494 */
1495 void S_Update(const matrix4x4_t *listenermatrix)
1496 {
1497         unsigned int i, j, total;
1498         channel_t *ch, *combine;
1499         matrix4x4_t basematrix, rotatematrix;
1500
1501         if (snd_renderbuffer == NULL || nosound.integer)
1502                 return;
1503
1504         if (snd_blocked > 0 && !(cls.capturevideo.soundrate && !cls.capturevideo.realtime))
1505                 return;
1506
1507         // If snd_swapstereo or snd_channellayout has changed, recompute the channel layout
1508         if (current_swapstereo != snd_swapstereo.integer ||
1509                 current_channellayout != snd_channellayout.integer)
1510                 S_SetChannelLayout();
1511
1512         Matrix4x4_Invert_Simple(&basematrix, listenermatrix);
1513         Matrix4x4_OriginFromMatrix(listenermatrix, listener_origin);
1514
1515         // calculate the current matrices
1516         for (j = 0;j < SND_LISTENERS;j++)
1517         {
1518                 Matrix4x4_CreateFromQuakeEntity(&rotatematrix, 0, 0, 0, 0, -snd_speakerlayout.listeners[j].yawangle, 0, 1);
1519                 Matrix4x4_Concat(&listener_matrix[j], &rotatematrix, &basematrix);
1520                 // I think this should now do this:
1521                 //   1. create a rotation matrix for rotating by e.g. -90 degrees CCW
1522                 //      (note: the matrix will rotate the OBJECT, not the VIEWER, so its
1523                 //       angle has to be taken negative)
1524                 //   2. create a transform which first rotates and moves its argument
1525                 //      into the player's view coordinates (using basematrix which is
1526                 //      an inverted "absolute" listener matrix), then applies the
1527                 //      rotation matrix for the ear
1528                 // Isn't Matrix4x4_CreateFromQuakeEntity a bit misleading because this
1529                 // does not actually refer to an entity?
1530         }
1531
1532         // update general area ambient sound sources
1533         S_UpdateAmbientSounds ();
1534
1535         combine = NULL;
1536
1537         // update spatialization for static and dynamic sounds
1538         ch = channels+NUM_AMBIENTS;
1539         for (i=NUM_AMBIENTS ; i<total_channels; i++, ch++)
1540         {
1541                 if (!ch->sfx)
1542                         continue;
1543
1544                 // respatialize channel
1545                 SND_Spatialize(ch, i >= MAX_DYNAMIC_CHANNELS + NUM_AMBIENTS);
1546
1547                 // try to combine static sounds with a previous channel of the same
1548                 // sound effect so we don't mix five torches every frame
1549                 if (i > MAX_DYNAMIC_CHANNELS + NUM_AMBIENTS)
1550                 {
1551                         // no need to merge silent channels
1552                         for (j = 0;j < SND_LISTENERS;j++)
1553                                 if (ch->listener_volume[j])
1554                                         break;
1555                         if (j == SND_LISTENERS)
1556                                 continue;
1557                         // if the last combine chosen isn't suitable, find a new one
1558                         if (!(combine && combine != ch && combine->sfx == ch->sfx))
1559                         {
1560                                 // search for one
1561                                 combine = NULL;
1562                                 for (j = MAX_DYNAMIC_CHANNELS + NUM_AMBIENTS;j < i;j++)
1563                                 {
1564                                         if (channels[j].sfx == ch->sfx)
1565                                         {
1566                                                 combine = channels + j;
1567                                                 break;
1568                                         }
1569                                 }
1570                         }
1571                         if (combine && combine != ch && combine->sfx == ch->sfx)
1572                         {
1573                                 for (j = 0;j < SND_LISTENERS;j++)
1574                                 {
1575                                         combine->listener_volume[j] += ch->listener_volume[j];
1576                                         ch->listener_volume[j] = 0;
1577                                 }
1578                         }
1579                 }
1580         }
1581
1582         sound_spatialized = true;
1583
1584         // debugging output
1585         if (snd_show.integer)
1586         {
1587                 total = 0;
1588                 ch = channels;
1589                 for (i=0 ; i<total_channels; i++, ch++)
1590                 {
1591                         if (ch->sfx)
1592                         {
1593                                 for (j = 0;j < SND_LISTENERS;j++)
1594                                         if (ch->listener_volume[j])
1595                                                 break;
1596                                 if (j < SND_LISTENERS)
1597                                         total++;
1598                         }
1599                 }
1600
1601                 Con_Printf("----(%u)----\n", total);
1602         }
1603
1604         S_PaintAndSubmit();
1605 }
1606
1607 void S_ExtraUpdate (void)
1608 {
1609         if (snd_noextraupdate.integer || !sound_spatialized)
1610                 return;
1611
1612         S_PaintAndSubmit();
1613 }
1614
1615 qboolean S_LocalSound (const char *sound)
1616 {
1617         sfx_t   *sfx;
1618         int             ch_ind;
1619
1620         if (!snd_initialized.integer || nosound.integer)
1621                 return true;
1622
1623         sfx = S_PrecacheSound (sound, true, false);
1624         if (!sfx)
1625         {
1626                 Con_Printf("S_LocalSound: can't precache %s\n", sound);
1627                 return false;
1628         }
1629
1630         // Local sounds must not be freed
1631         sfx->flags |= SFXFLAG_PERMANENTLOCK;
1632
1633         ch_ind = S_StartSound (cl.viewentity, 0, sfx, vec3_origin, 1, 0);
1634         if (ch_ind < 0)
1635                 return false;
1636
1637         channels[ch_ind].flags |= CHANNELFLAG_LOCALSOUND;
1638         return true;
1639 }