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1 | /* Emacs style mode select -*- C++ -*- | ||
2 | *----------------------------------------------------------------------------- | ||
3 | * | ||
4 | * | ||
5 | * PrBoom: a Doom port merged with LxDoom and LSDLDoom | ||
6 | * based on BOOM, a modified and improved DOOM engine | ||
7 | * Copyright (C) 1999 by | ||
8 | * id Software, Chi Hoang, Lee Killough, Jim Flynn, Rand Phares, Ty Halderman | ||
9 | * Copyright (C) 1999-2000 by | ||
10 | * Jess Haas, Nicolas Kalkhof, Colin Phipps, Florian Schulze | ||
11 | * Copyright 2005, 2006 by | ||
12 | * Florian Schulze, Colin Phipps, Neil Stevens, Andrey Budko | ||
13 | * | ||
14 | * This program is free software; you can redistribute it and/or | ||
15 | * modify it under the terms of the GNU General Public License | ||
16 | * as published by the Free Software Foundation; either version 2 | ||
17 | * of the License, or (at your option) any later version. | ||
18 | * | ||
19 | * This program is distributed in the hope that it will be useful, | ||
20 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
21 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
22 | * GNU General Public License for more details. | ||
23 | * | ||
24 | * You should have received a copy of the GNU General Public License | ||
25 | * along with this program; if not, write to the Free Software | ||
26 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA | ||
27 | * 02111-1307, USA. | ||
28 | * | ||
29 | * DESCRIPTION: Platform-independent sound code | ||
30 | * | ||
31 | *-----------------------------------------------------------------------------*/ | ||
32 | |||
33 | // killough 3/7/98: modified to allow arbitrary listeners in spy mode | ||
34 | // killough 5/2/98: reindented, removed useless code, beautified | ||
35 | |||
36 | #ifdef HAVE_CONFIG_H | ||
37 | #include "config.h" | ||
38 | #endif | ||
39 | |||
40 | #include "doomstat.h" | ||
41 | #include "s_sound.h" | ||
42 | #include "i_sound.h" | ||
43 | #include "i_system.h" | ||
44 | #include "d_main.h" | ||
45 | #include "r_main.h" | ||
46 | #include "m_random.h" | ||
47 | #include "w_wad.h" | ||
48 | #include "lprintf.h" | ||
49 | |||
50 | // when to clip out sounds | ||
51 | // Does not fit the large outdoor areas. | ||
52 | #define S_CLIPPING_DIST (1200<<FRACBITS) | ||
53 | |||
54 | // Distance tp origin when sounds should be maxed out. | ||
55 | // This should relate to movement clipping resolution | ||
56 | // (see BLOCKMAP handling). | ||
57 | // Originally: (200*0x10000). | ||
58 | |||
59 | #define S_CLOSE_DIST (160<<FRACBITS) | ||
60 | #define S_ATTENUATOR ((S_CLIPPING_DIST-S_CLOSE_DIST)>>FRACBITS) | ||
61 | |||
62 | // Adjustable by menu. | ||
63 | #define NORM_PITCH 128 | ||
64 | #define NORM_PRIORITY 64 | ||
65 | #define NORM_SEP 128 | ||
66 | #define S_STEREO_SWING (96<<FRACBITS) | ||
67 | |||
68 | const char* S_music_files[NUMMUSIC]; // cournia - stores music file names | ||
69 | |||
70 | typedef struct | ||
71 | { | ||
72 | sfxinfo_t *sfxinfo; // sound information (if null, channel avail.) | ||
73 | void *origin; // origin of sound | ||
74 | int handle; // handle of the sound being played | ||
75 | int is_pickup; // killough 4/25/98: whether sound is a player's weapon | ||
76 | } channel_t; | ||
77 | |||
78 | // the set of channels available | ||
79 | static channel_t *channels; | ||
80 | |||
81 | // These are not used, but should be (menu). | ||
82 | // Maximum volume of a sound effect. | ||
83 | // Internal default is max out of 0-15. | ||
84 | int snd_SfxVolume = 15; | ||
85 | |||
86 | // Maximum volume of music. Useless so far. | ||
87 | int snd_MusicVolume = 15; | ||
88 | |||
89 | // whether songs are mus_paused | ||
90 | static boolean mus_paused; | ||
91 | |||
92 | // music currently being played | ||
93 | static musicinfo_t *mus_playing; | ||
94 | |||
95 | // following is set | ||
96 | // by the defaults code in M_misc: | ||
97 | // number of channels available | ||
98 | int default_numChannels; | ||
99 | int numChannels; | ||
100 | |||
101 | //jff 3/17/98 to keep track of last IDMUS specified music num | ||
102 | int idmusnum; | ||
103 | |||
104 | // | ||
105 | // Internals. | ||
106 | // | ||
107 | |||
108 | void S_StopChannel(int cnum); | ||
109 | |||
110 | int S_AdjustSoundParams(mobj_t *listener, mobj_t *source, | ||
111 | int *vol, int *sep, int *pitch); | ||
112 | |||
113 | static int S_getChannel(void *origin, sfxinfo_t *sfxinfo, int is_pickup); | ||
114 | |||
115 | // Initializes sound stuff, including volume | ||
116 | // Sets channels, SFX and music volume, | ||
117 | // allocates channel buffer, sets S_sfx lookup. | ||
118 | // | ||
119 | |||
120 | void S_Init(int sfxVolume, int musicVolume) | ||
121 | { | ||
122 | //jff 1/22/98 skip sound init if sound not enabled | ||
123 | numChannels = default_numChannels; | ||
124 | if (snd_card && !nosfxparm) | ||
125 | { | ||
126 | int i; | ||
127 | |||
128 | lprintf(LO_CONFIRM, "S_Init: default sfx volume %d\n", sfxVolume); | ||
129 | |||
130 | // Whatever these did with DMX, these are rather dummies now. | ||
131 | I_SetChannels(); | ||
132 | |||
133 | S_SetSfxVolume(sfxVolume); | ||
134 | |||
135 | // Allocating the internal channels for mixing | ||
136 | // (the maximum numer of sounds rendered | ||
137 | // simultaneously) within zone memory. | ||
138 | // CPhipps - calloc | ||
139 | channels = | ||
140 | (channel_t *) calloc(numChannels,sizeof(channel_t)); | ||
141 | |||
142 | // Note that sounds have not been cached (yet). | ||
143 | for (i=1 ; i<NUMSFX ; i++) | ||
144 | S_sfx[i].lumpnum = S_sfx[i].usefulness = -1; | ||
145 | } | ||
146 | |||
147 | // CPhipps - music init reformatted | ||
148 | if (mus_card && !nomusicparm) { | ||
149 | S_SetMusicVolume(musicVolume); | ||
150 | |||
151 | // no sounds are playing, and they are not mus_paused | ||
152 | mus_paused = 0; | ||
153 | } | ||
154 | } | ||
155 | |||
156 | void S_Stop(void) | ||
157 | { | ||
158 | int cnum; | ||
159 | |||
160 | //jff 1/22/98 skip sound init if sound not enabled | ||
161 | if (snd_card && !nosfxparm) | ||
162 | for (cnum=0 ; cnum<numChannels ; cnum++) | ||
163 | if (channels[cnum].sfxinfo) | ||
164 | S_StopChannel(cnum); | ||
165 | } | ||
166 | |||
167 | // | ||
168 | // Per level startup code. | ||
169 | // Kills playing sounds at start of level, | ||
170 | // determines music if any, changes music. | ||
171 | // | ||
172 | void S_Start(void) | ||
173 | { | ||
174 | int mnum; | ||
175 | |||
176 | // kill all playing sounds at start of level | ||
177 | // (trust me - a good idea) | ||
178 | |||
179 | S_Stop(); | ||
180 | |||
181 | //jff 1/22/98 return if music is not enabled | ||
182 | if (!mus_card || nomusicparm) | ||
183 | return; | ||
184 | |||
185 | // start new music for the level | ||
186 | mus_paused = 0; | ||
187 | |||
188 | if (idmusnum!=-1) | ||
189 | mnum = idmusnum; //jff 3/17/98 reload IDMUS music if not -1 | ||
190 | else | ||
191 | if (gamemode == commercial) | ||
192 | mnum = mus_runnin + gamemap - 1; | ||
193 | else | ||
194 | { | ||
195 | static const int spmus[] = // Song - Who? - Where? | ||
196 | { | ||
197 | mus_e3m4, // American e4m1 | ||
198 | mus_e3m2, // Romero e4m2 | ||
199 | mus_e3m3, // Shawn e4m3 | ||
200 | mus_e1m5, // American e4m4 | ||
201 | mus_e2m7, // Tim e4m5 | ||
202 | mus_e2m4, // Romero e4m6 | ||
203 | mus_e2m6, // J.Anderson e4m7 CHIRON.WAD | ||
204 | mus_e2m5, // Shawn e4m8 | ||
205 | mus_e1m9 // Tim e4m9 | ||
206 | }; | ||
207 | |||
208 | if (gameepisode < 4) | ||
209 | mnum = mus_e1m1 + (gameepisode-1)*9 + gamemap-1; | ||
210 | else | ||
211 | mnum = spmus[gamemap-1]; | ||
212 | } | ||
213 | S_ChangeMusic(mnum, true); | ||
214 | } | ||
215 | |||
216 | void S_StartSoundAtVolume(void *origin_p, int sfx_id, int volume) | ||
217 | { | ||
218 | int sep, pitch, priority, cnum, is_pickup; | ||
219 | sfxinfo_t *sfx; | ||
220 | mobj_t *origin = (mobj_t *) origin_p; | ||
221 | |||
222 | //jff 1/22/98 return if sound is not enabled | ||
223 | if (!snd_card || nosfxparm) | ||
224 | return; | ||
225 | |||
226 | is_pickup = sfx_id & PICKUP_SOUND || sfx_id == sfx_oof || (compatibility_level >= prboom_2_compatibility && sfx_id == sfx_noway); // killough 4/25/98 | ||
227 | sfx_id &= ~PICKUP_SOUND; | ||
228 | |||
229 | // check for bogus sound # | ||
230 | if (sfx_id < 1 || sfx_id > NUMSFX) | ||
231 | I_Error("S_StartSoundAtVolume: Bad sfx #: %d", sfx_id); | ||
232 | |||
233 | sfx = &S_sfx[sfx_id]; | ||
234 | |||
235 | // Initialize sound parameters | ||
236 | if (sfx->link) | ||
237 | { | ||
238 | pitch = sfx->pitch; | ||
239 | priority = sfx->priority; | ||
240 | volume += sfx->volume; | ||
241 | |||
242 | if (volume < 1) | ||
243 | return; | ||
244 | |||
245 | if (volume > snd_SfxVolume) | ||
246 | volume = snd_SfxVolume; | ||
247 | } | ||
248 | else | ||
249 | { | ||
250 | pitch = NORM_PITCH; | ||
251 | priority = NORM_PRIORITY; | ||
252 | } | ||
253 | |||
254 | // Check to see if it is audible, modify the params | ||
255 | // killough 3/7/98, 4/25/98: code rearranged slightly | ||
256 | |||
257 | if (!origin || origin == players[displayplayer].mo) { | ||
258 | sep = NORM_SEP; | ||
259 | volume *= 8; | ||
260 | } else | ||
261 | if (!S_AdjustSoundParams(players[displayplayer].mo, origin, &volume, | ||
262 | &sep, &pitch)) | ||
263 | return; | ||
264 | else | ||
265 | if ( origin->x == players[displayplayer].mo->x && | ||
266 | origin->y == players[displayplayer].mo->y) | ||
267 | sep = NORM_SEP; | ||
268 | |||
269 | // hacks to vary the sfx pitches | ||
270 | if (sfx_id >= sfx_sawup && sfx_id <= sfx_sawhit) | ||
271 | pitch += 8 - (M_Random()&15); | ||
272 | else | ||
273 | if (sfx_id != sfx_itemup && sfx_id != sfx_tink) | ||
274 | pitch += 16 - (M_Random()&31); | ||
275 | |||
276 | if (pitch<0) | ||
277 | pitch = 0; | ||
278 | |||
279 | if (pitch>255) | ||
280 | pitch = 255; | ||
281 | |||
282 | // kill old sound | ||
283 | for (cnum=0 ; cnum<numChannels ; cnum++) | ||
284 | if (channels[cnum].sfxinfo && channels[cnum].origin == origin && | ||
285 | (comp[comp_sound] || channels[cnum].is_pickup == is_pickup)) | ||
286 | { | ||
287 | S_StopChannel(cnum); | ||
288 | break; | ||
289 | } | ||
290 | |||
291 | // try to find a channel | ||
292 | cnum = S_getChannel(origin, sfx, is_pickup); | ||
293 | |||
294 | if (cnum<0) | ||
295 | return; | ||
296 | |||
297 | // get lumpnum if necessary | ||
298 | // killough 2/28/98: make missing sounds non-fatal | ||
299 | if (sfx->lumpnum < 0 && (sfx->lumpnum = I_GetSfxLumpNum(sfx)) < 0) | ||
300 | return; | ||
301 | |||
302 | // increase the usefulness | ||
303 | if (sfx->usefulness++ < 0) | ||
304 | sfx->usefulness = 1; | ||
305 | |||
306 | // Assigns the handle to one of the channels in the mix/output buffer. | ||
307 | { // e6y: [Fix] Crash with zero-length sounds. | ||
308 | int h = I_StartSound(sfx_id, cnum, volume, sep, pitch, priority); | ||
309 | if (h != -1) channels[cnum].handle = h; | ||
310 | } | ||
311 | } | ||
312 | |||
313 | void S_StartSound(void *origin, int sfx_id) | ||
314 | { | ||
315 | S_StartSoundAtVolume(origin, sfx_id, snd_SfxVolume); | ||
316 | } | ||
317 | |||
318 | void S_StopSound(void *origin) | ||
319 | { | ||
320 | int cnum; | ||
321 | |||
322 | //jff 1/22/98 return if sound is not enabled | ||
323 | if (!snd_card || nosfxparm) | ||
324 | return; | ||
325 | |||
326 | for (cnum=0 ; cnum<numChannels ; cnum++) | ||
327 | if (channels[cnum].sfxinfo && channels[cnum].origin == origin) | ||
328 | { | ||
329 | S_StopChannel(cnum); | ||
330 | break; | ||
331 | } | ||
332 | } | ||
333 | |||
334 | |||
335 | // | ||
336 | // Stop and resume music, during game PAUSE. | ||
337 | // | ||
338 | void S_PauseSound(void) | ||
339 | { | ||
340 | //jff 1/22/98 return if music is not enabled | ||
341 | if (!mus_card || nomusicparm) | ||
342 | return; | ||
343 | |||
344 | if (mus_playing && !mus_paused) | ||
345 | { | ||
346 | I_PauseSong(mus_playing->handle); | ||
347 | mus_paused = true; | ||
348 | } | ||
349 | } | ||
350 | |||
351 | void S_ResumeSound(void) | ||
352 | { | ||
353 | //jff 1/22/98 return if music is not enabled | ||
354 | if (!mus_card || nomusicparm) | ||
355 | return; | ||
356 | |||
357 | if (mus_playing && mus_paused) | ||
358 | { | ||
359 | I_ResumeSong(mus_playing->handle); | ||
360 | mus_paused = false; | ||
361 | } | ||
362 | } | ||
363 | |||
364 | |||
365 | // | ||
366 | // Updates music & sounds | ||
367 | // | ||
368 | void S_UpdateSounds(void* listener_p) | ||
369 | { | ||
370 | mobj_t *listener = (mobj_t*) listener_p; | ||
371 | int cnum; | ||
372 | |||
373 | //jff 1/22/98 return if sound is not enabled | ||
374 | if (!snd_card || nosfxparm) | ||
375 | return; | ||
376 | |||
377 | #ifdef UPDATE_MUSIC | ||
378 | I_UpdateMusic(); | ||
379 | #endif | ||
380 | |||
381 | for (cnum=0 ; cnum<numChannels ; cnum++) | ||
382 | { | ||
383 | sfxinfo_t *sfx; | ||
384 | channel_t *c = &channels[cnum]; | ||
385 | if ((sfx = c->sfxinfo)) | ||
386 | { | ||
387 | if (I_SoundIsPlaying(c->handle)) | ||
388 | { | ||
389 | // initialize parameters | ||
390 | int volume = snd_SfxVolume; | ||
391 | int pitch = NORM_PITCH; | ||
392 | int sep = NORM_SEP; | ||
393 | |||
394 | if (sfx->link) | ||
395 | { | ||
396 | pitch = sfx->pitch; | ||
397 | volume += sfx->volume; | ||
398 | if (volume < 1) | ||
399 | { | ||
400 | S_StopChannel(cnum); | ||
401 | continue; | ||
402 | } | ||
403 | else | ||
404 | if (volume > snd_SfxVolume) | ||
405 | volume = snd_SfxVolume; | ||
406 | } | ||
407 | |||
408 | // check non-local sounds for distance clipping | ||
409 | // or modify their params | ||
410 | if (c->origin && listener_p != c->origin) { // killough 3/20/98 | ||
411 | if (!S_AdjustSoundParams(listener, c->origin, | ||
412 | &volume, &sep, &pitch)) | ||
413 | S_StopChannel(cnum); | ||
414 | else | ||
415 | I_UpdateSoundParams(c->handle, volume, sep, pitch); | ||
416 | } | ||
417 | } | ||
418 | else // if channel is allocated but sound has stopped, free it | ||
419 | S_StopChannel(cnum); | ||
420 | } | ||
421 | } | ||
422 | } | ||
423 | |||
424 | |||
425 | |||
426 | void S_SetMusicVolume(int volume) | ||
427 | { | ||
428 | //jff 1/22/98 return if music is not enabled | ||
429 | if (!mus_card || nomusicparm) | ||
430 | return; | ||
431 | if (volume < 0 || volume > 15) | ||
432 | I_Error("S_SetMusicVolume: Attempt to set music volume at %d", volume); | ||
433 | I_SetMusicVolume(volume); | ||
434 | snd_MusicVolume = volume; | ||
435 | } | ||
436 | |||
437 | |||
438 | |||
439 | void S_SetSfxVolume(int volume) | ||
440 | { | ||
441 | //jff 1/22/98 return if sound is not enabled | ||
442 | if (!snd_card || nosfxparm) | ||
443 | return; | ||
444 | if (volume < 0 || volume > 127) | ||
445 | I_Error("S_SetSfxVolume: Attempt to set sfx volume at %d", volume); | ||
446 | snd_SfxVolume = volume; | ||
447 | } | ||
448 | |||
449 | |||
450 | |||
451 | // Starts some music with the music id found in sounds.h. | ||
452 | // | ||
453 | void S_StartMusic(int m_id) | ||
454 | { | ||
455 | //jff 1/22/98 return if music is not enabled | ||
456 | if (!mus_card || nomusicparm) | ||
457 | return; | ||
458 | S_ChangeMusic(m_id, false); | ||
459 | } | ||
460 | |||
461 | |||
462 | |||
463 | void S_ChangeMusic(int musicnum, int looping) | ||
464 | { | ||
465 | musicinfo_t *music; | ||
466 | int music_file_failed; // cournia - if true load the default MIDI music | ||
467 | char* music_filename; // cournia | ||
468 | |||
469 | //jff 1/22/98 return if music is not enabled | ||
470 | if (!mus_card || nomusicparm) | ||
471 | return; | ||
472 | |||
473 | if (musicnum <= mus_None || musicnum >= NUMMUSIC) | ||
474 | I_Error("S_ChangeMusic: Bad music number %d", musicnum); | ||
475 | |||
476 | music = &S_music[musicnum]; | ||
477 | |||
478 | if (mus_playing == music) | ||
479 | return; | ||
480 | |||
481 | // shutdown old music | ||
482 | S_StopMusic(); | ||
483 | |||
484 | // get lumpnum if neccessary | ||
485 | if (!music->lumpnum) | ||
486 | { | ||
487 | char namebuf[9]; | ||
488 | sprintf(namebuf, "d_%s", music->name); | ||
489 | music->lumpnum = W_GetNumForName(namebuf); | ||
490 | } | ||
491 | |||
492 | music_file_failed = 1; | ||
493 | |||
494 | // proff_fs - only load when from IWAD | ||
495 | if (lumpinfo[music->lumpnum].source == source_iwad) | ||
496 | { | ||
497 | // cournia - check to see if we can play a higher quality music file | ||
498 | // rather than the default MIDI | ||
499 | music_filename = I_FindFile(S_music_files[musicnum], ""); | ||
500 | if (music_filename) | ||
501 | { | ||
502 | music_file_failed = I_RegisterMusic(music_filename, music); | ||
503 | free(music_filename); | ||
504 | } | ||
505 | } | ||
506 | |||
507 | if (music_file_failed) | ||
508 | { | ||
509 | //cournia - could not load music file, play default MIDI music | ||
510 | |||
511 | // load & register it | ||
512 | music->data = W_CacheLumpNum(music->lumpnum); | ||
513 | music->handle = I_RegisterSong(music->data, W_LumpLength(music->lumpnum)); | ||
514 | } | ||
515 | |||
516 | // play it | ||
517 | I_PlaySong(music->handle, looping); | ||
518 | |||
519 | mus_playing = music; | ||
520 | } | ||
521 | |||
522 | |||
523 | void S_StopMusic(void) | ||
524 | { | ||
525 | //jff 1/22/98 return if music is not enabled | ||
526 | if (!mus_card || nomusicparm) | ||
527 | return; | ||
528 | |||
529 | if (mus_playing) | ||
530 | { | ||
531 | if (mus_paused) | ||
532 | I_ResumeSong(mus_playing->handle); | ||
533 | |||
534 | I_StopSong(mus_playing->handle); | ||
535 | I_UnRegisterSong(mus_playing->handle); | ||
536 | if (mus_playing->lumpnum >= 0) | ||
537 | W_UnlockLumpNum(mus_playing->lumpnum); // cph - release the music data | ||
538 | |||
539 | mus_playing->data = 0; | ||
540 | mus_playing = 0; | ||
541 | } | ||
542 | } | ||
543 | |||
544 | |||
545 | |||
546 | void S_StopChannel(int cnum) | ||
547 | { | ||
548 | int i; | ||
549 | channel_t *c = &channels[cnum]; | ||
550 | |||
551 | //jff 1/22/98 return if sound is not enabled | ||
552 | if (!snd_card || nosfxparm) | ||
553 | return; | ||
554 | |||
555 | if (c->sfxinfo) | ||
556 | { | ||
557 | // stop the sound playing | ||
558 | if (I_SoundIsPlaying(c->handle)) | ||
559 | I_StopSound(c->handle); | ||
560 | |||
561 | // check to see | ||
562 | // if other channels are playing the sound | ||
563 | for (i=0 ; i<numChannels ; i++) | ||
564 | if (cnum != i && c->sfxinfo == channels[i].sfxinfo) | ||
565 | break; | ||
566 | |||
567 | // degrade usefulness of sound data | ||
568 | c->sfxinfo->usefulness--; | ||
569 | c->sfxinfo = 0; | ||
570 | } | ||
571 | } | ||
572 | |||
573 | // | ||
574 | // Changes volume, stereo-separation, and pitch variables | ||
575 | // from the norm of a sound effect to be played. | ||
576 | // If the sound is not audible, returns a 0. | ||
577 | // Otherwise, modifies parameters and returns 1. | ||
578 | // | ||
579 | |||
580 | int S_AdjustSoundParams(mobj_t *listener, mobj_t *source, | ||
581 | int *vol, int *sep, int *pitch) | ||
582 | { | ||
583 | fixed_t adx, ady,approx_dist; | ||
584 | angle_t angle; | ||
585 | |||
586 | //jff 1/22/98 return if sound is not enabled | ||
587 | if (!snd_card || nosfxparm) | ||
588 | return 0; | ||
589 | |||
590 | // e6y | ||
591 | // Fix crash when the program wants to S_AdjustSoundParams() for player | ||
592 | // which is not displayplayer and displayplayer was not spawned at the moment. | ||
593 | // It happens in multiplayer demos only. | ||
594 | // | ||
595 | // Stack trace is: | ||
596 | // P_SetupLevel() \ P_LoadThings() \ P_SpawnMapThing() \ P_SpawnPlayer(players[0]) \ | ||
597 | // P_SetupPsprites() \ P_BringUpWeapon() \ S_StartSound(players[0]->mo, sfx_sawup) \ | ||
598 | // S_StartSoundAtVolume() \ S_AdjustSoundParams(players[displayplayer]->mo, ...); | ||
599 | // players[displayplayer]->mo is NULL | ||
600 | // | ||
601 | // There is no more crash on e1cmnet3.lmp between e1m2 and e1m3 | ||
602 | // http://competn.doom2.net/pub/compet-n/doom/coop/movies/e1cmnet3.zip | ||
603 | if (!listener) | ||
604 | return 0; | ||
605 | |||
606 | // calculate the distance to sound origin | ||
607 | // and clip it if necessary | ||
608 | adx = D_abs(listener->x - source->x); | ||
609 | ady = D_abs(listener->y - source->y); | ||
610 | |||
611 | // From _GG1_ p.428. Appox. eucledian distance fast. | ||
612 | approx_dist = adx + ady - ((adx < ady ? adx : ady)>>1); | ||
613 | |||
614 | if (!approx_dist) // killough 11/98: handle zero-distance as special case | ||
615 | { | ||
616 | *sep = NORM_SEP; | ||
617 | *vol = snd_SfxVolume; | ||
618 | return *vol > 0; | ||
619 | } | ||
620 | |||
621 | if (approx_dist > S_CLIPPING_DIST) | ||
622 | return 0; | ||
623 | |||
624 | // angle of source to listener | ||
625 | angle = R_PointToAngle2(listener->x, listener->y, source->x, source->y); | ||
626 | |||
627 | if (angle <= listener->angle) | ||
628 | angle += 0xffffffff; | ||
629 | angle -= listener->angle; | ||
630 | angle >>= ANGLETOFINESHIFT; | ||
631 | |||
632 | // stereo separation | ||
633 | *sep = 128 - (FixedMul(S_STEREO_SWING,finesine[angle])>>FRACBITS); | ||
634 | |||
635 | // volume calculation | ||
636 | if (approx_dist < S_CLOSE_DIST) | ||
637 | *vol = snd_SfxVolume*8; | ||
638 | else | ||
639 | // distance effect | ||
640 | *vol = (snd_SfxVolume * ((S_CLIPPING_DIST-approx_dist)>>FRACBITS) * 8) | ||
641 | / S_ATTENUATOR; | ||
642 | |||
643 | return (*vol > 0); | ||
644 | } | ||
645 | |||
646 | // | ||
647 | // S_getChannel : | ||
648 | // If none available, return -1. Otherwise channel #. | ||
649 | // | ||
650 | // killough 4/25/98: made static, added is_pickup argument | ||
651 | |||
652 | static int S_getChannel(void *origin, sfxinfo_t *sfxinfo, int is_pickup) | ||
653 | { | ||
654 | // channel number to use | ||
655 | int cnum; | ||
656 | channel_t *c; | ||
657 | |||
658 | //jff 1/22/98 return if sound is not enabled | ||
659 | if (!snd_card || nosfxparm) | ||
660 | return -1; | ||
661 | |||
662 | // Find an open channel | ||
663 | for (cnum=0; cnum<numChannels && channels[cnum].sfxinfo; cnum++) | ||
664 | if (origin && channels[cnum].origin == origin && | ||
665 | channels[cnum].is_pickup == is_pickup) | ||
666 | { | ||
667 | S_StopChannel(cnum); | ||
668 | break; | ||
669 | } | ||
670 | |||
671 | // None available | ||
672 | if (cnum == numChannels) | ||
673 | { // Look for lower priority | ||
674 | for (cnum=0 ; cnum<numChannels ; cnum++) | ||
675 | if (channels[cnum].sfxinfo->priority >= sfxinfo->priority) | ||
676 | break; | ||
677 | if (cnum == numChannels) | ||
678 | return -1; // No lower priority. Sorry, Charlie. | ||
679 | else | ||
680 | S_StopChannel(cnum); // Otherwise, kick out lower priority. | ||
681 | } | ||
682 | |||
683 | c = &channels[cnum]; // channel is decided to be cnum. | ||
684 | c->sfxinfo = sfxinfo; | ||
685 | c->origin = origin; | ||
686 | c->is_pickup = is_pickup; // killough 4/25/98 | ||
687 | return cnum; | ||
688 | } | ||