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 vec_t sound_nominal_clip_dist=1000.0;
 150 mempool_t *snd_mempool;
 151
 152 // Linked list of known sfx
 153 static sfx_t *known_sfx = NULL;
 154
 155 static qboolean sound_spatialized = false;
 156
 157 qboolean simsound = false;
 158
 159 static qboolean recording_sound = false;
 160
 161 int snd_blocked = 0;
 162 static int current_swapstereo = false;
 163 static int current_channellayout = SND_CHANNELLAYOUT_AUTO;
 164 static int current_channellayout_used = SND_CHANNELLAYOUT_AUTO;
 165
 166 // Cvars declared in sound.h (part of the sound API)
 167 cvar_t bgmvolume = {CVAR_SAVE, "bgmvolume", "1", "volume of background music (such as CD music or replacement files such as sound/cdtracks/track002.ogg)"};
 168 cvar_t volume = {CVAR_SAVE, "volume", "0.7", "volume of sound effects"};
 169 cvar_t snd_initialized = { CVAR_READONLY, "snd_initialized", "0", "indicates the sound subsystem is active"};
 170 cvar_t snd_staticvolume = {CVAR_SAVE, "snd_staticvolume", "1", "volume of ambient sound effects (such as swampy sounds at the start of e1m2)"};
 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 static qboolean S_ChooseCheaperFormat (snd_format_t* format, qboolean fixed_speed, qboolean fixed_width, qboolean fixed_channels)
 305 {
 306         static const snd_format_t thresholds [] =
 307         {
 308                 // speed                        width                   channels
 309                 { SND_MIN_SPEED,        SND_MIN_WIDTH,  SND_MIN_CHANNELS },
 310                 { 11025,                        1,                              2 },
 311                 { 22050,                        2,                              2 },
 312                 { 44100,                        2,                              2 },
 313                 { 48000,                        2,                              6 },
 314                 { SND_MAX_SPEED,        SND_MAX_WIDTH,  SND_MAX_CHANNELS },
 315         };
 316         const unsigned int nb_thresholds = sizeof(thresholds) / sizeof(thresholds[0]);
 317         unsigned int speed_level, width_level, channels_level;
 318
 319         // If we have reached the minimum values, there's nothing more we can do
 320         if ((format->speed == thresholds[0].speed || fixed_speed) &&
 321                 (format->width == thresholds[0].width || fixed_width) &&
 322                 (format->channels == thresholds[0].channels || fixed_channels))
 323                 return false;
 324
 325         // Check the min and max values
 326         #define CHECK_BOUNDARIES(param)                                                         \
 327         if (format->param < thresholds[0].param)                                        \
 328         {                                                                                                                       \
 329                 format->param = thresholds[0].param;                                    \
 330                 return true;                                                                                    \
 331         }                                                                                                                       \
 332         if (format->param > thresholds[nb_thresholds - 1].param)        \
 333         {                                                                                                                       \
 334                 format->param = thresholds[nb_thresholds - 1].param;    \
 335                 return true;                                                                                    \
 336         }
 337         CHECK_BOUNDARIES(speed);
 338         CHECK_BOUNDARIES(width);
 339         CHECK_BOUNDARIES(channels);
 340         #undef CHECK_BOUNDARIES
 341
 342         // Find the level of each parameter
 343         #define FIND_LEVEL(param)                                                                       \
 344         param##_level = 0;                                                                                      \
 345         while (param##_level < nb_thresholds - 1)                                       \
 346         {                                                                                                                       \
 347                 if (format->param <= thresholds[param##_level].param)   \
 348                         break;                                                                                          \
 349                                                                                                                                 \
 350                 param##_level++;                                                                                \
 351         }
 352         FIND_LEVEL(speed);
 353         FIND_LEVEL(width);
 354         FIND_LEVEL(channels);
 355         #undef FIND_LEVEL
 356
 357         // Decrease the parameter with the highest level to the previous level
 358         if (channels_level >= speed_level && channels_level >= width_level && !fixed_channels)
 359         {
 360                 format->channels = thresholds[channels_level - 1].channels;
 361                 return true;
 362         }
 363         if (speed_level >= width_level && !fixed_speed)
 364         {
 365                 format->speed = thresholds[speed_level - 1].speed;
 366                 return true;
 367         }
 368
 369         format->width = thresholds[width_level - 1].width;
 370         return true;
 371 }
 372
 373
 374 #define SWAP_LISTENERS(l1, l2, tmpl) { tmpl = (l1); (l1) = (l2); (l2) = tmpl; }
 375
 376 static void S_SetChannelLayout (void)
 377 {
 378         unsigned int i;
 379         listener_t swaplistener;
 380         listener_t *listeners;
 381         int layout;
 382
 383         for (i = 0; i < SND_SPEAKERLAYOUTS; i++)
 384                 if (snd_speakerlayouts[i].channels == snd_renderbuffer->format.channels)
 385                         break;
 386         if (i >= SND_SPEAKERLAYOUTS)
 387         {
 388                 Con_Printf("S_SetChannelLayout: can't find the speaker layout for %hu channels. Defaulting to mono output\n",
 389                                    snd_renderbuffer->format.channels);
 390                 i = SND_SPEAKERLAYOUTS - 1;
 391         }
 392
 393         snd_speakerlayout = snd_speakerlayouts[i];
 394         listeners = snd_speakerlayout.listeners;
 395
 396         // Swap the left and right channels if snd_swapstereo is set
 397         if (snd_swapstereo.integer)
 398         {
 399                 switch (snd_speakerlayout.channels)
 400                 {
 401                         case 8:
 402                                 SWAP_LISTENERS(listeners[6], listeners[7], swaplistener);
 403                                 // no break
 404                         case 4:
 405                         case 6:
 406                                 SWAP_LISTENERS(listeners[2], listeners[3], swaplistener);
 407                                 // no break
 408                         case 2:
 409                                 SWAP_LISTENERS(listeners[0], listeners[1], swaplistener);
 410                                 break;
 411
 412                         default:
 413                         case 1:
 414                                 // Nothing to do
 415                                 break;
 416                 }
 417         }
 418
 419         // Sanity check
 420         if (snd_channellayout.integer < SND_CHANNELLAYOUT_AUTO ||
 421                 snd_channellayout.integer > SND_CHANNELLAYOUT_ALSA)
 422                 Cvar_SetValueQuick (&snd_channellayout, SND_CHANNELLAYOUT_STANDARD);
 423
 424         if (snd_channellayout.integer == SND_CHANNELLAYOUT_AUTO)
 425         {
 426                 // If we're in the sound engine initialization
 427                 if (current_channellayout_used == SND_CHANNELLAYOUT_AUTO)
 428                 {
 429                         layout = SND_CHANNELLAYOUT_STANDARD;
 430                         Cvar_SetValueQuick (&snd_channellayout, layout);
 431                 }
 432                 else
 433                         layout = current_channellayout_used;
 434         }
 435         else
 436                 layout = snd_channellayout.integer;
 437
 438         // Convert our layout (= ALSA) to the standard layout if necessary
 439         if (snd_speakerlayout.channels == 6 || snd_speakerlayout.channels == 8)
 440         {
 441                 if (layout == SND_CHANNELLAYOUT_STANDARD)
 442                 {
 443                         SWAP_LISTENERS(listeners[2], listeners[4], swaplistener);
 444                         SWAP_LISTENERS(listeners[3], listeners[5], swaplistener);
 445                 }
 446
 447                 Con_Printf("S_SetChannelLayout: using %s speaker layout for 3D sound\n",
 448                                    (layout == SND_CHANNELLAYOUT_ALSA) ? "ALSA" : "standard");
 449         }
 450
 451         current_swapstereo = snd_swapstereo.integer;
 452         current_channellayout = snd_channellayout.integer;
 453         current_channellayout_used = layout;
 454 }
 455
 456
 457 void S_Startup (void)
 458 {
 459         qboolean fixed_speed, fixed_width, fixed_channels;
 460         snd_format_t chosen_fmt;
 461         static snd_format_t prev_render_format = {0, 0, 0};
 462         const char* env;
 463         int i;
 464
 465         if (!snd_initialized.integer)
 466                 return;
 467
 468         fixed_speed = false;
 469         fixed_width = false;
 470         fixed_channels = false;
 471
 472         // Get the starting sound format from the cvars
 473         chosen_fmt.speed = snd_speed.integer;
 474         chosen_fmt.width = snd_width.integer;
 475         chosen_fmt.channels = snd_channels.integer;
 476
 477         // Check the environment variables to see if the player wants a particular sound format
 478         env = getenv("QUAKE_SOUND_CHANNELS");
 479         if (env != NULL)
 480         {
 481                 chosen_fmt.channels = atoi (env);
 482                 fixed_channels = true;
 483         }
 484         env = getenv("QUAKE_SOUND_SPEED");
 485         if (env != NULL)
 486         {
 487                 chosen_fmt.speed = atoi (env);
 488                 fixed_speed = true;
 489         }
 490         env = getenv("QUAKE_SOUND_SAMPLEBITS");
 491         if (env != NULL)
 492         {
 493                 chosen_fmt.width = atoi (env) / 8;
 494                 fixed_width = true;
 495         }
 496
 497         // Parse the command line to see if the player wants a particular sound format
 498 // COMMANDLINEOPTION: Sound: -sndquad sets sound output to 4 channel surround
 499         if (COM_CheckParm ("-sndquad") != 0)
 500         {
 501                 chosen_fmt.channels = 4;
 502                 fixed_channels = true;
 503         }
 504 // COMMANDLINEOPTION: Sound: -sndstereo sets sound output to stereo
 505         else if (COM_CheckParm ("-sndstereo") != 0)
 506         {
 507                 chosen_fmt.channels = 2;
 508                 fixed_channels = true;
 509         }
 510 // COMMANDLINEOPTION: Sound: -sndmono sets sound output to mono
 511         else if (COM_CheckParm ("-sndmono") != 0)
 512         {
 513                 chosen_fmt.channels = 1;
 514                 fixed_channels = true;
 515         }
 516 // COMMANDLINEOPTION: Sound: -sndspeed <hz> chooses sound output rate (supported values are 48000, 44100, 32000, 24000, 22050, 16000, 11025 (quake), 8000)
 517         i = COM_CheckParm ("-sndspeed");
 518         if (0 < i && i < com_argc - 1)
 519         {
 520                 chosen_fmt.speed = atoi (com_argv[i + 1]);
 521                 fixed_speed = true;
 522         }
 523 // COMMANDLINEOPTION: Sound: -sndbits <bits> chooses 8 bit or 16 bit sound output
 524         i = COM_CheckParm ("-sndbits");
 525         if (0 < i && i < com_argc - 1)
 526         {
 527                 chosen_fmt.width = atoi (com_argv[i + 1]) / 8;
 528                 fixed_width = true;
 529         }
 530
 531         // You can't change sound speed after start time (not yet supported)
 532         if (prev_render_format.speed != 0)
 533         {
 534                 fixed_speed = true;
 535                 if (chosen_fmt.speed != prev_render_format.speed)
 536                 {
 537                         Con_Printf("S_Startup: sound speed has changed! This is NOT supported yet. Falling back to previous speed (%u Hz)\n",
 538                                            prev_render_format.speed);
 539                         chosen_fmt.speed = prev_render_format.speed;
 540                 }
 541         }
 542
 543         // Sanity checks
 544         if (chosen_fmt.speed < SND_MIN_SPEED)
 545         {
 546                 chosen_fmt.speed = SND_MIN_SPEED;
 547                 fixed_speed = false;
 548         }
 549         else if (chosen_fmt.speed > SND_MAX_SPEED)
 550         {
 551                 chosen_fmt.speed = SND_MAX_SPEED;
 552                 fixed_speed = false;
 553         }
 554
 555         if (chosen_fmt.width < SND_MIN_WIDTH)
 556         {
 557                 chosen_fmt.width = SND_MIN_WIDTH;
 558                 fixed_width = false;
 559         }
 560         else if (chosen_fmt.width > SND_MAX_WIDTH)
 561         {
 562                 chosen_fmt.width = SND_MAX_WIDTH;
 563                 fixed_width = false;
 564         }
 565
 566         if (chosen_fmt.channels < SND_MIN_CHANNELS)
 567         {
 568                 chosen_fmt.channels = SND_MIN_CHANNELS;
 569                 fixed_channels = false;
 570         }
 571         else if (chosen_fmt.channels > SND_MAX_CHANNELS)
 572         {
 573                 chosen_fmt.channels = SND_MAX_CHANNELS;
 574                 fixed_channels = false;
 575         }
 576
 577         // create the sound buffer used for sumitting the samples to the plaform-dependent module
 578         if (!simsound)
 579         {
 580                 snd_format_t suggest_fmt;
 581                 qboolean accepted;
 582
 583                 accepted = false;
 584                 do
 585                 {
 586                         Con_DPrintf("S_Startup: initializing sound output format: %dHz, %d bit, %d channels...\n",
 587                                                 chosen_fmt.speed, chosen_fmt.width * 8,
 588                                                 chosen_fmt.channels);
 589
 590                         memset(&suggest_fmt, 0, sizeof(suggest_fmt));
 591                         accepted = SndSys_Init(&chosen_fmt, &suggest_fmt);
 592
 593                         if (!accepted)
 594                         {
 595                                 Con_DPrintf("S_Startup: sound output initialization FAILED\n");
 596
 597                                 // If the module is suggesting another one
 598                                 if (suggest_fmt.speed != 0)
 599                                 {
 600                                         memcpy(&chosen_fmt, &suggest_fmt, sizeof(chosen_fmt));
 601                                         Con_Printf ("           Driver has suggested %dHz, %d bit, %d channels. Retrying...\n",
 602                                                                 suggest_fmt.speed, suggest_fmt.width * 8,
 603                                                                 suggest_fmt.channels);
 604                                 }
 605                                 // Else, try to find a less resource-demanding format
 606                                 else if (!S_ChooseCheaperFormat (&chosen_fmt, fixed_speed, fixed_width, fixed_channels))
 607                                         break;
 608                         }
 609                 } while (!accepted);
 610
 611                 // If we haven't found a suitable format
 612                 if (!accepted)
 613                 {
 614                         Con_Print("S_Startup: SndSys_Init failed.\n");
 615                         sound_spatialized = false;
 616                         return;
 617                 }
 618         }
 619         else
 620         {
 621                 snd_renderbuffer = Snd_CreateRingBuffer(&chosen_fmt, 0, NULL);
 622                 Con_Print ("S_Startup: simulating sound output\n");
 623         }
 624
 625         memcpy(&prev_render_format, &snd_renderbuffer->format, sizeof(prev_render_format));
 626         Con_Printf("Sound format: %dHz, %d channels, %d bits per sample\n",
 627                            chosen_fmt.speed, chosen_fmt.channels, chosen_fmt.width * 8);
 628
 629         // Update the cvars
 630         if (snd_speed.integer != (int)chosen_fmt.speed)
 631                 Cvar_SetValueQuick(&snd_speed, chosen_fmt.speed);
 632         if (snd_width.integer != chosen_fmt.width)
 633                 Cvar_SetValueQuick(&snd_width, chosen_fmt.width);
 634         if (snd_channels.integer != chosen_fmt.channels)
 635                 Cvar_SetValueQuick(&snd_channels, chosen_fmt.channels);
 636
 637         current_channellayout_used = SND_CHANNELLAYOUT_AUTO;
 638         S_SetChannelLayout();
 639
 640         snd_starttime = realtime;
 641
 642         // If the sound module has already run, add an extra time to make sure
 643         // the sound time doesn't decrease, to not confuse playing SFXs
 644         if (oldpaintedtime != 0)
 645         {
 646                 // The extra time must be a multiple of the render buffer size
 647                 // to avoid modifying the current position in the buffer,
 648                 // some modules write directly to a shared (DMA) buffer
 649                 extrasoundtime = oldpaintedtime + snd_renderbuffer->maxframes - 1;
 650                 extrasoundtime -= extrasoundtime % snd_renderbuffer->maxframes;
 651                 Con_DPrintf("S_Startup: extra sound time = %u\n", extrasoundtime);
 652
 653                 soundtime = extrasoundtime;
 654         }
 655         else
 656                 extrasoundtime = 0;
 657         snd_renderbuffer->startframe = soundtime;
 658         snd_renderbuffer->endframe = soundtime;
 659         recording_sound = false;
 660 }
 661
 662 void S_Shutdown(void)
 663 {
 664         if (snd_renderbuffer == NULL)
 665                 return;
 666
 667         oldpaintedtime = snd_renderbuffer->endframe;
 668
 669         if (simsound)
 670         {
 671                 Mem_Free(snd_renderbuffer->ring);
 672                 Mem_Free(snd_renderbuffer);
 673                 snd_renderbuffer = NULL;
 674         }
 675         else
 676                 SndSys_Shutdown();
 677
 678         sound_spatialized = false;
 679 }
 680
 681 void S_Restart_f(void)
 682 {
 683         S_Shutdown();
 684         S_Startup();
 685 }
 686
 687 /*
 688 ================
 689 S_Init
 690 ================
 691 */
 692 void S_Init(void)
 693 {
 694         Con_DPrint("\nSound Initialization\n");
 695
 696         Cvar_RegisterVariable(&volume);
 697         Cvar_RegisterVariable(&bgmvolume);
 698         Cvar_RegisterVariable(&snd_staticvolume);
 699
 700         Cvar_RegisterVariable(&snd_speed);
 701         Cvar_RegisterVariable(&snd_width);
 702         Cvar_RegisterVariable(&snd_channels);
 703
 704 // COMMANDLINEOPTION: Sound: -nosound disables sound (including CD audio)
 705         if (COM_CheckParm("-nosound") || COM_CheckParm("-safe"))
 706                 return;
 707
 708         snd_mempool = Mem_AllocPool("sound", 0, NULL);
 709
 710 // COMMANDLINEOPTION: Sound: -simsound runs sound mixing but with no output
 711         if (COM_CheckParm("-simsound"))
 712                 simsound = true;
 713
 714         Cmd_AddCommand("play", S_Play_f, "play a sound at your current location (not heard by anyone else)");
 715         Cmd_AddCommand("play2", S_Play2_f, "play a sound globally throughout the level (not heard by anyone else)");
 716         Cmd_AddCommand("playvol", S_PlayVol_f, "play a sound at the specified volume level at your current location (not heard by anyone else)");
 717         Cmd_AddCommand("stopsound", S_StopAllSounds, "silence");
 718         Cmd_AddCommand("soundlist", S_SoundList_f, "list loaded sounds");
 719         Cmd_AddCommand("soundinfo", S_SoundInfo_f, "print sound system information (such as channels and speed)");
 720         Cmd_AddCommand("snd_restart", S_Restart_f, "restart sound system");
 721
 722         Cvar_RegisterVariable(&nosound);
 723         Cvar_RegisterVariable(&snd_precache);
 724         Cvar_RegisterVariable(&snd_initialized);
 725         Cvar_RegisterVariable(&snd_streaming);
 726         Cvar_RegisterVariable(&ambient_level);
 727         Cvar_RegisterVariable(&ambient_fade);
 728         Cvar_RegisterVariable(&snd_noextraupdate);
 729         Cvar_RegisterVariable(&snd_show);
 730         Cvar_RegisterVariable(&_snd_mixahead);
 731         Cvar_RegisterVariable(&snd_swapstereo); // for people with backwards sound wiring
 732         Cvar_RegisterVariable(&snd_channellayout);
 733
 734         Cvar_SetValueQuick(&snd_initialized, true);
 735
 736         known_sfx = NULL;
 737
 738         total_channels = MAX_DYNAMIC_CHANNELS + NUM_AMBIENTS;   // no statics
 739         memset(channels, 0, MAX_CHANNELS * sizeof(channel_t));
 740
 741         OGG_OpenLibrary ();
 742 }
 743
 744
 745 /*
 746 ================
 747 S_Terminate
 748
 749 Shutdown and free all resources
 750 ================
 751 */
 752 void S_Terminate (void)
 753 {
 754         S_Shutdown ();
 755         OGG_CloseLibrary ();
 756
 757         // Free all SFXs
 758         while (known_sfx != NULL)
 759                 S_FreeSfx (known_sfx, true);
 760
 761         Cvar_SetValueQuick (&snd_initialized, false);
 762         Mem_FreePool (&snd_mempool);
 763 }
 764
 765
 766 /*
 767 ==================
 768 S_FindName
 769 ==================
 770 */
 771 sfx_t *S_FindName (const char *name)
 772 {
 773         sfx_t *sfx;
 774
 775         if (!snd_initialized.integer)
 776                 return NULL;
 777
 778         if (strlen (name) >= sizeof (sfx->name))
 779         {
 780                 Con_Printf ("S_FindName: sound name too long (%s)\n", name);
 781                 return NULL;
 782         }
 783
 784         // Look for this sound in the list of known sfx
 785         for (sfx = known_sfx; sfx != NULL; sfx = sfx->next)
 786                 if(!strcmp (sfx->name, name))
 787                         return sfx;
 788
 789         // Add a sfx_t struct for this sound
 790         sfx = (sfx_t *)Mem_Alloc (snd_mempool, sizeof (*sfx));
 791         memset (sfx, 0, sizeof(*sfx));
 792         strlcpy (sfx->name, name, sizeof (sfx->name));
 793         sfx->memsize = sizeof(*sfx);
 794         sfx->next = known_sfx;
 795         known_sfx = sfx;
 796
 797         return sfx;
 798 }
 799
 800
 801 /*
 802 ==================
 803 S_FreeSfx
 804 ==================
 805 */
 806 void S_FreeSfx (sfx_t *sfx, qboolean force)
 807 {
 808         unsigned int i;
 809
 810         // Never free a locked sfx unless forced
 811         if (!force && (sfx->locks > 0 || (sfx->flags & SFXFLAG_PERMANENTLOCK)))
 812                 return;
 813
 814         Con_DPrintf ("S_FreeSfx: freeing %s\n", sfx->name);
 815
 816         // Remove it from the list of known sfx
 817         if (sfx == known_sfx)
 818                 known_sfx = known_sfx->next;
 819         else
 820         {
 821                 sfx_t *prev_sfx;
 822
 823                 for (prev_sfx = known_sfx; prev_sfx != NULL; prev_sfx = prev_sfx->next)
 824                         if (prev_sfx->next == sfx)
 825                         {
 826                                 prev_sfx->next = sfx->next;
 827                                 break;
 828                         }
 829                 if (prev_sfx == NULL)
 830                 {
 831                         Con_Printf ("S_FreeSfx: Can't find SFX %s in the list!\n", sfx->name);
 832                         return;
 833                 }
 834         }
 835
 836         // Stop all channels using this sfx
 837         for (i = 0; i < total_channels; i++)
 838                 if (channels[i].sfx == sfx)
 839                         S_StopChannel (i);
 840
 841         // Free it
 842         if (sfx->fetcher != NULL && sfx->fetcher->free != NULL)
 843                 sfx->fetcher->free (sfx);
 844         Mem_Free (sfx);
 845 }
 846
 847
 848 /*
 849 ==================
 850 S_ServerSounds
 851 ==================
 852 */
 853 void S_ServerSounds (char serversound [][MAX_QPATH], unsigned int numsounds)
 854 {
 855         sfx_t *sfx;
 856         sfx_t *sfxnext;
 857         unsigned int i;
 858
 859         // Start the ambient sounds and make them loop
 860         for (i = 0; i < sizeof (ambient_sfxs) / sizeof (ambient_sfxs[0]); i++)
 861         {
 862                 // Precache it if it's not done (request a lock to make sure it will never be freed)
 863                 if (ambient_sfxs[i] == NULL)
 864                         ambient_sfxs[i] = S_PrecacheSound (ambient_names[i], false, true);
 865                 if (ambient_sfxs[i] != NULL)
 866                 {
 867                         // Add a lock to the SFX while playing. It will be
 868                         // removed by S_StopAllSounds at the end of the level
 869                         S_LockSfx (ambient_sfxs[i]);
 870
 871                         channels[i].sfx = ambient_sfxs[i];
 872                         channels[i].flags |= CHANNELFLAG_FORCELOOP;
 873                         channels[i].master_vol = 0;
 874                 }
 875         }
 876
 877         // Remove 1 lock from all sfx with the SFXFLAG_SERVERSOUND flag, and remove the flag
 878         for (sfx = known_sfx; sfx != NULL; sfx = sfx->next)
 879                 if (sfx->flags & SFXFLAG_SERVERSOUND)
 880                 {
 881                         S_UnlockSfx (sfx);
 882                         sfx->flags &= ~SFXFLAG_SERVERSOUND;
 883                 }
 884
 885         // Add 1 lock and the SFXFLAG_SERVERSOUND flag to each sfx in "serversound"
 886         for (i = 1; i < numsounds; i++)
 887         {
 888                 sfx = S_FindName (serversound[i]);
 889                 if (sfx != NULL)
 890                 {
 891                         S_LockSfx (sfx);
 892                         sfx->flags |= SFXFLAG_SERVERSOUND;
 893                 }
 894         }
 895
 896         // Free all unlocked sfx
 897         for (sfx = known_sfx;sfx;sfx = sfxnext)
 898         {
 899                 sfxnext = sfx->next;
 900                 S_FreeSfx (sfx, false);
 901         }
 902 }
 903
 904
 905 /*
 906 ==================
 907 S_PrecacheSound
 908 ==================
 909 */
 910 sfx_t *S_PrecacheSound (const char *name, qboolean complain, qboolean lock)
 911 {
 912         sfx_t *sfx;
 913
 914         if (!snd_initialized.integer)
 915                 return NULL;
 916
 917         if (name == NULL || name[0] == 0)
 918                 return NULL;
 919
 920         sfx = S_FindName (name);
 921         if (sfx == NULL)
 922                 return NULL;
 923
 924         if (lock)
 925                 S_LockSfx (sfx);
 926
 927         if (!nosound.integer && snd_precache.integer)
 928                 S_LoadSound(sfx, complain);
 929
 930         return sfx;
 931 }
 932
 933 /*
 934 ==================
 935 S_IsSoundPrecached
 936 ==================
 937 */
 938 qboolean S_IsSoundPrecached (const sfx_t *sfx)
 939 {
 940         return (sfx != NULL && sfx->fetcher != NULL);
 941 }
 942
 943 /*
 944 ==================
 945 S_LockSfx
 946
 947 Add a lock to a SFX
 948 ==================
 949 */
 950 void S_LockSfx (sfx_t *sfx)
 951 {
 952         sfx->locks++;
 953 }
 954
 955 /*
 956 ==================
 957 S_UnlockSfx
 958
 959 Remove a lock from a SFX
 960 ==================
 961 */
 962 void S_UnlockSfx (sfx_t *sfx)
 963 {
 964         sfx->locks--;
 965 }
 966
 967
 968 /*
 969 ==================
 970 S_BlockSound
 971 ==================
 972 */
 973 void S_BlockSound (void)
 974 {
 975         snd_blocked++;
 976 }
 977
 978
 979 /*
 980 ==================
 981 S_UnblockSound
 982 ==================
 983 */
 984 void S_UnblockSound (void)
 985 {
 986         snd_blocked--;
 987 }
 988
 989
 990 /*
 991 =================
 992 SND_PickChannel
 993
 994 Picks a channel based on priorities, empty slots, number of channels
 995 =================
 996 */
 997 channel_t *SND_PickChannel(int entnum, int entchannel)
 998 {
 999         int ch_idx;
1000         int first_to_die;
1001         int first_life_left, life_left;
1002         channel_t* ch;
1003
1004 // Check for replacement sound, or find the best one to replace
1005         first_to_die = -1;
1006         first_life_left = 0x7fffffff;
1007         for (ch_idx=NUM_AMBIENTS ; ch_idx < NUM_AMBIENTS + MAX_DYNAMIC_CHANNELS ; ch_idx++)
1008         {
1009                 ch = &channels[ch_idx];
1010                 if (entchannel != 0)
1011                 {
1012                         // try to override an existing channel
1013                         if (ch->entnum == entnum && (ch->entchannel == entchannel || entchannel == -1) )
1014                         {
1015                                 // always override sound from same entity
1016                                 first_to_die = ch_idx;
1017                                 break;
1018                         }
1019                 }
1020                 else
1021                 {
1022                         if (!ch->sfx)
1023                         {
1024                                 // no sound on this channel
1025                                 first_to_die = ch_idx;
1026                                 break;
1027                         }
1028                 }
1029
1030                 if (ch->sfx)
1031                 {
1032                         // don't let monster sounds override player sounds
1033                         if (ch->entnum == cl.viewentity && entnum != cl.viewentity)
1034                                 continue;
1035
1036                         // don't override looped sounds
1037                         if ((ch->flags & CHANNELFLAG_FORCELOOP) || ch->sfx->loopstart >= 0)
1038                                 continue;
1039                 }
1040
1041                 life_left = (int)(ch->end - snd_renderbuffer->endframe);
1042                 if (life_left < first_life_left)
1043                 {
1044                         first_life_left = life_left;
1045                         first_to_die = ch_idx;
1046                 }
1047         }
1048
1049         if (first_to_die == -1)
1050                 return NULL;
1051
1052         S_StopChannel (first_to_die);
1053
1054         return &channels[first_to_die];
1055 }
1056
1057 /*
1058 =================
1059 SND_Spatialize
1060
1061 Spatializes a channel
1062 =================
1063 */
1064 void SND_Spatialize(channel_t *ch, qboolean isstatic)
1065 {
1066         int i;
1067         vec_t dist, mastervol, intensity, vol;
1068         vec3_t source_vec;
1069
1070         // update sound origin if we know about the entity
1071         if (ch->entnum > 0 && cls.state == ca_connected && cl.entities[ch->entnum].state_current.active)
1072         {
1073                 //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]);
1074                 VectorCopy(cl.entities[ch->entnum].state_current.origin, ch->origin);
1075                 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)
1076                         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);
1077         }
1078
1079         mastervol = ch->master_vol;
1080         // Adjust volume of static sounds
1081         if (isstatic)
1082                 mastervol *= snd_staticvolume.value;
1083
1084         // anything coming from the view entity will always be full volume
1085         // LordHavoc: make sounds with ATTN_NONE have no spatialization
1086         if (ch->entnum == cl.viewentity || ch->dist_mult == 0)
1087         {
1088                 for (i = 0;i < SND_LISTENERS;i++)
1089                 {
1090                         vol = mastervol * snd_speakerlayout.listeners[i].ambientvolume;
1091                         ch->listener_volume[i] = (int)bound(0, vol, 255);
1092                 }
1093         }
1094         else
1095         {
1096                 // calculate stereo seperation and distance attenuation
1097                 VectorSubtract(listener_origin, ch->origin, source_vec);
1098                 dist = VectorLength(source_vec);
1099                 intensity = mastervol * (1.0 - dist * ch->dist_mult);
1100                 if (intensity > 0)
1101                 {
1102                         for (i = 0;i < SND_LISTENERS;i++)
1103                         {
1104                                 Matrix4x4_Transform(&listener_matrix[i], ch->origin, source_vec);
1105                                 VectorNormalize(source_vec);
1106                                 vol = intensity * max(0, source_vec[0] * snd_speakerlayout.listeners[i].dotscale + snd_speakerlayout.listeners[i].dotbias);
1107                                 ch->listener_volume[i] = (int)bound(0, vol, 255);
1108                         }
1109                 }
1110                 else
1111                         for (i = 0;i < SND_LISTENERS;i++)
1112                                 ch->listener_volume[i] = 0;
1113         }
1114 }
1115
1116
1117 // =======================================================================
1118 // Start a sound effect
1119 // =======================================================================
1120
1121 void S_PlaySfxOnChannel (sfx_t *sfx, channel_t *target_chan, unsigned int flags, vec3_t origin, float fvol, float attenuation, qboolean isstatic)
1122 {
1123         // Initialize the channel
1124         memset (target_chan, 0, sizeof (*target_chan));
1125         VectorCopy (origin, target_chan->origin);
1126         target_chan->master_vol = (int)(fvol * 255);
1127         target_chan->sfx = sfx;
1128         target_chan->end = snd_renderbuffer->endframe + sfx->total_length;
1129         target_chan->lastptime = snd_renderbuffer->endframe;
1130         target_chan->flags = flags;
1131
1132         // If it's a static sound
1133         if (isstatic)
1134         {
1135                 if (sfx->loopstart == -1)
1136                         Con_DPrintf("Quake compatibility warning: Static sound \"%s\" is not looped\n", sfx->name);
1137                 target_chan->dist_mult = attenuation / (64.0f * sound_nominal_clip_dist);
1138         }
1139         else
1140                 target_chan->dist_mult = attenuation / sound_nominal_clip_dist;
1141
1142         // Lock the SFX during play
1143         S_LockSfx (sfx);
1144 }
1145
1146
1147 int S_StartSound (int entnum, int entchannel, sfx_t *sfx, vec3_t origin, float fvol, float attenuation)
1148 {
1149         channel_t *target_chan, *check;
1150         int             ch_idx;
1151         int             skip;
1152
1153         if (snd_renderbuffer == NULL || sfx == NULL || nosound.integer)
1154                 return -1;
1155
1156         if (sfx->fetcher == NULL)
1157                 return -1;
1158
1159         if (entnum && entnum >= cl.max_entities)
1160                 CL_ExpandEntities(entnum);
1161
1162         // Pick a channel to play on
1163         target_chan = SND_PickChannel(entnum, entchannel);
1164         if (!target_chan)
1165                 return -1;
1166
1167         S_PlaySfxOnChannel (sfx, target_chan, CHANNELFLAG_NONE, origin, fvol, attenuation, false);
1168         target_chan->entnum = entnum;
1169         target_chan->entchannel = entchannel;
1170
1171         SND_Spatialize(target_chan, false);
1172
1173         // if an identical sound has also been started this frame, offset the pos
1174         // a bit to keep it from just making the first one louder
1175         check = &channels[NUM_AMBIENTS];
1176         for (ch_idx=NUM_AMBIENTS ; ch_idx < NUM_AMBIENTS + MAX_DYNAMIC_CHANNELS ; ch_idx++, check++)
1177         {
1178                 if (check == target_chan)
1179                         continue;
1180                 if (check->sfx == sfx && !check->pos)
1181                 {
1182                         skip = (int)(0.1 * snd_renderbuffer->format.speed);
1183                         if (skip > (int)sfx->total_length)
1184                                 skip = (int)sfx->total_length;
1185                         if (skip > 0)
1186                                 skip = rand() % skip;
1187                         target_chan->pos += skip;
1188                         target_chan->end -= skip;
1189                         break;
1190                 }
1191         }
1192
1193         return (target_chan - channels);
1194 }
1195
1196 void S_StopChannel (unsigned int channel_ind)
1197 {
1198         channel_t *ch;
1199
1200         if (channel_ind >= total_channels)
1201                 return;
1202
1203         ch = &channels[channel_ind];
1204         if (ch->sfx != NULL)
1205         {
1206                 sfx_t *sfx = ch->sfx;
1207
1208                 if (sfx->fetcher != NULL)
1209                 {
1210                         snd_fetcher_endsb_t fetcher_endsb = sfx->fetcher->endsb;
1211                         if (fetcher_endsb != NULL)
1212                                 fetcher_endsb (ch);
1213                 }
1214
1215                 // Remove the lock it holds
1216                 S_UnlockSfx (sfx);
1217
1218                 ch->sfx = NULL;
1219         }
1220         ch->end = 0;
1221 }
1222
1223
1224 qboolean S_SetChannelFlag (unsigned int ch_ind, unsigned int flag, qboolean value)
1225 {
1226         if (ch_ind >= total_channels)
1227                 return false;
1228
1229         if (flag != CHANNELFLAG_FORCELOOP &&
1230                 flag != CHANNELFLAG_PAUSED &&
1231                 flag != CHANNELFLAG_FULLVOLUME)
1232                 return false;
1233
1234         if (value)
1235                 channels[ch_ind].flags |= flag;
1236         else
1237                 channels[ch_ind].flags &= ~flag;
1238
1239         return true;
1240 }
1241
1242 void S_StopSound(int entnum, int entchannel)
1243 {
1244         unsigned int i;
1245
1246         for (i = 0; i < MAX_DYNAMIC_CHANNELS; i++)
1247                 if (channels[i].entnum == entnum && channels[i].entchannel == entchannel)
1248                 {
1249                         S_StopChannel (i);
1250                         return;
1251                 }
1252 }
1253
1254 void S_StopAllSounds (void)
1255 {
1256         unsigned int i;
1257
1258         // TOCHECK: is this test necessary?
1259         if (snd_renderbuffer == NULL)
1260                 return;
1261
1262         for (i = 0; i < total_channels; i++)
1263                 S_StopChannel (i);
1264
1265         total_channels = MAX_DYNAMIC_CHANNELS + NUM_AMBIENTS;   // no statics
1266         memset(channels, 0, MAX_CHANNELS * sizeof(channel_t));
1267
1268         // Mute the contents of the submittion buffer
1269         if (simsound || SndSys_LockRenderBuffer ())
1270         {
1271                 int clear;
1272                 size_t memsize;
1273
1274                 clear = (snd_renderbuffer->format.width == 1) ? 0x80 : 0;
1275                 memsize = snd_renderbuffer->maxframes * snd_renderbuffer->format.width * snd_renderbuffer->format.channels;
1276                 memset(snd_renderbuffer->ring, clear, memsize);
1277
1278                 if (!simsound)
1279                         SndSys_UnlockRenderBuffer ();
1280         }
1281 }
1282
1283 void S_PauseGameSounds (qboolean toggle)
1284 {
1285         unsigned int i;
1286
1287         for (i = 0; i < total_channels; i++)
1288         {
1289                 channel_t *ch;
1290
1291                 ch = &channels[i];
1292                 if (ch->sfx != NULL && ! (ch->flags & CHANNELFLAG_LOCALSOUND))
1293                         S_SetChannelFlag (i, CHANNELFLAG_PAUSED, toggle);
1294         }
1295 }
1296
1297 void S_SetChannelVolume (unsigned int ch_ind, float fvol)
1298 {
1299         channels[ch_ind].master_vol = (int)(fvol * 255.0f);
1300 }
1301
1302
1303 /*
1304 =================
1305 S_StaticSound
1306 =================
1307 */
1308 void S_StaticSound (sfx_t *sfx, vec3_t origin, float fvol, float attenuation)
1309 {
1310         channel_t       *target_chan;
1311
1312         if (snd_renderbuffer == NULL || sfx == NULL || nosound.integer)
1313                 return;
1314         if (!sfx->fetcher)
1315         {
1316                 Con_DPrintf ("S_StaticSound: \"%s\" hasn't been precached\n", sfx->name);
1317                 return;
1318         }
1319
1320         if (total_channels == MAX_CHANNELS)
1321         {
1322                 Con_Print("S_StaticSound: total_channels == MAX_CHANNELS\n");
1323                 return;
1324         }
1325
1326         target_chan = &channels[total_channels++];
1327         S_PlaySfxOnChannel (sfx, target_chan, CHANNELFLAG_FORCELOOP, origin, fvol, attenuation, true);
1328
1329         SND_Spatialize (target_chan, true);
1330 }
1331
1332
1333 /*
1334 ===================
1335 S_UpdateAmbientSounds
1336 ===================
1337 */
1338 void S_UpdateAmbientSounds (void)
1339 {
1340         int                     i;
1341         int                     vol;
1342         int                     ambient_channel;
1343         channel_t       *chan;
1344         unsigned char           ambientlevels[NUM_AMBIENTS];
1345
1346         memset(ambientlevels, 0, sizeof(ambientlevels));
1347         if (cl.worldmodel && cl.worldmodel->brush.AmbientSoundLevelsForPoint)
1348                 cl.worldmodel->brush.AmbientSoundLevelsForPoint(cl.worldmodel, listener_origin, ambientlevels, sizeof(ambientlevels));
1349
1350         // Calc ambient sound levels
1351         for (ambient_channel = 0 ; ambient_channel< NUM_AMBIENTS ; ambient_channel++)
1352         {
1353                 chan = &channels[ambient_channel];
1354                 if (chan->sfx == NULL || chan->sfx->fetcher == NULL)
1355                         continue;
1356
1357                 vol = (int)ambientlevels[ambient_channel];
1358                 if (vol < 8)
1359                         vol = 0;
1360
1361                 // Don't adjust volume too fast
1362                 // FIXME: this rounds off to an int each frame, meaning there is little to no fade at extremely high framerates!
1363                 if (chan->master_vol < vol)
1364                 {
1365                         chan->master_vol += (int)(cl.realframetime * ambient_fade.value);
1366                         if (chan->master_vol > vol)
1367                                 chan->master_vol = vol;
1368                 }
1369                 else if (chan->master_vol > vol)
1370                 {
1371                         chan->master_vol -= (int)(cl.realframetime * ambient_fade.value);
1372                         if (chan->master_vol < vol)
1373                                 chan->master_vol = vol;
1374                 }
1375
1376                 for (i = 0;i < SND_LISTENERS;i++)
1377                         chan->listener_volume[i] = (int)(chan->master_vol * ambient_level.value * snd_speakerlayout.listeners[i].ambientvolume);
1378         }
1379 }
1380
1381 static void S_PaintAndSubmit (void)
1382 {
1383         unsigned int newsoundtime, paintedtime, endtime, maxtime, usedframes;
1384
1385         if (snd_renderbuffer == NULL || nosound.integer)
1386                 return;
1387
1388         if (snd_blocked > 0 && !cls.capturevideo_soundfile)
1389                 return;
1390
1391         // Update sound time
1392         if (cls.capturevideo_soundfile) // SUPER NASTY HACK to record non-realtime sound
1393                 newsoundtime = (unsigned int)((double)cls.capturevideo_frame * (double)snd_renderbuffer->format.speed / (double)cls.capturevideo_framerate);
1394         else if (simsound)
1395                 newsoundtime = (unsigned int)((realtime - snd_starttime) * (double)snd_renderbuffer->format.speed);
1396         else
1397                 newsoundtime = SndSys_GetSoundTime();
1398
1399         newsoundtime += extrasoundtime;
1400         if (newsoundtime < soundtime)
1401         {
1402                 if ((cls.capturevideo_soundfile != NULL) != recording_sound)
1403                 {
1404                         unsigned int additionaltime;
1405
1406                         // add some time to extrasoundtime make newsoundtime higher
1407
1408                         // The extra time must be a multiple of the render buffer size
1409                         // to avoid modifying the current position in the buffer,
1410                         // some modules write directly to a shared (DMA) buffer
1411                         additionaltime = (soundtime - newsoundtime) + snd_renderbuffer->maxframes - 1;
1412                         additionaltime -= additionaltime % snd_renderbuffer->maxframes;
1413
1414                         extrasoundtime += additionaltime;
1415                         newsoundtime += additionaltime;
1416                         Con_DPrintf("S_PaintAndSubmit: new extra sound time = %u\n",
1417                                                 extrasoundtime);
1418                 }
1419                 else
1420                         Con_Printf("S_PaintAndSubmit: WARNING: newsoundtime < soundtime (%u < %u)\n",
1421                                            newsoundtime, soundtime);
1422         }
1423         soundtime = newsoundtime;
1424         recording_sound = (cls.capturevideo_soundfile != NULL);
1425
1426         // Check to make sure that we haven't overshot
1427         paintedtime = snd_renderbuffer->endframe;
1428         if (paintedtime < soundtime)
1429                 paintedtime = soundtime;
1430
1431         // mix ahead of current position
1432         endtime = soundtime + (unsigned int)(_snd_mixahead.value * (float)snd_renderbuffer->format.speed);
1433         usedframes = snd_renderbuffer->endframe - snd_renderbuffer->startframe;
1434         maxtime = paintedtime + snd_renderbuffer->maxframes - usedframes;
1435         endtime = min(endtime, maxtime);
1436
1437         S_PaintChannels(snd_renderbuffer, paintedtime, endtime);
1438
1439         if (simsound)
1440                 snd_renderbuffer->startframe = snd_renderbuffer->endframe;
1441         else
1442                 SndSys_Submit();
1443 }
1444
1445 /*
1446 ============
1447 S_Update
1448
1449 Called once each time through the main loop
1450 ============
1451 */
1452 void S_Update(const matrix4x4_t *listenermatrix)
1453 {
1454         unsigned int i, j, total;
1455         channel_t *ch, *combine;
1456         matrix4x4_t basematrix, rotatematrix;
1457
1458         if (snd_renderbuffer == NULL || nosound.integer)
1459                 return;
1460
1461         if (snd_blocked > 0 && !cls.capturevideo_soundfile)
1462                 return;
1463
1464         // If snd_swapstereo or snd_channellayout has changed, recompute the channel layout
1465         if (current_swapstereo != snd_swapstereo.integer ||
1466                 current_channellayout != snd_channellayout.integer)
1467                 S_SetChannelLayout();
1468
1469         Matrix4x4_Invert_Simple(&basematrix, listenermatrix);
1470         Matrix4x4_OriginFromMatrix(listenermatrix, listener_origin);
1471
1472         // calculate the current matrices
1473         for (j = 0;j < SND_LISTENERS;j++)
1474         {
1475                 Matrix4x4_CreateFromQuakeEntity(&rotatematrix, 0, 0, 0, 0, -snd_speakerlayout.listeners[j].yawangle, 0, 1);
1476                 Matrix4x4_Concat(&listener_matrix[j], &rotatematrix, &basematrix);
1477                 // I think this should now do this:
1478                 //   1. create a rotation matrix for rotating by e.g. -90 degrees CCW
1479                 //      (note: the matrix will rotate the OBJECT, not the VIEWER, so its
1480                 //       angle has to be taken negative)
1481                 //   2. create a transform which first rotates and moves its argument
1482                 //      into the player's view coordinates (using basematrix which is
1483                 //      an inverted "absolute" listener matrix), then applies the
1484                 //      rotation matrix for the ear
1485                 // Isn't Matrix4x4_CreateFromQuakeEntity a bit misleading because this
1486                 // does not actually refer to an entity?
1487         }
1488
1489         // update general area ambient sound sources
1490         S_UpdateAmbientSounds ();
1491
1492         combine = NULL;
1493
1494         // update spatialization for static and dynamic sounds
1495         ch = channels+NUM_AMBIENTS;
1496         for (i=NUM_AMBIENTS ; i<total_channels; i++, ch++)
1497         {
1498                 if (!ch->sfx)
1499                         continue;
1500
1501                 // respatialize channel
1502                 SND_Spatialize(ch, i >= MAX_DYNAMIC_CHANNELS + NUM_AMBIENTS);
1503
1504                 // try to combine static sounds with a previous channel of the same
1505                 // sound effect so we don't mix five torches every frame
1506                 if (i > MAX_DYNAMIC_CHANNELS + NUM_AMBIENTS)
1507                 {
1508                         // no need to merge silent channels
1509                         for (j = 0;j < SND_LISTENERS;j++)
1510                                 if (ch->listener_volume[j])
1511                                         break;
1512                         if (j == SND_LISTENERS)
1513                                 continue;
1514                         // if the last combine chosen isn't suitable, find a new one
1515                         if (!(combine && combine != ch && combine->sfx == ch->sfx))
1516                         {
1517                                 // search for one
1518                                 combine = NULL;
1519                                 for (j = MAX_DYNAMIC_CHANNELS + NUM_AMBIENTS;j < i;j++)
1520                                 {
1521                                         if (channels[j].sfx == ch->sfx)
1522                                         {
1523                                                 combine = channels + j;
1524                                                 break;
1525                                         }
1526                                 }
1527                         }
1528                         if (combine && combine != ch && combine->sfx == ch->sfx)
1529                         {
1530                                 for (j = 0;j < SND_LISTENERS;j++)
1531                                 {
1532                                         combine->listener_volume[j] += ch->listener_volume[j];
1533                                         ch->listener_volume[j] = 0;
1534                                 }
1535                         }
1536                 }
1537         }
1538
1539         sound_spatialized = true;
1540
1541         // debugging output
1542         if (snd_show.integer)
1543         {
1544                 total = 0;
1545                 ch = channels;
1546                 for (i=0 ; i<total_channels; i++, ch++)
1547                 {
1548                         if (ch->sfx)
1549                         {
1550                                 for (j = 0;j < SND_LISTENERS;j++)
1551                                         if (ch->listener_volume[j])
1552                                                 break;
1553                                 if (j < SND_LISTENERS)
1554                                         total++;
1555                         }
1556                 }
1557
1558                 Con_Printf("----(%u)----\n", total);
1559         }
1560
1561         S_PaintAndSubmit();
1562 }
1563
1564 void S_ExtraUpdate (void)
1565 {
1566         if (snd_noextraupdate.integer || !sound_spatialized)
1567                 return;
1568
1569         S_PaintAndSubmit();
1570 }
1571
1572 qboolean S_LocalSound (const char *sound)
1573 {
1574         sfx_t   *sfx;
1575         int             ch_ind;
1576
1577         if (!snd_initialized.integer || nosound.integer)
1578                 return true;
1579
1580         sfx = S_PrecacheSound (sound, true, false);
1581         if (!sfx)
1582         {
1583                 Con_Printf("S_LocalSound: can't precache %s\n", sound);
1584                 return false;
1585         }
1586
1587         // Local sounds must not be freed
1588         sfx->flags |= SFXFLAG_PERMANENTLOCK;
1589
1590         ch_ind = S_StartSound (cl.viewentity, 0, sfx, vec3_origin, 1, 0);
1591         if (ch_ind < 0)
1592                 return false;
1593
1594         channels[ch_ind].flags |= CHANNELFLAG_LOCALSOUND;
1595         return true;
1596 }