snd_main.c

   1 /*
   2 Copyright (C) 1996-1997 Id Software, Inc.
   3
   4 This program is free software; you can redistribute it and/or
   5 modify it under the terms of the GNU General Public License
   6 as published by the Free Software Foundation; either version 2
   7 of the License, or (at your option) any later version.
   8
   9 This program is distributed in the hope that it will be useful,
  10 but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  12
  13 See the GNU General Public License for more details.
  14
  15 You should have received a copy of the GNU General Public License
  16 along with this program; if not, write to the Free Software
  17 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  18
  19 */
  20 // snd_main.c -- main control for any streaming sound output device
  21
  22 #include "quakedef.h"
  23
  24 #include "snd_main.h"
  25 #include "snd_ogg.h"
  26 #include "csprogs.h"
  27 #include "cl_collision.h"
  28 #ifdef CONFIG_CD
  29 #include "cdaudio.h"
  30 #endif
  31
  32
  33 #define SND_MIN_SPEED 8000
  34 #define SND_MAX_SPEED 192000
  35 #define SND_MIN_WIDTH 1
  36 #define SND_MAX_WIDTH 2
  37 #define SND_MIN_CHANNELS 1
  38 #define SND_MAX_CHANNELS 8
  39 #if SND_LISTENERS != 8
  40 #       error this data only supports up to 8 channel, update it!
  41 #endif
  42
  43 speakerlayout_t snd_speakerlayout;
  44
  45 // Our speaker layouts are based on ALSA. They differ from those
  46 // Win32 and Mac OS X APIs use when there's more than 4 channels.
  47 // (rear left + rear right, and front center + LFE are swapped).
  48 #define SND_SPEAKERLAYOUTS (sizeof(snd_speakerlayouts) / sizeof(snd_speakerlayouts[0]))
  49 static const speakerlayout_t snd_speakerlayouts[] =
  50 {
  51         {
  52                 "surround71", 8,
  53                 {
  54                         {0, 45, 0.2f, 0.2f, 0.5f}, // front left
  55                         {1, 315, 0.2f, 0.2f, 0.5f}, // front right
  56                         {2, 135, 0.2f, 0.2f, 0.5f}, // rear left
  57                         {3, 225, 0.2f, 0.2f, 0.5f}, // rear right
  58                         {4, 0, 0.2f, 0.2f, 0.5f}, // front center
  59                         {5, 0, 0, 0, 0}, // lfe (we don't have any good lfe sound sources and it would take some filtering work to generate them (and they'd probably still be wrong), so...  no lfe)
  60                         {6, 90, 0.2f, 0.2f, 0.5f}, // side left
  61                         {7, 180, 0.2f, 0.2f, 0.5f}, // side right
  62                 }
  63         },
  64         {
  65                 "surround51", 6,
  66                 {
  67                         {0, 45, 0.2f, 0.2f, 0.5f}, // front left
  68                         {1, 315, 0.2f, 0.2f, 0.5f}, // front right
  69                         {2, 135, 0.2f, 0.2f, 0.5f}, // rear left
  70                         {3, 225, 0.2f, 0.2f, 0.5f}, // rear right
  71                         {4, 0, 0.2f, 0.2f, 0.5f}, // front center
  72                         {5, 0, 0, 0, 0}, // lfe (we don't have any good lfe sound sources and it would take some filtering work to generate them (and they'd probably still be wrong), so...  no lfe)
  73                         {0, 0, 0, 0, 0},
  74                         {0, 0, 0, 0, 0},
  75                 }
  76         },
  77         {
  78                 // these systems sometimes have a subwoofer as well, but it has no
  79                 // channel of its own
  80                 "surround40", 4,
  81                 {
  82                         {0, 45, 0.3f, 0.3f, 0.8f}, // front left
  83                         {1, 315, 0.3f, 0.3f, 0.8f}, // front right
  84                         {2, 135, 0.3f, 0.3f, 0.8f}, // rear left
  85                         {3, 225, 0.3f, 0.3f, 0.8f}, // rear right
  86                         {0, 0, 0, 0, 0},
  87                         {0, 0, 0, 0, 0},
  88                         {0, 0, 0, 0, 0},
  89                         {0, 0, 0, 0, 0},
  90                 }
  91         },
  92         {
  93                 // these systems sometimes have a subwoofer as well, but it has no
  94                 // channel of its own
  95                 "stereo", 2,
  96                 {
  97                         {0, 90, 0.5f, 0.5f, 1}, // side left
  98                         {1, 270, 0.5f, 0.5f, 1}, // side right
  99                         {0, 0, 0, 0, 0},
 100                         {0, 0, 0, 0, 0},
 101                         {0, 0, 0, 0, 0},
 102                         {0, 0, 0, 0, 0},
 103                         {0, 0, 0, 0, 0},
 104                         {0, 0, 0, 0, 0},
 105                 }
 106         },
 107         {
 108                 "mono", 1,
 109                 {
 110                         {0, 0, 0, 1, 1}, // center
 111                         {0, 0, 0, 0, 0},
 112                         {0, 0, 0, 0, 0},
 113                         {0, 0, 0, 0, 0},
 114                         {0, 0, 0, 0, 0},
 115                         {0, 0, 0, 0, 0},
 116                         {0, 0, 0, 0, 0},
 117                         {0, 0, 0, 0, 0},
 118                 }
 119         }
 120 };
 121
 122
 123 // =======================================================================
 124 // Internal sound data & structures
 125 // =======================================================================
 126
 127 channel_t channels[MAX_CHANNELS];
 128 unsigned int total_channels;
 129
 130 snd_ringbuffer_t *snd_renderbuffer = NULL;
 131 static unsigned int soundtime = 0;
 132 static unsigned int oldpaintedtime = 0;
 133 static unsigned int extrasoundtime = 0;
 134 static double snd_starttime = 0.0;
 135 qboolean snd_threaded = false;
 136 qboolean snd_usethreadedmixing = false;
 137
 138 vec3_t listener_origin;
 139 matrix4x4_t listener_basematrix;
 140 static unsigned char *listener_pvs = NULL;
 141 static int listener_pvsbytes = 0;
 142 matrix4x4_t listener_matrix[SND_LISTENERS];
 143 mempool_t *snd_mempool;
 144
 145 // Linked list of known sfx
 146 static sfx_t *known_sfx = NULL;
 147
 148 static qboolean sound_spatialized = false;
 149
 150 qboolean simsound = false;
 151
 152 static qboolean recording_sound = false;
 153
 154 int snd_blocked = 0;
 155 static int current_swapstereo = false;
 156 static int current_channellayout = SND_CHANNELLAYOUT_AUTO;
 157 static int current_channellayout_used = SND_CHANNELLAYOUT_AUTO;
 158
 159 static float spatialpower, spatialmin, spatialdiff, spatialoffset, spatialfactor;
 160 typedef enum { SPATIAL_NONE, SPATIAL_LOG, SPATIAL_POW, SPATIAL_THRESH } spatialmethod_t;
 161 spatialmethod_t spatialmethod;
 162
 163 // Cvars declared in sound.h (part of the sound API)
 164 cvar_t bgmvolume = {CVAR_SAVE, "bgmvolume", "1", "volume of background music (such as CD music or replacement files such as sound/cdtracks/track002.ogg)"};
 165 cvar_t mastervolume = {CVAR_SAVE, "mastervolume", "0.7", "master volume"};
 166 cvar_t volume = {CVAR_SAVE, "volume", "0.7", "volume of sound effects"};
 167 cvar_t snd_initialized = { CVAR_READONLY, "snd_initialized", "0", "indicates the sound subsystem is active"};
 168 cvar_t snd_staticvolume = {CVAR_SAVE, "snd_staticvolume", "1", "volume of ambient sound effects (such as swampy sounds at the start of e1m2)"};
 169 cvar_t snd_soundradius = {CVAR_SAVE, "snd_soundradius", "1200", "radius of weapon sounds and other standard sound effects (monster idle noises are half this radius and flickering light noises are one third of this radius)"};
 170 cvar_t snd_attenuation_exponent = {CVAR_SAVE, "snd_attenuation_exponent", "1", "Exponent of (1-radius) in sound attenuation formula"};
 171 cvar_t snd_attenuation_decibel = {CVAR_SAVE, "snd_attenuation_decibel", "0", "Decibel sound attenuation per sound radius distance"};
 172 cvar_t snd_spatialization_min_radius = {CVAR_SAVE, "snd_spatialization_min_radius", "10000", "use minimum spatialization above to this radius"};
 173 cvar_t snd_spatialization_max_radius = {CVAR_SAVE, "snd_spatialization_max_radius", "100", "use maximum spatialization below this radius"};
 174 cvar_t snd_spatialization_min = {CVAR_SAVE, "snd_spatialization_min", "0.70", "minimum spatializazion of sounds"};
 175 cvar_t snd_spatialization_max = {CVAR_SAVE, "snd_spatialization_max", "0.95", "maximum spatialization of sounds"};
 176 cvar_t snd_spatialization_power = {CVAR_SAVE, "snd_spatialization_power", "0", "exponent of the spatialization falloff curve (0: logarithmic)"};
 177 cvar_t snd_spatialization_control = {CVAR_SAVE, "snd_spatialization_control", "0", "enable spatialization control (headphone friendly mode)"};
 178 cvar_t snd_spatialization_prologic = {CVAR_SAVE, "snd_spatialization_prologic", "0", "use dolby prologic (I, II or IIx) encoding (snd_channels must be 2)"};
 179 cvar_t snd_spatialization_prologic_frontangle = {CVAR_SAVE, "snd_spatialization_prologic_frontangle", "30", "the angle between the front speakers and the center speaker"};
 180 cvar_t snd_spatialization_occlusion = {CVAR_SAVE, "snd_spatialization_occlusion", "1", "enable occlusion testing on spatialized sounds, which simply quiets sounds that are blocked by the world; 1 enables PVS method, 2 enables LineOfSight method, 3 enables both"};
 181
 182 // Cvars declared in snd_main.h (shared with other snd_*.c files)
 183 cvar_t _snd_mixahead = {CVAR_SAVE, "_snd_mixahead", "0.15", "how much sound to mix ahead of time"};
 184 cvar_t snd_streaming = { CVAR_SAVE, "snd_streaming", "1", "enables keeping compressed ogg sound files compressed, decompressing them only as needed, otherwise they will be decompressed completely at load (may use a lot of memory); when set to 2, streaming is performed even if this would waste memory"};
 185 cvar_t snd_streaming_length = { CVAR_SAVE, "snd_streaming_length", "1", "decompress sounds completely if they are less than this play time when snd_streaming is 1"};
 186 cvar_t snd_swapstereo = {CVAR_SAVE, "snd_swapstereo", "0", "swaps left/right speakers for old ISA soundblaster cards"};
 187 extern cvar_t v_flipped;
 188 cvar_t snd_channellayout = {0, "snd_channellayout", "0", "channel layout. Can be 0 (auto - snd_restart needed), 1 (standard layout), or 2 (ALSA layout)"};
 189 cvar_t snd_mutewhenidle = {CVAR_SAVE, "snd_mutewhenidle", "1", "whether to disable sound output when game window is inactive"};
 190 cvar_t snd_maxchannelvolume = {CVAR_SAVE, "snd_maxchannelvolume", "10", "maximum volume of a single sound"};
 191 cvar_t snd_softclip = {CVAR_SAVE, "snd_softclip", "0", "Use soft-clipping. Soft-clipping can make the sound more smooth if very high volume levels are used. Enable this option if the dynamic range of the loudspeakers is very low. WARNING: This feature creates distortion and should be considered a last resort."};
 192 //cvar_t snd_softclip = {CVAR_SAVE, "snd_softclip", "0", "Use soft-clipping (when set to 2, use it even if output is floating point). Soft-clipping can make the sound more smooth if very high volume levels are used. Enable this option if the dynamic range of the loudspeakers is very low. WARNING: This feature creates distortion and should be considered a last resort."};
 193 cvar_t snd_entchannel0volume = {CVAR_SAVE, "snd_entchannel0volume", "1", "volume multiplier of the auto-allocate entity channel of regular entities (DEPRECATED)"};
 194 cvar_t snd_entchannel1volume = {CVAR_SAVE, "snd_entchannel1volume", "1", "volume multiplier of the 1st entity channel of regular entities (DEPRECATED)"};
 195 cvar_t snd_entchannel2volume = {CVAR_SAVE, "snd_entchannel2volume", "1", "volume multiplier of the 2nd entity channel of regular entities (DEPRECATED)"};
 196 cvar_t snd_entchannel3volume = {CVAR_SAVE, "snd_entchannel3volume", "1", "volume multiplier of the 3rd entity channel of regular entities (DEPRECATED)"};
 197 cvar_t snd_entchannel4volume = {CVAR_SAVE, "snd_entchannel4volume", "1", "volume multiplier of the 4th entity channel of regular entities (DEPRECATED)"};
 198 cvar_t snd_entchannel5volume = {CVAR_SAVE, "snd_entchannel5volume", "1", "volume multiplier of the 5th entity channel of regular entities (DEPRECATED)"};
 199 cvar_t snd_entchannel6volume = {CVAR_SAVE, "snd_entchannel6volume", "1", "volume multiplier of the 6th entity channel of regular entities (DEPRECATED)"};
 200 cvar_t snd_entchannel7volume = {CVAR_SAVE, "snd_entchannel7volume", "1", "volume multiplier of the 7th entity channel of regular entities (DEPRECATED)"};
 201 cvar_t snd_playerchannel0volume = {CVAR_SAVE, "snd_playerchannel0volume", "1", "volume multiplier of the auto-allocate entity channel of player entities (DEPRECATED)"};
 202 cvar_t snd_playerchannel1volume = {CVAR_SAVE, "snd_playerchannel1volume", "1", "volume multiplier of the 1st entity channel of player entities (DEPRECATED)"};
 203 cvar_t snd_playerchannel2volume = {CVAR_SAVE, "snd_playerchannel2volume", "1", "volume multiplier of the 2nd entity channel of player entities (DEPRECATED)"};
 204 cvar_t snd_playerchannel3volume = {CVAR_SAVE, "snd_playerchannel3volume", "1", "volume multiplier of the 3rd entity channel of player entities (DEPRECATED)"};
 205 cvar_t snd_playerchannel4volume = {CVAR_SAVE, "snd_playerchannel4volume", "1", "volume multiplier of the 4th entity channel of player entities (DEPRECATED)"};
 206 cvar_t snd_playerchannel5volume = {CVAR_SAVE, "snd_playerchannel5volume", "1", "volume multiplier of the 5th entity channel of player entities (DEPRECATED)"};
 207 cvar_t snd_playerchannel6volume = {CVAR_SAVE, "snd_playerchannel6volume", "1", "volume multiplier of the 6th entity channel of player entities (DEPRECATED)"};
 208 cvar_t snd_playerchannel7volume = {CVAR_SAVE, "snd_playerchannel7volume", "1", "volume multiplier of the 7th entity channel of player entities (DEPRECATED)"};
 209 cvar_t snd_worldchannel0volume = {CVAR_SAVE, "snd_worldchannel0volume", "1", "volume multiplier of the auto-allocate entity channel of the world entity (DEPRECATED)"};
 210 cvar_t snd_worldchannel1volume = {CVAR_SAVE, "snd_worldchannel1volume", "1", "volume multiplier of the 1st entity channel of the world entity (DEPRECATED)"};
 211 cvar_t snd_worldchannel2volume = {CVAR_SAVE, "snd_worldchannel2volume", "1", "volume multiplier of the 2nd entity channel of the world entity (DEPRECATED)"};
 212 cvar_t snd_worldchannel3volume = {CVAR_SAVE, "snd_worldchannel3volume", "1", "volume multiplier of the 3rd entity channel of the world entity (DEPRECATED)"};
 213 cvar_t snd_worldchannel4volume = {CVAR_SAVE, "snd_worldchannel4volume", "1", "volume multiplier of the 4th entity channel of the world entity (DEPRECATED)"};
 214 cvar_t snd_worldchannel5volume = {CVAR_SAVE, "snd_worldchannel5volume", "1", "volume multiplier of the 5th entity channel of the world entity (DEPRECATED)"};
 215 cvar_t snd_worldchannel6volume = {CVAR_SAVE, "snd_worldchannel6volume", "1", "volume multiplier of the 6th entity channel of the world entity (DEPRECATED)"};
 216 cvar_t snd_worldchannel7volume = {CVAR_SAVE, "snd_worldchannel7volume", "1", "volume multiplier of the 7th entity channel of the world entity (DEPRECATED)"};
 217 cvar_t snd_csqcchannel0volume = {CVAR_SAVE, "snd_csqcchannel0volume", "1", "volume multiplier of the auto-allocate entity channel CSQC entities (DEPRECATED)"};
 218 cvar_t snd_csqcchannel1volume = {CVAR_SAVE, "snd_csqcchannel1volume", "1", "volume multiplier of the 1st entity channel of CSQC entities (DEPRECATED)"};
 219 cvar_t snd_csqcchannel2volume = {CVAR_SAVE, "snd_csqcchannel2volume", "1", "volume multiplier of the 2nd entity channel of CSQC entities (DEPRECATED)"};
 220 cvar_t snd_csqcchannel3volume = {CVAR_SAVE, "snd_csqcchannel3volume", "1", "volume multiplier of the 3rd entity channel of CSQC entities (DEPRECATED)"};
 221 cvar_t snd_csqcchannel4volume = {CVAR_SAVE, "snd_csqcchannel4volume", "1", "volume multiplier of the 4th entity channel of CSQC entities (DEPRECATED)"};
 222 cvar_t snd_csqcchannel5volume = {CVAR_SAVE, "snd_csqcchannel5volume", "1", "volume multiplier of the 5th entity channel of CSQC entities (DEPRECATED)"};
 223 cvar_t snd_csqcchannel6volume = {CVAR_SAVE, "snd_csqcchannel6volume", "1", "volume multiplier of the 6th entity channel of CSQC entities (DEPRECATED)"};
 224 cvar_t snd_csqcchannel7volume = {CVAR_SAVE, "snd_csqcchannel7volume", "1", "volume multiplier of the 7th entity channel of CSQC entities (DEPRECATED)"};
 225 cvar_t snd_channel0volume = {CVAR_SAVE, "snd_channel0volume", "1", "volume multiplier of the auto-allocate entity channel"};
 226 cvar_t snd_channel1volume = {CVAR_SAVE, "snd_channel1volume", "1", "volume multiplier of the 1st entity channel"};
 227 cvar_t snd_channel2volume = {CVAR_SAVE, "snd_channel2volume", "1", "volume multiplier of the 2nd entity channel"};
 228 cvar_t snd_channel3volume = {CVAR_SAVE, "snd_channel3volume", "1", "volume multiplier of the 3rd entity channel"};
 229 cvar_t snd_channel4volume = {CVAR_SAVE, "snd_channel4volume", "1", "volume multiplier of the 4th entity channel"};
 230 cvar_t snd_channel5volume = {CVAR_SAVE, "snd_channel5volume", "1", "volume multiplier of the 5th entity channel"};
 231 cvar_t snd_channel6volume = {CVAR_SAVE, "snd_channel6volume", "1", "volume multiplier of the 6th entity channel"};
 232 cvar_t snd_channel7volume = {CVAR_SAVE, "snd_channel7volume", "1", "volume multiplier of the 7th entity channel"};
 233
 234 // Local cvars
 235 static cvar_t nosound = {0, "nosound", "0", "disables sound"};
 236 static cvar_t snd_precache = {0, "snd_precache", "1", "loads sounds before they are used"};
 237 static cvar_t ambient_level = {0, "ambient_level", "0.3", "volume of environment noises (water and wind)"};
 238 static cvar_t ambient_fade = {0, "ambient_fade", "100", "rate of volume fading when moving from one environment to another"};
 239 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"};
 240 static cvar_t snd_show = {0, "snd_show", "0", "shows some statistics about sound mixing"};
 241
 242 // Default sound format is 48KHz, 16-bit, stereo
 243 // (48KHz because a lot of onboard sound cards sucks at any other speed)
 244 static cvar_t snd_speed = {CVAR_SAVE, "snd_speed", "48000", "sound output frequency, in hertz"};
 245 static cvar_t snd_width = {CVAR_SAVE, "snd_width", "2", "sound output precision, in bytes (1 and 2 supported)"};
 246 static cvar_t snd_channels = {CVAR_SAVE, "snd_channels", "2", "number of channels for the sound output (2 for stereo; up to 8 supported for 3D sound)"};
 247
 248 static cvar_t snd_startloopingsounds = {0, "snd_startloopingsounds", "1", "whether to start sounds that would loop (you want this to be 1); existing sounds are not affected"};
 249 static cvar_t snd_startnonloopingsounds = {0, "snd_startnonloopingsounds", "1", "whether to start sounds that would not loop (you want this to be 1); existing sounds are not affected"};
 250
 251 // randomization
 252 static cvar_t snd_identicalsoundrandomization_time = {0, "snd_identicalsoundrandomization_time", "0.1", "how much seconds to randomly skip (positive) or delay (negative) sounds when multiple identical sounds are started on the same frame"};
 253 static cvar_t snd_identicalsoundrandomization_tics = {0, "snd_identicalsoundrandomization_tics", "0", "if nonzero, how many tics to limit sound randomization as defined by snd_identicalsoundrandomization_time"};
 254
 255 // Ambient sounds
 256 static sfx_t* ambient_sfxs [2] = { NULL, NULL };
 257 static const char* ambient_names [2] = { "sound/ambience/water1.wav", "sound/ambience/wind2.wav" };
 258
 259
 260 // ====================================================================
 261 // Functions
 262 // ====================================================================
 263
 264 void S_FreeSfx (sfx_t *sfx, qboolean force);
 265
 266 static void S_Play_Common (float fvol, float attenuation)
 267 {
 268         int i, ch_ind;
 269         char name [MAX_QPATH];
 270         sfx_t *sfx;
 271
 272         i = 1;
 273         while (i < Cmd_Argc ())
 274         {
 275                 // Get the name, and appends ".wav" as an extension if there's none
 276                 strlcpy (name, Cmd_Argv (i), sizeof (name));
 277                 if (!strrchr (name, '.'))
 278                         strlcat (name, ".wav", sizeof (name));
 279                 i++;
 280
 281                 // If we need to get the volume from the command line
 282                 if (fvol == -1.0f)
 283                 {
 284                         fvol = atof (Cmd_Argv (i));
 285                         i++;
 286                 }
 287
 288                 sfx = S_PrecacheSound (name, true, true);
 289                 if (sfx)
 290                 {
 291                         ch_ind = S_StartSound (-1, 0, sfx, listener_origin, fvol, attenuation);
 292
 293                         // Free the sfx if the file didn't exist
 294                         if (!sfx->fetcher)
 295                                 S_FreeSfx (sfx, false);
 296                         else
 297                                 channels[ch_ind].flags |= CHANNELFLAG_LOCALSOUND;
 298                 }
 299         }
 300 }
 301
 302 static void S_Play_f(void)
 303 {
 304         S_Play_Common (1.0f, 1.0f);
 305 }
 306
 307 static void S_Play2_f(void)
 308 {
 309         S_Play_Common (1.0f, 0.0f);
 310 }
 311
 312 static void S_PlayVol_f(void)
 313 {
 314         S_Play_Common (-1.0f, 0.0f);
 315 }
 316
 317 static void S_SoundList_f (void)
 318 {
 319         unsigned int i;
 320         sfx_t *sfx;
 321         unsigned int total;
 322
 323         total = 0;
 324         for (sfx = known_sfx, i = 0; sfx != NULL; sfx = sfx->next, i++)
 325         {
 326                 if (sfx->fetcher != NULL)
 327                 {
 328                         unsigned int size;
 329
 330                         size = (unsigned int)sfx->memsize;
 331                         Con_Printf ("%c%c%c(%5iHz %2db %6s) %8i : %s\n",
 332                                                 (sfx->loopstart < sfx->total_length) ? 'L' : ' ',
 333                                                 (sfx->flags & SFXFLAG_STREAMED) ? 'S' : ' ',
 334                                                 (sfx->flags & SFXFLAG_MENUSOUND) ? 'P' : ' ',
 335                                                 sfx->format.speed,
 336                                                 sfx->format.width * 8,
 337                                                 (sfx->format.channels == 1) ? "mono" : "stereo",
 338                                                 size,
 339                                                 sfx->name);
 340                         total += size;
 341                 }
 342                 else
 343                         Con_Printf ("    (  unknown  ) unloaded : %s\n", sfx->name);
 344         }
 345         Con_Printf("Total resident: %i\n", total);
 346 }
 347
 348
 349 static void S_SoundInfo_f(void)
 350 {
 351         if (snd_renderbuffer == NULL)
 352         {
 353                 Con_Print("sound system not started\n");
 354                 return;
 355         }
 356
 357         Con_Printf("%5d speakers\n", snd_renderbuffer->format.channels);
 358         Con_Printf("%5d frames\n", snd_renderbuffer->maxframes);
 359         Con_Printf("%5d samplebits\n", snd_renderbuffer->format.width * 8);
 360         Con_Printf("%5d speed\n", snd_renderbuffer->format.speed);
 361         Con_Printf("%5u total_channels\n", total_channels);
 362 }
 363
 364
 365 int S_GetSoundRate(void)
 366 {
 367         return snd_renderbuffer ? snd_renderbuffer->format.speed : 0;
 368 }
 369
 370 int S_GetSoundChannels(void)
 371 {
 372         return snd_renderbuffer ? snd_renderbuffer->format.channels : 0;
 373 }
 374
 375
 376 static qboolean S_ChooseCheaperFormat (snd_format_t* format, qboolean fixed_speed, qboolean fixed_width, qboolean fixed_channels)
 377 {
 378         static const snd_format_t thresholds [] =
 379         {
 380                 // speed                        width                   channels
 381                 { SND_MIN_SPEED,        SND_MIN_WIDTH,  SND_MIN_CHANNELS },
 382                 { 11025,                        1,                              2 },
 383                 { 22050,                        2,                              2 },
 384                 { 44100,                        2,                              2 },
 385                 { 48000,                        2,                              6 },
 386                 { 96000,                        2,                              6 },
 387                 { SND_MAX_SPEED,        SND_MAX_WIDTH,  SND_MAX_CHANNELS },
 388         };
 389         const unsigned int nb_thresholds = sizeof(thresholds) / sizeof(thresholds[0]);
 390         unsigned int speed_level, width_level, channels_level;
 391
 392         // If we have reached the minimum values, there's nothing more we can do
 393         if ((format->speed == thresholds[0].speed || fixed_speed) &&
 394                 (format->width == thresholds[0].width || fixed_width) &&
 395                 (format->channels == thresholds[0].channels || fixed_channels))
 396                 return false;
 397
 398         // Check the min and max values
 399         #define CHECK_BOUNDARIES(param)                                                         \
 400         if (format->param < thresholds[0].param)                                        \
 401         {                                                                                                                       \
 402                 format->param = thresholds[0].param;                                    \
 403                 return true;                                                                                    \
 404         }                                                                                                                       \
 405         if (format->param > thresholds[nb_thresholds - 1].param)        \
 406         {                                                                                                                       \
 407                 format->param = thresholds[nb_thresholds - 1].param;    \
 408                 return true;                                                                                    \
 409         }
 410         CHECK_BOUNDARIES(speed);
 411         CHECK_BOUNDARIES(width);
 412         CHECK_BOUNDARIES(channels);
 413         #undef CHECK_BOUNDARIES
 414
 415         // Find the level of each parameter
 416         #define FIND_LEVEL(param)                                                                       \
 417         param##_level = 0;                                                                                      \
 418         while (param##_level < nb_thresholds - 1)                                       \
 419         {                                                                                                                       \
 420                 if (format->param <= thresholds[param##_level].param)   \
 421                         break;                                                                                          \
 422                                                                                                                                 \
 423                 param##_level++;                                                                                \
 424         }
 425         FIND_LEVEL(speed);
 426         FIND_LEVEL(width);
 427         FIND_LEVEL(channels);
 428         #undef FIND_LEVEL
 429
 430         // Decrease the parameter with the highest level to the previous level
 431         if (channels_level >= speed_level && channels_level >= width_level && !fixed_channels)
 432         {
 433                 format->channels = thresholds[channels_level - 1].channels;
 434                 return true;
 435         }
 436         if (speed_level >= width_level && !fixed_speed)
 437         {
 438                 format->speed = thresholds[speed_level - 1].speed;
 439                 return true;
 440         }
 441
 442         format->width = thresholds[width_level - 1].width;
 443         return true;
 444 }
 445
 446
 447 #define SWAP_LISTENERS(l1, l2, tmpl) { tmpl = (l1); (l1) = (l2); (l2) = tmpl; }
 448
 449 static void S_SetChannelLayout (void)
 450 {
 451         unsigned int i;
 452         listener_t swaplistener;
 453         listener_t *listeners;
 454         int layout;
 455
 456         for (i = 0; i < SND_SPEAKERLAYOUTS; i++)
 457                 if (snd_speakerlayouts[i].channels == snd_renderbuffer->format.channels)
 458                         break;
 459         if (i >= SND_SPEAKERLAYOUTS)
 460         {
 461                 Con_Printf("S_SetChannelLayout: can't find the speaker layout for %hu channels. Defaulting to mono output\n",
 462                                    snd_renderbuffer->format.channels);
 463                 i = SND_SPEAKERLAYOUTS - 1;
 464         }
 465
 466         snd_speakerlayout = snd_speakerlayouts[i];
 467         listeners = snd_speakerlayout.listeners;
 468
 469         // Swap the left and right channels if snd_swapstereo is set
 470         if (boolxor(snd_swapstereo.integer, v_flipped.integer))
 471         {
 472                 switch (snd_speakerlayout.channels)
 473                 {
 474                         case 8:
 475                                 SWAP_LISTENERS(listeners[6], listeners[7], swaplistener);
 476                                 // no break
 477                         case 4:
 478                         case 6:
 479                                 SWAP_LISTENERS(listeners[2], listeners[3], swaplistener);
 480                                 // no break
 481                         case 2:
 482                                 SWAP_LISTENERS(listeners[0], listeners[1], swaplistener);
 483                                 break;
 484
 485                         default:
 486                         case 1:
 487                                 // Nothing to do
 488                                 break;
 489                 }
 490         }
 491
 492         // Sanity check
 493         if (snd_channellayout.integer < SND_CHANNELLAYOUT_AUTO ||
 494                 snd_channellayout.integer > SND_CHANNELLAYOUT_ALSA)
 495                 Cvar_SetValueQuick (&snd_channellayout, SND_CHANNELLAYOUT_STANDARD);
 496
 497         if (snd_channellayout.integer == SND_CHANNELLAYOUT_AUTO)
 498         {
 499                 // If we're in the sound engine initialization
 500                 if (current_channellayout_used == SND_CHANNELLAYOUT_AUTO)
 501                 {
 502                         layout = SND_CHANNELLAYOUT_STANDARD;
 503                         Cvar_SetValueQuick (&snd_channellayout, layout);
 504                 }
 505                 else
 506                         layout = current_channellayout_used;
 507         }
 508         else
 509                 layout = snd_channellayout.integer;
 510
 511         // Convert our layout (= ALSA) to the standard layout if necessary
 512         if (snd_speakerlayout.channels == 6 || snd_speakerlayout.channels == 8)
 513         {
 514                 if (layout == SND_CHANNELLAYOUT_STANDARD)
 515                 {
 516                         SWAP_LISTENERS(listeners[2], listeners[4], swaplistener);
 517                         SWAP_LISTENERS(listeners[3], listeners[5], swaplistener);
 518                 }
 519
 520                 Con_Printf("S_SetChannelLayout: using %s speaker layout for 3D sound\n",
 521                                    (layout == SND_CHANNELLAYOUT_ALSA) ? "ALSA" : "standard");
 522         }
 523
 524         current_swapstereo = boolxor(snd_swapstereo.integer, v_flipped.integer);
 525         current_channellayout = snd_channellayout.integer;
 526         current_channellayout_used = layout;
 527 }
 528
 529
 530 void S_Startup (void)
 531 {
 532         qboolean fixed_speed, fixed_width, fixed_channels;
 533         snd_format_t chosen_fmt;
 534         static snd_format_t prev_render_format = {0, 0, 0};
 535         char* env;
 536 #if _MSC_VER >= 1400
 537         size_t envlen;
 538 #endif
 539         int i;
 540
 541         if (!snd_initialized.integer)
 542                 return;
 543
 544         fixed_speed = false;
 545         fixed_width = false;
 546         fixed_channels = false;
 547
 548         // Get the starting sound format from the cvars
 549         chosen_fmt.speed = snd_speed.integer;
 550         chosen_fmt.width = snd_width.integer;
 551         chosen_fmt.channels = snd_channels.integer;
 552
 553         // Check the environment variables to see if the player wants a particular sound format
 554 #if _MSC_VER >= 1400
 555         _dupenv_s(&env, &envlen, "QUAKE_SOUND_CHANNELS");
 556 #else
 557         env = getenv("QUAKE_SOUND_CHANNELS");
 558 #endif
 559         if (env != NULL)
 560         {
 561                 chosen_fmt.channels = atoi (env);
 562 #if _MSC_VER >= 1400
 563                 free(env);
 564 #endif
 565                 fixed_channels = true;
 566         }
 567 #if _MSC_VER >= 1400
 568         _dupenv_s(&env, &envlen, "QUAKE_SOUND_SPEED");
 569 #else
 570         env = getenv("QUAKE_SOUND_SPEED");
 571 #endif
 572         if (env != NULL)
 573         {
 574                 chosen_fmt.speed = atoi (env);
 575 #if _MSC_VER >= 1400
 576                 free(env);
 577 #endif
 578                 fixed_speed = true;
 579         }
 580 #if _MSC_VER >= 1400
 581         _dupenv_s(&env, &envlen, "QUAKE_SOUND_SAMPLEBITS");
 582 #else
 583         env = getenv("QUAKE_SOUND_SAMPLEBITS");
 584 #endif
 585         if (env != NULL)
 586         {
 587                 chosen_fmt.width = atoi (env) / 8;
 588 #if _MSC_VER >= 1400
 589                 free(env);
 590 #endif
 591                 fixed_width = true;
 592         }
 593
 594         // Parse the command line to see if the player wants a particular sound format
 595 // COMMANDLINEOPTION: Sound: -sndquad sets sound output to 4 channel surround
 596         if (COM_CheckParm ("-sndquad") != 0)
 597         {
 598                 chosen_fmt.channels = 4;
 599                 fixed_channels = true;
 600         }
 601 // COMMANDLINEOPTION: Sound: -sndstereo sets sound output to stereo
 602         else if (COM_CheckParm ("-sndstereo") != 0)
 603         {
 604                 chosen_fmt.channels = 2;
 605                 fixed_channels = true;
 606         }
 607 // COMMANDLINEOPTION: Sound: -sndmono sets sound output to mono
 608         else if (COM_CheckParm ("-sndmono") != 0)
 609         {
 610                 chosen_fmt.channels = 1;
 611                 fixed_channels = true;
 612         }
 613 // COMMANDLINEOPTION: Sound: -sndspeed <hz> chooses sound output rate (supported values are 48000, 44100, 32000, 24000, 22050, 16000, 11025 (quake), 8000)
 614         i = COM_CheckParm ("-sndspeed");
 615         if (0 < i && i < com_argc - 1)
 616         {
 617                 chosen_fmt.speed = atoi (com_argv[i + 1]);
 618                 fixed_speed = true;
 619         }
 620 // COMMANDLINEOPTION: Sound: -sndbits <bits> chooses 8 bit or 16 bit sound output
 621         i = COM_CheckParm ("-sndbits");
 622         if (0 < i && i < com_argc - 1)
 623         {
 624                 chosen_fmt.width = atoi (com_argv[i + 1]) / 8;
 625                 fixed_width = true;
 626         }
 627
 628 #if 0
 629         // LordHavoc: now you can with the resampler...
 630         // You can't change sound speed after start time (not yet supported)
 631         if (prev_render_format.speed != 0)
 632         {
 633                 fixed_speed = true;
 634                 if (chosen_fmt.speed != prev_render_format.speed)
 635                 {
 636                         Con_Printf("S_Startup: sound speed has changed! This is NOT supported yet. Falling back to previous speed (%u Hz)\n",
 637                                            prev_render_format.speed);
 638                         chosen_fmt.speed = prev_render_format.speed;
 639                 }
 640         }
 641 #endif
 642
 643         // Sanity checks
 644         if (chosen_fmt.speed < SND_MIN_SPEED)
 645         {
 646                 chosen_fmt.speed = SND_MIN_SPEED;
 647                 fixed_speed = false;
 648         }
 649         else if (chosen_fmt.speed > SND_MAX_SPEED)
 650         {
 651                 chosen_fmt.speed = SND_MAX_SPEED;
 652                 fixed_speed = false;
 653         }
 654
 655         if (chosen_fmt.width < SND_MIN_WIDTH)
 656         {
 657                 chosen_fmt.width = SND_MIN_WIDTH;
 658                 fixed_width = false;
 659         }
 660         else if (chosen_fmt.width > SND_MAX_WIDTH)
 661         {
 662                 chosen_fmt.width = SND_MAX_WIDTH;
 663                 fixed_width = false;
 664         }
 665
 666         if (chosen_fmt.channels < SND_MIN_CHANNELS)
 667         {
 668                 chosen_fmt.channels = SND_MIN_CHANNELS;
 669                 fixed_channels = false;
 670         }
 671         else if (chosen_fmt.channels > SND_MAX_CHANNELS)
 672         {
 673                 chosen_fmt.channels = SND_MAX_CHANNELS;
 674                 fixed_channels = false;
 675         }
 676
 677         // create the sound buffer used for sumitting the samples to the plaform-dependent module
 678         if (!simsound)
 679         {
 680                 snd_format_t suggest_fmt;
 681                 qboolean accepted;
 682
 683                 accepted = false;
 684                 do
 685                 {
 686                         Con_Printf("S_Startup: initializing sound output format: %dHz, %d bit, %d channels...\n",
 687                                                 chosen_fmt.speed, chosen_fmt.width * 8,
 688                                                 chosen_fmt.channels);
 689
 690                         memset(&suggest_fmt, 0, sizeof(suggest_fmt));
 691                         accepted = SndSys_Init(&chosen_fmt, &suggest_fmt);
 692
 693                         if (!accepted)
 694                         {
 695                                 Con_Printf("S_Startup: sound output initialization FAILED\n");
 696
 697                                 // If the module is suggesting another one
 698                                 if (suggest_fmt.speed != 0)
 699                                 {
 700                                         memcpy(&chosen_fmt, &suggest_fmt, sizeof(chosen_fmt));
 701                                         Con_Printf ("           Driver has suggested %dHz, %d bit, %d channels. Retrying...\n",
 702                                                                 suggest_fmt.speed, suggest_fmt.width * 8,
 703                                                                 suggest_fmt.channels);
 704                                 }
 705                                 // Else, try to find a less resource-demanding format
 706                                 else if (!S_ChooseCheaperFormat (&chosen_fmt, fixed_speed, fixed_width, fixed_channels))
 707                                         break;
 708                         }
 709                 } while (!accepted);
 710
 711                 // If we haven't found a suitable format
 712                 if (!accepted)
 713                 {
 714                         Con_Print("S_Startup: SndSys_Init failed.\n");
 715                         sound_spatialized = false;
 716                         return;
 717                 }
 718         }
 719         else
 720         {
 721                 snd_renderbuffer = Snd_CreateRingBuffer(&chosen_fmt, 0, NULL);
 722                 Con_Print ("S_Startup: simulating sound output\n");
 723         }
 724
 725         memcpy(&prev_render_format, &snd_renderbuffer->format, sizeof(prev_render_format));
 726         Con_Printf("Sound format: %dHz, %d channels, %d bits per sample\n",
 727                            chosen_fmt.speed, chosen_fmt.channels, chosen_fmt.width * 8);
 728
 729         // Update the cvars
 730         if (snd_speed.integer != (int)chosen_fmt.speed)
 731                 Cvar_SetValueQuick(&snd_speed, chosen_fmt.speed);
 732         if (snd_width.integer != chosen_fmt.width)
 733                 Cvar_SetValueQuick(&snd_width, chosen_fmt.width);
 734         if (snd_channels.integer != chosen_fmt.channels)
 735                 Cvar_SetValueQuick(&snd_channels, chosen_fmt.channels);
 736
 737         current_channellayout_used = SND_CHANNELLAYOUT_AUTO;
 738         S_SetChannelLayout();
 739
 740         snd_starttime = realtime;
 741
 742         // If the sound module has already run, add an extra time to make sure
 743         // the sound time doesn't decrease, to not confuse playing SFXs
 744         if (oldpaintedtime != 0)
 745         {
 746                 // The extra time must be a multiple of the render buffer size
 747                 // to avoid modifying the current position in the buffer,
 748                 // some modules write directly to a shared (DMA) buffer
 749                 extrasoundtime = oldpaintedtime + snd_renderbuffer->maxframes - 1;
 750                 extrasoundtime -= extrasoundtime % snd_renderbuffer->maxframes;
 751                 Con_Printf("S_Startup: extra sound time = %u\n", extrasoundtime);
 752
 753                 soundtime = extrasoundtime;
 754         }
 755         else
 756                 extrasoundtime = 0;
 757         snd_renderbuffer->startframe = soundtime;
 758         snd_renderbuffer->endframe = soundtime;
 759         recording_sound = false;
 760 }
 761
 762 void S_Shutdown(void)
 763 {
 764         if (snd_renderbuffer == NULL)
 765                 return;
 766
 767         oldpaintedtime = snd_renderbuffer->endframe;
 768
 769         if (simsound)
 770         {
 771                 Mem_Free(snd_renderbuffer->ring);
 772                 Mem_Free(snd_renderbuffer);
 773                 snd_renderbuffer = NULL;
 774         }
 775         else
 776                 SndSys_Shutdown();
 777
 778         sound_spatialized = false;
 779 }
 780
 781 static void S_Restart_f(void)
 782 {
 783         // NOTE: we can't free all sounds if we are running a map (this frees sfx_t that are still referenced by precaches)
 784         // So, refuse to do this if we are connected.
 785         if(cls.state == ca_connected)
 786         {
 787                 Con_Printf("snd_restart would wreak havoc if you do that while connected!\n");
 788                 return;
 789         }
 790
 791         S_Shutdown();
 792         S_Startup();
 793 }
 794
 795 /*
 796 ================
 797 S_Init
 798 ================
 799 */
 800 void S_Init(void)
 801 {
 802         Cvar_RegisterVariable(&volume);
 803         Cvar_RegisterVariable(&bgmvolume);
 804         Cvar_RegisterVariable(&mastervolume);
 805         Cvar_RegisterVariable(&snd_staticvolume);
 806         Cvar_RegisterVariable(&snd_entchannel0volume);
 807         Cvar_RegisterVariable(&snd_entchannel1volume);
 808         Cvar_RegisterVariable(&snd_entchannel2volume);
 809         Cvar_RegisterVariable(&snd_entchannel3volume);
 810         Cvar_RegisterVariable(&snd_entchannel4volume);
 811         Cvar_RegisterVariable(&snd_entchannel5volume);
 812         Cvar_RegisterVariable(&snd_entchannel6volume);
 813         Cvar_RegisterVariable(&snd_entchannel7volume);
 814         Cvar_RegisterVariable(&snd_worldchannel0volume);
 815         Cvar_RegisterVariable(&snd_worldchannel1volume);
 816         Cvar_RegisterVariable(&snd_worldchannel2volume);
 817         Cvar_RegisterVariable(&snd_worldchannel3volume);
 818         Cvar_RegisterVariable(&snd_worldchannel4volume);
 819         Cvar_RegisterVariable(&snd_worldchannel5volume);
 820         Cvar_RegisterVariable(&snd_worldchannel6volume);
 821         Cvar_RegisterVariable(&snd_worldchannel7volume);
 822         Cvar_RegisterVariable(&snd_playerchannel0volume);
 823         Cvar_RegisterVariable(&snd_playerchannel1volume);
 824         Cvar_RegisterVariable(&snd_playerchannel2volume);
 825         Cvar_RegisterVariable(&snd_playerchannel3volume);
 826         Cvar_RegisterVariable(&snd_playerchannel4volume);
 827         Cvar_RegisterVariable(&snd_playerchannel5volume);
 828         Cvar_RegisterVariable(&snd_playerchannel6volume);
 829         Cvar_RegisterVariable(&snd_playerchannel7volume);
 830         Cvar_RegisterVariable(&snd_csqcchannel0volume);
 831         Cvar_RegisterVariable(&snd_csqcchannel1volume);
 832         Cvar_RegisterVariable(&snd_csqcchannel2volume);
 833         Cvar_RegisterVariable(&snd_csqcchannel3volume);
 834         Cvar_RegisterVariable(&snd_csqcchannel4volume);
 835         Cvar_RegisterVariable(&snd_csqcchannel5volume);
 836         Cvar_RegisterVariable(&snd_csqcchannel6volume);
 837         Cvar_RegisterVariable(&snd_csqcchannel7volume);
 838         Cvar_RegisterVariable(&snd_channel0volume);
 839         Cvar_RegisterVariable(&snd_channel1volume);
 840         Cvar_RegisterVariable(&snd_channel2volume);
 841         Cvar_RegisterVariable(&snd_channel3volume);
 842         Cvar_RegisterVariable(&snd_channel4volume);
 843         Cvar_RegisterVariable(&snd_channel5volume);
 844         Cvar_RegisterVariable(&snd_channel6volume);
 845         Cvar_RegisterVariable(&snd_channel7volume);
 846
 847         Cvar_RegisterVariable(&snd_attenuation_exponent);
 848         Cvar_RegisterVariable(&snd_attenuation_decibel);
 849
 850         Cvar_RegisterVariable(&snd_spatialization_min_radius);
 851         Cvar_RegisterVariable(&snd_spatialization_max_radius);
 852         Cvar_RegisterVariable(&snd_spatialization_min);
 853         Cvar_RegisterVariable(&snd_spatialization_max);
 854         Cvar_RegisterVariable(&snd_spatialization_power);
 855         Cvar_RegisterVariable(&snd_spatialization_control);
 856         Cvar_RegisterVariable(&snd_spatialization_occlusion);
 857         Cvar_RegisterVariable(&snd_spatialization_prologic);
 858         Cvar_RegisterVariable(&snd_spatialization_prologic_frontangle);
 859
 860         Cvar_RegisterVariable(&snd_speed);
 861         Cvar_RegisterVariable(&snd_width);
 862         Cvar_RegisterVariable(&snd_channels);
 863         Cvar_RegisterVariable(&snd_mutewhenidle);
 864         Cvar_RegisterVariable(&snd_maxchannelvolume);
 865         Cvar_RegisterVariable(&snd_softclip);
 866
 867         Cvar_RegisterVariable(&snd_startloopingsounds);
 868         Cvar_RegisterVariable(&snd_startnonloopingsounds);
 869
 870         Cvar_RegisterVariable(&snd_identicalsoundrandomization_time);
 871         Cvar_RegisterVariable(&snd_identicalsoundrandomization_tics);
 872
 873 // COMMANDLINEOPTION: Sound: -nosound disables sound (including CD audio)
 874         if (COM_CheckParm("-nosound"))
 875         {
 876                 // dummy out Play and Play2 because mods stuffcmd that
 877                 Cmd_AddCommand("play", Host_NoOperation_f, "does nothing because -nosound was specified");
 878                 Cmd_AddCommand("play2", Host_NoOperation_f, "does nothing because -nosound was specified");
 879                 return;
 880         }
 881
 882         snd_mempool = Mem_AllocPool("sound", 0, NULL);
 883
 884 // COMMANDLINEOPTION: Sound: -simsound runs sound mixing but with no output
 885         if (COM_CheckParm("-simsound"))
 886                 simsound = true;
 887
 888         Cmd_AddCommand("play", S_Play_f, "play a sound at your current location (not heard by anyone else)");
 889         Cmd_AddCommand("play2", S_Play2_f, "play a sound globally throughout the level (not heard by anyone else)");
 890         Cmd_AddCommand("playvol", S_PlayVol_f, "play a sound at the specified volume level at your current location (not heard by anyone else)");
 891         Cmd_AddCommand("stopsound", S_StopAllSounds, "silence");
 892         Cmd_AddCommand("soundlist", S_SoundList_f, "list loaded sounds");
 893         Cmd_AddCommand("soundinfo", S_SoundInfo_f, "print sound system information (such as channels and speed)");
 894         Cmd_AddCommand("snd_restart", S_Restart_f, "restart sound system");
 895         Cmd_AddCommand("snd_unloadallsounds", S_UnloadAllSounds_f, "unload all sound files");
 896
 897         Cvar_RegisterVariable(&nosound);
 898         Cvar_RegisterVariable(&snd_precache);
 899         Cvar_RegisterVariable(&snd_initialized);
 900         Cvar_RegisterVariable(&snd_streaming);
 901         Cvar_RegisterVariable(&snd_streaming_length);
 902         Cvar_RegisterVariable(&ambient_level);
 903         Cvar_RegisterVariable(&ambient_fade);
 904         Cvar_RegisterVariable(&snd_noextraupdate);
 905         Cvar_RegisterVariable(&snd_show);
 906         Cvar_RegisterVariable(&_snd_mixahead);
 907         Cvar_RegisterVariable(&snd_swapstereo); // for people with backwards sound wiring
 908         Cvar_RegisterVariable(&snd_channellayout);
 909         Cvar_RegisterVariable(&snd_soundradius);
 910
 911         Cvar_SetValueQuick(&snd_initialized, true);
 912
 913         known_sfx = NULL;
 914
 915         total_channels = MAX_DYNAMIC_CHANNELS + NUM_AMBIENTS;   // no statics
 916         memset(channels, 0, MAX_CHANNELS * sizeof(channel_t));
 917
 918         OGG_OpenLibrary ();
 919 }
 920
 921
 922 /*
 923 ================
 924 S_Terminate
 925
 926 Shutdown and free all resources
 927 ================
 928 */
 929 void S_Terminate (void)
 930 {
 931         S_Shutdown ();
 932         OGG_CloseLibrary ();
 933
 934         // Free all SFXs
 935         while (known_sfx != NULL)
 936                 S_FreeSfx (known_sfx, true);
 937
 938         Cvar_SetValueQuick (&snd_initialized, false);
 939         Mem_FreePool (&snd_mempool);
 940 }
 941
 942
 943 /*
 944 ==================
 945 S_UnloadAllSounds_f
 946 ==================
 947 */
 948 void S_UnloadAllSounds_f (void)
 949 {
 950         int i;
 951
 952         // NOTE: we can't free all sounds if we are running a map (this frees sfx_t that are still referenced by precaches)
 953         // So, refuse to do this if we are connected.
 954         if(cls.state == ca_connected)
 955         {
 956                 Con_Printf("snd_unloadallsounds would wreak havoc if you do that while connected!\n");
 957                 return;
 958         }
 959
 960         // stop any active sounds
 961         S_StopAllSounds();
 962
 963         // because the ambient sounds will be freed, clear the pointers
 964         for (i = 0;i < (int)sizeof (ambient_sfxs) / (int)sizeof (ambient_sfxs[0]);i++)
 965                 ambient_sfxs[i] = NULL;
 966
 967         // now free all sounds
 968         while (known_sfx != NULL)
 969                 S_FreeSfx (known_sfx, true);
 970 }
 971
 972
 973 /*
 974 ==================
 975 S_FindName
 976 ==================
 977 */
 978 sfx_t changevolume_sfx = {""};
 979 sfx_t *S_FindName (const char *name)
 980 {
 981         sfx_t *sfx;
 982
 983         if (!snd_initialized.integer)
 984                 return NULL;
 985
 986         if(!strcmp(name, changevolume_sfx.name))
 987                 return &changevolume_sfx;
 988
 989         if (strlen (name) >= sizeof (sfx->name))
 990         {
 991                 Con_Printf ("S_FindName: sound name too long (%s)\n", name);
 992                 return NULL;
 993         }
 994
 995         // Look for this sound in the list of known sfx
 996         // TODO: hash table search?
 997         for (sfx = known_sfx; sfx != NULL; sfx = sfx->next)
 998                 if(!strcmp (sfx->name, name))
 999                         return sfx;
1000
1001         // check for # in the beginning, try lookup by soundindex
1002         if (name[0] == '#' && name[1])
1003         {
1004                 int soundindex = atoi(name + 1);
1005                 if (soundindex > 0 && soundindex < MAX_SOUNDS)
1006                         if (cl.sound_precache[soundindex]->name[0])
1007                                 return cl.sound_precache[soundindex];
1008         }
1009
1010         // Add a sfx_t struct for this sound
1011         sfx = (sfx_t *)Mem_Alloc (snd_mempool, sizeof (*sfx));
1012         memset (sfx, 0, sizeof(*sfx));
1013         strlcpy (sfx->name, name, sizeof (sfx->name));
1014         sfx->memsize = sizeof(*sfx);
1015         sfx->next = known_sfx;
1016         known_sfx = sfx;
1017
1018         return sfx;
1019 }
1020
1021
1022 /*
1023 ==================
1024 S_FreeSfx
1025 ==================
1026 */
1027 void S_FreeSfx (sfx_t *sfx, qboolean force)
1028 {
1029         unsigned int i;
1030
1031         // Do not free a precached sound during purge
1032         if (!force && (sfx->flags & (SFXFLAG_LEVELSOUND | SFXFLAG_MENUSOUND)))
1033                 return;
1034
1035         if (developer_loading.integer)
1036                 Con_Printf ("unloading sound %s\n", sfx->name);
1037
1038         // Remove it from the list of known sfx
1039         if (sfx == known_sfx)
1040                 known_sfx = known_sfx->next;
1041         else
1042         {
1043                 sfx_t *prev_sfx;
1044
1045                 for (prev_sfx = known_sfx; prev_sfx != NULL; prev_sfx = prev_sfx->next)
1046                         if (prev_sfx->next == sfx)
1047                         {
1048                                 prev_sfx->next = sfx->next;
1049                                 break;
1050                         }
1051                 if (prev_sfx == NULL)
1052                 {
1053                         Con_Printf ("S_FreeSfx: Can't find SFX %s in the list!\n", sfx->name);
1054                         return;
1055                 }
1056         }
1057
1058         // Stop all channels using this sfx
1059         for (i = 0; i < total_channels; i++)
1060         {
1061                 if (channels[i].sfx == sfx)
1062                 {
1063                         Con_Printf("S_FreeSfx: stopping channel %i for sfx \"%s\"\n", i, sfx->name);
1064                         S_StopChannel (i, true, false);
1065                 }
1066         }
1067
1068         // Free it
1069         if (sfx->fetcher != NULL && sfx->fetcher->freesfx != NULL)
1070                 sfx->fetcher->freesfx(sfx);
1071         Mem_Free (sfx);
1072 }
1073
1074
1075 /*
1076 ==================
1077 S_ClearUsed
1078 ==================
1079 */
1080 void S_ClearUsed (void)
1081 {
1082         sfx_t *sfx;
1083 //      sfx_t *sfxnext;
1084         unsigned int i;
1085
1086         // Start the ambient sounds and make them loop
1087         for (i = 0; i < sizeof (ambient_sfxs) / sizeof (ambient_sfxs[0]); i++)
1088         {
1089                 // Precache it if it's not done (and pass false for levelsound because these are permanent)
1090                 if (ambient_sfxs[i] == NULL)
1091                         ambient_sfxs[i] = S_PrecacheSound (ambient_names[i], false, false);
1092                 if (ambient_sfxs[i] != NULL)
1093                 {
1094                         channels[i].sfx = ambient_sfxs[i];
1095                         channels[i].sfx->flags |= SFXFLAG_MENUSOUND;
1096                         channels[i].flags |= CHANNELFLAG_FORCELOOP;
1097                         channels[i].basevolume = 0.0f;
1098                         channels[i].basespeed = channels[i].mixspeed = 1.0f;
1099                 }
1100         }
1101
1102         // Clear SFXFLAG_LEVELSOUND flag so that sounds not precached this level will be purged
1103         for (sfx = known_sfx; sfx != NULL; sfx = sfx->next)
1104                 sfx->flags &= ~SFXFLAG_LEVELSOUND;
1105 }
1106
1107 /*
1108 ==================
1109 S_PurgeUnused
1110 ==================
1111 */
1112 void S_PurgeUnused(void)
1113 {
1114         sfx_t *sfx;
1115         sfx_t *sfxnext;
1116
1117         // Free all not-precached per-level sfx
1118         for (sfx = known_sfx;sfx;sfx = sfxnext)
1119         {
1120                 sfxnext = sfx->next;
1121                 if (!(sfx->flags & (SFXFLAG_LEVELSOUND | SFXFLAG_MENUSOUND)))
1122                         S_FreeSfx (sfx, false);
1123         }
1124 }
1125
1126
1127 /*
1128 ==================
1129 S_PrecacheSound
1130 ==================
1131 */
1132 sfx_t *S_PrecacheSound (const char *name, qboolean complain, qboolean levelsound)
1133 {
1134         sfx_t *sfx;
1135
1136         if (!snd_initialized.integer)
1137                 return NULL;
1138
1139         if (name == NULL || name[0] == 0)
1140                 return NULL;
1141
1142         sfx = S_FindName (name);
1143
1144         if (sfx == NULL)
1145                 return NULL;
1146
1147         // clear the FILEMISSING flag so that S_LoadSound will try again on a
1148         // previously missing file
1149         sfx->flags &= ~ SFXFLAG_FILEMISSING;
1150
1151         // set a flag to indicate this has been precached for this level or permanently
1152         if (levelsound)
1153                 sfx->flags |= SFXFLAG_LEVELSOUND;
1154         else
1155                 sfx->flags |= SFXFLAG_MENUSOUND;
1156
1157         if (!nosound.integer && snd_precache.integer)
1158                 S_LoadSound(sfx, complain);
1159
1160         return sfx;
1161 }
1162
1163 /*
1164 ==================
1165 S_SoundLength
1166 ==================
1167 */
1168
1169 float S_SoundLength(const char *name)
1170 {
1171         sfx_t *sfx;
1172
1173         if (!snd_initialized.integer)
1174                 return -1;
1175         if (name == NULL || name[0] == 0)
1176                 return -1;
1177
1178         sfx = S_FindName(name);
1179         if (sfx == NULL)
1180                 return -1;
1181         return sfx->total_length / (float) S_GetSoundRate();
1182 }
1183
1184 /*
1185 ==================
1186 S_IsSoundPrecached
1187 ==================
1188 */
1189 qboolean S_IsSoundPrecached (const sfx_t *sfx)
1190 {
1191         return (sfx != NULL && sfx->fetcher != NULL) || (sfx == &changevolume_sfx);
1192 }
1193
1194 /*
1195 ==================
1196 S_BlockSound
1197 ==================
1198 */
1199 void S_BlockSound (void)
1200 {
1201         snd_blocked++;
1202 }
1203
1204
1205 /*
1206 ==================
1207 S_UnblockSound
1208 ==================
1209 */
1210 void S_UnblockSound (void)
1211 {
1212         snd_blocked--;
1213 }
1214
1215
1216 /*
1217 =================
1218 SND_PickChannel
1219
1220 Picks a channel based on priorities, empty slots, number of channels
1221 =================
1222 */
1223 static channel_t *SND_PickChannel(int entnum, int entchannel)
1224 {
1225         int ch_idx;
1226         int first_to_die;
1227         int first_life_left, life_left;
1228         channel_t* ch;
1229         sfx_t *sfx; // use this instead of ch->sfx->, because that is volatile.
1230
1231 // Check for replacement sound, or find the best one to replace
1232         first_to_die = -1;
1233         first_life_left = 0x7fffffff;
1234
1235         // entity channels try to replace the existing sound on the channel
1236         // channels <= 0 are autochannels
1237         if (IS_CHAN_SINGLE(entchannel))
1238         {
1239                 for (ch_idx=NUM_AMBIENTS ; ch_idx < NUM_AMBIENTS + MAX_DYNAMIC_CHANNELS ; ch_idx++)
1240                 {
1241                         ch = &channels[ch_idx];
1242                         if (ch->entnum == entnum && ch->entchannel == entchannel)
1243                         {
1244                                 // always override sound from same entity
1245                                 S_StopChannel (ch_idx, true, false);
1246                                 return &channels[ch_idx];
1247                         }
1248                 }
1249         }
1250
1251         // there was no channel to override, so look for the first empty one
1252         for (ch_idx=NUM_AMBIENTS ; ch_idx < NUM_AMBIENTS + MAX_DYNAMIC_CHANNELS ; ch_idx++)
1253         {
1254                 ch = &channels[ch_idx];
1255                 sfx = ch->sfx; // fetch the volatile variable
1256                 if (!sfx)
1257                 {
1258                         // no sound on this channel
1259                         first_to_die = ch_idx;
1260                         goto emptychan_found;
1261                 }
1262
1263                 // don't let monster sounds override player sounds
1264                 if ((ch->entnum == cl.viewentity || ch->entnum == CL_VM_GetViewEntity()) && !(entnum == cl.viewentity || entnum == CL_VM_GetViewEntity()))
1265                         continue;
1266
1267                 // don't override looped sounds
1268                 if ((ch->flags & CHANNELFLAG_FORCELOOP) || sfx->loopstart < sfx->total_length)
1269                         continue;
1270                 life_left = (int)((double)sfx->total_length - ch->position);
1271
1272                 if (life_left < first_life_left)
1273                 {
1274                         first_life_left = life_left;
1275                         first_to_die = ch_idx;
1276                 }
1277         }
1278
1279         if (first_to_die == -1)
1280                 return NULL;
1281
1282         S_StopChannel (first_to_die, true, false);
1283
1284 emptychan_found:
1285         return &channels[first_to_die];
1286 }
1287
1288 /*
1289 =================
1290 SND_Spatialize
1291
1292 Spatializes a channel
1293 =================
1294 */
1295 extern cvar_t cl_gameplayfix_soundsmovewithentities;
1296 static void SND_Spatialize_WithSfx(channel_t *ch, qboolean isstatic, sfx_t *sfx)
1297 {
1298         int i;
1299         double f;
1300         float angle_side, angle_front, angle_factor, mixspeed;
1301         vec_t dist, mastervol, intensity;
1302         vec3_t source_vec;
1303         char vabuf[1024];
1304
1305         // update sound origin if we know about the entity
1306         if (ch->entnum > 0 && cls.state == ca_connected && cl_gameplayfix_soundsmovewithentities.integer)
1307         {
1308                 if (ch->entnum >= MAX_EDICTS)
1309                 {
1310                         //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]);
1311
1312                         if (ch->entnum > MAX_EDICTS)
1313                                 if (!CL_VM_GetEntitySoundOrigin(ch->entnum, ch->origin))
1314                                         ch->entnum = MAX_EDICTS; // entity was removed, disown sound
1315                 }
1316                 else if (cl.entities[ch->entnum].state_current.active)
1317                 {
1318                         dp_model_t *model;
1319                         //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]);
1320                         model = CL_GetModelByIndex(cl.entities[ch->entnum].state_current.modelindex);
1321                         if (model && model->soundfromcenter)
1322                                 VectorMAM(0.5f, cl.entities[ch->entnum].render.mins, 0.5f, cl.entities[ch->entnum].render.maxs, ch->origin);
1323                         else
1324                                 Matrix4x4_OriginFromMatrix(&cl.entities[ch->entnum].render.matrix, ch->origin);
1325                 }
1326                 else if (cl.csqc_server2csqcentitynumber[ch->entnum])
1327                 {
1328                         //Con_Printf("-- entnum %i (client %i) origin %f %f %f neworigin %f %f %f\n", ch->entnum, cl.csqc_server2csqcentitynumber[ch->entnum], ch->origin[0], ch->origin[1], ch->origin[2], cl.entities[ch->entnum].state_current.origin[0], cl.entities[ch->entnum].state_current.origin[1], cl.entities[ch->entnum].state_current.origin[2]);
1329
1330                         if (!CL_VM_GetEntitySoundOrigin(cl.csqc_server2csqcentitynumber[ch->entnum] + MAX_EDICTS, ch->origin))
1331                                 ch->entnum = MAX_EDICTS; // entity was removed, disown sound
1332                 }
1333         }
1334
1335         mastervol = ch->basevolume;
1336         mixspeed = ch->basespeed;
1337
1338         // TODO: implement doppler based on origin change relative to viewer and time of recent origin changes
1339
1340         // Adjust volume of static sounds
1341         if (isstatic)
1342                 mastervol *= snd_staticvolume.value;
1343         else if(!(ch->flags & CHANNELFLAG_FULLVOLUME)) // same as SND_PaintChannel uses
1344         {
1345                 // old legacy separated cvars
1346                 if(ch->entnum >= MAX_EDICTS)
1347                 {
1348                         switch(ch->entchannel)
1349                         {
1350                                 case 0: mastervol *= snd_csqcchannel0volume.value; break;
1351                                 case 1: mastervol *= snd_csqcchannel1volume.value; break;
1352                                 case 2: mastervol *= snd_csqcchannel2volume.value; break;
1353                                 case 3: mastervol *= snd_csqcchannel3volume.value; break;
1354                                 case 4: mastervol *= snd_csqcchannel4volume.value; break;
1355                                 case 5: mastervol *= snd_csqcchannel5volume.value; break;
1356                                 case 6: mastervol *= snd_csqcchannel6volume.value; break;
1357                                 case 7: mastervol *= snd_csqcchannel7volume.value; break;
1358                                 default:                                           break;
1359                         }
1360                 }
1361                 else if(ch->entnum == 0)
1362                 {
1363                         switch(ch->entchannel)
1364                         {
1365                                 case 0: mastervol *= snd_worldchannel0volume.value; break;
1366                                 case 1: mastervol *= snd_worldchannel1volume.value; break;
1367                                 case 2: mastervol *= snd_worldchannel2volume.value; break;
1368                                 case 3: mastervol *= snd_worldchannel3volume.value; break;
1369                                 case 4: mastervol *= snd_worldchannel4volume.value; break;
1370                                 case 5: mastervol *= snd_worldchannel5volume.value; break;
1371                                 case 6: mastervol *= snd_worldchannel6volume.value; break;
1372                                 case 7: mastervol *= snd_worldchannel7volume.value; break;
1373                                 default:                                            break;
1374                         }
1375                 }
1376                 else if(ch->entnum > 0 && ch->entnum <= cl.maxclients)
1377                 {
1378                         switch(ch->entchannel)
1379                         {
1380                                 case 0: mastervol *= snd_playerchannel0volume.value; break;
1381                                 case 1: mastervol *= snd_playerchannel1volume.value; break;
1382                                 case 2: mastervol *= snd_playerchannel2volume.value; break;
1383                                 case 3: mastervol *= snd_playerchannel3volume.value; break;
1384                                 case 4: mastervol *= snd_playerchannel4volume.value; break;
1385                                 case 5: mastervol *= snd_playerchannel5volume.value; break;
1386                                 case 6: mastervol *= snd_playerchannel6volume.value; break;
1387                                 case 7: mastervol *= snd_playerchannel7volume.value; break;
1388                                 default:                                             break;
1389                         }
1390                 }
1391                 else
1392                 {
1393                         switch(ch->entchannel)
1394                         {
1395                                 case 0: mastervol *= snd_entchannel0volume.value; break;
1396                                 case 1: mastervol *= snd_entchannel1volume.value; break;
1397                                 case 2: mastervol *= snd_entchannel2volume.value; break;
1398                                 case 3: mastervol *= snd_entchannel3volume.value; break;
1399                                 case 4: mastervol *= snd_entchannel4volume.value; break;
1400                                 case 5: mastervol *= snd_entchannel5volume.value; break;
1401                                 case 6: mastervol *= snd_entchannel6volume.value; break;
1402                                 case 7: mastervol *= snd_entchannel7volume.value; break;
1403                                 default:                                          break;
1404                         }
1405                 }
1406
1407                 switch(ch->entchannel)
1408                 {
1409                         case 0:  mastervol *= snd_channel0volume.value; break;
1410                         case 1:  mastervol *= snd_channel1volume.value; break;
1411                         case 2:  mastervol *= snd_channel2volume.value; break;
1412                         case 3:  mastervol *= snd_channel3volume.value; break;
1413                         case 4:  mastervol *= snd_channel4volume.value; break;
1414                         case 5:  mastervol *= snd_channel5volume.value; break;
1415                         case 6:  mastervol *= snd_channel6volume.value; break;
1416                         case 7:  mastervol *= snd_channel7volume.value; break;
1417                         default: mastervol *= Cvar_VariableValueOr(va(vabuf, sizeof(vabuf), "snd_channel%dvolume", CHAN_ENGINE2CVAR(ch->entchannel)), 1.0); break;
1418                 }
1419         }
1420
1421         // If this channel does not manage its own volume (like CD tracks)
1422         if (!(ch->flags & CHANNELFLAG_FULLVOLUME))
1423                 mastervol *= volume.value;
1424
1425         if(snd_maxchannelvolume.value > 0)
1426         {
1427                 // clamp HERE to allow to go at most 10dB past mastervolume (before clamping), when mastervolume < -10dB (so relative volumes don't get too messy)
1428                 mastervol = bound(0.0f, mastervol, 10.0f * snd_maxchannelvolume.value);
1429         }
1430
1431         // always apply "master"
1432         mastervol *= mastervolume.value;
1433
1434         // add in ReplayGain very late; prevent clipping when close
1435         if(sfx)
1436         if(sfx->volume_peak > 0)
1437         {
1438                 // Replaygain support
1439                 // Con_DPrintf("Setting volume on ReplayGain-enabled track... %f -> ", fvol);
1440                 mastervol *= sfx->volume_mult;
1441                 if(snd_maxchannelvolume.value > 0)
1442                 {
1443                         if(mastervol * sfx->volume_peak > snd_maxchannelvolume.value)
1444                                 mastervol = snd_maxchannelvolume.value / sfx->volume_peak;
1445                 }
1446                 // Con_DPrintf("%f\n", fvol);
1447         }
1448
1449         if(snd_maxchannelvolume.value > 0)
1450         {
1451                 // clamp HERE to keep relative volumes of the channels correct
1452                 mastervol = min(mastervol, snd_maxchannelvolume.value);
1453         }
1454
1455         mastervol = max(0.0f, mastervol);
1456
1457         ch->mixspeed = mixspeed;
1458
1459         // anything coming from the view entity will always be full volume
1460         // LordHavoc: make sounds with ATTN_NONE have no spatialization
1461         if (ch->entnum == cl.viewentity || ch->entnum == CL_VM_GetViewEntity() || ch->distfade == 0)
1462         {
1463                 ch->prologic_invert = 1;
1464                 if (snd_spatialization_prologic.integer != 0)
1465                 {
1466                         ch->volume[0] = mastervol * snd_speakerlayout.listeners[0].ambientvolume * sqrt(0.5);
1467                         ch->volume[1] = mastervol * snd_speakerlayout.listeners[1].ambientvolume * sqrt(0.5);
1468                         for (i = 2;i < SND_LISTENERS;i++)
1469                                 ch->volume[i] = 0;
1470                 }
1471                 else
1472                 {
1473                         for (i = 0;i < SND_LISTENERS;i++)
1474                                 ch->volume[i] = mastervol * snd_speakerlayout.listeners[i].ambientvolume;
1475                 }
1476         }
1477         else
1478         {
1479                 // calculate stereo seperation and distance attenuation
1480                 VectorSubtract(listener_origin, ch->origin, source_vec);
1481                 dist = VectorLength(source_vec);
1482                 f = dist * ch->distfade;
1483
1484                 f =
1485                         ((snd_attenuation_exponent.value == 0) ? 1.0 : pow(1.0 - min(1.0, f), (double)snd_attenuation_exponent.value))
1486                         *
1487                         ((snd_attenuation_decibel.value == 0) ? 1.0 : pow(0.1, 0.1 * snd_attenuation_decibel.value * f));
1488
1489                 intensity = mastervol * f;
1490                 if (intensity > 0)
1491                 {
1492                         qboolean occluded = false;
1493                         if (snd_spatialization_occlusion.integer)
1494                         {
1495                                 if(snd_spatialization_occlusion.integer & 1)
1496                                         if(listener_pvs && cl.worldmodel)
1497                                         {
1498                                                 int cluster = cl.worldmodel->brush.PointInLeaf(cl.worldmodel, ch->origin)->clusterindex;
1499                                                 if(cluster >= 0 && cluster < 8 * listener_pvsbytes && !CHECKPVSBIT(listener_pvs, cluster))
1500                                                         occluded = true;
1501                                         }
1502
1503                                 if(snd_spatialization_occlusion.integer & 2)
1504                                         if(!occluded)
1505                                                 if(cl.worldmodel && cl.worldmodel->brush.TraceLineOfSight && !cl.worldmodel->brush.TraceLineOfSight(cl.worldmodel, listener_origin, ch->origin, ch->origin, ch->origin))
1506                                                         occluded = true;
1507                         }
1508                         if(occluded)
1509                                 intensity *= 0.5f;
1510
1511                         ch->prologic_invert = 1;
1512                         if (snd_spatialization_prologic.integer != 0)
1513                         {
1514                                 if (dist == 0)
1515                                         angle_factor = 0.5f;
1516                                 else
1517                                 {
1518                                         Matrix4x4_Transform(&listener_basematrix, ch->origin, source_vec);
1519                                         VectorNormalize(source_vec);
1520
1521                                         switch(spatialmethod)
1522                                         {
1523                                                 case SPATIAL_LOG:
1524                                                         if(dist == 0)
1525                                                                 f = spatialmin + spatialdiff * (spatialfactor < 0); // avoid log(0), but do the right thing
1526                                                         else
1527                                                                 f = spatialmin + spatialdiff * bound(0, (log(dist) - spatialoffset) * spatialfactor, 1);
1528                                                         VectorScale(source_vec, f, source_vec);
1529                                                         break;
1530                                                 case SPATIAL_POW:
1531                                                         f = (pow(dist, spatialpower) - spatialoffset) * spatialfactor;
1532                                                         f = spatialmin + spatialdiff * bound(0, f, 1);
1533                                                         VectorScale(source_vec, f, source_vec);
1534                                                         break;
1535                                                 case SPATIAL_THRESH:
1536                                                         f = spatialmin + spatialdiff * (dist < spatialoffset);
1537                                                         VectorScale(source_vec, f, source_vec);
1538                                                         break;
1539                                                 case SPATIAL_NONE:
1540                                                 default:
1541                                                         break;
1542                                         }
1543
1544                                         // the z axis needs to be removed and normalized because otherwise the volume would get lower as the sound source goes higher or lower then normal
1545                                         source_vec[2] = 0;
1546                                         VectorNormalize(source_vec);
1547                                         angle_side = acos(source_vec[0]) / M_PI * 180;  // angle between 0 and 180 degrees
1548                                         angle_front = asin(source_vec[1]) / M_PI * 180; // angle between -90 and 90 degrees
1549                                         if (angle_side > snd_spatialization_prologic_frontangle.value)
1550                                         {
1551                                                 ch->prologic_invert = -1;       // this will cause the right channel to do a 180 degrees phase shift (turning the sound wave upside down),
1552                                                                                                         // but the best would be 90 degrees phase shift left and a -90 degrees phase shift right.
1553                                                 angle_factor = (angle_side - snd_spatialization_prologic_frontangle.value) / (360 - 2 * snd_spatialization_prologic_frontangle.value);
1554                                                 // angle_factor is between 0 and 1 and represents the angle range from the front left, to all the surround speakers (amount may vary,
1555                                                 // 1 in prologic I 2 in prologic II and 3 or 4 in prologic IIx) to the front right speaker.
1556                                                 if (angle_front > 0)
1557                                                         angle_factor = 1 - angle_factor;
1558                                         }
1559                                         else
1560                                                 angle_factor = angle_front / snd_spatialization_prologic_frontangle.value / 2.0 + 0.5;
1561                                                 //angle_factor is between 0 and 1 and represents the angle range from the front left to the center to the front right speaker
1562                                 }
1563
1564                                 ch->volume[0] = intensity * sqrt(angle_factor);
1565                                 ch->volume[1] = intensity * sqrt(1 - angle_factor);
1566                                 for (i = 2;i < SND_LISTENERS;i++)
1567                                         ch->volume[i] = 0;
1568                         }
1569                         else
1570                         {
1571                                 for (i = 0;i < SND_LISTENERS;i++)
1572                                 {
1573                                         Matrix4x4_Transform(&listener_matrix[i], ch->origin, source_vec);
1574                                         VectorNormalize(source_vec);
1575
1576                                         switch(spatialmethod)
1577                                         {
1578                                                 case SPATIAL_LOG:
1579                                                         if(dist == 0)
1580                                                                 f = spatialmin + spatialdiff * (spatialfactor < 0); // avoid log(0), but do the right thing
1581                                                         else
1582                                                                 f = spatialmin + spatialdiff * bound(0, (log(dist) - spatialoffset) * spatialfactor, 1);
1583                                                         VectorScale(source_vec, f, source_vec);
1584                                                         break;
1585                                                 case SPATIAL_POW:
1586                                                         f = (pow(dist, spatialpower) - spatialoffset) * spatialfactor;
1587                                                         f = spatialmin + spatialdiff * bound(0, f, 1);
1588                                                         VectorScale(source_vec, f, source_vec);
1589                                                         break;
1590                                                 case SPATIAL_THRESH:
1591                                                         f = spatialmin + spatialdiff * (dist < spatialoffset);
1592                                                         VectorScale(source_vec, f, source_vec);
1593                                                         break;
1594                                                 case SPATIAL_NONE:
1595                                                 default:
1596                                                         break;
1597                                         }
1598
1599                                         ch->volume[i] = intensity * max(0, source_vec[0] * snd_speakerlayout.listeners[i].dotscale + snd_speakerlayout.listeners[i].dotbias);
1600                                 }
1601                         }
1602                 }
1603                 else
1604                         for (i = 0;i < SND_LISTENERS;i++)
1605                                 ch->volume[i] = 0;
1606         }
1607 }
1608 static void SND_Spatialize(channel_t *ch, qboolean isstatic)
1609 {
1610         sfx_t *sfx = ch->sfx;
1611         SND_Spatialize_WithSfx(ch, isstatic, sfx);
1612 }
1613
1614
1615 // =======================================================================
1616 // Start a sound effect
1617 // =======================================================================
1618
1619 static void S_PlaySfxOnChannel (sfx_t *sfx, channel_t *target_chan, unsigned int flags, vec3_t origin, float fvol, float attenuation, qboolean isstatic, int entnum, int entchannel, int startpos, float fspeed)
1620 {
1621         if (!sfx)
1622         {
1623                 Con_Printf("S_PlaySfxOnChannel called with NULL??\n");
1624                 return;
1625         }
1626
1627         if ((sfx->loopstart < sfx->total_length) || (flags & CHANNELFLAG_FORCELOOP))
1628         {
1629                 if(!snd_startloopingsounds.integer)
1630                         return;
1631         }
1632         else
1633         {
1634                 if(!snd_startnonloopingsounds.integer)
1635                         return;
1636         }
1637
1638         // Initialize the channel
1639         // a crash was reported on an in-use channel, so check here...
1640         if (target_chan->sfx)
1641         {
1642                 int channelindex = (int)(target_chan - channels);
1643                 Con_Printf("S_PlaySfxOnChannel(%s): channel %i already in use??  Clearing.\n", sfx->name, channelindex);
1644                 S_StopChannel (channelindex, true, false);
1645         }
1646         // We MUST set sfx LAST because otherwise we could crash a threaded mixer
1647         // (otherwise we'd have to call SndSys_LockRenderBuffer here)
1648         memset (target_chan, 0, sizeof (*target_chan));
1649         VectorCopy (origin, target_chan->origin);
1650         target_chan->flags = flags;
1651         target_chan->position = startpos; // start of the sound
1652         target_chan->entnum = entnum;
1653         target_chan->entchannel = entchannel;
1654
1655         // If it's a static sound
1656         if (isstatic)
1657         {
1658                 if (sfx->loopstart >= sfx->total_length && (cls.protocol == PROTOCOL_QUAKE || cls.protocol == PROTOCOL_QUAKEWORLD))
1659                         Con_DPrintf("Quake compatibility warning: Static sound \"%s\" is not looped\n", sfx->name);
1660                 target_chan->distfade = attenuation / (64.0f * snd_soundradius.value);
1661         }
1662         else
1663                 target_chan->distfade = attenuation / snd_soundradius.value;
1664
1665         // set the listener volumes
1666         S_SetChannelVolume(target_chan - channels, fvol);
1667         S_SetChannelSpeed(target_chan - channels, fspeed);
1668         SND_Spatialize_WithSfx (target_chan, isstatic, sfx);
1669
1670         // finally, set the sfx pointer, so the channel becomes valid for playback
1671         // and will be noticed by the mixer
1672         target_chan->sfx = sfx;
1673 }
1674
1675
1676 int S_StartSound_StartPosition_Flags (int entnum, int entchannel, sfx_t *sfx, vec3_t origin, float fvol, float attenuation, float startposition, int flags, float fspeed)
1677 {
1678         channel_t *target_chan, *check, *ch;
1679         int             ch_idx, startpos, i;
1680
1681         if (snd_renderbuffer == NULL || sfx == NULL || nosound.integer)
1682                 return -1;
1683
1684         if(sfx == &changevolume_sfx)
1685         {
1686                 if (!IS_CHAN_SINGLE(entchannel))
1687                         return -1;
1688                 for (ch_idx=NUM_AMBIENTS ; ch_idx < NUM_AMBIENTS + MAX_DYNAMIC_CHANNELS ; ch_idx++)
1689                 {
1690                         ch = &channels[ch_idx];
1691                         if (ch->entnum == entnum && ch->entchannel == entchannel)
1692                         {
1693                                 S_SetChannelVolume(ch_idx, fvol);
1694                                 S_SetChannelSpeed(ch_idx, fspeed);
1695                                 for(i = 1; i > 0 && (i <= flags || i <= (int) channels[ch_idx].flags); i <<= 1)
1696                                         if((flags ^ channels[ch_idx].flags) & i)
1697                                                 S_SetChannelFlag(ch_idx, i, (flags & i) != 0);
1698                                 ch->distfade = attenuation / snd_soundradius.value;
1699                                 SND_Spatialize(ch, false);
1700                                 return ch_idx;
1701                         }
1702                 }
1703                 return -1;
1704         }
1705
1706         if (sfx->fetcher == NULL)
1707                 return -1;
1708
1709         // Pick a channel to play on
1710         target_chan = SND_PickChannel(entnum, entchannel);
1711         if (!target_chan)
1712                 return -1;
1713
1714         // if an identical sound has also been started this frame, offset the pos
1715         // a bit to keep it from just making the first one louder
1716         check = &channels[NUM_AMBIENTS];
1717         startpos = (int)(startposition * sfx->format.speed);
1718         if (startpos == 0)
1719         {
1720                 for (ch_idx=NUM_AMBIENTS ; ch_idx < NUM_AMBIENTS + MAX_DYNAMIC_CHANNELS ; ch_idx++, check++)
1721                 {
1722                         if (check == target_chan)
1723                                 continue;
1724                         if (check->sfx == sfx && check->position == 0 && check->basespeed == fspeed)
1725                         {
1726                                 // calculate max offset
1727                                 float maxtime = snd_identicalsoundrandomization_time.value;
1728                                 float maxtics = snd_identicalsoundrandomization_tics.value;
1729                                 float maxticsdelta = ((cls.state == ca_connected) ? (maxtics * (cl.mtime[0] - cl.mtime[1])) : 0);
1730                                 float maxdelta = 0;
1731                                 if(maxticsdelta == 0 || fabs(maxticsdelta) > fabs(maxtime))
1732                                         maxdelta = maxtime;
1733                                 else
1734                                         maxdelta = fabs(maxticsdelta) * ((maxtime > 0) ? 1 : -1);
1735
1736                                 // use negative pos offset to delay this sound effect
1737                                 startpos = lhrandom(0, maxdelta * sfx->format.speed);
1738                                 break;
1739                         }
1740                 }
1741         }
1742
1743         S_PlaySfxOnChannel (sfx, target_chan, flags, origin, fvol, attenuation, false, entnum, entchannel, startpos, fspeed);
1744
1745         return (target_chan - channels);
1746 }
1747
1748 int S_StartSound (int entnum, int entchannel, sfx_t *sfx, vec3_t origin, float fvol, float attenuation)
1749 {
1750         return S_StartSound_StartPosition_Flags(entnum, entchannel, sfx, origin, fvol, attenuation, 0, CHANNELFLAG_NONE, 1.0f);
1751 }
1752
1753 void S_StopChannel (unsigned int channel_ind, qboolean lockmutex, qboolean freesfx)
1754 {
1755         channel_t *ch;
1756         sfx_t *sfx;
1757
1758         if (channel_ind >= total_channels)
1759                 return;
1760
1761         // we have to lock an audio mutex to prevent crashes if an audio mixer
1762         // thread is currently mixing this channel
1763         // the SndSys_LockRenderBuffer function uses such a mutex in
1764         // threaded sound backends
1765         if (lockmutex && !simsound)
1766                 SndSys_LockRenderBuffer();
1767
1768         ch = &channels[channel_ind];
1769         sfx = ch->sfx;
1770         if (sfx != NULL)
1771         {
1772                 if (sfx->fetcher != NULL && sfx->fetcher->stopchannel != NULL)
1773                         sfx->fetcher->stopchannel(ch);
1774                 ch->fetcher_data = NULL;
1775                 ch->sfx = NULL;
1776                 if (freesfx)
1777                         S_FreeSfx(sfx, true);
1778         }
1779         if (lockmutex && !simsound)
1780                 SndSys_UnlockRenderBuffer();
1781 }
1782
1783
1784 qboolean S_SetChannelFlag (unsigned int ch_ind, unsigned int flag, qboolean value)
1785 {
1786         if (ch_ind >= total_channels)
1787                 return false;
1788
1789         if (flag != CHANNELFLAG_FORCELOOP &&
1790                 flag != CHANNELFLAG_PAUSED &&
1791                 flag != CHANNELFLAG_FULLVOLUME &&
1792                 flag != CHANNELFLAG_LOCALSOUND)
1793                 return false;
1794
1795         if (value)
1796                 channels[ch_ind].flags |= flag;
1797         else
1798                 channels[ch_ind].flags &= ~flag;
1799
1800         return true;
1801 }
1802
1803 void S_StopSound(int entnum, int entchannel)
1804 {
1805         unsigned int i;
1806
1807         for (i = 0; i < MAX_DYNAMIC_CHANNELS; i++)
1808                 if (channels[i].entnum == entnum && channels[i].entchannel == entchannel)
1809                 {
1810                         S_StopChannel (i, true, false);
1811                         return;
1812                 }
1813 }
1814
1815 void S_StopAllSounds (void)
1816 {
1817         unsigned int i;
1818
1819         // TOCHECK: is this test necessary?
1820         if (snd_renderbuffer == NULL)
1821                 return;
1822
1823 #ifdef CONFIG_CD
1824         // stop CD audio because it may be using a faketrack
1825         CDAudio_Stop();
1826 #endif
1827
1828         if (simsound || SndSys_LockRenderBuffer ())
1829         {
1830                 int clear;
1831                 size_t memsize;
1832
1833                 for (i = 0; i < total_channels; i++)
1834                         if (channels[i].sfx)
1835                                 S_StopChannel (i, false, false);
1836
1837                 total_channels = MAX_DYNAMIC_CHANNELS + NUM_AMBIENTS;   // no statics
1838                 memset(channels, 0, MAX_CHANNELS * sizeof(channel_t));
1839
1840                 // Mute the contents of the submittion buffer
1841                 clear = (snd_renderbuffer->format.width == 1) ? 0x80 : 0;
1842                 memsize = snd_renderbuffer->maxframes * snd_renderbuffer->format.width * snd_renderbuffer->format.channels;
1843                 memset(snd_renderbuffer->ring, clear, memsize);
1844
1845                 if (!simsound)
1846                         SndSys_UnlockRenderBuffer ();
1847         }
1848 }
1849
1850 void S_PauseGameSounds (qboolean toggle)
1851 {
1852         unsigned int i;
1853
1854         for (i = 0; i < total_channels; i++)
1855         {
1856                 channel_t *ch;
1857
1858                 ch = &channels[i];
1859                 if (ch->sfx != NULL && ! (ch->flags & CHANNELFLAG_LOCALSOUND))
1860                         S_SetChannelFlag (i, CHANNELFLAG_PAUSED, toggle);
1861         }
1862 }
1863
1864 void S_SetChannelVolume(unsigned int ch_ind, float fvol)
1865 {
1866         channels[ch_ind].basevolume = fvol;
1867 }
1868
1869 void S_SetChannelSpeed(unsigned int ch_ind, float fspeed)
1870 {
1871         channels[ch_ind].basespeed = fspeed;
1872 }
1873
1874 float S_GetChannelPosition (unsigned int ch_ind)
1875 {
1876         // note: this is NOT accurate yet
1877         double s;
1878         channel_t *ch = &channels[ch_ind];
1879         sfx_t *sfx = ch->sfx;
1880         if (!sfx)
1881                 return -1;
1882
1883         s = ch->position / sfx->format.speed;
1884         /*
1885         if(!snd_usethreadedmixing)
1886                 s += _snd_mixahead.value;
1887         */
1888         return (float)s;
1889 }
1890
1891 float S_GetEntChannelPosition(int entnum, int entchannel)
1892 {
1893         channel_t *ch;
1894         unsigned int i;
1895
1896         for (i = 0; i < total_channels; i++)
1897         {
1898                 ch = &channels[i];
1899                 if (ch->entnum == entnum && ch->entchannel == entchannel)
1900                         return S_GetChannelPosition(i);
1901         }
1902         return -1; // no playing sound in this channel
1903 }
1904
1905 /*
1906 =================
1907 S_StaticSound
1908 =================
1909 */
1910 void S_StaticSound (sfx_t *sfx, vec3_t origin, float fvol, float attenuation)
1911 {
1912         channel_t       *target_chan;
1913
1914         if (snd_renderbuffer == NULL || sfx == NULL || nosound.integer)
1915                 return;
1916         if (!sfx->fetcher)
1917         {
1918                 Con_Printf ("S_StaticSound: \"%s\" hasn't been precached\n", sfx->name);
1919                 return;
1920         }
1921
1922         if (total_channels == MAX_CHANNELS)
1923         {
1924                 Con_Print("S_StaticSound: total_channels == MAX_CHANNELS\n");
1925                 return;
1926         }
1927
1928         target_chan = &channels[total_channels++];
1929         S_PlaySfxOnChannel (sfx, target_chan, CHANNELFLAG_FORCELOOP, origin, fvol, attenuation, true, 0, 0, 0, 1.0f);
1930 }
1931
1932
1933 /*
1934 ===================
1935 S_UpdateAmbientSounds
1936 ===================
1937 */
1938 static void S_UpdateAmbientSounds (void)
1939 {
1940         int                     i;
1941         float           vol;
1942         float           fade = (float)max(0.0, cl.time - cl.oldtime) * ambient_fade.value / 256.0f;
1943         int                     ambient_channel;
1944         channel_t       *chan;
1945         unsigned char           ambientlevels[NUM_AMBIENTS];
1946         sfx_t           *sfx;
1947
1948         memset(ambientlevels, 0, sizeof(ambientlevels));
1949         if (cl.worldmodel && cl.worldmodel->brush.AmbientSoundLevelsForPoint)
1950                 cl.worldmodel->brush.AmbientSoundLevelsForPoint(cl.worldmodel, listener_origin, ambientlevels, sizeof(ambientlevels));
1951
1952         // Calc ambient sound levels
1953         for (ambient_channel = 0 ; ambient_channel< NUM_AMBIENTS ; ambient_channel++)
1954         {
1955                 chan = &channels[ambient_channel];
1956                 sfx = chan->sfx; // fetch the volatile variable
1957                 if (sfx == NULL || sfx->fetcher == NULL)
1958                         continue;
1959
1960                 i = ambientlevels[ambient_channel];
1961                 if (i < 8)
1962                         i = 0;
1963                 vol = i * (1.0f / 256.0f);
1964
1965                 // Don't adjust volume too fast
1966                 if (chan->basevolume < vol)
1967                 {
1968                         chan->basevolume += fade;
1969                         if (chan->basevolume > vol)
1970                                 chan->basevolume = vol;
1971                 }
1972                 else if (chan->basevolume > vol)
1973                 {
1974                         chan->basevolume -= fade;
1975                         if (chan->basevolume < vol)
1976                                 chan->basevolume = vol;
1977                 }
1978
1979                 if (snd_spatialization_prologic.integer != 0)
1980                 {
1981                         chan->volume[0] = chan->basevolume * ambient_level.value * volume.value * mastervolume.value * snd_speakerlayout.listeners[0].ambientvolume * sqrt(0.5);
1982                         chan->volume[1] = chan->basevolume * ambient_level.value * volume.value * mastervolume.value * snd_speakerlayout.listeners[1].ambientvolume * sqrt(0.5);
1983                         for (i = 2;i < SND_LISTENERS;i++)
1984                                 chan->volume[i] = 0.0f;
1985                 }
1986                 else
1987                 {
1988                         for (i = 0;i < SND_LISTENERS;i++)
1989                                 chan->volume[i] = chan->basevolume * ambient_level.value * volume.value * mastervolume.value * snd_speakerlayout.listeners[i].ambientvolume;
1990                 }
1991         }
1992 }
1993
1994 static void S_PaintAndSubmit (void)
1995 {
1996         unsigned int newsoundtime, paintedtime, endtime, maxtime, usedframes;
1997         int usesoundtimehack;
1998         static int soundtimehack = -1;
1999         static int oldsoundtime = 0;
2000
2001         if (snd_renderbuffer == NULL || nosound.integer)
2002                 return;
2003
2004         // Update sound time
2005         snd_usethreadedmixing = false;
2006         usesoundtimehack = true;
2007         if (cls.timedemo) // SUPER NASTY HACK to mix non-realtime sound for more reliable benchmarking
2008         {
2009                 usesoundtimehack = 1;
2010                 newsoundtime = (unsigned int)((double)cl.mtime[0] * (double)snd_renderbuffer->format.speed);
2011         }
2012         else if (cls.capturevideo.soundrate && !cls.capturevideo.realtime) // SUPER NASTY HACK to record non-realtime sound
2013         {
2014                 usesoundtimehack = 2;
2015                 newsoundtime = (unsigned int)((double)cls.capturevideo.frame * (double)snd_renderbuffer->format.speed / (double)cls.capturevideo.framerate);
2016         }
2017         else if (simsound)
2018         {
2019                 usesoundtimehack = 3;
2020                 newsoundtime = (unsigned int)((realtime - snd_starttime) * (double)snd_renderbuffer->format.speed);
2021         }
2022         else
2023         {
2024                 snd_usethreadedmixing = snd_threaded && !cls.capturevideo.soundrate;
2025                 usesoundtimehack = 0;
2026                 newsoundtime = SndSys_GetSoundTime();
2027         }
2028         // if the soundtimehack state changes we need to reset the soundtime
2029         if (soundtimehack != usesoundtimehack)
2030         {
2031                 snd_renderbuffer->startframe = snd_renderbuffer->endframe = soundtime = newsoundtime;
2032
2033                 // Mute the contents of the submission buffer
2034                 if (simsound || SndSys_LockRenderBuffer ())
2035                 {
2036                         int clear;
2037                         size_t memsize;
2038
2039                         clear = (snd_renderbuffer->format.width == 1) ? 0x80 : 0;
2040                         memsize = snd_renderbuffer->maxframes * snd_renderbuffer->format.width * snd_renderbuffer->format.channels;
2041                         memset(snd_renderbuffer->ring, clear, memsize);
2042
2043                         if (!simsound)
2044                                 SndSys_UnlockRenderBuffer ();
2045                 }
2046         }
2047         soundtimehack = usesoundtimehack;
2048
2049         if (!soundtimehack && snd_blocked > 0)
2050                 return;
2051
2052         if (snd_usethreadedmixing)
2053                 return; // the audio thread will mix its own data
2054
2055         newsoundtime += extrasoundtime;
2056         if (newsoundtime < soundtime)
2057         {
2058                 if ((cls.capturevideo.soundrate != 0) != recording_sound)
2059                 {
2060                         unsigned int additionaltime;
2061
2062                         // add some time to extrasoundtime make newsoundtime higher
2063
2064                         // The extra time must be a multiple of the render buffer size
2065                         // to avoid modifying the current position in the buffer,
2066                         // some modules write directly to a shared (DMA) buffer
2067                         additionaltime = (soundtime - newsoundtime) + snd_renderbuffer->maxframes - 1;
2068                         additionaltime -= additionaltime % snd_renderbuffer->maxframes;
2069
2070                         extrasoundtime += additionaltime;
2071                         newsoundtime += additionaltime;
2072                         Con_DPrintf("S_PaintAndSubmit: new extra sound time = %u\n",
2073                                                 extrasoundtime);
2074                 }
2075                 else if (!soundtimehack)
2076                         Con_Printf("S_PaintAndSubmit: WARNING: newsoundtime < soundtime (%u < %u)\n",
2077                                            newsoundtime, soundtime);
2078         }
2079         soundtime = newsoundtime;
2080         recording_sound = (cls.capturevideo.soundrate != 0);
2081
2082         // Lock submitbuffer
2083         if (!simsound && !SndSys_LockRenderBuffer())
2084         {
2085                 // If the lock failed, stop here
2086                 Con_DPrint(">> S_PaintAndSubmit: SndSys_LockRenderBuffer() failed\n");
2087                 return;
2088         }
2089
2090         // Check to make sure that we haven't overshot
2091         paintedtime = snd_renderbuffer->endframe;
2092         if (paintedtime < soundtime)
2093                 paintedtime = soundtime;
2094
2095         // mix ahead of current position
2096         if (soundtimehack)
2097                 endtime = soundtime + (unsigned int)(_snd_mixahead.value * (float)snd_renderbuffer->format.speed);
2098         else
2099                 endtime = soundtime + (unsigned int)(max(_snd_mixahead.value * (float)snd_renderbuffer->format.speed, min(3 * (soundtime - oldsoundtime), 0.3 * (float)snd_renderbuffer->format.speed)));
2100         usedframes = snd_renderbuffer->endframe - snd_renderbuffer->startframe;
2101         maxtime = paintedtime + snd_renderbuffer->maxframes - usedframes;
2102         endtime = min(endtime, maxtime);
2103
2104         while (paintedtime < endtime)
2105         {
2106                 unsigned int startoffset;
2107                 unsigned int nbframes;
2108
2109                 // see how much we can fit in the paint buffer
2110                 nbframes = endtime - paintedtime;
2111                 // limit to the end of the ring buffer (in case of wrapping)
2112                 startoffset = paintedtime % snd_renderbuffer->maxframes;
2113                 nbframes = min(nbframes, snd_renderbuffer->maxframes - startoffset);
2114
2115                 // mix into the buffer
2116                 S_MixToBuffer(&snd_renderbuffer->ring[startoffset * snd_renderbuffer->format.width * snd_renderbuffer->format.channels], nbframes);
2117
2118                 paintedtime += nbframes;
2119                 snd_renderbuffer->endframe = paintedtime;
2120         }
2121         if (!simsound)
2122                 SndSys_UnlockRenderBuffer();
2123
2124         // Remove outdated samples from the ring buffer, if any
2125         if (snd_renderbuffer->startframe < soundtime)
2126                 snd_renderbuffer->startframe = soundtime;
2127
2128         if (simsound)
2129                 snd_renderbuffer->startframe = snd_renderbuffer->endframe;
2130         else
2131                 SndSys_Submit();
2132
2133         oldsoundtime = soundtime;
2134
2135         cls.soundstats.latency_milliseconds = (snd_renderbuffer->endframe - snd_renderbuffer->startframe) * 1000 / snd_renderbuffer->format.speed;
2136         R_TimeReport("audiomix");
2137 }
2138
2139 /*
2140 ============
2141 S_Update
2142
2143 Called once each time through the main loop
2144 ============
2145 */
2146 void S_Update(const matrix4x4_t *listenermatrix)
2147 {
2148         unsigned int i, j, k;
2149         channel_t *ch, *combine;
2150         matrix4x4_t rotatematrix;
2151
2152         if (snd_renderbuffer == NULL || nosound.integer)
2153                 return;
2154
2155         {
2156                 double mindist_trans, maxdist_trans;
2157
2158                 spatialmin = snd_spatialization_min.value;
2159                 spatialdiff = snd_spatialization_max.value - spatialmin;
2160
2161                 if(snd_spatialization_control.value)
2162                 {
2163                         spatialpower = snd_spatialization_power.value;
2164
2165                         if(spatialpower == 0)
2166                         {
2167                                 spatialmethod = SPATIAL_LOG;
2168                                 mindist_trans = log(max(1, snd_spatialization_min_radius.value));
2169                                 maxdist_trans = log(max(1, snd_spatialization_max_radius.value));
2170                         }
2171                         else
2172                         {
2173                                 spatialmethod = SPATIAL_POW;
2174                                 mindist_trans = pow(snd_spatialization_min_radius.value, spatialpower);
2175                                 maxdist_trans = pow(snd_spatialization_max_radius.value, spatialpower);
2176                         }
2177
2178                         if(mindist_trans - maxdist_trans == 0)
2179                         {
2180                                 spatialmethod = SPATIAL_THRESH;
2181                                 mindist_trans = snd_spatialization_min_radius.value;
2182                         }
2183                         else
2184                         {
2185                                 spatialoffset = mindist_trans;
2186                                 spatialfactor = 1 / (maxdist_trans - mindist_trans);
2187                         }
2188                 }
2189                 else
2190                         spatialmethod = SPATIAL_NONE;
2191
2192         }
2193
2194         // If snd_swapstereo or snd_channellayout has changed, recompute the channel layout
2195         if (current_swapstereo != boolxor(snd_swapstereo.integer, v_flipped.integer) ||
2196                 current_channellayout != snd_channellayout.integer)
2197                 S_SetChannelLayout();
2198
2199         Matrix4x4_Invert_Simple(&listener_basematrix, listenermatrix);
2200         Matrix4x4_OriginFromMatrix(listenermatrix, listener_origin);
2201         if (cl.worldmodel && cl.worldmodel->brush.FatPVS && cl.worldmodel->brush.num_pvsclusterbytes && cl.worldmodel->brush.PointInLeaf)
2202         {
2203                 if(cl.worldmodel->brush.num_pvsclusterbytes != listener_pvsbytes)
2204                 {
2205                         if(listener_pvs)
2206                                 Mem_Free(listener_pvs);
2207                         listener_pvsbytes = cl.worldmodel->brush.num_pvsclusterbytes;
2208                         listener_pvs = (unsigned char *) Mem_Alloc(snd_mempool, listener_pvsbytes);
2209                 }
2210                 cl.worldmodel->brush.FatPVS(cl.worldmodel, listener_origin, 2, listener_pvs, listener_pvsbytes, 0);
2211         }
2212         else
2213         {
2214                 if(listener_pvs)
2215                 {
2216                         Mem_Free(listener_pvs);
2217                         listener_pvs = NULL;
2218                 }
2219                 listener_pvsbytes = 0;
2220         }
2221
2222         // calculate the current matrices
2223         for (j = 0;j < SND_LISTENERS;j++)
2224         {
2225                 Matrix4x4_CreateFromQuakeEntity(&rotatematrix, 0, 0, 0, 0, -snd_speakerlayout.listeners[j].yawangle, 0, 1);
2226                 Matrix4x4_Concat(&listener_matrix[j], &rotatematrix, &listener_basematrix);
2227                 // I think this should now do this:
2228                 //   1. create a rotation matrix for rotating by e.g. -90 degrees CCW
2229                 //      (note: the matrix will rotate the OBJECT, not the VIEWER, so its
2230                 //       angle has to be taken negative)
2231                 //   2. create a transform which first rotates and moves its argument
2232                 //      into the player's view coordinates (using basematrix which is
2233                 //      an inverted "absolute" listener matrix), then applies the
2234                 //      rotation matrix for the ear
2235                 // Isn't Matrix4x4_CreateFromQuakeEntity a bit misleading because this
2236                 // does not actually refer to an entity?
2237         }
2238
2239         // update general area ambient sound sources
2240         S_UpdateAmbientSounds ();
2241
2242         combine = NULL;
2243         R_TimeReport("audioprep");
2244
2245         // update spatialization for static and dynamic sounds
2246         cls.soundstats.totalsounds = 0;
2247         cls.soundstats.mixedsounds = 0;
2248         ch = channels+NUM_AMBIENTS;
2249         for (i=NUM_AMBIENTS ; i<total_channels; i++, ch++)
2250         {
2251                 if (!ch->sfx)
2252                         continue;
2253                 cls.soundstats.totalsounds++;
2254
2255                 // respatialize channel
2256                 SND_Spatialize(ch, i >= MAX_DYNAMIC_CHANNELS + NUM_AMBIENTS);
2257
2258                 // try to combine static sounds with a previous channel of the same
2259                 // sound effect so we don't mix five torches every frame
2260                 if (i > MAX_DYNAMIC_CHANNELS + NUM_AMBIENTS)
2261                 {
2262                         // no need to merge silent channels
2263                         for (j = 0;j < SND_LISTENERS;j++)
2264                                 if (ch->volume[j])
2265                                         break;
2266                         if (j == SND_LISTENERS)
2267                                 continue;
2268                         // if the last combine chosen isn't suitable, find a new one
2269                         if (!(combine && combine != ch && combine->sfx == ch->sfx))
2270                         {
2271                                 // search for one
2272                                 combine = NULL;
2273                                 for (j = MAX_DYNAMIC_CHANNELS + NUM_AMBIENTS;j < i;j++)
2274                                 {
2275                                         if (channels[j].sfx == ch->sfx)
2276                                         {
2277                                                 combine = channels + j;
2278                                                 break;
2279                                         }
2280                                 }
2281                         }
2282                         if (combine && combine != ch && combine->sfx == ch->sfx)
2283                         {
2284                                 for (j = 0;j < SND_LISTENERS;j++)
2285                                 {
2286                                         combine->volume[j] += ch->volume[j];
2287                                         ch->volume[j] = 0;
2288                                 }
2289                         }
2290                 }
2291                 for (k = 0;k < SND_LISTENERS;k++)
2292                         if (ch->volume[k])
2293                                 break;
2294                 if (k < SND_LISTENERS)
2295                         cls.soundstats.mixedsounds++;
2296         }
2297         R_TimeReport("audiospatialize");
2298
2299         sound_spatialized = true;
2300
2301         // debugging output
2302         if (snd_show.integer)
2303                 Con_Printf("----(%u)----\n", cls.soundstats.mixedsounds);
2304
2305         S_PaintAndSubmit();
2306 }
2307
2308 void S_ExtraUpdate (void)
2309 {
2310         if (snd_noextraupdate.integer || !sound_spatialized)
2311                 return;
2312
2313         S_PaintAndSubmit();
2314 }
2315
2316 qboolean S_LocalSound (const char *sound)
2317 {
2318         sfx_t   *sfx;
2319         int             ch_ind;
2320
2321         if (!snd_initialized.integer || nosound.integer)
2322                 return true;
2323
2324         sfx = S_PrecacheSound (sound, true, false);
2325         if (!sfx)
2326         {
2327                 Con_Printf("S_LocalSound: can't precache %s\n", sound);
2328                 return false;
2329         }
2330
2331         // menu sounds must not be freed on level change
2332         sfx->flags |= SFXFLAG_MENUSOUND;
2333
2334         // fun fact: in Quake 1, this used -1 "replace any entity channel",
2335         // which we no longer support anyway
2336         // changed by Black in r4297 "Changed S_LocalSound to play multiple sounds at a time."
2337         ch_ind = S_StartSound (cl.viewentity, 0, sfx, vec3_origin, 1, 0);
2338         if (ch_ind < 0)
2339                 return false;
2340
2341         channels[ch_ind].flags |= CHANNELFLAG_LOCALSOUND;
2342         return true;
2343 }