arch/linux/alsadigi.c

   1 // ALSA digital audio support
   2
   3 #include <stdlib.h>
   4 #include <stdio.h>
   5 #include <string.h>
   6 #include <sys/asoundlib.h>
   7 #include <pthread.h>
   8
   9 #include "error.h"
  10 #include "mono.h"
  11 #include "fix.h"
  12 #include "vecmat.h"
  13 #include "gr.h" // needed for piggy.h
  14 #include "piggy.h"
  15 #include "digi.h"
  16 #include "sounds.h"
  17 #include "wall.h"
  18 #include "newdemo.h"
  19 #include "kconfig.h"
  20
  21 //edited 05/17/99 Matt Mueller - added ifndef NO_ASM
  22 //added on 980905 by adb to add inline fixmul for mixer on i386
  23 #ifndef NO_ASM
  24 #ifdef __i386__
  25 #define do_fixmul(x,y)                          \
  26 ({                                              \
  27         int _ax, _dx;                           \
  28         asm("imull %2\n\tshrdl %3,%1,%0"        \
  29             : "=a"(_ax), "=d"(_dx)              \
  30             : "rm"(y), "i"(16), "0"(x));        \
  31         _ax;                                    \
  32 })
  33 extern inline fix fixmul(fix x, fix y) { return do_fixmul(x,y); }
  34 #endif
  35 #endif
  36 //end edit by adb
  37 //end edit -MM
  38
  39 //changed on 980905 by adb to increase number of concurrent sounds
  40 #define MAX_SOUND_SLOTS 32
  41 //end changes by adb
  42 #define SOUND_BUFFER_SIZE 512
  43
  44 #define MIN_VOLUME 10
  45
  46 /* This table is used to add two sound values together and pin
  47  * the value to avoid overflow.  (used with permission from ARDI)
  48  * DPH: Taken from SDL/src/SDL_mixer.c.
  49  */
  50 static const ubyte mix8[] =
  51 {
  52   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  53   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  54   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  55   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  56   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  57   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  58   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  59   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  60   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  61   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  62   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  63   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x02, 0x03,
  64   0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E,
  65   0x0F, 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18, 0x19,
  66   0x1A, 0x1B, 0x1C, 0x1D, 0x1E, 0x1F, 0x20, 0x21, 0x22, 0x23, 0x24,
  67   0x25, 0x26, 0x27, 0x28, 0x29, 0x2A, 0x2B, 0x2C, 0x2D, 0x2E, 0x2F,
  68   0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39, 0x3A,
  69   0x3B, 0x3C, 0x3D, 0x3E, 0x3F, 0x40, 0x41, 0x42, 0x43, 0x44, 0x45,
  70   0x46, 0x47, 0x48, 0x49, 0x4A, 0x4B, 0x4C, 0x4D, 0x4E, 0x4F, 0x50,
  71   0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58, 0x59, 0x5A, 0x5B,
  72   0x5C, 0x5D, 0x5E, 0x5F, 0x60, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66,
  73   0x67, 0x68, 0x69, 0x6A, 0x6B, 0x6C, 0x6D, 0x6E, 0x6F, 0x70, 0x71,
  74   0x72, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78, 0x79, 0x7A, 0x7B, 0x7C,
  75   0x7D, 0x7E, 0x7F, 0x80, 0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87,
  76   0x88, 0x89, 0x8A, 0x8B, 0x8C, 0x8D, 0x8E, 0x8F, 0x90, 0x91, 0x92,
  77   0x93, 0x94, 0x95, 0x96, 0x97, 0x98, 0x99, 0x9A, 0x9B, 0x9C, 0x9D,
  78   0x9E, 0x9F, 0xA0, 0xA1, 0xA2, 0xA3, 0xA4, 0xA5, 0xA6, 0xA7, 0xA8,
  79   0xA9, 0xAA, 0xAB, 0xAC, 0xAD, 0xAE, 0xAF, 0xB0, 0xB1, 0xB2, 0xB3,
  80   0xB4, 0xB5, 0xB6, 0xB7, 0xB8, 0xB9, 0xBA, 0xBB, 0xBC, 0xBD, 0xBE,
  81   0xBF, 0xC0, 0xC1, 0xC2, 0xC3, 0xC4, 0xC5, 0xC6, 0xC7, 0xC8, 0xC9,
  82   0xCA, 0xCB, 0xCC, 0xCD, 0xCE, 0xCF, 0xD0, 0xD1, 0xD2, 0xD3, 0xD4,
  83   0xD5, 0xD6, 0xD7, 0xD8, 0xD9, 0xDA, 0xDB, 0xDC, 0xDD, 0xDE, 0xDF,
  84   0xE0, 0xE1, 0xE2, 0xE3, 0xE4, 0xE5, 0xE6, 0xE7, 0xE8, 0xE9, 0xEA,
  85   0xEB, 0xEC, 0xED, 0xEE, 0xEF, 0xF0, 0xF1, 0xF2, 0xF3, 0xF4, 0xF5,
  86   0xF6, 0xF7, 0xF8, 0xF9, 0xFA, 0xFB, 0xFC, 0xFD, 0xFE, 0xFF, 0xFF,
  87   0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
  88   0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
  89   0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
  90   0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
  91   0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
  92   0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
  93   0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
  94   0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
  95   0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
  96   0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
  97   0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
  98   0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
  99 };
 100
 101 #define SOF_USED                        1               // Set if this sample is used
 102 #define SOF_PLAYING                     2               // Set if this sample is playing on a channel
 103 #define SOF_LINK_TO_OBJ         4               // Sound is linked to a moving object. If object dies, then finishes play and quits.
 104 #define SOF_LINK_TO_POS         8               // Sound is linked to segment, pos
 105 #define SOF_PLAY_FOREVER        16              // Play forever (or until level is stopped), otherwise plays once
 106
 107 typedef struct sound_object {
 108         short           signature;              // A unique signature to this sound
 109         ubyte           flags;                  // Used to tell if this slot is used and/or currently playing, and how long.
 110         fix             max_volume;             // Max volume that this sound is playing at
 111         fix             max_distance;           // The max distance that this sound can be heard at...
 112         int             volume;                 // Volume that this sound is playing at
 113         int             pan;                    // Pan value that this sound is playing at
 114         int             handle;                 // What handle this sound is playing on.  Valid only if SOF_PLAYING is set.
 115         short           soundnum;               // The sound number that is playing
 116         union {
 117                 struct {
 118                         short           segnum;                         // Used if SOF_LINK_TO_POS field is used
 119                         short           sidenum;
 120                         vms_vector      position;
 121                 }pos;
 122                 struct {
 123                         short            objnum;                         // Used if SOF_LINK_TO_OBJ field is used
 124                         short            objsignature;
 125                 }obj;
 126         }link;
 127 } sound_object;
 128 #define lp_segnum link.pos.segnum
 129 #define lp_sidenum link.pos.sidenum
 130 #define lp_position link.pos.position
 131
 132 #define lo_objnum link.obj.objnum
 133 #define lo_objsignature link.obj.objsignature
 134
 135 #define MAX_SOUND_OBJECTS 16
 136 sound_object SoundObjects[MAX_SOUND_OBJECTS];
 137 short next_signature=0;
 138
 139 //added/changed on 980905 by adb to make sfx volume work, on 990221 by adb changed F1_0 to F1_0 / 2
 140 #define SOUND_MAX_VOLUME (F1_0 / 2)
 141
 142 int digi_volume = SOUND_MAX_VOLUME;
 143 //end edit by adb
 144
 145 int digi_lomem = 0;
 146
 147 static int digi_initialised = 0;
 148
 149 struct sound_slot {
 150  int soundno;
 151  int playing;   // Is there a sample playing on this channel?
 152  int looped;    // Play this sample looped?
 153  fix pan;       // 0 = far left, 1 = far right
 154  fix volume;    // 0 = nothing, 1 = fully on
 155  //changed on 980905 by adb from char * to unsigned char *
 156  unsigned char *samples;
 157  //end changes by adb
 158  unsigned int length; // Length of the sample
 159  unsigned int position; // Position we are at at the moment.
 160 } SoundSlots[MAX_SOUND_SLOTS];
 161
 162 static int digi_sounds_initialized = 0;
 163
 164 //added on 980905 by adb to add rotating/volume based sound kill system
 165 static int digi_max_channels = 16;
 166 static int next_handle = 0;
 167 int SampleHandles[32];
 168 void reset_sounds_on_channel(int channel);
 169 //end edit by adb
 170
 171 /* Threading/ALSA stuff */
 172 #define LOCK() pthread_mutex_lock(&mutex)
 173 #define UNLOCK() pthread_mutex_unlock(&mutex)
 174 void *snd_devhandle;
 175 pthread_t thread_id;
 176 pthread_mutex_t mutex;
 177
 178
 179 void digi_reset_digi_sounds(void);
 180
 181
 182 /* Audio mixing callback */
 183 //changed on 980905 by adb to cleanup, add pan support and optimize mixer
 184 static void audio_mixcallback(void *userdata, ubyte *stream, int len)
 185 {
 186  ubyte *streamend = stream + len;
 187  struct sound_slot *sl;
 188
 189  for (sl = SoundSlots; sl < SoundSlots + MAX_SOUND_SLOTS; sl++)
 190  {
 191   if (sl->playing)
 192   {
 193    ubyte *sldata = sl->samples + sl->position, *slend = sl->samples + sl->length;
 194    ubyte *sp = stream;
 195    signed char v;
 196    fix vl, vr;
 197    int x;
 198
 199    if ((x = sl->pan) & 0x8000)
 200    {
 201     vl = 0x20000 - x * 2;
 202     vr = 0x10000;
 203    }
 204    else
 205    {
 206     vl = 0x10000;
 207     vr = x * 2;
 208    }
 209    vl = fixmul(vl, (x = sl->volume));
 210    vr = fixmul(vr, x);
 211    while (sp < streamend)
 212    {
 213     if (sldata == slend)
 214     {
 215      if (!sl->looped)
 216      {
 217       sl->playing = 0;
 218       break;
 219      }
 220      sldata = sl->samples;
 221     }
 222     v = *(sldata++) - 0x80;
 223     *(sp++) = mix8[ *sp + fixmul(v, vl) + 0x80 ];
 224     *(sp++) = mix8[ *sp + fixmul(v, vr) + 0x80 ];
 225    }
 226    sl->position = sldata - sl->samples;
 227   }
 228  }
 229 }
 230 //end changes by adb
 231
 232 void *mixer_thread(void *data) {
 233 // int i=0;
 234  ubyte buffer[512];
 235  /* Allow ourselves to be asynchronously cancelled */
 236  pthread_setcanceltype(PTHREAD_CANCEL_ASYNCHRONOUS, NULL);
 237  while (1) {
 238 //   printf("i=%d\n",i++);
 239    memset(buffer, 0x80, 512);
 240    LOCK();
 241    audio_mixcallback(NULL,buffer,512);
 242    UNLOCK();
 243    snd_pcm_write(snd_devhandle, buffer, 512);
 244  }
 245  return 0;
 246 }
 247
 248
 249 /* Initialise audio devices. */
 250 int digi_init()
 251 {
 252  int card=0, device=0, err;
 253  snd_pcm_format_t format;
 254  snd_pcm_playback_params_t params;
 255  pthread_attr_t attr;
 256  pthread_mutexattr_t mutexattr;
 257
 258  //added on 980905 by adb to init sound kill system
 259  memset(SampleHandles, 255, sizeof(SampleHandles));
 260  //end edit by adb
 261
 262  /* Open the ALSA sound device */
 263  if ((err = snd_pcm_open(&snd_devhandle, card, device,
 264      SND_PCM_OPEN_PLAYBACK)) < 0) {
 265      fprintf(stderr, "open failed: %s\n", snd_strerror( err ));
 266      return -1;
 267  }
 268
 269  memset(&format, 0, sizeof(format));
 270  format.format = SND_PCM_SFMT_U8;
 271  format.rate = 11025;
 272  format.channels = 2;
 273  if ((err = snd_pcm_playback_format(snd_devhandle, &format)) < 0) {
 274     fprintf(stderr, "format setup failed: %s\n", snd_strerror( err ));
 275     snd_pcm_close( snd_devhandle );
 276     return -1;
 277  }
 278
 279  memset(&params, 0, sizeof(params));
 280  params.fragment_size=512;
 281  params.fragments_max=2;
 282  params.fragments_room=1;
 283  if ((err = snd_pcm_playback_params(snd_devhandle, &params)) < 0) {
 284     fprintf(stderr, "params setup failed: %s\n", snd_strerror( err ));
 285     snd_pcm_close( snd_devhandle );
 286     return -1;
 287  }
 288
 289  /* Start the mixer thread */
 290
 291  /* We really should check the results of these */
 292  pthread_mutexattr_init(&mutexattr);
 293  pthread_mutex_init(&mutex,&mutexattr);
 294  pthread_mutexattr_destroy(&mutexattr);
 295
 296  if (pthread_attr_init(&attr) != 0) {
 297   fprintf(stderr, "failed to init attr\n");
 298   snd_pcm_close( snd_devhandle );
 299   return -1;
 300  }
 301
 302  pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED);
 303
 304  pthread_create(&thread_id,&attr,mixer_thread,NULL);
 305  pthread_attr_destroy(&attr);
 306
 307  atexit(digi_close);
 308  digi_initialised = 1;
 309  return 0;
 310 }
 311
 312 /* Toggle audio */
 313 void digi_reset() { }
 314
 315 /* Shut down audio */
 316 void digi_close()
 317 {
 318  if (!digi_initialised) return;
 319  digi_initialised = 0;
 320  snd_pcm_close(snd_devhandle);
 321  pthread_mutex_destroy(&mutex);
 322  pthread_cancel(thread_id);
 323 }
 324
 325 /* Find the sound which actually equates to a sound number */
 326 int digi_xlat_sound(int soundno)
 327 {
 328         if ( soundno < 0 ) return -1;
 329
 330         if ( digi_lomem )       {
 331                 soundno = AltSounds[soundno];
 332                 if ( soundno == 255 ) return -1;
 333         }
 334         return Sounds[soundno];
 335 }
 336
 337 static int get_free_slot()
 338 {
 339  int i;
 340  for (i=0; i<MAX_SOUND_SLOTS; i++)
 341  {
 342   if (!SoundSlots[i].playing) return i;
 343  }
 344  return -1;
 345 }
 346
 347 int digi_start_sound(int soundnum, fix volume, fix pan)
 348 {
 349  int ntries;
 350  int slot;
 351
 352  if (!digi_initialised) return -1;
 353  LOCK();
 354  //added on 980905 by adb from original source to add sound kill system
 355  // play at most digi_max_channel samples, if possible kill sample with low volume
 356  ntries = 0;
 357
 358 TryNextChannel:
 359  if ( (SampleHandles[next_handle] >= 0) && (SoundSlots[SampleHandles[next_handle]].playing)  )
 360  {
 361   if ( (SoundSlots[SampleHandles[next_handle]].volume > digi_volume) && (ntries<digi_max_channels) )
 362   {
 363    //mprintf(( 0, "Not stopping loud sound %d.\n", next_handle ));
 364    next_handle++;
 365    if ( next_handle >= digi_max_channels )
 366     next_handle = 0;
 367    ntries++;
 368    goto TryNextChannel;
 369   }
 370   //mprintf(( 0, "[SS:%d]", next_handle ));
 371   SoundSlots[SampleHandles[next_handle]].playing = 0;
 372   SampleHandles[next_handle] = -1;
 373  }
 374  //end edit by adb
 375
 376  slot = get_free_slot();
 377  if (slot<0) return -1;
 378
 379  SoundSlots[slot].soundno = soundnum;
 380  SoundSlots[slot].samples = GameSounds[soundnum].data;
 381  SoundSlots[slot].length = GameSounds[soundnum].length;
 382  SoundSlots[slot].volume = fixmul(digi_volume, volume);
 383  SoundSlots[slot].pan = pan;
 384  SoundSlots[slot].position = 0;
 385  SoundSlots[slot].looped = 0;
 386  SoundSlots[slot].playing = 1;
 387
 388  //added on 980905 by adb to add sound kill system from original sos digi.c
 389  reset_sounds_on_channel(slot);
 390  SampleHandles[next_handle] = slot;
 391  next_handle++;
 392  if ( next_handle >= digi_max_channels )
 393   next_handle = 0;
 394  //end edit by adb
 395  UNLOCK();
 396  return slot;
 397 }
 398
 399  //added on 980905 by adb to add sound kill system from original sos digi.c
 400 void reset_sounds_on_channel( int channel )
 401 {
 402  int i;
 403
 404  for (i=0; i<digi_max_channels; i++)
 405   if (SampleHandles[i] == channel)
 406    SampleHandles[i] = -1;
 407 }
 408 //end edit by adb
 409
 410 int digi_start_sound_object(int obj)
 411 {
 412  int slot;
 413
 414  if (!digi_initialised) return -1;
 415  LOCK();
 416  slot = get_free_slot();
 417
 418  if (slot<0) { UNLOCK(); return -1; }
 419
 420
 421  SoundSlots[slot].soundno = SoundObjects[obj].soundnum;
 422  SoundSlots[slot].samples = GameSounds[SoundObjects[obj].soundnum].data;
 423  SoundSlots[slot].length = GameSounds[SoundObjects[obj].soundnum].length;
 424  SoundSlots[slot].volume = fixmul(digi_volume, SoundObjects[obj].volume);
 425  SoundSlots[slot].pan = SoundObjects[obj].pan;
 426  SoundSlots[slot].position = 0;
 427  SoundSlots[slot].looped = (SoundObjects[obj].flags & SOF_PLAY_FOREVER);
 428  SoundSlots[slot].playing = 1;
 429
 430  SoundObjects[obj].signature = next_signature++;
 431  SoundObjects[obj].handle = slot;
 432
 433  SoundObjects[obj].flags |= SOF_PLAYING;
 434  //added on 980905 by adb to add sound kill system from original sos digi.c
 435  reset_sounds_on_channel(slot);
 436  //end edit by adb
 437
 438  UNLOCK();
 439  return 0;
 440 }
 441
 442
 443 // Play the given sound number.
 444 // Volume is max at F1_0.
 445 void digi_play_sample( int soundno, fix max_volume )
 446 {
 447 #ifdef NEWDEMO
 448         if ( Newdemo_state == ND_STATE_RECORDING )
 449                 newdemo_record_sound( soundno );
 450 #endif
 451         soundno = digi_xlat_sound(soundno);
 452
 453         if (!digi_initialised) return;
 454
 455         if (soundno < 0 ) return;
 456
 457         digi_start_sound(soundno, max_volume, F0_5);
 458 }
 459
 460 // Play the given sound number. If the sound is already playing,
 461 // restart it.
 462 void digi_play_sample_once( int soundno, fix max_volume )
 463 {
 464         int i;
 465
 466 #ifdef NEWDEMO
 467         if ( Newdemo_state == ND_STATE_RECORDING )
 468                 newdemo_record_sound( soundno );
 469 #endif
 470         soundno = digi_xlat_sound(soundno);
 471
 472         if (!digi_initialised) return;
 473
 474         if (soundno < 0 ) return;
 475
 476         LOCK();
 477         for (i=0; i < MAX_SOUND_SLOTS; i++)
 478           if (SoundSlots[i].soundno == soundno)
 479             SoundSlots[i].playing = 0;
 480         UNLOCK();
 481         digi_start_sound(soundno, max_volume, F0_5);
 482
 483 }
 484
 485 void digi_play_sample_3d( int soundno, int angle, int volume, int no_dups ) // Volume from 0-0x7fff
 486 {
 487         no_dups = 1;
 488
 489 #ifdef NEWDEMO
 490         if ( Newdemo_state == ND_STATE_RECORDING )              {
 491                 if ( no_dups )
 492                         newdemo_record_sound_3d_once( soundno, angle, volume );
 493                 else
 494                         newdemo_record_sound_3d( soundno, angle, volume );
 495         }
 496 #endif
 497         soundno = digi_xlat_sound(soundno);
 498
 499         if (!digi_initialised) return;
 500         if (soundno < 0 ) return;
 501
 502         if (volume < MIN_VOLUME ) return;
 503         digi_start_sound(soundno, volume, angle);
 504 }
 505
 506 void digi_get_sound_loc( vms_matrix * listener, vms_vector * listener_pos, int listener_seg, vms_vector * sound_pos, int sound_seg, fix max_volume, int *volume, int *pan, fix max_distance )
 507 {
 508         vms_vector      vector_to_sound;
 509         fix angle_from_ear, cosang,sinang;
 510         fix distance;
 511         fix path_distance;
 512
 513         *volume = 0;
 514         *pan = 0;
 515
 516         max_distance = (max_distance*5)/4;              // Make all sounds travel 1.25 times as far.
 517
 518         //      Warning: Made the vm_vec_normalized_dir be vm_vec_normalized_dir_quick and got illegal values to acos in the fang computation.
 519         distance = vm_vec_normalized_dir_quick( &vector_to_sound, sound_pos, listener_pos );
 520
 521         if (distance < max_distance )   {
 522                 int num_search_segs = f2i(max_distance/20);
 523                 if ( num_search_segs < 1 ) num_search_segs = 1;
 524
 525                 path_distance = find_connected_distance(listener_pos, listener_seg, sound_pos, sound_seg, num_search_segs, WID_RENDPAST_FLAG );
 526                 if ( path_distance > -1 )       {
 527                         *volume = max_volume - fixdiv(path_distance,max_distance);
 528                         //mprintf( (0, "Sound path distance %.2f, volume is %d / %d\n", f2fl(distance), *volume, max_volume ));
 529                         if (*volume > 0 )       {
 530                                 angle_from_ear = vm_vec_delta_ang_norm(&listener->rvec,&vector_to_sound,&listener->uvec);
 531                                 fix_sincos(angle_from_ear,&sinang,&cosang);
 532                                 //mprintf( (0, "volume is %.2f\n", f2fl(*volume) ));
 533                                 if (Config_channels_reversed) cosang *= -1;
 534                                 *pan = (cosang + F1_0)/2;
 535                         } else {
 536                                 *volume = 0;
 537                         }
 538                 }
 539         }
 540 }
 541
 542 int digi_link_sound_to_object2( int org_soundnum, short objnum, int forever, fix max_volume, fix  max_distance )
 543 {
 544         int i,volume,pan;
 545         object * objp;
 546         int soundnum;
 547
 548         soundnum = digi_xlat_sound(org_soundnum);
 549
 550         if ( max_volume < 0 ) return -1;
 551 //      if ( max_volume > F1_0 ) max_volume = F1_0;
 552
 553         if (!digi_initialised) return -1;
 554         if (soundnum < 0 ) return -1;
 555         if (GameSounds[soundnum].data==NULL) {
 556                 Int3();
 557                 return -1;
 558         }
 559         if ((objnum<0)||(objnum>Highest_object_index))
 560                 return -1;
 561
 562         if ( !forever ) {
 563                 // Hack to keep sounds from building up...
 564                 digi_get_sound_loc( &Viewer->orient, &Viewer->pos, Viewer->segnum, &Objects[objnum].pos, Objects[objnum].segnum, max_volume,&volume, &pan, max_distance );
 565                 digi_play_sample_3d( org_soundnum, pan, volume, 0 );
 566                 return -1;
 567         }
 568
 569         for (i=0; i<MAX_SOUND_OBJECTS; i++ )
 570                 if (SoundObjects[i].flags==0)
 571                    break;
 572
 573         if (i==MAX_SOUND_OBJECTS) {
 574                 mprintf((1, "Too many sound objects!\n" ));
 575                 return -1;
 576         }
 577
 578         SoundObjects[i].signature=next_signature++;
 579         SoundObjects[i].flags = SOF_USED | SOF_LINK_TO_OBJ;
 580         if ( forever )
 581                 SoundObjects[i].flags |= SOF_PLAY_FOREVER;
 582         SoundObjects[i].lo_objnum = objnum;
 583         SoundObjects[i].lo_objsignature = Objects[objnum].signature;
 584         SoundObjects[i].max_volume = max_volume;
 585         SoundObjects[i].max_distance = max_distance;
 586         SoundObjects[i].volume = 0;
 587         SoundObjects[i].pan = 0;
 588         SoundObjects[i].soundnum = soundnum;
 589
 590         objp = &Objects[SoundObjects[i].lo_objnum];
 591         digi_get_sound_loc( &Viewer->orient, &Viewer->pos, Viewer->segnum,
 592                        &objp->pos, objp->segnum, SoundObjects[i].max_volume,
 593                        &SoundObjects[i].volume, &SoundObjects[i].pan, SoundObjects[i].max_distance );
 594
 595         if (!forever || SoundObjects[i].volume >= MIN_VOLUME)
 596                digi_start_sound_object(i);
 597
 598         return SoundObjects[i].signature;
 599 }
 600
 601 int digi_link_sound_to_object( int soundnum, short objnum, int forever, fix max_volume )
 602 { return digi_link_sound_to_object2( soundnum, objnum, forever, max_volume, 256*F1_0); }
 603
 604 int digi_link_sound_to_pos2( int org_soundnum, short segnum, short sidenum, vms_vector * pos, int forever, fix max_volume, fix max_distance )
 605 {
 606         int i, volume, pan;
 607         int soundnum;
 608
 609         soundnum = digi_xlat_sound(org_soundnum);
 610
 611         if ( max_volume < 0 ) return -1;
 612 //      if ( max_volume > F1_0 ) max_volume = F1_0;
 613
 614         if (!digi_initialised) return -1;
 615         if (soundnum < 0 ) return -1;
 616         if (GameSounds[soundnum].data==NULL) {
 617                 Int3();
 618                 return -1;
 619         }
 620
 621         if ((segnum<0)||(segnum>Highest_segment_index))
 622                 return -1;
 623
 624         if ( !forever ) {
 625                 // Hack to keep sounds from building up...
 626                 digi_get_sound_loc( &Viewer->orient, &Viewer->pos, Viewer->segnum, pos, segnum, max_volume, &volume, &pan, max_distance );
 627                 digi_play_sample_3d( org_soundnum, pan, volume, 0 );
 628                 return -1;
 629         }
 630
 631         for (i=0; i<MAX_SOUND_OBJECTS; i++ )
 632                 if (SoundObjects[i].flags==0)
 633                         break;
 634
 635         if (i==MAX_SOUND_OBJECTS) {
 636                 mprintf((1, "Too many sound objects!\n" ));
 637                 return -1;
 638         }
 639
 640
 641         SoundObjects[i].signature=next_signature++;
 642         SoundObjects[i].flags = SOF_USED | SOF_LINK_TO_POS;
 643         if ( forever )
 644                 SoundObjects[i].flags |= SOF_PLAY_FOREVER;
 645         SoundObjects[i].lp_segnum = segnum;
 646         SoundObjects[i].lp_sidenum = sidenum;
 647         SoundObjects[i].lp_position = *pos;
 648         SoundObjects[i].soundnum = soundnum;
 649         SoundObjects[i].max_volume = max_volume;
 650         SoundObjects[i].max_distance = max_distance;
 651         SoundObjects[i].volume = 0;
 652         SoundObjects[i].pan = 0;
 653         digi_get_sound_loc( &Viewer->orient, &Viewer->pos, Viewer->segnum,
 654                                            &SoundObjects[i].lp_position, SoundObjects[i].lp_segnum,
 655                                            SoundObjects[i].max_volume,
 656                        &SoundObjects[i].volume, &SoundObjects[i].pan, SoundObjects[i].max_distance );
 657
 658         if (!forever || SoundObjects[i].volume >= MIN_VOLUME)
 659                 digi_start_sound_object(i);
 660
 661         return SoundObjects[i].signature;
 662 }
 663
 664 int digi_link_sound_to_pos( int soundnum, short segnum, short sidenum, vms_vector * pos, int forever, fix max_volume )
 665 {
 666         return digi_link_sound_to_pos2( soundnum, segnum, sidenum, pos, forever, max_volume, F1_0 * 256 );
 667 }
 668
 669 void digi_kill_sound_linked_to_segment( int segnum, int sidenum, int soundnum )
 670 {
 671         int i,killed;
 672
 673         soundnum = digi_xlat_sound(soundnum);
 674
 675         if (!digi_initialised) return;
 676
 677         killed = 0;
 678
 679         for (i=0; i<MAX_SOUND_OBJECTS; i++ )    {
 680                 if ( (SoundObjects[i].flags & SOF_USED) && (SoundObjects[i].flags & SOF_LINK_TO_POS) )  {
 681                         if ((SoundObjects[i].lp_segnum == segnum) && (SoundObjects[i].soundnum==soundnum ) && (SoundObjects[i].lp_sidenum==sidenum) ) {
 682                                 if ( SoundObjects[i].flags & SOF_PLAYING )      {
 683                                         LOCK();
 684                                         SoundSlots[SoundObjects[i].handle].playing = 0;
 685                                         UNLOCK();
 686                                 }
 687                                 SoundObjects[i].flags = 0;      // Mark as dead, so some other sound can use this sound
 688                                 killed++;
 689                         }
 690                 }
 691         }
 692         // If this assert happens, it means that there were 2 sounds
 693         // that got deleted. Weird, get John.
 694         if ( killed > 1 )       {
 695                 mprintf( (1, "ERROR: More than 1 sounds were deleted from seg %d\n", segnum ));
 696         }
 697 }
 698
 699 void digi_kill_sound_linked_to_object( int objnum )
 700 {
 701         int i,killed;
 702
 703         if (!digi_initialised) return;
 704
 705         killed = 0;
 706
 707         for (i=0; i<MAX_SOUND_OBJECTS; i++ )    {
 708                 if ( (SoundObjects[i].flags & SOF_USED) && (SoundObjects[i].flags & SOF_LINK_TO_OBJ ) ) {
 709                         if (SoundObjects[i].lo_objnum == objnum)   {
 710                                 if ( SoundObjects[i].flags & SOF_PLAYING )      {
 711                                      LOCK();
 712                                      SoundSlots[SoundObjects[i].handle].playing = 0;
 713                                      UNLOCK();
 714                                 }
 715                                 SoundObjects[i].flags = 0;      // Mark as dead, so some other sound can use this sound
 716                                 killed++;
 717                         }
 718                 }
 719         }
 720         // If this assert happens, it means that there were 2 sounds
 721         // that got deleted. Weird, get John.
 722         if ( killed > 1 )       {
 723                 mprintf( (1, "ERROR: More than 1 sounds were deleted from object %d\n", objnum ));
 724         }
 725 }
 726
 727 void digi_sync_sounds()
 728 {
 729         int i;
 730         int oldvolume, oldpan;
 731
 732         if (!digi_initialised) return;
 733
 734         for (i=0; i<MAX_SOUND_OBJECTS; i++ )    {
 735                 if ( SoundObjects[i].flags & SOF_USED ) {
 736                         oldvolume = SoundObjects[i].volume;
 737                         oldpan = SoundObjects[i].pan;
 738
 739                         if ( !(SoundObjects[i].flags & SOF_PLAY_FOREVER) )      {
 740                                 // Check if its done.
 741                                 if (SoundObjects[i].flags & SOF_PLAYING) {
 742                                         LOCK();
 743                                         if (!SoundSlots[SoundObjects[i].handle].playing) {
 744                                                 UNLOCK();
 745                                                 SoundObjects[i].flags = 0;      // Mark as dead, so some other sound can use this sound
 746                                                 continue;               // Go on to next sound...
 747                                         }
 748                                         UNLOCK();
 749                                 }
 750                         }
 751
 752                         if ( SoundObjects[i].flags & SOF_LINK_TO_POS )  {
 753                                 digi_get_sound_loc( &Viewer->orient, &Viewer->pos, Viewer->segnum,
 754                                                                 &SoundObjects[i].lp_position, SoundObjects[i].lp_segnum,
 755                                                                 SoundObjects[i].max_volume,
 756                                 &SoundObjects[i].volume, &SoundObjects[i].pan, SoundObjects[i].max_distance );
 757
 758                         } else if ( SoundObjects[i].flags & SOF_LINK_TO_OBJ )   {
 759                                 object * objp;
 760
 761                                 objp = &Objects[SoundObjects[i].lo_objnum];
 762
 763                                 if ((objp->type==OBJ_NONE) || (objp->signature!=SoundObjects[i].lo_objsignature))  {
 764                                         // The object that this is linked to is dead, so just end this sound if it is looping.
 765                                         if ( (SoundObjects[i].flags & SOF_PLAYING)  && (SoundObjects[i].flags & SOF_PLAY_FOREVER))      {
 766                                              LOCK();
 767                                              SoundSlots[SoundObjects[i].handle].playing = 0;
 768                                              UNLOCK();
 769                                         }
 770                                         SoundObjects[i].flags = 0;      // Mark as dead, so some other sound can use this sound
 771                                         continue;               // Go on to next sound...
 772                                 } else {
 773                                         digi_get_sound_loc( &Viewer->orient, &Viewer->pos, Viewer->segnum,
 774                                         &objp->pos, objp->segnum, SoundObjects[i].max_volume,
 775                                    &SoundObjects[i].volume, &SoundObjects[i].pan, SoundObjects[i].max_distance );
 776                                 }
 777                         }
 778
 779                         if (oldvolume != SoundObjects[i].volume)        {
 780                                 if ( SoundObjects[i].volume < MIN_VOLUME )       {
 781                                         // Sound is too far away, so stop it from playing.
 782                                         if ((SoundObjects[i].flags & SOF_PLAYING)&&(SoundObjects[i].flags & SOF_PLAY_FOREVER))  {
 783                                                 LOCK();
 784                                                 SoundSlots[SoundObjects[i].handle].playing = 0;
 785                                                 UNLOCK();
 786                                                 SoundObjects[i].flags &= ~SOF_PLAYING;          // Mark sound as not playing
 787                                         }
 788                                 } else {
 789                                         if (!(SoundObjects[i].flags & SOF_PLAYING))     {
 790                                                 digi_start_sound_object(i);
 791                                         } else {
 792                                                 LOCK();
 793                                                 SoundSlots[SoundObjects[i].handle].volume = fixmuldiv(SoundObjects[i].volume,digi_volume,F1_0);
 794                                                 UNLOCK();
 795                                         }
 796                                 }
 797                         }
 798
 799                         if (oldpan != SoundObjects[i].pan)      {
 800                                 if (SoundObjects[i].flags & SOF_PLAYING) {
 801                                         LOCK();
 802                                         SoundSlots[SoundObjects[i].handle].pan = SoundObjects[i].pan;
 803                                         UNLOCK();
 804                                 }
 805                         }
 806                 }
 807         }
 808 }
 809
 810 void digi_init_sounds()
 811 {
 812         int i;
 813
 814         if (!digi_initialised) return;
 815
 816         digi_reset_digi_sounds();
 817
 818         for (i=0; i<MAX_SOUND_OBJECTS; i++ )    {
 819                 if (digi_sounds_initialized) {
 820                         if ( SoundObjects[i].flags & SOF_PLAYING )      {
 821                                 LOCK();
 822                                 SoundSlots[SoundObjects[i].handle].playing=0;
 823                                 UNLOCK();
 824                         }
 825                 }
 826                 SoundObjects[i].flags = 0;      // Mark as dead, so some other sound can use this sound
 827         }
 828         digi_sounds_initialized = 1;
 829 }
 830
 831 //added on 980905 by adb from original source to make sfx volume work
 832 void digi_set_digi_volume( int dvolume )
 833 {
 834         dvolume = fixmuldiv( dvolume, SOUND_MAX_VOLUME, 0x7fff);
 835         if ( dvolume > SOUND_MAX_VOLUME )
 836                 digi_volume = SOUND_MAX_VOLUME;
 837         else if ( dvolume < 0 )
 838                 digi_volume = 0;
 839         else
 840                 digi_volume = dvolume;
 841
 842         if ( !digi_initialised ) return;
 843
 844         digi_sync_sounds();
 845 }
 846 //end edit by adb
 847
 848 void digi_set_volume( int dvolume, int mvolume ) { }
 849
 850 int digi_is_sound_playing(int soundno)
 851 {
 852         int i;
 853
 854         soundno = digi_xlat_sound(soundno);
 855
 856         LOCK();
 857         for (i = 0; i < MAX_SOUND_SLOTS; i++)
 858                   //changed on 980905 by adb: added SoundSlots[i].playing &&
 859                   if (SoundSlots[i].playing && SoundSlots[i].soundno == soundno)
 860                   //end changes by adb
 861                   { UNLOCK();   return 1; }
 862         UNLOCK();
 863         return 0;
 864 }
 865
 866
 867 void digi_pause_all() { }
 868 void digi_resume_all() { }
 869 void digi_stop_all() { }
 870
 871  //added on 980905 by adb to make sound channel setting work
 872 void digi_set_max_channels(int n) {
 873         digi_max_channels       = n;
 874
 875         if ( digi_max_channels < 1 )
 876                 digi_max_channels = 1;
 877         if ( digi_max_channels > (MAX_SOUND_SLOTS-MAX_SOUND_OBJECTS) )
 878                 digi_max_channels = (MAX_SOUND_SLOTS-MAX_SOUND_OBJECTS);
 879
 880         if ( !digi_initialised ) return;
 881
 882         digi_reset_digi_sounds();
 883 }
 884
 885 int digi_get_max_channels() {
 886         return digi_max_channels;
 887 }
 888 // end edit by adb
 889
 890 void digi_reset_digi_sounds() {
 891  int i;
 892
 893  LOCK();
 894  for (i=0; i< MAX_SOUND_SLOTS; i++)
 895   SoundSlots[i].playing=0;
 896  UNLOCK();
 897
 898  //added on 980905 by adb to reset sound kill system
 899  memset(SampleHandles, 255, sizeof(SampleHandles));
 900  next_handle = 0;
 901  //end edit by adb
 902 }
 903
 904
 905 // MIDI stuff follows.
 906 //added/killed on 11/25/98 by Matthew Mueller
 907 //void digi_set_midi_volume( int mvolume ) { }
 908 //void digi_play_midi_song( char * filename, char * melodic_bank, char * drum_bank, int loop ) {}
 909 //void digi_stop_current_song()
 910 //{
 911 //#ifdef HMIPLAY
 912 //        char buf[10];
 913 //
 914 //        sprintf(buf,"s");
 915 //        send_ipc(buf);
 916 //#endif
 917 //}
 918 //end this section kill - MM