void S_StaticSound (sfx_t *sfx, vec3_t origin, float vol, float attenuation)
{
channel_t *ss;
sfxcache_t *sc;
if (!shm || !sfx || s_nosound.value)
return;
if (total_channels == MAX_CHANNELS) {
Com_Printf ("total_channels == MAX_CHANNELS\n");
return;
}
ss = &channels[total_channels];
total_channels++;
sc = S_LoadSound (sfx);
if (!sc)
return;
if (sc->loopstart == -1) {
Com_Printf ("Sound %s not looped\n", sfx->name);
return;
}
ss->sfx = sfx;
VectorCopy (origin, ss->origin);
ss->master_vol = (int) vol;
ss->dist_mult = (attenuation/64) / sound_nominal_clip_dist;
ss->end = paintedtime + (int) sc->total_length;
SND_Spatialize (ss);
}
void S_StartSound (int entnum, int entchannel, sfx_t *sfx, vec3_t origin, float fvol, float attenuation)
{
channel_t *target_chan, *check;
sfxcache_t *sc;
int ch_idx, skip;
if (!shm || !sfx || s_nosound.value)
return;
// pick a channel to play on
target_chan = SND_PickChannel(entnum, entchannel);
if (!target_chan)
return;
// spatialize
memset (target_chan, 0, sizeof(*target_chan));
VectorCopy(origin, target_chan->origin);
target_chan->dist_mult = attenuation / sound_nominal_clip_dist;
target_chan->master_vol = (int) (fvol * 255);
target_chan->entnum = entnum;
target_chan->entchannel = entchannel;
SND_Spatialize(target_chan);
if (!target_chan->leftvol && !target_chan->rightvol)
return; // not audible at all
// new channel
sc = S_LoadSound (sfx);
if (!sc) {
target_chan->sfx = NULL;
return; // couldn't load the sound's data
}
target_chan->sfx = sfx;
target_chan->pos = 0.0;
target_chan->end = paintedtime + (int) sc->total_length;
// if an identical sound has also been started this frame, offset the pos
// a bit to keep it from just making the first one louder
check = &channels[NUM_AMBIENTS];
for (ch_idx=NUM_AMBIENTS; ch_idx < NUM_AMBIENTS + MAX_DYNAMIC_CHANNELS; ch_idx++, check++) {
if (check == target_chan)
continue;
if (check->sfx == sfx && !check->pos) {
skip = rand () % (int)(0.1 * shm->format.speed);
if (skip >= target_chan->end)
skip = target_chan->end - 1;
target_chan->pos += skip;
target_chan->end -= skip;
break;
}
}
}
/*
=================
S_StaticSound
=================
*/
void S_StaticSound (sfx_t *sfx, vec3_t origin, float vol, float attenuation)
{
channel_t *ss;
sfxcache_t *sc;
if (!sfx)
return;
if (total_channels == MAX_CHANNELS)
{
Con_Printf ("StaticSound: MAX_CHANNELS reached\n");
Con_Printf (" failed at (%.2f, %.2f, %.2f)\n",origin[0],origin[1],origin[2]);
return;
}
ss = &channels[total_channels];
total_channels++;
sc = S_LoadSound (sfx);
if (!sc)
return;
if (sc->loopstart == -1)
{
Con_Printf ("Sound %s not looped\n", sfx->name);
return;
}
ss->sfx = sfx;
VectorCopy (origin, ss->origin);
ss->master_vol = vol;
ss->dist_mult = (attenuation/64) / sound_nominal_clip_dist;
ss->end = paintedtime + sc->length;
SND_Spatialize (ss);
}
/*
============
S_Update
Called once each time through the main loop
============
*/
void S_Update(vec3_t origin, vec3_t forward, vec3_t right, vec3_t up)
{
int i, j;
int total;
channel_t *ch;
channel_t *combine;
if (!sound_started || (snd_blocked > 0))
return;
VectorCopy(origin, listener_origin);
VectorCopy(forward, listener_forward);
VectorCopy(right, listener_right);
VectorCopy(up, listener_up);
// update general area ambient sound sources
S_UpdateAmbientSounds ();
combine = NULL;
// update spatialization for static and dynamic sounds
ch = channels+NUM_AMBIENTS;
for (i=NUM_AMBIENTS ; i<total_channels; i++, ch++)
{
if (!ch->sfx)
continue;
SND_Spatialize(ch); // respatialize channel
if (!ch->leftvol && !ch->rightvol)
continue;
// try to combine static sounds with a previous channel of the same
// sound effect so we don't mix five torches every frame
if (i >= MAX_DYNAMIC_CHANNELS + NUM_AMBIENTS)
{
// see if it can just use the last one
if (combine && combine->sfx == ch->sfx)
{
combine->leftvol += ch->leftvol;
combine->rightvol += ch->rightvol;
ch->leftvol = ch->rightvol = 0;
continue;
}
// search for one
combine = channels+MAX_DYNAMIC_CHANNELS + NUM_AMBIENTS;
for (j=MAX_DYNAMIC_CHANNELS + NUM_AMBIENTS ; j<i; j++, combine++)
if (combine->sfx == ch->sfx)
break;
if (j == total_channels)
{
combine = NULL;
}
else
{
if (combine != ch)
{
combine->leftvol += ch->leftvol;
combine->rightvol += ch->rightvol;
ch->leftvol = ch->rightvol = 0;
}
continue;
}
}
}
//
// debugging output
//
if (snd_show.value)
{
total = 0;
ch = channels;
for (i=0 ; i<total_channels; i++, ch++)
if (ch->sfx && (ch->leftvol || ch->rightvol) )
{
Con_Printf ("%s %3i %3i\n", ch->sfx->name, ch->leftvol, ch->rightvol);
total++;
}
Con_Printf ("----(%i)----\n", total);
}
// mix some sound
S_Update_();
}