ref: 9510b4cae3b95ddea506206756b725a9c5c11148
dir: /snd_openal.c/
#include "quakedef.h"
#include <AL/al.h>
#include <AL/alc.h>
#include <AL/alext.h>
#include <sys/wait.h>
#include <unistd.h>
#include <pthread.h>
typedef struct albuf_t albuf_t;
typedef struct alchan_t alchan_t;
struct albuf_t {
ALuint buf;
bool loop;
bool upsample;
};
struct alchan_t {
int ent;
int ch;
ALuint src;
alchan_t *prev, *next;
};
enum {
Srcstatic = -666,
Srcamb,
};
cvar_t volume = {"volume", "0.7", true};
static struct {
ALuint src, buf;
int pcm, dec;
int len;
bool playing;
bool stop;
pid_t decoder;
pthread_t reader;
}track;
static cvar_t s_al_dev = {"s_al_device", "0", true};
static cvar_t s_al_hrtf = {"s_al_hrtf", "0", true};
static cvar_t s_al_doppler_factor = {"s_al_doppler_factor", "2", true};
static cvar_t s_al_resampler_default = {"s_al_resampler_default", "6", true}; // 23rd order Sinc
static cvar_t s_al_resampler_up = {"s_al_resampler_up", "1", true}; // Linear
static ALCcontext *ctx;
static ALCdevice *dev;
static Sfx *known_sfx;
static int num_sfx;
static int map;
static alchan_t *chans;
static cvar_t ambient_level = {"ambient_level", "0.3"};
static cvar_t ambient_fade = {"ambient_fade", "100"};
static Sfx *ambsfx[Namb];
static float ambvol[Namb];
static int al_default_resampler, al_num_resamplers;
static ALchar *(*qalGetStringiSOFT)(ALenum, ALsizei);
static ALCchar *(*qalcGetStringiSOFT)(ALCdevice *, ALenum, ALsizei);
static ALCboolean (*qalcResetDeviceSOFT)(ALCdevice *, const ALCint *attr);
static ALCboolean *(*qalcReopenDeviceSOFT)(ALCdevice *, const ALCchar *devname, const ALCint *attr);
typedef ALsizei (*qalBufferCallbackTypeSOFT)(ALvoid *, ALvoid *, ALsizei);
static void (*qalBufferCallbackSOFT)(ALuint buf, ALenum fmt, ALsizei freq, qalBufferCallbackTypeSOFT cb, ALvoid *aux);
#define ALERR() alcheckerr(__FILE__, __LINE__)
static int
alcheckerr(const char *file, int line)
{
int e, ret;
char *s, tmp[32];
ret = 0;
if(ctx != nil && (e = alGetError()) != AL_NO_ERROR){
switch(e){
case AL_INVALID_NAME: s = "invalid name"; break;
case AL_INVALID_ENUM: s = "invalid enum"; break;
case AL_INVALID_VALUE: s = "invalid value"; break;
case AL_INVALID_OPERATION: s = "invalid operation"; break;
case AL_OUT_OF_MEMORY: s = "out of memory"; break;
default:
snprint(tmp, sizeof(tmp), "unknown (0x%x)", e);
s = tmp;
break;
}
ret |= e;
fprintf(stderr, "AL: %s:%d: %s\n", file, line, s);
}
if(dev != nil && (e = alcGetError(dev)) != ALC_NO_ERROR){
switch(e){
case ALC_INVALID_DEVICE: s = "invalid device"; break;
case ALC_INVALID_ENUM: s = "invalid enum"; break;
case ALC_INVALID_VALUE: s = "invalid value"; break;
case ALC_INVALID_CONTEXT: s = "invalid context"; break;
case ALC_OUT_OF_MEMORY: s = "out of memory"; break;
default:
snprint(tmp, sizeof(tmp), "unknown error (0x%x)", e);
s = tmp;
break;
}
ret |= e;
fprintf(stderr, "ALC: %s:%d: %s\n", file, line, s);
}
return ret;
}
static alchan_t *
getchan(int ent, int ch)
{
alchan_t *c, *stopped;
ALint state;
ALuint src;
stopped = nil;
for(c = chans; c != nil; c = c->next){
if(c->ent == ent && c->ch == ch)
return c;
if(stopped == nil){
alGetSourcei(c->src, AL_SOURCE_STATE, &state);
if(!ALERR() && state != AL_PLAYING)
stopped = c;
}
}
if(stopped != nil){
c = stopped;
c->ent = ent;
c->ch = ch;
return c;
}
alGenSources(1, &src);
if(ALERR())
return nil;
c = calloc(1, sizeof(*c));
c->ent = ent;
c->ch = ch;
c->src = src;
c->next = chans;
if(chans != nil)
chans->prev = c;
chans = c;
return c;
}
static void
delchan(alchan_t *c)
{
if(c->prev != nil)
c->prev->next = c->next;
if(c->next != nil)
c->next->prev = c->prev;
if(chans == c)
chans = c->next;
alSourceStop(c->src); ALERR();
alSourcei(c->src, AL_BUFFER, 0); ALERR();
alDeleteSources(1, &c->src); ALERR();
free(c);
}
static Sfx *
findsfx(char *s)
{
Sfx *sfx, *e;
albuf_t *b;
if(strlen(s) >= Npath)
Host_Error("findsfx: path too long %s", s);
sfx = known_sfx;
e = known_sfx + num_sfx;
while(sfx < e){
if(strcmp(sfx->s, s) == 0){
sfx->map = map;
return sfx;
}
sfx++;
}
if(num_sfx == MAX_SOUNDS){
sfx = known_sfx;
while(sfx < e){
if(sfx->map && sfx->map < map)
break;
sfx++;
}
if(sfx == e)
Host_Error("findsfx: sfx list overflow: %s", s);
if((b = Cache_Check(&sfx->cu)) != nil){
alDeleteBuffers(1, &b->buf); ALERR();
Cache_Free(&sfx->cu);
sfx->map = map;
}
}else
num_sfx++;
strcpy(sfx->s, s);
return sfx;
}
static albuf_t *
loadsfx(Sfx *sfx)
{
ALint loop[2];
wavinfo_t info;
ALuint buf;
ALenum fmt;
albuf_t *b;
byte *in;
int len;
if((b = Cache_Check(&sfx->cu)) != nil)
return b;
in = loadstklmp(va("sound/%s", sfx->s), nil, 0, &len);
if(in == nil){
Con_DPrintf("loadsfx: %s\n", lerr());
return nil;
}
if(wavinfo(in, len, &info) != 0){
Con_Printf("loadsfx: %s: %s\n", sfx->s, lerr());
// complain but get some silence in place so it looks like it got loaded
memset(&info, 0, sizeof(info));
info.width = 8;
info.channels = 1;
info.rate = 11025;
info.loopofs = -1;
}
if(info.channels < 2)
fmt = info.width == 1 ? AL_FORMAT_MONO8 : AL_FORMAT_MONO16;
else
fmt = info.width == 1 ? AL_FORMAT_STEREO8 : AL_FORMAT_STEREO16;
alGenBuffers(1, &buf);
if(ALERR())
return nil;
alBufferData(buf, fmt, in+info.dataofs, info.samples*info.width, info.rate);
if(ALERR()){
alDeleteBuffers(1, &buf); ALERR();
return nil;
}
b = Cache_Alloc(&sfx->cu, sizeof(*b));
b->buf = buf;
if(info.loopofs >= 0){
loop[0] = info.loopofs;
loop[1] = info.samples;
alBufferiv(b->buf, AL_LOOP_POINTS_SOFT, loop); ALERR();
b->loop = true;
}
b->upsample = info.rate < 22050;
return b;
}
static void
alplay(alchan_t *c, albuf_t *b, vec3_t zp, float vol, float att, bool rel, bool loop)
{
ALint src;
int n;
src = c->src;
if(rel){
alSourcefv(src, AL_POSITION, vec3_origin); ALERR();
alSourcei(src, AL_SOURCE_RELATIVE, AL_TRUE); ALERR();
alSourcef(src, AL_ROLLOFF_FACTOR, 0.0f); ALERR();
alSourcef(src, AL_REFERENCE_DISTANCE, 0.0f); ALERR();
}else{
alSourcefv(src, AL_POSITION, zp); ALERR();
alSourcei(src, AL_SOURCE_RELATIVE, AL_FALSE); ALERR();
alSourcef(src, AL_ROLLOFF_FACTOR, att * 8.191); ALERR();
alSourcef(src, AL_REFERENCE_DISTANCE, 1.0f); ALERR();
alSourcef(src, AL_MAX_DISTANCE, 8192.0f); ALERR();
}
alSourcef(src, AL_GAIN, vol); ALERR();
if(al_num_resamplers > 0){
n = b->upsample ? s_al_resampler_up.value : s_al_resampler_default.value;
if(n >= 0){
alSourcei(src, AL_SOURCE_RESAMPLER_SOFT, n);
ALERR();
}
}
alSourcei(src, AL_BUFFER, b->buf); ALERR();
alSourcei(src, AL_LOOPING, (b->loop || loop) ? AL_TRUE : AL_FALSE); ALERR();
alSourcePlay(src); ALERR();
}
static void
ambs(vec3_t org)
{
float vol, *av;
ALint state;
alchan_t *ch;
byte *asl;
mleaf_t *l;
albuf_t *b;
Sfx *sfx;
int i;
if(cl.worldmodel == nil)
return;
l = Mod_PointInLeaf(org, cl.worldmodel);
asl = l->ambient_sound_level;
for(i = 0; i < Namb; i++){
if((sfx = ambsfx[i]) == nil || (b = loadsfx(sfx)) == nil)
continue;
vol = ambient_level.value * asl[i];
av = &ambvol[i];
if(vol < 8)
vol = 0;
if(*av < vol){
*av += host_frametime * ambient_fade.value;
if(*av > vol)
*av = vol;
}else if(*av > vol){
*av -= host_frametime * ambient_fade.value;
if(*av < vol)
*av = vol;
}
if((ch = getchan(Srcamb, i)) != nil){
alSourcef(ch->src, AL_GAIN, *av / 255.0f); ALERR();
alGetSourcei(ch->src, AL_SOURCE_STATE, &state);
if(!ALERR() && state != AL_PLAYING)
alplay(ch, b, vec3_origin, *av, 0.0f, true, true);
}
}
}
void
stepsnd(vec3_t zp, vec3_t fw, vec3_t rt, vec3_t up)
{
vec_t fwup[6] = {fw[0], fw[1], fw[2], up[0], up[1], up[2]};
alchan_t *c, *next;
static vec3_t ozp;
ALint state;
vec3_t vel;
if(dev == nil)
return;
if(zp == vec3_origin && fw == vec3_origin && rt == vec3_origin){
alListenerf(AL_GAIN, 0);
ALERR();
return;
}
alListenerfv(AL_POSITION, zp); ALERR();
alListenerfv(AL_ORIENTATION, fwup); ALERR();
VectorSubtract(zp, ozp, vel);
VectorCopy(zp, ozp);
alListenerfv(AL_VELOCITY, vel); ALERR();
alListenerf(AL_GAIN, volume.value); ALERR();
ambs(zp);
for(c = chans; c != nil; c = next){
next = c->next;
alGetSourcei(c->src, AL_SOURCE_STATE, &state);
if(!ALERR() && state != AL_PLAYING)
delchan(c);
}
}
void
stopallsfx(void)
{
alchan_t *c, *next;
if(dev == nil)
return;
alListenerf(AL_GAIN, 0); ALERR();
for(c = chans; c != nil; c = next){
next = c->next;
delchan(c);
}
chans = nil;
memset(ambvol, 0, sizeof(ambvol));
}
void
stopsfx(int ent, int ch)
{
alchan_t *c;
if(dev == nil)
return;
for(c = chans; c != nil; c = c->next){
if(c->ent == ent && c->ch == ch)
break;
}
if(c == nil)
return;
if(c->prev != nil)
c->prev->next = c->next;
if(c->next != nil)
c->next->prev = c->prev;
if(chans == c)
chans = c->next;
delchan(c);
if(ent == Srcamb)
ambvol[ch] = 0;
}
void
startsfx(int ent, int ch, Sfx *sfx, vec3_t zp, float vol, float att)
{
alchan_t *c;
albuf_t *b;
if(dev == nil || (b = loadsfx(sfx)) == nil || (c = getchan(ent, ch)) == nil)
return;
alSourceStop(c->src); ALERR();
alplay(c, b, zp, vol, att, ent == cl.viewentity, ent == Srcstatic);
}
void
localsfx(char *name)
{
if(dev == nil)
return;
startsfx(cl.viewentity, -1, findsfx(name), vec3_origin, 1.0f, 1.0f);
}
void
staticsfx(Sfx *sfx, vec3_t zp, float vol, float att)
{
static int numst = 0;
if(dev == nil)
return;
startsfx(Srcstatic, numst++, sfx, zp, vol, att/1.5f);
}
void
touchsfx(char *s)
{
Sfx *sfx;
if(dev == nil)
return;
sfx = findsfx(s);
Cache_Check(&sfx->cu);
}
Sfx *
precachesfx(char *s)
{
Sfx *sfx;
if(dev == nil)
return nil;
sfx = findsfx(s);
sfx->map = map;
loadsfx(sfx);
return sfx;
}
static ALCint *
alcattr(bool hrtf)
{
static ALCint attr[16] = {0};
int i;
attr[i = 0] = 0;
if(hrtf){
attr[i++] = s_al_hrtf.value != 0 ? ALC_HRTF_SOFT : 0;
attr[i++] = s_al_hrtf.value != 0 ? (s_al_hrtf.value > 0 ? ALC_TRUE : ALC_FALSE) : ALC_DONT_CARE_SOFT;
if(attr[i-1] == ALC_TRUE){
attr[i++] = ALC_HRTF_ID_SOFT;
attr[i++] = s_al_hrtf.value - 1;
}
}
/* get more sources, those get depleated fast with AD */
attr[i++] = ALC_MONO_SOURCES;
attr[i++] = 512;
attr[i++] = 0;
return attr;
}
static int
alinit(const char *devname)
{
ALCcontext *c;
int e;
dev = alcOpenDevice(devname); ALERR();
if(dev == nil)
return -1;
c = alcCreateContext(dev, nil); ALERR();
if(c == nil){
closedev:
alcCloseDevice(dev); ALERR();
dev = nil;
return -1;
}
ctx = c;
e = alcMakeContextCurrent(c); ALERR();
if(!e){
ctx = nil;
alcDestroyContext(c); ALERR();
goto closedev;
}
alListenerf(AL_GAIN, volume.value); ALERR();
alDistanceModel(AL_LINEAR_DISTANCE_CLAMPED); ALERR();
// assuming 64 Quake units is ~1.7m
alSpeedOfSound(343.3 * 64.0 / 1.7); ALERR();
alDopplerFactor(s_al_doppler_factor.value); ALERR();
if(alIsExtensionPresent("AL_SOFT_source_resampler")){
al_default_resampler = alGetInteger(AL_DEFAULT_RESAMPLER_SOFT);
if(ALERR())
al_default_resampler = 0;
al_num_resamplers = alGetInteger(AL_NUM_RESAMPLERS_SOFT);
if(ALERR())
al_num_resamplers = 0;
qalGetStringiSOFT = alGetProcAddress("alGetStringiSOFT");
}else{
qalGetStringiSOFT = nil;
}
qalBufferCallbackSOFT = nil;
if(alIsExtensionPresent("AL_SOFT_callback_buffer") && (alGenSources(1, &track.src), !ALERR())){
alSourcei(track.src, AL_SOURCE_SPATIALIZE_SOFT, AL_FALSE); ALERR();
qalBufferCallbackSOFT = alGetProcAddress("alBufferCallbackSOFT");
alGenBuffers(1, &track.buf); ALERR();
}
return 0;
}
static void
alreinit(const char *def, const char *all)
{
const char *s;
int i, n;
bool hrtf;
n = s_al_dev.value;
if(qalcReopenDeviceSOFT == nil && alcIsExtensionPresent(nil, "ALC_SOFT_reopen_device"))
qalcReopenDeviceSOFT = alGetProcAddress("alcReopenDeviceSOFT");
if(qalcReopenDeviceSOFT == nil){
Con_Printf("AL: can't change device settings on the fly\n");
return;
}
for(i = 1, s = all; s != nil && *s; i++){
if((n == 0 && def != nil && strcmp(s, def) == 0) || n == i){
if(dev == nil)
n = alinit(all);
else{
n = qalcReopenDeviceSOFT(dev, s, alcattr(false)) ? 0 : -1;
ALERR();
}
if(n != 0){
Con_Printf("AL: failed to switch to %s\n", s);
return;
}
break;
}
s += strlen(s)+1;
}
if(s == nil || !*s){
Con_Printf("AL: no such device: %d\n", n);
return;
}
if(alcIsExtensionPresent(dev, "ALC_SOFT_HRTF")){
qalcGetStringiSOFT = alcGetProcAddress(dev, "alcGetStringiSOFT");
qalcResetDeviceSOFT = alcGetProcAddress(dev, "alcResetDeviceSOFT");
hrtf = true;
}else{
qalcGetStringiSOFT = nil;
qalcResetDeviceSOFT = nil;
hrtf = false;
}
if(qalcResetDeviceSOFT != nil){
qalcResetDeviceSOFT(dev, alcattr(hrtf));
ALERR();
}
}
static void
alvarcb(cvar_t *var)
{
const char *all, *def, *s;
int i, n;
def = alcGetString(nil, ALC_DEFAULT_ALL_DEVICES_SPECIFIER);
if(ALERR())
def = nil;
all = alcGetString(nil, ALC_ALL_DEVICES_SPECIFIER);
if(ALERR())
all = nil;
if(var == &s_al_dev && Cmd_Argc() == 1){
Con_Printf("%-2d: default (%s)\n", 0, def ? def : "<invalid>");
for(i = 1, s = all; s != nil && *s; i++){
Con_Printf("%-2d: %s%s\n", i, s, strcmp(s, def) == 0 ? " (default)" : "");
s += strlen(s)+1;
}
return;
}
alreinit(def, all);
if(var == &s_al_hrtf && Cmd_Argc() == 1){
Con_Printf("%-2d: disabled\n", -1);
Con_Printf("%-2d: don't care (default)\n", 0);
if(qalcGetStringiSOFT == nil)
return;
alcGetIntegerv(dev, ALC_NUM_HRTF_SPECIFIERS_SOFT, 1, &n); ALERR();
for(i = 0; i < n; i++){
s = qalcGetStringiSOFT(dev, ALC_HRTF_SPECIFIER_SOFT, i);
if(!ALERR() && s != nil)
Con_Printf("%-2d: %s\n", i+1, s);
}
}
}
static void
aldopplercb(cvar_t *var)
{
alDopplerFactor(var->value); ALERR();
}
static void
sfxlist(void)
{
int sz, sum, w, ch;
Sfx *sfx, *e;
albuf_t *b;
sum = 0;
for(sfx = known_sfx, e = known_sfx+num_sfx; sfx < e; sfx++){
if((b = Cache_Check(&sfx->cu)) == nil)
continue;
alGetBufferi(b->buf, AL_SIZE, &sz); ALERR();
alGetBufferi(b->buf, AL_CHANNELS, &ch); ALERR();
alGetBufferi(b->buf, AL_BITS, &w); ALERR();
sum += sz * ch * w/8;
Con_Printf("%c(%2db) %6d : %s\n", b->loop ? 'L' : ' ', w, sz, sfx->s);
}
Con_Printf("Total resident: %d\n", sum);
}
void
sfxbegin(void)
{
map++;
}
void
sfxend(void)
{
albuf_t *b;
Sfx *sfx;
int i;
if(dev == nil)
return;
ambsfx[Ambwater] = precachesfx("ambience/water1.wav");
ambsfx[Ambsky] = precachesfx("ambience/wind2.wav");
for(i = 0, sfx = known_sfx; i < num_sfx; i++, sfx++){
if(sfx->map >= map || sfx == ambsfx[Ambsky] || sfx == ambsfx[Ambwater])
continue;
if((b = Cache_Check(&sfx->cu)) != nil){
alDeleteBuffers(1, &b->buf); ALERR();
Cache_Free(&sfx->cu);
}
}
}
void
stepcd(void)
{
if(dev == nil || !cdenabled)
return;
if(track.stop)
stopcd();
else if(track.playing){
alSourcef(track.src, AL_GAIN, bgmvolume.value);
ALERR();
}
}
static ALsizei
trackcb(ALvoid *aux, ALvoid *sampledata, ALsizei numbytes)
{
ssize_t n;
byte *b;
USED(aux);
for(b = sampledata; numbytes > 0; b += n, numbytes -= n){
if((n = read(track.pcm, b, numbytes)) <= 0){
track.stop = true;
return 0;
}
}
return b - (byte*)sampledata;
}
static void *
trackdecoder(void *f)
{
byte b[65536];
ssize_t n;
fpos_t off;
int left;
if(fgetpos(f, &off) == 0){
left = track.len;
for(;;){
if((n = fread(b, 1, min(left, (int)sizeof(b)), f)) < 1){
if(ferror(f)){
perror("fread");
break;
}
}
if(write(track.dec, b, n) != n)
break;
left -= n;
if(left < 1){
if(!cdloop)
break;
if(fsetpos(f, &off) != 0){
perror("fsetpos");
break;
}
left = track.len;
}
}
}
track.stop = true;
waitpid(track.decoder, nil, 0);
return nil;
}
void
playcd(int nt, bool loop)
{
int s[2], in[2];
pid_t pid;
FILE *f;
if(dev == nil || !cdenabled)
return;
stopcd();
if(qalBufferCallbackSOFT == nil)
return;
if((f = openlmp(va("music/track%02d.ogg", nt), &track.len)) == nil){
if((f = openlmp(va("music/track%02d.mp3", nt), &track.len)) == nil)
f = openlmp(va("music/track%02d.wav", nt), &track.len);
}
if(f == nil)
return;
track.decoder = -1;
track.reader = -1;
if(pipe(s) != 0){
err:
close(track.pcm);
close(track.dec);
if(track.decoder > 0)
waitpid(track.decoder, nil, 0);
if(track.reader > 0)
pthread_join(track.reader, nil);
return;
}
if(pipe(in) != 0){
close(s[0]);
close(s[1]);
goto err;
}
switch((pid = fork())){
case 0:
close(s[1]); dup2(s[0], 0);
close(in[0]); dup2(in[1], 1);
close(s[0]);
execl(
"/usr/bin/env", "/usr/bin/env",
"ffmpeg",
"-loglevel", "fatal",
"-i", "-",
"-acodec", "pcm_s16le",
"-f", "s16le",
"-ac", "2",
"-ar", "44100",
"-",
nil
);
perror("execl ffmpeg"); // FIXME(sigrid): add and use Con_Errorf?
exit(1);
case -1:
goto err;
}
track.decoder = pid;
track.dec = s[1]; close(s[0]);
track.pcm = in[0]; close(in[1]);
cdloop = loop;
cdtrk = nt;
if(pthread_create(&track.reader, nil, trackdecoder, f) != 0)
goto err;
qalBufferCallbackSOFT(track.buf, AL_FORMAT_STEREO16, 44100, trackcb, nil);
if(ALERR())
goto err;
track.playing = true;
track.stop = false;
alSourcei(track.src, AL_BUFFER, track.buf); ALERR();
alSourcePlay(track.src); ALERR();
}
void
resumecd(void)
{
if(track.playing){
alSourcePlay(track.src);
ALERR();
}
}
void
pausecd(void)
{
if(track.playing){
alSourcePause(track.src);
ALERR();
}
}
int
initcd(void)
{
cdntrk = cdtrk = 0;
cdloop = false;
return 0;
}
void
stopcd(void)
{
if(track.playing){
alSourceStop(track.src); ALERR();
alSourcei(track.src, AL_BUFFER, 0); ALERR();
close(track.dec);
close(track.pcm);
pthread_join(track.reader, nil);
}
track.dec = -1;
track.pcm = -1;
track.playing = false;
track.stop = false;
}
void
shutcd(void)
{
stopcd();
}
int
initsnd(void)
{
Cvar_RegisterVariable(&volume);
Cvar_RegisterVariable(&bgmvolume);
Cvar_RegisterVariable(&ambient_level);
Cvar_RegisterVariable(&ambient_fade);
Cvar_RegisterVariable(&s_al_dev);
Cvar_RegisterVariable(&s_al_resampler_default);
Cvar_RegisterVariable(&s_al_resampler_up);
Cvar_RegisterVariable(&s_al_hrtf);
Cvar_RegisterVariable(&s_al_doppler_factor);
Cmd_AddCommand("stopsound", stopallsfx);
Cmd_AddCommand("soundlist", sfxlist);
Cmd_AddCommand("cd", cdcmd);
if(!isdisabled("snd")){
s_al_dev.cb = s_al_hrtf.cb = alvarcb;
s_al_doppler_factor.cb = aldopplercb;
alinit(nil);
known_sfx = Hunk_Alloc(MAX_SOUNDS * sizeof *known_sfx);
num_sfx = 0;
cdenabled = !isdisabled("cd");
}
return 0;
}
void
sndclose(void)
{
if(dev == nil)
return;
alcDestroyContext(ctx); ctx = nil; ALERR();
alcCloseDevice(dev); dev = nil; ALERR();
}