#help_index "Snd"
public U0 SndTaskEndCB()
{//Will turn-off snd when a task gets killed.
Snd;
Exit;
}
#help_index "Snd/Math;Math"
public F64 Saw(F64 t,F64 period)
{//Sawtooth. 0.0 - 1.0 think "(Sin+1)/2"
if (period) {
if (t>=0.0)
return t%period/period;
else
return 1.0+t%period/period;
} else
return 0.0;
}
public F64 FullSaw(F64 t,F64 period)
{//Plus&Minus Sawtooth. 1.0 - -1.0 think "Sin"
if (period) {
if (t>=0.0)
return 2.0*(t%period/period)-1.0;
else
return 2.0*(t%period/period)+1.0;
} else
return 0.0;
}
public F64 Caw(F64 t,F64 period)
{//Cawtooth. 1.0 - 0.0 think "(Cos+1)/2"
if (period) {
if (t>=0.0)
return 1.0-t%period/period;
else
return -(t%period)/period;
} else
return 1.0;
}
public F64 FullCaw(F64 t,F64 period)
{//Plus&Minus Cawtooth. 1.0 - -1.0 think "Cos"
if (period) {
if (t>=0.0)
return -2.0*(t%period/period)+1.0;
else
return -2.0*(t%period/period)-1.0;
} else
return 1.0;
}
public F64 Tri(F64 t,F64 period)
{//Triangle waveform. 0.0 - 1.0 - 0.0
if (period) {
t=2.0*(Abs(t)%period)/period;
if (t<=1.0)
return t;
else
return 2.0-t;
} else
return 0.0;
}
public F64 FullTri(F64 t,F64 period)
{//Plus&Minus Triangle waveform. 0.0 - 1.0 - 0.0 - -1.0 -0.0
if (period) {
t=4.0*(t%period)/period;
if (t<=-1.0) {
if (t<=-3.0)
return t+4.0;
else
return -2.0-t;
} else {
if (t<=1.0)
return t;
else if (t<=3.0)
return 2.0-t;
else
return t-4.0;
}
} else
return 0.0;
}
#help_index "Snd/Music"
public class CMusicGlbls
{
U8 *cur_song;
CTask *cur_song_task;
I64 octave;
F64 note_len;
U8 note_map[7];
Bool mute;
I64 meter_top,meter_bottom;
F64 tempo,stacatto_factor;
//If you wish to sync with a
//note in a Play() string. 0 is the start
I64 play_note_num;
F64 tM_correction,last_Beat,last_tM;
} music={NULL,NULL,4,1.0,{0,2,3,5,7,8,10},FALSE,4,4,2.5,0.9,0,0,0,0};
#help_index "Snd/Music;Time/Seconds"
public F64 tM()
{//Time in seconds synced to music subsystem.
return (cnts.jiffies+music.tM_correction)/JIFFY_FREQ;
}
public F64 Beat()
{//Time in music beats.
F64 res,cur_tM;
PUSHFD
CLI
if (mp_cnt>1)
while (LBts(&sys_semas[SEMA_TMBEAT],0))
PAUSE
cur_tM=tM;
res=music.last_Beat;
if (music.tempo)
res+=(cur_tM-music.last_tM)*music.tempo;
music.last_tM=cur_tM;
music.last_Beat=res;
LBtr(&sys_semas[SEMA_TMBEAT],0);
POPFD
return res;
}
#help_index "Snd/Music"
U8 *MusicSetOctave(U8 *st)
{
I64 ch;
ch=*st++;
while ('0'<=ch<='9') {
music.octave=ch-'0';
ch=*st++;
}
return --st;
}
U8 *MusicSetMeter(U8 *st)
{
I64 ch;
ch=*st++;
while (ch=='M') {
ch=*st++;
if ('0'<=ch<='9') {
music.meter_top=ch-'0';
ch=*st++;
}
if (ch=='/')
ch=*st++;
if ('0'<=ch<='9') {
music.meter_bottom=ch-'0';
ch=*st++;
}
}
return --st;
}
U8 *MusicSetNoteLen(U8 *st)
{
Bool cont=TRUE;
do {
switch (*st++) {
case 'w': music.note_len=4.0; break;
case 'h': music.note_len=2.0; break;
case 'q': music.note_len=1.0; break;
case 'e': music.note_len=0.5; break;
case 's': music.note_len=0.25; break;
case 't': music.note_len=2.0*music.note_len/3.0; break;
case '.': music.note_len=1.5*music.note_len; break;
default:
st--;
cont=FALSE;
}
} while (cont);
return st;
}
public I8 Note2Ona(I64 note,I64 octave=4)
{//Note to ona. Mid C is ona=51, note=3 and octave=4.
if (note<3)
return (octave+1)*12+note;
else
return octave*12+note;
}
public I8 Ona2Note(I8 ona)
{//Ona to note in octave. Mid C is ona=51, note=3 and octave=4.
return ona%12;
}
public I8 Ona2Octave(I8 ona)
{//Ona to octave. Mid C is ona=51, note=3 and octave=4.
I64 note=ona%12,octave=ona/12;
if (note<3)
return octave-1;
else
return octave;
}
public U0 Play(U8 *st,U8 *words=NULL)
{/* Notes are entered with a capital letter.
Octaves are entered with a digit and
stay set until changed. Mid C is octave 4.
Durations are entered with
'w' whole note
'h' half note
'q' quarter note
'e' eighth note
't' sets to 2/3rds the current duration
'.' sets to 1.5 times the current duration
durations stay set until changed.
'(' tie, placed before the note to be extended
music.meter_top,music.meter_bottom is set with
"M3/4"
"M4/4"
etc.
Sharp and flat are done with '#' or 'b'.
The var music.stacatto_factor can
be set to a range from 0.0 to 1.0.
The var music.tempo is quarter-notes
per second.It defaults to
2.5 and gets faster when bigger.
*/
U8 *word,*last_st;
I64 note,octave,i=0,ona,timeout_val,timeout_val2;
Bool tie;
F64 d,on_jiffies,off_jiffies;
music.play_note_num=0;
while (*st) {
timeout_val=cnts.jiffies;
tie=FALSE;
do {
last_st=st;
if (*st=='(') {
tie=TRUE;
st++;
} else {
st=MusicSetMeter(st);
st=MusicSetOctave(st);
st=MusicSetNoteLen(st);
}
} while (st!=last_st);
if (!*st) break;
note=*st++-'A';
if (note<7) {
note=music.note_map[note];
octave=music.octave;
if (*st=='b') {
note--;
if (note==2)
octave--;
st++;
} else if (*st=='#') {
note++;
if (note==3)
octave++;
st++;
}
ona=Note2Ona(note,octave);
} else
ona=0;
if (words && (word=LstSub(i++,words)) && StrCmp(word,""))
"%s",word;
d=JIFFY_FREQ*music.note_len/music.tempo;
on_jiffies =d*music.stacatto_factor;
off_jiffies =d*(1.0-music.stacatto_factor);
timeout_val+=on_jiffies;
timeout_val2=timeout_val+off_jiffies;
if (!music.mute)
Snd(ona);
SleepUntil(timeout_val);
music.tM_correction+=on_jiffies-ToI64(on_jiffies);
if (!music.mute && !tie)
Snd;
SleepUntil(timeout_val2);
music.tM_correction+=off_jiffies-ToI64(off_jiffies);
music.play_note_num++;
}
}
U0 MusicSettingsRst()
{
music.play_note_num=0;
music.stacatto_factor=0.9;
music.tempo=2.5;
music.octave=4;
music.note_len=1.0;
music.meter_top=4;
music.meter_bottom=4;
SndRst;
PUSHFD
CLI
if (mp_cnt>1)
while (LBts(&sys_semas[SEMA_TMBEAT],0))
PAUSE
music.last_tM=tM;
music.last_Beat=0.0;
LBtr(&sys_semas[SEMA_TMBEAT],0);
POPFD
}
MusicSettingsRst;
U0 CurSongTask()
{
Fs->task_end_cb=&SndTaskEndCB;
while (TRUE)
Play(music.cur_song);
}
#help_index "Snd"
#define SE_NOISE 0
#define SE_SWEEP 1
class CSoundEffectFrame
{
I32 type;
I8 ona1,ona2;
F64 duration;
};
U0 SoundEffectEndTaskCB()
{
Free(FramePtr("CSoundEffectFrame"));
music.mute--;
SndTaskEndCB;
}
U0 SoundEffectTask(CSoundEffectFrame *ns)
{
I64 i,ona;
F64 t0=tS,t,timeout=t0+ns->duration;
FramePtrAdd("CSoundEffectFrame",ns);
Fs->task_end_cb=&SoundEffectEndTaskCB;
switch (ns->type) {
case SE_NOISE:
i=MaxI64(ns->ona2-ns->ona1,1);
while (tS<timeout) {
ona=RandU16%i+ns->ona1;
Snd(ona);
t=Clamp(3000.0/Ona2Freq(ona),1.0,50.0);
if (t+tS>timeout)
t=timeout-tS;
Sleep(t);
}
break;
case SE_SWEEP:
while (tS<timeout) {
t=(tS-t0)/ns->duration;
ona=(1.0-t)*ns->ona1+t*ns->ona2;
Snd(ona);
t=Clamp(3000.0/Ona2Freq(ona),1.0,50.0);
if (t+tS>timeout)
t=timeout-tS;
Sleep(t);
}
break;
}
}
public CTask *Noise(I64 mS,F64 min_ona,F64 max_ona)
{//Make white noise for given number of mS.
CSoundEffectFrame *ns;
if (mS>0) {
ns=MAlloc(sizeof(CSoundEffectFrame));
ns->type=SE_NOISE;
ns->duration=mS/1000.0;
ns->ona1=min_ona;
ns->ona2=max_ona;
music.mute++;
return Spawn(&SoundEffectTask,ns,"Noise",,Fs);
} else
return NULL;
}
public CTask *Sweep(I64 mS,F64 ona1,F64 ona2)
{//Sweep through freq range in given number of mS.
CSoundEffectFrame *ns;
if (mS>0) {
ns=MAlloc(sizeof(CSoundEffectFrame));
ns->type=SE_SWEEP;
ns->duration=mS/1000.0;
ns->ona1=ona1;
ns->ona2=ona2;
music.mute++;
return Spawn(&SoundEffectTask,ns,"Noise",,Fs);
} else
return NULL;
}