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TempleOSCD_140715.ISO

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Terry A. Davis authored and minexew committed 2018-09-08 21:46:09 +02:00
1 parent 7ef616a20e
commit 64f679eeb9
1095 files changed
+24814 -221011
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Adam/Snd/MathAudio.CPP
+11 -15
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@@ -1,6 +1,6 @@
#help_index "Snd/Math;Math"
public F64 Saw(F64 t,F64 period)
{ //0.0 - 1.0 think "(Sin+1)/2"
{//Sawtooth. 0.0 - 1.0 think "(Sin+1)/2"
if (period) {
if (t>=0.0)
return t%period/period;
@@ -11,7 +11,7 @@ public F64 Saw(F64 t,F64 period)
}
public F64 FullSaw(F64 t,F64 period)
{ //1.0 - -1.0 think "Sin"
{//Plus&Minus Sawtooth. 1.0 - -1.0 think "Sin"
if (period) {
if (t>=0.0)
return 2.0*(t%period/period)-1.0;
@@ -22,7 +22,7 @@ public F64 FullSaw(F64 t,F64 period)
}
public F64 Caw(F64 t,F64 period)
{ //1.0 - 0.0 think "(Cos+1)/2"
{//Cawtooth. 1.0 - 0.0 think "(Cos+1)/2"
if (period) {
if (t>=0.0)
return 1.0-t%period/period;
@@ -33,7 +33,7 @@ public F64 Caw(F64 t,F64 period)
}
public F64 FullCaw(F64 t,F64 period)
{ //1.0 - -1.0 think "Cos"
{//Plus&Minus Cawtooth. 1.0 - -1.0 think "Cos"
if (period) {
if (t>=0.0)
return -2.0*(t%period/period)+1.0;
@@ -44,7 +44,7 @@ public F64 FullCaw(F64 t,F64 period)
}
public F64 Tri(F64 t,F64 period)
{ //0.0 - 1.0 - 0.0
{//Triangle waveform. 0.0 - 1.0 - 0.0
if (period) {
t=2.0*(Abs(t)%period)/period;
if (t<=1.0)
@@ -55,9 +55,8 @@ public F64 Tri(F64 t,F64 period)
return 0.0;
}
public F64 FullTri(F64 t,F64 period)
{ //0.0 - 1.0 - 0.0 - -1.0 -0.0
{//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) {
@@ -79,14 +78,13 @@ public F64 FullTri(F64 t,F64 period)
#help_index "Snd/Math"
public F64 Note2Freq(I64 note,I64 octave=3)
{
{//Note number in octave to freq.
return 440.0*2.0`(octave-3+note/12.0);
}
F64 SinPhaseCont(F64 last_y,F64 last_dydt,
F64 current_amp,F64 phase_offset)
{
{//Next sample of sin waveform.
F64 phase;
phase=last_y/current_amp;
if (phase>1.0) phase=1.0;
@@ -100,7 +98,7 @@ F64 SinPhaseCont(F64 last_y,F64 last_dydt,
public CSndWaveCtrl *SndWaveCtrlNew(I64 sample_rate=8000,I64 sample_bits=24,
I64 channels=2,CTask *mem_task=NULL)
{
{//MAlloc ctrl struct for generating waveforms.
CSndWaveCtrl *swc=CAlloc(sizeof(CSndWaveCtrl),mem_task);
swc->freq_multiplier=1.0;
swc->amp_multiplier=1.0;
@@ -112,7 +110,7 @@ public CSndWaveCtrl *SndWaveCtrlNew(I64 sample_rate=8000,I64 sample_bits=24,
}
public U0 SndWaveCtrlDel(CSndWaveCtrl *swc)
{
{//Free waveform ctrl.
Free(swc);
}
@@ -126,7 +124,7 @@ public U0 SndWaveCtrlDel(CSndWaveCtrl *swc)
public U0 SndWaveAddBuf(CSndWaveCtrl *swc,U8 *buf,I64 num_samples,
F64 _freq,I64 _waveform=WF_SQUARE,F64 _amp=1.0,F64 _left=1.0, F64 _right=1.0)
{
{//Add waveform to buffer.
//num_samples is multiplied by channels to get buf_len.
//left,right range from 0.0-1.0
//Supports 16,24 and 32 bits
@@ -230,5 +228,3 @@ public U0 SndWaveAddBuf(CSndWaveCtrl *swc,U8 *buf,I64 num_samples,
swc->phase=phase;
}
}
#help_index "Snd"