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Processing
Generators
WaveGenerator.hxx
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/*
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* Copyright (c) 2001-2004 MUSIC TECHNOLOGY GROUP (MTG)
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* UNIVERSITAT POMPEU FABRA
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*
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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*/
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#ifndef _WAVE_GENERATOR_H
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#define _WAVE_GENERATOR_H
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#include "
Audio.hxx
"
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#include "
Processing.hxx
"
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#include "
AudioOutPort.hxx
"
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#include "
Enum.hxx
"
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namespace
CLAM {
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class
EWaveType
:
public
Enum
{
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public
:
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EWaveType
() :
Enum
(
ValueTable
(),
eSine
) {}
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EWaveType
(
tValue
v) :
Enum
(
ValueTable
(), v) {};
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EWaveType
(std::string s) :
Enum
(
ValueTable
(), s) {};
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typedef
enum
{
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eSine
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}
tEnum
;
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static
tEnumValue
*
ValueTable
()
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{
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static
tEnumValue
sEnumValues[] = {
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{
EWaveType::eSine
,
"SineWave"
},
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{0,
NULL
}
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};
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return
sEnumValues;
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}
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virtual
Component
*
Species
()
const
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{
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return
(
Component
*)
new
EWaveType
(
eSine
);
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};
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};
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template
<
typename
WaveType >
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class
WaveFunctor
{
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public
:
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TData
operator()
(
TTime
x,
TData
amplitude);
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};
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class
WaveGeneratorConfig
:
public
ProcessingConfig
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{
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public
:
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DYNAMIC_TYPE_USING_INTERFACE
(
WaveGeneratorConfig
, 6,
ProcessingConfig
);
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DYN_ATTRIBUTE
(0,
public
,
EWaveType
, WaveType);
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DYN_ATTRIBUTE
(1,
public
,
TData
, Frequency);
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DYN_ATTRIBUTE
(2,
public
,
TData
, Amplitude);
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DYN_ATTRIBUTE
(3,
public
,
TData
, Phase);
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DYN_ATTRIBUTE
(4,
public
,
TData
, SampleRate);
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DYN_ATTRIBUTE
(5,
public
,
int
, FrameSize);
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protected
:
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void
DefaultInit
(
void
);
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};
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class
WaveGenerator
:
public
Processing
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{
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protected
:
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WaveGeneratorConfig
mConfig
;
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public
:
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// MRJ: Convenience type for template thingies to work
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class
EWaveType_eSine
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{
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};
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private
:
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TData
mAmplitude;
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TData
mXPos;
// Radians
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TData
mXDelta;
// Radians
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EWaveType::tValue
mType;
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const
char
*GetClassName()
const
{
return
"WaveGenerator"
;}
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bool
ConcreteConfigure(
const
ProcessingConfig
&);
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inline
TData
Sine(
TTime
pos);
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public
:
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inline
TData
GetXPos
()
const
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{
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return
mXPos;
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}
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inline
void
SetXPos
(
TData
new_value )
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{
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mXPos = new_value;
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}
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inline
TData
GetXDelta
()
const
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{
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return
mXDelta;
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}
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inline
void
SetXDelta
(
TData
new_value )
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{
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mXDelta = new_value;
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}
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inline
TData
GetAmplitude
()
const
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{
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return
mAmplitude;
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}
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OutPort<Audio>
Output
;
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WaveGenerator
();
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WaveGenerator
(
const
WaveGeneratorConfig
&c);
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virtual
~WaveGenerator
();
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const
ProcessingConfig
&
GetConfig
()
const
{
return
mConfig
;}
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bool
Do
(
void
);
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bool
Do
(
Audio
& in);
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private
:
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};
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template
<
typename
WaveType >
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void
FillBuffer
(
Array<TData>
&buffer,
WaveGenerator
& generator, WaveType* dummy = 0 )
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{
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TData
xvalue = generator.
GetXPos
();
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TData
xdelta = generator.
GetXDelta
();
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TData
amplitude = generator.
GetAmplitude
();
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int
i;
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WaveFunctor<WaveType>
func;
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int
size = buffer.
Size
();
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for
(i=0; i<size; i++) {
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buffer[i] = func( xvalue, amplitude);
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xvalue += xdelta;
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}
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if
(xvalue > 2.0 * M_PI)
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xvalue = fmod(xvalue,
TData
( 2.0 * M_PI ));
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generator.
SetXPos
( xvalue );
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}
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}
//namespace CLAM
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#endif // _WaveGenerator_
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