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ITADataSources
ITADataSources
Commit e5d15d59 authored by Dipl.-Ing. Jonas Stienen's avatar Dipl.-Ing. Jonas Stienen
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parent 6836aae1
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src/ITAStreamFunctionGenerator.cpp
View file @ e5d15d59
#include "ITAStreamFunctionGenerator.h"
#include "ITAStreamFunctionGenerator.h"
#include <ITAConstants.h>
#include <ITADataSourceRealization.h>
......@@ -13,28 +13,20 @@
#include <memory.h>
#endif
ITAStreamFunctionGenerator::ITAStreamFunctionGenerator(unsigned int uiChannels,
double dSamplerate,
unsigned int uiBlocklength,
int iSignalFunction,
double dFrequency,
float fAmplitude,
bool bPeriodic)
: ITADatasourceRealization(uiChannels, dSamplerate, uiBlocklength),
// Initial values
m_iFunction(iSignalFunction),
m_bPeriodic(bPeriodic),
m_bMuted(false),
m_fAmplitude(fAmplitude),
m_iSampleCount(0),
m_fPhase(0.0f)
{
assert(uiChannels > 0);
assert(dSamplerate > 0);
assert(uiBlocklength > 0);
SetFrequency(dFrequency);
ITAStreamFunctionGenerator::ITAStreamFunctionGenerator( unsigned int uiChannels, double dSamplerate, unsigned int uiBlocklength, int iSignalFunction, double dFrequency, float fAmplitude, bool bPeriodic )
: ITADatasourceRealization( uiChannels, dSamplerate, uiBlocklength ),
m_iFunction( iSignalFunction ),
m_bPeriodic( bPeriodic ),
m_bMuted( false ),
m_fAmplitude( fAmplitude ),
m_iSampleCount( 0 ),
m_fPhase( 0.0f )
{
assert( uiChannels > 0 );
assert( dSamplerate > 0 );
assert( uiBlocklength > 0 );
SetFrequency( dFrequency );
Reset();
}
......@@ -49,20 +41,20 @@ int ITAStreamFunctionGenerator::GetFunction() const
return m_iFunction;
}
void ITAStreamFunctionGenerator::SetFunction(int iFunction)
void ITAStreamFunctionGenerator::SetFunction( int iFunction )
{
m_iFunction = iFunction;
}
double ITAStreamFunctionGenerator::GetFrequency() const
{
return m_dSampleRate / (double) m_iPeriodLengthSamples;
return m_dSampleRate / ( double ) m_iPeriodLengthSamples;
}
void ITAStreamFunctionGenerator::SetFrequency(double dFrequency)
void ITAStreamFunctionGenerator::SetFrequency( double dFrequency )
{
assert( dFrequency >= 0 );
m_iPeriodLengthSamples = (int) round( m_dSampleRate / dFrequency );
m_iPeriodLengthSamples = ( int ) round( m_dSampleRate / dFrequency );
}
int ITAStreamFunctionGenerator::GetPeriodAsSamples() const
......@@ -70,7 +62,7 @@ int ITAStreamFunctionGenerator::GetPeriodAsSamples() const
return m_iPeriodLengthSamples;
}
void ITAStreamFunctionGenerator::SetPeriodAsSamples(int iNumSamples)
void ITAStreamFunctionGenerator::SetPeriodAsSamples( int iNumSamples )
{
assert( iNumSamples >= 0 );
m_iPeriodLengthSamples = iNumSamples;
......@@ -78,12 +70,12 @@ void ITAStreamFunctionGenerator::SetPeriodAsSamples(int iNumSamples)
double ITAStreamFunctionGenerator::GetPeriodAsTime() const
{
return (double) m_iPeriodLengthSamples / m_dSampleRate;
return ( double ) m_iPeriodLengthSamples / m_dSampleRate;
}
void ITAStreamFunctionGenerator::SetPeriodAsTime(double dPeriodLength)
void ITAStreamFunctionGenerator::SetPeriodAsTime( double dPeriodLength )
{
m_iPeriodLengthSamples = (int) round(dPeriodLength * m_dSampleRate);
m_iPeriodLengthSamples = ( int ) round( dPeriodLength * m_dSampleRate );
}
bool ITAStreamFunctionGenerator::IsPeriodic() const
......@@ -91,7 +83,7 @@ bool ITAStreamFunctionGenerator::IsPeriodic() const
return m_bPeriodic;
}
void ITAStreamFunctionGenerator::SetPeriodic(bool bPeriodic)
void ITAStreamFunctionGenerator::SetPeriodic( bool bPeriodic )
{
m_bPeriodic = bPeriodic;
}
......@@ -101,7 +93,7 @@ bool ITAStreamFunctionGenerator::IsMuted() const
return m_bMuted;
}
void ITAStreamFunctionGenerator::SetMuted(bool bMuted)
void ITAStreamFunctionGenerator::SetMuted( bool bMuted )
{
m_bMuted = bMuted;
}
......@@ -111,112 +103,115 @@ float ITAStreamFunctionGenerator::GetAmplitude() const
return m_fAmplitude;
}
void ITAStreamFunctionGenerator::SetAmplitude(float fAmplitude)
void ITAStreamFunctionGenerator::SetAmplitude( float fAmplitude )
{
m_fAmplitude = (float) fAmplitude;
m_fAmplitude = ( float ) fAmplitude;
}
void ITAStreamFunctionGenerator::ProcessStream(const ITAStreamInfo* pStreamInfo)
void ITAStreamFunctionGenerator::ProcessStream( const ITAStreamInfo* )
{
// Generate the next output samples
float* pfOutputData = GetWritePointer(0);
fm_zero(pfOutputData, m_uiBlocklength);
float* pfOutputData = GetWritePointer( 0 );
fm_zero( pfOutputData, m_uiBlocklength );
// Variables
int N = m_iPeriodLengthSamples;
float a = m_fAmplitude;
float omega;
float gradient = a / (float) (N-1); // Steigung der Sgezahn und Dreieck
float gradient = a / ( float ) ( N - 1 ); // Steigung der Sgezahn und Dreieck
int iZero; // Offset bergang 1=>0 bei Rechteck
int iNumSamples; // Anzahl zu erzeugender Samples
switch (m_iFunction) {
switch( m_iFunction ) {
case SINE:
omega = ITAConstants::TWO_PI_F / (float) N; // 2*pi/T
iNumSamples = m_bPeriodic ? (int) m_uiBlocklength : (std::min)( (int) m_uiBlocklength, m_iPeriodLengthSamples - m_iSampleCount);
omega = ITAConstants::TWO_PI_F / ( float ) N; // 2*pi/T
iNumSamples = m_bPeriodic ? ( int ) m_uiBlocklength : ( std::min )( ( int ) m_uiBlocklength, m_iPeriodLengthSamples - m_iSampleCount );
for (int i=0;i<iNumSamples;i++) {
pfOutputData[i] = a * sin(omega*i + m_fPhase);
for( int i = 0; i < iNumSamples; i++ ) {
pfOutputData[ i ] = a * sin( omega*i + m_fPhase );
}
m_fPhase = fmodf( iNumSamples*omega + m_fPhase, ITAConstants::TWO_PI_F );
m_iSampleCount += iNumSamples;
break;
case TRIANGLE:
iNumSamples = (m_bPeriodic ? (int)m_uiBlocklength : (std::min)( (int)m_uiBlocklength, m_iPeriodLengthSamples - m_iSampleCount) );
iNumSamples = ( m_bPeriodic ? ( int ) m_uiBlocklength : ( std::min )( ( int ) m_uiBlocklength, m_iPeriodLengthSamples - m_iSampleCount ) );
for (int i=0;i<iNumSamples;i++) {
float x = fmodf((float) m_iSampleCount++, (float) m_iPeriodLengthSamples);
for( int i = 0; i < iNumSamples; i++ )
{
float x = fmodf( ( float ) m_iSampleCount++, ( float ) m_iPeriodLengthSamples );
pfOutputData[i] = x < N/2 ? 2*(x*gradient) : 2*((-x*gradient)+a);
pfOutputData[ i ] = x < N / 2 ? 2 * ( x*gradient ) : 2 * ( ( -x*gradient ) + a );
}
break;
case SAWTOOTH: // Sgezahn
iNumSamples = (m_bPeriodic ? (int) m_uiBlocklength : (std::min)( (int) m_uiBlocklength, m_iPeriodLengthSamples - m_iSampleCount) );
for (int i=0;i<iNumSamples;i++) {
iNumSamples = ( m_bPeriodic ? ( int ) m_uiBlocklength : ( std::min )( ( int ) m_uiBlocklength, m_iPeriodLengthSamples - m_iSampleCount ) );
float x = fmodf((float) m_iSampleCount++, (float) m_iPeriodLengthSamples);
pfOutputData[i] = a * (x*gradient);
for( int i = 0; i < iNumSamples; i++ ) {
float x = fmodf( ( float ) m_iSampleCount++, ( float ) m_iPeriodLengthSamples );
pfOutputData[ i ] = a * ( x*gradient );
}
break;
case RECTANGLE:
// Position des Wechsels von 1 zu 0 innerhalb einer Periode
iZero = (int)(m_iPeriodLengthSamples / 2);
iNumSamples = (m_bPeriodic ? (int) m_uiBlocklength : (std::min)((int) m_uiBlocklength, m_iPeriodLengthSamples - m_iSampleCount) );
// Position des Wechsels von 1 zu 0 innerhalb einer Periode
iZero = ( int ) ( m_iPeriodLengthSamples / 2 );
iNumSamples = ( m_bPeriodic ? ( int ) m_uiBlocklength : ( std::min )( ( int ) m_uiBlocklength, m_iPeriodLengthSamples - m_iSampleCount ) );
for (int i=0; i<iNumSamples; i++)
{
// Position innerhalb einer Periodenlnge
float x = fmodf((float) m_iSampleCount++, (float) m_iPeriodLengthSamples);
int iOffset = (int) roundf(x);
pfOutputData[i] = (iOffset < iZero ? a : 0);
}
for( int i = 0; i < iNumSamples; i++ )
{
// Position innerhalb einer Periodenlnge
float x = fmodf( ( float ) m_iSampleCount++, ( float ) m_iPeriodLengthSamples );
int iOffset = ( int ) roundf( x );
pfOutputData[ i ] = ( iOffset < iZero ? a : 0 );
}
break;
break;
case DIRAC:
iNumSamples = (m_bPeriodic ? (int) m_uiBlocklength : (std::min)( (int) m_uiBlocklength, m_iPeriodLengthSamples - m_iSampleCount ) );
if (m_bPeriodic) {
for (int i=0;i<iNumSamples;i++) pfOutputData[i] = ( m_iSampleCount++ % N ? 0 : a );
} else {
pfOutputData[0] = (m_iSampleCount == 0 ? a : 0);
for (int i=1;i<iNumSamples;i++) pfOutputData[i] = 0;
iNumSamples = ( m_bPeriodic ? ( int ) m_uiBlocklength : ( std::min )( ( int ) m_uiBlocklength, m_iPeriodLengthSamples - m_iSampleCount ) );
if( m_bPeriodic )
{
for( int i = 0; i < iNumSamples; i++ ) pfOutputData[ i ] = ( m_iSampleCount++ % N ? 0 : a );
}
else {
pfOutputData[ 0 ] = ( m_iSampleCount == 0 ? a : 0 );
for( int i = 1; i < iNumSamples; i++ ) pfOutputData[ i ] = 0;
m_iSampleCount += iNumSamples;
}
break;
case WHITE_NOISE:
case WHITE_NOISE:
srand( 100 );
for( unsigned int i = 0; i < m_uiBlocklength; i++ )
pfOutputData[ i ] = a * ( float ) rand() / RAND_MAX;
srand(100);
for(unsigned int i= 0; i< m_uiBlocklength; i++)
pfOutputData[i] = a * (float)rand()/ RAND_MAX;
break;
// ...
break;
// ...
default:
// Case: Invalid signal function => Generate zeros
for (unsigned int i=0; i<m_uiBlocklength; i++)
pfOutputData[i] = 0;
for( unsigned int i = 0; i < m_uiBlocklength; i++ )
pfOutputData[ i ] = 0;
}
/*
......@@ -225,9 +220,9 @@ void ITAStreamFunctionGenerator::ProcessStream(const ITAStreamInfo* pStreamInfo)
* then copy the data into all further channels.
*/
for (unsigned int c=1; c<m_uiChannels; c++)
memcpy( GetWritePointer(c), pfOutputData, m_uiBlocklength * sizeof(float) );
for( unsigned int c = 1; c < m_uiChannels; c++ )
memcpy( GetWritePointer( c ), pfOutputData, m_uiBlocklength * sizeof( float ) );
IncrementWritePointer();
}
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