FFTWEngine Class Reference

#include <fftwengine.h>

Inheritance diagram for FFTWEngine:

Collaboration diagram for FFTWEngine:

Classes
struct	Plan

Public Member Functions
	FFTWEngine ()
	~FFTWEngine ()
void	configure (int n, bool inverse)
void	transform ()
Complex *	in ()
Complex *	out ()
Public Member Functions inherited from FFTEngine
virtual	~FFTEngine ()

Protected Types
typedef std::list< Plan * >	Plans

Protected Member Functions
void	freeAll ()

Protected Attributes
Plans	m_plans
Plan *	m_currentPlan

Static Protected Attributes
static QMutex	m_globalPlanMutex

Additional Inherited Members
Static Public Member Functions inherited from FFTEngine
static FFTEngine *	create ()

Detailed Description

Definition at line 10 of file fftwengine.h.

Member Typedef Documentation

Plans

typedef std::list<Plan*> FFTWEngine::Plans

protected

Definition at line 31 of file fftwengine.h.

Constructor & Destructor Documentation

FFTWEngine()

FFTWEngine::FFTWEngine

(

)

Definition at line 4 of file fftwengine.cpp.

                       :
    m_plans(),
    m_currentPlan(NULL)
{
}

~FFTWEngine()

FFTWEngine::~FFTWEngine

(

)

Definition at line 10 of file fftwengine.cpp.

References freeAll().

{
    freeAll();
}

Here is the call graph for this function:

Member Function Documentation

configure()

void FFTWEngine::configure ( int  n, bool  inverse  )

virtual

Implements FFTEngine.

Definition at line 15 of file fftwengine.cpp.

References FFTWEngine::Plan::in, FFTWEngine::Plan::inverse, m_currentPlan, m_globalPlanMutex, m_plans, FFTWEngine::Plan::n, FFTWEngine::Plan::out, and FFTWEngine::Plan::plan.

{
    for(Plans::const_iterator it = m_plans.begin(); it != m_plans.end(); ++it) {
        if(((*it)->n == n) && ((*it)->inverse == inverse)) {
            m_currentPlan = *it;
            return;
        }
    }

    m_currentPlan = new Plan;
    m_currentPlan->n = n;
    m_currentPlan->inverse = inverse;
    m_currentPlan->in = (fftwf_complex*)fftwf_malloc(sizeof(fftwf_complex) * n);
    m_currentPlan->out = (fftwf_complex*)fftwf_malloc(sizeof(fftwf_complex) * n);
    QTime t;
    t.start();
    m_globalPlanMutex.lock();
    m_currentPlan->plan = fftwf_plan_dft_1d(n, m_currentPlan->in, m_currentPlan->out, inverse ? FFTW_BACKWARD : FFTW_FORWARD, FFTW_PATIENT);
    m_globalPlanMutex.unlock();
    qDebug("FFT: creating FFTW plan (n=%d,%s) took %dms", n, inverse ? "inverse" : "forward", t.elapsed());
    m_plans.push_back(m_currentPlan);
}

freeAll()

void FFTWEngine::freeAll ( )

protected

Definition at line 60 of file fftwengine.cpp.

References m_plans.

Referenced by ~FFTWEngine().

{
    for(Plans::iterator it = m_plans.begin(); it != m_plans.end(); ++it) {
        fftwf_destroy_plan((*it)->plan);
        fftwf_free((*it)->in);
        fftwf_free((*it)->out);
        delete *it;
    }
    m_plans.clear();
}

Here is the caller graph for this function:

in()

Complex * FFTWEngine::in ( )

virtual

Implements FFTEngine.

Definition at line 44 of file fftwengine.cpp.

References FFTWEngine::Plan::in, and m_currentPlan.

{
    if(m_currentPlan != NULL)
        return reinterpret_cast<Complex*>(m_currentPlan->in);
    else return NULL;
}

out()

Complex * FFTWEngine::out ( )

virtual

Implements FFTEngine.

Definition at line 51 of file fftwengine.cpp.

References m_currentPlan, m_globalPlanMutex, and FFTWEngine::Plan::out.

{
    if(m_currentPlan != NULL)
        return reinterpret_cast<Complex*>(m_currentPlan->out);
    else return NULL;
}

transform()

void FFTWEngine::transform ( )

virtual

Implements FFTEngine.

Definition at line 38 of file fftwengine.cpp.

References m_currentPlan, and FFTWEngine::Plan::plan.

{
    if(m_currentPlan != NULL)
        fftwf_execute(m_currentPlan->plan);
}

Member Data Documentation

m_currentPlan

Plan* FFTWEngine::m_currentPlan

protected

Definition at line 33 of file fftwengine.h.

Referenced by configure(), in(), out(), and transform().

m_globalPlanMutex

QMutex FFTWEngine::m_globalPlanMutex

staticprotected

Definition at line 22 of file fftwengine.h.

Referenced by configure(), and out().

m_plans

Plans FFTWEngine::m_plans

protected

Definition at line 32 of file fftwengine.h.

Referenced by configure(), and freeAll().

---

The documentation for this class was generated from the following files:

• sdrbase/dsp/fftwengine.h
• sdrbase/dsp/fftwengine.cpp