IntHalfbandFilterEO2< HBFilterOrder > Class Template Reference

#include <inthalfbandfiltereo2.h>

Public Member Functions
	IntHalfbandFilterEO2 ()
bool	workDecimateCenter (Sample *sample)
bool	workInterpolateCenterZeroStuffing (Sample *sampleIn, Sample *SampleOut)
bool	workInterpolateCenter (Sample *sampleIn, Sample *SampleOut)
bool	workDecimateCenter (int32_t *x, int32_t *y)
bool	workDecimateLowerHalf (Sample *sample)
bool	workInterpolateLowerHalfZeroStuffing (Sample *sampleIn, Sample *sampleOut)
bool	workInterpolateLowerHalf (Sample *sampleIn, Sample *sampleOut)
bool	workDecimateUpperHalf (Sample *sample)
bool	workInterpolateUpperHalfZeroStuffing (Sample *sampleIn, Sample *sampleOut)
bool	workInterpolateUpperHalf (Sample *sampleIn, Sample *sampleOut)
void	myDecimate (const Sample *sample1, Sample *sample2)
void	myDecimate (int32_t x1, int32_t y1, int32_t *x2, int32_t *y2)
void	myInterpolateZeroStuffing (Sample *sample1, Sample *sample2)
void	myInterpolateZeroStuffing (int32_t *x1, int32_t *y1, int32_t *x2, int32_t *y2)
void	myInterpolate (qint32 *x1, qint32 *y1, qint32 *x2, qint32 *y2)
void	myInterpolateInf (qint32 *x1, qint32 *y1, qint32 *x2, qint32 *y2, qint32 *x3, qint32 *y3, qint32 *x4, qint32 *y4)
void	myInterpolateSup (qint32 *x1, qint32 *y1, qint32 *x2, qint32 *y2, qint32 *x3, qint32 *y3, qint32 *x4, qint32 *y4)

Protected Member Functions
void	storeSample (const FixReal &sampleI, const FixReal &sampleQ)
void	storeSample32 (int32_t x, int32_t y)
void	storeSample64 (qint64 x, qint64 y)
void	advancePointer ()
void	doFIR (Sample *sample)
void	doFIR (int32_t *x, int32_t *y)
void	doInterpolateFIR (Sample *sample)
void	doInterpolateFIR (qint32 *x, qint32 *y)

Protected Attributes
qint64	m_even [2][HBFIRFilterTraits< HBFilterOrder >::hbOrder]
qint64	m_odd [2][HBFIRFilterTraits< HBFilterOrder >::hbOrder]
int32_t	m_samples [HBFIRFilterTraits< HBFilterOrder >::hbOrder][2]
int	m_ptr
int	m_size
int	m_state

Detailed Description

template<uint32_t HBFilterOrder>
class IntHalfbandFilterEO2< HBFilterOrder >

Definition at line 33 of file inthalfbandfiltereo2.h.

Constructor & Destructor Documentation

IntHalfbandFilterEO2()

template<uint32_t HBFilterOrder>

IntHalfbandFilterEO2< HBFilterOrder >::IntHalfbandFilterEO2

(

)

Definition at line 847 of file inthalfbandfiltereo2.h.

References i.

{
    m_size = HBFIRFilterTraits<HBFilterOrder>::hbOrder/2;

    for (int i = 0; i < 2*m_size; i++)
    {
        m_even[0][i] = 0;
        m_even[1][i] = 0;
        m_odd[0][i] = 0;
        m_odd[1][i] = 0;
        m_samples[i][0] = 0;
        m_samples[i][1] = 0;
    }

    m_ptr = 0;
    m_state = 0;
}

Member Function Documentation

advancePointer()

template<uint32_t HBFilterOrder>

void IntHalfbandFilterEO2< HBFilterOrder >::advancePointer ( )

inlineprotected

Definition at line 719 of file inthalfbandfiltereo2.h.

    {
        m_ptr = m_ptr + 1 < 2*m_size ? m_ptr + 1: 0;
    }

doFIR() [1/2]

template<uint32_t HBFilterOrder>

void IntHalfbandFilterEO2< HBFilterOrder >::doFIR ( Sample *  sample )

inlineprotected

Definition at line 724 of file inthalfbandfiltereo2.h.

References i, Sample::setImag(), and Sample::setReal().

    {
        qint64 iAcc = 0;
        qint64 qAcc = 0;

        int a = m_ptr/2 + m_size; // tip pointer
        int b = m_ptr/2 + 1; // tail pointer
        for (int i = 0; i < HBFIRFilterTraits<HBFilterOrder>::hbOrder / 4; i++)
        {
            if ((m_ptr % 2) == 0)
            {
                iAcc += (m_even[0][a] + m_even[0][b]) * HBFIRFilterTraits<HBFilterOrder>::hbCoeffs[i];
                qAcc += (m_even[1][a] + m_even[1][b]) * HBFIRFilterTraits<HBFilterOrder>::hbCoeffs[i];
            }
            else
            {
                iAcc += (m_odd[0][a] + m_odd[0][b]) * HBFIRFilterTraits<HBFilterOrder>::hbCoeffs[i];
                qAcc += (m_odd[1][a] + m_odd[1][b]) * HBFIRFilterTraits<HBFilterOrder>::hbCoeffs[i];
            }

            a -= 1;
            b += 1;
        }

        if ((m_ptr % 2) == 0)
        {
            iAcc += ((int32_t)m_odd[0][m_ptr/2 + m_size/2]) << (HBFIRFilterTraits<HBFilterOrder>::hbShift - 1);
            qAcc += ((int32_t)m_odd[1][m_ptr/2 + m_size/2]) << (HBFIRFilterTraits<HBFilterOrder>::hbShift - 1);
        }
        else
        {
            iAcc += ((int32_t)m_even[0][m_ptr/2 + m_size/2 + 1]) << (HBFIRFilterTraits<HBFilterOrder>::hbShift - 1);
            qAcc += ((int32_t)m_even[1][m_ptr/2 + m_size/2 + 1]) << (HBFIRFilterTraits<HBFilterOrder>::hbShift - 1);
        }

        sample->setReal(iAcc >> (HBFIRFilterTraits<HBFilterOrder>::hbShift -1));
        sample->setImag(qAcc >> (HBFIRFilterTraits<HBFilterOrder>::hbShift -1));
    }

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doFIR() [2/2]

template<uint32_t HBFilterOrder>

void IntHalfbandFilterEO2< HBFilterOrder >::doFIR ( int32_t *  x, int32_t *  y  )

inlineprotected

Definition at line 763 of file inthalfbandfiltereo2.h.

References i.

    {
        qint64 iAcc = 0;
        qint64 qAcc = 0;

        int a = m_ptr/2 + m_size; // tip pointer
        int b = m_ptr/2 + 1; // tail pointer

        for (int i = 0; i < HBFIRFilterTraits<HBFilterOrder>::hbOrder / 4; i++)
        {
            if ((m_ptr % 2) == 0)
            {
                iAcc += (m_even[0][a] + m_even[0][b]) * HBFIRFilterTraits<HBFilterOrder>::hbCoeffs[i];
                qAcc += (m_even[1][a] + m_even[1][b]) * HBFIRFilterTraits<HBFilterOrder>::hbCoeffs[i];
            }
            else
            {
                iAcc += (m_odd[0][a] + m_odd[0][b]) * HBFIRFilterTraits<HBFilterOrder>::hbCoeffs[i];
                qAcc += (m_odd[1][a] + m_odd[1][b]) * HBFIRFilterTraits<HBFilterOrder>::hbCoeffs[i];
            }

            a -= 1;
            b += 1;
        }

        if ((m_ptr % 2) == 0)
        {
            iAcc += ((int32_t)m_odd[0][m_ptr/2 + m_size/2]) << (HBFIRFilterTraits<HBFilterOrder>::hbShift - 1);
            qAcc += ((int32_t)m_odd[1][m_ptr/2 + m_size/2]) << (HBFIRFilterTraits<HBFilterOrder>::hbShift - 1);
        }
        else
        {
            iAcc += ((int32_t)m_even[0][m_ptr/2 + m_size/2 + 1]) << (HBFIRFilterTraits<HBFilterOrder>::hbShift - 1);
            qAcc += ((int32_t)m_even[1][m_ptr/2 + m_size/2 + 1]) << (HBFIRFilterTraits<HBFilterOrder>::hbShift - 1);
        }

        *x = iAcc >> (HBFIRFilterTraits<HBFilterOrder>::hbShift -1); // HB_SHIFT incorrect do not loose the gained bit
        *y = qAcc >> (HBFIRFilterTraits<HBFilterOrder>::hbShift -1);
    }

doInterpolateFIR() [1/2]

template<uint32_t HBFilterOrder>

void IntHalfbandFilterEO2< HBFilterOrder >::doInterpolateFIR ( Sample *  sample )

inlineprotected

Definition at line 803 of file inthalfbandfiltereo2.h.

References i, Sample::setImag(), and Sample::setReal().

    {
        qint64 iAcc = 0;
        qint64 qAcc = 0;

        qint16 a = m_ptr;
        qint16 b = m_ptr + (HBFIRFilterTraits<HBFilterOrder>::hbOrder / 2) - 1;

        // go through samples in buffer
        for (int i = 0; i < HBFIRFilterTraits<HBFilterOrder>::hbOrder / 4; i++)
        {
            iAcc += (m_samples[a][0] + m_samples[b][0]) * HBFIRFilterTraits<HBFilterOrder>::hbCoeffs[i];
            qAcc += (m_samples[a][1] + m_samples[b][1]) * HBFIRFilterTraits<HBFilterOrder>::hbCoeffs[i];
            a++;
            b--;
        }

        sample->setReal(iAcc >> (HBFIRFilterTraits<HBFilterOrder>::hbShift -1));
        sample->setImag(qAcc >> (HBFIRFilterTraits<HBFilterOrder>::hbShift -1));
    }

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doInterpolateFIR() [2/2]

template<uint32_t HBFilterOrder>

void IntHalfbandFilterEO2< HBFilterOrder >::doInterpolateFIR ( qint32 *  x, qint32 *  y  )

inlineprotected

Definition at line 824 of file inthalfbandfiltereo2.h.

References i.

    {
        qint64 iAcc = 0;
        qint64 qAcc = 0;

        qint16 a = m_ptr;
        qint16 b = m_ptr + (HBFIRFilterTraits<HBFilterOrder>::hbOrder / 2) - 1;

        // go through samples in buffer
        for (int i = 0; i < HBFIRFilterTraits<HBFilterOrder>::hbOrder / 4; i++)
        {
            iAcc += (m_samples[a][0] + m_samples[b][0]) * HBFIRFilterTraits<HBFilterOrder>::hbCoeffs[i];
            qAcc += (m_samples[a][1] + m_samples[b][1]) * HBFIRFilterTraits<HBFilterOrder>::hbCoeffs[i];
            a++;
            b--;
        }

        *x = iAcc >> (HBFIRFilterTraits<HBFilterOrder>::hbShift -1);
        *y = qAcc >> (HBFIRFilterTraits<HBFilterOrder>::hbShift -1);
    }

myDecimate() [1/2]

template<uint32_t HBFilterOrder>

void IntHalfbandFilterEO2< HBFilterOrder >::myDecimate ( const Sample *  sample1, Sample *  sample2  )

inline

Definition at line 556 of file inthalfbandfiltereo2.h.

References Sample::imag(), and Sample::real().

    {
        storeSample((FixReal) sample1->real(), (FixReal) sample1->imag());
        advancePointer();

        storeSample((FixReal) sample2->real(), (FixReal) sample2->imag());
        doFIR(sample2);
        advancePointer();
    }

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myDecimate() [2/2]

template<uint32_t HBFilterOrder>

void IntHalfbandFilterEO2< HBFilterOrder >::myDecimate ( int32_t  x1, int32_t  y1, int32_t *  x2, int32_t *  y2  )

inline

Definition at line 566 of file inthalfbandfiltereo2.h.

    {
        storeSample32(x1, y1);
        advancePointer();

        storeSample32(*x2, *y2);
        doFIR(x2, y2);
        advancePointer();
    }

myInterpolate()

template<uint32_t HBFilterOrder>

void IntHalfbandFilterEO2< HBFilterOrder >::myInterpolate ( qint32 *  x1, qint32 *  y1, qint32 *  x2, qint32 *  y2  )

inline

Optimized upsampler by 2 not calculating FIR with inserted null samples

Definition at line 601 of file inthalfbandfiltereo2.h.

    {
        // insert sample into ring double buffer
        m_samples[m_ptr][0] = *x1;
        m_samples[m_ptr][1] = *y1;
        m_samples[m_ptr + HBFIRFilterTraits<HBFilterOrder>::hbOrder/2][0] = *x1;
        m_samples[m_ptr + HBFIRFilterTraits<HBFilterOrder>::hbOrder/2][1] = *y1;

        // advance pointer
        if (m_ptr < (HBFIRFilterTraits<HBFilterOrder>::hbOrder/2) - 1) {
            m_ptr++;
        } else {
            m_ptr = 0;
        }

        // first output sample calculated with the middle peak
        *x1 = m_samples[m_ptr + (HBFIRFilterTraits<HBFilterOrder>::hbOrder/4) - 1][0];
        *y1 = m_samples[m_ptr + (HBFIRFilterTraits<HBFilterOrder>::hbOrder/4) - 1][1];

        // second sample calculated with the filter
        doInterpolateFIR(x2, y2);
    }

myInterpolateInf()

template<uint32_t HBFilterOrder>

void IntHalfbandFilterEO2< HBFilterOrder >::myInterpolateInf ( qint32 *  x1, qint32 *  y1, qint32 *  x2, qint32 *  y2, qint32 *  x3, qint32 *  y3, qint32 *  x4, qint32 *  y4  )

inline

Definition at line 624 of file inthalfbandfiltereo2.h.

    {
        myInterpolate(x1, y1, x2, y2);
        myInterpolate(x3, y3, x4, y4);
        // rotation
        qint32 x;
        x = *x1;
        *x1 = *y1;
        *y1 = -x;
        *x2 = -*x2;
        *y2 = -*y2;
        x = *x3;
        *x3 = -*y3;
        *y3 = x;
    }

myInterpolateSup()

template<uint32_t HBFilterOrder>

void IntHalfbandFilterEO2< HBFilterOrder >::myInterpolateSup ( qint32 *  x1, qint32 *  y1, qint32 *  x2, qint32 *  y2, qint32 *  x3, qint32 *  y3, qint32 *  x4, qint32 *  y4  )

inline

Definition at line 640 of file inthalfbandfiltereo2.h.

    {
        myInterpolate(x1, y1, x2, y2);
        myInterpolate(x3, y3, x4, y4);
        // rotation
        qint32 x;
        x = *x1;
        *x1 = -*y1;
        *y1 = x;
        *x2 = -*x2;
        *y2 = -*y2;
        x = *x3;
        *x3 = *y3;
        *y3 = -x;
    }

myInterpolateZeroStuffing() [1/2]

template<uint32_t HBFilterOrder>

void IntHalfbandFilterEO2< HBFilterOrder >::myInterpolateZeroStuffing ( Sample *  sample1, Sample *  sample2  )

inline

Simple zero stuffing and filter

Definition at line 577 of file inthalfbandfiltereo2.h.

References Sample::imag(), and Sample::real().

    {
        storeSample((FixReal) sample1->real(), (FixReal) sample1->imag());
        doFIR(sample1);
        advancePointer();

        storeSample((FixReal) 0, (FixReal) 0);
        doFIR(sample2);
        advancePointer();
    }

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myInterpolateZeroStuffing() [2/2]

template<uint32_t HBFilterOrder>

void IntHalfbandFilterEO2< HBFilterOrder >::myInterpolateZeroStuffing ( int32_t *  x1, int32_t *  y1, int32_t *  x2, int32_t *  y2  )

inline

Simple zero stuffing and filter

Definition at line 589 of file inthalfbandfiltereo2.h.

    {
        storeSample32(*x1, *y1);
        doFIR(x1, y1);
        advancePointer();

        storeSample32(0, 0);
        doFIR(x2, y2);
        advancePointer();
    }

storeSample()

template<uint32_t HBFilterOrder>

void IntHalfbandFilterEO2< HBFilterOrder >::storeSample ( const FixReal &  sampleI, const FixReal &  sampleQ  )

inlineprotected

Definition at line 665 of file inthalfbandfiltereo2.h.

    {
        if ((m_ptr % 2) == 0)
        {
            m_even[0][m_ptr/2] = sampleI;
            m_even[1][m_ptr/2] = sampleQ;
            m_even[0][m_ptr/2 + m_size] = sampleI;
            m_even[1][m_ptr/2 + m_size] = sampleQ;
        }
        else
        {
            m_odd[0][m_ptr/2] = sampleI;
            m_odd[1][m_ptr/2] = sampleQ;
            m_odd[0][m_ptr/2 + m_size] = sampleI;
            m_odd[1][m_ptr/2 + m_size] = sampleQ;
        }
    }

storeSample32()

template<uint32_t HBFilterOrder>

void IntHalfbandFilterEO2< HBFilterOrder >::storeSample32 ( int32_t  x, int32_t  y  )

inlineprotected

Definition at line 683 of file inthalfbandfiltereo2.h.

    {
        if ((m_ptr % 2) == 0)
        {
            m_even[0][m_ptr/2] = x;
            m_even[1][m_ptr/2] = y;
            m_even[0][m_ptr/2 + m_size] = x;
            m_even[1][m_ptr/2 + m_size] = y;
        }
        else
        {
            m_odd[0][m_ptr/2] = x;
            m_odd[1][m_ptr/2] = y;
            m_odd[0][m_ptr/2 + m_size] = x;
            m_odd[1][m_ptr/2 + m_size] = y;
        }
    }

storeSample64()

template<uint32_t HBFilterOrder>

void IntHalfbandFilterEO2< HBFilterOrder >::storeSample64 ( qint64  x, qint64  y  )

inlineprotected

Definition at line 701 of file inthalfbandfiltereo2.h.

    {
        if ((m_ptr % 2) == 0)
        {
            m_even[0][m_ptr/2] = x;
            m_even[1][m_ptr/2] = y;
            m_even[0][m_ptr/2 + m_size] = x;
            m_even[1][m_ptr/2 + m_size] = y;
        }
        else
        {
            m_odd[0][m_ptr/2] = x;
            m_odd[1][m_ptr/2] = y;
            m_odd[0][m_ptr/2 + m_size] = x;
            m_odd[1][m_ptr/2 + m_size] = y;
        }
    }

workDecimateCenter() [1/2]

template<uint32_t HBFilterOrder>

bool IntHalfbandFilterEO2< HBFilterOrder >::workDecimateCenter ( Sample *  sample )

inline

Definition at line 38 of file inthalfbandfiltereo2.h.

References Sample::imag(), and Sample::real().

    {
        // insert sample into ring-buffer
        storeSample((FixReal) sample->real(), (FixReal) sample->imag());

        switch(m_state)
        {
            case 0:
                // advance write-pointer
                advancePointer();
                // next state
                m_state = 1;
                // tell caller we don't have a new sample
                return false;

            default:
                // save result
                doFIR(sample);
                // advance write-pointer
                advancePointer();
                // next state
                m_state = 0;

                // tell caller we have a new sample
                return true;
        }
    }

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workDecimateCenter() [2/2]

template<uint32_t HBFilterOrder>

bool IntHalfbandFilterEO2< HBFilterOrder >::workDecimateCenter ( int32_t *  x, int32_t *  y  )

inline

Definition at line 131 of file inthalfbandfiltereo2.h.

    {
        // insert sample into ring-buffer
        storeSample32(*x, *y);

        switch(m_state)
        {
            case 0:
                // advance write-pointer
                advancePointer();
                // next state
                m_state = 1;
                // tell caller we don't have a new sample
                return false;

            default:
                // save result
                doFIR(x, y);
                // advance write-pointer
                advancePointer();
                // next state
                m_state = 0;
                // tell caller we have a new sample
                return true;
        }
    }

workDecimateLowerHalf()

template<uint32_t HBFilterOrder>

bool IntHalfbandFilterEO2< HBFilterOrder >::workDecimateLowerHalf ( Sample *  sample )

inline

Definition at line 159 of file inthalfbandfiltereo2.h.

References Sample::imag(), and Sample::real().

    {
        switch(m_state)
        {
            case 0:
                // insert sample into ring-buffer
                storeSample((FixReal) -sample->imag(), (FixReal) sample->real());
                // advance write-pointer
                advancePointer();
                // next state
                m_state = 1;
                // tell caller we don't have a new sample
                return false;

            case 1:
                // insert sample into ring-buffer
                storeSample((FixReal) -sample->real(), (FixReal) -sample->imag());
                // save result
                doFIR(sample);
                // advance write-pointer
                advancePointer();
                // next state
                m_state = 2;
                // tell caller we have a new sample
                return true;

            case 2:
                // insert sample into ring-buffer
                storeSample((FixReal) sample->imag(), (FixReal) -sample->real());
                // advance write-pointer
                advancePointer();
                // next state
                m_state = 3;
                // tell caller we don't have a new sample
                return false;

            default:
                // insert sample into ring-buffer
                storeSample((FixReal) sample->real(), (FixReal) sample->imag());
                // save result
                doFIR(sample);
                // advance write-pointer
                advancePointer();
                // next state
                m_state = 0;
                // tell caller we have a new sample
                return true;
        }
    }

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workDecimateUpperHalf()

template<uint32_t HBFilterOrder>

bool IntHalfbandFilterEO2< HBFilterOrder >::workDecimateUpperHalf ( Sample *  sample )

inline

Definition at line 358 of file inthalfbandfiltereo2.h.

References Sample::imag(), and Sample::real().

    {
        switch(m_state)
        {
            case 0:
                // insert sample into ring-buffer
                storeSample((FixReal) sample->imag(), (FixReal) -sample->real());
                // advance write-pointer
                advancePointer();
                // next state
                m_state = 1;
                // tell caller we don't have a new sample
                return false;

            case 1:
                // insert sample into ring-buffer
                storeSample((FixReal) -sample->real(), (FixReal) -sample->imag());
                // save result
                doFIR(sample);
                // advance write-pointer
                advancePointer();
                // next state
                m_state = 2;
                // tell caller we have a new sample
                return true;

            case 2:
                // insert sample into ring-buffer
                storeSample((FixReal) -sample->imag(), (FixReal) sample->real());
                // advance write-pointer
                advancePointer();
                // next state
                m_state = 3;
                // tell caller we don't have a new sample
                return false;

            default:
                // insert sample into ring-buffer
                storeSample((FixReal) sample->real(), (FixReal) sample->imag());
                // save result
                doFIR(sample);
                // advance write-pointer
                advancePointer();
                // next state
                m_state = 0;
                // tell caller we have a new sample
                return true;
        }
    }

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workInterpolateCenter()

template<uint32_t HBFilterOrder>

bool IntHalfbandFilterEO2< HBFilterOrder >::workInterpolateCenter ( Sample *  sampleIn, Sample *  SampleOut  )

inline

Optimized upsampler by 2 not calculating FIR with inserted null samples

Definition at line 98 of file inthalfbandfiltereo2.h.

References Sample::imag(), Sample::real(), Sample::setImag(), and Sample::setReal().

    {
        switch(m_state)
        {
        case 0:
            // return the middle peak
            SampleOut->setReal(m_samples[m_ptr + (HBFIRFilterTraits<HBFilterOrder>::hbOrder/4) - 1][0]);
            SampleOut->setImag(m_samples[m_ptr + (HBFIRFilterTraits<HBFilterOrder>::hbOrder/4) - 1][1]);
            m_state = 1;  // next state
            return false; // tell caller we didn't consume the sample

        default:
            // calculate with non null samples
            doInterpolateFIR(SampleOut);

            // insert sample into ring double buffer
            m_samples[m_ptr][0] = sampleIn->real();
            m_samples[m_ptr][1] = sampleIn->imag();
            m_samples[m_ptr + HBFIRFilterTraits<HBFilterOrder>::hbOrder/2][0] = sampleIn->real();
            m_samples[m_ptr + HBFIRFilterTraits<HBFilterOrder>::hbOrder/2][1] = sampleIn->imag();

            // advance pointer
            if (m_ptr < (HBFIRFilterTraits<HBFilterOrder>::hbOrder/2) - 1) {
                m_ptr++;
            } else {
                m_ptr = 0;
            }

            m_state = 0; // next state
            return true; // tell caller we consumed the sample
        }
    }

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workInterpolateCenterZeroStuffing()

template<uint32_t HBFilterOrder>

bool IntHalfbandFilterEO2< HBFilterOrder >::workInterpolateCenterZeroStuffing ( Sample *  sampleIn, Sample *  SampleOut  )

inline

Definition at line 67 of file inthalfbandfiltereo2.h.

References Sample::imag(), and Sample::real().

    {
        switch(m_state)
        {
            case 0:
                // insert sample into ring-buffer
                storeSample((FixReal) 0, (FixReal) 0);
                // save result
                doFIR(SampleOut);
                // advance write-pointer
                advancePointer();
                // next state
                m_state = 1;
                // tell caller we didn't consume the sample
                return false;

            default:
                // insert sample into ring-buffer
                storeSample((FixReal) sampleIn->real(), (FixReal) sampleIn->imag());
                // save result
                doFIR(SampleOut);
                // advance write-pointer
                advancePointer();
                // next state
                m_state = 0;
                // tell caller we consumed the sample
                return true;
        }
    }

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workInterpolateLowerHalf()

template<uint32_t HBFilterOrder>

bool IntHalfbandFilterEO2< HBFilterOrder >::workInterpolateLowerHalf ( Sample *  sampleIn, Sample *  sampleOut  )

inline

Optimized upsampler by 2 not calculating FIR with inserted null samples

Definition at line 291 of file inthalfbandfiltereo2.h.

References Sample::imag(), Sample::real(), Sample::setImag(), and Sample::setReal().

    {
        Sample s;

        switch(m_state)
        {
        case 0:
            // return the middle peak
            sampleOut->setReal(m_samples[m_ptr + (HBFIRFilterTraits<HBFilterOrder>::hbOrder/4) - 1][1]);  // imag
            sampleOut->setImag(-m_samples[m_ptr + (HBFIRFilterTraits<HBFilterOrder>::hbOrder/4) - 1][0]); // - real
            m_state = 1;  // next state
            return false; // tell caller we didn't consume the sample

        case 1:
            // calculate with non null samples
            doInterpolateFIR(&s);
            sampleOut->setReal(-s.real());
            sampleOut->setImag(-s.imag());

            // insert sample into ring double buffer
            m_samples[m_ptr][0] = sampleIn->real();
            m_samples[m_ptr][1] = sampleIn->imag();
            m_samples[m_ptr + HBFIRFilterTraits<HBFilterOrder>::hbOrder/2][0] = sampleIn->real();
            m_samples[m_ptr + HBFIRFilterTraits<HBFilterOrder>::hbOrder/2][1] = sampleIn->imag();

            // advance pointer
            if (m_ptr < (HBFIRFilterTraits<HBFilterOrder>::hbOrder/2) - 1) {
                m_ptr++;
            } else {
                m_ptr = 0;
            }

            m_state = 2; // next state
            return true; // tell caller we consumed the sample

        case 2:
            // return the middle peak
            sampleOut->setReal(-m_samples[m_ptr + (HBFIRFilterTraits<HBFilterOrder>::hbOrder/4) - 1][1]);  // - imag
            sampleOut->setImag(m_samples[m_ptr + (HBFIRFilterTraits<HBFilterOrder>::hbOrder/4) - 1][0]); // real
            m_state = 3;  // next state
            return false; // tell caller we didn't consume the sample

        default:
            // calculate with non null samples
            doInterpolateFIR(&s);
            sampleOut->setReal(s.real());
            sampleOut->setImag(s.imag());

            // insert sample into ring double buffer
            m_samples[m_ptr][0] = sampleIn->real();
            m_samples[m_ptr][1] = sampleIn->imag();
            m_samples[m_ptr + HBFIRFilterTraits<HBFilterOrder>::hbOrder/2][0] = sampleIn->real();
            m_samples[m_ptr + HBFIRFilterTraits<HBFilterOrder>::hbOrder/2][1] = sampleIn->imag();

            // advance pointer
            if (m_ptr < (HBFIRFilterTraits<HBFilterOrder>::hbOrder/2) - 1) {
                m_ptr++;
            } else {
                m_ptr = 0;
            }

            m_state = 0; // next state
            return true; // tell caller we consumed the sample
        }
    }

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workInterpolateLowerHalfZeroStuffing()

template<uint32_t HBFilterOrder>

bool IntHalfbandFilterEO2< HBFilterOrder >::workInterpolateLowerHalfZeroStuffing ( Sample *  sampleIn, Sample *  sampleOut  )

inline

Definition at line 210 of file inthalfbandfiltereo2.h.

References Sample::imag(), Sample::real(), Sample::setImag(), and Sample::setReal().

    {
        Sample s;

        switch(m_state)
        {
        case 0:
            // insert sample into ring-buffer
            storeSample((FixReal) 0, (FixReal) 0);

            // save result
            doFIR(&s);
            sampleOut->setReal(s.imag());
            sampleOut->setImag(-s.real());

            // advance write-pointer
            advancePointer();

            // next state
            m_state = 1;

            // tell caller we didn't consume the sample
            return false;

        case 1:
            // insert sample into ring-buffer
            storeSample((FixReal) sampleIn->real(), (FixReal) sampleIn->imag());

            // save result
            doFIR(&s);
            sampleOut->setReal(-s.real());
            sampleOut->setImag(-s.imag());

            // advance write-pointer
            advancePointer();

            // next state
            m_state = 2;

            // tell caller we consumed the sample
            return true;

        case 2:
            // insert sample into ring-buffer
            storeSample((FixReal) 0, (FixReal) 0);

            // save result
            doFIR(&s);
            sampleOut->setReal(-s.imag());
            sampleOut->setImag(s.real());

            // advance write-pointer
            advancePointer();

            // next state
            m_state = 3;

            // tell caller we didn't consume the sample
            return false;

        default:
            // insert sample into ring-buffer
            storeSample((FixReal) sampleIn->real(), (FixReal) sampleIn->imag());

            // save result
            doFIR(&s);
            sampleOut->setReal(s.real());
            sampleOut->setImag(s.imag());

            // advance write-pointer
            advancePointer();

            // next state
            m_state = 0;

            // tell caller we consumed the sample
            return true;
        }
    }

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workInterpolateUpperHalf()

template<uint32_t HBFilterOrder>

bool IntHalfbandFilterEO2< HBFilterOrder >::workInterpolateUpperHalf ( Sample *  sampleIn, Sample *  sampleOut  )

inline

Optimized upsampler by 2 not calculating FIR with inserted null samples

Definition at line 490 of file inthalfbandfiltereo2.h.

References Sample::imag(), Sample::real(), Sample::setImag(), and Sample::setReal().

    {
        Sample s;

        switch(m_state)
        {
        case 0:
            // return the middle peak
            sampleOut->setReal(-m_samples[m_ptr + (HBFIRFilterTraits<HBFilterOrder>::hbOrder/4) - 1][1]); // - imag
            sampleOut->setImag(m_samples[m_ptr + (HBFIRFilterTraits<HBFilterOrder>::hbOrder/4) - 1][0]); // + real
            m_state = 1;  // next state
            return false; // tell caller we didn't consume the sample

        case 1:
            // calculate with non null samples
            doInterpolateFIR(&s);
            sampleOut->setReal(-s.real());
            sampleOut->setImag(-s.imag());

            // insert sample into ring double buffer
            m_samples[m_ptr][0] = sampleIn->real();
            m_samples[m_ptr][1] = sampleIn->imag();
            m_samples[m_ptr + HBFIRFilterTraits<HBFilterOrder>::hbOrder/2][0] = sampleIn->real();
            m_samples[m_ptr + HBFIRFilterTraits<HBFilterOrder>::hbOrder/2][1] = sampleIn->imag();

            // advance pointer
            if (m_ptr < (HBFIRFilterTraits<HBFilterOrder>::hbOrder/2) - 1) {
                m_ptr++;
            } else {
                m_ptr = 0;
            }

            m_state = 2; // next state
            return true; // tell caller we consumed the sample

        case 2:
            // return the middle peak
            sampleOut->setReal(m_samples[m_ptr + (HBFIRFilterTraits<HBFilterOrder>::hbOrder/4) - 1][1]);  // + imag
            sampleOut->setImag(-m_samples[m_ptr + (HBFIRFilterTraits<HBFilterOrder>::hbOrder/4) - 1][0]);   // - real
            m_state = 3;  // next state
            return false; // tell caller we didn't consume the sample

        default:
            // calculate with non null samples
            doInterpolateFIR(&s);
            sampleOut->setReal(s.real());
            sampleOut->setImag(s.imag());

            // insert sample into ring double buffer
            m_samples[m_ptr][0] = sampleIn->real();
            m_samples[m_ptr][1] = sampleIn->imag();
            m_samples[m_ptr + HBFIRFilterTraits<HBFilterOrder>::hbOrder/2][0] = sampleIn->real();
            m_samples[m_ptr + HBFIRFilterTraits<HBFilterOrder>::hbOrder/2][1] = sampleIn->imag();

            // advance pointer
            if (m_ptr < (HBFIRFilterTraits<HBFilterOrder>::hbOrder/2) - 1) {
                m_ptr++;
            } else {
                m_ptr = 0;
            }

            m_state = 0; // next state
            return true; // tell caller we consumed the sample
        }
    }

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workInterpolateUpperHalfZeroStuffing()

template<uint32_t HBFilterOrder>

bool IntHalfbandFilterEO2< HBFilterOrder >::workInterpolateUpperHalfZeroStuffing ( Sample *  sampleIn, Sample *  sampleOut  )

inline

Definition at line 409 of file inthalfbandfiltereo2.h.

References Sample::imag(), Sample::real(), Sample::setImag(), and Sample::setReal().

    {
        Sample s;

        switch(m_state)
        {
        case 0:
            // insert sample into ring-buffer
            storeSample((FixReal) 0, (FixReal) 0);

            // save result
            doFIR(&s);
            sampleOut->setReal(-s.imag());
            sampleOut->setImag(s.real());

            // advance write-pointer
            advancePointer();

            // next state
            m_state = 1;

            // tell caller we didn't consume the sample
            return false;

        case 1:
            // insert sample into ring-buffer
            storeSample((FixReal) sampleIn->real(), (FixReal) sampleIn->imag());

            // save result
            doFIR(&s);
            sampleOut->setReal(-s.real());
            sampleOut->setImag(-s.imag());

            // advance write-pointer
            advancePointer();

            // next state
            m_state = 2;

            // tell caller we consumed the sample
            return true;

        case 2:
            // insert sample into ring-buffer
            storeSample((FixReal) 0, (FixReal) 0);

            // save result
            doFIR(&s);
            sampleOut->setReal(s.imag());
            sampleOut->setImag(-s.real());

            // advance write-pointer
            advancePointer();

            // next state
            m_state = 3;

            // tell caller we didn't consume the sample
            return false;

        default:
            // insert sample into ring-buffer
            storeSample((FixReal) sampleIn->real(), (FixReal) sampleIn->imag());

            // save result
            doFIR(&s);
            sampleOut->setReal(s.real());
            sampleOut->setImag(s.imag());

            // advance write-pointer
            advancePointer();

            // next state
            m_state = 0;

            // tell caller we consumed the sample
            return true;
        }
    }

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Member Data Documentation

m_even

template<uint32_t HBFilterOrder>

qint64 IntHalfbandFilterEO2< HBFilterOrder >::m_even[2][HBFIRFilterTraits< HBFilterOrder >::hbOrder]

protected

Definition at line 657 of file inthalfbandfiltereo2.h.

m_odd

template<uint32_t HBFilterOrder>

qint64 IntHalfbandFilterEO2< HBFilterOrder >::m_odd[2][HBFIRFilterTraits< HBFilterOrder >::hbOrder]

protected

Definition at line 658 of file inthalfbandfiltereo2.h.

m_ptr

template<uint32_t HBFilterOrder>

int IntHalfbandFilterEO2< HBFilterOrder >::m_ptr

protected

Definition at line 661 of file inthalfbandfiltereo2.h.

m_samples

template<uint32_t HBFilterOrder>

int32_t IntHalfbandFilterEO2< HBFilterOrder >::m_samples[HBFIRFilterTraits< HBFilterOrder >::hbOrder][2]

protected

Definition at line 659 of file inthalfbandfiltereo2.h.

m_size

template<uint32_t HBFilterOrder>

int IntHalfbandFilterEO2< HBFilterOrder >::m_size

protected

Definition at line 662 of file inthalfbandfiltereo2.h.

m_state

template<uint32_t HBFilterOrder>

int IntHalfbandFilterEO2< HBFilterOrder >::m_state

protected

Definition at line 663 of file inthalfbandfiltereo2.h.

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

• sdrbase/dsp/inthalfbandfiltereo2.h