Nsound::FilterDC Class Reference

#include <Nsound/FilterDC.h>

Public Member Functions
	FilterDC (const float64 &feedback_gain)
AudioStream	filter (const AudioStream &x)
Buffer	filter (const Buffer &x)
float64	filter (const float64 &x)

Protected Attributes
float64	feedback_gain_
float64	last_input_
float64	last_output_

Detailed Description

Definition at line 45 of file FilterDC.h.

Constructor & Destructor Documentation

FilterDC::FilterDC

(

const float64 &

feedback_gain

)

Definition at line 37 of file FilterDC.cc.

    :
    feedback_gain_(feedback_gain),
    last_input_(0.0),
    last_output_(0.0)
{
}

Member Function Documentation

AudioStream FilterDC::filter

(

const AudioStream &

x

)

Definition at line 47 of file FilterDC.cc.

References Nsound::AudioStream::getNChannels(), and Nsound::AudioStream::getSampleRate().

Referenced by filter(), and Nsound::Pluck::generate().

{
    uint32 n_channels = x.getNChannels();

    AudioStream y(x.getSampleRate(), n_channels);

    for(uint32 channel = 0; channel < n_channels; ++channel)
    {
        y[channel] = filter(x[channel]);
    }

    return y;
}

Buffer FilterDC::filter

(

const Buffer &

x

)

Definition at line 64 of file FilterDC.cc.

References filter(), and Nsound::Buffer::getLength().

{
    uint32 n_samples = x.getLength();

    Buffer y;

    for(uint32 n = 0; n < n_samples; ++n)
    {
        y << filter(x[n]);
    }

    return y;
}

float64 FilterDC::filter

(

const float64 &

x

)

Definition at line 80 of file FilterDC.cc.

References feedback_gain_, last_input_, and last_output_.

{
    float64 out = x - last_input_ + feedback_gain_ * last_output_;

    last_input_ = x;
    last_output_ = out;

    return out;
}

Member Data Documentation

float64 Nsound::FilterDC::feedback_gain_

protected

Definition at line 67 of file FilterDC.h.

Referenced by filter().

float64 Nsound::FilterDC::last_input_

protected

Definition at line 68 of file FilterDC.h.

Referenced by filter().

float64 Nsound::FilterDC::last_output_

protected

Definition at line 69 of file FilterDC.h.

Referenced by filter().

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

• Nsound/FilterDC.h
• Nsound/FilterDC.cc