A delay line processor featuring several algorithms for the fractional delay calculation, block processing, and sample-by-sample processing useful when modulating the delay in real time or creating a standard delay effect with feedback. More...
#include <juce_DelayLine.h>
Public Member Functions | |
DelayLine () | |
Default constructor. More... | |
DelayLine (int maximumDelayInSamples) | |
Constructor. More... | |
SampleType | getDelay () const |
Returns the current delay in samples. More... | |
int | getMaximumDelayInSamples () const noexcept |
Gets the maximum possible delay in samples. More... | |
SampleType | popSample (int channel, SampleType delayInSamples=-1, bool updateReadPointer=true) |
Pops a single sample from one channel of the delay line. More... | |
void | prepare (const ProcessSpec &spec) |
Initialises the processor. More... | |
template<typename ProcessContext > | |
void | process (const ProcessContext &context) noexcept |
Processes the input and output samples supplied in the processing context. More... | |
void | pushSample (int channel, SampleType sample) |
Pushes a single sample into one channel of the delay line. More... | |
void | reset () |
Resets the internal state variables of the processor. More... | |
void | setDelay (SampleType newDelayInSamples) |
Sets the delay in samples. More... | |
void | setMaximumDelayInSamples (int maxDelayInSamples) |
Sets a new maximum delay in samples. More... | |
Private Member Functions | |
template<typename T = InterpolationType> | |
std::enable_if< std::is_same< T, DelayLineInterpolationTypes::Thiran >::value, SampleType >::type | interpolateSample (int channel) |
template<typename T = InterpolationType> | |
std::enable_if< std::is_same< T, DelayLineInterpolationTypes::None >::value, SampleType >::type | interpolateSample (int channel) const |
template<typename T = InterpolationType> | |
std::enable_if< std::is_same< T, DelayLineInterpolationTypes::Linear >::value, SampleType >::type | interpolateSample (int channel) const |
template<typename T = InterpolationType> | |
std::enable_if< std::is_same< T, DelayLineInterpolationTypes::Lagrange3rd >::value, SampleType >::type | interpolateSample (int channel) const |
template<typename T = InterpolationType> | |
std::enable_if< std::is_same< T, DelayLineInterpolationTypes::None >::value, void >::type | updateInternalVariables () |
template<typename T = InterpolationType> | |
std::enable_if< std::is_same< T, DelayLineInterpolationTypes::Linear >::value, void >::type | updateInternalVariables () |
template<typename T = InterpolationType> | |
std::enable_if< std::is_same< T, DelayLineInterpolationTypes::Lagrange3rd >::value, void >::type | updateInternalVariables () |
template<typename T = InterpolationType> | |
std::enable_if< std::is_same< T, DelayLineInterpolationTypes::Thiran >::value, void >::type | updateInternalVariables () |
Private Attributes | |
SampleType | alpha = 0.0 |
AudioBuffer< SampleType > | bufferData |
SampleType | delay = 0.0 |
SampleType | delayFrac = 0.0 |
int | delayInt = 0 |
std::vector< int > | readPos |
double | sampleRate |
int | totalSize = 4 |
std::vector< SampleType > | v |
std::vector< int > | writePos |
A delay line processor featuring several algorithms for the fractional delay calculation, block processing, and sample-by-sample processing useful when modulating the delay in real time or creating a standard delay effect with feedback.
Note: If you intend to change the delay in real time, you may want to smooth changes to the delay systematically using either a ramp or a low-pass filter.
@tags{DSP}
juce::dsp::DelayLine< SampleType, InterpolationType >::DelayLine | ( | ) |
Default constructor.
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Constructor.
SampleType juce::dsp::DelayLine< SampleType, InterpolationType >::getDelay | ( | ) | const |
Returns the current delay in samples.
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Gets the maximum possible delay in samples.
For very short delay times, the result of getMaximumDelayInSamples() may differ from the last value passed to setMaximumDelayInSamples().
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SampleType juce::dsp::DelayLine< SampleType, InterpolationType >::popSample | ( | int | channel, |
SampleType | delayInSamples = -1 , |
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bool | updateReadPointer = true |
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Pops a single sample from one channel of the delay line.
Use this function to modulate the delay in real time or implement standard delay effects with feedback.
channel | the target channel for the delay line. |
delayInSamples | sets the wanted fractional delay in samples, or -1 to use the value being used before or set with setDelay function. |
updateReadPointer | should be set to true if you use the function once for each sample, or false if you need multi-tap delay capabilities. |
Referenced by juce::dsp::DelayLine< SampleType, juce::dsp::DelayLineInterpolationTypes::Thiran >::process().
void juce::dsp::DelayLine< SampleType, InterpolationType >::prepare | ( | const ProcessSpec & | spec | ) |
Initialises the processor.
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Processes the input and output samples supplied in the processing context.
Can be used for block processing when the delay is not going to change during processing. The delay must first be set by calling setDelay.
void juce::dsp::DelayLine< SampleType, InterpolationType >::pushSample | ( | int | channel, |
SampleType | sample | ||
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Pushes a single sample into one channel of the delay line.
Use this function and popSample instead of process if you need to modulate the delay in real time instead of using a fixed delay value, or if you want to code a delay effect with a feedback loop.
Referenced by juce::dsp::DelayLine< SampleType, juce::dsp::DelayLineInterpolationTypes::Thiran >::process().
void juce::dsp::DelayLine< SampleType, InterpolationType >::reset | ( | ) |
Resets the internal state variables of the processor.
void juce::dsp::DelayLine< SampleType, InterpolationType >::setDelay | ( | SampleType | newDelayInSamples | ) |
Sets the delay in samples.
void juce::dsp::DelayLine< SampleType, InterpolationType >::setMaximumDelayInSamples | ( | int | maxDelayInSamples | ) |
Sets a new maximum delay in samples.
Also clears the delay line.
This may allocate internally, so you should never call it from the audio thread.
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