Superpowered::Resampler Class Reference

Linear or 6-point resampler, audio reverser and 16-bit to 32-bit audio converter. More...

#include "SuperpoweredResampler.h"

Public Member Functions
	Resampler ()
	~Resampler ()
int	process (short int *input, float *output, int numberOfFrames, bool reverse=false, bool highQuality=false, float rateAdd=0.0f)
	Processes the audio. More...
int	process (short int *input, float *temp, short int *output, int numberOfFrames, bool reverse=false, bool highQuality=false, float rateAdd=0.0f)
	Processes the audio. More...
void	reset ()
	Reset all internals. Doesn't change rate. More...

Public Attributes
float	rate
	Default: 1.0f. If rate = 1, process() is "transparent" without any effect on audio quality. More...

Private Member Functions
	Resampler (const Resampler &)
Resampler &	operator= (const Resampler &)

Private Attributes
resamplerInternals *	internals

Detailed Description

Linear or 6-point resampler, audio reverser and 16-bit to 32-bit audio converter.

It doesn't allocate any internal buffers and needs just a few bytes of memory.

Constructor & Destructor Documentation

Resampler() [1/2]

Superpowered::Resampler::Resampler

(

)

~Resampler()

Superpowered::Resampler::~Resampler

(

)

Resampler() [2/2]

Superpowered::Resampler::Resampler ( const Resampler &  )

private

Member Function Documentation

operator=()

Resampler& Superpowered::Resampler::operator= ( const Resampler &  )

private

process() [1/2]

int Superpowered::Resampler::process	(	short int *	input,
		float *	output,
		int	numberOfFrames,
		bool	reverse = false,
		bool	highQuality = false,
		float	rateAdd = 0.0f
	)

Processes the audio.

Returns

The number of output frames.

Parameters

input	Pointer to short integer numbers, 16-bit stereo interleaved input. Should be numberOfFrames * 2 + 64 big.
output	Pointer to floating point numbers, 32-bit stereo interleaved output. Should be big enough to store the expected number of output frames and some more.
numberOfFrames	Number of frames to process.
reverse	If true, the output will be backwards (reverse playback).
highQuality	Enables more sophisticated processing to reduce interpolation noise. Good for scratching for example, but not recommended for continous music playback above 0.5 rate.
rateAdd	Changes rate smoothly during process(). Useful for scratching or super smooth rate changes. After process() rate will be changed, but may or may not be precisely equal to the desired target value.

process() [2/2]

int Superpowered::Resampler::process	(	short int *	input,
		float *	temp,
		short int *	output,
		int	numberOfFrames,
		bool	reverse = false,
		bool	highQuality = false,
		float	rateAdd = 0.0f
	)

Processes the audio.

Returns

The number of output frames.

Parameters

input	Pointer to short integer numbers, 16-bit stereo interleaved input. Should be numberOfFrames * 2 + 64 big.
temp	Pointer to floating point numbers. Should be numberOfFrames * 2 + 64 big.
output	Pointer to short integer numbers, 16-bit stereo interleaved output. Should be big enough to store the expected number of output frames and some more.
numberOfFrames	Number of frames to process.
reverse	If true, the output will be backwards (reverse playback).
highQuality	Enables more sophisticated processing to reduce interpolation noise. Good for scratching for example, but not recommended for continous music playback above 0.5 rate.
rateAdd	Changes rate smoothly during process(). Useful for scratching or super smooth rate changes. After process() rate will be changed, but may or may not be precisely equal to the desired target value.

reset()

void Superpowered::Resampler::reset

(

)

Reset all internals. Doesn't change rate.

Member Data Documentation

internals

resamplerInternals* Superpowered::Resampler::internals

private

rate

float Superpowered::Resampler::rate

Default: 1.0f. If rate = 1, process() is "transparent" without any effect on audio quality.

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

• latest/Superpowered/SuperpoweredResampler.h