A High-precision version of IirBiQuadFilter often necessary for complex, multistage filters. More...

Public Member Functions
	IirBiQuadFilterHQ (unsigned maxNumStages, const int32_t *coeffs, int coeffShift=0)
	Construct a Biquad filter with specified number of stages, coefficients and scaling. More...

virtual	~IirBiQuadFilterHQ ()
	Destructor.

void	changeFilterCoeffs (unsigned numStages, const int32_t *coeffs, int coeffShift=0)
	Reconfigure the filter coefficients. More...

bool	process (int16_t output, int16_t input, size_t numSamples)
	Process the data using the configured IIR filter. More...

Detailed Description

A High-precision version of IirBiQuadFilter often necessary for complex, multistage filters.

This class uses CMSIS-DSP biquads with 64-bit internal precision instead of 32-bit.

Constructor & Destructor Documentation

Aviate::IirBiQuadFilterHQ::IirBiQuadFilterHQ	(	unsigned	maxNumStages,
		const int32_t *	coeffs,
		int	coeffShift = `0`
	)

Construct a Biquad filter with specified number of stages, coefficients and scaling.

See CMSIS-DSP documentation for more details

Parameters

maxNumStages	number of biquad stages. Each stage has 5 coefficients.
coeffs	pointer to an array of Q31 fixed-point coefficients (range -1 to +0.999...)
coeffShift	coeffs are multiplied by 2^coeffShift to support coefficient range scaling

void Aviate::IirBiQuadFilterHQ::changeFilterCoeffs	(	unsigned	numStages,
		const int32_t *	coeffs,
		int	coeffShift = `0`
	)

Reconfigure the filter coefficients.

See CMSIS-DSP documentation for more details

Parameters

numStages	number of biquad stages. Each stage has 5 coefficients.
coeffs	pointer to an array of Q31 fixed-point coefficients (range -1 to +0.999...)
coeffShift	coeffs are multiplied by 2^coeffShift to support coefficient range scaling

bool Aviate::IirBiQuadFilterHQ::process	(	int16_t *	output,
		int16_t *	input,
		size_t	numSamples
	)

Process the data using the configured IIR filter.

output and input can be the same pointer if in-place modification is desired

Parameters

output	poinvoid combine(audio_block_t out, audio_block_t in0, audio_block_t *in1)ter to where the output results will be written
input	pointer to where the input data will be read from
numSamples	number of samples to process

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