DSP_fir_r8_h8
[Filtering and convolution]

Collaboration diagram for DSP_fir_r8_h8:

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Detailed Description

void	DSP_fir_r8_h8 (const short *restrict x, const short *restrict h, short *restrict r, int nr)

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Function Documentation

void DSP_fir_r8_h8	(	const short *restrict	x,
		const short *restrict	h,
		short *restrict	r,
		int	nr
	)

Computes a real FIR filter (direct-form) using 8 coefficients stored in vector h. The real data input is stored in vector x. The filter output result is stored in vector r. Input data and filter taps are 16-bit, with intermediate values kept at 32-bit precision. Filter taps are expected in Q15 format.

Parameters:

	x	= Input array [nr+8-1 elements]
	h	= Coeff array [8 elements]
	r	= Output array [nr elements]
	nr	= Number of output samples

Algorithm:

DSP_fir_r8_h8_cn.c is the natural C equivalent of the optimized intrinsic C code without restrictions. Note that the intrinsic C code is optimized and restrictions may apply.

Assumptions:

Arrays x, h, and r do not overlap.
x, h and r must be double word aligned.
nr >= 4; nr % 4 == 0.
nh == 8.

Implementation Notes:

Endian Support: The code supports both big and little endian modes.
Interruptibility: The code is interruptible.

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Copyright 2014, Texas Instruments Incorporated