Project Ne10
An open, optimized software library for the ARM architecture.

Functions  
ne10_result_t  ne10_fir_sparse_init_float (ne10_fir_sparse_instance_f32_t *S, ne10_uint16_t numTaps, ne10_float32_t *pCoeffs, ne10_float32_t *pState, ne10_int32_t *pTapDelay, ne10_uint16_t maxDelay, ne10_uint32_t blockSize) 
Initialization function for the floatingpoint sparse FIR filter. More...  
void  ne10_fir_sparse_float_c (ne10_fir_sparse_instance_f32_t *S, ne10_float32_t *pSrc, ne10_float32_t *pDst, ne10_float32_t *pScratchIn, ne10_uint32_t blockSize) 
Specific implementation of ne10_fir_sparse_float using plain C. More...  
void  ne10_fir_sparse_float_neon (ne10_fir_sparse_instance_f32_t *S, ne10_float32_t *pSrc, ne10_float32_t *pDst, ne10_float32_t *pScratch, ne10_uint32_t blockSize) asm("ne10_fir_sparse_float_neon") 
Specific implementation of ne10_fir_sparse_float using NEON SIMD capabilities. More...  
Variables  
void(*  ne10_fir_sparse_float )(ne10_fir_sparse_instance_f32_t *S, ne10_float32_t *pSrc, ne10_float32_t *pDst, ne10_float32_t *pScratchIn, ne10_uint32_t blockSize) 
Processing function for the floatingpoint sparse FIR filter. More...  
There are separate functions for floatingpoint data types. The functions operate on blocks of input and output data and each call to the function processes blockSize
samples through the filter. pSrc
and pDst
points to input and output arrays respectively containing blockSize
values.
pTapDelay
which specifies the locations of the nonzero coefficients. This is in addition to the coefficient array b
. The implementation essentially skips the multiplications by zero and leads to an efficient realization. y[n] = b[0] * x[npTapDelay[0]] + b[1] * x[npTapDelay[1]] + b[2] * x[npTapDelay[2]] + ...+ b[numTaps1] * x[npTapDelay[numTaps1]]
pCoeffs
points to a coefficient array of size numTaps
; pTapDelay
points to an array of nonzero indices and is also of size numTaps
; pState
points to a state array of size maxDelay + blockSize
, where maxDelay
is the largest offset value that is ever used in the pTapDelay
array. Some of the processing functions also require temporary working buffers.*ne10_fir_sparse_instance_f32_t S = {numTaps, 0, pState, pCoeffs, maxDelay, pTapDelay};
void ne10_fir_sparse_float_c  (  ne10_fir_sparse_instance_f32_t *  S, 
ne10_float32_t *  pSrc,  
ne10_float32_t *  pDst,  
ne10_float32_t *  pScratchIn,  
ne10_uint32_t  blockSize  
) 
Specific implementation of ne10_fir_sparse_float using plain C.
Definition at line 1386 of file NE10_fir.c.
void ne10_fir_sparse_float_neon  (  ne10_fir_sparse_instance_f32_t *  S, 
ne10_float32_t *  pSrc,  
ne10_float32_t *  pDst,  
ne10_float32_t *  pScratch,  
ne10_uint32_t  blockSize  
) 
Specific implementation of ne10_fir_sparse_float using NEON SIMD capabilities.
ne10_result_t ne10_fir_sparse_init_float  (  ne10_fir_sparse_instance_f32_t *  S, 
ne10_uint16_t  numTaps,  
ne10_float32_t *  pCoeffs,  
ne10_float32_t *  pState,  
ne10_int32_t *  pTapDelay,  
ne10_uint16_t  maxDelay,  
ne10_uint32_t  blockSize  
) 
Initialization function for the floatingpoint sparse FIR filter.
[in,out]  *S  points to an instance of the floatingpoint sparse FIR structure. 
[in]  numTaps  number of nonzero coefficients in the filter. 
[in]  *pCoeffs  points to the array of filter coefficients. 
[in]  *pState  points to the state buffer. 
[in]  *pTapDelay  points to the array of offset times. 
[in]  maxDelay  maximum offset time supported. 
[in]  blockSize  number of samples that will be processed per block. 
Description:
pCoeffs
holds the filter coefficients and has length numTaps
. pState
holds the filter's state variables and must be of length maxDelay + blockSize
, where maxDelay
is the maximum number of delay line values. blockSize
is the number of samples processed by the arm_fir_sparse_f32()
function. Definition at line 260 of file NE10_fir_init.c.
void(* ne10_fir_sparse_float) (ne10_fir_sparse_instance_f32_t *S, ne10_float32_t *pSrc, ne10_float32_t *pDst, ne10_float32_t *pScratchIn, ne10_uint32_t blockSize) 
Processing function for the floatingpoint sparse FIR filter.
[in]  *S  points to an instance of the floatingpoint sparse FIR structure. 
[in]  *pSrc  points to the block of input data. 
[out]  *pDst  points to the block of output data 
[in]  *pScratchIn  points to a temporary buffer of size blockSize. 
[in]  blockSize  number of input samples to process per call. 
Points to ne10_fir_sparse_float_c or ne10_fir_sparse_float_neon.
Definition at line 186 of file NE10_init_dsp.c.