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

Functions  
ne10_result_t  ne10_fir_lattice_init_float (ne10_fir_lattice_instance_f32_t *S, ne10_uint16_t numStages, ne10_float32_t *pCoeffs, ne10_float32_t *pState) 
Initialization function for the floatingpoint FIR lattice filter. More...  
void  ne10_fir_lattice_float_c (const ne10_fir_lattice_instance_f32_t *S, ne10_float32_t *pSrc, ne10_float32_t *pDst, ne10_uint32_t blockSize) 
Specific implementation of ne10_fir_lattice_float using plain C. More...  
void  ne10_fir_lattice_float_neon (const ne10_fir_lattice_instance_f32_t *S, ne10_float32_t *pSrc, ne10_float32_t *pDst, ne10_uint32_t blockSize) asm("ne10_fir_lattice_float_neon") 
Specific implementation of ne10_fir_lattice_float using NEON SIMD capabilities. More...  
Variables  
void(*  ne10_fir_lattice_float )(const ne10_fir_lattice_instance_f32_t *S, ne10_float32_t *pSrc, ne10_float32_t *pDst, ne10_uint32_t blockSize) 
Processing function for the floatingpoint FIR lattice filter. More...  
blockSize
samples through the filter. pSrc
and pDst
point to input and output arrays containing blockSize
values.f0[n] = g0[n] = x[n] fm[n] = fm1[n] + km * gm1[n1] for m = 1, 2, ...M gm[n] = km * fm1[n] + gm1[n1] for m = 1, 2, ...M y[n] = fM[n]
pCoeffs
points to tha array of reflection coefficients of size numStages
. Reflection Coefficients are stored in the following order. {k1, k2, ..., kM}where M is number of stages
pState
points to a state array of size numStages
. The state variables (g values) hold previous inputs and are stored in the following order. {g0[n], g1[n], g2[n] ...gM1[n]}The state variables are updated after each block of data is processed; the coefficients are untouched.
*ne10_iir_lattice_instance_f32_t S = {numStages, pState, pCoeffs};
numStages
is the number of stages in the filter; pState
is the address of the state buffer; pCoeffs
is the address of the coefficient buffer. void ne10_fir_lattice_float_c  (  const ne10_fir_lattice_instance_f32_t *  S, 
ne10_float32_t *  pSrc,  
ne10_float32_t *  pDst,  
ne10_uint32_t  blockSize  
) 
Specific implementation of ne10_fir_lattice_float using plain C.
Definition at line 929 of file NE10_fir.c.
void ne10_fir_lattice_float_neon  (  const ne10_fir_lattice_instance_f32_t *  S, 
ne10_float32_t *  pSrc,  
ne10_float32_t *  pDst,  
ne10_uint32_t  blockSize  
) 
Specific implementation of ne10_fir_lattice_float using NEON SIMD capabilities.
ne10_result_t ne10_fir_lattice_init_float  (  ne10_fir_lattice_instance_f32_t *  S, 
ne10_uint16_t  numStages,  
ne10_float32_t *  pCoeffs,  
ne10_float32_t *  pState  
) 
Initialization function for the floatingpoint FIR lattice filter.
[in]  *S  points to an instance of the floatingpoint FIR lattice structure. 
[in]  numStages  number of filter stages. 
[in]  *pCoeffs  points to the coefficient buffer. The array is of length numStages. 
[in]  *pState  points to the state buffer. The array is of length numStages. 
Definition at line 217 of file NE10_fir_init.c.
void(* ne10_fir_lattice_float) (const ne10_fir_lattice_instance_f32_t *S, ne10_float32_t *pSrc, ne10_float32_t *pDst, ne10_uint32_t blockSize) 
Processing function for the floatingpoint FIR lattice filter.
[in]  *S  points to an instance of the floatingpoint FIR lattice structure. 
[in]  *pSrc  points to the block of input data. 
[out]  *pDst  points to the block of output data 
[in]  blockSize  number of samples to process. 
Points to ne10_fir_lattice_float_c or ne10_fir_lattice_float_neon.
Definition at line 180 of file NE10_init_dsp.c.