#include <gr_rational_resampler_base_fff.h>
Public Member Functions | |
~gr_rational_resampler_base_fff () | |
unsigned | history () const |
void | set_history (unsigned history) |
unsigned | interpolation () const |
unsigned | decimation () const |
void | set_taps (const std::vector< float > &taps) |
void | forecast (int noutput_items, gr_vector_int &ninput_items_required) |
Estimate input requirements given output request. | |
int | general_work (int noutput_items, gr_vector_int &ninput_items, gr_vector_const_void_star &input_items, gr_vector_void_star &output_items) |
compute output items from input items | |
Friends | |
gr_rational_resampler_base_fff_sptr | gr_make_rational_resampler_base_fff (unsigned interpolation, unsigned decimation, const std::vector< float > &taps) |
gr_rational_resampler_base_fff::~gr_rational_resampler_base_fff | ( | ) |
References interpolation().
unsigned gr_rational_resampler_base_fff::decimation | ( | ) | const [inline] |
Referenced by forecast(), and general_work().
void gr_rational_resampler_base_fff::forecast | ( | int | noutput_items, | |
gr_vector_int & | ninput_items_required | |||
) | [virtual] |
Estimate input requirements given output request.
noutput_items | number of output items to produce | |
ninput_items_required | number of input items required on each input stream |
noutput_items
, estimate the number of data items required on each input stream. The estimate doesn't have to be exact, but should be close.
Reimplemented from gr_block.
References decimation(), history(), and interpolation().
int gr_rational_resampler_base_fff::general_work | ( | int | noutput_items, | |
gr_vector_int & | ninput_items, | |||
gr_vector_const_void_star & | input_items, | |||
gr_vector_void_star & | output_items | |||
) | [virtual] |
compute output items from input items
noutput_items | number of output items to write on each output stream | |
ninput_items | number of input items available on each input stream | |
input_items | vector of pointers to the input items, one entry per input stream | |
output_items | vector of pointers to the output items, one entry per output stream |
Implements gr_block.
References gr_block::consume_each(), decimation(), and interpolation().
unsigned gr_rational_resampler_base_fff::history | ( | ) | const [inline] |
Assume block computes y_i = f(x_i, x_i-1, x_i-2, x_i-3...) History is the number of x_i's that are examined to produce one y_i. This comes in handy for FIR filters, where we use history to ensure that our input contains the appropriate "history" for the filter. History should be equal to the number of filter taps.
Reimplemented from gr_block.
Referenced by forecast().
unsigned gr_rational_resampler_base_fff::interpolation | ( | ) | const [inline] |
Referenced by forecast(), general_work(), set_taps(), and ~gr_rational_resampler_base_fff().
void gr_rational_resampler_base_fff::set_history | ( | unsigned | history | ) | [inline] |
Reimplemented from gr_block.
void gr_rational_resampler_base_fff::set_taps | ( | const std::vector< float > & | taps | ) |
References interpolation().
gr_rational_resampler_base_fff_sptr gr_make_rational_resampler_base_fff | ( | unsigned | interpolation, | |
unsigned | decimation, | |||
const std::vector< float > & | taps | |||
) | [friend] |