gr_sync_interpolator Class Reference
[Signal Processing Blocks]

#include <gr_sync_interpolator.h>

Inheritance diagram for gr_sync_interpolator:

gr_sync_block gr_block gr_bytes_to_syms gr_chunks_to_symbols_bc gr_chunks_to_symbols_bf gr_chunks_to_symbols_ic gr_chunks_to_symbols_if gr_chunks_to_symbols_sc gr_chunks_to_symbols_sf gr_complex_to_interleaved_short gr_interleave gr_interp_fir_filter_ccc gr_interp_fir_filter_ccf gr_interp_fir_filter_fcc gr_interp_fir_filter_fff gr_interp_fir_filter_fsf gr_interp_fir_filter_scc gr_streams_to_stream gr_unpack_k_bits_bb gr_vector_to_stream gsm_fr_decode_ps

List of all members.


Detailed Description

synchronous 1:N input to output with history

Override work to provide the signal processing implementation.

Public Member Functions

unsigned interpolation () const
void set_interpolation (unsigned interpolation)
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
int fixed_rate_ninput_to_noutout (int ninput)
int fixed_rate_noutput_to_ninput (int noutput)
 Given noutput samples, return number of input samples required to produce noutput. N.B. this is only defined if fixed_rate returns true. Generally speaking, you don't need to override this.

Protected Member Functions

 gr_sync_interpolator (const std::string &name, gr_io_signature_sptr input_signature, gr_io_signature_sptr output_signature, unsigned interpolation)


Constructor & Destructor Documentation

gr_sync_interpolator::gr_sync_interpolator ( const std::string &  name,
gr_io_signature_sptr  input_signature,
gr_io_signature_sptr  output_signature,
unsigned  interpolation 
) [protected]

References set_interpolation().


Member Function Documentation

unsigned gr_sync_interpolator::interpolation (  )  const [inline]

void gr_sync_interpolator::set_interpolation ( unsigned  interpolation  )  [inline]

void gr_sync_interpolator::forecast ( int  noutput_items,
gr_vector_int ninput_items_required 
) [virtual]

Estimate input requirements given output request.

Parameters:
noutput_items number of output items to produce
ninput_items_required number of input items required on each input stream
Given a request to product 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_sync_block.

References fixed_rate_noutput_to_ninput().

int gr_sync_interpolator::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

Parameters:
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
Returns:
number of items actually written to each output stream, or -1 on EOF. It is OK to return a value less than noutput_items. -1 <= return value <= noutput_items
general_work must call consume or consume_each to indicate how many items were consumed on each input stream.

Reimplemented from gr_sync_block.

References gr_block::consume_each(), interpolation(), and gr_sync_block::work().

int gr_sync_interpolator::fixed_rate_ninput_to_noutout ( int  ninput  ) 

int gr_sync_interpolator::fixed_rate_noutput_to_ninput ( int  noutput  )  [virtual]

Given noutput samples, return number of input samples required to produce noutput. N.B. this is only defined if fixed_rate returns true. Generally speaking, you don't need to override this.

Reimplemented from gr_sync_block.

References gr_block::history(), and interpolation().

Referenced by forecast().


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

Generated on Wed Oct 8 09:09:08 2008 for GNU Radio 3.0.4 by  doxygen 1.5.6