GNU Radio 3.7.1 C++ API
gr::sync_block Class Referenceabstract

synchronous 1:1 input to output with historyOverride work to provide the signal processing implementation. More...

#include <sync_block.h>

Inheritance diagram for gr::sync_block:
gr::block gr::basic_block gr::msg_accepter gr::messages::msg_accepter atsc_deinterleaver atsc_derandomizer atsc_ds_to_softds atsc_equalizer atsc_fpll atsc_fs_checker atsc_interleaver atsc_randomizer atsc_rs_decoder atsc_rs_encoder atsc_trellis_encoder atsc_viterbi_decoder gr::analog::agc2_cc gr::analog::agc2_ff gr::analog::agc3_cc gr::analog::agc_cc gr::analog::agc_ff gr::analog::dpll_bb gr::analog::fastnoise_source_c gr::analog::fastnoise_source_f gr::analog::fastnoise_source_i gr::analog::fastnoise_source_s gr::analog::feedforward_agc_cc gr::analog::fmdet_cf gr::analog::frequency_modulator_fc gr::analog::noise_source_c gr::analog::noise_source_f gr::analog::noise_source_i gr::analog::noise_source_s gr::analog::phase_modulator_fc gr::analog::pll_carriertracking_cc gr::analog::pll_freqdet_cf gr::analog::pll_refout_cc gr::analog::probe_avg_mag_sqrd_c gr::analog::probe_avg_mag_sqrd_cf gr::analog::probe_avg_mag_sqrd_f gr::analog::quadrature_demod_cf gr::analog::rail_ff gr::analog::sig_source_c gr::analog::sig_source_f gr::analog::sig_source_i gr::analog::sig_source_s gr::analog::simple_squelch_cc gr::audio::sink gr::audio::source gr::blocks::add_cc gr::blocks::add_const_bb gr::blocks::add_const_cc gr::blocks::add_const_ff gr::blocks::add_const_ii gr::blocks::add_const_ss gr::blocks::add_const_vbb gr::blocks::add_const_vcc gr::blocks::add_const_vff gr::blocks::add_const_vii gr::blocks::add_const_vss gr::blocks::add_ff gr::blocks::add_ii gr::blocks::add_ss gr::blocks::and_bb gr::blocks::and_const_bb gr::blocks::and_const_ii gr::blocks::and_const_ss gr::blocks::and_ii gr::blocks::and_ss gr::blocks::annotator_1to1 gr::blocks::annotator_alltoall gr::blocks::annotator_raw gr::blocks::argmax_fs gr::blocks::argmax_is gr::blocks::argmax_ss gr::blocks::bin_statistics_f gr::blocks::burst_tagger gr::blocks::char_to_float gr::blocks::char_to_short gr::blocks::check_lfsr_32k_s gr::blocks::complex_to_arg gr::blocks::complex_to_float gr::blocks::complex_to_imag gr::blocks::complex_to_mag gr::blocks::complex_to_mag_squared gr::blocks::complex_to_real gr::blocks::conjugate_cc gr::blocks::ctrlport_probe2_b gr::blocks::ctrlport_probe2_c gr::blocks::ctrlport_probe2_f gr::blocks::ctrlport_probe2_i gr::blocks::ctrlport_probe2_s gr::blocks::ctrlport_probe_c gr::blocks::divide_cc gr::blocks::divide_ff gr::blocks::divide_ii gr::blocks::divide_ss gr::blocks::endian_swap gr::blocks::file_descriptor_sink gr::blocks::file_descriptor_source gr::blocks::file_meta_sink gr::blocks::file_meta_source gr::blocks::file_sink gr::blocks::file_source gr::blocks::float_to_char gr::blocks::float_to_complex gr::blocks::float_to_int gr::blocks::float_to_short gr::blocks::float_to_uchar gr::blocks::head gr::blocks::int_to_float gr::blocks::lfsr_32k_source_s gr::blocks::max_ff gr::blocks::max_ii gr::blocks::max_ss gr::blocks::message_burst_source gr::blocks::message_sink gr::blocks::message_source gr::blocks::moving_average_cc gr::blocks::moving_average_ff gr::blocks::moving_average_ii gr::blocks::moving_average_ss gr::blocks::multiply_cc gr::blocks::multiply_conjugate_cc gr::blocks::multiply_const_cc gr::blocks::multiply_const_ff gr::blocks::multiply_const_ii gr::blocks::multiply_const_ss gr::blocks::multiply_const_vcc gr::blocks::multiply_const_vff gr::blocks::multiply_const_vii gr::blocks::multiply_const_vss gr::blocks::multiply_ff gr::blocks::multiply_ii gr::blocks::multiply_ss gr::blocks::mute_cc gr::blocks::mute_ff gr::blocks::mute_ii gr::blocks::mute_ss gr::blocks::nlog10_ff gr::blocks::not_bb gr::blocks::not_ii gr::blocks::not_ss gr::blocks::null_sink gr::blocks::null_source gr::blocks::or_bb gr::blocks::or_ii gr::blocks::or_ss gr::blocks::pdu_to_tagged_stream gr::blocks::peak_detector2_fb gr::blocks::peak_detector_fb gr::blocks::peak_detector_ib gr::blocks::peak_detector_sb gr::blocks::probe_rate gr::blocks::probe_signal_b gr::blocks::probe_signal_c gr::blocks::probe_signal_f gr::blocks::probe_signal_i gr::blocks::probe_signal_s gr::blocks::probe_signal_vb gr::blocks::probe_signal_vc gr::blocks::probe_signal_vf gr::blocks::probe_signal_vi gr::blocks::probe_signal_vs gr::blocks::regenerate_bb gr::blocks::rms_cf gr::blocks::rms_ff gr::blocks::sample_and_hold_bb gr::blocks::sample_and_hold_ff gr::blocks::sample_and_hold_ii gr::blocks::sample_and_hold_ss gr::blocks::short_to_char gr::blocks::short_to_float gr::blocks::streams_to_vector gr::blocks::stretch_ff gr::blocks::sub_cc gr::blocks::sub_ff gr::blocks::sub_ii gr::blocks::sub_ss gr::blocks::tag_debug gr::blocks::tag_gate gr::blocks::tagged_file_sink gr::blocks::tagged_stream_to_pdu gr::blocks::tags_strobe gr::blocks::threshold_ff gr::blocks::throttle gr::blocks::transcendental gr::blocks::uchar_to_float gr::blocks::udp_sink gr::blocks::udp_source gr::blocks::vco_c gr::blocks::vco_f gr::blocks::vector_map gr::blocks::vector_sink_b gr::blocks::vector_sink_c gr::blocks::vector_sink_f gr::blocks::vector_sink_i gr::blocks::vector_sink_s gr::blocks::vector_source_b gr::blocks::vector_source_c gr::blocks::vector_source_f gr::blocks::vector_source_i gr::blocks::vector_source_s gr::blocks::vector_to_streams gr::blocks::wavfile_sink gr::blocks::wavfile_source gr::blocks::xor_bb gr::blocks::xor_ii gr::blocks::xor_ss gr::channels::fading_model gr::channels::selective_fading_model gr::comedi::sink_s gr::comedi::source_s gr::digital::additive_scrambler_bb gr::digital::binary_slicer_fb gr::digital::correlate_access_code_bb gr::digital::correlate_access_code_tag_bb gr::digital::costas_loop_cc gr::digital::descrambler_bb gr::digital::diff_decoder_bb gr::digital::diff_encoder_bb gr::digital::diff_phasor_cc gr::digital::fll_band_edge_cc gr::digital::framer_sink_1 gr::digital::glfsr_source_b gr::digital::glfsr_source_f gr::digital::map_bb gr::digital::mpsk_snr_est_cc gr::digital::ofdm_frame_sink gr::digital::ofdm_mapper_bcv gr::digital::packet_headerparser_b gr::digital::packet_sink gr::digital::probe_density_b gr::digital::probe_mpsk_snr_est_c gr::digital::scrambler_bb gr::fft::ctrlport_probe_psd gr::fft::fft_vcc gr::fft::fft_vfc gr::filter::dc_blocker_cc gr::filter::dc_blocker_ff gr::filter::filter_delay_fc gr::filter::hilbert_fc gr::filter::iir_filter_ffd gr::filter::pfb_decimator_ccf gr::filter::single_pole_iir_filter_cc gr::filter::single_pole_iir_filter_ff gr::noaa::hrpt_decoder gr::noaa::hrpt_pll_cf gr::pager::flex_parse gr::pager::slicer_fb gr::qtgui::const_sink_c gr::qtgui::freq_sink_c gr::qtgui::freq_sink_f gr::qtgui::histogram_sink_f gr::qtgui::time_raster_sink_b gr::qtgui::time_raster_sink_f gr::qtgui::time_sink_c gr::qtgui::time_sink_f gr::qtgui::waterfall_sink_c gr::qtgui::waterfall_sink_f gr::sync_decimator gr::sync_interpolator gr::trellis::encoder_bb gr::trellis::encoder_bi gr::trellis::encoder_bs gr::trellis::encoder_ii gr::trellis::encoder_si gr::trellis::encoder_ss gr::trellis::pccc_encoder_bb gr::trellis::pccc_encoder_bi gr::trellis::pccc_encoder_bs gr::trellis::pccc_encoder_ii gr::trellis::pccc_encoder_si gr::trellis::pccc_encoder_ss gr::trellis::permutation gr::trellis::sccc_encoder_bb gr::trellis::sccc_encoder_bi gr::trellis::sccc_encoder_bs gr::trellis::sccc_encoder_ii gr::trellis::sccc_encoder_si gr::trellis::sccc_encoder_ss gr::uhd::usrp_sink gr::uhd::usrp_source gr::video_sdl::sink_s gr::video_sdl::sink_uc gr::vocoder::alaw_decode_bs gr::vocoder::alaw_encode_sb gr::vocoder::g721_decode_bs gr::vocoder::g721_encode_sb gr::vocoder::g723_24_decode_bs gr::vocoder::g723_24_encode_sb gr::vocoder::g723_40_decode_bs gr::vocoder::g723_40_encode_sb gr::vocoder::ulaw_decode_bs gr::vocoder::ulaw_encode_sb gr::wavelet::squash_ff gr::wavelet::wavelet_ff gr::wavelet::wvps_ff gr::wxgui::histo_sink_f gr::wxgui::oscope_sink_x tag_sink_demo tag_source_demo

Public Member Functions

virtual int work (int noutput_items, gr_vector_const_void_star &input_items, gr_vector_void_star &output_items)=0
 just like gr::block::general_work, only this arranges to call consume_each for you More...
 
void forecast (int noutput_items, gr_vector_int &ninput_items_required)
 Estimate input requirements given output request. More...
 
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 More...
 
int fixed_rate_ninput_to_noutput (int ninput)
 Given ninput samples, return number of output samples that will be produced. N.B. this is only defined if fixed_rate returns true. Generally speaking, you don't need to override this. More...
 
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. More...
 
- Public Member Functions inherited from gr::block
virtual ~block ()
 
unsigned history () const
 
void set_history (unsigned history)
 
bool fixed_rate () const
 Return true if this block has a fixed input to output rate. More...
 
virtual bool start ()
 Called to enable drivers, etc for i/o devices. More...
 
virtual bool stop ()
 Called to disable drivers, etc for i/o devices. More...
 
void set_output_multiple (int multiple)
 Constrain the noutput_items argument passed to forecast and general_work. More...
 
int output_multiple () const
 
bool output_multiple_set () const
 
void set_alignment (int multiple)
 Constrains buffers to work on a set item alignment (for SIMD) More...
 
int alignment () const
 
void set_unaligned (int na)
 
int unaligned () const
 
void set_is_unaligned (bool u)
 
bool is_unaligned () const
 
void consume (int which_input, int how_many_items)
 Tell the scheduler how_many_items of input stream which_input were consumed. More...
 
void consume_each (int how_many_items)
 Tell the scheduler how_many_items were consumed on each input stream. More...
 
void produce (int which_output, int how_many_items)
 Tell the scheduler how_many_items were produced on output stream which_output. More...
 
void set_relative_rate (double relative_rate)
 Set the approximate output rate / input rate. More...
 
double relative_rate () const
 return the approximate output rate / input rate More...
 
uint64_t nitems_read (unsigned int which_input)
 Return the number of items read on input stream which_input. More...
 
uint64_t nitems_written (unsigned int which_output)
 Return the number of items written on output stream which_output. More...
 
tag_propagation_policy_t tag_propagation_policy ()
 Asks for the policy used by the scheduler to moved tags downstream. More...
 
void set_tag_propagation_policy (tag_propagation_policy_t p)
 Set the policy by the scheduler to determine how tags are moved downstream. More...
 
int min_noutput_items () const
 Return the minimum number of output items this block can produce during a call to work. More...
 
void set_min_noutput_items (int m)
 Set the minimum number of output items this block can produce during a call to work. More...
 
int max_noutput_items ()
 Return the maximum number of output items this block will handle during a call to work. More...
 
void set_max_noutput_items (int m)
 Set the maximum number of output items this block will handle during a call to work. More...
 
void unset_max_noutput_items ()
 Clear the switch for using the max_noutput_items value of this block. More...
 
bool is_set_max_noutput_items ()
 Ask the block if the flag is or is not set to use the internal value of max_noutput_items during a call to work. More...
 
void expand_minmax_buffer (int port)
 
long max_output_buffer (size_t i)
 Returns max buffer size on output port i. More...
 
void set_max_output_buffer (long max_output_buffer)
 Sets max buffer size on all output ports. More...
 
void set_max_output_buffer (int port, long max_output_buffer)
 Sets max buffer size on output port port. More...
 
long min_output_buffer (size_t i)
 Returns min buffer size on output port i. More...
 
void set_min_output_buffer (long min_output_buffer)
 Sets min buffer size on all output ports. More...
 
void set_min_output_buffer (int port, long min_output_buffer)
 Sets min buffer size on output port port. More...
 
float pc_noutput_items ()
 Gets instantaneous noutput_items performance counter. More...
 
float pc_noutput_items_avg ()
 Gets average noutput_items performance counter. More...
 
float pc_noutput_items_var ()
 Gets variance of noutput_items performance counter. More...
 
float pc_nproduced ()
 Gets instantaneous num items produced performance counter. More...
 
float pc_nproduced_avg ()
 Gets average num items produced performance counter. More...
 
float pc_nproduced_var ()
 Gets variance of num items produced performance counter. More...
 
float pc_input_buffers_full (int which)
 Gets instantaneous fullness of which input buffer. More...
 
float pc_input_buffers_full_avg (int which)
 Gets average fullness of which input buffer. More...
 
float pc_input_buffers_full_var (int which)
 Gets variance of fullness of which input buffer. More...
 
std::vector< float > pc_input_buffers_full ()
 Gets instantaneous fullness of all input buffers. More...
 
std::vector< float > pc_input_buffers_full_avg ()
 Gets average fullness of all input buffers. More...
 
std::vector< float > pc_input_buffers_full_var ()
 Gets variance of fullness of all input buffers. More...
 
float pc_output_buffers_full (int which)
 Gets instantaneous fullness of which input buffer. More...
 
float pc_output_buffers_full_avg (int which)
 Gets average fullness of which input buffer. More...
 
float pc_output_buffers_full_var (int which)
 Gets variance of fullness of which input buffer. More...
 
std::vector< float > pc_output_buffers_full ()
 Gets instantaneous fullness of all output buffers. More...
 
std::vector< float > pc_output_buffers_full_avg ()
 Gets average fullness of all output buffers. More...
 
std::vector< float > pc_output_buffers_full_var ()
 Gets variance of fullness of all output buffers. More...
 
float pc_work_time ()
 Gets instantaneous clock cycles spent in work. More...
 
float pc_work_time_avg ()
 Gets average clock cycles spent in work. More...
 
float pc_work_time_var ()
 Gets average clock cycles spent in work. More...
 
float pc_work_time_total ()
 Gets total clock cycles spent in work. More...
 
void reset_perf_counters ()
 Resets the performance counters. More...
 
void setup_pc_rpc ()
 Sets up export of perf. counters to ControlPort. Only called by the scheduler. More...
 
bool is_pc_rpc_set ()
 Checks if this block is already exporting perf. counters to ControlPort. More...
 
void no_pc_rpc ()
 If the block calls this in its constructor, it's perf. counters will not be exported. More...
 
void set_processor_affinity (const std::vector< int > &mask)
 Set the thread's affinity to processor core n. More...
 
void unset_processor_affinity ()
 Remove processor affinity to a specific core. More...
 
std::vector< int > processor_affinity ()
 Get the current processor affinity. More...
 
int active_thread_priority ()
 Get the current thread priority in use. More...
 
int thread_priority ()
 Get the current thread priority stored. More...
 
int set_thread_priority (int priority)
 Set the current thread priority. More...
 
block_detail_sptr detail () const
 
void set_detail (block_detail_sptr detail)
 
- Public Member Functions inherited from gr::basic_block
virtual ~basic_block ()
 
long unique_id () const
 
long symbolic_id () const
 
std::string name () const
 
std::string symbol_name () const
 
gr::io_signature::sptr input_signature () const
 
gr::io_signature::sptr output_signature () const
 
basic_block_sptr to_basic_block ()
 
bool alias_set ()
 
std::string alias ()
 
pmt::pmt_t alias_pmt ()
 
void set_block_alias (std::string name)
 
void message_port_register_in (pmt::pmt_t port_id)
 
void message_port_register_out (pmt::pmt_t port_id)
 
void message_port_pub (pmt::pmt_t port_id, pmt::pmt_t msg)
 
void message_port_sub (pmt::pmt_t port_id, pmt::pmt_t target)
 
void message_port_unsub (pmt::pmt_t port_id, pmt::pmt_t target)
 
virtual bool message_port_is_hier (pmt::pmt_t port_id)
 
virtual bool message_port_is_hier_in (pmt::pmt_t port_id)
 
virtual bool message_port_is_hier_out (pmt::pmt_t port_id)
 
pmt::pmt_t message_ports_in ()
 Get input message port names. More...
 
pmt::pmt_t message_ports_out ()
 Get output message port names. More...
 
void _post (pmt::pmt_t which_port, pmt::pmt_t msg)
 
bool empty_p (pmt::pmt_t which_port)
 is the queue empty? More...
 
bool empty_p ()
 
bool empty_handled_p (pmt::pmt_t which_port)
 are all msg ports with handlers empty? More...
 
bool empty_handled_p ()
 
size_t nmsgs (pmt::pmt_t which_port)
 How many messages in the queue? More...
 
void insert_tail (pmt::pmt_t which_port, pmt::pmt_t msg)
 
pmt::pmt_t delete_head_nowait (pmt::pmt_t which_port)
 
pmt::pmt_t delete_head_blocking (pmt::pmt_t which_port)
 
msg_queue_t::iterator get_iterator (pmt::pmt_t which_port)
 
void erase_msg (pmt::pmt_t which_port, msg_queue_t::iterator it)
 
virtual bool has_msg_port (pmt::pmt_t which_port)
 
virtual void setup_rpc ()
 Set up the RPC registered variables. More...
 
bool is_rpc_set ()
 Ask if this block has been registered to the RPC. More...
 
void rpc_set ()
 When the block is registered with the RPC, set this. More...
 
virtual bool check_topology (int ninputs, int noutputs)
 Confirm that ninputs and noutputs is an acceptable combination. More...
 
template<typename T >
void set_msg_handler (pmt::pmt_t which_port, T msg_handler)
 Set the callback that is fired when messages are available. More...
 
- Public Member Functions inherited from gr::msg_accepter
 msg_accepter ()
 
 ~msg_accepter ()
 
void post (pmt::pmt_t which_port, pmt::pmt_t msg)
 send msg to msg_accepter on port which_port More...
 
- Public Member Functions inherited from gr::messages::msg_accepter
 msg_accepter ()
 

Protected Member Functions

 sync_block (void)
 
 sync_block (const std::string &name, gr::io_signature::sptr input_signature, gr::io_signature::sptr output_signature)
 
- Protected Member Functions inherited from gr::block
 block (void)
 
 block (const std::string &name, gr::io_signature::sptr input_signature, gr::io_signature::sptr output_signature)
 
void set_fixed_rate (bool fixed_rate)
 
void add_item_tag (unsigned int which_output, uint64_t abs_offset, const pmt::pmt_t &key, const pmt::pmt_t &value, const pmt::pmt_t &srcid=pmt::PMT_F)
 Adds a new tag onto the given output buffer. More...
 
void add_item_tag (unsigned int which_output, const tag_t &tag)
 Adds a new tag onto the given output buffer. More...
 
void remove_item_tag (unsigned int which_input, uint64_t abs_offset, const pmt::pmt_t &key, const pmt::pmt_t &value, const pmt::pmt_t &srcid=pmt::PMT_F)
 Removes a tag from the given input buffer. More...
 
void remove_item_tag (unsigned int which_input, const tag_t &tag)
 Removes a tag from the given input buffer. More...
 
void get_tags_in_range (std::vector< tag_t > &v, unsigned int which_input, uint64_t abs_start, uint64_t abs_end)
 Given a [start,end), returns a vector of all tags in the range. More...
 
void get_tags_in_range (std::vector< tag_t > &v, unsigned int which_input, uint64_t abs_start, uint64_t abs_end, const pmt::pmt_t &key)
 Given a [start,end), returns a vector of all tags in the range with a given key. More...
 
- Protected Member Functions inherited from gr::basic_block
 basic_block (void)
 
 basic_block (const std::string &name, gr::io_signature::sptr input_signature, gr::io_signature::sptr output_signature)
 Protected constructor prevents instantiation by non-derived classes. More...
 
void set_input_signature (gr::io_signature::sptr iosig)
 may only be called during constructor More...
 
void set_output_signature (gr::io_signature::sptr iosig)
 may only be called during constructor More...
 
void set_color (vcolor color)
 Allow the flowgraph to set for sorting and partitioning. More...
 
vcolor color () const
 
virtual bool has_msg_handler (pmt::pmt_t which_port)
 Tests if there is a handler attached to port which_port. More...
 
virtual void dispatch_msg (pmt::pmt_t which_port, pmt::pmt_t msg)
 

Additional Inherited Members

- Public Types inherited from gr::block
enum  { WORK_CALLED_PRODUCE = -2, WORK_DONE = -1 }
 Magic return values from general_work. More...
 
enum  tag_propagation_policy_t { TPP_DONT = 0, TPP_ALL_TO_ALL = 1, TPP_ONE_TO_ONE = 2 }
 
- Protected Types inherited from gr::basic_block
enum  vcolor { WHITE, GREY, BLACK }
 
- Protected Attributes inherited from gr::block
std::vector< long > d_max_output_buffer
 
std::vector< long > d_min_output_buffer
 
gr::thread::mutex d_setlock
 
gr::logger_ptr d_logger
 
gr::logger_ptr d_debug_logger
 

Detailed Description

synchronous 1:1 input to output with history

Override work to provide the signal processing implementation.

Constructor & Destructor Documentation

gr::sync_block::sync_block ( void  )
inlineprotected
gr::sync_block::sync_block ( const std::string &  name,
gr::io_signature::sptr  input_signature,
gr::io_signature::sptr  output_signature 
)
protected

Member Function Documentation

int gr::sync_block::fixed_rate_ninput_to_noutput ( int  ninput)
virtual

Given ninput samples, return number of output samples that will be produced. N.B. this is only defined if fixed_rate returns true. Generally speaking, you don't need to override this.

Reimplemented from gr::block.

Reimplemented in gr::sync_interpolator, and gr::sync_decimator.

int gr::sync_block::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::block.

Reimplemented in gr::sync_interpolator, and gr::sync_decimator.

void gr::sync_block::forecast ( int  noutput_items,
gr_vector_int ninput_items_required 
)
virtual

Estimate input requirements given output request.

Parameters
noutput_itemsnumber of output items to produce
ninput_items_requirednumber 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::block.

Reimplemented in gr::sync_interpolator, gr::sync_decimator, gr::fft::ctrlport_probe_psd_impl, atsc_equalizer, and atsc_pad.

int gr::sync_block::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_itemsnumber of output items to write on each output stream
ninput_itemsnumber of input items available on each input stream
input_itemsvector of pointers to the input items, one entry per input stream
output_itemsvector 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::block.

Reimplemented in gr::sync_interpolator, and gr::sync_decimator.

virtual int gr::sync_block::work ( int  noutput_items,
gr_vector_const_void_star input_items,
gr_vector_void_star output_items 
)
pure virtual

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