gr::digital::packet_headergenerator_bb_impl Class Reference

#include <packet_headergenerator_bb_impl.h>

Inheritance diagram for gr::digital::packet_headergenerator_bb_impl:

List of all members.

Public Member Functions
	packet_headergenerator_bb_impl (const packet_header_default::sptr &header_formatter, const std::string &len_tag_key)
	~packet_headergenerator_bb_impl ()
void	remove_length_tags (const std::vector< std::vector< gr_tag_t > > &tags)
int	calculate_output_stream_length (const gr_vector_int &ninput_items)
	Calculate the number of output items.
int	work (int noutput_items, gr_vector_int &ninput_items, gr_vector_const_void_star &input_items, gr_vector_void_star &output_items)
	Just like gr_block::general_work, but makes sure the input is valid.

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Constructor & Destructor Documentation

gr::digital::packet_headergenerator_bb_impl::packet_headergenerator_bb_impl	(	const packet_header_default::sptr &	header_formatter,
		const std::string &	len_tag_key
	)

gr::digital::packet_headergenerator_bb_impl::~packet_headergenerator_bb_impl

(

)

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Member Function Documentation

int gr::digital::packet_headergenerator_bb_impl::calculate_output_stream_length

(

const gr_vector_int &

ninput_items

)

[inline, virtual]

Calculate the number of output items.

This is basically the inverse function to forecast(): Given a number of input items, it returns the maximum number of output items.

You most likely need to override this function, unless your block is a sync block or integer interpolator/decimator.

Reimplemented from gr_tagged_stream_block.

void gr::digital::packet_headergenerator_bb_impl::remove_length_tags

(

const std::vector< std::vector< gr_tag_t > > &

tags

)

[inline]

int gr::digital::packet_headergenerator_bb_impl::work	(	int	noutput_items,
		gr_vector_int &	ninput_items,
		gr_vector_const_void_star &	input_items,
		gr_vector_void_star &	output_items
	)		[virtual]

Just like gr_block::general_work, but makes sure the input is valid.

The user must override work to define the signal processing code. Check the documentation for general_work() to see what happens here.

Like gr_sync_block, this calls consume() for you (it consumes ninput_items[i] items from the i-th port).

A note on tag propagation: The PDU length tags are handled by other functions, but all other tags are handled just as in any other gr_block. So, most likely, you either set the tag propagation policy to TPP_DONT and handle the tag propagation manually, or you propagate tags through the scheduler and don't do anything here.

Parameters:

noutput_items	The size of the writable output buffer
ninput_items	The exact size of the items on every input for this particular PDU. These will be consumed if a length tag key is provided!
input_items	See gr_block
output_items	See gr_block

Implements gr_tagged_stream_block.

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

• packet_headergenerator_bb_impl.h