Unpacked to Packed: Difference between revisions

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[[Category:Block Docs]]
[[Category:Block Docs]]
[[Category:Stub Docs]]
Convert a stream of unpacked bytes or shorts into a stream of packed bytes or shorts.
Convert a stream of unpacked bytes or shorts into a stream of packed bytes or shorts.


This is the inverse of [[Packed to Unpacked]]
This is the inverse of [[Packed to Unpacked]]


The low bits are extracted from each input byte or short. These bits are then packed densely into the output bytes or shorts, such that all 8 or 16 bits of the output bytes or shorts are filled with valid input bits.
The low bits are extracted from each input byte or short. These bits are then packed densely into the output bytes or shorts, such that all 8 or 16 bits of the output bytes or shorts are filled with valid input bits.
 
This is the template for the [[:Category:Block_Docs|"Page-per-block Docs"]].  This first section should describe what the block does and how to use it, using however many paragraphs necessary.  Note that the title of the wiki page should match the block's name in GRC, i.e. the one defined in the block's .grc file.  Look at the [[FFT]] Block for a good example.
 
As this is a basic template, it's also in the [[:Category:Stub_Docs|"Stub Docs category"]]. Please improve it.


== Parameters ==
== Parameters ==
(''R''): <span class="plainlinks">[https://wiki.gnuradio.org/index.php/GNURadioCompanion#Variable_Controls ''Run-time adjustable'']</span>
; Bits per Chunk
: Number of bits to pack into each group


; Param 1 (''R'')
; Endianness
: Description of parameter, provide any tips or recommended values.  Note that the name of the parameter above should match the param's label that shows up in grc (e.g. Sample Rate).
: Most or Least Significant Bit first


; Param 2
; Num Ports
: blah blah blah
: Number of input streams to operate on


== Example Flowgraph ==
== Example Flowgraph ==

Revision as of 04:39, 20 July 2019

Convert a stream of unpacked bytes or shorts into a stream of packed bytes or shorts.

This is the inverse of Packed to Unpacked

The low bits are extracted from each input byte or short. These bits are then packed densely into the output bytes or shorts, such that all 8 or 16 bits of the output bytes or shorts are filled with valid input bits.

Parameters

Bits per Chunk
Number of bits to pack into each group
Endianness
Most or Least Significant Bit first
Num Ports
Number of input streams to operate on

Example Flowgraph

Insert description of flowgraph here, then show a screenshot of the flowgraph and the output if there is an interesting GUI. Currently we have no standard method of uploading the actual flowgraph to the wiki or git repo, unfortunately. The plan is to have an example flowgraph showing how the block might be used, for every block, and the flowgraphs will live in the git repo.

Fft-ex.png

Fft-ex-output.png

Source Files

C++ files
Complex input
Real input
Core algorithms
Header files
Complex input
Real input
Public header files
Complex input
Real input
Block definition
GRC yaml
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