Unpacked to Packed: Difference between revisions

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== Example Flowgraph ==
== 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.
[[File:Fft-ex.png|700px]]
[[File:Fft-ex-output.png|700px]]


== Source Files ==
== Source Files ==
; C++ files
: [https://github.com/gnuradio/gnuradio/blob/master/gr-fft/lib/fft_vcc_fftw.cc Complex input]
: [https://github.com/gnuradio/gnuradio/blob/master/gr-fft/lib/fft_vfc_fftw.cc Real input]
: [https://github.com/gnuradio/gnuradio/blob/master/gr-fft/lib/fft.cc Core algorithms]
; Header files
: [https://github.com/gnuradio/gnuradio/blob/master/gr-fft/lib/fft_vcc_fftw.h Complex input]
: [https://github.com/gnuradio/gnuradio/blob/master/gr-fft/lib/fft_vfc_fftw.h Real input]
; Public header files
: [https://github.com/gnuradio/gnuradio/blob/master/gr-fft/include/gnuradio/fft/fft_vcc.h Complex input]
: [https://github.com/gnuradio/gnuradio/blob/master/gr-fft/include/gnuradio/fft/fft_vfc.h Real input ]
; Block definition
: [https://github.com/gnuradio/gnuradio/blob/master/gr-fft/grc/fft_fft_vxx.block.yml GRC yaml]

Revision as of 04:40, 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

Source Files

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