Packed to Unpacked: Difference between revisions
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[[Category:Block Docs]] | [[Category:Block Docs]] | ||
Converts a stream of packed bytes or | Converts a stream of packed bytes, shorts or ints into a stream of unpacked bytes, shorts or ints. | ||
This is the inverse of [[Unpacked to Packed]] | This is the inverse of [[Unpacked to Packed]] | ||
The bits in the | The bits in the input stream are separated into groups of bits according to the number of bits per chunk. All 8, 16 or 32 bits of the each input are processed. The resulting chunk is written right-justified to the output stream of bytes, shorts or ints. | ||
The combination of this block followed by [[Chunks to Symbols]] handles the general case of mapping from a stream of bytes or shorts into arbitrary float or complex symbols. | The combination of this block followed by [[Chunks to Symbols]] handles the general case of mapping from a stream of bytes or shorts into arbitrary float or complex symbols. | ||
== Parameters == | == Parameters == | ||
; | ; Bits per Chunk | ||
: How many bits to include in each output byte/short | : How many bits to include in each output byte/short/int | ||
; | ; Endianness | ||
: Whether to start with the MSB or LSB when processing the input bits | : Whether to start with the MSB or LSB when processing the input bits | ||
| Line 27: | Line 27: | ||
output : 0b00000001 0b00000001 0b00000001 0b00000001 0b00000000 0b00000000 0b00000000 0b00000000 | output : 0b00000001 0b00000001 0b00000001 0b00000001 0b00000000 0b00000000 0b00000000 0b00000000 | ||
== Source Files == | |||
; C++ files | |||
: [https://github.com/gnuradio/gnuradio/blob/main/gr-blocks/lib/packed_to_unpacked_impl.cc packed_to_unpacked_impl.cc] | |||
; Header files | |||
: [https://github.com/gnuradio/gnuradio/blob/main/gr-blocks/lib/packed_to_unpacked_impl.h packed_to_unpacked_impl.h] | |||
; Public header files | |||
: [https://github.com/gnuradio/gnuradio/blob/main/gr-blocks/include/gnuradio/blocks/packed_to_unpacked.h packed_to_unpacked.h] | |||
; Block definition | |||
: [https://github.com/gnuradio/gnuradio/blob/main/gr-blocks/grc/blocks_packed_to_unpacked_xx.block.yml blocks_packed_to_unpacked_xx.block.yml] | |||
Latest revision as of 18:05, 18 May 2024
Converts a stream of packed bytes, shorts or ints into a stream of unpacked bytes, shorts or ints.
This is the inverse of Unpacked to Packed
The bits in the input stream are separated into groups of bits according to the number of bits per chunk. All 8, 16 or 32 bits of the each input are processed. The resulting chunk is written right-justified to the output stream of bytes, shorts or ints.
The combination of this block followed by Chunks to Symbols handles the general case of mapping from a stream of bytes or shorts into arbitrary float or complex symbols.
Parameters
- Bits per Chunk
- How many bits to include in each output byte/short/int
- Endianness
- Whether to start with the MSB or LSB when processing the input bits
- Number of Ports
- Number of input and output ports, in case you need multiple parallel streams
Example Flowgraph
(This is not actually a flowgraph, it's just an example of the block being used)
If bits_per_chunk = 1 and MSB is selected,
input : 0b11110000
output : 0b00000001 0b00000001 0b00000001 0b00000001 0b00000000 0b00000000 0b00000000 0b00000000
Source Files
- C++ files
- packed_to_unpacked_impl.cc
- Header files
- packed_to_unpacked_impl.h
- Public header files
- packed_to_unpacked.h
- Block definition
- blocks_packed_to_unpacked_xx.block.yml