Packed to Unpacked

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