input: stream of unsigned char; output: stream of unsigned char. More...
#include <gr_unpacked_to_packed_bb.h>
Public Member Functions | |
void | forecast (int noutput_items, gr_vector_int &ninput_items_required) |
Estimate input requirements given output request. | |
int | general_work (int noutput_items, gr_vector_int &ninput_items, gr_vector_const_void_star &input_items, gr_vector_void_star &output_items) |
compute output items from input items | |
bool | check_topology (int ninputs, int noutputs) |
Confirm that ninputs and noutputs is an acceptable combination. | |
Friends | |
gr_unpacked_to_packed_bb_sptr | gr_make_unpacked_to_packed_bb (unsigned int bits_per_chunk, gr_endianness_t endianness) |
input: stream of unsigned char; output: stream of unsigned char.
This is the inverse of gr_packed_to_unpacked_XX.
The low bits_per_chunk
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 right thing is done if bits_per_chunk is not a power of two.
The combination of gr_packed_to_unpacked_XX followed by gr_chunks_to_symbols_Xf or gr_chunks_to_symbols_Xc handles the general case of mapping from a stream of bytes or shorts into arbitrary float or complex symbols.
gr_packed_to_unpacked_ss, gr_unpacked_to_packed_ss,
bool gr_unpacked_to_packed_bb::check_topology | ( | int | ninputs, | |
int | noutputs | |||
) | [inline, virtual] |
Confirm that ninputs and noutputs is an acceptable combination.
Reimplemented from gr_basic_block.
void gr_unpacked_to_packed_bb::forecast | ( | int | noutput_items, | |
gr_vector_int & | ninput_items_required | |||
) | [virtual] |
Estimate input requirements given output request.
noutput_items | number of output items to produce | |
ninput_items_required | number of input items required on each input stream |
noutput_items
, estimate the number of data items required on each input stream. The estimate doesn't have to be exact, but should be close.
Reimplemented from gr_block.
int gr_unpacked_to_packed_bb::general_work | ( | int | noutput_items, | |
gr_vector_int & | ninput_items, | |||
gr_vector_const_void_star & | input_items, | |||
gr_vector_void_star & | output_items | |||
) | [virtual] |
compute output items from input items
noutput_items | number of output items to write on each output stream | |
ninput_items | number of input items available on each input stream | |
input_items | vector of pointers to the input items, one entry per input stream | |
output_items | vector of pointers to the output items, one entry per output stream |
Implements gr_block.
gr_unpacked_to_packed_bb_sptr gr_make_unpacked_to_packed_bb | ( | unsigned int | bits_per_chunk, | |
gr_endianness_t | endianness | |||
) | [friend] |