#include "dsd.h"
#include "p25p1_hdu.h"
#include "p25p1_const.h"
#include "p25p1_heuristics.h"

Functions
void	process_IMBE (dsd_opts opts, dsd_state state, int *status_count)
void	read_and_correct_hex_word (dsd_opts opts, dsd_state state, char hex, int status_count, AnalogSignal analog_signal_array, int analog_signal_index)
void	correct_hamming_dibits (char hex_data, int hex_count, AnalogSignal analog_signal_array)

Function Documentation

◆ correct_hamming_dibits()

Correct the information in analog_signal_array according with the content of data, which has been error corrected and should be valid.

Parameters

Dibits	that have already been error corrected and we trust are correct. \count Number of dibits.
analog_signal_array	Pointer to a sequence of AnalogSignal elements, as many as the value of count.

Separate imbe frames and deinterleave. This important methods read the IMBE data from the stream and passes it to the vocoder to produce audio.

Parameters

opts	The DSD options.
state	The DSD state. \status_count An index that allows us to skip the status words interleaved every 36 dibit in the data stream.

Referenced by process_IMBE().

void read_and_correct_hex_word	(	dsd_opts *	opts,
		dsd_state *	state,
		char *	hex,
		int *	status_count,
		AnalogSignal *	analog_signal_array,
		int *	analog_signal_index )

Reads an hex word, its parity bits and attempts to error correct it using the Hamming FEC.

Parameters

opts	The DSD options.
state	The DSD state.
hex	Pointer where to store the read hex word. Six bytes, one per bit.
status_count	An index that allows us to skip the status words interleaved every 36 dibit in the data stream.
analog_singal_array	Pointer to a sequence of AnalogSignal elements.
analog_signal_index	The current index in the analog_singal_array. This value is increased on each dibit read.