gsmhr_decoder_twts002_in(): set BFI=1 SID=1 for invalid SID When a received TW-TS-002 RTP payload indicates invalid SID, which of the 3 possible BFI/SID combinations should we pass to our internal ETSI-based speech decoder or TFO engine? Our original code passed BFI=0 SID=1, but upon further reflection, BFI=1 SID=1 is a better choice. In the corner case where received invalid SID is fed to a full decoder in homed state, setting BFI=1 allows that decoder to emit zeros on PCM and stay homed, instead of launching into full decoding.

/*
 * This module contains our gsmfr_0610_decode_frame() function, which is
 * the primary (most common, most useful) interface to our GSM 06.10 decoder.
 */

#include <stdint.h>
#include "tw_gsmfr.h"

void gsmfr_0610_decode_frame(struct gsmfr_0610_state *st, const uint8_t *frame,
			     int16_t *pcm_out)
{
	struct gsmfr_param_frame param;

	gsmfr_unpack_frame(frame, &param);
	gsmfr_0610_decode_params(st, &param, pcm_out);
}