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 header file defines the interface to our reader function for binary
 * files recording GSM FR or EFR streams, see ../doc/Binary-file-format.
 *
 * binfile_read_frame() return values are:
 *  1 = successfully read valid frame
 *  0 = normal EOF
 * -1 = unrecognized header byte
 * -2 = EOF in the middle of a frame
 */

#define	BINFILE_MAX_FRAME	33

extern int binfile_read_frame(FILE *binf, uint8_t *frame);