libgsmhr1 TFO: require BFI=0 and SID=0 for homing In order for a received frame to be recognized as DHF, we need not only the correct bit pattern, but also BFI=0 and SID=0. The BFI=0 requirement should be obvious, while the SID=0 requirement is needed only for HR codec. With FR and EFR, SID classification comes from the payload bits and no separate check is needed - but in HR we get an out-of-band SID ternary flag. When SID=1, no payload bits are used at all; when SID=2, we use only the first 33 bits of the payload. Therefore, it is proper to conditionalize DHF acceptance on SID=0. We already implemented this logic in the just finished full decoder; now bring TFO code into agreement.

/*
 * This C module provides some common tables for AMR parsing programs.
 */

#include "amr_defs.h"

char *amr_mode_names[16] = {
	"MR475",
	"MR515",            
	"MR59",
	"MR67",
	"MR74",
	"MR795",
	"MR102",
	"MR122",            
	"SID",
	"EFR-SID",
	"TDMA-SID",
	"PDC-SID",
	"InvalidC",
	"InvalidD",
	"InvalidE",
	"NO_DATA"
};

unsigned amr_bit_lengths[9] = {
	AMR_NBITS_475,
	AMR_NBITS_515,
	AMR_NBITS_59,
	AMR_NBITS_67,
	AMR_NBITS_74,
	AMR_NBITS_795,
	AMR_NBITS_102,
	AMR_NBITS_122,
	AMR_NBITS_SID
};