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 program generates a binary file of 256 bytes, containing every
 * possible octet value in linearly increasing order.  The purpose of this
 * datum is testing of A-linear-A and mu-linear-mu PCM conversions: we need
 * to ensure that each of those sequences is an identity transform for all
 * possible PCM octet values.
 */

#include <stdio.h>
#include <stdlib.h>

main(argc, argv)
	char **argv;
{
	FILE *outf;
	unsigned val;

	if (argc != 2) {
		fprintf(stderr, "usage: %s output-bin-file\n", argv[0]);
		exit(1);
	}
	outf = fopen(argv[1], "w");
	if (!outf) {
		perror(argv[1]);
		exit(1);
	}
	for (val = 0; val < 256; val++)
		putc(val, outf);
	fclose(outf);
	exit(0);
}