/*
 * This utility reads an extended-libgsm file that may contain SID frames
 * and BFI markers, passes it through our preprocessor and writes out
 * pure libgsm frames.
 */

#include <stdio.h>
#include <stdint.h>
#include <stdlib.h>
#include "../libgsmfr2/tw_gsmfr.h"
#include "../libtest/binreader.h"

main(argc, argv)
	char **argv;
{
	FILE *bini, *bino;
	struct gsmfr_preproc_state *pp_state;
	uint8_t frame[BINFILE_MAX_FRAME];
	int rc, bfi, taf;

	if (argc != 3) {
		fprintf(stderr, "usage: %s input.gsmx output.gsm\n", argv[0]);
		exit(1);
	}
	bini = fopen(argv[1], "r");
	if (!bini) {
		perror(argv[1]);
		exit(1);
	}
	bino = fopen(argv[2], "w");
	if (!bino) {
		perror(argv[2]);
		exit(1);
	}
	pp_state = gsmfr_preproc_create();
	if (!pp_state) {
		fprintf(stderr, "gsmfr_preproc_create() failed!\n");
		exit(1);
	}
	for (;;) {
		rc = binfile_read_frame(bini, frame);
		if (rc < 0) {
			fprintf(stderr, "error: garbage in %s\n", argv[1]);
			exit(1);
		}
		if (!rc)
			break;
		if (frame[0] == 0xBF) {
			bfi = 1;
			taf = frame[1] & 1;
		} else if ((frame[0] & 0xF0) == 0xD0)
			bfi = 0;
		else {
			fprintf(stderr, "error: %s is not in FR codec format\n",
				argv[1]);
			exit(1);
		}
		if (bfi)
			gsmfr_preproc_bfi(pp_state, taf, frame);
		else
			gsmfr_preproc_good_frame(pp_state, frame);
		fwrite(frame, 1, 33, bino);
	}
	fclose(bino);
	exit(0);
}