/*
 * gsmfr-decode-rb is a "raw basic" decoder: only the basic GSM 06.10 decoder
 * is applied (no Rx DTX preprocessor), and the output format is raw BE.
 */

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

main(argc, argv)
	char **argv;
{
	FILE *binf, *outf;
	struct gsmfr_0610_state *dec_state;
	uint8_t frame[BINFILE_MAX_FRAME];
	int16_t pcm[160];
	int rc;

	if (argc != 3) {
		fprintf(stderr, "usage: %s input.gsm output.robe\n", argv[0]);
		exit(1);
	}
	binf = fopen(argv[1], "r");
	if (!binf) {
		perror(argv[1]);
		exit(1);
	}
	outf = fopen(argv[2], "w");
	if (!outf) {
		perror(argv[2]);
		exit(1);
	}
	dec_state = gsmfr_0610_create();
	if (!dec_state) {
		fprintf(stderr, "gsmfr_0610_create() failed!\n");
		exit(1);
	}
	for (;;) {
		rc = binfile_read_frame(binf, frame);
		if (rc < 0) {
			fprintf(stderr, "error: garbage in %s\n", argv[1]);
			exit(1);
		}
		if (!rc)
			break;
		if (frame[0] == 0xBF) {
			fprintf(stderr, "error: %s contains disallowed BFI\n",
				argv[1]);
			exit(1);
		}
		if ((frame[0] & 0xF0) != 0xD0) {
			fprintf(stderr, "error: %s is not in FR codec format\n",
				argv[1]);
			exit(1);
		}
		gsmfr_0610_decode_frame(dec_state, frame, pcm);
		write_pcm_to_robe(outf, pcm);
	}
	fclose(outf);
	exit(0);
}