/*
 * This file is the main module for gsmfr-decode utility.
 */

#include <stdio.h>
#include <stdint.h>
#include <stdlib.h>
#include <gsm.h>
#include "../libgsmfrp/gsm_fr_preproc.h"
#include "../libtest/binreader.h"
#include "../libtest/wavwriter.h"
#include "../libtest/pcmwrite.h"

main(argc, argv)
	char **argv;
{
	FILE *binf;
	void *wav;
	gsm dec_state;
	struct gsmfr_preproc_state *pp_state;
	uint8_t frame[BINFILE_MAX_FRAME];
	int16_t pcm[160];
	int rc, bfi, taf;

	if (argc != 3) {
		fprintf(stderr, "usage: %s input.gsm output.wav\n", argv[0]);
		exit(1);
	}
	binf = fopen(argv[1], "r");
	if (!binf) {
		perror(argv[1]);
		exit(1);
	}
	wav = wav_write_open(argv[2], 8000, 16, 1);
	if (!wav) {
		perror(argv[2]);
		exit(1);
	}
	dec_state = gsm_create();
	if (!dec_state) {
		fprintf(stderr, "gsm_create() failed!\n");
		exit(1);
	}
	pp_state = gsmfr_preproc_create();
	if (!pp_state) {
		fprintf(stderr, "gsmfr_preproc_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) {
			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);
		gsm_decode(dec_state, frame, pcm);
		write_pcm_to_wav(wav, pcm);
	}
	wav_write_close(wav);
	exit(0);
}