/*
 * This program reads a 16-bit linear PCM speech recording in WAV format
 * and converts it to raw format, either BE or LE.
 */

#include <stdio.h>
#include <stdint.h>
#include <stdlib.h>
#include <string.h>
#include <strings.h>
#include "../libtest/wavreader.h"
#include "../libtest/wavrdhelp.h"

main(argc, argv)
	char **argv;
{
	int big_endian;
	void *wav;
	FILE *outf;
	int16_t pcm[160], samp;
	uint8_t bytes[320], *dp;
	int cc, rc, i;

	if (argc != 4) {
usage:		fprintf(stderr, "usage: %s input.wav output.raw be|le\n",
			argv[0]);
		exit(1);
	}
	if (!strcmp(argv[3], "be"))
		big_endian = 1;
	else if (!strcmp(argv[3], "le"))
		big_endian = 0;
	else
		goto usage;
	wav = wav_read_open(argv[1]);
	if (!wav) {
		perror(argv[1]);
		exit(1);
	}
	rc = wavrd_check_header(wav, argv[1]);
	if (rc < 0)
		exit(1);	/* error msg already printed */
	outf = fopen(argv[2], "w");
	if (!outf) {
		perror(argv[2]);
		exit(1);
	}
	for (;;) {
		cc = wavrd_get_pcm_block(wav, pcm);
		if (!cc)
			break;
		dp = bytes;
		for (i = 0; i < cc; i++) {
			samp = pcm[i];
			if (big_endian) {
				*dp++ = (samp >> 8) & 0xFF;
				*dp++ = samp & 0xFF;
			} else {
				*dp++ = samp & 0xFF;
				*dp++ = (samp >> 8) & 0xFF;
			}
		}
		fwrite(bytes, 2, cc, outf);
	}
	fclose(outf);
	exit(0);
}