toaruos/apps/play.c

/**
 * @brief play - Play back PCM samples
 *
 * This needs very specifically-formatted PCM data to function
 * properly - 16-bit, signed, stereo, little endian, and 48KHz.
 *
 * TODO This should be fixed up to play back WAV files properly.
 *      We have a sample rate convert in the out-of-repo playmp3
 *
 * @copyright
 * This file is part of ToaruOS and is released under the terms
 * of the NCSA / University of Illinois License - see LICENSE.md
 * Copyright (C) 2015-2018 K. Lange
 */

#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <fcntl.h>

#include <sys/ioctl.h>

int main(int argc, char * argv[]) {
	int spkr = open("/dev/dsp", O_WRONLY);
	int song;
	if (!strcmp(argv[1], "-")) {
		song = STDIN_FILENO;
	} else {
		song = open(argv[1], O_RDONLY);
	}

	if (spkr == -1) {
		fprintf(stderr, "no dsp\n");
		return 1;
	}

	if (song == -1) {
		fprintf(stderr, "audio file not found\n");
		return 2;
	}

	char buf[0x1000];
	int r;
	while ((r = read(song, buf, sizeof(buf)))) {
		write(spkr, buf, r);
	}
	return 0;
}