path: root/src/pcm_utils.h

/* the Music Player Daemon (MPD)
 * Copyright (C) 2003-2007 by Warren Dukes (warren.dukes@gmail.com)
 * This project's homepage is: http://www.musicpd.org
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

#ifndef MPD_PCM_UTILS_H
#define MPD_PCM_UTILS_H

#include <glib.h>

#include <stdint.h>

/**
 * Check if the value is within the range of the provided bit size,
 * and caps it if necessary.
 */
static inline int32_t
pcm_range(int32_t sample, unsigned bits)
{
	if (G_UNLIKELY(sample < (-1 << (bits - 1))))
		return -1 << (bits - 1);
	if (G_UNLIKELY(sample >= (1 << (bits - 1))))
		return (1 << (bits - 1)) - 1;
	return sample;
}

#endif