/*
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation. See the file COPYING
 *
 * 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.
 *
 * Copyright (C) 2017 Frank van Maarseveen <frankvm@frankvm.com>
 */

#ifndef _ALSA_H_
#define _ALSA_H_

#include "common.h"

#define PLAY_RATE		48000
#define PLAY_CHANNELS		2
#define PLAY_BYTES		2
#define PLAY_FRAMESIZE		(PLAY_CHANNELS * PLAY_BYTES)
#define PLAY_CHUNKSIZE		350
#define PLAY_CHUNKBYTES		(PLAY_CHUNKSIZE * PLAY_FRAMESIZE)	// 1400 bytes
#define PLAY_NVOL		4

struct play_param {
	const char *		volume;
	int			bufferframes;
};

void	alsa_open(const char *device, const struct play_param *p);
void	alsa_volume(uint16_t vol);
void	alsa_write(const void *chunk, int size);
void	alsa_resync(void);
int	alsa_syncadj(void);
void	alsa_suspend(void);
void	alsa_resume(void);
void	alsa_close(void);

#endif