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/* $OpenBSD: wav.h,v 1.11 2010/07/31 08:48:01 ratchov Exp $ */
/*
* Copyright (c) 2008 Alexandre Ratchov <alex@caoua.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#ifndef WAV_H
#define WAV_H
#include <sys/types.h>
#include "aparams.h"
#include "pipe.h"
struct wav {
struct pipe pipe;
#define HDR_AUTO 0 /* guess by looking at the file name */
#define HDR_RAW 1 /* no headers, ie openbsd native ;-) */
#define HDR_WAV 2 /* microsoft riff wave */
unsigned hdr; /* HDR_RAW or HDR_WAV */
unsigned xrun; /* xrun policy */
struct aparams hpar; /* parameters to write on the header */
off_t rbytes; /* bytes to read, -1 if no limit */
off_t wbytes; /* bytes to write, -1 if no limit */
off_t startpos; /* beginning of the data chunk */
off_t endpos; /* end of the data chunk */
off_t mmcpos; /* play/rec start point set by MMC */
short *map; /* mulaw/alaw -> s16 conversion table */
int slot; /* mixer ctl slot number */
int mmc; /* use MMC control */
int join; /* join/expand channels */
unsigned vol; /* current volume */
unsigned maxweight; /* dynamic range when vol == 127 */
#define WAV_INIT 0 /* not trying to do anything */
#define WAV_START 1 /* buffer allocated */
#define WAV_READY 2 /* buffer filled enough */
#define WAV_RUN 3 /* buffer attached to device */
#define WAV_FAILED 4 /* failed to seek */
unsigned pstate; /* one of above */
unsigned mode; /* bitmap of MODE_* */
struct dev *dev; /* device playing or recording */
};
extern struct fileops wav_ops;
struct wav *wav_new_in(struct fileops *, struct dev *,
unsigned, char *, unsigned, struct aparams *, unsigned, unsigned, int, int);
struct wav *wav_new_out(struct fileops *, struct dev *,
unsigned, char *, unsigned, struct aparams *, unsigned, int, int);
unsigned wav_read(struct file *, unsigned char *, unsigned);
unsigned wav_write(struct file *, unsigned char *, unsigned);
void wav_close(struct file *);
int wav_readhdr(int, struct aparams *, off_t *, off_t *, short **);
int wav_writehdr(int, struct aparams *, off_t *, off_t);
void wav_conv(unsigned char *, unsigned, short *);
extern short wav_ulawmap[256];
extern short wav_alawmap[256];
#endif /* !defined(WAV_H) */
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