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/* $OpenBSD: afile.h,v 1.2 2020/02/09 19:58:17 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 AFILE_H
#define AFILE_H
#include <sys/types.h>
#include "dsp.h"
struct afile {
struct aparams par; /* file params */
#define AFILE_FMT_PCM 0 /* integers (fixed point) */
#define AFILE_FMT_ULAW 1 /* 8-bit mu-law */
#define AFILE_FMT_ALAW 2 /* 8-bit a-law */
#define AFILE_FMT_FLOAT 3 /* IEEE 754 32-bit floats */
int fmt; /* one of above */
int rate; /* file sample rate */
int nch; /* file channel count */
#define AFILE_HDR_AUTO 0 /* guess from file name */
#define AFILE_HDR_RAW 1 /* headerless aka "raw" file */
#define AFILE_HDR_WAV 2 /* microsoft .wav */
#define AFILE_HDR_AIFF 3 /* apple .aiff */
#define AFILE_HDR_AU 4 /* sun/next .au */
int hdr; /* header type */
int fd; /* file descriptor */
#define AFILE_FREAD 1 /* open for reading */
#define AFILE_FWRITE 2 /* open for writing */
int flags; /* bitmap of above */
off_t curpos; /* read/write position (bytes) */
off_t startpos; /* where payload starts */
off_t endpos; /* where payload ends */
off_t maxpos; /* max allowed pos (.wav limitation) */
char *path; /* file name (debug only) */
};
int afile_open(struct afile *, char *, int, int, struct aparams *, int, int);
size_t afile_read(struct afile *, void *, size_t);
size_t afile_write(struct afile *, void *, size_t);
int afile_seek(struct afile *, off_t);
void afile_close(struct afile *);
#endif /* !defined(AFILE_H) */
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