/*      $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) */