usr.sbin/virtual_oss/virtual_oss/backend.h

root/usr.sbin/virtual_oss/virtual_oss/backend.h
/*-
 * SPDX-License-Identifier: BSD-2-Clause
 *
 * Copyright (c) 2015 Hans Petter Selasky
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#ifndef _VIRTUAL_BACKEND_H_
#define _VIRTUAL_BACKEND_H_

struct voss_backend {
        int (*open)(struct voss_backend *, const char *, int, int, int *, int *);
        void (*close)(struct voss_backend *);
        int (*transfer)(struct voss_backend *, void *, int);
        void (*delay)(struct voss_backend *, int *);
        void *arg;
        int fd;
};

/* Currently selected backends */
extern struct voss_backend *voss_rx_backend;
extern struct voss_backend *voss_tx_backend;

/* Available backends */
/* XXX Get rid somehow? */
extern struct voss_backend voss_backend_null_rec;
extern struct voss_backend voss_backend_null_play;
extern struct voss_backend voss_backend_oss_rec;
extern struct voss_backend voss_backend_oss_play;
extern struct voss_backend voss_backend_bt_rec;
extern struct voss_backend voss_backend_bt_play;
extern struct voss_backend voss_backend_sndio_rec;
extern struct voss_backend voss_backend_sndio_play;

#endif                  /* _VIRTUAL_BACKEND_H_ */
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