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/* $OpenBSD: audio_if.h,v 1.3 1996/03/02 00:29:20 niklas Exp $ */
/* $NetBSD: audio_if.h,v 1.6 1995/12/24 02:30:58 mycroft Exp $ */
/*
* Copyright (c) 1994 Havard Eidnes.
* All rights reserved.
*
* 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.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the Computer Systems
* Engineering Group at Lawrence Berkeley Laboratory.
* 4. Neither the name of the University nor of the Laboratory may be used
* to endorse or promote products derived from this software without
* specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
*
*/
/*
* Generic interface to hardware driver.
*/
struct audio_hw_if {
int (*open)__P((dev_t, int)); /* open hardware */
void (*close)__P((void *)); /* close hardware */
int (*drain)__P((void *)); /* Optional: drain buffers */
/* Sample rate */
int (*set_in_sr)__P((void *, u_long));
u_long (*get_in_sr)__P((void *));
int (*set_out_sr)__P((void *, u_long));
u_long (*get_out_sr)__P((void *));
/* Encoding. */
/* XXX should we have separate in/out? */
int (*query_encoding)__P((void *, struct audio_encoding *));
int (*set_encoding)__P((void *, u_int));
int (*get_encoding)__P((void *));
/* Precision = bits/sample, usually 8 or 16 */
/* XXX should we have separate in/out? */
int (*set_precision)__P((void *, u_int));
int (*get_precision)__P((void *));
/* Channels - mono(1), stereo(2) */
int (*set_channels)__P((void *, int));
int (*get_channels)__P((void *));
/* Hardware may have some say in the blocksize to choose */
int (*round_blocksize)__P((void *, int));
/* Ports (in/out ports) */
int (*set_out_port)__P((void *, int));
int (*get_out_port)__P((void *));
int (*set_in_port)__P((void *, int));
int (*get_in_port)__P((void *));
/*
* Changing settings may require taking device out of "data mode",
* which can be quite expensive. Also, audiosetinfo() may
* change several settings in quick succession. To avoid
* having to take the device in/out of "data mode", we provide
* this function which indicates completion of settings
* adjustment.
*/
int (*commit_settings)__P((void *));
/* Return silence value for encoding */
u_int (*get_silence)__P((int));
/* Software en/decode functions, set if SW coding required by HW */
void (*sw_encode)__P((void *, int, u_char *, int));
void (*sw_decode)__P((void *, int, u_char *, int));
/* Start input/output routines. These usually control DMA. */
int (*start_output)__P((void *, void *, int, void (*)(), void *));
int (*start_input)__P((void *, void *, int, void (*)(), void *));
int (*halt_output)__P((void *));
int (*halt_input)__P((void *));
int (*cont_output)__P((void *));
int (*cont_input)__P((void *));
int (*speaker_ctl)__P((void *, int));
#define SPKR_ON 1
#define SPKR_OFF 0
int (*getdev)__P((void *, struct audio_device *));
int (*setfd)__P((void *, int));
/* Mixer (in/out ports) */
int (*set_port)__P((void *, mixer_ctrl_t *));
int (*get_port)__P((void *, mixer_ctrl_t *));
int (*query_devinfo)__P((void *, mixer_devinfo_t *));
int full_duplex; /* non-null if HW is able to do full-duplex */
int audio_unit;
};
/* Register / deregister hardware driver */
extern int audio_hardware_attach __P((struct audio_hw_if *, void *));
extern int audio_hardware_detach __P((struct audio_hw_if *));
/* Device identity flags */
#define SOUND_DEVICE 0
#define AUDIO_DEVICE 0x80
#define MIXER_DEVICE 0x10
#define ISDEVAUDIO(x) ((minor(x)&0xf0) == AUDIO_DEVICE)
#define ISDEVSOUND(x) ((minor(x)&0xf0) == SOUND_DEVICE)
#define ISDEVMIXER(x) ((minor(x)&0xf0) == MIXER_DEVICE)
#define AUDIOUNIT(x) (minor(x)&0x0f)
#define AUDIODEV(x) (minor(x)&0xf0)
#define splaudio splbio /* XXX */
#define IPL_AUDIO IPL_BIO /* XXX */
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