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/* $OpenBSD: audio_if.h,v 1.41 2022/10/28 15:13:59 kn Exp $ */
/* $NetBSD: audio_if.h,v 1.24 1998/01/10 14:07:25 tv 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.
*
*/
#ifndef _SYS_DEV_AUDIO_IF_H_
#define _SYS_DEV_AUDIO_IF_H_
#include <sys/mutex.h>
#define AUDIO_BPS(bits) (bits) <= 8 ? 1 : ((bits) <= 16 ? 2 : 4)
/*
* Generic interface to hardware driver.
*/
struct mixer_devinfo;
struct mixer_ctrl;
struct audio_params {
u_long sample_rate; /* sample rate */
#define AUDIO_ENCODING_NONE 0 /* no encoding assigned */
#define AUDIO_ENCODING_ULAW 1 /* ITU G.711 mu-law */
#define AUDIO_ENCODING_ALAW 2 /* ITU G.711 A-law */
#define AUDIO_ENCODING_SLINEAR_LE 6
#define AUDIO_ENCODING_SLINEAR_BE 7
#define AUDIO_ENCODING_ULINEAR_LE 8
#define AUDIO_ENCODING_ULINEAR_BE 9
u_int encoding; /* mu-law, linear, etc */
u_int precision; /* bits/sample */
u_int bps; /* bytes/sample */
u_int msb; /* data alignment */
u_int channels; /* mono(1), stereo(2) */
};
struct audio_hw_if {
int (*open)(void *, int); /* open hardware */
void (*close)(void *); /* close hardware */
/* Set the audio encoding parameters (record and play).
* Return 0 on success, or an error code if the
* requested parameters are impossible.
* The values in the params struct may be changed (e.g. rounding
* to the nearest sample rate.)
*/
int (*set_params)(void *, int, int, struct audio_params *,
struct audio_params *);
/* Hardware may have some say in the blocksize to choose */
int (*round_blocksize)(void *, int);
/*
* 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)(void *);
/* Start input/output routines. These usually control DMA. */
int (*init_output)(void *, void *, int);
int (*init_input)(void *, void *, int);
int (*start_output)(void *, void *, int, void (*)(void *), void *);
int (*start_input)(void *, void *, int, void (*)(void *), void *);
int (*halt_output)(void *);
int (*halt_input)(void *);
int (*speaker_ctl)(void *, int);
#define SPKR_ON 1
#define SPKR_OFF 0
/* Mixer (in/out ports) */
int (*set_port)(void *, struct mixer_ctrl *);
int (*get_port)(void *, struct mixer_ctrl *);
int (*query_devinfo)(void *, struct mixer_devinfo *);
/* Allocate/free memory for the ring buffer. Usually malloc/free. */
/* The _old interfaces have been deprecated and will not be
called in newer kernels if the new interfaces are present */
void *(*allocm)(void *, int, size_t, int, int);
void (*freem)(void *, void *, int);
size_t (*round_buffersize)(void *, int, size_t);
int (*trigger_output)(void *, void *, void *, int,
void (*)(void *), void *, struct audio_params *);
int (*trigger_input)(void *, void *, void *, int,
void (*)(void *), void *, struct audio_params *);
void (*copy_output)(void *, size_t);
void (*underrun)(void *);
unsigned int (*set_blksz)(void *, int,
struct audio_params *, struct audio_params *, unsigned int);
unsigned int (*set_nblks)(void *, int,
struct audio_params *, unsigned int, unsigned int);
};
struct audio_attach_args {
int type;
const void *hwif; /* either audio_hw_if * or midi_hw_if * */
void *hdl;
void *cookie;
};
#define AUDIODEV_TYPE_AUDIO 0
#define AUDIODEV_TYPE_MIDI 1
#define AUDIODEV_TYPE_OPL 2
#define AUDIODEV_TYPE_MPU 3
#define AUDIODEV_TYPE_RADIO 4
/* Attach the MI driver(s) to the MD driver. */
struct device *audio_attach_mi(const struct audio_hw_if *, void *, void *,
struct device *);
int audioprint(void *, const char *);
int audio_blksz_bytes(int,
struct audio_params *, struct audio_params *, int);
extern struct mutex audio_lock;
#endif /* _SYS_DEV_AUDIO_IF_H_ */
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