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/* $OpenBSD: audio_if.h,v 1.26 2008/04/21 00:32:42 jakemsr 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_
/*
* Generic interface to hardware driver.
*/
struct audio_softc;
struct audio_device;
struct audio_encoding;
struct mixer_devinfo;
struct mixer_ctrl;
struct audio_params {
u_long sample_rate; /* sample rate */
u_int encoding; /* mu-law, linear, etc */
u_int precision; /* bits/sample */
u_int channels; /* mono(1), stereo(2) */
/* Software en/decode functions, set if SW coding required by HW */
void (*sw_code)(void *, u_char *, int);
int factor; /* coding space change */
};
/* The default audio mode: 8 kHz mono mu-law */
extern struct audio_params audio_default;
struct audio_hw_if {
int (*open)(void *, int); /* open hardware */
void (*close)(void *); /* close hardware */
int (*drain)(void *); /* Optional: drain buffers */
/* Encoding. */
/* XXX should we have separate in/out? */
int (*query_encoding)(void *, struct audio_encoding *);
/* 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
int (*getdev)(void *, struct audio_device *);
int (*setfd)(void *, int);
/* 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);
paddr_t (*mappage)(void *, void *, off_t, int);
int (*get_props)(void *); /* device properties */
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 (*get_default_params)(void *, int, struct audio_params *);
};
struct audio_attach_args {
int type;
void *hwif; /* either audio_hw_if * or midi_hw_if * */
void *hdl;
};
#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(struct audio_hw_if *, void *, struct device *);
int audioprint(void *, const char *);
/* Device identity flags */
#define SOUND_DEVICE 0
#define AUDIO_DEVICE 0x80
#define AUDIOCTL_DEVICE 0xc0
#define MIXER_DEVICE 0x10
#define AUDIOUNIT(x) (minor(x)&0x0f)
#define AUDIODEV(x) (minor(x)&0xf0)
#define ISDEVSOUND(x) (AUDIODEV((x)) == SOUND_DEVICE)
#define ISDEVAUDIO(x) (AUDIODEV((x)) == AUDIO_DEVICE)
#define ISDEVAUDIOCTL(x) (AUDIODEV((x)) == AUDIOCTL_DEVICE)
#define ISDEVMIXER(x) (AUDIODEV((x)) == MIXER_DEVICE)
/*
* USB Audio specification defines 12 channels:
* L R C LFE Ls Rs Lc Rc S Sl Sr T
*/
#define AUDIO_MAX_CHANNELS 12
#endif /* _SYS_DEV_AUDIO_IF_H_ */
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