48bae9ee88
the /dev/rmidiN devices, or with a sequencer interface via /dev/music. So far the only supported MIDI device is the MPU401 port on SoundBlaster (and only on SB on isapnp, since we do not have locators with multiple values yet).
166 lines
5.9 KiB
C
166 lines
5.9 KiB
C
/* $NetBSD: audio_if.h,v 1.26 1998/08/07 00:00:58 augustss Exp $ */
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/*
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* Copyright (c) 1994 Havard Eidnes.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the Computer Systems
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* Engineering Group at Lawrence Berkeley Laboratory.
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* 4. Neither the name of the University nor of the Laboratory may be used
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* to endorse or promote products derived from this software without
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* specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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*/
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/*
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* Generic interface to hardware driver.
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*/
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struct audio_softc;
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struct audio_params {
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u_long sample_rate; /* sample rate */
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u_int encoding; /* e.g. ulaw, linear, etc */
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u_int precision; /* bits/sample */
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u_int channels; /* mono(1), stereo(2) */
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/* Software en/decode functions, set if SW coding required by HW */
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void (*sw_code)__P((void *, u_char *, int));
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int factor; /* coding space change */
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};
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/* The default audio mode: 8 kHz mono ulaw */
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extern struct audio_params audio_default;
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struct audio_hw_if {
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int (*open)__P((void *, int)); /* open hardware */
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void (*close)__P((void *)); /* close hardware */
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int (*drain)__P((void *)); /* Optional: drain buffers */
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/* Encoding. */
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/* XXX should we have separate in/out? */
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int (*query_encoding)__P((void *, struct audio_encoding *));
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/* Set the audio encoding parameters (record and play).
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* Return 0 on success, or an error code if the
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* requested parameters are impossible.
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* The values in the params struct may be changed (e.g. rounding
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* to the nearest sample rate.)
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*/
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int (*set_params)__P((void *, int, int, struct audio_params *, struct audio_params *));
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/* Hardware may have some say in the blocksize to choose */
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int (*round_blocksize)__P((void *, int));
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/*
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* Changing settings may require taking device out of "data mode",
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* which can be quite expensive. Also, audiosetinfo() may
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* change several settings in quick succession. To avoid
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* having to take the device in/out of "data mode", we provide
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* this function which indicates completion of settings
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* adjustment.
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*/
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int (*commit_settings)__P((void *));
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/* Start input/output routines. These usually control DMA. */
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int (*init_output)__P((void *, void *, int));
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int (*init_input)__P((void *, void *, int));
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int (*start_output)__P((void *, void *, int,
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void (*)(void *), void *));
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int (*start_input)__P((void *, void *, int,
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void (*)(void *), void *));
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int (*halt_output)__P((void *));
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int (*halt_input)__P((void *));
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int (*speaker_ctl)__P((void *, int));
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#define SPKR_ON 1
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#define SPKR_OFF 0
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int (*getdev)__P((void *, struct audio_device *));
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int (*setfd)__P((void *, int));
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/* Mixer (in/out ports) */
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int (*set_port)__P((void *, mixer_ctrl_t *));
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int (*get_port)__P((void *, mixer_ctrl_t *));
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int (*query_devinfo)__P((void *, mixer_devinfo_t *));
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/* Allocate/free memory for the ring buffer. Usually malloc/free. */
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void *(*allocm)__P((void *, unsigned long, int, int));
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void (*freem)__P((void *, void *, int));
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unsigned long (*round_buffersize)__P((void *, unsigned long));
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int (*mappage)__P((void *, void *, int, int));
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int (*get_props)__P((void *)); /* device properties */
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};
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struct midi_info {
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char *name; /* Name of MIDI hardware */
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int props;
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};
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#define MIDI_PROP_OUT_INTR 1
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#define MIDI_PROP_CAN_INPUT 2
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struct midi_hw_if {
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int (*open)__P((void *, int, /* open hardware */
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void (*)__P((void *, int)), /* input callback */
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void (*)__P((void *)), /* output callback */
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void *));
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void (*close)__P((void *)); /* close hardware */
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int (*output)__P((void *, int)); /* output a byte */
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void (*getinfo)__P((void *, struct midi_info *));
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int (*ioctl)__P((u_long, caddr_t, int, struct proc *));
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};
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struct audio_attach_args {
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int type;
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void *hwif; /* either audio_hw_if * or midi_hw_if * */
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void *hdl;
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};
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#define AUDIODEV_TYPE_AUDIO 0
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#define AUDIODEV_TYPE_MIDI 1
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/* Attach the MI driver(s) to the MD driver. */
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extern void audio_attach_mi __P((struct audio_hw_if *, struct midi_hw_if *, void *, struct device *));
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/* Device identity flags */
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#define SOUND_DEVICE 0
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#define AUDIO_DEVICE 0x80
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#define AUDIOCTL_DEVICE 0xc0
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#define MIXER_DEVICE 0x10
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#define AUDIOUNIT(x) (minor(x)&0x0f)
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#define AUDIODEV(x) (minor(x)&0xf0)
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#define ISDEVSOUND(x) (AUDIODEV((x)) == SOUND_DEVICE)
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#define ISDEVAUDIO(x) (AUDIODEV((x)) == AUDIO_DEVICE)
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#define ISDEVAUDIOCTL(x) (AUDIODEV((x)) == AUDIOCTL_DEVICE)
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#define ISDEVMIXER(x) (AUDIODEV((x)) == MIXER_DEVICE)
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#ifndef __i386__
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#define splaudio splbio /* XXX */
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#define IPL_AUDIO IPL_BIO /* XXX */
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#endif
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