136 lines
4.9 KiB
C
136 lines
4.9 KiB
C
/* $NetBSD: audio_if.h,v 1.6 1995/12/24 02:30:58 mycroft 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_hw_if {
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int (*open)__P((dev_t, 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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/* Sample rate */
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int (*set_in_sr)__P((void *, u_long));
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u_long (*get_in_sr)__P((void *));
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int (*set_out_sr)__P((void *, u_long));
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u_long (*get_out_sr)__P((void *));
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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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int (*set_encoding)__P((void *, u_int));
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int (*get_encoding)__P((void *));
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/* Precision = bits/sample, usually 8 or 16 */
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/* XXX should we have separate in/out? */
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int (*set_precision)__P((void *, u_int));
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int (*get_precision)__P((void *));
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/* Channels - mono(1), stereo(2) */
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int (*set_channels)__P((void *, int));
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int (*get_channels)__P((void *));
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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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/* Ports (in/out ports) */
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int (*set_out_port)__P((void *, int));
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int (*get_out_port)__P((void *));
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int (*set_in_port)__P((void *, int));
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int (*get_in_port)__P((void *));
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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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/* Return silence value for encoding */
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u_int (*get_silence)__P((int));
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/* Software en/decode functions, set if SW coding required by HW */
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void (*sw_encode)__P((void *, int, u_char *, int));
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void (*sw_decode)__P((void *, int, u_char *, int));
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/* Start input/output routines. These usually control DMA. */
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int (*start_output)__P((void *, void *, int, void (*)(), void *));
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int (*start_input)__P((void *, void *, int, 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 (*cont_output)__P((void *));
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int (*cont_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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int full_duplex; /* non-null if HW is able to do full-duplex */
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int audio_unit;
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};
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/* Register / deregister hardware driver */
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extern int audio_hardware_attach __P((struct audio_hw_if *, void *));
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extern int audio_hardware_detach __P((struct audio_hw_if *));
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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 MIXER_DEVICE 0x10
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#define ISDEVAUDIO(x) ((minor(x)&0xf0) == AUDIO_DEVICE)
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#define ISDEVSOUND(x) ((minor(x)&0xf0) == SOUND_DEVICE)
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#define ISDEVMIXER(x) ((minor(x)&0xf0) == MIXER_DEVICE)
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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 splaudio splbio /* XXX */
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#define IPL_AUDIO IPL_BIO /* XXX */
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