audio_if.h revision 1.2
1 /* $NetBSD: audio_if.h,v 1.2 2019/05/08 13:40:17 isaki Exp $ */ 2 3 /* 4 * Copyright (c) 1994 Havard Eidnes. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by the Computer Systems 18 * Engineering Group at Lawrence Berkeley Laboratory. 19 * 4. Neither the name of the University nor of the Laboratory may be used 20 * to endorse or promote products derived from this software without 21 * specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 * 35 */ 36 37 #ifndef _SYS_DEV_AUDIO_AUDIO_IF_H_ 38 #define _SYS_DEV_AUDIO_AUDIO_IF_H_ 39 40 #include <sys/types.h> 41 #include <sys/audioio.h> 42 #include <sys/mutex.h> 43 44 /* check we have an audio(4) configured into kernel */ 45 #if defined(_KERNEL_OPT) 46 #include "audio.h" 47 48 #if (NAUDIO == 0) && (NMIDI == 0) && (NMIDIBUS == 0) 49 #error "No 'audio* at audiobus?' or 'midi* at midibus?' or similar configured" 50 #endif 51 52 #endif /* _KERNEL_OPT */ 53 54 /* 55 * Interfaces for hardware drivers and MI audio. 56 */ 57 58 struct audio_softc; 59 60 /** 61 * audio stream format 62 */ 63 typedef struct audio_params { 64 u_int sample_rate; /* sample rate */ 65 u_int encoding; /* e.g. mu-law, linear, etc */ 66 u_int precision; /* bits/subframe */ 67 u_int validbits; /* valid bits in a subframe */ 68 u_int channels; /* mono(1), stereo(2) */ 69 } audio_params_t; 70 71 #define AUFMT_INVALIDATE(fmt) (fmt)->mode |= 0x80000000 72 #define AUFMT_VALIDATE(fmt) (fmt)->mode &= 0x7fffffff 73 #define AUFMT_IS_VALID(fmt) (((fmt)->mode & 0x80000000) == 0) 74 75 #include <dev/audio/audiofil.h> 76 77 struct audio_hw_if { 78 int (*open)(void *, int); /* open hardware */ 79 void (*close)(void *); /* close hardware */ 80 81 int (*query_format)(void *, audio_format_query_t *); 82 int (*set_format)(void *, int, 83 const audio_params_t *, const audio_params_t *, 84 audio_filter_reg_t *, audio_filter_reg_t *); 85 86 /* Hardware may have some say in the blocksize to choose */ 87 int (*round_blocksize)(void *, int, int, const audio_params_t *); 88 89 /* 90 * Changing settings may require taking device out of "data mode", 91 * which can be quite expensive. Also, audiosetinfo() may 92 * change several settings in quick succession. To avoid 93 * having to take the device in/out of "data mode", we provide 94 * this function which indicates completion of settings 95 * adjustment. 96 */ 97 int (*commit_settings)(void *); 98 99 /* Start input/output routines. These usually control DMA. */ 100 int (*init_output)(void *, void *, int); 101 int (*init_input)(void *, void *, int); 102 int (*start_output)(void *, void *, int, 103 void (*)(void *), void *); 104 int (*start_input)(void *, void *, int, 105 void (*)(void *), void *); 106 int (*halt_output)(void *); 107 int (*halt_input)(void *); 108 109 int (*speaker_ctl)(void *, int); 110 #define SPKR_ON 1 111 #define SPKR_OFF 0 112 113 int (*getdev)(void *, struct audio_device *); 114 115 /* Mixer (in/out ports) */ 116 int (*set_port)(void *, mixer_ctrl_t *); 117 int (*get_port)(void *, mixer_ctrl_t *); 118 119 int (*query_devinfo)(void *, mixer_devinfo_t *); 120 121 /* Allocate/free memory for the ring buffer. Usually malloc/free. */ 122 void *(*allocm)(void *, int, size_t); 123 void (*freem)(void *, void *, size_t); 124 size_t (*round_buffersize)(void *, int, size_t); 125 126 int (*get_props)(void *); /* device properties */ 127 128 int (*trigger_output)(void *, void *, void *, int, 129 void (*)(void *), void *, const audio_params_t *); 130 int (*trigger_input)(void *, void *, void *, int, 131 void (*)(void *), void *, const audio_params_t *); 132 int (*dev_ioctl)(void *, u_long, void *, int, struct lwp *); 133 void (*get_locks)(void *, kmutex_t **, kmutex_t **); 134 }; 135 136 struct audio_attach_args { 137 int type; 138 const void *hwif; /* either audio_hw_if * or midi_hw_if * */ 139 void *hdl; 140 }; 141 #define AUDIODEV_TYPE_AUDIO 0 142 #define AUDIODEV_TYPE_MIDI 1 143 #define AUDIODEV_TYPE_OPL 2 144 #define AUDIODEV_TYPE_MPU 3 145 #define AUDIODEV_TYPE_AUX 4 146 147 /* Attach the MI driver(s) to the MD driver. */ 148 device_t audio_attach_mi(const struct audio_hw_if *, void *, device_t); 149 int audioprint(void *, const char *); 150 151 extern int audio_query_format(const struct audio_format *, int, 152 audio_format_query_t *); 153 extern int audio_indexof_format(const struct audio_format *, int, int, 154 const audio_params_t *); 155 extern const char *audio_encoding_name(int); 156 157 /* Device identity flags */ 158 #define SOUND_DEVICE 0 159 #define AUDIO_DEVICE 0x80 160 #define AUDIOCTL_DEVICE 0xc0 161 #define MIXER_DEVICE 0x10 162 163 #define AUDIOUNIT(x) (minor(x)&0x0f) 164 #define AUDIODEV(x) (minor(x)&0xf0) 165 166 #define ISDEVSOUND(x) (AUDIODEV((x)) == SOUND_DEVICE) 167 #define ISDEVAUDIO(x) (AUDIODEV((x)) == AUDIO_DEVICE) 168 #define ISDEVAUDIOCTL(x) (AUDIODEV((x)) == AUDIOCTL_DEVICE) 169 #define ISDEVMIXER(x) (AUDIODEV((x)) == MIXER_DEVICE) 170 171 /* 172 * USB Audio specification defines 12 channels: 173 * L R C LFE Ls Rs Lc Rc S Sl Sr T 174 */ 175 #define AUDIO_MAX_CHANNELS 12 176 177 #endif /* _SYS_DEV_AUDIO_AUDIO_IF_H_ */ 178 179
Indexes created Thu Oct 02 07:10:07 GMT 2025