1 /* $OpenBSD: audio_if.h,v 1.33 2016/09/19 06:46:44 ratchov Exp $ */ 2 /* $NetBSD: audio_if.h,v 1.24 1998/01/10 14:07:25 tv Exp $ */ 3 4 /* 5 * Copyright (c) 1994 Havard Eidnes. 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by the Computer Systems 19 * Engineering Group at Lawrence Berkeley Laboratory. 20 * 4. Neither the name of the University nor of the Laboratory may be used 21 * to endorse or promote products derived from this software without 22 * specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 * 36 */ 37 38 #ifndef _SYS_DEV_AUDIO_IF_H_ 39 #define _SYS_DEV_AUDIO_IF_H_ 40 41 #include <sys/mutex.h> 42 43 /* 44 * get_props 45 */ 46 #define AUDIO_PROP_FULLDUPLEX 0x01 47 #define AUDIO_PROP_MMAP 0x02 48 #define AUDIO_PROP_INDEPENDENT 0x04 49 50 #define AUDIO_BPS(bits) (bits) <= 8 ? 1 : ((bits) <= 16 ? 2 : 4) 51 52 /* 53 * Generic interface to hardware driver. 54 */ 55 56 struct mixer_devinfo; 57 struct mixer_ctrl; 58 59 struct audio_params { 60 u_long sample_rate; /* sample rate */ 61 #define AUDIO_ENCODING_NONE 0 /* no encoding assigned */ 62 #define AUDIO_ENCODING_ULAW 1 /* ITU G.711 mu-law */ 63 #define AUDIO_ENCODING_ALAW 2 /* ITU G.711 A-law */ 64 #define AUDIO_ENCODING_SLINEAR_LE 6 65 #define AUDIO_ENCODING_SLINEAR_BE 7 66 #define AUDIO_ENCODING_ULINEAR_LE 8 67 #define AUDIO_ENCODING_ULINEAR_BE 9 68 #define AUDIO_ENCODING_SLINEAR 10 69 #define AUDIO_ENCODING_ULINEAR 11 70 u_int encoding; /* mu-law, linear, etc */ 71 u_int precision; /* bits/sample */ 72 u_int bps; /* bytes/sample */ 73 u_int msb; /* data alignment */ 74 u_int channels; /* mono(1), stereo(2) */ 75 }; 76 77 struct audio_hw_if { 78 int (*open)(void *, int); /* open hardware */ 79 void (*close)(void *); /* close hardware */ 80 81 /* Set the audio encoding parameters (record and play). 82 * Return 0 on success, or an error code if the 83 * requested parameters are impossible. 84 * The values in the params struct may be changed (e.g. rounding 85 * to the nearest sample rate.) 86 */ 87 int (*set_params)(void *, int, int, struct audio_params *, 88 struct audio_params *); 89 90 /* Hardware may have some say in the blocksize to choose */ 91 int (*round_blocksize)(void *, int); 92 93 /* 94 * Changing settings may require taking device out of "data mode", 95 * which can be quite expensive. Also, audiosetinfo() may 96 * change several settings in quick succession. To avoid 97 * having to take the device in/out of "data mode", we provide 98 * this function which indicates completion of settings 99 * adjustment. 100 */ 101 int (*commit_settings)(void *); 102 103 /* Start input/output routines. These usually control DMA. */ 104 int (*init_output)(void *, void *, int); 105 int (*init_input)(void *, void *, int); 106 int (*start_output)(void *, void *, int, void (*)(void *), void *); 107 int (*start_input)(void *, void *, int, void (*)(void *), void *); 108 int (*halt_output)(void *); 109 int (*halt_input)(void *); 110 111 int (*speaker_ctl)(void *, int); 112 #define SPKR_ON 1 113 #define SPKR_OFF 0 114 115 int (*setfd)(void *, int); 116 117 /* Mixer (in/out ports) */ 118 int (*set_port)(void *, struct mixer_ctrl *); 119 int (*get_port)(void *, struct mixer_ctrl *); 120 121 int (*query_devinfo)(void *, struct mixer_devinfo *); 122 123 /* Allocate/free memory for the ring buffer. Usually malloc/free. */ 124 /* The _old interfaces have been deprecated and will not be 125 called in newer kernels if the new interfaces are present */ 126 void *(*allocm)(void *, int, size_t, int, int); 127 void (*freem)(void *, void *, int); 128 size_t (*round_buffersize)(void *, int, size_t); 129 130 int (*get_props)(void *); /* device properties */ 131 132 int (*trigger_output)(void *, void *, void *, int, 133 void (*)(void *), void *, struct audio_params *); 134 int (*trigger_input)(void *, void *, void *, int, 135 void (*)(void *), void *, struct audio_params *); 136 }; 137 138 struct audio_attach_args { 139 int type; 140 void *hwif; /* either audio_hw_if * or midi_hw_if * */ 141 void *hdl; 142 }; 143 #define AUDIODEV_TYPE_AUDIO 0 144 #define AUDIODEV_TYPE_MIDI 1 145 #define AUDIODEV_TYPE_OPL 2 146 #define AUDIODEV_TYPE_MPU 3 147 #define AUDIODEV_TYPE_RADIO 4 148 149 /* Attach the MI driver(s) to the MD driver. */ 150 struct device *audio_attach_mi(struct audio_hw_if *, void *, struct device *); 151 int audioprint(void *, const char *); 152 153 extern struct mutex audio_lock; 154 155 #endif /* _SYS_DEV_AUDIO_IF_H_ */ 156