mixer.h (4235B)
1 /*- 2 * Copyright (c) 2021 Christos Margiolis <christos@FreeBSD.org> 3 * 4 * Permission is hereby granted, free of charge, to any person obtaining a copy 5 * of this software and associated documentation files (the "Software"), to deal 6 * in the Software without restriction, including without limitation the rights 7 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 8 * copies of the Software, and to permit persons to whom the Software is 9 * furnished to do so, subject to the following conditions: 10 * 11 * The above copyright notice and this permission notice shall be included in 12 * all copies or substantial portions of the Software. 13 * 14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 17 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 18 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 19 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN 20 * THE SOFTWARE. 21 * 22 * $FreeBSD$ 23 */ 24 25 #ifndef _MIXER_H_ 26 #define _MIXER_H_ 27 28 #include <sys/cdefs.h> 29 #include <sys/queue.h> 30 #include <sys/soundcard.h> 31 32 #include <limits.h> 33 34 #define MIX_ISSET(n,f) (((1U << (n)) & (f)) ? 1 : 0) 35 #define MIX_ISDEV(m,n) MIX_ISSET(n, (m)->devmask) 36 #define MIX_ISMUTE(m,n) MIX_ISSET(n, (m)->mutemask) 37 #define MIX_ISREC(m,n) MIX_ISSET(n, (m)->recmask) 38 #define MIX_ISRECSRC(m,n) MIX_ISSET(n, (m)->recsrc) 39 40 /* Forward declarations */ 41 struct mixer; 42 struct mix_dev; 43 44 typedef struct mix_ctl mix_ctl_t; 45 typedef struct mix_volume mix_volume_t; 46 47 /* User-defined controls */ 48 struct mix_ctl { 49 struct mix_dev *parent_dev; /* parent device */ 50 int id; /* control id */ 51 char name[NAME_MAX]; /* control name */ 52 int (*mod)(struct mix_dev *, void *); /* modify control values */ 53 int (*print)(struct mix_dev *, void *); /* print control */ 54 TAILQ_ENTRY(mix_ctl) ctls; 55 }; 56 57 struct mix_dev { 58 struct mixer *parent_mixer; /* parent mixer */ 59 char name[NAME_MAX]; /* device name (e.g "vol") */ 60 int devno; /* device number */ 61 struct mix_volume { 62 #define MIX_VOLMIN 0.0f 63 #define MIX_VOLMAX 1.0f 64 #define MIX_VOLNORM(v) ((v) / 100.0f) 65 #define MIX_VOLDENORM(v) ((int)((v) * 100.0f + 0.5f)) 66 float left; /* left volume */ 67 float right; /* right volume */ 68 } vol; 69 int nctl; /* number of controls */ 70 TAILQ_HEAD(, mix_ctl) ctls; /* control list */ 71 TAILQ_ENTRY(mix_dev) devs; 72 }; 73 74 struct mixer { 75 TAILQ_HEAD(, mix_dev) devs; /* device list */ 76 struct mix_dev *dev; /* selected device */ 77 oss_mixerinfo mi; /* mixer info */ 78 oss_card_info ci; /* audio card info */ 79 char name[NAME_MAX]; /* mixer name (e.g /dev/mixer0) */ 80 int fd; /* file descriptor */ 81 int unit; /* audio card unit */ 82 int ndev; /* number of devices */ 83 int devmask; /* supported devices */ 84 #define MIX_MUTE 0x01 85 #define MIX_UNMUTE 0x02 86 #define MIX_TOGGLEMUTE 0x04 87 int mutemask; /* muted devices */ 88 int recmask; /* recording devices */ 89 #define MIX_ADDRECSRC 0x01 90 #define MIX_REMOVERECSRC 0x02 91 #define MIX_SETRECSRC 0x04 92 #define MIX_TOGGLERECSRC 0x08 93 int recsrc; /* recording sources */ 94 #define MIX_MODE_MIXER 0x01 95 #define MIX_MODE_PLAY 0x02 96 #define MIX_MODE_REC 0x04 97 int mode; /* dev.pcm.X.mode sysctl */ 98 int f_default; /* default mixer flag */ 99 }; 100 101 __BEGIN_DECLS 102 103 struct mixer *mixer_open(const char *); 104 int mixer_close(struct mixer *); 105 struct mix_dev *mixer_get_dev(struct mixer *, int); 106 struct mix_dev *mixer_get_dev_byname(struct mixer *, const char *); 107 int mixer_add_ctl(struct mix_dev *, int, const char *, 108 int (*)(struct mix_dev *, void *), int (*)(struct mix_dev *, void *)); 109 int mixer_add_ctl_s(mix_ctl_t *); 110 int mixer_remove_ctl(mix_ctl_t *); 111 mix_ctl_t *mixer_get_ctl(struct mix_dev *, int); 112 mix_ctl_t *mixer_get_ctl_byname(struct mix_dev *, const char *); 113 int mixer_set_vol(struct mixer *, mix_volume_t); 114 int mixer_set_mute(struct mixer *, int); 115 int mixer_mod_recsrc(struct mixer *, int); 116 int mixer_get_dunit(void); 117 int mixer_set_dunit(struct mixer *, int); 118 int mixer_get_mode(int); 119 int mixer_get_nmixers(void); 120 121 __END_DECLS 122 123 #endif /* _MIXER_H_ */