409 lines
9.5 KiB
C
409 lines
9.5 KiB
C
/* $OpenBSD: mixerctl.c,v 1.34 2021/07/12 15:09:20 beck Exp $ */
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/* $NetBSD: mixerctl.c,v 1.11 1998/04/27 16:55:23 augustss Exp $ */
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/*
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* Copyright (c) 1997 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* Author: Lennart Augustsson, with some code and ideas from Chuck Cranor.
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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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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* mixerctl(1) - a program to control audio mixing.
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*/
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#include <sys/types.h>
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#include <sys/ioctl.h>
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#include <sys/audioio.h>
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#include <err.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <limits.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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struct field *findfield(char *);
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void adjlevel(char **, u_char *, int);
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void catstr(char *, char *, char *);
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void prfield(struct field *, char *, int, mixer_ctrl_t *);
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void rdfield(int, struct field *, char *, int, char *);
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__dead void usage(void);
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#define FIELD_NAME_MAX 64
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struct field {
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char name[FIELD_NAME_MAX];
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mixer_ctrl_t *valp;
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mixer_devinfo_t *infp;
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} *fields, *rfields;
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mixer_ctrl_t *values;
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mixer_devinfo_t *infos;
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void
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catstr(char *p, char *q, char *out)
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{
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char tmp[FIELD_NAME_MAX];
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snprintf(tmp, FIELD_NAME_MAX, "%s.%s", p, q);
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strlcpy(out, tmp, FIELD_NAME_MAX);
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}
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struct field *
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findfield(char *name)
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{
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int i;
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for (i = 0; fields[i].name[0] != '\0'; i++)
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if (strcmp(fields[i].name, name) == 0)
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return &fields[i];
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return (0);
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}
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#define e_member_name un.e.member[i].label.name
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#define s_member_name un.s.member[i].label.name
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void
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prfield(struct field *p, char *sep, int prvalset, mixer_ctrl_t *m)
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{
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int i, n;
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if (sep)
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printf("%s%s", p->name, sep);
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switch (m->type) {
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case AUDIO_MIXER_ENUM:
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for (i = 0; i < p->infp->un.e.num_mem; i++)
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if (p->infp->un.e.member[i].ord == m->un.ord)
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printf("%s",
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p->infp->e_member_name);
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if (prvalset) {
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printf(" [ ");
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for (i = 0; i < p->infp->un.e.num_mem; i++)
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printf("%s ", p->infp->e_member_name);
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printf("]");
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}
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break;
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case AUDIO_MIXER_SET:
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for (n = i = 0; i < p->infp->un.s.num_mem; i++)
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if (m->un.mask & p->infp->un.s.member[i].mask)
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printf("%s%s", n++ ? "," : "",
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p->infp->s_member_name);
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if (prvalset) {
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printf(" { ");
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for (i = 0; i < p->infp->un.s.num_mem; i++)
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printf("%s ", p->infp->s_member_name);
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printf("}");
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}
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break;
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case AUDIO_MIXER_VALUE:
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if (m->un.value.num_channels == 1)
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printf("%d", m->un.value.level[0]);
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else
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printf("%d,%d", m->un.value.level[0],
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m->un.value.level[1]);
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if (prvalset)
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printf(" %s", p->infp->un.v.units.name);
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break;
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default:
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errx(1, "Invalid format.");
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}
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}
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void
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adjlevel(char **p, u_char *olevel, int more)
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{
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char *ep, *cp = *p;
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long inc;
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u_char level;
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if (*cp != '+' && *cp != '-')
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*olevel = 0; /* absolute setting */
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errno = 0;
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inc = strtol(cp, &ep, 10);
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if (*cp == '\0' || (*ep != '\0' && *ep != ',') ||
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(errno == ERANGE && (inc == LONG_MAX || inc == LONG_MIN)))
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errx(1, "Bad number %s", cp);
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if (*ep == ',' && !more)
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errx(1, "Too many values");
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*p = ep;
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if (inc < AUDIO_MIN_GAIN - *olevel)
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level = AUDIO_MIN_GAIN;
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else if (inc > AUDIO_MAX_GAIN - *olevel)
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level = AUDIO_MAX_GAIN;
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else
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level = *olevel + inc;
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*olevel = level;
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}
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void
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rdfield(int fd, struct field *p, char *q, int quiet, char *sep)
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{
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mixer_ctrl_t *m, oldval;
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int i, mask;
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char *s;
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oldval = *p->valp;
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m = p->valp;
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switch (m->type) {
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case AUDIO_MIXER_ENUM:
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if (strcmp(q, "toggle") == 0) {
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for (i = 0; i < p->infp->un.e.num_mem; i++) {
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if (m->un.ord == p->infp->un.e.member[i].ord)
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break;
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}
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if (i < p->infp->un.e.num_mem)
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i++;
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else
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i = 0;
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m->un.ord = p->infp->un.e.member[i].ord;
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break;
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}
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for (i = 0; i < p->infp->un.e.num_mem; i++)
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if (strcmp(p->infp->e_member_name, q) == 0)
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break;
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if (i < p->infp->un.e.num_mem)
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m->un.ord = p->infp->un.e.member[i].ord;
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else
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errx(1, "Bad enum value %s", q);
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break;
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case AUDIO_MIXER_SET:
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mask = 0;
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for (; q && *q; q = s) {
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if ((s = strchr(q, ',')) != NULL)
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*s++ = 0;
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for (i = 0; i < p->infp->un.s.num_mem; i++)
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if (strcmp(p->infp->s_member_name, q) == 0)
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break;
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if (i < p->infp->un.s.num_mem)
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mask |= p->infp->un.s.member[i].mask;
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else
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errx(1, "Bad set value %s", q);
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}
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m->un.mask = mask;
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break;
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case AUDIO_MIXER_VALUE:
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if (m->un.value.num_channels == 1) {
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adjlevel(&q, &m->un.value.level[0], 0);
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} else {
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adjlevel(&q, &m->un.value.level[0], 1);
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if (*q++ == ',')
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adjlevel(&q, &m->un.value.level[1], 0);
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else
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m->un.value.level[1] = m->un.value.level[0];
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}
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break;
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default:
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errx(1, "Invalid format.");
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}
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if (ioctl(fd, AUDIO_MIXER_WRITE, p->valp) == -1) {
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warn("AUDIO_MIXER_WRITE");
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} else if (!quiet) {
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if (ioctl(fd, AUDIO_MIXER_READ, p->valp) == -1) {
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warn("AUDIO_MIXER_READ");
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} else {
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if (sep) {
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prfield(p, ": ", 0, &oldval);
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printf(" -> ");
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}
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prfield(p, NULL, 0, p->valp);
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printf("\n");
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}
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}
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}
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int
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main(int argc, char **argv)
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{
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int fd, i, j, ch, pos;
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int aflag = 0, qflag = 0, vflag = 0, tflag = 0;
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char *file;
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char *sep = "=";
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mixer_devinfo_t dinfo;
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int ndev;
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if ((file = getenv("MIXERDEVICE")) == 0 || *file == '\0')
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file = "/dev/audioctl0";
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while ((ch = getopt(argc, argv, "af:nqtvw")) != -1) {
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switch (ch) {
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case 'a':
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aflag = 1;
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break;
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case 'w':
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/* compat */
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break;
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case 'v':
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vflag = 1;
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break;
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case 'n':
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sep = 0;
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break;
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case 'f':
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file = optarg;
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break;
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case 'q':
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qflag = 1;
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break;
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case 't':
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tflag = 1;
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break;
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default:
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usage();
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}
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}
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argc -= optind;
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argv += optind;
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if (argc == 0 && tflag == 0)
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aflag = 1;
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if (unveil(file, "w") == -1)
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err(1, "unveil %s", file);
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if (unveil(NULL, NULL) == -1)
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err(1, "unveil");
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if ((fd = open(file, O_WRONLY)) == -1)
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err(1, "%s", file);
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for (ndev = 0; ; ndev++) {
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dinfo.index = ndev;
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if (ioctl(fd, AUDIO_MIXER_DEVINFO, &dinfo) == -1)
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break;
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}
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if (!ndev)
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errx(1, "no mixer devices configured");
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if ((rfields = calloc(ndev, sizeof *rfields)) == NULL ||
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(fields = calloc(ndev, sizeof *fields)) == NULL ||
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(infos = calloc(ndev, sizeof *infos)) == NULL ||
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(values = calloc(ndev, sizeof *values)) == NULL)
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err(1, "calloc()");
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for (i = 0; i < ndev; i++) {
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infos[i].index = i;
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if (ioctl(fd, AUDIO_MIXER_DEVINFO, &infos[i]) == -1) {
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ndev--;
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i--;
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continue;
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}
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}
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for (i = 0; i < ndev; i++) {
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strlcpy(rfields[i].name, infos[i].label.name, FIELD_NAME_MAX);
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rfields[i].valp = &values[i];
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rfields[i].infp = &infos[i];
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}
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for (i = 0; i < ndev; i++) {
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values[i].dev = i;
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values[i].type = infos[i].type;
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if (infos[i].type != AUDIO_MIXER_CLASS) {
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values[i].un.value.num_channels = 2;
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if (ioctl(fd, AUDIO_MIXER_READ, &values[i]) == -1) {
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values[i].un.value.num_channels = 1;
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if (ioctl(fd, AUDIO_MIXER_READ, &values[i]) == -1)
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err(1, "AUDIO_MIXER_READ");
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}
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}
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}
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for (j = i = 0; i < ndev; i++) {
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if (infos[i].type != AUDIO_MIXER_CLASS &&
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infos[i].prev == AUDIO_MIXER_LAST) {
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fields[j++] = rfields[i];
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for (pos = infos[i].next; pos != AUDIO_MIXER_LAST;
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pos = infos[pos].next) {
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fields[j] = rfields[pos];
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catstr(rfields[i].name, infos[pos].label.name,
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fields[j].name);
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j++;
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}
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}
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}
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for (i = 0; i < j; i++) {
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int cls = fields[i].infp->mixer_class;
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if (cls >= 0 && cls < ndev)
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catstr(infos[cls].label.name, fields[i].name,
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fields[i].name);
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}
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if (!argc && aflag) {
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for (i = 0; fields[i].name[0] != '\0'; i++) {
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prfield(&fields[i], sep, vflag, fields[i].valp);
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printf("\n");
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}
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} else if (argc > 0 && !aflag) {
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struct field *p;
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while (argc--) {
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char *q;
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ch = 0;
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if ((q = strchr(*argv, '=')) != NULL) {
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*q++ = '\0';
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ch = 1;
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}
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if ((p = findfield(*argv)) == NULL) {
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warnx("field %s does not exist", *argv);
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} else if (ch || tflag) {
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if (tflag && q == NULL)
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q = "toggle";
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rdfield(fd, p, q, qflag, sep);
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} else {
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prfield(p, sep, vflag, p->valp);
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printf("\n");
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}
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argv++;
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}
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} else
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usage();
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exit(0);
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}
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__dead void
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usage(void)
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{
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extern char *__progname; /* from crt0.o */
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fprintf(stderr,
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"usage: %s [-anv] [-f file]\n"
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" %s [-nv] [-f file] name ...\n"
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" %s [-qt] [-f file] name ...\n"
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" %s [-q] [-f file] name=value ...\n",
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__progname, __progname, __progname, __progname);
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exit(1);
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}
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