448 lines
9.9 KiB
C
448 lines
9.9 KiB
C
/* $NetBSD: mixerctl.c,v 1.24 2009/07/14 21:02:24 apb 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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* This code is derived from software contributed to The NetBSD Foundation
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* by Lennart Augustsson (augustss@NetBSD.org) and 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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#include <sys/cdefs.h>
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#ifndef lint
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__RCSID("$NetBSD: mixerctl.c,v 1.24 2009/07/14 21:02:24 apb Exp $");
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#endif
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#include <stdio.h>
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#include <stdlib.h>
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#include <fcntl.h>
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#include <err.h>
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#include <unistd.h>
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#include <string.h>
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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 <paths.h>
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FILE *out = stdout;
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int vflag = 0;
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char *prog;
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struct field {
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char *name;
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mixer_ctrl_t *valp;
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mixer_devinfo_t *infp;
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char changed;
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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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static char *
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catstr(char *p, char *q)
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{
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char *r;
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asprintf(&r, "%s.%s", p, q);
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if (!r)
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err(1, "malloc");
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return r;
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}
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static 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; 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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static void
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prfield(struct field *p, const char *sep, int prvalset)
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{
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mixer_ctrl_t *m;
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int i, n;
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if (sep)
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fprintf(out, "%s%s", p->name, sep);
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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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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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fprintf(out, "%s",
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p->infp->un.e.member[i].label.name);
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if (prvalset) {
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fprintf(out, " [ ");
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for(i = 0; i < p->infp->un.e.num_mem; i++)
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fprintf(out, "%s ",
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p->infp->un.e.member[i].label.name);
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fprintf(out, "]");
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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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fprintf(out, "%s%s", n++ ? "," : "",
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p->infp->un.s.member[i].label.name);
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if (prvalset) {
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fprintf(out, " { ");
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for(i = 0; i < p->infp->un.s.num_mem; i++)
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fprintf(out, "%s ",
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p->infp->un.s.member[i].label.name);
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fprintf(out, "}");
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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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fprintf(out, "%d", m->un.value.level[0]);
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else
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fprintf(out, "%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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fprintf(out, " %s", p->infp->un.v.units.name);
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if (p->infp->un.v.delta)
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fprintf(out, " delta=%d", p->infp->un.v.delta);
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}
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break;
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default:
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printf("\n");
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errx(1, "Invalid format.");
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}
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}
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static int
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rdfield(struct field *p, char *q)
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{
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mixer_ctrl_t *m;
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int v, v0, v1, mask;
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int i;
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char *s;
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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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for(i = 0; i < p->infp->un.e.num_mem; i++)
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if (strcmp(p->infp->un.e.member[i].label.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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warnx("Bad enum value %s", q);
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return 0;
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}
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break;
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case AUDIO_MIXER_SET:
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mask = 0;
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for(v = 0; q && *q; q = s) {
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s = strchr(q, ',');
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if (s)
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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->un.s.member[i].label.name,
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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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warnx("Bad set value %s", q);
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return 0;
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}
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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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if (sscanf(q, "%d", &v) == 1) {
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m->un.value.level[0] = v;
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} else {
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warnx("Bad number %s", q);
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return 0;
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}
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} else {
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if (sscanf(q, "%d,%d", &v0, &v1) == 2) {
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m->un.value.level[0] = v0;
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m->un.value.level[1] = v1;
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} else if (sscanf(q, "%d", &v) == 1) {
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m->un.value.level[0] = m->un.value.level[1] = v;
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} else {
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warnx("Bad numbers %s", q);
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return 0;
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}
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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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p->changed = 1;
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return 1;
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}
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static int
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incfield(struct field *p, int inc)
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{
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mixer_ctrl_t *m;
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int i, v;
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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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m->un.ord += inc;
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if (m->un.ord < 0)
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m->un.ord = p->infp->un.e.num_mem-1;
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if (m->un.ord >= p->infp->un.e.num_mem)
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m->un.ord = 0;
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break;
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case AUDIO_MIXER_SET:
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m->un.mask += inc;
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if (m->un.mask < 0)
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m->un.mask = (1 << p->infp->un.s.num_mem) - 1;
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if (m->un.mask >= (1 << p->infp->un.s.num_mem))
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m->un.mask = 0;
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warnx("Can't ++/-- %s", p->name);
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return 0;
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case AUDIO_MIXER_VALUE:
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if (p->infp->un.v.delta)
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inc *= p->infp->un.v.delta;
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for (i = 0; i < m->un.value.num_channels; i++) {
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v = m->un.value.level[i];
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v += inc;
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if (v < AUDIO_MIN_GAIN)
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v = AUDIO_MIN_GAIN;
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if (v > AUDIO_MAX_GAIN)
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v = AUDIO_MAX_GAIN;
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m->un.value.level[i] = v;
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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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p->changed = 1;
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return 1;
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}
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static void
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wrarg(int fd, char *arg, const char *sep)
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{
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char *q;
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struct field *p;
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mixer_ctrl_t val;
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int incdec, r;
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q = strchr(arg, '=');
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if (q == NULL) {
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int l = strlen(arg);
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incdec = 0;
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if (l > 2 && arg[l-2] == '+' && arg[l-1] == '+')
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incdec = 1;
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else if (l > 2 && arg[l-2] == '-' && arg[l-1] == '-')
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incdec = -1;
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else {
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warnx("No `=' in %s", arg);
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return;
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}
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arg[l-2] = 0;
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} else if (q > arg && (*(q-1) == '+' || *(q-1) == '-')) {
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if (sscanf(q+1, "%d", &incdec) != 1) {
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warnx("Bad number %s", q+1);
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return;
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}
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if (*(q-1) == '-')
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incdec *= -1;
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*(q-1) = 0;
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q = NULL;
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} else
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*q++ = 0;
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p = findfield(arg);
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if (p == NULL) {
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warnx("field %s does not exist", arg);
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return;
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}
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val = *p->valp;
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if (q != NULL)
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r = rdfield(p, q);
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else
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r = incfield(p, incdec);
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if (r) {
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if (ioctl(fd, AUDIO_MIXER_WRITE, p->valp) < 0)
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warn("AUDIO_MIXER_WRITE");
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else if (sep) {
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*p->valp = val;
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prfield(p, ": ", 0);
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ioctl(fd, AUDIO_MIXER_READ, p->valp);
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printf(" -> ");
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prfield(p, 0, 0);
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printf("\n");
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}
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}
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}
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static void
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prarg(int fd, char *arg, const char *sep)
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{
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struct field *p;
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p = findfield(arg);
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if (p == NULL)
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warnx("field %s does not exist", arg);
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else
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prfield(p, sep, vflag), fprintf(out, "\n");
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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, wflag = 0;
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const char *file;
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const char *sep = "=";
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mixer_devinfo_t dinfo;
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int ndev;
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file = getenv("MIXERDEVICE");
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if (file == NULL)
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file = _PATH_MIXER;
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prog = *argv;
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while ((ch = getopt(argc, argv, "ad:f:nvw")) != -1) {
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switch(ch) {
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case 'a':
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aflag++;
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break;
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case 'w':
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wflag++;
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break;
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case 'v':
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vflag++;
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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': /* compatibility */
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case 'd':
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file = optarg;
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break;
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case '?':
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default:
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usage:
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fprintf(out, "%s [-d file] [-v] [-n] name ...\n", prog);
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fprintf(out, "%s [-d file] [-v] [-n] -w name=value ...\n",prog);
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fprintf(out, "%s [-d file] [-v] [-n] -a\n", prog);
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exit(0);
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}
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}
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argc -= optind;
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argv += optind;
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fd = open(file, O_RDWR);
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/* Try with mixer0. */
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if (fd < 0 && strcmp(file, _PATH_MIXER) == 0) {
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file = _PATH_MIXER0;
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fd = open(file, O_RDWR);
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}
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if (fd < 0)
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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) < 0)
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break;
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}
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rfields = calloc(ndev, sizeof *rfields);
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fields = calloc(ndev, sizeof *fields);
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infos = calloc(ndev, sizeof *infos);
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values = calloc(ndev, sizeof *values);
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for(i = 0; i < ndev; i++) {
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infos[i].index = i;
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ioctl(fd, AUDIO_MIXER_DEVINFO, &infos[i]);
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}
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for(i = 0; i < ndev; i++) {
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rfields[i].name = infos[i].label.name;
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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]) < 0) {
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values[i].un.value.num_channels = 1;
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if (ioctl(fd, AUDIO_MIXER_READ, &values[i]) < 0)
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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].type != -1) {
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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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fields[j].name = catstr(rfields[i].name,
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infos[pos].label.name);
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infos[pos].type = -1;
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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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fields[i].name = catstr(infos[cls].label.name,
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fields[i].name);
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}
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if (argc == 0 && aflag && !wflag) {
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for(i = 0; fields[i].name; i++) {
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prfield(&fields[i], sep, vflag);
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fprintf(out, "\n");
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}
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} else if (argc > 0 && !aflag) {
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while(argc--) {
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if (wflag)
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wrarg(fd, *argv, sep);
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else
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prarg(fd, *argv, sep);
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argv++;
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}
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} else
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goto usage;
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exit(0);
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}
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