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alsa-utils/amixer/amixer.c
Giuliano Pochini 943bf551e1 amixer no-range-checking option 
This patch adds the --nocheck option that disables range checking. It helps
debugging drivers.

Signed-off-by: Giuliano Pochini <pochini@shiny.it>
2005-02-04 15:35:27 +00:00

1559 lines
44 KiB
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/*
* ALSA command line mixer utility
* Copyright (c) 1999-2000 by Jaroslav Kysela <perex@suse.cz>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <getopt.h>
#include <stdarg.h>
#include <ctype.h>
#include <math.h>
#include <errno.h>
#include <assert.h>
#include <alsa/asoundlib.h>
#include <sys/poll.h>
#include "amixer.h"
#define HELPID_HELP 1000
#define HELPID_CARD 1001
#define HELPID_DEVICE 1002
#define HELPID_QUIET 1003
#define HELPID_INACTIVE 1004
#define HELPID_DEBUG 1005
#define HELPID_VERSION 1006
#define HELPID_NOCHECK 1007
#define LEVEL_BASIC (1<<0)
#define LEVEL_INACTIVE (1<<1)
#define LEVEL_ID (1<<2)
int quiet = 0;
int debugflag = 0;
int no_check = 0;
char card[64] = "default";
static void error(const char *fmt,...)
{
va_list va;
va_start(va, fmt);
fprintf(stderr, "amixer: ");
vfprintf(stderr, fmt, va);
fprintf(stderr, "\n");
va_end(va);
}
static int help(void)
{
printf("Usage: amixer <options> command\n");
printf("\nAvailable options:\n");
printf(" -h,--help this help\n");
printf(" -c,--card N select the card\n");
printf(" -D,--device N select the device, default '%s'\n", card);
printf(" -d,--debug debug mode\n");
printf(" -n,--nocheck do not perform range checking\n");
printf(" -v,--version print version of this program\n");
printf(" -q,--quiet be quiet\n");
printf(" -i,--inactive show also inactive controls\n");
printf("\nAvailable commands:\n");
printf(" scontrols show all mixer simple controls\n");
printf(" scontents show contents of all mixer simple controls (default command)\n");
printf(" sset sID P set contents for one mixer simple control\n");
printf(" sget sID get contents for one mixer simple control\n");
printf(" controls show all controls for given card\n");
printf(" contents show contents of all controls for given card\n");
printf(" cset cID P set control contents for one control\n");
printf(" cget cID get control contents for one control\n");
return 0;
}
static int info(void)
{
int err;
snd_ctl_t *handle;
snd_mixer_t *mhandle;
snd_ctl_card_info_t *info;
snd_ctl_elem_list_t *clist;
snd_ctl_card_info_alloca(&info);
snd_ctl_elem_list_alloca(&clist);
if ((err = snd_ctl_open(&handle, card, 0)) < 0) {
error("Control device %s open error: %s", card, snd_strerror(err));
return err;
}
if ((err = snd_ctl_card_info(handle, info)) < 0) {
error("Control device %s hw info error: %s", card, snd_strerror(err));
return err;
}
printf("Card %s '%s'/'%s'\n", card, snd_ctl_card_info_get_id(info),
snd_ctl_card_info_get_longname(info));
printf(" Mixer name : '%s'\n", snd_ctl_card_info_get_mixername(info));
printf(" Components : '%s'\n", snd_ctl_card_info_get_components(info));
if ((err = snd_ctl_elem_list(handle, clist)) < 0) {
error("snd_ctl_elem_list failure: %s", snd_strerror(err));
} else {
printf(" Controls : %i\n", snd_ctl_elem_list_get_count(clist));
}
snd_ctl_close(handle);
if ((err = snd_mixer_open(&mhandle, 0)) < 0) {
error("Mixer open error: %s", snd_strerror(err));
return err;
}
if ((err = snd_mixer_attach(mhandle, card)) < 0) {
error("Mixer attach %s error: %s", card, snd_strerror(err));
snd_mixer_close(mhandle);
return err;
}
if ((err = snd_mixer_selem_register(mhandle, NULL, NULL)) < 0) {
error("Mixer register error: %s", snd_strerror(err));
snd_mixer_close(mhandle);
return err;
}
err = snd_mixer_load(mhandle);
if (err < 0) {
error("Mixer load %s error: %s", card, snd_strerror(err));
snd_mixer_close(mhandle);
return err;
}
printf(" Simple ctrls : %i\n", snd_mixer_get_count(mhandle));
snd_mixer_close(mhandle);
return 0;
}
static const char *control_iface(snd_ctl_elem_id_t *id)
{
return snd_ctl_elem_iface_name(snd_ctl_elem_id_get_interface(id));
}
static const char *control_type(snd_ctl_elem_info_t *info)
{
return snd_ctl_elem_type_name(snd_ctl_elem_info_get_type(info));
}
static const char *control_access(snd_ctl_elem_info_t *info)
{
static char result[10];
char *res = result;
*res++ = snd_ctl_elem_info_is_readable(info) ? 'r' : '-';
*res++ = snd_ctl_elem_info_is_writable(info) ? 'w' : '-';
*res++ = snd_ctl_elem_info_is_inactive(info) ? 'i' : '-';
*res++ = snd_ctl_elem_info_is_volatile(info) ? 'v' : '-';
*res++ = snd_ctl_elem_info_is_locked(info) ? 'l' : '-';
*res++ = '\0';
return result;
}
static int check_range(int val, int min, int max)
{
if (no_check)
return val;
if (val < min)
return min;
if (val > max)
return max;
return val;
}
#if 0
static int convert_range(int val, int omin, int omax, int nmin, int nmax)
{
int orange = omax - omin, nrange = nmax - nmin;
if (orange == 0)
return 0;
return rint((((double)nrange * ((double)val - (double)omin)) + ((double)orange / 2.0)) / ((double)orange + (double)nmin));
}
#endif
#if 0
static int convert_db_range(int val, int omin, int omax, int nmin, int nmax)
{
int orange = omax - omin, nrange = nmax - nmin;
if (orange == 0)
return 0;
return rint((((double)nrange * ((double)val - (double)omin)) + ((double)orange / 2.0)) / (double)orange + (double)nmin);
}
#endif
/* Fuction to convert from volume to percentage. val = volume */
static int convert_prange(int val, int min, int max)
{
int range = max - min;
int tmp;
if (range == 0)
return 0;
val -= min;
tmp = rint((double)val/(double)range * 100);
return tmp;
}
/* Function to convert from percentage to volume. val = percentage */
static int convert_prange1(int val, int min, int max)
{
int range = max - min;
int tmp;
if (range == 0)
return 0;
tmp = rint((double)range * ((double)val*.01)) + min;
return tmp;
}
static const char *get_percent(int val, int min, int max)
{
static char str[32];
int p;
p = convert_prange(val, min, max);
sprintf(str, "%i [%i%%]", val, p);
return str;
}
#if 0
static const char *get_percent1(int val, int min, int max, int min_dB, int max_dB)
{
static char str[32];
int p, db;
p = convert_prange(val, min, max);
db = convert_db_range(val, min, max, min_dB, max_dB);
sprintf(str, "%i [%i%%] [%i.%02idB]", val, p, db / 100, abs(db % 100));
return str;
}
#endif
static long get_integer(char **ptr, long min, long max)
{
int tmp, tmp1, tmp2;
if (**ptr == ':')
(*ptr)++;
if (**ptr == '\0' || (!isdigit(**ptr) && **ptr != '-'))
return min;
tmp = strtol(*ptr, ptr, 10);
tmp1 = tmp;
tmp2 = 0;
if (**ptr == '.') {
(*ptr)++;
tmp2 = strtol(*ptr, ptr, 10);
}
if (**ptr == '%') {
tmp1 = convert_prange1(tmp, min, max);
(*ptr)++;
}
tmp1 = check_range(tmp1, min, max);
if (**ptr == ',')
(*ptr)++;
return tmp1;
}
static long get_integer64(char **ptr, long long min, long long max)
{
long long tmp, tmp1, tmp2;
if (**ptr == ':')
(*ptr)++;
if (**ptr == '\0' || (!isdigit(**ptr) && **ptr != '-'))
return min;
tmp = strtol(*ptr, ptr, 10);
tmp1 = tmp;
tmp2 = 0;
if (**ptr == '.') {
(*ptr)++;
tmp2 = strtol(*ptr, ptr, 10);
}
if (**ptr == '%') {
tmp1 = convert_prange1(tmp, min, max);
(*ptr)++;
}
tmp1 = check_range(tmp1, min, max);
if (**ptr == ',')
(*ptr)++;
return tmp1;
}
static int get_volume_simple(char **ptr, int min, int max, int orig)
{
int tmp, tmp1, tmp2;
if (**ptr == ':')
(*ptr)++;
if (**ptr == '\0' || (!isdigit(**ptr) && **ptr != '-'))
return min;
tmp = atoi(*ptr);
if (**ptr == '-')
(*ptr)++;
while (isdigit(**ptr))
(*ptr)++;
tmp1 = tmp;
tmp2 = 0;
if (**ptr == '.') {
(*ptr)++;
tmp2 = atoi(*ptr);
while (isdigit(**ptr))
(*ptr)++;
}
if (**ptr == '%') {
tmp1 = convert_prange1(tmp, min, max);
(*ptr)++;
}
if (**ptr == '+') {
tmp1 = orig + tmp1;
(*ptr)++;
} else if (**ptr == '-') {
tmp1 = orig - tmp1;
(*ptr)++;
}
tmp1 = check_range(tmp1, min, max);
if (**ptr == ',')
(*ptr)++;
return tmp1;
}
static int get_bool_simple(char **ptr, char *str, int invert, int orig)
{
if (**ptr == ':')
(*ptr)++;
if (!strncasecmp(*ptr, str, strlen(str))) {
orig = 1 ^ (invert ? 1 : 0);
while (**ptr != '\0' && **ptr != ',' && **ptr != ':')
(*ptr)++;
}
if (**ptr == ',' || **ptr == ':')
(*ptr)++;
return orig;
}
static int simple_skip_word(char **ptr, char *str)
{
char *xptr = *ptr;
if (*xptr == ':')
xptr++;
if (!strncasecmp(xptr, str, strlen(str))) {
while (*xptr != '\0' && *xptr != ',' && *xptr != ':')
xptr++;
if (*xptr == ',' || *xptr == ':')
xptr++;
*ptr = xptr;
return 1;
}
return 0;
}
static void show_control_id(snd_ctl_elem_id_t *id)
{
unsigned int index, device, subdevice;
printf("numid=%u,iface=%s,name='%s'",
snd_ctl_elem_id_get_numid(id),
control_iface(id),
snd_ctl_elem_id_get_name(id));
index = snd_ctl_elem_id_get_index(id);
device = snd_ctl_elem_id_get_device(id);
subdevice = snd_ctl_elem_id_get_subdevice(id);
if (index)
printf(",index=%i", index);
if (device)
printf(",device=%i", device);
if (subdevice)
printf(",subdevice=%i", subdevice);
}
static int show_control(const char *space, snd_hctl_elem_t *elem,
int level)
{
int err;
unsigned int item, idx;
unsigned int count;
snd_ctl_elem_type_t type;
snd_ctl_elem_id_t *id;
snd_ctl_elem_info_t *info;
snd_ctl_elem_value_t *control;
snd_ctl_elem_id_alloca(&id);
snd_ctl_elem_info_alloca(&info);
snd_ctl_elem_value_alloca(&control);
if ((err = snd_hctl_elem_info(elem, info)) < 0) {
error("Control %s snd_hctl_elem_info error: %s\n", card, snd_strerror(err));
return err;
}
if (level & LEVEL_ID) {
snd_hctl_elem_get_id(elem, id);
show_control_id(id);
printf("\n");
}
count = snd_ctl_elem_info_get_count(info);
type = snd_ctl_elem_info_get_type(info);
printf("%s; type=%s,access=%s,values=%i", space, control_type(info), control_access(info), count);
switch (type) {
case SND_CTL_ELEM_TYPE_INTEGER:
printf(",min=%li,max=%li,step=%li\n",
snd_ctl_elem_info_get_min(info),
snd_ctl_elem_info_get_max(info),
snd_ctl_elem_info_get_step(info));
break;
case SND_CTL_ELEM_TYPE_INTEGER64:
printf(",min=%Li,max=%Li,step=%Li\n",
snd_ctl_elem_info_get_min64(info),
snd_ctl_elem_info_get_max64(info),
snd_ctl_elem_info_get_step64(info));
break;
case SND_CTL_ELEM_TYPE_ENUMERATED:
{
unsigned int items = snd_ctl_elem_info_get_items(info);
printf(",items=%u\n", items);
for (item = 0; item < items; item++) {
snd_ctl_elem_info_set_item(info, item);
if ((err = snd_hctl_elem_info(elem, info)) < 0) {
error("Control %s element info error: %s\n", card, snd_strerror(err));
return err;
}
printf("%s; Item #%u '%s'\n", space, item, snd_ctl_elem_info_get_item_name(info));
}
break;
}
default:
printf("\n");
break;
}
if (level & LEVEL_BASIC) {
if ((err = snd_hctl_elem_read(elem, control)) < 0) {
error("Control %s element read error: %s\n", card, snd_strerror(err));
return err;
}
printf("%s: values=", space);
for (idx = 0; idx < count; idx++) {
if (idx > 0)
printf(",");
switch (type) {
case SND_CTL_ELEM_TYPE_BOOLEAN:
printf("%s", snd_ctl_elem_value_get_boolean(control, idx) ? "on" : "off");
break;
case SND_CTL_ELEM_TYPE_INTEGER:
printf("%li", snd_ctl_elem_value_get_integer(control, idx));
break;
case SND_CTL_ELEM_TYPE_INTEGER64:
printf("%Li", snd_ctl_elem_value_get_integer64(control, idx));
break;
case SND_CTL_ELEM_TYPE_ENUMERATED:
printf("%u", snd_ctl_elem_value_get_enumerated(control, idx));
break;
case SND_CTL_ELEM_TYPE_BYTES:
printf("0x%02x", snd_ctl_elem_value_get_byte(control, idx));
break;
default:
printf("?");
break;
}
}
printf("\n");
}
return 0;
}
static int controls(int level)
{
int err;
snd_hctl_t *handle;
snd_hctl_elem_t *elem;
snd_ctl_elem_id_t *id;
snd_ctl_elem_info_t *info;
snd_ctl_elem_id_alloca(&id);
snd_ctl_elem_info_alloca(&info);
if ((err = snd_hctl_open(&handle, card, 0)) < 0) {
error("Control %s open error: %s", card, snd_strerror(err));
return err;
}
if ((err = snd_hctl_load(handle)) < 0) {
error("Control %s local error: %s\n", card, snd_strerror(err));
return err;
}
for (elem = snd_hctl_first_elem(handle); elem; elem = snd_hctl_elem_next(elem)) {
if ((err = snd_hctl_elem_info(elem, info)) < 0) {
error("Control %s snd_hctl_elem_info error: %s\n", card, snd_strerror(err));
return err;
}
if (!(level & LEVEL_INACTIVE) && snd_ctl_elem_info_is_inactive(info))
continue;
snd_hctl_elem_get_id(elem, id);
show_control_id(id);
printf("\n");
if (level & LEVEL_BASIC)
show_control(" ", elem, 1);
}
snd_hctl_close(handle);
return 0;
}
static int show_selem(snd_mixer_t *handle, snd_mixer_selem_id_t *id, const char *space, int level)
{
snd_mixer_selem_channel_id_t chn;
long pmin = 0, pmax = 0;
long cmin = 0, cmax = 0;
long pvol, cvol;
int psw, csw;
int pmono, cmono, mono_ok = 0;
snd_mixer_elem_t *elem;
elem = snd_mixer_find_selem(handle, id);
if (!elem) {
error("Mixer %s simple element not found", card);
return -ENOENT;
}
if (level & LEVEL_BASIC) {
printf("%sCapabilities:", space);
if (snd_mixer_selem_has_common_volume(elem)) {
printf(" volume");
if (snd_mixer_selem_has_playback_volume_joined(elem))
printf(" volume-joined");
} else {
if (snd_mixer_selem_has_playback_volume(elem)) {
printf(" pvolume");
if (snd_mixer_selem_has_playback_volume_joined(elem))
printf(" pvolume-joined");
}
if (snd_mixer_selem_has_capture_volume(elem)) {
printf(" cvolume");
if (snd_mixer_selem_has_capture_volume_joined(elem))
printf(" cvolume-joined");
}
}
if (snd_mixer_selem_has_common_switch(elem)) {
printf(" switch");
if (snd_mixer_selem_has_playback_switch_joined(elem))
printf(" switch-joined");
} else {
if (snd_mixer_selem_has_playback_switch(elem)) {
printf(" pswitch");
if (snd_mixer_selem_has_playback_switch_joined(elem))
printf(" pswitch-joined");
}
if (snd_mixer_selem_has_capture_switch(elem)) {
printf(" cswitch");
if (snd_mixer_selem_has_capture_switch_joined(elem))
printf(" cswitch-joined");
if (snd_mixer_selem_has_capture_switch_exclusive(elem))
printf(" cswitch-exclusive");
}
}
printf("\n");
if (snd_mixer_selem_has_capture_switch_exclusive(elem))
printf("%sCapture exclusive group: %i\n", space,
snd_mixer_selem_get_capture_group(elem));
if (snd_mixer_selem_has_playback_volume(elem) ||
snd_mixer_selem_has_playback_switch(elem)) {
printf("%sPlayback channels:", space);
if (snd_mixer_selem_is_playback_mono(elem)) {
printf(" Mono");
} else {
int first = 1;
for (chn = 0; chn <= SND_MIXER_SCHN_LAST; chn++){
if (!snd_mixer_selem_has_playback_channel(elem, chn))
continue;
if (!first)
printf(" -");
printf(" %s", snd_mixer_selem_channel_name(chn));
first = 0;
}
}
printf("\n");
}
if (snd_mixer_selem_has_capture_volume(elem) ||
snd_mixer_selem_has_capture_switch(elem)) {
printf("%sCapture channels:", space);
if (snd_mixer_selem_is_capture_mono(elem)) {
printf(" Mono");
} else {
int first = 1;
for (chn = 0; chn <= SND_MIXER_SCHN_LAST; chn++){
if (!snd_mixer_selem_has_capture_channel(elem, chn))
continue;
if (!first)
printf(" -");
printf(" %s", snd_mixer_selem_channel_name(chn));
first = 0;
}
}
printf("\n");
}
if (snd_mixer_selem_has_playback_volume(elem) ||
snd_mixer_selem_has_capture_volume(elem)) {
printf("%sLimits:", space);
if (snd_mixer_selem_has_common_volume(elem)) {
snd_mixer_selem_get_playback_volume_range(elem, &pmin, &pmax);
snd_mixer_selem_get_capture_volume_range(elem, &cmin, &cmax);
printf(" %li - %li", pmin, pmax);
} else {
if (snd_mixer_selem_has_playback_volume(elem)) {
snd_mixer_selem_get_playback_volume_range(elem, &pmin, &pmax);
printf(" Playback %li - %li", pmin, pmax);
}
if (snd_mixer_selem_has_capture_volume(elem)) {
snd_mixer_selem_get_capture_volume_range(elem, &cmin, &cmax);
printf(" Capture %li - %li", cmin, cmax);
}
}
printf("\n");
}
pmono = snd_mixer_selem_has_playback_channel(elem, SND_MIXER_SCHN_MONO) &&
(snd_mixer_selem_is_playback_mono(elem) ||
(!snd_mixer_selem_has_playback_volume(elem) &&
!snd_mixer_selem_has_playback_switch(elem)));
cmono = snd_mixer_selem_has_capture_channel(elem, SND_MIXER_SCHN_MONO) &&
(snd_mixer_selem_is_capture_mono(elem) ||
(!snd_mixer_selem_has_capture_volume(elem) &&
!snd_mixer_selem_has_capture_switch(elem)));
#if 0
printf("pmono = %i, cmono = %i (%i, %i, %i, %i)\n", pmono, cmono,
snd_mixer_selem_has_capture_channel(elem, SND_MIXER_SCHN_MONO),
snd_mixer_selem_is_capture_mono(elem),
snd_mixer_selem_has_capture_volume(elem),
snd_mixer_selem_has_capture_switch(elem));
#endif
if (pmono || cmono) {
if (!mono_ok) {
printf("%s%s:", space, "Mono");
mono_ok = 1;
}
if (snd_mixer_selem_has_common_volume(elem)) {
snd_mixer_selem_get_playback_volume(elem, SND_MIXER_SCHN_MONO, &pvol);
printf(" %s", get_percent(pvol, pmin, pmax));
}
if (snd_mixer_selem_has_common_switch(elem)) {
snd_mixer_selem_get_playback_switch(elem, SND_MIXER_SCHN_MONO, &psw);
printf(" [%s]", psw ? "on" : "off");
}
}
if (pmono && snd_mixer_selem_has_playback_channel(elem, SND_MIXER_SCHN_MONO)) {
int title = 0;
if (!mono_ok) {
printf("%s%s:", space, "Mono");
mono_ok = 1;
}
if (!snd_mixer_selem_has_common_volume(elem)) {
if (snd_mixer_selem_has_playback_volume(elem)) {
printf(" Playback");
title = 1;
snd_mixer_selem_get_playback_volume(elem, SND_MIXER_SCHN_MONO, &pvol);
printf(" %s", get_percent(pvol, pmin, pmax));
}
}
if (!snd_mixer_selem_has_common_switch(elem)) {
if (snd_mixer_selem_has_playback_switch(elem)) {
if (!title)
printf(" Playback");
snd_mixer_selem_get_playback_switch(elem, SND_MIXER_SCHN_MONO, &psw);
printf(" [%s]", psw ? "on" : "off");
}
}
}
if (cmono && snd_mixer_selem_has_capture_channel(elem, SND_MIXER_SCHN_MONO)) {
int title = 0;
if (!mono_ok) {
printf("%s%s:", space, "Mono");
mono_ok = 1;
}
if (!snd_mixer_selem_has_common_volume(elem)) {
if (snd_mixer_selem_has_capture_volume(elem)) {
printf(" Capture");
title = 1;
snd_mixer_selem_get_capture_volume(elem, SND_MIXER_SCHN_MONO, &cvol);
printf(" %s", get_percent(cvol, cmin, cmax));
}
}
if (!snd_mixer_selem_has_common_switch(elem)) {
if (snd_mixer_selem_has_capture_switch(elem)) {
if (!title)
printf(" Capture");
snd_mixer_selem_get_capture_switch(elem, SND_MIXER_SCHN_MONO, &csw);
printf(" [%s]", csw ? "on" : "off");
}
}
}
if (pmono || cmono)
printf("\n");
if (!pmono || !cmono) {
for (chn = 0; chn <= SND_MIXER_SCHN_LAST; chn++) {
if ((pmono || !snd_mixer_selem_has_playback_channel(elem, chn)) &&
(cmono || !snd_mixer_selem_has_capture_channel(elem, chn)))
continue;
printf("%s%s:", space, snd_mixer_selem_channel_name(chn));
if (!pmono && !cmono && snd_mixer_selem_has_common_volume(elem)) {
snd_mixer_selem_get_playback_volume(elem, chn, &pvol);
printf(" %s", get_percent(pvol, pmin, pmax));
}
if (!pmono && !cmono && snd_mixer_selem_has_common_switch(elem)) {
snd_mixer_selem_get_playback_switch(elem, chn, &psw);
printf(" [%s]", psw ? "on" : "off");
}
if (!pmono && snd_mixer_selem_has_playback_channel(elem, chn)) {
int title = 0;
if (!snd_mixer_selem_has_common_volume(elem)) {
if (snd_mixer_selem_has_playback_volume(elem)) {
printf(" Playback");
title = 1;
snd_mixer_selem_get_playback_volume(elem, chn, &pvol);
printf(" %s", get_percent(pvol, pmin, pmax));
}
}
if (!snd_mixer_selem_has_common_switch(elem)) {
if (snd_mixer_selem_has_playback_switch(elem)) {
if (!title)
printf(" Playback");
snd_mixer_selem_get_playback_switch(elem, chn, &psw);
printf(" [%s]", psw ? "on" : "off");
}
}
}
if (!cmono && snd_mixer_selem_has_capture_channel(elem, chn)) {
int title = 0;
if (!snd_mixer_selem_has_common_volume(elem)) {
if (snd_mixer_selem_has_capture_volume(elem)) {
printf(" Capture");
title = 1;
snd_mixer_selem_get_capture_volume(elem, chn, &cvol);
printf(" %s", get_percent(cvol, cmin, cmax));
}
}
if (!snd_mixer_selem_has_common_switch(elem)) {
if (snd_mixer_selem_has_capture_switch(elem)) {
if (!title)
printf(" Capture");
snd_mixer_selem_get_capture_switch(elem, chn, &csw);
printf(" [%s]", csw ? "on" : "off");
}
}
}
printf("\n");
}
}
}
return 0;
}
static int selems(int level)
{
int err;
snd_mixer_t *handle;
snd_mixer_selem_id_t *sid;
snd_mixer_elem_t *elem;
snd_mixer_selem_id_alloca(&sid);
if ((err = snd_mixer_open(&handle, 0)) < 0) {
error("Mixer %s open error: %s", card, snd_strerror(err));
return err;
}
if ((err = snd_mixer_attach(handle, card)) < 0) {
error("Mixer attach %s error: %s", card, snd_strerror(err));
snd_mixer_close(handle);
return err;
}
if ((err = snd_mixer_selem_register(handle, NULL, NULL)) < 0) {
error("Mixer register error: %s", snd_strerror(err));
snd_mixer_close(handle);
return err;
}
err = snd_mixer_load(handle);
if (err < 0) {
error("Mixer %s load error: %s", card, snd_strerror(err));
snd_mixer_close(handle);
return err;
}
for (elem = snd_mixer_first_elem(handle); elem; elem = snd_mixer_elem_next(elem)) {
snd_mixer_selem_get_id(elem, sid);
if (!(level & LEVEL_INACTIVE) && !snd_mixer_selem_is_active(elem))
continue;
printf("Simple mixer control '%s',%i\n", snd_mixer_selem_id_get_name(sid), snd_mixer_selem_id_get_index(sid));
show_selem(handle, sid, " ", level);
}
snd_mixer_close(handle);
return 0;
}
static int parse_control_id(const char *str, snd_ctl_elem_id_t *id)
{
int c, size;
char *ptr;
while (*str == ' ' || *str == '\t')
str++;
if (!(*str))
return -EINVAL;
snd_ctl_elem_id_set_interface(id, SND_CTL_ELEM_IFACE_MIXER); /* default */
while (*str) {
if (!strncasecmp(str, "numid=", 6)) {
str += 6;
snd_ctl_elem_id_set_numid(id, atoi(str));
while (isdigit(*str))
str++;
} else if (!strncasecmp(str, "iface=", 6)) {
str += 6;
if (!strncasecmp(str, "card", 4)) {
snd_ctl_elem_id_set_interface(id, SND_CTL_ELEM_IFACE_CARD);
str += 4;
} else if (!strncasecmp(str, "mixer", 5)) {
snd_ctl_elem_id_set_interface(id, SND_CTL_ELEM_IFACE_MIXER);
str += 5;
} else if (!strncasecmp(str, "pcm", 3)) {
snd_ctl_elem_id_set_interface(id, SND_CTL_ELEM_IFACE_PCM);
str += 3;
} else if (!strncasecmp(str, "rawmidi", 7)) {
snd_ctl_elem_id_set_interface(id, SND_CTL_ELEM_IFACE_RAWMIDI);
str += 7;
} else if (!strncasecmp(str, "timer", 5)) {
snd_ctl_elem_id_set_interface(id, SND_CTL_ELEM_IFACE_TIMER);
str += 5;
} else if (!strncasecmp(str, "sequencer", 9)) {
snd_ctl_elem_id_set_interface(id, SND_CTL_ELEM_IFACE_SEQUENCER);
str += 9;
} else {
return -EINVAL;
}
} else if (!strncasecmp(str, "name=", 5)) {
char buf[64];
str += 5;
ptr = buf;
size = 0;
if (*str == '\'' || *str == '\"') {
c = *str++;
while (*str && *str != c) {
if (size < (int)sizeof(buf)) {
*ptr++ = *str;
size++;
}
str++;
}
if (*str == c)
str++;
} else {
while (*str && *str != ',') {
if (size < (int)sizeof(buf)) {
*ptr++ = *str;
size++;
}
str++;
}
*ptr = '\0';
}
snd_ctl_elem_id_set_name(id, buf);
} else if (!strncasecmp(str, "index=", 6)) {
str += 6;
snd_ctl_elem_id_set_index(id, atoi(str));
while (isdigit(*str))
str++;
} else if (!strncasecmp(str, "device=", 7)) {
str += 7;
snd_ctl_elem_id_set_device(id, atoi(str));
while (isdigit(*str))
str++;
} else if (!strncasecmp(str, "subdevice=", 10)) {
str += 10;
snd_ctl_elem_id_set_subdevice(id, atoi(str));
while (isdigit(*str))
str++;
}
if (*str == ',') {
str++;
} else {
if (*str)
return -EINVAL;
}
}
return 0;
}
static int parse_simple_id(const char *str, snd_mixer_selem_id_t *sid)
{
int c, size;
char buf[128];
char *ptr = buf;
while (*str == ' ' || *str == '\t')
str++;
if (!(*str))
return -EINVAL;
size = 1; /* for '\0' */
if (*str != '"' && *str != '\'') {
while (*str && *str != ',') {
if (size < (int)sizeof(buf)) {
*ptr++ = *str;
size++;
}
str++;
}
} else {
c = *str++;
while (*str && *str != c) {
if (size < (int)sizeof(buf)) {
*ptr++ = *str;
size++;
}
str++;
}
if (*str == c)
str++;
}
if (*str == '\0') {
snd_mixer_selem_id_set_index(sid, 0);
*ptr = 0;
goto _set;
}
if (*str != ',')
return -EINVAL;
*ptr = 0; /* terminate the string */
str++;
if (!isdigit(*str))
return -EINVAL;
snd_mixer_selem_id_set_index(sid, atoi(str));
_set:
snd_mixer_selem_id_set_name(sid, buf);
return 0;
}
static int cset(int argc, char *argv[], int roflag)
{
int err;
snd_ctl_t *handle;
snd_ctl_elem_info_t *info;
snd_ctl_elem_id_t *id;
snd_ctl_elem_value_t *control;
char *ptr;
unsigned int idx, count;
long tmp;
snd_ctl_elem_type_t type;
snd_ctl_elem_info_alloca(&info);
snd_ctl_elem_id_alloca(&id);
snd_ctl_elem_value_alloca(&control);
if (argc < 1) {
fprintf(stderr, "Specify a full control identifier: [[iface=<iface>,][name='name',][index=<index>,][device=<device>,][subdevice=<subdevice>]]|[numid=<numid>]\n");
return -EINVAL;
}
if (parse_control_id(argv[0], id)) {
fprintf(stderr, "Wrong control identifier: %s\n", argv[0]);
return -EINVAL;
}
if (debugflag) {
printf("VERIFY ID: ");
show_control_id(id);
printf("\n");
}
if ((err = snd_ctl_open(&handle, card, 0)) < 0) {
error("Control %s open error: %s\n", card, snd_strerror(err));
return err;
}
snd_ctl_elem_info_set_id(info, id);
if ((err = snd_ctl_elem_info(handle, info)) < 0) {
error("Control %s cinfo error: %s\n", card, snd_strerror(err));
return err;
}
snd_ctl_elem_info_get_id(info, id); /* FIXME: Remove it when hctl find works ok !!! */
type = snd_ctl_elem_info_get_type(info);
count = snd_ctl_elem_info_get_count(info);
snd_ctl_elem_value_set_id(control, id);
if (!roflag) {
ptr = argv[1];
for (idx = 0; idx < count && idx < 128 && ptr && *ptr; idx++) {
switch (type) {
case SND_CTL_ELEM_TYPE_BOOLEAN:
tmp = 0;
if (!strncasecmp(ptr, "on", 2) || !strncasecmp(ptr, "up", 2)) {
tmp = 1;
ptr += 2;
} else if (!strncasecmp(ptr, "yes", 3)) {
tmp = 1;
ptr += 3;
} else if (!strncasecmp(ptr, "toggle", 6)) {
tmp = snd_ctl_elem_value_get_boolean(control, idx);
tmp = tmp > 0 ? 0 : 1;
ptr += 6;
} else if (isdigit(*ptr)) {
tmp = atoi(ptr) > 0 ? 1 : 0;
while (isdigit(*ptr))
ptr++;
} else {
while (*ptr && *ptr != ',')
ptr++;
}
snd_ctl_elem_value_set_boolean(control, idx, tmp);
break;
case SND_CTL_ELEM_TYPE_INTEGER:
tmp = get_integer(&ptr,
snd_ctl_elem_info_get_min(info),
snd_ctl_elem_info_get_max(info));
snd_ctl_elem_value_set_integer(control, idx, tmp);
break;
case SND_CTL_ELEM_TYPE_INTEGER64:
tmp = get_integer64(&ptr,
snd_ctl_elem_info_get_min64(info),
snd_ctl_elem_info_get_max64(info));
snd_ctl_elem_value_set_integer64(control, idx, tmp);
break;
case SND_CTL_ELEM_TYPE_ENUMERATED:
tmp = get_integer(&ptr, 0, snd_ctl_elem_info_get_items(info) - 1);
snd_ctl_elem_value_set_enumerated(control, idx, tmp);
break;
case SND_CTL_ELEM_TYPE_BYTES:
tmp = get_integer(&ptr, 0, 255);
snd_ctl_elem_value_set_byte(control, idx, tmp);
break;
default:
break;
}
if (!strchr(argv[1], ','))
ptr = argv[1];
else if (*ptr == ',')
ptr++;
}
if ((err = snd_ctl_elem_write(handle, control)) < 0) {
error("Control %s element write error: %s\n", card, snd_strerror(err));
return err;
}
}
snd_ctl_close(handle);
if (!quiet) {
snd_hctl_t *hctl;
snd_hctl_elem_t *elem;
if ((err = snd_hctl_open(&hctl, card, 0)) < 0) {
error("Control %s open error: %s\n", card, snd_strerror(err));
return err;
}
if ((err = snd_hctl_load(hctl)) < 0) {
error("Control %s load error: %s\n", card, snd_strerror(err));
return err;
}
elem = snd_hctl_find_elem(hctl, id);
if (elem)
show_control(" ", elem, LEVEL_BASIC | LEVEL_ID);
else
printf("Could not find the specified element\n");
snd_hctl_close(hctl);
}
return 0;
}
typedef struct channel_mask {
char *name;
unsigned int mask;
} channel_mask_t;
static channel_mask_t chanmask[] = {
{"frontleft", 1 << SND_MIXER_SCHN_FRONT_LEFT},
{"frontright", 1 << SND_MIXER_SCHN_FRONT_RIGHT},
{"frontcenter", 1 << SND_MIXER_SCHN_FRONT_CENTER},
{"front", ((1 << SND_MIXER_SCHN_FRONT_LEFT) |
(1 << SND_MIXER_SCHN_FRONT_RIGHT))},
{"center", 1 << SND_MIXER_SCHN_FRONT_CENTER},
{"rearleft", 1 << SND_MIXER_SCHN_REAR_LEFT},
{"rearright", 1 << SND_MIXER_SCHN_REAR_RIGHT},
{"rear", ((1 << SND_MIXER_SCHN_REAR_LEFT) |
(1 << SND_MIXER_SCHN_REAR_RIGHT))},
{"woofer", 1 << SND_MIXER_SCHN_WOOFER},
{NULL, 0}
};
static unsigned int channels_mask(char **arg, unsigned int def)
{
channel_mask_t *c;
for (c = chanmask; c->name; c++) {
if (strncasecmp(*arg, c->name, strlen(c->name)) == 0) {
while (**arg != '\0' && **arg != ',' && **arg != ' ' && **arg != '\t')
(*arg)++;
if (**arg == ',' || **arg == ' ' || **arg == '\t')
(*arg)++;
return c->mask;
}
}
return def;
}
static unsigned int dir_mask(char **arg, unsigned int def)
{
int findend = 0;
if (strncasecmp(*arg, "playback", 8) == 0)
def = findend = 1;
else if (strncasecmp(*arg, "capture", 8) == 0)
def = findend = 2;
if (findend) {
while (**arg != '\0' && **arg != ',' && **arg != ' ' && **arg != '\t')
(*arg)++;
if (**arg == ',' || **arg == ' ' || **arg == '\t')
(*arg)++;
}
return def;
}
static int sset(unsigned int argc, char *argv[], int roflag)
{
int err;
unsigned int idx;
snd_mixer_selem_channel_id_t chn;
unsigned int channels = ~0U;
unsigned int dir = 3;
long pmin, pmax, cmin, cmax;
snd_mixer_t *handle;
snd_mixer_elem_t *elem;
snd_mixer_selem_id_t *sid;
snd_mixer_selem_id_alloca(&sid);
if (argc < 1) {
fprintf(stderr, "Specify a scontrol identifier: 'name',index\n");
return 1;
}
if (parse_simple_id(argv[0], sid)) {
fprintf(stderr, "Wrong scontrol identifier: %s\n", argv[0]);
return 1;
}
if (!roflag && argc < 2) {
fprintf(stderr, "Specify what you want to set...\n");
return 1;
}
if ((err = snd_mixer_open(&handle, 0)) < 0) {
error("Mixer %s open error: %s\n", card, snd_strerror(err));
return err;
}
if ((err = snd_mixer_attach(handle, card)) < 0) {
error("Mixer attach %s error: %s", card, snd_strerror(err));
snd_mixer_close(handle);
return err;
}
if ((err = snd_mixer_selem_register(handle, NULL, NULL)) < 0) {
error("Mixer register error: %s", snd_strerror(err));
snd_mixer_close(handle);
return err;
}
err = snd_mixer_load(handle);
if (err < 0) {
error("Mixer %s load error: %s", card, snd_strerror(err));
snd_mixer_close(handle);
return err;
}
elem = snd_mixer_find_selem(handle, sid);
if (!elem) {
error("Unable to find simple control '%s',%i\n", snd_mixer_selem_id_get_name(sid), snd_mixer_selem_id_get_index(sid));
snd_mixer_close(handle);
return -ENOENT;
}
if (roflag)
goto __skip_write;
snd_mixer_selem_get_playback_volume_range(elem, &pmin, &pmax);
snd_mixer_selem_get_capture_volume_range(elem, &cmin, &cmax);
for (idx = 1; idx < argc; idx++) {
char *ptr = argv[idx], *optr;
int multi, firstchn = 1;
channels = channels_mask(&ptr, channels);
if (*ptr == '\0')
continue;
dir = dir_mask(&ptr, dir);
if (*ptr == '\0')
continue;
multi = (strchr(ptr, ',') != NULL);
optr = ptr;
for (chn = 0; chn <= SND_MIXER_SCHN_LAST; chn++) {
char *sptr = NULL;
int ival;
long lval;
if (!(channels & (1 << chn)))
continue;
if ((dir & 1) && snd_mixer_selem_has_playback_channel(elem, chn)) {
sptr = ptr;
if (!strncmp(ptr, "mute", 4) && snd_mixer_selem_has_playback_switch(elem)) {
snd_mixer_selem_get_playback_switch(elem, chn, &ival);
snd_mixer_selem_set_playback_switch(elem, chn, get_bool_simple(&ptr, "mute", 1, ival));
} else if (!strncmp(ptr, "off", 3) && snd_mixer_selem_has_playback_switch(elem)) {
snd_mixer_selem_get_playback_switch(elem, chn, &ival);
snd_mixer_selem_set_playback_switch(elem, chn, get_bool_simple(&ptr, "off", 1, ival));
} else if (!strncmp(ptr, "unmute", 6) && snd_mixer_selem_has_playback_switch(elem)) {
snd_mixer_selem_get_playback_switch(elem, chn, &ival);
snd_mixer_selem_set_playback_switch(elem, chn, get_bool_simple(&ptr, "unmute", 0, ival));
} else if (!strncmp(ptr, "on", 2) && snd_mixer_selem_has_playback_switch(elem)) {
snd_mixer_selem_get_playback_switch(elem, chn, &ival);
snd_mixer_selem_set_playback_switch(elem, chn, get_bool_simple(&ptr, "on", 0, ival));
} else if (!strncmp(ptr, "toggle", 6) && snd_mixer_selem_has_playback_switch(elem)) {
if (firstchn || !snd_mixer_selem_has_playback_switch_joined(elem)) {
snd_mixer_selem_get_playback_switch(elem, chn, &ival);
snd_mixer_selem_set_playback_switch(elem, chn, (ival ? 1 : 0) ^ 1);
}
simple_skip_word(&ptr, "toggle");
} else if (isdigit(*ptr) || *ptr == '-' || *ptr == '+') {
if (snd_mixer_selem_has_playback_volume(elem)) {
snd_mixer_selem_get_playback_volume(elem, chn, &lval);
snd_mixer_selem_set_playback_volume(elem, chn, get_volume_simple(&ptr, pmin, pmax, lval));
} else {
get_volume_simple(&ptr, 0, 100, 0);
}
} else if (simple_skip_word(&ptr, "cap") || simple_skip_word(&ptr, "rec") ||
simple_skip_word(&ptr, "nocap") || simple_skip_word(&ptr, "norec")) {
/* nothing */
} else {
error("Unknown playback setup '%s'..\n", ptr);
snd_mixer_close(handle);
return err;
}
}
if ((dir & 2) && snd_mixer_selem_has_capture_channel(elem, chn)) {
if (sptr != NULL)
ptr = sptr;
sptr = ptr;
if (!strncmp(ptr, "cap", 3) && snd_mixer_selem_has_capture_switch(elem)) {
snd_mixer_selem_get_capture_switch(elem, chn, &ival);
snd_mixer_selem_set_capture_switch(elem, chn, get_bool_simple(&ptr, "cap", 0, ival));
} else if (!strncmp(ptr, "rec", 3) && snd_mixer_selem_has_capture_switch(elem)) {
snd_mixer_selem_get_capture_switch(elem, chn, &ival);
snd_mixer_selem_set_capture_switch(elem, chn, get_bool_simple(&ptr, "rec", 0, ival));
} else if (!strncmp(ptr, "nocap", 5) && snd_mixer_selem_has_capture_switch(elem)) {
snd_mixer_selem_get_capture_switch(elem, chn, &ival);
snd_mixer_selem_set_capture_switch(elem, chn, get_bool_simple(&ptr, "nocap", 1, ival));
} else if (!strncmp(ptr, "norec", 5) && snd_mixer_selem_has_capture_switch(elem)) {
snd_mixer_selem_get_capture_switch(elem, chn, &ival);
snd_mixer_selem_set_capture_switch(elem, chn, get_bool_simple(&ptr, "norec", 1, ival));
} else if (!strncmp(ptr, "toggle", 6) && snd_mixer_selem_has_capture_switch(elem)) {
if (firstchn || !snd_mixer_selem_has_capture_switch_joined(elem)) {
snd_mixer_selem_get_capture_switch(elem, chn, &ival);
snd_mixer_selem_set_capture_switch(elem, chn, (ival ? 1 : 0) ^ 1);
}
simple_skip_word(&ptr, "toggle");
} else if (isdigit(*ptr) || *ptr == '-' || *ptr == '+') {
if (snd_mixer_selem_has_capture_volume(elem)) {
snd_mixer_selem_get_capture_volume(elem, chn, &lval);
snd_mixer_selem_set_capture_volume(elem, chn, get_volume_simple(&ptr, cmin, cmax, lval));
} else {
get_volume_simple(&ptr, 0, 100, 0);
}
} else if (simple_skip_word(&ptr, "mute") || simple_skip_word(&ptr, "off") ||
simple_skip_word(&ptr, "unmute") || simple_skip_word(&ptr, "on")) {
/* nothing */
} else {
error("Unknown capture setup '%s'..\n", ptr);
snd_mixer_close(handle);
return err;
}
}
if (!multi)
ptr = optr;
firstchn = 0;
}
}
__skip_write:
if (!quiet) {
printf("Simple mixer control '%s',%i\n", snd_mixer_selem_id_get_name(sid), snd_mixer_selem_id_get_index(sid));
show_selem(handle, sid, " ", 1);
}
snd_mixer_close(handle);
return 0;
}
static void events_info(snd_hctl_elem_t *helem)
{
snd_ctl_elem_id_t *id;
snd_ctl_elem_id_alloca(&id);
snd_hctl_elem_get_id(helem, id);
printf("event info: ");
show_control_id(id);
printf("\n");
}
static void events_value(snd_hctl_elem_t *helem)
{
snd_ctl_elem_id_t *id;
snd_ctl_elem_id_alloca(&id);
snd_hctl_elem_get_id(helem, id);
printf("event value: ");
show_control_id(id);
printf("\n");
}
static void events_remove(snd_hctl_elem_t *helem)
{
snd_ctl_elem_id_t *id;
snd_ctl_elem_id_alloca(&id);
snd_hctl_elem_get_id(helem, id);
printf("event remove: ");
show_control_id(id);
printf("\n");
}
int element_callback(snd_hctl_elem_t *elem, unsigned int mask)
{
if (mask == SND_CTL_EVENT_MASK_REMOVE) {
events_remove(elem);
return 0;
}
if (mask & SND_CTL_EVENT_MASK_INFO)
events_info(elem);
if (mask & SND_CTL_EVENT_MASK_VALUE)
events_value(elem);
return 0;
}
static void events_add(snd_hctl_elem_t *helem)
{
snd_ctl_elem_id_t *id;
snd_ctl_elem_id_alloca(&id);
snd_hctl_elem_get_id(helem, id);
printf("event add: ");
show_control_id(id);
printf("\n");
snd_hctl_elem_set_callback(helem, element_callback);
}
int ctl_callback(snd_hctl_t *ctl, unsigned int mask,
snd_hctl_elem_t *elem)
{
if (mask & SND_CTL_EVENT_MASK_ADD)
events_add(elem);
return 0;
}
static int events(int argc ATTRIBUTE_UNUSED, char *argv[] ATTRIBUTE_UNUSED)
{
snd_hctl_t *handle;
snd_hctl_elem_t *helem;
int err;
if ((err = snd_hctl_open(&handle, card, 0)) < 0) {
error("Control %s open error: %s\n", card, snd_strerror(err));
return err;
}
snd_hctl_set_callback(handle, ctl_callback);
if ((err = snd_hctl_load(handle)) < 0) {
error("Control %s hbuild error: %s\n", card, snd_strerror(err));
return err;
}
for (helem = snd_hctl_first_elem(handle); helem; helem = snd_hctl_elem_next(helem)) {
snd_hctl_elem_set_callback(helem, element_callback);
}
printf("Ready to listen...\n");
while (1) {
int res = snd_hctl_wait(handle, -1);
if (res >= 0) {
printf("Poll ok: %i\n", res);
res = snd_hctl_handle_events(handle);
assert(res > 0);
}
}
snd_hctl_close(handle);
}
static void sevents_value(snd_mixer_selem_id_t *sid)
{
printf("event value: '%s',%i\n", snd_mixer_selem_id_get_name(sid), snd_mixer_selem_id_get_index(sid));
}
static void sevents_info(snd_mixer_selem_id_t *sid)
{
printf("event info: '%s',%i\n", snd_mixer_selem_id_get_name(sid), snd_mixer_selem_id_get_index(sid));
}
static void sevents_remove(snd_mixer_selem_id_t *sid)
{
printf("event remove: '%s',%i\n", snd_mixer_selem_id_get_name(sid), snd_mixer_selem_id_get_index(sid));
}
int melem_event(snd_mixer_elem_t *elem, unsigned int mask)
{
snd_mixer_selem_id_t *sid;
snd_mixer_selem_id_alloca(&sid);
snd_mixer_selem_get_id(elem, sid);
if (mask == SND_CTL_EVENT_MASK_REMOVE) {
sevents_remove(sid);
return 0;
}
if (mask & SND_CTL_EVENT_MASK_INFO)
sevents_info(sid);
if (mask & SND_CTL_EVENT_MASK_VALUE)
sevents_value(sid);
return 0;
}
static void sevents_add(snd_mixer_elem_t *elem)
{
snd_mixer_selem_id_t *sid;
snd_mixer_selem_id_alloca(&sid);
snd_mixer_selem_get_id(elem, sid);
printf("event add: '%s',%i\n", snd_mixer_selem_id_get_name(sid), snd_mixer_selem_id_get_index(sid));
snd_mixer_elem_set_callback(elem, melem_event);
}
int mixer_event(snd_mixer_t *mixer, unsigned int mask,
snd_mixer_elem_t *elem)
{
if (mask & SND_CTL_EVENT_MASK_ADD)
sevents_add(elem);
return 0;
}
static int sevents(int argc ATTRIBUTE_UNUSED, char *argv[] ATTRIBUTE_UNUSED)
{
snd_mixer_t *handle;
int err;
if ((err = snd_mixer_open(&handle, 0)) < 0) {
error("Mixer %s open error: %s", card, snd_strerror(err));
return err;
}
if ((err = snd_mixer_attach(handle, card)) < 0) {
error("Mixer attach %s error: %s", card, snd_strerror(err));
snd_mixer_close(handle);
return err;
}
if ((err = snd_mixer_selem_register(handle, NULL, NULL)) < 0) {
error("Mixer register error: %s", snd_strerror(err));
snd_mixer_close(handle);
return err;
}
snd_mixer_set_callback(handle, mixer_event);
err = snd_mixer_load(handle);
if (err < 0) {
error("Mixer %s load error: %s", card, snd_strerror(err));
snd_mixer_close(handle);
return err;
}
printf("Ready to listen...\n");
while (1) {
int res;
res = snd_mixer_wait(handle, -1);
if (res >= 0) {
printf("Poll ok: %i\n", res);
res = snd_mixer_handle_events(handle);
assert(res >= 0);
}
}
snd_mixer_close(handle);
}
int main(int argc, char *argv[])
{
int morehelp, level = 0;
struct option long_option[] =
{
{"help", 0, NULL, HELPID_HELP},
{"card", 1, NULL, HELPID_CARD},
{"device", 1, NULL, HELPID_DEVICE},
{"quiet", 0, NULL, HELPID_QUIET},
{"inactive", 0, NULL, HELPID_INACTIVE},
{"debug", 0, NULL, HELPID_DEBUG},
{"nocheck", 0, NULL, HELPID_NOCHECK},
{"version", 0, NULL, HELPID_VERSION},
{NULL, 0, NULL, 0},
};
morehelp = 0;
while (1) {
int c;
if ((c = getopt_long(argc, argv, "hc:D:qidnv", long_option, NULL)) < 0)
break;
switch (c) {
case 'h':
case HELPID_HELP:
help();
return 0;
case 'c':
case HELPID_CARD:
{
int i;
i = snd_card_get_index(optarg);
if (i >= 0 && i < 32)
sprintf(card, "hw:%i", i);
else {
fprintf(stderr, "\07Invalid card number.\n");
morehelp++;
}
}
break;
case 'D':
case HELPID_DEVICE:
strncpy(card, optarg, sizeof(card)-1);
card[sizeof(card)-1] = '\0';
break;
case 'q':
case HELPID_QUIET:
quiet = 1;
break;
case 'i':
case HELPID_INACTIVE:
level |= LEVEL_INACTIVE;
break;
case 'd':
case HELPID_DEBUG:
debugflag = 1;
break;
case 'n':
case HELPID_NOCHECK:
no_check = 1;
break;
case 'v':
case HELPID_VERSION:
printf("amixer version " SND_UTIL_VERSION_STR "\n");
return 1;
default:
fprintf(stderr, "\07Invalid switch or option needs an argument.\n");
morehelp++;
}
}
if (morehelp) {
help();
return 1;
}
if (argc - optind <= 0) {
return selems(LEVEL_BASIC | level) ? 1 : 0;
}
if (!strcmp(argv[optind], "help")) {
return help() ? 1 : 0;
} else if (!strcmp(argv[optind], "info")) {
return info() ? 1 : 0;
} else if (!strcmp(argv[optind], "controls")) {
return controls(level) ? 1 : 0;
} else if (!strcmp(argv[optind], "contents")) {
return controls(LEVEL_BASIC | level) ? 1 : 0;
} else if (!strcmp(argv[optind], "scontrols") || !strcmp(argv[optind], "simple")) {
return selems(level) ? 1 : 0;
} else if (!strcmp(argv[optind], "scontents")) {
return selems(LEVEL_BASIC | level) ? 1 : 0;
} else if (!strcmp(argv[optind], "sset") || !strcmp(argv[optind], "set")) {
return sset(argc - optind - 1, argc - optind > 1 ? argv + optind + 1 : NULL, 0) ? 1 : 0;
} else if (!strcmp(argv[optind], "sget") || !strcmp(argv[optind], "get")) {
return sset(argc - optind - 1, argc - optind > 1 ? argv + optind + 1 : NULL, 1) ? 1 : 0;
} else if (!strcmp(argv[optind], "cset")) {
return cset(argc - optind - 1, argc - optind > 1 ? argv + optind + 1 : NULL, 0) ? 1 : 0;
} else if (!strcmp(argv[optind], "cget")) {
return cset(argc - optind - 1, argc - optind > 1 ? argv + optind + 1 : NULL, 1) ? 1 : 0;
} else if (!strcmp(argv[optind], "events")) {
return events(argc - optind - 1, argc - optind > 1 ? argv + optind + 1 : NULL);
} else if (!strcmp(argv[optind], "sevents")) {
return sevents(argc - optind - 1, argc - optind > 1 ? argv + optind + 1 : NULL);
} else {
fprintf(stderr, "amixer: Unknown command '%s'...\n", argv[optind]);
}
return 0;
}
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