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alsa-utils/amixer/amixer.c
Jaroslav Kysela 68473a41c6 amixer: print help and add doc for 'sevents' and 'events' commands 
Signed-off-by: Jaroslav Kysela <perex@perex.cz>
2021-10-04 10:40:14 +02:00

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/*
* ALSA command line mixer utility
* Copyright (c) 1999-2000 by Jaroslav Kysela <perex@perex.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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 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 <poll.h>
#include <stdint.h>
#include "amixer.h"
#include "../alsamixer/volume_mapping.h"
#define LEVEL_BASIC (1<<0)
#define LEVEL_INACTIVE (1<<1)
#define LEVEL_ID (1<<2)
static int quiet = 0;
static int debugflag = 0;
static int no_check = 0;
static int smixer_level = 0;
static int ignore_error = 0;
static struct snd_mixer_selem_regopt smixer_options;
static 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(" -a,--abstract L select abstraction level (none or basic)\n");
printf(" -s,--stdin Read and execute commands from stdin sequentially\n");
printf(" -R,--raw-volume Use the raw value (default)\n");
printf(" -M,--mapped-volume Use the mapped volume\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");
printf("\nAvailable advanced commands:\n");
printf(" sevents show the mixer events for simple controls\n");
printf(" events show the mixer events for simple controls\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 (smixer_level == 0 && (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, smixer_level > 0 ? &smixer_options : 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_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++ = snd_ctl_elem_info_is_tlv_readable(info) ? 'R' : '-';
*res++ = snd_ctl_elem_info_is_tlv_writable(info) ? 'W' : '-';
*res++ = snd_ctl_elem_info_is_tlv_commandable(info) ? 'C' : '-';
*res++ = '\0';
return result;
}
#define check_range(val, min, max) \
(no_check ? (val) : ((val < min) ? (min) : (val > max) ? (max) : (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(long val, long min, long max)
{
long range = max - min;
int tmp;
if (range == 0)
return min;
val -= min;
tmp = rint((double)val/(double)range * 100);
return tmp;
}
/* Function to convert from percentage to volume. perc = percentage */
static long convert_prange1(long perc, long min, long max)
{
long tmp;
tmp = rint((double)perc * (double)(max - min) * 0.01);
if (tmp == 0 && perc > 0)
tmp++;
return tmp + min;
}
struct volume_ops {
int (*get_range)(snd_mixer_elem_t *elem, long *min, long *max);
int (*get)(snd_mixer_elem_t *elem, snd_mixer_selem_channel_id_t c,
long *value);
int (*set)(snd_mixer_elem_t *elem, snd_mixer_selem_channel_id_t c,
long value, int dir);
};
enum { VOL_RAW, VOL_DB, VOL_MAP };
struct volume_ops_set {
int (*has_volume)(snd_mixer_elem_t *elem);
struct volume_ops v[3];
};
static int set_playback_dB(snd_mixer_elem_t *elem,
snd_mixer_selem_channel_id_t c, long value, int dir)
{
return snd_mixer_selem_set_playback_dB(elem, c, value, dir);
}
static int set_capture_dB(snd_mixer_elem_t *elem,
snd_mixer_selem_channel_id_t c, long value, int dir)
{
return snd_mixer_selem_set_capture_dB(elem, c, value, dir);
}
static int set_playback_raw_volume(snd_mixer_elem_t *elem,
snd_mixer_selem_channel_id_t c,
long value, int dir)
{
return snd_mixer_selem_set_playback_volume(elem, c, value);
}
static int set_capture_raw_volume(snd_mixer_elem_t *elem,
snd_mixer_selem_channel_id_t c,
long value, int dir)
{
return snd_mixer_selem_set_capture_volume(elem, c, value);
}
/* FIXME: normalize to int32 space to be compatible with other types */
#define MAP_VOL_RES (INT32_MAX / 100)
static int get_mapped_volume_range(snd_mixer_elem_t *elem,
long *pmin, long *pmax)
{
*pmin = 0;
*pmax = MAP_VOL_RES;
return 0;
}
static int get_playback_mapped_volume(snd_mixer_elem_t *elem,
snd_mixer_selem_channel_id_t c,
long *value)
{
*value = (rint)(get_normalized_playback_volume(elem, c) * MAP_VOL_RES);
return 0;
}
static int set_playback_mapped_volume(snd_mixer_elem_t *elem,
snd_mixer_selem_channel_id_t c,
long value, int dir)
{
return set_normalized_playback_volume(elem, c,
(double)value / MAP_VOL_RES, dir);
}
static int get_capture_mapped_volume(snd_mixer_elem_t *elem,
snd_mixer_selem_channel_id_t c,
long *value)
{
*value = (rint)(get_normalized_capture_volume(elem, c) * MAP_VOL_RES);
return 0;
}
static int set_capture_mapped_volume(snd_mixer_elem_t *elem,
snd_mixer_selem_channel_id_t c,
long value, int dir)
{
return set_normalized_capture_volume(elem, c,
(double)value / MAP_VOL_RES, dir);
}
static const struct volume_ops_set vol_ops[2] = {
{
.has_volume = snd_mixer_selem_has_playback_volume,
.v = {{ snd_mixer_selem_get_playback_volume_range,
snd_mixer_selem_get_playback_volume,
set_playback_raw_volume },
{ snd_mixer_selem_get_playback_dB_range,
snd_mixer_selem_get_playback_dB,
set_playback_dB },
{ get_mapped_volume_range,
get_playback_mapped_volume,
set_playback_mapped_volume },
},
},
{
.has_volume = snd_mixer_selem_has_capture_volume,
.v = {{ snd_mixer_selem_get_capture_volume_range,
snd_mixer_selem_get_capture_volume,
set_capture_raw_volume },
{ snd_mixer_selem_get_capture_dB_range,
snd_mixer_selem_get_capture_dB,
set_capture_dB },
{ get_mapped_volume_range,
get_capture_mapped_volume,
set_capture_mapped_volume },
},
},
};
static int std_vol_type = VOL_RAW;
static int set_volume_simple(snd_mixer_elem_t *elem,
snd_mixer_selem_channel_id_t chn,
char **ptr, int dir)
{
long val, orig, pmin, pmax;
char *p = *ptr, *s;
int invalid = 0, percent = 0, err = 0;
int vol_type;
double scale = 1.0;
int correct = 0;
if (! vol_ops[dir].has_volume(elem))
invalid = 1;
if (*p == ':')
p++;
if (*p == '\0' || (!isdigit(*p) && *p != '-'))
goto skip;
s = p;
val = strtol(s, &p, 10);
if (*p == '.') {
p++;
strtol(p, &p, 10);
}
if (*p == '%') {
vol_type = std_vol_type;
percent = 1;
p++;
} else if (toupper(p[0]) == 'D' && toupper(p[1]) == 'B') {
vol_type = VOL_DB;
p += 2;
scale = 100;
} else {
vol_type = VOL_RAW;
}
if (*p && !strchr(",:+-", *p))
invalid = 1;
val = (long)(strtod(s, NULL) * scale);
if (vol_ops[dir].v[vol_type].get_range(elem, &pmin, &pmax) < 0)
invalid = 1;
if (percent)
val = (long)convert_prange1(val, pmin, pmax);
if (*p == '+' || *p == '-') {
if (! invalid) {
if (vol_ops[dir].v[vol_type].get(elem, chn, &orig) < 0)
invalid = 1;
if (*p == '+') {
val = orig + val;
correct = 1;
} else {
val = orig - val;
correct = -1;
}
}
p++;
}
if (*p && !strchr(",:", *p))
invalid = 1;
if (! invalid) {
val = check_range(val, pmin, pmax);
err = vol_ops[dir].v[vol_type].set(elem, chn, val, correct);
}
skip:
if (*p == ',')
p++;
*ptr = p;
return err ? err : (invalid ? -ENOENT : 0);
}
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)
{
char *str;
str = snd_ctl_ascii_elem_id_get(id);
if (str)
printf("%s", str);
free(str);
}
static void print_spaces(unsigned int spaces)
{
while (spaces-- > 0)
putc(' ', stdout);
}
static void print_dB(long dB)
{
if (dB < 0) {
printf("-%li.%02lidB", -dB / 100, -dB % 100);
} else {
printf("%li.%02lidB", dB / 100, dB % 100);
}
}
static void decode_tlv(unsigned int spaces, unsigned int *tlv, unsigned int tlv_size)
{
unsigned int type = tlv[0];
unsigned int size;
unsigned int idx = 0;
const char *chmap_type = NULL;
int lf = 1;
if (tlv_size < 2 * sizeof(unsigned int)) {
printf("TLV size error!\n");
return;
}
print_spaces(spaces);
printf("| ");
type = tlv[idx++];
size = tlv[idx++];
tlv_size -= 2 * sizeof(unsigned int);
if (size > tlv_size) {
printf("TLV size error (%u, %u, %u)!\n", type, size, tlv_size);
return;
}
switch (type) {
case SND_CTL_TLVT_CONTAINER:
printf("container\n");
size += sizeof(unsigned int) -1;
size /= sizeof(unsigned int);
while (idx < size) {
if (tlv[idx+1] > (size - idx) * sizeof(unsigned int)) {
printf("TLV size error in compound!\n");
return;
}
decode_tlv(spaces + 2, tlv + idx, tlv[idx+1] + 8);
idx += 2 + (tlv[idx+1] + sizeof(unsigned int) - 1) / sizeof(unsigned int);
}
lf = 0;
break;
case SND_CTL_TLVT_DB_SCALE:
printf("dBscale-");
if (size != 2 * sizeof(unsigned int)) {
while (size > 0) {
printf("0x%08x,", tlv[idx++]);
size -= sizeof(unsigned int);
}
} else {
printf("min=");
print_dB((int)tlv[2]);
printf(",step=");
print_dB(tlv[3] & 0xffff);
printf(",mute=%i", (tlv[3] >> 16) & 1);
}
break;
#ifdef SND_CTL_TLVT_DB_LINEAR
case SND_CTL_TLVT_DB_LINEAR:
printf("dBlinear-");
if (size != 2 * sizeof(unsigned int)) {
while (size > 0) {
printf("0x%08x,", tlv[idx++]);
size -= sizeof(unsigned int);
}
} else {
printf("min=");
print_dB((int)tlv[2]);
printf(",max=");
print_dB((int)tlv[3]);
}
break;
#endif
#ifdef SND_CTL_TLVT_DB_RANGE
case SND_CTL_TLVT_DB_RANGE:
printf("dBrange-\n");
if ((size % (6 * sizeof(unsigned int))) != 0) {
while (size > 0) {
printf("0x%08x,", tlv[idx++]);
size -= sizeof(unsigned int);
}
break;
}
while (size > 0) {
print_spaces(spaces + 2);
printf("rangemin=%i,", tlv[idx++]);
printf(",rangemax=%i\n", tlv[idx++]);
decode_tlv(spaces + 4, tlv + idx, 4 * sizeof(unsigned int));
idx += 4;
size -= 6 * sizeof(unsigned int);
}
break;
#endif
#ifdef SND_CTL_TLVT_DB_MINMAX
case SND_CTL_TLVT_DB_MINMAX:
case SND_CTL_TLVT_DB_MINMAX_MUTE:
if (type == SND_CTL_TLVT_DB_MINMAX_MUTE)
printf("dBminmaxmute-");
else
printf("dBminmax-");
if (size != 2 * sizeof(unsigned int)) {
while (size > 0) {
printf("0x%08x,", tlv[idx++]);
size -= sizeof(unsigned int);
}
} else {
printf("min=");
print_dB((int)tlv[2]);
printf(",max=");
print_dB((int)tlv[3]);
}
break;
#endif
#ifdef SND_CTL_TLVT_CHMAP_FIXED
case SND_CTL_TLVT_CHMAP_FIXED:
chmap_type = "fixed";
/* Fall through */
case SND_CTL_TLVT_CHMAP_VAR:
if (!chmap_type)
chmap_type = "variable";
/* Fall through */
case SND_CTL_TLVT_CHMAP_PAIRED:
if (!chmap_type)
chmap_type = "paired";
printf("chmap-%s=", chmap_type);
while (size > 0) {
printf("%s", snd_pcm_chmap_name(tlv[idx++]));
size -= sizeof(unsigned int);
if (size > 0)
printf(",");
}
break;
#endif
default:
printf("unk-%u-", type);
while (size > 0) {
printf("0x%08x,", tlv[idx++]);
size -= sizeof(unsigned int);
}
break;
}
if (lf)
putc('\n', stdout);
}
static int show_control(const char *space, snd_hctl_elem_t *elem,
int level)
{
int err;
unsigned int item, idx, count, *tlv;
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_aes_iec958_t iec958;
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=%u", 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=%lli,max=%lli,step=%lli\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 (!snd_ctl_elem_info_is_readable(info))
goto __skip_read;
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("%lli", 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;
case SND_CTL_ELEM_TYPE_IEC958:
snd_ctl_elem_value_get_iec958(control, &iec958);
printf("[AES0=0x%02x AES1=0x%02x AES2=0x%02x AES3=0x%02x]",
iec958.status[0], iec958.status[1],
iec958.status[2], iec958.status[3]);
break;
default:
printf("?");
break;
}
}
printf("\n");
__skip_read:
if (!snd_ctl_elem_info_is_tlv_readable(info))
goto __skip_tlv;
/* skip ASoC ext bytes controls that may have huge binary TLV data */
if (type == SND_CTL_ELEM_TYPE_BYTES &&
!snd_ctl_elem_info_is_readable(info) &&
!snd_ctl_elem_info_is_writable(info)) {
printf("%s; ASoC TLV Byte control, skipping bytes dump\n", space);
goto __skip_tlv;
}
tlv = malloc(4096);
if ((err = snd_hctl_elem_tlv_read(elem, tlv, 4096)) < 0) {
error("Control %s element TLV read error: %s\n", card, snd_strerror(err));
free(tlv);
return err;
}
decode_tlv(strlen(space), tlv, 4096);
free(tlv);
}
__skip_tlv:
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 void show_selem_volume(snd_mixer_elem_t *elem,
snd_mixer_selem_channel_id_t chn, int dir,
long min, long max)
{
long raw, val;
vol_ops[dir].v[VOL_RAW].get(elem, chn, &raw);
if (std_vol_type == VOL_RAW)
val = convert_prange(raw, min, max);
else {
vol_ops[dir].v[std_vol_type].get(elem, chn, &val);
val = convert_prange(val, 0, MAP_VOL_RES);
}
printf(" %li [%li%%]", raw, val);
if (!vol_ops[dir].v[VOL_DB].get(elem, chn, &val)) {
printf(" [");
print_dB(val);
printf("]");
}
}
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;
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");
}
}
if (snd_mixer_selem_is_enum_playback(elem)) {
printf(" penum");
} else if (snd_mixer_selem_is_enum_capture(elem)) {
printf(" cenum");
} else if (snd_mixer_selem_is_enumerated(elem)) {
printf(" enum");
}
printf("\n");
if (snd_mixer_selem_is_enumerated(elem)) {
int i, items;
unsigned int idx;
/*
* See snd_ctl_elem_init_enum_names() in
* sound/core/control.c.
*/
char itemname[64];
items = snd_mixer_selem_get_enum_items(elem);
printf(" Items:");
for (i = 0; i < items; i++) {
snd_mixer_selem_get_enum_item_name(elem, i, sizeof(itemname) - 1, itemname);
printf(" '%s'", itemname);
}
printf("\n");
for (i = 0; !snd_mixer_selem_get_enum_item(elem, i, &idx); i++) {
snd_mixer_selem_get_enum_item_name(elem, idx, sizeof(itemname) - 1, itemname);
printf(" Item%d: '%s'\n", i, itemname);
}
return 0; /* no more thing to do */
}
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)) {
show_selem_volume(elem, SND_MIXER_SCHN_MONO, 0, 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;
show_selem_volume(elem, SND_MIXER_SCHN_MONO, 0, 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;
show_selem_volume(elem, SND_MIXER_SCHN_MONO, 1, 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)) {
show_selem_volume(elem, chn, 0, 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;
show_selem_volume(elem, chn, 0, 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;
show_selem_volume(elem, chn, 1, 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 (smixer_level == 0 && (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, smixer_level > 0 ? &smixer_options : 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_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 keep_handle)
{
int err;
static snd_ctl_t *handle = NULL;
snd_ctl_elem_info_t *info;
snd_ctl_elem_id_t *id;
snd_ctl_elem_value_t *control;
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 (snd_ctl_ascii_elem_id_parse(id, argv[0])) {
fprintf(stderr, "Wrong control identifier: %s\n", argv[0]);
return -EINVAL;
}
if (debugflag) {
printf("VERIFY ID: ");
show_control_id(id);
printf("\n");
}
if (handle == NULL &&
(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) {
if (ignore_error)
return 0;
error("Cannot find the given element from control %s\n", card);
if (! keep_handle) {
snd_ctl_close(handle);
handle = NULL;
}
return err;
}
snd_ctl_elem_info_get_id(info, id); /* FIXME: Remove it when hctl find works ok !!! */
if (!roflag) {
snd_ctl_elem_value_set_id(control, id);
if ((err = snd_ctl_elem_read(handle, control)) < 0) {
if (ignore_error)
return 0;
error("Cannot read the given element from control %s\n", card);
if (! keep_handle) {
snd_ctl_close(handle);
handle = NULL;
}
return err;
}
err = snd_ctl_ascii_value_parse(handle, control, info, argv[1]);
if (err < 0) {
if (!ignore_error)
error("Control %s parse error: %s\n", card, snd_strerror(err));
if (!keep_handle) {
snd_ctl_close(handle);
handle = NULL;
}
return ignore_error ? 0 : err;
}
if ((err = snd_ctl_elem_write(handle, control)) < 0) {
if (!ignore_error)
error("Control %s element write error: %s\n", card, snd_strerror(err));
if (!keep_handle) {
snd_ctl_close(handle);
handle = NULL;
}
return ignore_error ? 0 : err;
}
}
if (! keep_handle) {
snd_ctl_close(handle);
handle = NULL;
}
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 const 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)
{
const 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 get_enum_item_index(snd_mixer_elem_t *elem, char **ptrp)
{
char *ptr = *ptrp;
int items, i, len;
/* See snd_ctl_elem_init_enum_names() in sound/core/control.c. */
char name[64];
items = snd_mixer_selem_get_enum_items(elem);
if (items <= 0)
return -1;
for (i = 0; i < items; i++) {
if (snd_mixer_selem_get_enum_item_name(elem, i, sizeof(name)-1, name) < 0)
continue;
len = strlen(name);
if (! strncmp(name, ptr, len)) {
if (! ptr[len] || ptr[len] == ',' || ptr[len] == '\n') {
ptr += len;
*ptrp = ptr;
return i;
}
}
}
return -1;
}
static int sset_enum(snd_mixer_elem_t *elem, unsigned int argc, char **argv)
{
unsigned int idx, item = 0;
int check_flag = ignore_error ? 0 : -1;
for (idx = 1; idx < argc; idx++) {
char *ptr = argv[idx];
while (*ptr) {
int ival = get_enum_item_index(elem, &ptr);
if (ival < 0)
return check_flag;
if (snd_mixer_selem_set_enum_item(elem, item++, ival) >= 0)
check_flag = 1;
/* skip separators */
while (*ptr == ',' || isspace(*ptr))
ptr++;
}
}
return check_flag;
}
static int sset_channels(snd_mixer_elem_t *elem, unsigned int argc, char **argv)
{
unsigned int channels = ~0U;
unsigned int dir = 3, okflag = 3;
unsigned int idx;
snd_mixer_selem_channel_id_t chn;
int check_flag = ignore_error ? 0 : -1;
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;
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);
if (snd_mixer_selem_set_playback_switch(elem, chn, get_bool_simple(&ptr, "mute", 1, ival)) >= 0)
check_flag = 1;
} else if (!strncmp(ptr, "off", 3) && snd_mixer_selem_has_playback_switch(elem)) {
snd_mixer_selem_get_playback_switch(elem, chn, &ival);
if (snd_mixer_selem_set_playback_switch(elem, chn, get_bool_simple(&ptr, "off", 1, ival)) >= 0)
check_flag = 1;
} else if (!strncmp(ptr, "unmute", 6) && snd_mixer_selem_has_playback_switch(elem)) {
snd_mixer_selem_get_playback_switch(elem, chn, &ival);
if (snd_mixer_selem_set_playback_switch(elem, chn, get_bool_simple(&ptr, "unmute", 0, ival)) >= 0)
check_flag = 1;
} else if (!strncmp(ptr, "on", 2) && snd_mixer_selem_has_playback_switch(elem)) {
snd_mixer_selem_get_playback_switch(elem, chn, &ival);
if (snd_mixer_selem_set_playback_switch(elem, chn, get_bool_simple(&ptr, "on", 0, ival)) >= 0)
check_flag = 1;
} 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);
if (snd_mixer_selem_set_playback_switch(elem, chn, (ival ? 1 : 0) ^ 1) >= 0)
check_flag = 1;
}
simple_skip_word(&ptr, "toggle");
} else if (isdigit(*ptr) || *ptr == '-' || *ptr == '+') {
if (set_volume_simple(elem, chn, &ptr, 0) >= 0)
check_flag = 1;
} else if (simple_skip_word(&ptr, "cap") || simple_skip_word(&ptr, "rec") ||
simple_skip_word(&ptr, "nocap") || simple_skip_word(&ptr, "norec")) {
/* nothing */
} else {
okflag &= ~1;
}
}
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);
if (snd_mixer_selem_set_capture_switch(elem, chn, get_bool_simple(&ptr, "cap", 0, ival)) >= 0)
check_flag = 1;
} else if (!strncmp(ptr, "rec", 3) && snd_mixer_selem_has_capture_switch(elem)) {
snd_mixer_selem_get_capture_switch(elem, chn, &ival);
if (snd_mixer_selem_set_capture_switch(elem, chn, get_bool_simple(&ptr, "rec", 0, ival)) >= 0)
check_flag = 1;
} else if (!strncmp(ptr, "nocap", 5) && snd_mixer_selem_has_capture_switch(elem)) {
snd_mixer_selem_get_capture_switch(elem, chn, &ival);
if (snd_mixer_selem_set_capture_switch(elem, chn, get_bool_simple(&ptr, "nocap", 1, ival)) >= 0)
check_flag = 1;
} else if (!strncmp(ptr, "norec", 5) && snd_mixer_selem_has_capture_switch(elem)) {
snd_mixer_selem_get_capture_switch(elem, chn, &ival);
if (snd_mixer_selem_set_capture_switch(elem, chn, get_bool_simple(&ptr, "norec", 1, ival)) >= 0)
check_flag = 1;
} 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);
if (snd_mixer_selem_set_capture_switch(elem, chn, (ival ? 1 : 0) ^ 1) >= 0)
check_flag = 1;
}
simple_skip_word(&ptr, "toggle");
} else if (isdigit(*ptr) || *ptr == '-' || *ptr == '+') {
if (set_volume_simple(elem, chn, &ptr, 1) >= 0)
check_flag = 1;
} else if (simple_skip_word(&ptr, "mute") || simple_skip_word(&ptr, "off") ||
simple_skip_word(&ptr, "unmute") || simple_skip_word(&ptr, "on")) {
/* nothing */
} else {
okflag &= ~2;
}
}
if (okflag == 0) {
if (debugflag) {
if (dir & 1)
error("Unknown playback setup '%s'..", ptr);
if (dir & 2)
error("Unknown capture setup '%s'..", ptr);
}
return 0; /* just skip it */
}
if (!multi)
ptr = optr;
firstchn = 0;
}
}
return check_flag;
}
static int sset(unsigned int argc, char *argv[], int roflag, int keep_handle)
{
int err = 0;
static snd_mixer_t *handle = NULL;
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 (handle == NULL) {
if ((err = snd_mixer_open(&handle, 0)) < 0) {
error("Mixer %s open error: %s\n", card, snd_strerror(err));
return err;
}
if (smixer_level == 0 && (err = snd_mixer_attach(handle, card)) < 0) {
error("Mixer attach %s error: %s", card, snd_strerror(err));
snd_mixer_close(handle);
handle = NULL;
return err;
}
if ((err = snd_mixer_selem_register(handle, smixer_level > 0 ? &smixer_options : NULL, NULL)) < 0) {
error("Mixer register error: %s", snd_strerror(err));
snd_mixer_close(handle);
handle = NULL;
return err;
}
err = snd_mixer_load(handle);
if (err < 0) {
error("Mixer %s load error: %s", card, snd_strerror(err));
snd_mixer_close(handle);
handle = NULL;
return err;
}
}
elem = snd_mixer_find_selem(handle, sid);
if (!elem) {
if (ignore_error)
return 0;
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);
handle = NULL;
return -ENOENT;
}
if (!roflag) {
/* enum control */
if (snd_mixer_selem_is_enumerated(elem))
err = sset_enum(elem, argc, argv);
else
err = sset_channels(elem, argc, argv);
if (!err)
goto done;
if (err < 0) {
error("Invalid command!");
goto done;
}
}
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);
}
done:
if (! keep_handle) {
snd_mixer_close(handle);
handle = NULL;
}
return err < 0 ? 1 : 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");
}
static 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);
}
static 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);
if (res < 0)
printf("ERR: %s (%d)\n", snd_strerror(res), res);
}
}
snd_hctl_close(handle);
return 0;
}
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));
}
static 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);
}
static 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 (smixer_level == 0 && (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, smixer_level > 0 ? &smixer_options : 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);
return 0;
}
/*
* split a line into tokens
* the content in the line buffer is modified
*/
static int split_line(char *buf, char **token, int max_token)
{
char *dst;
int n, esc, quote;
for (n = 0; n < max_token; n++) {
while (isspace(*buf))
buf++;
if (! *buf || *buf == '\n')
return n;
/* skip comments */
if (*buf == '#' || *buf == '!')
return n;
esc = 0;
quote = 0;
token[n] = buf;
for (dst = buf; *buf && *buf != '\n'; buf++) {
if (esc)
esc = 0;
else if (isspace(*buf) && !quote) {
buf++;
break;
} else if (*buf == '\\') {
esc = 1;
continue;
} else if (*buf == '\'' || *buf == '"') {
if (! quote) {
quote = *buf;
continue;
} else if (*buf == quote) {
quote = 0;
continue;
}
}
*dst++ = *buf;
}
*dst = 0;
}
return n;
}
#define MAX_ARGS 32
static int exec_stdin(void)
{
int narg;
char buf[256], *args[MAX_ARGS];
int err = 0;
/* quiet = 1; */
ignore_error = 1;
while (fgets(buf, sizeof(buf), stdin)) {
narg = split_line(buf, args, MAX_ARGS);
if (narg > 0) {
if (!strcmp(args[0], "sset") || !strcmp(args[0], "set"))
err = sset(narg - 1, args + 1, 0, 1);
else if (!strcmp(args[0], "cset"))
err = cset(narg - 1, args + 1, 0, 1);
if (err < 0)
return 1;
}
}
return 0;
}
int main(int argc, char *argv[])
{
int badopt, retval, level = 0;
int read_stdin = 0;
static const struct option long_option[] =
{
{"help", 0, NULL, 'h'},
{"card", 1, NULL, 'c'},
{"device", 1, NULL, 'D'},
{"quiet", 0, NULL, 'q'},
{"inactive", 0, NULL, 'i'},
{"debug", 0, NULL, 'd'},
{"nocheck", 0, NULL, 'n'},
{"version", 0, NULL, 'v'},
{"abstract", 1, NULL, 'a'},
{"stdin", 0, NULL, 's'},
{"raw-volume", 0, NULL, 'R'},
{"mapped-volume", 0, NULL, 'M'},
{NULL, 0, NULL, 0},
};
badopt = 0;
while (1) {
int c;
if ((c = getopt_long(argc, argv, "hc:D:qidnva:sRM", long_option, NULL)) < 0)
break;
switch (c) {
case 'h':
help();
return 0;
case 'c':
{
int i;
i = snd_card_get_index(optarg);
if (i >= 0 && i < 32)
#if defined(SND_LIB_VER) && SND_LIB_VER(1, 2, 5) <= SND_LIB_VERSION
sprintf(card, "sysdefault:%i", i);
#else
sprintf(card, "hw:%i", i);
#endif
else {
fprintf(stderr, "Invalid card number '%s'.\n", optarg);
badopt++;
}
}
break;
case 'D':
strncpy(card, optarg, sizeof(card)-1);
card[sizeof(card)-1] = '\0';
break;
case 'q':
quiet = 1;
break;
case 'i':
level |= LEVEL_INACTIVE;
break;
case 'd':
debugflag = 1;
break;
case 'n':
no_check = 1;
break;
case 'v':
printf("amixer version " SND_UTIL_VERSION_STR "\n");
return 0;
case 'a':
smixer_level = 1;
memset(&smixer_options, 0, sizeof(smixer_options));
smixer_options.ver = 1;
if (!strcmp(optarg, "none"))
smixer_options.abstract = SND_MIXER_SABSTRACT_NONE;
else if (!strcmp(optarg, "basic"))
smixer_options.abstract = SND_MIXER_SABSTRACT_BASIC;
else {
fprintf(stderr, "Select correct abstraction level (none or basic)...\n");
badopt++;
}
break;
case 's':
read_stdin = 1;
break;
case 'R':
std_vol_type = VOL_RAW;
break;
case 'M':
std_vol_type = VOL_MAP;
break;
default:
fprintf(stderr, "Invalid switch or option -%c needs an argument.\n", c);
badopt++;
}
}
if (badopt)
return 1;
smixer_options.device = card;
if (read_stdin) {
retval = exec_stdin();
goto finish;
}
if (argc - optind <= 0) {
retval = selems(LEVEL_BASIC | level) ? 1 : 0;
goto finish;
}
if (!strcmp(argv[optind], "help")) {
retval = help() ? 1 : 0;
} else if (!strcmp(argv[optind], "info")) {
retval = info() ? 1 : 0;
} else if (!strcmp(argv[optind], "controls")) {
retval = controls(level) ? 1 : 0;
} else if (!strcmp(argv[optind], "contents")) {
retval = controls(LEVEL_BASIC | level) ? 1 : 0;
} else if (!strcmp(argv[optind], "scontrols") || !strcmp(argv[optind], "simple")) {
retval = selems(level) ? 1 : 0;
} else if (!strcmp(argv[optind], "scontents")) {
retval = selems(LEVEL_BASIC | level) ? 1 : 0;
} else if (!strcmp(argv[optind], "sset") || !strcmp(argv[optind], "set")) {
retval = sset(argc - optind - 1, argc - optind > 1 ? argv + optind + 1 : NULL, 0, 0) ? 1 : 0;
} else if (!strcmp(argv[optind], "sget") || !strcmp(argv[optind], "get")) {
retval = sset(argc - optind - 1, argc - optind > 1 ? argv + optind + 1 : NULL, 1, 0) ? 1 : 0;
} else if (!strcmp(argv[optind], "cset")) {
retval = cset(argc - optind - 1, argc - optind > 1 ? argv + optind + 1 : NULL, 0, 0) ? 1 : 0;
} else if (!strcmp(argv[optind], "cget")) {
retval = cset(argc - optind - 1, argc - optind > 1 ? argv + optind + 1 : NULL, 1, 0) ? 1 : 0;
} else if (!strcmp(argv[optind], "events")) {
retval = events(argc - optind - 1, argc - optind > 1 ? argv + optind + 1 : NULL);
} else if (!strcmp(argv[optind], "sevents")) {
retval = sevents(argc - optind - 1, argc - optind > 1 ? argv + optind + 1 : NULL);
} else {
fprintf(stderr, "amixer: Unknown command '%s'...\n", argv[optind]);
retval = 0;
}
finish:
snd_config_update_free_global();
return retval;
}
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