tarina

amixer.c (53111B)

---

 /*
  *   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., 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 <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");
 	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 0;
 	val -= min;
 	tmp = rint((double)val/(double)range * 100);
 	return tmp;
 }
 
 /* Function to convert from percentage to volume. val = percentage */
 
 #define convert_prange1(val, min, max) \
 	ceil((val) * ((max) - (min)) * 0.01 + (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;
 
 	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 (%i, %i, %i)!\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);
 		}
 		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-%i-", type);
 		while (size > 0) {
 			printf("0x%08x,", tlv[idx++]);
 			size -= sizeof(unsigned int);
 		}
 		break;
 	}
 	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=%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 (!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("%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;
 			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);
 			assert(res > 0);
 		}
 	}
 	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 morehelp, 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},
 	};
 
 	morehelp = 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)
 					sprintf(card, "hw:%i", i);
 				else {
 					fprintf(stderr, "Invalid card number.\n");
 					morehelp++;
 				}
 			}
 			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 1;
 		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");
 				morehelp++;
 			}
 			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 needs an argument.\n");
 			morehelp++;
 		}
 	}
 	if (morehelp) {
 		help();
 		return 1;
 	}
 	smixer_options.device = card;
 
 	if (read_stdin)
 		return exec_stdin();
 
 	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, 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, 0) ? 1 : 0;
 	} else if (!strcmp(argv[optind], "cset")) {
 		return cset(argc - optind - 1, argc - optind > 1 ? argv + optind + 1 : NULL, 0, 0) ? 1 : 0;
 	} else if (!strcmp(argv[optind], "cget")) {
 		return cset(argc - optind - 1, argc - optind > 1 ? argv + optind + 1 : NULL, 1, 0) ? 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;
 }