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SUSE:SLE-12-SP5:GA
alsa-utils.948
0014-alsactl-Add-monitor-command.patch
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File 0014-alsactl-Add-monitor-command.patch of Package alsa-utils.948
From d2d9b6fc8d20fca1e06fc261ac20fd6cfd8a8d1b Mon Sep 17 00:00:00 2001 From: Takashi Iwai <tiwai@suse.de> Date: Tue, 26 Nov 2013 11:44:40 +0100 Subject: [PATCH] alsactl: Add monitor command With monitor command, you can monitor the events received from the given control device. Signed-off-by: Takashi Iwai <tiwai@suse.de> --- alsactl/Makefile.am | 2 +- alsactl/alsactl.1 | 8 +++++- alsactl/alsactl.c | 3 +++ alsactl/monitor.c | 75 +++++++++++++++++++++++++++++++++++++++++++++++++++++ 4 files changed, 86 insertions(+), 2 deletions(-) create mode 100644 alsactl/monitor.c diff --git a/alsactl/Makefile.am b/alsactl/Makefile.am index bac84eb079dc..b05b09ce287f 100644 --- a/alsactl/Makefile.am +++ b/alsactl/Makefile.am @@ -7,7 +7,7 @@ man_MANS += alsactl_init.7 endif EXTRA_DIST=alsactl.1 alsactl_init.xml -alsactl_SOURCES=alsactl.c state.c lock.c utils.c init_parse.c daemon.c +alsactl_SOURCES=alsactl.c state.c lock.c utils.c init_parse.c daemon.c monitor.c alsactl_CFLAGS=$(AM_CFLAGS) -D__USE_GNU -DSYS_ASOUNDRC=\"$(ASOUND_STATE_DIR)/asound.state\" -DSYS_PIDFILE=\"$(ALSACTL_PIDFILE_DIR)/alsactl.pid\" noinst_HEADERS=alsactl.h list.h init_sysdeps.c init_utils_string.c init_utils_run.c init_sysfs.c diff --git a/alsactl/alsactl.1 b/alsactl/alsactl.1 index 45ac8a68f4a8..a11c17cb59e1 100644 --- a/alsactl/alsactl.1 +++ b/alsactl/alsactl.1 @@ -6,6 +6,8 @@ alsactl \- advanced controls for ALSA soundcard driver \fBalsactl\fP [\fIoptions\fP] [\fIstore\fP|\fIrestore\fP|\fIinit\fP] <card # or id or device> +\fBalsactl\fP \fImonitor\fP <card # or id> + .SH DESCRIPTION \fBalsactl\fP is used to control advanced settings for the ALSA soundcard drivers. It supports multiple soundcards. If your card has @@ -34,8 +36,12 @@ is not known, error code 99 is returned. \fIkill\fP notifies the daemon to do the specified operation (quit, rescan, save_and_quit). +\fImonitor\fP is for monitoring the events received from the given +control device. + If no soundcards are specified, setup for all cards will be saved or -loaded. +loaded (except for \fImonitor\fP command that can handle only a single +card; it selects the card "default" when unspecified). .SH OPTIONS diff --git a/alsactl/alsactl.c b/alsactl/alsactl.c index 75baad856b5d..6bc013f467d0 100644 --- a/alsactl/alsactl.c +++ b/alsactl/alsactl.c @@ -100,6 +100,7 @@ static struct arg args[] = { { CARDCMD, "daemon", "store state periodically for one or each soundcards" }, { CARDCMD, "rdaemon", "like daemon but do the state restore at first" }, { KILLCMD, "kill", "notify daemon to quit, rescan or save_and_quit" }, +{ CARDCMD, "monitor", "monitor control events" }, { 0, NULL, NULL } }; @@ -363,6 +364,8 @@ int main(int argc, char *argv[]) res = state_daemon(cfgfile, cardname, period, pidfile); } else if (!strcmp(cmd, "kill")) { res = state_daemon_kill(pidfile, cardname); + } else if (!strcmp(cmd, "monitor")) { + res = monitor(cardname); } else { fprintf(stderr, "alsactl: Unknown command '%s'...\n", cmd); res = -ENODEV; diff --git a/alsactl/monitor.c b/alsactl/monitor.c new file mode 100644 index 000000000000..12d24504264b --- /dev/null +++ b/alsactl/monitor.c @@ -0,0 +1,75 @@ +/* + * Advanced Linux Sound Architecture Control Program + * Copyright (c) by Takashi Iwai <tiwai@suse.de> + * + * 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 "aconfig.h" +#include "version.h" +#include <stdio.h> +#include <alsa/asoundlib.h> + +int monitor(const char *name) +{ + snd_ctl_t *ctl; + snd_ctl_event_t *event; + int err; + + if (!name) + name = "default"; + + err = snd_ctl_open(&ctl, name, SND_CTL_READONLY); + if (err < 0) { + fprintf(stderr, "Cannot open ctl %s\n", name); + return err; + } + err = snd_ctl_subscribe_events(ctl, 1); + if (err < 0) { + fprintf(stderr, "Cannot open subscribe events to ctl %s\n", name); + snd_ctl_close(ctl); + return err; + } + snd_ctl_event_alloca(&event); + while (snd_ctl_read(ctl, event) > 0) { + unsigned int mask; + + if (snd_ctl_event_get_type(event) != SND_CTL_EVENT_ELEM) + continue; + + printf("#%d (%i,%i,%i,%s,%i)", + snd_ctl_event_elem_get_numid(event), + snd_ctl_event_elem_get_interface(event), + snd_ctl_event_elem_get_device(event), + snd_ctl_event_elem_get_subdevice(event), + snd_ctl_event_elem_get_name(event), + snd_ctl_event_elem_get_index(event)); + + mask = snd_ctl_event_elem_get_mask(event); + if (mask & SND_CTL_EVENT_MASK_VALUE) + printf(" VALUE"); + if (mask & SND_CTL_EVENT_MASK_INFO) + printf(" INFO"); + if (mask & SND_CTL_EVENT_MASK_ADD) + printf(" ADD"); + if (mask & SND_CTL_EVENT_MASK_TLV) + printf(" TLV"); + if (mask == SND_CTL_EVENT_MASK_REMOVE) + printf(" REMOVE"); + printf("\n"); + } + snd_ctl_close(ctl); + return 0; +} -- 1.8.4.3
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