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alsa-utils/alsactl/names.c

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/*
* Advanced Linux Sound Architecture Control Program - ALSA Device Names
* Copyright (c) 2005 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 "aconfig.h"
#include "version.h"
#include <getopt.h>
#include <stdarg.h>
#include <stdio.h>
#include <assert.h>
#include <errno.h>
#include <alsa/asoundlib.h>
#include "alsactl.h"
typedef int (probe_single)(int card, snd_ctl_t *ctl, snd_config_t *config);
static int globidx;
static void dummy_error_handler(const char *file, int line, const char *function, int err, const char *fmt, ...)
{
}
static int for_each_card(probe_single *fcn, snd_config_t *config)
{
int card = -1, first = 1, err;
snd_ctl_t *ctl;
char ctlname[16];
while (1) {
if (snd_card_next(&card) < 0)
break;
if (card < 0) {
if (first) {
error("No soundcards found...");
return -ENODEV;
}
break;
}
first = 0;
sprintf(ctlname, "hw:%i", card);
err = snd_ctl_open(&ctl, ctlname, 0);
if (err < 0)
return err;
err = (fcn)(card, ctl, config);
snd_ctl_close(ctl);
if (err < 0)
return err;
}
return 0;
}
static int add_entry(snd_config_t *cfg, const char *name,
const char *cprefix, const char *flag,
const char *comment)
{
int err;
snd_config_t *c, *d;
char id[16];
char xcomment[256];
char *flag0 = " (", *flag1 = ")";
if (cprefix == NULL)
cprefix = "";
if (flag == NULL) {
flag0 = "";
flag = "";
flag1 = "";
}
sprintf(xcomment, "%s - %s%s%s%s", cprefix, comment, flag0, flag, flag1);
sprintf(id, "alsactl%i", globidx++);
err = snd_config_make_compound(&c, id, 0);
if (err < 0)
return err;
err = snd_config_add(cfg, c);
if (err < 0)
return err;
err = snd_config_make_string(&d, "name");
if (err < 0)
return err;
err = snd_config_set_string(d, name);
if (err < 0)
return err;
err = snd_config_add(c, d);
if (err < 0)
return err;
err = snd_config_make_string(&d, "comment");
if (err < 0)
return err;
err = snd_config_set_string(d, xcomment);
if (err < 0)
return err;
err = snd_config_add(c, d);
if (err < 0)
return err;
return 0;
}
static int probe_ctl_card(int card, snd_ctl_t *ctl, snd_config_t *config)
{
int err;
snd_ctl_card_info_t * info;
char name[16];
const char *dname;
snd_ctl_card_info_alloca(&info);
err = snd_ctl_card_info(ctl, info);
if (err < 0) {
error("Unable to get info for card %i: %s\n", card, snd_strerror(err));
return err;
}
sprintf(name, "hw:%i", card);
dname = snd_ctl_card_info_get_longname(info);
err = add_entry(config, name, "Physical Device", NULL, dname);
if (err < 0)
return err;
return 0;
}
static int probe_ctl(snd_config_t *config)
{
int err;
snd_config_t *c;
err = snd_config_make_compound(&c, "ctl", 0);
if (err < 0)
return err;
err = snd_config_add(config, c);
if (err < 0)
return err;
err = for_each_card(probe_ctl_card, c);
if (err < 0)
return err;
return 0;
}
static int probe_pcm_virtual(int card, snd_ctl_t *ctl, snd_config_t *config,
const char *name, const char *comment)
{
snd_pcm_t *pcm1, *pcm2;
int err1, err2, playback, capture, err;
char name1[32], name2[32], *flag;
if (!debugflag)
snd_lib_error_set_handler(dummy_error_handler);
sprintf(name1, name, card);
sprintf(name2, "plug:%s", name1);
err1 = snd_pcm_open(&pcm1, name1, SND_PCM_STREAM_PLAYBACK, SND_PCM_NONBLOCK);
err2 = snd_pcm_open(&pcm2, name1, SND_PCM_STREAM_CAPTURE, SND_PCM_NONBLOCK);
snd_lib_error_set_handler(NULL);
if (err1 >= 0)
snd_pcm_close(pcm1);
if (err2 >= 0)
snd_pcm_close(pcm2);
playback = (err1 == 0 || err1 == -EBUSY);
capture = (err2 == 0 || err2 == -EBUSY);
if (playback && capture)
flag = "Duplex";
else if (playback)
flag = "Playback";
else if (capture)
flag = "Capture";
else
return 0;
err = add_entry(config, name1, "Abstract Device", flag, comment);
if (err >= 0)
err = add_entry(config, name2, "Abstract Device With Conversions", flag, comment);
return err;
}
static int probe_pcm_card(int card, snd_ctl_t *ctl, snd_config_t *config)
{
int dev = -1, err, err1, err2;
snd_pcm_info_t * info1, * info2;
snd_pcm_class_t class;
char name[16];
const char *dname;
char *flag;
int first = 1, idx;
static const char *vnames1[] = {
"default:%i", "Default Device",
"front:%i", "Front Speakers",
"rear:%i", "Rear Speakers",
NULL
};
static const char *vnames2[] = {
"surround40:%i", "Front and Rear Speakers",
"surround51:%i", "Front, Rear, Center and Woofer",
"surround71:%i", "Front, Rear, Side, Center and Woofer",
"spdif:%i", "S/PDIF (IEC958) Optical or Coaxial Wire",
"phoneline:%i", "Phone Line Interface",
"modem:%i", "Soft Modem",
NULL
};
snd_pcm_info_alloca(&info1);
snd_pcm_info_alloca(&info2);
while (1) {
err = snd_ctl_pcm_next_device(ctl, &dev);
if (err < 0)
return err;
if (dev < 0)
break;
memset(info1, 0, snd_pcm_info_sizeof());
snd_pcm_info_set_device(info1, dev);
snd_pcm_info_set_stream(info1, SND_PCM_STREAM_PLAYBACK);
err1 = snd_ctl_pcm_info(ctl, info1);
memset(info2, 0, snd_pcm_info_sizeof());
snd_pcm_info_set_device(info2, dev);
snd_pcm_info_set_stream(info2, SND_PCM_STREAM_CAPTURE);
err2 = snd_ctl_pcm_info(ctl, info2);
if (err1 < 0 && err2 < 0) {
error("Unable to get info for pcm device %i:%i: %s\n", card, dev, snd_strerror(err1));
continue;
}
dname = snd_pcm_info_get_name(info1);
class = snd_pcm_info_get_class(info1);
if (err1 == 0 && err2 == 0)
flag = "Duplex";
else if (err1 == 0)
flag = "Playback";
else {
flag = "Capture";
dname = snd_pcm_info_get_name(info2);
class = snd_pcm_info_get_class(info2);
}
if (class != SND_PCM_CLASS_GENERIC &&
class != SND_PCM_CLASS_MULTI &&
class != SND_PCM_CLASS_MODEM ) /* skip this */
continue;
if (first) {
for (idx = 0; vnames1[idx] != NULL; idx += 2)
probe_pcm_virtual(card, ctl, config, vnames1[idx], vnames1[idx+1]);
}
first = 0;
sprintf(name, "hw:%i,%i", card, dev);
err = add_entry(config, name, "Physical Device", flag, dname);
if (err < 0)
return err;
sprintf(name, "plughw:%i,%i", card, dev);
err = add_entry(config, name, "Physical Device With Conversions", flag, dname);
if (err < 0)
return err;
}
if (!first) {
for (idx = 0; vnames2[idx] != NULL; idx += 2)
probe_pcm_virtual(card, ctl, config, vnames2[idx], vnames2[idx+1]);
}
return 0;
}
static int probe_pcm(snd_config_t *config)
{
int err;
snd_config_t *c;
err = snd_config_make_compound(&c, "pcm", 0);
if (err < 0)
return err;
err = snd_config_add(config, c);
if (err < 0)
return err;
err = for_each_card(probe_pcm_card, c);
if (err < 0)
return err;
return 0;
}
static int probe_rawmidi_virtual(snd_config_t *config,
const char *name, const char *comment)
{
snd_rawmidi_t *rawmidi1, *rawmidi2;
int err1, err2, playback, capture, err;
char *flag;
if (!debugflag)
snd_lib_error_set_handler(dummy_error_handler);
err1 = snd_rawmidi_open(NULL, &rawmidi1, name, SND_RAWMIDI_NONBLOCK);
err2 = snd_rawmidi_open(&rawmidi2, NULL, name, SND_RAWMIDI_NONBLOCK);
snd_lib_error_set_handler(NULL);
if (err1 >= 0)
snd_rawmidi_close(rawmidi1);
if (err2 >= 0)
snd_rawmidi_close(rawmidi2);
playback = (err1 == 0 || err1 == -EBUSY);
capture = (err2 == 0 || err2 == -EBUSY);
if (playback && capture)
flag = "Duplex";
else if (playback)
flag = "Playback";
else if (capture)
flag = "Capture";
else
return 0;
err = add_entry(config, name, "Abstract Device", flag, comment);
return err;
}
static int probe_rawmidi_card(int card, snd_ctl_t *ctl, snd_config_t *config)
{
int dev = -1, err, err1, err2;
snd_rawmidi_info_t * info1, * info2;
char name[16];
const char *dname;
const char *subname;
char *flag;
int subdev;
snd_rawmidi_info_alloca(&info1);
snd_rawmidi_info_alloca(&info2);
while (1) {
err = snd_ctl_rawmidi_next_device(ctl, &dev);
if (err < 0)
return err;
if (dev < 0)
break;
memset(info1, 0, snd_rawmidi_info_sizeof());
snd_rawmidi_info_set_device(info1, dev);
snd_rawmidi_info_set_stream(info1, SND_RAWMIDI_STREAM_OUTPUT);
err1 = snd_ctl_rawmidi_info(ctl, info1);
memset(info2, 0, snd_rawmidi_info_sizeof());
snd_rawmidi_info_set_device(info2, dev);
snd_rawmidi_info_set_stream(info2, SND_RAWMIDI_STREAM_INPUT);
err2 = snd_ctl_rawmidi_info(ctl, info2);
if (err1 < 0 && err2 < 0) {
error("Unable to get info for rawmidi device %i:%i: %s\n", card, dev, snd_strerror(err1));
continue;
}
dname = snd_rawmidi_info_get_name(info1);
subname = snd_rawmidi_info_get_subdevice_name(info1);
if (err1 == 0 && err2 == 0)
flag = "Duplex";
else if (err1 == 0)
flag = "Output";
else {
flag = "Input";
dname = snd_rawmidi_info_get_name(info2);
subname = snd_rawmidi_info_get_subdevice_name(info2);
}
if (subname[0] == '\0') {
sprintf(name, "hw:%i,%i", card, dev);
err = add_entry(config, name, "Physical Device", flag, dname);
if (err < 0)
return err;
} else {
subdev = 0;
do {
sprintf(name, "hw:%i,%i,%i", card, dev, subdev);
if (err1 == 0)
subname = snd_rawmidi_info_get_subdevice_name(info1);
else
subname = snd_rawmidi_info_get_subdevice_name(info2);
if (err1 == 0 && err2 == 0)
flag = "Duplex";
else if (err1 == 0)
flag = "Output";
else
flag = "Input";
err = add_entry(config, name, "Physical Device", flag, subname);
if (err < 0)
return err;
++subdev;
snd_rawmidi_info_set_subdevice(info1, subdev);
snd_rawmidi_info_set_subdevice(info2, subdev);
err1 = snd_ctl_rawmidi_info(ctl, info1);
err2 = snd_ctl_rawmidi_info(ctl, info2);
} while (err1 == 0 || err2 == 0);
}
}
return 0;
}
static int probe_rawmidi(snd_config_t *config)
{
int err;
snd_config_t *c;
err = snd_config_make_compound(&c, "rawmidi", 0);
if (err < 0)
return err;
err = snd_config_add(config, c);
if (err < 0)
return err;
err = probe_rawmidi_virtual(c, "default", "Default Device");
if (err < 0)
return err;
err = for_each_card(probe_rawmidi_card, c);
if (err < 0)
return err;
err = add_entry(c, "virtual", "Virtual Device", "Duplex", "Sequencer");
if (err < 0)
return err;
err = add_entry(c, "virtual:MERGE=0", "Virtual Device", "Duplex", "Sequencer (No Merge)");
if (err < 0)
return err;
return 0;
}
static int probe_timers(snd_config_t *config)
{
int err;
snd_timer_query_t *handle;
snd_timer_id_t *id;
snd_timer_ginfo_t *info;
char name[64];
const char *dname;
err = snd_timer_query_open(&handle, "default", 0);
if (err < 0)
return err;
snd_timer_id_alloca(&id);
snd_timer_ginfo_alloca(&info);
snd_timer_id_set_class(id, SND_TIMER_CLASS_NONE);
while (1) {
err = snd_timer_query_next_device(handle, id);
if (err < 0)
goto _err;
if (snd_timer_id_get_class(id) < 0)
break;
if (snd_timer_id_get_class(id) == SND_TIMER_CLASS_PCM)
continue;
snd_timer_ginfo_set_tid(info, id);
err = snd_timer_query_info(handle, info);
if (err < 0)
continue;
sprintf(name, "hw:CLASS=%i,SCLASS=%i,CARD=%i,DEV=%i,SUBDEV=%i",
snd_timer_id_get_class(id),
snd_timer_id_get_sclass(id),
snd_timer_id_get_card(id),
snd_timer_id_get_device(id),
snd_timer_id_get_subdevice(id));
dname = snd_timer_ginfo_get_name(info);
err = add_entry(config, name, "Physical Device", NULL, dname);
if (err < 0)
goto _err;
}
err = 0;
_err:
snd_timer_query_close(handle);
return err;
}
static int probe_timer(snd_config_t *config)
{
int err;
snd_config_t *c;
err = snd_config_make_compound(&c, "timer", 0);
if (err < 0)
return err;
err = snd_config_add(config, c);
if (err < 0)
return err;
err = probe_timers(c);
if (err < 0)
return err;
return 0;
}
static int probe_seq(snd_config_t *config)
{
int err;
snd_config_t *c;
err = snd_config_make_compound(&c, "seq", 0);
if (err < 0)
return err;
err = snd_config_add(config, c);
if (err < 0)
return err;
err = add_entry(c, "default", "Default Device", "Duplex", "Sequencer");
if (err < 0)
return err;
err = add_entry(c, "hw", "Physical Device", "Duplex", "Sequencer");
if (err < 0)
return err;
return 0;
}
typedef int (probe_fcn)(snd_config_t *config);
static probe_fcn * probes[] = {
probe_ctl,
probe_pcm,
probe_rawmidi,
probe_timer,
probe_seq,
NULL
};
int generate_names(const char *cfgfile)
{
int err, idx;
snd_config_t *config;
snd_output_t *out;
int stdio, ok = 0;
err = snd_config_top(&config);
if (err < 0) {
error("snd_config_top error: %s", snd_strerror(err));
return err;
}
for (idx = 0; probes[idx]; idx++) {
globidx = 1;
err = (probes[idx])(config);
if (err < 0) {
/* ignore -ENOTTY indicating the non-existing component */
if (err != -ENOTTY)
error("probe %i failed: %s", idx, snd_strerror(err));
} else {
ok++;
}
}
if (ok > 0) {
stdio = !strcmp(cfgfile, "-");
if (stdio) {
err = snd_output_stdio_attach(&out, stdout, 0);
} else {
err = snd_output_stdio_open(&out, cfgfile, "w+");
}
if (err < 0) {
error("Cannot open %s for writing: %s", cfgfile, snd_strerror(err));
return -errno;
}
err = snd_config_save(config, out);
snd_output_close(out);
if (err < 0)
error("snd_config_save: %s", snd_strerror(err));
} else {
return -ENOENT;
}
return 0;
}
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