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aconnect: Show sequencer sound card numer/PID via aconnect

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rawmidi devices expose the card number via IOCTLs, which allows to
find the corresponding device in sysfs.

The sequencer provides no identifing data. Chromium works around this
issue by scanning rawmidi as well as sequencer devices and matching
them by using assumtions, how the kernel register sequencer devices.

This patch adds support for displaying the sound card number/PID to
aconnect.

Signed-off-by: Martin Koegler <martin.koegler@chello.at>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Martin Koegler 2016-03-08 23:06:47 +01:00 committed by Takashi Iwai
parent 380c9fa444
commit ccc108fb83
2 changed files with 25 additions and 1 deletions
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9
configure.ac
View file

@ -41,6 +41,15 @@ AC_CHECK_HEADERS([alsa/topology.h], [have_topology="yes"], [have_topology="no"],
AC_CHECK_HEADERS([samplerate.h], [have_samplerate="yes"], [have_samplerate="no"],
[#include <samplerate.h>])
AC_CHECK_LIB([asound], [snd_seq_client_info_get_card], [HAVE_SEQ_CLIENT_INFO_GET_CARD="yes"])
if test "$HAVE_SEQ_CLIENT_INFO_GET_CARD" = "yes" ; then
AC_DEFINE([HAVE_SEQ_CLIENT_INFO_GET_CARD], 1, [alsa-lib supports snd_seq_client_info_get_card])
fi
AC_CHECK_LIB([asound], [snd_seq_client_info_get_pid], [HAVE_SEQ_CLIENT_INFO_GET_PID="yes"])
if test "$HAVE_SEQ_CLIENT_INFO_GET_PID" = "yes" ; then
AC_DEFINE([HAVE_SEQ_CLIENT_INFO_GET_PID], 1, [alsa-lib supports snd_seq_client_info_get_pid])
fi
AM_CONDITIONAL(HAVE_PCM, test "$have_pcm" = "yes")
AM_CONDITIONAL(HAVE_MIXER, test "$have_mixer" = "yes")
AM_CONDITIONAL(HAVE_RAWMIDI, test "$have_rawmidi" = "yes")

17
seq/aconnect/aconnect.c
View file

@ -166,11 +166,26 @@ static void print_port(snd_seq_t *seq, snd_seq_client_info_t *cinfo,
snd_seq_port_info_t *pinfo, int count)
{
if (! count) {
printf(_("client %d: '%s' [type=%s]\n"),
int card = -1, pid = -1;
printf(_("client %d: '%s' [type=%s"),
snd_seq_client_info_get_client(cinfo),
snd_seq_client_info_get_name(cinfo),
(snd_seq_client_info_get_type(cinfo) == SND_SEQ_USER_CLIENT ?
_("user") : _("kernel")));
#ifdef HAVE_SEQ_CLIENT_INFO_GET_CARD
card = snd_seq_client_info_get_card(cinfo);
#endif
if (card != -1)
printf(",card=%d", card);
#ifdef HAVE_SEQ_CLIENT_INFO_GET_PID
pid = snd_seq_client_info_get_pid(cinfo);
#endif
if (pid != -1)
printf(",pid=%d", pid);
printf("]\n");
}
printf(" %3d '%-16s'\n",
snd_seq_port_info_get_port(pinfo),