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https://github.com/alsa-project/alsa-utils
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e88216ba64
Original aplay implementation has a feature to output two types of list;
devices and PCMs. The list of devices is a result to query sound card and
pcm component structured maintained in kernel land. The list of PCMs is a
result to parse runtime configuration files in alsa-lib. Entries in the
former list is corresponding to ALSA PCM character device
('/dev/snd/pcm%uC%uD[p|c]'), while entries in the latter list includes
some 'virtual' instances in application runtime.
This commit adds an implementation for the above functionality. This is
executed by taking 'list' sub-command. A 'device' option has the same
effect as '--list-devices' and '-L' of aplay. A 'pcm' option has the same
effect as '--list-pcms' and '-l' of aplay. In both cases, an additional
option is required for stream direction. Below is examples of new command
system for this sub-command.
$ axfer list device -C (= arecord --list-devices)
$ axfer list pcm -P (= aplay -l)
Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
16 lines
419 B
C
16 lines
419 B
C
// SPDX-License-Identifier: GPL-2.0
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//
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// subcmd.h - a header for each sub-commands.
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//
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// Copyright (c) 2018 Takashi Sakamoto <o-takashi@sakamocchi.jp>
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//
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// Licensed under the terms of the GNU General Public License, version 2.
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#ifndef __ALSA_UTILS_AXFER_SUBCMD__H_
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#define __ALSA_UTILS_AXFER_SUBCMD__H_
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#include <alsa/asoundlib.h>
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int subcmd_list(int argc, char *const *argv, snd_pcm_stream_t direction);
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#endif
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