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author | Jaroslav Kysela <perex@perex.cz> | 2022-05-09 09:34:22 +0200 |
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committer | Jaroslav Kysela <perex@perex.cz> | 2022-05-10 09:08:26 +0200 |
commit | bbc74a61ac7c35e506c3d7f76ecf943cb55736a6 (patch) | |
tree | 36a1a4d187604daba9e4cbac2854746d8e9cda9b /alsactl/info.c | |
parent | 904bc1dfd4a97002e1bb05058cfb15a7f486d493 (diff) | |
download | alsa-utils-bbc74a61ac7c35e506c3d7f76ecf943cb55736a6.tar.gz |
alsactl: implement 'info' command
It may be useful to collect the basic sound card information.
The output is in the YAML structured syntax (human and machine readable).
Signed-off-by: Jaroslav Kysela <perex@perex.cz>
Diffstat (limited to 'alsactl/info.c')
-rw-r--r-- | alsactl/info.c | 261 |
1 files changed, 261 insertions, 0 deletions
diff --git a/alsactl/info.c b/alsactl/info.c new file mode 100644 index 0000000..253539d --- /dev/null +++ b/alsactl/info.c @@ -0,0 +1,261 @@ +/* + * Advanced Linux Sound Architecture Control Program - General info + * Copyright (c) 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + * + */ + +#include "aconfig.h" +#include "alsactl.h" + +static int pcm_device_list(snd_ctl_t *ctl, snd_pcm_stream_t stream, bool *first) +{ +#ifdef __ALSA_PCM_H + int err, dev, idx; + unsigned int count; + snd_pcm_info_t *pcminfo; + snd_pcm_info_alloca(&pcminfo); + bool streamfirst, subfirst; + + dev = -1; + streamfirst = true; + while (1) { + if ((err = snd_ctl_pcm_next_device(ctl, &dev)) < 0) { + error("snd_ctl_pcm_next_device"); + return err; + } + if (dev < 0) + break; + snd_pcm_info_set_device(pcminfo, dev); + snd_pcm_info_set_subdevice(pcminfo, 0); + snd_pcm_info_set_stream(pcminfo, stream); + if ((err = snd_ctl_pcm_info(ctl, pcminfo)) < 0) { + if (err != -ENOENT) + return err; + continue; + } + if (*first) { + printf(" pcm:\n"); + *first = false; + } + if (streamfirst) { + printf(" - stream: %s\n devices:\n", snd_pcm_stream_name(stream)); + streamfirst = false; + } + printf(" - device: %d\n id: %s\n name: %s\n", + dev, + snd_pcm_info_get_id(pcminfo), + snd_pcm_info_get_name(pcminfo)); + count = snd_pcm_info_get_subdevices_count(pcminfo); + subfirst = true; + for (idx = 0; idx < (int)count; idx++) { + snd_pcm_info_set_subdevice(pcminfo, idx); + if ((err = snd_ctl_pcm_info(ctl, pcminfo)) < 0) { + error("control digital audio playback info (%s): %s", snd_ctl_name(ctl), snd_strerror(err)); + return err; + } + if (subfirst) { + printf(" subdevices:\n"); + subfirst = false; + } + printf(" - subdevice: %d\n name: %s\n", + idx, snd_pcm_info_get_subdevice_name(pcminfo)); + } + } +#endif + return 0; +} + +static const char *snd_rawmidi_stream_name(snd_rawmidi_stream_t stream) +{ + if (stream == SND_RAWMIDI_STREAM_INPUT) + return "INPUT"; + if (stream == SND_RAWMIDI_STREAM_OUTPUT) + return "OUTPUT"; + return "???"; +} + +static int rawmidi_device_list(snd_ctl_t *ctl, snd_rawmidi_stream_t stream, bool *first) +{ +#ifdef __ALSA_RAWMIDI_H + int err, dev, idx; + unsigned int count; + snd_rawmidi_info_t *info; + snd_rawmidi_info_alloca(&info); + bool streamfirst, subfirst; + + dev = -1; + streamfirst = true; + while (1) { + if ((err = snd_ctl_rawmidi_next_device(ctl, &dev)) < 0) { + error("snd_ctl_rawmidi_next_device"); + return err; + } + if (dev < 0) + break; + snd_rawmidi_info_set_device(info, dev); + snd_rawmidi_info_set_subdevice(info, 0); + snd_rawmidi_info_set_stream(info, stream); + if ((err = snd_ctl_rawmidi_info(ctl, info)) < 0) { + if (err != -ENOENT) + return err; + continue; + } + if (*first) { + printf(" rawmidi:\n"); + *first = false; + } + if (streamfirst) { + printf(" - stream: %s\n devices:\n", snd_rawmidi_stream_name(stream)); + streamfirst = false; + } + printf(" - device: %d\n id: %s\n name: %s\n", + dev, + snd_rawmidi_info_get_id(info), + snd_rawmidi_info_get_name(info)); + count = snd_rawmidi_info_get_subdevices_count(info); + subfirst = true; + for (idx = 0; idx < (int)count; idx++) { + snd_rawmidi_info_set_subdevice(info, idx); + if ((err = snd_ctl_rawmidi_info(ctl, info)) < 0) { + error("control digital audio playback info (%s): %s", snd_ctl_name(ctl), snd_strerror(err)); + return err; + } + if (subfirst) { + printf(" subdevices:\n"); + subfirst = false; + } + printf(" - subdevice: %d\n name: %s\n", + idx, snd_rawmidi_info_get_subdevice_name(info)); + } + } +#endif + return 0; +} + +static int hwdep_device_list(snd_ctl_t *ctl) +{ +#ifdef __ALSA_HWDEP_H + int err, dev; + snd_hwdep_info_t *info; + snd_hwdep_info_alloca(&info); + bool first; + + dev = -1; + first = true; + while (1) { + if ((err = snd_ctl_hwdep_next_device(ctl, &dev)) < 0) { + error("snd_ctl_pcm_next_device"); + return err; + } + if (dev < 0) + break; + snd_hwdep_info_set_device(info, dev); + if ((err = snd_ctl_hwdep_info(ctl, info)) < 0) { + if (err != -ENOENT) + return err; + continue; + } + if (first) { + printf(" hwdep:\n"); + first = false; + } + printf(" - device: %d\n id: %s\n name: %s\n iface: %d\n", + dev, + snd_hwdep_info_get_id(info), + snd_hwdep_info_get_name(info), + snd_hwdep_info_get_iface(info)); + } +#endif + return 0; +} + +static int card_info(snd_ctl_t *ctl) +{ + snd_ctl_card_info_t *info; + snd_ctl_elem_list_t *clist; + int err; + + snd_ctl_card_info_alloca(&info); + snd_ctl_elem_list_alloca(&clist); + + if ((err = snd_ctl_card_info(ctl, info)) < 0) { + error("Control device %s hw info error: %s", snd_ctl_name(ctl), snd_strerror(err)); + return err; + } + printf("#\n# Sound card\n#\n"); + printf("- card: %i\n id: %s\n name: %s\n longname: %s\n", + snd_ctl_card_info_get_card(info), + snd_ctl_card_info_get_id(info), + snd_ctl_card_info_get_name(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(ctl, clist)) < 0) { + error("snd_ctl_elem_list failure: %s", snd_strerror(err)); + } else { + printf(" controls_count: %i\n", snd_ctl_elem_list_get_count(clist)); + } + return err; +} + +int general_card_info(int cardno) +{ + snd_ctl_t *ctl; + char dev[16]; + bool first; + int err; + + snprintf(dev, sizeof(dev), "hw:%i", cardno); + if ((err = snd_ctl_open(&ctl, dev, 0)) < 0) { + error("Control device %s open error: %s", dev, snd_strerror(err)); + return err; + } + err = card_info(ctl); + + first = true; + if (err >= 0) + err = pcm_device_list(ctl, SND_PCM_STREAM_PLAYBACK, &first); + if (err >= 0) + err = pcm_device_list(ctl, SND_PCM_STREAM_CAPTURE, &first); + + first = true; + if (err >= 0) + err = rawmidi_device_list(ctl, SND_PCM_STREAM_PLAYBACK, &first); + if (err >= 0) + err = rawmidi_device_list(ctl, SND_PCM_STREAM_CAPTURE, &first); + + if (err >= 0) + err = hwdep_device_list(ctl); + snd_ctl_close(ctl); + return err; +} + +int general_info(const char *cardname) +{ + struct snd_card_iterator iter; + int err; + + err = snd_card_iterator_sinit(&iter, cardname); + if (err < 0) + return err; + while (snd_card_iterator_next(&iter)) { + if ((err = general_card_info(iter.card))) + return err; + } + return snd_card_iterator_error(&iter); +} |