diff options
author | Robin Gareus <robin@gareus.org> | 2014-06-04 19:16:37 +0200 |
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committer | Robin Gareus <robin@gareus.org> | 2014-06-04 19:16:37 +0200 |
commit | a907d3455ef4122f35f509cf0638a45aca8d3b7b (patch) | |
tree | af66b94f55e7b7419802d722ea7bc81fb885b855 /libs/ardouralsautil/devicelist.cc | |
parent | 40cfe86569daeacf44855befc335a5a5bce61b5f (diff) |
break out ALSA related functions into libardouralsautil
Diffstat (limited to 'libs/ardouralsautil/devicelist.cc')
-rw-r--r-- | libs/ardouralsautil/devicelist.cc | 200 |
1 files changed, 200 insertions, 0 deletions
diff --git a/libs/ardouralsautil/devicelist.cc b/libs/ardouralsautil/devicelist.cc new file mode 100644 index 0000000000..31957a80cf --- /dev/null +++ b/libs/ardouralsautil/devicelist.cc @@ -0,0 +1,200 @@ +/* + * Copyright (C) 2014 Robin Gareus <robin@gareus.org> + * Copyright (C) 2013 Paul Davis + * + * 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., 675 Mass Ave, Cambridge, MA 02139, USA. + */ + +#include <alsa/asoundlib.h> +#include "pbd/convert.h" +#include "ardouralsautil/devicelist.h" + +using namespace std; + +void +ARDOUR::get_alsa_audio_device_names (std::map<std::string, std::string>& devices) +{ + snd_ctl_t *handle; + snd_ctl_card_info_t *info; + snd_pcm_info_t *pcminfo; + snd_ctl_card_info_alloca(&info); + snd_pcm_info_alloca(&pcminfo); + string devname; + int cardnum = -1; + int device = -1; + + while (snd_card_next (&cardnum) >= 0 && cardnum >= 0) { + + devname = "hw:"; + devname += PBD::to_string (cardnum, std::dec); + + if (snd_ctl_open (&handle, devname.c_str(), 0) >= 0 && snd_ctl_card_info (handle, info) >= 0) { + + if (snd_ctl_card_info (handle, info) < 0) { + continue; + } + + string card_name = snd_ctl_card_info_get_name (info); + + /* change devname to use ID, not number */ + + devname = "hw:"; + devname += snd_ctl_card_info_get_id (info); + + while (snd_ctl_pcm_next_device (handle, &device) >= 0 && device >= 0) { + + /* only detect duplex devices here. more + * complex arrangements are beyond our scope + */ + + snd_pcm_info_set_device (pcminfo, device); + snd_pcm_info_set_subdevice (pcminfo, 0); + snd_pcm_info_set_stream (pcminfo, SND_PCM_STREAM_CAPTURE); + + if (snd_ctl_pcm_info (handle, pcminfo) < 0) { + continue; + } + + snd_pcm_info_set_device (pcminfo, device); + snd_pcm_info_set_subdevice (pcminfo, 0); + snd_pcm_info_set_stream (pcminfo, SND_PCM_STREAM_PLAYBACK); + + if (snd_ctl_pcm_info (handle, pcminfo) < 0) { + continue; + } + devname += ','; + devname += PBD::to_string (device, std::dec); + devices.insert (std::make_pair (card_name, devname)); + } + + snd_ctl_close(handle); + } + } +} + +void +ARDOUR::get_alsa_rawmidi_device_names (std::map<std::string, std::string>& devices) +{ + int cardnum = -1; + snd_ctl_card_info_t *cinfo; + snd_ctl_card_info_alloca (&cinfo); + while (snd_card_next (&cardnum) >= 0 && cardnum >= 0) { + snd_ctl_t *handle; + std::string devname = "hw:"; + devname += PBD::to_string (cardnum, std::dec); + if (snd_ctl_open (&handle, devname.c_str (), 0) >= 0 && snd_ctl_card_info (handle, cinfo) >= 0) { + int device = -1; + while (snd_ctl_rawmidi_next_device (handle, &device) >= 0 && device >= 0) { + snd_rawmidi_info_t *info; + snd_rawmidi_info_alloca (&info); + snd_rawmidi_info_set_device (info, device); + + int subs_in, subs_out; + + snd_rawmidi_info_set_stream (info, SND_RAWMIDI_STREAM_INPUT); + if (snd_ctl_rawmidi_info (handle, info) >= 0) { + subs_in = snd_rawmidi_info_get_subdevices_count (info); + } else { + subs_in = 0; + } + + snd_rawmidi_info_set_stream (info, SND_RAWMIDI_STREAM_OUTPUT); + if (snd_ctl_rawmidi_info (handle, info) >= 0) { + subs_out = snd_rawmidi_info_get_subdevices_count (info); + } else { + subs_out = 0; + } + + const int subs = subs_in > subs_out ? subs_in : subs_out; + if (!subs) { + continue; + } + + for (int sub = 0; sub < subs; ++sub) { + snd_rawmidi_info_set_stream (info, sub < subs_in ? + SND_RAWMIDI_STREAM_INPUT : + SND_RAWMIDI_STREAM_OUTPUT); + + snd_rawmidi_info_set_subdevice (info, sub); + if (snd_ctl_rawmidi_info (handle, info) < 0) { + continue; + } + + const char *sub_name = snd_rawmidi_info_get_subdevice_name (info); + if (sub == 0 && sub_name[0] == '\0') { + devname = "hw:"; + devname += snd_ctl_card_info_get_id (cinfo); + devname += ","; + devname += PBD::to_string (device, std::dec); + + std::string card_name; + card_name = snd_rawmidi_info_get_name (info); + card_name += " ("; + if (sub < subs_in) card_name += "I"; + if (sub < subs_out) card_name += "O"; + card_name += ")"; + + devices.insert (std::make_pair (card_name, devname)); + break; + } else { + devname = "hw:"; + devname += snd_ctl_card_info_get_id (cinfo); + devname += ","; + devname += PBD::to_string (device, std::dec); + devname += ","; + devname += PBD::to_string (sub, std::dec); + + std::string card_name = sub_name; + card_name += " ("; + if (sub < subs_in) card_name += "I"; + if (sub < subs_out) card_name += "O"; + card_name += ")"; + devices.insert (std::make_pair (card_name, devname)); + } + } + } + snd_ctl_close (handle); + } + } +} + +int +ARDOUR::card_to_num(const char* device_name) +{ + char* ctl_name; + const char * comma; + snd_ctl_t* ctl_handle; + int i = -1; + + if (strncasecmp(device_name, "plughw:", 7) == 0) { + device_name += 4; + } + if (!(comma = strchr(device_name, ','))) { + ctl_name = strdup(device_name); + } else { + ctl_name = strndup(device_name, comma - device_name); + } + + if (snd_ctl_open (&ctl_handle, ctl_name, 0) >= 0) { + snd_ctl_card_info_t *card_info; + snd_ctl_card_info_alloca (&card_info); + if (snd_ctl_card_info(ctl_handle, card_info) >= 0) { + i = snd_ctl_card_info_get_card(card_info); + } + snd_ctl_close(ctl_handle); + } + free(ctl_name); + return i; +} |