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livetrax/libs/ardouralsautil/devicelist.cc

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/*
* 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;
}