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alsa sequencer device/port listing

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This commit is contained in:
Robin Gareus 2014-06-21 11:49:40 +02:00
parent 5d6dc388f7
commit 359a968e61
2 changed files with 53 additions and 0 deletions
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1
libs/ardouralsautil/ardouralsautil/devicelist.h
View File

@ -26,6 +26,7 @@ namespace ARDOUR {
void get_alsa_audio_device_names (std::map<std::string, std::string>& devices);
void get_alsa_rawmidi_device_names (std::map<std::string, std::string>& devices);
void get_alsa_sequencer_names (std::map<std::string, std::string>& devices);
int card_to_num(const char* device_name);
}

52
libs/ardouralsautil/devicelist.cc
View File

@ -170,6 +170,58 @@ ARDOUR::get_alsa_rawmidi_device_names (std::map<std::string, std::string>& devic
}
}
void
ARDOUR::get_alsa_sequencer_names (std::map<std::string, std::string>& devices)
{
snd_seq_t *seq= NULL;
snd_seq_client_info_t *cinfo;
snd_seq_port_info_t *pinfo;
snd_seq_client_info_alloca (&cinfo);
snd_seq_port_info_alloca (&pinfo);
if (snd_seq_open (&seq, "hw", SND_SEQ_OPEN_DUPLEX, 0) < 0) {
return;
}
snd_seq_client_info_set_client(cinfo, -1);
while (snd_seq_query_next_client (seq, cinfo) >= 0) {
int client = snd_seq_client_info_get_client (cinfo);
if (client == SND_SEQ_CLIENT_SYSTEM) {
continue;
}
if (!strcmp (snd_seq_client_info_get_name(cinfo), "Midi Through")) {
continue;
}
snd_seq_port_info_set_client (pinfo, client);
snd_seq_port_info_set_port (pinfo, -1);
while (snd_seq_query_next_port (seq, pinfo) >= 0) {
int caps = snd_seq_port_info_get_capability(pinfo);
if (0 == (caps & (SND_SEQ_PORT_CAP_READ | SND_SEQ_PORT_CAP_WRITE))) {
continue;
}
if (caps & SND_SEQ_PORT_CAP_NO_EXPORT) {
continue;
}
std::string card_name;
card_name = snd_seq_port_info_get_name (pinfo);
card_name += " (";
if (caps & SND_SEQ_PORT_CAP_READ) card_name += "I";
if (caps & SND_SEQ_PORT_CAP_WRITE) card_name += "O";
card_name += ")";
std::string devname;
devname = PBD::to_string(snd_seq_port_info_get_client (pinfo), std::dec);
devname += ":";
devname += PBD::to_string(snd_seq_port_info_get_port (pinfo), std::dec);
devices.insert (std::make_pair (card_name, devname));
}
}
snd_seq_close (seq);
}
int
ARDOUR::card_to_num(const char* device_name)
{