alsa_test: add list-devices subcmd

1 files changed, 46 insertions, 0 deletions

diff --git a/src/alsa_test.cpp b/src/alsa_test.cpp
index 58a66e8d..deb2d6da 100644
--- a/src/alsa_test.cpp
+++ b/src/alsa_test.cpp
@@ -322,6 +322,31 @@ private:
 snd_mixer_selem_id_t *sid;
 snd_mixer_elem_t* elem;
 };
+
+std::vector<std::string> get_devices(std::string io) {
+ std::vector<std::string> result;
+ void **out;
+ int err = snd_device_name_hint(-1 /* all cards */, "pcm", &out);
+ if (err) {
+ logger.normal() << "Couldn't get the device hints" << std::endl;
+ return result;
+ }
+ while (*out) {
+ const char *name = snd_device_name_get_hint(*out, "NAME");
+ const char *desc = snd_device_name_get_hint(*out, "DESC");
+ const char *ioid = snd_device_name_get_hint(*out, "IOID");
+ if (ioid == nullptr) ioid = "Both";
+ logger.info() << "Got a device hint. Name: " << name
+ << " Description: " << desc
+ << " IOID: " << ioid << std::endl;
+ std::string direction{ioid};
+ if (direction == io) {
+ result.push_back(std::string{name});
+ }
+ out++;
+ }
+ return result;
+}
 }; //namespace Alsa
 
 template<class storage_type>
@@ -407,6 +432,24 @@ int list_formats(){
 std::cout << "description: " << format.second << std::endl;
 std::cout << std::endl;
 }
+ return 0;
+}
+
+int list_devices() {
+ auto playback = Alsa::get_devices("Output");
+ auto record = Alsa::get_devices("Input");
+ auto both = Alsa::get_devices("Both");
+ std::copy(both.begin(), both.end(), std::back_inserter(playback));
+ std::copy(both.begin(), both.end(), std::back_inserter(record));
+ std::cout << "Playback devices: " << std::endl;
+ for (auto i = playback.cbegin(); i != playback.cend(); ++i) {
+ std::cout << *i << std::endl;
+ }
+ std::cout << "\n\nRecording devices: " << std::endl;
+ for (auto i = record.cbegin(); i != record.cend(); ++i) {
+ std::cout << *i << std::endl;
+ }
+ return 0;
 }
 
 void set_volumes(const std::string playback_pcm, const std::string capture_pcm) {
@@ -503,6 +546,9 @@ int main(int argc, char *argv[]) {
 else if (scenario == "list-formats") {
 return list_formats();
 }
+ else if (scenario == "list-devices") {
+ return list_devices();
+ }
 if (scenarios.find(args[1]) == scenarios.end()) {
 std::cerr << args[1] << " scenario not found!" << std::endl;
 return 1;