+}
+
+void
+SoundPage::config_changed ()
+{
+ Config* config = Config::instance ();
+
+ checked_set (_sound, config->sound ());
+
+ optional<string> const current_so = get_sound_output ();
+ optional<string> configured_so;
+
+ if (config->sound_output()) {
+ configured_so = config->sound_output().get();
+ } else {
+ /* No configured output means we should use the default */
+ RtAudio audio (DCPOMATIC_RTAUDIO_API);
+ try {
+ configured_so = audio.getDeviceInfo(audio.getDefaultOutputDevice()).name;
+ } catch (RtAudioError& e) {
+ /* Probably no audio devices at all */
+ }
+ }
+
+ if (configured_so && current_so != configured_so) {
+ /* Update _sound_output with the configured value */
+ unsigned int i = 0;
+ while (i < _sound_output->GetCount()) {
+ if (_sound_output->GetString(i) == std_to_wx(*configured_so)) {
+ _sound_output->SetSelection (i);
+ break;
+ }
+ ++i;
+ }
+ }
+
+ RtAudio audio (DCPOMATIC_RTAUDIO_API);
+
+ map<int, wxString> apis;
+ apis[RtAudio::MACOSX_CORE] = _("CoreAudio");
+ apis[RtAudio::WINDOWS_ASIO] = _("ASIO");
+ apis[RtAudio::WINDOWS_DS] = _("Direct Sound");
+ apis[RtAudio::WINDOWS_WASAPI] = _("WASAPI");
+ apis[RtAudio::UNIX_JACK] = _("JACK");
+ apis[RtAudio::LINUX_ALSA] = _("ALSA");
+ apis[RtAudio::LINUX_PULSE] = _("PulseAudio");
+ apis[RtAudio::LINUX_OSS] = _("OSS");
+ apis[RtAudio::RTAUDIO_DUMMY] = _("Dummy");
+
+ int channels = 0;
+ if (configured_so) {
+ for (unsigned int i = 0; i < audio.getDeviceCount(); ++i) {
+ RtAudio::DeviceInfo info = audio.getDeviceInfo(i);
+ if (info.name == *configured_so && info.outputChannels > 0) {
+ channels = info.outputChannels;
+ }
+ }
+ }
+
+ _sound_output_details->SetLabel (
+ wxString::Format(_("%d channels on %s"), channels, apis[audio.getCurrentApi()])
+ );
+
+ _map->set (Config::instance()->audio_mapping(channels));
+
+ vector<string> input;
+ for (int i = 0; i < MAX_DCP_AUDIO_CHANNELS; ++i) {
+ input.push_back (short_audio_channel_name(i));
+ }
+ _map->set_input_channels (input);
+
+ vector<string> output;
+ for (int i = 0; i < channels; ++i) {
+ output.push_back (dcp::raw_convert<string>(i));
+ }
+ _map->set_output_channels (output);
+
+ setup_sensitivity ();
+}
+
+void
+SoundPage::setup_sensitivity ()
+{
+ _sound_output->Enable (_sound->GetValue());
+}
+
+/** @return Currently-selected preview sound output in the dialogue */
+optional<string>
+SoundPage::get_sound_output ()
+{
+ int const sel = _sound_output->GetSelection ();
+ if (sel == wxNOT_FOUND) {
+ return optional<string> ();
+ }
+
+ return wx_to_std (_sound_output->GetString (sel));