+ /* Get the number of output channels from pulseaudio. A simple task, you say?
+ "What is your mainloop?" */
+ mainloop_ = pa_threaded_mainloop_new();
+ if (!mainloop_) {
+ return info;
+ }
+
+ pa_threaded_mainloop_start(mainloop_);
+ pa_threaded_mainloop_lock(mainloop_);
+
+ /* "And what is your context?" */
+ pa_context* context = pa_context_new(pa_threaded_mainloop_get_api(mainloop_), "RtAudio");
+ if (!context) {
+ pa_threaded_mainloop_unlock(mainloop_);
+ pa_threaded_mainloop_stop(mainloop_);
+ pa_threaded_mainloop_free(mainloop_);
+ mainloop_ = 0;
+ return info;
+ }
+
+ pa_context_set_state_callback(context, contextStateCallback, mainloop_);
+
+ pa_context_connect(context, 0, (pa_context_flags_t) 0, 0);
+
+ /* "And what is your favourite colour?" */
+ int connected = 0;
+ pa_context_state_t state = pa_context_get_state(context);
+ for (; !connected; state = pa_context_get_state(context)) {
+ switch (state) {
+ case PA_CONTEXT_READY:
+ connected = 1;
+ continue;
+ case PA_CONTEXT_FAILED:
+ case PA_CONTEXT_TERMINATED:
+ /* Blue! No, I mean red! */
+ pa_threaded_mainloop_unlock(mainloop_);
+ pa_context_disconnect(context);
+ pa_context_unref(context);
+ pa_threaded_mainloop_stop(mainloop_);
+ pa_threaded_mainloop_free(mainloop_);
+ mainloop_ = 0;
+ return info;
+ default:
+ pa_threaded_mainloop_wait(mainloop_);
+ break;
+ }
+ }
+
+ pa_operation* op = pa_context_get_sink_info_by_index(context, 0, sinkInfoCallback, this);
+
+ if (op) {
+ pa_operation_unref(op);
+ }
+
+ pa_threaded_mainloop_wait(mainloop_);
+ pa_threaded_mainloop_unlock(mainloop_);
+
+ pa_context_disconnect(context);
+ pa_context_unref(context);
+
+ pa_threaded_mainloop_stop(mainloop_);
+ pa_threaded_mainloop_free(mainloop_);
+ mainloop_ = 0;
+
+ info.outputChannels = channels_;
+