Update the UI with state changes and new ALSA cards as they come in.

[nageru] / audio_mixer.h

diff --git a/audio_mixer.h b/audio_mixer.h
index 855295dcd60f0bf207f435c75484a763eba77b89..2e73ebd7a1e7e68ff29dee3024dbc90b8911b316 100644 (file)
--- a/audio_mixer.h
+++ b/audio_mixer.h
@@ -262,6 +262,24 @@ public:
                audio_level_callback = callback;
        }
 
+       typedef std::function<void()> state_changed_callback_t;
+       void set_state_changed_callback(state_changed_callback_t callback)
+       {
+               state_changed_callback = callback;
+       }
+
+       state_changed_callback_t get_state_changed_callback() const
+       {
+               return state_changed_callback;
+       }
+
+       void trigger_state_changed_callback()
+       {
+               if (state_changed_callback != nullptr) {
+                       state_changed_callback();
+               }
+       }
+
 private:
        struct AudioDevice {
                std::unique_ptr<ResamplingQueue> resampling_queue;
@@ -338,6 +356,7 @@ private:
        std::atomic<float> eq_level_db[MAX_BUSES][NUM_EQ_BANDS] {{{ 0.0f }}};
 
        audio_level_callback_t audio_level_callback = nullptr;
+       state_changed_callback_t state_changed_callback = nullptr;
        mutable std::mutex audio_measure_mutex;
        Ebu_r128_proc r128;  // Under audio_measure_mutex.
        CorrelationMeasurer correlation;  // Under audio_measure_mutex.