add fallback option if multiple audio matches are active (#95)

src/headers/advanced-scene-switcher.hpp

@@ -184,6 +184,7 @@ public slots:
 	void on_audioRemove_clicked();
 	void on_audioUp_clicked();
 	void on_audioDown_clicked();
+	void on_audioFallback_toggled(bool on);
 
 	void on_priorityUp_clicked();
 	void on_priorityDown_clicked();

src/headers/switch-audio.hpp

@@ -44,6 +44,13 @@ struct AudioSwitch : virtual SceneSwitcherEntry {
 	friend void swap(AudioSwitch &first, AudioSwitch &second);
 };
 
+struct AudioSwitchFallback : virtual SceneSwitcherEntry {
+	const char *getType() { return "audio_fallback"; }
+	bool enable = false;
+	double duration = 0;
+	unsigned int matchCount = 0;
+};
+
 class AudioSwitchWidget : public SwitchWidget {
 	Q_OBJECT
 
@@ -71,3 +78,18 @@ private:
 
 	AudioSwitch *switchData;
 };
+
+class AudioSwitchFallbackWidget : public SwitchWidget {
+	Q_OBJECT
+
+public:
+	AudioSwitchFallbackWidget(AudioSwitchFallback *s);
+
+private slots:
+	void DurationChanged(double dur);
+
+private:
+	QDoubleSpinBox *duration;
+
+	AudioSwitchFallback *switchData;
+};

src/headers/switcher-data-structs.hpp

@@ -111,6 +111,7 @@ struct SwitcherData {
 	QDateTime liveTime;
 
 	std::deque<AudioSwitch> audioSwitches;
+	AudioSwitchFallback audioFallback;
 
 	std::vector<int> functionNamesByPriority = std::vector<int>{
 		default_priority_0, default_priority_1, default_priority_2,
@@ -188,6 +189,8 @@ struct SwitcherData {
 			     OBSWeakSource &transition);
 	void checkAudioSwitch(bool &match, OBSWeakSource &scene,
 			      OBSWeakSource &transition);
+	void checkAudioSwitchFallback(OBSWeakSource &scene,
+				      OBSWeakSource &transition);
 	void checkNoMatchSwitch(bool &match, OBSWeakSource &scene,
 				OBSWeakSource &transition, int &sleep);
 	void checkSwitchCooldown(bool &match);