1 files changed, 56 insertions, 0 deletions
diff --git a/editor/audio_stream_preview.h b/editor/audio_stream_preview.h
new file mode 100644
index 0000000000..cfe1667e9d
--- /dev/null
+++ b/editor/audio_stream_preview.h
@@ -0,0 +1,56 @@
+#ifndef AUDIO_STREAM_PREVIEW_H
+#define AUDIO_STREAM_PREVIEW_H
+
+#include "os/thread.h"
+#include "scene/main/node.h"
+#include "servers/audio/audio_stream.h"
+
+class AudioStreamPreview : public Reference {
+	GDCLASS(AudioStreamPreview, Reference)
+	friend class AudioStream;
+	Vector<uint8_t> preview;
+	float length;
+
+	friend class AudioStreamPreviewGenerator;
+
+public:
+	float get_length() const;
+	float get_max(float p_time, float p_time_next) const;
+	float get_min(float p_time, float p_time_next) const;
+
+	AudioStreamPreview();
+};
+
+class AudioStreamPreviewGenerator : public Node {
+	GDCLASS(AudioStreamPreviewGenerator, Node)
+
+	static AudioStreamPreviewGenerator *singleton;
+
+	struct Preview {
+		Ref<AudioStreamPreview> preview;
+		Ref<AudioStream> base_stream;
+		Ref<AudioStreamPlayback> playback;
+		volatile bool generating;
+		ObjectID id;
+		Thread *thread;
+	};
+
+	Map<ObjectID, Preview> previews;
+
+	static void _preview_thread(void *p_preview);
+
+	void _update_emit(ObjectID p_id);
+
+protected:
+	void _notification(int p_what);
+	static void _bind_methods();
+
+public:
+	static AudioStreamPreviewGenerator *get_singleton() { return singleton; }
+
+	Ref<AudioStreamPreview> generate_preview(const Ref<AudioStream> &p_preview);
+
+	AudioStreamPreviewGenerator();
+};
+
+#endif // AUDIO_STREAM_PREVIEW_H