after 2 weeks of porting over the ngc_ft1 code to solanaceae and rewriting the highlevel logic

(29 commits predate this)

solanaceae/ngc_ft1/snd_buf.hpp

@@ -0,0 +1,33 @@
+#pragma once
+
+#include <vector>
+#include <map>
+#include <cstdint>
+
+struct SendSequenceBuffer {
+	struct SSBEntry {
+		std::vector<uint8_t> data; // the data (variable size, but smaller than 500)
+		float time_since_activity {0.f};
+	};
+
+	// sequence_id -> entry
+	std::map<uint16_t, SSBEntry> entries;
+
+	uint16_t next_seq_id {0};
+
+	void erase(uint16_t seq);
+
+	// inflight chunks
+	size_t size(void) const;
+
+	uint16_t add(std::vector<uint8_t>&& data);
+
+	template<typename FN>
+	void for_each(float time_delta, FN&& fn) {
+		for (auto& [id, entry] : entries) {
+			entry.time_since_activity += time_delta;
+			fn(id, entry.data, entry.time_since_activity);
+		}
+	}
+};
+