Split out packet. Delete common.

adsbus/packet.c

@@ -0,0 +1,44 @@
+#include "packet.h"
+
+char *packet_type_names[] = {
+	"Mode-S short",
+	"Mode-S long",
+};
+
+static uint64_t packet_mlat_timestamp_scale_mhz_in(uint64_t timestamp, uint32_t mhz) {
+	return timestamp * (PACKET_MLAT_MHZ / mhz);
+}
+
+static uint64_t packet_mlat_timestamp_scale_width_in(uint64_t timestamp, uint64_t max, struct packet_mlat_state *state) {
+	if (timestamp < state->timestamp_last) {
+		// Counter reset
+		state->timestamp_generation += max;
+	}
+
+	state->timestamp_last = timestamp;
+	return state->timestamp_generation + timestamp;
+}
+
+static uint64_t packet_mlat_timestamp_scale_mhz_out(uint64_t timestamp, uint64_t mhz) {
+	return timestamp / (PACKET_MLAT_MHZ / mhz);
+}
+
+static uint64_t packet_mlat_timestamp_scale_width_out(uint64_t timestamp, uint64_t max) {
+	return timestamp % max;
+}
+
+uint64_t packet_mlat_timestamp_scale_in(uint64_t timestamp, uint64_t max, uint16_t mhz, struct packet_mlat_state *state) {
+	return packet_mlat_timestamp_scale_mhz_in(packet_mlat_timestamp_scale_width_in(timestamp, max, state), mhz);
+}
+
+uint64_t packet_mlat_timestamp_scale_out(uint64_t timestamp, uint64_t max, uint16_t mhz) {
+	return packet_mlat_timestamp_scale_width_out(packet_mlat_timestamp_scale_mhz_out(timestamp, mhz), max);
+}
+
+uint32_t packet_rssi_scale_in(uint32_t value, uint32_t max) {
+	return value * (PACKET_RSSI_MAX / max);
+}
+
+uint32_t packet_rssi_scale_out(uint32_t value, uint32_t max) {
+	return value / (PACKET_RSSI_MAX / max);
+}