Extract EigerAssembler from RamBuffer

jf-assembler/include/EigerAssembler.hpp

@@ -0,0 +1,27 @@
+
+#ifndef SF_DAQ_BUFFER_EIGERASSEMBLER_HPP
+#define SF_DAQ_BUFFER_EIGERASSEMBLER_HPP
+
+
+#include <cstddef>
+
+class EigerAssembler {
+    const int n_modules_;
+    const int bit_depth_;
+
+    const uint32_t n_bytes_per_frame_;
+    const uint32_t n_bytes_per_module_line_;
+    const uint32_t n_packets_per_frame_;
+    const uint32_t n_bytes_per_gap_;
+    const uint32_t n_bytes_per_image_line_;
+    const int n_lines_per_frame_;
+
+public:
+    EigerAssembler(const int n_modules, const int bit_depth);
+    void assemble_image(const char* src_meta, const char* src_data,
+                        char* dst_meta, char* dst_data) const;
+    size_t get_image_n_bytes();
+};
+
+
+#endif //SF_DAQ_BUFFER_EIGERASSEMBLER_HPP