1 files changed, 88 insertions, 0 deletions

diff --git a/include/midillo/chunk.h b/include/midillo/chunk.h
new file mode 100644
index 0000000..8b6c034
--- a/dev/null
+++ b/include/midillo/chunk.h
@@ -0,0 +1,88 @@
+#ifndef __MIDILLO_CHUNK_H
+#define __MIDILLO_CHUNK_H
+
+#include <istream>
+#include <ostream>
+
+/**
+ * @file
+ * @brief Generic SMF chunk manipulation
+ */
+
+namespace midillo {
+    using std::istream;
+    using std::ostream;
+
+    enum {
+        chunk_id_MThd = 0x6468544d,
+        chunk_id_MTrk = 0x6b72544d
+    };
+    /**
+     * Chunk header data structure
+     */
+    struct chunk_header_t {
+        /**
+         * Track signature data
+         */
+        union {
+            /**
+             * ASCII representation
+             */
+            char id_chars[4];
+            /**
+             * long integer representation
+             */
+            unsigned long  id_number;
+        };
+        /**
+         * Chunk length
+         */
+        unsigned long length;
+
+        chunk_header_t()
+            : id_number(0), length(0) { }
+        chunk_header_t(const chunk_header_t& s)
+            : id_number(s.id_number), length(s.length) { };
+
+        chunk_header_t& operator=(const chunk_header_t& s) {
+            id_number=s.id_number; length=s.length;
+            return *this;
+        }
+
+        /**
+         * Load chunk header from the stream
+         * @param s input stream
+         */
+        void load(istream& s);
+        /**
+         * Save chunk header to the stream
+         * @param s output stream
+         */
+        void save(ostream& s) const;
+
+        /**
+         * Dump textual representation of chunk header to stream
+         * @param s output stream
+         */
+        void dump(ostream& s) const;
+
+    };
+
+    inline ostream& operator<<(ostream& s,const chunk_header_t& ch) {
+        ch.dump(s); return s;
+    }
+
+    /**
+     * Base class for specific chunk containers
+     */
+    class chunk_t {
+        public:
+            /**
+             * Chunk header data
+             */
+            chunk_header_t header;
+    };
+
+}
+
+#endif /* __MIDILLO_CHUNK_H */