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 */