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diff --git a/src/argb_image.h b/src/argb_image.h
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+/*
+    Copyright (C) 2012-2014 Carl Hetherington <cth@carlh.net>
+
+    This program is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 2 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program; if not, write to the Free Software
+    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+
+*/
+
+/** @file  src/argb_image.h
+ *  @brief ARGBImage class. 
+ */
+
+#include "util.h"
+#include <stdint.h>
+
+namespace dcp
+{
+
+/** @class ARGBImage
+ *  @brief A single frame of picture data held in an ARGB buffer.
+ *
+ *  The format of the data is:
+ *
+ *  <pre>
+ *  Byte   /- 0 -------|- 1 --------|- 2 --------|- 3 --------|- 4 --------|- 5 --------| ...
+ *         |(0, 0) Blue|(0, 0)Green |(0, 0) Red  |(0, 0) Alpha|(0, 1) Blue |(0, 1) Green| ...
+ *  </pre>
+ *
+ *  So that the first byte is the blue component of the pixel at x=0, y=0, the second
+ *  is the green component, and so on.
+ *
+ *  Lines are packed so that the second row directly follows the first.
+ *
+ *  XXX: this should probably be an Image...?
+ */
+class ARGBImage : boost::noncopyable
+{
+public:
+	ARGBImage (Size size);
+	~ARGBImage ();
+
+	/** @return pointer to the image data */
+	uint8_t* data () const {
+		return _data;
+	}
+
+	/** @return length of one picture row in bytes */
+	int stride () const;
+
+	/** @return size of the picture in pixels */
+	Size size () const {
+		return _size;
+	}
+
+private:
+	Size _size;     ///< frame size in pixels
+	uint8_t* _data; ///< pointer to image data
+};
+
+}