comparison win32-mingw/include/FLAC++/metadata.h @ 5:e582a1ccd5fe

Add more mingw builds

+/* libFLAC++ - Free Lossless Audio Codec library
+ * Copyright (C) 2002,2003,2004,2005,2006,2007  Josh Coalson
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *
+ * - Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * - Neither the name of the Xiph.org Foundation nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef FLACPP__METADATA_H
+#define FLACPP__METADATA_H
+
+#include "export.h"
+
+#include "FLAC/metadata.h"
+
+// ===============================================================
+//
+//  Full documentation for the metadata interface can be found
+//  in the C layer in include/FLAC/metadata.h
+//
+// ===============================================================
+
+/** \file include/FLAC++/metadata.h
+ *
+ *  \brief
+ *  This module provides classes for creating and manipulating FLAC
+ *  metadata blocks in memory, and three progressively more powerful
+ *  interfaces for traversing and editing metadata in FLAC files.
+ *
+ *  See the detailed documentation for each interface in the
+ *  \link flacpp_metadata metadata \endlink module.
+ */
+
+/** \defgroup flacpp_metadata FLAC++/metadata.h: metadata interfaces
+ *  \ingroup flacpp
+ *
+ *  \brief
+ *  This module provides classes for creating and manipulating FLAC
+ *  metadata blocks in memory, and three progressively more powerful
+ *  interfaces for traversing and editing metadata in FLAC files.
+ *
+ *  The behavior closely mimics the C layer interface; be sure to read
+ *  the detailed description of the
+ *  \link flac_metadata C metadata module \endlink.  Note that like the
+ *  C layer, currently only the Chain interface (level 2) supports Ogg
+ *  FLAC files, and it is read-only i.e. no writing back changed
+ *  metadata to file.
+ */
+
+
+namespace FLAC {
+	namespace Metadata {
+
+		// ============================================================
+		//
+		//  Metadata objects
+		//
+		// ============================================================
+
+		/** \defgroup flacpp_metadata_object FLAC++/metadata.h: metadata object classes
+		 *  \ingroup flacpp_metadata
+		 *
+		 * This module contains classes representing FLAC metadata
+		 * blocks in memory.
+		 *
+		 * The behavior closely mimics the C layer interface; be
+		 * sure to read the detailed description of the
+		 * \link flac_metadata_object C metadata object module \endlink.
+		 *
+		 * Any time a metadata object is constructed or assigned, you
+		 * should check is_valid() to make sure the underlying
+		 * ::FLAC__StreamMetadata object was able to be created.
+		 *
+		 * \warning
+		 * When the get_*() methods of any metadata object method
+		 * return you a const pointer, DO NOT disobey and write into it.
+		 * Always use the set_*() methods.
+		 *
+		 * \{
+		 */
+
+		/** Base class for all metadata block types.
+		 *  See the \link flacpp_metadata_object overview \endlink for more.
+		 */
+		class FLACPP_API Prototype {
+		protected:
+			//@{
+			/** Constructs a copy of the given object.  This form
+			 *  always performs a deep copy.
+			 */
+			Prototype(const Prototype &);
+			Prototype(const ::FLAC__StreamMetadata &);
+			Prototype(const ::FLAC__StreamMetadata *);
+			//@}
+
+			/** Constructs an object with copy control.  When \a copy
+			 *  is \c true, behaves identically to
+			 *  FLAC::Metadata::Prototype::Prototype(const ::FLAC__StreamMetadata *object).
+			 *  When \a copy is \c false, the instance takes ownership of
+			 *  the pointer and the ::FLAC__StreamMetadata object will
+			 *  be freed by the destructor.
+			 *
+			 *  \assert
+			 *    \code object != NULL \endcode
+			 */
+			Prototype(::FLAC__StreamMetadata *object, bool copy);
+
+			//@{
+			/** Assign from another object.  Always performs a deep copy. */
+			Prototype &operator=(const Prototype &);
+			Prototype &operator=(const ::FLAC__StreamMetadata &);
+			Prototype &operator=(const ::FLAC__StreamMetadata *);
+			//@}
+
+			/** Assigns an object with copy control.  See
+			 *  Prototype(::FLAC__StreamMetadata *object, bool copy).
+			 */
+			Prototype &assign_object(::FLAC__StreamMetadata *object, bool copy);
+
+			/** Deletes the underlying ::FLAC__StreamMetadata object.
+			 */
+			virtual void clear();
+
+			::FLAC__StreamMetadata *object_;
+		public:
+			/** Deletes the underlying ::FLAC__StreamMetadata object.
+			 */
+			virtual ~Prototype();
+
+			//@{
+			/** Check for equality, performing a deep compare by following pointers.
+			 */
+			inline bool operator==(const Prototype &) const;
+			inline bool operator==(const ::FLAC__StreamMetadata &) const;
+			inline bool operator==(const ::FLAC__StreamMetadata *) const;
+			//@}
+
+			//@{
+			/** Check for inequality, performing a deep compare by following pointers. */
+			inline bool operator!=(const Prototype &) const;
+			inline bool operator!=(const ::FLAC__StreamMetadata &) const;
+			inline bool operator!=(const ::FLAC__StreamMetadata *) const;
+			//@}
+
+			friend class SimpleIterator;
+			friend class Iterator;
+
+			/** Returns \c true if the object was correctly constructed
+			 *  (i.e. the underlying ::FLAC__StreamMetadata object was
+			 *  properly allocated), else \c false.
+			 */
+			inline bool is_valid() const;
+
+			/** Returns \c true if this block is the last block in a
+			 *  stream, else \c false.
+			 *
+			 * \assert
+			 *   \code is_valid() \endcode
+			 */
+			bool get_is_last() const;
+
+			/** Returns the type of the block.
+			 *
+			 * \assert
+			 *   \code is_valid() \endcode
+			 */
+			::FLAC__MetadataType get_type() const;
+
+			/** Returns the stream length of the metadata block.
+			 *
+			 * \note
+			 *   The length does not include the metadata block header,
+			 *   per spec.
+			 *
+			 * \assert
+			 *   \code is_valid() \endcode
+			 */
+			unsigned get_length() const;
+
+			/** Sets the "is_last" flag for the block.  When using the iterators
+			 *  it is not necessary to set this flag; they will do it for you.
+			 *
+			 * \assert
+			 *   \code is_valid() \endcode
+			 */
+			void set_is_last(bool);
+
+			/** Returns a pointer to the underlying ::FLAC__StreamMetadata
+			 *  object.  This can be useful for plugging any holes between
+			 *  the C++ and C interfaces.
+			 *
+			 * \assert
+			 *   \code is_valid() \endcode
+			 */
+			inline operator const ::FLAC__StreamMetadata *() const;
+		private:
+			/** Private and undefined so you can't use it. */
+			Prototype();
+
+			// These are used only by Iterator
+			bool is_reference_;
+			inline void set_reference(bool x) { is_reference_ = x; }
+		};
+
+#ifdef _MSC_VER
+// warning C4800: 'int' : forcing to bool 'true' or 'false' (performance warning)
+#pragma warning ( disable : 4800 )
+#endif
+
+		inline bool Prototype::operator==(const Prototype &object) const
+		{ return (bool)::FLAC__metadata_object_is_equal(object_, object.object_); }
+
+		inline bool Prototype::operator==(const ::FLAC__StreamMetadata &object) const
+		{ return (bool)::FLAC__metadata_object_is_equal(object_, &object); }
+
+		inline bool Prototype::operator==(const ::FLAC__StreamMetadata *object) const
+		{ return (bool)::FLAC__metadata_object_is_equal(object_, object); }
+
+#ifdef _MSC_VER
+// @@@ how to re-enable?  the following doesn't work
+// #pragma warning ( enable : 4800 )
+#endif
+
+		inline bool Prototype::operator!=(const Prototype &object) const
+		{ return !operator==(object); }
+
+		inline bool Prototype::operator!=(const ::FLAC__StreamMetadata &object) const
+		{ return !operator==(object); }
+
+		inline bool Prototype::operator!=(const ::FLAC__StreamMetadata *object) const
+		{ return !operator==(object); }
+
+		inline bool Prototype::is_valid() const
+		{ return 0 != object_; }
+
+		inline Prototype::operator const ::FLAC__StreamMetadata *() const
+		{ return object_; }
+
+		/** Create a deep copy of an object and return it. */
+		FLACPP_API Prototype *clone(const Prototype *);
+
+
+		/** STREAMINFO metadata block.
+		 *  See the \link flacpp_metadata_object overview \endlink for more,
+		 *  and the <A HREF="../format.html#metadata_block_streaminfo">format specification</A>.
+		 */
+		class FLACPP_API StreamInfo : public Prototype {
+		public:
+			StreamInfo();
+
+			//@{
+			/** Constructs a copy of the given object.  This form
+			 *  always performs a deep copy.
+			 */
+			inline StreamInfo(const StreamInfo &object): Prototype(object) { }
+			inline StreamInfo(const ::FLAC__StreamMetadata &object): Prototype(object) { }
+			inline StreamInfo(const ::FLAC__StreamMetadata *object): Prototype(object) { }
+			//@}
+
+			/** Constructs an object with copy control.  See
+			 *  Prototype(::FLAC__StreamMetadata *object, bool copy).
+			 */
+			inline StreamInfo(::FLAC__StreamMetadata *object, bool copy): Prototype(object, copy) { }
+
+			~StreamInfo();
+
+			//@{
+			/** Assign from another object.  Always performs a deep copy. */
+			inline StreamInfo &operator=(const StreamInfo &object) { Prototype::operator=(object); return *this; }
+			inline StreamInfo &operator=(const ::FLAC__StreamMetadata &object) { Prototype::operator=(object); return *this; }
+			inline StreamInfo &operator=(const ::FLAC__StreamMetadata *object) { Prototype::operator=(object); return *this; }
+			//@}
+
+			/** Assigns an object with copy control.  See
+			 *  Prototype::assign_object(::FLAC__StreamMetadata *object, bool copy).
+			 */
+			inline StreamInfo &assign(::FLAC__StreamMetadata *object, bool copy) { Prototype::assign_object(object, copy); return *this; }
+
+			//@{
+			/** Check for equality, performing a deep compare by following pointers. */
+			inline bool operator==(const StreamInfo &object) const { return Prototype::operator==(object); }
+			inline bool operator==(const ::FLAC__StreamMetadata &object) const { return Prototype::operator==(object); }
+			inline bool operator==(const ::FLAC__StreamMetadata *object) const { return Prototype::operator==(object); }
+			//@}
+
+			//@{
+			/** Check for inequality, performing a deep compare by following pointers. */
+			inline bool operator!=(const StreamInfo &object) const { return Prototype::operator!=(object); }
+			inline bool operator!=(const ::FLAC__StreamMetadata &object) const { return Prototype::operator!=(object); }
+			inline bool operator!=(const ::FLAC__StreamMetadata *object) const { return Prototype::operator!=(object); }
+			//@}
+
+			//@{
+			/** See <A HREF="../format.html#metadata_block_streaminfo">format specification</A>. */
+			unsigned get_min_blocksize() const;
+			unsigned get_max_blocksize() const;
+			unsigned get_min_framesize() const;
+			unsigned get_max_framesize() const;
+			unsigned get_sample_rate() const;
+			unsigned get_channels() const;
+			unsigned get_bits_per_sample() const;
+			FLAC__uint64 get_total_samples() const;
+			const FLAC__byte *get_md5sum() const;
+
+			void set_min_blocksize(unsigned value);
+			void set_max_blocksize(unsigned value);
+			void set_min_framesize(unsigned value);
+			void set_max_framesize(unsigned value);
+			void set_sample_rate(unsigned value);
+			void set_channels(unsigned value);
+			void set_bits_per_sample(unsigned value);
+			void set_total_samples(FLAC__uint64 value);
+			void set_md5sum(const FLAC__byte value[16]);
+			//@}
+		};
+
+		/** PADDING metadata block.
+		 *  See the \link flacpp_metadata_object overview \endlink for more,
+		 *  and the <A HREF="../format.html#metadata_block_padding">format specification</A>.
+		 */
+		class FLACPP_API Padding : public Prototype {
+		public:
+			Padding();
+
+			//@{
+			/** Constructs a copy of the given object.  This form
+			 *  always performs a deep copy.
+			 */
+			inline Padding(const Padding &object): Prototype(object) { }
+			inline Padding(const ::FLAC__StreamMetadata &object): Prototype(object) { }
+			inline Padding(const ::FLAC__StreamMetadata *object): Prototype(object) { }
+			//@}
+
+			/** Constructs an object with copy control.  See
+			 *  Prototype(::FLAC__StreamMetadata *object, bool copy).
+			 */
+			inline Padding(::FLAC__StreamMetadata *object, bool copy): Prototype(object, copy) { }
+
+			~Padding();
+
+			//@{
+			/** Assign from another object.  Always performs a deep copy. */
+			inline Padding &operator=(const Padding &object) { Prototype::operator=(object); return *this; }
+			inline Padding &operator=(const ::FLAC__StreamMetadata &object) { Prototype::operator=(object); return *this; }
+			inline Padding &operator=(const ::FLAC__StreamMetadata *object) { Prototype::operator=(object); return *this; }
+			//@}
+
+			/** Assigns an object with copy control.  See
+			 *  Prototype::assign_object(::FLAC__StreamMetadata *object, bool copy).
+			 */
+			inline Padding &assign(::FLAC__StreamMetadata *object, bool copy) { Prototype::assign_object(object, copy); return *this; }
+
+			//@{
+			/** Check for equality, performing a deep compare by following pointers. */
+			inline bool operator==(const Padding &object) const { return Prototype::operator==(object); }
+			inline bool operator==(const ::FLAC__StreamMetadata &object) const { return Prototype::operator==(object); }
+			inline bool operator==(const ::FLAC__StreamMetadata *object) const { return Prototype::operator==(object); }
+			//@}
+
+			//@{
+			/** Check for inequality, performing a deep compare by following pointers. */
+			inline bool operator!=(const Padding &object) const { return Prototype::operator!=(object); }
+			inline bool operator!=(const ::FLAC__StreamMetadata &object) const { return Prototype::operator!=(object); }
+			inline bool operator!=(const ::FLAC__StreamMetadata *object) const { return Prototype::operator!=(object); }
+			//@}
+
+			void set_length(unsigned length);
+		};
+
+		/** APPLICATION metadata block.
+		 *  See the \link flacpp_metadata_object overview \endlink for more,
+		 *  and the <A HREF="../format.html#metadata_block_application">format specification</A>.
+		 */
+		class FLACPP_API Application : public Prototype {
+		public:
+			Application();
+			//
+			//@{
+			/** Constructs a copy of the given object.  This form
+			 *  always performs a deep copy.
+			 */
+			inline Application(const Application &object): Prototype(object) { }
+			inline Application(const ::FLAC__StreamMetadata &object): Prototype(object) { }
+			inline Application(const ::FLAC__StreamMetadata *object): Prototype(object) { }
+			//@}
+
+			/** Constructs an object with copy control.  See
+			 *  Prototype(::FLAC__StreamMetadata *object, bool copy).
+			 */
+			inline Application(::FLAC__StreamMetadata *object, bool copy): Prototype(object, copy) { }
+
+			~Application();
+
+			//@{
+			/** Assign from another object.  Always performs a deep copy. */
+			inline Application &operator=(const Application &object) { Prototype::operator=(object); return *this; }
+			inline Application &operator=(const ::FLAC__StreamMetadata &object) { Prototype::operator=(object); return *this; }
+			inline Application &operator=(const ::FLAC__StreamMetadata *object) { Prototype::operator=(object); return *this; }
+			//@}
+
+			/** Assigns an object with copy control.  See
+			 *  Prototype::assign_object(::FLAC__StreamMetadata *object, bool copy).
+			 */
+			inline Application &assign(::FLAC__StreamMetadata *object, bool copy) { Prototype::assign_object(object, copy); return *this; }
+
+			//@{
+			/** Check for equality, performing a deep compare by following pointers. */
+			inline bool operator==(const Application &object) const { return Prototype::operator==(object); }
+			inline bool operator==(const ::FLAC__StreamMetadata &object) const { return Prototype::operator==(object); }
+			inline bool operator==(const ::FLAC__StreamMetadata *object) const { return Prototype::operator==(object); }
+			//@}
+
+			//@{
+			/** Check for inequality, performing a deep compare by following pointers. */
+			inline bool operator!=(const Application &object) const { return Prototype::operator!=(object); }
+			inline bool operator!=(const ::FLAC__StreamMetadata &object) const { return Prototype::operator!=(object); }
+			inline bool operator!=(const ::FLAC__StreamMetadata *object) const { return Prototype::operator!=(object); }
+			//@}
+
+			const FLAC__byte *get_id() const;
+			const FLAC__byte *get_data() const;
+
+			void set_id(const FLAC__byte value[4]);
+			//! This form always copies \a data
+			bool set_data(const FLAC__byte *data, unsigned length);
+			bool set_data(FLAC__byte *data, unsigned length, bool copy);
+		};
+
+		/** SEEKTABLE metadata block.
+		 *  See the \link flacpp_metadata_object overview \endlink for more,
+		 *  and the <A HREF="../format.html#metadata_block_seektable">format specification</A>.
+		 */
+		class FLACPP_API SeekTable : public Prototype {
+		public:
+			SeekTable();
+
+			//@{
+			/** Constructs a copy of the given object.  This form
+			 *  always performs a deep copy.
+			 */
+			inline SeekTable(const SeekTable &object): Prototype(object) { }
+			inline SeekTable(const ::FLAC__StreamMetadata &object): Prototype(object) { }
+			inline SeekTable(const ::FLAC__StreamMetadata *object): Prototype(object) { }
+			//@}
+
+			/** Constructs an object with copy control.  See
+			 *  Prototype(::FLAC__StreamMetadata *object, bool copy).
+			 */
+			inline SeekTable(::FLAC__StreamMetadata *object, bool copy): Prototype(object, copy) { }
+
+			~SeekTable();
+
+			//@{
+			/** Assign from another object.  Always performs a deep copy. */
+			inline SeekTable &operator=(const SeekTable &object) { Prototype::operator=(object); return *this; }
+			inline SeekTable &operator=(const ::FLAC__StreamMetadata &object) { Prototype::operator=(object); return *this; }
+			inline SeekTable &operator=(const ::FLAC__StreamMetadata *object) { Prototype::operator=(object); return *this; }
+			//@}
+
+			/** Assigns an object with copy control.  See
+			 *  Prototype::assign_object(::FLAC__StreamMetadata *object, bool copy).
+			 */
+			inline SeekTable &assign(::FLAC__StreamMetadata *object, bool copy) { Prototype::assign_object(object, copy); return *this; }
+
+			//@{
+			/** Check for equality, performing a deep compare by following pointers. */
+			inline bool operator==(const SeekTable &object) const { return Prototype::operator==(object); }
+			inline bool operator==(const ::FLAC__StreamMetadata &object) const { return Prototype::operator==(object); }
+			inline bool operator==(const ::FLAC__StreamMetadata *object) const { return Prototype::operator==(object); }
+			//@}
+
+			//@{
+			/** Check for inequality, performing a deep compare by following pointers. */
+			inline bool operator!=(const SeekTable &object) const { return Prototype::operator!=(object); }
+			inline bool operator!=(const ::FLAC__StreamMetadata &object) const { return Prototype::operator!=(object); }
+			inline bool operator!=(const ::FLAC__StreamMetadata *object) const { return Prototype::operator!=(object); }
+			//@}
+
+			unsigned get_num_points() const;
+			::FLAC__StreamMetadata_SeekPoint get_point(unsigned index) const;
+
+			//! See FLAC__metadata_object_seektable_set_point()
+			void set_point(unsigned index, const ::FLAC__StreamMetadata_SeekPoint &point);
+
+			//! See FLAC__metadata_object_seektable_insert_point()
+			bool insert_point(unsigned index, const ::FLAC__StreamMetadata_SeekPoint &point);
+
+			//! See FLAC__metadata_object_seektable_delete_point()
+			bool delete_point(unsigned index);
+
+			//! See FLAC__metadata_object_seektable_is_legal()
+			bool is_legal() const;
+		};
+
+		/** VORBIS_COMMENT metadata block.
+		 *  See the \link flacpp_metadata_object overview \endlink for more,
+		 *  and the <A HREF="../format.html#metadata_block_vorbis_comment">format specification</A>.
+		 */
+		class FLACPP_API VorbisComment : public Prototype {
+		public:
+			/** Convenience class for encapsulating Vorbis comment
+			 *  entries.  An entry is a vendor string or a comment
+			 *  field.  In the case of a vendor string, the field
+			 *  name is undefined; only the field value is relevant.
+			 *
+			 *  A \a field as used in the methods refers to an
+			 *  entire 'NAME=VALUE' string; for convenience the
+			 *  string is NUL-terminated.  A length field is
+			 *  required in the unlikely event that the value
+			 *  contains contain embedded NULs.
+			 *
+			 *  A \a field_name is what is on the left side of the
+			 *  first '=' in the \a field.  By definition it is ASCII
+			 *  and so is NUL-terminated and does not require a
+			 *  length to describe it.  \a field_name is undefined
+			 *  for a vendor string entry.
+			 *
+			 *  A \a field_value is what is on the right side of the
+			 *  first '=' in the \a field.  By definition, this may
+			 *  contain embedded NULs and so a \a field_value_length
+			 *  is required to describe it.  However in practice,
+			 *  embedded NULs are not known to be used, so it is
+			 *  generally safe to treat field values as NUL-
+			 *  terminated UTF-8 strings.
+			 *
+			 *  Always check is_valid() after the constructor or operator=
+			 *  to make sure memory was properly allocated and that the
+			 *  Entry conforms to the Vorbis comment specification.
+			 */
+			class FLACPP_API Entry {
+			public:
+				Entry();
+
+				Entry(const char *field, unsigned field_length);
+				Entry(const char *field); // assumes \a field is NUL-terminated
+
+				Entry(const char *field_name, const char *field_value, unsigned field_value_length);
+				Entry(const char *field_name, const char *field_value); // assumes \a field_value is NUL-terminated
+
+				Entry(const Entry &entry);
+
+				Entry &operator=(const Entry &entry);
+
+				virtual ~Entry();
+
+				virtual bool is_valid() const; ///< Returns \c true iff object was properly constructed.
+
+				unsigned get_field_length() const;
+				unsigned get_field_name_length() const;
+				unsigned get_field_value_length() const;
+
+				::FLAC__StreamMetadata_VorbisComment_Entry get_entry() const;
+				const char *get_field() const;
+				const char *get_field_name() const;
+				const char *get_field_value() const;
+
+				bool set_field(const char *field, unsigned field_length);
+				bool set_field(const char *field); // assumes \a field is NUL-terminated
+				bool set_field_name(const char *field_name);
+				bool set_field_value(const char *field_value, unsigned field_value_length);
+				bool set_field_value(const char *field_value); // assumes \a field_value is NUL-terminated
+			protected:
+				bool is_valid_;
+				::FLAC__StreamMetadata_VorbisComment_Entry entry_;
+				char *field_name_;
+				unsigned field_name_length_;
+				char *field_value_;
+				unsigned field_value_length_;
+			private:
+				void zero();
+				void clear();
+				void clear_entry();
+				void clear_field_name();
+				void clear_field_value();
+				void construct(const char *field, unsigned field_length);
+				void construct(const char *field); // assumes \a field is NUL-terminated
+				void construct(const char *field_name, const char *field_value, unsigned field_value_length);
+				void construct(const char *field_name, const char *field_value); // assumes \a field_value is NUL-terminated
+				void compose_field();
+				void parse_field();
+			};
+
+			VorbisComment();
+
+			//@{
+			/** Constructs a copy of the given object.  This form
+			 *  always performs a deep copy.
+			 */
+			inline VorbisComment(const VorbisComment &object): Prototype(object) { }
+			inline VorbisComment(const ::FLAC__StreamMetadata &object): Prototype(object) { }
+			inline VorbisComment(const ::FLAC__StreamMetadata *object): Prototype(object) { }
+			//@}
+
+			/** Constructs an object with copy control.  See
+			 *  Prototype(::FLAC__StreamMetadata *object, bool copy).
+			 */
+			inline VorbisComment(::FLAC__StreamMetadata *object, bool copy): Prototype(object, copy) { }
+
+			~VorbisComment();
+
+			//@{
+			/** Assign from another object.  Always performs a deep copy. */
+			inline VorbisComment &operator=(const VorbisComment &object) { Prototype::operator=(object); return *this; }
+			inline VorbisComment &operator=(const ::FLAC__StreamMetadata &object) { Prototype::operator=(object); return *this; }
+			inline VorbisComment &operator=(const ::FLAC__StreamMetadata *object) { Prototype::operator=(object); return *this; }
+			//@}
+
+			/** Assigns an object with copy control.  See
+			 *  Prototype::assign_object(::FLAC__StreamMetadata *object, bool copy).
+			 */
+			inline VorbisComment &assign(::FLAC__StreamMetadata *object, bool copy) { Prototype::assign_object(object, copy); return *this; }
+
+			//@{
+			/** Check for equality, performing a deep compare by following pointers. */
+			inline bool operator==(const VorbisComment &object) const { return Prototype::operator==(object); }
+			inline bool operator==(const ::FLAC__StreamMetadata &object) const { return Prototype::operator==(object); }
+			inline bool operator==(const ::FLAC__StreamMetadata *object) const { return Prototype::operator==(object); }
+			//@}
+
+			//@{
+			/** Check for inequality, performing a deep compare by following pointers. */
+			inline bool operator!=(const VorbisComment &object) const { return Prototype::operator!=(object); }
+			inline bool operator!=(const ::FLAC__StreamMetadata &object) const { return Prototype::operator!=(object); }
+			inline bool operator!=(const ::FLAC__StreamMetadata *object) const { return Prototype::operator!=(object); }
+			//@}
+
+			unsigned get_num_comments() const;
+			const FLAC__byte *get_vendor_string() const; // NUL-terminated UTF-8 string
+			Entry get_comment(unsigned index) const;
+
+			//! See FLAC__metadata_object_vorbiscomment_set_vendor_string()
+			bool set_vendor_string(const FLAC__byte *string); // NUL-terminated UTF-8 string
+
+			//! See FLAC__metadata_object_vorbiscomment_set_comment()
+			bool set_comment(unsigned index, const Entry &entry);
+
+			//! See FLAC__metadata_object_vorbiscomment_insert_comment()
+			bool insert_comment(unsigned index, const Entry &entry);
+
+			//! See FLAC__metadata_object_vorbiscomment_append_comment()
+			bool append_comment(const Entry &entry);
+
+			//! See FLAC__metadata_object_vorbiscomment_delete_comment()
+			bool delete_comment(unsigned index);
+		};
+
+		/** CUESHEET metadata block.
+		 *  See the \link flacpp_metadata_object overview \endlink for more,
+		 *  and the <A HREF="../format.html#metadata_block_cuesheet">format specification</A>.
+		 */
+		class FLACPP_API CueSheet : public Prototype {
+		public:
+			/** Convenience class for encapsulating a cue sheet
+			 *  track.
+			 *
+			 *  Always check is_valid() after the constructor or operator=
+			 *  to make sure memory was properly allocated.
+			 */
+			class FLACPP_API Track {
+			protected:
+				::FLAC__StreamMetadata_CueSheet_Track *object_;
+			public:
+				Track();
+				Track(const ::FLAC__StreamMetadata_CueSheet_Track *track);
+				Track(const Track &track);
+				Track &operator=(const Track &track);
+
+				virtual ~Track();
+
+				virtual bool is_valid() const; ///< Returns \c true iff object was properly constructed.
+
+
+				inline FLAC__uint64 get_offset() const { return object_->offset; }
+				inline FLAC__byte get_number() const { return object_->number; }
+				inline const char *get_isrc() const { return object_->isrc; }
+				inline unsigned get_type() const { return object_->type; }
+				inline bool get_pre_emphasis() const { return object_->pre_emphasis; }
+
+				inline FLAC__byte get_num_indices() const { return object_->num_indices; }
+				::FLAC__StreamMetadata_CueSheet_Index get_index(unsigned i) const;
+
+				inline const ::FLAC__StreamMetadata_CueSheet_Track *get_track() const { return object_; }
+
+				inline void set_offset(FLAC__uint64 value) { object_->offset = value; }
+				inline void set_number(FLAC__byte value) { object_->number = value; }
+				void set_isrc(const char value[12]);
+				void set_type(unsigned value);
+				inline void set_pre_emphasis(bool value) { object_->pre_emphasis = value? 1 : 0; }
+
+ 				void set_index(unsigned i, const ::FLAC__StreamMetadata_CueSheet_Index &index);
+				//@@@ It's awkward but to insert/delete index points
+				//@@@ you must use the routines in the CueSheet class.
+			};
+
+			CueSheet();
+
+			//@{
+			/** Constructs a copy of the given object.  This form
+			 *  always performs a deep copy.
+			 */
+			inline CueSheet(const CueSheet &object): Prototype(object) { }
+			inline CueSheet(const ::FLAC__StreamMetadata &object): Prototype(object) { }
+			inline CueSheet(const ::FLAC__StreamMetadata *object): Prototype(object) { }
+			//@}
+
+			/** Constructs an object with copy control.  See
+			 *  Prototype(::FLAC__StreamMetadata *object, bool copy).
+			 */
+			inline CueSheet(::FLAC__StreamMetadata *object, bool copy): Prototype(object, copy) { }
+
+			~CueSheet();
+
+			//@{
+			/** Assign from another object.  Always performs a deep copy. */
+			inline CueSheet &operator=(const CueSheet &object) { Prototype::operator=(object); return *this; }
+			inline CueSheet &operator=(const ::FLAC__StreamMetadata &object) { Prototype::operator=(object); return *this; }
+			inline CueSheet &operator=(const ::FLAC__StreamMetadata *object) { Prototype::operator=(object); return *this; }
+			//@}
+
+			/** Assigns an object with copy control.  See
+			 *  Prototype::assign_object(::FLAC__StreamMetadata *object, bool copy).
+			 */
+			inline CueSheet &assign(::FLAC__StreamMetadata *object, bool copy) { Prototype::assign_object(object, copy); return *this; }
+
+			//@{
+			/** Check for equality, performing a deep compare by following pointers. */
+			inline bool operator==(const CueSheet &object) const { return Prototype::operator==(object); }
+			inline bool operator==(const ::FLAC__StreamMetadata &object) const { return Prototype::operator==(object); }
+			inline bool operator==(const ::FLAC__StreamMetadata *object) const { return Prototype::operator==(object); }
+			//@}
+
+			//@{
+			/** Check for inequality, performing a deep compare by following pointers. */
+			inline bool operator!=(const CueSheet &object) const { return Prototype::operator!=(object); }
+			inline bool operator!=(const ::FLAC__StreamMetadata &object) const { return Prototype::operator!=(object); }
+			inline bool operator!=(const ::FLAC__StreamMetadata *object) const { return Prototype::operator!=(object); }
+			//@}
+
+			const char *get_media_catalog_number() const;
+			FLAC__uint64 get_lead_in() const;
+			bool get_is_cd() const;
+
+			unsigned get_num_tracks() const;
+			Track get_track(unsigned i) const;
+
+			void set_media_catalog_number(const char value[128]);
+			void set_lead_in(FLAC__uint64 value);
+			void set_is_cd(bool value);
+
+			void set_index(unsigned track_num, unsigned index_num, const ::FLAC__StreamMetadata_CueSheet_Index &index);
+
+			//! See FLAC__metadata_object_cuesheet_track_insert_index()
+			bool insert_index(unsigned track_num, unsigned index_num, const ::FLAC__StreamMetadata_CueSheet_Index &index);
+
+			//! See FLAC__metadata_object_cuesheet_track_delete_index()
+			bool delete_index(unsigned track_num, unsigned index_num);
+
+			//! See FLAC__metadata_object_cuesheet_set_track()
+			bool set_track(unsigned i, const Track &track);
+
+			//! See FLAC__metadata_object_cuesheet_insert_track()
+			bool insert_track(unsigned i, const Track &track);
+
+			//! See FLAC__metadata_object_cuesheet_delete_track()
+			bool delete_track(unsigned i);
+
+			//! See FLAC__metadata_object_cuesheet_is_legal()
+			bool is_legal(bool check_cd_da_subset = false, const char **violation = 0) const;
+
+			//! See FLAC__metadata_object_cuesheet_calculate_cddb_id()
+			FLAC__uint32 calculate_cddb_id() const;
+		};
+
+		/** PICTURE metadata block.
+		 *  See the \link flacpp_metadata_object overview \endlink for more,
+		 *  and the <A HREF="../format.html#metadata_block_picture">format specification</A>.
+		 */
+		class FLACPP_API Picture : public Prototype {
+		public:
+			Picture();
+
+			//@{
+			/** Constructs a copy of the given object.  This form
+			 *  always performs a deep copy.
+			 */
+			inline Picture(const Picture &object): Prototype(object) { }
+			inline Picture(const ::FLAC__StreamMetadata &object): Prototype(object) { }
+			inline Picture(const ::FLAC__StreamMetadata *object): Prototype(object) { }
+			//@}
+
+			/** Constructs an object with copy control.  See
+			 *  Prototype(::FLAC__StreamMetadata *object, bool copy).
+			 */
+			inline Picture(::FLAC__StreamMetadata *object, bool copy): Prototype(object, copy) { }
+
+			~Picture();
+
+			//@{
+			/** Assign from another object.  Always performs a deep copy. */
+			inline Picture &operator=(const Picture &object) { Prototype::operator=(object); return *this; }
+			inline Picture &operator=(const ::FLAC__StreamMetadata &object) { Prototype::operator=(object); return *this; }
+			inline Picture &operator=(const ::FLAC__StreamMetadata *object) { Prototype::operator=(object); return *this; }
+			//@}
+
+			/** Assigns an object with copy control.  See
+			 *  Prototype::assign_object(::FLAC__StreamMetadata *object, bool copy).
+			 */
+			inline Picture &assign(::FLAC__StreamMetadata *object, bool copy) { Prototype::assign_object(object, copy); return *this; }
+
+			//@{
+			/** Check for equality, performing a deep compare by following pointers. */
+			inline bool operator==(const Picture &object) const { return Prototype::operator==(object); }
+			inline bool operator==(const ::FLAC__StreamMetadata &object) const { return Prototype::operator==(object); }
+			inline bool operator==(const ::FLAC__StreamMetadata *object) const { return Prototype::operator==(object); }
+			//@}
+
+			//@{
+			/** Check for inequality, performing a deep compare by following pointers. */
+			inline bool operator!=(const Picture &object) const { return Prototype::operator!=(object); }
+			inline bool operator!=(const ::FLAC__StreamMetadata &object) const { return Prototype::operator!=(object); }
+			inline bool operator!=(const ::FLAC__StreamMetadata *object) const { return Prototype::operator!=(object); }
+			//@}
+
+			::FLAC__StreamMetadata_Picture_Type get_type() const;
+			const char *get_mime_type() const; // NUL-terminated printable ASCII string
+			const FLAC__byte *get_description() const; // NUL-terminated UTF-8 string
+			FLAC__uint32 get_width() const;
+			FLAC__uint32 get_height() const;
+			FLAC__uint32 get_depth() const;
+			FLAC__uint32 get_colors() const; ///< a return value of \c 0 means true-color, i.e. 2^depth colors
+			FLAC__uint32 get_data_length() const;
+			const FLAC__byte *get_data() const;
+
+			void set_type(::FLAC__StreamMetadata_Picture_Type type);
+
+			//! See FLAC__metadata_object_picture_set_mime_type()
+			bool set_mime_type(const char *string); // NUL-terminated printable ASCII string
+
+			//! See FLAC__metadata_object_picture_set_description()
+			bool set_description(const FLAC__byte *string); // NUL-terminated UTF-8 string
+
+			void set_width(FLAC__uint32 value) const;
+			void set_height(FLAC__uint32 value) const;
+			void set_depth(FLAC__uint32 value) const;
+			void set_colors(FLAC__uint32 value) const; ///< a value of \c 0 means true-color, i.e. 2^depth colors
+
+			//! See FLAC__metadata_object_picture_set_data()
+			bool set_data(const FLAC__byte *data, FLAC__uint32 data_length);
+		};
+
+		/** Opaque metadata block for storing unknown types.
+		 *  This should not be used unless you know what you are doing;
+		 *  it is currently used only internally to support forward
+		 *  compatibility of metadata blocks.
+		 *  See the \link flacpp_metadata_object overview \endlink for more,
+		 */
+		class FLACPP_API Unknown : public Prototype {
+		public:
+			Unknown();
+			//
+			//@{
+			/** Constructs a copy of the given object.  This form
+			 *  always performs a deep copy.
+			 */
+			inline Unknown(const Unknown &object): Prototype(object) { }
+			inline Unknown(const ::FLAC__StreamMetadata &object): Prototype(object) { }
+			inline Unknown(const ::FLAC__StreamMetadata *object): Prototype(object) { }
+			//@}
+
+			/** Constructs an object with copy control.  See
+			 *  Prototype(::FLAC__StreamMetadata *object, bool copy).
+			 */
+			inline Unknown(::FLAC__StreamMetadata *object, bool copy): Prototype(object, copy) { }
+
+			~Unknown();
+
+			//@{
+			/** Assign from another object.  Always performs a deep copy. */
+			inline Unknown &operator=(const Unknown &object) { Prototype::operator=(object); return *this; }
+			inline Unknown &operator=(const ::FLAC__StreamMetadata &object) { Prototype::operator=(object); return *this; }
+			inline Unknown &operator=(const ::FLAC__StreamMetadata *object) { Prototype::operator=(object); return *this; }
+			//@}
+
+			/** Assigns an object with copy control.  See
+			 *  Prototype::assign_object(::FLAC__StreamMetadata *object, bool copy).
+			 */
+			inline Unknown &assign(::FLAC__StreamMetadata *object, bool copy) { Prototype::assign_object(object, copy); return *this; }
+
+			//@{
+			/** Check for equality, performing a deep compare by following pointers. */
+			inline bool operator==(const Unknown &object) const { return Prototype::operator==(object); }
+			inline bool operator==(const ::FLAC__StreamMetadata &object) const { return Prototype::operator==(object); }
+			inline bool operator==(const ::FLAC__StreamMetadata *object) const { return Prototype::operator==(object); }
+			//@}
+
+			//@{
+			/** Check for inequality, performing a deep compare by following pointers. */
+			inline bool operator!=(const Unknown &object) const { return Prototype::operator!=(object); }
+			inline bool operator!=(const ::FLAC__StreamMetadata &object) const { return Prototype::operator!=(object); }
+			inline bool operator!=(const ::FLAC__StreamMetadata *object) const { return Prototype::operator!=(object); }
+			//@}
+
+			const FLAC__byte *get_data() const;
+
+			//! This form always copies \a data
+			bool set_data(const FLAC__byte *data, unsigned length);
+			bool set_data(FLAC__byte *data, unsigned length, bool copy);
+		};
+
+		/* \} */
+
+
+		/** \defgroup flacpp_metadata_level0 FLAC++/metadata.h: metadata level 0 interface
+		 *  \ingroup flacpp_metadata
+		 *
+		 *  \brief
+		 *  Level 0 metadata iterators.
+		 *
+		 *  See the \link flac_metadata_level0 C layer equivalent \endlink
+		 *  for more.
+		 *
+		 * \{
+		 */
+
+		FLACPP_API bool get_streaminfo(const char *filename, StreamInfo &streaminfo); ///< See FLAC__metadata_get_streaminfo().
+
+		FLACPP_API bool get_tags(const char *filename, VorbisComment *&tags); ///< See FLAC__metadata_get_tags().
+		FLACPP_API bool get_tags(const char *filename, VorbisComment &tags); ///< See FLAC__metadata_get_tags().
+
+		FLACPP_API bool get_cuesheet(const char *filename, CueSheet *&cuesheet); ///< See FLAC__metadata_get_cuesheet().
+		FLACPP_API bool get_cuesheet(const char *filename, CueSheet &cuesheet); ///< See FLAC__metadata_get_cuesheet().
+
+		FLACPP_API bool get_picture(const char *filename, Picture *&picture, ::FLAC__StreamMetadata_Picture_Type type, const char *mime_type, const FLAC__byte *description, unsigned max_width, unsigned max_height, unsigned max_depth, unsigned max_colors); ///< See FLAC__metadata_get_picture().
+		FLACPP_API bool get_picture(const char *filename, Picture &picture, ::FLAC__StreamMetadata_Picture_Type type, const char *mime_type, const FLAC__byte *description, unsigned max_width, unsigned max_height, unsigned max_depth, unsigned max_colors); ///< See FLAC__metadata_get_picture().
+
+		/* \} */
+
+
+		/** \defgroup flacpp_metadata_level1 FLAC++/metadata.h: metadata level 1 interface
+		 *  \ingroup flacpp_metadata
+		 *
+		 *  \brief
+		 *  Level 1 metadata iterator.
+		 *
+		 *  The flow through the iterator in the C++ layer is similar
+		 *  to the C layer:
+		 *    - Create a SimpleIterator instance
+		 *    - Check SimpleIterator::is_valid()
+		 *    - Call SimpleIterator::init() and check the return
+		 *    - Traverse and/or edit.  Edits are written to file
+		 *      immediately.
+		 *    - Destroy the SimpleIterator instance
+		 *
+		 *  The ownership of pointers in the C++ layer follows that in
+		 *  the C layer, i.e.
+		 *    - The objects returned by get_block() are yours to
+		 *      modify, but changes are not reflected in the FLAC file
+		 *      until you call set_block().  The objects are also
+		 *      yours to delete; they are not automatically deleted
+		 *      when passed to set_block() or insert_block_after().
+		 *
+		 *  See the \link flac_metadata_level1 C layer equivalent \endlink
+		 *  for more.
+		 *
+		 * \{
+		 */
+
+		/** This class is a wrapper around the FLAC__metadata_simple_iterator
+		 *  structures and methods; see the
+		 * \link flacpp_metadata_level1 usage guide \endlink and
+		 * ::FLAC__Metadata_SimpleIterator.
+		 */
+		class FLACPP_API SimpleIterator {
+		public:
+			/** This class is a wrapper around FLAC__Metadata_SimpleIteratorStatus.
+			 */
+			class FLACPP_API Status {
+			public:
+				inline Status(::FLAC__Metadata_SimpleIteratorStatus status): status_(status) { }
+				inline operator ::FLAC__Metadata_SimpleIteratorStatus() const { return status_; }
+				inline const char *as_cstring() const { return ::FLAC__Metadata_SimpleIteratorStatusString[status_]; }
+			protected:
+				::FLAC__Metadata_SimpleIteratorStatus status_;
+			};
+
+			SimpleIterator();
+			virtual ~SimpleIterator();
+
+			bool is_valid() const; ///< Returns \c true iff object was properly constructed.
+
+			bool init(const char *filename, bool read_only, bool preserve_file_stats); ///< See FLAC__metadata_simple_iterator_init().
+
+			Status status();                                                    ///< See FLAC__metadata_simple_iterator_status().
+			bool is_writable() const;                                           ///< See FLAC__metadata_simple_iterator_is_writable().
+
+			bool next();                                                        ///< See FLAC__metadata_simple_iterator_next().
+			bool prev();                                                        ///< See FLAC__metadata_simple_iterator_prev().
+			bool is_last() const;                                               ///< See FLAC__metadata_simple_iterator_is_last().
+
+			off_t get_block_offset() const;                                     ///< See FLAC__metadata_simple_iterator_get_block_offset().
+			::FLAC__MetadataType get_block_type() const;                        ///< See FLAC__metadata_simple_iterator_get_block_type().
+			unsigned get_block_length() const;                                  ///< See FLAC__metadata_simple_iterator_get_block_length().
+			bool get_application_id(FLAC__byte *id);                            ///< See FLAC__metadata_simple_iterator_get_application_id().
+			Prototype *get_block();                                             ///< See FLAC__metadata_simple_iterator_get_block().
+			bool set_block(Prototype *block, bool use_padding = true);          ///< See FLAC__metadata_simple_iterator_set_block().
+			bool insert_block_after(Prototype *block, bool use_padding = true); ///< See FLAC__metadata_simple_iterator_insert_block_after().
+			bool delete_block(bool use_padding = true);                         ///< See FLAC__metadata_simple_iterator_delete_block().
+
+		protected:
+			::FLAC__Metadata_SimpleIterator *iterator_;
+			void clear();
+		};
+
+		/* \} */
+
+
+		/** \defgroup flacpp_metadata_level2 FLAC++/metadata.h: metadata level 2 interface
+		 *  \ingroup flacpp_metadata
+		 *
+		 *  \brief
+		 *  Level 2 metadata iterator.
+		 *
+		 *  The flow through the iterator in the C++ layer is similar
+		 *  to the C layer:
+		 *    - Create a Chain instance
+		 *    - Check Chain::is_valid()
+		 *    - Call Chain::read() and check the return
+		 *    - Traverse and/or edit with an Iterator or with
+		 *      Chain::merge_padding() or Chain::sort_padding()
+		 *    - Write changes back to FLAC file with Chain::write()
+		 *    - Destroy the Chain instance
+		 *
+		 *  The ownership of pointers in the C++ layer is slightly
+		 *  different than in the C layer, i.e.
+		 *    - The objects returned by Iterator::get_block() are NOT
+		 *      owned by the iterator and should be deleted by the
+		 *      caller when finished, BUT, when you modify the block,
+		 *      it will directly edit what's in the chain and you do
+		 *      not need to call Iterator::set_block().  However the
+		 *      changes will not be reflected in the FLAC file until
+		 *      the chain is written with Chain::write().
+		 *    - When you pass an object to Iterator::set_block(),
+		 *      Iterator::insert_block_before(), or
+		 *      Iterator::insert_block_after(), the iterator takes
+		 *      ownership of the block and it will be deleted by the
+		 *      chain.
+		 *
+		 *  See the \link flac_metadata_level2 C layer equivalent \endlink
+		 *  for more.
+		 *
+		 * \{
+		 */
+
+		/** This class is a wrapper around the FLAC__metadata_chain
+		 *  structures and methods; see the
+		 * \link flacpp_metadata_level2 usage guide \endlink and
+		 * ::FLAC__Metadata_Chain.
+		 */
+		class FLACPP_API Chain {
+		public:
+			/** This class is a wrapper around FLAC__Metadata_ChainStatus.
+			 */
+			class FLACPP_API Status {
+			public:
+				inline Status(::FLAC__Metadata_ChainStatus status): status_(status) { }
+				inline operator ::FLAC__Metadata_ChainStatus() const { return status_; }
+				inline const char *as_cstring() const { return ::FLAC__Metadata_ChainStatusString[status_]; }
+			protected:
+				::FLAC__Metadata_ChainStatus status_;
+			};
+
+			Chain();
+			virtual ~Chain();
+
+			friend class Iterator;
+
+			bool is_valid() const; ///< Returns \c true iff object was properly constructed.
+
+			Status status();                                                ///< See FLAC__metadata_chain_status().
+
+			bool read(const char *filename, bool is_ogg = false);                                ///< See FLAC__metadata_chain_read(), FLAC__metadata_chain_read_ogg().
+			bool read(FLAC__IOHandle handle, FLAC__IOCallbacks callbacks, bool is_ogg = false);  ///< See FLAC__metadata_chain_read_with_callbacks(), FLAC__metadata_chain_read_ogg_with_callbacks().
+
+			bool check_if_tempfile_needed(bool use_padding);                ///< See FLAC__metadata_chain_check_if_tempfile_needed().
+
+			bool write(bool use_padding = true, bool preserve_file_stats = false); ///< See FLAC__metadata_chain_write().
+			bool write(bool use_padding, ::FLAC__IOHandle handle, ::FLAC__IOCallbacks callbacks); ///< See FLAC__metadata_chain_write_with_callbacks().
+			bool write(bool use_padding, ::FLAC__IOHandle handle, ::FLAC__IOCallbacks callbacks, ::FLAC__IOHandle temp_handle, ::FLAC__IOCallbacks temp_callbacks); ///< See FLAC__metadata_chain_write_with_callbacks_and_tempfile().
+
+			void merge_padding();                                           ///< See FLAC__metadata_chain_merge_padding().
+			void sort_padding();                                            ///< See FLAC__metadata_chain_sort_padding().
+
+		protected:
+			::FLAC__Metadata_Chain *chain_;
+			virtual void clear();
+		};
+
+		/** This class is a wrapper around the FLAC__metadata_iterator
+		 *  structures and methods; see the
+		 * \link flacpp_metadata_level2 usage guide \endlink and
+		 * ::FLAC__Metadata_Iterator.
+		 */
+		class FLACPP_API Iterator {
+		public:
+			Iterator();
+			virtual ~Iterator();
+
+			bool is_valid() const; ///< Returns \c true iff object was properly constructed.
+
+
+			void init(Chain &chain);                       ///< See FLAC__metadata_iterator_init().
+
+			bool next();                                   ///< See FLAC__metadata_iterator_next().
+			bool prev();                                   ///< See FLAC__metadata_iterator_prev().
+
+			::FLAC__MetadataType get_block_type() const;   ///< See FLAC__metadata_iterator_get_block_type().
+			Prototype *get_block();                        ///< See FLAC__metadata_iterator_get_block().
+			bool set_block(Prototype *block);              ///< See FLAC__metadata_iterator_set_block().
+			bool delete_block(bool replace_with_padding);  ///< See FLAC__metadata_iterator_delete_block().
+			bool insert_block_before(Prototype *block);    ///< See FLAC__metadata_iterator_insert_block_before().
+			bool insert_block_after(Prototype *block);     ///< See FLAC__metadata_iterator_insert_block_after().
+
+		protected:
+			::FLAC__Metadata_Iterator *iterator_;
+			virtual void clear();
+		};
+
+		/* \} */
+
+	}
+}
+
+#endif