metadata.h

这是著名的TCPMP播放器在WINDWOWS,和WINCE下编译通过的源程序.笔者对其中的LIBMAD库做了针对ARM MPU的优化. 并增加了词幕功能.

				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;
		};

		/** 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.
		 */
		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.
		 *
		 * \{
		 */

	 	//! See FLAC__metadata_get_streaminfo().
		FLACPP_API bool get_streaminfo(const char *filename, StreamInfo &streaminfo);

	 	//! See FLAC__metadata_get_tags().
		FLACPP_API bool get_tags(const char *filename, VorbisComment *&tags);
		FLACPP_API bool get_tags(const char *filename, VorbisComment &tags);

		/* \} */


		/** \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 ::FLAC__Metadata_SimpleIterator.
		 */
		class FLACPP_API SimpleIterator {
		public:
			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 init(const char *filename, bool read_only, bool preserve_file_stats);

			bool is_valid() const;
			Status status();
			bool is_writable() const;

			bool next();
			bool prev();

			::FLAC__MetadataType get_block_type() const;
			Prototype *get_block();
			bool set_block(Prototype *block, bool use_padding = true);
			bool insert_block_after(Prototype *block, bool use_padding = true);
			bool delete_block(bool use_padding = true);

		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 ::FLAC__Metadata_Chain.
		 */
		class FLACPP_API Chain {
		public:
			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;
			Status status();

			bool read(const char *filename);
			bool read(FLAC__IOHandle handle, FLAC__IOCallbacks callbacks);

			bool check_if_tempfile_needed(bool use_padding);

			bool write(bool use_padding = true, bool preserve_file_stats = false);
			bool write(bool use_padding, ::FLAC__IOHandle handle, ::FLAC__IOCallbacks callbacks);
			bool write(bool use_padding, ::FLAC__IOHandle handle, ::FLAC__IOCallbacks callbacks, ::FLAC__IOHandle temp_handle, ::FLAC__IOCallbacks temp_callbacks);

			void merge_padding();
			void sort_padding();

		protected:
			::FLAC__Metadata_Chain *chain_;
			virtual void clear();
		};

		/** This class is a wrapper around the FLAC__metadata_iterator
		 *  structures and methods; see ::FLAC__Metadata_Iterator.
		 */
		class FLACPP_API Iterator {
		public:
			Iterator();
			virtual ~Iterator();

			bool is_valid() const;

			void init(Chain &chain);

			bool next();
			bool prev();

			::FLAC__MetadataType get_block_type() const;
			Prototype *get_block();
			bool set_block(Prototype *block);
			bool delete_block(bool replace_with_padding);
			bool insert_block_before(Prototype *block);
			bool insert_block_after(Prototype *block);

		protected:
			::FLAC__Metadata_Iterator *iterator_;
			virtual void clear();
		};

		/* \} */

	}
}

#endif