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big fix to allow codec and metadata interface to handle unknown metadata block types correctly

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This commit is contained in:
Josh Coalson 2003-01-10 05:29:17 +00:00
parent 315daa9e17
commit 0eea34aad0
3 changed files with 67 additions and 1 deletions
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53
include/FLAC++/metadata.h
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@ -693,6 +693,59 @@ namespace FLAC {
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 void operator=(const Unknown &object) { Prototype::operator=(object); }
inline void operator=(const ::FLAC__StreamMetadata &object) { Prototype::operator=(object); }
inline void operator=(const ::FLAC__StreamMetadata *object) { Prototype::operator=(object); }
//@}
//@{
/** 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);
};
/* \} */

11
include/FLAC/format.h
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@ -670,12 +670,20 @@ extern FLAC_API const unsigned FLAC__STREAM_METADATA_CUESHEET_RESERVED_LEN; /**<
extern FLAC_API const unsigned FLAC__STREAM_METADATA_CUESHEET_NUM_TRACKS_LEN; /**< == 8 (bits) */
/** Structure that is used when a metadata block of unknown type is loaded. The contents are opaque.
*/
typedef struct {
FLAC__byte *data;
} FLAC__StreamMetadata_Unknown;
/** FLAC metadata block structure. (c.f. <A HREF="../format.html#metadata_block">format specification</A>)
*/
typedef struct {
FLAC__MetadataType type;
/**< The type of the metadata block; used determine which member of the
* \a data union to dereference. */
* \a data union to dereference. If type >= FLAC__METADATA_TYPE_UNDEFINED
* then \a data.unknown must be used. */
FLAC__bool is_last;
/**< \c true if this metadata block is the last, else \a false */
@ -690,6 +698,7 @@ typedef struct {
FLAC__StreamMetadata_SeekTable seek_table;
FLAC__StreamMetadata_VorbisComment vorbis_comment;
FLAC__StreamMetadata_CueSheet cue_sheet;
FLAC__StreamMetadata_Unknown unknown;
} data;
/**< Polymorphic block data; use the \a type value to determine which
* to use. */

4
include/FLAC/metadata.h
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@ -907,6 +907,10 @@ FLAC_API FLAC__bool FLAC__metadata_iterator_insert_block_after(FLAC__Metadata_It
* with the exception of FLAC__METADATA_TYPE_VORBIS_COMMENT, which will have
* the vendor string set (but zero comments).
*
* Do not pass in a value greater than or equal to
* \a FLAC__METADATA_TYPE_UNDEFINED unless you really know what you're
* doing.
*
* \param type Type of object to create
* \retval FLAC__StreamMetadata*
* \c NULL if there was an error allocating memory, else the new instance.