AuroraMiddleware/flac
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity
4dc3507090
flac/include/FLAC++/metadata.h
Josh Coalson 4dc3507090 more doxygen docs
2002-08-20 03:56:52 +00:00

771 lines
27 KiB
C++
Raw Blame History

/* libFLAC++ - Free Lossless Audio Codec library
* Copyright (C) 2002 Josh Coalson
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#ifndef FLACPP__METADATA_H
#define FLACPP__METADATA_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.
*/
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.
*/
class 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. */
void operator=(const Prototype &);
void operator=(const ::FLAC__StreamMetadata &);
void operator=(const ::FLAC__StreamMetadata *);
//@}
/** 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);
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; }
};
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); }
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_; }
/** Create a deep copy of an object and return it. */
Prototype *clone(const Prototype *);
/** STREAMINFO metadata block.
* See <A HREF="../format.html#metadata_block_streaminfo">format specification</A>.
*/
class 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 void operator=(const StreamInfo &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 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 <A HREF="../format.html#metadata_block_padding">format specification</A>.
*/
class 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 void operator=(const Padding &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 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 <A HREF="../format.html#metadata_block_application">format specification</A>.
*/
class 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 void operator=(const Application &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 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 <A HREF="../format.html#metadata_block_seektable">format specification</A>.
*/
class 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 void operator=(const SeekTable &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 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 <A HREF="../format.html#metadata_block_vorbis_comment">format specification</A>.
*/
class 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; the string is not null-
* terminated and a length field is required since the
* string may contain embedded nulls.
*
* 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 null-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 nulls and so a \a field_value_length
* is requires to describe it.
*
* Always check is_valid() after the constructor or operator=
* to make sure memory was properly allocated.
*/
class Entry {
public:
Entry();
Entry(const char *field, unsigned field_length);
Entry(const char *field_name, const char *field_value, unsigned field_value_length);
Entry(const Entry &entry);
void operator=(const Entry &entry);
virtual ~Entry();
virtual bool is_valid() const;
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_name(const char *field_name);
bool set_field_value(const char *field_value, unsigned field_value_length);
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_name, const char *field_value, unsigned field_value_length);
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 void operator=(const VorbisComment &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 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;
Entry get_vendor_string() const; // only the Entry's field name should be used
Entry get_comment(unsigned index) const;
//! See FLAC__metadata_object_vorbis_comment_set_vendor_string()
//! \note Only the Entry's field name will be used.
bool set_vendor_string(const Entry &entry); // only the Entry's field name will be used
//! See FLAC__metadata_object_vorbis_comment_set_comment()
bool set_comment(unsigned index, const Entry &entry);
//! See FLAC__metadata_object_vorbis_comment_insert_comment()
bool insert_comment(unsigned index, const Entry &entry);
//! See FLAC__metadata_object_vorbis_comment_delete_comment()
bool delete_comment(unsigned index);
};
/* \} */
/** \defgroup flacpp_metadata_level0 FLAC++/metadata.h: metadata level 0 interface
* \ingroup flacpp_metadata
*
* \brief
* Level 0 metadata iterator.
*
* See the \link flac_metadata_level0 C layer equivalent \endlink
* for more.
*
* \{
*/
//! See FLAC__metadata_get_streaminfo().
bool get_streaminfo(const char *filename, StreamInfo &streaminfo);
/* \} */
/** \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.
*
* \{
*/
/** XXX class SimpleIterator
*/
class SimpleIterator {
public:
/** XXX class SimpleIterator::Status
*/
class 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 preserve_file_stats = false);
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 follows that in
* the C layer, i.e.
* - The objects returned by Iterator::get_block() are
* owned by the iterator and should not be deleted.
* When you modify the block, you are directly editing
* what's in the chain and 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 with the
* chain.
*
* See the \link flac_metadata_level2 C layer equivalent \endlink
* for more.
*
* \{
*/
/** XXX class Chain
*/
class Chain {
public:
/** XXX class Chain::Status
*/
class 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 write(bool use_padding = true, bool preserve_file_stats = false);
void merge_padding();
void sort_padding();
protected:
::FLAC__Metadata_Chain *chain_;
virtual void clear();
};
/** XXX class Iterator
*/
class 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
Reference in New Issue View Git Blame Copy Permalink