aa97e4d498
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@5983 a1c6a512-1295-4272-9138-f99709370657
1858 lines
82 KiB
C
1858 lines
82 KiB
C
/* libFLAC - Free Lossless Audio Codec library
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* Copyright (C) 2001,2002,2003,2004,2005 Josh Coalson
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* - Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* - Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* - Neither the name of the Xiph.org Foundation nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef FLAC__METADATA_H
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#define FLAC__METADATA_H
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#include "export.h"
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#include "callback.h"
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#include "format.h"
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/******************************************************************************
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(For an example of how all these routines are used, see the source
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code for the unit tests in src/test_libFLAC/metadata_*.c, or metaflac
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in src/metaflac/)
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******************************************************************************/
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/** \file include/FLAC/metadata.h
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*
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* \brief
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* This module provides functions for creating and manipulating FLAC
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* metadata blocks in memory, and three progressively more powerful
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* interfaces for traversing and editing metadata in FLAC files.
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*
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* See the detailed documentation for each interface in the
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* \link flac_metadata metadata \endlink module.
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*/
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/** \defgroup flac_metadata FLAC/metadata.h: metadata interfaces
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* \ingroup flac
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*
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* \brief
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* This module provides functions for creating and manipulating FLAC
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* metadata blocks in memory, and three progressively more powerful
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* interfaces for traversing and editing metadata in FLAC files.
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*
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* There are three metadata interfaces of increasing complexity:
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*
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* Level 0:
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* Read-only access to the STREAMINFO and VORBIS_COMMENT blocks.
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*
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* Level 1:
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* Read-write access to all metadata blocks. This level is write-
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* efficient in most cases (more on this below), and uses less memory
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* than level 2.
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*
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* Level 2:
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* Read-write access to all metadata blocks. This level is write-
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* efficient in all cases, but uses more memory since all metadata for
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* the whole file is read into memory and manipulated before writing
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* out again.
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*
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* What do we mean by efficient? Since FLAC metadata appears at the
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* beginning of the file, when writing metadata back to a FLAC file
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* it is possible to grow or shrink the metadata such that the entire
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* file must be rewritten. However, if the size remains the same during
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* changes or PADDING blocks are utilized, only the metadata needs to be
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* overwritten, which is much faster.
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*
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* Efficient means the whole file is rewritten at most one time, and only
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* when necessary. Level 1 is not efficient only in the case that you
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* cause more than one metadata block to grow or shrink beyond what can
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* be accomodated by padding. In this case you should probably use level
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* 2, which allows you to edit all the metadata for a file in memory and
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* write it out all at once.
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*
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* All levels know how to skip over and not disturb an ID3v2 tag at the
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* front of the file.
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*
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* All levels access files via their filenames. In addition, level 2
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* has additional alternative read and write functions that take an I/O
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* handle and callbacks, for times when access by filename is not possible.
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*
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* In addition to the three interfaces, this module defines functions for
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* creating and manipulating various metadata objects in memory. As we see
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* from the Format module, FLAC metadata blocks in memory are very primitive
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* structures for storing information in an efficient way. Reading
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* information from the structures is easy but creating or modifying them
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* directly is more complex. The metadata object routines here facilitate
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* this by taking care of the consistency and memory management drudgery.
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*
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* Unless you will be using the level 1 or 2 interfaces to modify existing
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* metadata however, you will not probably not need these.
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*
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* From a dependency standpoint, none of the encoders or decoders require
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* the metadata module. This is so that embedded users can strip out the
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* metadata module from libFLAC to reduce the size and complexity.
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*/
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#ifdef __cplusplus
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extern "C" {
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#endif
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/** \defgroup flac_metadata_level0 FLAC/metadata.h: metadata level 0 interface
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* \ingroup flac_metadata
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*
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* \brief
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* The level 0 interface consists of individual routines to read the
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* STREAMINFO and VORBIS_COMMENT blocks, requiring only a filename.
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*
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* It skips any ID3v2 tag at the head of the file.
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*
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* \{
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*/
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/** Read the STREAMINFO metadata block of the given FLAC file. This function
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* will skip any ID3v2 tag at the head of the file.
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*
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* \param filename The path to the FLAC file to read.
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* \param streaminfo A pointer to space for the STREAMINFO block. Since
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* FLAC__StreamMetadata is a simple structure with no
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* memory allocation involved, you pass the address of
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* an existing structure. It need not be initialized.
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* \assert
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* \code filename != NULL \endcode
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* \code streaminfo != NULL \endcode
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* \retval FLAC__bool
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* \c true if a valid STREAMINFO block was read from \a filename. Returns
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* \c false if there was a memory allocation error, a file decoder error,
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* or the file contained no STREAMINFO block. (A memory allocation error
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* is possible because this function must set up a file decoder.)
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*/
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FLAC_API FLAC__bool FLAC__metadata_get_streaminfo(const char *filename, FLAC__StreamMetadata *streaminfo);
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/** Read the VORBIS_COMMENT metadata block of the given FLAC file. This
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* function will skip any ID3v2 tag at the head of the file.
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*
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* \param filename The path to the FLAC file to read.
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* \param tags The address where the returned pointer will be
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* stored. The \a tags object must be deleted by
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* the caller using FLAC__metadata_object_delete().
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* \assert
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* \code filename != NULL \endcode
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* \code streaminfo != NULL \endcode
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* \retval FLAC__bool
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* \c true if a valid VORBIS_COMMENT block was read from \a filename,
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* and \a *tags will be set to the address of the tag structure.
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* Returns \c false if there was a memory allocation error, a file
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* decoder error, or the file contained no VORBIS_COMMENT block, and
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* \a *tags will be set to \c NULL.
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*/
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FLAC_API FLAC__bool FLAC__metadata_get_tags(const char *filename, FLAC__StreamMetadata **tags);
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/* \} */
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/** \defgroup flac_metadata_level1 FLAC/metadata.h: metadata level 1 interface
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* \ingroup flac_metadata
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*
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* \brief
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* The level 1 interface provides read-write access to FLAC file metadata and
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* operates directly on the FLAC file.
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*
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* The general usage of this interface is:
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*
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* - Create an iterator using FLAC__metadata_simple_iterator_new()
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* - Attach it to a file using FLAC__metadata_simple_iterator_init() and check
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* the exit code. Call FLAC__metadata_simple_iterator_is_writable() to
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* see if the file is writable, or read-only access is allowed.
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* - Use FLAC__metadata_simple_iterator_next() and
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* FLAC__metadata_simple_iterator_prev() to move around the blocks.
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* This is does not read the actual blocks themselves.
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* FLAC__metadata_simple_iterator_next() is relatively fast.
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* FLAC__metadata_simple_iterator_prev() is slower since it needs to search
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* forward from the front of the file.
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* - Use FLAC__metadata_simple_iterator_get_block_type() or
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* FLAC__metadata_simple_iterator_get_block() to access the actual data at
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* the current iterator position. The returned object is yours to modify
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* and free.
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* - Use FLAC__metadata_simple_iterator_set_block() to write a modified block
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* back. You must have write permission to the original file. Make sure to
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* read the whole comment to FLAC__metadata_simple_iterator_set_block()
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* below.
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* - Use FLAC__metadata_simple_iterator_insert_block_after() to add new blocks.
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* Use the object creation functions from
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* \link flac_metadata_object here \endlink to generate new objects.
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* - Use FLAC__metadata_simple_iterator_delete_block() to remove the block
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* currently referred to by the iterator, or replace it with padding.
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* - Destroy the iterator with FLAC__metadata_simple_iterator_delete() when
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* finished.
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*
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* \note
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* The FLAC file remains open the whole time between
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* FLAC__metadata_simple_iterator_init() and
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* FLAC__metadata_simple_iterator_delete(), so make sure you are not altering
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* the file during this time.
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*
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* \note
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* Do not modify the \a is_last, \a length, or \a type fields of returned
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* FLAC__StreamMetadata objects. These are managed automatically.
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*
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* \note
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* If any of the modification functions
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* (FLAC__metadata_simple_iterator_set_block(),
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* FLAC__metadata_simple_iterator_delete_block(),
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* FLAC__metadata_simple_iterator_insert_block_after(), etc.) return \c false,
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* you should delete the iterator as it may no longer be valid.
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*
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* \{
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*/
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struct FLAC__Metadata_SimpleIterator;
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/** The opaque structure definition for the level 1 iterator type.
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* See the
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* \link flac_metadata_level1 metadata level 1 module \endlink
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* for a detailed description.
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*/
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typedef struct FLAC__Metadata_SimpleIterator FLAC__Metadata_SimpleIterator;
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/** Status type for FLAC__Metadata_SimpleIterator.
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*
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* The iterator's current status can be obtained by calling FLAC__metadata_simple_iterator_status().
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*/
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typedef enum {
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FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK = 0,
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/**< The iterator is in the normal OK state */
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FLAC__METADATA_SIMPLE_ITERATOR_STATUS_ILLEGAL_INPUT,
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/**< The data passed into a function violated the function's usage criteria */
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FLAC__METADATA_SIMPLE_ITERATOR_STATUS_ERROR_OPENING_FILE,
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/**< The iterator could not open the target file */
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FLAC__METADATA_SIMPLE_ITERATOR_STATUS_NOT_A_FLAC_FILE,
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/**< The iterator could not find the FLAC signature at the start of the file */
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FLAC__METADATA_SIMPLE_ITERATOR_STATUS_NOT_WRITABLE,
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/**< The iterator tried to write to a file that was not writable */
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FLAC__METADATA_SIMPLE_ITERATOR_STATUS_BAD_METADATA,
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/**< The iterator encountered input that does not conform to the FLAC metadata specification */
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FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR,
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/**< The iterator encountered an error while reading the FLAC file */
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FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR,
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/**< The iterator encountered an error while seeking in the FLAC file */
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FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR,
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/**< The iterator encountered an error while writing the FLAC file */
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FLAC__METADATA_SIMPLE_ITERATOR_STATUS_RENAME_ERROR,
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/**< The iterator encountered an error renaming the FLAC file */
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FLAC__METADATA_SIMPLE_ITERATOR_STATUS_UNLINK_ERROR,
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/**< The iterator encountered an error removing the temporary file */
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FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR,
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/**< Memory allocation failed */
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FLAC__METADATA_SIMPLE_ITERATOR_STATUS_INTERNAL_ERROR
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/**< The caller violated an assertion or an unexpected error occurred */
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} FLAC__Metadata_SimpleIteratorStatus;
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/** Maps a FLAC__Metadata_SimpleIteratorStatus to a C string.
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*
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* Using a FLAC__Metadata_SimpleIteratorStatus as the index to this array
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* will give the string equivalent. The contents should not be modified.
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*/
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extern FLAC_API const char * const FLAC__Metadata_SimpleIteratorStatusString[];
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/** Create a new iterator instance.
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*
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* \retval FLAC__Metadata_SimpleIterator*
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* \c NULL if there was an error allocating memory, else the new instance.
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*/
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FLAC_API FLAC__Metadata_SimpleIterator *FLAC__metadata_simple_iterator_new();
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/** Free an iterator instance. Deletes the object pointed to by \a iterator.
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*
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* \param iterator A pointer to an existing iterator.
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* \assert
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* \code iterator != NULL \endcode
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*/
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FLAC_API void FLAC__metadata_simple_iterator_delete(FLAC__Metadata_SimpleIterator *iterator);
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/** Get the current status of the iterator. Call this after a function
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* returns \c false to get the reason for the error. Also resets the status
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* to FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK.
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*
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* \param iterator A pointer to an existing iterator.
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* \assert
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* \code iterator != NULL \endcode
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* \retval FLAC__Metadata_SimpleIteratorStatus
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* The current status of the iterator.
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*/
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FLAC_API FLAC__Metadata_SimpleIteratorStatus FLAC__metadata_simple_iterator_status(FLAC__Metadata_SimpleIterator *iterator);
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/** Initialize the iterator to point to the first metadata block in the
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* given FLAC file.
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*
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* \param iterator A pointer to an existing iterator.
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* \param filename The path to the FLAC file.
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* \param read_only If \c true, the FLAC file will be opened
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* in read-only mode; if \c false, the FLAC
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* file will be opened for edit even if no
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* edits are performed.
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* \param preserve_file_stats If \c true, the owner and modification
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* time will be preserved even if the FLAC
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* file is written to.
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* \assert
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* \code iterator != NULL \endcode
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* \code filename != NULL \endcode
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* \retval FLAC__bool
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* \c false if a memory allocation error occurs, the file can't be
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* opened, or another error occurs, else \c true.
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*/
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FLAC_API FLAC__bool FLAC__metadata_simple_iterator_init(FLAC__Metadata_SimpleIterator *iterator, const char *filename, FLAC__bool read_only, FLAC__bool preserve_file_stats);
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/** Returns \c true if the FLAC file is writable. If \c false, calls to
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* FLAC__metadata_simple_iterator_set_block() and
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* FLAC__metadata_simple_iterator_insert_block_after() will fail.
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*
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* \param iterator A pointer to an existing iterator.
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* \assert
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* \code iterator != NULL \endcode
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* \retval FLAC__bool
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* See above.
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*/
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FLAC_API FLAC__bool FLAC__metadata_simple_iterator_is_writable(const FLAC__Metadata_SimpleIterator *iterator);
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/** Moves the iterator forward one metadata block, returning \c false if
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* already at the end.
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*
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* \param iterator A pointer to an existing initialized iterator.
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* \assert
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* \code iterator != NULL \endcode
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* \a iterator has been successfully initialized with
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* FLAC__metadata_simple_iterator_init()
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* \retval FLAC__bool
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* \c false if already at the last metadata block of the chain, else
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* \c true.
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*/
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FLAC_API FLAC__bool FLAC__metadata_simple_iterator_next(FLAC__Metadata_SimpleIterator *iterator);
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/** Moves the iterator backward one metadata block, returning \c false if
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* already at the beginning.
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*
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* \param iterator A pointer to an existing initialized iterator.
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* \assert
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* \code iterator != NULL \endcode
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* \a iterator has been successfully initialized with
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* FLAC__metadata_simple_iterator_init()
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* \retval FLAC__bool
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* \c false if already at the first metadata block of the chain, else
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* \c true.
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*/
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FLAC_API FLAC__bool FLAC__metadata_simple_iterator_prev(FLAC__Metadata_SimpleIterator *iterator);
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/** Get the type of the metadata block at the current position. This
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* avoids reading the actual block data which can save time for large
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* blocks.
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*
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* \param iterator A pointer to an existing initialized iterator.
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* \assert
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* \code iterator != NULL \endcode
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* \a iterator has been successfully initialized with
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* FLAC__metadata_simple_iterator_init()
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* \retval FLAC__MetadataType
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* The type of the metadata block at the current iterator position.
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*/
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FLAC_API FLAC__MetadataType FLAC__metadata_simple_iterator_get_block_type(const FLAC__Metadata_SimpleIterator *iterator);
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/** Get the metadata block at the current position. You can modify the
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* block but must use FLAC__metadata_simple_iterator_set_block() to
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* write it back to the FLAC file.
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*
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* You must call FLAC__metadata_object_delete() on the returned object
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* when you are finished with it.
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*
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* \param iterator A pointer to an existing initialized iterator.
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* \assert
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* \code iterator != NULL \endcode
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* \a iterator has been successfully initialized with
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* FLAC__metadata_simple_iterator_init()
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* \retval FLAC__StreamMetadata*
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* The current metadata block.
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*/
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FLAC_API FLAC__StreamMetadata *FLAC__metadata_simple_iterator_get_block(FLAC__Metadata_SimpleIterator *iterator);
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/** Write a block back to the FLAC file. This function tries to be
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* as efficient as possible; how the block is actually written is
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* shown by the following:
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*
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* Existing block is a STREAMINFO block and the new block is a
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* STREAMINFO block: the new block is written in place. Make sure
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* you know what you're doing when changing the values of a
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* STREAMINFO block.
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*
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* Existing block is a STREAMINFO block and the new block is a
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* not a STREAMINFO block: this is an error since the first block
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* must be a STREAMINFO block. Returns \c false without altering the
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* file.
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*
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* Existing block is not a STREAMINFO block and the new block is a
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* STREAMINFO block: this is an error since there may be only one
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* STREAMINFO block. Returns \c false without altering the file.
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*
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* Existing block and new block are the same length: the existing
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* block will be replaced by the new block, written in place.
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*
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* Existing block is longer than new block: if use_padding is \c true,
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* the existing block will be overwritten in place with the new
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* block followed by a PADDING block, if possible, to make the total
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* size the same as the existing block. Remember that a padding
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* block requires at least four bytes so if the difference in size
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* between the new block and existing block is less than that, the
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* entire file will have to be rewritten, using the new block's
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* exact size. If use_padding is \c false, the entire file will be
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* rewritten, replacing the existing block by the new block.
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*
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* Existing block is shorter than new block: if use_padding is \c true,
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* the function will try and expand the new block into the following
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* PADDING block, if it exists and doing so won't shrink the PADDING
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* block to less than 4 bytes. If there is no following PADDING
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* block, or it will shrink to less than 4 bytes, or use_padding is
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* \c false, the entire file is rewritten, replacing the existing block
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* with the new block. Note that in this case any following PADDING
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* block is preserved as is.
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*
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* After writing the block, the iterator will remain in the same
|
|
* place, i.e. pointing to the new block.
|
|
*
|
|
* \param iterator A pointer to an existing initialized iterator.
|
|
* \param block The block to set.
|
|
* \param use_padding See above.
|
|
* \assert
|
|
* \code iterator != NULL \endcode
|
|
* \a iterator has been successfully initialized with
|
|
* FLAC__metadata_simple_iterator_init()
|
|
* \code block != NULL \endcode
|
|
* \retval FLAC__bool
|
|
* \c true if successful, else \c false.
|
|
*/
|
|
FLAC_API FLAC__bool FLAC__metadata_simple_iterator_set_block(FLAC__Metadata_SimpleIterator *iterator, FLAC__StreamMetadata *block, FLAC__bool use_padding);
|
|
|
|
/** This is similar to FLAC__metadata_simple_iterator_set_block()
|
|
* except that instead of writing over an existing block, it appends
|
|
* a block after the existing block. \a use_padding is again used to
|
|
* tell the function to try an expand into following padding in an
|
|
* attempt to avoid rewriting the entire file.
|
|
*
|
|
* This function will fail and return \c false if given a STREAMINFO
|
|
* block.
|
|
*
|
|
* After writing the block, the iterator will be pointing to the
|
|
* new block.
|
|
*
|
|
* \param iterator A pointer to an existing initialized iterator.
|
|
* \param block The block to set.
|
|
* \param use_padding See above.
|
|
* \assert
|
|
* \code iterator != NULL \endcode
|
|
* \a iterator has been successfully initialized with
|
|
* FLAC__metadata_simple_iterator_init()
|
|
* \code block != NULL \endcode
|
|
* \retval FLAC__bool
|
|
* \c true if successful, else \c false.
|
|
*/
|
|
FLAC_API FLAC__bool FLAC__metadata_simple_iterator_insert_block_after(FLAC__Metadata_SimpleIterator *iterator, FLAC__StreamMetadata *block, FLAC__bool use_padding);
|
|
|
|
/** Deletes the block at the current position. This will cause the
|
|
* entire FLAC file to be rewritten, unless \a use_padding is \c true,
|
|
* in which case the block will be replaced by an equal-sized PADDING
|
|
* block. The iterator will be left pointing to the block before the
|
|
* one just deleted.
|
|
*
|
|
* You may not delete the STREAMINFO block.
|
|
*
|
|
* \param iterator A pointer to an existing initialized iterator.
|
|
* \param use_padding See above.
|
|
* \assert
|
|
* \code iterator != NULL \endcode
|
|
* \a iterator has been successfully initialized with
|
|
* FLAC__metadata_simple_iterator_init()
|
|
* \retval FLAC__bool
|
|
* \c true if successful, else \c false.
|
|
*/
|
|
FLAC_API FLAC__bool FLAC__metadata_simple_iterator_delete_block(FLAC__Metadata_SimpleIterator *iterator, FLAC__bool use_padding);
|
|
|
|
/* \} */
|
|
|
|
|
|
/** \defgroup flac_metadata_level2 FLAC/metadata.h: metadata level 2 interface
|
|
* \ingroup flac_metadata
|
|
*
|
|
* \brief
|
|
* The level 2 interface provides read-write access to FLAC file metadata;
|
|
* all metadata is read into memory, operated on in memory, and then written
|
|
* to file, which is more efficient than level 1 when editing multiple blocks.
|
|
*
|
|
* The general usage of this interface is:
|
|
*
|
|
* - Create a new chain using FLAC__metadata_chain_new(). A chain is a
|
|
* linked list of FLAC metadata blocks.
|
|
* - Read all metadata into the the chain from a FLAC file using
|
|
* FLAC__metadata_chain_read() and check the status.
|
|
* - Optionally, consolidate the padding using
|
|
* FLAC__metadata_chain_merge_padding() or
|
|
* FLAC__metadata_chain_sort_padding().
|
|
* - Create a new iterator using FLAC__metadata_iterator_new()
|
|
* - Initialize the iterator to point to the first element in the chain
|
|
* using FLAC__metadata_iterator_init()
|
|
* - Traverse the chain using FLAC__metadata_iterator_next and
|
|
* FLAC__metadata_iterator_prev().
|
|
* - Get a block for reading or modification using
|
|
* FLAC__metadata_iterator_get_block(). The pointer to the object
|
|
* inside the chain is returned, so the block is yours to modify.
|
|
* Changes will be reflected in the FLAC file when you write the
|
|
* chain. You can also add and delete blocks (see functions below).
|
|
* - When done, write out the chain using FLAC__metadata_chain_write().
|
|
* Make sure to read the whole comment to the function below.
|
|
* - Delete the chain using FLAC__metadata_chain_delete().
|
|
*
|
|
* \note
|
|
* Even though the FLAC file is not open while the chain is being
|
|
* manipulated, you must not alter the file externally during
|
|
* this time. The chain assumes the FLAC file will not change
|
|
* between the time of FLAC__metadata_chain_read() and
|
|
* FLAC__metadata_chain_write().
|
|
*
|
|
* \note
|
|
* Do not modify the is_last, length, or type fields of returned
|
|
* FLAC__StreamMetadata objects. These are managed automatically.
|
|
*
|
|
* \note
|
|
* The metadata objects returned by FLAC__metadata_iterator_get_block()
|
|
* are owned by the chain; do not FLAC__metadata_object_delete() them.
|
|
* In the same way, blocks passed to FLAC__metadata_iterator_set_block()
|
|
* become owned by the chain and they will be deleted when the chain is
|
|
* deleted.
|
|
*
|
|
* \{
|
|
*/
|
|
|
|
struct FLAC__Metadata_Chain;
|
|
/** The opaque structure definition for the level 2 chain type.
|
|
*/
|
|
typedef struct FLAC__Metadata_Chain FLAC__Metadata_Chain;
|
|
|
|
struct FLAC__Metadata_Iterator;
|
|
/** The opaque structure definition for the level 2 iterator type.
|
|
*/
|
|
typedef struct FLAC__Metadata_Iterator FLAC__Metadata_Iterator;
|
|
|
|
typedef enum {
|
|
FLAC__METADATA_CHAIN_STATUS_OK = 0,
|
|
/**< The chain is in the normal OK state */
|
|
|
|
FLAC__METADATA_CHAIN_STATUS_ILLEGAL_INPUT,
|
|
/**< The data passed into a function violated the function's usage criteria */
|
|
|
|
FLAC__METADATA_CHAIN_STATUS_ERROR_OPENING_FILE,
|
|
/**< The chain could not open the target file */
|
|
|
|
FLAC__METADATA_CHAIN_STATUS_NOT_A_FLAC_FILE,
|
|
/**< The chain could not find the FLAC signature at the start of the file */
|
|
|
|
FLAC__METADATA_CHAIN_STATUS_NOT_WRITABLE,
|
|
/**< The chain tried to write to a file that was not writable */
|
|
|
|
FLAC__METADATA_CHAIN_STATUS_BAD_METADATA,
|
|
/**< The chain encountered input that does not conform to the FLAC metadata specification */
|
|
|
|
FLAC__METADATA_CHAIN_STATUS_READ_ERROR,
|
|
/**< The chain encountered an error while reading the FLAC file */
|
|
|
|
FLAC__METADATA_CHAIN_STATUS_SEEK_ERROR,
|
|
/**< The chain encountered an error while seeking in the FLAC file */
|
|
|
|
FLAC__METADATA_CHAIN_STATUS_WRITE_ERROR,
|
|
/**< The chain encountered an error while writing the FLAC file */
|
|
|
|
FLAC__METADATA_CHAIN_STATUS_RENAME_ERROR,
|
|
/**< The chain encountered an error renaming the FLAC file */
|
|
|
|
FLAC__METADATA_CHAIN_STATUS_UNLINK_ERROR,
|
|
/**< The chain encountered an error removing the temporary file */
|
|
|
|
FLAC__METADATA_CHAIN_STATUS_MEMORY_ALLOCATION_ERROR,
|
|
/**< Memory allocation failed */
|
|
|
|
FLAC__METADATA_CHAIN_STATUS_INTERNAL_ERROR,
|
|
/**< The caller violated an assertion or an unexpected error occurred */
|
|
|
|
FLAC__METADATA_CHAIN_STATUS_INVALID_CALLBACKS,
|
|
/**< One or more of the required callbacks was NULL */
|
|
|
|
FLAC__METADATA_CHAIN_STATUS_READ_WRITE_MISMATCH,
|
|
/**< FLAC__metadata_chain_write() was called on a chain read by
|
|
* FLAC__metadata_chain_read_with_callbacks(), or
|
|
* FLAC__metadata_chain_write_with_callbacks() or
|
|
* FLAC__metadata_chain_write_with_callbacks_and_tempfile() was
|
|
* called on a chain read by FLAC__metadata_chain_read(). Matching
|
|
* read/write methods must always be used. */
|
|
|
|
FLAC__METADATA_CHAIN_STATUS_WRONG_WRITE_CALL
|
|
/**< FLAC__metadata_chain_write_with_callbacks() was called when the
|
|
* chain write requires a tempfile; use
|
|
* FLAC__metadata_chain_write_with_callbacks_and_tempfile() instead.
|
|
* Or, FLAC__metadata_chain_write_with_callbacks_and_tempfile() was
|
|
* called when the chain write does not require a tempfile; use
|
|
* FLAC__metadata_chain_write_with_callbacks() instead.
|
|
* Always check FLAC__metadata_chain_check_if_tempfile_needed()
|
|
* before writing via callbacks. */
|
|
|
|
} FLAC__Metadata_ChainStatus;
|
|
|
|
/** Maps a FLAC__Metadata_ChainStatus to a C string.
|
|
*
|
|
* Using a FLAC__Metadata_ChainStatus as the index to this array
|
|
* will give the string equivalent. The contents should not be modified.
|
|
*/
|
|
extern FLAC_API const char * const FLAC__Metadata_ChainStatusString[];
|
|
|
|
/*********** FLAC__Metadata_Chain ***********/
|
|
|
|
/** Create a new chain instance.
|
|
*
|
|
* \retval FLAC__Metadata_Chain*
|
|
* \c NULL if there was an error allocating memory, else the new instance.
|
|
*/
|
|
FLAC_API FLAC__Metadata_Chain *FLAC__metadata_chain_new();
|
|
|
|
/** Free a chain instance. Deletes the object pointed to by \a chain.
|
|
*
|
|
* \param chain A pointer to an existing chain.
|
|
* \assert
|
|
* \code chain != NULL \endcode
|
|
*/
|
|
FLAC_API void FLAC__metadata_chain_delete(FLAC__Metadata_Chain *chain);
|
|
|
|
/** Get the current status of the chain. Call this after a function
|
|
* returns \c false to get the reason for the error. Also resets the
|
|
* status to FLAC__METADATA_CHAIN_STATUS_OK.
|
|
*
|
|
* \param chain A pointer to an existing chain.
|
|
* \assert
|
|
* \code chain != NULL \endcode
|
|
* \retval FLAC__Metadata_ChainStatus
|
|
* The current status of the chain.
|
|
*/
|
|
FLAC_API FLAC__Metadata_ChainStatus FLAC__metadata_chain_status(FLAC__Metadata_Chain *chain);
|
|
|
|
/** Read all metadata from a FLAC file into the chain.
|
|
*
|
|
* \param chain A pointer to an existing chain.
|
|
* \param filename The path to the FLAC file to read.
|
|
* \assert
|
|
* \code chain != NULL \endcode
|
|
* \code filename != NULL \endcode
|
|
* \retval FLAC__bool
|
|
* \c true if a valid list of metadata blocks was read from
|
|
* \a filename, else \c false. On failure, check the status with
|
|
* FLAC__metadata_chain_status().
|
|
*/
|
|
FLAC_API FLAC__bool FLAC__metadata_chain_read(FLAC__Metadata_Chain *chain, const char *filename);
|
|
|
|
/** Read all metadata from a FLAC stream into the chain via I/O callbacks.
|
|
*
|
|
* The \a handle need only be open for reading, but must be seekable.
|
|
* The equivalent minimum stdio fopen() file mode is \c "r" (or \c "rb"
|
|
* for Windows).
|
|
*
|
|
* \param chain A pointer to an existing chain.
|
|
* \param handle The I/O handle of the FLAC stream to read. The
|
|
* handle will NOT be closed after the metadata is read;
|
|
* that is the duty of the caller.
|
|
* \param callbacks
|
|
* A set of callbacks to use for I/O. The mandatory
|
|
* callbacks are \a read, \a seek, and \a tell.
|
|
* \assert
|
|
* \code chain != NULL \endcode
|
|
* \retval FLAC__bool
|
|
* \c true if a valid list of metadata blocks was read from
|
|
* \a handle, else \c false. On failure, check the status with
|
|
* FLAC__metadata_chain_status().
|
|
*/
|
|
FLAC_API FLAC__bool FLAC__metadata_chain_read_with_callbacks(FLAC__Metadata_Chain *chain, FLAC__IOHandle handle, FLAC__IOCallbacks callbacks);
|
|
|
|
/** Checks if writing the given chain would require the use of a
|
|
* temporary file, or if it could be written in place.
|
|
*
|
|
* Under certain conditions, padding can be utilized so that writing
|
|
* edited metadata back to the FLAC file does not require rewriting the
|
|
* entire file. If rewriting is required, then a temporary workfile is
|
|
* required. When writing metadata using callbacks, you must check
|
|
* this function to know whether to call
|
|
* FLAC__metadata_chain_write_with_callbacks() or
|
|
* FLAC__metadata_chain_write_with_callbacks_and_tempfile(). When
|
|
* writing with FLAC__metadata_chain_write(), the temporary file is
|
|
* handled internally.
|
|
*
|
|
* \param chain A pointer to an existing chain.
|
|
* \param use_padding
|
|
* Whether or not padding will be allowed to be used
|
|
* during the write. The value of \a use_padding given
|
|
* here must match the value later passed to
|
|
* FLAC__metadata_chain_write_with_callbacks() or
|
|
* FLAC__metadata_chain_write_with_callbacks_with_tempfile().
|
|
* \assert
|
|
* \code chain != NULL \endcode
|
|
* \retval FLAC__bool
|
|
* \c true if writing the current chain would require a tempfile, or
|
|
* \c false if metadata can be written in place.
|
|
*/
|
|
FLAC_API FLAC__bool FLAC__metadata_chain_check_if_tempfile_needed(FLAC__Metadata_Chain *chain, FLAC__bool use_padding);
|
|
|
|
/** Write all metadata out to the FLAC file. This function tries to be as
|
|
* efficient as possible; how the metadata is actually written is shown by
|
|
* the following:
|
|
*
|
|
* If the current chain is the same size as the existing metadata, the new
|
|
* data is written in place.
|
|
*
|
|
* If the current chain is longer than the existing metadata, and
|
|
* \a use_padding is \c true, and the last block is a PADDING block of
|
|
* sufficient length, the function will truncate the final padding block
|
|
* so that the overall size of the metadata is the same as the existing
|
|
* metadata, and then just rewrite the metadata. Otherwise, if not all of
|
|
* the above conditions are met, the entire FLAC file must be rewritten.
|
|
* If you want to use padding this way it is a good idea to call
|
|
* FLAC__metadata_chain_sort_padding() first so that you have the maximum
|
|
* amount of padding to work with, unless you need to preserve ordering
|
|
* of the PADDING blocks for some reason.
|
|
*
|
|
* If the current chain is shorter than the existing metadata, and
|
|
* \a use_padding is \c true, and the final block is a PADDING block, the padding
|
|
* is extended to make the overall size the same as the existing data. If
|
|
* \a use_padding is \c true and the last block is not a PADDING block, a new
|
|
* PADDING block is added to the end of the new data to make it the same
|
|
* size as the existing data (if possible, see the note to
|
|
* FLAC__metadata_simple_iterator_set_block() about the four byte limit)
|
|
* and the new data is written in place. If none of the above apply or
|
|
* \a use_padding is \c false, the entire FLAC file is rewritten.
|
|
*
|
|
* If \a preserve_file_stats is \c true, the owner and modification time will
|
|
* be preserved even if the FLAC file is written.
|
|
*
|
|
* For this write function to be used, the chain must have been read with
|
|
* FLAC__metadata_chain_read(), not FLAC__metadata_chain_read_with_callbacks().
|
|
*
|
|
* \param chain A pointer to an existing chain.
|
|
* \param use_padding See above.
|
|
* \param preserve_file_stats See above.
|
|
* \assert
|
|
* \code chain != NULL \endcode
|
|
* \retval FLAC__bool
|
|
* \c true if the write succeeded, else \c false. On failure,
|
|
* check the status with FLAC__metadata_chain_status().
|
|
*/
|
|
FLAC_API FLAC__bool FLAC__metadata_chain_write(FLAC__Metadata_Chain *chain, FLAC__bool use_padding, FLAC__bool preserve_file_stats);
|
|
|
|
/** Write all metadata out to a FLAC stream via callbacks.
|
|
*
|
|
* (See FLAC__metadata_chain_write() for the details on how padding is
|
|
* used to write metadata in place if possible.)
|
|
*
|
|
* The \a handle must be open for updating and be seekable. The
|
|
* equivalent minimum stdio fopen() file mode is \c "r+" (or \c "r+b"
|
|
* for Windows).
|
|
*
|
|
* For this write function to be used, the chain must have been read with
|
|
* FLAC__metadata_chain_read_with_callbacks(), not FLAC__metadata_chain_read().
|
|
* Also, FLAC__metadata_chain_check_if_tempfile_needed() must have returned
|
|
* \c false.
|
|
*
|
|
* \param chain A pointer to an existing chain.
|
|
* \param use_padding See FLAC__metadata_chain_write()
|
|
* \param handle The I/O handle of the FLAC stream to write. The
|
|
* handle will NOT be closed after the metadata is
|
|
* written; that is the duty of the caller.
|
|
* \param callbacks A set of callbacks to use for I/O. The mandatory
|
|
* callbacks are \a write and \a seek.
|
|
* \assert
|
|
* \code chain != NULL \endcode
|
|
* \retval FLAC__bool
|
|
* \c true if the write succeeded, else \c false. On failure,
|
|
* check the status with FLAC__metadata_chain_status().
|
|
*/
|
|
FLAC_API FLAC__bool FLAC__metadata_chain_write_with_callbacks(FLAC__Metadata_Chain *chain, FLAC__bool use_padding, FLAC__IOHandle handle, FLAC__IOCallbacks callbacks);
|
|
|
|
/** Write all metadata out to a FLAC stream via callbacks.
|
|
*
|
|
* (See FLAC__metadata_chain_write() for the details on how padding is
|
|
* used to write metadata in place if possible.)
|
|
*
|
|
* This version of the write-with-callbacks function must be used when
|
|
* FLAC__metadata_chain_check_if_tempfile_needed() returns true. In
|
|
* this function, you must supply an I/O handle corresponding to the
|
|
* FLAC file to edit, and a temporary handle to which the new FLAC
|
|
* file will be written. It is the caller's job to move this temporary
|
|
* FLAC file on top of the original FLAC file to complete the metadata
|
|
* edit.
|
|
*
|
|
* The \a handle must be open for reading and be seekable. The
|
|
* equivalent minimum stdio fopen() file mode is \c "r" (or \c "rb"
|
|
* for Windows).
|
|
*
|
|
* The \a temp_handle must be open for writing. The
|
|
* equivalent minimum stdio fopen() file mode is \c "w" (or \c "wb"
|
|
* for Windows). It should be an empty stream, or at least positioned
|
|
* at the start-of-file (in which case it is the caller's duty to
|
|
* truncate it on return).
|
|
*
|
|
* For this write function to be used, the chain must have been read with
|
|
* FLAC__metadata_chain_read_with_callbacks(), not FLAC__metadata_chain_read().
|
|
* Also, FLAC__metadata_chain_check_if_tempfile_needed() must have returned
|
|
* \c true.
|
|
*
|
|
* \param chain A pointer to an existing chain.
|
|
* \param use_padding See FLAC__metadata_chain_write()
|
|
* \param handle The I/O handle of the original FLAC stream to read.
|
|
* The handle will NOT be closed after the metadata is
|
|
* written; that is the duty of the caller.
|
|
* \param callbacks A set of callbacks to use for I/O on \a handle.
|
|
* The mandatory callbacks are \a read, \a seek, and
|
|
* \a eof.
|
|
* \param temp_handle The I/O handle of the FLAC stream to write. The
|
|
* handle will NOT be closed after the metadata is
|
|
* written; that is the duty of the caller.
|
|
* \param temp_callbacks
|
|
* A set of callbacks to use for I/O on temp_handle.
|
|
* The only mandatory callback is \a write.
|
|
* \assert
|
|
* \code chain != NULL \endcode
|
|
* \retval FLAC__bool
|
|
* \c true if the write succeeded, else \c false. On failure,
|
|
* check the status with FLAC__metadata_chain_status().
|
|
*/
|
|
FLAC_API FLAC__bool FLAC__metadata_chain_write_with_callbacks_and_tempfile(FLAC__Metadata_Chain *chain, FLAC__bool use_padding, FLAC__IOHandle handle, FLAC__IOCallbacks callbacks, FLAC__IOHandle temp_handle, FLAC__IOCallbacks temp_callbacks);
|
|
|
|
/** Merge adjacent PADDING blocks into a single block.
|
|
*
|
|
* \note This function does not write to the FLAC file, it only
|
|
* modifies the chain.
|
|
*
|
|
* \warning Any iterator on the current chain will become invalid after this
|
|
* call. You should delete the iterator and get a new one.
|
|
*
|
|
* \param chain A pointer to an existing chain.
|
|
* \assert
|
|
* \code chain != NULL \endcode
|
|
*/
|
|
FLAC_API void FLAC__metadata_chain_merge_padding(FLAC__Metadata_Chain *chain);
|
|
|
|
/** This function will move all PADDING blocks to the end on the metadata,
|
|
* then merge them into a single block.
|
|
*
|
|
* \note This function does not write to the FLAC file, it only
|
|
* modifies the chain.
|
|
*
|
|
* \warning Any iterator on the current chain will become invalid after this
|
|
* call. You should delete the iterator and get a new one.
|
|
*
|
|
* \param chain A pointer to an existing chain.
|
|
* \assert
|
|
* \code chain != NULL \endcode
|
|
*/
|
|
FLAC_API void FLAC__metadata_chain_sort_padding(FLAC__Metadata_Chain *chain);
|
|
|
|
|
|
/*********** FLAC__Metadata_Iterator ***********/
|
|
|
|
/** Create a new iterator instance.
|
|
*
|
|
* \retval FLAC__Metadata_Iterator*
|
|
* \c NULL if there was an error allocating memory, else the new instance.
|
|
*/
|
|
FLAC_API FLAC__Metadata_Iterator *FLAC__metadata_iterator_new();
|
|
|
|
/** Free an iterator instance. Deletes the object pointed to by \a iterator.
|
|
*
|
|
* \param iterator A pointer to an existing iterator.
|
|
* \assert
|
|
* \code iterator != NULL \endcode
|
|
*/
|
|
FLAC_API void FLAC__metadata_iterator_delete(FLAC__Metadata_Iterator *iterator);
|
|
|
|
/** Initialize the iterator to point to the first metadata block in the
|
|
* given chain.
|
|
*
|
|
* \param iterator A pointer to an existing iterator.
|
|
* \param chain A pointer to an existing and initialized (read) chain.
|
|
* \assert
|
|
* \code iterator != NULL \endcode
|
|
* \code chain != NULL \endcode
|
|
*/
|
|
FLAC_API void FLAC__metadata_iterator_init(FLAC__Metadata_Iterator *iterator, FLAC__Metadata_Chain *chain);
|
|
|
|
/** Moves the iterator forward one metadata block, returning \c false if
|
|
* already at the end.
|
|
*
|
|
* \param iterator A pointer to an existing initialized iterator.
|
|
* \assert
|
|
* \code iterator != NULL \endcode
|
|
* \a iterator has been successfully initialized with
|
|
* FLAC__metadata_iterator_init()
|
|
* \retval FLAC__bool
|
|
* \c false if already at the last metadata block of the chain, else
|
|
* \c true.
|
|
*/
|
|
FLAC_API FLAC__bool FLAC__metadata_iterator_next(FLAC__Metadata_Iterator *iterator);
|
|
|
|
/** Moves the iterator backward one metadata block, returning \c false if
|
|
* already at the beginning.
|
|
*
|
|
* \param iterator A pointer to an existing initialized iterator.
|
|
* \assert
|
|
* \code iterator != NULL \endcode
|
|
* \a iterator has been successfully initialized with
|
|
* FLAC__metadata_iterator_init()
|
|
* \retval FLAC__bool
|
|
* \c false if already at the first metadata block of the chain, else
|
|
* \c true.
|
|
*/
|
|
FLAC_API FLAC__bool FLAC__metadata_iterator_prev(FLAC__Metadata_Iterator *iterator);
|
|
|
|
/** Get the type of the metadata block at the current position.
|
|
*
|
|
* \param iterator A pointer to an existing initialized iterator.
|
|
* \assert
|
|
* \code iterator != NULL \endcode
|
|
* \a iterator has been successfully initialized with
|
|
* FLAC__metadata_iterator_init()
|
|
* \retval FLAC__MetadataType
|
|
* The type of the metadata block at the current iterator position.
|
|
*/
|
|
FLAC_API FLAC__MetadataType FLAC__metadata_iterator_get_block_type(const FLAC__Metadata_Iterator *iterator);
|
|
|
|
/** Get the metadata block at the current position. You can modify
|
|
* the block in place but must write the chain before the changes
|
|
* are reflected to the FLAC file. You do not need to call
|
|
* FLAC__metadata_iterator_set_block() to reflect the changes;
|
|
* the pointer returned by FLAC__metadata_iterator_get_block()
|
|
* points directly into the chain.
|
|
*
|
|
* \warning
|
|
* Do not call FLAC__metadata_object_delete() on the returned object;
|
|
* to delete a block use FLAC__metadata_iterator_delete_block().
|
|
*
|
|
* \param iterator A pointer to an existing initialized iterator.
|
|
* \assert
|
|
* \code iterator != NULL \endcode
|
|
* \a iterator has been successfully initialized with
|
|
* FLAC__metadata_iterator_init()
|
|
* \retval FLAC__StreamMetadata*
|
|
* The current metadata block.
|
|
*/
|
|
FLAC_API FLAC__StreamMetadata *FLAC__metadata_iterator_get_block(FLAC__Metadata_Iterator *iterator);
|
|
|
|
/** Set the metadata block at the current position, replacing the existing
|
|
* block. The new block passed in becomes owned by the chain and it will be
|
|
* deleted when the chain is deleted.
|
|
*
|
|
* \param iterator A pointer to an existing initialized iterator.
|
|
* \param block A pointer to a metadata block.
|
|
* \assert
|
|
* \code iterator != NULL \endcode
|
|
* \a iterator has been successfully initialized with
|
|
* FLAC__metadata_iterator_init()
|
|
* \code block != NULL \endcode
|
|
* \retval FLAC__bool
|
|
* \c false if the conditions in the above description are not met, or
|
|
* a memory allocation error occurs, otherwise \c true.
|
|
*/
|
|
FLAC_API FLAC__bool FLAC__metadata_iterator_set_block(FLAC__Metadata_Iterator *iterator, FLAC__StreamMetadata *block);
|
|
|
|
/** Removes the current block from the chain. If \a replace_with_padding is
|
|
* \c true, the block will instead be replaced with a padding block of equal
|
|
* size. You can not delete the STREAMINFO block. The iterator will be
|
|
* left pointing to the block before the one just "deleted", even if
|
|
* \a replace_with_padding is \c true.
|
|
*
|
|
* \param iterator A pointer to an existing initialized iterator.
|
|
* \param replace_with_padding See above.
|
|
* \assert
|
|
* \code iterator != NULL \endcode
|
|
* \a iterator has been successfully initialized with
|
|
* FLAC__metadata_iterator_init()
|
|
* \retval FLAC__bool
|
|
* \c false if the conditions in the above description are not met,
|
|
* otherwise \c true.
|
|
*/
|
|
FLAC_API FLAC__bool FLAC__metadata_iterator_delete_block(FLAC__Metadata_Iterator *iterator, FLAC__bool replace_with_padding);
|
|
|
|
/** Insert a new block before the current block. You cannot insert a block
|
|
* before the first STREAMINFO block. You cannot insert a STREAMINFO block
|
|
* as there can be only one, the one that already exists at the head when you
|
|
* read in a chain. The chain takes ownership of the new block and it will be
|
|
* deleted when the chain is deleted. The iterator will be left pointing to
|
|
* the new block.
|
|
*
|
|
* \param iterator A pointer to an existing initialized iterator.
|
|
* \param block A pointer to a metadata block to insert.
|
|
* \assert
|
|
* \code iterator != NULL \endcode
|
|
* \a iterator has been successfully initialized with
|
|
* FLAC__metadata_iterator_init()
|
|
* \retval FLAC__bool
|
|
* \c false if the conditions in the above description are not met, or
|
|
* a memory allocation error occurs, otherwise \c true.
|
|
*/
|
|
FLAC_API FLAC__bool FLAC__metadata_iterator_insert_block_before(FLAC__Metadata_Iterator *iterator, FLAC__StreamMetadata *block);
|
|
|
|
/** Insert a new block after the current block. You cannot insert a STREAMINFO
|
|
* block as there can be only one, the one that already exists at the head when
|
|
* you read in a chain. The chain takes ownership of the new block and it will
|
|
* be deleted when the chain is deleted. The iterator will be left pointing to
|
|
* the new block.
|
|
*
|
|
* \param iterator A pointer to an existing initialized iterator.
|
|
* \param block A pointer to a metadata block to insert.
|
|
* \assert
|
|
* \code iterator != NULL \endcode
|
|
* \a iterator has been successfully initialized with
|
|
* FLAC__metadata_iterator_init()
|
|
* \retval FLAC__bool
|
|
* \c false if the conditions in the above description are not met, or
|
|
* a memory allocation error occurs, otherwise \c true.
|
|
*/
|
|
FLAC_API FLAC__bool FLAC__metadata_iterator_insert_block_after(FLAC__Metadata_Iterator *iterator, FLAC__StreamMetadata *block);
|
|
|
|
/* \} */
|
|
|
|
|
|
/** \defgroup flac_metadata_object FLAC/metadata.h: metadata object methods
|
|
* \ingroup flac_metadata
|
|
*
|
|
* \brief
|
|
* This module contains methods for manipulating FLAC metadata objects.
|
|
*
|
|
* Since many are variable length we have to be careful about the memory
|
|
* management. We decree that all pointers to data in the object are
|
|
* owned by the object and memory-managed by the object.
|
|
*
|
|
* Use the FLAC__metadata_object_new() and FLAC__metadata_object_delete()
|
|
* functions to create all instances. When using the
|
|
* FLAC__metadata_object_set_*() functions to set pointers to data, set
|
|
* \a copy to \c true to have the function make it's own copy of the data, or
|
|
* to \c false to give the object ownership of your data. In the latter case
|
|
* your pointer must be freeable by free() and will be free()d when the object
|
|
* is FLAC__metadata_object_delete()d. It is legal to pass a null pointer as
|
|
* the data pointer to a FLAC__metadata_object_set_*() function as long as
|
|
* the length argument is 0 and the \a copy argument is \c false.
|
|
*
|
|
* The FLAC__metadata_object_new() and FLAC__metadata_object_clone() function
|
|
* will return \c NULL in the case of a memory allocation error, otherwise a new
|
|
* object. The FLAC__metadata_object_set_*() functions return \c false in the
|
|
* case of a memory allocation error.
|
|
*
|
|
* We don't have the convenience of C++ here, so note that the library relies
|
|
* on you to keep the types straight. In other words, if you pass, for
|
|
* example, a FLAC__StreamMetadata* that represents a STREAMINFO block to
|
|
* FLAC__metadata_object_application_set_data(), you will get an assertion
|
|
* failure.
|
|
*
|
|
* For convenience the FLAC__metadata_object_vorbiscomment_*() functions
|
|
* maintain a trailing NUL on each Vorbis comment entry. This is not counted
|
|
* toward the length or stored in the stream, but it can make working with plain
|
|
* comments (those that don't contain embedded-NULs in the value) easier.
|
|
* Entries passed into these functions have trailing NULs added if missing, and
|
|
* returned entries are guaranteed to have a trailing NUL.
|
|
*
|
|
* The FLAC__metadata_object_vorbiscomment_*() functions that take a Vorbis
|
|
* comment entry/name/value will first validate that it complies with the Vorbis
|
|
* comment specification and return false if it does not.
|
|
*
|
|
* There is no need to recalculate the length field on metadata blocks you
|
|
* have modified. They will be calculated automatically before they are
|
|
* written back to a file.
|
|
*
|
|
* \{
|
|
*/
|
|
|
|
|
|
/** Create a new metadata object instance of the given type.
|
|
*
|
|
* The object will be "empty"; i.e. values and data pointers will be \c 0,
|
|
* 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 or the type code is
|
|
* greater than FLAC__MAX_METADATA_TYPE_CODE, else the new instance.
|
|
*/
|
|
FLAC_API FLAC__StreamMetadata *FLAC__metadata_object_new(FLAC__MetadataType type);
|
|
|
|
/** Create a copy of an existing metadata object.
|
|
*
|
|
* The copy is a "deep" copy, i.e. dynamically allocated data within the
|
|
* object is also copied. The caller takes ownership of the new block and
|
|
* is responsible for freeing it with FLAC__metadata_object_delete().
|
|
*
|
|
* \param object Pointer to object to copy.
|
|
* \assert
|
|
* \code object != NULL \endcode
|
|
* \retval FLAC__StreamMetadata*
|
|
* \c NULL if there was an error allocating memory, else the new instance.
|
|
*/
|
|
FLAC_API FLAC__StreamMetadata *FLAC__metadata_object_clone(const FLAC__StreamMetadata *object);
|
|
|
|
/** Free a metadata object. Deletes the object pointed to by \a object.
|
|
*
|
|
* The delete is a "deep" delete, i.e. dynamically allocated data within the
|
|
* object is also deleted.
|
|
*
|
|
* \param object A pointer to an existing object.
|
|
* \assert
|
|
* \code object != NULL \endcode
|
|
*/
|
|
FLAC_API void FLAC__metadata_object_delete(FLAC__StreamMetadata *object);
|
|
|
|
/** Compares two metadata objects.
|
|
*
|
|
* The compare is "deep", i.e. dynamically allocated data within the
|
|
* object is also compared.
|
|
*
|
|
* \param block1 A pointer to an existing object.
|
|
* \param block2 A pointer to an existing object.
|
|
* \assert
|
|
* \code block1 != NULL \endcode
|
|
* \code block2 != NULL \endcode
|
|
* \retval FLAC__bool
|
|
* \c true if objects are identical, else \c false.
|
|
*/
|
|
FLAC_API FLAC__bool FLAC__metadata_object_is_equal(const FLAC__StreamMetadata *block1, const FLAC__StreamMetadata *block2);
|
|
|
|
/** Sets the application data of an APPLICATION block.
|
|
*
|
|
* If \a copy is \c true, a copy of the data is stored; otherwise, the object
|
|
* takes ownership of the pointer.
|
|
*
|
|
* \param object A pointer to an existing APPLICATION object.
|
|
* \param data A pointer to the data to set.
|
|
* \param length The length of \a data in bytes.
|
|
* \param copy See above.
|
|
* \assert
|
|
* \code object != NULL \endcode
|
|
* \code object->type == FLAC__METADATA_TYPE_APPLICATION \endcode
|
|
* \code (data != NULL && length > 0) ||
|
|
* (data == NULL && length == 0 && copy == false) \endcode
|
|
* \retval FLAC__bool
|
|
* \c false if \a copy is \c true and malloc() fails, else \c true.
|
|
*/
|
|
FLAC_API FLAC__bool FLAC__metadata_object_application_set_data(FLAC__StreamMetadata *object, FLAC__byte *data, unsigned length, FLAC__bool copy);
|
|
|
|
/** Resize the seekpoint array.
|
|
*
|
|
* If the size shrinks, elements will truncated; if it grows, new placeholder
|
|
* points will be added to the end.
|
|
*
|
|
* \param object A pointer to an existing SEEKTABLE object.
|
|
* \param new_num_points The desired length of the array; may be \c 0.
|
|
* \assert
|
|
* \code object != NULL \endcode
|
|
* \code object->type == FLAC__METADATA_TYPE_SEEKTABLE \endcode
|
|
* \code (object->data.seek_table.points == NULL && object->data.seek_table.num_points == 0) ||
|
|
* (object->data.seek_table.points != NULL && object->data.seek_table.num_points > 0) \endcode
|
|
* \retval FLAC__bool
|
|
* \c false if memory allocation error, else \c true.
|
|
*/
|
|
FLAC_API FLAC__bool FLAC__metadata_object_seektable_resize_points(FLAC__StreamMetadata *object, unsigned new_num_points);
|
|
|
|
/** Set a seekpoint in a seektable.
|
|
*
|
|
* \param object A pointer to an existing SEEKTABLE object.
|
|
* \param point_num Index into seekpoint array to set.
|
|
* \param point The point to set.
|
|
* \assert
|
|
* \code object != NULL \endcode
|
|
* \code object->type == FLAC__METADATA_TYPE_SEEKTABLE \endcode
|
|
* \code object->data.seek_table.num_points > point_num \endcode
|
|
*/
|
|
FLAC_API void FLAC__metadata_object_seektable_set_point(FLAC__StreamMetadata *object, unsigned point_num, FLAC__StreamMetadata_SeekPoint point);
|
|
|
|
/** Insert a seekpoint into a seektable.
|
|
*
|
|
* \param object A pointer to an existing SEEKTABLE object.
|
|
* \param point_num Index into seekpoint array to set.
|
|
* \param point The point to set.
|
|
* \assert
|
|
* \code object != NULL \endcode
|
|
* \code object->type == FLAC__METADATA_TYPE_SEEKTABLE \endcode
|
|
* \code object->data.seek_table.num_points >= point_num \endcode
|
|
* \retval FLAC__bool
|
|
* \c false if memory allocation error, else \c true.
|
|
*/
|
|
FLAC_API FLAC__bool FLAC__metadata_object_seektable_insert_point(FLAC__StreamMetadata *object, unsigned point_num, FLAC__StreamMetadata_SeekPoint point);
|
|
|
|
/** Delete a seekpoint from a seektable.
|
|
*
|
|
* \param object A pointer to an existing SEEKTABLE object.
|
|
* \param point_num Index into seekpoint array to set.
|
|
* \assert
|
|
* \code object != NULL \endcode
|
|
* \code object->type == FLAC__METADATA_TYPE_SEEKTABLE \endcode
|
|
* \code object->data.seek_table.num_points > point_num \endcode
|
|
* \retval FLAC__bool
|
|
* \c false if memory allocation error, else \c true.
|
|
*/
|
|
FLAC_API FLAC__bool FLAC__metadata_object_seektable_delete_point(FLAC__StreamMetadata *object, unsigned point_num);
|
|
|
|
/** Check a seektable to see if it conforms to the FLAC specification.
|
|
* See the format specification for limits on the contents of the
|
|
* seektable.
|
|
*
|
|
* \param object A pointer to an existing SEEKTABLE object.
|
|
* \assert
|
|
* \code object != NULL \endcode
|
|
* \code object->type == FLAC__METADATA_TYPE_SEEKTABLE \endcode
|
|
* \retval FLAC__bool
|
|
* \c false if seek table is illegal, else \c true.
|
|
*/
|
|
FLAC_API FLAC__bool FLAC__metadata_object_seektable_is_legal(const FLAC__StreamMetadata *object);
|
|
|
|
/** Append a number of placeholder points to the end of a seek table.
|
|
*
|
|
* \note
|
|
* As with the other ..._seektable_template_... functions, you should
|
|
* call FLAC__metadata_object_seektable_template_sort() when finished
|
|
* to make the seek table legal.
|
|
*
|
|
* \param object A pointer to an existing SEEKTABLE object.
|
|
* \param num The number of placeholder points to append.
|
|
* \assert
|
|
* \code object != NULL \endcode
|
|
* \code object->type == FLAC__METADATA_TYPE_SEEKTABLE \endcode
|
|
* \retval FLAC__bool
|
|
* \c false if memory allocation fails, else \c true.
|
|
*/
|
|
FLAC_API FLAC__bool FLAC__metadata_object_seektable_template_append_placeholders(FLAC__StreamMetadata *object, unsigned num);
|
|
|
|
/** Append a specific seek point template to the end of a seek table.
|
|
*
|
|
* \note
|
|
* As with the other ..._seektable_template_... functions, you should
|
|
* call FLAC__metadata_object_seektable_template_sort() when finished
|
|
* to make the seek table legal.
|
|
*
|
|
* \param object A pointer to an existing SEEKTABLE object.
|
|
* \param sample_number The sample number of the seek point template.
|
|
* \assert
|
|
* \code object != NULL \endcode
|
|
* \code object->type == FLAC__METADATA_TYPE_SEEKTABLE \endcode
|
|
* \retval FLAC__bool
|
|
* \c false if memory allocation fails, else \c true.
|
|
*/
|
|
FLAC_API FLAC__bool FLAC__metadata_object_seektable_template_append_point(FLAC__StreamMetadata *object, FLAC__uint64 sample_number);
|
|
|
|
/** Append specific seek point templates to the end of a seek table.
|
|
*
|
|
* \note
|
|
* As with the other ..._seektable_template_... functions, you should
|
|
* call FLAC__metadata_object_seektable_template_sort() when finished
|
|
* to make the seek table legal.
|
|
*
|
|
* \param object A pointer to an existing SEEKTABLE object.
|
|
* \param sample_numbers An array of sample numbers for the seek points.
|
|
* \param num The number of seek point templates to append.
|
|
* \assert
|
|
* \code object != NULL \endcode
|
|
* \code object->type == FLAC__METADATA_TYPE_SEEKTABLE \endcode
|
|
* \retval FLAC__bool
|
|
* \c false if memory allocation fails, else \c true.
|
|
*/
|
|
FLAC_API FLAC__bool FLAC__metadata_object_seektable_template_append_points(FLAC__StreamMetadata *object, FLAC__uint64 sample_numbers[], unsigned num);
|
|
|
|
/** Append a set of evenly-spaced seek point templates to the end of a
|
|
* seek table.
|
|
*
|
|
* \note
|
|
* As with the other ..._seektable_template_... functions, you should
|
|
* call FLAC__metadata_object_seektable_template_sort() when finished
|
|
* to make the seek table legal.
|
|
*
|
|
* \param object A pointer to an existing SEEKTABLE object.
|
|
* \param num The number of placeholder points to append.
|
|
* \param total_samples The total number of samples to be encoded;
|
|
* the seekpoints will be spaced approximately
|
|
* \a total_samples / \a num samples apart.
|
|
* \assert
|
|
* \code object != NULL \endcode
|
|
* \code object->type == FLAC__METADATA_TYPE_SEEKTABLE \endcode
|
|
* \retval FLAC__bool
|
|
* \c false if memory allocation fails, else \c true.
|
|
*/
|
|
FLAC_API FLAC__bool FLAC__metadata_object_seektable_template_append_spaced_points(FLAC__StreamMetadata *object, unsigned num, FLAC__uint64 total_samples);
|
|
|
|
/** Sort a seek table's seek points according to the format specification,
|
|
* removing duplicates.
|
|
*
|
|
* \param object A pointer to a seek table to be sorted.
|
|
* \param compact If \c false, behaves like FLAC__format_seektable_sort().
|
|
* If \c true, duplicates are deleted and the seek table is
|
|
* shrunk appropriately; the number of placeholder points
|
|
* present in the seek table will be the same after the call
|
|
* as before.
|
|
* \assert
|
|
* \code object != NULL \endcode
|
|
* \code object->type == FLAC__METADATA_TYPE_SEEKTABLE \endcode
|
|
* \retval FLAC__bool
|
|
* \c false if realloc() fails, else \c true.
|
|
*/
|
|
FLAC_API FLAC__bool FLAC__metadata_object_seektable_template_sort(FLAC__StreamMetadata *object, FLAC__bool compact);
|
|
|
|
/** Sets the vendor string in a VORBIS_COMMENT block.
|
|
*
|
|
* For convenience, a trailing NUL is added to the entry if it doesn't have
|
|
* one already.
|
|
*
|
|
* If \a copy is \c true, a copy of the entry is stored; otherwise, the object
|
|
* takes ownership of the \c entry.entry pointer.
|
|
*
|
|
* \note If this function returns \c false, the caller still owns the
|
|
* pointer.
|
|
*
|
|
* \param object A pointer to an existing VORBIS_COMMENT object.
|
|
* \param entry The entry to set the vendor string to.
|
|
* \param copy See above.
|
|
* \assert
|
|
* \code object != NULL \endcode
|
|
* \code object->type == FLAC__METADATA_TYPE_VORBIS_COMMENT \endcode
|
|
* \code (entry.entry != NULL && entry.length > 0) ||
|
|
* (entry.entry == NULL && entry.length == 0) \endcode
|
|
* \retval FLAC__bool
|
|
* \c false if memory allocation fails or \a entry does not comply with the
|
|
* Vorbis comment specification, else \c true.
|
|
*/
|
|
FLAC_API FLAC__bool FLAC__metadata_object_vorbiscomment_set_vendor_string(FLAC__StreamMetadata *object, FLAC__StreamMetadata_VorbisComment_Entry entry, FLAC__bool copy);
|
|
|
|
/** Resize the comment array.
|
|
*
|
|
* If the size shrinks, elements will truncated; if it grows, new empty
|
|
* fields will be added to the end.
|
|
*
|
|
* \param object A pointer to an existing VORBIS_COMMENT object.
|
|
* \param new_num_comments The desired length of the array; may be \c 0.
|
|
* \assert
|
|
* \code object != NULL \endcode
|
|
* \code object->type == FLAC__METADATA_TYPE_VORBIS_COMMENT \endcode
|
|
* \code (object->data.vorbis_comment.comments == NULL && object->data.vorbis_comment.num_comments == 0) ||
|
|
* (object->data.vorbis_comment.comments != NULL && object->data.vorbis_comment.num_comments > 0) \endcode
|
|
* \retval FLAC__bool
|
|
* \c false if memory allocation fails, else \c true.
|
|
*/
|
|
FLAC_API FLAC__bool FLAC__metadata_object_vorbiscomment_resize_comments(FLAC__StreamMetadata *object, unsigned new_num_comments);
|
|
|
|
/** Sets a comment in a VORBIS_COMMENT block.
|
|
*
|
|
* For convenience, a trailing NUL is added to the entry if it doesn't have
|
|
* one already.
|
|
*
|
|
* If \a copy is \c true, a copy of the entry is stored; otherwise, the object
|
|
* takes ownership of the \c entry.entry pointer.
|
|
*
|
|
* \note If this function returns \c false, the caller still owns the
|
|
* pointer.
|
|
*
|
|
* \param object A pointer to an existing VORBIS_COMMENT object.
|
|
* \param comment_num Index into comment array to set.
|
|
* \param entry The entry to set the comment to.
|
|
* \param copy See above.
|
|
* \assert
|
|
* \code object != NULL \endcode
|
|
* \code object->type == FLAC__METADATA_TYPE_VORBIS_COMMENT \endcode
|
|
* \code comment_num < object->data.vorbis_comment.num_comments \endcode
|
|
* \code (entry.entry != NULL && entry.length > 0) ||
|
|
* (entry.entry == NULL && entry.length == 0) \endcode
|
|
* \retval FLAC__bool
|
|
* \c false if memory allocation fails or \a entry does not comply with the
|
|
* Vorbis comment specification, else \c true.
|
|
*/
|
|
FLAC_API FLAC__bool FLAC__metadata_object_vorbiscomment_set_comment(FLAC__StreamMetadata *object, unsigned comment_num, FLAC__StreamMetadata_VorbisComment_Entry entry, FLAC__bool copy);
|
|
|
|
/** Insert a comment in a VORBIS_COMMENT block at the given index.
|
|
*
|
|
* For convenience, a trailing NUL is added to the entry if it doesn't have
|
|
* one already.
|
|
*
|
|
* If \a copy is \c true, a copy of the entry is stored; otherwise, the object
|
|
* takes ownership of the \c entry.entry pointer.
|
|
*
|
|
* \note If this function returns \c false, the caller still owns the
|
|
* pointer.
|
|
*
|
|
* \param object A pointer to an existing VORBIS_COMMENT object.
|
|
* \param comment_num The index at which to insert the comment. The comments
|
|
* at and after \a comment_num move right one position.
|
|
* To append a comment to the end, set \a comment_num to
|
|
* \c object->data.vorbis_comment.num_comments .
|
|
* \param entry The comment to insert.
|
|
* \param copy See above.
|
|
* \assert
|
|
* \code object != NULL \endcode
|
|
* \code object->type == FLAC__METADATA_TYPE_VORBIS_COMMENT \endcode
|
|
* \code object->data.vorbis_comment.num_comments >= comment_num \endcode
|
|
* \code (entry.entry != NULL && entry.length > 0) ||
|
|
* (entry.entry == NULL && entry.length == 0 && copy == false) \endcode
|
|
* \retval FLAC__bool
|
|
* \c false if memory allocation fails or \a entry does not comply with the
|
|
* Vorbis comment specification, else \c true.
|
|
*/
|
|
FLAC_API FLAC__bool FLAC__metadata_object_vorbiscomment_insert_comment(FLAC__StreamMetadata *object, unsigned comment_num, FLAC__StreamMetadata_VorbisComment_Entry entry, FLAC__bool copy);
|
|
|
|
/** Appends a comment to a VORBIS_COMMENT block.
|
|
*
|
|
* For convenience, a trailing NUL is added to the entry if it doesn't have
|
|
* one already.
|
|
*
|
|
* If \a copy is \c true, a copy of the entry is stored; otherwise, the object
|
|
* takes ownership of the \c entry.entry pointer.
|
|
*
|
|
* \note If this function returns \c false, the caller still owns the
|
|
* pointer.
|
|
*
|
|
* \param object A pointer to an existing VORBIS_COMMENT object.
|
|
* \param entry The comment to insert.
|
|
* \param copy See above.
|
|
* \assert
|
|
* \code object != NULL \endcode
|
|
* \code object->type == FLAC__METADATA_TYPE_VORBIS_COMMENT \endcode
|
|
* \code (entry.entry != NULL && entry.length > 0) ||
|
|
* (entry.entry == NULL && entry.length == 0 && copy == false) \endcode
|
|
* \retval FLAC__bool
|
|
* \c false if memory allocation fails or \a entry does not comply with the
|
|
* Vorbis comment specification, else \c true.
|
|
*/
|
|
FLAC_API FLAC__bool FLAC__metadata_object_vorbiscomment_append_comment(FLAC__StreamMetadata *object, FLAC__StreamMetadata_VorbisComment_Entry entry, FLAC__bool copy);
|
|
|
|
/** Replaces comments in a VORBIS_COMMENT block with a new one.
|
|
*
|
|
* For convenience, a trailing NUL is added to the entry if it doesn't have
|
|
* one already.
|
|
*
|
|
* Depending on the the value of \a all, either all or just the first comment
|
|
* whose field name(s) match the given entry's name will be replaced by the
|
|
* given entry. If no comments match, \a entry will simply be appended.
|
|
*
|
|
* If \a copy is \c true, a copy of the entry is stored; otherwise, the object
|
|
* takes ownership of the \c entry.entry pointer.
|
|
*
|
|
* \note If this function returns \c false, the caller still owns the
|
|
* pointer.
|
|
*
|
|
* \param object A pointer to an existing VORBIS_COMMENT object.
|
|
* \param entry The comment to insert.
|
|
* \param all If \c true, all comments whose field name matches
|
|
* \a entry's field name will be removed, and \a entry will
|
|
* be inserted at the position of the first matching
|
|
* comment. If \c false, only the first comment whose
|
|
* field name matches \a entry's field name will be
|
|
* replaced with \a entry.
|
|
* \param copy See above.
|
|
* \assert
|
|
* \code object != NULL \endcode
|
|
* \code object->type == FLAC__METADATA_TYPE_VORBIS_COMMENT \endcode
|
|
* \code (entry.entry != NULL && entry.length > 0) ||
|
|
* (entry.entry == NULL && entry.length == 0 && copy == false) \endcode
|
|
* \retval FLAC__bool
|
|
* \c false if memory allocation fails or \a entry does not comply with the
|
|
* Vorbis comment specification, else \c true.
|
|
*/
|
|
FLAC_API FLAC__bool FLAC__metadata_object_vorbiscomment_replace_comment(FLAC__StreamMetadata *object, FLAC__StreamMetadata_VorbisComment_Entry entry, FLAC__bool all, FLAC__bool copy);
|
|
|
|
/** Delete a comment in a VORBIS_COMMENT block at the given index.
|
|
*
|
|
* \param object A pointer to an existing VORBIS_COMMENT object.
|
|
* \param comment_num The index of the comment to delete.
|
|
* \assert
|
|
* \code object != NULL \endcode
|
|
* \code object->type == FLAC__METADATA_TYPE_VORBIS_COMMENT \endcode
|
|
* \code object->data.vorbis_comment.num_comments > comment_num \endcode
|
|
* \retval FLAC__bool
|
|
* \c false if realloc() fails, else \c true.
|
|
*/
|
|
FLAC_API FLAC__bool FLAC__metadata_object_vorbiscomment_delete_comment(FLAC__StreamMetadata *object, unsigned comment_num);
|
|
|
|
/** Creates a Vorbis comment entry from NUL-terminated name and value strings.
|
|
*
|
|
* On return, the filled-in \a entry->entry pointer will point to malloc()ed
|
|
* memory and shall be owned by the caller. For convenience the entry will
|
|
* have a terminating NUL.
|
|
*
|
|
* \param entry A pointer to a Vorbis comment entry. The entry's
|
|
* \c entry pointer should not point to allocated
|
|
* memory as it will be overwritten.
|
|
* \param field_name The field name in ASCII, \c NUL terminated.
|
|
* \param field_value The field value in UTF-8, \c NUL terminated.
|
|
* \assert
|
|
* \code entry != NULL \endcode
|
|
* \code field_name != NULL \endcode
|
|
* \code field_value != NULL \endcode
|
|
* \retval FLAC__bool
|
|
* \c false if malloc() fails, or if \a field_name or \a field_value does
|
|
* not comply with the Vorbis comment specification, else \c true.
|
|
*/
|
|
FLAC_API FLAC__bool FLAC__metadata_object_vorbiscomment_entry_from_name_value_pair(FLAC__StreamMetadata_VorbisComment_Entry *entry, const char *field_name, const char *field_value);
|
|
|
|
/** Splits a Vorbis comment entry into NUL-terminated name and value strings.
|
|
*
|
|
* The returned pointers to name and value will be allocated by malloc()
|
|
* and shall be owned by the caller.
|
|
*
|
|
* \param entry An existing Vorbis comment entry.
|
|
* \param field_name The address of where the returned pointer to the
|
|
* field name will be stored.
|
|
* \param field_value The address of where the returned pointer to the
|
|
* field value will be stored.
|
|
* \assert
|
|
* \code (entry.entry != NULL && entry.length > 0) \endcode
|
|
* \code memchr(entry.entry, '=', entry.length) != NULL \endcode
|
|
* \code field_name != NULL \endcode
|
|
* \code field_value != NULL \endcode
|
|
* \retval FLAC__bool
|
|
* \c false if memory allocation fails or \a entry does not comply with the
|
|
* Vorbis comment specification, else \c true.
|
|
*/
|
|
FLAC_API FLAC__bool FLAC__metadata_object_vorbiscomment_entry_to_name_value_pair(const FLAC__StreamMetadata_VorbisComment_Entry entry, char **field_name, char **field_value);
|
|
|
|
/** Check if the given Vorbis comment entry's field name matches the given
|
|
* field name.
|
|
*
|
|
* \param entry An existing Vorbis comment entry.
|
|
* \param field_name The field name to check.
|
|
* \param field_name_length The length of \a field_name, not including the
|
|
* terminating \c NUL.
|
|
* \assert
|
|
* \code (entry.entry != NULL && entry.length > 0) \endcode
|
|
* \retval FLAC__bool
|
|
* \c true if the field names match, else \c false
|
|
*/
|
|
FLAC_API FLAC__bool FLAC__metadata_object_vorbiscomment_entry_matches(const FLAC__StreamMetadata_VorbisComment_Entry entry, const char *field_name, unsigned field_name_length);
|
|
|
|
/** Find a Vorbis comment with the given field name.
|
|
*
|
|
* The search begins at entry number \a offset; use an offset of 0 to
|
|
* search from the beginning of the comment array.
|
|
*
|
|
* \param object A pointer to an existing VORBIS_COMMENT object.
|
|
* \param offset The offset into the comment array from where to start
|
|
* the search.
|
|
* \param field_name The field name of the comment to find.
|
|
* \assert
|
|
* \code object != NULL \endcode
|
|
* \code object->type == FLAC__METADATA_TYPE_VORBIS_COMMENT \endcode
|
|
* \code field_name != NULL \endcode
|
|
* \retval int
|
|
* The offset in the comment array of the first comment whose field
|
|
* name matches \a field_name, or \c -1 if no match was found.
|
|
*/
|
|
FLAC_API int FLAC__metadata_object_vorbiscomment_find_entry_from(const FLAC__StreamMetadata *object, unsigned offset, const char *field_name);
|
|
|
|
/** Remove first Vorbis comment matching the given field name.
|
|
*
|
|
* \param object A pointer to an existing VORBIS_COMMENT object.
|
|
* \param field_name The field name of comment to delete.
|
|
* \assert
|
|
* \code object != NULL \endcode
|
|
* \code object->type == FLAC__METADATA_TYPE_VORBIS_COMMENT \endcode
|
|
* \retval int
|
|
* \c -1 for memory allocation error, \c 0 for no matching entries,
|
|
* \c 1 for one matching entry deleted.
|
|
*/
|
|
FLAC_API int FLAC__metadata_object_vorbiscomment_remove_entry_matching(FLAC__StreamMetadata *object, const char *field_name);
|
|
|
|
/** Remove all Vorbis comments matching the given field name.
|
|
*
|
|
* \param object A pointer to an existing VORBIS_COMMENT object.
|
|
* \param field_name The field name of comments to delete.
|
|
* \assert
|
|
* \code object != NULL \endcode
|
|
* \code object->type == FLAC__METADATA_TYPE_VORBIS_COMMENT \endcode
|
|
* \retval int
|
|
* \c -1 for memory allocation error, \c 0 for no matching entries,
|
|
* else the number of matching entries deleted.
|
|
*/
|
|
FLAC_API int FLAC__metadata_object_vorbiscomment_remove_entries_matching(FLAC__StreamMetadata *object, const char *field_name);
|
|
|
|
/** Create a new CUESHEET track instance.
|
|
*
|
|
* The object will be "empty"; i.e. values and data pointers will be \c 0.
|
|
*
|
|
* \retval FLAC__StreamMetadata_CueSheet_Track*
|
|
* \c NULL if there was an error allocating memory, else the new instance.
|
|
*/
|
|
FLAC_API FLAC__StreamMetadata_CueSheet_Track *FLAC__metadata_object_cuesheet_track_new();
|
|
|
|
/** Create a copy of an existing CUESHEET track object.
|
|
*
|
|
* The copy is a "deep" copy, i.e. dynamically allocated data within the
|
|
* object is also copied. The caller takes ownership of the new object and
|
|
* is responsible for freeing it with
|
|
* FLAC__metadata_object_cuesheet_track_delete().
|
|
*
|
|
* \param object Pointer to object to copy.
|
|
* \assert
|
|
* \code object != NULL \endcode
|
|
* \retval FLAC__StreamMetadata_CueSheet_Track*
|
|
* \c NULL if there was an error allocating memory, else the new instance.
|
|
*/
|
|
FLAC_API FLAC__StreamMetadata_CueSheet_Track *FLAC__metadata_object_cuesheet_track_clone(const FLAC__StreamMetadata_CueSheet_Track *object);
|
|
|
|
/** Delete a CUESHEET track object
|
|
*
|
|
* \param object A pointer to an existing CUESHEET track object.
|
|
* \assert
|
|
* \code object != NULL \endcode
|
|
*/
|
|
FLAC_API void FLAC__metadata_object_cuesheet_track_delete(FLAC__StreamMetadata_CueSheet_Track *object);
|
|
|
|
/** Resize a track's index point array.
|
|
*
|
|
* If the size shrinks, elements will truncated; if it grows, new blank
|
|
* indices will be added to the end.
|
|
*
|
|
* \param object A pointer to an existing CUESHEET object.
|
|
* \param track_num The index of the track to modify. NOTE: this is not
|
|
* necessarily the same as the track's \a number field.
|
|
* \param new_num_indices The desired length of the array; may be \c 0.
|
|
* \assert
|
|
* \code object != NULL \endcode
|
|
* \code object->type == FLAC__METADATA_TYPE_CUESHEET \endcode
|
|
* \code object->data.cue_sheet.num_tracks > track_num \endcode
|
|
* \code (object->data.cue_sheet.tracks[track_num].indices == NULL && object->data.cue_sheet.tracks[track_num].num_indices == 0) ||
|
|
* (object->data.cue_sheet.tracks[track_num].indices != NULL && object->data.cue_sheet.tracks[track_num].num_indices > 0) \endcode
|
|
* \retval FLAC__bool
|
|
* \c false if memory allocation error, else \c true.
|
|
*/
|
|
FLAC_API FLAC__bool FLAC__metadata_object_cuesheet_track_resize_indices(FLAC__StreamMetadata *object, unsigned track_num, unsigned new_num_indices);
|
|
|
|
/** Insert an index point in a CUESHEET track at the given index.
|
|
*
|
|
* \param object A pointer to an existing CUESHEET object.
|
|
* \param track_num The index of the track to modify. NOTE: this is not
|
|
* necessarily the same as the track's \a number field.
|
|
* \param index_num The index into the track's index array at which to
|
|
* insert the index point. NOTE: this is not necessarily
|
|
* the same as the index point's \a number field. The
|
|
* indices at and after \a index_num move right one
|
|
* position. To append an index point to the end, set
|
|
* \a index_num to
|
|
* \c object->data.cue_sheet.tracks[track_num].num_indices .
|
|
* \param index The index point to insert.
|
|
* \assert
|
|
* \code object != NULL \endcode
|
|
* \code object->type == FLAC__METADATA_TYPE_CUESHEET \endcode
|
|
* \code object->data.cue_sheet.num_tracks > track_num \endcode
|
|
* \code object->data.cue_sheet.tracks[track_num].num_indices >= index_num \endcode
|
|
* \retval FLAC__bool
|
|
* \c false if realloc() fails, else \c true.
|
|
*/
|
|
FLAC_API FLAC__bool FLAC__metadata_object_cuesheet_track_insert_index(FLAC__StreamMetadata *object, unsigned track_num, unsigned index_num, FLAC__StreamMetadata_CueSheet_Index index);
|
|
|
|
/** Insert a blank index point in a CUESHEET track at the given index.
|
|
*
|
|
* A blank index point is one in which all field values are zero.
|
|
*
|
|
* \param object A pointer to an existing CUESHEET object.
|
|
* \param track_num The index of the track to modify. NOTE: this is not
|
|
* necessarily the same as the track's \a number field.
|
|
* \param index_num The index into the track's index array at which to
|
|
* insert the index point. NOTE: this is not necessarily
|
|
* the same as the index point's \a number field. The
|
|
* indices at and after \a index_num move right one
|
|
* position. To append an index point to the end, set
|
|
* \a index_num to
|
|
* \c object->data.cue_sheet.tracks[track_num].num_indices .
|
|
* \assert
|
|
* \code object != NULL \endcode
|
|
* \code object->type == FLAC__METADATA_TYPE_CUESHEET \endcode
|
|
* \code object->data.cue_sheet.num_tracks > track_num \endcode
|
|
* \code object->data.cue_sheet.tracks[track_num].num_indices >= index_num \endcode
|
|
* \retval FLAC__bool
|
|
* \c false if realloc() fails, else \c true.
|
|
*/
|
|
FLAC_API FLAC__bool FLAC__metadata_object_cuesheet_track_insert_blank_index(FLAC__StreamMetadata *object, unsigned track_num, unsigned index_num);
|
|
|
|
/** Delete an index point in a CUESHEET track at the given index.
|
|
*
|
|
* \param object A pointer to an existing CUESHEET object.
|
|
* \param track_num The index into the track array of the track to
|
|
* modify. NOTE: this is not necessarily the same
|
|
* as the track's \a number field.
|
|
* \param index_num The index into the track's index array of the index
|
|
* to delete. NOTE: this is not necessarily the same
|
|
* as the index's \a number field.
|
|
* \assert
|
|
* \code object != NULL \endcode
|
|
* \code object->type == FLAC__METADATA_TYPE_CUESHEET \endcode
|
|
* \code object->data.cue_sheet.num_tracks > track_num \endcode
|
|
* \code object->data.cue_sheet.tracks[track_num].num_indices > index_num \endcode
|
|
* \retval FLAC__bool
|
|
* \c false if realloc() fails, else \c true.
|
|
*/
|
|
FLAC_API FLAC__bool FLAC__metadata_object_cuesheet_track_delete_index(FLAC__StreamMetadata *object, unsigned track_num, unsigned index_num);
|
|
|
|
/** Resize the track array.
|
|
*
|
|
* If the size shrinks, elements will truncated; if it grows, new blank
|
|
* tracks will be added to the end.
|
|
*
|
|
* \param object A pointer to an existing CUESHEET object.
|
|
* \param new_num_tracks The desired length of the array; may be \c 0.
|
|
* \assert
|
|
* \code object != NULL \endcode
|
|
* \code object->type == FLAC__METADATA_TYPE_CUESHEET \endcode
|
|
* \code (object->data.cue_sheet.tracks == NULL && object->data.cue_sheet.num_tracks == 0) ||
|
|
* (object->data.cue_sheet.tracks != NULL && object->data.cue_sheet.num_tracks > 0) \endcode
|
|
* \retval FLAC__bool
|
|
* \c false if memory allocation error, else \c true.
|
|
*/
|
|
FLAC_API FLAC__bool FLAC__metadata_object_cuesheet_resize_tracks(FLAC__StreamMetadata *object, unsigned new_num_tracks);
|
|
|
|
/** Sets a track in a CUESHEET block.
|
|
*
|
|
* If \a copy is \c true, a copy of the track is stored; otherwise, the object
|
|
* takes ownership of the \a track pointer.
|
|
*
|
|
* \param object A pointer to an existing CUESHEET object.
|
|
* \param track_num Index into track array to set. NOTE: this is not
|
|
* necessarily the same as the track's \a number field.
|
|
* \param track The track to set the track to. You may safely pass in
|
|
* a const pointer if \a copy is \c true.
|
|
* \param copy See above.
|
|
* \assert
|
|
* \code object != NULL \endcode
|
|
* \code object->type == FLAC__METADATA_TYPE_CUESHEET \endcode
|
|
* \code track_num < object->data.cue_sheet.num_tracks \endcode
|
|
* \code (track->indices != NULL && track->num_indices > 0) ||
|
|
* (track->indices == NULL && track->num_indices == 0)
|
|
* \retval FLAC__bool
|
|
* \c false if \a copy is \c true and malloc() fails, else \c true.
|
|
*/
|
|
FLAC_API FLAC__bool FLAC__metadata_object_cuesheet_set_track(FLAC__StreamMetadata *object, unsigned track_num, FLAC__StreamMetadata_CueSheet_Track *track, FLAC__bool copy);
|
|
|
|
/** Insert a track in a CUESHEET block at the given index.
|
|
*
|
|
* If \a copy is \c true, a copy of the track is stored; otherwise, the object
|
|
* takes ownership of the \a track pointer.
|
|
*
|
|
* \param object A pointer to an existing CUESHEET object.
|
|
* \param track_num The index at which to insert the track. NOTE: this
|
|
* is not necessarily the same as the track's \a number
|
|
* field. The tracks at and after \a track_num move right
|
|
* one position. To append a track to the end, set
|
|
* \a track_num to \c object->data.cue_sheet.num_tracks .
|
|
* \param track The track to insert. You may safely pass in a const
|
|
* pointer if \a copy is \c true.
|
|
* \param copy See above.
|
|
* \assert
|
|
* \code object != NULL \endcode
|
|
* \code object->type == FLAC__METADATA_TYPE_CUESHEET \endcode
|
|
* \code object->data.cue_sheet.num_tracks >= track_num \endcode
|
|
* \retval FLAC__bool
|
|
* \c false if \a copy is \c true and malloc() fails, else \c true.
|
|
*/
|
|
FLAC_API FLAC__bool FLAC__metadata_object_cuesheet_insert_track(FLAC__StreamMetadata *object, unsigned track_num, FLAC__StreamMetadata_CueSheet_Track *track, FLAC__bool copy);
|
|
|
|
/** Insert a blank track in a CUESHEET block at the given index.
|
|
*
|
|
* A blank track is one in which all field values are zero.
|
|
*
|
|
* \param object A pointer to an existing CUESHEET object.
|
|
* \param track_num The index at which to insert the track. NOTE: this
|
|
* is not necessarily the same as the track's \a number
|
|
* field. The tracks at and after \a track_num move right
|
|
* one position. To append a track to the end, set
|
|
* \a track_num to \c object->data.cue_sheet.num_tracks .
|
|
* \assert
|
|
* \code object != NULL \endcode
|
|
* \code object->type == FLAC__METADATA_TYPE_CUESHEET \endcode
|
|
* \code object->data.cue_sheet.num_tracks >= track_num \endcode
|
|
* \retval FLAC__bool
|
|
* \c false if \a copy is \c true and malloc() fails, else \c true.
|
|
*/
|
|
FLAC_API FLAC__bool FLAC__metadata_object_cuesheet_insert_blank_track(FLAC__StreamMetadata *object, unsigned track_num);
|
|
|
|
/** Delete a track in a CUESHEET block at the given index.
|
|
*
|
|
* \param object A pointer to an existing CUESHEET object.
|
|
* \param track_num The index into the track array of the track to
|
|
* delete. NOTE: this is not necessarily the same
|
|
* as the track's \a number field.
|
|
* \assert
|
|
* \code object != NULL \endcode
|
|
* \code object->type == FLAC__METADATA_TYPE_CUESHEET \endcode
|
|
* \code object->data.cue_sheet.num_tracks > track_num \endcode
|
|
* \retval FLAC__bool
|
|
* \c false if realloc() fails, else \c true.
|
|
*/
|
|
FLAC_API FLAC__bool FLAC__metadata_object_cuesheet_delete_track(FLAC__StreamMetadata *object, unsigned track_num);
|
|
|
|
/** Check a cue sheet to see if it conforms to the FLAC specification.
|
|
* See the format specification for limits on the contents of the
|
|
* cue sheet.
|
|
*
|
|
* \param object A pointer to an existing CUESHEET object.
|
|
* \param check_cd_da_subset If \c true, check CUESHEET against more
|
|
* stringent requirements for a CD-DA (audio) disc.
|
|
* \param violation Address of a pointer to a string. If there is a
|
|
* violation, a pointer to a string explanation of the
|
|
* violation will be returned here. \a violation may be
|
|
* \c NULL if you don't need the returned string. Do not
|
|
* free the returned string; it will always point to static
|
|
* data.
|
|
* \assert
|
|
* \code object != NULL \endcode
|
|
* \code object->type == FLAC__METADATA_TYPE_CUESHEET \endcode
|
|
* \retval FLAC__bool
|
|
* \c false if cue sheet is illegal, else \c true.
|
|
*/
|
|
FLAC_API FLAC__bool FLAC__metadata_object_cuesheet_is_legal(const FLAC__StreamMetadata *object, FLAC__bool check_cd_da_subset, const char **violation);
|
|
|
|
/* \} */
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
|
|
#endif
|