FLAC/metadata.h: metadata level 0 interface

The level 0 interface consists of individual routines to read the STREAMINFO, VORBIS_COMMENT, CUESHEET, and PICTURE blocks, requiring only a filename. More...

Collaboration diagram for FLAC/metadata.h: metadata level 0 interface:

Functions
FLAC_API FLAC__bool	FLAC__metadata_get_streaminfo (const char *filename, FLAC__StreamMetadata *streaminfo)
FLAC_API FLAC__bool	FLAC__metadata_get_tags (const char *filename, FLAC__StreamMetadata **tags)
FLAC_API FLAC__bool	FLAC__metadata_get_cuesheet (const char *filename, FLAC__StreamMetadata **cuesheet)
FLAC_API FLAC__bool	FLAC__metadata_get_picture (const char *filename, FLAC__StreamMetadata **picture, FLAC__StreamMetadata_Picture_Type type, const char *mime_type, const FLAC__byte *description, unsigned max_width, unsigned max_height, unsigned max_depth, unsigned max_colors)

Detailed Description

The level 0 interface consists of individual routines to read the STREAMINFO, VORBIS_COMMENT, CUESHEET, and PICTURE blocks, requiring only a filename.

They try to skip any ID3v2 tag at the head of the file.

Function Documentation

FLAC__metadata_get_cuesheet()

FLAC_API FLAC__bool FLAC__metadata_get_cuesheet	(	const char *	filename,
		FLAC__StreamMetadata **	cuesheet
	)

Read the CUESHEET metadata block of the given FLAC file. This function will try to skip any ID3v2 tag at the head of the file.

Parameters

filename	The path to the FLAC file to read.
cuesheet	The address where the returned pointer will be stored. The cuesheet object must be deleted by the caller using FLAC__metadata_object_delete(). filename != NULL cuesheet != NULL

Return values

FLAC__bool

true if a valid CUESHEET block was read from filename, and *cuesheet will be set to the address of the metadata structure. Returns false if there was a memory allocation error, a file decoder error, or the file contained no CUESHEET block, and *cuesheet will be set to NULL.

FLAC__metadata_get_picture()

FLAC_API FLAC__bool FLAC__metadata_get_picture	(	const char *	filename,
		FLAC__StreamMetadata **	picture,
		FLAC__StreamMetadata_Picture_Type	type,
		const char *	mime_type,
		const FLAC__byte *	description,
		unsigned	max_width,
		unsigned	max_height,
		unsigned	max_depth,
		unsigned	max_colors
	)

Read a PICTURE metadata block of the given FLAC file. This function will try to skip any ID3v2 tag at the head of the file. Since there can be more than one PICTURE block in a file, this function takes a number of parameters that act as constraints to the search. The PICTURE block with the largest area matching all the constraints will be returned, or *picture will be set to NULL if there was no such block.

Parameters

filename	The path to the FLAC file to read.
picture	The address where the returned pointer will be stored. The picture object must be deleted by the caller using FLAC__metadata_object_delete().
type	The desired picture type. Use -1 to mean "any type".
mime_type	The desired MIME type, e.g. "image/jpeg". The string will be matched exactly. Use NULL to mean "any MIME type".
description	The desired description. The string will be matched exactly. Use NULL to mean "any description".
max_width	The maximum width in pixels desired. Use (unsigned)(-1) to mean "any width".
max_height	The maximum height in pixels desired. Use (unsigned)(-1) to mean "any height".
max_depth	The maximum color depth in bits-per-pixel desired. Use (unsigned)(-1) to mean "any depth".
max_colors	The maximum number of colors desired. Use (unsigned)(-1) to mean "any number of colors". filename != NULL picture != NULL

Return values

FLAC__bool

true if a valid PICTURE block was read from filename, and *picture will be set to the address of the metadata structure. Returns false if there was a memory allocation error, a file decoder error, or the file contained no PICTURE block, and *picture will be set to NULL.

FLAC__metadata_get_streaminfo()

FLAC_API FLAC__bool FLAC__metadata_get_streaminfo	(	const char *	filename,
		FLAC__StreamMetadata *	streaminfo
	)

Read the STREAMINFO metadata block of the given FLAC file. This function will try to skip any ID3v2 tag at the head of the file.

Parameters

filename	The path to the FLAC file to read.
streaminfo	A pointer to space for the STREAMINFO block. Since FLAC__StreamMetadata is a simple structure with no memory allocation involved, you pass the address of an existing structure. It need not be initialized. filename != NULL streaminfo != NULL

Return values

FLAC__bool

true if a valid STREAMINFO block was read from filename. Returns false if there was a memory allocation error, a file decoder error, or the file contained no STREAMINFO block. (A memory allocation error is possible because this function must set up a file decoder.)

FLAC__metadata_get_tags()

FLAC_API FLAC__bool FLAC__metadata_get_tags	(	const char *	filename,
		FLAC__StreamMetadata **	tags
	)

Read the VORBIS_COMMENT metadata block of the given FLAC file. This function will try to skip any ID3v2 tag at the head of the file.

Parameters

filename	The path to the FLAC file to read.
tags	The address where the returned pointer will be stored. The tags object must be deleted by the caller using FLAC__metadata_object_delete(). filename != NULL tags != NULL

Return values

FLAC__bool

true if a valid VORBIS_COMMENT block was read from filename, and *tags will be set to the address of the metadata structure. Returns false if there was a memory allocation error, a file decoder error, or the file contained no VORBIS_COMMENT block, and *tags will be set to NULL.