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123 lines
3.5 KiB
123 lines
3.5 KiB
/* |
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* ID3v2 header parser |
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* Copyright (c) 2003 Fabrice Bellard |
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* |
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* This file is part of Libav. |
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* |
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* Libav is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Lesser General Public |
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* License as published by the Free Software Foundation; either |
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* version 2.1 of the License, or (at your option) any later version. |
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* |
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* Libav is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public |
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* License along with Libav; if not, write to the Free Software |
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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*/ |
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#ifndef AVFORMAT_ID3V2_H |
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#define AVFORMAT_ID3V2_H |
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#include <stdint.h> |
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#include "avformat.h" |
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#include "metadata.h" |
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#define ID3v2_HEADER_SIZE 10 |
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/** |
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* Default magic bytes for ID3v2 header: "ID3" |
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*/ |
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#define ID3v2_DEFAULT_MAGIC "ID3" |
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#define ID3v2_FLAG_DATALEN 0x0001 |
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#define ID3v2_FLAG_UNSYNCH 0x0002 |
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#define ID3v2_FLAG_ENCRYPTION 0x0004 |
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#define ID3v2_FLAG_COMPRESSION 0x0008 |
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enum ID3v2Encoding { |
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ID3v2_ENCODING_ISO8859 = 0, |
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ID3v2_ENCODING_UTF16BOM = 1, |
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ID3v2_ENCODING_UTF16BE = 2, |
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ID3v2_ENCODING_UTF8 = 3, |
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}; |
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typedef struct ID3v2ExtraMeta { |
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const char *tag; |
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void *data; |
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struct ID3v2ExtraMeta *next; |
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} ID3v2ExtraMeta; |
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typedef struct ID3v2ExtraMetaGEOB { |
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uint32_t datasize; |
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uint8_t *mime_type; |
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uint8_t *file_name; |
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uint8_t *description; |
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uint8_t *data; |
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} ID3v2ExtraMetaGEOB; |
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/** |
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* Detect ID3v2 Header. |
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* @param buf must be ID3v2_HEADER_SIZE byte long |
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* @param magic magic bytes to identify the header. |
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* If in doubt, use ID3v2_DEFAULT_MAGIC. |
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*/ |
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int ff_id3v2_match(const uint8_t *buf, const char *magic); |
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/** |
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* Get the length of an ID3v2 tag. |
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* @param buf must be ID3v2_HEADER_SIZE bytes long and point to the start of an |
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* already detected ID3v2 tag |
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*/ |
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int ff_id3v2_tag_len(const uint8_t *buf); |
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/** |
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* Read an ID3v2 tag (text tags only) |
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*/ |
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void ff_id3v2_read(AVFormatContext *s, const char *magic); |
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/** |
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* Read an ID3v2 tag, including supported extra metadata (currently only GEOB) |
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* @param extra_meta If not NULL, extra metadata is parsed into a list of |
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* ID3v2ExtraMeta structs and *extra_meta points to the head of the list |
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*/ |
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void ff_id3v2_read_all(AVFormatContext *s, const char *magic, ID3v2ExtraMeta **extra_meta); |
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/** |
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* Write an ID3v2 tag. |
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* @param id3v2_version Subversion of ID3v2; supported values are 3 and 4 |
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* @param magic magic bytes to identify the header |
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* If in doubt, use ID3v2_DEFAULT_MAGIC. |
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*/ |
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int ff_id3v2_write(struct AVFormatContext *s, int id3v2_version, const char *magic); |
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/** |
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* Free memory allocated parsing special (non-text) metadata. |
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* @param extra_meta Pointer to a pointer to the head of a ID3v2ExtraMeta list, *extra_meta is set to NULL. |
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*/ |
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void ff_id3v2_free_extra_meta(ID3v2ExtraMeta **extra_meta); |
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extern const AVMetadataConv ff_id3v2_34_metadata_conv[]; |
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extern const AVMetadataConv ff_id3v2_4_metadata_conv[]; |
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/** |
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* A list of text information frames allowed in both ID3 v2.3 and v2.4 |
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* http://www.id3.org/id3v2.4.0-frames |
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* http://www.id3.org/id3v2.4.0-changes |
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*/ |
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extern const char ff_id3v2_tags[][4]; |
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/** |
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* ID3v2.4-only text information frames. |
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*/ |
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extern const char ff_id3v2_4_tags[][4]; |
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/** |
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* ID3v2.3-only text information frames. |
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*/ |
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extern const char ff_id3v2_3_tags[][4]; |
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#endif /* AVFORMAT_ID3V2_H */
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