mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-07-03 13:16:04 +00:00
2e05af3876
Reversing the unsynchronisation seems to work slightly differently for ID3 v2.3 tags and v2.4 tags: v2.3 tags don't have syncsafe frame sizes in the frame header, so the unsynchronisation is applied to the whole frame data including all the frame headers. v2.4 frames have sync-safe sizes, however, so the unsynchronisation only needs to be applied to the actual frame data, and it seems that's what's being done as well. So we need to undo the unsynchronisation on a per-frame basis for v2.4 tags for things to work properly. Fixes extraction of coverart/images from APIC frames in ID3 v2.4 tags (#588148). Add unit test for this as well.
123 lines
3.3 KiB
C
123 lines
3.3 KiB
C
/* Copyright 2005 Jan Schmidt <thaytan@mad.scientist.com>
|
|
*
|
|
* This library is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Library General Public
|
|
* License as published by the Free Software Foundation; either
|
|
* version 2 of the License, or (at your option) any later version.
|
|
*
|
|
* This library is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* Library General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Library General Public
|
|
* License along with this library; if not, write to the
|
|
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
|
|
* Boston, MA 02111-1307, USA.
|
|
*/
|
|
|
|
#ifndef __ID3TAGS_H__
|
|
#define __ID3TAGS_H__
|
|
|
|
#include <gst/gst.h>
|
|
|
|
G_BEGIN_DECLS
|
|
|
|
/* private tag for storing unprocessed ID3v2 frames */
|
|
#define GST_ID3_DEMUX_TAG_ID3V2_FRAME "private-id3v2-frame"
|
|
|
|
#define ID3V1_TAG_SIZE 128
|
|
#define ID3V2_MARK_SIZE 3
|
|
#define ID3V2_HDR_SIZE 10
|
|
|
|
typedef enum {
|
|
ID3TAGS_MORE_DATA,
|
|
ID3TAGS_READ_TAG,
|
|
ID3TAGS_BROKEN_TAG
|
|
} ID3TagsResult;
|
|
|
|
/* From id3tags.c */
|
|
guint id3demux_calc_id3v2_tag_size (GstBuffer * buf);
|
|
ID3TagsResult id3demux_read_id3v2_tag (GstBuffer *buffer, guint *id3v2_size,
|
|
GstTagList **tags);
|
|
|
|
guint read_synch_uint (const guint8 * data, guint size);
|
|
|
|
/* Things shared by id3tags.c and id3v2frames.c */
|
|
#define ID3V2_VERSION 0x0400
|
|
#define ID3V2_VER_MAJOR(v) ((v) >> 8)
|
|
#define ID3V2_VER_MINOR(v) ((v) & 0xff)
|
|
|
|
typedef struct {
|
|
guint16 version;
|
|
guint8 flags;
|
|
guint32 size;
|
|
|
|
guint8 *frame_data;
|
|
guint32 frame_data_size;
|
|
|
|
guint32 ext_hdr_size;
|
|
guint8 ext_flag_bytes;
|
|
guint8 *ext_flag_data;
|
|
} ID3v2Header;
|
|
|
|
typedef struct {
|
|
ID3v2Header hdr;
|
|
|
|
GstBuffer *buffer;
|
|
GstTagList *tags;
|
|
|
|
/* Current frame decoding */
|
|
guint cur_frame_size;
|
|
gchar *frame_id;
|
|
guint16 frame_flags;
|
|
|
|
guint8 *parse_data;
|
|
guint parse_size;
|
|
|
|
/* To collect day/month from obsolete TDAT frame if it exists */
|
|
guint pending_month;
|
|
guint pending_day;
|
|
} ID3TagsWorking;
|
|
|
|
enum {
|
|
ID3V2_HDR_FLAG_UNSYNC = 0x80,
|
|
ID3V2_HDR_FLAG_EXTHDR = 0x40,
|
|
ID3V2_HDR_FLAG_EXPERIMENTAL = 0x20,
|
|
ID3V2_HDR_FLAG_FOOTER = 0x10
|
|
};
|
|
|
|
enum {
|
|
ID3V2_EXT_FLAG_UPDATE = 0x80,
|
|
ID3V2_EXT_FLAG_CRC = 0x40,
|
|
ID3V2_EXT_FLAG_RESTRICTED = 0x20
|
|
};
|
|
|
|
enum {
|
|
ID3V2_FRAME_STATUS_FRAME_ALTER_PRESERVE = 0x4000,
|
|
ID3V2_FRAME_STATUS_FILE_ALTER_PRESERVE = 0x2000,
|
|
ID3V2_FRAME_STATUS_READONLY = 0x1000,
|
|
ID3V2_FRAME_FORMAT_GROUPING_ID = 0x0040,
|
|
ID3V2_FRAME_FORMAT_COMPRESSION = 0x0008,
|
|
ID3V2_FRAME_FORMAT_ENCRYPTION = 0x0004,
|
|
ID3V2_FRAME_FORMAT_UNSYNCHRONISATION = 0x0002,
|
|
ID3V2_FRAME_FORMAT_DATA_LENGTH_INDICATOR = 0x0001
|
|
};
|
|
|
|
#define ID3V2_3_FRAME_FLAGS_MASK \
|
|
(ID3V2_FRAME_STATUS_FRAME_ALTER_PRESERVE | \
|
|
ID3V2_FRAME_STATUS_FILE_ALTER_PRESERVE | \
|
|
ID3V2_FRAME_STATUS_READONLY | \
|
|
ID3V2_FRAME_FORMAT_GROUPING_ID | \
|
|
ID3V2_FRAME_FORMAT_COMPRESSION | \
|
|
ID3V2_FRAME_FORMAT_ENCRYPTION)
|
|
|
|
/* From id3v2frames.c */
|
|
gboolean id3demux_id3v2_parse_frame (ID3TagsWorking *work);
|
|
|
|
guint8 * id3demux_ununsync_data (const guint8 * unsync_data, guint32 * size);
|
|
|
|
G_END_DECLS
|
|
|
|
#endif
|