gst/matroska/: Make sure that every Tags element is only parsed once and it's contain...
[platform/upstream/gst-plugins-good.git] / gst / matroska / ebml-read.h
1 /* GStreamer EBML I/O
2  * (c) 2003 Ronald Bultje <rbultje@ronald.bitfreak.net>
3  *
4  * ebml-read.c: read EBML data from file/stream
5  *
6  * This library is free software; you can redistribute it and/or
7  * modify it under the terms of the GNU Library General Public
8  * License as published by the Free Software Foundation; either
9  * version 2 of the License, or (at your option) any later version.
10  *
11  * This library is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
14  * Library General Public License for more details.
15  *
16  * You should have received a copy of the GNU Library General Public
17  * License along with this library; if not, write to the
18  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
19  * Boston, MA 02111-1307, USA.
20  */
21
22 #ifndef __GST_EBML_READ_H__
23 #define __GST_EBML_READ_H__
24
25 #include <gst/gst.h>
26
27 G_BEGIN_DECLS
28
29 #define GST_TYPE_EBML_READ \
30   (gst_ebml_read_get_type ())
31 #define GST_EBML_READ(obj) \
32   (G_TYPE_CHECK_INSTANCE_CAST ((obj), GST_TYPE_EBML_READ, GstEbmlRead))
33 #define GST_EBML_READ_CLASS(klass) \
34   (G_TYPE_CHECK_CLASS_CAST ((klass), GST_TYPE_EBML_READ, GstEbmlReadClass))
35 #define GST_IS_EBML_READ(obj) \
36   (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GST_TYPE_EBML_READ))
37 #define GST_IS_EBML_READ_CLASS(klass) \
38   (G_TYPE_CHECK_CLASS_TYPE ((klass), GST_TYPE_EBML_READ))
39 #define GST_EBML_READ_GET_CLASS(obj) \
40   (G_TYPE_INSTANCE_GET_CLASS ((obj), GST_TYPE_EBML_READ, GstEbmlReadClass))
41
42 typedef struct _GstEbmlLevel {
43   guint64 start;
44   guint64 length;
45 } GstEbmlLevel;
46
47 typedef struct _GstEbmlRead {
48   GstElement parent;
49
50   GstBuffer *cached_buffer;
51
52   GstPad *sinkpad;
53   guint64 offset;
54
55   GList *level;
56 } GstEbmlRead;
57
58 typedef struct _GstEbmlReadClass {
59   GstElementClass parent;
60 } GstEbmlReadClass;
61
62 GType    gst_ebml_read_get_type          (void);
63
64 void          gst_ebml_level_free        (GstEbmlLevel *level);
65
66 GstFlowReturn gst_ebml_peek_id           (GstEbmlRead *ebml,
67                                           guint       *level_up,
68                                           guint32     *id);
69
70 GstFlowReturn gst_ebml_read_seek         (GstEbmlRead *ebml,
71                                           guint64      offset);
72
73 gint64        gst_ebml_read_get_length   (GstEbmlRead *ebml);
74
75 GstFlowReturn gst_ebml_read_skip         (GstEbmlRead *ebml);
76
77 GstFlowReturn gst_ebml_read_buffer       (GstEbmlRead *ebml,
78                                           guint32     *id,
79                                           GstBuffer  **buf);
80
81 GstFlowReturn gst_ebml_read_uint         (GstEbmlRead *ebml,
82                                           guint32     *id,
83                                           guint64     *num);
84
85 GstFlowReturn gst_ebml_read_sint         (GstEbmlRead *ebml,
86                                           guint32     *id,
87                                           gint64      *num);
88
89 GstFlowReturn gst_ebml_read_float        (GstEbmlRead *ebml,
90                                           guint32     *id,
91                                           gdouble     *num);
92
93 GstFlowReturn gst_ebml_read_ascii        (GstEbmlRead *ebml,
94                                           guint32     *id,
95                                           gchar      **str);
96
97 GstFlowReturn gst_ebml_read_utf8         (GstEbmlRead *ebml,
98                                           guint32     *id,
99                                           gchar      **str);
100
101 GstFlowReturn gst_ebml_read_date         (GstEbmlRead *ebml,
102                                           guint32     *id,
103                                           gint64      *date);
104
105 GstFlowReturn gst_ebml_read_master       (GstEbmlRead *ebml,
106                                           guint32     *id);
107
108 GstFlowReturn gst_ebml_read_binary       (GstEbmlRead *ebml,
109                                           guint32     *id,
110                                           guint8     **binary,
111                                           guint64     *length);
112
113 GstFlowReturn gst_ebml_read_header       (GstEbmlRead *read,
114                                           gchar      **doctype,
115                                           guint       *version);
116
117 G_END_DECLS
118
119 #endif /* __GST_EBML_READ_H__ */