1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
|
/* GStreamer
* Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
* Copyright (C) <2006> Nokia Corporation (contact <stefan.kost@nokia.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 __GST_AVI_DEMUX_H__
#define __GST_AVI_DEMUX_H__
#include <gst/gst.h>
#include "avi-ids.h"
#include "gst/riff/riff-ids.h"
#include "gst/riff/riff-read.h"
#include <gst/base/gstadapter.h>
G_BEGIN_DECLS
#define GST_TYPE_AVI_DEMUX \
(gst_avi_demux_get_type ())
#define GST_AVI_DEMUX(obj) \
(G_TYPE_CHECK_INSTANCE_CAST ((obj), GST_TYPE_AVI_DEMUX, GstAviDemux))
#define GST_AVI_DEMUX_CLASS(klass) \
(G_TYPE_CHECK_CLASS_CAST ((klass), GST_TYPE_AVI_DEMUX, GstAviDemuxClass))
#define GST_IS_AVI_DEMUX(obj) \
(G_TYPE_CHECK_INSTANCE_TYPE ((obj), GST_TYPE_AVI_DEMUX))
#define GST_IS_AVI_DEMUX_CLASS(klass) \
(G_TYPE_CHECK_CLASS_TYPE ((klass), GST_TYPE_AVI_DEMUX))
#define GST_AVI_DEMUX_MAX_STREAMS 16
#define CHUNKID_TO_STREAMNR(chunkid) \
((((chunkid) & 0xff) - '0') * 10 + \
(((chunkid) >> 8) & 0xff) - '0')
#define GST_AVI_INDEX_ENTRY_FLAG_KEYFRAME 1
/* 48 bytes */
typedef struct {
guint index_nr; /* = (entry-index_entries)/sizeof(gst_avi_index_entry); */
guchar stream_nr;
guchar flags;
guint64 ts;
guint64 dur; /* =entry[1].ts-entry->ts */
guint64 offset;
guint64 bytes_before; /* calculated */
guint32 frames_before; /* calculated */
guint32 size; /* could be read from the chunk (if we don't split) */
} gst_avi_index_entry;
typedef struct {
/* index of this streamcontext */
guint num;
/* pad*/
GstPad *pad;
/* stream info and headers */
gst_riff_strh *strh;
union {
gst_riff_strf_vids *vids;
gst_riff_strf_auds *auds;
gst_riff_strf_iavs *iavs;
gpointer data;
} strf;
GstBuffer *extradata, *initdata;
gchar *name;
/* current position (byte, frame, time) and other status vars */
guint current_frame;
guint64 current_byte;
GstFlowReturn last_flow;
gboolean discont;
/* stream length */
guint64 total_bytes;
guint32 total_frames;
guint32 total_blocks;
/* stream length according to index */
GstClockTime idx_duration;
/* stream length according to header */
GstClockTime hdr_duration;
/* stream length based on header/index */
GstClockTime duration;
/* VBR indicator */
gboolean is_vbr;
/* openDML support (for files >4GB) */
gboolean superindex;
guint64 *indexes;
GstTagList *taglist;
} avi_stream_context;
typedef enum {
GST_AVI_DEMUX_START,
GST_AVI_DEMUX_HEADER,
GST_AVI_DEMUX_MOVI,
} GstAviDemuxState;
typedef enum {
GST_AVI_DEMUX_HEADER_TAG_LIST,
GST_AVI_DEMUX_HEADER_AVIH,
GST_AVI_DEMUX_HEADER_ELEMENTS,
GST_AVI_DEMUX_HEADER_INFO,
GST_AVI_DEMUX_HEADER_JUNK,
GST_AVI_DEMUX_HEADER_DATA
} GstAviDemuxHeaderState;
typedef struct _GstAviDemux {
GstElement parent;
/* pads */
GstPad *sinkpad;
/* AVI decoding state */
GstAviDemuxState state;
GstAviDemuxHeaderState header_state;
guint64 offset;
/* index */
gst_avi_index_entry *index_entries;
guint index_size;
guint64 index_offset;
guint current_entry;
guint reverse_start_index;
guint reverse_stop_index;
/* streams */
guint num_streams;
guint num_v_streams;
guint num_a_streams;
guint num_t_streams; /* subtitle text streams */
avi_stream_context stream[GST_AVI_DEMUX_MAX_STREAMS];
/* for streaming mode */
gboolean streaming;
gboolean have_eos;
GstAdapter *adapter;
/* some stream info for length */
gst_riff_avih *avih;
/* segment in TIME */
GstSegment segment;
gboolean segment_running;
/* pending tags/events */
GstEvent *seek_event;
GstTagList *globaltags;
gboolean got_tags;
} GstAviDemux;
typedef struct _GstAviDemuxClass {
GstElementClass parent_class;
} GstAviDemuxClass;
GType gst_avi_demux_get_type (void);
G_END_DECLS
#endif /* __GST_AVI_DEMUX_H__ */
|