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
|
/* GStreamer
* Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
* 2000 Wim Taymans <wtay@chello.be>
*
* gstbin.h: Header for GstBin container object
*
* 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_BIN_H__
#define __GST_BIN_H__
#include <gst/gstelement.h>
#include <gst/cothreads.h>
#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */
extern GstElementDetails gst_bin_details;
extern GType _gst_bin_type;
#define GST_TYPE_BIN (_gst_bin_type)
# define GST_IS_BIN(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GST_TYPE_BIN))
# define GST_IS_BIN_CLASS(obj) (G_TYPE_CHECK_CLASS_TYPE ((klass), GST_TYPE_BIN))
#define GST_BIN_FAST(obj) ((GstBin*)(obj))
#define GST_BIN_CLASS_FAST(klass) ((GstBinClass*)(klass))
#ifdef GST_TYPE_PARANOID
# define GST_BIN(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), GST_TYPE_BIN, GstBin))
# define GST_BIN_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), GST_TYPE_BIN, GstBinClass))
#else
# define GST_BIN GST_BIN_FAST
# define GST_BIN_CLASS GST_BIN_CLASS_FAST
#endif
typedef enum {
/* this bin is a manager of child elements, i.e. a pipeline or thread */
GST_BIN_FLAG_MANAGER = GST_ELEMENT_FLAG_LAST,
/* this bin is actually a meta-bin, and may need to be scheduled */
GST_BIN_SELF_SCHEDULABLE,
/* we prefer to have cothreads when its an option, over chain-based */
GST_BIN_FLAG_PREFER_COTHREADS,
/* padding */
GST_BIN_FLAG_LAST = GST_ELEMENT_FLAG_LAST + 4,
} GstBinFlags;
//typedef struct _GstBin GstBin;
//typedef struct _GstBinClass GstBinClass;
typedef struct __GstBinChain _GstBinChain;
struct _GstBin {
GstElement element;
/* our children */
gint numchildren;
GList *children;
gint num_eos_providers;
GList *eos_providers;
GCond *eoscond;
/* iteration state */
gboolean need_cothreads;
GList *managed_elements;
gint num_managed_elements;
GList *chains;
gint num_chains;
GList *entries;
gint num_entries;
cothread_context *threadcontext;
};
struct _GstBinClass {
GstElementClass parent_class;
/* signals */
void (*object_added) (GstObject *object, GstObject *child);
void (*object_removed) (GstObject *object, GstObject *child);
/* change the state of elements of the given type */
gboolean (*change_state_type) (GstBin *bin,
GstElementState state,
GType type);
/* run a full iteration of operation */
gboolean (*iterate) (GstBin *bin);
};
struct __GstBinChain {
GList *elements;
gint num_elements;
GList *entries;
gboolean need_cothreads;
gboolean need_scheduling;
};
GType gst_bin_get_type (void);
GstElement* gst_bin_new (const gchar *name);
#define gst_bin_destroy(bin) gst_object_destroy(GST_OBJECT(bin))
/* add and remove elements from the bin */
void gst_bin_add (GstBin *bin,
GstElement *element);
void gst_bin_remove (GstBin *bin,
GstElement *element);
/* retrieve a single element or the list of children */
GstElement* gst_bin_get_by_name (GstBin *bin,
const gchar *name);
GstElement* gst_bin_get_by_name_recurse_up (GstBin *bin,
const gchar *name);
GList* gst_bin_get_list (GstBin *bin);
gboolean gst_bin_set_state_type (GstBin *bin,
GstElementState state,
GType type);
gboolean gst_bin_iterate (GstBin *bin);
#ifdef __cplusplus
}
#endif /* __cplusplus */
#endif /* __GST_BIN_H__ */
|
