2 * Copyright (C) 2009 Axis Communications <dev-gstreamer at axis dot com>
3 * @author Jonas Holmberg <jonas dot holmberg at axis dot com>
5 * gstbufferlist.h: Header for GstBufferList object
7 * This library is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Library General Public
9 * License as published by the Free Software Foundation; either
10 * version 2 of the License, or (at your option) any later version.
12 * This library is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Library General Public License for more details.
17 * You should have received a copy of the GNU Library General Public
18 * License along with this library; if not, write to the
19 * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
20 * Boston, MA 02110-1301, USA.
23 #ifndef __GST_BUFFER_LIST_H__
24 #define __GST_BUFFER_LIST_H__
26 #include <gst/gstbuffer.h>
30 GST_EXPORT GType _gst_buffer_list_type;
32 #define GST_TYPE_BUFFER_LIST (_gst_buffer_list_type)
33 #define GST_IS_BUFFER_LIST(obj) (GST_IS_MINI_OBJECT_TYPE(obj, GST_TYPE_BUFFER_LIST))
34 #define GST_BUFFER_LIST_CAST(obj) ((GstBufferList *)obj)
35 #define GST_BUFFER_LIST(obj) (GST_BUFFER_LIST_CAST(obj))
37 typedef struct _GstBufferList GstBufferList;
41 * @buffer: (out) (nullable): pointer the buffer
42 * @idx: the index of @buffer
43 * @user_data: user data passed to gst_buffer_list_foreach()
45 * A function that will be called from gst_buffer_list_foreach(). The @buffer
46 * field will point to a the reference of the buffer at @idx.
48 * When this function returns %TRUE, the next buffer will be
49 * returned. When %FALSE is returned, gst_buffer_list_foreach() will return.
51 * When @buffer is set to %NULL, the item will be removed from the bufferlist.
52 * When @buffer has been made writable, the new buffer reference can be assigned
53 * to @buffer. This function is responsible for unreffing the old buffer when
54 * removing or modifying.
56 * Returns: %FALSE when gst_buffer_list_foreach() should stop
58 typedef gboolean (*GstBufferListFunc) (GstBuffer **buffer, guint idx,
64 * gst_buffer_list_ref:
65 * @list: a #GstBufferList
67 * Increases the refcount of the given buffer list by one.
69 * Note that the refcount affects the writability of @list and its data, see
70 * gst_buffer_list_make_writable(). It is important to note that keeping
71 * additional references to GstBufferList instances can potentially increase
72 * the number of memcpy operations in a pipeline.
74 * Returns: (transfer full): @list
77 G_INLINE_FUNC GstBufferList * gst_buffer_list_ref (GstBufferList * list);
80 static inline GstBufferList *
81 gst_buffer_list_ref (GstBufferList * list)
83 return GST_BUFFER_LIST_CAST (gst_mini_object_ref (GST_MINI_OBJECT_CAST (
88 * gst_buffer_list_unref:
89 * @list: (transfer full): a #GstBufferList
91 * Decreases the refcount of the buffer list. If the refcount reaches 0, the
92 * buffer list will be freed.
95 G_INLINE_FUNC void gst_buffer_list_unref (GstBufferList * list);
99 gst_buffer_list_unref (GstBufferList * list)
101 gst_mini_object_unref (GST_MINI_OBJECT_CAST (list));
106 * gst_buffer_list_copy:
107 * @list: a #GstBufferList
109 * Create a shallow copy of the given buffer list. This will make a newly
110 * allocated copy of the source list with copies of buffer pointers. The
111 * refcount of buffers pointed to will be increased by one.
113 * Returns: (transfer full): a new copy of @list.
115 #ifdef _FOOL_GTK_DOC_
116 G_INLINE_FUNC GstBufferList * gst_buffer_list_copy (const GstBufferList * list);
119 static inline GstBufferList *
120 gst_buffer_list_copy (const GstBufferList * list)
122 return GST_BUFFER_LIST_CAST (gst_mini_object_copy (GST_MINI_OBJECT_CONST_CAST (list)));
126 * gst_buffer_list_is_writable:
127 * @list: a #GstBufferList
129 * Tests if you can safely add buffers and groups into a buffer list.
131 #define gst_buffer_list_is_writable(list) gst_mini_object_is_writable (GST_MINI_OBJECT_CAST (list))
134 * gst_buffer_list_make_writable:
135 * @list: (transfer full): a #GstBufferList
137 * Makes a writable buffer list from the given buffer list. If the source buffer
138 * list is already writable, this will simply return the same buffer list. A
139 * copy will otherwise be made using gst_buffer_list_copy().
141 * Returns: (transfer full): a writable list, which may or may not be the
144 #define gst_buffer_list_make_writable(list) GST_BUFFER_LIST_CAST (gst_mini_object_make_writable (GST_MINI_OBJECT_CAST (list)))
146 GType gst_buffer_list_get_type (void);
149 GstBufferList * gst_buffer_list_new (void) G_GNUC_MALLOC;
150 GstBufferList * gst_buffer_list_new_sized (guint size) G_GNUC_MALLOC;
152 guint gst_buffer_list_length (GstBufferList *list);
154 GstBuffer * gst_buffer_list_get (GstBufferList *list, guint idx);
155 void gst_buffer_list_insert (GstBufferList *list, gint idx, GstBuffer *buffer);
156 void gst_buffer_list_remove (GstBufferList *list, guint idx, guint length);
158 gboolean gst_buffer_list_foreach (GstBufferList *list,
159 GstBufferListFunc func,
161 GstBufferList * gst_buffer_list_copy_deep (const GstBufferList * list);
163 #define gst_buffer_list_add(l,b) gst_buffer_list_insert((l),-1,(b));
167 #endif /* __GST_BUFFER_LIST_H__ */