2 * Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
4 * This library is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Library General Public
6 * License as published by the Free Software Foundation; either
7 * version 2 of the License, or (at your option) any later version.
9 * This library is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Library General Public License for more details.
14 * You should have received a copy of the GNU Library General Public
15 * License along with this library; if not, write to the
16 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
17 * Boston, MA 02111-1307, USA.
21 #ifndef __GST_AUDIO_FILTER_H__
22 #define __GST_AUDIO_FILTER_H__
25 #include <gst/base/gstbasetransform.h>
26 #include <gst/audio/gstringbuffer.h>
30 typedef struct _GstAudioFilter GstAudioFilter;
31 typedef struct _GstAudioFilterClass GstAudioFilterClass;
33 #define GST_TYPE_AUDIO_FILTER \
34 (gst_audio_filter_get_type())
35 #define GST_AUDIO_FILTER(obj) \
36 (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_AUDIO_FILTER,GstAudioFilter))
37 #define GST_AUDIO_FILTER_CAST(obj) \
38 ((GstAudioFilter *) (obj))
39 #define GST_AUDIO_FILTER_CLASS(klass) \
40 (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_AUDIO_FILTER,GstAudioFilterClass))
41 #define GST_AUDIO_FILTER_CLASS_CAST(klass) \
42 ((GstAudioFilterClass *) (klass))
43 #define GST_IS_AUDIO_FILTER(obj) \
44 (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_AUDIO_FILTER))
45 #define GST_IS_AUDIO_FILTER_CLASS(klass) \
46 (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_AUDIO_FILTER))
51 * Base class for audio filters with the same format for input and output.
55 struct _GstAudioFilter {
56 GstBaseTransform basetransform;
59 GstRingBufferSpec format; /* currently configured format */
62 gpointer _gst_reserved[GST_PADDING];
66 * GstAudioFilterClass:
67 * @basetransformclass: parent class
68 * @setup: virtual function called whenever the format changes
70 * In addition to the @setup virtual function, you should also override the
71 * GstBaseTransform::transform and/or GstBaseTransform::transform_ip virtual
77 struct _GstAudioFilterClass {
78 GstBaseTransformClass basetransformclass;
80 /* virtual function, called whenever the format changes */
81 gboolean (*setup) (GstAudioFilter * filter, GstRingBufferSpec * format);
84 gpointer _gst_reserved[GST_PADDING];
87 GType gst_audio_filter_get_type (void);
89 void gst_audio_filter_class_add_pad_templates (GstAudioFilterClass * klass,
90 const GstCaps * allowed_caps);
94 #endif /* __GST_AUDIO_FILTER_H__ */