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/audio.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 GstAudioInfo info; /* currently configured format */
62 gpointer _gst_reserved[GST_PADDING];
65 #define GST_AUDIO_FILTER_INFO(filter) (&GST_AUDIO_FILTER_CAST(filter)->info)
67 #define GST_AUDIO_FILTER_FORMAT(filter) (GST_AUDIO_INFO_FORMAT(GST_AUDIO_FILTER_INFO(filter)))
68 #define GST_AUDIO_FILTER_RATE(filter) (GST_AUDIO_INFO_RATE(GST_AUDIO_FILTER_INFO(filter)))
69 #define GST_AUDIO_FILTER_CHANNELS(filter) (GST_AUDIO_INFO_CHANNELS(GST_AUDIO_FILTER_INFO(filter)))
70 #define GST_AUDIO_FILTER_BPF(filter) (GST_AUDIO_INFO_BPF(GST_AUDIO_FILTER_INFO(filter)))
71 #define GST_AUDIO_FILTER_BPS(filter) (GST_AUDIO_INFO_BPS(GST_AUDIO_FILTER_INFO(filter)))
74 * GstAudioFilterClass:
75 * @basetransformclass: parent class
76 * @setup: virtual function called whenever the format changes
78 * In addition to the @setup virtual function, you should also override the
79 * GstBaseTransform::transform and/or GstBaseTransform::transform_ip virtual
85 struct _GstAudioFilterClass {
86 GstBaseTransformClass basetransformclass;
88 /* virtual function, called whenever the format changes */
89 gboolean (*setup) (GstAudioFilter * filter, const GstAudioInfo * info);
92 gpointer _gst_reserved[GST_PADDING];
95 GType gst_audio_filter_get_type (void);
97 void gst_audio_filter_class_add_pad_templates (GstAudioFilterClass * klass,
98 GstCaps * allowed_caps);
102 #endif /* __GST_AUDIO_FILTER_H__ */