gst-plugins-good  1.20.3
About: GStreamer (Good Plugins) is a library for constructing of graphs of media-handling components. A set of good-quality plug-ins (under LGPL license).
  Fossies Dox: gst-plugins-good-1.20.3.tar.xz  ("unofficial" and yet experimental doxygen-generated source code documentation)  

audiofxbaseiirfilter.h
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1/*
2 * GStreamer
3 * Copyright (C) 2007-2009 Sebastian Dröge <sebastian.droege@collabora.co.uk>
4 *
5 * This library is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU Library General Public
7 * License as published by the Free Software Foundation; either
8 * version 2 of the License, or (at your option) any later version.
9 *
10 * This library is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * Library General Public License for more details.
14 *
15 * You should have received a copy of the GNU Library General Public
16 * License along with this library; if not, write to the
17 * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
18 * Boston, MA 02110-1301, USA.
19 */
20
21#ifndef __GST_AUDIO_FX_BASE_IIR_FILTER_H__
22#define __GST_AUDIO_FX_BASE_IIR_FILTER_H__
23
24#include <gst/gst.h>
25#include <gst/base/gstbasetransform.h>
26#include <gst/audio/audio.h>
27#include <gst/audio/gstaudiofilter.h>
28
29G_BEGIN_DECLS
30
31#define GST_TYPE_AUDIO_FX_BASE_IIR_FILTER (gst_audio_fx_base_iir_filter_get_type())
32#define GST_AUDIO_FX_BASE_IIR_FILTER(obj) (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_AUDIO_FX_BASE_IIR_FILTER,GstAudioFXBaseIIRFilter))
33#define GST_IS_AUDIO_FX_BASE_IIR_FILTER(obj) (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_AUDIO_FX_BASE_IIR_FILTER))
34#define GST_AUDIO_FX_BASE_IIR_FILTER_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST((klass) ,GST_TYPE_AUDIO_FX_BASE_IIR_FILTER,GstAudioFXBaseIIRFilterClass))
35#define GST_IS_AUDIO_FX_BASE_IIR_FILTER_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE((klass) ,GST_TYPE_AUDIO_FX_BASE_IIR_FILTER))
36#define GST_AUDIO_FX_BASE_IIR_FILTER_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS((obj) ,GST_TYPE_AUDIO_FX_BASE_IIR_FILTER,GstAudioFXBaseIIRFilterClass))
39
41
42typedef struct
43{
44 gdouble *x;
45 gint x_pos;
46 gdouble *y;
47 gint y_pos;
49
51{
52 GstAudioFilter audiofilter;
53
54 /* < private > */
56
57 gdouble *a;
58 guint na;
59 gdouble *b;
60 guint nb;
62 guint nchannels;
63
64 GMutex lock;
65};
66
68{
69 GstAudioFilterClass parent;
70};
71
73void gst_audio_fx_base_iir_filter_set_coefficients (GstAudioFXBaseIIRFilter *filter, gdouble *a, guint na, gdouble *b, guint nb);
74gdouble gst_audio_fx_base_iir_filter_calculate_gain (gdouble *a, guint na, gdouble *b, guint nb, gdouble zr, gdouble zi);
75
76G_END_DECLS
77
78#endif /* __GST_AUDIO_FX_BASE_IIR_FILTER_H__ */
GType gst_audio_fx_base_iir_filter_get_type(void)
gdouble gst_audio_fx_base_iir_filter_calculate_gain(gdouble *a, guint na, gdouble *b, guint nb, gdouble zr, gdouble zi)
void(* GstAudioFXBaseIIRFilterProcessFunc)(GstAudioFXBaseIIRFilter *, guint8 *, guint)
void gst_audio_fx_base_iir_filter_set_coefficients(GstAudioFXBaseIIRFilter *filter, gdouble *a, guint na, gdouble *b, guint nb)
GstAudioFXBaseIIRFilterProcessFunc process
GstAudioFXBaseIIRFilterChannelCtx * channels