mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-11-25 03:01:03 +00:00
80 lines
2.5 KiB
C
80 lines
2.5 KiB
C
/* -*- c-basic-offset: 2 -*-
|
|
*
|
|
* GStreamer
|
|
* Copyright (C) 1999-2001 Erik Walthinsen <omega@cse.ogi.edu>
|
|
* 2006 Dreamlab Technologies Ltd. <mathis.hofer@dreamlab.net>
|
|
* 2007-2009 Sebastian Dröge <sebastian.droege@collabora.co.uk>
|
|
*
|
|
* 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.
|
|
*
|
|
*
|
|
* this windowed sinc filter is taken from the freely downloadable DSP book,
|
|
* "The Scientist and Engineer's Guide to Digital Signal Processing",
|
|
* chapter 16
|
|
* available at http://www.dspguide.com/
|
|
*
|
|
*/
|
|
|
|
#ifndef __GST_AUDIO_WSINC_BAND_H__
|
|
#define __GST_AUDIO_WSINC_BAND_H__
|
|
|
|
#include <gst/gst.h>
|
|
#include <gst/audio/gstaudiofilter.h>
|
|
|
|
#include "audiofxbasefirfilter.h"
|
|
|
|
G_BEGIN_DECLS
|
|
|
|
#define GST_TYPE_AUDIO_WSINC_BAND \
|
|
(gst_audio_wsincband_get_type())
|
|
#define GST_AUDIO_WSINC_BAND(obj) \
|
|
(G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_AUDIO_WSINC_BAND,GstAudioWSincBand))
|
|
#define GST_AUDIO_WSINC_BAND_CLASS(klass) \
|
|
(G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_AUDIO_WSINC_BAND,GstAudioWSincBandClass))
|
|
#define GST_IS_AUDIO_WSINC_BAND(obj) \
|
|
(G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_AUDIO_WSINC_BAND))
|
|
#define GST_IS_AUDIO_WSINC_BAND_CLASS(klass) \
|
|
(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_AUDIO_WSINC_BAND))
|
|
|
|
typedef struct _GstAudioWSincBand GstAudioWSincBand;
|
|
typedef struct _GstAudioWSincBandClass GstAudioWSincBandClass;
|
|
|
|
/**
|
|
* GstAudioWSincBand:
|
|
*
|
|
* Opaque data structure.
|
|
*/
|
|
struct _GstAudioWSincBand {
|
|
GstAudioFXBaseFIRFilter parent;
|
|
|
|
gint mode;
|
|
gint window;
|
|
gfloat lower_frequency, upper_frequency;
|
|
gint kernel_length; /* length of the filter kernel */
|
|
|
|
/* < private > */
|
|
GMutex lock;
|
|
};
|
|
|
|
struct _GstAudioWSincBandClass {
|
|
GstAudioFilterClass parent;
|
|
};
|
|
|
|
GType gst_audio_wsincband_get_type (void);
|
|
|
|
G_END_DECLS
|
|
|
|
#endif /* __GST_AUDIO_WSINC_BAND_H__ */
|