/* -*- 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 <gst/gst_global.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;

};

#ifdef __SYMBIAN32__

IMPORT_C

#endif

GType gst_audio_wsincband_get_type (void);

G_END_DECLS

#endif /* __GST_AUDIO_WSINC_BAND_H__ */