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79 lines
2.7 KiB
C
79 lines
2.7 KiB
C
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/*
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* GStreamer
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* Copyright (C) 2007 Sebastian Dröge <slomo@circular-chaos.org>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#ifndef __GST_AUDIO_CHEBYSHEV_FREQ_LIMIT_H__
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#define __GST_AUDIO_CHEBYSHEV_FREQ_LIMIT_H__
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#include <gst/gst.h>
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#include <gst/base/gstbasetransform.h>
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#include <gst/audio/audio.h>
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#include <gst/audio/gstaudiofilter.h>
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G_BEGIN_DECLS
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#define GST_TYPE_AUDIO_CHEBYSHEV_FREQ_LIMIT (gst_audio_chebyshev_freq_limit_get_type())
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#define GST_AUDIO_CHEBYSHEV_FREQ_LIMIT(obj) (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_AUDIO_CHEBYSHEV_FREQ_LIMIT,GstAudioChebyshevFreqLimit))
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#define GST_IS_AUDIO_CHEBYSHEV_FREQ_LIMIT(obj) (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_AUDIO_CHEBYSHEV_FREQ_LIMIT))
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#define GST_AUDIO_CHEBYSHEV_FREQ_LIMIT_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST((klass) ,GST_TYPE_AUDIO_CHEBYSHEV_FREQ_LIMIT,GstAudioChebyshevFreqLimitClass))
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#define GST_IS_AUDIO_CHEBYSHEV_FREQ_LIMIT_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE((klass) ,GST_TYPE_AUDIO_CHEBYSHEV_FREQ_LIMIT))
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#define GST_AUDIO_CHEBYSHEV_FREQ_LIMIT_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS((obj) ,GST_TYPE_AUDIO_CHEBYSHEV_FREQ_LIMIT,GstAudioChebyshevFreqLimitClass))
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typedef struct _GstAudioChebyshevFreqLimit GstAudioChebyshevFreqLimit;
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typedef struct _GstAudioChebyshevFreqLimitClass GstAudioChebyshevFreqLimitClass;
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typedef void (*GstAudioChebyshevFreqLimitProcessFunc) (GstAudioChebyshevFreqLimit *, guint8 *, guint);
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typedef struct
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{
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gdouble *x;
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gint x_pos;
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gdouble *y;
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gint y_pos;
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} GstAudioChebyshevFreqLimitChannelCtx;
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struct _GstAudioChebyshevFreqLimit
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{
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GstAudioFilter audiofilter;
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gint mode;
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gint type;
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gint poles;
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gfloat cutoff;
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gfloat ripple;
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/* < private > */
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GstAudioChebyshevFreqLimitProcessFunc process;
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gboolean have_coeffs;
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gdouble *a;
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gint num_a;
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gdouble *b;
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gint num_b;
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GstAudioChebyshevFreqLimitChannelCtx *channels;
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};
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struct _GstAudioChebyshevFreqLimitClass
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{
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GstAudioFilterClass parent;
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};
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GType gst_audio_chebyshev_freq_limit_get_type (void);
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G_END_DECLS
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#endif /* __GST_AUDIO_CHEBYSHEV_FREQ_LIMIT_H__ */
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