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Original commit message from CVS: * gst/audiofx/audiochebband.c: (gst_audio_cheb_band_class_init), (gst_audio_cheb_band_init), (gst_audio_cheb_band_finalize), (gst_audio_cheb_band_set_property): * gst/audiofx/audiochebband.h: * gst/audiofx/audiocheblimit.c: (gst_audio_cheb_limit_class_init), (gst_audio_cheb_limit_init), (gst_audio_cheb_limit_finalize), (gst_audio_cheb_limit_set_property): * gst/audiofx/audiocheblimit.h: * gst/audiofx/audiowsincband.c: (gst_audio_wsincband_class_init), (gst_audio_wsincband_init), (gst_audio_wsincband_finalize), (gst_audio_wsincband_set_property): * gst/audiofx/audiowsincband.h: * gst/audiofx/audiowsinclimit.c: (gst_audio_wsinclimit_class_init), (gst_audio_wsinclimit_init), (gst_audio_wsinclimit_finalize), (gst_audio_wsinclimit_set_property): * gst/audiofx/audiowsinclimit.h: Use a custom mutex for protecting the instance fields instead of the GstObject lock. Using the latter can lead to deadlocks, especially with the FIR filters when updating the latency.
80 lines
2.5 KiB
C
80 lines
2.5 KiB
C
/* -*- c-basic-offset: 2 -*-
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*
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* GStreamer
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* Copyright (C) 1999-2001 Erik Walthinsen <omega@cse.ogi.edu>
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* 2006 Dreamlab Technologies Ltd. <mathis.hofer@dreamlab.net>
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* 2007-2009 Sebastian Dröge <sebastian.droege@collabora.co.uk>
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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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*
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* this windowed sinc filter is taken from the freely downloadable DSP book,
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* "The Scientist and Engineer's Guide to Digital Signal Processing",
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* chapter 16
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* available at http://www.dspguide.com/
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*
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*/
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#ifndef __GST_AUDIO_WSINC_BAND_H__
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#define __GST_AUDIO_WSINC_BAND_H__
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#include <gst/gst.h>
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#include <gst/audio/gstaudiofilter.h>
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#include "audiofxbasefirfilter.h"
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G_BEGIN_DECLS
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#define GST_TYPE_AUDIO_WSINC_BAND \
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(gst_audio_wsincband_get_type())
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#define GST_AUDIO_WSINC_BAND(obj) \
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(G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_AUDIO_WSINC_BAND,GstAudioWSincBand))
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#define GST_AUDIO_WSINC_BAND_CLASS(klass) \
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(G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_AUDIO_WSINC_BAND,GstAudioWSincBandClass))
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#define GST_IS_AUDIO_WSINC_BAND(obj) \
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(G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_AUDIO_WSINC_BAND))
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#define GST_IS_AUDIO_WSINC_BAND_CLASS(klass) \
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(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_AUDIO_WSINC_BAND))
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typedef struct _GstAudioWSincBand GstAudioWSincBand;
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typedef struct _GstAudioWSincBandClass GstAudioWSincBandClass;
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/**
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* GstAudioWSincBand:
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*
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* Opaque data structure.
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*/
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struct _GstAudioWSincBand {
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GstAudioFXBaseFIRFilter parent;
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gint mode;
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gint window;
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gfloat lower_frequency, upper_frequency;
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gint kernel_length; /* length of the filter kernel */
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/* < private > */
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GMutex *lock;
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};
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struct _GstAudioWSincBandClass {
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GstAudioFilterClass parent;
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};
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GType gst_audio_wsincband_get_type (void);
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G_END_DECLS
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#endif /* __GST_AUDIO_WSINC_BAND_H__ */
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