author | Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com> |
Fri, 16 Apr 2010 15:15:52 +0300 | |
changeset 8 | 4a7fac7dd34a |
permissions | -rw-r--r-- |
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/* |
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* GStreamer |
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* Copyright (C) 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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#ifndef __GST_AUDIO_FX_BASE_IIR_FILTER_H__ |
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#define __GST_AUDIO_FX_BASE_IIR_FILTER_H__ |
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#include <gst/gst.h> |
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#include <gst/gst_global.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_FX_BASE_IIR_FILTER (gst_audio_fx_base_iir_filter_get_type()) |
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#define GST_AUDIO_FX_BASE_IIR_FILTER(obj) (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_AUDIO_FX_BASE_IIR_FILTER,GstAudioFXBaseIIRFilter)) |
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#define GST_IS_AUDIO_FX_BASE_IIR_FILTER(obj) (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_AUDIO_FX_BASE_IIR_FILTER)) |
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#define GST_AUDIO_FX_BASE_IIR_FILTER_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST((klass) ,GST_TYPE_AUDIO_FX_BASE_IIR_FILTER,GstAudioFXBaseIIRFilterClass)) |
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#define GST_IS_AUDIO_FX_BASE_IIR_FILTER_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE((klass) ,GST_TYPE_AUDIO_FX_BASE_IIR_FILTER)) |
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#define GST_AUDIO_FX_BASE_IIR_FILTER_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS((obj) ,GST_TYPE_AUDIO_FX_BASE_IIR_FILTER,GstAudioFXBaseIIRFilterClass)) |
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typedef struct _GstAudioFXBaseIIRFilter GstAudioFXBaseIIRFilter; |
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typedef struct _GstAudioFXBaseIIRFilterClass GstAudioFXBaseIIRFilterClass; |
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typedef void (*GstAudioFXBaseIIRFilterProcessFunc) (GstAudioFXBaseIIRFilter *, 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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} GstAudioFXBaseIIRFilterChannelCtx; |
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struct _GstAudioFXBaseIIRFilter |
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{ |
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GstAudioFilter audiofilter; |
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/* < private > */ |
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GstAudioFXBaseIIRFilterProcessFunc process; |
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gboolean have_coeffs; |
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gdouble *a; |
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guint na; |
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gdouble *b; |
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guint nb; |
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GstAudioFXBaseIIRFilterChannelCtx *channels; |
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guint nchannels; |
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}; |
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struct _GstAudioFXBaseIIRFilterClass |
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{ |
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GstAudioFilterClass parent; |
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}; |
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#ifdef __SYMBIAN32__ |
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IMPORT_C |
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#endif |
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GType gst_audio_fx_base_iir_filter_get_type (void); |
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void gst_audio_fx_base_iir_filter_set_coefficients (GstAudioFXBaseIIRFilter *filter, gdouble *a, guint na, gdouble *b, guint nb); |
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gdouble gst_audio_fx_base_iir_filter_calculate_gain (gdouble *a, guint na, gdouble *b, guint nb, gdouble zr, gdouble zi); |
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G_END_DECLS |
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#endif /* __GST_AUDIO_FX_BASE_IIR_FILTER_H__ */ |