73 lines
2.0 KiB
C
73 lines
2.0 KiB
C
/* GStreamer FFTW-based signal-to-spectrum converter
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* Copyright (C) 2006 Joseph Rabinoff <bobqwatson@yahoo.com>
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*/
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/***************************************************************************
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* *
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* This program is free software; you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation; either version 2 of the License, or *
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* (at your option) any later version. *
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* *
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***************************************************************************/
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#ifndef __GST_FFTWSPECTRUM_H__
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#define __GST_FFTWSPECTRUM_H__
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#include <gst/gst.h>
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#include <fftw3.h>
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G_BEGIN_DECLS
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/* #defines don't like whitespacey bits */
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#define GST_TYPE_FFTWSPECTRUM \
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(gst_fftwspectrum_get_type())
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#define GST_FFTWSPECTRUM(obj) \
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(G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_FFTWSPECTRUM,GstFFTWSpectrum))
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#define GST_FFTWSPECTRUM_CLASS(klass) \
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(G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_FFTWSPECTRUM,GstFFTWSpectrumClass))
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typedef struct _GstFFTWSpectrum GstFFTWSpectrum;
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typedef struct _GstFFTWSpectrumClass GstFFTWSpectrumClass;
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struct _GstFFTWSpectrum
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{
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GstElement element;
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GstPad *sinkpad, *srcpad;
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/* Stream data */
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gint rate, size, step;
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/* Actual queued (incoming) stream */
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gdouble *samples;
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gint numsamples;
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GstClockTime timestamp; /* Timestamp of the first sample */
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guint64 offset; /* Offset of the first sample */
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/* State data for fftw */
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double *fftw_in;
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double *fftw_out;
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fftw_plan fftw_plan;
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/* Properties */
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gint32 def_size, def_step;
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gboolean hi_q;
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GMutex* mutex;
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};
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struct _GstFFTWSpectrumClass
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{
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GstElementClass parent_class;
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GMutex mutex;
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};
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GType gst_fftwspectrum_get_type (void);
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G_END_DECLS
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#endif /* __GST_FFTWSPECTRUM_H__ */
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