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/* GStreamer
* Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
*
* 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.
*/
#ifndef __GST_SPECTRUM_H__
#define __GST_SPECTRUM_H__
#include <gst/gst.h>
#include <gst/base/gstadapter.h>
#include <gst/base/gstbasetransform.h>
#include <gst/audio/gstaudiofilter.h>
#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */
#define GST_TYPE_SPECTRUM (gst_spectrum_get_type())
#define GST_SPECTRUM(obj) (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_SPECTRUM,GstSpectrum))
#define GST_IS_SPECTRUM(obj) (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_SPECTRUM))
#define GST_SPECTRUM_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST((klass), GST_TYPE_SPECTRUM,GstSpectrumClass))
#define GST_IS_SPECTRUM_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE((klass), GST_TYPE_SPECTRUM))
typedef struct _GstSpectrum GstSpectrum;
typedef struct _GstSpectrumClass GstSpectrumClass;
typedef void (*GstSpectrumProcessFunc) (GstSpectrum *, const guint8 *);
typedef void (*GstSpectrumFFTFreeFunc) (void *);
struct _GstSpectrum {
GstAudioFilter element;
GstPad *sinkpad,*srcpad;
GstAdapter *adapter;
/* properties */
gboolean message; /* whether or not to post messages */
gboolean message_magnitude;
gboolean message_phase;
guint64 interval; /* how many seconds between emits */
guint bands; /* number of spectrum bands */
gint threshold; /* energy level treshold */
gint num_frames; /* frame count (1 sample per channel)
* since last emit */
gint num_fft; /* number of FFTs since last emit */
/* <private> */
gfloat *spect_magnitude;
gfloat *spect_phase;
GstSpectrumProcessFunc process;
void *fft_ctx;
GstSpectrumFFTFreeFunc fft_free_func;
void *in;
void *freqdata;
};
struct _GstSpectrumClass {
GstAudioFilterClass parent_class;
};
GType gst_spectrum_get_type (void);
#ifdef __cplusplus
}
#endif /* __cplusplus */
#endif /* __GST_SPECTRUM_H__ */
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