2 * Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
4 * This library is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Library General Public
6 * License as published by the Free Software Foundation; either
7 * version 2 of the License, or (at your option) any later version.
9 * This library is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Library General Public License for more details.
14 * You should have received a copy of the GNU Library General Public
15 * License along with this library; if not, write to the
16 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
17 * Boston, MA 02111-1307, USA.
21 #ifndef __GST_SPECTRUM_H__
22 #define __GST_SPECTRUM_H__
26 #include <gst/base/gstadapter.h>
27 #include <gst/base/gstbasetransform.h>
28 #include <gst/audio/gstaudiofilter.h>
32 #endif /* __cplusplus */
35 #define GST_TYPE_SPECTRUM (gst_spectrum_get_type())
36 #define GST_SPECTRUM(obj) (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_SPECTRUM,GstSpectrum))
37 #define GST_IS_SPECTRUM(obj) (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_SPECTRUM))
38 #define GST_SPECTRUM_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST((klass), GST_TYPE_SPECTRUM,GstSpectrumClass))
39 #define GST_IS_SPECTRUM_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE((klass), GST_TYPE_SPECTRUM))
41 typedef struct _GstSpectrum GstSpectrum;
42 typedef struct _GstSpectrumClass GstSpectrumClass;
43 typedef void (*GstSpectrumProcessFunc) (GstSpectrum *, const guint8 *);
44 typedef void (*GstSpectrumFFTFreeFunc) (void *);
47 GstAudioFilter element;
49 GstPad *sinkpad,*srcpad;
53 gboolean message; /* whether or not to post messages */
54 gboolean message_magnitude;
55 gboolean message_phase;
56 guint64 interval; /* how many seconds between emits */
57 guint bands; /* number of spectrum bands */
58 gint threshold; /* energy level treshold */
60 gint num_frames; /* frame count (1 sample per channel)
62 gint num_fft; /* number of FFTs since last emit */
63 GstClockTime message_ts; /* starttime for next message */
66 gfloat *spect_magnitude;
68 GstSpectrumProcessFunc process;
70 GstSpectrumFFTFreeFunc fft_free_func;
75 struct _GstSpectrumClass {
76 GstAudioFilterClass parent_class;
79 GType gst_spectrum_get_type (void);
84 #endif /* __cplusplus */
87 #endif /* __GST_SPECTRUM_H__ */