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76a3fd7100
Original commit message from CVS: * configure.ac: * gst/spectrum/Makefile.am: * gst/spectrum/demo-audiotest.c: (draw_spectrum), (message_handler), (main): * gst/spectrum/demo-osssrc.c: (draw_spectrum), (message_handler): * gst/spectrum/gstspectrum.c: (gst_spectrum_base_init), (gst_spectrum_class_init), (gst_spectrum_init), (gst_spectrum_dispose), (gst_spectrum_set_property), (gst_spectrum_get_property), (gst_spectrum_start), (gst_spectrum_setup), (gst_spectrum_message_new), (gst_spectrum_transform_ip): * gst/spectrum/gstspectrum.h: Port GstSpectrum to GstAudioFilter and libgstfft, add support for int32, float and double, use floats for the message contents, average all FFTs done in one interval for better results, use a better windowing function, allow posting the phase in the message and actually do an FFT with the requested number of bands instead of interpolating. * tests/check/elements/spectrum.c: (GST_START_TEST), (spectrum_suite): Improve the units tests by checking for a 11025Hz sine wave and add unit tests for all 4 supported sample types.
87 lines
2.7 KiB
C
87 lines
2.7 KiB
C
/* GStreamer
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* Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
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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_SPECTRUM_H__
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#define __GST_SPECTRUM_H__
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#include <gst/gst.h>
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#include <gst/base/gstadapter.h>
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#include <gst/base/gstbasetransform.h>
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#include <gst/audio/gstaudiofilter.h>
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#ifdef __cplusplus
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extern "C" {
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#endif /* __cplusplus */
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#define GST_TYPE_SPECTRUM (gst_spectrum_get_type())
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#define GST_SPECTRUM(obj) (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_SPECTRUM,GstSpectrum))
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#define GST_IS_SPECTRUM(obj) (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_SPECTRUM))
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#define GST_SPECTRUM_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST((klass), GST_TYPE_SPECTRUM,GstSpectrumClass))
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#define GST_IS_SPECTRUM_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE((klass), GST_TYPE_SPECTRUM))
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typedef struct _GstSpectrum GstSpectrum;
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typedef struct _GstSpectrumClass GstSpectrumClass;
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typedef void (*GstSpectrumProcessFunc) (GstSpectrum *, const guint8 *);
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typedef void (*GstSpectrumFFTFreeFunc) (void *);
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struct _GstSpectrum {
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GstAudioFilter element;
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GstPad *sinkpad,*srcpad;
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GstAdapter *adapter;
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GstSegment segment;
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/* properties */
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gboolean message; /* whether or not to post messages */
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gboolean message_magnitude;
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gboolean message_phase;
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guint64 interval; /* how many seconds between emits */
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guint bands; /* number of spectrum bands */
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gint threshold; /* energy level treshold */
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gint num_frames; /* frame count (1 sample per channel)
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* since last emit */
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gint num_fft; /* number of FFTs since last emit */
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/* <private> */
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gfloat *spect_magnitude;
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gfloat *spect_phase;
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GstSpectrumProcessFunc process;
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void *fft_ctx;
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GstSpectrumFFTFreeFunc fft_free_func;
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void *in;
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void *freqdata;
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};
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struct _GstSpectrumClass {
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GstAudioFilterClass parent_class;
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};
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GType gst_spectrum_get_type (void);
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#ifdef __cplusplus
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}
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#endif /* __cplusplus */
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#endif /* __GST_SPECTRUM_H__ */
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