mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-12-21 07:46:38 +00:00
d912a42065
Original commit message from CVS: * gst/spectrum/gstspectrum.c: (gst_spectrum_reset_state), (gst_spectrum_transform_ip): * gst/spectrum/gstspectrum.h: Implement a simple compensation algorithm for rounding errors. This makes sure that a spectrum message is posted on the bus every interval nanoseconds. Fixes bug #567955.
79 lines
2.7 KiB
C
79 lines
2.7 KiB
C
/* GStreamer
|
|
* Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
|
|
* Copyright (C) <2009> Sebastian Dröge <sebastian.droege@collabora.co.uk>
|
|
*
|
|
* 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/audio/gstaudiofilter.h>
|
|
#include <gst/fft/gstfftf32.h>
|
|
|
|
G_BEGIN_DECLS
|
|
|
|
#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;
|
|
|
|
struct _GstSpectrum
|
|
{
|
|
GstAudioFilter parent;
|
|
|
|
/* properties */
|
|
gboolean message; /* whether or not to post messages */
|
|
gboolean message_magnitude;
|
|
gboolean message_phase;
|
|
guint64 interval; /* how many nanoseconds between emits */
|
|
guint64 frames_per_interval; /* how many frames per interval */
|
|
guint bands; /* number of spectrum bands */
|
|
gint threshold; /* energy level treshold */
|
|
|
|
guint64 num_frames; /* frame count (1 sample per channel)
|
|
* since last emit */
|
|
guint64 num_fft; /* number of FFTs since last emit */
|
|
GstClockTime message_ts; /* starttime for next message */
|
|
|
|
/* <private> */
|
|
gfloat *input;
|
|
guint input_pos;
|
|
gfloat *input_tmp;
|
|
GstFFTF32Complex *freqdata;
|
|
gfloat *spect_magnitude;
|
|
gfloat *spect_phase;
|
|
GstFFTF32 *fft_ctx;
|
|
|
|
guint64 error_per_interval;
|
|
guint64 accumulated_error;
|
|
};
|
|
|
|
struct _GstSpectrumClass
|
|
{
|
|
GstAudioFilterClass parent_class;
|
|
};
|
|
|
|
GType gst_spectrum_get_type (void);
|
|
|
|
G_END_DECLS
|
|
|
|
#endif /* __GST_SPECTRUM_H__ */
|