mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-11-27 20:21:24 +00:00
5d592f709f
Original commit message from CVS: Fix segfault in #125471 by denying a state change to PLAYING when not inited. This is arguably not the right fix.
91 lines
2.8 KiB
C
91 lines
2.8 KiB
C
/* GStreamer
|
|
* Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
|
|
*
|
|
* gstlevel.c: signals RMS, peak and decaying peak levels
|
|
* Copyright (C) 2000,2001,2002,2003
|
|
* Thomas Vander Stichele <thomas at apestaart dot org>
|
|
*
|
|
* 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_LEVEL_H__
|
|
#define __GST_LEVEL_H__
|
|
|
|
|
|
#include <gst/gst.h>
|
|
|
|
#include "gstlevel-marshal.h"
|
|
|
|
#ifdef __cplusplus
|
|
extern "C" {
|
|
#endif /* __cplusplus */
|
|
|
|
|
|
#define GST_TYPE_LEVEL \
|
|
(gst_level_get_type())
|
|
#define GST_LEVEL(obj) \
|
|
(G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_LEVEL,GstLevel))
|
|
#define GST_LEVEL_CLASS(klass) \
|
|
(G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_ULAW,GstLevel))
|
|
#define GST_IS_LEVEL(obj) \
|
|
(G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_LEVEL))
|
|
#define GST_IS_LEVEL_CLASS(obj) \
|
|
(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_LEVEL))
|
|
|
|
typedef struct _GstLevel GstLevel;
|
|
typedef struct _GstLevelClass GstLevelClass;
|
|
|
|
struct _GstLevel {
|
|
GstElement element;
|
|
|
|
GstPad *sinkpad, *srcpad;
|
|
gboolean signal; /* whether or not to emit signals */
|
|
gboolean inited; /* whether or not the element is initialized */
|
|
gdouble interval; /* how many seconds between emits */
|
|
|
|
gint rate; /* caps variables */
|
|
gint width;
|
|
gint channels;
|
|
|
|
gdouble decay_peak_ttl; /* time to live for peak in seconds */
|
|
gdouble decay_peak_falloff; /* falloff in dB/sec */
|
|
gdouble num_samples; /* cumulative sample count */
|
|
|
|
/* per-channel arrays for intermediate values */
|
|
gdouble *CS; /* normalized Cumulative Square */
|
|
gdouble *peak; /* normalized Peak value over buffer */
|
|
gdouble *last_peak; /* last normalized Peak value over interval */
|
|
gdouble *decay_peak; /* running decaying normalized Peak */
|
|
gdouble *MS; /* normalized Mean Square of buffer */
|
|
gdouble *RMS_dB; /* RMS in dB to emit */
|
|
gdouble *decay_peak_age; /* age of last peak */
|
|
};
|
|
|
|
struct _GstLevelClass {
|
|
GstElementClass parent_class;
|
|
void (*level) (GstElement *element, gdouble time, gint channel,
|
|
gdouble RMS_dB, gdouble peak_dB, gdouble decay_peak_dB);
|
|
};
|
|
|
|
GType gst_level_get_type(void);
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif /* __cplusplus */
|
|
|
|
|
|
#endif /* __GST_STEREO_H__ */
|