69dcea025e
- Implements GStreamer element that analyzes pixel columns - Drops frames when column mean deviates from rolling baseline - Configurable window size, column index, stride, and threshold - Includes design documentation and build script - Tested successfully with IDS uEye camera source
79 lines
2.5 KiB
C
79 lines
2.5 KiB
C
/* GStreamer
|
|
* Copyright (C) 2024 <your-name@your-email.com>
|
|
*
|
|
* 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_ROLLING_SUM_H__
|
|
#define __GST_ROLLING_SUM_H__
|
|
|
|
#include <gst/base/gstbasetransform.h>
|
|
#include <gst/video/video.h>
|
|
|
|
G_BEGIN_DECLS
|
|
|
|
#define GST_TYPE_ROLLING_SUM \
|
|
(gst_rolling_sum_get_type())
|
|
#define GST_ROLLING_SUM(obj) \
|
|
(G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_ROLLING_SUM,GstRollingSum))
|
|
#define GST_ROLLING_SUM_CLASS(klass) \
|
|
(G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_ROLLING_SUM,GstRollingSumClass))
|
|
#define GST_IS_ROLLING_SUM(obj) \
|
|
(G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_ROLLING_SUM))
|
|
#define GST_IS_ROLLING_SUM_CLASS(klass) \
|
|
(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_ROLLING_SUM))
|
|
|
|
typedef struct _GstRollingSum GstRollingSum;
|
|
typedef struct _GstRollingSumClass GstRollingSumClass;
|
|
|
|
/**
|
|
* GstRollingSum:
|
|
* @element: the parent element.
|
|
*
|
|
* The opaque GstRollingSum data structure.
|
|
*/
|
|
struct _GstRollingSum
|
|
{
|
|
GstBaseTransform element;
|
|
|
|
/* Properties */
|
|
gint window_size; /* Number of frames in rolling window */
|
|
gint column_index; /* Which column to analyze (0-based) */
|
|
gint stride; /* Row sampling stride */
|
|
gdouble threshold; /* Deviation threshold for dropping frames */
|
|
|
|
/* State */
|
|
gdouble *ring_buffer; /* Circular buffer of column means */
|
|
gint ring_index; /* Current position in ring buffer */
|
|
gint frame_count; /* Total frames processed */
|
|
gdouble rolling_mean; /* Current rolling mean */
|
|
gdouble rolling_sum; /* Current rolling sum for efficient mean update */
|
|
|
|
/* Video format info */
|
|
GstVideoInfo video_info;
|
|
gboolean info_set;
|
|
};
|
|
|
|
struct _GstRollingSumClass
|
|
{
|
|
GstBaseTransformClass parent_class;
|
|
};
|
|
|
|
GType gst_rolling_sum_get_type(void);
|
|
|
|
G_END_DECLS
|
|
|
|
#endif /* __GST_ROLLING_SUM_H__ */ |