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/* GStreamer
* Copyright (C) <2009> Руслан Ижбулатов <lrn1986 _at_ gmail _dot_ com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 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
* Lesser General Public License for more details.
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301 USA
*/
#ifndef __GST_SSIM_H__
#define __GST_SSIM_H__
#include <gst/gst.h>
#include <gst/base/gstcollectpads.h>
#include <gst/video/video.h>
G_BEGIN_DECLS
enum
{
PROP_0,
PROP_SSIM_TYPE,
PROP_WINDOW_TYPE,
PROP_WINDOW_SIZE,
PROP_GAUSS_SIGMA,
};
#define GST_TYPE_SSIM (gst_ssim_get_type())
#define GST_SSIM(obj) (G_TYPE_CHECK_INSTANCE_CAST((obj), \
GST_TYPE_SSIM,GstSSim))
#define GST_IS_SSIM(obj) (G_TYPE_CHECK_INSTANCE_TYPE((obj), \
GST_TYPE_SSIM))
#define GST_SSIM_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST((klass) , \
GST_TYPE_SSIM,GstSSimClass))
#define GST_IS_SSIM_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE((klass) , \
GST_TYPE_SSIM))
#define GST_SSIM_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS((obj) , \
GST_TYPE_SSIM,GstSSimClass))
typedef struct _GstSSim GstSSim;
typedef struct _GstSSimClass GstSSimClass;
typedef struct _GstSSimWindowCache {
gint x_window_start;
gint x_weight_start;
gint x_window_end;
gint y_window_start;
gint y_weight_start;
gint y_window_end;
gfloat element_summ;
} GstSSimWindowCache;
typedef void (*GstSSimFunction) (GstSSim *ssim, guint8 *org, gfloat *orgmu,
guint8 *mod, guint8 *out, gfloat *mean, gfloat *lowest, gfloat *highest);
typedef struct _GstSSimOutputContext GstSSimOutputContext;
/* TODO: check if all fields are used */
struct _GstSSimOutputContext {
GstPad *pad;
gboolean segment_pending;
};
/**
* GstSSim:
*
* The ssim object structure.
*/
struct _GstSSim {
GstElement element;
/* Array of GstSSimOutputContext */
GPtrArray *src;
gint padcount;
GstCollectPads *collect;
GstPad *orig;
gint frame_rate;
gint frame_rate_base;
gint width;
gint height;
GstCaps *sinkcaps;
GstCaps *srccaps;
/* SSIM type (0 - canonical; 1 - without mu) */
gint ssimtype;
/* Size of a window, windows are square */
gint windowsize;
/* Type of a weight-generator. 0 - no weighting. 1 - Gaussian weighting */
gint windowtype;
/* Array of width*height GstSSimWindowCaches */
GstSSimWindowCache *windows;
/* Array of windowsize*windowsize gfloats */
gfloat *weights;
/* For Gaussian function */
gfloat sigma;
GstSSimFunction func;
gfloat const1;
gfloat const2;
/* counters to keep track of timestamps */
gint64 timestamp;
gint64 offset;
/* sink event handling */
GstPadEventFunction collect_event;
GstSegment segment;
guint64 segment_position;
gdouble segment_rate;
};
struct _GstSSimClass {
GstElementClass parent_class;
};
GType gst_ssim_get_type (void);
G_END_DECLS
#endif /* __GST_SSIM_H__ */
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