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/*
* GStreamer
* Copyright (C) 2010 Robert Swain <robert.swain@collabora.co.uk>
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*
* Alternatively, the contents of this file may be used under the
* GNU Lesser General Public License Version 2.1 (the "LGPL"), in
* which case the following provisions apply instead of the ones
* mentioned above:
*
* 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_FIELDANALYSIS_H__
#define __GST_FIELDANALYSIS_H__
#include <gst/gst.h>
G_BEGIN_DECLS
#define GST_TYPE_FIELDANALYSIS \
(gst_field_analysis_get_type())
#define GST_FIELDANALYSIS(obj) \
(G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_FIELDANALYSIS,GstFieldAnalysis))
#define GST_FIELDANALYSIS_CLASS(klass) \
(G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_FIELDANALYSIS,GstFieldAnalysisClass))
#define GST_IS_FIELDANALYSIS(obj) \
(G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_FIELDANALYSIS))
#define GST_IS_FIELDANALYSIS_CLASS(klass) \
(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_FIELDANALYSIS))
typedef struct _GstFieldAnalysis GstFieldAnalysis;
typedef struct _GstFieldAnalysisClass GstFieldAnalysisClass;
typedef struct _FieldAnalysisFields FieldAnalysisFields;
typedef struct _FieldAnalysis FieldAnalysis;
typedef enum
{
FIELD_ANALYSIS_PROGRESSIVE,
FIELD_ANALYSIS_INTERLACED,
FIELD_ANALYSIS_TELECINE_PROGRESSIVE,
FIELD_ANALYSIS_TELECINE_MIXED
} FieldAnalysisConclusion;
enum FieldParity
{
TOP_FIELD,
BOTTOM_FIELD,
BOTH_FIELDS
};
struct _FieldAnalysisFields
{
GstBuffer *buf;
gboolean parity;
};
struct _FieldAnalysis
{
/* frame, top, bottom, top with prev bottom, bottom with prev top */
gfloat f, t, b, t_b, b_t;
FieldAnalysisConclusion conclusion;
/* -1 - unknown; 0 - holding none; 1 - top field; 2 - bottom field; 3 - both */
gint holding;
gboolean drop;
};
typedef enum
{
METHOD_32DETECT,
METHOD_IS_COMBED,
METHOD_5_TAP
} FieldAnalysisCombMethod;
struct _GstFieldAnalysis
{
GstElement element;
GstPad *sinkpad, *srcpad;
GQueue *frames;
gint width, height;
gint data_offset;
gint line_stride; /* step size in bytes from the 0th sample of one line to the next */
gint sample_incr; /* step size in bytes from one sample to the next */
FieldAnalysis results[2];
gfloat (*same_field) (GstFieldAnalysis *, FieldAnalysisFields *);
gfloat (*same_frame) (GstFieldAnalysis *, FieldAnalysisFields *);
guint64 (*block_score_for_row) (GstFieldAnalysis *, guint8 *, guint8 *);
gboolean is_telecine;
gboolean first_buffer; /* indicates the first buffer for which a buffer will be output
* after a discont or flushing seek */
guint8 *comb_mask;
guint *block_scores;
gboolean flushing; /* indicates whether we are flushing or not */
/* properties */
guint32 noise_floor; /* threshold for the result of a metric to be valid */
gfloat field_thresh; /* threshold used for the same parity field metric */
gfloat frame_thresh; /* threshold used for the opposite parity field metric */
gint64 spatial_thresh; /* threshold used spatial comb detection */
guint64 block_width, block_height; /* width/height of window used for comb clusted detection */
guint64 block_thresh;
guint64 ignored_lines;
};
struct _GstFieldAnalysisClass
{
GstElementClass parent_class;
};
GType gst_field_analysis_get_type (void);
G_END_DECLS
#endif /* __GST_FIELDANALYSIS_H__ */
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