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149 lines
5 KiB
C
149 lines
5 KiB
C
/*
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* GStreamer
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* Copyright (C) 2010 Robert Swain <robert.swain@collabora.co.uk>
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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* DEALINGS IN THE SOFTWARE.
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*
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* Alternatively, the contents of this file may be used under the
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* GNU Lesser General Public License Version 2.1 (the "LGPL"), in
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* which case the following provisions apply instead of the ones
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* mentioned above:
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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#ifndef __GST_FIELDANALYSIS_H__
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#define __GST_FIELDANALYSIS_H__
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#include <gst/gst.h>
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G_BEGIN_DECLS
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#define GST_TYPE_FIELDANALYSIS \
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(gst_field_analysis_get_type())
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#define GST_FIELDANALYSIS(obj) \
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(G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_FIELDANALYSIS,GstFieldAnalysis))
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#define GST_FIELDANALYSIS_CLASS(klass) \
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(G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_FIELDANALYSIS,GstFieldAnalysisClass))
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#define GST_IS_FIELDANALYSIS(obj) \
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(G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_FIELDANALYSIS))
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#define GST_IS_FIELDANALYSIS_CLASS(klass) \
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(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_FIELDANALYSIS))
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typedef struct _GstFieldAnalysis GstFieldAnalysis;
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typedef struct _GstFieldAnalysisClass GstFieldAnalysisClass;
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typedef struct _FieldAnalysisFields FieldAnalysisFields;
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typedef struct _FieldAnalysisHistory FieldAnalysisHistory;
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typedef struct _FieldAnalysis FieldAnalysis;
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typedef enum
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{
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FIELD_ANALYSIS_PROGRESSIVE,
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FIELD_ANALYSIS_INTERLACED,
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FIELD_ANALYSIS_TELECINE_PROGRESSIVE,
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FIELD_ANALYSIS_TELECINE_MIXED
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} FieldAnalysisConclusion;
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enum FieldParity
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{
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TOP_FIELD,
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BOTTOM_FIELD,
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BOTH_FIELDS
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};
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struct _FieldAnalysis
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{
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/* frame, top, bottom, top with prev bottom, bottom with prev top */
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gfloat f, t, b, t_b, b_t;
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FieldAnalysisConclusion conclusion;
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/* -1 - unknown; 0 - holding none; 1 - top field; 2 - bottom field; 3 - both */
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gint holding;
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gboolean drop;
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};
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struct _FieldAnalysisFields
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{
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GstVideoFrame frame;
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gboolean parity;
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};
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struct _FieldAnalysisHistory
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{
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GstVideoFrame frame;
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FieldAnalysis results;
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};
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typedef enum
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{
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METHOD_32DETECT,
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METHOD_IS_COMBED,
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METHOD_5_TAP
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} FieldAnalysisCombMethod;
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struct _GstFieldAnalysis
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{
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GstElement element;
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GstPad *sinkpad, *srcpad;
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guint nframes;
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FieldAnalysisHistory frames[2];
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GstVideoInfo vinfo;
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gfloat (*same_field) (GstFieldAnalysis *, FieldAnalysisFields (*)[2]);
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gfloat (*same_frame) (GstFieldAnalysis *, FieldAnalysisFields (*)[2]);
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guint64 (*block_score_for_row) (GstFieldAnalysis *, FieldAnalysisFields (*)[2], guint8 *, guint8 *);
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gboolean is_telecine;
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gboolean first_buffer; /* indicates the first buffer for which a buffer will be output
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* after a discont or flushing seek */
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guint8 *comb_mask;
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guint *block_scores;
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gboolean flushing; /* indicates whether we are flushing or not */
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/* properties */
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guint32 noise_floor; /* threshold for the result of a metric to be valid */
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gfloat field_thresh; /* threshold used for the same parity field metric */
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gfloat frame_thresh; /* threshold used for the opposite parity field metric */
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gint64 spatial_thresh; /* threshold used spatial comb detection */
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guint64 block_width, block_height; /* width/height of window used for comb clusted detection */
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guint64 block_thresh;
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guint64 ignored_lines;
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};
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struct _GstFieldAnalysisClass
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{
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GstElementClass parent_class;
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};
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GType gst_field_analysis_get_type (void);
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GST_ELEMENT_REGISTER_DECLARE (fieldanalysis);
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G_END_DECLS
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#endif /* __GST_FIELDANALYSIS_H__ */
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