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4cd15193bb
Use of the GAP flag is not really correct here and makes it difficult to handle real GAP buffers in deinterlace. The RFF flag is unused and can be reused with similar semantics - the buffers marked with RFF that are in a telecine state contain only unneeded repeated fields and so can be dropped.
145 lines
5 KiB
C
145 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., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, 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 _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 _FieldAnalysisFields
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{
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GstBuffer *buf;
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gboolean parity;
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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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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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GQueue *frames;
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gint width, height;
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gint data_offset;
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gint line_stride; /* step size in bytes from the 0th sample of one line to the next */
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gint sample_incr; /* step size in bytes from one sample to the next */
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FieldAnalysis results[2];
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gfloat (*same_field) (GstFieldAnalysis *, FieldAnalysisFields *);
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gfloat (*same_frame) (GstFieldAnalysis *, FieldAnalysisFields *);
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guint64 (*block_score_for_row) (GstFieldAnalysis *, 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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G_END_DECLS
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#endif /* __GST_FIELDANALYSIS_H__ */
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