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2a1553cb88
Allows detecting and extracting CEA608 closed caption present on the VBI of analog NTSC SD signals.
73 lines
2.2 KiB
C
73 lines
2.2 KiB
C
/*
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* GStreamer
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* Copyright (C) 2018 Edward Hervey <edward@centricular.com>
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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_LINE21DECODER_H__
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#define __GST_LINE21DECODER_H__
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#include <gst/gst.h>
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#include <gst/video/video.h>
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#include <gst/video/video-anc.h>
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#include "decoder.h"
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G_BEGIN_DECLS
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#define GST_TYPE_LINE21DECODER \
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(gst_line_21_decoder_get_type())
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#define GST_LINE21DECODER(obj) \
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(G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_LINE21DECODER,GstLine21Decoder))
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#define GST_LINE21DECODER_CLASS(klass) \
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(G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_LINE21DECODER,GstLine21DecoderClass))
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#define GST_IS_LINE21DECODER(obj) \
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(G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_LINE21DECODER))
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#define GST_IS_LINE21DECODER_CLASS(klass) \
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(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_LINE21DECODER))
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typedef struct _GstLine21Decoder GstLine21Decoder;
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typedef struct _GstLine21DecoderClass GstLine21DecoderClass;
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struct _GstLine21Decoder
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{
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GstVideoFilter parent;
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gboolean compatible_format;
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vbi_raw_decoder zvbi_decoder;
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/* Offset (in lines) to "line 21" in the incoming stream */
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gint line21_offset;
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/* Maximum number of lines to probe when looking for CC */
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gint max_line_probes;
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/* Whether input data is v210 and needs to be converted before
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* processing */
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gboolean convert_v210;
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guint8 *converted_lines;
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GstVideoInfo *info;
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};
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struct _GstLine21DecoderClass
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{
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GstVideoFilterClass parent_class;
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};
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GType gst_line_21_decoder_get_type (void);
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G_END_DECLS
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#endif /* __GST_LINE21DECODER_H__ */
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