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/*
* GStreamer
* Copyright (C) 2018 Sebastian Dröge <sebastian@centricular.com>
*
* 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., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#ifndef __GST_CCCONVERTER_H__
#define __GST_CCCONVERTER_H__
#include <gst/gst.h>
#include <gst/base/base.h>
#include <gst/video/video.h>
G_BEGIN_DECLS
#define GST_TYPE_CCCONVERTER \
(gst_cc_converter_get_type())
#define GST_CCCONVERTER(obj) \
(G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_CCCONVERTER,GstCCConverter))
#define GST_CCCONVERTER_CLASS(klass) \
(G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_CCCONVERTER,GstCCConverterClass))
#define GST_IS_CCCONVERTER(obj) \
(G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_CCCONVERTER))
#define GST_IS_CCCONVERTER_CLASS(klass) \
(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_CCCONVERTER))
typedef struct _GstCCConverter GstCCConverter;
typedef struct _GstCCConverterClass GstCCConverterClass;
#define MAX_CDP_PACKET_LEN 256
#define MAX_CEA608_LEN 32
typedef enum {
GST_CC_CONVERTER_CDP_MODE_TIME_CODE = (1<<0),
GST_CC_CONVERTER_CDP_MODE_CC_DATA = (1<<1),
GST_CC_CONVERTER_CDP_MODE_CC_SVC_INFO = (1<<2)
} GstCCConverterCDPMode;
struct _GstCCConverter
{
GstBaseTransform parent;
GstCCConverterCDPMode cdp_mode;
GstVideoCaptionType input_caption_type;
GstVideoCaptionType output_caption_type;
/* CDP sequence numbers when outputting CDP */
guint16 cdp_hdr_sequence_cntr;
gint in_fps_n, in_fps_d;
gint out_fps_n, out_fps_d;
/* for framerate differences, we need to keep previous/next frames in order
* to split/merge data across multiple input or output buffers. The data is
* stored as cc_data */
guint8 scratch_cea608_1[MAX_CEA608_LEN];
guint scratch_cea608_1_len;
guint8 scratch_cea608_2[MAX_CEA608_LEN];
guint scratch_cea608_2_len;
guint8 scratch_ccp[MAX_CDP_PACKET_LEN];
guint scratch_ccp_len;
guint input_frames;
guint output_frames;
GstVideoTimeCode current_output_timecode;
/* previous buffer for copying metas onto */
GstBuffer *previous_buffer;
};
struct _GstCCConverterClass
{
GstBaseTransformClass parent_class;
};
GType gst_cc_converter_get_type (void);
GST_ELEMENT_REGISTER_DECLARE (ccconverter);
G_END_DECLS
#endif /* __GST_CCCONVERTER_H__ */
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