gstreamer/subprojects/gst-plugins-bad/ext/closedcaption/ccutils.h

138 lines
6 KiB
C

/*
* GStreamer
* Copyright (C) 2022 Matthew Waters <matthew@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.
*/
#include <gst/gst.h>
#include <gst/video/video.h>
#ifndef __CCUTILS_H__
#define __CCUTILS_H__
G_BEGIN_DECLS
GST_DEBUG_CATEGORY_EXTERN(ccutils_debug_cat);
struct cdp_fps_entry
{
guint8 fps_idx; /* value stored in cdp */
guint fps_n, fps_d;
guint max_cc_count;
guint max_ccp_count;
guint max_cea608_count;
};
G_GNUC_INTERNAL
const struct cdp_fps_entry * cdp_fps_entry_from_fps (guint fps_n, guint fps_d);
G_GNUC_INTERNAL
const struct cdp_fps_entry * cdp_fps_entry_from_id (guint8 id);
extern const struct cdp_fps_entry null_fps_entry;
typedef enum {
GST_CC_CDP_MODE_TIME_CODE = (1<<0),
GST_CC_CDP_MODE_CC_DATA = (1<<1),
GST_CC_CDP_MODE_CC_SVC_INFO = (1<<2)
} GstCCCDPMode;
G_GNUC_INTERNAL
guint convert_cea708_cc_data_to_cdp (GstObject * dbg_obj,
GstCCCDPMode cdp_mode,
guint16 cdp_hdr_sequence_cntr,
const guint8 * cc_data,
guint cc_data_len,
guint8 * cdp,
guint cdp_len,
const GstVideoTimeCode * tc,
const struct cdp_fps_entry *fps_entry);
G_GNUC_INTERNAL
guint convert_cea708_cdp_to_cc_data (GstObject * dbg_obj,
const guint8 * cdp,
guint cdp_len,
guint8 *cc_data,
GstVideoTimeCode * tc,
const struct cdp_fps_entry **out_fps_entry);
G_GNUC_INTERNAL
gint drop_ccp_from_cc_data (guint8 * cc_data,
guint cc_data_len);
#define MAX_CDP_PACKET_LEN 256
#define MAX_CEA608_LEN 32
G_DECLARE_FINAL_TYPE (CCBuffer, cc_buffer, GST, CC_BUFFER, GObject);
G_GNUC_INTERNAL
CCBuffer * cc_buffer_new (void);
G_GNUC_INTERNAL
void cc_buffer_get_stored_size (CCBuffer * buf,
guint * cea608_1_len,
guint * cea608_2_len,
guint * cc_data_len);
G_GNUC_INTERNAL
gboolean cc_buffer_push_separated (CCBuffer * buf,
const guint8 * cea608_1,
guint cea608_1_len,
const guint8 * cea608_2,
guint cea608_2_len,
const guint8 * cc_data,
guint cc_data_len);
G_GNUC_INTERNAL
gboolean cc_buffer_push_cc_data (CCBuffer * buf,
const guint8 * cc_data,
guint cc_data_len);
G_GNUC_INTERNAL
void cc_buffer_take_cc_data (CCBuffer * buf,
const struct cdp_fps_entry * fps_entry,
gboolean nul_padding,
guint8 * cc_data,
guint * cc_data_len);
G_GNUC_INTERNAL
void cc_buffer_take_separated (CCBuffer * buf,
const struct cdp_fps_entry * fps_entry,
guint8 * cea608_1,
guint * cea608_1_len,
guint8 * cea608_2,
guint * cea608_2_len,
guint8 * cc_data,
guint * cc_data_len);
G_GNUC_INTERNAL
void cc_buffer_take_cea608_field1 (CCBuffer * buf,
const struct cdp_fps_entry * fps_entry,
guint8 * cea608_1,
guint * cea608_1_len);
G_GNUC_INTERNAL
void cc_buffer_take_cea608_field2 (CCBuffer * buf,
const struct cdp_fps_entry * fps_entry,
guint8 * cea608_2,
guint * cea608_2_len);
G_GNUC_INTERNAL
gboolean cc_buffer_is_empty (CCBuffer * buf);
G_GNUC_INTERNAL
void cc_buffer_discard (CCBuffer * buf);
G_GNUC_INTERNAL
void cc_buffer_set_max_buffer_time (CCBuffer * buf,
GstClockTime max_time);
G_GNUC_INTERNAL
void cc_buffer_set_output_padding (CCBuffer * buf,
gboolean output_padding,
gboolean output_ccp_padding);
G_END_DECLS
#endif