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https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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a26b363d3e
Cea608 (valid) padding removal is available on the input side of ccconverter or configurable on cccombiner. cccombiner can now configure whether valid or invalid cea608 padding is used and for valid padding, how long after valid non-padding to keep sending valid padding. Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/6300>
168 lines
7.1 KiB
C
168 lines
7.1 KiB
C
/*
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* GStreamer
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* Copyright (C) 2022 Matthew Waters <matthew@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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#include <gst/gst.h>
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#include <gst/video/video.h>
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#ifndef __CCUTILS_H__
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#define __CCUTILS_H__
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G_BEGIN_DECLS
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GST_DEBUG_CATEGORY_EXTERN(ccutils_debug_cat);
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struct cdp_fps_entry
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{
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guint8 fps_idx; /* value stored in cdp */
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guint fps_n, fps_d;
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guint max_cc_count;
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guint max_ccp_count;
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guint max_cea608_count;
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};
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G_GNUC_INTERNAL
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const struct cdp_fps_entry * cdp_fps_entry_from_fps (guint fps_n, guint fps_d);
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G_GNUC_INTERNAL
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const struct cdp_fps_entry * cdp_fps_entry_from_id (guint8 id);
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extern const struct cdp_fps_entry null_fps_entry;
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typedef enum {
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GST_CC_CDP_MODE_TIME_CODE = (1<<0),
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GST_CC_CDP_MODE_CC_DATA = (1<<1),
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GST_CC_CDP_MODE_CC_SVC_INFO = (1<<2)
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} GstCCCDPMode;
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G_GNUC_INTERNAL
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guint convert_cea708_cc_data_to_cdp (GstObject * dbg_obj,
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GstCCCDPMode cdp_mode,
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guint16 cdp_hdr_sequence_cntr,
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const guint8 * cc_data,
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guint cc_data_len,
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guint8 * cdp,
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guint cdp_len,
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const GstVideoTimeCode * tc,
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const struct cdp_fps_entry *fps_entry);
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G_GNUC_INTERNAL
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guint convert_cea708_cdp_to_cc_data (GstObject * dbg_obj,
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const guint8 * cdp,
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guint cdp_len,
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guint8 *cc_data,
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GstVideoTimeCode * tc,
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const struct cdp_fps_entry **out_fps_entry);
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G_GNUC_INTERNAL
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gint drop_ccp_from_cc_data (guint8 * cc_data,
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guint cc_data_len);
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#define MAX_CDP_PACKET_LEN 256
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#define MAX_CEA608_LEN 32
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/**
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* GstCCBufferCea608PaddingStrategy:
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* @CC_BUFFER_CEA608_PADDING_STRATEGY_INPUT_REMOVE: Keep whatever padding was provided on the input.
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* Do not add, remove, or modify, any padding bytes.
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* @CC_BUFFER_CEA608_PADDING_STRATEGY_VALID: Always modify any padding data to become valid.
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* This may cause a stream to show as a CEA-608 caption stream with no contents.
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*
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* Since: 1.26
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*/
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/**
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* @CC_BUFFER_CEA608_PADDING_STRATEGY_INPUT_REMOVE:
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* Since: 1.26
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*/
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/**
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* @CC_BUFFER_CEA608_PADDING_STRATEGY_VALID:
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* Since: 1.26
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*/
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typedef enum {
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CC_BUFFER_CEA608_PADDING_STRATEGY_INPUT_REMOVE = (1 << 0),
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CC_BUFFER_CEA608_PADDING_STRATEGY_VALID = (1 << 1),
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} CCBufferCea608PaddingStrategy;
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#define GST_TYPE_CC_BUFFER_CEA608_PADDING_STRATEGY (gst_cc_buffer_cea608_padding_strategy_get_type())
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GType gst_cc_buffer_cea608_padding_strategy_get_type (void);
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G_DECLARE_FINAL_TYPE (CCBuffer, cc_buffer, GST, CC_BUFFER, GObject);
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G_GNUC_INTERNAL
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CCBuffer * cc_buffer_new (void);
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G_GNUC_INTERNAL
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void cc_buffer_get_stored_size (CCBuffer * buf,
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guint * cea608_1_len,
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guint * cea608_2_len,
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guint * cc_data_len);
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G_GNUC_INTERNAL
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gboolean cc_buffer_push_separated (CCBuffer * buf,
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const guint8 * cea608_1,
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guint cea608_1_len,
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const guint8 * cea608_2,
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guint cea608_2_len,
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const guint8 * cc_data,
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guint cc_data_len);
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G_GNUC_INTERNAL
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gboolean cc_buffer_push_cc_data (CCBuffer * buf,
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const guint8 * cc_data,
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guint cc_data_len);
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G_GNUC_INTERNAL
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void cc_buffer_take_cc_data (CCBuffer * buf,
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const struct cdp_fps_entry * fps_entry,
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guint8 * cc_data,
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guint * cc_data_len);
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G_GNUC_INTERNAL
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void cc_buffer_take_separated (CCBuffer * buf,
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const struct cdp_fps_entry * fps_entry,
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guint8 * cea608_1,
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guint * cea608_1_len,
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guint8 * cea608_2,
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guint * cea608_2_len,
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guint8 * cc_data,
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guint * cc_data_len);
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G_GNUC_INTERNAL
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void cc_buffer_take_cea608_field1 (CCBuffer * buf,
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const struct cdp_fps_entry * fps_entry,
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guint8 * cea608_1,
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guint * cea608_1_len);
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G_GNUC_INTERNAL
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void cc_buffer_take_cea608_field2 (CCBuffer * buf,
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const struct cdp_fps_entry * fps_entry,
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guint8 * cea608_2,
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guint * cea608_2_len);
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G_GNUC_INTERNAL
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gboolean cc_buffer_is_empty (CCBuffer * buf);
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G_GNUC_INTERNAL
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void cc_buffer_discard (CCBuffer * buf);
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G_GNUC_INTERNAL
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void cc_buffer_set_max_buffer_time (CCBuffer * buf,
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GstClockTime max_time);
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G_GNUC_INTERNAL
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void cc_buffer_set_output_padding (CCBuffer * buf,
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gboolean output_padding,
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gboolean output_ccp_padding);
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G_GNUC_INTERNAL
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void cc_buffer_set_cea608_padding_strategy(CCBuffer * buf,
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CCBufferCea608PaddingStrategy padding_strategy);
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G_GNUC_INTERNAL
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void cc_buffer_set_cea608_valid_timeout (CCBuffer * buf, GstClockTime valid_timeout);
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G_END_DECLS
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#endif
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