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80 lines
2.6 KiB
C
80 lines
2.6 KiB
C
/* GStreamer plugin for forward error correction
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* Copyright (C) 2017 Pexip
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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 Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 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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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*
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* Author: Mikhail Fludkov <misha@pexip.com>
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*/
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#ifndef __RTP_RED_COMMON_H__
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#define __RTP_RED_COMMON_H__
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#include <glib.h>
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G_BEGIN_DECLS
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typedef struct _RedBlockHeader RedBlockHeader;
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/* RFC 2198 */
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/*
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0 1 2 3
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0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
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+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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|F| block PT | timestamp offset | block length |
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+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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*/
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struct _RedBlockHeader {
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#if G_BYTE_ORDER == G_LITTLE_ENDIAN
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guint pt:7;
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guint F:1;
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guint timestamp_offset_hi: 8;
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guint length_hi: 2;
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guint timestamp_offset_lo: 6;
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guint length_lo: 8;
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#elif G_BYTE_ORDER == G_BIG_ENDIAN
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guint F:1;
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guint pt:7;
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guint timestamp_offset_hi: 8;
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guint timestamp_offset_lo: 6;
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guint length_hi: 2;
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guint length_lo: 8;
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#else
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#error "G_BYTE_ORDER should be big or little endian."
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#endif
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};
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#define RED_BLOCK_TIMESTAMP_OFFSET_MAX ((1<<14) - 1)
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#define RED_BLOCK_LENGTH_MAX ((1<<10) - 1)
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gsize rtp_red_block_header_get_length (gboolean is_redundant);
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gboolean rtp_red_block_is_redundant (gpointer red_block);
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void rtp_red_block_set_payload_type (gpointer red_block, guint8 pt);
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void rtp_red_block_set_timestamp_offset (gpointer red_block, guint16 timestamp_offset);
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void rtp_red_block_set_payload_length (gpointer red_block, guint16 length);
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guint16 rtp_red_block_get_timestamp_offset (gpointer red_block);
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guint8 rtp_red_block_get_payload_type (gpointer red_block);
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void rtp_red_block_set_is_redundant (gpointer red_block, gboolean is_redundant);
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guint16 rtp_red_block_get_payload_length (gpointer red_block);
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G_END_DECLS
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#endif
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