gstreamer/subprojects/gst-plugins-good/gst/rtp/rtpredcommon.h

80 lines
2.6 KiB
C

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