gstreamer/gst/rtp/rtpredcommon.c

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/* 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>
*/
#include "rtpredcommon.h"
gsize
rtp_red_block_header_get_length (gboolean is_redundant)
{
return is_redundant ? sizeof (RedBlockHeader) : 1;
}
gboolean
rtp_red_block_is_redundant (gpointer red_block)
{
return ((RedBlockHeader *) red_block)->F;
}
guint8
rtp_red_block_get_payload_type (gpointer red_block)
{
return ((RedBlockHeader *) red_block)->pt;
}
guint16
rtp_red_block_get_payload_length (gpointer red_block)
{
RedBlockHeader *hdr = (RedBlockHeader *) red_block;
return (hdr->length_hi << 8) | hdr->length_lo;
}
guint16
rtp_red_block_get_timestamp_offset (gpointer red_block)
{
RedBlockHeader *hdr = (RedBlockHeader *) red_block;
return (hdr->timestamp_offset_hi << 6) | hdr->timestamp_offset_lo;
}
void
rtp_red_block_set_payload_type (gpointer red_block, guint8 pt)
{
((RedBlockHeader *) red_block)->pt = pt;
}
void
rtp_red_block_set_is_redundant (gpointer red_block, gboolean is_redundant)
{
((RedBlockHeader *) red_block)->F = is_redundant;
}
void
rtp_red_block_set_timestamp_offset (gpointer red_block,
guint16 timestamp_offset)
{
RedBlockHeader *hdr = (RedBlockHeader *) red_block;
g_assert (rtp_red_block_is_redundant (red_block));
g_assert_cmpint (timestamp_offset, <=, RED_BLOCK_TIMESTAMP_OFFSET_MAX);
hdr->timestamp_offset_lo = timestamp_offset & 0x3f;
hdr->timestamp_offset_hi = timestamp_offset >> 6;
}
void
rtp_red_block_set_payload_length (gpointer red_block, guint16 length)
{
RedBlockHeader *hdr = (RedBlockHeader *) red_block;
g_assert (rtp_red_block_is_redundant (red_block));
g_assert_cmpint (length, <=, RED_BLOCK_LENGTH_MAX);
hdr->length_lo = length & 0xff;
hdr->length_hi = length >> 8;
}