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d5ad50bd61
We expose a set of new elements: * ULPFEC encoder / decoder * A storage element, which should be placed before jitterbuffers, and is used to store packets in order to attempt reconstruction after the jitterbuffer has sent PacketLost events * RED encoder / decoder (RFC 2198), these are necessary to use FEC in webrtc, as browsers will propose and expect ulpfec packets to be wrapped in red packets With contributions from: Mathieu Duponchelle <mathieu@centricular.com> Sebastian Dröge <sebastian@centricular.com> https://bugzilla.gnome.org/show_bug.cgi?id=792696
60 lines
2.6 KiB
C
60 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 __GST_RTP_STORAGE_ITEM_H__
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#define __GST_RTP_STORAGE_ITEM_H__
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#include <gst/rtp/gstrtpbuffer.h>
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typedef struct {
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GstBuffer *buffer;
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guint16 seq;
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guint8 pt;
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} RtpStorageItem;
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typedef struct {
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GQueue queue;
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GMutex stream_lock;
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guint32 ssrc;
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GstClockTime max_arrival_time;
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} RtpStorageStream;
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#define STREAM_LOCK(s) g_mutex_lock (&(s)->stream_lock)
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#define STREAM_UNLOCK(s) g_mutex_unlock (&(s)->stream_lock)
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RtpStorageStream * rtp_storage_stream_new (guint32 ssrc);
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void rtp_storage_stream_free (RtpStorageStream * stream);
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void rtp_storage_stream_resize_and_add_item (RtpStorageStream * stream,
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GstClockTime size_time,
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GstBuffer *buffer,
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guint8 pt,
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guint16 seq);
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void rtp_storage_stream_add_item (RtpStorageStream * stream,
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GstBuffer *buffer,
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guint8 pt,
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guint16 seq);
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GstBufferList * rtp_storage_stream_get_packets_for_recovery (RtpStorageStream *stream,
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guint8 pt_fec,
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guint16 lost_seq);
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GstBuffer * rtp_storage_stream_get_redundant_packet (RtpStorageStream *stream,
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guint16 lost_seq);
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#endif /* __GST_RTP_STORAGE_ITEM_H__ */
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