gstreamer/gst/rtp/gstrtph261depay.h
Stian Selnes ef8d630a59 rtp: add H.261 RTP payloader and depayloader
Implementation according to RFC 4587.

Payloader create fragments on MB boundaries in order to match MTU size
the best it can. Some decoders/depayloaders in the wild are very strict
about receiving a continuous bit-stream (e.g. no no-op bits between
frames), so the payloader will shift the compressed bit-stream of a
frame to align with the last significant bit of the previous frame.

Depayloader does not try to be fancy in case of packet loss. It simply
drops all packets for a frame if there is a loss, keeping it simple.

https://bugzilla.gnome.org/show_bug.cgi?id=751886
2015-07-03 11:48:41 +01:00

60 lines
1.9 KiB
C

/* GStreamer
* Copyright (C) <2014> Stian Selnes <stian@pexip.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#ifndef __GST_RTP_H261_DEPAY_H__
#define __GST_RTP_H261_DEPAY_H__
#include <gst/gst.h>
#include <gst/base/gstadapter.h>
#include <gst/rtp/gstrtpbasedepayload.h>
G_BEGIN_DECLS
#define GST_TYPE_RTP_H261_DEPAY \
(gst_rtp_h261_depay_get_type())
#define GST_RTP_H261_DEPAY(obj) \
(G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_RTP_H261_DEPAY,GstRtpH261Depay))
#define GST_RTP_H261_DEPAY_CLASS(klass) \
(G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_RTP_H261_DEPAY,GstRtpH261DepayClass))
#define GST_IS_RTP_H261_DEPAY(obj) \
(G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_RTP_H261_DEPAY))
#define GST_IS_RTP_H261_DEPAY_CLASS(klass) \
(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_RTP_H261_DEPAY))
typedef struct _GstRtpH261Depay GstRtpH261Depay;
typedef struct _GstRtpH261DepayClass GstRtpH261DepayClass;
struct _GstRtpH261Depay
{
GstRTPBaseDepayload depayload;
GstAdapter *adapter;
gboolean start;
guint8 leftover;
};
struct _GstRtpH261DepayClass
{
GstRTPBaseDepayloadClass parent_class;
};
GType gst_rtp_h261_depay_get_type (void);
gboolean gst_rtp_h261_depay_plugin_init (GstPlugin * plugin);
G_END_DECLS
#endif /* __GST_RTP_H261_DEPAY_H__ */