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6f6fe37ed9
It is now possible to update the currently used ntp-offset with a custom serialized downstream event. The element will read the ntp-offset property when doing the state transition from READY to PAUSED and use that offset until it receives a "GstNtpOffset" event, which also has a "ntp-offset" attribute in that it's structure. In case the property is not set and no event has been received, the element will guess the npt-offset with help of the clock. If no clock can be retrieved, the element will error out and stop the data flow. The same event is also used for updating the D/E-bits in the RTP extension header. The discont flag in a buffer can be set whenver a live/network source looses a frame, but that is not the type of discontinuity that the onvif extension header should reflect. The header is mainly used for playback of a track concept, in which gaps can be present, and it's those kind of gaps that should be highlighted with the D- and E-bits. https://bugzilla.gnome.org/show_bug.cgi?id=757688
81 lines
2.4 KiB
C
81 lines
2.4 KiB
C
/*
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* gstrtponviftimestamp.h
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*
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* Copyright (C) 2014 Axis Communications AB
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* Author: Guillaume Desmottes <guillaume.desmottes@collabora.com>
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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, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef __GST_RTP_ONVIF_TIMESTAMP_H__
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#define __GST_RTP_ONVIF_TIMESTAMP_H__
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#include <gst/gst.h>
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#ifdef __cplusplus
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extern "C" {
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#endif /* __cplusplus */
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#define GST_TYPE_RTP_ONVIF_TIMESTAMP \
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(gst_rtp_onvif_timestamp_get_type())
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#define GST_RTP_ONVIF_TIMESTAMP(obj) \
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(G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_RTP_ONVIF_TIMESTAMP,GstRtpOnvifTimestamp))
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#define GST_RTP_ONVIF_TIMESTAMP_CLASS(klass) \
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(G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_RTP_ONVIF_TIMESTAMP,GstRtpOnvifTimestampClass))
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#define GST_IS_RTP_ONVIF_TIMESTAMP(obj) \
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(G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_RTP_ONVIF_TIMESTAMP))
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#define GST_IS_RTP_ONVIF_TIMESTAMP_CLASS(klass) \
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(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_RTP_ONVIF_TIMESTAMP))
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typedef struct _GstRtpOnvifTimestamp GstRtpOnvifTimestamp;
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typedef struct _GstRtpOnvifTimestampClass GstRtpOnvifTimestampClass;
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struct _GstRtpOnvifTimestamp {
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GstElement element;
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/* pads */
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GstPad *sinkpad,*srcpad;
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GstClockTime prop_ntp_offset;
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guint prop_cseq;
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gboolean prop_set_e_bit;
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/* currently used ntp-offset
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*(can be changed runtime with a GstNtpOffset event)
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*/
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GstClockTime ntp_offset;
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/* a GstNtpOffset event might mark the stream as discontinued */
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gboolean set_d_bit;
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gboolean set_e_bit;
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GstSegment segment;
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/* Buffer waiting to be handled, only used if prop_set_e_bit is TRUE */
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GQueue *event_queue;
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GstBuffer *buffer;
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GstBufferList *list;
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};
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struct _GstRtpOnvifTimestampClass {
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GstElementClass parent_class;
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};
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GType gst_rtp_onvif_timestamp_get_type(void);
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#ifdef __cplusplus
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}
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#endif /* __cplusplus */
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#endif /* __GST_RTP_ONVIF_TIMESTAMP_H__ */
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