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6477884a56
This patch introduces the AAF depayloader element, the counterpart from the AAF payloader. As expected, this element inputs AVTPDUs and outputs audio raw data and supports AAF PCM encapsulation only. The AAF depayloader srcpad produces a fixed format that is encoded within the AVTPDU. Once the first AVTPDU is received by the element, the audio features e.g. sample format, rate, number of channels, are decoded and the srcpad caps are set accordingly. Also, at this point, the element pushes a SEGMENT event downstream defining the segment according to the AVTP presentation time. All AVTP depayloaders will share some common code. For that reason, this patch introduces the GstAvtpBaseDepayload abstract class that implements common depayloader functionalities. AAF-specific functionalities are implemented in the derived class GstAvtpAafDepay.
80 lines
2.3 KiB
C
80 lines
2.3 KiB
C
/*
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* GStreamer AVTP Plugin
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* Copyright (C) 2019 Intel Corporation
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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
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* 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
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* Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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* Boston, MA 02110-1301 USA
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*/
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#ifndef __GST_AVTP_BASE_DEPAYLOAD_H__
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#define __GST_AVTP_BASE_DEPAYLOAD_H__
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#include <gst/gst.h>
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G_BEGIN_DECLS
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#define GST_TYPE_AVTP_BASE_DEPAYLOAD (gst_avtp_base_depayload_get_type())
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#define GST_AVTP_BASE_DEPAYLOAD(obj) \
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(G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_AVTP_BASE_DEPAYLOAD,GstAvtpBaseDepayload))
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#define GST_AVTP_BASE_DEPAYLOAD_CLASS(klass) \
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(G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_AVTP_BASE_DEPAYLOAD,GstAvtpBaseDepayloadClass))
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#define GST_IS_AVTP_BASE_DEPAYLOAD(obj) \
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(G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_AVTP_BASE_DEPAYLOAD))
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#define GST_IS_AVTP_BASE_DEPAYLOAD_CLASS(klass) \
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(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_AVTP_BASE_DEPAYLOAD))
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typedef struct _GstAvtpBaseDepayload GstAvtpBaseDepayload;
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typedef struct _GstAvtpBaseDepayloadClass GstAvtpBaseDepayloadClass;
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struct _GstAvtpBaseDepayload
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{
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GstElement element;
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GstPad *sinkpad;
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GstPad *srcpad;
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guint64 streamid;
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GstClockTime prev_ptime;
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guint8 seqnum;
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gpointer _gst_reserved[GST_PADDING];
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};
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struct _GstAvtpBaseDepayloadClass
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{
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GstElementClass parent_class;
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/* Pure virtual function. */
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GstPadChainFunction chain;
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GstPadEventFunction sink_event;
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gpointer _gst_reserved[GST_PADDING];
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};
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GType gst_avtp_base_depayload_get_type (void);
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GstClockTime gst_avtp_base_depayload_tstamp_to_ptime (GstAvtpBaseDepayload *
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avtpbasedepayload, guint32 tstamp, GstClockTime ref);
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gboolean gst_avtp_base_depayload_push_segment_event (GstAvtpBaseDepayload *
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avtpbasedepayload, guint32 avtp_tstamp);
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G_END_DECLS
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#endif /* __GST_AVTP_BASE_DEPAYLOAD_H__ */
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