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118 lines
3.3 KiB
C
118 lines
3.3 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 Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 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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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library 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 St, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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#include <avtp.h>
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#include <avtp_aaf.h>
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#include <avtp_cvf.h>
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#include <glib.h>
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#include "gstavtpcrfutil.h"
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#define AVTP_CVF_H264_HEADER_SIZE (sizeof(struct avtp_stream_pdu) + sizeof(guint32))
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gboolean
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buffer_size_valid (GstMapInfo * info)
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{
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struct avtp_stream_pdu *pdu;
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guint64 subtype;
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guint32 type;
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int res;
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if (info->size < sizeof (struct avtp_stream_pdu))
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return FALSE;
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pdu = (struct avtp_stream_pdu *) info->data;
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res =
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avtp_pdu_get ((struct avtp_common_pdu *) pdu, AVTP_FIELD_SUBTYPE, &type);
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g_assert (res == 0);
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res = avtp_cvf_pdu_get (pdu, AVTP_CVF_FIELD_FORMAT_SUBTYPE, &subtype);
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g_assert (res == 0);
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if (type == AVTP_SUBTYPE_CVF && subtype == AVTP_CVF_FORMAT_SUBTYPE_H264
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&& info->size < AVTP_CVF_H264_HEADER_SIZE)
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return FALSE;
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return TRUE;
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}
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GstClockTime
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get_avtp_tstamp (GstAvtpCrfBase * avtpcrfbase, struct avtp_stream_pdu * pdu)
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{
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guint64 tstamp = GST_CLOCK_TIME_NONE, tstamp_valid;
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guint32 type;
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int res;
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res =
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avtp_pdu_get ((struct avtp_common_pdu *) pdu, AVTP_FIELD_SUBTYPE, &type);
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g_assert (res == 0);
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switch (type) {
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case AVTP_SUBTYPE_AAF:
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res = avtp_aaf_pdu_get (pdu, AVTP_AAF_FIELD_TV, &tstamp_valid);
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g_assert (res == 0);
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if (!tstamp_valid)
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break;
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res = avtp_aaf_pdu_get (pdu, AVTP_AAF_FIELD_TIMESTAMP, &tstamp);
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g_assert (res == 0);
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break;
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case AVTP_SUBTYPE_CVF:
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res = avtp_cvf_pdu_get (pdu, AVTP_CVF_FIELD_TV, &tstamp_valid);
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g_assert (res == 0);
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if (!tstamp_valid)
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break;
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res = avtp_cvf_pdu_get (pdu, AVTP_CVF_FIELD_TIMESTAMP, &tstamp);
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g_assert (res == 0);
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break;
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default:
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GST_INFO_OBJECT (avtpcrfbase, "type 0x%x not supported.\n", type);
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break;
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}
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return (GstClockTime) tstamp;
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}
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gboolean
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h264_tstamp_valid (struct avtp_stream_pdu * pdu)
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{
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guint64 subtype, h264_time_valid;
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guint32 type;
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int res;
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/*
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* Validate H264 timestamp for H264 format. For more details about the
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* timestamp look at IEEE 1722-2016 Section 8.5.3.1
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*/
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res =
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avtp_pdu_get ((struct avtp_common_pdu *) pdu, AVTP_FIELD_SUBTYPE, &type);
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g_assert (res == 0);
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if (type == AVTP_SUBTYPE_CVF) {
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res = avtp_cvf_pdu_get (pdu, AVTP_CVF_FIELD_FORMAT_SUBTYPE, &subtype);
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g_assert (res == 0);
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res = avtp_cvf_pdu_get (pdu, AVTP_CVF_FIELD_H264_PTV, &h264_time_valid);
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g_assert (res == 0);
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if (subtype == AVTP_CVF_FORMAT_SUBTYPE_H264 && h264_time_valid)
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return TRUE;
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}
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return FALSE;
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}
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