gstreamer/subprojects/gst-plugins-bad/ext/avtp/gstavtpcrfutil.c

117 lines
3.3 KiB
C

/*
* GStreamer AVTP Plugin
* Copyright (C) 2019 Intel Corporation
*
* 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., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#include <avtp.h>
#include <avtp_aaf.h>
#include <avtp_cvf.h>
#include <glib.h>
#include "gstavtpcrfutil.h"
#define AVTP_CVF_H264_HEADER_SIZE (sizeof(struct avtp_stream_pdu) + sizeof(guint32))
gboolean
buffer_size_valid (GstMapInfo * info)
{
struct avtp_stream_pdu *pdu;
guint64 subtype;
guint32 type;
int res;
if (info->size < sizeof (struct avtp_stream_pdu))
return FALSE;
pdu = (struct avtp_stream_pdu *) info->data;
res =
avtp_pdu_get ((struct avtp_common_pdu *) pdu, AVTP_FIELD_SUBTYPE, &type);
g_assert (res == 0);
res = avtp_cvf_pdu_get (pdu, AVTP_CVF_FIELD_FORMAT_SUBTYPE, &subtype);
g_assert (res == 0);
if (type == AVTP_SUBTYPE_CVF && subtype == AVTP_CVF_FORMAT_SUBTYPE_H264
&& info->size < AVTP_CVF_H264_HEADER_SIZE)
return FALSE;
return TRUE;
}
GstClockTime
get_avtp_tstamp (GstAvtpCrfBase * avtpcrfbase, struct avtp_stream_pdu * pdu)
{
guint64 tstamp = GST_CLOCK_TIME_NONE, tstamp_valid;
guint32 type;
int res;
res =
avtp_pdu_get ((struct avtp_common_pdu *) pdu, AVTP_FIELD_SUBTYPE, &type);
g_assert (res == 0);
switch (type) {
case AVTP_SUBTYPE_AAF:
res = avtp_aaf_pdu_get (pdu, AVTP_AAF_FIELD_TV, &tstamp_valid);
g_assert (res == 0);
if (!tstamp_valid)
break;
res = avtp_aaf_pdu_get (pdu, AVTP_AAF_FIELD_TIMESTAMP, &tstamp);
g_assert (res == 0);
break;
case AVTP_SUBTYPE_CVF:
res = avtp_cvf_pdu_get (pdu, AVTP_CVF_FIELD_TV, &tstamp_valid);
g_assert (res == 0);
if (!tstamp_valid)
break;
res = avtp_cvf_pdu_get (pdu, AVTP_CVF_FIELD_TIMESTAMP, &tstamp);
g_assert (res == 0);
break;
default:
GST_INFO_OBJECT (avtpcrfbase, "type 0x%x not supported.\n", type);
break;
}
return (GstClockTime) tstamp;
}
gboolean
h264_tstamp_valid (struct avtp_stream_pdu * pdu)
{
guint64 subtype, h264_time_valid;
guint32 type;
int res;
/*
* Validate H264 timestamp for H264 format. For more details about the
* timestamp look at IEEE 1722-2016 Section 8.5.3.1
*/
res =
avtp_pdu_get ((struct avtp_common_pdu *) pdu, AVTP_FIELD_SUBTYPE, &type);
g_assert (res == 0);
if (type == AVTP_SUBTYPE_CVF) {
res = avtp_cvf_pdu_get (pdu, AVTP_CVF_FIELD_FORMAT_SUBTYPE, &subtype);
g_assert (res == 0);
res = avtp_cvf_pdu_get (pdu, AVTP_CVF_FIELD_H264_PTV, &h264_time_valid);
g_assert (res == 0);
if (subtype == AVTP_CVF_FORMAT_SUBTYPE_H264 && h264_time_valid)
return TRUE;
}
return FALSE;
}