--- /dev/null
+/* GStreamer
+ * Copyright (C) <2022> Sebastian Dröge <sebastian@centricular.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.
+ */
+
+/**
+ * SECTION:element-rtphdrextntp64
+ * @title: rtphdrextntp64
+ * @short_description: RTP Header Extension for RFC6051 64-bit NTP timestamps for rapid synchronization.
+ * @see_also: #GstRTPHeaderExtension, #GstRTPBasePayload, #GstRTPBaseDepayload, gstrtpbuffer
+ *
+ * Since: 1.22
+ */
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <gst/rtp/gstrtpbuffer.h>
+
+#include "gstrtphdrext-ntp.h"
+
+GST_DEBUG_CATEGORY_STATIC (rtphdrext_ntp_debug);
+#define GST_CAT_DEFAULT (rtphdrext_ntp_debug)
+
+enum
+{
+ PROP_0,
+ PROP_INTERVAL,
+ PROP_EVERY_PACKET,
+};
+
+#define DEFAULT_INTERVAL 0
+#define DEFAULT_EVERY_PACKET FALSE
+
+static GstStaticCaps ntp_reference_timestamp_caps =
+GST_STATIC_CAPS ("timestamp/x-ntp");
+
+struct _GstRTPHeaderExtensionNtp64
+{
+ GstRTPHeaderExtension parent;
+
+ GstClockTime last_pts;
+
+ GstClockTime interval;
+ gboolean every_packet;
+};
+
+G_DEFINE_TYPE_WITH_CODE (GstRTPHeaderExtensionNtp64,
+ gst_rtp_header_extension_ntp_64,
+ GST_TYPE_RTP_HEADER_EXTENSION, GST_DEBUG_CATEGORY_INIT (GST_CAT_DEFAULT,
+ "rtphdrextntp", 0, "RTP RFC6051 NTP Timestamps Header Extension");
+ );
+
+GST_ELEMENT_REGISTER_DEFINE (rtphdrextntp64,
+ "rtphdrextntp64", GST_RANK_MARGINAL, GST_TYPE_RTP_HEADER_EXTENSION_NTP_64);
+
+static GstRTPHeaderExtensionFlags
+ gst_rtp_header_extension_ntp_get_supported_flags
+ (GstRTPHeaderExtension * ext)
+{
+ return GST_RTP_HEADER_EXTENSION_ONE_BYTE | GST_RTP_HEADER_EXTENSION_TWO_BYTE;
+}
+
+static gsize
+ gst_rtp_header_extension_ntp_64_get_max_size
+ (GstRTPHeaderExtension * ext, const GstBuffer * buffer)
+{
+ return 8;
+}
+
+static gssize
+gst_rtp_header_extension_ntp_64_write (GstRTPHeaderExtension
+ * ext, const GstBuffer * input_meta, GstRTPHeaderExtensionFlags write_flags,
+ GstBuffer * output, guint8 * data, gsize size)
+{
+ GstRTPHeaderExtensionNtp64 *self = GST_RTP_HEADER_EXTENSION_NTP_64 (ext);
+
+ g_return_val_if_fail (size >=
+ gst_rtp_header_extension_ntp_64_get_max_size (ext, NULL), -1);
+ g_return_val_if_fail (write_flags &
+ gst_rtp_header_extension_ntp_get_supported_flags (ext), -1);
+
+ if (self->every_packet
+ || self->last_pts == GST_CLOCK_TIME_NONE
+ || !GST_BUFFER_PTS_IS_VALID (input_meta)
+ || (self->last_pts != GST_BUFFER_PTS (input_meta)
+ && (GST_BUFFER_IS_DISCONT (input_meta)
+ || (GST_BUFFER_PTS (input_meta) >= self->last_pts
+ && GST_BUFFER_PTS (input_meta) - self->last_pts >=
+ self->interval)))) {
+ GstCaps *caps;
+ GstReferenceTimestampMeta *meta;
+
+ caps = gst_static_caps_get (&ntp_reference_timestamp_caps);
+ meta =
+ gst_buffer_get_reference_timestamp_meta ((GstBuffer *) input_meta,
+ caps);
+ if (meta) {
+ guint64 ntptime =
+ gst_util_uint64_scale (meta->timestamp, G_GUINT64_CONSTANT (1) << 32,
+ GST_SECOND);
+
+ GST_WRITE_UINT64_BE (data, ntptime);
+ } else {
+ memset (data, 0, 8);
+ }
+ gst_caps_unref (caps);
+ self->last_pts = GST_BUFFER_PTS (input_meta);
+ return 8;
+ } else {
+ return 0;
+ }
+}
+
+static gboolean
+gst_rtp_header_extension_ntp_64_read (GstRTPHeaderExtension
+ * ext, GstRTPHeaderExtensionFlags read_flags, const guint8 * data,
+ gsize size, GstBuffer * buffer)
+{
+ GstCaps *caps;
+ guint64 ntptime;
+ GstClockTime timestamp;
+
+ if (size < 8)
+ return FALSE;
+
+ caps = gst_static_caps_get (&ntp_reference_timestamp_caps);
+
+ ntptime = GST_READ_UINT64_BE (data);
+ timestamp =
+ gst_util_uint64_scale (ntptime, GST_SECOND, G_GUINT64_CONSTANT (1) << 32);
+
+ gst_buffer_add_reference_timestamp_meta (buffer, caps, timestamp,
+ GST_CLOCK_TIME_NONE);
+
+ gst_caps_unref (caps);
+
+ return TRUE;
+}
+
+
+static void
+gst_rtp_header_extension_ntp_64_get_property (GObject *
+ object, guint prop_id, GValue * value, GParamSpec * pspec)
+{
+ GstRTPHeaderExtensionNtp64 *self = GST_RTP_HEADER_EXTENSION_NTP_64 (object);
+
+ switch (prop_id) {
+ case PROP_INTERVAL:
+ GST_OBJECT_LOCK (self);
+ g_value_set_uint64 (value, self->interval);
+ GST_OBJECT_UNLOCK (self);
+ break;
+ case PROP_EVERY_PACKET:
+ GST_OBJECT_LOCK (self);
+ g_value_set_boolean (value, self->every_packet);
+ GST_OBJECT_UNLOCK (self);
+ break;
+ default:
+ G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+ break;
+ }
+}
+
+static void
+gst_rtp_header_extension_ntp_64_set_property (GObject *
+ object, guint prop_id, const GValue * value, GParamSpec * pspec)
+{
+ GstRTPHeaderExtensionNtp64 *self = GST_RTP_HEADER_EXTENSION_NTP_64 (object);
+
+ switch (prop_id) {
+ case PROP_INTERVAL:
+ GST_OBJECT_LOCK (self);
+ self->interval = g_value_get_uint64 (value);
+ GST_OBJECT_UNLOCK (self);
+ break;
+ case PROP_EVERY_PACKET:
+ GST_OBJECT_LOCK (self);
+ self->every_packet = g_value_get_boolean (value);
+ GST_OBJECT_UNLOCK (self);
+ break;
+ default:
+ G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+ break;
+ }
+}
+
+static void
+ gst_rtp_header_extension_ntp_64_class_init
+ (GstRTPHeaderExtensionNtp64Class * klass)
+{
+ GstRTPHeaderExtensionClass *rtp_hdr_class;
+ GstElementClass *gstelement_class;
+ GObjectClass *gobject_class;
+
+ rtp_hdr_class = (GstRTPHeaderExtensionClass *) klass;
+ gobject_class = (GObjectClass *) klass;
+ gstelement_class = (GstElementClass *) klass;
+
+ gobject_class->set_property = gst_rtp_header_extension_ntp_64_set_property;
+ gobject_class->get_property = gst_rtp_header_extension_ntp_64_get_property;
+
+ /**
+ * rtphdrextntp64:interval:
+ *
+ * The minimum interval between packets that get the header extension added.
+ *
+ * On discontinuities the interval will be reset and the next packet gets
+ * the header extension added.
+ *
+ * Since: 1.22
+ */
+ g_object_class_install_property (gobject_class, PROP_INTERVAL,
+ g_param_spec_uint64 ("interval", "Interval",
+ "Interval between consecutive packets that get the header extension added",
+ 0, G_MAXUINT64, DEFAULT_INTERVAL,
+ G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
+
+ /**
+ * rtphdrextntp64:every-packet:
+ *
+ * If set to %TRUE the header extension will be added to every packet,
+ * independent of its timestamp. By default only the first packet with a
+ * given timestamp will get the header extension added.
+ *
+ * Since: 1.22
+ */
+ g_object_class_install_property (gobject_class, PROP_EVERY_PACKET,
+ g_param_spec_boolean ("every-packet", "Every Packet",
+ "Add the header extension to every packet", DEFAULT_EVERY_PACKET,
+ G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
+
+ rtp_hdr_class->get_supported_flags =
+ gst_rtp_header_extension_ntp_get_supported_flags;
+ rtp_hdr_class->get_max_size = gst_rtp_header_extension_ntp_64_get_max_size;
+ rtp_hdr_class->write = gst_rtp_header_extension_ntp_64_write;
+ rtp_hdr_class->read = gst_rtp_header_extension_ntp_64_read;
+
+ gst_element_class_set_static_metadata (gstelement_class,
+ "RTP Header Extension RFC6051 64-bit NTP timestamp",
+ GST_RTP_HDREXT_ELEMENT_CLASS,
+ "Extends RTP packets to add or retrieve a 64-bit NTP "
+ "timestamp as specified in RFC6501",
+ "Sebastian Dröge <sebastian@centricular.com>");
+ gst_rtp_header_extension_class_set_uri (rtp_hdr_class,
+ GST_RTP_HDREXT_BASE GST_RTP_HDREXT_NTP_64);
+}
+
+static void
+gst_rtp_header_extension_ntp_64_init (GstRTPHeaderExtensionNtp64 * self)
+{
+ self->last_pts = GST_CLOCK_TIME_NONE;
+ self->interval = DEFAULT_INTERVAL;
+ self->every_packet = DEFAULT_EVERY_PACKET;
+}
projects / platform / upstream / gstreamer.git / commitdiff