/* GStreamer
* Copyright (C) <2007> Wim Taymans <wim.taymans@gmail.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.
*/
#include <string.h>
#include <gst/rtp/gstrtpbuffer.h>
#include <gst/rtp/gstrtcpbuffer.h>
#include "rtpsource.h"
GST_DEBUG_CATEGORY_STATIC (rtp_source_debug);
#define GST_CAT_DEFAULT rtp_source_debug
#define RTP_MAX_PROBATION_LEN 32
/* signals and args */
enum
{
LAST_SIGNAL
};
#define DEFAULT_SSRC 0
#define DEFAULT_IS_CSRC FALSE
#define DEFAULT_IS_VALIDATED FALSE
#define DEFAULT_IS_SENDER FALSE
#define DEFAULT_SDES NULL
enum
{
PROP_0,
PROP_SSRC,
PROP_IS_CSRC,
PROP_IS_VALIDATED,
PROP_IS_SENDER,
PROP_SDES,
PROP_STATS,
PROP_LAST
};
/* GObject vmethods */
static void rtp_source_finalize (GObject * object);
static void rtp_source_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec);
static void rtp_source_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec);
/* static guint rtp_source_signals[LAST_SIGNAL] = { 0 }; */
G_DEFINE_TYPE (RTPSource, rtp_source, G_TYPE_OBJECT);
static void
rtp_source_class_init (RTPSourceClass * klass)
{
GObjectClass *gobject_class;
gobject_class = (GObjectClass *) klass;
gobject_class->finalize = rtp_source_finalize;
gobject_class->set_property = rtp_source_set_property;
gobject_class->get_property = rtp_source_get_property;
g_object_class_install_property (gobject_class, PROP_SSRC,
g_param_spec_uint ("ssrc", "SSRC",
"The SSRC of this source", 0, G_MAXUINT, DEFAULT_SSRC,
G_PARAM_READWRITE | G_PARAM_CONSTRUCT_ONLY | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_IS_CSRC,
g_param_spec_boolean ("is-csrc", "Is CSRC",
"If this SSRC is acting as a contributing source",
DEFAULT_IS_CSRC, G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_IS_VALIDATED,
g_param_spec_boolean ("is-validated", "Is Validated",
"If this SSRC is validated", DEFAULT_IS_VALIDATED,
G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_IS_SENDER,
g_param_spec_boolean ("is-sender", "Is Sender",
"If this SSRC is a sender", DEFAULT_IS_SENDER,
G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
/**
* RTPSource::sdes
*
* The current SDES items of the source. Returns a structure with the
* following fields:
*
* 'cname' G_TYPE_STRING : The canonical name
* 'name' G_TYPE_STRING : The user name
* 'email' G_TYPE_STRING : The user's electronic mail address
* 'phone' G_TYPE_STRING : The user's phone number
* 'location' G_TYPE_STRING : The geographic user location
* 'tool' G_TYPE_STRING : The name of application or tool
* 'note' G_TYPE_STRING : A notice about the source
*/
g_object_class_install_property (gobject_class, PROP_SDES,
g_param_spec_boxed ("sdes", "SDES",
"The SDES information for this source",
GST_TYPE_STRUCTURE, G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
/**
* RTPSource::stats
*
* The statistics of the source. This property returns a GstStructure with
* name application/x-rtp-source-stats with the following fields:
*
*/
g_object_class_install_property (gobject_class, PROP_STATS,
g_param_spec_boxed ("stats", "Stats",
"The stats of this source", GST_TYPE_STRUCTURE,
G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
GST_DEBUG_CATEGORY_INIT (rtp_source_debug, "rtpsource", 0, "RTP Source");
}
/**
* rtp_source_reset:
* @src: an #RTPSource
*
* Reset the stats of @src.
*/
void
rtp_source_reset (RTPSource * src)
{
src->received_bye = FALSE;
src->stats.cycles = -1;
src->stats.jitter = 0;
src->stats.transit = -1;
src->stats.curr_sr = 0;
src->stats.curr_rr = 0;
}
static void
rtp_source_init (RTPSource * src)
{
/* sources are initialy on probation until we receive enough valid RTP
* packets or a valid RTCP packet */
src->validated = FALSE;
src->internal = FALSE;
src->probation = RTP_DEFAULT_PROBATION;
src->payload = -1;
src->clock_rate = -1;
src->packets = g_queue_new ();
src->seqnum_base = -1;
src->last_rtptime = -1;
rtp_source_reset (src);
}
static void
rtp_source_finalize (GObject * object)
{
RTPSource *src;
GstBuffer *buffer;
gint i;
src = RTP_SOURCE_CAST (object);
while ((buffer = g_queue_pop_head (src->packets)))
gst_buffer_unref (buffer);
g_queue_free (src->packets);
for (i = 0; i < 9; i++)
g_free (src->sdes[i]);
g_free (src->bye_reason);
gst_caps_replace (&src->caps, NULL);
G_OBJECT_CLASS (rtp_source_parent_class)->finalize (object);
}
static GstStructure *
rtp_source_create_stats (RTPSource * src)
{
GstStructure *s;
gboolean is_sender = src->is_sender;
gboolean internal = src->internal;
gchar address_str[GST_NETADDRESS_MAX_LEN];
/* common data for all types of sources */
s = gst_structure_new ("application/x-rtp-source-stats",
"ssrc", G_TYPE_UINT, (guint) src->ssrc,
"internal", G_TYPE_BOOLEAN, internal,
"validated", G_TYPE_BOOLEAN, src->validated,
"received-bye", G_TYPE_BOOLEAN, src->received_bye,
"is-csrc", G_TYPE_BOOLEAN, src->is_csrc,
"is-sender", G_TYPE_BOOLEAN, is_sender, NULL);
/* add address and port */
if (src->have_rtp_from) {
gst_netaddress_to_string (&src->rtp_from, address_str,
sizeof (address_str));
gst_structure_set (s, "rtp-from", G_TYPE_STRING, address_str, NULL);
}
if (src->have_rtcp_from) {
gst_netaddress_to_string (&src->rtcp_from, address_str,
sizeof (address_str));
gst_structure_set (s, "rtcp-from", G_TYPE_STRING, address_str, NULL);
}
if (internal) {
/* our internal source */
if (is_sender) {
/* if we are sending, report about how much we sent, other sources will
* have a RB with info on reception. */
gst_structure_set (s,
"octets-sent", G_TYPE_UINT64, src->stats.octets_sent,
"packets-sent", G_TYPE_UINT64, src->stats.packets_sent,
"bitrate", G_TYPE_UINT64, src->bitrate, NULL);
} else {
/* if we are not sending we have nothing more to report */
}
} else {
gboolean have_rb;
guint8 fractionlost = 0;
gint32 packetslost = 0;
guint32 exthighestseq = 0;
guint32 jitter = 0;
guint32 lsr = 0;
guint32 dlsr = 0;
guint32 round_trip = 0;
/* other sources */
if (is_sender) {
gboolean have_sr;
GstClockTime time = 0;
guint64 ntptime = 0;
guint32 rtptime = 0;
guint32 packet_count = 0;
guint32 octet_count = 0;
/* this source is sending to us, get the last SR. */
have_sr = rtp_source_get_last_sr (src, &time, &ntptime, &rtptime,
&packet_count, &octet_count);
gst_structure_set (s,
"octets-received", G_TYPE_UINT64, src->stats.octets_received,
"packets-received", G_TYPE_UINT64, src->stats.packets_received,
"have-sr", G_TYPE_BOOLEAN, have_sr,
"sr-ntptime", G_TYPE_UINT64, ntptime,
"sr-rtptime", G_TYPE_UINT, (guint) rtptime,
"sr-octet-count", G_TYPE_UINT, (guint) octet_count,
"sr-packet-count", G_TYPE_UINT, (guint) packet_count, NULL);
}
/* we might be sending to this SSRC so we report about how it is
* receiving our data */
have_rb = rtp_source_get_last_rb (src, &fractionlost, &packetslost,
&exthighestseq, &jitter, &lsr, &dlsr, &round_trip);
gst_structure_set (s,
"have-rb", G_TYPE_BOOLEAN, have_rb,
"rb-fractionlost", G_TYPE_UINT, (guint) fractionlost,
"rb-packetslost", G_TYPE_INT, (gint) packetslost,
"rb-exthighestseq", G_TYPE_UINT, (guint) exthighestseq,
"rb-jitter", G_TYPE_UINT, (guint) jitter,
"rb-lsr", G_TYPE_UINT, (guint) lsr,
"rb-dlsr", G_TYPE_UINT, (guint) dlsr,
"rb-round-trip", G_TYPE_UINT, (guint) round_trip, NULL);
}
return s;
}
/**
* rtp_source_get_sdes_struct:
* @src: an #RTSPSource
*
* Get the SDES data as a GstStructure
*
* Returns: a GstStructure with SDES items for @src.
*/
GstStructure *
rtp_source_get_sdes_struct (RTPSource * src)
{
GstStructure *s;
gchar *str;
s = gst_structure_new ("application/x-rtp-source-sdes",
"ssrc", G_TYPE_UINT, (guint) src->ssrc, NULL);
if ((str = rtp_source_get_sdes_string (src, GST_RTCP_SDES_CNAME))) {
gst_structure_set (s, "cname", G_TYPE_STRING, str, NULL);
g_free (str);
}
if ((str = rtp_source_get_sdes_string (src, GST_RTCP_SDES_NAME))) {
gst_structure_set (s, "name", G_TYPE_STRING, str, NULL);
g_free (str);
}
if ((str = rtp_source_get_sdes_string (src, GST_RTCP_SDES_EMAIL))) {
gst_structure_set (s, "email", G_TYPE_STRING, str, NULL);
g_free (str);
}
if ((str = rtp_source_get_sdes_string (src, GST_RTCP_SDES_PHONE))) {
gst_structure_set (s, "phone", G_TYPE_STRING, str, NULL);
g_free (str);
}
if ((str = rtp_source_get_sdes_string (src, GST_RTCP_SDES_LOC))) {
gst_structure_set (s, "location", G_TYPE_STRING, str, NULL);
g_free (str);
}
if ((str = rtp_source_get_sdes_string (src, GST_RTCP_SDES_TOOL))) {
gst_structure_set (s, "tool", G_TYPE_STRING, str, NULL);
g_free (str);
}
if ((str = rtp_source_get_sdes_string (src, GST_RTCP_SDES_NOTE))) {
gst_structure_set (s, "note", G_TYPE_STRING, str, NULL);
g_free (str);
}
return s;
}
/**
* rtp_source_set_sdes_struct:
* @src: an #RTSPSource
* @sdes: a #GstStructure with SDES info
*
* Set the SDES items from @sdes.
*/
void
rtp_source_set_sdes_struct (RTPSource * src, const GstStructure * sdes)
{
const gchar *str;
if (!gst_structure_has_name (sdes, "application/x-rtp-source-sdes"))
return;
if ((str = gst_structure_get_string (sdes, "cname"))) {
rtp_source_set_sdes_string (src, GST_RTCP_SDES_CNAME, str);
}
if ((str = gst_structure_get_string (sdes, "name"))) {
rtp_source_set_sdes_string (src, GST_RTCP_SDES_NAME, str);
}
if ((str = gst_structure_get_string (sdes, "email"))) {
rtp_source_set_sdes_string (src, GST_RTCP_SDES_EMAIL, str);
}
if ((str = gst_structure_get_string (sdes, "phone"))) {
rtp_source_set_sdes_string (src, GST_RTCP_SDES_PHONE, str);
}
if ((str = gst_structure_get_string (sdes, "location"))) {
rtp_source_set_sdes_string (src, GST_RTCP_SDES_LOC, str);
}
if ((str = gst_structure_get_string (sdes, "tool"))) {
rtp_source_set_sdes_string (src, GST_RTCP_SDES_TOOL, str);
}
if ((str = gst_structure_get_string (sdes, "note"))) {
rtp_source_set_sdes_string (src, GST_RTCP_SDES_NOTE, str);
}
}
static void
rtp_source_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
RTPSource *src;
src = RTP_SOURCE (object);
switch (prop_id) {
case PROP_SSRC:
src->ssrc = g_value_get_uint (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
rtp_source_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec)
{
RTPSource *src;
src = RTP_SOURCE (object);
switch (prop_id) {
case PROP_SSRC:
g_value_set_uint (value, rtp_source_get_ssrc (src));
break;
case PROP_IS_CSRC:
g_value_set_boolean (value, rtp_source_is_as_csrc (src));
break;
case PROP_IS_VALIDATED:
g_value_set_boolean (value, rtp_source_is_validated (src));
break;
case PROP_IS_SENDER:
g_value_set_boolean (value, rtp_source_is_sender (src));
break;
case PROP_SDES:
g_value_take_boxed (value, rtp_source_get_sdes_struct (src));
break;
case PROP_STATS:
g_value_take_boxed (value, rtp_source_create_stats (src));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
/**
* rtp_source_new:
* @ssrc: an SSRC
*
* Create a #RTPSource with @ssrc.
*
* Returns: a new #RTPSource. Use g_object_unref() after usage.
*/
RTPSource *
rtp_source_new (guint32 ssrc)
{
RTPSource *src;
src = g_object_new (RTP_TYPE_SOURCE, NULL);
src->ssrc = ssrc;
return src;
}
/**
* rtp_source_set_callbacks:
* @src: an #RTPSource
* @cb: callback functions
* @user_data: user data
*
* Set the callbacks for the source.
*/
void
rtp_source_set_callbacks (RTPSource * src, RTPSourceCallbacks * cb,
gpointer user_data)
{
g_return_if_fail (RTP_IS_SOURCE (src));
src->callbacks.push_rtp = cb->push_rtp;
src->callbacks.clock_rate = cb->clock_rate;
src->user_data = user_data;
}
/**
* rtp_source_get_ssrc:
* @src: an #RTPSource
*
* Get the SSRC of @source.
*
* Returns: the SSRC of src.
*/
guint32
rtp_source_get_ssrc (RTPSource * src)
{
guint32 result;
g_return_val_if_fail (RTP_IS_SOURCE (src), 0);
result = src->ssrc;
return result;
}
/**
* rtp_source_set_as_csrc:
* @src: an #RTPSource
*
* Configure @src as a CSRC, this will also validate @src.
*/
void
rtp_source_set_as_csrc (RTPSource * src)
{
g_return_if_fail (RTP_IS_SOURCE (src));
src->validated = TRUE;
src->is_csrc = TRUE;
}
/**
* rtp_source_is_as_csrc:
* @src: an #RTPSource
*
* Check if @src is a contributing source.
*
* Returns: %TRUE if @src is acting as a contributing source.
*/
gboolean
rtp_source_is_as_csrc (RTPSource * src)
{
gboolean result;
g_return_val_if_fail (RTP_IS_SOURCE (src), FALSE);
result = src->is_csrc;
return result;
}
/**
* rtp_source_is_active:
* @src: an #RTPSource
*
* Check if @src is an active source. A source is active if it has been
* validated and has not yet received a BYE packet
*
* Returns: %TRUE if @src is an qactive source.
*/
gboolean
rtp_source_is_active (RTPSource * src)
{
gboolean result;
g_return_val_if_fail (RTP_IS_SOURCE (src), FALSE);
result = RTP_SOURCE_IS_ACTIVE (src);
return result;
}
/**
* rtp_source_is_validated:
* @src: an #RTPSource
*
* Check if @src is a validated source.
*
* Returns: %TRUE if @src is a validated source.
*/
gboolean
rtp_source_is_validated (RTPSource * src)
{
gboolean result;
g_return_val_if_fail (RTP_IS_SOURCE (src), FALSE);
result = src->validated;
return result;
}
/**
* rtp_source_is_sender:
* @src: an #RTPSource
*
* Check if @src is a sending source.
*
* Returns: %TRUE if @src is a sending source.
*/
gboolean
rtp_source_is_sender (RTPSource * src)
{
gboolean result;
g_return_val_if_fail (RTP_IS_SOURCE (src), FALSE);
result = RTP_SOURCE_IS_SENDER (src);
return result;
}
/**
* rtp_source_received_bye:
* @src: an #RTPSource
*
* Check if @src has receoved a BYE packet.
*
* Returns: %TRUE if @src has received a BYE packet.
*/
gboolean
rtp_source_received_bye (RTPSource * src)
{
gboolean result;
g_return_val_if_fail (RTP_IS_SOURCE (src), FALSE);
result = src->received_bye;
return result;
}
/**
* rtp_source_get_bye_reason:
* @src: an #RTPSource
*
* Get the BYE reason for @src. Check if the source receoved a BYE message first
* with rtp_source_received_bye().
*
* Returns: The BYE reason or NULL when no reason was given or the source did
* not receive a BYE message yet. g_fee() after usage.
*/
gchar *
rtp_source_get_bye_reason (RTPSource * src)
{
gchar *result;
g_return_val_if_fail (RTP_IS_SOURCE (src), NULL);
result = g_strdup (src->bye_reason);
return result;
}
/**
* rtp_source_update_caps:
* @src: an #RTPSource
* @caps: a #GstCaps
*
* Parse @caps and store all relevant information in @source.
*/
void
rtp_source_update_caps (RTPSource * src, GstCaps * caps)
{
GstStructure *s;
guint val;
gint ival;
/* nothing changed, return */
if (src->caps == caps)
return;
s = gst_caps_get_structure (caps, 0);
if (gst_structure_get_int (s, "payload", &ival))
src->payload = ival;
else
src->payload = -1;
GST_DEBUG ("got payload %d", src->payload);
if (gst_structure_get_int (s, "clock-rate", &ival))
src->clock_rate = ival;
else
src->clock_rate = -1;
GST_DEBUG ("got clock-rate %d", src->clock_rate);
if (gst_structure_get_uint (s, "seqnum-base", &val))
src->seqnum_base = val;
else
src->seqnum_base = -1;
GST_DEBUG ("got seqnum-base %" G_GINT32_FORMAT, src->seqnum_base);
gst_caps_replace (&src->caps, caps);
}
/**
* rtp_source_set_sdes:
* @src: an #RTPSource
* @type: the type of the SDES item
* @data: the SDES data
* @len: the SDES length
*
* Store an SDES item of @type in @src.
*
* Returns: %FALSE if the SDES item was unchanged or @type is unknown.
*/
gboolean
rtp_source_set_sdes (RTPSource * src, GstRTCPSDESType type,
const guint8 * data, guint len)
{
guint8 *old;
g_return_val_if_fail (RTP_IS_SOURCE (src), FALSE);
if (type < 0 || type > GST_RTCP_SDES_PRIV)
return FALSE;
old = src->sdes[type];
/* lengths are the same, check if the data is the same */
if ((src->sdes_len[type] == len))
if (data != NULL && old != NULL && (memcmp (old, data, len) == 0))
return FALSE;
/* NULL data, make sure we store 0 length or if no length is given,
* take strlen */
if (data == NULL)
len = 0;
g_free (src->sdes[type]);
src->sdes[type] = g_memdup (data, len);
src->sdes_len[type] = len;
return TRUE;
}
/**
* rtp_source_set_sdes_string:
* @src: an #RTPSource
* @type: the type of the SDES item
* @data: the SDES data
*
* Store an SDES item of @type in @src. This function is similar to
* rtp_source_set_sdes() but takes a null-terminated string for convenience.
*
* Returns: %FALSE if the SDES item was unchanged or @type is unknown.
*/
gboolean
rtp_source_set_sdes_string (RTPSource * src, GstRTCPSDESType type,
const gchar * data)
{
guint len;
gboolean result;
if (data)
len = strlen (data);
else
len = 0;
result = rtp_source_set_sdes (src, type, (guint8 *) data, len);
return result;
}
/**
* rtp_source_get_sdes:
* @src: an #RTPSource
* @type: the type of the SDES item
* @data: location to store the SDES data or NULL
* @len: location to store the SDES length or NULL
*
* Get the SDES item of @type from @src. Note that @data does not always point
* to a null-terminated string, use rtp_source_get_sdes_string() to retrieve a
* null-terminated string instead.
*
* @data remains valid until the next call to rtp_source_set_sdes().
*
* Returns: %TRUE if @type was valid and @data and @len contain valid
* data. @data can be NULL when the item was unset.
*/
gboolean
rtp_source_get_sdes (RTPSource * src, GstRTCPSDESType type, guint8 ** data,
guint * len)
{
g_return_val_if_fail (RTP_IS_SOURCE (src), FALSE);
if (type < 0 || type > GST_RTCP_SDES_PRIV)
return FALSE;
if (data)
*data = src->sdes[type];
if (len)
*len = src->sdes_len[type];
return TRUE;
}
/**
* rtp_source_get_sdes_string:
* @src: an #RTPSource
* @type: the type of the SDES item
*
* Get the SDES item of @type from @src.
*
* Returns: a null-terminated copy of the SDES item or NULL when @type was not
* valid or the SDES item was unset. g_free() after usage.
*/
gchar *
rtp_source_get_sdes_string (RTPSource * src, GstRTCPSDESType type)
{
gchar *result;
g_return_val_if_fail (RTP_IS_SOURCE (src), NULL);
if (type < 0 || type > GST_RTCP_SDES_PRIV)
return NULL;
result = g_strndup ((const gchar *) src->sdes[type], src->sdes_len[type]);
return result;
}
/**
* rtp_source_set_rtp_from:
* @src: an #RTPSource
* @address: the RTP address to set
*
* Set that @src is receiving RTP packets from @address. This is used for
* collistion checking.
*/
void
rtp_source_set_rtp_from (RTPSource * src, GstNetAddress * address)
{
g_return_if_fail (RTP_IS_SOURCE (src));
src->have_rtp_from = TRUE;
memcpy (&src->rtp_from, address, sizeof (GstNetAddress));
}
/**
* rtp_source_set_rtcp_from:
* @src: an #RTPSource
* @address: the RTCP address to set
*
* Set that @src is receiving RTCP packets from @address. This is used for
* collistion checking.
*/
void
rtp_source_set_rtcp_from (RTPSource * src, GstNetAddress * address)
{
g_return_if_fail (RTP_IS_SOURCE (src));
src->have_rtcp_from = TRUE;
memcpy (&src->rtcp_from, address, sizeof (GstNetAddress));
}
static GstFlowReturn
push_packet (RTPSource * src, GstBuffer * buffer)
{
GstFlowReturn ret = GST_FLOW_OK;
/* push queued packets first if any */
while (!g_queue_is_empty (src->packets)) {
GstBuffer *buffer = GST_BUFFER_CAST (g_queue_pop_head (src->packets));
GST_LOG ("pushing queued packet");
if (src->callbacks.push_rtp)
src->callbacks.push_rtp (src, buffer, src->user_data);
else
gst_buffer_unref (buffer);
}
GST_LOG ("pushing new packet");
/* push packet */
if (src->callbacks.push_rtp)
ret = src->callbacks.push_rtp (src, buffer, src->user_data);
else
gst_buffer_unref (buffer);
return ret;
}
static gint
get_clock_rate (RTPSource * src, guint8 payload)
{
if (src->payload == -1) {
/* first payload received, nothing was in the caps, lock on to this payload */
src->payload = payload;
GST_DEBUG ("first payload %d", payload);
} else if (payload != src->payload) {
/* we have a different payload than before, reset the clock-rate */
GST_DEBUG ("new payload %d", payload);
src->payload = payload;
src->clock_rate = -1;
src->stats.transit = -1;
}
if (src->clock_rate == -1) {
gint clock_rate = -1;
if (src->callbacks.clock_rate)
clock_rate = src->callbacks.clock_rate (src, payload, src->user_data);
GST_DEBUG ("got clock-rate %d", clock_rate);
src->clock_rate = clock_rate;
}
return src->clock_rate;
}
/* Jitter is the variation in the delay of received packets in a flow. It is
* measured by comparing the interval when RTP packets were sent to the interval
* at which they were received. For instance, if packet #1 and packet #2 leave
* 50 milliseconds apart and arrive 60 milliseconds apart, then the jitter is 10
* milliseconds. */
static void
calculate_jitter (RTPSource * src, GstBuffer * buffer,
RTPArrivalStats * arrival)
{
guint64 ntpnstime;
guint32 rtparrival, transit, rtptime;
gint32 diff;
gint clock_rate;
guint8 pt;
/* get arrival time */
if ((ntpnstime = arrival->ntpnstime) == GST_CLOCK_TIME_NONE)
goto no_time;
pt = gst_rtp_buffer_get_payload_type (buffer);
GST_LOG ("SSRC %08x got payload %d", src->ssrc, pt);
/* get clockrate */
if ((clock_rate = get_clock_rate (src, pt)) == -1)
goto no_clock_rate;
rtptime = gst_rtp_buffer_get_timestamp (buffer);
/* convert arrival time to RTP timestamp units, truncate to 32 bits, we don't
* care about the absolute value, just the difference. */
rtparrival = gst_util_uint64_scale_int (ntpnstime, clock_rate, GST_SECOND);
/* transit time is difference with RTP timestamp */
transit = rtparrival - rtptime;
/* get ABS diff with previous transit time */
if (src->stats.transit != -1) {
if (transit > src->stats.transit)
diff = transit - src->stats.transit;
else
diff = src->stats.transit - transit;
} else
diff = 0;
src->stats.transit = transit;
/* update jitter, the value we store is scaled up so we can keep precision. */
src->stats.jitter += diff - ((src->stats.jitter + 8) >> 4);
src->stats.prev_rtptime = src->stats.last_rtptime;
src->stats.last_rtptime = rtparrival;
GST_LOG ("rtparrival %u, rtptime %u, clock-rate %d, diff %d, jitter: %f",
rtparrival, rtptime, clock_rate, diff, (src->stats.jitter) / 16.0);
return;
/* ERRORS */
no_time:
{
GST_WARNING ("cannot get current time");
return;
}
no_clock_rate:
{
GST_WARNING ("cannot get clock-rate for pt %d", pt);
return;
}
}
static void
init_seq (RTPSource * src, guint16 seq)
{
src->stats.base_seq = seq;
src->stats.max_seq = seq;
src->stats.bad_seq = RTP_SEQ_MOD + 1; /* so seq == bad_seq is false */
src->stats.cycles = 0;
src->stats.packets_received = 0;
src->stats.octets_received = 0;
src->stats.bytes_received = 0;
src->stats.prev_received = 0;
src->stats.prev_expected = 0;
GST_DEBUG ("base_seq %d", seq);
}
/**
* rtp_source_process_rtp:
* @src: an #RTPSource
* @buffer: an RTP buffer
*
* Let @src handle the incomming RTP @buffer.
*
* Returns: a #GstFlowReturn.
*/
GstFlowReturn
rtp_source_process_rtp (RTPSource * src, GstBuffer * buffer,
RTPArrivalStats * arrival)
{
GstFlowReturn result = GST_FLOW_OK;
guint16 seqnr, udelta;
RTPSourceStats *stats;
g_return_val_if_fail (RTP_IS_SOURCE (src), GST_FLOW_ERROR);
g_return_val_if_fail (GST_IS_BUFFER (buffer), GST_FLOW_ERROR);
stats = &src->stats;
seqnr = gst_rtp_buffer_get_seq (buffer);
rtp_source_update_caps (src, GST_BUFFER_CAPS (buffer));
if (stats->cycles == -1) {
GST_DEBUG ("received first buffer");
/* first time we heard of this source */
init_seq (src, seqnr);
src->stats.max_seq = seqnr - 1;
src->probation = RTP_DEFAULT_PROBATION;
}
udelta = seqnr - stats->max_seq;
/* if we are still on probation, check seqnum */
if (src->probation) {
guint16 expected;
expected = src->stats.max_seq + 1;
/* when in probation, we require consecutive seqnums */
if (seqnr == expected) {
/* expected packet */
GST_DEBUG ("probation: seqnr %d == expected %d", seqnr, expected);
src->probation--;
src->stats.max_seq = seqnr;
if (src->probation == 0) {
GST_DEBUG ("probation done!");
init_seq (src, seqnr);
} else {
GstBuffer *q;
GST_DEBUG ("probation %d: queue buffer", src->probation);
/* when still in probation, keep packets in a list. */
g_queue_push_tail (src->packets, buffer);
/* remove packets from queue if there are too many */
while (g_queue_get_length (src->packets) > RTP_MAX_PROBATION_LEN) {
q = g_queue_pop_head (src->packets);
gst_buffer_unref (q);
}
goto done;
}
} else {
GST_DEBUG ("probation: seqnr %d != expected %d", seqnr, expected);
src->probation = RTP_DEFAULT_PROBATION;
src->stats.max_seq = seqnr;
goto done;
}
} else if (udelta < RTP_MAX_DROPOUT) {
/* in order, with permissible gap */
if (seqnr < stats->max_seq) {
/* sequence number wrapped - count another 64K cycle. */
stats->cycles += RTP_SEQ_MOD;
}
stats->max_seq = seqnr;
} else if (udelta <= RTP_SEQ_MOD - RTP_MAX_MISORDER) {
/* the sequence number made a very large jump */
if (seqnr == stats->bad_seq) {
/* two sequential packets -- assume that the other side
* restarted without telling us so just re-sync
* (i.e., pretend this was the first packet). */
init_seq (src, seqnr);
} else {
/* unacceptable jump */
stats->bad_seq = (seqnr + 1) & (RTP_SEQ_MOD - 1);
goto bad_sequence;
}
} else {
/* duplicate or reordered packet, will be filtered by jitterbuffer. */
GST_WARNING ("duplicate or reordered packet");
}
src->stats.octets_received += arrival->payload_len;
src->stats.bytes_received += arrival->bytes;
src->stats.packets_received++;
/* the source that sent the packet must be a sender */
src->is_sender = TRUE;
src->validated = TRUE;
GST_LOG ("seq %d, PC: %" G_GUINT64_FORMAT ", OC: %" G_GUINT64_FORMAT,
seqnr, src->stats.packets_received, src->stats.octets_received);
/* calculate jitter for the stats */
calculate_jitter (src, buffer, arrival);
/* we're ready to push the RTP packet now */
result = push_packet (src, buffer);
done:
return result;
/* ERRORS */
bad_sequence:
{
GST_WARNING ("unacceptable seqnum received");
return GST_FLOW_OK;
}
}
/**
* rtp_source_process_bye:
* @src: an #RTPSource
* @reason: the reason for leaving
*
* Notify @src that a BYE packet has been received. This will make the source
* inactive.
*/
void
rtp_source_process_bye (RTPSource * src, const gchar * reason)
{
g_return_if_fail (RTP_IS_SOURCE (src));
GST_DEBUG ("marking SSRC %08x as BYE, reason: %s", src->ssrc,
GST_STR_NULL (reason));
/* copy the reason and mark as received_bye */
g_free (src->bye_reason);
src->bye_reason = g_strdup (reason);
src->received_bye = TRUE;
}
static GstBufferListItem
set_ssrc (GstBuffer ** buffer, guint group, guint idx, RTPSource * src)
{
*buffer = gst_buffer_make_writable (*buffer);
gst_rtp_buffer_set_ssrc (*buffer, src->ssrc);
return GST_BUFFER_LIST_SKIP_GROUP;
}
/**
* rtp_source_send_rtp:
* @src: an #RTPSource
* @data: an RTP buffer or a list of RTP buffers
* @is_list: if @data is a buffer or list
* @ntpnstime: the NTP time when this buffer was captured in nanoseconds. This
* is the buffer timestamp converted to NTP time.
*
* Send @data (an RTP buffer or list of buffers) originating from @src.
* This will make @src a sender. This function takes ownership of @data and
* modifies the SSRC in the RTP packet to that of @src when needed.
*
* Returns: a #GstFlowReturn.
*/
GstFlowReturn
rtp_source_send_rtp (RTPSource * src, gpointer data, gboolean is_list,
guint64 ntpnstime)
{
GstFlowReturn result;
guint len;
guint32 rtptime;
guint64 ext_rtptime;
guint64 ntp_diff, rtp_diff;
guint64 elapsed;
GstBufferList *list = NULL;
GstBuffer *buffer = NULL;
guint packets;
guint32 ssrc;
g_return_val_if_fail (RTP_IS_SOURCE (src), GST_FLOW_ERROR);
g_return_val_if_fail (is_list || GST_IS_BUFFER (data), GST_FLOW_ERROR);
if (is_list) {
list = GST_BUFFER_LIST_CAST (data);
/* We can grab the caps from the first group, since all
* groups of a buffer list have same caps. */
buffer = gst_buffer_list_get (list, 0, 0);
if (!buffer)
goto no_buffer;
} else {
buffer = GST_BUFFER_CAST (data);
}
rtp_source_update_caps (src, GST_BUFFER_CAPS (buffer));
/* we are a sender now */
src->is_sender = TRUE;
if (is_list) {
/* Each group makes up a network packet. */
packets = gst_buffer_list_n_groups (list);
len = gst_rtp_buffer_list_get_payload_len (list);
} else {
packets = 1;
len = gst_rtp_buffer_get_payload_len (buffer);
}
/* update stats for the SR */
src->stats.packets_sent += packets;
src->stats.octets_sent += len;
src->bytes_sent += len;
if (src->prev_ntpnstime) {
elapsed = ntpnstime - src->prev_ntpnstime;
if (elapsed > (G_GINT64_CONSTANT (1) << 31)) {
guint64 rate;
rate =
gst_util_uint64_scale (src->bytes_sent, elapsed,
(G_GINT64_CONSTANT (1) << 29));
GST_LOG ("Elapsed %" G_GUINT64_FORMAT ", bytes %" G_GUINT64_FORMAT
", rate %" G_GUINT64_FORMAT, elapsed, src->bytes_sent, rate);
if (src->bitrate == 0)
src->bitrate = rate;
else
src->bitrate = ((src->bitrate * 3) + rate) / 4;
src->prev_ntpnstime = ntpnstime;
src->bytes_sent = 0;
}
} else {
GST_LOG ("Reset bitrate measurement");
src->prev_ntpnstime = ntpnstime;
src->bitrate = 0;
}
if (is_list) {
rtptime = gst_rtp_buffer_list_get_timestamp (list);
} else {
rtptime = gst_rtp_buffer_get_timestamp (buffer);
}
ext_rtptime = src->last_rtptime;
ext_rtptime = gst_rtp_buffer_ext_timestamp (&ext_rtptime, rtptime);
GST_LOG ("SSRC %08x, RTP %" G_GUINT64_FORMAT ", NTP %" GST_TIME_FORMAT,
src->ssrc, ext_rtptime, GST_TIME_ARGS (ntpnstime));
if (ext_rtptime > src->last_rtptime) {
rtp_diff = ext_rtptime - src->last_rtptime;
ntp_diff = ntpnstime - src->last_ntpnstime;
/* calc the diff so we can detect drift at the sender. This can also be used
* to guestimate the clock rate if the NTP time is locked to the RTP
* timestamps (as is the case when the capture device is providing the clock). */
GST_LOG ("SSRC %08x, diff RTP %" G_GUINT64_FORMAT ", diff NTP %"
GST_TIME_FORMAT, src->ssrc, rtp_diff, GST_TIME_ARGS (ntp_diff));
}
/* we keep track of the last received RTP timestamp and the corresponding
* NTP timestamp so that we can use this info when constructing SR reports */
src->last_rtptime = ext_rtptime;
src->last_ntpnstime = ntpnstime;
/* push packet */
if (!src->callbacks.push_rtp)
goto no_callback;
if (is_list) {
ssrc = gst_rtp_buffer_list_get_ssrc (list);
} else {
ssrc = gst_rtp_buffer_get_ssrc (buffer);
}
if (ssrc != src->ssrc) {
/* the SSRC of the packet is not correct, make a writable buffer and
* update the SSRC. This could involve a complete copy of the packet when
* it is not writable. Usually the payloader will use caps negotiation to
* get the correct SSRC from the session manager before pushing anything. */
/* FIXME, we don't want to warn yet because we can't inform any payloader
* of the changes SSRC yet because we don't implement pad-alloc. */
GST_LOG ("updating SSRC from %08x to %08x, fix the payloader", ssrc,
src->ssrc);
if (is_list) {
list = gst_buffer_list_make_writable (list);
gst_buffer_list_foreach (list, (GstBufferListFunc) set_ssrc, src);
} else {
set_ssrc (&buffer, 0, 0, src);
}
}
GST_LOG ("pushing RTP %s %" G_GUINT64_FORMAT, is_list ? "list" : "packet",
src->stats.packets_sent);
result = src->callbacks.push_rtp (src, data, src->user_data);
return result;
/* ERRORS */
no_buffer:
{
GST_WARNING ("no buffers in buffer list");
gst_mini_object_unref (GST_MINI_OBJECT_CAST (data));
return GST_FLOW_OK;
}
no_callback:
{
GST_WARNING ("no callback installed, dropping packet");
gst_mini_object_unref (GST_MINI_OBJECT_CAST (data));
return GST_FLOW_OK;
}
}
/**
* rtp_source_process_sr:
* @src: an #RTPSource
* @time: time of packet arrival
* @ntptime: the NTP time in 32.32 fixed point
* @rtptime: the RTP time
* @packet_count: the packet count
* @octet_count: the octect count
*
* Update the sender report in @src.
*/
void
rtp_source_process_sr (RTPSource * src, GstClockTime time, guint64 ntptime,
guint32 rtptime, guint32 packet_count, guint32 octet_count)
{
RTPSenderReport *curr;
gint curridx;
g_return_if_fail (RTP_IS_SOURCE (src));
GST_DEBUG ("got SR packet: SSRC %08x, NTP %08x:%08x, RTP %" G_GUINT32_FORMAT
", PC %" G_GUINT32_FORMAT ", OC %" G_GUINT32_FORMAT, src->ssrc,
(guint32) (ntptime >> 32), (guint32) (ntptime & 0xffffffff), rtptime,
packet_count, octet_count);
curridx = src->stats.curr_sr ^ 1;
curr = &src->stats.sr[curridx];
/* this is a sender now */
src->is_sender = TRUE;
/* update current */
curr->is_valid = TRUE;
curr->ntptime = ntptime;
curr->rtptime = rtptime;
curr->packet_count = packet_count;
curr->octet_count = octet_count;
curr->time = time;
/* make current */
src->stats.curr_sr = curridx;
}
/**
* rtp_source_process_rb:
* @src: an #RTPSource
* @time: the current time in nanoseconds since 1970
* @fractionlost: fraction lost since last SR/RR
* @packetslost: the cumululative number of packets lost
* @exthighestseq: the extended last sequence number received
* @jitter: the interarrival jitter
* @lsr: the last SR packet from this source
* @dlsr: the delay since last SR packet
*
* Update the report block in @src.
*/
void
rtp_source_process_rb (RTPSource * src, GstClockTime time, guint8 fractionlost,
gint32 packetslost, guint32 exthighestseq, guint32 jitter, guint32 lsr,
guint32 dlsr)
{
RTPReceiverReport *curr;
gint curridx;
guint32 ntp, A;
g_return_if_fail (RTP_IS_SOURCE (src));
GST_DEBUG ("got RB packet: SSRC %08x, FL %2x, PL %d, HS %" G_GUINT32_FORMAT
", jitter %" G_GUINT32_FORMAT ", LSR %04x:%04x, DLSR %04x:%04x",
src->ssrc, fractionlost, packetslost, exthighestseq, jitter, lsr >> 16,
lsr & 0xffff, dlsr >> 16, dlsr & 0xffff);
curridx = src->stats.curr_rr ^ 1;
curr = &src->stats.rr[curridx];
/* update current */
curr->is_valid = TRUE;
curr->fractionlost = fractionlost;
curr->packetslost = packetslost;
curr->exthighestseq = exthighestseq;
curr->jitter = jitter;
curr->lsr = lsr;
curr->dlsr = dlsr;
/* calculate round trip, round the time up */
ntp = ((gst_rtcp_unix_to_ntp (time) + 0xffff) >> 16) & 0xffffffff;
A = dlsr + lsr;
if (A > 0 && ntp > A)
A = ntp - A;
else
A = 0;
curr->round_trip = A;
GST_DEBUG ("NTP %04x:%04x, round trip %04x:%04x", ntp >> 16, ntp & 0xffff,
A >> 16, A & 0xffff);
/* make current */
src->stats.curr_rr = curridx;
}
/**
* rtp_source_get_new_sr:
* @src: an #RTPSource
* @ntpnstime: the current time in nanoseconds since 1970
* @ntptime: the NTP time in 32.32 fixed point
* @rtptime: the RTP time corresponding to @ntptime
* @packet_count: the packet count
* @octet_count: the octect count
*
* Get new values to put into a new SR report from this source.
*
* Returns: %TRUE on success.
*/
gboolean
rtp_source_get_new_sr (RTPSource * src, guint64 ntpnstime,
guint64 * ntptime, guint32 * rtptime, guint32 * packet_count,
guint32 * octet_count)
{
guint64 t_rtp;
guint64 t_current_ntp;
GstClockTimeDiff diff;
g_return_val_if_fail (RTP_IS_SOURCE (src), FALSE);
/* use the sync params to interpolate the date->time member to rtptime. We
* use the last sent timestamp and rtptime as reference points. We assume
* that the slope of the rtptime vs timestamp curve is 1, which is certainly
* sufficient for the frequency at which we report SR and the rate we send
* out RTP packets. */
t_rtp = src->last_rtptime;
GST_DEBUG ("last_ntpnstime %" GST_TIME_FORMAT ", last_rtptime %"
G_GUINT64_FORMAT, GST_TIME_ARGS (src->last_ntpnstime), t_rtp);
if (src->clock_rate != -1) {
/* get the diff with the SR time */
diff = GST_CLOCK_DIFF (src->last_ntpnstime, ntpnstime);
/* now translate the diff to RTP time, handle positive and negative cases.
* If there is no diff, we already set rtptime correctly above. */
if (diff > 0) {
GST_DEBUG ("ntpnstime %" GST_TIME_FORMAT ", diff %" GST_TIME_FORMAT,
GST_TIME_ARGS (ntpnstime), GST_TIME_ARGS (diff));
t_rtp += gst_util_uint64_scale_int (diff, src->clock_rate, GST_SECOND);
} else {
diff = -diff;
GST_DEBUG ("ntpnstime %" GST_TIME_FORMAT ", diff -%" GST_TIME_FORMAT,
GST_TIME_ARGS (ntpnstime), GST_TIME_ARGS (diff));
t_rtp -= gst_util_uint64_scale_int (diff, src->clock_rate, GST_SECOND);
}
} else {
GST_WARNING ("no clock-rate, cannot interpolate rtp time");
}
/* convert the NTP time in nanoseconds to 32.32 fixed point */
t_current_ntp = gst_util_uint64_scale (ntpnstime, (1LL << 32), GST_SECOND);
GST_DEBUG ("NTP %08x:%08x, RTP %" G_GUINT32_FORMAT,
(guint32) (t_current_ntp >> 32), (guint32) (t_current_ntp & 0xffffffff),
(guint32) t_rtp);
if (ntptime)
*ntptime = t_current_ntp;
if (rtptime)
*rtptime = t_rtp;
if (packet_count)
*packet_count = src->stats.packets_sent;
if (octet_count)
*octet_count = src->stats.octets_sent;
return TRUE;
}
/**
* rtp_source_get_new_rb:
* @src: an #RTPSource
* @time: the current time of the system clock
* @fractionlost: fraction lost since last SR/RR
* @packetslost: the cumululative number of packets lost
* @exthighestseq: the extended last sequence number received
* @jitter: the interarrival jitter
* @lsr: the last SR packet from this source
* @dlsr: the delay since last SR packet
*
* Get new values to put into a new report block from this source.
*
* Returns: %TRUE on success.
*/
gboolean
rtp_source_get_new_rb (RTPSource * src, GstClockTime time,
guint8 * fractionlost, gint32 * packetslost, guint32 * exthighestseq,
guint32 * jitter, guint32 * lsr, guint32 * dlsr)
{
RTPSourceStats *stats;
guint64 extended_max, expected;
guint64 expected_interval, received_interval, ntptime;
gint64 lost, lost_interval;
guint32 fraction, LSR, DLSR;
GstClockTime sr_time;
stats = &src->stats;
extended_max = stats->cycles + stats->max_seq;
expected = extended_max - stats->base_seq + 1;
GST_DEBUG ("ext_max %" G_GUINT64_FORMAT ", expected %" G_GUINT64_FORMAT
", received %" G_GUINT64_FORMAT ", base_seq %" G_GUINT32_FORMAT,
extended_max, expected, stats->packets_received, stats->base_seq);
lost = expected - stats->packets_received;
lost = CLAMP (lost, -0x800000, 0x7fffff);
expected_interval = expected - stats->prev_expected;
stats->prev_expected = expected;
received_interval = stats->packets_received - stats->prev_received;
stats->prev_received = stats->packets_received;
lost_interval = expected_interval - received_interval;
if (expected_interval == 0 || lost_interval <= 0)
fraction = 0;
else
fraction = (lost_interval << 8) / expected_interval;
GST_DEBUG ("add RR for SSRC %08x", src->ssrc);
/* we scaled the jitter up for additional precision */
GST_DEBUG ("fraction %" G_GUINT32_FORMAT ", lost %" G_GINT64_FORMAT
", extseq %" G_GUINT64_FORMAT ", jitter %d", fraction, lost,
extended_max, stats->jitter >> 4);
if (rtp_source_get_last_sr (src, &sr_time, &ntptime, NULL, NULL, NULL)) {
GstClockTime diff;
/* LSR is middle 32 bits of the last ntptime */
LSR = (ntptime >> 16) & 0xffffffff;
diff = time - sr_time;
GST_DEBUG ("last SR time diff %" GST_TIME_FORMAT, GST_TIME_ARGS (diff));
/* DLSR, delay since last SR is expressed in 1/65536 second units */
DLSR = gst_util_uint64_scale_int (diff, 65536, GST_SECOND);
} else {
/* No valid SR received, LSR/DLSR are set to 0 then */
GST_DEBUG ("no valid SR received");
LSR = 0;
DLSR = 0;
}
GST_DEBUG ("LSR %04x:%04x, DLSR %04x:%04x", LSR >> 16, LSR & 0xffff,
DLSR >> 16, DLSR & 0xffff);
if (fractionlost)
*fractionlost = fraction;
if (packetslost)
*packetslost = lost;
if (exthighestseq)
*exthighestseq = extended_max;
if (jitter)
*jitter = stats->jitter >> 4;
if (lsr)
*lsr = LSR;
if (dlsr)
*dlsr = DLSR;
return TRUE;
}
/**
* rtp_source_get_last_sr:
* @src: an #RTPSource
* @time: time of packet arrival
* @ntptime: the NTP time in 32.32 fixed point
* @rtptime: the RTP time
* @packet_count: the packet count
* @octet_count: the octect count
*
* Get the values of the last sender report as set with rtp_source_process_sr().
*
* Returns: %TRUE if there was a valid SR report.
*/
gboolean
rtp_source_get_last_sr (RTPSource * src, GstClockTime * time, guint64 * ntptime,
guint32 * rtptime, guint32 * packet_count, guint32 * octet_count)
{
RTPSenderReport *curr;
g_return_val_if_fail (RTP_IS_SOURCE (src), FALSE);
curr = &src->stats.sr[src->stats.curr_sr];
if (!curr->is_valid)
return FALSE;
if (ntptime)
*ntptime = curr->ntptime;
if (rtptime)
*rtptime = curr->rtptime;
if (packet_count)
*packet_count = curr->packet_count;
if (octet_count)
*octet_count = curr->octet_count;
if (time)
*time = curr->time;
return TRUE;
}
/**
* rtp_source_get_last_rb:
* @src: an #RTPSource
* @fractionlost: fraction lost since last SR/RR
* @packetslost: the cumululative number of packets lost
* @exthighestseq: the extended last sequence number received
* @jitter: the interarrival jitter
* @lsr: the last SR packet from this source
* @dlsr: the delay since last SR packet
* @round_trip: the round trip time
*
* Get the values of the last RB report set with rtp_source_process_rb().
*
* Returns: %TRUE if there was a valid SB report.
*/
gboolean
rtp_source_get_last_rb (RTPSource * src, guint8 * fractionlost,
gint32 * packetslost, guint32 * exthighestseq, guint32 * jitter,
guint32 * lsr, guint32 * dlsr, guint32 * round_trip)
{
RTPReceiverReport *curr;
g_return_val_if_fail (RTP_IS_SOURCE (src), FALSE);
curr = &src->stats.rr[src->stats.curr_rr];
if (!curr->is_valid)
return FALSE;
if (fractionlost)
*fractionlost = curr->fractionlost;
if (packetslost)
*packetslost = curr->packetslost;
if (exthighestseq)
*exthighestseq = curr->exthighestseq;
if (jitter)
*jitter = curr->jitter;
if (lsr)
*lsr = curr->lsr;
if (dlsr)
*dlsr = curr->dlsr;
if (round_trip)
*round_trip = curr->round_trip;
return TRUE;
}