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gstreamer/gst/realmedia/rdtmanager.c
Thibault Saunier 2df9f6e5ce docs: Port all docstring to gtk-doc markdown
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/* GStreamer
* Copyright (C) <2005,2006> Wim Taymans <wim@fluendo.com>
* <2013> 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., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
/*
* Unless otherwise indicated, Source Code is licensed under MIT license.
* See further explanation attached in License Statement (distributed in the file
* LICENSE).
*
* Permission is hereby granted, free of charge, to any person obtaining a copy of
* this software and associated documentation files (the "Software"), to deal in
* the Software without restriction, including without limitation the rights to
* use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
* of the Software, and to permit persons to whom the Software is furnished to do
* so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
/* Element-Checklist-Version: 5 */
/**
* SECTION:element-rdtmanager
* @title: rdtmanager
* @see_also: GstRtspSrc
*
* A simple RTP session manager used internally by rtspsrc.
*/
/* #define HAVE_RTCP */
#include "gstrdtbuffer.h"
#include "rdtmanager.h"
#include "rdtjitterbuffer.h"
#include <gst/glib-compat-private.h>
#include <stdio.h>
GST_DEBUG_CATEGORY_STATIC (rdtmanager_debug);
#define GST_CAT_DEFAULT (rdtmanager_debug)
/* GstRDTManager signals and args */
enum
{
SIGNAL_REQUEST_PT_MAP,
SIGNAL_CLEAR_PT_MAP,
SIGNAL_ON_NEW_SSRC,
SIGNAL_ON_SSRC_COLLISION,
SIGNAL_ON_SSRC_VALIDATED,
SIGNAL_ON_SSRC_ACTIVE,
SIGNAL_ON_SSRC_SDES,
SIGNAL_ON_BYE_SSRC,
SIGNAL_ON_BYE_TIMEOUT,
SIGNAL_ON_TIMEOUT,
SIGNAL_ON_NPT_STOP,
LAST_SIGNAL
};
#define DEFAULT_LATENCY_MS 200
enum
{
PROP_0,
PROP_LATENCY
};
static GstStaticPadTemplate gst_rdt_manager_recv_rtp_sink_template =
GST_STATIC_PAD_TEMPLATE ("recv_rtp_sink_%u",
GST_PAD_SINK,
GST_PAD_REQUEST,
GST_STATIC_CAPS ("application/x-rdt")
);
static GstStaticPadTemplate gst_rdt_manager_recv_rtcp_sink_template =
GST_STATIC_PAD_TEMPLATE ("recv_rtcp_sink_%u",
GST_PAD_SINK,
GST_PAD_REQUEST,
GST_STATIC_CAPS ("application/x-rtcp")
);
static GstStaticPadTemplate gst_rdt_manager_recv_rtp_src_template =
GST_STATIC_PAD_TEMPLATE ("recv_rtp_src_%u_%u_%u",
GST_PAD_SRC,
GST_PAD_SOMETIMES,
GST_STATIC_CAPS ("application/x-rdt")
);
static GstStaticPadTemplate gst_rdt_manager_rtcp_src_template =
GST_STATIC_PAD_TEMPLATE ("rtcp_src_%u",
GST_PAD_SRC,
GST_PAD_REQUEST,
GST_STATIC_CAPS ("application/x-rtcp")
);
static void gst_rdt_manager_finalize (GObject * object);
static void gst_rdt_manager_set_property (GObject * object,
guint prop_id, const GValue * value, GParamSpec * pspec);
static void gst_rdt_manager_get_property (GObject * object,
guint prop_id, GValue * value, GParamSpec * pspec);
static gboolean gst_rdt_manager_query_src (GstPad * pad, GstObject * parent,
GstQuery * query);
static gboolean gst_rdt_manager_src_activate_mode (GstPad * pad,
GstObject * parent, GstPadMode mode, gboolean active);
static GstClock *gst_rdt_manager_provide_clock (GstElement * element);
static GstStateChangeReturn gst_rdt_manager_change_state (GstElement * element,
GstStateChange transition);
static GstPad *gst_rdt_manager_request_new_pad (GstElement * element,
GstPadTemplate * templ, const gchar * name, const GstCaps * caps);
static void gst_rdt_manager_release_pad (GstElement * element, GstPad * pad);
static gboolean gst_rdt_manager_parse_caps (GstRDTManager * rdtmanager,
GstRDTManagerSession * session, GstCaps * caps);
static gboolean gst_rdt_manager_event_rdt (GstPad * pad, GstObject * parent,
GstEvent * event);
static GstFlowReturn gst_rdt_manager_chain_rdt (GstPad * pad,
GstObject * parent, GstBuffer * buffer);
static GstFlowReturn gst_rdt_manager_chain_rtcp (GstPad * pad,
GstObject * parent, GstBuffer * buffer);
static void gst_rdt_manager_loop (GstPad * pad);
static guint gst_rdt_manager_signals[LAST_SIGNAL] = { 0 };
#define JBUF_LOCK(sess) (g_mutex_lock (&(sess)->jbuf_lock))
#define JBUF_LOCK_CHECK(sess,label) G_STMT_START { \
JBUF_LOCK (sess); \
if (sess->srcresult != GST_FLOW_OK) \
goto label; \
} G_STMT_END
#define JBUF_UNLOCK(sess) (g_mutex_unlock (&(sess)->jbuf_lock))
#define JBUF_WAIT(sess) (g_cond_wait (&(sess)->jbuf_cond, &(sess)->jbuf_lock))
#define JBUF_WAIT_CHECK(sess,label) G_STMT_START { \
JBUF_WAIT(sess); \
if (sess->srcresult != GST_FLOW_OK) \
goto label; \
} G_STMT_END
#define JBUF_SIGNAL(sess) (g_cond_signal (&(sess)->jbuf_cond))
/* Manages the receiving end of the packets.
*
* There is one such structure for each RTP session (audio/video/...).
* We get the RTP/RTCP packets and stuff them into the session manager.
*/
struct _GstRDTManagerSession
{
/* session id */
gint id;
/* the parent bin */
GstRDTManager *dec;
gboolean active;
/* we only support one ssrc and one pt */
guint32 ssrc;
guint8 pt;
gint clock_rate;
GstCaps *caps;
gint64 clock_base;
GstSegment segment;
/* the last seqnum we pushed out */
guint32 last_popped_seqnum;
/* the next expected seqnum */
guint32 next_seqnum;
/* last output time */
GstClockTime last_out_time;
/* the pads of the session */
GstPad *recv_rtp_sink;
GstPad *recv_rtp_src;
GstPad *recv_rtcp_sink;
GstPad *rtcp_src;
GstFlowReturn srcresult;
gboolean blocked;
gboolean eos;
gboolean waiting;
gboolean discont;
GstClockID clock_id;
/* jitterbuffer, lock and cond */
RDTJitterBuffer *jbuf;
GMutex jbuf_lock;
GCond jbuf_cond;
/* some accounting */
guint64 num_late;
guint64 num_duplicates;
};
/* find a session with the given id */
static GstRDTManagerSession *
find_session_by_id (GstRDTManager * rdtmanager, gint id)
{
GSList *walk;
for (walk = rdtmanager->sessions; walk; walk = g_slist_next (walk)) {
GstRDTManagerSession *sess = (GstRDTManagerSession *) walk->data;
if (sess->id == id)
return sess;
}
return NULL;
}
/* create a session with the given id */
static GstRDTManagerSession *
create_session (GstRDTManager * rdtmanager, gint id)
{
GstRDTManagerSession *sess;
sess = g_new0 (GstRDTManagerSession, 1);
sess->id = id;
sess->dec = rdtmanager;
sess->jbuf = rdt_jitter_buffer_new ();
g_mutex_init (&sess->jbuf_lock);
g_cond_init (&sess->jbuf_cond);
rdtmanager->sessions = g_slist_prepend (rdtmanager->sessions, sess);
return sess;
}
static gboolean
forward_sticky_events (GstPad * pad, GstEvent ** event, gpointer user_data)
{
GstPad *srcpad = GST_PAD_CAST (user_data);
gst_pad_push_event (srcpad, gst_event_ref (*event));
return TRUE;
}
static gboolean
activate_session (GstRDTManager * rdtmanager, GstRDTManagerSession * session,
guint32 ssrc, guint8 pt)
{
GstPadTemplate *templ;
GstElementClass *klass;
gchar *name;
GstCaps *caps;
GValue ret = { 0 };
GValue args[3] = { {0}
, {0}
, {0}
};
GST_DEBUG_OBJECT (rdtmanager, "creating stream");
session->ssrc = ssrc;
session->pt = pt;
/* get pt map */
g_value_init (&args[0], GST_TYPE_ELEMENT);
g_value_set_object (&args[0], rdtmanager);
g_value_init (&args[1], G_TYPE_UINT);
g_value_set_uint (&args[1], session->id);
g_value_init (&args[2], G_TYPE_UINT);
g_value_set_uint (&args[2], pt);
g_value_init (&ret, GST_TYPE_CAPS);
g_value_set_boxed (&ret, NULL);
g_signal_emitv (args, gst_rdt_manager_signals[SIGNAL_REQUEST_PT_MAP], 0,
&ret);
g_value_unset (&args[0]);
g_value_unset (&args[1]);
g_value_unset (&args[2]);
caps = (GstCaps *) g_value_dup_boxed (&ret);
g_value_unset (&ret);
if (caps)
gst_rdt_manager_parse_caps (rdtmanager, session, caps);
name = g_strdup_printf ("recv_rtp_src_%u_%u_%u", session->id, ssrc, pt);
klass = GST_ELEMENT_GET_CLASS (rdtmanager);
templ = gst_element_class_get_pad_template (klass, "recv_rtp_src_%u_%u_%u");
session->recv_rtp_src = gst_pad_new_from_template (templ, name);
g_free (name);
gst_pad_set_element_private (session->recv_rtp_src, session);
gst_pad_set_query_function (session->recv_rtp_src, gst_rdt_manager_query_src);
gst_pad_set_activatemode_function (session->recv_rtp_src,
gst_rdt_manager_src_activate_mode);
gst_pad_set_active (session->recv_rtp_src, TRUE);
gst_pad_sticky_events_foreach (session->recv_rtp_sink, forward_sticky_events,
session->recv_rtp_src);
gst_pad_set_caps (session->recv_rtp_src, caps);
gst_caps_unref (caps);
gst_element_add_pad (GST_ELEMENT_CAST (rdtmanager), session->recv_rtp_src);
return TRUE;
}
static void
free_session (GstRDTManagerSession * session)
{
g_object_unref (session->jbuf);
g_cond_clear (&session->jbuf_cond);
g_mutex_clear (&session->jbuf_lock);
g_free (session);
}
#define gst_rdt_manager_parent_class parent_class
G_DEFINE_TYPE (GstRDTManager, gst_rdt_manager, GST_TYPE_ELEMENT);
/* BOXED:UINT,UINT */
#define g_marshal_value_peek_uint(v) g_value_get_uint (v)
static void
gst_rdt_manager_marshal_BOXED__UINT_UINT (GClosure * closure,
GValue * return_value,
guint n_param_values,
const GValue * param_values,
gpointer invocation_hint, gpointer marshal_data)
{
typedef gpointer (*GMarshalFunc_BOXED__UINT_UINT) (gpointer data1,
guint arg_1, guint arg_2, gpointer data2);
register GMarshalFunc_BOXED__UINT_UINT callback;
register GCClosure *cc = (GCClosure *) closure;
register gpointer data1, data2;
gpointer v_return;
g_return_if_fail (return_value != NULL);
g_return_if_fail (n_param_values == 3);
if (G_CCLOSURE_SWAP_DATA (closure)) {
data1 = closure->data;
data2 = g_value_peek_pointer (param_values + 0);
} else {
data1 = g_value_peek_pointer (param_values + 0);
data2 = closure->data;
}
callback =
(GMarshalFunc_BOXED__UINT_UINT) (marshal_data ? marshal_data :
cc->callback);
v_return = callback (data1,
g_marshal_value_peek_uint (param_values + 1),
g_marshal_value_peek_uint (param_values + 2), data2);
g_value_take_boxed (return_value, v_return);
}
static void
gst_rdt_manager_marshal_VOID__UINT_UINT (GClosure * closure,
GValue * return_value,
guint n_param_values,
const GValue * param_values,
gpointer invocation_hint, gpointer marshal_data)
{
typedef void (*GMarshalFunc_VOID__UINT_UINT) (gpointer data1,
guint arg_1, guint arg_2, gpointer data2);
register GMarshalFunc_VOID__UINT_UINT callback;
register GCClosure *cc = (GCClosure *) closure;
register gpointer data1, data2;
g_return_if_fail (n_param_values == 3);
if (G_CCLOSURE_SWAP_DATA (closure)) {
data1 = closure->data;
data2 = g_value_peek_pointer (param_values + 0);
} else {
data1 = g_value_peek_pointer (param_values + 0);
data2 = closure->data;
}
callback =
(GMarshalFunc_VOID__UINT_UINT) (marshal_data ? marshal_data :
cc->callback);
callback (data1,
g_marshal_value_peek_uint (param_values + 1),
g_marshal_value_peek_uint (param_values + 2), data2);
}
static void
gst_rdt_manager_class_init (GstRDTManagerClass * g_class)
{
GObjectClass *gobject_class;
GstElementClass *gstelement_class;
GstRDTManagerClass *klass;
klass = (GstRDTManagerClass *) g_class;
gobject_class = (GObjectClass *) klass;
gstelement_class = (GstElementClass *) klass;
gobject_class->finalize = gst_rdt_manager_finalize;
gobject_class->set_property = gst_rdt_manager_set_property;
gobject_class->get_property = gst_rdt_manager_get_property;
g_object_class_install_property (gobject_class, PROP_LATENCY,
g_param_spec_uint ("latency", "Buffer latency in ms",
"Amount of ms to buffer", 0, G_MAXUINT, DEFAULT_LATENCY_MS,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
/**
* GstRDTManager::request-pt-map:
* @rdtmanager: the object which received the signal
* @session: the session
* @pt: the pt
*
* Request the payload type as #GstCaps for @pt in @session.
*/
gst_rdt_manager_signals[SIGNAL_REQUEST_PT_MAP] =
g_signal_new ("request-pt-map", G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_LAST, G_STRUCT_OFFSET (GstRDTManagerClass, request_pt_map),
NULL, NULL, gst_rdt_manager_marshal_BOXED__UINT_UINT, GST_TYPE_CAPS, 2,
G_TYPE_UINT, G_TYPE_UINT);
/**
* GstRDTManager::clear-pt-map:
* @rtpbin: the object which received the signal
*
* Clear all previously cached pt-mapping obtained with
* GstRDTManager::request-pt-map.
*/
gst_rdt_manager_signals[SIGNAL_CLEAR_PT_MAP] =
g_signal_new ("clear-pt-map", G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_LAST, G_STRUCT_OFFSET (GstRDTManagerClass, clear_pt_map),
NULL, NULL, g_cclosure_marshal_VOID__VOID, G_TYPE_NONE, 0, G_TYPE_NONE);
/**
* GstRDTManager::on-bye-ssrc:
* @rtpbin: the object which received the signal
* @session: the session
* @ssrc: the SSRC
*
* Notify of an SSRC that became inactive because of a BYE packet.
*/
gst_rdt_manager_signals[SIGNAL_ON_BYE_SSRC] =
g_signal_new ("on-bye-ssrc", G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_LAST, G_STRUCT_OFFSET (GstRDTManagerClass, on_bye_ssrc),
NULL, NULL, gst_rdt_manager_marshal_VOID__UINT_UINT, G_TYPE_NONE, 2,
G_TYPE_UINT, G_TYPE_UINT);
/**
* GstRDTManager::on-bye-timeout:
* @rtpbin: the object which received the signal
* @session: the session
* @ssrc: the SSRC
*
* Notify of an SSRC that has timed out because of BYE
*/
gst_rdt_manager_signals[SIGNAL_ON_BYE_TIMEOUT] =
g_signal_new ("on-bye-timeout", G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_LAST, G_STRUCT_OFFSET (GstRDTManagerClass, on_bye_timeout),
NULL, NULL, gst_rdt_manager_marshal_VOID__UINT_UINT, G_TYPE_NONE, 2,
G_TYPE_UINT, G_TYPE_UINT);
/**
* GstRDTManager::on-timeout:
* @rtpbin: the object which received the signal
* @session: the session
* @ssrc: the SSRC
*
* Notify of an SSRC that has timed out
*/
gst_rdt_manager_signals[SIGNAL_ON_TIMEOUT] =
g_signal_new ("on-timeout", G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_LAST, G_STRUCT_OFFSET (GstRDTManagerClass, on_timeout),
NULL, NULL, gst_rdt_manager_marshal_VOID__UINT_UINT, G_TYPE_NONE, 2,
G_TYPE_UINT, G_TYPE_UINT);
/**
* GstRDTManager::on-npt-stop:
* @rtpbin: the object which received the signal
* @session: the session
* @ssrc: the SSRC
*
* Notify that SSRC sender has sent data up to the configured NPT stop time.
*/
gst_rdt_manager_signals[SIGNAL_ON_NPT_STOP] =
g_signal_new ("on-npt-stop", G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_LAST, G_STRUCT_OFFSET (GstRDTManagerClass, on_npt_stop),
NULL, NULL, gst_rdt_manager_marshal_VOID__UINT_UINT, G_TYPE_NONE, 2,
G_TYPE_UINT, G_TYPE_UINT);
gstelement_class->provide_clock =
GST_DEBUG_FUNCPTR (gst_rdt_manager_provide_clock);
gstelement_class->change_state =
GST_DEBUG_FUNCPTR (gst_rdt_manager_change_state);
gstelement_class->request_new_pad =
GST_DEBUG_FUNCPTR (gst_rdt_manager_request_new_pad);
gstelement_class->release_pad =
GST_DEBUG_FUNCPTR (gst_rdt_manager_release_pad);
/* sink pads */
gst_element_class_add_static_pad_template (gstelement_class,
&gst_rdt_manager_recv_rtp_sink_template);
gst_element_class_add_static_pad_template (gstelement_class,
&gst_rdt_manager_recv_rtcp_sink_template);
/* src pads */
gst_element_class_add_static_pad_template (gstelement_class,
&gst_rdt_manager_recv_rtp_src_template);
gst_element_class_add_static_pad_template (gstelement_class,
&gst_rdt_manager_rtcp_src_template);
gst_element_class_set_static_metadata (gstelement_class, "RTP Decoder",
"Codec/Parser/Network",
"Accepts raw RTP and RTCP packets and sends them forward",
"Wim Taymans <wim.taymans@gmail.com>");
GST_DEBUG_CATEGORY_INIT (rdtmanager_debug, "rdtmanager", 0, "RTP decoder");
}
static void
gst_rdt_manager_init (GstRDTManager * rdtmanager)
{
rdtmanager->provided_clock = gst_system_clock_obtain ();
rdtmanager->latency = DEFAULT_LATENCY_MS;
GST_OBJECT_FLAG_SET (rdtmanager, GST_ELEMENT_FLAG_PROVIDE_CLOCK);
}
static void
gst_rdt_manager_finalize (GObject * object)
{
GstRDTManager *rdtmanager;
rdtmanager = GST_RDT_MANAGER (object);
g_slist_foreach (rdtmanager->sessions, (GFunc) free_session, NULL);
g_slist_free (rdtmanager->sessions);
g_clear_object (&rdtmanager->provided_clock);
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static gboolean
gst_rdt_manager_query_src (GstPad * pad, GstObject * parent, GstQuery * query)
{
GstRDTManager *rdtmanager;
gboolean res;
rdtmanager = GST_RDT_MANAGER (parent);
switch (GST_QUERY_TYPE (query)) {
case GST_QUERY_LATENCY:
{
GstClockTime latency;
latency = rdtmanager->latency * GST_MSECOND;
/* we pretend to be live with a 3 second latency */
gst_query_set_latency (query, TRUE, latency, -1);
GST_DEBUG_OBJECT (rdtmanager, "reporting %" GST_TIME_FORMAT " of latency",
GST_TIME_ARGS (latency));
res = TRUE;
break;
}
default:
res = gst_pad_query_default (pad, parent, query);
break;
}
return res;
}
static gboolean
gst_rdt_manager_src_activate_mode (GstPad * pad, GstObject * parent,
GstPadMode mode, gboolean active)
{
gboolean result;
GstRDTManager *rdtmanager;
GstRDTManagerSession *session;
session = gst_pad_get_element_private (pad);
rdtmanager = session->dec;
switch (mode) {
case GST_PAD_MODE_PUSH:
if (active) {
/* allow data processing */
JBUF_LOCK (session);
GST_DEBUG_OBJECT (rdtmanager, "Enabling pop on queue");
/* Mark as non flushing */
session->srcresult = GST_FLOW_OK;
gst_segment_init (&session->segment, GST_FORMAT_TIME);
session->last_popped_seqnum = -1;
session->last_out_time = -1;
session->next_seqnum = -1;
session->eos = FALSE;
JBUF_UNLOCK (session);
/* start pushing out buffers */
GST_DEBUG_OBJECT (rdtmanager, "Starting task on srcpad");
result =
gst_pad_start_task (pad, (GstTaskFunction) gst_rdt_manager_loop,
pad, NULL);
} else {
/* make sure all data processing stops ASAP */
JBUF_LOCK (session);
/* mark ourselves as flushing */
session->srcresult = GST_FLOW_FLUSHING;
GST_DEBUG_OBJECT (rdtmanager, "Disabling pop on queue");
/* this unblocks any waiting pops on the src pad task */
JBUF_SIGNAL (session);
/* unlock clock, we just unschedule, the entry will be released by
* the locking streaming thread. */
if (session->clock_id)
gst_clock_id_unschedule (session->clock_id);
JBUF_UNLOCK (session);
/* NOTE this will hardlock if the state change is called from the src pad
* task thread because we will _join() the thread. */
GST_DEBUG_OBJECT (rdtmanager, "Stopping task on srcpad");
result = gst_pad_stop_task (pad);
}
break;
default:
result = FALSE;
break;
}
return result;
}
static GstFlowReturn
gst_rdt_manager_handle_data_packet (GstRDTManagerSession * session,
GstClockTime timestamp, GstRDTPacket * packet)
{
GstRDTManager *rdtmanager;
guint16 seqnum;
gboolean tail;
GstFlowReturn res;
GstBuffer *buffer;
rdtmanager = session->dec;
res = GST_FLOW_OK;
seqnum = 0;
GST_DEBUG_OBJECT (rdtmanager,
"Received packet #%d at time %" GST_TIME_FORMAT, seqnum,
GST_TIME_ARGS (timestamp));
buffer = gst_rdt_packet_to_buffer (packet);
JBUF_LOCK_CHECK (session, out_flushing);
/* insert the packet into the queue now, FIXME, use seqnum */
if (!rdt_jitter_buffer_insert (session->jbuf, buffer, timestamp,
session->clock_rate, &tail))
goto duplicate;
/* signal addition of new buffer when the _loop is waiting. */
if (session->waiting)
JBUF_SIGNAL (session);
finished:
JBUF_UNLOCK (session);
return res;
/* ERRORS */
out_flushing:
{
res = session->srcresult;
GST_DEBUG_OBJECT (rdtmanager, "flushing %s", gst_flow_get_name (res));
gst_buffer_unref (buffer);
goto finished;
}
duplicate:
{
GST_WARNING_OBJECT (rdtmanager, "Duplicate packet #%d detected, dropping",
seqnum);
session->num_duplicates++;
gst_buffer_unref (buffer);
goto finished;
}
}
static gboolean
gst_rdt_manager_parse_caps (GstRDTManager * rdtmanager,
GstRDTManagerSession * session, GstCaps * caps)
{
GstStructure *caps_struct;
guint val;
/* first parse the caps */
caps_struct = gst_caps_get_structure (caps, 0);
GST_DEBUG_OBJECT (rdtmanager, "got caps");
/* we need a clock-rate to convert the rtp timestamps to GStreamer time and to
* measure the amount of data in the buffer */
if (!gst_structure_get_int (caps_struct, "clock-rate", &session->clock_rate))
session->clock_rate = 1000;
if (session->clock_rate <= 0)
goto wrong_rate;
GST_DEBUG_OBJECT (rdtmanager, "got clock-rate %d", session->clock_rate);
/* gah, clock-base is uint. If we don't have a base, we will use the first
* buffer timestamp as the base time. This will screw up sync but it's better
* than nothing. */
if (gst_structure_get_uint (caps_struct, "clock-base", &val))
session->clock_base = val;
else
session->clock_base = -1;
GST_DEBUG_OBJECT (rdtmanager, "got clock-base %" G_GINT64_FORMAT,
session->clock_base);
/* first expected seqnum */
if (gst_structure_get_uint (caps_struct, "seqnum-base", &val))
session->next_seqnum = val;
else
session->next_seqnum = -1;
GST_DEBUG_OBJECT (rdtmanager, "got seqnum-base %d", session->next_seqnum);
return TRUE;
/* ERRORS */
wrong_rate:
{
GST_DEBUG_OBJECT (rdtmanager, "Invalid clock-rate %d", session->clock_rate);
return FALSE;
}
}
static gboolean
gst_rdt_manager_event_rdt (GstPad * pad, GstObject * parent, GstEvent * event)
{
GstRDTManager *rdtmanager;
GstRDTManagerSession *session;
gboolean res;
rdtmanager = GST_RDT_MANAGER (parent);
/* find session */
session = gst_pad_get_element_private (pad);
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_CAPS:
{
GstCaps *caps;
gst_event_parse_caps (event, &caps);
res = gst_rdt_manager_parse_caps (rdtmanager, session, caps);
gst_event_unref (event);
break;
}
default:
res = gst_pad_event_default (pad, parent, event);
break;
}
return res;
}
static GstFlowReturn
gst_rdt_manager_chain_rdt (GstPad * pad, GstObject * parent, GstBuffer * buffer)
{
GstFlowReturn res;
GstRDTManager *rdtmanager;
GstRDTManagerSession *session;
GstClockTime timestamp;
GstRDTPacket packet;
guint32 ssrc;
guint8 pt;
gboolean more;
rdtmanager = GST_RDT_MANAGER (parent);
GST_DEBUG_OBJECT (rdtmanager, "got RDT packet");
ssrc = 0;
pt = 0;
GST_DEBUG_OBJECT (rdtmanager, "SSRC %08x, PT %d", ssrc, pt);
/* find session */
session = gst_pad_get_element_private (pad);
/* see if we have the pad */
if (!session->active) {
activate_session (rdtmanager, session, ssrc, pt);
session->active = TRUE;
}
if (GST_BUFFER_IS_DISCONT (buffer)) {
GST_DEBUG_OBJECT (rdtmanager, "received discont");
session->discont = TRUE;
}
res = GST_FLOW_OK;
/* take the timestamp of the buffer. This is the time when the packet was
* received and is used to calculate jitter and clock skew. We will adjust
* this timestamp with the smoothed value after processing it in the
* jitterbuffer. */
timestamp = GST_BUFFER_TIMESTAMP (buffer);
/* bring to running time */
timestamp = gst_segment_to_running_time (&session->segment, GST_FORMAT_TIME,
timestamp);
more = gst_rdt_buffer_get_first_packet (buffer, &packet);
while (more) {
GstRDTType type;
type = gst_rdt_packet_get_type (&packet);
GST_DEBUG_OBJECT (rdtmanager, "Have packet of type %04x", type);
if (GST_RDT_IS_DATA_TYPE (type)) {
GST_DEBUG_OBJECT (rdtmanager, "We have a data packet");
res = gst_rdt_manager_handle_data_packet (session, timestamp, &packet);
} else {
switch (type) {
default:
GST_DEBUG_OBJECT (rdtmanager, "Ignoring packet");
break;
}
}
if (res != GST_FLOW_OK)
break;
more = gst_rdt_packet_move_to_next (&packet);
}
gst_buffer_unref (buffer);
return res;
}
/* push packets from the queue to the downstream demuxer */
static void
gst_rdt_manager_loop (GstPad * pad)
{
GstRDTManager *rdtmanager;
GstRDTManagerSession *session;
GstBuffer *buffer;
GstFlowReturn result;
rdtmanager = GST_RDT_MANAGER (GST_PAD_PARENT (pad));
session = gst_pad_get_element_private (pad);
JBUF_LOCK_CHECK (session, flushing);
GST_DEBUG_OBJECT (rdtmanager, "Peeking item");
while (TRUE) {
/* always wait if we are blocked */
if (!session->blocked) {
/* if we have a packet, we can exit the loop and grab it */
if (rdt_jitter_buffer_num_packets (session->jbuf) > 0)
break;
/* no packets but we are EOS, do eos logic */
if (session->eos)
goto do_eos;
}
/* underrun, wait for packets or flushing now */
session->waiting = TRUE;
JBUF_WAIT_CHECK (session, flushing);
session->waiting = FALSE;
}
buffer = rdt_jitter_buffer_pop (session->jbuf);
GST_DEBUG_OBJECT (rdtmanager, "Got item %p", buffer);
if (session->discont) {
GST_BUFFER_FLAG_SET (buffer, GST_BUFFER_FLAG_DISCONT);
session->discont = FALSE;
}
JBUF_UNLOCK (session);
result = gst_pad_push (session->recv_rtp_src, buffer);
if (result != GST_FLOW_OK)
goto pause;
return;
/* ERRORS */
flushing:
{
GST_DEBUG_OBJECT (rdtmanager, "we are flushing");
gst_pad_pause_task (session->recv_rtp_src);
JBUF_UNLOCK (session);
return;
}
do_eos:
{
/* store result, we are flushing now */
GST_DEBUG_OBJECT (rdtmanager, "We are EOS, pushing EOS downstream");
session->srcresult = GST_FLOW_EOS;
gst_pad_pause_task (session->recv_rtp_src);
gst_pad_push_event (session->recv_rtp_src, gst_event_new_eos ());
JBUF_UNLOCK (session);
return;
}
pause:
{
GST_DEBUG_OBJECT (rdtmanager, "pausing task, reason %s",
gst_flow_get_name (result));
JBUF_LOCK (session);
/* store result */
session->srcresult = result;
/* we don't post errors or anything because upstream will do that for us
* when we pass the return value upstream. */
gst_pad_pause_task (session->recv_rtp_src);
JBUF_UNLOCK (session);
return;
}
}
static GstFlowReturn
gst_rdt_manager_chain_rtcp (GstPad * pad, GstObject * parent,
GstBuffer * buffer)
{
GstRDTManager *src;
#ifdef HAVE_RTCP
gboolean valid;
GstRTCPPacket packet;
gboolean more;
#endif
src = GST_RDT_MANAGER (parent);
GST_DEBUG_OBJECT (src, "got rtcp packet");
#ifdef HAVE_RTCP
valid = gst_rtcp_buffer_validate (buffer);
if (!valid)
goto bad_packet;
/* position on first packet */
more = gst_rtcp_buffer_get_first_packet (buffer, &packet);
while (more) {
switch (gst_rtcp_packet_get_type (&packet)) {
case GST_RTCP_TYPE_SR:
{
guint32 ssrc, rtptime, packet_count, octet_count;
guint64 ntptime;
guint count, i;
gst_rtcp_packet_sr_get_sender_info (&packet, &ssrc, &ntptime, &rtptime,
&packet_count, &octet_count);
GST_DEBUG_OBJECT (src,
"got SR packet: SSRC %08x, NTP %" G_GUINT64_FORMAT
", RTP %u, PC %u, OC %u", ssrc, ntptime, rtptime, packet_count,
octet_count);
count = gst_rtcp_packet_get_rb_count (&packet);
for (i = 0; i < count; i++) {
guint32 ssrc, exthighestseq, jitter, lsr, dlsr;
guint8 fractionlost;
gint32 packetslost;
gst_rtcp_packet_get_rb (&packet, i, &ssrc, &fractionlost,
&packetslost, &exthighestseq, &jitter, &lsr, &dlsr);
GST_DEBUG_OBJECT (src, "got RB packet %d: SSRC %08x, FL %u"
", PL %u, HS %u, JITTER %u, LSR %u, DLSR %u", ssrc, fractionlost,
packetslost, exthighestseq, jitter, lsr, dlsr);
}
break;
}
case GST_RTCP_TYPE_RR:
{
guint32 ssrc;
guint count, i;
ssrc = gst_rtcp_packet_rr_get_ssrc (&packet);
GST_DEBUG_OBJECT (src, "got RR packet: SSRC %08x", ssrc);
count = gst_rtcp_packet_get_rb_count (&packet);
for (i = 0; i < count; i++) {
guint32 ssrc, exthighestseq, jitter, lsr, dlsr;
guint8 fractionlost;
gint32 packetslost;
gst_rtcp_packet_get_rb (&packet, i, &ssrc, &fractionlost,
&packetslost, &exthighestseq, &jitter, &lsr, &dlsr);
GST_DEBUG_OBJECT (src, "got RB packet %d: SSRC %08x, FL %u"
", PL %u, HS %u, JITTER %u, LSR %u, DLSR %u", ssrc, fractionlost,
packetslost, exthighestseq, jitter, lsr, dlsr);
}
break;
}
case GST_RTCP_TYPE_SDES:
{
guint chunks, i, j;
gboolean more_chunks, more_items;
chunks = gst_rtcp_packet_sdes_get_chunk_count (&packet);
GST_DEBUG_OBJECT (src, "got SDES packet with %d chunks", chunks);
more_chunks = gst_rtcp_packet_sdes_first_chunk (&packet);
i = 0;
while (more_chunks) {
guint32 ssrc;
ssrc = gst_rtcp_packet_sdes_get_ssrc (&packet);
GST_DEBUG_OBJECT (src, "chunk %d, SSRC %08x", i, ssrc);
more_items = gst_rtcp_packet_sdes_first_item (&packet);
j = 0;
while (more_items) {
GstRTCPSDESType type;
guint8 len;
gchar *data;
gst_rtcp_packet_sdes_get_item (&packet, &type, &len, &data);
GST_DEBUG_OBJECT (src, "item %d, type %d, len %d, data %s", j,
type, len, data);
more_items = gst_rtcp_packet_sdes_next_item (&packet);
j++;
}
more_chunks = gst_rtcp_packet_sdes_next_chunk (&packet);
i++;
}
break;
}
case GST_RTCP_TYPE_BYE:
{
guint count, i;
gchar *reason;
reason = gst_rtcp_packet_bye_get_reason (&packet);
GST_DEBUG_OBJECT (src, "got BYE packet (reason: %s)",
GST_STR_NULL (reason));
g_free (reason);
count = gst_rtcp_packet_bye_get_ssrc_count (&packet);
for (i = 0; i < count; i++) {
guint32 ssrc;
ssrc = gst_rtcp_packet_bye_get_nth_ssrc (&packet, i);
GST_DEBUG_OBJECT (src, "SSRC: %08x", ssrc);
}
break;
}
case GST_RTCP_TYPE_APP:
GST_DEBUG_OBJECT (src, "got APP packet");
break;
default:
GST_WARNING_OBJECT (src, "got unknown RTCP packet");
break;
}
more = gst_rtcp_packet_move_to_next (&packet);
}
gst_buffer_unref (buffer);
return GST_FLOW_OK;
bad_packet:
{
GST_WARNING_OBJECT (src, "got invalid RTCP packet");
return GST_FLOW_OK;
}
#else
return GST_FLOW_OK;
#endif
}
static void
gst_rdt_manager_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
GstRDTManager *src;
src = GST_RDT_MANAGER (object);
switch (prop_id) {
case PROP_LATENCY:
src->latency = g_value_get_uint (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_rdt_manager_get_property (GObject * object, guint prop_id, GValue * value,
GParamSpec * pspec)
{
GstRDTManager *src;
src = GST_RDT_MANAGER (object);
switch (prop_id) {
case PROP_LATENCY:
g_value_set_uint (value, src->latency);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static GstClock *
gst_rdt_manager_provide_clock (GstElement * element)
{
GstRDTManager *rdtmanager;
rdtmanager = GST_RDT_MANAGER (element);
return GST_CLOCK_CAST (gst_object_ref (rdtmanager->provided_clock));
}
static GstStateChangeReturn
gst_rdt_manager_change_state (GstElement * element, GstStateChange transition)
{
GstStateChangeReturn ret;
switch (transition) {
default:
break;
}
ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
switch (transition) {
case GST_STATE_CHANGE_READY_TO_PAUSED:
case GST_STATE_CHANGE_PLAYING_TO_PAUSED:
/* we're NO_PREROLL when going to PAUSED */
ret = GST_STATE_CHANGE_NO_PREROLL;
break;
default:
break;
}
return ret;
}
/* Create a pad for receiving RTP for the session in @name
*/
static GstPad *
create_recv_rtp (GstRDTManager * rdtmanager, GstPadTemplate * templ,
const gchar * name)
{
guint sessid;
GstRDTManagerSession *session;
/* first get the session number */
if (name == NULL || sscanf (name, "recv_rtp_sink_%u", &sessid) != 1)
goto no_name;
GST_DEBUG_OBJECT (rdtmanager, "finding session %d", sessid);
/* get or create session */
session = find_session_by_id (rdtmanager, sessid);
if (!session) {
GST_DEBUG_OBJECT (rdtmanager, "creating session %d", sessid);
/* create session now */
session = create_session (rdtmanager, sessid);
if (session == NULL)
goto create_error;
}
/* check if pad was requested */
if (session->recv_rtp_sink != NULL)
goto existed;
GST_DEBUG_OBJECT (rdtmanager, "getting RTP sink pad");
session->recv_rtp_sink = gst_pad_new_from_template (templ, name);
gst_pad_set_element_private (session->recv_rtp_sink, session);
gst_pad_set_event_function (session->recv_rtp_sink,
gst_rdt_manager_event_rdt);
gst_pad_set_chain_function (session->recv_rtp_sink,
gst_rdt_manager_chain_rdt);
gst_pad_set_active (session->recv_rtp_sink, TRUE);
gst_element_add_pad (GST_ELEMENT_CAST (rdtmanager), session->recv_rtp_sink);
return session->recv_rtp_sink;
/* ERRORS */
no_name:
{
g_warning ("rdtmanager: invalid name given");
return NULL;
}
create_error:
{
/* create_session already warned */
return NULL;
}
existed:
{
g_warning ("rdtmanager: recv_rtp pad already requested for session %d",
sessid);
return NULL;
}
}
/* Create a pad for receiving RTCP for the session in @name
*/
static GstPad *
create_recv_rtcp (GstRDTManager * rdtmanager, GstPadTemplate * templ,
const gchar * name)
{
guint sessid;
GstRDTManagerSession *session;
/* first get the session number */
if (name == NULL || sscanf (name, "recv_rtcp_sink_%u", &sessid) != 1)
goto no_name;
GST_DEBUG_OBJECT (rdtmanager, "finding session %d", sessid);
/* get the session, it must exist or we error */
session = find_session_by_id (rdtmanager, sessid);
if (!session)
goto no_session;
/* check if pad was requested */
if (session->recv_rtcp_sink != NULL)
goto existed;
GST_DEBUG_OBJECT (rdtmanager, "getting RTCP sink pad");
session->recv_rtcp_sink = gst_pad_new_from_template (templ, name);
gst_pad_set_element_private (session->recv_rtp_sink, session);
gst_pad_set_chain_function (session->recv_rtcp_sink,
gst_rdt_manager_chain_rtcp);
gst_pad_set_active (session->recv_rtcp_sink, TRUE);
gst_element_add_pad (GST_ELEMENT_CAST (rdtmanager), session->recv_rtcp_sink);
return session->recv_rtcp_sink;
/* ERRORS */
no_name:
{
g_warning ("rdtmanager: invalid name given");
return NULL;
}
no_session:
{
g_warning ("rdtmanager: no session with id %d", sessid);
return NULL;
}
existed:
{
g_warning ("rdtmanager: recv_rtcp pad already requested for session %d",
sessid);
return NULL;
}
}
/* Create a pad for sending RTCP for the session in @name
*/
static GstPad *
create_rtcp (GstRDTManager * rdtmanager, GstPadTemplate * templ,
const gchar * name)
{
guint sessid;
GstRDTManagerSession *session;
/* first get the session number */
if (name == NULL || sscanf (name, "rtcp_src_%u", &sessid) != 1)
goto no_name;
/* get or create session */
session = find_session_by_id (rdtmanager, sessid);
if (!session)
goto no_session;
/* check if pad was requested */
if (session->rtcp_src != NULL)
goto existed;
session->rtcp_src = gst_pad_new_from_template (templ, name);
gst_pad_set_active (session->rtcp_src, TRUE);
gst_element_add_pad (GST_ELEMENT_CAST (rdtmanager), session->rtcp_src);
return session->rtcp_src;
/* ERRORS */
no_name:
{
g_warning ("rdtmanager: invalid name given");
return NULL;
}
no_session:
{
g_warning ("rdtmanager: session with id %d does not exist", sessid);
return NULL;
}
existed:
{
g_warning ("rdtmanager: rtcp_src pad already requested for session %d",
sessid);
return NULL;
}
}
/*
*/
static GstPad *
gst_rdt_manager_request_new_pad (GstElement * element,
GstPadTemplate * templ, const gchar * name, const GstCaps * caps)
{
GstRDTManager *rdtmanager;
GstElementClass *klass;
GstPad *result;
g_return_val_if_fail (templ != NULL, NULL);
g_return_val_if_fail (GST_IS_RDT_MANAGER (element), NULL);
rdtmanager = GST_RDT_MANAGER (element);
klass = GST_ELEMENT_GET_CLASS (element);
/* figure out the template */
if (templ == gst_element_class_get_pad_template (klass, "recv_rtp_sink_%u")) {
result = create_recv_rtp (rdtmanager, templ, name);
} else if (templ == gst_element_class_get_pad_template (klass,
"recv_rtcp_sink_%u")) {
result = create_recv_rtcp (rdtmanager, templ, name);
} else if (templ == gst_element_class_get_pad_template (klass, "rtcp_src_%u")) {
result = create_rtcp (rdtmanager, templ, name);
} else
goto wrong_template;
return result;
/* ERRORS */
wrong_template:
{
g_warning ("rdtmanager: this is not our template");
return NULL;
}
}
static void
gst_rdt_manager_release_pad (GstElement * element, GstPad * pad)
{
}
gboolean
gst_rdt_manager_plugin_init (GstPlugin * plugin)
{
return gst_element_register (plugin, "rdtmanager",
GST_RANK_NONE, GST_TYPE_RDT_MANAGER);
}
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