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[MOVED FROM GST-P-FARSIGHT] The first implementation of RTP muxer

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zeeshan.ali@nokia.com 2007-03-07 08:53:07 +00:00 committed by Edward Hervey
parent a6d1d53de0
commit fbcfa441dc
3 changed files with 448 additions and 0 deletions
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0
gst/rtpmux/.git-darcs-dir Normal file
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gst/rtpmux/Makefile.am Normal file
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plugin_LTLIBRARIES = libgstrtpmux.la
libgstrtpmux_la_SOURCES = gstrtpmux.c
libgstrtpmux_la_CFLAGS = $(GST_CFLAGS) $(GST_PLUGINS_BASE_CFLAGS) $(ERROR_CFLAGS) -DEXTERN_BUF -DRTP_SUPPORT
libgstrtpmux_la_LIBADD = $(GST_LIBS_LIBS)
libgstrtpmux_la_LDFLAGS = $(GST_PLUGIN_LDFLAGS) $(GST_BASE_LIBS) $(GST_PLUGINS_BASE_LIBS) -lgstrtp-@GST_MAJORMINOR@

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gst/rtpmux/gstrtpmux.c Normal file
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/* rtp muxer plugin for GStreamer
* Copyright (C) 2004 Wim Taymans <wim@fluendo.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-rtpmux
* @short_description: Muxer that takes one or several RTP streams
* and muxes them to a single rtp stream.
*
* <refsect2>
* </refsect2>
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <gst/gst.h>
#include <gst/rtp/gstrtpbuffer.h>
#include <string.h>
GST_DEBUG_CATEGORY_STATIC (gst_rtp_mux_debug);
#define GST_CAT_DEFAULT gst_rtp_mux_debug
#define GST_TYPE_RTP_MUX (gst_rtp_mux_get_type())
#define GST_RTP_MUX(obj) (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_RTP_MUX, GstRTPMux))
#define GST_RTP_MUX_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_RTP_MUX, GstRTPMux))
#define GST_IS_RTP_MUX(obj) (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_RTP_MUX))
#define GST_IS_RTP_MUX_CLASS(obj) (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_RTP_MUX))
typedef struct _GstRTPMux GstRTPMux;
typedef struct _GstRTPMuxClass GstRTPMuxClass;
/**
* GstRTPMux:
*
* The opaque #GstRTPMux structure.
*/
struct _GstRTPMux
{
GstElement element;
/* pad */
GstPad *srcpad;
/* sinkpads */
GSList *sinkpads;
gint numpads;
guint16 seqnum_base;
gint16 seqnum_offset;
guint16 seqnum;
};
struct _GstRTPMuxClass
{
GstElementClass parent_class;
};
/* elementfactory information */
static const GstElementDetails gst_rtp_mux_details =
GST_ELEMENT_DETAILS ("RTP muxer",
"Codec/Muxer",
"mux rtp streams",
"Zeeshan Ali <first.last@nokia.com>");
enum
{
ARG_0,
PROP_SEQNUM_OFFSET,
PROP_SEQNUM
/* FILL ME */
};
#define DEFAULT_SEQNUM_OFFSET -1
static GstStaticPadTemplate src_factory = GST_STATIC_PAD_TEMPLATE ("src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_STATIC_CAPS ("application/x-rtp")
);
static GstStaticPadTemplate sink_factory = GST_STATIC_PAD_TEMPLATE ("sink_%d",
GST_PAD_SINK,
GST_PAD_REQUEST,
GST_STATIC_CAPS ("application/x-rtp")
);
static void gst_rtp_mux_base_init (gpointer g_class);
static void gst_rtp_mux_class_init (GstRTPMuxClass * klass);
static void gst_rtp_mux_init (GstRTPMux * rtp_mux);
static void gst_rtp_mux_finalize (GObject * object);
static gboolean gst_rtp_mux_handle_src_event (GstPad * pad,
GstEvent * event);
static GstPad *gst_rtp_mux_request_new_pad (GstElement * element,
GstPadTemplate * templ, const gchar * name);
static GstFlowReturn gst_rtp_mux_chain (GstPad * pad,
GstBuffer * buffer);
static gboolean gst_rtp_mux_setcaps (GstPad *pad, GstCaps *caps);
static GstStateChangeReturn gst_rtp_mux_change_state (GstElement *
element, GstStateChange transition);
static void gst_rtp_mux_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec);
static void gst_rtp_mux_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec);
static GstElementClass *parent_class = NULL;
GType
gst_rtp_mux_get_type (void)
{
static GType rtp_mux_type = 0;
if (!rtp_mux_type) {
static const GTypeInfo rtp_mux_info = {
sizeof (GstRTPMuxClass),
gst_rtp_mux_base_init,
NULL,
(GClassInitFunc) gst_rtp_mux_class_init,
NULL,
NULL,
sizeof (GstRTPMux),
0,
(GInstanceInitFunc) gst_rtp_mux_init,
};
rtp_mux_type =
g_type_register_static (GST_TYPE_ELEMENT, "GstRTPMux",
&rtp_mux_info, 0);
}
return rtp_mux_type;
}
static void
gst_rtp_mux_base_init (gpointer g_class)
{
GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&src_factory));
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&sink_factory));
gst_element_class_set_details (element_class, &gst_rtp_mux_details);
}
static void
gst_rtp_mux_class_init (GstRTPMuxClass * klass)
{
GObjectClass *gobject_class;
GstElementClass *gstelement_class;
gobject_class = (GObjectClass *) klass;
gstelement_class = (GstElementClass *) klass;
parent_class = g_type_class_peek_parent (klass);
gobject_class->finalize = gst_rtp_mux_finalize;
gobject_class->get_property = gst_rtp_mux_get_property;
gobject_class->set_property = gst_rtp_mux_set_property;
g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_SEQNUM_OFFSET,
g_param_spec_int ("seqnum-offset", "Sequence number Offset",
"Offset to add to all outgoing seqnum (-1 = random)", -1, G_MAXINT,
DEFAULT_SEQNUM_OFFSET, G_PARAM_READWRITE));
g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_SEQNUM,
g_param_spec_uint ("seqnum", "Sequence number",
"The RTP sequence number of the last processed packet",
0, G_MAXUINT, 0, G_PARAM_READABLE));
gstelement_class->request_new_pad = gst_rtp_mux_request_new_pad;
gstelement_class->change_state = gst_rtp_mux_change_state;
}
static void
gst_rtp_mux_init (GstRTPMux * rtp_mux)
{
GstElementClass *klass = GST_ELEMENT_GET_CLASS (rtp_mux);
rtp_mux->srcpad =
gst_pad_new_from_template (gst_element_class_get_pad_template (klass,
"src"), "src");
gst_pad_set_event_function (rtp_mux->srcpad,
gst_rtp_mux_handle_src_event);
gst_element_add_pad (GST_ELEMENT (rtp_mux), rtp_mux->srcpad);
rtp_mux->seqnum_offset = DEFAULT_SEQNUM_OFFSET;
}
static void
gst_rtp_mux_finalize (GObject * object)
{
GstRTPMux *rtp_mux;
rtp_mux = GST_RTP_MUX (object);
if (rtp_mux->sinkpads) {
g_slist_foreach (rtp_mux->sinkpads, (GFunc) gst_object_unref, NULL);
g_slist_free (rtp_mux->sinkpads);
rtp_mux->sinkpads = NULL;
}
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static GstPad *
gst_rtp_mux_request_new_pad (GstElement * element,
GstPadTemplate * templ, const gchar * req_name)
{
GstRTPMux *rtp_mux;
GstPad *newpad;
GstElementClass *klass = GST_ELEMENT_GET_CLASS (element);
g_return_val_if_fail (templ != NULL, NULL);
if (templ->direction != GST_PAD_SINK) {
g_warning ("rtp_mux: request pad that is not a SINK pad\n");
return NULL;
}
g_return_val_if_fail (GST_IS_RTP_MUX (element), NULL);
rtp_mux = GST_RTP_MUX (element);
if (templ == gst_element_class_get_pad_template (klass, "sink_%d")) {
gchar *name;
/* create new pad with the name */
name = g_strdup_printf ("sink_%02d", rtp_mux->numpads);
newpad = gst_pad_new_from_template (templ, name);
g_free (name);
rtp_mux->sinkpads = g_slist_append (rtp_mux->sinkpads, (gpointer) newpad);
rtp_mux->numpads++;
} else {
g_warning ("rtp_mux: this is not our template!\n");
return NULL;
}
/* setup some pad functions */
gst_pad_set_chain_function (newpad, gst_rtp_mux_chain);
gst_pad_set_setcaps_function (newpad, gst_rtp_mux_setcaps);
/* dd the pad to the element */
gst_element_add_pad (element, newpad);
return newpad;
}
static GstFlowReturn
gst_rtp_mux_chain (GstPad * pad, GstBuffer * buffer)
{
GstRTPMux *rtp_mux;
rtp_mux = GST_RTP_MUX (gst_pad_get_parent (pad));
rtp_mux->seqnum++;
GST_LOG_OBJECT (rtp_mux, "setting RTP seqnum %d", rtp_mux->seqnum);
gst_rtp_buffer_set_seq (buffer, rtp_mux->seqnum);
gst_object_unref (rtp_mux);
GST_DEBUG_OBJECT (rtp_mux, "Pushing packet size %d, seq=%d, ts=%u",
GST_BUFFER_SIZE (buffer), rtp_mux->seqnum - 1);
return gst_pad_push (rtp_mux->srcpad, buffer);
}
static gboolean
gst_rtp_mux_setcaps (GstPad *pad, GstCaps *caps)
{
/*GstRTPMux *rtp_mux;
GstCaps *old_caps;
GstCaps *new_caps;
gint i;
gboolean ret;
rtp_mux = GST_RTP_MUX (gst_pad_get_parent (pad));
new_caps = gst_caps_copy (caps);
/ * We want our own seq base on the caps * /
for (i=0; i< gst_caps_get_size (new_caps); i++) {
GstStructure *structure = gst_caps_get_structure (new_caps, i);
gst_structure_set (structure,
"seqnum-base", G_TYPE_UINT, rtp_mux->seqnum_base, NULL);
}
old_caps = GST_PAD_CAPS (rtp_mux->srcpad);
if (old_caps != NULL) {
new_caps = gst_caps_union (old_caps, new_caps);
}
GST_DEBUG_OBJECT (rtp_mux,
"seting caps %" GST_PTR_FORMAT " on src pad..", caps);
ret = gst_pad_set_caps (rtp_mux->srcpad, new_caps);
gst_caps_unref (new_caps);
return ret;*/
return TRUE;
}
/* handle events */
static gboolean
gst_rtp_mux_handle_src_event (GstPad * pad, GstEvent * event)
{
GstRTPMux *rtp_mux;
GstEventType type;
rtp_mux = GST_RTP_MUX (gst_pad_get_parent (pad));
type = event ? GST_EVENT_TYPE (event) : GST_EVENT_UNKNOWN;
switch (type) {
case GST_EVENT_SEEK:
/* disable seeking for now */
return FALSE;
default:
break;
}
gst_object_unref (rtp_mux);
return gst_pad_event_default (pad, event);
}
static void
gst_rtp_mux_get_property (GObject * object,
guint prop_id, GValue * value, GParamSpec * pspec)
{
GstRTPMux *rtp_mux;
rtp_mux = GST_RTP_MUX (object);
switch (prop_id) {
case PROP_SEQNUM_OFFSET:
g_value_set_int (value, rtp_mux->seqnum_offset);
break;
case PROP_SEQNUM:
g_value_set_uint (value, rtp_mux->seqnum);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_rtp_mux_set_property (GObject * object,
guint prop_id, const GValue * value, GParamSpec * pspec)
{
GstRTPMux *rtp_mux;
rtp_mux = GST_RTP_MUX (object);
switch (prop_id) {
case PROP_SEQNUM_OFFSET:
rtp_mux->seqnum_offset = g_value_get_int (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static GstStateChangeReturn
gst_rtp_mux_change_state (GstElement * element, GstStateChange transition)
{
GstRTPMux *rtp_mux;
GstStateChangeReturn ret;
rtp_mux = GST_RTP_MUX (element);
switch (transition) {
case GST_STATE_CHANGE_NULL_TO_READY:
break;
case GST_STATE_CHANGE_READY_TO_PAUSED:
if (rtp_mux->seqnum_offset == -1)
rtp_mux->seqnum_base = g_random_int_range (0, G_MAXUINT16);
else
rtp_mux->seqnum_base = rtp_mux->seqnum_offset;
rtp_mux->seqnum = rtp_mux->seqnum_base;
break;
case GST_STATE_CHANGE_PAUSED_TO_READY:
break;
default:
break;
}
ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
if (ret == GST_STATE_CHANGE_FAILURE)
return ret;
switch (transition) {
default:
break;
}
return ret;
}
gboolean
gst_rtp_mux_plugin_init (GstPlugin * plugin)
{
GST_DEBUG_CATEGORY_INIT (gst_rtp_mux_debug, "rtpmux", 0,
"rtp muxer");
return gst_element_register (plugin, "rtpmux", GST_RANK_NONE,
GST_TYPE_RTP_MUX);
}
GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
GST_VERSION_MINOR,
"rtpmux",
"RTP muxer",
gst_rtp_mux_plugin_init,
VERSION,
"LGPL",
"Farsight",
"http://farsight.sf.net")