gstreamer/gst/dccp/gstdccpclientsink.c
2012-01-13 00:11:54 +00:00

336 lines
9.9 KiB
C

/* GStreamer
* Copyright (C) <2007> Leandro Melo de Sales <leandroal@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.
*/
/**
* SECTION:element-dccpclientsink
* @see_also: dccpserversrc, dccpclientsrc, dccpserversink
*
* This element connect to a DCCP server and send data to it.
* <ulink url="http://www.linuxfoundation.org/en/Net:DCCP">DCCP</ulink> (Datagram
* Congestion Control Protocol) is a Transport Layer protocol like
* TCP and UDP.
*
* <refsect2>
* <title>Example pipeline</title>
* <para>
* |[
* gst-launch -v filesrc location=music.mp3 ! mp3parse ! dccpclientsink host=localhost port=9011 ccid=2
* ]| Client
* |[
* gst-launch -v dccpserversrc port=9011 ccid=2 ! decodebin ! alsasink
* ]| Server
*
* This example pipeline will send a MP3 stream to the server using DCCP.
* The server will decode the MP3 and play it.
* Run the server pipeline first than the client pipeline.
* </para>
* </refsect2>
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "gstdccpclientsink.h"
#include "gstdccp.h"
/* signals */
enum
{
SIGNAL_CONNECTED,
LAST_SIGNAL
};
/* properties */
enum
{
PROP_0,
PROP_PORT,
PROP_HOST,
PROP_SOCK_FD,
PROP_CCID,
PROP_CLOSE_FD
};
static gboolean gst_dccp_client_sink_stop (GstBaseSink * bsink);
static gboolean gst_dccp_client_sink_start (GstBaseSink * bsink);
static GstFlowReturn gst_dccp_client_sink_render (GstBaseSink * bsink,
GstBuffer * buf);
static void gst_dccp_client_sink_finalize (GObject * gobject);
GST_DEBUG_CATEGORY_STATIC (dccpclientsink_debug);
static GstStaticPadTemplate sinktemplate = GST_STATIC_PAD_TEMPLATE ("sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_STATIC_CAPS_ANY);
GST_BOILERPLATE (GstDCCPClientSink, gst_dccp_client_sink, GstBaseSink,
GST_TYPE_BASE_SINK);
static guint gst_dccp_client_sink_signals[LAST_SIGNAL] = { 0 };
/*
* Write buffer to client socket.
*
* @return GST_FLOW_OK if the send operation was successful, GST_FLOW_ERROR otherwise.
*/
static GstFlowReturn
gst_dccp_client_sink_render (GstBaseSink * bsink, GstBuffer * buf)
{
GstDCCPClientSink *sink = GST_DCCP_CLIENT_SINK (bsink);
return gst_dccp_send_buffer (GST_ELEMENT (sink), buf, sink->sock_fd,
sink->pksize);
}
/*
* Set the value of a property for the client sink.
*/
static void
gst_dccp_client_sink_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
GstDCCPClientSink *sink = GST_DCCP_CLIENT_SINK (object);
switch (prop_id) {
case PROP_PORT:
sink->port = g_value_get_int (value);
break;
case PROP_SOCK_FD:
sink->sock_fd = g_value_get_int (value);
break;
case PROP_HOST:
if (!g_value_get_string (value)) {
g_warning ("host property cannot be NULL");
break;
}
g_free (sink->host);
sink->host = g_strdup (g_value_get_string (value));
break;
case PROP_CLOSE_FD:
sink->closed = g_value_get_boolean (value);
break;
case PROP_CCID:
sink->ccid = g_value_get_int (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
/*
* Get a given property value for the client sink.
*/
static void
gst_dccp_client_sink_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec)
{
GstDCCPClientSink *sink = GST_DCCP_CLIENT_SINK (object);
switch (prop_id) {
case PROP_PORT:
g_value_set_int (value, sink->port);
break;
case PROP_SOCK_FD:
g_value_set_int (value, sink->sock_fd);
break;
case PROP_HOST:
g_value_set_string (value, sink->host);
break;
case PROP_CLOSE_FD:
g_value_set_boolean (value, sink->closed);
break;
case PROP_CCID:
g_value_set_int (value, sink->ccid);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_dccp_client_sink_finalize (GObject * gobject)
{
GstDCCPClientSink *this = GST_DCCP_CLIENT_SINK (gobject);
g_free (this->host);
G_OBJECT_CLASS (parent_class)->finalize (gobject);
}
/*
* Starts the element. If the sockfd property was not the default, this method
* will create a new socket and connect to the server.
*
* @param bsink - the element
* @return TRUE if the send operation was successful, FALSE otherwise.
*/
static gboolean
gst_dccp_client_sink_start (GstBaseSink * bsink)
{
GstDCCPClientSink *sink = GST_DCCP_CLIENT_SINK (bsink);
if (sink->sock_fd == DCCP_DEFAULT_SOCK_FD) {
gchar *ip = NULL;
/* look up name if we need to */
if (!(ip = gst_dccp_host_to_ip (GST_ELEMENT (sink), sink->host))) {
GST_ERROR_OBJECT (sink, "cannot resolve hostname");
gst_dccp_client_sink_stop (GST_BASE_SINK (sink));
return FALSE;
}
/* name the server socket */
memset (&sink->server_sin, 0, sizeof (sink->server_sin));
sink->server_sin.sin_family = AF_INET; /* network socket */
sink->server_sin.sin_port = htons (sink->port); /* on port */
sink->server_sin.sin_addr.s_addr = inet_addr (ip); /* on host ip */
g_free (ip);
/* create socket */
if ((sink->sock_fd = gst_dccp_create_new_socket (GST_ELEMENT (sink))) < 0) {
return FALSE;
}
if (!gst_dccp_set_ccid (GST_ELEMENT (sink), sink->sock_fd, sink->ccid)) {
gst_dccp_client_sink_stop (GST_BASE_SINK (sink));
return FALSE;
}
if (!gst_dccp_connect_to_server (GST_ELEMENT (sink), sink->server_sin,
sink->sock_fd)) {
gst_dccp_client_sink_stop (GST_BASE_SINK (sink));
return FALSE;
}
/* the socket is connected */
g_signal_emit (sink, gst_dccp_client_sink_signals[SIGNAL_CONNECTED], 0,
sink->sock_fd);
}
sink->pksize =
gst_dccp_get_max_packet_size (GST_ELEMENT (sink), sink->sock_fd);
return TRUE;
}
static void
gst_dccp_client_sink_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 (&sinktemplate));
gst_element_class_set_details_simple (element_class, "DCCP client sink",
"Sink/Network",
"Send data as a client over the network via DCCP",
"E-Phone Team at Federal University of Campina Grande <leandroal@gmail.com>");
}
static void
gst_dccp_client_sink_init (GstDCCPClientSink * this,
GstDCCPClientSinkClass * g_class)
{
this->port = DCCP_DEFAULT_PORT;
this->host = g_strdup (DCCP_DEFAULT_HOST);
this->sock_fd = DCCP_DEFAULT_SOCK_FD;
this->closed = DCCP_DEFAULT_CLOSED;
this->ccid = DCCP_DEFAULT_CCID;
}
static gboolean
gst_dccp_client_sink_stop (GstBaseSink * bsink)
{
GstDCCPClientSink *sink;
sink = GST_DCCP_CLIENT_SINK (bsink);
if (sink->sock_fd != DCCP_DEFAULT_SOCK_FD && sink->closed) {
gst_dccp_socket_close (GST_ELEMENT (sink), &(sink->sock_fd));
}
return TRUE;
}
/*
* Define the gst class, callbacks, etc.
*/
static void
gst_dccp_client_sink_class_init (GstDCCPClientSinkClass * klass)
{
GObjectClass *gobject_class;
GstBaseSinkClass *gstbasesink_class;
gobject_class = (GObjectClass *) klass;
gstbasesink_class = (GstBaseSinkClass *) klass;
gobject_class->set_property = gst_dccp_client_sink_set_property;
gobject_class->get_property = gst_dccp_client_sink_get_property;
gobject_class->finalize = gst_dccp_client_sink_finalize;
g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_PORT,
g_param_spec_int ("port", "Port",
"The port to send the packets to", 0, G_MAXUINT16,
DCCP_DEFAULT_PORT, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_HOST,
g_param_spec_string ("host", "Host",
"The host IP address to send packets to", DCCP_DEFAULT_HOST,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_SOCK_FD,
g_param_spec_int ("sockfd", "Socket fd",
"The socket file descriptor", -1, G_MAXINT,
DCCP_DEFAULT_SOCK_FD, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_CLOSE_FD,
g_param_spec_boolean ("close-socket", "Close",
"Close socket at end of stream",
DCCP_DEFAULT_CLOSED, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_CCID,
g_param_spec_int ("ccid", "CCID",
"The Congestion Control IDentified to be used", 2, G_MAXINT,
DCCP_DEFAULT_CCID, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
/* signals */
/**
* GstDccpClientSink::connected:
* @sink: the gstdccpclientsink element that emitted this signal
* @fd: the connected socket file descriptor
*
* Sign that the element has connected, return the fd of the socket.
*/
gst_dccp_client_sink_signals[SIGNAL_CONNECTED] =
g_signal_new ("connected", G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET (GstDCCPClientSinkClass, connected), NULL, NULL,
gst_marshal_VOID__INT, G_TYPE_NONE, 1, G_TYPE_INT);
gstbasesink_class->start = gst_dccp_client_sink_start;
gstbasesink_class->stop = gst_dccp_client_sink_stop;
gstbasesink_class->render = gst_dccp_client_sink_render;
GST_DEBUG_CATEGORY_INIT (dccpclientsink_debug, "dccpclientsink", 0,
"DCCP Client Sink");
}