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392 lines
11 KiB
C
392 lines
11 KiB
C
/* GStreamer
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* Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
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* Copyright (C) <2004> Thomas Vander Stichele <thomas at apestaart dot org>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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/**
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* SECTION:element-tcpclientsrc
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* @see_also: #tcpclientsink
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*
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* <refsect2>
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* <title>Example launch line</title>
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* |[
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* # server:
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* nc -l -p 3000
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* # client:
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* gst-launch tcpclientsrc protocol=none port=3000 ! fdsink fd=2
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* ]| everything you type in the server is shown on the client
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* </refsect2>
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <gst/gst-i18n-plugin.h>
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#include "gsttcp.h"
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#include "gsttcpclientsrc.h"
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#include <string.h> /* memset */
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#include <unistd.h>
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#include <arpa/inet.h>
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#include <fcntl.h>
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GST_DEBUG_CATEGORY_STATIC (tcpclientsrc_debug);
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#define GST_CAT_DEFAULT tcpclientsrc_debug
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#define MAX_READ_SIZE 4 * 1024
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static GstStaticPadTemplate srctemplate = GST_STATIC_PAD_TEMPLATE ("src",
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GST_PAD_SRC,
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GST_PAD_ALWAYS,
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GST_STATIC_CAPS_ANY);
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enum
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{
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PROP_0,
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PROP_HOST,
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PROP_PORT
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};
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#define gst_tcp_client_src_parent_class parent_class
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G_DEFINE_TYPE (GstTCPClientSrc, gst_tcp_client_src, GST_TYPE_PUSH_SRC);
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static void gst_tcp_client_src_finalize (GObject * gobject);
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static GstCaps *gst_tcp_client_src_getcaps (GstBaseSrc * psrc,
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GstCaps * filter);
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static GstFlowReturn gst_tcp_client_src_create (GstPushSrc * psrc,
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GstBuffer ** outbuf);
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static gboolean gst_tcp_client_src_stop (GstBaseSrc * bsrc);
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static gboolean gst_tcp_client_src_start (GstBaseSrc * bsrc);
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static gboolean gst_tcp_client_src_unlock (GstBaseSrc * bsrc);
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static gboolean gst_tcp_client_src_unlock_stop (GstBaseSrc * bsrc);
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static void gst_tcp_client_src_set_property (GObject * object, guint prop_id,
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const GValue * value, GParamSpec * pspec);
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static void gst_tcp_client_src_get_property (GObject * object, guint prop_id,
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GValue * value, GParamSpec * pspec);
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static void
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gst_tcp_client_src_class_init (GstTCPClientSrcClass * klass)
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{
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GObjectClass *gobject_class;
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GstElementClass *gstelement_class;
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GstBaseSrcClass *gstbasesrc_class;
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GstPushSrcClass *gstpush_src_class;
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gobject_class = (GObjectClass *) klass;
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gstelement_class = (GstElementClass *) klass;
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gstbasesrc_class = (GstBaseSrcClass *) klass;
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gstpush_src_class = (GstPushSrcClass *) klass;
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gobject_class->set_property = gst_tcp_client_src_set_property;
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gobject_class->get_property = gst_tcp_client_src_get_property;
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gobject_class->finalize = gst_tcp_client_src_finalize;
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g_object_class_install_property (gobject_class, PROP_HOST,
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g_param_spec_string ("host", "Host",
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"The host IP address to receive packets from", TCP_DEFAULT_HOST,
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G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
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g_object_class_install_property (gobject_class, PROP_PORT,
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g_param_spec_int ("port", "Port", "The port to receive packets from", 0,
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TCP_HIGHEST_PORT, TCP_DEFAULT_PORT,
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G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
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gst_element_class_add_pad_template (gstelement_class,
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gst_static_pad_template_get (&srctemplate));
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gst_element_class_set_details_simple (gstelement_class,
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"TCP client source", "Source/Network",
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"Receive data as a client over the network via TCP",
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"Thomas Vander Stichele <thomas at apestaart dot org>");
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gstbasesrc_class->get_caps = gst_tcp_client_src_getcaps;
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gstbasesrc_class->start = gst_tcp_client_src_start;
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gstbasesrc_class->stop = gst_tcp_client_src_stop;
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gstbasesrc_class->unlock = gst_tcp_client_src_unlock;
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gstbasesrc_class->unlock_stop = gst_tcp_client_src_unlock_stop;
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gstpush_src_class->create = gst_tcp_client_src_create;
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GST_DEBUG_CATEGORY_INIT (tcpclientsrc_debug, "tcpclientsrc", 0,
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"TCP Client Source");
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}
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static void
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gst_tcp_client_src_init (GstTCPClientSrc * this)
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{
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this->port = TCP_DEFAULT_PORT;
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this->host = g_strdup (TCP_DEFAULT_HOST);
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this->sock_fd.fd = -1;
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this->caps = NULL;
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GST_OBJECT_FLAG_UNSET (this, GST_TCP_CLIENT_SRC_OPEN);
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}
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static void
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gst_tcp_client_src_finalize (GObject * gobject)
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{
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GstTCPClientSrc *this = GST_TCP_CLIENT_SRC (gobject);
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g_free (this->host);
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G_OBJECT_CLASS (parent_class)->finalize (gobject);
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}
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static GstCaps *
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gst_tcp_client_src_getcaps (GstBaseSrc * bsrc, GstCaps * filter)
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{
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GstTCPClientSrc *src;
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GstCaps *caps = NULL;
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src = GST_TCP_CLIENT_SRC (bsrc);
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if (!GST_OBJECT_FLAG_IS_SET (src, GST_TCP_CLIENT_SRC_OPEN))
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caps = (filter ? gst_caps_ref (filter) : gst_caps_new_any ());
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else if (src->caps && filter)
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caps =
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gst_caps_intersect_full (filter, src->caps, GST_CAPS_INTERSECT_FIRST);
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else if (src->caps)
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caps = gst_caps_copy (src->caps);
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else
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caps = (filter ? gst_caps_ref (filter) : gst_caps_new_any ());
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GST_DEBUG_OBJECT (src, "returning caps %" GST_PTR_FORMAT, caps);
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g_assert (GST_IS_CAPS (caps));
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return caps;
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}
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static GstFlowReturn
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gst_tcp_client_src_create (GstPushSrc * psrc, GstBuffer ** outbuf)
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{
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GstTCPClientSrc *src;
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GstFlowReturn ret = GST_FLOW_OK;
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src = GST_TCP_CLIENT_SRC (psrc);
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if (!GST_OBJECT_FLAG_IS_SET (src, GST_TCP_CLIENT_SRC_OPEN))
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goto wrong_state;
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GST_LOG_OBJECT (src, "asked for a buffer");
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/* read the buffer header */
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ret = gst_tcp_read_buffer (GST_ELEMENT (src), src->sock_fd.fd,
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src->fdset, outbuf);
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if (ret == GST_FLOW_OK) {
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GST_LOG_OBJECT (src,
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"Returning buffer from _get of size %d, ts %"
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GST_TIME_FORMAT ", dur %" GST_TIME_FORMAT
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", offset %" G_GINT64_FORMAT ", offset_end %" G_GINT64_FORMAT,
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gst_buffer_get_size (*outbuf),
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GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (*outbuf)),
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GST_TIME_ARGS (GST_BUFFER_DURATION (*outbuf)),
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GST_BUFFER_OFFSET (*outbuf), GST_BUFFER_OFFSET_END (*outbuf));
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}
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return ret;
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wrong_state:
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{
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GST_DEBUG_OBJECT (src, "connection to closed, cannot read data");
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return GST_FLOW_WRONG_STATE;
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}
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}
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static void
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gst_tcp_client_src_set_property (GObject * object, guint prop_id,
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const GValue * value, GParamSpec * pspec)
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{
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GstTCPClientSrc *tcpclientsrc = GST_TCP_CLIENT_SRC (object);
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switch (prop_id) {
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case PROP_HOST:
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if (!g_value_get_string (value)) {
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g_warning ("host property cannot be NULL");
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break;
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}
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g_free (tcpclientsrc->host);
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tcpclientsrc->host = g_strdup (g_value_get_string (value));
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break;
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case PROP_PORT:
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tcpclientsrc->port = g_value_get_int (value);
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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break;
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}
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}
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static void
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gst_tcp_client_src_get_property (GObject * object, guint prop_id,
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GValue * value, GParamSpec * pspec)
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{
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GstTCPClientSrc *tcpclientsrc = GST_TCP_CLIENT_SRC (object);
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switch (prop_id) {
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case PROP_HOST:
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g_value_set_string (value, tcpclientsrc->host);
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break;
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case PROP_PORT:
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g_value_set_int (value, tcpclientsrc->port);
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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break;
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}
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}
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/* create a socket for connecting to remote server */
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static gboolean
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gst_tcp_client_src_start (GstBaseSrc * bsrc)
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{
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int ret;
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gchar *ip;
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GstTCPClientSrc *src = GST_TCP_CLIENT_SRC (bsrc);
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if ((src->fdset = gst_poll_new (TRUE)) == NULL)
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goto socket_pair;
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/* create receiving client socket */
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GST_DEBUG_OBJECT (src, "opening receiving client socket to %s:%d",
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src->host, src->port);
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if ((src->sock_fd.fd = socket (AF_INET, SOCK_STREAM, 0)) == -1)
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goto no_socket;
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GST_DEBUG_OBJECT (src, "opened receiving client socket with fd %d",
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src->sock_fd.fd);
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GST_OBJECT_FLAG_SET (src, GST_TCP_CLIENT_SRC_OPEN);
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/* look up name if we need to */
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if (!(ip = gst_tcp_host_to_ip (GST_ELEMENT (src), src->host)))
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goto name_resolv;
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GST_DEBUG_OBJECT (src, "IP address for host %s is %s", src->host, ip);
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/* connect to server */
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memset (&src->server_sin, 0, sizeof (src->server_sin));
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src->server_sin.sin_family = AF_INET; /* network socket */
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src->server_sin.sin_port = htons (src->port); /* on port */
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src->server_sin.sin_addr.s_addr = inet_addr (ip); /* on host ip */
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g_free (ip);
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GST_DEBUG_OBJECT (src, "connecting to server");
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ret = connect (src->sock_fd.fd, (struct sockaddr *) &src->server_sin,
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sizeof (src->server_sin));
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if (ret)
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goto connect_failed;
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/* add the socket to the poll */
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gst_poll_add_fd (src->fdset, &src->sock_fd);
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gst_poll_fd_ctl_read (src->fdset, &src->sock_fd, TRUE);
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return TRUE;
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socket_pair:
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{
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GST_ELEMENT_ERROR (src, RESOURCE, OPEN_READ_WRITE, (NULL),
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GST_ERROR_SYSTEM);
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return FALSE;
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}
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no_socket:
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{
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GST_ELEMENT_ERROR (src, RESOURCE, OPEN_READ, (NULL), GST_ERROR_SYSTEM);
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return FALSE;
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}
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name_resolv:
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{
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gst_tcp_client_src_stop (GST_BASE_SRC (src));
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return FALSE;
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}
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connect_failed:
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{
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gst_tcp_client_src_stop (GST_BASE_SRC (src));
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switch (errno) {
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case ECONNREFUSED:
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GST_ELEMENT_ERROR (src, RESOURCE, OPEN_READ,
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(_("Connection to %s:%d refused."), src->host, src->port), (NULL));
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break;
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default:
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GST_ELEMENT_ERROR (src, RESOURCE, OPEN_READ, (NULL),
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("connect to %s:%d failed: %s", src->host, src->port,
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g_strerror (errno)));
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break;
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}
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return FALSE;
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}
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}
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/* close the socket and associated resources
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* unset OPEN flag
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* used both to recover from errors and go to NULL state */
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static gboolean
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gst_tcp_client_src_stop (GstBaseSrc * bsrc)
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{
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GstTCPClientSrc *src;
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src = GST_TCP_CLIENT_SRC (bsrc);
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GST_DEBUG_OBJECT (src, "closing socket");
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if (src->fdset != NULL) {
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gst_poll_free (src->fdset);
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src->fdset = NULL;
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}
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gst_tcp_socket_close (&src->sock_fd);
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src->caps_received = FALSE;
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if (src->caps) {
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gst_caps_unref (src->caps);
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src->caps = NULL;
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}
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GST_OBJECT_FLAG_UNSET (src, GST_TCP_CLIENT_SRC_OPEN);
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return TRUE;
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}
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/* will be called only between calls to start() and stop() */
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static gboolean
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gst_tcp_client_src_unlock (GstBaseSrc * bsrc)
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{
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GstTCPClientSrc *src = GST_TCP_CLIENT_SRC (bsrc);
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GST_DEBUG_OBJECT (src, "set to flushing");
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gst_poll_set_flushing (src->fdset, TRUE);
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return TRUE;
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}
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/* will be called only between calls to start() and stop() */
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static gboolean
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gst_tcp_client_src_unlock_stop (GstBaseSrc * bsrc)
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{
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GstTCPClientSrc *src = GST_TCP_CLIENT_SRC (bsrc);
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GST_DEBUG_OBJECT (src, "unset flushing");
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gst_poll_set_flushing (src->fdset, FALSE);
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return TRUE;
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}
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