/* GStreamer * Copyright (C) <1999> Erik Walthinsen * Copyright (C) <2004> Thomas Vander Stichele * * 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. */ #ifdef HAVE_CONFIG_H #include "config.h" #endif #include #include "gsttcp.h" #include "gsttcpclientsrc.h" #include /* memset */ #include #include #include #include #include #ifdef FIONREAD_IN_SYS_FILIO #include #endif GST_DEBUG_CATEGORY (tcpclientsrc_debug); #define GST_CAT_DEFAULT tcpclientsrc_debug #define TCP_DEFAULT_PORT 4953 #define TCP_DEFAULT_HOST "localhost" #define MAX_READ_SIZE 4 * 1024 /* elementfactory information */ static GstElementDetails gst_tcpclientsrc_details = GST_ELEMENT_DETAILS ("TCP Client source", "Source/Network", "Receive data as a client over the network via TCP", "Thomas Vander Stichele "); /* TCPClientSrc signals and args */ enum { LAST_SIGNAL }; enum { ARG_0, ARG_PORT, ARG_HOST, ARG_PROTOCOL }; static void gst_tcpclientsrc_base_init (gpointer g_class); static void gst_tcpclientsrc_class_init (GstTCPClientSrc * klass); static void gst_tcpclientsrc_init (GstTCPClientSrc * tcpclientsrc); static GstData *gst_tcpclientsrc_get (GstPad * pad); static GstElementStateReturn gst_tcpclientsrc_change_state (GstElement * element); static void gst_tcpclientsrc_set_property (GObject * object, guint prop_id, const GValue * value, GParamSpec * pspec); static void gst_tcpclientsrc_get_property (GObject * object, guint prop_id, GValue * value, GParamSpec * pspec); static void gst_tcpclientsrc_set_clock (GstElement * element, GstClock * clock); static GstElementClass *parent_class = NULL; /*static guint gst_tcpclientsrc_signals[LAST_SIGNAL] = { 0 }; */ GType gst_tcpclientsrc_get_type (void) { static GType tcpclientsrc_type = 0; if (!tcpclientsrc_type) { static const GTypeInfo tcpclientsrc_info = { sizeof (GstTCPClientSrcClass), gst_tcpclientsrc_base_init, NULL, (GClassInitFunc) gst_tcpclientsrc_class_init, NULL, NULL, sizeof (GstTCPClientSrc), 0, (GInstanceInitFunc) gst_tcpclientsrc_init, NULL }; tcpclientsrc_type = g_type_register_static (GST_TYPE_ELEMENT, "GstTCPClientSrc", &tcpclientsrc_info, 0); } return tcpclientsrc_type; } static void gst_tcpclientsrc_base_init (gpointer g_class) { GstElementClass *element_class = GST_ELEMENT_CLASS (g_class); gst_element_class_set_details (element_class, &gst_tcpclientsrc_details); } static void gst_tcpclientsrc_class_init (GstTCPClientSrc * klass) { GObjectClass *gobject_class; GstElementClass *gstelement_class; gobject_class = (GObjectClass *) klass; gstelement_class = (GstElementClass *) klass; parent_class = g_type_class_ref (GST_TYPE_ELEMENT); g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_HOST, g_param_spec_string ("host", "Host", "The host IP address to receive packets from", TCP_DEFAULT_HOST, G_PARAM_READWRITE)); g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_PORT, g_param_spec_int ("port", "Port", "The port to receive packets from", 0, 32768, TCP_DEFAULT_PORT, G_PARAM_READWRITE)); g_object_class_install_property (gobject_class, ARG_PROTOCOL, g_param_spec_enum ("protocol", "Protocol", "The protocol to wrap data in", GST_TYPE_TCP_PROTOCOL_TYPE, GST_TCP_PROTOCOL_TYPE_GDP, G_PARAM_READWRITE)); gobject_class->set_property = gst_tcpclientsrc_set_property; gobject_class->get_property = gst_tcpclientsrc_get_property; gstelement_class->change_state = gst_tcpclientsrc_change_state; gstelement_class->set_clock = gst_tcpclientsrc_set_clock; GST_DEBUG_CATEGORY_INIT (tcpclientsrc_debug, "tcpclientsrc", 0, "TCP Client Source"); } static void gst_tcpclientsrc_set_clock (GstElement * element, GstClock * clock) { GstTCPClientSrc *tcpclientsrc; tcpclientsrc = GST_TCPCLIENTSRC (element); tcpclientsrc->clock = clock; } static void gst_tcpclientsrc_init (GstTCPClientSrc * this) { /* create the src pad */ this->srcpad = gst_pad_new ("src", GST_PAD_SRC); gst_element_add_pad (GST_ELEMENT (this), this->srcpad); gst_pad_set_get_function (this->srcpad, gst_tcpclientsrc_get); this->port = TCP_DEFAULT_PORT; this->host = g_strdup (TCP_DEFAULT_HOST); this->clock = NULL; this->sock_fd = -1; this->protocol = GST_TCP_PROTOCOL_TYPE_GDP; this->curoffset = 0; GST_FLAG_UNSET (this, GST_TCPCLIENTSRC_OPEN); } static GstData * gst_tcpclientsrc_get (GstPad * pad) { GstTCPClientSrc *src; size_t readsize; int ret; GstData *data = NULL; GstBuffer *buf = NULL; GstCaps *caps; g_return_val_if_fail (pad != NULL, NULL); g_return_val_if_fail (GST_IS_PAD (pad), NULL); src = GST_TCPCLIENTSRC (GST_OBJECT_PARENT (pad)); g_return_val_if_fail (GST_FLAG_IS_SET (src, GST_TCPCLIENTSRC_OPEN), NULL); /* if we have a left over buffer after a discont, return that */ if (src->buffer_after_discont) { buf = src->buffer_after_discont; GST_LOG_OBJECT (src, "Returning buffer after discont of size %d with timestamp %" GST_TIME_FORMAT " and duration %" GST_TIME_FORMAT, GST_BUFFER_SIZE (buf), GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (buf)), GST_TIME_ARGS (GST_BUFFER_DURATION (buf))); src->buffer_after_discont = NULL; return GST_DATA (buf); } /* read the buffer header if we're using a protocol */ switch (src->protocol) { fd_set testfds; case GST_TCP_PROTOCOL_TYPE_NONE: /* do a blocking select on the socket */ FD_ZERO (&testfds); FD_SET (src->sock_fd, &testfds); ret = select (src->sock_fd + 1, &testfds, (fd_set *) 0, (fd_set *) 0, 0); /* no action (0) is an error too in our case */ if (ret <= 0) { GST_ELEMENT_ERROR (src, RESOURCE, READ, (NULL), ("select failed: %s", g_strerror (errno))); return NULL; } /* ask how much is available for reading on the socket */ ret = ioctl (src->sock_fd, FIONREAD, &readsize); if (ret < 0) { GST_ELEMENT_ERROR (src, RESOURCE, READ, (NULL), ("ioctl failed: %s", g_strerror (errno))); return NULL; } buf = gst_buffer_new_and_alloc (readsize); break; case GST_TCP_PROTOCOL_TYPE_GDP: /* if we haven't received caps yet, we should get them first */ if (!src->caps_received) { gchar *string; if (!(caps = gst_tcp_gdp_read_caps (GST_ELEMENT (src), src->sock_fd))) { GST_ELEMENT_ERROR (src, RESOURCE, READ, (NULL), ("Could not read caps through GDP")); return NULL; } src->caps_received = TRUE; string = gst_caps_to_string (caps); GST_DEBUG_OBJECT (src, "Received caps through GDP: %s", string); g_free (string); if (!gst_pad_try_set_caps (pad, caps)) { g_warning ("Could not set caps"); return NULL; } } /* now receive the buffer header */ if (!(data = gst_tcp_gdp_read_header (GST_ELEMENT (src), src->sock_fd))) { GST_ELEMENT_ERROR (src, RESOURCE, READ, (NULL), ("Could not read data header through GDP")); return NULL; } if (GST_IS_EVENT (data)) return data; buf = GST_BUFFER (data); GST_LOG_OBJECT (src, "Going to read data from socket into buffer %p", buf); /* use this new buffer to read data into */ readsize = GST_BUFFER_SIZE (buf); break; default: g_warning ("Unhandled protocol type"); break; } GST_LOG_OBJECT (src, "Reading %d bytes", readsize); ret = gst_tcp_socket_read (src->sock_fd, GST_BUFFER_DATA (buf), readsize); if (ret < 0) { GST_ELEMENT_ERROR (src, RESOURCE, READ, (NULL), GST_ERROR_SYSTEM); return NULL; } /* if we read 0 bytes, and we're blocking, we hit eos */ if (ret == 0) { GST_DEBUG ("blocking read returns 0, EOS"); gst_buffer_unref (buf); gst_element_set_eos (GST_ELEMENT (src)); return GST_DATA (gst_event_new (GST_EVENT_EOS)); } readsize = ret; GST_BUFFER_SIZE (buf) = readsize; GST_BUFFER_MAXSIZE (buf) = readsize; GST_BUFFER_OFFSET (buf) = src->curoffset; GST_BUFFER_OFFSET_END (buf) = src->curoffset + readsize; /* if this is our first buffer, we need to send a discont with the * given timestamp or the current offset, and store the buffer for * the next iteration through the get loop */ if (src->send_discont) { GstClockTime timestamp; GstEvent *event; src->send_discont = FALSE; src->buffer_after_discont = buf; /* if the timestamp is valid, send a timed discont * taking into account the incoming buffer's timestamps */ timestamp = GST_BUFFER_TIMESTAMP (buf); if (GST_CLOCK_TIME_IS_VALID (timestamp)) { GST_DEBUG_OBJECT (src, "sending discontinuous with timestamp %" GST_TIME_FORMAT, GST_TIME_ARGS (timestamp)); event = gst_event_new_discontinuous (FALSE, GST_FORMAT_TIME, timestamp, NULL); return GST_DATA (event); } /* otherwise, send an offset discont */ GST_DEBUG_OBJECT (src, "sending discontinuous with offset %d", src->curoffset); event = gst_event_new_discontinuous (FALSE, GST_FORMAT_BYTES, src->curoffset, NULL); return GST_DATA (event); } src->curoffset += readsize; GST_LOG_OBJECT (src, "Returning buffer of size %d with timestamp %" GST_TIME_FORMAT " and duration %" GST_TIME_FORMAT, readsize, GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (buf)), GST_TIME_ARGS (GST_BUFFER_DURATION (buf))); return GST_DATA (buf); } static void gst_tcpclientsrc_set_property (GObject * object, guint prop_id, const GValue * value, GParamSpec * pspec) { GstTCPClientSrc *tcpclientsrc; /* it's not null if we got it, but it might not be ours */ g_return_if_fail (GST_IS_TCPCLIENTSRC (object)); tcpclientsrc = GST_TCPCLIENTSRC (object); switch (prop_id) { case ARG_PORT: tcpclientsrc->port = g_value_get_int (value); break; case ARG_HOST: /* FIXME: create a setter and handle changes correctly */ g_free (tcpclientsrc->host); tcpclientsrc->host = g_strdup (g_value_get_string (value)); break; case ARG_PROTOCOL: tcpclientsrc->protocol = g_value_get_enum (value); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); break; } } static void gst_tcpclientsrc_get_property (GObject * object, guint prop_id, GValue * value, GParamSpec * pspec) { GstTCPClientSrc *tcpclientsrc; g_return_if_fail (GST_IS_TCPCLIENTSRC (object)); tcpclientsrc = GST_TCPCLIENTSRC (object); switch (prop_id) { case ARG_PORT: g_value_set_int (value, tcpclientsrc->port); break; case ARG_HOST: g_value_set_string (value, tcpclientsrc->host); break; case ARG_PROTOCOL: g_value_set_enum (value, tcpclientsrc->protocol); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); break; } } /* create a socket for connecting to remote server */ static gboolean gst_tcpclientsrc_init_receive (GstTCPClientSrc * this) { int ret; gchar *ip; /* create receiving client socket */ GST_DEBUG_OBJECT (this, "opening receiving client socket to %s:%d", this->host, this->port); if ((this->sock_fd = socket (AF_INET, SOCK_STREAM, 0)) == -1) { GST_ELEMENT_ERROR (this, RESOURCE, OPEN_READ, (NULL), GST_ERROR_SYSTEM); return FALSE; } GST_DEBUG_OBJECT (this, "opened receiving client socket with fd %d", this->sock_fd); /* look up name if we need to */ ip = gst_tcp_host_to_ip (GST_ELEMENT (this), this->host); if (!ip) return FALSE; GST_DEBUG_OBJECT (this, "IP address for host %s is %s", this->host, ip); /* connect to server */ memset (&this->server_sin, 0, sizeof (this->server_sin)); this->server_sin.sin_family = AF_INET; /* network socket */ this->server_sin.sin_port = htons (this->port); /* on port */ this->server_sin.sin_addr.s_addr = inet_addr (ip); /* on host ip */ GST_DEBUG_OBJECT (this, "connecting to server"); ret = connect (this->sock_fd, (struct sockaddr *) &this->server_sin, sizeof (this->server_sin)); if (ret) { switch (errno) { case ECONNREFUSED: GST_ELEMENT_ERROR (this, RESOURCE, OPEN_READ, (_("Connection to %s:%d refused."), this->host, this->port), (NULL)); return FALSE; break; default: GST_ELEMENT_ERROR (this, RESOURCE, OPEN_READ, (NULL), ("connect to %s:%d failed: %s", this->host, this->port, g_strerror (errno))); return FALSE; break; } } this->send_discont = TRUE; this->buffer_after_discont = NULL; GST_FLAG_SET (this, GST_TCPCLIENTSRC_OPEN); return TRUE; } static void gst_tcpclientsrc_close (GstTCPClientSrc * this) { if (this->sock_fd != -1) { close (this->sock_fd); this->sock_fd = -1; } GST_FLAG_UNSET (this, GST_TCPCLIENTSRC_OPEN); } static GstElementStateReturn gst_tcpclientsrc_change_state (GstElement * element) { g_return_val_if_fail (GST_IS_TCPCLIENTSRC (element), GST_STATE_FAILURE); if (GST_STATE_PENDING (element) == GST_STATE_NULL) { if (GST_FLAG_IS_SET (element, GST_TCPCLIENTSRC_OPEN)) gst_tcpclientsrc_close (GST_TCPCLIENTSRC (element)); } else { if (!GST_FLAG_IS_SET (element, GST_TCPCLIENTSRC_OPEN)) { if (!gst_tcpclientsrc_init_receive (GST_TCPCLIENTSRC (element))) return GST_STATE_FAILURE; } } if (GST_ELEMENT_CLASS (parent_class)->change_state) return GST_ELEMENT_CLASS (parent_class)->change_state (element); return GST_STATE_SUCCESS; }