--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gstreamer_core/libs/gst/net/gstnettimeprovider.c	Thu Dec 17 08:53:32 2009 +0200
@@ -0,0 +1,514 @@
+/* GStreamer
+ * Copyright (C) 2005 Andy Wingo <wingo@pobox.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:gstnettimeprovider
+ * @short_description: Special object that exposed the time of a clock
+ *                     on the network.
+ * @see_also: #GstClock, #GstNetClientClock, #GstPipeline
+ *
+ * This object exposes the time of a #GstClock on the network.
+ *
+ * A #GstNetTimeProvider is created with gst_net_time_provider_new() which
+ * takes a #GstClock, an address and a port number as arguments.
+ *
+ * After creating the object, a client clock such as #GstNetClientClock can
+ * query the exposed clock over the network for its values.
+ *
+ * The #GstNetTimeProvider typically wraps the clock used by a #GstPipeline.
+ *
+ * Last reviewed on 2005-11-23 (0.9.5)
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include "gstnettimeprovider.h"
+#include "gstnettimepacket.h"
+
+#include <glib.h>
+
+#ifdef HAVE_UNISTD_H
+#include <unistd.h>
+#endif
+
+#if defined (_MSC_VER) && _MSC_VER >= 1400
+#include <io.h>
+#endif
+
+#ifndef G_OS_WIN32
+#include <sys/ioctl.h>
+#endif
+
+#ifdef HAVE_FIONREAD_IN_SYS_FILIO
+#include <sys/filio.h>
+#endif
+
+GST_DEBUG_CATEGORY_STATIC (ntp_debug);
+#define GST_CAT_DEFAULT (ntp_debug)
+
+#ifdef G_OS_WIN32
+#define close(sock) closesocket(sock)
+#endif
+
+#define DEFAULT_ADDRESS         "0.0.0.0"
+#define DEFAULT_PORT            5637
+
+#define IS_ACTIVE(self) (g_atomic_int_get (&((self)->active.active)))
+
+#ifdef G_OS_WIN32
+#define setsockopt(sock, sol_flags, reuse_flags, ru, sizeofru) setsockopt (sock, sol_flags, reuse_flags, (char *)ru, sizeofru)
+#endif
+enum
+{
+  PROP_0,
+  PROP_PORT,
+  PROP_ADDRESS,
+  PROP_CLOCK,
+  PROP_ACTIVE
+      /* FILL ME */
+};
+
+#define GST_NET_TIME_PROVIDER_GET_PRIVATE(obj)  \
+   (G_TYPE_INSTANCE_GET_PRIVATE ((obj), GST_TYPE_NET_TIME_PROVIDER, GstNetTimeProviderPrivate))
+
+struct _GstNetTimeProviderPrivate
+{
+  GstPollFD sock;
+  GstPoll *fdset;
+};
+
+static gboolean gst_net_time_provider_start (GstNetTimeProvider * bself);
+static void gst_net_time_provider_stop (GstNetTimeProvider * bself);
+
+static gpointer gst_net_time_provider_thread (gpointer data);
+
+static void gst_net_time_provider_finalize (GObject * object);
+static void gst_net_time_provider_set_property (GObject * object, guint prop_id,
+    const GValue * value, GParamSpec * pspec);
+static void gst_net_time_provider_get_property (GObject * object, guint prop_id,
+    GValue * value, GParamSpec * pspec);
+
+#define _do_init(type) \
+  GST_DEBUG_CATEGORY_INIT (ntp_debug, "nettime", 0, "Network time provider");
+
+GST_BOILERPLATE_FULL (GstNetTimeProvider, gst_net_time_provider, GstObject,
+    GST_TYPE_OBJECT, _do_init);
+
+#ifdef G_OS_WIN32
+static int
+inet_aton (const char *c, struct in_addr *paddr)
+{
+  paddr->s_addr = inet_addr (c);
+  if (paddr->s_addr == INADDR_NONE)
+    return 0;
+
+  return 1;
+}
+#endif
+
+static void
+gst_net_time_provider_base_init (gpointer g_class)
+{
+  /* Do nothing here */
+}
+
+static void
+gst_net_time_provider_class_init (GstNetTimeProviderClass * klass)
+{
+  GObjectClass *gobject_class;
+
+  gobject_class = G_OBJECT_CLASS (klass);
+
+  g_assert (sizeof (GstClockTime) == 8);
+
+  g_type_class_add_private (klass, sizeof (GstNetTimeProviderPrivate));
+
+  gobject_class->finalize = gst_net_time_provider_finalize;
+  gobject_class->set_property = gst_net_time_provider_set_property;
+  gobject_class->get_property = gst_net_time_provider_get_property;
+
+  g_object_class_install_property (gobject_class, PROP_PORT,
+      g_param_spec_int ("port", "port",
+          "The port to receive the packets from, 0=allocate", 0, G_MAXUINT16,
+          DEFAULT_PORT, G_PARAM_READWRITE));
+  g_object_class_install_property (gobject_class, PROP_ADDRESS,
+      g_param_spec_string ("address", "address",
+          "The address to bind on, as a dotted quad (x.x.x.x)",
+          DEFAULT_ADDRESS, G_PARAM_READWRITE));
+  g_object_class_install_property (gobject_class, PROP_CLOCK,
+      g_param_spec_object ("clock", "Clock",
+          "The clock to export over the network", GST_TYPE_CLOCK,
+          G_PARAM_READWRITE));
+  g_object_class_install_property (gobject_class, PROP_ACTIVE,
+      g_param_spec_boolean ("active", "Active",
+          "TRUE if the clock will respond to queries over the network", TRUE,
+          G_PARAM_READWRITE));
+}
+
+static void
+gst_net_time_provider_init (GstNetTimeProvider * self,
+    GstNetTimeProviderClass * g_class)
+{
+#ifdef G_OS_WIN32
+  WSADATA w;
+  int error = WSAStartup (0x0202, &w);
+
+  if (error) {
+    GST_DEBUG_OBJECT (self, "Error on WSAStartup");
+  }
+  if (w.wVersion != 0x0202) {
+    WSACleanup ();
+  }
+#endif
+  self->priv = GST_NET_TIME_PROVIDER_GET_PRIVATE (self);
+
+  self->port = DEFAULT_PORT;
+  self->priv->sock.fd = -1;
+  self->address = g_strdup (DEFAULT_ADDRESS);
+  self->thread = NULL;
+  self->active.active = TRUE;
+}
+
+static void
+gst_net_time_provider_finalize (GObject * object)
+{
+  GstNetTimeProvider *self = GST_NET_TIME_PROVIDER (object);
+
+  if (self->thread) {
+    gst_net_time_provider_stop (self);
+    g_assert (self->thread == NULL);
+  }
+
+  if (self->priv->fdset) {
+    gst_poll_free (self->priv->fdset);
+    self->priv->fdset = NULL;
+  }
+
+  g_free (self->address);
+  self->address = NULL;
+
+  if (self->clock)
+    gst_object_unref (self->clock);
+  self->clock = NULL;
+
+#ifdef G_OS_WIN32
+  WSACleanup ();
+#endif
+
+  G_OBJECT_CLASS (parent_class)->finalize (object);
+}
+
+static gpointer
+gst_net_time_provider_thread (gpointer data)
+{
+  GstNetTimeProvider *self = data;
+  struct sockaddr_in tmpaddr;
+  socklen_t len;
+  GstNetTimePacket *packet;
+  gint ret;
+
+  while (TRUE) {
+    GST_LOG_OBJECT (self, "doing select");
+    ret = gst_poll_wait (self->priv->fdset, GST_CLOCK_TIME_NONE);
+    GST_LOG_OBJECT (self, "select returned %d", ret);
+
+    if (ret <= 0) {
+      if (errno == EBUSY) {
+        GST_LOG_OBJECT (self, "stop");
+        goto stopped;
+      } else if (errno != EAGAIN && errno != EINTR)
+        goto select_error;
+      else
+        continue;
+    } else {
+      /* got data in */
+      len = sizeof (struct sockaddr);
+
+      packet = gst_net_time_packet_receive (self->priv->sock.fd,
+          (struct sockaddr *) &tmpaddr, &len);
+
+      if (!packet)
+        goto receive_error;
+
+      if (IS_ACTIVE (self)) {
+        /* do what we were asked to and send the packet back */
+        packet->remote_time = gst_clock_get_time (self->clock);
+
+        /* ignore errors */
+        gst_net_time_packet_send (packet, self->priv->sock.fd,
+            (struct sockaddr *) &tmpaddr, len);
+      }
+
+      g_free (packet);
+
+      continue;
+    }
+
+    g_assert_not_reached ();
+
+    /* log errors and keep going */
+  select_error:
+    {
+      GST_DEBUG_OBJECT (self, "select error %d: %s (%d)", ret,
+          g_strerror (errno), errno);
+      continue;
+    }
+  stopped:
+    {
+      GST_DEBUG_OBJECT (self, "shutting down");
+      /* close socket */
+      return NULL;
+    }
+  receive_error:
+    {
+      GST_DEBUG_OBJECT (self, "receive error");
+      continue;
+    }
+
+    g_assert_not_reached ();
+
+  }
+
+  g_assert_not_reached ();
+
+  return NULL;
+}
+
+static void
+gst_net_time_provider_set_property (GObject * object, guint prop_id,
+    const GValue * value, GParamSpec * pspec)
+{
+  GstNetTimeProvider *self = GST_NET_TIME_PROVIDER (object);
+  GstClock **clock_p = &self->clock;
+
+  switch (prop_id) {
+    case PROP_PORT:
+      self->port = g_value_get_int (value);
+      break;
+    case PROP_ADDRESS:
+      g_free (self->address);
+      if (g_value_get_string (value) == NULL)
+        self->address = g_strdup (DEFAULT_ADDRESS);
+      else
+        self->address = g_strdup (g_value_get_string (value));
+      break;
+    case PROP_CLOCK:
+      gst_object_replace ((GstObject **) clock_p,
+          (GstObject *) g_value_get_object (value));
+      break;
+    case PROP_ACTIVE:
+      gst_atomic_int_set (&self->active.active, g_value_get_boolean (value));
+      break;
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+      break;
+  }
+}
+
+static void
+gst_net_time_provider_get_property (GObject * object, guint prop_id,
+    GValue * value, GParamSpec * pspec)
+{
+  GstNetTimeProvider *self = GST_NET_TIME_PROVIDER (object);
+
+  switch (prop_id) {
+    case PROP_PORT:
+      g_value_set_int (value, self->port);
+      break;
+    case PROP_ADDRESS:
+      g_value_set_string (value, self->address);
+      break;
+    case PROP_CLOCK:
+      g_value_set_object (value, self->clock);
+      break;
+    case PROP_ACTIVE:
+      g_value_set_boolean (value, IS_ACTIVE (self));
+      break;
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+      break;
+  }
+}
+
+static gboolean
+gst_net_time_provider_start (GstNetTimeProvider * self)
+{
+  gint ru;
+  struct sockaddr_in my_addr;
+  guint len;
+  int port;
+  gint ret;
+  GError *error;
+
+  if ((ret = socket (AF_INET, SOCK_DGRAM, 0)) < 0)
+    goto no_socket;
+
+  self->priv->sock.fd = ret;
+
+  ru = 1;
+  ret =
+      setsockopt (self->priv->sock.fd, SOL_SOCKET, SO_REUSEADDR, &ru,
+      sizeof (ru));
+  if (ret < 0)
+    goto setsockopt_error;
+
+  memset (&my_addr, 0, sizeof (my_addr));
+  my_addr.sin_family = AF_INET; /* host byte order */
+  my_addr.sin_port = htons ((gint16) self->port);       /* short, network byte order */
+  my_addr.sin_addr.s_addr = INADDR_ANY;
+  if (self->address)
+    inet_aton (self->address, &my_addr.sin_addr);
+
+  GST_DEBUG_OBJECT (self, "binding on port %d", self->port);
+  ret =
+      bind (self->priv->sock.fd, (struct sockaddr *) &my_addr,
+      sizeof (my_addr));
+  if (ret < 0)
+    goto bind_error;
+
+  len = sizeof (my_addr);
+  ret = getsockname (self->priv->sock.fd, (struct sockaddr *) &my_addr, &len);
+  if (ret < 0)
+    goto getsockname_error;
+
+  port = ntohs (my_addr.sin_port);
+  GST_DEBUG_OBJECT (self, "bound, on port %d", port);
+
+  if (port != self->port) {
+    self->port = port;
+    GST_DEBUG_OBJECT (self, "notifying %d", port);
+    g_object_notify (G_OBJECT (self), "port");
+  }
+
+  gst_poll_add_fd (self->priv->fdset, &self->priv->sock);
+  gst_poll_fd_ctl_read (self->priv->fdset, &self->priv->sock, TRUE);
+
+  self->thread = g_thread_create (gst_net_time_provider_thread, self, TRUE,
+      &error);
+  if (!self->thread)
+    goto no_thread;
+
+  return TRUE;
+
+  /* ERRORS */
+no_socket:
+  {
+    GST_ERROR_OBJECT (self, "socket failed %d: %s (%d)", ret,
+        g_strerror (errno), errno);
+    return FALSE;
+  }
+setsockopt_error:
+  {
+    close (self->priv->sock.fd);
+    self->priv->sock.fd = -1;
+    GST_ERROR_OBJECT (self, "setsockopt failed %d: %s (%d)", ret,
+        g_strerror (errno), errno);
+    return FALSE;
+  }
+bind_error:
+  {
+    close (self->priv->sock.fd);
+    self->priv->sock.fd = -1;
+    GST_ERROR_OBJECT (self, "bind failed %d: %s (%d)", ret,
+        g_strerror (errno), errno);
+    return FALSE;
+  }
+getsockname_error:
+  {
+    close (self->priv->sock.fd);
+    self->priv->sock.fd = -1;
+    GST_ERROR_OBJECT (self, "getsockname failed %d: %s (%d)", ret,
+        g_strerror (errno), errno);
+    return FALSE;
+  }
+no_thread:
+  {
+    gst_poll_remove_fd (self->priv->fdset, &self->priv->sock);
+    close (self->priv->sock.fd);
+    self->priv->sock.fd = -1;
+    GST_ERROR_OBJECT (self, "could not create thread: %s", error->message);
+    g_error_free (error);
+    return FALSE;
+  }
+}
+
+static void
+gst_net_time_provider_stop (GstNetTimeProvider * self)
+{
+  gst_poll_set_flushing (self->priv->fdset, TRUE);
+  g_thread_join (self->thread);
+  self->thread = NULL;
+
+  if (self->priv->sock.fd != -1) {
+    gst_poll_remove_fd (self->priv->fdset, &self->priv->sock);
+    close (self->priv->sock.fd);
+    self->priv->sock.fd = -1;
+  }
+}
+
+/**
+ * gst_net_time_provider_new:
+ * @clock: a #GstClock to export over the network
+ * @address: an address to bind on as a dotted quad (xxx.xxx.xxx.xxx), or NULL
+ *           to bind to all addresses
+ * @port: a port to bind on, or 0 to let the kernel choose
+ *
+ * Allows network clients to get the current time of @clock.
+ *
+ * Returns: the new #GstNetTimeProvider, or NULL on error
+ */
+#ifdef __SYMBIAN32__
+EXPORT_C
+#endif
+
+GstNetTimeProvider *
+gst_net_time_provider_new (GstClock * clock, const gchar * address, gint port)
+{
+  GstNetTimeProvider *ret;
+
+  g_return_val_if_fail (clock && GST_IS_CLOCK (clock), NULL);
+  g_return_val_if_fail (port >= 0 && port <= G_MAXUINT16, NULL);
+
+  ret = g_object_new (GST_TYPE_NET_TIME_PROVIDER, "clock", clock, "address",
+      address, "port", port, NULL);
+
+  if ((ret->priv->fdset = gst_poll_new (TRUE)) == NULL)
+    goto no_fdset;
+
+  if (!gst_net_time_provider_start (ret))
+    goto failed_start;
+
+  /* all systems go, cap'n */
+  return ret;
+
+no_fdset:
+  {
+    GST_ERROR_OBJECT (ret, "could not create an fdset: %s (%d)",
+        g_strerror (errno), errno);
+    gst_object_unref (ret);
+    return NULL;
+  }
+failed_start:
+  {
+    /* already printed a nice error */
+    gst_object_unref (ret);
+    return NULL;
+  }
+}