MCL/sf/mw/gstreamer: comparison gst_plugins_base/gst/tcp/gstmultifdsink.c

equal deleted inserted replaced

-:4c282e7dd6d3
+:5505e8908944
+/* GStreamer
+* Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
+* Copyright (C) <2004> Thomas Vander Stichele <thomas at apestaart dot org>
+* Copyright (C) 2006 Wim Taymans <wim at fluendo dot 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-multifdsink
+* @short_description: Send data to multiple file descriptors
+* @see_also: tcpserversink
+*
+* <refsect2>
+* <para>
+* This plugin writes incoming data to a set of file descriptors. The
+* file descriptors can be added to multifdsink by emitting the "add" signal.
+* For each descriptor added, the "client-added" signal will be called.
+* </para>
+* <para>
+* As of version 0.10.8, a client can also be added with the "add-full" signal
+* that allows for more control over what and how much data a client
+* initially receives.
+* </para>
+* <para>
+* Clients can be removed from multifdsink by emitting the "remove" signal. For
+* each descriptor removed, the "client-removed" signal will be called. The
+* "client-removed" signal can also be fired when multifdsink decides that a
+* client is not active anymore or, depending on the value of the
+* "recover-policy" property, if the client is reading too slowly.
+* In all cases, multifdsink will never close a file descriptor itself.
+* The user of multifdsink is responsible for closing all file descriptors.
+* This can for example be done in response to the "client-fd-removed" signal.
+* Note that multifdsink still has a reference to the file descriptor when the
+* "client-removed" signal is emitted, so that "get-stats" can be performed on
+* the descriptor; it is therefore not safe to close the file descriptor in
+* the "client-removed" signal handler, and you should use the
+* "client-fd-removed" signal to safely close the fd.
+* </para>
+* <para>
+* Multifdsink internally keeps a queue of the incoming buffers and uses a
+* separate thread to send the buffers to the clients. This ensures that no
+* client write can block the pipeline and that clients can read with different
+* speeds.
+* </para>
+* <para>
+* When adding a client to multifdsink, the "sync-method" property will define
+* which buffer in the queued buffers will be sent first to the client. Clients
+* can be sent the most recent buffer (which might not be decodable by the
+* client if it is not a keyframe), the next keyframe received in
+* multifdsink (which can take some time depending on the keyframe rate), or the
+* last received keyframe (which will cause a simple burst-on-connect).
+* Multifdsink will always keep at least one keyframe in its internal buffers
+* when the sync-mode is set to latest-keyframe.
+* </para>
+* <para>
+* As of version 0.10.8, there are additional values for the sync-method
+* property to allow finer control over burst-on-connect behaviour. By selecting
+* the 'burst' method a minimum burst size can be chosen, 'burst-keyframe'
+* additionally requires that the burst begin with a keyframe, and
+* 'burst-with-keyframe' attempts to burst beginning with a keyframe, but will
+* prefer a minimum burst size even if it requires not starting with a keyframe.
+* </para>
+* <para>
+* Multifdsink can be instructed to keep at least a minimum amount of data
+* expressed in time or byte units in its internal queues with the the
+* "time-min" and "bytes-min" properties respectively. These properties are
+* useful if the application adds clients with the "add-full" signal to
+* make sure that a burst connect can actually be honored.
+* </para>
+* <para>
+* When streaming data, clients are allowed to read at a different rate than
+* the rate at which multifdsink receives data. If the client is reading too
+* fast, no data will be send to the client until multifdsink receives more
+* data. If the client, however, reads too slowly, data for that client will be
+* queued up in multifdsink. Two properties control the amount of data
+* (buffers) that is queued in multifdsink: "buffers-max" and
+* "buffers-soft-max". A client that falls behind by "buffers-max" is removed
+* from multifdsink forcibly.
+* </para>
+* <para>
+* A client with a lag of at least "buffers-soft-max" enters the recovery
+* procedure which is controlled with the "recover-policy" property. A recover
+* policy of NONE will do nothing, RESYNC_LATEST will send the most recently
+* received buffer as the next buffer for the client, RESYNC_SOFT_LIMIT
+* positions the client to the soft limit in the buffer queue and
+* RESYNC_KEYFRAME positions the client at the most recent keyframe in the
+* buffer queue.
+* </para>
+* <para>
+* multifdsink will by default synchronize on the clock before serving the
+* buffers to the clients. This behaviour can be disabled by setting the sync
+* property to FALSE. Multifdsink will by default not do QoS and will never
+* drop late buffers.
+* </para>
+* </refsect2>
+*
+* Last reviewed on 2006-09-12 (0.10.10)
+*/
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+#include <gst/gst-i18n-plugin.h>
+#include <sys/ioctl.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <sys/stat.h>
+#ifdef HAVE_FIONREAD_IN_SYS_FILIO
+#include <sys/filio.h>
+#endif
+#include "gstmultifdsink.h"
+#include "gsttcp-marshal.h"
+#define NOT_IMPLEMENTED 0
+/* elementfactory information */
+static const GstElementDetails gst_multi_fd_sink_details =
+GST_ELEMENT_DETAILS ("Multi filedescriptor sink",
+"Sink/Network",
+"Send data to multiple filedescriptors",
+"Thomas Vander Stichele <thomas at apestaart dot org>, "
+"Wim Taymans <wim@fluendo.com>");
+static GstStaticPadTemplate sinktemplate = GST_STATIC_PAD_TEMPLATE ("sink",
+GST_PAD_SINK,
+GST_PAD_ALWAYS,
+GST_STATIC_CAPS_ANY);
+GST_DEBUG_CATEGORY_STATIC (multifdsink_debug);
+#define GST_CAT_DEFAULT (multifdsink_debug)
+/* MultiFdSink signals and args */
+enum
+{
+/* methods */
+SIGNAL_ADD,
+SIGNAL_ADD_BURST,
+SIGNAL_REMOVE,
+SIGNAL_REMOVE_FLUSH,
+SIGNAL_CLEAR,
+SIGNAL_GET_STATS,
+/* signals */
+SIGNAL_CLIENT_ADDED,
+SIGNAL_CLIENT_REMOVED,
+SIGNAL_CLIENT_FD_REMOVED,
+LAST_SIGNAL
+};
+/* this is really arbitrarily chosen */
+#define DEFAULT_PROTOCOL                GST_TCP_PROTOCOL_NONE
+#define DEFAULT_MODE                    1
+#define DEFAULT_BUFFERS_MAX             -1
+#define DEFAULT_BUFFERS_SOFT_MAX        -1
+#define DEFAULT_TIME_MIN                -1
+#define DEFAULT_BYTES_MIN               -1
+#define DEFAULT_BUFFERS_MIN             -1
+#define DEFAULT_UNIT_TYPE               GST_UNIT_TYPE_BUFFERS
+#define DEFAULT_UNITS_MAX               -1
+#define DEFAULT_UNITS_SOFT_MAX          -1
+#define DEFAULT_RECOVER_POLICY          GST_RECOVER_POLICY_NONE
+#define DEFAULT_TIMEOUT                 0
+#define DEFAULT_SYNC_METHOD             GST_SYNC_METHOD_LATEST
+#define DEFAULT_BURST_UNIT              GST_UNIT_TYPE_UNDEFINED
+#define DEFAULT_BURST_VALUE             0
+enum
+{
+PROP_0,
+PROP_PROTOCOL,
+PROP_MODE,
+PROP_BUFFERS_QUEUED,
+PROP_BYTES_QUEUED,
+PROP_TIME_QUEUED,
+PROP_UNIT_TYPE,
+PROP_UNITS_MAX,
+PROP_UNITS_SOFT_MAX,
+PROP_BUFFERS_MAX,
+PROP_BUFFERS_SOFT_MAX,
+PROP_TIME_MIN,
+PROP_BYTES_MIN,
+PROP_BUFFERS_MIN,
+PROP_RECOVER_POLICY,
+PROP_TIMEOUT,
+PROP_SYNC_METHOD,
+PROP_BYTES_TO_SERVE,
+PROP_BYTES_SERVED,
+PROP_BURST_UNIT,
+PROP_BURST_VALUE,
+};
+/* For backward compat, we can't really select the poll mode anymore with
+* GstPoll. */
+#define GST_TYPE_FDSET_MODE (gst_fdset_mode_get_type())
+static GType
+gst_fdset_mode_get_type (void)
+{
+static GType fdset_mode_type = 0;
+static const GEnumValue fdset_mode[] = {
+{0, "Select", "select"},
+{1, "Poll", "poll"},
+{2, "EPoll", "epoll"},
+{0, NULL, NULL},
+};
+if (!fdset_mode_type) {
+fdset_mode_type = g_enum_register_static ("GstFDSetMode", fdset_mode);
+}
+return fdset_mode_type;
+}
+#define GST_TYPE_RECOVER_POLICY (gst_recover_policy_get_type())
+static GType
+gst_recover_policy_get_type (void)
+{
+static GType recover_policy_type = 0;
+static const GEnumValue recover_policy[] = {
+{GST_RECOVER_POLICY_NONE,
+"Do not try to recover", "none"},
+{GST_RECOVER_POLICY_RESYNC_LATEST,
+"Resync client to latest buffer", "latest"},
+{GST_RECOVER_POLICY_RESYNC_SOFT_LIMIT,
+"Resync client to soft limit", "soft-limit"},
+{GST_RECOVER_POLICY_RESYNC_KEYFRAME,
+"Resync client to most recent keyframe", "keyframe"},
+{0, NULL, NULL},
+};
+if (!recover_policy_type) {
+recover_policy_type =
+g_enum_register_static ("GstRecoverPolicy", recover_policy);
+}
+return recover_policy_type;
+}
+#define GST_TYPE_SYNC_METHOD (gst_sync_method_get_type())
+static GType
+gst_sync_method_get_type (void)
+{
+static GType sync_method_type = 0;
+static const GEnumValue sync_method[] = {
+{GST_SYNC_METHOD_LATEST,
+"Serve starting from the latest buffer", "latest"},
+{GST_SYNC_METHOD_NEXT_KEYFRAME,
+"Serve starting from the next keyframe", "next-keyframe"},
+{GST_SYNC_METHOD_LATEST_KEYFRAME,
+"Serve everything since the latest keyframe (burst)",
+"latest-keyframe"},
+{GST_SYNC_METHOD_BURST, "Serve burst-value data to client", "burst"},
+{GST_SYNC_METHOD_BURST_KEYFRAME,
+"Serve burst-value data starting on a keyframe",
+"burst-keyframe"},
+{GST_SYNC_METHOD_BURST_WITH_KEYFRAME,
+"Serve burst-value data preferably starting on a keyframe",
+"burst-with-keyframe"},
+{0, NULL, NULL},
+};
+if (!sync_method_type) {
+sync_method_type = g_enum_register_static ("GstSyncMethod", sync_method);
+}
+return sync_method_type;
+}
+#define GST_TYPE_UNIT_TYPE (gst_unit_type_get_type())
+static GType
+gst_unit_type_get_type (void)
+{
+static GType unit_type_type = 0;
+static const GEnumValue unit_type[] = {
+{GST_UNIT_TYPE_UNDEFINED, "Undefined", "undefined"},
+{GST_UNIT_TYPE_BUFFERS, "Buffers", "buffers"},
+{GST_UNIT_TYPE_BYTES, "Bytes", "bytes"},
+{GST_UNIT_TYPE_TIME, "Time", "time"},
+{0, NULL, NULL},
+};
+if (!unit_type_type) {
+unit_type_type = g_enum_register_static ("GstTCPUnitType", unit_type);
+}
+return unit_type_type;
+}
+#define GST_TYPE_CLIENT_STATUS (gst_client_status_get_type())
+static GType
+gst_client_status_get_type (void)
+{
+static GType client_status_type = 0;
+static const GEnumValue client_status[] = {
+{GST_CLIENT_STATUS_OK, "ok", "ok"},
+{GST_CLIENT_STATUS_CLOSED, "Closed", "closed"},
+{GST_CLIENT_STATUS_REMOVED, "Removed", "removed"},
+{GST_CLIENT_STATUS_SLOW, "Too slow", "slow"},
+{GST_CLIENT_STATUS_ERROR, "Error", "error"},
+{GST_CLIENT_STATUS_DUPLICATE, "Duplicate", "duplicate"},
+{GST_CLIENT_STATUS_FLUSHING, "Flushing", "flushing"},
+{0, NULL, NULL},
+};
+if (!client_status_type) {
+client_status_type =
+g_enum_register_static ("GstClientStatus", client_status);
+}
+return client_status_type;
+}
+static void gst_multi_fd_sink_finalize (GObject * object);
+static void gst_multi_fd_sink_remove_client_link (GstMultiFdSink * sink,
+GList * link);
+static GstFlowReturn gst_multi_fd_sink_render (GstBaseSink * bsink,
+GstBuffer * buf);
+static GstStateChangeReturn gst_multi_fd_sink_change_state (GstElement *
+element, GstStateChange transition);
+static void gst_multi_fd_sink_set_property (GObject * object, guint prop_id,
+const GValue * value, GParamSpec * pspec);
+static void gst_multi_fd_sink_get_property (GObject * object, guint prop_id,
+GValue * value, GParamSpec * pspec);
+GST_BOILERPLATE (GstMultiFdSink, gst_multi_fd_sink, GstBaseSink,
+GST_TYPE_BASE_SINK);
+static guint gst_multi_fd_sink_signals[LAST_SIGNAL] = { 0 };
+static void
+gst_multi_fd_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 (element_class, &gst_multi_fd_sink_details);
+}
+static void
+gst_multi_fd_sink_class_init (GstMultiFdSinkClass * klass)
+{
+GObjectClass *gobject_class;
+GstElementClass *gstelement_class;
+GstBaseSinkClass *gstbasesink_class;
+gobject_class = (GObjectClass *) klass;
+gstelement_class = (GstElementClass *) klass;
+gstbasesink_class = (GstBaseSinkClass *) klass;
+gobject_class->set_property = gst_multi_fd_sink_set_property;
+gobject_class->get_property = gst_multi_fd_sink_get_property;
+gobject_class->finalize = gst_multi_fd_sink_finalize;
+g_object_class_install_property (gobject_class, PROP_PROTOCOL,
+g_param_spec_enum ("protocol", "Protocol", "The protocol to wrap data in",
+GST_TYPE_TCP_PROTOCOL, DEFAULT_PROTOCOL, G_PARAM_READWRITE));
+/**
+* GstMultiFdSink::mode
+*
+* The mode for selecting activity on the fds.
+*
+* This property is deprecated since 0.10.18, if will now automatically
+* select and use the most optimal method.
+*/
+g_object_class_install_property (gobject_class, PROP_MODE,
+g_param_spec_enum ("mode", "Mode",
+"The mode for selecting activity on the fds (deprecated)",
+GST_TYPE_FDSET_MODE, DEFAULT_MODE, G_PARAM_READWRITE));
+g_object_class_install_property (gobject_class, PROP_BUFFERS_MAX,
+g_param_spec_int ("buffers-max", "Buffers max",
+"max number of buffers to queue for a client (-1 = no limit)", -1,
+G_MAXINT, DEFAULT_BUFFERS_MAX, G_PARAM_READWRITE));
+g_object_class_install_property (gobject_class,
+PROP_BUFFERS_SOFT_MAX, g_param_spec_int ("buffers-soft-max",
+"Buffers soft max",
+"Recover client when going over this limit (-1 = no limit)", -1,
+G_MAXINT, DEFAULT_BUFFERS_SOFT_MAX, G_PARAM_READWRITE));
+g_object_class_install_property (gobject_class, PROP_BYTES_MIN,
+g_param_spec_int ("bytes-min", "Bytes min",
+"min number of bytes to queue (-1 = as little as possible)", -1,
+G_MAXINT, DEFAULT_BYTES_MIN, G_PARAM_READWRITE));
+g_object_class_install_property (gobject_class, PROP_TIME_MIN,
+g_param_spec_int64 ("time-min", "Time min",
+"min number of time to queue (-1 = as little as possible)", -1,
+G_MAXINT64, DEFAULT_TIME_MIN, G_PARAM_READWRITE));
+g_object_class_install_property (gobject_class, PROP_BUFFERS_MIN,
+g_param_spec_int ("buffers-min", "Buffers min",
+"min number of buffers to queue (-1 = as few as possible)", -1,
+G_MAXINT, DEFAULT_BUFFERS_MIN, G_PARAM_READWRITE));
+g_object_class_install_property (gobject_class, PROP_UNIT_TYPE,
+g_param_spec_enum ("unit-type", "Units type",
+"The unit to measure the max/soft-max/queued properties",
+GST_TYPE_UNIT_TYPE, DEFAULT_UNIT_TYPE, G_PARAM_READWRITE));
+g_object_class_install_property (gobject_class, PROP_UNITS_MAX,
+g_param_spec_int64 ("units-max", "Units max",
+"max number of units to queue (-1 = no limit)", -1, G_MAXINT64,
+DEFAULT_UNITS_MAX, G_PARAM_READWRITE));
+g_object_class_install_property (gobject_class, PROP_UNITS_SOFT_MAX,
+g_param_spec_int64 ("units-soft-max", "Units soft max",
+"Recover client when going over this limit (-1 = no limit)", -1,
+G_MAXINT64, DEFAULT_UNITS_SOFT_MAX, G_PARAM_READWRITE));
+g_object_class_install_property (gobject_class, PROP_BUFFERS_QUEUED,
+g_param_spec_uint ("buffers-queued", "Buffers queued",
+"Number of buffers currently queued", 0, G_MAXUINT, 0,
+G_PARAM_READABLE));
+#if NOT_IMPLEMENTED
+g_object_class_install_property (gobject_class, PROP_BYTES_QUEUED,
+g_param_spec_uint ("bytes-queued", "Bytes queued",
+"Number of bytes currently queued", 0, G_MAXUINT, 0,
+G_PARAM_READABLE));
+g_object_class_install_property (gobject_class, PROP_TIME_QUEUED,
+g_param_spec_uint64 ("time-queued", "Time queued",
+"Number of time currently queued", 0, G_MAXUINT64, 0,
+G_PARAM_READABLE));
+#endif
+g_object_class_install_property (gobject_class, PROP_RECOVER_POLICY,
+g_param_spec_enum ("recover-policy", "Recover Policy",
+"How to recover when client reaches the soft max",
+GST_TYPE_RECOVER_POLICY, DEFAULT_RECOVER_POLICY, G_PARAM_READWRITE));
+g_object_class_install_property (gobject_class, PROP_TIMEOUT,
+g_param_spec_uint64 ("timeout", "Timeout",
+"Maximum inactivity timeout in nanoseconds for a client (0 = no limit)",
+0, G_MAXUINT64, DEFAULT_TIMEOUT, G_PARAM_READWRITE));
+g_object_class_install_property (gobject_class, PROP_SYNC_METHOD,
+g_param_spec_enum ("sync-method", "Sync Method",
+"How to sync new clients to the stream",
+GST_TYPE_SYNC_METHOD, DEFAULT_SYNC_METHOD, G_PARAM_READWRITE));
+g_object_class_install_property (gobject_class, PROP_BYTES_TO_SERVE,
+g_param_spec_uint64 ("bytes-to-serve", "Bytes to serve",
+"Number of bytes received to serve to clients", 0, G_MAXUINT64, 0,
+G_PARAM_READABLE));
+g_object_class_install_property (gobject_class, PROP_BYTES_SERVED,
+g_param_spec_uint64 ("bytes-served", "Bytes served",
+"Total number of bytes send to all clients", 0, G_MAXUINT64, 0,
+G_PARAM_READABLE));
+g_object_class_install_property (gobject_class, PROP_BURST_UNIT,
+g_param_spec_enum ("burst-unit", "Burst unit",
+"The format of the burst units (when sync-method is burst[[-with]-keyframe])",
+GST_TYPE_UNIT_TYPE, DEFAULT_BURST_UNIT, G_PARAM_READWRITE));
+g_object_class_install_property (gobject_class, PROP_BURST_VALUE,
+g_param_spec_uint64 ("burst-value", "Burst value",
+"The amount of burst expressed in burst-unit",
+0, G_MAXUINT64, DEFAULT_BURST_VALUE, G_PARAM_READWRITE));
+/**
+* GstMultiFdSink::add:
+* @gstmultifdsink: the multifdsink element to emit this signal on
+* @fd:             the file descriptor to add to multifdsink
+*
+* Hand the given open file descriptor to multifdsink to write to.
+*/
+gst_multi_fd_sink_signals[SIGNAL_ADD] =
+g_signal_new ("add", G_TYPE_FROM_CLASS (klass),
+G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION, G_STRUCT_OFFSET (GstMultiFdSinkClass,
+add), NULL, NULL, g_cclosure_marshal_VOID__INT, G_TYPE_NONE, 1,
+G_TYPE_INT);
+/**
+* GstMultiFdSink::add-full:
+* @gstmultifdsink: the multifdsink element to emit this signal on
+* @fd:             the file descriptor to add to multifdsink
+* @keyframe:       start bursting from a keyframe
+* @unit_type_min:  the unit-type of @value_min
+* @value_min:      the minimum amount of data to burst expressed in
+*                  @unit_type_min units.
+* @unit_type_max:  the unit-type of @value_max
+* @value_max:      the maximum amount of data to burst expressed in
+*                  @unit_type_max units.
+*
+* Hand the given open file descriptor to multifdsink to write to and
+* specify the burst parameters for the new connection.
+*/
+gst_multi_fd_sink_signals[SIGNAL_ADD_BURST] =
+g_signal_new ("add-full", G_TYPE_FROM_CLASS (klass),
+G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION, G_STRUCT_OFFSET (GstMultiFdSinkClass,
+add_full), NULL, NULL,
+gst_tcp_marshal_VOID__INT_BOOLEAN_INT_UINT64_INT_UINT64, G_TYPE_NONE, 6,
+G_TYPE_INT, G_TYPE_BOOLEAN, GST_TYPE_UNIT_TYPE, G_TYPE_UINT64,
+GST_TYPE_UNIT_TYPE, G_TYPE_UINT64);
+/**
+* GstMultiFdSink::remove:
+* @gstmultifdsink: the multifdsink element to emit this signal on
+* @fd:             the file descriptor to remove from multifdsink
+*
+* Remove the given open file descriptor from multifdsink.
+*/
+gst_multi_fd_sink_signals[SIGNAL_REMOVE] =
+g_signal_new ("remove", G_TYPE_FROM_CLASS (klass),
+G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION, G_STRUCT_OFFSET (GstMultiFdSinkClass,
+remove), NULL, NULL, gst_tcp_marshal_VOID__INT, G_TYPE_NONE, 1,
+G_TYPE_INT);
+/**
+* GstMultiFdSink::remove_flush:
+* @gstmultifdsink: the multifdsink element to emit this signal on
+* @fd:             the file descriptor to remove from multifdsink
+*
+* Remove the given open file descriptor from multifdsink after flushing all
+* the pending data to the fd.
+*/
+gst_multi_fd_sink_signals[SIGNAL_REMOVE_FLUSH] =
+g_signal_new ("remove-flush", G_TYPE_FROM_CLASS (klass),
+G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION, G_STRUCT_OFFSET (GstMultiFdSinkClass,
+remove_flush), NULL, NULL, gst_tcp_marshal_VOID__INT, G_TYPE_NONE, 1,
+G_TYPE_INT);
+/**
+* GstMultiFdSink::clear:
+* @gstmultifdsink: the multifdsink element to emit this signal on
+*
+* Remove all file descriptors from multifdsink.  Since multifdsink did not
+* open fd's itself, it does not explicitly close the fd.  The application
+* should do so by connecting to the client-fd-removed callback.
+*/
+gst_multi_fd_sink_signals[SIGNAL_CLEAR] =
+g_signal_new ("clear", G_TYPE_FROM_CLASS (klass),
+G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION, G_STRUCT_OFFSET (GstMultiFdSinkClass,
+clear), NULL, NULL, g_cclosure_marshal_VOID__VOID, G_TYPE_NONE, 0);
+/**
+* GstMultiFdSink::get-stats:
+* @gstmultifdsink: the multifdsink element to emit this signal on
+* @fd:             the file descriptor to get stats of from multifdsink
+*
+* Get statistics about @fd. This function returns a GValueArray to ease
+* automatic wrapping for bindings.
+*
+* Returns: a GValueArray with the statistics. The array contains guint64
+*     values that represent respectively: total number of bytes sent, time
+*     when the client was added, time when the client was
+*     disconnected/removed, time the client is/was active, last activity
+*     time (in epoch seconds), number of buffers dropped.
+*     All times are expressed in nanoseconds (GstClockTime).
+*     The array can be 0-length if the client was not found.
+*/
+gst_multi_fd_sink_signals[SIGNAL_GET_STATS] =
+g_signal_new ("get-stats", G_TYPE_FROM_CLASS (klass),
+G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION, G_STRUCT_OFFSET (GstMultiFdSinkClass,
+get_stats), NULL, NULL, gst_tcp_marshal_BOXED__INT,
+G_TYPE_VALUE_ARRAY, 1, G_TYPE_INT);
+/**
+* GstMultiFdSink::client-added:
+* @gstmultifdsink: the multifdsink element that emitted this signal
+* @fd:             the file descriptor that was added to multifdsink
+*
+* The given file descriptor was added to multifdsink. This signal will
+* be emitted from the streaming thread so application should be prepared
+* for that.
+*/
+gst_multi_fd_sink_signals[SIGNAL_CLIENT_ADDED] =
+g_signal_new ("client-added", G_TYPE_FROM_CLASS (klass),
+G_SIGNAL_RUN_LAST, G_STRUCT_OFFSET (GstMultiFdSinkClass, client_added),
+NULL, NULL, gst_tcp_marshal_VOID__INT, G_TYPE_NONE, 1, G_TYPE_INT);
+/**
+* GstMultiFdSink::client-removed:
+* @gstmultifdsink: the multifdsink element that emitted this signal
+* @fd:             the file descriptor that is to be removed from multifdsink
+* @status:         the reason why the client was removed
+*
+* The given file descriptor is about to be removed from multifdsink. This
+* signal will be emitted from the streaming thread so applications should
+* be prepared for that.
+*
+* @gstmultifdsink still holds a handle to @fd so it is possible to call
+* the get-stats signal from this callback. For the same reason it is
+* not safe to close() and reuse @fd in this callback.
+*/
+gst_multi_fd_sink_signals[SIGNAL_CLIENT_REMOVED] =
+g_signal_new ("client-removed", G_TYPE_FROM_CLASS (klass),
+G_SIGNAL_RUN_LAST, G_STRUCT_OFFSET (GstMultiFdSinkClass,
+client_removed), NULL, NULL, gst_tcp_marshal_VOID__INT_BOXED,
+G_TYPE_NONE, 2, G_TYPE_INT, GST_TYPE_CLIENT_STATUS);
+/**
+* GstMultiFdSink::client-fd-removed:
+* @gstmultifdsink: the multifdsink element that emitted this signal
+* @fd:             the file descriptor that was removed from multifdsink
+*
+* The given file descriptor was removed from multifdsink. This signal will
+* be emitted from the streaming thread so applications should be prepared
+* for that.
+*
+* In this callback, @gstmultifdsink has removed all the information
+* associated with @fd and it is therefore not possible to call get-stats
+* with @fd. It is however safe to close() and reuse @fd in the callback.
+*
+* Since: 0.10.7
+*/
+gst_multi_fd_sink_signals[SIGNAL_CLIENT_FD_REMOVED] =
+g_signal_new ("client-fd-removed", G_TYPE_FROM_CLASS (klass),
+G_SIGNAL_RUN_LAST, G_STRUCT_OFFSET (GstMultiFdSinkClass,
+client_fd_removed), NULL, NULL, gst_tcp_marshal_VOID__INT,
+G_TYPE_NONE, 1, G_TYPE_INT);
+gstelement_class->change_state =
+GST_DEBUG_FUNCPTR (gst_multi_fd_sink_change_state);
+gstbasesink_class->render = GST_DEBUG_FUNCPTR (gst_multi_fd_sink_render);
+klass->add = GST_DEBUG_FUNCPTR (gst_multi_fd_sink_add);
+klass->add_full = GST_DEBUG_FUNCPTR (gst_multi_fd_sink_add_full);
+klass->remove = GST_DEBUG_FUNCPTR (gst_multi_fd_sink_remove);
+klass->remove_flush = GST_DEBUG_FUNCPTR (gst_multi_fd_sink_remove_flush);
+klass->clear = GST_DEBUG_FUNCPTR (gst_multi_fd_sink_clear);
+klass->get_stats = GST_DEBUG_FUNCPTR (gst_multi_fd_sink_get_stats);
+GST_DEBUG_CATEGORY_INIT (multifdsink_debug, "multifdsink", 0, "FD sink");
+}
+static void
+gst_multi_fd_sink_init (GstMultiFdSink * this, GstMultiFdSinkClass * klass)
+{
+GST_OBJECT_FLAG_UNSET (this, GST_MULTI_FD_SINK_OPEN);
+this->protocol = DEFAULT_PROTOCOL;
+this->mode = DEFAULT_MODE;
+CLIENTS_LOCK_INIT (this);
+this->clients = NULL;
+this->fd_hash = g_hash_table_new (g_int_hash, g_int_equal);
+this->bufqueue = g_array_new (FALSE, TRUE, sizeof (GstBuffer *));
+this->unit_type = DEFAULT_UNIT_TYPE;
+this->units_max = DEFAULT_UNITS_MAX;
+this->units_soft_max = DEFAULT_UNITS_SOFT_MAX;
+this->time_min = DEFAULT_TIME_MIN;
+this->bytes_min = DEFAULT_BYTES_MIN;
+this->buffers_min = DEFAULT_BUFFERS_MIN;
+this->recover_policy = DEFAULT_RECOVER_POLICY;
+this->timeout = DEFAULT_TIMEOUT;
+this->def_sync_method = DEFAULT_SYNC_METHOD;
+this->def_burst_unit = DEFAULT_BURST_UNIT;
+this->def_burst_value = DEFAULT_BURST_VALUE;
+this->header_flags = 0;
+}
+static void
+gst_multi_fd_sink_finalize (GObject * object)
+{
+GstMultiFdSink *this;
+this = GST_MULTI_FD_SINK (object);
+CLIENTS_LOCK_FREE (this);
+g_hash_table_destroy (this->fd_hash);
+g_array_free (this->bufqueue, TRUE);
+G_OBJECT_CLASS (parent_class)->finalize (object);
+}
+/* "add-full" signal implementation */
+#ifdef __SYMBIAN32__
+EXPORT_C
+#endif
+void
+gst_multi_fd_sink_add_full (GstMultiFdSink * sink, int fd,
+GstSyncMethod sync_method, GstUnitType min_unit, guint64 min_value,
+GstUnitType max_unit, guint64 max_value)
+{
+GstTCPClient *client;
+GList *clink;
+GTimeVal now;
+gint flags, res;
+struct stat statbuf;
+GST_DEBUG_OBJECT (sink, "[fd %5d] adding client, sync_method %d, "
+"min_unit %d, min_value %" G_GUINT64_FORMAT
+", max_unit %d, max_value %" G_GUINT64_FORMAT, fd, sync_method,
+min_unit, min_value, max_unit, max_value);
+/* do limits check if we can */
+if (min_unit == max_unit) {
+if (max_value != -1 && min_value != -1 && max_value < min_value)
+goto wrong_limits;
+}
+/* create client datastructure */
+client = g_new0 (GstTCPClient, 1);
+client->fd.fd = fd;
+client->status = GST_CLIENT_STATUS_OK;
+client->bufpos = -1;
+client->flushcount = -1;
+client->bufoffset = 0;
+client->sending = NULL;
+client->bytes_sent = 0;
+client->dropped_buffers = 0;
+client->avg_queue_size = 0;
+client->new_connection = TRUE;
+client->burst_min_unit = min_unit;
+client->burst_min_value = min_value;
+client->burst_max_unit = max_unit;
+client->burst_max_value = max_value;
+client->sync_method = sync_method;
+client->currently_removing = FALSE;
+/* update start time */
+g_get_current_time (&now);
+client->connect_time = GST_TIMEVAL_TO_TIME (now);
+client->disconnect_time = 0;
+/* set last activity time to connect time */
+client->last_activity_time = client->connect_time;
+CLIENTS_LOCK (sink);
+/* check the hash to find a duplicate fd */
+clink = g_hash_table_lookup (sink->fd_hash, &client->fd.fd);
+if (clink != NULL)
+goto duplicate;
+/* we can add the fd now */
+clink = sink->clients = g_list_prepend (sink->clients, client);
+g_hash_table_insert (sink->fd_hash, &client->fd.fd, clink);
+sink->clients_cookie++;
+/* set the socket to non blocking */
+//temporary commented for multifdsink issue
+//res = fcntl (fd, F_SETFL, O_NONBLOCK);  //Arun
+/* we always read from a client */
+gst_poll_add_fd (sink->fdset, &client->fd);
+/* we don't try to read from write only fds */
+flags = fcntl (fd, F_GETFL, 0);
+if ((flags & O_ACCMODE) != O_WRONLY) {
+gst_poll_fd_ctl_read (sink->fdset, &client->fd, TRUE);
+}
+/* figure out the mode, can't use send() for non sockets */
+res = fstat (fd, &statbuf);
+if (S_ISSOCK (statbuf.st_mode)) {
+client->is_socket = TRUE;
+}
+gst_poll_restart (sink->fdset);
+CLIENTS_UNLOCK (sink);
+g_signal_emit (G_OBJECT (sink),
+gst_multi_fd_sink_signals[SIGNAL_CLIENT_ADDED], 0, fd);
+return;
+/* errors */
+wrong_limits:
+{
+GST_WARNING_OBJECT (sink,
+"[fd %5d] wrong values min =%" G_GUINT64_FORMAT ", max=%"
+G_GUINT64_FORMAT ", unit %d specified when adding client", fd,
+min_value, max_value, min_unit);
+return;
+}
+duplicate:
+{
+client->status = GST_CLIENT_STATUS_DUPLICATE;
+CLIENTS_UNLOCK (sink);
+GST_WARNING_OBJECT (sink, "[fd %5d] duplicate client found, refusing", fd);
+g_signal_emit (G_OBJECT (sink),
+gst_multi_fd_sink_signals[SIGNAL_CLIENT_REMOVED], 0, fd,
+client->status);
+g_free (client);
+return;
+}
+}
+/* "add" signal implemntation */
+#ifdef __SYMBIAN32__
+EXPORT_C
+#endif
+void
+gst_multi_fd_sink_add (GstMultiFdSink * sink, int fd)
+{
+gst_multi_fd_sink_add_full (sink, fd, sink->def_sync_method,
+sink->def_burst_unit, sink->def_burst_value, sink->def_burst_unit, -1);
+}
+/* "remove" signal implementation */
+#ifdef __SYMBIAN32__
+EXPORT_C
+#endif
+void
+gst_multi_fd_sink_remove (GstMultiFdSink * sink, int fd)
+{
+GList *clink;
+GST_DEBUG_OBJECT (sink, "[fd %5d] removing client", fd);
+CLIENTS_LOCK (sink);
+clink = g_hash_table_lookup (sink->fd_hash, &fd);
+if (clink != NULL) {
+GstTCPClient *client = (GstTCPClient *) clink->data;
+if (client->status != GST_CLIENT_STATUS_OK) {
+GST_INFO_OBJECT (sink,
+"[fd %5d] Client already disconnecting with status %d",
+fd, client->status);
+goto done;
+}
+client->status = GST_CLIENT_STATUS_REMOVED;
+gst_multi_fd_sink_remove_client_link (sink, clink);
+gst_poll_restart (sink->fdset);
+} else {
+GST_WARNING_OBJECT (sink, "[fd %5d] no client with this fd found!", fd);
+}
+done:
+CLIENTS_UNLOCK (sink);
+}
+/* "remove-flush" signal implementation */
+#ifdef __SYMBIAN32__
+EXPORT_C
+#endif
+void
+gst_multi_fd_sink_remove_flush (GstMultiFdSink * sink, int fd)
+{
+GList *clink;
+GST_DEBUG_OBJECT (sink, "[fd %5d] flushing client", fd);
+CLIENTS_LOCK (sink);
+clink = g_hash_table_lookup (sink->fd_hash, &fd);
+if (clink != NULL) {
+GstTCPClient *client = (GstTCPClient *) clink->data;
+if (client->status != GST_CLIENT_STATUS_OK) {
+GST_INFO_OBJECT (sink,
+"[fd %5d] Client already disconnecting with status %d",
+fd, client->status);
+goto done;
+}
+/* take the position of the client as the number of buffers left to flush.
+* If the client was at position -1, we flush 0 buffers, 0 == flush 1
+* buffer, etc... */
+client->flushcount = client->bufpos + 1;
+/* mark client as flushing. We can not remove the client right away because
+* it might have some buffers to flush in the ->sending queue. */
+client->status = GST_CLIENT_STATUS_FLUSHING;
+} else {
+GST_WARNING_OBJECT (sink, "[fd %5d] no client with this fd found!", fd);
+}
+done:
+CLIENTS_UNLOCK (sink);
+}
+/* can be called both through the signal (i.e. from any thread) or when
+* stopping, after the writing thread has shut down */
+#ifdef __SYMBIAN32__
+EXPORT_C
+#endif
+void
+gst_multi_fd_sink_clear (GstMultiFdSink * sink)
+{
+GList *clients, *next;
+guint32 cookie;
+GST_DEBUG_OBJECT (sink, "clearing all clients");
+CLIENTS_LOCK (sink);
+restart:
+cookie = sink->clients_cookie;
+for (clients = sink->clients; clients; clients = next) {
+GstTCPClient *client;
+if (cookie != sink->clients_cookie) {
+GST_DEBUG_OBJECT (sink, "cookie changed while removing all clients");
+goto restart;
+}
+client = (GstTCPClient *) clients->data;
+next = g_list_next (clients);
+client->status = GST_CLIENT_STATUS_REMOVED;
+gst_multi_fd_sink_remove_client_link (sink, clients);
+}
+gst_poll_restart (sink->fdset);
+CLIENTS_UNLOCK (sink);
+}
+/* "get-stats" signal implementation
+* the array returned contains:
+*
+* guint64 : bytes_sent
+* guint64 : connect time (in nanoseconds, since Epoch)
+* guint64 : disconnect time (in nanoseconds, since Epoch)
+* guint64 : time the client is/was connected (in nanoseconds)
+* guint64 : last activity time (in nanoseconds, since Epoch)
+* guint64 : buffers dropped due to recovery
+*/
+#ifdef __SYMBIAN32__
+EXPORT_C
+#endif
+GValueArray *
+gst_multi_fd_sink_get_stats (GstMultiFdSink * sink, int fd)
+{
+GstTCPClient *client;
+GValueArray *result = NULL;
+GList *clink;
+CLIENTS_LOCK (sink);
+clink = g_hash_table_lookup (sink->fd_hash, &fd);
+if (clink == NULL)
+goto noclient;
+client = (GstTCPClient *) clink->data;
+if (client != NULL) {
+GValue value = { 0 };
+guint64 interval;
+result = g_value_array_new (5);
+g_value_init (&value, G_TYPE_UINT64);
+g_value_set_uint64 (&value, client->bytes_sent);
+result = g_value_array_append (result, &value);
+g_value_unset (&value);
+g_value_init (&value, G_TYPE_UINT64);
+g_value_set_uint64 (&value, client->connect_time);
+result = g_value_array_append (result, &value);
+g_value_unset (&value);
+if (client->disconnect_time == 0) {
+GTimeVal nowtv;
+g_get_current_time (&nowtv);
+interval = GST_TIMEVAL_TO_TIME (nowtv) - client->connect_time;
+} else {
+interval = client->disconnect_time - client->connect_time;
+}
+g_value_init (&value, G_TYPE_UINT64);
+g_value_set_uint64 (&value, client->disconnect_time);
+result = g_value_array_append (result, &value);
+g_value_unset (&value);
+g_value_init (&value, G_TYPE_UINT64);
+g_value_set_uint64 (&value, interval);
+result = g_value_array_append (result, &value);
+g_value_unset (&value);
+g_value_init (&value, G_TYPE_UINT64);
+g_value_set_uint64 (&value, client->last_activity_time);
+result = g_value_array_append (result, &value);
+g_value_unset (&value);
+g_value_init (&value, G_TYPE_UINT64);
+g_value_set_uint64 (&value, client->dropped_buffers);
+result = g_value_array_append (result, &value);
+}
+noclient:
+CLIENTS_UNLOCK (sink);
+/* python doesn't like a NULL pointer yet */
+if (result == NULL) {
+GST_WARNING_OBJECT (sink, "[fd %5d] no client with this found!", fd);
+result = g_value_array_new (0);
+}
+return result;
+}
+/* should be called with the clientslock helt.
+* Note that we don't close the fd as we didn't open it in the first
+* place. An application should connect to the client-fd-removed signal and
+* close the fd itself.
+*/
+static void
+gst_multi_fd_sink_remove_client_link (GstMultiFdSink * sink, GList * link)
+{
+int fd;
+GTimeVal now;
+GstTCPClient *client = (GstTCPClient *) link->data;
+GstMultiFdSinkClass *fclass;
+fclass = GST_MULTI_FD_SINK_GET_CLASS (sink);
+fd = client->fd.fd;
+if (client->currently_removing) {
+GST_WARNING_OBJECT (sink, "[fd %5d] client is already being removed", fd);
+return;
+} else {
+client->currently_removing = TRUE;
+}
+/* FIXME: if we keep track of ip we can log it here and signal */
+switch (client->status) {
+case GST_CLIENT_STATUS_OK:
+GST_WARNING_OBJECT (sink, "[fd %5d] removing client %p for no reason",
+fd, client);
+break;
+case GST_CLIENT_STATUS_CLOSED:
+GST_DEBUG_OBJECT (sink, "[fd %5d] removing client %p because of close",
+fd, client);
+break;
+case GST_CLIENT_STATUS_REMOVED:
+GST_DEBUG_OBJECT (sink,
+"[fd %5d] removing client %p because the app removed it", fd, client);
+break;
+case GST_CLIENT_STATUS_SLOW:
+GST_INFO_OBJECT (sink,
+"[fd %5d] removing client %p because it was too slow", fd, client);
+break;
+case GST_CLIENT_STATUS_ERROR:
+GST_WARNING_OBJECT (sink,
+"[fd %5d] removing client %p because of error", fd, client);
+break;
+case GST_CLIENT_STATUS_FLUSHING:
+default:
+GST_WARNING_OBJECT (sink,
+"[fd %5d] removing client %p with invalid reason %d", fd, client,
+client->status);
+break;
+}
+gst_poll_remove_fd (sink->fdset, &client->fd);
+g_get_current_time (&now);
+client->disconnect_time = GST_TIMEVAL_TO_TIME (now);
+/* free client buffers */
+g_slist_foreach (client->sending, (GFunc) gst_mini_object_unref, NULL);
+g_slist_free (client->sending);
+client->sending = NULL;
+if (client->caps)
+gst_caps_unref (client->caps);
+client->caps = NULL;
+/* unlock the mutex before signaling because the signal handler
+* might query some properties */
+CLIENTS_UNLOCK (sink);
+g_signal_emit (G_OBJECT (sink),
+gst_multi_fd_sink_signals[SIGNAL_CLIENT_REMOVED], 0, fd, client->status);
+/* lock again before we remove the client completely */
+CLIENTS_LOCK (sink);
+/* fd cannot be reused in the above signal callback so we can safely
+* remove it from the hashtable here */
+if (!g_hash_table_remove (sink->fd_hash, &client->fd.fd)) {
+GST_WARNING_OBJECT (sink,
+"[fd %5d] error removing client %p from hash", client->fd.fd, client);
+}
+/* after releasing the lock above, the link could be invalid, more
+* precisely, the next and prev pointers could point to invalid list
+* links. One optimisation could be to add a cookie to the linked list
+* and take a shortcut when it did not change between unlocking and locking
+* our mutex. For now we just walk the list again. */
+sink->clients = g_list_remove (sink->clients, client);
+sink->clients_cookie++;
+if (fclass->removed)
+fclass->removed (sink, client->fd.fd);
+g_free (client);
+CLIENTS_UNLOCK (sink);
+/* and the fd is really gone now */
+g_signal_emit (G_OBJECT (sink),
+gst_multi_fd_sink_signals[SIGNAL_CLIENT_FD_REMOVED], 0, fd);
+CLIENTS_LOCK (sink);
+}
+/* handle a read on a client fd,
+* which either indicates a close or should be ignored
+* returns FALSE if some error occured or the client closed. */
+static gboolean
+gst_multi_fd_sink_handle_client_read (GstMultiFdSink * sink,
+GstTCPClient * client)
+{
+int avail, fd;
+gboolean ret;
+fd = client->fd.fd;
+if (ioctl (fd, FIONREAD, &avail) < 0)
+goto ioctl_failed;
+GST_DEBUG_OBJECT (sink, "[fd %5d] select reports client read of %d bytes",
+fd, avail);
+ret = TRUE;
+if (avail == 0) {
+/* client sent close, so remove it */
+GST_DEBUG_OBJECT (sink, "[fd %5d] client asked for close, removing", fd);
+client->status = GST_CLIENT_STATUS_CLOSED;
+ret = FALSE;
+} else if (avail < 0) {
+GST_WARNING_OBJECT (sink, "[fd %5d] avail < 0, removing", fd);
+client->status = GST_CLIENT_STATUS_ERROR;
+ret = FALSE;
+} else {
+guint8 dummy[512];
+gint nread;
+/* just Read 'n' Drop, could also just drop the client as it's not supposed
+* to write to us except for closing the socket, I guess it's because we
+* like to listen to our customers. */
+do {
+/* this is the maximum we can read */
+gint to_read = MIN (avail, 512);
+GST_DEBUG_OBJECT (sink, "[fd %5d] client wants us to read %d bytes",
+fd, to_read);
+nread = read (fd, dummy, to_read);
+if (nread < -1) {
+GST_WARNING_OBJECT (sink, "[fd %5d] could not read %d bytes: %s (%d)",
+fd, to_read, g_strerror (errno), errno);
+client->status = GST_CLIENT_STATUS_ERROR;
+ret = FALSE;
+break;
+} else if (nread == 0) {
+GST_WARNING_OBJECT (sink, "[fd %5d] 0 bytes in read, removing", fd);
+client->status = GST_CLIENT_STATUS_ERROR;
+ret = FALSE;
+break;
+}
+avail -= nread;
+}
+while (avail > 0);
+}
+return ret;
+/* ERRORS */
+ioctl_failed:
+{
+GST_WARNING_OBJECT (sink, "[fd %5d] ioctl failed: %s (%d)",
+fd, g_strerror (errno), errno);
+client->status = GST_CLIENT_STATUS_ERROR;
+return FALSE;
+}
+}
+/* Queue raw data for this client, creating a new buffer.
+* This takes ownership of the data by
+* setting it as GST_BUFFER_MALLOCDATA() on the created buffer so
+* be sure to pass g_free()-able @data.
+*/
+static gboolean
+gst_multi_fd_sink_client_queue_data (GstMultiFdSink * sink,
+GstTCPClient * client, gchar * data, gint len)
+{
+GstBuffer *buf;
+buf = gst_buffer_new ();
+GST_BUFFER_DATA (buf) = (guint8 *) data;
+GST_BUFFER_MALLOCDATA (buf) = (guint8 *) data;
+GST_BUFFER_SIZE (buf) = len;
+GST_LOG_OBJECT (sink, "[fd %5d] queueing data of length %d",
+client->fd.fd, len);
+client->sending = g_slist_append (client->sending, buf);
+return TRUE;
+}
+/* GDP-encode given caps and queue them for sending */
+static gboolean
+gst_multi_fd_sink_client_queue_caps (GstMultiFdSink * sink,
+GstTCPClient * client, const GstCaps * caps)
+{
+guint8 *header;
+guint8 *payload;
+guint length;
+gchar *string;
+g_return_val_if_fail (caps != NULL, FALSE);
+string = gst_caps_to_string (caps);
+GST_DEBUG_OBJECT (sink, "[fd %5d] Queueing caps %s through GDP",
+client->fd.fd, string);
+g_free (string);
+if (!gst_dp_packet_from_caps (caps, sink->header_flags, &length, &header,
+&payload)) {
+GST_DEBUG_OBJECT (sink, "Could not create GDP packet from caps");
+return FALSE;
+}
+gst_multi_fd_sink_client_queue_data (sink, client, (gchar *) header, length);
+length = gst_dp_header_payload_length (header);
+gst_multi_fd_sink_client_queue_data (sink, client, (gchar *) payload, length);
+return TRUE;
+}
+static gboolean
+is_sync_frame (GstMultiFdSink * sink, GstBuffer * buffer)
+{
+if (GST_BUFFER_FLAG_IS_SET (buffer, GST_BUFFER_FLAG_DELTA_UNIT)) {
+return FALSE;
+} else if (!GST_BUFFER_FLAG_IS_SET (buffer, GST_BUFFER_FLAG_IN_CAPS)) {
+return TRUE;
+}
+return FALSE;
+}
+/* queue the given buffer for the given client, possibly adding the GDP
+* header if GDP is being used */
+static gboolean
+gst_multi_fd_sink_client_queue_buffer (GstMultiFdSink * sink,
+GstTCPClient * client, GstBuffer * buffer)
+{
+GstCaps *caps;
+/* TRUE: send them if the new caps have them */
+gboolean send_streamheader = FALSE;
+GstStructure *s;
+/* before we queue the buffer, we check if we need to queue streamheader
+* buffers (because it's a new client, or because they changed) */
+caps = gst_buffer_get_caps (buffer);  /* cleaned up after streamheader */
+if (!client->caps) {
+GST_DEBUG_OBJECT (sink,
+"[fd %5d] no previous caps for this client, send streamheader",
+client->fd.fd);
+send_streamheader = TRUE;
+client->caps = gst_caps_ref (caps);
+} else {
+/* there were previous caps recorded, so compare */
+if (!gst_caps_is_equal (caps, client->caps)) {
+const GValue *sh1, *sh2;
+/* caps are not equal, but could still have the same streamheader */
+s = gst_caps_get_structure (caps, 0);
+if (!gst_structure_has_field (s, "streamheader")) {
+/* no new streamheader, so nothing new to send */
+GST_DEBUG_OBJECT (sink,
+"[fd %5d] new caps do not have streamheader, not sending",
+client->fd.fd);
+} else {
+/* there is a new streamheader */
+s = gst_caps_get_structure (client->caps, 0);
+if (!gst_structure_has_field (s, "streamheader")) {
+/* no previous streamheader, so send the new one */
+GST_DEBUG_OBJECT (sink,
+"[fd %5d] previous caps did not have streamheader, sending",
+client->fd.fd);
+send_streamheader = TRUE;
+} else {
+/* both old and new caps have streamheader set */
+sh1 = gst_structure_get_value (s, "streamheader");
+s = gst_caps_get_structure (caps, 0);
+sh2 = gst_structure_get_value (s, "streamheader");
+if (gst_value_compare (sh1, sh2) != GST_VALUE_EQUAL) {
+GST_DEBUG_OBJECT (sink,
+"[fd %5d] new streamheader different from old, sending",
+client->fd.fd);
+send_streamheader = TRUE;
+}
+}
+}
+}
+/* Replace the old caps */
+gst_caps_unref (client->caps);
+client->caps = gst_caps_ref (caps);
+}
+if (G_UNLIKELY (send_streamheader)) {
+const GValue *sh;
+GArray *buffers;
+int i;
+GST_LOG_OBJECT (sink,
+"[fd %5d] sending streamheader from caps %" GST_PTR_FORMAT,
+client->fd.fd, caps);
+s = gst_caps_get_structure (caps, 0);
+if (!gst_structure_has_field (s, "streamheader")) {
+GST_DEBUG_OBJECT (sink,
+"[fd %5d] no new streamheader, so nothing to send", client->fd.fd);
+} else {
+GST_LOG_OBJECT (sink,
+"[fd %5d] sending streamheader from caps %" GST_PTR_FORMAT,
+client->fd.fd, caps);
+sh = gst_structure_get_value (s, "streamheader");
+g_assert (G_VALUE_TYPE (sh) == GST_TYPE_ARRAY);
+buffers = g_value_peek_pointer (sh);
+GST_DEBUG_OBJECT (sink, "%d streamheader buffers", buffers->len);
+for (i = 0; i < buffers->len; ++i) {
+GValue *bufval;
+GstBuffer *buffer;
+bufval = &g_array_index (buffers, GValue, i);
+g_assert (G_VALUE_TYPE (bufval) == GST_TYPE_BUFFER);
+buffer = g_value_peek_pointer (bufval);
+GST_DEBUG_OBJECT (sink,
+"[fd %5d] queueing streamheader buffer of length %d",
+client->fd.fd, GST_BUFFER_SIZE (buffer));
+gst_buffer_ref (buffer);
+if (sink->protocol == GST_TCP_PROTOCOL_GDP) {
+guint8 *header;
+guint len;
+if (!gst_dp_header_from_buffer (buffer, sink->header_flags, &len,
+&header)) {
+GST_DEBUG_OBJECT (sink,
+"[fd %5d] could not create header, removing client",
+client->fd.fd);
+return FALSE;
+}
+gst_multi_fd_sink_client_queue_data (sink, client, (gchar *) header,
+len);
+}
+client->sending = g_slist_append (client->sending, buffer);
+}
+}
+}
+gst_caps_unref (caps);
+caps = NULL;
+/* now we can send the buffer, possibly sending a GDP header first */
+if (sink->protocol == GST_TCP_PROTOCOL_GDP) {
+guint8 *header;
+guint len;
+if (!gst_dp_header_from_buffer (buffer, sink->header_flags, &len, &header)) {
+GST_DEBUG_OBJECT (sink,
+"[fd %5d] could not create header, removing client", client->fd.fd);
+return FALSE;
+}
+gst_multi_fd_sink_client_queue_data (sink, client, (gchar *) header, len);
+}
+GST_LOG_OBJECT (sink, "[fd %5d] queueing buffer of length %d",
+client->fd.fd, GST_BUFFER_SIZE (buffer));
+gst_buffer_ref (buffer);
+client->sending = g_slist_append (client->sending, buffer);
+return TRUE;
+}
+/* find the keyframe in the list of buffers starting the
+* search from @idx. @direction as -1 will search backwards,
+* 1 will search forwards.
+* Returns: the index or -1 if there is no keyframe after idx.
+*/
+static gint
+find_syncframe (GstMultiFdSink * sink, gint idx, gint direction)
+{
+gint i, len, result;
+/* take length of queued buffers */
+len = sink->bufqueue->len;
+/* assume we don't find a keyframe */
+result = -1;
+/* then loop over all buffers to find the first keyframe */
+for (i = idx; i >= 0 && i < len; i += direction) {
+GstBuffer *buf;
+buf = g_array_index (sink->bufqueue, GstBuffer *, i);
+if (is_sync_frame (sink, buf)) {
+GST_LOG_OBJECT (sink, "found keyframe at %d from %d, direction %d",
+i, idx, direction);
+result = i;
+break;
+}
+}
+return result;
+}
+#define find_next_syncframe(s,i) 	find_syncframe(s,i,1)
+#define find_prev_syncframe(s,i) 	find_syncframe(s,i,-1)
+/* Get the number of buffers from the buffer queue needed to satisfy
+* the maximum max in the configured units.
+* If units are not BUFFERS, and there are insufficient buffers in the
+* queue to satify the limit, return len(queue) + 1 */
+static gint
+get_buffers_max (GstMultiFdSink * sink, gint64 max)
+{
+switch (sink->unit_type) {
+case GST_UNIT_TYPE_BUFFERS:
+return max;
+case GST_UNIT_TYPE_TIME:
+{
+GstBuffer *buf;
+int i;
+int len;
+gint64 diff;
+GstClockTime first = GST_CLOCK_TIME_NONE;
+len = sink->bufqueue->len;
+for (i = 0; i < len; i++) {
+buf = g_array_index (sink->bufqueue, GstBuffer *, i);
+if (GST_BUFFER_TIMESTAMP_IS_VALID (buf)) {
+if (first == -1)
+first = GST_BUFFER_TIMESTAMP (buf);
+diff = first - GST_BUFFER_TIMESTAMP (buf);
+if (diff > max)
+return i + 1;
+}
+}
+return len + 1;
+}
+case GST_UNIT_TYPE_BYTES:
+{
+GstBuffer *buf;
+int i;
+int len;
+gint acc = 0;
+len = sink->bufqueue->len;
+for (i = 0; i < len; i++) {
+buf = g_array_index (sink->bufqueue, GstBuffer *, i);
+acc += GST_BUFFER_SIZE (buf);
+if (acc > max)
+return i + 1;
+}
+return len + 1;
+}
+default:
+return max;
+}
+}
+/* find the positions in the buffer queue where *_min and *_max
+* is satisfied
+*/
+/* count the amount of data in the buffers and return the index
+* that satifies the given limits.
+*
+* Returns: index @idx in the buffer queue so that the given limits are
+* satisfied. TRUE if all the limits could be satisfied, FALSE if not
+* enough data was in the queue.
+*
+* FIXME, this code might now work if any of the units is in buffers...
+*/
+static gboolean
+find_limits (GstMultiFdSink * sink,
+gint * min_idx, gint bytes_min, gint buffers_min, gint64 time_min,
+gint * max_idx, gint bytes_max, gint buffers_max, gint64 time_max)
+{
+GstClockTime first, time;
+gint i, len, bytes;
+gboolean result, max_hit;
+/* take length of queue */
+len = sink->bufqueue->len;
+/* this must hold */
+g_assert (len > 0);
+GST_LOG_OBJECT (sink,
+"bytes_min %d, buffers_min %d, time_min %" GST_TIME_FORMAT
+", bytes_max %d, buffers_max %d, time_max %" GST_TIME_FORMAT, bytes_min,
+buffers_min, GST_TIME_ARGS (time_min), bytes_max, buffers_max,
+GST_TIME_ARGS (time_max));
+/* do the trivial buffer limit test */
+if (buffers_min != -1 && len < buffers_min) {
+*min_idx = len - 1;
+*max_idx = len - 1;
+return FALSE;
+}
+result = FALSE;
+/* else count bytes and time */
+first = -1;
+bytes = 0;
+/* unset limits */
+*min_idx = -1;
+*max_idx = -1;
+max_hit = FALSE;
+i = 0;
+/* loop through the buffers, when a limit is ok, mark it
+* as -1, we have at least one buffer in the queue. */
+do {
+GstBuffer *buf;
+/* if we checked all min limits, update result */
+if (bytes_min == -1 && time_min == -1 && *min_idx == -1) {
+/* don't go below 0 */
+*min_idx = MAX (i - 1, 0);
+}
+/* if we reached one max limit break out */
+if (max_hit) {
+/* i > 0 when we get here, we subtract one to get the position
+* of the previous buffer. */
+*max_idx = i - 1;
+/* we have valid complete result if we found a min_idx too */
+result = *min_idx != -1;
+break;
+}
+buf = g_array_index (sink->bufqueue, GstBuffer *, i);
+bytes += GST_BUFFER_SIZE (buf);
+/* take timestamp and save for the base first timestamp */
+if ((time = GST_BUFFER_TIMESTAMP (buf)) != -1) {
+GST_LOG_OBJECT (sink, "Ts %" GST_TIME_FORMAT " on buffer",
+GST_TIME_ARGS (time));
+if (first == -1)
+first = time;
+/* increase max usage if we did not fill enough. Note that
+* buffers are sorted from new to old, so the first timestamp is
+* bigger than the next one. */
+if (time_min != -1 && first - time >= time_min)
+time_min = -1;
+if (time_max != -1 && first - time >= time_max)
+max_hit = TRUE;
+} else {
+GST_LOG_OBJECT (sink, "No timestamp on buffer");
+}
+/* time is OK or unknown, check and increase if not enough bytes */
+if (bytes_min != -1) {
+if (bytes >= bytes_min)
+bytes_min = -1;
+}
+if (bytes_max != -1) {
+if (bytes >= bytes_max) {
+max_hit = TRUE;
+}
+}
+i++;
+}
+while (i < len);
+/* if we did not hit the max or min limit, set to buffer size */
+if (*max_idx == -1)
+*max_idx = len - 1;
+/* make sure min does not exceed max */
+if (*min_idx == -1)
+*min_idx = *max_idx;
+return result;
+}
+/* parse the unit/value pair and assign it to the result value of the
+* right type, leave the other values untouched
+*
+* Returns: FALSE if the unit is unknown or undefined. TRUE otherwise.
+*/
+static gboolean
+assign_value (GstUnitType unit, guint64 value, gint * bytes, gint * buffers,
+GstClockTime * time)
+{
+gboolean res = TRUE;
+/* set only the limit of the given format to the given value */
+switch (unit) {
+case GST_UNIT_TYPE_BUFFERS:
+*buffers = (gint) value;
+break;
+case GST_UNIT_TYPE_TIME:
+*time = value;
+break;
+case GST_UNIT_TYPE_BYTES:
+*bytes = (gint) value;
+break;
+case GST_UNIT_TYPE_UNDEFINED:
+default:
+res = FALSE;
+break;
+}
+return res;
+}
+/* count the index in the buffer queue to satisfy the given unit
+* and value pair starting from buffer at index 0.
+*
+* Returns: TRUE if there was enough data in the queue to satisfy the
+* burst values. @idx contains the index in the buffer that contains enough
+* data to satisfy the limits or the last buffer in the queue when the
+* function returns FALSE.
+*/
+static gboolean
+count_burst_unit (GstMultiFdSink * sink, gint * min_idx, GstUnitType min_unit,
+guint64 min_value, gint * max_idx, GstUnitType max_unit, guint64 max_value)
+{
+gint bytes_min = -1, buffers_min = -1;
+gint bytes_max = -1, buffers_max = -1;
+GstClockTime time_min = GST_CLOCK_TIME_NONE, time_max = GST_CLOCK_TIME_NONE;
+assign_value (min_unit, min_value, &bytes_min, &buffers_min, &time_min);
+assign_value (max_unit, max_value, &bytes_max, &buffers_max, &time_max);
+return find_limits (sink, min_idx, bytes_min, buffers_min, time_min,
+max_idx, bytes_max, buffers_max, time_max);
+}
+/* decide where in the current buffer queue this new client should start
+* receiving buffers from.
+* This function is called whenever a client is connected and has not yet
+* received a buffer.
+* If this returns -1, it means that we haven't found a good point to
+* start streaming from yet, and this function should be called again later
+* when more buffers have arrived.
+*/
+static gint
+gst_multi_fd_sink_new_client (GstMultiFdSink * sink, GstTCPClient * client)
+{
+gint result;
+GST_DEBUG_OBJECT (sink,
+"[fd %5d] new client, deciding where to start in queue", client->fd.fd);
+GST_DEBUG_OBJECT (sink, "queue is currently %d buffers long",
+sink->bufqueue->len);
+switch (client->sync_method) {
+case GST_SYNC_METHOD_LATEST:
+/* no syncing, we are happy with whatever the client is going to get */
+result = client->bufpos;
+GST_DEBUG_OBJECT (sink,
+"[fd %5d] SYNC_METHOD_LATEST, position %d", client->fd.fd, result);
+break;
+case GST_SYNC_METHOD_NEXT_KEYFRAME:
+{
+/* if one of the new buffers (between client->bufpos and 0) in the queue
+* is a sync point, we can proceed, otherwise we need to keep waiting */
+GST_LOG_OBJECT (sink,
+"[fd %5d] new client, bufpos %d, waiting for keyframe", client->fd.fd,
+client->bufpos);
+result = find_prev_syncframe (sink, client->bufpos);
+if (result != -1) {
+GST_DEBUG_OBJECT (sink,
+"[fd %5d] SYNC_METHOD_NEXT_KEYFRAME: result %d",
+client->fd.fd, result);
+break;
+}
+/* client is not on a syncbuffer, need to skip these buffers and
+* wait some more */
+GST_LOG_OBJECT (sink,
+"[fd %5d] new client, skipping buffer(s), no syncpoint found",
+client->fd.fd);
+client->bufpos = -1;
+break;
+}
+case GST_SYNC_METHOD_LATEST_KEYFRAME:
+{
+GST_DEBUG_OBJECT (sink,
+"[fd %5d] SYNC_METHOD_LATEST_KEYFRAME", client->fd.fd);
+/* for new clients we initially scan the complete buffer queue for
+* a sync point when a buffer is added. If we don't find a keyframe,
+* we need to wait for the next keyframe and so we change the client's
+* sync method to GST_SYNC_METHOD_NEXT_KEYFRAME.
+*/
+result = find_next_syncframe (sink, 0);
+if (result != -1) {
+GST_DEBUG_OBJECT (sink,
+"[fd %5d] SYNC_METHOD_LATEST_KEYFRAME: result %d", client->fd.fd,
+result);
+break;
+}
+GST_DEBUG_OBJECT (sink,
+"[fd %5d] SYNC_METHOD_LATEST_KEYFRAME: no keyframe found, "
+"switching to SYNC_METHOD_NEXT_KEYFRAME", client->fd.fd);
+/* throw client to the waiting state */
+client->bufpos = -1;
+/* and make client sync to next keyframe */
+client->sync_method = GST_SYNC_METHOD_NEXT_KEYFRAME;
+break;
+}
+case GST_SYNC_METHOD_BURST:
+{
+gboolean ok;
+gint max;
+/* move to the position where we satisfy the client's burst
+* parameters. If we could not satisfy the parameters because there
+* is not enough data, we just send what we have (which is in result).
+* We use the max value to limit the search
+*/
+ok = count_burst_unit (sink, &result, client->burst_min_unit,
+client->burst_min_value, &max, client->burst_max_unit,
+client->burst_max_value);
+GST_DEBUG_OBJECT (sink,
+"[fd %5d] SYNC_METHOD_BURST: burst_unit returned %d, result %d",
+client->fd.fd, ok, result);
+GST_LOG_OBJECT (sink, "min %d, max %d", result, max);
+/* we hit the max and it is below the min, use that then */
+if (max != -1 && max <= result) {
+result = MAX (max - 1, 0);
+GST_DEBUG_OBJECT (sink,
+"[fd %5d] SYNC_METHOD_BURST: result above max, taken down to %d",
+client->fd.fd, result);
+}
+break;
+}
+case GST_SYNC_METHOD_BURST_KEYFRAME:
+{
+gboolean ok;
+gint min_idx, max_idx;
+gint next_syncframe, prev_syncframe;
+/* BURST_KEYFRAME:
+*
+* _always_ start sending a keyframe to the client. We first search
+* a keyframe between min/max limits. If there is none, we send it the
+* last keyframe before min. If there is none, the behaviour is like
+* NEXT_KEYFRAME.
+*/
+/* gather burst limits */
+ok = count_burst_unit (sink, &min_idx, client->burst_min_unit,
+client->burst_min_value, &max_idx, client->burst_max_unit,
+client->burst_max_value);
+GST_LOG_OBJECT (sink, "min %d, max %d", min_idx, max_idx);
+/* first find a keyframe after min_idx */
+next_syncframe = find_next_syncframe (sink, min_idx);
+if (next_syncframe != -1 && next_syncframe < max_idx) {
+/* we have a valid keyframe and it's below the max */
+GST_LOG_OBJECT (sink, "found keyframe in min/max limits");
+result = next_syncframe;
+break;
+}
+/* no valid keyframe, try to find one below min */
+prev_syncframe = find_prev_syncframe (sink, min_idx);
+if (prev_syncframe != -1) {
+GST_WARNING_OBJECT (sink,
+"using keyframe below min in BURST_KEYFRAME sync mode");
+result = prev_syncframe;
+break;
+}
+/* no prev keyframe or not enough data  */
+GST_WARNING_OBJECT (sink,
+"no prev keyframe found in BURST_KEYFRAME sync mode, waiting for next");
+/* throw client to the waiting state */
+client->bufpos = -1;
+/* and make client sync to next keyframe */
+client->sync_method = GST_SYNC_METHOD_NEXT_KEYFRAME;
+result = -1;
+break;
+}
+case GST_SYNC_METHOD_BURST_WITH_KEYFRAME:
+{
+gboolean ok;
+gint min_idx, max_idx;
+gint next_syncframe;
+/* BURST_WITH_KEYFRAME:
+*
+* try to start sending a keyframe to the client. We first search
+* a keyframe between min/max limits. If there is none, we send it the
+* amount of data up 'till min.
+*/
+/* gather enough data to burst */
+ok = count_burst_unit (sink, &min_idx, client->burst_min_unit,
+client->burst_min_value, &max_idx, client->burst_max_unit,
+client->burst_max_value);
+GST_LOG_OBJECT (sink, "min %d, max %d", min_idx, max_idx);
+/* first find a keyframe after min_idx */
+next_syncframe = find_next_syncframe (sink, min_idx);
+if (next_syncframe != -1 && next_syncframe < max_idx) {
+/* we have a valid keyframe and it's below the max */
+GST_LOG_OBJECT (sink, "found keyframe in min/max limits");
+result = next_syncframe;
+break;
+}
+/* no keyframe, send data from min_idx */
+GST_WARNING_OBJECT (sink, "using min in BURST_WITH_KEYFRAME sync mode");
+/* make sure we don't go over the max limit */
+if (max_idx != -1 && max_idx <= min_idx) {
+result = MAX (max_idx - 1, 0);
+} else {
+result = min_idx;
+}
+break;
+}
+default:
+g_warning ("unknown sync method %d", client->sync_method);
+result = client->bufpos;
+break;
+}
+return result;
+}
+/* Handle a write on a client,
+* which indicates a read request from a client.
+*
+* For each client we maintain a queue of GstBuffers that contain the raw bytes
+* we need to send to the client. In the case of the GDP protocol, we create
+* buffers out of the header bytes so that we can focus only on sending
+* buffers.
+*
+* We first check to see if we need to send caps (in GDP) and streamheaders.
+* If so, we queue them.
+*
+* Then we run into the main loop that tries to send as many buffers as
+* possible. It will first exhaust the client->sending queue and if the queue
+* is empty, it will pick a buffer from the global queue.
+*
+* Sending the buffers from the client->sending queue is basically writing
+* the bytes to the socket and maintaining a count of the bytes that were
+* sent. When the buffer is completely sent, it is removed from the
+* client->sending queue and we try to pick a new buffer for sending.
+*
+* When the sending returns a partial buffer we stop sending more data as
+* the next send operation could block.
+*
+* This functions returns FALSE if some error occured.
+*/
+static gboolean
+gst_multi_fd_sink_handle_client_write (GstMultiFdSink * sink,
+GstTCPClient * client)
+{
+int fd = client->fd.fd;
+gboolean more;
+gboolean res;
+gboolean flushing;
+GstClockTime now;
+GTimeVal nowtv;
+g_get_current_time (&nowtv);
+now = GST_TIMEVAL_TO_TIME (nowtv);
+flushing = client->status == GST_CLIENT_STATUS_FLUSHING;
+/* when using GDP, first check if we have queued caps yet */
+if (sink->protocol == GST_TCP_PROTOCOL_GDP) {
+/* don't need to do anything when the client is flushing */
+if (!client->caps_sent && !flushing) {
+GstPad *peer;
+GstCaps *caps;
+peer = gst_pad_get_peer (GST_BASE_SINK_PAD (sink));
+if (!peer) {
+GST_WARNING_OBJECT (sink, "pad has no peer");
+return FALSE;
+}
+gst_object_unref (peer);
+caps = gst_pad_get_negotiated_caps (GST_BASE_SINK_PAD (sink));
+if (!caps) {
+GST_WARNING_OBJECT (sink, "pad caps not yet negotiated");
+return FALSE;
+}
+/* queue caps for sending */
+res = gst_multi_fd_sink_client_queue_caps (sink, client, caps);
+gst_caps_unref (caps);
+if (!res) {
+GST_DEBUG_OBJECT (sink, "Failed queueing caps, removing client");
+return FALSE;
+}
+client->caps_sent = TRUE;
+}
+}
+more = TRUE;
+do {
+gint maxsize;
+if (!client->sending) {
+/* client is not working on a buffer */
+if (client->bufpos == -1) {
+/* client is too fast, remove from write queue until new buffer is
+* available */
+gst_poll_fd_ctl_write (sink->fdset, &client->fd, FALSE);
+/* if we flushed out all of the client buffers, we can stop */
+if (client->flushcount == 0)
+goto flushed;
+return TRUE;
+} else {
+/* client can pick a buffer from the global queue */
+GstBuffer *buf;
+/* for new connections, we need to find a good spot in the
+* bufqueue to start streaming from */
+if (client->new_connection && !flushing) {
+gint position = gst_multi_fd_sink_new_client (sink, client);
+if (position >= 0) {
+/* we got a valid spot in the queue */
+client->new_connection = FALSE;
+client->bufpos = position;
+} else {
+/* cannot send data to this client yet */
+gst_poll_fd_ctl_write (sink->fdset, &client->fd, FALSE);
+return TRUE;
+}
+}
+/* we flushed all remaining buffers, no need to get a new one */
+if (client->flushcount == 0)
+goto flushed;
+/* grab buffer */
+buf = g_array_index (sink->bufqueue, GstBuffer *, client->bufpos);
+client->bufpos--;
+/* decrease flushcount */
+if (client->flushcount != -1)
+client->flushcount--;
+GST_LOG_OBJECT (sink, "[fd %5d] client %p at position %d",
+fd, client, client->bufpos);
+/* queueing a buffer will ref it */
+gst_multi_fd_sink_client_queue_buffer (sink, client, buf);
+/* need to start from the first byte for this new buffer */
+client->bufoffset = 0;
+}
+}
+/* see if we need to send something */
+if (client->sending) {
+ssize_t wrote;
+GstBuffer *head;
+/* pick first buffer from list */
+head = GST_BUFFER (client->sending->data);
+maxsize = GST_BUFFER_SIZE (head) - client->bufoffset;
+/* try to write the complete buffer */
+#ifdef MSG_NOSIGNAL
+#define FLAGS MSG_NOSIGNAL
+#else
+#define FLAGS 0
+#endif
+if (client->is_socket) {
+wrote =
+send (fd, GST_BUFFER_DATA (head) + client->bufoffset, maxsize,
+FLAGS);
+} else {
+wrote = write (fd, GST_BUFFER_DATA (head) + client->bufoffset, maxsize);
+}
+if (wrote < 0) {
+/* hmm error.. */
+if (errno == EAGAIN) {
+/* nothing serious, resource was unavailable, try again later */
+more = FALSE;
+} else if (errno == ECONNRESET) {
+goto connection_reset;
+} else {
+goto write_error;
+}
+} else {
+if (wrote < maxsize) {
+/* partial write means that the client cannot read more and we should
+* stop sending more */
+GST_LOG_OBJECT (sink,
+"partial write on %d of %" G_GSSIZE_FORMAT " bytes", fd, wrote);
+client->bufoffset += wrote;
+more = FALSE;
+} else {
+/* complete buffer was written, we can proceed to the next one */
+client->sending = g_slist_remove (client->sending, head);
+gst_buffer_unref (head);
+/* make sure we start from byte 0 for the next buffer */
+client->bufoffset = 0;
+}
+/* update stats */
+client->bytes_sent += wrote;
+client->last_activity_time = now;
+sink->bytes_served += wrote;
+}
+}
+} while (more);
+return TRUE;
+/* ERRORS */
+flushed:
+{
+GST_DEBUG_OBJECT (sink, "[fd %5d] flushed, removing", fd);
+client->status = GST_CLIENT_STATUS_REMOVED;
+return FALSE;
+}
+connection_reset:
+{
+GST_DEBUG_OBJECT (sink, "[fd %5d] connection reset by peer, removing", fd);
+client->status = GST_CLIENT_STATUS_CLOSED;
+return FALSE;
+}
+write_error:
+{
+GST_WARNING_OBJECT (sink,
+"[fd %5d] could not write, removing client: %s (%d)", fd,
+g_strerror (errno), errno);
+client->status = GST_CLIENT_STATUS_ERROR;
+return FALSE;
+}
+}
+/* calculate the new position for a client after recovery. This function
+* does not update the client position but merely returns the required
+* position.
+*/
+static gint
+gst_multi_fd_sink_recover_client (GstMultiFdSink * sink, GstTCPClient * client)
+{
+gint newbufpos;
+GST_WARNING_OBJECT (sink,
+"[fd %5d] client %p is lagging at %d, recover using policy %d",
+client->fd.fd, client, client->bufpos, sink->recover_policy);
+switch (sink->recover_policy) {
+case GST_RECOVER_POLICY_NONE:
+/* do nothing, client will catch up or get kicked out when it reaches
+* the hard max */
+newbufpos = client->bufpos;
+break;
+case GST_RECOVER_POLICY_RESYNC_LATEST:
+/* move to beginning of queue */
+newbufpos = -1;
+break;
+case GST_RECOVER_POLICY_RESYNC_SOFT_LIMIT:
+/* move to beginning of soft max */
+newbufpos = get_buffers_max (sink, sink->units_soft_max);
+break;
+case GST_RECOVER_POLICY_RESYNC_KEYFRAME:
+/* find keyframe in buffers, we search backwards to find the
+* closest keyframe relative to what this client already received. */
+newbufpos = MIN (sink->bufqueue->len - 1,
+get_buffers_max (sink, sink->units_soft_max) - 1);
+while (newbufpos >= 0) {
+GstBuffer *buf;
+buf = g_array_index (sink->bufqueue, GstBuffer *, newbufpos);
+if (is_sync_frame (sink, buf)) {
+/* found a buffer that is not a delta unit */
+break;
+}
+newbufpos--;
+}
+break;
+default:
+/* unknown recovery procedure */
+newbufpos = get_buffers_max (sink, sink->units_soft_max);
+break;
+}
+return newbufpos;
+}
+/* Queue a buffer on the global queue.
+*
+* This function adds the buffer to the front of a GArray. It removes the
+* tail buffer if the max queue size is exceeded, unreffing the queued buffer.
+* Note that unreffing the buffer is not a problem as clients who
+* started writing out this buffer will still have a reference to it in the
+* client->sending queue.
+*
+* After adding the buffer, we update all client positions in the queue. If
+* a client moves over the soft max, we start the recovery procedure for this
+* slow client. If it goes over the hard max, it is put into the slow list
+* and removed.
+*
+* Special care is taken of clients that were waiting for a new buffer (they
+* had a position of -1) because they can proceed after adding this new buffer.
+* This is done by adding the client back into the write fd_set and signalling
+* the select thread that the fd_set changed.
+*/
+static void
+gst_multi_fd_sink_queue_buffer (GstMultiFdSink * sink, GstBuffer * buf)
+{
+GList *clients, *next;
+gint queuelen;
+gboolean need_signal = FALSE;
+gint max_buffer_usage;
+gint i;
+GTimeVal nowtv;
+GstClockTime now;
+gint max_buffers, soft_max_buffers;
+guint cookie;
+g_get_current_time (&nowtv);
+now = GST_TIMEVAL_TO_TIME (nowtv);
+CLIENTS_LOCK (sink);
+/* add buffer to queue */
+g_array_prepend_val (sink->bufqueue, buf);
+queuelen = sink->bufqueue->len;
+if (sink->units_max > 0)
+max_buffers = get_buffers_max (sink, sink->units_max);
+else
+max_buffers = -1;
+if (sink->units_soft_max > 0)
+soft_max_buffers = get_buffers_max (sink, sink->units_soft_max);
+else
+soft_max_buffers = -1;
+GST_LOG_OBJECT (sink, "Using max %d, softmax %d", max_buffers,
+soft_max_buffers);
+/* then loop over the clients and update the positions */
+max_buffer_usage = 0;
+restart:
+cookie = sink->clients_cookie;
+for (clients = sink->clients; clients; clients = next) {
+GstTCPClient *client;
+if (cookie != sink->clients_cookie) {
+GST_DEBUG_OBJECT (sink, "Clients cookie outdated, restarting");
+goto restart;
+}
+client = (GstTCPClient *) clients->data;
+next = g_list_next (clients);
+client->bufpos++;
+GST_LOG_OBJECT (sink, "[fd %5d] client %p at position %d",
+client->fd.fd, client, client->bufpos);
+/* check soft max if needed, recover client */
+if (soft_max_buffers > 0 && client->bufpos >= soft_max_buffers) {
+gint newpos;
+newpos = gst_multi_fd_sink_recover_client (sink, client);
+if (newpos != client->bufpos) {
+client->dropped_buffers += client->bufpos - newpos;
+client->bufpos = newpos;
+client->discont = TRUE;
+GST_INFO_OBJECT (sink, "[fd %5d] client %p position reset to %d",
+client->fd.fd, client, client->bufpos);
+} else {
+GST_INFO_OBJECT (sink,
+"[fd %5d] client %p not recovering position",
+client->fd.fd, client);
+}
+}
+/* check hard max and timeout, remove client */
+if ((max_buffers > 0 && client->bufpos >= max_buffers) ||
+(sink->timeout > 0
+&& now - client->last_activity_time > sink->timeout)) {
+/* remove client */
+GST_WARNING_OBJECT (sink, "[fd %5d] client %p is too slow, removing",
+client->fd.fd, client);
+/* remove the client, the fd set will be cleared and the select thread
+* will be signaled */
+client->status = GST_CLIENT_STATUS_SLOW;
+/* set client to invalid position while being removed */
+client->bufpos = -1;
+gst_multi_fd_sink_remove_client_link (sink, clients);
+need_signal = TRUE;
+continue;
+} else if (client->bufpos == 0 || client->new_connection) {
+/* can send data to this client now. need to signal the select thread that
+* the fd_set changed */
+gst_poll_fd_ctl_write (sink->fdset, &client->fd, TRUE);
+need_signal = TRUE;
+}
+/* keep track of maximum buffer usage */
+if (client->bufpos > max_buffer_usage) {
+max_buffer_usage = client->bufpos;
+}
+}
+/* make sure we respect bytes-min, buffers-min and time-min when they are set */
+{
+gint usage, max;
+GST_LOG_OBJECT (sink,
+"extending queue %d to respect time_min %" GST_TIME_FORMAT
+", bytes_min %d, buffers_min %d", max_buffer_usage,
+GST_TIME_ARGS (sink->time_min), sink->bytes_min, sink->buffers_min);
+/* get index where the limits are ok, we don't really care if all limits
+* are ok, we just queue as much as we need. We also don't compare against
+* the max limits. */
+find_limits (sink, &usage, sink->bytes_min, sink->buffers_min,
+sink->time_min, &max, -1, -1, -1);
+max_buffer_usage = MAX (max_buffer_usage, usage + 1);
+GST_LOG_OBJECT (sink, "extended queue to %d", max_buffer_usage);
+}
+/* now look for sync points and make sure there is at least one
+* sync point in the queue. We only do this if the LATEST_KEYFRAME or
+* BURST_KEYFRAME mode is selected */
+if (sink->def_sync_method == GST_SYNC_METHOD_LATEST_KEYFRAME ||
+sink->def_sync_method == GST_SYNC_METHOD_BURST_KEYFRAME) {
+/* no point in searching beyond the queue length */
+gint limit = queuelen;
+GstBuffer *buf;
+/* no point in searching beyond the soft-max if any. */
+if (soft_max_buffers) {
+limit = MIN (limit, soft_max_buffers);
+}
+GST_LOG_OBJECT (sink, "extending queue to include sync point, now at %d",
+max_buffer_usage);
+for (i = 0; i < limit; i++) {
+buf = g_array_index (sink->bufqueue, GstBuffer *, i);
+if (is_sync_frame (sink, buf)) {
+/* found a sync frame, now extend the buffer usage to
+* include at least this frame. */
+max_buffer_usage = MAX (max_buffer_usage, i);
+break;
+}
+}
+GST_LOG_OBJECT (sink, "max buffer usage is now %d", max_buffer_usage);
+}
+GST_LOG_OBJECT (sink, "len %d, usage %d", queuelen, max_buffer_usage);
+/* nobody is referencing units after max_buffer_usage so we can
+* remove them from the queue. We remove them in reverse order as
+* this is the most optimal for GArray. */
+for (i = queuelen - 1; i > max_buffer_usage; i--) {
+GstBuffer *old;
+/* queue exceeded max size */
+queuelen--;
+old = g_array_index (sink->bufqueue, GstBuffer *, i);
+sink->bufqueue = g_array_remove_index (sink->bufqueue, i);
+/* unref tail buffer */
+gst_buffer_unref (old);
+}
+/* save for stats */
+sink->buffers_queued = max_buffer_usage;
+CLIENTS_UNLOCK (sink);
+/* and send a signal to thread if fd_set changed */
+if (need_signal) {
+gst_poll_restart (sink->fdset);
+}
+}
+/* Handle the clients. Basically does a blocking select for one
+* of the client fds to become read or writable. We also have a
+* filedescriptor to receive commands on that we need to check.
+*
+* After going out of the select call, we read and write to all
+* clients that can do so. Badly behaving clients are put on a
+* garbage list and removed.
+*/
+static void
+gst_multi_fd_sink_handle_clients (GstMultiFdSink * sink)
+{
+int result;
+GList *clients, *next;
+gboolean try_again;
+GstMultiFdSinkClass *fclass;
+guint cookie;
+fclass = GST_MULTI_FD_SINK_GET_CLASS (sink);
+do {
+try_again = FALSE;
+/* check for:
+* - server socket input (ie, new client connections)
+* - client socket input (ie, clients saying goodbye)
+* - client socket output (ie, client reads)          */
+GST_LOG_OBJECT (sink, "waiting on action on fdset");
+result = gst_poll_wait (sink->fdset, GST_CLOCK_TIME_NONE);
+/* < 0 is an error, 0 just means a timeout happened, which is impossible */
+if (result < 0) {
+GST_WARNING_OBJECT (sink, "wait failed: %s (%d)", g_strerror (errno),
+errno);
+if (errno == EBADF) {
+/* ok, so one or more of the fds is invalid. We loop over them to find
+* the ones that give an error to the F_GETFL fcntl. */
+CLIENTS_LOCK (sink);
+restart:
+cookie = sink->clients_cookie;
+for (clients = sink->clients; clients; clients = next) {
+GstTCPClient *client;
+int fd;
+long flags;
+int res;
+if (cookie != sink->clients_cookie) {
+GST_DEBUG_OBJECT (sink, "Cookie changed finding bad fd");
+goto restart;
+}
+client = (GstTCPClient *) clients->data;
+next = g_list_next (clients);
+fd = client->fd.fd;
+res = fcntl (fd, F_GETFL, &flags);
+if (res == -1) {
+GST_WARNING_OBJECT (sink, "fnctl failed for %d, removing: %s (%d)",
+fd, g_strerror (errno), errno);
+if (errno == EBADF) {
+client->status = GST_CLIENT_STATUS_ERROR;
+gst_multi_fd_sink_remove_client_link (sink, clients);
+}
+}
+}
+CLIENTS_UNLOCK (sink);
+/* after this, go back in the select loop as the read/writefds
+* are not valid */
+try_again = TRUE;
+} else if (errno == EINTR) {
+/* interrupted system call, just redo the wait */
+try_again = TRUE;
+} else if (errno == EBUSY) {
+/* the call to gst_poll_wait() was flushed */
+return;
+} else {
+/* this is quite bad... */
+GST_ELEMENT_ERROR (sink, RESOURCE, READ, (NULL),
+("select failed: %s (%d)", g_strerror (errno), errno));
+return;
+}
+} else {
+GST_LOG_OBJECT (sink, "wait done: %d sockets with events", result);
+}
+} while (try_again);
+/* subclasses can check fdset with this virtual function */
+if (fclass->wait)
+fclass->wait (sink, sink->fdset);
+/* Check the clients */
+CLIENTS_LOCK (sink);
+restart2:
+cookie = sink->clients_cookie;
+for (clients = sink->clients; clients; clients = next) {
+GstTCPClient *client;
+if (sink->clients_cookie != cookie) {
+GST_DEBUG_OBJECT (sink, "Restarting loop, cookie out of date");
+goto restart2;
+}
+client = (GstTCPClient *) clients->data;
+next = g_list_next (clients);
+if (client->status != GST_CLIENT_STATUS_FLUSHING
+&& client->status != GST_CLIENT_STATUS_OK) {
+gst_multi_fd_sink_remove_client_link (sink, clients);
+continue;
+}
+if (gst_poll_fd_has_closed (sink->fdset, &client->fd)) {
+client->status = GST_CLIENT_STATUS_CLOSED;
+gst_multi_fd_sink_remove_client_link (sink, clients);
+continue;
+}
+if (gst_poll_fd_has_error (sink->fdset, &client->fd)) {
+GST_WARNING_OBJECT (sink, "gst_poll_fd_has_error for %d", client->fd.fd);
+client->status = GST_CLIENT_STATUS_ERROR;
+gst_multi_fd_sink_remove_client_link (sink, clients);
+continue;
+}
+if (gst_poll_fd_can_read (sink->fdset, &client->fd)) {
+/* handle client read */
+if (!gst_multi_fd_sink_handle_client_read (sink, client)) {
+gst_multi_fd_sink_remove_client_link (sink, clients);
+continue;
+}
+}
+if (gst_poll_fd_can_write (sink->fdset, &client->fd)) {
+/* handle client write */
+if (!gst_multi_fd_sink_handle_client_write (sink, client)) {
+gst_multi_fd_sink_remove_client_link (sink, clients);
+continue;
+}
+}
+}
+CLIENTS_UNLOCK (sink);
+}
+/* we handle the client communication in another thread so that we do not block
+* the gstreamer thread while we select() on the client fds */
+static gpointer
+gst_multi_fd_sink_thread (GstMultiFdSink * sink)
+{
+while (sink->running) {
+gst_multi_fd_sink_handle_clients (sink);
+}
+return NULL;
+}
+static GstFlowReturn
+gst_multi_fd_sink_render (GstBaseSink * bsink, GstBuffer * buf)
+{
+GstMultiFdSink *sink;
+gboolean in_caps;
+GstCaps *bufcaps, *padcaps;
+sink = GST_MULTI_FD_SINK (bsink);
+g_return_val_if_fail (GST_OBJECT_FLAG_IS_SET (sink, GST_MULTI_FD_SINK_OPEN),
+GST_FLOW_WRONG_STATE);
+/* since we check every buffer for streamheader caps, we need to make
+* sure every buffer has caps set */
+bufcaps = gst_buffer_get_caps (buf);
+padcaps = GST_PAD_CAPS (GST_BASE_SINK_PAD (bsink));
+/* make sure we have caps on the pad */
+if (!padcaps && !bufcaps)
+goto no_caps;
+/* get IN_CAPS first, code below might mess with the flags */
+in_caps = GST_BUFFER_FLAG_IS_SET (buf, GST_BUFFER_FLAG_IN_CAPS);
+/* stamp the buffer with previous caps if no caps set */
+if (!bufcaps) {
+if (!gst_buffer_is_metadata_writable (buf)) {
+/* metadata is not writable, copy will be made and original buffer
+* will be unreffed so we need to ref so that we don't lose the
+* buffer in the render method. */
+gst_buffer_ref (buf);
+/* the new buffer is ours only, we keep it out of the scope of this
+* function */
+buf = gst_buffer_make_metadata_writable (buf);
+} else {
+/* else the metadata is writable, we ref because we keep the buffer
+* out of the scope of this method */
+gst_buffer_ref (buf);
+}
+/* buffer metadata is writable now, set the caps */
+gst_buffer_set_caps (buf, padcaps);
+} else {
+gst_caps_unref (bufcaps);
+/* since we keep this buffer out of the scope of this method */
+gst_buffer_ref (buf);
+}
+GST_LOG_OBJECT (sink, "received buffer %p, in_caps: %s, offset %"
+G_GINT64_FORMAT ", offset_end %" G_GINT64_FORMAT
+", timestamp %" GST_TIME_FORMAT ", duration %" GST_TIME_FORMAT,
+buf, in_caps ? "yes" : "no", GST_BUFFER_OFFSET (buf),
+GST_BUFFER_OFFSET_END (buf),
+GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (buf)),
+GST_TIME_ARGS (GST_BUFFER_DURATION (buf)));
+/* if we get IN_CAPS buffers, but the previous buffer was not IN_CAPS,
+* it means we're getting new streamheader buffers, and we should clear
+* the old ones */
+if (in_caps && sink->previous_buffer_in_caps == FALSE) {
+GST_DEBUG_OBJECT (sink,
+"receiving new IN_CAPS buffers, clearing old streamheader");
+g_slist_foreach (sink->streamheader, (GFunc) gst_mini_object_unref, NULL);
+g_slist_free (sink->streamheader);
+sink->streamheader = NULL;
+}
+/* save the current in_caps */
+sink->previous_buffer_in_caps = in_caps;
+/* if the incoming buffer is marked as IN CAPS, then we assume for now
+* it's a streamheader that needs to be sent to each new client, so we
+* put it on our internal list of streamheader buffers.
+* FIXME: we could check if the buffer's contents are in fact part of the
+* current streamheader.
+*
+* We don't send the buffer to the client, since streamheaders are sent
+* separately when necessary. */
+if (in_caps) {
+GST_DEBUG_OBJECT (sink,
+"appending IN_CAPS buffer with length %d to streamheader",
+GST_BUFFER_SIZE (buf));
+sink->streamheader = g_slist_append (sink->streamheader, buf);
+} else {
+/* queue the buffer, this is a regular data buffer. */
+gst_multi_fd_sink_queue_buffer (sink, buf);
+sink->bytes_to_serve += GST_BUFFER_SIZE (buf);
+}
+return GST_FLOW_OK;
+/* ERRORS */
+no_caps:
+{
+GST_ELEMENT_ERROR (sink, CORE, NEGOTIATION, (NULL),
+("Received first buffer without caps set"));
+return GST_FLOW_NOT_NEGOTIATED;
+}
+}
+static void
+gst_multi_fd_sink_set_property (GObject * object, guint prop_id,
+const GValue * value, GParamSpec * pspec)
+{
+GstMultiFdSink *multifdsink;
+multifdsink = GST_MULTI_FD_SINK (object);
+switch (prop_id) {
+case PROP_PROTOCOL:
+multifdsink->protocol = g_value_get_enum (value);
+break;
+case PROP_MODE:
+multifdsink->mode = g_value_get_enum (value);
+break;
+case PROP_BUFFERS_MAX:
+multifdsink->units_max = g_value_get_int (value);
+break;
+case PROP_BUFFERS_SOFT_MAX:
+multifdsink->units_soft_max = g_value_get_int (value);
+break;
+case PROP_TIME_MIN:
+multifdsink->time_min = g_value_get_int64 (value);
+break;
+case PROP_BYTES_MIN:
+multifdsink->bytes_min = g_value_get_int (value);
+break;
+case PROP_BUFFERS_MIN:
+multifdsink->buffers_min = g_value_get_int (value);
+break;
+case PROP_UNIT_TYPE:
+multifdsink->unit_type = g_value_get_enum (value);
+break;
+case PROP_UNITS_MAX:
+multifdsink->units_max = g_value_get_int64 (value);
+break;
+case PROP_UNITS_SOFT_MAX:
+multifdsink->units_soft_max = g_value_get_int64 (value);
+break;
+case PROP_RECOVER_POLICY:
+multifdsink->recover_policy = g_value_get_enum (value);
+break;
+case PROP_TIMEOUT:
+multifdsink->timeout = g_value_get_uint64 (value);
+break;
+case PROP_SYNC_METHOD:
+multifdsink->def_sync_method = g_value_get_enum (value);
+break;
+case PROP_BURST_UNIT:
+multifdsink->def_burst_unit = g_value_get_enum (value);
+break;
+case PROP_BURST_VALUE:
+multifdsink->def_burst_value = g_value_get_uint64 (value);
+break;
+default:
+G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+break;
+}
+}
+static void
+gst_multi_fd_sink_get_property (GObject * object, guint prop_id, GValue * value,
+GParamSpec * pspec)
+{
+GstMultiFdSink *multifdsink;
+multifdsink = GST_MULTI_FD_SINK (object);
+switch (prop_id) {
+case PROP_PROTOCOL:
+g_value_set_enum (value, multifdsink->protocol);
+break;
+case PROP_MODE:
+g_value_set_enum (value, multifdsink->mode);
+break;
+case PROP_BUFFERS_MAX:
+g_value_set_int (value, multifdsink->units_max);
+break;
+case PROP_BUFFERS_SOFT_MAX:
+g_value_set_int (value, multifdsink->units_soft_max);
+break;
+case PROP_TIME_MIN:
+g_value_set_int64 (value, multifdsink->time_min);
+break;
+case PROP_BYTES_MIN:
+g_value_set_int (value, multifdsink->bytes_min);
+break;
+case PROP_BUFFERS_MIN:
+g_value_set_int (value, multifdsink->buffers_min);
+break;
+case PROP_BUFFERS_QUEUED:
+g_value_set_uint (value, multifdsink->buffers_queued);
+break;
+case PROP_BYTES_QUEUED:
+g_value_set_uint (value, multifdsink->bytes_queued);
+break;
+case PROP_TIME_QUEUED:
+g_value_set_uint64 (value, multifdsink->time_queued);
+break;
+case PROP_UNIT_TYPE:
+g_value_set_enum (value, multifdsink->unit_type);
+break;
+case PROP_UNITS_MAX:
+g_value_set_int64 (value, multifdsink->units_max);
+break;
+case PROP_UNITS_SOFT_MAX:
+g_value_set_int64 (value, multifdsink->units_soft_max);
+break;
+case PROP_RECOVER_POLICY:
+g_value_set_enum (value, multifdsink->recover_policy);
+break;
+case PROP_TIMEOUT:
+g_value_set_uint64 (value, multifdsink->timeout);
+break;
+case PROP_SYNC_METHOD:
+g_value_set_enum (value, multifdsink->def_sync_method);
+break;
+case PROP_BYTES_TO_SERVE:
+g_value_set_uint64 (value, multifdsink->bytes_to_serve);
+break;
+case PROP_BYTES_SERVED:
+g_value_set_uint64 (value, multifdsink->bytes_served);
+break;
+case PROP_BURST_UNIT:
+g_value_set_enum (value, multifdsink->def_burst_unit);
+break;
+case PROP_BURST_VALUE:
+g_value_set_uint64 (value, multifdsink->def_burst_value);
+break;
+default:
+G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+break;
+}
+}
+/* create a socket for sending to remote machine */
+static gboolean
+gst_multi_fd_sink_start (GstBaseSink * bsink)
+{
+GstMultiFdSinkClass *fclass;
+GstMultiFdSink *this;
+if (GST_OBJECT_FLAG_IS_SET (bsink, GST_MULTI_FD_SINK_OPEN))
+return TRUE;
+this = GST_MULTI_FD_SINK (bsink);
+fclass = GST_MULTI_FD_SINK_GET_CLASS (this);
+GST_INFO_OBJECT (this, "starting in mode %d", this->mode);
+if ((this->fdset = gst_poll_new (TRUE)) == NULL)
+goto socket_pair;
+this->streamheader = NULL;
+this->bytes_to_serve = 0;
+this->bytes_served = 0;
+if (fclass->init) {
+fclass->init (this);
+}
+this->running = TRUE;
+this->thread = g_thread_create ((GThreadFunc) gst_multi_fd_sink_thread,
+this, TRUE, NULL);
+GST_OBJECT_FLAG_SET (this, GST_MULTI_FD_SINK_OPEN);
+return TRUE;
+/* ERRORS */
+socket_pair:
+{
+GST_ELEMENT_ERROR (this, RESOURCE, OPEN_READ_WRITE, (NULL),
+GST_ERROR_SYSTEM);
+return FALSE;
+}
+}
+static gboolean
+multifdsink_hash_remove (gpointer key, gpointer value, gpointer data)
+{
+return TRUE;
+}
+static gboolean
+gst_multi_fd_sink_stop (GstBaseSink * bsink)
+{
+GstMultiFdSinkClass *fclass;
+GstMultiFdSink *this;
+GstBuffer *buf;
+int i;
+this = GST_MULTI_FD_SINK (bsink);
+fclass = GST_MULTI_FD_SINK_GET_CLASS (this);
+if (!GST_OBJECT_FLAG_IS_SET (bsink, GST_MULTI_FD_SINK_OPEN))
+return TRUE;
+this->running = FALSE;
+gst_poll_set_flushing (this->fdset, TRUE);
+if (this->thread) {
+GST_DEBUG_OBJECT (this, "joining thread");
+g_thread_join (this->thread);
+GST_DEBUG_OBJECT (this, "joined thread");
+this->thread = NULL;
+}
+/* free the clients */
+gst_multi_fd_sink_clear (this);
+if (this->streamheader) {
+g_slist_foreach (this->streamheader, (GFunc) gst_mini_object_unref, NULL);
+g_slist_free (this->streamheader);
+this->streamheader = NULL;
+}
+if (fclass->close)
+fclass->close (this);
+if (this->fdset) {
+gst_poll_free (this->fdset);
+this->fdset = NULL;
+}
+g_hash_table_foreach_remove (this->fd_hash, multifdsink_hash_remove, this);
+/* remove all queued buffers */
+if (this->bufqueue) {
+GST_DEBUG_OBJECT (this, "Emptying bufqueue with %d buffers",
+this->bufqueue->len);
+for (i = this->bufqueue->len - 1; i >= 0; --i) {
+buf = g_array_index (this->bufqueue, GstBuffer *, i);
+GST_LOG_OBJECT (this, "Removing buffer %p (%d) with refcount %d", buf, i,
+GST_MINI_OBJECT_REFCOUNT (buf));
+gst_buffer_unref (buf);
+this->bufqueue = g_array_remove_index (this->bufqueue, i);
+}
+/* freeing the array is done in _finalize */
+}
+GST_OBJECT_FLAG_UNSET (this, GST_MULTI_FD_SINK_OPEN);
+return TRUE;
+}
+static GstStateChangeReturn
+gst_multi_fd_sink_change_state (GstElement * element, GstStateChange transition)
+{
+GstMultiFdSink *sink;
+GstStateChangeReturn ret;
+sink = GST_MULTI_FD_SINK (element);
+/* we disallow changing the state from the streaming thread */
+if (g_thread_self () == sink->thread)
+return GST_STATE_CHANGE_FAILURE;
+switch (transition) {
+case GST_STATE_CHANGE_NULL_TO_READY:
+if (!gst_multi_fd_sink_start (GST_BASE_SINK (sink)))
+goto start_failed;
+break;
+case GST_STATE_CHANGE_READY_TO_PAUSED:
+break;
+case GST_STATE_CHANGE_PAUSED_TO_PLAYING:
+break;
+default:
+break;
+}
+ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
+switch (transition) {
+case GST_STATE_CHANGE_PLAYING_TO_PAUSED:
+break;
+case GST_STATE_CHANGE_PAUSED_TO_READY:
+break;
+case GST_STATE_CHANGE_READY_TO_NULL:
+gst_multi_fd_sink_stop (GST_BASE_SINK (sink));
+break;
+default:
+break;
+}
+return ret;
+/* ERRORS */
+start_failed:
+{
+/* error message was posted */
+return GST_STATE_CHANGE_FAILURE;
+}
+}

changeset 2	5505e8908944
parent 0	0e761a78d257
child 7	567bb019e3e3