--- /dev/null
+/* 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
+ * @see_also: tcpserversink
+ *
+ * This plugin writes incoming data to a set of file descriptors. The
+ * file descriptors can be added to multifdsink by emitting the #GstMultiFdSink::add signal.
+ * For each descriptor added, the #GstMultiFdSink::client-added signal will be called.
+ *
+ * As of version 0.10.8, a client can also be added with the #GstMultiFdSink::add-full signal
+ * that allows for more control over what and how much data a client
+ * initially receives.
+ *
+ * Clients can be removed from multifdsink by emitting the #GstMultiFdSink::remove signal. For
+ * each descriptor removed, the #GstMultiFdSink::client-removed signal will be called. The
+ * #GstMultiFdSink::client-removed signal can also be fired when multifdsink decides that a
+ * client is not active anymore or, depending on the value of the
+ * #GstMultiFdSink: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 #GstMultiFdSink::client-fd-removed signal.
+ * Note that multifdsink still has a reference to the file descriptor when the
+ * #GstMultiFdSink::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 #GstMultiFdSink::client-removed signal handler, and you should use the
+ * #GstMultiFdSink::client-fd-removed signal to safely close the fd.
+ *
+ * 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.
+ *
+ * When adding a client to multifdsink, the #GstMultiFdSink: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.
+ *
+ * As of version 0.10.8, there are additional values for the #GstMultiFdSink: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.
+ *
+ * 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
+ * #GstMultiFdSink:time-min and #GstMultiFdSink:bytes-min properties respectively.
+ * These properties are useful if the application adds clients with the
+ * #GstMultiFdSink::add-full signal to make sure that a burst connect can
+ * actually be honored.
+ *
+ * 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: #GstMultiFdSink:buffers-max and
+ * #GstMultiFdSink:buffers-soft-max. A client that falls behind by
+ * #GstMultiFdSink:buffers-max is removed from multifdsink forcibly.
+ *
+ * A client with a lag of at least #GstMultiFdSink:buffers-soft-max enters the recovery
+ * procedure which is controlled with the #GstMultiFdSink: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.
+ *
+ * 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.
+ *
+ * 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>
+
+#ifdef HAVE_UNISTD_H
+#include <unistd.h>
+#endif
+
+#include <fcntl.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <sys/stat.h>
+#include <netinet/in.h>
+
+#ifdef HAVE_FIONREAD_IN_SYS_FILIO
+#include <sys/filio.h>
+#endif
+
+#include "gstmultifdsink.h"
+#include "gsttcp-marshal.h"
+
+#define NOT_IMPLEMENTED 0
+
+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_TCP_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_TCP_UNIT_TYPE_UNDEFINED
+#define DEFAULT_BURST_VALUE 0
+
+#define DEFAULT_QOS_DSCP -1
+#define DEFAULT_HANDLE_READ TRUE
+
+#define DEFAULT_RESEND_STREAMHEADER TRUE
+
+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,
+
+ PROP_QOS_DSCP,
+
+ PROP_HANDLE_READ,
+
+ PROP_RESEND_STREAMHEADER,
+
+ PROP_NUM_FDS,
+
+ PROP_LAST
+};
+
+/* 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_TCP_UNIT_TYPE_UNDEFINED, "Undefined", "undefined"},
+ {GST_TCP_UNIT_TYPE_BUFFERS, "Buffers", "buffers"},
+ {GST_TCP_UNIT_TYPE_BYTES, "Bytes", "bytes"},
+ {GST_TCP_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_simple (element_class,
+ "Multi filedescriptor sink", "Sink/Network",
+ "Send data to multiple filedescriptors",
+ "Thomas Vander Stichele <thomas at apestaart dot org>, "
+ "Wim Taymans <wim@fluendo.com>");
+}
+
+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"
+ ". GDP protocol here is deprecated. Please use gdppay element.",
+ GST_TYPE_TCP_PROTOCOL, DEFAULT_PROTOCOL,
+ G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
+
+ /**
+ * 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_PARAM_STATIC_STRINGS));
+
+ 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_PARAM_STATIC_STRINGS));
+ 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_PARAM_STATIC_STRINGS));
+
+ 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_PARAM_STATIC_STRINGS));
+ 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_PARAM_STATIC_STRINGS));
+ 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_PARAM_STATIC_STRINGS));
+
+ 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_PARAM_STATIC_STRINGS));
+ 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_PARAM_STATIC_STRINGS));
+ 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_PARAM_STATIC_STRINGS));
+
+ 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 | G_PARAM_STATIC_STRINGS));
+#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_PARAM_STATIC_STRINGS));
+ 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 | G_PARAM_STATIC_STRINGS));
+#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_PARAM_STATIC_STRINGS));
+ 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_PARAM_STATIC_STRINGS));
+ 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_PARAM_STATIC_STRINGS));
+ 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_PARAM_STATIC_STRINGS));
+ 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_PARAM_STATIC_STRINGS));
+
+ 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_PARAM_STATIC_STRINGS));
+ 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 | G_PARAM_STATIC_STRINGS));
+
+ g_object_class_install_property (gobject_class, PROP_QOS_DSCP,
+ g_param_spec_int ("qos-dscp", "QoS diff srv code point",
+ "Quality of Service, differentiated services code point (-1 default)",
+ -1, 63, DEFAULT_QOS_DSCP,
+ G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
+ /**
+ * GstMultiFdSink::handle-read
+ *
+ * Handle read requests from clients and discard the data.
+ *
+ * Since: 0.10.23
+ */
+ g_object_class_install_property (gobject_class, PROP_HANDLE_READ,
+ g_param_spec_boolean ("handle-read", "Handle Read",
+ "Handle client reads and discard the data",
+ DEFAULT_HANDLE_READ, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
+ /**
+ * GstMultiFdSink::resend-streamheader
+ *
+ * Resend the streamheaders to existing clients when they change.
+ *
+ * Since: 0.10.23
+ */
+ g_object_class_install_property (gobject_class, PROP_RESEND_STREAMHEADER,
+ g_param_spec_boolean ("resend-streamheader", "Resend streamheader",
+ "Resend the streamheader if it changes in the caps",
+ DEFAULT_RESEND_STREAMHEADER,
+ G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
+
+ g_object_class_install_property (gobject_class, PROP_NUM_FDS,
+ g_param_spec_uint ("num-fds", "Number of fds",
+ "The current number of client file descriptors.",
+ 0, G_MAXUINT, 0, G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
+
+ /**
+ * 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
+ * @sync: the sync method to use
+ * @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_ENUM_INT_UINT64_INT_UINT64, G_TYPE_NONE, 6,
+ G_TYPE_INT, GST_TYPE_SYNC_METHOD, 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->qos_dscp = DEFAULT_QOS_DSCP;
+ this->handle_read = DEFAULT_HANDLE_READ;
+
+ this->resend_streamheader = DEFAULT_RESEND_STREAMHEADER;
+
+ 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);
+}
+
+static gint
+setup_dscp_client (GstMultiFdSink * sink, GstTCPClient * client)
+{
+ gint tos;
+ gint ret;
+ union gst_sockaddr
+ {
+ struct sockaddr sa;
+ struct sockaddr_in6 sa_in6;
+ struct sockaddr_storage sa_stor;
+ } sa;
+ socklen_t slen = sizeof (sa);
+ gint af;
+
+ /* don't touch */
+ if (sink->qos_dscp < 0)
+ return 0;
+
+ if ((ret = getsockname (client->fd.fd, &sa.sa, &slen)) < 0) {
+ GST_DEBUG_OBJECT (sink, "could not get sockname: %s", g_strerror (errno));
+ return ret;
+ }
+
+ af = sa.sa.sa_family;
+
+ /* if this is an IPv4-mapped address then do IPv4 QoS */
+ if (af == AF_INET6) {
+
+ GST_DEBUG_OBJECT (sink, "check IP6 socket");
+ if (IN6_IS_ADDR_V4MAPPED (&(sa.sa_in6.sin6_addr))) {
+ GST_DEBUG_OBJECT (sink, "mapped to IPV4");
+ af = AF_INET;
+ }
+ }
+
+ /* extract and shift 6 bits of the DSCP */
+ tos = (sink->qos_dscp & 0x3f) << 2;
+
+ switch (af) {
+ case AF_INET:
+ ret = setsockopt (client->fd.fd, IPPROTO_IP, IP_TOS, &tos, sizeof (tos));
+ break;
+ case AF_INET6:
+#ifdef IPV6_TCLASS
+ ret =
+ setsockopt (client->fd.fd, IPPROTO_IPV6, IPV6_TCLASS, &tos,
+ sizeof (tos));
+ break;
+#endif
+ default:
+ ret = 0;
+ GST_ERROR_OBJECT (sink, "unsupported AF");
+ break;
+ }
+ if (ret)
+ GST_DEBUG_OBJECT (sink, "could not set DSCP: %s", g_strerror (errno));
+
+ return ret;
+}
+
+
+static void
+setup_dscp (GstMultiFdSink * sink)
+{
+ GList *clients, *next;
+
+ CLIENTS_LOCK (sink);
+ for (clients = sink->clients; clients; clients = next) {
+ GstTCPClient *client;
+
+ client = (GstTCPClient *) clients->data;
+ next = g_list_next (clients);
+
+ setup_dscp_client (sink, client);
+ }
+ CLIENTS_UNLOCK (sink);
+}
+
+/* "add-full" signal implementation */
+void
+gst_multi_fd_sink_add_full (GstMultiFdSink * sink, int fd,
+ GstSyncMethod sync_method, GstTCPUnitType min_unit, guint64 min_value,
+ GstTCPUnitType max_unit, guint64 max_value)
+{
+ GstTCPClient *client;
+ GList *clink;
+ GTimeVal now;
+ gint flags;
+ 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->first_buffer_ts = GST_CLOCK_TIME_NONE;
+ client->last_buffer_ts = GST_CLOCK_TIME_NONE;
+ 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 */
+ if (fcntl (fd, F_SETFL, O_NONBLOCK) < 0) {
+ GST_ERROR_OBJECT (sink, "failed to make socket %d non-blocking: %s", fd,
+ g_strerror (errno));
+ }
+
+ /* we always read from a client */
+ gst_poll_add_fd (sink->fdset, &client->fd);
+
+ /* we don't try to read from write only fds */
+ if (sink->handle_read) {
+ 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 */
+ if (fstat (fd, &statbuf) == 0 && S_ISSOCK (statbuf.st_mode)) {
+ client->is_socket = TRUE;
+ setup_dscp_client (sink, client);
+ }
+
+ 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 */
+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 */
+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 */
+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 */
+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
+ * guint64 : timestamp of the first buffer sent (in nanoseconds)
+ * guint64 : timestamp of the last buffer sent (in nanoseconds)
+ */
+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 (7);
+
+ 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);
+ g_value_unset (&value);
+ g_value_init (&value, G_TYPE_UINT64);
+ g_value_set_uint64 (&value, client->first_buffer_ts);
+ 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_buffer_ts);
+ 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 */
+ if (!sink->resend_streamheader) {
+ GST_DEBUG_OBJECT (sink,
+ "[fd %5d] asked to not resend the streamheader, not sending",
+ client->fd.fd);
+ send_streamheader = FALSE;
+ } else {
+ 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_TCP_UNIT_TYPE_BUFFERS:
+ return max;
+ case GST_TCP_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_TCP_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 (GstTCPUnitType 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_TCP_UNIT_TYPE_BUFFERS:
+ *buffers = (gint) value;
+ break;
+ case GST_TCP_UNIT_TYPE_TIME:
+ *time = value;
+ break;
+ case GST_TCP_UNIT_TYPE_BYTES:
+ *bytes = (gint) value;
+ break;
+ case GST_TCP_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,
+ GstTCPUnitType min_unit, guint64 min_value, gint * max_idx,
+ GstTCPUnitType 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:
+ {
+ 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 */
+ 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:
+ {
+ 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 */
+ 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;
+ GstClockTime timestamp;
+
+ /* 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--;
+
+ /* update stats */
+ timestamp = GST_BUFFER_TIMESTAMP (buf);
+ if (client->first_buffer_ts == GST_CLOCK_TIME_NONE)
+ client->first_buffer_ts = timestamp;
+ if (timestamp != -1)
+ client->last_buffer_ts = timestamp;
+
+ /* 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 > 0) {
+ limit = MIN (limit, soft_max_buffers);
+ }
+ GST_LOG_OBJECT (sink,
+ "extending queue to include sync point, now at %d, limit is %d",
+ max_buffer_usage, limit);
+ 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, sink->timeout != 0 ? sink->timeout :
+ GST_CLOCK_TIME_NONE);
+
+ /* Handle the special case in which the sink is not receiving more buffers
+ * and will not disconnect innactive client in the streaming thread. */
+ if (G_UNLIKELY (result == 0)) {
+ GstClockTime now;
+ GTimeVal nowtv;
+
+ g_get_current_time (&nowtv);
+ now = GST_TIMEVAL_TO_TIME (nowtv);
+
+ CLIENTS_LOCK (sink);
+ for (clients = sink->clients; clients; clients = next) {
+ GstTCPClient *client;
+
+ client = (GstTCPClient *) clients->data;
+ next = g_list_next (clients);
+ if (sink->timeout > 0
+ && now - client->last_activity_time > sink->timeout) {
+ client->status = GST_CLIENT_STATUS_SLOW;
+ gst_multi_fd_sink_remove_client_link (sink, clients);
+ }
+ }
+ CLIENTS_UNLOCK (sink);
+ return;
+ } else 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;
+ /* releases the CLIENTS lock */
+ 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;
+ case PROP_QOS_DSCP:
+ multifdsink->qos_dscp = g_value_get_int (value);
+ setup_dscp (multifdsink);
+ break;
+ case PROP_HANDLE_READ:
+ multifdsink->handle_read = g_value_get_boolean (value);
+ break;
+ case PROP_RESEND_STREAMHEADER:
+ multifdsink->resend_streamheader = g_value_get_boolean (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;
+ case PROP_QOS_DSCP:
+ g_value_set_int (value, multifdsink->qos_dscp);
+ break;
+ case PROP_HANDLE_READ:
+ g_value_set_boolean (value, multifdsink->handle_read);
+ break;
+ case PROP_RESEND_STREAMHEADER:
+ g_value_set_boolean (value, multifdsink->resend_streamheader);
+ break;
+ case PROP_NUM_FDS:
+ g_value_set_uint (value, g_hash_table_size (multifdsink->fd_hash));
+ 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;
+ }
+}
projects / mafwsubrenderer / blobdiff