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gstreamer/gst/tcp/gstmultioutputsink.c
Tim-Philipp Müller 37aa31379f tcp: don't use soon-to-be-deprecated g_cancellable_reset() 
From the API documentation: "Note that it is generally not
a good idea to reuse an existing cancellable for more
operations after it has been cancelled once, as this
function might tempt you to do. The recommended practice
is to drop the reference to a cancellable after cancelling
it, and let it die with the outstanding async operations.
You should create a fresh cancellable for further async
operations."

https://bugzilla.gnome.org/show_bug.cgi?id=739132
2015-05-19 18:50:41 +01:00

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/* 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>
* Copyright (C) <2011> Collabora Ltd.
* Author: Sebastian Dröge <sebastian.droege@collabora.co.uk>
*
* 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., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
/**
* SECTION:element-multioutputsink
* @see_also: tcpserversink
*
* This plugin writes incoming data to a set of file descriptors. The
* file descriptors can be added to multioutputsink by emitting the #GstMultiOutputSink::add signal.
* For each descriptor added, the #GstMultiOutputSink::client-added signal will be called.
*
* A client can also be added with the #GstMultiOutputSink::add-full signal
* that allows for more control over what and how much data a client
* initially receives.
*
* Clients can be removed from multioutputsink by emitting the #GstMultiOutputSink::remove signal. For
* each descriptor removed, the #GstMultiOutputSink::client-removed signal will be called. The
* #GstMultiOutputSink::client-removed signal can also be fired when multioutputsink decides that a
* client is not active anymore or, depending on the value of the
* #GstMultiOutputSink:recover-policy property, if the client is reading too slowly.
* In all cases, multioutputsink will never close a file descriptor itself.
* The user of multioutputsink is responsible for closing all file descriptors.
* This can for example be done in response to the #GstMultiOutputSink::client-fd-removed signal.
* Note that multioutputsink still has a reference to the file descriptor when the
* #GstMultiOutputSink::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 #GstMultiOutputSink::client-removed signal handler, and you should use the
* #GstMultiOutputSink::client-fd-removed signal to safely close the fd.
*
* Multioutputsink 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 multioutputsink, the #GstMultiOutputSink: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
* multioutputsink (which can take some time depending on the keyframe rate), or the
* last received keyframe (which will cause a simple burst-on-connect).
* Multioutputsink will always keep at least one keyframe in its internal buffers
* when the sync-mode is set to latest-keyframe.
*
* There are additional values for the #GstMultiOutputSink: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.
*
* Multioutputsink can be instructed to keep at least a minimum amount of data
* expressed in time or byte units in its internal queues with the
* #GstMultiOutputSink:time-min and #GstMultiOutputSink:bytes-min properties respectively.
* These properties are useful if the application adds clients with the
* #GstMultiOutputSink::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 multioutputsink receives data. If the client is reading too
* fast, no data will be send to the client until multioutputsink receives more
* data. If the client, however, reads too slowly, data for that client will be
* queued up in multioutputsink. Two properties control the amount of data
* (buffers) that is queued in multioutputsink: #GstMultiOutputSink:buffers-max and
* #GstMultiOutputSink:buffers-soft-max. A client that falls behind by
* #GstMultiOutputSink:buffers-max is removed from multioutputsink forcibly.
*
* A client with a lag of at least #GstMultiOutputSink:buffers-soft-max enters the recovery
* procedure which is controlled with the #GstMultiOutputSink: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.
*
* multioutputsink 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. Multioutputsink will by default not do QoS and will never
* drop late buffers.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <gst/gst-i18n-plugin.h>
#include "gstmultioutputsink.h"
#include "gsttcp-marshal.h"
#ifndef G_OS_WIN32
#include <netinet/in.h>
#endif
#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 (multioutputsink_debug);
#define GST_CAT_DEFAULT (multioutputsink_debug)
/* MultiOutputSink 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_OUTPUT_REMOVED,
LAST_SIGNAL
};
/* this is really arbitrarily chosen */
#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_FORMAT_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_FORMAT GST_FORMAT_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_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_FORMAT,
PROP_BURST_VALUE,
PROP_QOS_DSCP,
PROP_HANDLE_READ,
PROP_RESEND_STREAMHEADER,
PROP_NUM_OUTPUTS
};
#define GST_TYPE_RECOVER_POLICY (gst_multi_output_sink_recover_policy_get_type())
static GType
gst_multi_output_sink_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 ("GstMultiOutputSinkRecoverPolicy",
recover_policy);
}
return recover_policy_type;
}
#define GST_TYPE_SYNC_METHOD (gst_multi_output_sink_sync_method_get_type())
static GType
gst_multi_output_sink_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 ("GstMultiOutputSinkSyncMethod", sync_method);
}
return sync_method_type;
}
#define GST_TYPE_CLIENT_STATUS (gst_multi_output_sink_client_status_get_type())
static GType
gst_multi_output_sink_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 ("GstMultiOutputSinkClientStatus",
client_status);
}
return client_status_type;
}
static void gst_multi_output_sink_finalize (GObject * object);
static void gst_multi_output_sink_remove_client_link (GstMultiOutputSink * sink,
GList * link);
static gboolean gst_multi_output_sink_output_condition (GstOutput * output,
GIOCondition condition, GstMultiOutputSink * sink);
static GstFlowReturn gst_multi_output_sink_render (GstBaseSink * bsink,
GstBuffer * buf);
#if 0
static gboolean gst_multi_output_sink_unlock (GstBaseSink * bsink);
static gboolean gst_multi_output_sink_unlock_stop (GstBaseSink * bsink);
#endif
static GstStateChangeReturn gst_multi_output_sink_change_state (GstElement *
element, GstStateChange transition);
static void gst_multi_output_sink_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec);
static void gst_multi_output_sink_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec);
#define gst_multi_output_sink_parent_class parent_class
G_DEFINE_TYPE (GstMultiOutputSink, gst_multi_output_sink, GST_TYPE_BASE_SINK);
static guint gst_multi_output_sink_signals[LAST_SIGNAL] = { 0 };
static void
gst_multi_output_sink_class_init (GstMultiOutputSinkClass * 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_output_sink_set_property;
gobject_class->get_property = gst_multi_output_sink_get_property;
gobject_class->finalize = gst_multi_output_sink_finalize;
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_FORMAT, 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_FORMAT,
g_param_spec_enum ("burst-format", "Burst format",
"The format of the burst units (when sync-method is burst[[-with]-keyframe])",
GST_TYPE_FORMAT, DEFAULT_BURST_FORMAT,
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));
/**
* GstMultiOutputSink::handle-read
*
* Handle read requests from clients and discard the data.
*/
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));
/**
* GstMultiOutputSink::resend-streamheader
*
* Resend the streamheaders to existing clients when they change.
*/
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_OUTPUTS,
g_param_spec_uint ("num-outputs", "Number of outputs",
"The current number of client outputs",
0, G_MAXUINT, 0, G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
/**
* GstMultiOutputSink::add:
* @gstmultioutputsink: the multioutputsink element to emit this signal on
* @output: the output to add to multioutputsink
*
* Hand the given open output to multioutputsink to write to.
*/
gst_multi_output_sink_signals[SIGNAL_ADD] =
g_signal_new ("add", G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
G_STRUCT_OFFSET (GstMultiOutputSinkClass, add), NULL, NULL,
g_cclosure_marshal_VOID__OBJECT, G_TYPE_NONE, 1, G_TYPE_OUTPUT);
/**
* GstMultiOutputSink::add-full:
* @gstmultioutputsink: the multioutputsink element to emit this signal on
* @output: the output to add to multioutputsink
* @sync: the sync method to use
* @format_min: the format of @value_min
* @value_min: the minimum amount of data to burst expressed in
* @format_min units.
* @format_max: the format of @value_max
* @value_max: the maximum amount of data to burst expressed in
* @format_max units.
*
* Hand the given open output to multioutputsink to write to and
* specify the burst parameters for the new connection.
*/
gst_multi_output_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 (GstMultiOutputSinkClass, add_full), NULL, NULL,
gst_tcp_marshal_VOID__OBJECT_ENUM_ENUM_UINT64_ENUM_UINT64, G_TYPE_NONE, 6,
G_TYPE_OUTPUT, GST_TYPE_SYNC_METHOD, GST_TYPE_FORMAT, G_TYPE_UINT64,
GST_TYPE_FORMAT, G_TYPE_UINT64);
/**
* GstMultiOutputSink::remove:
* @gstmultioutputsink: the multioutputsink element to emit this signal on
* @output: the output to remove from multioutputsink
*
* Remove the given open output from multioutputsink.
*/
gst_multi_output_sink_signals[SIGNAL_REMOVE] =
g_signal_new ("remove", G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
G_STRUCT_OFFSET (GstMultiOutputSinkClass, remove), NULL, NULL,
g_cclosure_marshal_VOID__OBJECT, G_TYPE_NONE, 1, G_TYPE_OUTPUT);
/**
* GstMultiOutputSink::remove-flush:
* @gstmultioutputsink: the multioutputsink element to emit this signal on
* @output: the output to remove from multioutputsink
*
* Remove the given open output from multioutputsink after flushing all
* the pending data to the output.
*/
gst_multi_output_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 (GstMultiOutputSinkClass, remove_flush), NULL, NULL,
g_cclosure_marshal_VOID__OBJECT, G_TYPE_NONE, 1, G_TYPE_OUTPUT);
/**
* GstMultiOutputSink::clear:
* @gstmultioutputsink: the multioutputsink element to emit this signal on
*
* Remove all outputs from multioutputsink. Since multioutputsink did not
* open outputs itself, it does not explicitly close the outputs. The application
* should do so by connecting to the client-output-removed callback.
*/
gst_multi_output_sink_signals[SIGNAL_CLEAR] =
g_signal_new ("clear", G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
G_STRUCT_OFFSET (GstMultiOutputSinkClass, clear), NULL, NULL,
g_cclosure_marshal_VOID__VOID, G_TYPE_NONE, 0);
/**
* GstMultiOutputSink::get-stats:
* @gstmultioutputsink: the multioutputsink element to emit this signal on
* @output: the output to get stats of from multioutputsink
*
* Get statistics about @output. This function returns a GstStructure.
*
* Returns: a GstStructure with the statistics. The structure contains
* values that represent: 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).
*/
gst_multi_output_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 (GstMultiOutputSinkClass, get_stats), NULL, NULL,
gst_tcp_marshal_BOXED__OBJECT, GST_TYPE_STRUCTURE, 1, G_TYPE_OUTPUT);
/**
* GstMultiOutputSink::client-added:
* @gstmultioutputsink: the multioutputsink element that emitted this signal
* @output: the output that was added to multioutputsink
*
* The given output was added to multioutputsink. This signal will
* be emitted from the streaming thread so application should be prepared
* for that.
*/
gst_multi_output_sink_signals[SIGNAL_CLIENT_ADDED] =
g_signal_new ("client-added", G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_LAST, G_STRUCT_OFFSET (GstMultiOutputSinkClass,
client_added), NULL, NULL, g_cclosure_marshal_VOID__OBJECT,
G_TYPE_NONE, 1, G_TYPE_OBJECT);
/**
* GstMultiOutputSink::client-removed:
* @gstmultioutputsink: the multioutputsink element that emitted this signal
* @output: the output that is to be removed from multioutputsink
* @status: the reason why the client was removed
*
* The given output is about to be removed from multioutputsink. This
* signal will be emitted from the streaming thread so applications should
* be prepared for that.
*
* @gstmultioutputsink still holds a handle to @output 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 @output in this callback.
*/
gst_multi_output_sink_signals[SIGNAL_CLIENT_REMOVED] =
g_signal_new ("client-removed", G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_LAST, G_STRUCT_OFFSET (GstMultiOutputSinkClass,
client_removed), NULL, NULL, gst_tcp_marshal_VOID__OBJECT_ENUM,
G_TYPE_NONE, 2, G_TYPE_INT, GST_TYPE_CLIENT_STATUS);
/**
* GstMultiOutputSink::client-output-removed:
* @gstmultioutputsink: the multioutputsink element that emitted this signal
* @output: the output that was removed from multioutputsink
*
* The given output was removed from multioutputsink. This signal will
* be emitted from the streaming thread so applications should be prepared
* for that.
*
* In this callback, @gstmultioutputsink has removed all the information
* associated with @output and it is therefore not possible to call get-stats
* with @output. It is however safe to close() and reuse @fd in the callback.
*/
gst_multi_output_sink_signals[SIGNAL_CLIENT_OUTPUT_REMOVED] =
g_signal_new ("client-output-removed", G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_LAST, G_STRUCT_OFFSET (GstMultiOutputSinkClass,
client_output_removed), NULL, NULL, g_cclosure_marshal_VOID__OBJECT,
G_TYPE_NONE, 1, G_TYPE_OUTPUT);
gst_element_class_add_pad_template (gstelement_class,
gst_static_pad_template_get (&sinktemplate));
gst_element_class_set_static_metadata (gstelement_class,
"Multi output sink", "Sink/Network",
"Send data to multiple outputs",
"Thomas Vander Stichele <thomas at apestaart dot org>, "
"Wim Taymans <wim@fluendo.com>, "
"Sebastian Dröge <sebastian.droege@collabora.co.uk>");
gstelement_class->change_state =
GST_DEBUG_FUNCPTR (gst_multi_output_sink_change_state);
gstbasesink_class->render = GST_DEBUG_FUNCPTR (gst_multi_output_sink_render);
#if 0
gstbasesink_class->unlock = GST_DEBUG_FUNCPTR (gst_multi_output_sink_unlock);
gstbasesink_class->unlock_stop =
GST_DEBUG_FUNCPTR (gst_multi_output_sink_unlock_stop);
#endif
klass->add = GST_DEBUG_FUNCPTR (gst_multi_output_sink_add);
klass->add_full = GST_DEBUG_FUNCPTR (gst_multi_output_sink_add_full);
klass->remove = GST_DEBUG_FUNCPTR (gst_multi_output_sink_remove);
klass->remove_flush = GST_DEBUG_FUNCPTR (gst_multi_output_sink_remove_flush);
klass->clear = GST_DEBUG_FUNCPTR (gst_multi_output_sink_clear);
klass->get_stats = GST_DEBUG_FUNCPTR (gst_multi_output_sink_get_stats);
GST_DEBUG_CATEGORY_INIT (multioutputsink_debug, "multioutputsink", 0,
"Multi output sink");
}
static void
gst_multi_output_sink_init (GstMultiOutputSink * this)
{
GST_OBJECT_FLAG_UNSET (this, GST_MULTI_OUTPUT_SINK_OPEN);
CLIENTS_LOCK_INIT (this);
this->clients = NULL;
this->output_hash = g_hash_table_new (g_direct_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_format = DEFAULT_BURST_FORMAT;
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;
#if 0
this->cancellable = g_cancellable_new ();
#endif
}
static void
gst_multi_output_sink_finalize (GObject * object)
{
GstMultiOutputSink *this;
this = GST_MULTI_OUTPUT_SINK (object);
CLIENTS_LOCK_CLEAR (this);
g_hash_table_destroy (this->output_hash);
g_array_free (this->bufqueue, TRUE);
if (this->cancellable) {
g_object_unref (this->cancellable);
this->cancellable = NULL;
}
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static gint
setup_dscp_client (GstMultiOutputSink * sink, GstOutputClient * client)
{
#ifndef IP_TOS
return 0;
#else
gint tos;
gint ret;
int fd;
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;
fd = g_output_get_fd (client->output);
if ((ret = getsockname (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 output");
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 (fd, IPPROTO_IP, IP_TOS, &tos, sizeof (tos));
break;
case AF_INET6:
#ifdef IPV6_TCLASS
ret = setsockopt (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;
#endif
}
static void
setup_dscp (GstMultiOutputSink * sink)
{
GList *clients;
CLIENTS_LOCK (sink);
for (clients = sink->clients; clients; clients = clients->next) {
GstOutputClient *client;
client = clients->data;
setup_dscp_client (sink, client);
}
CLIENTS_UNLOCK (sink);
}
/* "add-full" signal implementation */
void
gst_multi_output_sink_add_full (GstMultiOutputSink * sink, GstOutput * output,
GstSyncMethod sync_method, GstFormat min_format, guint64 min_value,
GstFormat max_format, guint64 max_value)
{
GstOutputClient *client;
GList *clink;
GTimeVal now;
GST_DEBUG_OBJECT (sink, "[output %p] adding client, sync_method %d, "
"min_format %d, min_value %" G_GUINT64_FORMAT
", max_format %d, max_value %" G_GUINT64_FORMAT, output,
sync_method, min_format, min_value, max_format, max_value);
/* do limits check if we can */
if (min_format == max_format) {
if (max_value != -1 && min_value != -1 && max_value < min_value)
goto wrong_limits;
}
/* create client datastructure */
client = g_new0 (GstOutputClient, 1);
client->output = G_OUTPUT (g_object_ref (output));
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_format = min_format;
client->burst_min_value = min_value;
client->burst_max_format = max_format;
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->output_hash, output);
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->output_hash, output, clink);
sink->clients_cookie++;
/* set the output to non blocking */
g_output_set_blocking (output, FALSE);
/* we always read from a client */
if (sink->main_context) {
client->source =
g_output_create_source (client->output,
G_IO_IN | G_IO_OUT | G_IO_PRI | G_IO_ERR | G_IO_HUP, sink->cancellable);
g_source_set_callback (client->source,
(GSourceFunc) gst_multi_output_sink_output_condition,
gst_object_ref (sink), (GDestroyNotify) gst_object_unref);
g_source_attach (client->source, sink->main_context);
}
setup_dscp_client (sink, client);
CLIENTS_UNLOCK (sink);
g_signal_emit (G_OBJECT (sink),
gst_multi_output_sink_signals[SIGNAL_CLIENT_ADDED], 0, output);
return;
/* errors */
wrong_limits:
{
GST_WARNING_OBJECT (sink,
"[output %p] wrong values min =%" G_GUINT64_FORMAT ", max=%"
G_GUINT64_FORMAT ", format %d specified when adding client", output,
min_value, max_value, min_format);
return;
}
duplicate:
{
client->status = GST_CLIENT_STATUS_DUPLICATE;
CLIENTS_UNLOCK (sink);
GST_WARNING_OBJECT (sink, "[output %p] duplicate client found, refusing",
output);
g_signal_emit (G_OBJECT (sink),
gst_multi_output_sink_signals[SIGNAL_CLIENT_REMOVED], 0, output,
client->status);
g_free (client);
return;
}
}
/* "add" signal implementation */
void
gst_multi_output_sink_add (GstMultiOutputSink * sink, GstOutput * output)
{
gst_multi_output_sink_add_full (sink, output, sink->def_sync_method,
sink->def_burst_format, sink->def_burst_value, sink->def_burst_format,
-1);
}
/* "remove" signal implementation */
void
gst_multi_output_sink_remove (GstMultiOutputSink * sink, GstOutput * output)
{
GList *clink;
GST_DEBUG_OBJECT (sink, "[output %p] removing client", output);
CLIENTS_LOCK (sink);
clink = g_hash_table_lookup (sink->output_hash, output);
if (clink != NULL) {
GstOutputClient *client = clink->data;
if (client->status != GST_CLIENT_STATUS_OK) {
GST_INFO_OBJECT (sink,
"[output %p] Client already disconnecting with status %d",
output, client->status);
goto done;
}
client->status = GST_CLIENT_STATUS_REMOVED;
gst_multi_output_sink_remove_client_link (sink, clink);
} else {
GST_WARNING_OBJECT (sink, "[output %p] no client with this output found!",
output);
}
done:
CLIENTS_UNLOCK (sink);
}
/* "remove-flush" signal implementation */
void
gst_multi_output_sink_remove_flush (GstMultiOutputSink * sink,
GstOutput * output)
{
GList *clink;
GST_DEBUG_OBJECT (sink, "[output %p] flushing client", output);
CLIENTS_LOCK (sink);
clink = g_hash_table_lookup (sink->output_hash, output);
if (clink != NULL) {
GstOutputClient *client = clink->data;
if (client->status != GST_CLIENT_STATUS_OK) {
GST_INFO_OBJECT (sink,
"[output %p] Client already disconnecting with status %d",
output, 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, "[output %p] no client with this fd found!",
output);
}
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_output_sink_clear (GstMultiOutputSink * sink)
{
GList *clients;
guint32 cookie;
GST_DEBUG_OBJECT (sink, "clearing all clients");
CLIENTS_LOCK (sink);
restart:
cookie = sink->clients_cookie;
for (clients = sink->clients; clients; clients = clients->next) {
GstOutputClient *client;
if (cookie != sink->clients_cookie) {
GST_DEBUG_OBJECT (sink, "cookie changed while removing all clients");
goto restart;
}
client = clients->data;
client->status = GST_CLIENT_STATUS_REMOVED;
gst_multi_output_sink_remove_client_link (sink, clients);
}
CLIENTS_UNLOCK (sink);
}
/* "get-stats" signal implementation
*/
GstStructure *
gst_multi_output_sink_get_stats (GstMultiOutputSink * sink, GstOutput * output)
{
GstOutputClient *client;
GstStructure *result = NULL;
GList *clink;
CLIENTS_LOCK (sink);
clink = g_hash_table_lookup (sink->output_hash, output);
if (clink == NULL)
goto noclient;
client = clink->data;
if (client != NULL) {
guint64 interval;
result = gst_structure_new_empty ("multioutputsink-stats");
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;
}
gst_structure_set (result,
"bytes-sent", G_TYPE_UINT64, client->bytes_sent,
"connect-time", G_TYPE_UINT64, client->connect_time,
"disconnect-time", G_TYPE_UINT64, client->disconnect_time,
"connected-duration", G_TYPE_UINT64, interval,
"last-activatity-time", G_TYPE_UINT64, client->last_activity_time,
"dropped-buffers", G_TYPE_UINT64, client->dropped_buffers,
"first-buffer-ts", G_TYPE_UINT64, client->first_buffer_ts,
"last-buffer-ts", G_TYPE_UINT64, client->last_buffer_ts, NULL);
}
noclient:
CLIENTS_UNLOCK (sink);
/* python doesn't like a NULL pointer yet */
if (result == NULL) {
GST_WARNING_OBJECT (sink, "[output %p] no client with this found!", output);
result = gst_structure_new_empty ("multioutputsink-stats");
}
return result;
}
/* should be called with the clientslock held.
* 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_output_sink_remove_client_link (GstMultiOutputSink * sink,
GList * link)
{
GstOutput *output;
GTimeVal now;
GstOutputClient *client = link->data;
GstMultiOutputSinkClass *fclass;
fclass = GST_MULTI_OUTPUT_SINK_GET_CLASS (sink);
output = client->output;
if (client->currently_removing) {
GST_WARNING_OBJECT (sink, "[output %p] client is already being removed",
output);
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, "[output %p] removing client %p for no reason",
output, client);
break;
case GST_CLIENT_STATUS_CLOSED:
GST_DEBUG_OBJECT (sink, "[output %p] removing client %p because of close",
output, client);
break;
case GST_CLIENT_STATUS_REMOVED:
GST_DEBUG_OBJECT (sink,
"[output %p] removing client %p because the app removed it", output,
client);
break;
case GST_CLIENT_STATUS_SLOW:
GST_INFO_OBJECT (sink,
"[output %p] removing client %p because it was too slow", output,
client);
break;
case GST_CLIENT_STATUS_ERROR:
GST_WARNING_OBJECT (sink,
"[output %p] removing client %p because of error", output, client);
break;
case GST_CLIENT_STATUS_FLUSHING:
default:
GST_WARNING_OBJECT (sink,
"[output %p] removing client %p with invalid reason %d", output,
client, client->status);
break;
}
/* FIXME: convert to vfunc to cleanup a client */
fclass->delete_client (sink, client);
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_output_sink_signals[SIGNAL_CLIENT_REMOVED], 0, output,
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->output_hash, output)) {
GST_WARNING_OBJECT (sink,
"[output %p] error removing client %p from hash", output, 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, output);
g_free (client);
CLIENTS_UNLOCK (sink);
/* and the fd is really gone now */
g_signal_emit (G_OBJECT (sink),
gst_multi_output_sink_signals[SIGNAL_CLIENT_OUTPUT_REMOVED], 0, output);
g_object_unref (output);
CLIENTS_LOCK (sink);
}
/* handle a read on a client output,
* which either indicates a close or should be ignored
* returns FALSE if some error occured or the client closed. */
static gboolean
gst_multi_output_sink_handle_client_read (GstMultiOutputSink * sink,
GstOutputClient * client)
{
gboolean ret;
gchar dummy[256];
gssize nread;
GError *err = NULL;
gboolean first = TRUE;
GST_DEBUG_OBJECT (sink, "[output %p] select reports client read",
client->output);
ret = TRUE;
/* just Read 'n' Drop, could also just drop the client as it's not supposed
* to write to us except for closing the output, I guess it's because we
* like to listen to our customers. */
do {
gssize navail;
GST_DEBUG_OBJECT (sink, "[output %p] client wants us to read",
client->output);
navail = g_output_get_available_bytes (client->output);
if (navail < 0)
break;
nread =
g_output_receive (client->output, dummy, MIN (navail, sizeof (dummy)),
sink->cancellable, &err);
if (first && nread == 0) {
/* client sent close, so remove it */
GST_DEBUG_OBJECT (sink, "[output %p] client asked for close, removing",
client->output);
client->status = GST_CLIENT_STATUS_CLOSED;
ret = FALSE;
} else if (nread < 0) {
GST_WARNING_OBJECT (sink, "[output %p] could not read: %s",
client->output, err->message);
client->status = GST_CLIENT_STATUS_ERROR;
ret = FALSE;
break;
}
first = FALSE;
} while (nread > 0);
g_clear_error (&err);
return ret;
}
static gboolean
is_sync_frame (GstMultiOutputSink * 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;
}
#if 0
/* queue the given buffer for the given client */
static gboolean
gst_multi_output_sink_client_queue_buffer (GstMultiOutputSink * sink,
GstOutputClient * 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_pad_get_current_caps (GST_BASE_SINK_PAD (sink));
if (!client->caps) {
GST_DEBUG_OBJECT (sink,
"[output %p] no previous caps for this client, send streamheader",
client->output);
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,
"[output %p] new caps do not have streamheader, not sending",
client->output);
} 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,
"[output %p] previous caps did not have streamheader, sending",
client->output);
send_streamheader = TRUE;
} else {
/* both old and new caps have streamheader set */
if (!sink->resend_streamheader) {
GST_DEBUG_OBJECT (sink,
"[output %p] asked to not resend the streamheader, not sending",
client->output);
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,
"[output %p] new streamheader different from old, sending",
client->output);
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,
"[output %p] sending streamheader from caps %" GST_PTR_FORMAT,
client->output, caps);
s = gst_caps_get_structure (caps, 0);
if (!gst_structure_has_field (s, "streamheader")) {
GST_DEBUG_OBJECT (sink,
"[output %p] no new streamheader, so nothing to send",
client->output);
} else {
GST_LOG_OBJECT (sink,
"[output %p] sending streamheader from caps %" GST_PTR_FORMAT,
client->output, 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,
"[output %p] queueing streamheader buffer of length %"
G_GSIZE_FORMAT, client->output, gst_buffer_get_size (buffer));
gst_buffer_ref (buffer);
client->sending = g_slist_append (client->sending, buffer);
}
}
}
gst_caps_unref (caps);
caps = NULL;
GST_LOG_OBJECT (sink,
"[output %p] queueing buffer of length %" G_GSIZE_FORMAT, client->output,
gst_buffer_get_size (buffer));
gst_buffer_ref (buffer);
client->sending = g_slist_append (client->sending, buffer);
return TRUE;
}
#endif
/* 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 (GstMultiOutputSink * 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 (GstMultiOutputSink * sink, gint64 max)
{
switch (sink->unit_type) {
case GST_FORMAT_BUFFERS:
return max;
case GST_FORMAT_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_FORMAT_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_get_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 (GstMultiOutputSink * 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_get_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 (GstFormat format, guint64 value, gint * bytes, gint * buffers,
GstClockTime * time)
{
gboolean res = TRUE;
/* set only the limit of the given format to the given value */
switch (format) {
case GST_FORMAT_BUFFERS:
*buffers = (gint) value;
break;
case GST_FORMAT_TIME:
*time = value;
break;
case GST_FORMAT_BYTES:
*bytes = (gint) value;
break;
case GST_FORMAT_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 (GstMultiOutputSink * sink, gint * min_idx,
GstFormat min_format, guint64 min_value, gint * max_idx,
GstFormat max_format, 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_format, min_value, &bytes_min, &buffers_min, &time_min);
assign_value (max_format, 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_output_sink_new_client (GstMultiOutputSink * sink,
GstOutputClient * client)
{
gint result;
GST_DEBUG_OBJECT (sink,
"[output %p] new client, deciding where to start in queue",
client->output);
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,
"[output %p] SYNC_METHOD_LATEST, position %d", client->output,
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,
"[output %p] new client, bufpos %d, waiting for keyframe",
client->output, client->bufpos);
result = find_prev_syncframe (sink, client->bufpos);
if (result != -1) {
GST_DEBUG_OBJECT (sink,
"[output %p] SYNC_METHOD_NEXT_KEYFRAME: result %d",
client->output, result);
break;
}
/* client is not on a syncbuffer, need to skip these buffers and
* wait some more */
GST_LOG_OBJECT (sink,
"[output %p] new client, skipping buffer(s), no syncpoint found",
client->output);
client->bufpos = -1;
break;
}
case GST_SYNC_METHOD_LATEST_KEYFRAME:
{
GST_DEBUG_OBJECT (sink,
"[output %p] SYNC_METHOD_LATEST_KEYFRAME", client->output);
/* 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,
"[output %p] SYNC_METHOD_LATEST_KEYFRAME: result %d",
client->output, result);
break;
}
GST_DEBUG_OBJECT (sink,
"[output %p] SYNC_METHOD_LATEST_KEYFRAME: no keyframe found, "
"switching to SYNC_METHOD_NEXT_KEYFRAME", client->output);
/* 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_format,
client->burst_min_value, &max, client->burst_max_format,
client->burst_max_value);
GST_DEBUG_OBJECT (sink,
"[output %p] SYNC_METHOD_BURST: burst_unit returned %d, result %d",
client->output, 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,
"[output %p] SYNC_METHOD_BURST: result above max, taken down to %d",
client->output, 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_format,
client->burst_min_value, &max_idx, client->burst_max_format,
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_format,
client->burst_min_value, &max_idx, client->burst_max_format,
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.
*
* We first check to see if we need to send 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 output 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_output_sink_handle_client_write (GstMultiOutputSink * sink,
GstOutputClient * client)
{
GstOutput *output = client->output;
gboolean more;
gboolean flushing;
GstClockTime now;
GTimeVal nowtv;
GError *err = NULL;
g_get_current_time (&nowtv);
now = GST_TIMEVAL_TO_TIME (nowtv);
flushing = client->status == GST_CLIENT_STATUS_FLUSHING;
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 */
if (client->source) {
g_source_destroy (client->source);
g_source_unref (client->source);
client->source = NULL;
}
/* 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_output_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 */
if (client->source) {
g_source_destroy (client->source);
g_source_unref (client->source);
client->source = NULL;
}
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, "[output %p] client %p at position %d",
output, client, client->bufpos);
/* queueing a buffer will ref it */
gst_multi_output_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) {
gssize wrote;
GstBuffer *head;
GstMapInfo map;
/* pick first buffer from list */
head = GST_BUFFER (client->sending->data);
gst_buffer_map (head, &map, GST_MAP_READ);
maxsize = map.size - client->bufoffset;
/* try to write the complete buffer */
wrote =
g_output_send (output, (gchar *) map.data + client->bufoffset,
maxsize, sink->cancellable, &err);
gst_buffer_unmap (head, &map);
if (wrote < 0) {
/* hmm error.. */
if (g_error_matches (err, G_IO_ERROR, G_IO_ERROR_CLOSED)) {
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 %p of %" G_GSSIZE_FORMAT " bytes", output,
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, "[output %p] flushed, removing", output);
client->status = GST_CLIENT_STATUS_REMOVED;
return FALSE;
}
connection_reset:
{
GST_DEBUG_OBJECT (sink, "[output %p] connection reset by peer, removing",
output);
client->status = GST_CLIENT_STATUS_CLOSED;
g_clear_error (&err);
return FALSE;
}
write_error:
{
GST_WARNING_OBJECT (sink,
"[output %p] could not write, removing client: %s", output,
err->message);
g_clear_error (&err);
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_output_sink_recover_client (GstMultiOutputSink * sink,
GstOutputClient * client)
{
gint newbufpos;
GST_WARNING_OBJECT (sink,
"[output %p] client %p is lagging at %d, recover using policy %d",
client->output, 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 signaling
* the select thread that the fd_set changed.
*/
static void
gst_multi_output_sink_queue_buffer (GstMultiOutputSink * sink, GstBuffer * buf)
{
GList *clients, *next;
gint queuelen;
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 */
gst_buffer_ref (buf);
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) {
GstOutputClient *client;
if (cookie != sink->clients_cookie) {
GST_DEBUG_OBJECT (sink, "Clients cookie outdated, restarting");
goto restart;
}
client = clients->data;
next = g_list_next (clients);
client->bufpos++;
GST_LOG_OBJECT (sink, "[output %p] client %p at position %d",
client->output, 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_output_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, "[output %p] client %p position reset to %d",
client->output, client, client->bufpos);
} else {
GST_INFO_OBJECT (sink,
"[output %p] client %p not recovering position",
client->output, 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, "[output %p] client %p is too slow, removing",
client->output, 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_output_sink_remove_client_link (sink, clients);
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 */
if (!client->source) {
client->source =
g_output_create_source (client->output,
G_IO_IN | G_IO_OUT | G_IO_PRI | G_IO_ERR | G_IO_HUP,
sink->cancellable);
g_source_set_callback (client->source,
(GSourceFunc) gst_multi_output_sink_output_condition,
gst_object_ref (sink), (GDestroyNotify) gst_object_unref);
g_source_attach (client->source, sink->main_context);
}
}
/* 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);
}
/* Handle the clients. This is called when a output becomes ready
* to read or writable. Badly behaving clients are put on a
* garbage list and removed.
*/
static gboolean
gst_multi_output_sink_output_condition (GstOutput * output,
GIOCondition condition, GstMultiOutputSink * sink)
{
GList *clink;
GstOutputClient *client;
gboolean ret = TRUE;
CLIENTS_LOCK (sink);
clink = g_hash_table_lookup (sink->output_hash, output);
if (clink == NULL) {
ret = FALSE;
goto done;
}
client = clink->data;
if (client->status != GST_CLIENT_STATUS_FLUSHING
&& client->status != GST_CLIENT_STATUS_OK) {
gst_multi_output_sink_remove_client_link (sink, clink);
ret = FALSE;
goto done;
}
if ((condition & G_IO_ERR)) {
GST_WARNING_OBJECT (sink, "Output %p has error", client->output);
client->status = GST_CLIENT_STATUS_ERROR;
gst_multi_output_sink_remove_client_link (sink, clink);
ret = FALSE;
goto done;
} else if ((condition & G_IO_HUP)) {
client->status = GST_CLIENT_STATUS_CLOSED;
gst_multi_output_sink_remove_client_link (sink, clink);
ret = FALSE;
goto done;
} else if ((condition & G_IO_IN) || (condition & G_IO_PRI)) {
/* handle client read */
if (!gst_multi_output_sink_handle_client_read (sink, client)) {
gst_multi_output_sink_remove_client_link (sink, clink);
ret = FALSE;
goto done;
}
} else if ((condition & G_IO_OUT)) {
/* handle client write */
if (!gst_multi_output_sink_handle_client_write (sink, client)) {
gst_multi_output_sink_remove_client_link (sink, clink);
ret = FALSE;
goto done;
}
}
done:
CLIENTS_UNLOCK (sink);
return ret;
}
static gboolean
gst_multi_output_sink_timeout (GstMultiOutputSink * sink)
{
GstClockTime now;
GTimeVal nowtv;
GList *clients;
g_get_current_time (&nowtv);
now = GST_TIMEVAL_TO_TIME (nowtv);
CLIENTS_LOCK (sink);
for (clients = sink->clients; clients; clients = clients->next) {
GstOutputClient *client;
client = clients->data;
if (sink->timeout > 0 && now - client->last_activity_time > sink->timeout) {
client->status = GST_CLIENT_STATUS_SLOW;
gst_multi_output_sink_remove_client_link (sink, clients);
}
}
CLIENTS_UNLOCK (sink);
return FALSE;
}
/* 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_output_sink_thread (GstMultiOutputSink * sink)
{
GSource *timeout = NULL;
while (sink->running) {
if (sink->timeout > 0) {
timeout = g_timeout_source_new (sink->timeout / GST_MSECOND);
g_source_set_callback (timeout,
(GSourceFunc) gst_multi_output_sink_timeout, gst_object_ref (sink),
(GDestroyNotify) gst_object_unref);
g_source_attach (timeout, sink->main_context);
}
/* Returns after handling all pending events or when
* _wakeup() was called. In any case we have to add
* a new timeout because something happened.
*/
g_main_context_iteration (sink->main_context, TRUE);
if (timeout) {
g_source_destroy (timeout);
g_source_unref (timeout);
}
}
return NULL;
}
static GstFlowReturn
gst_multi_output_sink_render (GstBaseSink * bsink, GstBuffer * buf)
{
GstMultiOutputSink *sink;
gboolean in_caps;
#if 0
GstCaps *bufcaps, *padcaps;
#endif
sink = GST_MULTI_OUTPUT_SINK (bsink);
g_return_val_if_fail (GST_OBJECT_FLAG_IS_SET (sink,
GST_MULTI_OUTPUT_SINK_OPEN), GST_FLOW_WRONG_STATE);
#if 0
/* 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;
#endif
/* get IN_CAPS first, code below might mess with the flags */
in_caps = GST_BUFFER_FLAG_IS_SET (buf, GST_BUFFER_FLAG_IN_CAPS);
#if 0
/* stamp the buffer with previous caps if no caps set */
if (!bufcaps) {
if (!gst_buffer_is_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_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);
}
#endif
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) {
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 %"
G_GSIZE_FORMAT " to streamheader", gst_buffer_get_size (buf));
sink->streamheader = g_slist_append (sink->streamheader, buf);
} else {
/* queue the buffer, this is a regular data buffer. */
this->class->queue_buffer (sink, buf);
sink->bytes_to_serve += gst_buffer_get_size (buf);
}
return GST_FLOW_OK;
/* ERRORS */
#if 0
no_caps:
{
GST_ELEMENT_ERROR (sink, CORE, NEGOTIATION, (NULL),
("Received first buffer without caps set"));
return GST_FLOW_NOT_NEGOTIATED;
}
#endif
}
static void
gst_multi_output_sink_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
GstMultiOutputSink *multioutputsink;
multioutputsink = GST_MULTI_OUTPUT_SINK (object);
switch (prop_id) {
case PROP_BUFFERS_MAX:
multioutputsink->units_max = g_value_get_int (value);
break;
case PROP_BUFFERS_SOFT_MAX:
multioutputsink->units_soft_max = g_value_get_int (value);
break;
case PROP_TIME_MIN:
multioutputsink->time_min = g_value_get_int64 (value);
break;
case PROP_BYTES_MIN:
multioutputsink->bytes_min = g_value_get_int (value);
break;
case PROP_BUFFERS_MIN:
multioutputsink->buffers_min = g_value_get_int (value);
break;
case PROP_UNIT_TYPE:
multioutputsink->unit_type = g_value_get_enum (value);
break;
case PROP_UNITS_MAX:
multioutputsink->units_max = g_value_get_int64 (value);
break;
case PROP_UNITS_SOFT_MAX:
multioutputsink->units_soft_max = g_value_get_int64 (value);
break;
case PROP_RECOVER_POLICY:
multioutputsink->recover_policy = g_value_get_enum (value);
break;
case PROP_TIMEOUT:
multioutputsink->timeout = g_value_get_uint64 (value);
break;
case PROP_SYNC_METHOD:
multioutputsink->def_sync_method = g_value_get_enum (value);
break;
case PROP_BURST_FORMAT:
multioutputsink->def_burst_format = g_value_get_enum (value);
break;
case PROP_BURST_VALUE:
multioutputsink->def_burst_value = g_value_get_uint64 (value);
break;
case PROP_QOS_DSCP:
multioutputsink->qos_dscp = g_value_get_int (value);
setup_dscp (multioutputsink);
break;
case PROP_HANDLE_READ:
multioutputsink->handle_read = g_value_get_boolean (value);
break;
case PROP_RESEND_STREAMHEADER:
multioutputsink->resend_streamheader = g_value_get_boolean (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_multi_output_sink_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec)
{
GstMultiOutputSink *multioutputsink;
multioutputsink = GST_MULTI_OUTPUT_SINK (object);
switch (prop_id) {
case PROP_BUFFERS_MAX:
g_value_set_int (value, multioutputsink->units_max);
break;
case PROP_BUFFERS_SOFT_MAX:
g_value_set_int (value, multioutputsink->units_soft_max);
break;
case PROP_TIME_MIN:
g_value_set_int64 (value, multioutputsink->time_min);
break;
case PROP_BYTES_MIN:
g_value_set_int (value, multioutputsink->bytes_min);
break;
case PROP_BUFFERS_MIN:
g_value_set_int (value, multioutputsink->buffers_min);
break;
case PROP_BUFFERS_QUEUED:
g_value_set_uint (value, multioutputsink->buffers_queued);
break;
case PROP_BYTES_QUEUED:
g_value_set_uint (value, multioutputsink->bytes_queued);
break;
case PROP_TIME_QUEUED:
g_value_set_uint64 (value, multioutputsink->time_queued);
break;
case PROP_UNIT_TYPE:
g_value_set_enum (value, multioutputsink->unit_type);
break;
case PROP_UNITS_MAX:
g_value_set_int64 (value, multioutputsink->units_max);
break;
case PROP_UNITS_SOFT_MAX:
g_value_set_int64 (value, multioutputsink->units_soft_max);
break;
case PROP_RECOVER_POLICY:
g_value_set_enum (value, multioutputsink->recover_policy);
break;
case PROP_TIMEOUT:
g_value_set_uint64 (value, multioutputsink->timeout);
break;
case PROP_SYNC_METHOD:
g_value_set_enum (value, multioutputsink->def_sync_method);
break;
case PROP_BYTES_TO_SERVE:
g_value_set_uint64 (value, multioutputsink->bytes_to_serve);
break;
case PROP_BYTES_SERVED:
g_value_set_uint64 (value, multioutputsink->bytes_served);
break;
case PROP_BURST_FORMAT:
g_value_set_enum (value, multioutputsink->def_burst_format);
break;
case PROP_BURST_VALUE:
g_value_set_uint64 (value, multioutputsink->def_burst_value);
break;
case PROP_QOS_DSCP:
g_value_set_int (value, multioutputsink->qos_dscp);
break;
case PROP_HANDLE_READ:
g_value_set_boolean (value, multioutputsink->handle_read);
break;
case PROP_RESEND_STREAMHEADER:
g_value_set_boolean (value, multioutputsink->resend_streamheader);
break;
case PROP_NUM_OUTPUTS:
g_value_set_uint (value,
g_hash_table_size (multioutputsink->output_hash));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
/* create a output for sending to remote machine */
static gboolean
gst_multi_output_sink_start (GstBaseSink * bsink)
{
GstMultiOutputSinkClass *fclass;
GstMultiOutputSink *this;
GList *clients;
if (GST_OBJECT_FLAG_IS_SET (bsink, GST_MULTI_OUTPUT_SINK_OPEN))
return TRUE;
this = GST_MULTI_OUTPUT_SINK (bsink);
fclass = GST_MULTI_OUTPUT_SINK_GET_CLASS (this);
GST_INFO_OBJECT (this, "starting");
/* FIXME: until here the same */
#if 0
this->main_context = g_main_context_new ();
CLIENTS_LOCK (this);
for (clients = this->clients; clients; clients = clients->next) {
GstOutputClient *client;
client = clients->data;
if (client->source)
continue;
client->source =
g_output_create_source (client->output,
G_IO_IN | G_IO_OUT | G_IO_PRI | G_IO_ERR | G_IO_HUP, this->cancellable);
g_source_set_callback (client->source,
(GSourceFunc) gst_multi_output_sink_output_condition,
gst_object_ref (this), (GDestroyNotify) gst_object_unref);
g_source_attach (client->source, this->main_context);
}
CLIENTS_UNLOCK (this);
/* FIXME: this bit shared */
#endif
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_new ("multioutputsink",
(GThreadFunc) gst_multi_output_sink_thread, this);
GST_OBJECT_FLAG_SET (this, GST_MULTI_OUTPUT_SINK_OPEN);
return TRUE;
}
static gboolean
multioutputsink_hash_remove (gpointer key, gpointer value, gpointer data)
{
return TRUE;
}
static gboolean
gst_multi_output_sink_stop (GstBaseSink * bsink)
{
GstMultiOutputSinkClass *fclass;
GstMultiOutputSink *this;
GstBuffer *buf;
gint i;
this = GST_MULTI_OUTPUT_SINK (bsink);
fclass = GST_MULTI_OUTPUT_SINK_GET_CLASS (this);
if (!GST_OBJECT_FLAG_IS_SET (bsink, GST_MULTI_OUTPUT_SINK_OPEN))
return TRUE;
this->running = FALSE;
if (parent_class->wakeup)
parent_class->wakeup (this);
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_output_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);
#ifdef 0
if (this->main_context) {
g_main_context_unref (this->main_context);
this->main_context = NULL;
}
#endif
g_hash_table_foreach_remove (this->output_hash, multioutputsink_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_OUTPUT_SINK_OPEN);
return TRUE;
}
static GstStateChangeReturn
gst_multi_output_sink_change_state (GstElement * element,
GstStateChange transition)
{
GstMultiOutputSink *sink;
GstStateChangeReturn ret;
sink = GST_MULTI_OUTPUT_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 (!parent_class->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_output_sink_stop (GST_BASE_SINK (sink));
break;
default:
break;
}
return ret;
/* ERRORS */
start_failed:
{
/* error message was posted */
return GST_STATE_CHANGE_FAILURE;
}
}
#if 0
static gboolean
gst_multi_output_sink_unlock (GstBaseSink * bsink)
{
GstMultiOutputSink *sink;
sink = GST_MULTI_OUTPUT_SINK (bsink);
GST_DEBUG_OBJECT (sink, "set to flushing");
g_cancellable_cancel (sink->cancellable);
if (sink->main_context)
g_main_context_wakeup (sink->main_context);
return TRUE;
}
/* will be called only between calls to start() and stop() */
static gboolean
gst_multi_output_sink_unlock_stop (GstBaseSink * bsink)
{
GstMultiOutputSink *sink;
sink = GST_MULTI_OUTPUT_SINK (bsink);
GST_DEBUG_OBJECT (sink, "unset flushing");
g_object_unref (sink->cancellable);
sink->cancellable = g_cancellable_new ();
return TRUE;
}
#endif
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