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gstreamer/gst/tcp/gstmultioutputsink.c
Tim-Philipp Müller bcb8068e27 docs: remove outdated and pointless 'Last reviewed' lines from docs 
They are very confusing for people, and more often than not
also just not very accurate. Seeing 'last reviewed: 2005' in
your docs is not very confidence-inspiring. Let's just remove
those comments.
2014-04-26 23:28:57 +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,
PROP_LAST
};
#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 == 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 %"
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_cancellable_reset (sink->cancellable);
return TRUE;
}
#endif
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