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gstreamer/gst/tcp/gstmultihandlesink.h
Sebastian Dröge 5a65f5f3b7 multihandlesink: Use the monotonic clock for detecting timeouts and connection durations 
Otherwise real-time clock changes can wrongly trigger timeouts, or not
cause timeouts to happen in time.

Unfortunately real-time clock times still have to be kept track inside
the elements for the statistics. Switching those over to the monotonic
clock would cause behaviour changes from the application point of view.

The statistics are extended with fields with monotonic times though.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gst-plugins-base/-/merge_requests/1137>
2021-05-05 16:12:38 +00:00

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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) <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.
*/
#ifndef __GST_MULTI_HANDLE_SINK_H__
#define __GST_MULTI_HANDLE_SINK_H__
#include <gst/gst.h>
#include <gst/base/gstbasesink.h>
#include <gio/gio.h>
G_BEGIN_DECLS
#define GST_TYPE_MULTI_HANDLE_SINK \
(gst_multi_handle_sink_get_type())
#define GST_MULTI_HANDLE_SINK(obj) \
(G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_MULTI_HANDLE_SINK,GstMultiHandleSink))
#define GST_MULTI_HANDLE_SINK_CAST(obj) ((GstMultiHandleSink *)(obj))
#define GST_MULTI_HANDLE_SINK_CLASS(klass) \
(G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_MULTI_HANDLE_SINK,GstMultiHandleSinkClass))
#define GST_IS_MULTI_HANDLE_SINK(obj) \
(G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_MULTI_HANDLE_SINK))
#define GST_IS_MULTI_HANDLE_SINK_CLASS(klass) \
(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_MULTI_HANDLE_SINK))
#define GST_MULTI_HANDLE_SINK_GET_CLASS(klass) \
(G_TYPE_INSTANCE_GET_CLASS ((klass), GST_TYPE_MULTI_HANDLE_SINK, GstMultiHandleSinkClass))
typedef struct _GstMultiHandleSink GstMultiHandleSink;
typedef struct _GstMultiHandleSinkClass GstMultiHandleSinkClass;
typedef enum {
GST_MULTI_HANDLE_SINK_OPEN = (GST_ELEMENT_FLAG_LAST << 0),
GST_MULTI_HANDLE_SINK_FLAG_LAST = (GST_ELEMENT_FLAG_LAST << 2)
} GstMultiHandleSinkFlags;
/**
* GstRecoverPolicy:
* @GST_RECOVER_POLICY_NONE : no recovering is done
* @GST_RECOVER_POLICY_RESYNC_LATEST : client is moved to last buffer
* @GST_RECOVER_POLICY_RESYNC_SOFT_LIMIT: client is moved to the soft limit
* @GST_RECOVER_POLICY_RESYNC_KEYFRAME : client is moved to latest keyframe
*
* Possible values for the recovery procedure to use when a client consumes
* data too slow and has a backlag of more that soft-limit buffers.
*/
typedef enum
{
GST_RECOVER_POLICY_NONE,
GST_RECOVER_POLICY_RESYNC_LATEST,
GST_RECOVER_POLICY_RESYNC_SOFT_LIMIT,
GST_RECOVER_POLICY_RESYNC_KEYFRAME
} GstRecoverPolicy;
/**
* GstSyncMethod:
* @GST_SYNC_METHOD_LATEST : client receives most recent buffer
* @GST_SYNC_METHOD_NEXT_KEYFRAME : client receives next keyframe
* @GST_SYNC_METHOD_LATEST_KEYFRAME : client receives latest keyframe (burst)
* @GST_SYNC_METHOD_BURST : client receives specific amount of data
* @GST_SYNC_METHOD_BURST_KEYFRAME : client receives specific amount of data
* starting from latest keyframe
* @GST_SYNC_METHOD_BURST_WITH_KEYFRAME : client receives specific amount of data from
* a keyframe, or if there is not enough data after
* the keyframe, starting before the keyframe
*
* This enum defines the selection of the first buffer that is sent
* to a new client.
*/
typedef enum
{
GST_SYNC_METHOD_LATEST,
GST_SYNC_METHOD_NEXT_KEYFRAME,
GST_SYNC_METHOD_LATEST_KEYFRAME,
GST_SYNC_METHOD_BURST,
GST_SYNC_METHOD_BURST_KEYFRAME,
GST_SYNC_METHOD_BURST_WITH_KEYFRAME
} GstSyncMethod;
/**
* GstClientStatus:
* @GST_CLIENT_STATUS_OK : client is ok
* @GST_CLIENT_STATUS_CLOSED : client closed the socket
* @GST_CLIENT_STATUS_REMOVED : client is removed
* @GST_CLIENT_STATUS_SLOW : client is too slow
* @GST_CLIENT_STATUS_ERROR : client is in error
* @GST_CLIENT_STATUS_DUPLICATE: same client added twice
* @GST_CLIENT_STATUS_FLUSHING : client is flushing out the remaining buffers.
*
* This specifies the reason why a client was removed from
* multisocketsink and is received in the "client-removed" signal.
*/
typedef enum
{
GST_CLIENT_STATUS_OK = 0,
GST_CLIENT_STATUS_CLOSED = 1,
GST_CLIENT_STATUS_REMOVED = 2,
GST_CLIENT_STATUS_SLOW = 3,
GST_CLIENT_STATUS_ERROR = 4,
GST_CLIENT_STATUS_DUPLICATE = 5,
GST_CLIENT_STATUS_FLUSHING = 6
} GstClientStatus;
// FIXME: is it better to use GSocket * or a gpointer here ?
typedef union
{
gpointer pointer;
int fd;
GSocket *socket;
} GstMultiSinkHandle;
/* structure for a client
*/
typedef struct {
GstMultiSinkHandle handle;
gchar debug[30]; /* a debug string used in debug calls to
identify the client */
gint bufpos; /* position of this client in the global queue */
gint flushcount; /* the remaining number of buffers to flush out or -1 if the
client is not flushing. */
GstClientStatus status;
GSList *sending; /* the buffers we need to send */
gint bufoffset; /* offset in the first buffer */
gboolean discont;
gboolean new_connection;
gboolean currently_removing;
/* method to sync client when connecting */
GstSyncMethod sync_method;
GstFormat burst_min_format;
guint64 burst_min_value;
GstFormat burst_max_format;
guint64 burst_max_value;
GstCaps *caps; /* caps of last queued buffer */
/* stats */
guint64 bytes_sent;
guint64 connect_time;
guint64 connect_time_monotonic;
guint64 disconnect_time;
guint64 disconnect_time_monotonic;
guint64 last_activity_time;
guint64 last_activity_time_monotonic;
guint64 dropped_buffers;
guint64 avg_queue_size;
guint64 first_buffer_ts;
guint64 last_buffer_ts;
} GstMultiHandleClient;
#define CLIENTS_LOCK_INIT(mhsink) (g_rec_mutex_init(&(mhsink)->clientslock))
#define CLIENTS_LOCK_CLEAR(mhsink) (g_rec_mutex_clear(&(mhsink)->clientslock))
#define CLIENTS_LOCK(mhsink) (g_rec_mutex_lock(&(mhsink)->clientslock))
#define CLIENTS_UNLOCK(mhsink) (g_rec_mutex_unlock(&(mhsink)->clientslock))
gint gst_multi_handle_sink_setup_dscp_client (GstMultiHandleSink * sink, GstMultiHandleClient * client);
gint
gst_multi_handle_sink_new_client_position (GstMultiHandleSink * sink,
GstMultiHandleClient * client);
/**
* GstMultiHandleSink:
*
* The multisocketsink object structure.
*/
struct _GstMultiHandleSink {
GstBaseSink element;
/*< private >*/
guint64 bytes_to_serve; /* how much bytes we must serve */
guint64 bytes_served; /* how much bytes have we served */
GRecMutex clientslock; /* lock to protect the clients list */
GList *clients; /* list of clients we are serving */
guint clients_cookie; /* Cookie to detect changes to the clients list */
GHashTable *handle_hash; /* index of handle -> GstMultiHandleClient */
GMainContext *main_context;
GCancellable *cancellable;
gint qos_dscp;
GArray *bufqueue; /* global queue of buffers */
gboolean running; /* the thread state */
GThread *thread; /* the sender thread */
/* these values are used to check if a client is reading fast
* enough and to control receovery */
GstFormat unit_format;/* the format of the units */
gint64 units_max; /* max units to queue for a client */
gint64 units_soft_max; /* max units a client can lag before recovery starts */
GstRecoverPolicy recover_policy;
GstClockTime timeout; /* max amount of nanoseconds to remain idle */
GstSyncMethod def_sync_method; /* what method to use for connecting clients */
GstFormat def_burst_format;
guint64 def_burst_value;
/* these values are used to control the amount of data
* kept in the queues. It allows clients to perform a burst
* on connect. */
gint bytes_min; /* min number of bytes to queue */
gint64 time_min; /* min time to queue */
gint buffers_min; /* min number of buffers to queue */
gboolean resend_streamheader; /* resend streamheader if it changes */
/* stats */
gint buffers_queued; /* number of queued buffers */
gint bytes_queued; /* number of queued bytes */
gint time_queued; /* number of queued time */
};
struct _GstMultiHandleSinkClass {
GstBaseSinkClass parent_class;
/* methods */
void (*clear) (GstMultiHandleSink *sink);
void (*stop_pre) (GstMultiHandleSink *sink);
void (*stop_post) (GstMultiHandleSink *sink);
gboolean (*start_pre) (GstMultiHandleSink *sink);
gpointer (*thread) (GstMultiHandleSink *sink);
/* called by subclass when it has a new buffer to queue for a client */
gboolean (*client_queue_buffer)
(GstMultiHandleSink *sink,
GstMultiHandleClient *client,
GstBuffer *buffer);
int (*client_get_fd)
(GstMultiHandleClient *client);
void (*client_free) (GstMultiHandleSink *mhsink,
GstMultiHandleClient *client);
void (*handle_debug) (GstMultiSinkHandle handle, gchar debug[30]);
gpointer (*handle_hash_key) (GstMultiSinkHandle handle);
/* called when the client hash/list has been changed */
void (*hash_changed) (GstMultiHandleSink *mhsink);
void (*hash_adding) (GstMultiHandleSink *mhsink, GstMultiHandleClient *client);
void (*hash_removing) (GstMultiHandleSink *mhsink, GstMultiHandleClient *client);
GstMultiHandleClient* (*new_client) (GstMultiHandleSink *mhsink, GstMultiSinkHandle handle, GstSyncMethod sync_method);
/* vtable */
gboolean (*init) (GstMultiHandleSink *sink);
gboolean (*close) (GstMultiHandleSink *sink);
void (*removed) (GstMultiHandleSink *sink, GstMultiSinkHandle handle);
/* subclass needs to emit these because actual argument size (int/pointer) differs */
void (*emit_client_added) (GstMultiHandleSink *mhsink, GstMultiSinkHandle handle);
void (*emit_client_removed) (GstMultiHandleSink *mhsink, GstMultiSinkHandle handle, GstClientStatus status);
};
GType gst_multi_handle_sink_get_type (void);
void gst_multi_handle_sink_add (GstMultiHandleSink *sink, GstMultiSinkHandle handle);
void gst_multi_handle_sink_add_full (GstMultiHandleSink *sink, GstMultiSinkHandle handle, GstSyncMethod sync,
GstFormat min_format, guint64 min_value,
GstFormat max_format, guint64 max_value);
void gst_multi_handle_sink_remove (GstMultiHandleSink *sink, GstMultiSinkHandle handle);
void gst_multi_handle_sink_remove_flush (GstMultiHandleSink *sink, GstMultiSinkHandle handle);
GstStructure* gst_multi_handle_sink_get_stats (GstMultiHandleSink *sink, GstMultiSinkHandle handle);
void gst_multi_handle_sink_remove_client_link (GstMultiHandleSink * sink,
GList * link);
void gst_multi_handle_sink_client_init (GstMultiHandleClient * client, GstSyncMethod sync_method);
#define GST_TYPE_RECOVER_POLICY (gst_multi_handle_sink_recover_policy_get_type())
GType gst_multi_handle_sink_recover_policy_get_type (void);
#define GST_TYPE_SYNC_METHOD (gst_multi_handle_sink_sync_method_get_type())
GType gst_multi_handle_sink_sync_method_get_type (void);
#define GST_TYPE_CLIENT_STATUS (gst_multi_handle_sink_client_status_get_type())
GType gst_multi_handle_sink_client_status_get_type (void);
G_END_DECLS
#endif /* __GST_MULTI_HANDLE_SINK_H__ */
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