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gstreamer/gst/multifdsink/gstmultifdsink.h

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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>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#ifndef __GST_MULTI_FD_SINK_H__
#define __GST_MULTI_FD_SINK_H__
#include <gst/gst.h>
#include <gst/base/gstbasesink.h>
G_BEGIN_DECLS
#define GST_TYPE_MULTI_FD_SINK \
(gst_multi_fd_sink_get_type())
#define GST_MULTI_FD_SINK(obj) \
(G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_MULTI_FD_SINK,GstMultiFdSink))
#define GST_MULTI_FD_SINK_CLASS(klass) \
(G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_MULTI_FD_SINK,GstMultiFdSinkClass))
#define GST_IS_MULTI_FD_SINK(obj) \
(G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_MULTI_FD_SINK))
#define GST_IS_MULTI_FD_SINK_CLASS(klass) \
(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_MULTI_FD_SINK))
#define GST_MULTI_FD_SINK_GET_CLASS(klass) \
(G_TYPE_INSTANCE_GET_CLASS ((klass), GST_TYPE_MULTI_FD_SINK, GstMultiFdSinkClass))
typedef struct _GstMultiFdSink GstMultiFdSink;
typedef struct _GstMultiFdSinkClass GstMultiFdSinkClass;
typedef enum {
GST_MULTI_FD_SINK_OPEN = (GST_ELEMENT_FLAG_LAST << 0),
GST_MULTI_FD_SINK_FLAG_LAST = (GST_ELEMENT_FLAG_LAST << 2)
} GstMultiFdSinkFlags;
/**
* 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;
/**
* GstTCPUnitType:
* @GST_TCP_UNIT_TYPE_UNDEFINED: undefined
* @GST_TCP_UNIT_TYPE_BUFFERS : buffers
* @GST_TCP_UNIT_TYPE_TIME : timeunits (in nanoseconds)
* @GST_TCP_UNIT_TYPE_BYTES : bytes
*
* The units used to specify limits.
*/
typedef enum
{
GST_TCP_UNIT_TYPE_UNDEFINED,
GST_TCP_UNIT_TYPE_BUFFERS,
GST_TCP_UNIT_TYPE_TIME,
GST_TCP_UNIT_TYPE_BYTES
} GstTCPUnitType;
/**
* 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
* multifdsink 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;
/* structure for a client
*/
typedef struct {
GstPollFD fd;
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;
gboolean is_socket;
GSList *sending; /* the buffers we need to send */
gint bufoffset; /* offset in the first buffer */
gboolean discont;
gboolean caps_sent;
gboolean new_connection;
gboolean currently_removing;
/* method to sync client when connecting */
GstSyncMethod sync_method;
GstTCPUnitType burst_min_unit;
guint64 burst_min_value;
GstTCPUnitType burst_max_unit;
guint64 burst_max_value;
GstCaps *caps; /* caps of last queued buffer */
/* stats */
guint64 bytes_sent;
guint64 connect_time;
guint64 disconnect_time;
guint64 last_activity_time;
guint64 dropped_buffers;
guint64 avg_queue_size;
guint64 first_buffer_ts;
guint64 last_buffer_ts;
} GstTCPClient;
#define CLIENTS_LOCK_INIT(fdsink) (g_static_rec_mutex_init(&fdsink->clientslock))
#define CLIENTS_LOCK_FREE(fdsink) (g_static_rec_mutex_free(&fdsink->clientslock))
#define CLIENTS_LOCK(fdsink) (g_static_rec_mutex_lock(&fdsink->clientslock))
#define CLIENTS_UNLOCK(fdsink) (g_static_rec_mutex_unlock(&fdsink->clientslock))
/**
* GstMultiFdSink:
*
* The multifdsink object structure.
*/
struct _GstMultiFdSink {
GstBaseSink element;
/*< private >*/
guint64 bytes_to_serve; /* how much bytes we must serve */
guint64 bytes_served; /* how much bytes have we served */
GStaticRecMutex clientslock; /* lock to protect the clients list */
GList *clients; /* list of clients we are serving */
GHashTable *fd_hash; /* index on fd to client */
guint clients_cookie; /* Cookie to detect changes to the clients list */
gint mode;
GstPoll *fdset;
GSList *streamheader; /* GSList of GstBuffers to use as streamheader */
gboolean previous_buffer_in_caps;
guint mtu;
gint qos_dscp;
gboolean handle_read;
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 */
GstTCPUnitType unit_type;/* the type 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 */
GstTCPUnitType def_burst_unit;
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 */
guint8 header_flags;
};
struct _GstMultiFdSinkClass {
GstBaseSinkClass parent_class;
/* element methods */
void (*add) (GstMultiFdSink *sink, int fd);
void (*add_full) (GstMultiFdSink *sink, int fd, GstSyncMethod sync,
GstTCPUnitType format, guint64 value,
GstTCPUnitType max_unit, guint64 max_value);
void (*remove) (GstMultiFdSink *sink, int fd);
void (*remove_flush) (GstMultiFdSink *sink, int fd);
void (*clear) (GstMultiFdSink *sink);
GValueArray* (*get_stats) (GstMultiFdSink *sink, int fd);
/* vtable */
gboolean (*init) (GstMultiFdSink *sink);
gboolean (*wait) (GstMultiFdSink *sink, GstPoll *set);
gboolean (*close) (GstMultiFdSink *sink);
void (*removed) (GstMultiFdSink *sink, int fd);
/* signals */
void (*client_added) (GstElement *element, gint fd);
void (*client_removed) (GstElement *element, gint fd, GstClientStatus status);
void (*client_fd_removed) (GstElement *element, gint fd);
};
GType gst_multi_fd_sink_get_type (void);
void gst_multi_fd_sink_add (GstMultiFdSink *sink, int fd);
void gst_multi_fd_sink_add_full (GstMultiFdSink *sink, int fd, GstSyncMethod sync,
GstTCPUnitType min_unit, guint64 min_value,
GstTCPUnitType max_unit, guint64 max_value);
void gst_multi_fd_sink_remove (GstMultiFdSink *sink, int fd);
void gst_multi_fd_sink_remove_flush (GstMultiFdSink *sink, int fd);
void gst_multi_fd_sink_clear (GstMultiFdSink *sink);
GValueArray* gst_multi_fd_sink_get_stats (GstMultiFdSink *sink, int fd);
G_END_DECLS
#endif /* __GST_MULTI_FD_SINK_H__ */
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