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289 lines
10 KiB
C
289 lines
10 KiB
C
/* GStreamer
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* Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
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* Copyright (C) <2004> Thomas Vander Stichele <thomas at apestaart dot org>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#ifndef __GST_MULTI_FD_SINK_H__
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#define __GST_MULTI_FD_SINK_H__
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#include <gst/gst.h>
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#include <gst/base/gstbasesink.h>
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G_BEGIN_DECLS
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#include "gsttcp.h"
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#define GST_TYPE_MULTI_FD_SINK \
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(gst_multi_fd_sink_get_type())
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#define GST_MULTI_FD_SINK(obj) \
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(G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_MULTI_FD_SINK,GstMultiFdSink))
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#define GST_MULTI_FD_SINK_CLASS(klass) \
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(G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_MULTI_FD_SINK,GstMultiFdSinkClass))
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#define GST_IS_MULTI_FD_SINK(obj) \
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(G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_MULTI_FD_SINK))
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#define GST_IS_MULTI_FD_SINK_CLASS(klass) \
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(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_MULTI_FD_SINK))
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#define GST_MULTI_FD_SINK_GET_CLASS(klass) \
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(G_TYPE_INSTANCE_GET_CLASS ((klass), GST_TYPE_MULTI_FD_SINK, GstMultiFdSinkClass))
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typedef struct _GstMultiFdSink GstMultiFdSink;
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typedef struct _GstMultiFdSinkClass GstMultiFdSinkClass;
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typedef enum {
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GST_MULTI_FD_SINK_OPEN = (GST_ELEMENT_FLAG_LAST << 0),
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GST_MULTI_FD_SINK_FLAG_LAST = (GST_ELEMENT_FLAG_LAST << 2)
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} GstMultiFdSinkFlags;
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/**
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* GstRecoverPolicy:
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* @GST_RECOVER_POLICY_NONE : no recovering is done
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* @GST_RECOVER_POLICY_RESYNC_LATEST : client is moved to last buffer
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* @GST_RECOVER_POLICY_RESYNC_SOFT_LIMIT: client is moved to the soft limit
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* @GST_RECOVER_POLICY_RESYNC_KEYFRAME : client is moved to latest keyframe
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*
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* Possible values for the recovery procedure to use when a client consumes
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* data too slow and has a backlag of more that soft-limit buffers.
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*/
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typedef enum
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{
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GST_RECOVER_POLICY_NONE,
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GST_RECOVER_POLICY_RESYNC_LATEST,
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GST_RECOVER_POLICY_RESYNC_SOFT_LIMIT,
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GST_RECOVER_POLICY_RESYNC_KEYFRAME
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} GstRecoverPolicy;
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/**
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* GstSyncMethod:
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* @GST_SYNC_METHOD_LATEST : client receives most recent buffer
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* @GST_SYNC_METHOD_NEXT_KEYFRAME : client receives next keyframe
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* @GST_SYNC_METHOD_LATEST_KEYFRAME : client receives latest keyframe (burst)
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* @GST_SYNC_METHOD_BURST : client receives specific amount of data
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* @GST_SYNC_METHOD_BURST_KEYFRAME : client receives specific amount of data
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* starting from latest keyframe
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* @GST_SYNC_METHOD_BURST_WITH_KEYFRAME : client receives specific amount of data from
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* a keyframe, or if there is not enough data after
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* the keyframe, starting before the keyframe
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*
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* This enum defines the selection of the first buffer that is sent
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* to a new client.
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*/
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typedef enum
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{
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GST_SYNC_METHOD_LATEST,
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GST_SYNC_METHOD_NEXT_KEYFRAME,
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GST_SYNC_METHOD_LATEST_KEYFRAME,
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GST_SYNC_METHOD_BURST,
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GST_SYNC_METHOD_BURST_KEYFRAME,
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GST_SYNC_METHOD_BURST_WITH_KEYFRAME
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} GstSyncMethod;
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/**
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* GstTCPUnitType:
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* @GST_TCP_UNIT_TYPE_UNDEFINED: undefined
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* @GST_TCP_UNIT_TYPE_BUFFERS : buffers
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* @GST_TCP_UNIT_TYPE_TIME : timeunits (in nanoseconds)
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* @GST_TCP_UNIT_TYPE_BYTES : bytes
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*
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* The units used to specify limits.
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*/
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typedef enum
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{
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GST_TCP_UNIT_TYPE_UNDEFINED,
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GST_TCP_UNIT_TYPE_BUFFERS,
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GST_TCP_UNIT_TYPE_TIME,
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GST_TCP_UNIT_TYPE_BYTES
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} GstTCPUnitType;
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/**
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* GstClientStatus:
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* @GST_CLIENT_STATUS_OK : client is ok
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* @GST_CLIENT_STATUS_CLOSED : client closed the socket
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* @GST_CLIENT_STATUS_REMOVED : client is removed
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* @GST_CLIENT_STATUS_SLOW : client is too slow
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* @GST_CLIENT_STATUS_ERROR : client is in error
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* @GST_CLIENT_STATUS_DUPLICATE: same client added twice
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* @GST_CLIENT_STATUS_FLUSHING : client is flushing out the remaining buffers.
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*
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* This specifies the reason why a client was removed from
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* multifdsink and is received in the "client-removed" signal.
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*/
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typedef enum
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{
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GST_CLIENT_STATUS_OK = 0,
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GST_CLIENT_STATUS_CLOSED = 1,
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GST_CLIENT_STATUS_REMOVED = 2,
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GST_CLIENT_STATUS_SLOW = 3,
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GST_CLIENT_STATUS_ERROR = 4,
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GST_CLIENT_STATUS_DUPLICATE = 5,
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GST_CLIENT_STATUS_FLUSHING = 6
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} GstClientStatus;
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/* structure for a client
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*/
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typedef struct {
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GstPollFD fd;
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gint bufpos; /* position of this client in the global queue */
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gint flushcount; /* the remaining number of buffers to flush out or -1 if the
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client is not flushing. */
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GstClientStatus status;
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gboolean is_socket;
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GSList *sending; /* the buffers we need to send */
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gint bufoffset; /* offset in the first buffer */
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gboolean discont;
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GstTCPProtocol protocol;
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gboolean caps_sent;
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gboolean new_connection;
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gboolean currently_removing;
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/* method to sync client when connecting */
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GstSyncMethod sync_method;
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GstTCPUnitType burst_min_unit;
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guint64 burst_min_value;
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GstTCPUnitType burst_max_unit;
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guint64 burst_max_value;
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GstCaps *caps; /* caps of last queued buffer */
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/* stats */
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guint64 bytes_sent;
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guint64 connect_time;
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guint64 disconnect_time;
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guint64 last_activity_time;
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guint64 dropped_buffers;
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guint64 avg_queue_size;
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guint64 first_buffer_ts;
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guint64 last_buffer_ts;
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} GstTCPClient;
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#define CLIENTS_LOCK_INIT(fdsink) (g_static_rec_mutex_init(&fdsink->clientslock))
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#define CLIENTS_LOCK_FREE(fdsink) (g_static_rec_mutex_free(&fdsink->clientslock))
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#define CLIENTS_LOCK(fdsink) (g_static_rec_mutex_lock(&fdsink->clientslock))
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#define CLIENTS_UNLOCK(fdsink) (g_static_rec_mutex_unlock(&fdsink->clientslock))
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/**
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* GstMultiFdSink:
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*
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* The multifdsink object structure.
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*/
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struct _GstMultiFdSink {
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GstBaseSink element;
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/*< private >*/
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guint64 bytes_to_serve; /* how much bytes we must serve */
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guint64 bytes_served; /* how much bytes have we served */
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GStaticRecMutex clientslock; /* lock to protect the clients list */
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GList *clients; /* list of clients we are serving */
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GHashTable *fd_hash; /* index on fd to client */
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guint clients_cookie; /* Cookie to detect changes to the clients list */
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gint mode;
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GstPoll *fdset;
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GSList *streamheader; /* GSList of GstBuffers to use as streamheader */
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gboolean previous_buffer_in_caps;
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GstTCPProtocol protocol;
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guint mtu;
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gint qos_dscp;
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gboolean handle_read;
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GArray *bufqueue; /* global queue of buffers */
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gboolean running; /* the thread state */
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GThread *thread; /* the sender thread */
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/* these values are used to check if a client is reading fast
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* enough and to control receovery */
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GstTCPUnitType unit_type;/* the type of the units */
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gint64 units_max; /* max units to queue for a client */
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gint64 units_soft_max; /* max units a client can lag before recovery starts */
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GstRecoverPolicy recover_policy;
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GstClockTime timeout; /* max amount of nanoseconds to remain idle */
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GstSyncMethod def_sync_method; /* what method to use for connecting clients */
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GstTCPUnitType def_burst_unit;
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guint64 def_burst_value;
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/* these values are used to control the amount of data
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* kept in the queues. It allows clients to perform a burst
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* on connect. */
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gint bytes_min; /* min number of bytes to queue */
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gint64 time_min; /* min time to queue */
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gint buffers_min; /* min number of buffers to queue */
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gboolean resend_streamheader; /* resend streamheader if it changes */
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/* stats */
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gint buffers_queued; /* number of queued buffers */
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gint bytes_queued; /* number of queued bytes */
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gint time_queued; /* number of queued time */
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guint8 header_flags;
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};
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struct _GstMultiFdSinkClass {
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GstBaseSinkClass parent_class;
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/* element methods */
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void (*add) (GstMultiFdSink *sink, int fd);
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void (*add_full) (GstMultiFdSink *sink, int fd, GstSyncMethod sync,
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GstTCPUnitType format, guint64 value,
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GstTCPUnitType max_unit, guint64 max_value);
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void (*remove) (GstMultiFdSink *sink, int fd);
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void (*remove_flush) (GstMultiFdSink *sink, int fd);
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void (*clear) (GstMultiFdSink *sink);
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GValueArray* (*get_stats) (GstMultiFdSink *sink, int fd);
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/* vtable */
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gboolean (*init) (GstMultiFdSink *sink);
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gboolean (*wait) (GstMultiFdSink *sink, GstPoll *set);
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gboolean (*close) (GstMultiFdSink *sink);
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void (*removed) (GstMultiFdSink *sink, int fd);
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/* signals */
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void (*client_added) (GstElement *element, gint fd);
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void (*client_removed) (GstElement *element, gint fd, GstClientStatus status);
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void (*client_fd_removed) (GstElement *element, gint fd);
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};
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GType gst_multi_fd_sink_get_type (void);
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void gst_multi_fd_sink_add (GstMultiFdSink *sink, int fd);
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void gst_multi_fd_sink_add_full (GstMultiFdSink *sink, int fd, GstSyncMethod sync,
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GstTCPUnitType min_unit, guint64 min_value,
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GstTCPUnitType max_unit, guint64 max_value);
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void gst_multi_fd_sink_remove (GstMultiFdSink *sink, int fd);
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void gst_multi_fd_sink_remove_flush (GstMultiFdSink *sink, int fd);
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void gst_multi_fd_sink_clear (GstMultiFdSink *sink);
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GValueArray* gst_multi_fd_sink_get_stats (GstMultiFdSink *sink, int fd);
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G_END_DECLS
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#endif /* __GST_MULTI_FD_SINK_H__ */
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