gstreamer/gst/tcp/gstmultifdsink.h

/* 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_MULTIFDSINK_H__
#define __GST_MULTIFDSINK_H__


#include <gst/gst.h>

#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <errno.h>
#include <string.h>
#include <sys/time.h>
#include <sys/types.h>
#include <netinet/in.h>
#include <netdb.h>
#include <sys/socket.h>
#include <sys/wait.h>
#include <fcntl.h>
#include <arpa/inet.h>
#include "gsttcp.h"

#define GST_TYPE_MULTIFDSINK \
  (gst_multifdsink_get_type())
#define GST_MULTIFDSINK(obj) \
  (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_MULTIFDSINK,GstMultiFdSink))
#define GST_MULTIFDSINK_CLASS(klass) \
  (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_MULTIFDSINK,GstMultiFdSink))
#define GST_IS_MULTIFDSINK(obj) \
  (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_MULTIFDSINK))
#define GST_IS_MULTIFDSINK_CLASS(obj) \
  (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_MULTIFDSINK))
#define GST_MULTIFDSINK_GET_CLASS(obj) \
  (G_TYPE_INSTANCE_GET_CLASS ((obj), GST_TYPE_MULTIFDSINK, GstMultiFdSinkClass))
	

typedef struct _GstMultiFdSink GstMultiFdSink;
typedef struct _GstMultiFdSinkClass GstMultiFdSinkClass;

typedef enum {
  GST_MULTIFDSINK_OPEN             = GST_ELEMENT_FLAG_LAST,

  GST_MULTIFDSINK_FLAG_LAST        = GST_ELEMENT_FLAG_LAST + 2,
} GstMultiFdSinkFlags;

typedef enum
{
  GST_RECOVER_POLICY_NONE,
  GST_RECOVER_POLICY_RESYNC_START,
  GST_RECOVER_POLICY_RESYNC_SOFT,
  GST_RECOVER_POLICY_RESYNC_KEYFRAME,
} GstRecoverPolicy;

/* structure for a client
 *  */
typedef struct {
  int fd;
  gint bufpos;                  /* position of this client in the global queue */

  GList *sending;               /* the buffers we need to send */
  gint bufoffset;               /* offset in the first buffer */

  gboolean discont;

  GstTCPProtocolType protocol;

  gboolean caps_sent;
  gboolean streamheader_sent;
} GstTCPClient;

struct _GstMultiFdSink {
  GstElement element;

  /* pad */
  GstPad *sinkpad;

  size_t data_written; /* how much bytes have we written ? */

  GMutex *clientslock;	/* lock to protect the clients list */
  GList *clients;	/* list of clients we are serving */
  
  fd_set readfds; /* all the client file descriptors that we can read from */
  fd_set writefds; /* all the client file descriptors that we can write to */

  int control_sock[2];	/* sockets for controlling the select call */

  GList *streamheader; /* GList of GstBuffers to use as streamheader */
  GstTCPProtocolType protocol;
  guint mtu;

  GArray *bufqueue;	/* global queue of buffers */

  gboolean running;	/* the thread state */
  GThread *thread;	/* the sender thread */

  gint buffers_max;	/* max buffers to queue */
  gint buffers_soft_max;	/* max buffers a client can lay before recoevery starts */
  GstRecoverPolicy recover_policy;
  /* stats */
  gint buffers_queued;	/* number of queued buffers */
};

struct _GstMultiFdSinkClass {
  GstElementClass parent_class;

  /* element methods */
  void (*add)    (GstMultiFdSink *sink, int fd);
  void (*remove) (GstMultiFdSink *sink, int fd);
  void (*clear)  (GstMultiFdSink *sink);

  /* vtable */
  gboolean (*init)   (GstMultiFdSink *sink);
  gboolean (*select) (GstMultiFdSink *sink, fd_set *readfds, fd_set *writefds);
  gboolean (*close)  (GstMultiFdSink *sink);

  /* signals */
  void (*client_added) (GstElement *element, gchar *host, gint fd);
  void (*client_removed) (GstElement *element, gchar *host, gint fd);
};

GType gst_multifdsink_get_type (void);

void gst_multifdsink_add (GstMultiFdSink *sink, int fd);
void gst_multifdsink_remove (GstMultiFdSink *sink, int fd);
void gst_multifdsink_clear (GstMultiFdSink *sink);


#ifdef __cplusplus
}
#endif /* __cplusplus */


#endif /* __GST_MULTIFDSINK_H__ */