/* GStreamer
 * Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
 *                    2000 Wim Taymans <wim.taymans@chello.be>
 *
 * gstprobe.h: Header for GstProbe object
 *
 * 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_PROBE_H__
#define __GST_PROBE_H__

#include <glib.h>
#include <gst/gstdata.h>

G_BEGIN_DECLS typedef struct _GstProbe GstProbe;

/* the callback should return FALSE if the data should be discarded */
typedef gboolean (*GstProbeCallback) (GstProbe * probe,
    GstData ** data, gpointer user_data);

struct _GstProbe
{
  gboolean single_shot;

  GstProbeCallback callback;
  gpointer user_data;
};


GstProbe *gst_probe_new (gboolean single_shot,
    GstProbeCallback callback, gpointer user_data);
void gst_probe_destroy (GstProbe * probe);

gboolean gst_probe_perform (GstProbe * probe, GstData ** data);

typedef struct _GstProbeDispatcher GstProbeDispatcher;

struct _GstProbeDispatcher
{
  gboolean active;

  GSList *probes;
};

GstProbeDispatcher *gst_probe_dispatcher_new (void);
void gst_probe_dispatcher_destroy (GstProbeDispatcher * disp);
void gst_probe_dispatcher_init (GstProbeDispatcher * disp);

void gst_probe_dispatcher_set_active (GstProbeDispatcher * disp,
    gboolean active);
void gst_probe_dispatcher_add_probe (GstProbeDispatcher * disp,
    GstProbe * probe);
void gst_probe_dispatcher_remove_probe (GstProbeDispatcher * disp,
    GstProbe * probe);

gboolean gst_probe_dispatcher_dispatch (GstProbeDispatcher * disp,
    GstData ** data);

G_END_DECLS
#endif /* __GST_PAD_H__ */