gstreamer/gst/switch/gstswitch.h

/* GStreamer
 * Copyright (C) 2003 Julien Moutte <julien@moutte.net>
 *
 * 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_SWITCH_H__
#define __GST_SWITCH_H__

#include <gst/gst.h>

G_BEGIN_DECLS

#define GST_TYPE_SWITCH \
  (gst_switch_get_type())
#define GST_SWITCH(obj) \
  (G_TYPE_CHECK_INSTANCE_CAST((obj), GST_TYPE_SWITCH, GstSwitch))
#define GST_SWITCH_CLASS(klass) \
  (G_TYPE_CHECK_CLASS_CAST((klass), GST_TYPE_SWITCH, GstSwitchClass))
#define GST_IS_SWITCH(obj) \
  (G_TYPE_CHECK_INSTANCE_TYPE((obj), GST_TYPE_SWITCH))
#define GST_IS_SWITCH_CLASS(klass) \
  (G_TYPE_CHECK_CLASS_TYPE((klass), GST_TYPE_SWITCH))

typedef struct _GstSwitch GstSwitch;
typedef struct _GstSwitchClass GstSwitchClass;

struct _GstSwitch {
  GstElement element;
  
  GstPad *active_sinkpad;
  GstPad *srcpad;
  GstPad *previous_sinkpad;

  guint nb_sinkpads;
  /* this hash table stores for key of the pad pointer
   * the last new segment event received for this pad
   * so when switching we can send new segment events
   */
  GHashTable *newsegment_events;
  /* flag to decide whether we need to send a new segment event
   * before we receive the next buffer */
  gboolean need_to_send_newsegment;
  /* flag to decide whether to queue buffers received from current
   * pads */
  gboolean queue_buffers;
  GstClockTime stop_value;
  GstClockTime start_value;
  GstClockTime current_start;
  GstClockTime last_ts;
  /* this hash tables stores for key of the pad pointer
   * a GList of stored buffers that need to be sent once the
   * new segment has been sent
   */
  GHashTable *stored_buffers;
  GMutex *switch_mutex;
};

#define GST_SWITCH_LOCK(obj) g_mutex_lock(obj->switch_mutex)
#define GST_SWITCH_UNLOCK(obj) g_mutex_unlock(obj->switch_mutex)

struct _GstSwitchClass {
  GstElementClass parent_class;
};

GType gst_switch_get_type (void);

G_END_DECLS

#endif /* __GST_SWITCH_H__ */