/* GStreamer

 * Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>

 *                    2005 Wim Taymans <wim@fluendo.com>

 *

 * gstaudioclock.h: Clock for use by audio plugins

 *

 * 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_AUDIO_CLOCK_H__

#define __GST_AUDIO_CLOCK_H__

#include <gst/gstsystemclock.h>

G_BEGIN_DECLS

#define GST_TYPE_AUDIO_CLOCK \

  (gst_audio_clock_get_type())

#define GST_AUDIO_CLOCK(obj) \

  (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_AUDIO_CLOCK,GstAudioClock))

#define GST_AUDIO_CLOCK_CLASS(klass) \

  (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_AUDIO_CLOCK,GstAudioClockClass))

#define GST_IS_AUDIO_CLOCK(obj) \

  (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_AUDIO_CLOCK))

#define GST_IS_AUDIO_CLOCK_CLASS(klass) \

  (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_AUDIO_CLOCK))

typedef struct _GstAudioClock GstAudioClock;

typedef struct _GstAudioClockClass GstAudioClockClass;

/**

 * GstAudioClockGetTimeFunc:

 * @clock: the #GstAudioClock

 * @user_data: user data

 *

 * This function will be called whenever the current clock time needs to be

 * calculated. If this function returns #GST_CLOCK_TIME_NONE, the last reported

 * time will be returned by the clock.

 *

 * Returns: the current time or #GST_CLOCK_TIME_NONE if the previous time should

 * be used.

 */

typedef GstClockTime (*GstAudioClockGetTimeFunc) (GstClock *clock, gpointer user_data);

/**

 * GstAudioClock:

 * @clock: parent #GstSystemClock

 *

 * Opaque #GstAudioClock.

 */

struct _GstAudioClock {

  GstSystemClock clock;

  /* --- protected --- */

  GstAudioClockGetTimeFunc func;

  gpointer user_data;

  GstClockTime last_time;

  /*< private >*/

};

struct _GstAudioClockClass {

  GstSystemClockClass parent_class;

  /*< private >*/

  gpointer _gst_reserved[GST_PADDING];

};

#ifdef __SYMBIAN32__

IMPORT_C

#endif

GType           gst_audio_clock_get_type        (void);

#ifdef __SYMBIAN32__

IMPORT_C

#endif

                                                 gpointer user_data);

G_END_DECLS

#endif /* __GST_AUDIO_CLOCK_H__ */