/* GStreamer

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

 *                    2000 Wim Taymans <wtay@chello.be>

 *

 * gstadder.h: Header for GstAdder element

 *

 * 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_ADDER_H__

#define __GST_ADDER_H__

#include <gst/gst.h>

#include <gst/base/gstcollectpads.h>

G_BEGIN_DECLS

#define GST_TYPE_ADDER            (gst_adder_get_type())

#define GST_ADDER(obj)            (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_ADDER,GstAdder))

#define GST_IS_ADDER(obj)         (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_ADDER))

#define GST_ADDER_CLASS(klass)    (G_TYPE_CHECK_CLASS_CAST((klass) ,GST_TYPE_ADDER,GstAdderClass))

#define GST_IS_ADDER_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE((klass) ,GST_TYPE_ADDER))

#define GST_ADDER_GET_CLASS(obj)  (G_TYPE_INSTANCE_GET_CLASS((obj) ,GST_TYPE_ADDER,GstAdderClass))

typedef struct _GstAdder             GstAdder;

typedef struct _GstAdderClass        GstAdderClass;

typedef struct _GstAdderInputChannel GstAdderInputChannel;

typedef enum {

  GST_ADDER_FORMAT_UNSET,

  GST_ADDER_FORMAT_INT,

  GST_ADDER_FORMAT_FLOAT

} GstAdderFormat;

typedef void (*GstAdderFunction) (gpointer out, gpointer in, guint size);

/**

 * GstAdder:

 *

 * The adder object structure.

 */

struct _GstAdder {

  GstElement      element;

  GstPad         *srcpad;

  GstCollectPads *collect;

  /* pad counter, used for creating unique request pads */

  gint            padcount;

  /* the next are valid for both int and float */

  GstAdderFormat  format;

  gint            rate;

  gint            channels;

  gint            width;

  gint            endianness;

  /* the next are valid only for format == GST_ADDER_FORMAT_INT */

  gint            depth;

  gboolean        is_signed;

  /* number of bytes per sample, actually width/8 * channels */

  gint            bps;

  /* function to add samples */

  GstAdderFunction func;

  /* counters to keep track of timestamps */

  gint64          timestamp;

  gint64          offset;

  /* sink event handling */

  GstPadEventFunction  collect_event;

  GstSegment      segment;

  gboolean        segment_pending;

  guint64         segment_position;

  gdouble         segment_rate;

};

struct _GstAdderClass {

  GstElementClass parent_class;

};

#ifdef __SYMBIAN32__

IMPORT_C

#endif

GType    gst_adder_get_type (void);

G_END_DECLS

#endif /* __GST_ADDER_H__ */