/* 

 * GStreamer

 * Copyright (C) 2009 Sebastian Dröge <sebastian.droege@collabora.co.uk>

 *

 * 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_ECHO_H__

#define __GST_AUDIO_ECHO_H__

#include <gst/gst.h>

#include <gst/gst_global.h>

#include <gst/base/gstbasetransform.h>

#include <gst/audio/audio.h>

#include <gst/audio/gstaudiofilter.h>

G_BEGIN_DECLS

#define GST_TYPE_AUDIO_ECHO            (gst_audio_echo_get_type())

#define GST_AUDIO_ECHO(obj)            (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_AUDIO_ECHO,GstAudioEcho))

#define GST_IS_AUDIO_ECHO(obj)         (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_AUDIO_ECHO))

#define GST_AUDIO_ECHO_CLASS(klass)    (G_TYPE_CHECK_CLASS_CAST((klass) ,GST_TYPE_AUDIO_ECHO,GstAudioEchoClass))

#define GST_IS_AUDIO_ECHO_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE((klass) ,GST_TYPE_AUDIO_ECHO))

#define GST_AUDIO_ECHO_GET_CLASS(obj)  (G_TYPE_INSTANCE_GET_CLASS((obj) ,GST_TYPE_AUDIO_ECHO,GstAudioEchoClass))

typedef struct _GstAudioEcho GstAudioEcho;

typedef struct _GstAudioEchoClass GstAudioEchoClass;

typedef void (*GstAudioEchoProcessFunc) (GstAudioEcho *, guint8 *, guint);

struct _GstAudioEcho

{

  GstAudioFilter audiofilter;

  guint64 delay;

  guint64 max_delay;

  gfloat intensity;

  gfloat feedback;

  /* < private > */

  GstAudioEchoProcessFunc process;

  guint delay_frames;

  guint8 *buffer;

  guint buffer_pos;

  guint buffer_size;

  guint buffer_size_frames;

};

struct _GstAudioEchoClass

{

  GstAudioFilterClass parent;

};

#ifdef __SYMBIAN32__

IMPORT_C

#endif

GType gst_audio_echo_get_type (void);

G_END_DECLS

#endif /* __GST_AUDIO_ECHO_H__ */