gstreamer/gst/volume/gstvolume.h

/* -*- c-basic-offset: 2 -*-
 * GStreamer
 * Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
 *
 * 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_VOLUME_H__
#define __GST_VOLUME_H__


#include <config.h>
#include <gst/gst.h>
/* #include <gst/meta/audioraw.h> */


#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */


#define GST_TYPE_VOLUME \
  (gst_volume_get_type())
#define GST_VOLUME(obj) \
  (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_VOLUME,GstVolume))
#define GST_VOLUME_CLASS(klass) \
  (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_ULAW,GstVolume))
#define GST_IS_VOLUME(obj) \
  (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_VOLUME))
#define GST_IS_VOLUME_CLASS(obj) \
  (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_VOLUME))

typedef struct _GstVolume GstVolume;
typedef struct _GstVolumeClass GstVolumeClass;
typedef enum _GstVolumeFormat GstVolumeFormat;

enum _GstVolumeFormat {
  GST_VOLUME_FORMAT_INT=1,
  GST_VOLUME_FORMAT_FLOAT
};

struct _GstVolume {
  GstElement element;

  GstPad *sinkpad, *srcpad;

  gboolean silent;
  gboolean muted;
  gint16 volume_i;
  gfloat volume_f;
  
  /* the next three are valid for both int and float */
  
  GstVolumeFormat format;
  guint rate;
  guint channels;
  
  /* the next five are valid only for format==GST_VOLUME_FORMAT_INT */
  
  guint width;
  guint depth;
  guint endianness;
  guint law;
  gboolean is_signed;
  
  /* the next three are valid only for format==GST_VOLUME_FORMAT_FLOAT */
  
  const gchar *layout;
  gfloat slope;
  gfloat intercept;
};

struct _GstVolumeClass {
  GstElementClass parent_class;
};

GType gst_volume_get_type(void);

#ifdef __cplusplus
}
#endif /* __cplusplus */


#endif /* __GST_VOLUME_H__ */