gstreamer/sys/oss/gstosselement.h

/* GStreamer
 * Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
 *                    2000 Wim Taymans <wim.taymans@chello.be>
 *
 * gstosselement.h: 
 *
 * 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_OSS_ELEMENT_H__
#define __GST_OSS_ELEMENT_H__

#include <gst/gst.h>

/* debugging category */
GST_DEBUG_CATEGORY_EXTERN (oss_debug);
#define GST_CAT_DEFAULT oss_debug

G_BEGIN_DECLS
#define GST_TYPE_OSSELEMENT \
  (gst_osselement_get_type())
#define GST_OSSELEMENT(obj) \
  (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_OSSELEMENT,GstOssElement))
#define GST_OSSELEMENT_CLASS(klass) \
  (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_OSSELEMENT,GstOssElementClass))
#define GST_IS_OSSELEMENT(obj) \
  (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_OSSELEMENT))
#define GST_IS_OSSELEMENT_CLASS(obj) \
  (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_OSSELEMENT))
#define GST_OSSELEMENT_GET_CLASS(obj) \
  (G_TYPE_INSTANCE_GET_CLASS ((obj), GST_TYPE_OSSELEMENT, GstOssElementClass))
typedef struct _GstOssElement GstOssElement;
typedef struct _GstOssElementClass GstOssElementClass;

typedef enum
{
  GST_OSSELEMENT_READ,
  GST_OSSELEMENT_WRITE,
} GstOssOpenMode;

typedef struct _GstOssDeviceCombination
{
  gchar *dsp, *mixer;
  dev_t dev;
} GstOssDeviceCombination;

struct _GstOssElement
{
  /* yes, we're a gstelement too */
  GstElement parent;

  gchar *device, *mixer_dev;

  /* device state */
  int fd;
  int caps;			/* the capabilities */
  gint format;
  gint fragment;
  guint64 fragment_time;
  gint fragment_size;
  GstOssOpenMode mode;

  /* stats bytes per *second* */
  guint bps;

  /* parameters */
  gint law;
  gint endianness;
  gboolean sign;
  gint width;
  gint depth;
  gint channels;
  gint rate;

  /* mixer stuff */
  GList *tracklist;
  guint32 stereomask, recdevs, recmask, mixcaps;
  gint mixer_fd;
  gchar *device_name;
};

struct _GstOssElementClass
{
  GstElementClass klass;

  GList *device_combinations;
};

GType gst_osselement_get_type (void);

/* some useful functions */
gboolean gst_osselement_parse_caps (GstOssElement * oss, const GstCaps * caps);
gboolean gst_osselement_merge_fixed_caps (GstOssElement * oss, GstCaps * caps);

gboolean gst_osselement_sync_parms (GstOssElement * oss);
void gst_osselement_reset (GstOssElement * oss);

gboolean gst_osselement_convert (GstOssElement * oss,
    GstFormat src_format,
    gint64 src_value, GstFormat * dest_format, gint64 * dest_value);

G_END_DECLS
#endif /* __GST_OSS_ELEMENT_H__ */