gstreamer/gst/gstformat.h

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/* GStreamer
* Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
* 2000 Wim Taymans <wim.taymans@chello.be>
*
* gstformat.h: Header for GstFormat types used in queries and
* seeking.
*
* 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_FORMAT_H__
#define __GST_FORMAT_H__
#include <glib.h>
G_BEGIN_DECLS
typedef enum {
GST_FORMAT_UNDEFINED = 0, /* must be first in list */
GST_FORMAT_DEFAULT = 1, /* samples for audio, frames/fields for video */
GST_FORMAT_BYTES = 2,
GST_FORMAT_TIME = 3,
GST_FORMAT_BUFFERS = 4,
GST_FORMAT_PERCENT = 5
} GstFormat;
/* a percentage is always relative to 1000000 */
#define GST_FORMAT_PERCENT_MAX G_GINT64_CONSTANT (1000000)
#define GST_FORMAT_PERCENT_SCALE G_GINT64_CONSTANT (10000)
typedef struct _GstFormatDefinition GstFormatDefinition;
struct _GstFormatDefinition
{
GstFormat value;
gchar *nick;
gchar *description;
};
#ifdef G_HAVE_ISO_VARARGS
#define GST_FORMATS_FUNCTION(type, functionname, ...) \
static const GstFormat* \
functionname (type object) \
{ \
static const GstFormat formats[] = { \
__VA_ARGS__, \
0 \
}; \
return formats; \
}
#elif defined(G_HAVE_GNUC_VARARGS)
#define GST_FORMATS_FUNCTION(type, functionname, a...) \
static const GstFormat* \
functionname (type object) \
{ \
static const GstFormat formats[] = { \
a, \
0 \
}; \
return formats; \
}
#endif
void _gst_format_initialize (void);
/* register a new format */
GstFormat gst_format_register (const gchar *nick,
const gchar *description);
GstFormat gst_format_get_by_nick (const gchar *nick);
/* check if a format is in an array of formats */
gboolean gst_formats_contains (const GstFormat *formats, GstFormat format);
/* query for format details */
G_CONST_RETURN GstFormatDefinition*
gst_format_get_details (GstFormat format);
G_CONST_RETURN GList*
gst_format_get_definitions (void);
G_END_DECLS
#endif /* __GST_FORMAT_H__ */