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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., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#ifndef __GST_FORMAT_H__
#define __GST_FORMAT_H__
#include <glib.h>
#include <gst/gstiterator.h>
G_BEGIN_DECLS
/**
* GstFormat:
* @GST_FORMAT_UNDEFINED: undefined format
* @GST_FORMAT_DEFAULT: the default format of the pad/element. This can be
* samples for raw audio, frames/fields for raw video (some, but not all,
* elements support this; use @GST_FORMAT_TIME if you don't have a good
* reason to query for samples/frames)
* @GST_FORMAT_BYTES: bytes
* @GST_FORMAT_TIME: time in nanoseconds
* @GST_FORMAT_BUFFERS: buffers (few, if any, elements implement this as of
* May 2009)
* @GST_FORMAT_PERCENT: percentage of stream (few, if any, elements implement
* this as of May 2009)
*
* Standard predefined formats
*/
/* NOTE: don't forget to update the table in gstformat.c when changing
* this enum */
typedef enum {
GST_FORMAT_UNDEFINED = 0, /* must be first in list */
GST_FORMAT_DEFAULT = 1,
GST_FORMAT_BYTES = 2,
GST_FORMAT_TIME = 3,
GST_FORMAT_BUFFERS = 4,
GST_FORMAT_PERCENT = 5
} GstFormat;
/* a percentage is always relative to 1000000 */
/**
* GST_FORMAT_PERCENT_MAX:
*
* The PERCENT format is between 0 and this value
*/
#define GST_FORMAT_PERCENT_MAX G_GINT64_CONSTANT (1000000)
/**
* GST_FORMAT_PERCENT_SCALE:
*
* The value used to scale down the reported PERCENT format value to
* its real value.
*/
#define GST_FORMAT_PERCENT_SCALE G_GINT64_CONSTANT (10000)
typedef struct _GstFormatDefinition GstFormatDefinition;
/**
* GstFormatDefinition:
* @value: The unique id of this format
* @nick: A short nick of the format
* @description: A longer description of the format
* @quark: A quark for the nick
*
* A format definition
*/
struct _GstFormatDefinition
{
GstFormat value;
const gchar *nick;
const gchar *description;
GQuark quark;
};
GST_API
const gchar* gst_format_get_name (GstFormat format);
GST_API
GQuark gst_format_to_quark (GstFormat format);
/* register a new format */
GST_API
GstFormat gst_format_register (const gchar *nick,
const gchar *description);
GST_API
GstFormat gst_format_get_by_nick (const gchar *nick);
/* check if a format is in an array of formats */
GST_API
gboolean gst_formats_contains (const GstFormat *formats, GstFormat format);
/* query for format details */
GST_API
const GstFormatDefinition*
gst_format_get_details (GstFormat format);
GST_API
GstIterator* gst_format_iterate_definitions (void);
G_END_DECLS
#endif /* __GST_FORMAT_H__ */
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