X-Git-Url: http://review.tizen.org/git/?a=blobdiff_plain;f=gst%2Fgstformat.h;h=111ca9b82751642aeb0aed0d7fe9add0ac32f0c0;hb=5470f6df00595f4ab44871e0e633bf15006abc5c;hp=14ac687fa9702d91eb625ebf18b12e08061a7676;hpb=ee7c28d455676eedea903d2abff7953275d83e2c;p=platform%2Fupstream%2Fgstreamer.git

diff --git a/gst/gstformat.h b/gst/gstformat.h
index 14ac687..111ca9b 100644
--- a/gst/gstformat.h
+++ b/gst/gstformat.h
@@ -2,7 +2,8 @@
  * Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
  *                    2000 Wim Taymans <wim.taymans@chello.be>
  *
- * gstformat.h: Header for GstFormat types of offset
+ * 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
@@ -16,8 +17,8 @@
  *
  * 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.
+ * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
+ * Boston, MA 02110-1301, USA.
  */
 
 
@@ -26,19 +27,100 @@
 
 #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_NONE   	= 0,
-  GST_FORMAT_DEFAULT   	= 1,
-  GST_FORMAT_BYTES   	= 2,
-  GST_FORMAT_TIME 	= 3,
-  GST_FORMAT_BUFFERS	= 4,
-  GST_FORMAT_PERCENT	= 5,
-  /* samples for audio, frames/fields for video */
-  GST_FORMAT_UNIT 	= 6,
+  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__ */