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81 lines
2.9 KiB
C
81 lines
2.9 KiB
C
/* GStreamer
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* Copyright (C) 2001 Steve Baker <stevebaker_org@yahoo.co.uk>
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*
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* unitconvert.c: Conversion between units of measurement
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#ifndef __GST_UNITCONVERT_H__
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#define __GST_UNITCONVERT_H__
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#include <gst/gstobject.h>
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G_BEGIN_DECLS
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#define GST_TYPE_UNIT_CONVERT (gst_unitconv_get_type ())
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#define GST_UNIT_CONVERT(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), GST_TYPE_UNIT_CONVERT,GstUnitConvert))
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#define GST_UNIT_CONVERT_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), GST_TYPE_UNIT_CONVERT,GstUnitConvert))
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#define GST_IS_UNIT_CONVERT(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GST_TYPE_UNIT_CONVERT))
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#define GST_IS_UNIT_CONVERT_CLASS(obj) (G_TYPE_CHECK_CLASS_TYPE ((klass), GST_TYPE_UNIT_CONVERT))
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#define GST_UNIT_CONVERT_NAME(unitconv) (GST_OBJECT_NAME(unitconv))
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#define GST_UNIT_CONVERT_PARENT(unitconv) (GST_OBJECT_PARENT(unitconv))
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typedef struct _GstUnitConvertClass GstUnitConvertClass;
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typedef struct _GstUnitConvert GstUnitConvert;
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typedef void (*GstUnitConvertFunc) (GstUnitConvert * unitconv,
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GValue * from_val, GValue * to_val);
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struct _GstUnitConvert
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{
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GstObject object;
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GHashTable *convert_params;
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GSList *convert_func_chain;
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GSList *temp_gvalues;
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};
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struct _GstUnitConvertClass
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{
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GstObjectClass parent_class;
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/* signal callbacks */
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};
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GType gst_unitconv_get_type (void);
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GstUnitConvert *gst_unitconv_new (void);
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void _gst_unitconv_initialize (void);
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gboolean gst_unitconv_set_convert_units (GstUnitConvert * unitconv,
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gchar * from_unit_named, gchar * to_unit_named);
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gboolean gst_unitconv_convert_value (GstUnitConvert * unitconv,
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GValue * from_value, GValue * to_value);
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GParamSpec *gst_unitconv_unit_spec (gchar * unit_name);
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gboolean gst_unitconv_unit_exists (gchar * unit_name);
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gboolean gst_unitconv_unit_is_logarithmic (gchar * unit_name);
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gboolean gst_unitconv_register_unit (const gchar * domain_name,
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gboolean is_domain_default,
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gboolean is_logarithmic, GParamSpec * unit_spec);
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gboolean gst_unitconv_register_convert_func (gchar * from_unit_named,
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gchar * to_unit_named, GstUnitConvertFunc convert_func);
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gboolean gst_unitconv_register_convert_property (gchar * unit_name,
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GParamSpec * convert_prop_spec);
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G_END_DECLS
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#endif /* __GST_UNITCONVERT_H__ */
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