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https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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a15b5ccc6d
Original commit message from CVS: added unitconvert which has a registry of Units of Measurement and an api to convert one unit to another. Any required dparam now needs to specify what unit it represents so that an app can convert it to some other unit for presentation/other purposes. Also added GST_DPMAN_PROCESS_CHUNK macro for elements which don't process their audio one sample at a time (ie, ladspa).
82 lines
3 KiB
C
82 lines
3 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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#ifdef __cplusplus
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extern "C" {
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#endif /* __cplusplus */
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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, GValue *from_val, GValue *to_val);
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struct _GstUnitConvert {
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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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GstObjectClass parent_class;
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/* signal callbacks */
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};
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GstUnitConvert* gst_unitconv_new ();
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void _gst_unitconv_initialize (void);
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gboolean gst_unitconv_set_convert_units(GstUnitConvert *unitconv, gchar *from_unit_named, gchar *to_unit_named);
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gboolean gst_unitconv_convert_value(GstUnitConvert *unitconv, 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,
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GParamSpec *unit_spec);
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gboolean gst_unitconv_register_convert_func(gchar *from_unit_named, gchar *to_unit_named, GstUnitConvertFunc convert_func);
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gboolean gst_unitconv_register_convert_property(gchar *unit_name, GParamSpec *convert_prop_spec);
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#ifdef __cplusplus
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}
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#endif /* __cplusplus */
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#endif /* __GST_UNITCONVERT_H__ */
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