mirror of
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).
101 lines
3.4 KiB
C
101 lines
3.4 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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* gstdparam.h: Dynamic Parameter functionality
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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_DPARAM_H__
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#define __GST_DPARAM_H__
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#include <gst/gstobject.h>
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#include <gst/gstprops.h>
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#include "dparamcommon.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_DPARAM (gst_dparam_get_type ())
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#define GST_DPARAM(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), GST_TYPE_DPARAM,GstDParam))
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#define GST_DPARAM_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), GST_TYPE_DPARAM,GstDParam))
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#define GST_IS_DPARAM(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GST_TYPE_DPARAM))
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#define GST_IS_DPARAM_CLASS(obj) (G_TYPE_CHECK_CLASS_TYPE ((klass), GST_TYPE_DPARAM))
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#define GST_DPARAM_NAME(dparam) (GST_OBJECT_NAME(dparam))
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#define GST_DPARAM_PARENT(dparam) (GST_OBJECT_PARENT(dparam))
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#define GST_DPARAM_CHANGE_VALUE(dparam) ((dparam)->change_value)
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#define GST_DPARAM_PARAM_SPEC(dparam) ((dparam)->param_spec)
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#define GST_DPARAM_MANAGER(dparam) ((dparam)->manager)
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#define GST_DPARAM_TYPE(dparam) ((dparam)->type)
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#define GST_DPARAM_UNIT_NAME(dparam) ((dparam)->unit_name)
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#define GST_DPARAM_IS_LOG(dparam) ((dparam)->is_log)
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#define GST_DPARAM_META_VALUES(dparam) ((dparam)->meta_values)
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#define GST_DPARAM_META_PARAM_SPECS(dparam) ((dparam)->meta_param_specs)
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#define GST_DPARAM_LOCK(dparam) (g_mutex_lock((dparam)->lock))
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#define GST_DPARAM_UNLOCK(dparam) (g_mutex_unlock((dparam)->lock))
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#define GST_DPARAM_READY_FOR_UPDATE(dparam) ((dparam)->ready_for_update)
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#define GST_DPARAM_NEXT_UPDATE_TIMESTAMP(dparam) ((dparam)->next_update_timestamp)
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#define GST_DPARAM_DO_UPDATE(dparam, timestamp, value) \
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((dparam->do_update_func)(dparam, timestamp, value))
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typedef struct _GstDParamClass GstDParamClass;
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typedef void (*GstDParamDoUpdateFunction) (GstDParam *dparam, gint64 timestamp, GValue *value);
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struct _GstDParam {
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GstObject object;
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GstDParamDoUpdateFunction do_update_func;
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GMutex *lock;
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gfloat value_float;
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gint value_int;
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gint64 value_int64;
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GstDParamManager *manager;
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GParamSpec *param_spec;
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GType type;
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gboolean ready_for_update;
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gint64 next_update_timestamp;
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gchar *unit_name;
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gboolean is_log;
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};
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struct _GstDParamClass {
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GstObjectClass parent_class;
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/* signal callbacks */
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};
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GType gst_dparam_get_type (void);
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GstDParam* gst_dparam_new (GType type);
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void gst_dparam_attach (GstDParam *dparam, GstDParamManager *manager, GParamSpec *param_spec, gchar *unit_name);
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void gst_dparam_detach (GstDParam *dparam);
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void gst_dparam_do_update_default (GstDParam *dparam, gint64 timestamp, GValue *value);
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#ifdef __cplusplus
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}
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#endif /* __cplusplus */
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#endif /* __GST_DPARAM_H__ */
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