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3e1e367954
Original commit message from CVS: This is a major update to the dparams api - I think it is now much cleaner and the app-side is much easier to use. highlights are: - GParamSpecs are now used throughout to define dparams - currently limited to supporting types gfloat, gint and gint64. this should cover 99% of cases and new types can be added in the future - application-side api is now based almost entirely on setting object properties - the smoothing dparam is now a subclass of GstDParam - array-mode is not yet implemented but is not forgotton time to start documenting
100 lines
3.4 KiB
C
100 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 <gst/control/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_IS_LOG(dparam) ((dparam)->is_log)
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#define GST_DPARAM_IS_RATE(dparam) ((dparam)->is_rate)
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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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gboolean is_log;
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gboolean is_rate;
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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, gboolean is_log, gboolean is_rate);
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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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