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https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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5be7eb77cf
Original commit message from CVS: all info to describe a dparam is now in the GstDParamSpec struct. The resemblance to LADSPA descriptors is intentional
145 lines
4.7 KiB
C
145 lines
4.7 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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#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_VALUE(dparam) ((dparam)->value)
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#define GST_DPARAM_SPEC(dparam) ((dparam)->spec)
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#define GST_DPARAM_TYPE(dparam) ((dparam)->type)
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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_DEFAULT_UPDATE_PERIOD(dparam) ((dparam)->default_update_period)
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#define GST_DPARAM_NEXT_UPDATE_TIMESTAMP(dparam) ((dparam)->next_update_timestamp)
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#define GST_DPARAM_LAST_UPDATE_TIMESTAMP(dparam) ((dparam)->last_update_timestamp)
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#define GST_DPARAM_GET_POINT(dparam, timestamp) \
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((dparam->get_point_func)(dparam, timestamp))
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#define GST_DPARAM_FIND_POINT(dparam, timestamp, search_flag) \
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((dparam->find_point_func)(dparam, data, search_flag))
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#define GST_DPARAM_DO_UPDATE(dparam, timestamp) \
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((dparam->do_update_func)(dparam, timestamp))
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#define GST_DPARAM_INSERT_POINT(dparam, timestamp) \
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((dparam->insert_point_func)(dparam, timestamp))
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#define GST_DPARAM_REMOVE_POINT(dparam, data) \
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((dparam->remove_point_func)(dparam, data))
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typedef enum {
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GST_DPARAM_CLOSEST,
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GST_DPARAM_CLOSEST_AFTER,
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GST_DPARAM_CLOSEST_BEFORE,
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GST_DPARAM_EXACT,
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} GstDParamSearchFlag;
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typedef enum {
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GST_DPARAM_NOT_FOUND = 0,
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GST_DPARAM_FOUND_EXACT,
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GST_DPARAM_FOUND_CLOSEST,
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} GstDParamSearchResult;
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typedef struct _GstDParam GstDParam;
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typedef struct _GstDParamClass GstDParamClass;
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typedef struct _GstDParamSpec GstDParamSpec;
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typedef GValue** (*GstDParamInsertPointFunction) (GstDParam *dparam, guint64 timestamp);
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typedef void (*GstDParamRemovePointFunction) (GstDParam *dparam, GValue** point);
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typedef GValue** (*GstDParamGetPointFunction) (GstDParam *dparam, gint64 timestamp);
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typedef GstDParamSearchResult (*GstDParamFindPointFunction) (GstDParam *dparam, gint64 *timestamp, GstDParamSearchFlag search_flag);
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typedef void (*GstDParamDoUpdateFunction) (GstDParam *dparam, gint64 timestamp);
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struct _GstDParam {
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GstObject object;
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GstDParamGetPointFunction get_point_func;
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GstDParamFindPointFunction find_point_func;
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GstDParamDoUpdateFunction do_update_func;
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GstDParamInsertPointFunction insert_point_func;
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GstDParamRemovePointFunction remove_point_func;
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GMutex *lock;
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GValue *value;
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GstDParamSpec *spec;
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GValue **point;
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GType type;
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gint64 last_update_timestamp;
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gint64 next_update_timestamp;
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gint64 default_update_period;
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gboolean ready_for_update;
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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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struct _GstDParamSpec {
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gchar *dparam_name;
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gchar *unit_name;
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GValue *min_val;
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GValue *max_val;
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GValue *default_val;
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gboolean is_log;
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gboolean is_rate;
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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, GstObject *parent, GValue *value, GstDParamSpec *spec);
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GValue** gst_dparam_new_value_array(GType type, ...);
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void gst_dparam_set_value_from_string(GValue *value, const gchar *value_str);
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/**********************
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* GstDParamSmooth
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**********************/
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GstDParam* gst_dparam_smooth_new (GType type);
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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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