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25b9d5e292
Original commit message from CVS: fixed a few typos, relabeled introductionary list of types more notes abut dparam changes many comments and notes on dparam implementation new dparams are were not initialized to the default value from param specs
186 lines
7.5 KiB
C
186 lines
7.5 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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* gstdparammanager.h: Dynamic Parameter group 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_DPMAN_H__
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#define __GST_DPMAN_H__
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#include <gst/gstobject.h>
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#include <gst/control/dparamcommon.h>
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#include <gst/control/dparam.h>
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#include <gst/control/unitconvert.h>
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G_BEGIN_DECLS
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#define GST_TYPE_DPMAN (gst_dpman_get_type ())
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#define GST_DPMAN(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), GST_TYPE_DPMAN,GstDParamManager))
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#define GST_DPMAN_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), GST_TYPE_DPMAN,GstDParamManager))
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#define GST_IS_DPMAN(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GST_TYPE_DPMAN))
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#define GST_IS_DPMAN_CLASS(obj) (G_TYPE_CHECK_CLASS_TYPE ((klass), GST_TYPE_DPMAN))
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#define GST_DPMAN_NAME(dpman) (GST_OBJECT_NAME(dpman))
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#define GST_DPMAN_PARENT(dpman) (GST_OBJECT_PARENT(dpman))
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#define GST_DPMAN_DPARAMS(dpman) ((dpman)->dparams)
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#define GST_DPMAN_DPARAMS_LIST(dpman) ((dpman)->dparams_list)
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#define GST_DPMAN_MODE_NAME(dpman) ((dpman)->mode_name)
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#define GST_DPMAN_MODE(dpman) ((dpman)->mode)
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#define GST_DPMAN_RATE(dpman) ((dpman)->rate)
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#define GST_DPMAN_FRAMES_TO_PROCESS(dpman) ((dpman)->frames_to_process)
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#define GST_DPMAN_NEXT_UPDATE_FRAME(dpman) ((dpman)->next_update_frame)
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typedef enum {
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GST_DPMAN_CALLBACK,
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GST_DPMAN_DIRECT,
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GST_DPMAN_ARRAY
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} GstDPMUpdateMethod;
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typedef struct _GstDParamManagerClass GstDParamManagerClass;
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typedef struct _GstDPMMode GstDPMMode;
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typedef struct _GstDParamWrapper GstDParamWrapper;
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typedef struct _GstDParamAsyncToUpdate GstDParamAsyncToUpdate;
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typedef gboolean (*GstDPMModePreProcessFunction) (GstDParamManager *dpman, guint frames, gint64 timestamp);
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typedef gboolean (*GstDPMModeProcessFunction) (GstDParamManager *dpman, guint frame_count);
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typedef void (*GstDPMModeSetupFunction) (GstDParamManager *dpman);
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typedef void (*GstDPMModeTeardownFunction) (GstDParamManager *dpman);
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typedef void (*GstDPMUpdateFunction) (const GValue *value, gpointer data);
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struct _GstDParamManager {
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GstObject object;
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GHashTable *dparams;
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GList *dparams_list;
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/* mode state */
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GstDPMMode* mode;
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gchar *mode_name;
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guint frames_to_process; /* number of frames in the current buffer */
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guint next_update_frame; /* frame when the next update is required */
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/* the following data is only used for async mode */
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guint rate; /* the frame/sample rate - */
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guint rate_ratio; /* used to convert between samples and time */
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guint num_frames; /* number of frames in the current buffer */
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gint64 time_buffer_ends;
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gint64 time_buffer_starts;
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};
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struct _GstDParamManagerClass {
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GstObjectClass parent_class;
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GHashTable *modes;
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/* signal callbacks */
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void (*new_required_dparam) (GstDParamManager *dpman, const gchar* dparam_name);
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};
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struct _GstDPMMode {
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GstDPMModePreProcessFunction preprocessfunc;
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GstDPMModeProcessFunction processfunc;
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GstDPMModeSetupFunction setupfunc;
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GstDPMModeTeardownFunction teardownfunc;
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};
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struct _GstDParamWrapper {
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GParamSpec* param_spec;
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GValue *value;
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GstDParam *dparam;
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guint next_update_frame;
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GstDPMUpdateMethod update_method;
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gpointer update_data;
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GstDPMUpdateFunction update_func;
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gchar *unit_name;
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GstDParamUpdateInfo update_info;
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};
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struct _GstDParamAsyncToUpdate {
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guint frame;
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GValue *value;
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GstDParamWrapper *dpwrap;
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};
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#define GST_DPMAN_PREPROCESSFUNC(dpman) (((dpman)->mode)->preprocessfunc)
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#define GST_DPMAN_PROCESSFUNC(dpman) (((dpman)->mode)->processfunc)
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#define GST_DPMAN_SETUPFUNC(dpman) (((dpman)->mode)->setupfunc)
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#define GST_DPMAN_TEARDOWNFUNC(dpman) (((dpman)->mode)->teardownfunc)
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#define GST_DPMAN_PREPROCESS(dpman, buffer_size, timestamp) \
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(GST_DPMAN_PREPROCESSFUNC(dpman)(dpman, buffer_size, timestamp))
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#define GST_DPMAN_PROCESS(dpman, frame_count) \
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(frame_count < dpman->next_update_frame || \
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(dpman->next_update_frame < dpman->num_frames \
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&& (GST_DPMAN_PROCESSFUNC(dpman)(dpman, frame_count))))
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/* FIXME: this should pass dpwrap->dparam as the first arg
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* the first arg in callback is usually object that triggered the callback
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*/
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#define GST_DPMAN_CALLBACK_UPDATE(dpwrap, value) ((dpwrap->update_func)(value, dpwrap->update_data))
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void _gst_dpman_initialize(void);
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GType gst_dpman_get_type (void);
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GstDParamManager* gst_dpman_new (gchar *name, GstElement *parent);
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void gst_dpman_set_parent (GstDParamManager *dpman, GstElement *parent);
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GstDParamManager* gst_dpman_get_manager (GstElement *parent);
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gboolean gst_dpman_add_required_dparam_callback (GstDParamManager *dpman,
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GParamSpec *param_spec,
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gchar *unit_name,
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GstDPMUpdateFunction update_func,
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gpointer update_data);
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gboolean gst_dpman_add_required_dparam_direct (GstDParamManager *dpman,
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GParamSpec *param_spec,
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gchar *unit_name,
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gpointer update_data);
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gboolean gst_dpman_add_required_dparam_array (GstDParamManager *dpman,
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GParamSpec *param_spec,
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gchar *unit_name,
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gpointer update_data);
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void gst_dpman_remove_required_dparam (GstDParamManager *dpman, const gchar *dparam_name);
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gboolean gst_dpman_attach_dparam (GstDParamManager *dpman, const gchar *dparam_name, GstDParam *dparam);
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void gst_dpman_detach_dparam (GstDParamManager *dpman, const gchar *dparam_name);
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GstDParam* gst_dpman_get_dparam(GstDParamManager *dpman, const gchar *dparam_name);
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GType gst_dpman_get_dparam_type (GstDParamManager *dpman, const gchar *dparam_name);
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GParamSpec** gst_dpman_list_dparam_specs(GstDParamManager *dpman);
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GParamSpec* gst_dpman_get_param_spec (GstDParamManager *dpman, const gchar *dparam_name);
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void gst_dpman_dparam_spec_has_changed (GstDParamManager *dpman, const gchar *dparam_name);
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void gst_dpman_set_rate(GstDParamManager *dpman, gint rate);
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void gst_dpman_bypass_dparam(GstDParamManager *dpman, const gchar *dparam_name);
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gboolean gst_dpman_set_mode(GstDParamManager *dpman, gchar *modename);
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void gst_dpman_register_mode (GstDParamManagerClass *klass,
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gchar *modename,
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GstDPMModePreProcessFunction preprocessfunc,
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GstDPMModeProcessFunction processfunc,
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GstDPMModeSetupFunction setupfunc,
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GstDPMModeTeardownFunction teardownfunc);
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G_END_DECLS
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#endif /* __GST_DPMAN_H__ */
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