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183 lines
7.4 KiB
C
183 lines
7.4 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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* 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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#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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