--- /dev/null
+/* GStreamer
+ * Copyright (C) 2001 Steve Baker <stevebaker_org@yahoo.co.uk>
+ *
+ * gstdparam.c: Dynamic Parameter functionality
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+
+#include <math.h>
+#include <string.h>
+#include <gst/gstinfo.h>
+
+#include "gstdparam.h"
+#include "gstdparammanager.h"
+
+static void gst_dparam_class_init (GstDParamClass *klass);
+static void gst_dparam_init (GstDParam *dparam);
+
+static void gst_dparam_do_update_realtime (GstDParam *dparam, gint64 timestamp);
+static GValue** gst_dparam_get_point_realtime (GstDParam *dparam, gint64 timestamp);
+
+GType
+gst_dparam_get_type(void) {
+ static GType dparam_type = 0;
+
+ if (!dparam_type) {
+ static const GTypeInfo dparam_info = {
+ sizeof(GstDParamClass),
+ NULL,
+ NULL,
+ (GClassInitFunc)gst_dparam_class_init,
+ NULL,
+ NULL,
+ sizeof(GstDParam),
+ 0,
+ (GInstanceInitFunc)gst_dparam_init,
+ };
+ dparam_type = g_type_register_static(GST_TYPE_OBJECT, "GstDParam", &dparam_info, 0);
+ }
+ return dparam_type;
+}
+
+static void
+gst_dparam_class_init (GstDParamClass *klass)
+{
+ GObjectClass *gobject_class;
+ GstDParamClass *dparam_class;
+ GstObjectClass *gstobject_class;
+
+ gobject_class = (GObjectClass*)klass;
+ dparam_class = (GstDParamClass*)klass;
+ gstobject_class = (GstObjectClass*) klass;
+
+ //gstobject_class->save_thyself = gst_dparam_save_thyself;
+
+}
+
+static void
+gst_dparam_init (GstDParam *dparam)
+{
+ g_return_if_fail (dparam != NULL);
+ GST_DPARAM_VALUE(dparam) = NULL;
+ GST_DPARAM_TYPE(dparam) = 0;
+ GST_DPARAM_NEXT_UPDATE_TIMESTAMP(dparam)=0LL;
+ GST_DPARAM_LAST_UPDATE_TIMESTAMP(dparam)=0LL;
+ GST_DPARAM_READY_FOR_UPDATE(dparam)=FALSE;
+ dparam->lock = g_mutex_new ();
+}
+
+/**
+ * gst_dparam_new:
+ * @type: the type that this dparam will store
+ *
+ * Returns: a new instance of GstDParam
+ */
+GstDParam*
+gst_dparam_new (GType type)
+{
+ GstDParam *dparam;
+
+ dparam = g_object_new (gst_dparam_get_type (), NULL);
+ dparam->do_update_func = gst_dparam_do_update_realtime;
+ dparam->get_point_func = gst_dparam_get_point_realtime;
+
+ dparam->point = gst_dparam_new_value_array(type, 0);
+ GST_DPARAM_TYPE(dparam) = type;
+
+ return dparam;
+}
+
+/**
+ * gst_dparam_attach
+ * @dparam: GstDParam instance
+ * @parent: the GstDParamManager that this dparam belongs to
+ *
+ */
+void
+gst_dparam_attach (GstDParam *dparam, GstObject *parent, GValue *value, GstDParamSpec *spec)
+{
+
+ g_return_if_fail (dparam != NULL);
+ g_return_if_fail (GST_IS_DPARAM (dparam));
+ g_return_if_fail (GST_DPARAM_PARENT (dparam) == NULL);
+ g_return_if_fail (parent != NULL);
+ g_return_if_fail (G_IS_OBJECT (parent));
+ g_return_if_fail (GST_IS_DPMAN (parent));
+ g_return_if_fail ((gpointer)dparam != (gpointer)parent);
+ g_return_if_fail (value != NULL);
+ g_return_if_fail (spec != NULL);
+ g_return_if_fail (GST_DPARAM_TYPE(dparam) == G_VALUE_TYPE(value));
+
+ GST_DPARAM_NAME(dparam) = spec->dparam_name;
+ GST_DPARAM_VALUE(dparam) = value;
+ GST_DPARAM_SPEC(dparam) = spec;
+ gst_object_set_parent (GST_OBJECT (dparam), parent);
+}
+
+/**
+ * gst_dparam_new_value_array
+ * @type: the type of the first GValue in the array
+ * @...: the type of other GValues in the array
+ *
+ * The list of types should be terminated with a 0.
+ * If the type of a value is not yet known then use G_TYPE_NONE .
+ *
+ * Returns: an newly created array of GValues
+ */
+GValue**
+gst_dparam_new_value_array(GType type, ...)
+{
+ GValue **point;
+ GValue *value;
+ guint x;
+ guint values_length = 0;
+ va_list var_args;
+ GType each_type;
+
+ va_start (var_args, type);
+ each_type = type;
+ while (each_type){
+ values_length++;
+ each_type = va_arg (var_args, GType);
+ }
+ va_end (var_args);
+
+ point = g_new0(GValue*,values_length + 1);
+
+ va_start (var_args, type);
+ each_type = type;
+ for (x=0 ; x < values_length ; x++){
+ value = g_new0(GValue,1);
+ if (each_type != G_TYPE_NONE){
+ g_value_init(value, each_type);
+ }
+ point[x] = value;
+ each_type = va_arg (var_args, GType);
+ }
+ point[values_length] = NULL;
+ va_end (var_args);
+
+ GST_DEBUG(GST_CAT_PARAMS, "array with %d values created\n", values_length);
+
+ return point;
+}
+
+void
+gst_dparam_set_value_from_string(GValue *value, const gchar *value_str)
+{
+
+ g_return_if_fail(value != NULL);
+ g_return_if_fail(value_str != NULL);
+
+ GST_DEBUG(GST_CAT_PARAMS, "parsing '%s' to type %s\n", value_str, g_type_name(G_VALUE_TYPE(value)));
+
+ switch (G_VALUE_TYPE(value)) {
+ case G_TYPE_STRING:
+ g_value_set_string(value, g_strdup(value_str));
+ break;
+ case G_TYPE_ENUM:
+ case G_TYPE_INT: {
+ gint i;
+ sscanf (value_str, "%d", &i);
+ g_value_set_int(value, i);
+ break;
+ }
+ case G_TYPE_UINT: {
+ guint i;
+ sscanf (value_str, "%u", &i);
+ g_value_set_uint(value, i);
+ break;
+ }
+ case G_TYPE_LONG: {
+ glong i;
+ sscanf (value_str, "%ld", &i);
+ g_value_set_long(value, i);
+ break;
+ }
+ case G_TYPE_ULONG: {
+ gulong i;
+ sscanf (value_str, "%lu", &i);
+ g_value_set_ulong(value, i);
+ break;
+ }
+ case G_TYPE_BOOLEAN: {
+ gboolean i = FALSE;
+ if (!strncmp ("true", value_str, 4)) i = TRUE;
+ g_value_set_boolean(value, i);
+ break;
+ }
+ case G_TYPE_CHAR: {
+ gchar i;
+ sscanf (value_str, "%c", &i);
+ g_value_set_char(value, i);
+ break;
+ }
+ case G_TYPE_UCHAR: {
+ guchar i;
+ sscanf (value_str, "%c", &i);
+ g_value_set_uchar(value, i);
+ break;
+ }
+ case G_TYPE_FLOAT: {
+ gfloat i;
+ sscanf (value_str, "%f", &i);
+ g_value_set_float(value, i);
+ break;
+ }
+ case G_TYPE_DOUBLE: {
+ gfloat i;
+ sscanf (value_str, "%g", &i);
+ g_value_set_double(value, (gdouble)i);
+ break;
+ }
+ default:
+ break;
+ }
+}
+
+static void
+gst_dparam_do_update_realtime (GstDParam *dparam, gint64 timestamp)
+{
+ GST_DPARAM_LOCK(dparam);
+ GST_DPARAM_READY_FOR_UPDATE(dparam) = FALSE;
+ GST_DEBUG(GST_CAT_PARAMS, "updating value for %s(%p)\n",GST_DPARAM_NAME (dparam),dparam);
+ g_value_copy(dparam->point[0], GST_DPARAM_VALUE(dparam));
+ GST_DPARAM_UNLOCK(dparam);
+}
+
+static GValue**
+gst_dparam_get_point_realtime (GstDParam *dparam, gint64 timestamp)
+{
+ GST_DEBUG(GST_CAT_PARAMS, "getting point for %s(%p)\n",GST_DPARAM_NAME (dparam),dparam);
+ return dparam->point;
+}
+
+/**********************
+ * GstDParamSmooth
+ **********************/
+
+static void gst_dparam_do_update_smooth (GstDParam *dparam, gint64 timestamp);
+static GValue** gst_dparam_get_point_smooth (GstDParam *dparam, gint64 timestamp);
+
+/**
+ * gst_dparam_smooth_new:
+ * @type: the type that this dparam will store
+ *
+ * Returns: a new instance of GstDParamSmooth
+ */
+GstDParam*
+gst_dparam_smooth_new (GType type)
+{
+ GstDParam *dparam;
+
+ dparam = g_object_new (gst_dparam_get_type (), NULL);
+
+ dparam->do_update_func = gst_dparam_do_update_smooth;
+ dparam->get_point_func = gst_dparam_get_point_smooth;
+
+ dparam->point = gst_dparam_new_value_array(type, type, G_TYPE_FLOAT, 0);
+ GST_DPARAM_TYPE(dparam) = type;
+
+ return dparam;
+}
+
+static void
+gst_dparam_do_update_smooth (GstDParam *dparam, gint64 timestamp)
+{
+ gint64 time_diff;
+ gfloat time_ratio;
+
+ time_diff = MIN(GST_DPARAM_DEFAULT_UPDATE_PERIOD(dparam),
+ timestamp - GST_DPARAM_LAST_UPDATE_TIMESTAMP(dparam));
+
+ time_ratio = (gfloat)time_diff / g_value_get_float(dparam->point[2]);
+
+ GST_DPARAM_LOCK(dparam);
+
+ GST_DPARAM_LAST_UPDATE_TIMESTAMP(dparam) = GST_DPARAM_NEXT_UPDATE_TIMESTAMP(dparam);
+ while(GST_DPARAM_NEXT_UPDATE_TIMESTAMP(dparam) <= timestamp){
+ GST_DPARAM_NEXT_UPDATE_TIMESTAMP(dparam) += GST_DPARAM_DEFAULT_UPDATE_PERIOD(dparam);
+ }
+ GST_DEBUG(GST_CAT_PARAMS, "last:%lld current:%lld next:%lld\n",
+ GST_DPARAM_LAST_UPDATE_TIMESTAMP(dparam), timestamp, GST_DPARAM_NEXT_UPDATE_TIMESTAMP(dparam));
+
+
+ switch (G_VALUE_TYPE(GST_DPARAM_VALUE(dparam))){
+ case G_TYPE_FLOAT: {
+ gfloat current, target, max_change, current_diff, final_val;
+
+ target = g_value_get_float(dparam->point[0]);
+ current = g_value_get_float(GST_DPARAM_VALUE(dparam));
+ max_change = time_ratio * g_value_get_float(dparam->point[1]);
+
+ GST_DEBUG(GST_CAT_PARAMS, "target:%f current:%f max_change:%f \n",
+ target, current, max_change);
+
+ if (dparam->spec->is_log){
+ gfloat current_log;
+ current_log = log(current);
+ current_diff = ABS(current_log - log(target));
+ if (current_diff > max_change)
+ final_val = (target < current) ? exp(current_log-max_change) : exp(current_log+max_change);
+ else
+ final_val = target;
+ }
+ else {
+ current_diff = ABS (current - target);
+ if (current_diff > max_change)
+ final_val = (target < current) ? current-max_change : current+max_change;
+ else
+ final_val = target;
+ }
+
+ GST_DPARAM_READY_FOR_UPDATE(dparam) = (current_diff > max_change);
+ g_value_set_float(GST_DPARAM_VALUE(dparam), final_val);
+
+ break;
+ }
+ default:
+ break;
+ }
+
+
+ //GST_DEBUG(GST_CAT_PARAMS, "smooth update for %s(%p): %f\n",
+ // GST_DPARAM_NAME (dparam),dparam, g_value_get_float(GST_DPARAM_VALUE(dparam)));
+
+ GST_DPARAM_UNLOCK(dparam);
+}
+
+static GValue**
+gst_dparam_get_point_smooth (GstDParam *dparam, gint64 timestamp)
+{
+ GST_DEBUG(GST_CAT_PARAMS, "getting point for %s(%p)\n",GST_DPARAM_NAME (dparam),dparam);
+ return dparam->point;
+}
--- /dev/null
+/* GStreamer
+ * Copyright (C) 2001 Steve Baker <stevebaker_org@yahoo.co.uk>
+ *
+ * gstdparam.h: Dynamic Parameter functionality
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+
+#ifndef __GST_DPARAM_H__
+#define __GST_DPARAM_H__
+
+#include <gst/gstobject.h>
+#include <gst/gstprops.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif /* __cplusplus */
+
+
+#define GST_TYPE_DPARAM (gst_dparam_get_type ())
+#define GST_DPARAM(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), GST_TYPE_DPARAM,GstDParam))
+#define GST_DPARAM_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), GST_TYPE_DPARAM,GstDParam))
+#define GST_IS_DPARAM(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GST_TYPE_DPARAM))
+#define GST_IS_DPARAM_CLASS(obj) (G_TYPE_CHECK_CLASS_TYPE ((klass), GST_TYPE_DPARAM))
+
+#define GST_DPARAM_NAME(dparam) (GST_OBJECT_NAME(dparam))
+#define GST_DPARAM_PARENT(dparam) (GST_OBJECT_PARENT(dparam))
+#define GST_DPARAM_VALUE(dparam) ((dparam)->value)
+#define GST_DPARAM_SPEC(dparam) ((dparam)->spec)
+#define GST_DPARAM_TYPE(dparam) ((dparam)->type)
+
+#define GST_DPARAM_LOCK(dparam) (g_mutex_lock((dparam)->lock))
+#define GST_DPARAM_UNLOCK(dparam) (g_mutex_unlock((dparam)->lock))
+
+#define GST_DPARAM_READY_FOR_UPDATE(dparam) ((dparam)->ready_for_update)
+#define GST_DPARAM_DEFAULT_UPDATE_PERIOD(dparam) ((dparam)->default_update_period)
+#define GST_DPARAM_NEXT_UPDATE_TIMESTAMP(dparam) ((dparam)->next_update_timestamp)
+#define GST_DPARAM_LAST_UPDATE_TIMESTAMP(dparam) ((dparam)->last_update_timestamp)
+
+#define GST_DPARAM_GET_POINT(dparam, timestamp) \
+ ((dparam->get_point_func)(dparam, timestamp))
+
+#define GST_DPARAM_FIND_POINT(dparam, timestamp, search_flag) \
+ ((dparam->find_point_func)(dparam, data, search_flag))
+
+#define GST_DPARAM_DO_UPDATE(dparam, timestamp) \
+ ((dparam->do_update_func)(dparam, timestamp))
+
+#define GST_DPARAM_INSERT_POINT(dparam, timestamp) \
+ ((dparam->insert_point_func)(dparam, timestamp))
+
+#define GST_DPARAM_REMOVE_POINT(dparam, data) \
+ ((dparam->remove_point_func)(dparam, data))
+
+typedef enum {
+ GST_DPARAM_CLOSEST,
+ GST_DPARAM_CLOSEST_AFTER,
+ GST_DPARAM_CLOSEST_BEFORE,
+ GST_DPARAM_EXACT,
+} GstDParamSearchFlag;
+
+typedef enum {
+ GST_DPARAM_NOT_FOUND = 0,
+ GST_DPARAM_FOUND_EXACT,
+ GST_DPARAM_FOUND_CLOSEST,
+} GstDParamSearchResult;
+
+typedef struct _GstDParam GstDParam;
+typedef struct _GstDParamClass GstDParamClass;
+typedef struct _GstDParamSpec GstDParamSpec;
+
+typedef GValue** (*GstDParamInsertPointFunction) (GstDParam *dparam, guint64 timestamp);
+typedef void (*GstDParamRemovePointFunction) (GstDParam *dparam, GValue** point);
+typedef GValue** (*GstDParamGetPointFunction) (GstDParam *dparam, gint64 timestamp);
+typedef GstDParamSearchResult (*GstDParamFindPointFunction) (GstDParam *dparam, gint64 *timestamp, GstDParamSearchFlag search_flag);
+
+typedef void (*GstDParamDoUpdateFunction) (GstDParam *dparam, gint64 timestamp);
+
+struct _GstDParam {
+ GstObject object;
+
+ GstDParamGetPointFunction get_point_func;
+ GstDParamFindPointFunction find_point_func;
+
+ GstDParamDoUpdateFunction do_update_func;
+
+ GstDParamInsertPointFunction insert_point_func;
+ GstDParamRemovePointFunction remove_point_func;
+
+ GMutex *lock;
+ GValue *value;
+ GstDParamSpec *spec;
+ GValue **point;
+ GType type;
+ gint64 last_update_timestamp;
+ gint64 next_update_timestamp;
+ gint64 default_update_period;
+ gboolean ready_for_update;
+};
+
+struct _GstDParamClass {
+ GstObjectClass parent_class;
+
+ /* signal callbacks */
+};
+
+struct _GstDParamSpec {
+ gchar *dparam_name;
+ gchar *unit_name;
+ GValue *min_val;
+ GValue *max_val;
+ GValue *default_val;
+ gboolean is_log;
+ gboolean is_rate;
+};
+
+GType gst_dparam_get_type (void);
+GstDParam* gst_dparam_new (GType type);
+void gst_dparam_attach (GstDParam *dparam, GstObject *parent, GValue *value, GstDParamSpec *spec);
+GValue** gst_dparam_new_value_array(GType type, ...);
+void gst_dparam_set_value_from_string(GValue *value, const gchar *value_str);
+
+/**********************
+ * GstDParamSmooth
+ **********************/
+
+GstDParam* gst_dparam_smooth_new (GType type);
+
+#ifdef __cplusplus
+}
+#endif /* __cplusplus */
+
+#endif /* __GST_DPARAM_H__ */
--- /dev/null
+/* GStreamer
+ * Copyright (C) 2001 Steve Baker <stevebaker_org@yahoo.co.uk>
+ *
+ * gstdparammanager.c: Dynamic Parameter group functionality
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+
+#include "gstdparammanager.h"
+#include <gst/gstelement.h>
+#include <gst/gstinfo.h>
+
+static GHashTable *_element_registry;
+
+static void gst_dpman_class_init (GstDParamManagerClass *klass);
+static void gst_dpman_init (GstDParamManager *dpman);
+static GstDParamWrapper* gst_dpman_new_wrapper(GstDParamManager *dpman, gchar *dparam_name, GType type, GstDPMUpdateMethod update_method);
+static GstDParamWrapper* gst_dpman_get_wrapper(GstDParamManager *dpman, gchar *dparam_name);
+static void gst_dpman_state_change (GstElement *element, gint state, GstDParamManager *dpman);
+static void gst_dpman_caps_changed (GstPad *pad, GstCaps *caps, GstDParamManager *dpman);
+static guint gst_dpman_preprocess_synchronous(GstDParamManager *dpman, guint frames, gint64 timestamp);
+static guint gst_dpman_preprocess_noop(GstDParamManager *dpman, guint frames, gint64 timestamp);
+static guint gst_dpman_process_noop(GstDParamManager *dpman, guint frame_count);
+
+GType
+gst_dpman_get_type (void)
+{
+ static GType dpman_type = 0;
+
+ if (!dpman_type) {
+ static const GTypeInfo dpman_info = {
+ sizeof(GstDParamManagerClass),
+ NULL,
+ NULL,
+ (GClassInitFunc)gst_dpman_class_init,
+ NULL,
+ NULL,
+ sizeof(GstDParamManager),
+ 0,
+ (GInstanceInitFunc)gst_dpman_init,
+ };
+ dpman_type = g_type_register_static(GST_TYPE_OBJECT, "GstDParamManager", &dpman_info, 0);
+ }
+ return dpman_type;
+}
+
+static void
+gst_dpman_class_init (GstDParamManagerClass *klass)
+{
+ GstObjectClass *gstobject_class;
+ GObjectClass *gobject_class;
+
+ gstobject_class = (GstObjectClass*) klass;
+ gobject_class = (GObjectClass*) klass;
+
+ klass->modes = g_hash_table_new(g_str_hash,g_str_equal);
+ _element_registry = g_hash_table_new(NULL,NULL);
+
+ gst_dpman_register_mode (klass, "synchronous",
+ gst_dpman_preprocess_synchronous, gst_dpman_process_noop, NULL, NULL);
+ gst_dpman_register_mode (klass, "asynchronous",
+ gst_dpman_preprocess_noop, gst_dpman_process_noop, NULL, NULL);
+ gst_dpman_register_mode (klass, "disabled",
+ gst_dpman_preprocess_noop, gst_dpman_process_noop, NULL, NULL);
+
+}
+
+static void
+gst_dpman_init (GstDParamManager *dpman)
+{
+ GST_DPMAN_DPARAMS(dpman) = g_hash_table_new(g_str_hash,g_str_equal);
+ GST_DPMAN_DPARAMS_LIST(dpman) = NULL;
+ GST_DPMAN_NAME(dpman) = NULL;
+ GST_DPMAN_PARENT(dpman) = NULL;
+ GST_DPMAN_MODE_NAME(dpman) = NULL;
+ GST_DPMAN_MODE(dpman) = NULL;
+ GST_DPMAN_MODE_DATA(dpman) = NULL;
+ GST_DPMAN_RATE(dpman) = 0;
+}
+
+/**
+ * gst_dpman_new:
+ * @name: name of the GstDParamManager instance
+ * @parent: element which created this instance
+ *
+ * Returns: a new instance of GstDParamManager
+ */
+GstDParamManager*
+gst_dpman_new (gchar *name, GstElement *parent)
+{
+ GstDParamManager *dpman;
+
+ g_return_val_if_fail (name != NULL, NULL);
+
+ dpman = g_object_new (gst_dpman_get_type (), NULL);
+ gst_object_set_name (GST_OBJECT (dpman), name);
+ gst_dpman_set_parent(dpman, parent);
+
+ gst_dpman_set_mode(dpman, "disabled");
+
+ return dpman;
+}
+
+/**
+ * gst_dpman_add_required_dparam_callback:
+ * @dpman: GstDParamManager instance
+ * @dparam_name: a parameter name unique to this GstDParamManager
+ * @type: the GValue type that this parameter will store
+ * @update_func: callback to update the element with the new value
+ * @update_data: will be included in the call to update_func
+ *
+ * Returns: true if it was successfully added
+ */
+gboolean
+gst_dpman_add_required_dparam_callback (GstDParamManager *dpman,
+ gchar *dparam_name,
+ GType type,
+ GstDPMUpdateFunction update_func,
+ gpointer update_data)
+{
+ GstDParamWrapper* dpwrap;
+
+ g_return_val_if_fail (dpman != NULL, FALSE);
+ g_return_val_if_fail (GST_IS_DPMAN (dpman), FALSE);
+ g_return_val_if_fail (update_func != NULL, FALSE);
+
+ dpwrap = gst_dpman_new_wrapper(dpman, dparam_name, type, GST_DPMAN_CALLBACK);
+
+ g_return_val_if_fail (dpwrap != NULL, FALSE);
+
+ GST_DEBUG(GST_CAT_PARAMS,"adding required callback dparam '%s' of type %s\n", dparam_name, g_type_name(type));
+
+ dpwrap->update_func = update_func;
+ dpwrap->update_data = update_data;
+
+ return TRUE;
+}
+
+/**
+ * gst_dpman_add_required_dparam_direct:
+ * @dpman: GstDParamManager instance
+ * @dparam_name: a parameter name unique to this GstDParamManager
+ * @type: the GValue type that this parameter will store
+ * @update_data: pointer to the member to be updated
+ *
+ * Returns: true if it was successfully added
+ */
+gboolean
+gst_dpman_add_required_dparam_direct (GstDParamManager *dpman,
+ gchar *dparam_name,
+ GType type,
+ gpointer update_data)
+{
+ GstDParamWrapper* dpwrap;
+
+ g_return_val_if_fail (dpman != NULL, FALSE);
+ g_return_val_if_fail (GST_IS_DPMAN (dpman), FALSE);
+ g_return_val_if_fail (update_data != NULL, FALSE);
+
+ dpwrap = gst_dpman_new_wrapper(dpman, dparam_name, type, GST_DPMAN_DIRECT);
+
+ g_return_val_if_fail (dpwrap != NULL, FALSE);
+
+ GST_DEBUG(GST_CAT_PARAMS,"adding required direct dparam '%s' of type %s\n", dparam_name, g_type_name(type));
+
+ dpwrap->update_data = update_data;
+
+ return TRUE;
+}
+
+/**
+ * gst_dpman_add_required_dparam_array:
+ * @dpman: GstDParamManager instance
+ * @dparam_name: a parameter name unique to this GstDParamManager
+ * @type: the GValue type that this parameter will store
+ * @update_data: pointer to where the array will be stored
+ *
+ * Returns: true if it was successfully added
+ */
+gboolean
+gst_dpman_add_required_dparam_array (GstDParamManager *dpman,
+ gchar *dparam_name,
+ GType type,
+ gpointer update_data)
+{
+ GstDParamWrapper* dpwrap;
+
+ g_return_val_if_fail (dpman != NULL, FALSE);
+ g_return_val_if_fail (GST_IS_DPMAN (dpman), FALSE);
+ g_return_val_if_fail (update_data != NULL, FALSE);
+
+ dpwrap = gst_dpman_new_wrapper(dpman, dparam_name, type, GST_DPMAN_ARRAY);
+
+ g_return_val_if_fail (dpwrap != NULL, FALSE);
+
+ GST_DEBUG(GST_CAT_PARAMS,"adding required array dparam '%s' of type %s\n", dparam_name, g_type_name(type));
+
+ dpwrap->update_data = update_data;
+
+ return TRUE;
+}
+
+/**
+ * gst_dpman_remove_required_dparam:
+ * @dpman: GstDParamManager instance
+ * @dparam_name: the name of an existing parameter
+ *
+ */
+void
+gst_dpman_remove_required_dparam (GstDParamManager *dpman, gchar *dparam_name)
+{
+ GstDParamWrapper* dpwrap;
+
+ g_return_if_fail (dpman != NULL);
+ g_return_if_fail (GST_IS_DPMAN (dpman));
+ g_return_if_fail (dparam_name != NULL);
+
+ dpwrap = gst_dpman_get_wrapper(dpman, dparam_name);
+
+ g_return_if_fail(dpwrap != NULL);
+ g_return_if_fail(dpwrap->dparam == NULL);
+
+ GST_DEBUG(GST_CAT_PARAMS, "removing required dparam: %s\n", dparam_name);
+
+ g_hash_table_remove(GST_DPMAN_DPARAMS(dpman), dparam_name);
+ GST_DPMAN_DPARAMS_LIST(dpman) = g_slist_remove(GST_DPMAN_DPARAMS_LIST(dpman), dpwrap);
+
+ g_free(dpwrap->value);
+ g_free(dpwrap);
+}
+
+/**
+ * gst_dpman_attach_dparam:
+ * @dpman: GstDParamManager instance
+ * @dparam_name: a name previously added with gst_dpman_add_required_dparam
+ * @dparam: GstDParam instance to attach
+ *
+ * Returns: true if it was successfully attached
+ */
+gboolean
+gst_dpman_attach_dparam (GstDParamManager *dpman, gchar *dparam_name, GstDParam *dparam)
+{
+ GstDParamWrapper* dpwrap;
+
+ g_return_val_if_fail (dpman != NULL, FALSE);
+ g_return_val_if_fail (GST_IS_DPMAN (dpman), FALSE);
+ g_return_val_if_fail (dparam_name != NULL, FALSE);
+ g_return_val_if_fail (dparam != NULL, FALSE);
+ g_return_val_if_fail (GST_IS_DPARAM (dparam), FALSE);
+ g_return_val_if_fail (dparam != NULL, FALSE);
+
+ dpwrap = gst_dpman_get_wrapper(dpman, dparam_name);
+
+ g_return_val_if_fail(dpwrap != NULL, FALSE);
+ g_return_val_if_fail(dpwrap->value != NULL, FALSE);
+
+ dpwrap->dparam = dparam;
+ gst_dparam_attach(dparam, GST_OBJECT(dpman), dpwrap->value, dpwrap->spec);
+
+ return TRUE;
+}
+
+/**
+ * gst_dpman_dettach_dparam:
+ * @dpman: GstDParamManager instance
+ * @dparam_name: the name of a parameter with a previously attached GstDParam
+ *
+ */
+void
+gst_dpman_dettach_dparam (GstDParamManager *dpman, gchar *dparam_name)
+{
+ GstDParamWrapper* dpwrap;
+
+ g_return_if_fail (dpman != NULL);
+ g_return_if_fail (GST_IS_DPMAN (dpman));
+ g_return_if_fail (dparam_name != NULL);
+
+ dpwrap = gst_dpman_get_wrapper(dpman, dparam_name);
+
+ g_return_if_fail(dpwrap);
+
+ GST_DPARAM_VALUE(dpwrap->dparam) = NULL;
+ GST_DPARAM_NAME(dpwrap->dparam) = NULL;
+ gst_object_unparent (GST_OBJECT(dpwrap->dparam));
+
+ dpwrap->dparam = NULL;
+
+}
+
+/**
+ * gst_dpman_get_dparam:
+ * @dpman: GstDParamManager instance
+ * @name: the name of an existing dparam instance
+ *
+ * Returns: the dparam with the given name - or NULL otherwise
+ */
+GstDParam *
+gst_dpman_get_dparam (GstDParamManager *dpman, gchar *name)
+{
+ GstDParamWrapper* dpwrap;
+
+ g_return_val_if_fail (dpman != NULL, NULL);
+ g_return_val_if_fail (GST_IS_DPMAN (dpman), NULL);
+ g_return_val_if_fail (name != NULL, NULL);
+
+ dpwrap = g_hash_table_lookup(GST_DPMAN_DPARAMS(dpman), name);
+ g_return_val_if_fail (dpwrap != NULL, NULL);
+
+ return dpwrap->dparam;
+}
+
+/**
+ * gst_dpman_get_dparam_type:
+ * @dpman: GstDParamManager instance
+ * @name: the name of dparam
+ *
+ * Returns: the type that this dparam requires/uses
+ */
+GType
+gst_dpman_get_dparam_type (GstDParamManager *dpman, gchar *name)
+{
+ GstDParamWrapper* dpwrap;
+
+ g_return_val_if_fail (dpman != NULL, 0);
+ g_return_val_if_fail (GST_IS_DPMAN (dpman), 0);
+ g_return_val_if_fail (name != NULL, 0);
+
+ dpwrap = g_hash_table_lookup(GST_DPMAN_DPARAMS(dpman), name);
+ g_return_val_if_fail (dpwrap != NULL, 0);
+
+ return G_VALUE_TYPE(dpwrap->value);
+}
+
+GstDParamSpec**
+gst_dpman_list_dparam_specs(GstDParamManager *dpman)
+{
+ GstDParamWrapper* dpwrap;
+ GSList *dpwraps;
+ GstDParamSpec** dparam_specs;
+ guint x = 0;
+
+ g_return_val_if_fail (dpman != NULL, NULL);
+ g_return_val_if_fail (GST_IS_DPMAN (dpman), NULL);
+
+ dpwraps = GST_DPMAN_DPARAMS_LIST(dpman);
+
+ dparam_specs = g_new0(GstDParamSpec*, g_slist_length(dpwraps) + 1);
+
+ while (dpwraps){
+ dpwrap = (GstDParamWrapper*)dpwraps->data;
+ dparam_specs[x++] = dpwrap->spec;
+ dpwraps = g_slist_next(dpwraps);
+ }
+ return dparam_specs;
+}
+
+GstDParamSpec*
+gst_dpman_get_dparam_spec (GstDParamManager *dpman, gchar *dparam_name)
+{
+ GstDParamWrapper* dpwrap;
+
+ g_return_val_if_fail (dpman != NULL, NULL);
+ g_return_val_if_fail (GST_IS_DPMAN (dpman), NULL);
+ g_return_val_if_fail (dparam_name != NULL, NULL);
+
+ dpwrap = gst_dpman_get_wrapper(dpman, dparam_name);
+ return dpwrap->spec;
+}
+
+void
+gst_dpman_dparam_spec_has_changed (GstDParamManager *dpman, gchar *dparam_name)
+{
+
+}
+
+/**
+ * gst_dpman_register_mode
+ * @klass: GstDParamManagerClass class instance
+ * @modename: the unique name of the new mode
+ * @preprocessfunc: the function which will be called before each buffer is processed
+ * @processfunc: the function which may be called throughout the processing of a buffer
+ * @setupfunc: the function which initialises the mode when activated
+ * @teardownfunc: the function which frees any resources the mode uses
+ *
+ */
+void
+gst_dpman_register_mode (GstDParamManagerClass *klass,
+ gchar *modename,
+ GstDPMModePreProcessFunction preprocessfunc,
+ GstDPMModeProcessFunction processfunc,
+ GstDPMModeSetupFunction setupfunc,
+ GstDPMModeTeardownFunction teardownfunc)
+{
+ GstDPMMode *mode;
+
+ g_return_if_fail (klass != NULL);
+ g_return_if_fail (modename != NULL);
+ g_return_if_fail (GST_IS_DPMAN_CLASS (klass));
+
+ mode = g_new0(GstDPMMode,1);
+
+ mode->preprocessfunc = preprocessfunc;
+ mode->processfunc = processfunc;
+ mode->setupfunc = setupfunc;
+ mode->teardownfunc = teardownfunc;
+
+ g_hash_table_insert(klass->modes, modename, mode);
+ GST_DEBUG(GST_CAT_PARAMS, "mode '%s' registered\n", modename);
+}
+
+/**
+ * gst_dpman_set_mode
+ * @dpman: GstDParamManager instance
+ * @modename: the name of the mode to use
+ *
+ * Returns: TRUE if the mode was set, FALSE otherwise
+ */
+gboolean
+gst_dpman_set_mode(GstDParamManager *dpman, gchar *modename)
+{
+ GstDPMMode *mode=NULL;
+ GstDParamManagerClass *oclass;
+
+ g_return_val_if_fail (dpman != NULL, FALSE);
+ g_return_val_if_fail (GST_IS_DPMAN (dpman), FALSE);
+ g_return_val_if_fail (modename != NULL, FALSE);
+
+ oclass = (GstDParamManagerClass*)(G_OBJECT_GET_CLASS(dpman));
+
+ mode = g_hash_table_lookup(oclass->modes, modename);
+ g_return_val_if_fail (mode != NULL, FALSE);
+ GST_DEBUG(GST_CAT_PARAMS, "setting mode to %s\n", modename);
+ if (GST_DPMAN_MODE(dpman) && GST_DPMAN_TEARDOWNFUNC(dpman)){
+ GST_DPMAN_TEARDOWNFUNC(dpman)(dpman);
+ }
+
+ GST_DPMAN_MODE(dpman) = mode;
+
+ if (GST_DPMAN_SETUPFUNC(dpman)){
+ GST_DPMAN_SETUPFUNC(dpman)(dpman);
+ }
+
+ return TRUE;
+}
+
+/**
+ * gst_dpman_set_parent
+ * @dpman: GstDParamManager instance
+ * @parent: the element that this GstDParamManager belongs to
+ *
+ */
+void
+gst_dpman_set_parent (GstDParamManager *dpman, GstElement *parent)
+{
+ g_return_if_fail (dpman != NULL);
+ g_return_if_fail (GST_IS_DPMAN (dpman));
+ g_return_if_fail (parent != NULL);
+ g_return_if_fail (GST_IS_ELEMENT (parent));
+
+ g_hash_table_insert(_element_registry, parent, dpman);
+ gst_object_set_parent (GST_OBJECT (dpman), GST_OBJECT(parent));
+ g_signal_connect(G_OBJECT(parent), "state_change",
+ G_CALLBACK (gst_dpman_state_change), dpman);
+}
+
+/**
+ * gst_dpman_get_manager
+ * @parent: the element that the desired GstDParamManager belongs to
+ *
+ * Returns: the GstDParamManager which belongs to this element or NULL
+ * if it doesn't exist
+ */
+GstDParamManager *
+gst_dpman_get_manager (GstElement *parent)
+{
+ GstDParamManager *dpman;
+ g_return_val_if_fail (parent != NULL, NULL);
+ g_return_val_if_fail (GST_IS_ELEMENT (parent), NULL);
+
+ dpman = (GstDParamManager*)g_hash_table_lookup(_element_registry, parent);
+ g_return_val_if_fail (dpman != NULL, NULL);
+ return dpman;
+}
+
+/**
+ * gst_dpman_set_rate_change_pad
+ * @dpman: GstDParamManager instance
+ * @pad: the pad which may have a "rate" caps property
+ *
+ */
+void
+gst_dpman_set_rate_change_pad(GstDParamManager *dpman, GstPad *pad)
+{
+ g_return_if_fail (dpman != NULL);
+ g_return_if_fail (GST_IS_DPMAN (dpman));
+ g_return_if_fail (pad != NULL);
+ g_return_if_fail (GST_IS_PAD (pad));
+
+ g_signal_connect(G_OBJECT(pad), "caps_changed",
+ G_CALLBACK (gst_dpman_caps_changed), dpman);
+}
+
+static GstDParamWrapper*
+gst_dpman_get_wrapper(GstDParamManager *dpman, gchar *dparam_name)
+{
+ g_return_val_if_fail (dpman != NULL, NULL);
+ g_return_val_if_fail (GST_IS_DPMAN (dpman), NULL);
+ g_return_val_if_fail (dparam_name != NULL, NULL);
+
+ return g_hash_table_lookup(GST_DPMAN_DPARAMS(dpman), dparam_name);
+}
+
+static GstDParamWrapper*
+gst_dpman_new_wrapper(GstDParamManager *dpman, gchar *dparam_name, GType type, GstDPMUpdateMethod update_method)
+{
+ GstDParamWrapper* dpwrap;
+
+ g_return_val_if_fail (dpman != NULL, NULL);
+ g_return_val_if_fail (GST_IS_DPMAN (dpman), NULL);
+ g_return_val_if_fail (dparam_name != NULL, NULL);
+
+ g_return_val_if_fail(gst_dpman_get_wrapper(dpman, dparam_name) == NULL, NULL);
+
+ dpwrap = g_new0(GstDParamWrapper,1);
+ dpwrap->update_method = update_method;
+ dpwrap->value = g_new0(GValue,1);
+ g_value_init(dpwrap->value, type);
+
+ dpwrap->spec = g_new0(GstDParamSpec,1);
+ dpwrap->spec->dparam_name = dparam_name;
+ dpwrap->spec->min_val = g_new0(GValue,1);
+ dpwrap->spec->max_val = g_new0(GValue,1);
+ dpwrap->spec->default_val = g_new0(GValue,1);
+ g_value_init(dpwrap->spec->min_val, type);
+ g_value_init(dpwrap->spec->max_val, type);
+ g_value_init(dpwrap->spec->default_val, type);
+
+ g_hash_table_insert(GST_DPMAN_DPARAMS(dpman), dparam_name, dpwrap);
+ GST_DPMAN_DPARAMS_LIST(dpman) = g_slist_append(GST_DPMAN_DPARAMS_LIST(dpman), dpwrap);
+
+ return dpwrap;
+}
+
+
+static void
+gst_dpman_state_change (GstElement *element, gint state, GstDParamManager *dpman)
+{
+ GSList *dwraps;
+ GstDParam *dparam;
+ GstDParamWrapper *dpwrap;
+
+ g_return_if_fail (dpman != NULL);
+ g_return_if_fail (GST_IS_DPMAN (dpman));
+
+ if (state == GST_STATE_PLAYING){
+ GST_DEBUG(GST_CAT_PARAMS, "initialising params\n");
+
+ // force all params to be updated
+ dwraps = GST_DPMAN_DPARAMS_LIST(dpman);
+ while (dwraps){
+ dpwrap = (GstDParamWrapper*)dwraps->data;
+ dparam = dpwrap->dparam;
+
+ if (dparam){
+ GST_DPARAM_READY_FOR_UPDATE(dparam) = TRUE;
+ if (dparam->spec){
+ g_value_copy(dparam->spec->default_val, GST_DPARAM_VALUE(dparam));
+ }
+ }
+ dwraps = g_slist_next(dwraps);
+ }
+ }
+}
+
+static void
+gst_dpman_caps_changed (GstPad *pad, GstCaps *caps, GstDParamManager *dpman)
+{
+ g_return_if_fail (caps != NULL);
+ g_return_if_fail (dpman != NULL);
+ g_return_if_fail (GST_IS_DPMAN (dpman));
+
+ GST_DPMAN_RATE(dpman) = gst_caps_get_int (caps, "rate");
+
+ GST_DEBUG(GST_CAT_PARAMS, "got caps change %d\n", GST_DPMAN_RATE(dpman));
+}
+
+static guint
+gst_dpman_preprocess_synchronous(GstDParamManager *dpman, guint frames, gint64 timestamp)
+{
+ GSList *dwraps;
+ GstDParam *dparam;
+ GstDParamWrapper *dpwrap;
+ guint x;
+
+ g_return_val_if_fail (dpman != NULL, frames);
+ g_return_val_if_fail (GST_IS_DPMAN (dpman), frames);
+
+ // now check whether any passive dparams are ready for an update
+ dwraps = GST_DPMAN_DPARAMS_LIST(dpman);
+ while (dwraps){
+ dpwrap = (GstDParamWrapper*)dwraps->data;
+ dparam = dpwrap->dparam;
+
+ if (dparam && (GST_DPARAM_READY_FOR_UPDATE(dparam) &&
+ (GST_DPARAM_NEXT_UPDATE_TIMESTAMP(dparam) <= timestamp))){
+
+ // this will make dpwrap->value contain the latest value.
+ // now we just need to get it to the element
+ GST_DPARAM_DO_UPDATE(dparam, timestamp);
+
+ switch (dpwrap->update_method) {
+
+ // direct method - set the value directly in the struct of the element
+ case GST_DPMAN_DIRECT:
+ GST_DEBUG(GST_CAT_PARAMS, "doing direct update\n");
+ switch (G_VALUE_TYPE(dpwrap->value)){
+ case G_TYPE_CHAR:
+ *(gchar*)dpwrap->update_data = g_value_get_char(dpwrap->value);
+ break;
+ case G_TYPE_UCHAR:
+ *(guchar*)dpwrap->update_data = g_value_get_uchar(dpwrap->value);
+ break;
+ case G_TYPE_BOOLEAN:
+ *(gboolean*)dpwrap->update_data = g_value_get_boolean(dpwrap->value);
+ break;
+ case G_TYPE_INT:
+ *(gint*)dpwrap->update_data = g_value_get_int(dpwrap->value);
+ break;
+ case G_TYPE_UINT:
+ *(guint*)dpwrap->update_data = g_value_get_uint(dpwrap->value);
+ break;
+ case G_TYPE_LONG:
+ *(glong*)dpwrap->update_data = g_value_get_long(dpwrap->value);
+ break;
+ case G_TYPE_ULONG:
+ *(gulong*)dpwrap->update_data = g_value_get_ulong(dpwrap->value);
+ break;
+ case G_TYPE_FLOAT:
+ *(gfloat*)dpwrap->update_data = g_value_get_float(dpwrap->value);
+ break;
+ case G_TYPE_DOUBLE:
+ *(gdouble*)dpwrap->update_data = g_value_get_double(dpwrap->value);
+ break;
+ case G_TYPE_POINTER:
+ *(gpointer*)dpwrap->update_data = g_value_get_pointer(dpwrap->value);
+ break;
+ default:
+ break;
+ }
+ break;
+
+ // callback method - call the element's callback so it can do what it likes
+ case GST_DPMAN_CALLBACK:
+ GST_DEBUG(GST_CAT_PARAMS, "doing callback update\n");
+ GST_DPMAN_DO_UPDATE(dpwrap);
+ break;
+
+ // array method - generate an array of the right size
+ // with each value being the same (in synchronous update mode)
+ case GST_DPMAN_ARRAY:
+ GST_DEBUG(GST_CAT_PARAMS, "doing array update\n");
+ switch (G_VALUE_TYPE(dpwrap->value)){
+ case G_TYPE_CHAR:
+ (gchar*)dpwrap->update_data = g_new(gchar, frames);
+ *(gchar*)dpwrap->update_data = g_value_get_char(dpwrap->value);
+ for (x = 1 ; x < frames ; x++)
+ ((gchar*)dpwrap->update_data)[x] = *(gchar*)dpwrap->update_data;
+ break;
+ case G_TYPE_UCHAR:
+ (guchar*)dpwrap->update_data = g_new(guchar, frames);
+ *(guchar*)dpwrap->update_data = g_value_get_uchar(dpwrap->value);
+ for (x = 1 ; x < frames ; x++)
+ ((guchar*)dpwrap->update_data)[x] = *(guchar*)dpwrap->update_data;
+ break;
+ case G_TYPE_BOOLEAN:
+ (gboolean*)dpwrap->update_data = g_new(gboolean, frames);
+ *(gboolean*)dpwrap->update_data = g_value_get_boolean(dpwrap->value);
+ for (x = 1 ; x < frames ; x++)
+ ((gboolean*)dpwrap->update_data)[x] = *(gboolean*)dpwrap->update_data;
+ break;
+ case G_TYPE_INT:
+ (gint*)dpwrap->update_data = g_new(gint, frames);
+ *(gint*)dpwrap->update_data = g_value_get_int(dpwrap->value);
+ for (x = 1 ; x < frames ; x++)
+ ((gint*)dpwrap->update_data)[x] = *(gint*)dpwrap->update_data;
+ break;
+ case G_TYPE_UINT:
+ (guint*)dpwrap->update_data = g_new(guint, frames);
+ *(guint*)dpwrap->update_data = g_value_get_uint(dpwrap->value);
+ for (x = 1 ; x < frames ; x++)
+ ((guint*)dpwrap->update_data)[x] = *(guint*)dpwrap->update_data;
+ break;
+ case G_TYPE_LONG:
+ (glong*)dpwrap->update_data = g_new(glong, frames);
+ *(glong*)dpwrap->update_data = g_value_get_long(dpwrap->value);
+ for (x = 1 ; x < frames ; x++)
+ ((glong*)dpwrap->update_data)[x] = *(glong*)dpwrap->update_data;
+ break;
+ case G_TYPE_ULONG:
+ (gulong*)dpwrap->update_data = g_new(gulong, frames);
+ *(gulong*)dpwrap->update_data = g_value_get_ulong(dpwrap->value);
+ for (x = 1 ; x < frames ; x++)
+ ((gulong*)dpwrap->update_data)[x] = *(gulong*)dpwrap->update_data;
+ break;
+ case G_TYPE_FLOAT:
+ (gfloat*)dpwrap->update_data = g_new(gfloat, frames);
+ *(gfloat*)dpwrap->update_data = g_value_get_float(dpwrap->value);
+ for (x = 1 ; x < frames ; x++)
+ ((gfloat*)dpwrap->update_data)[x] = *(gfloat*)dpwrap->update_data;
+ break;
+ case G_TYPE_DOUBLE:
+ (gdouble*)dpwrap->update_data = g_new(gdouble, frames);
+ *(gdouble*)dpwrap->update_data = g_value_get_double(dpwrap->value);
+ for (x = 1 ; x < frames ; x++)
+ ((gdouble*)dpwrap->update_data)[x] = *(gdouble*)dpwrap->update_data;
+ break;
+ case G_TYPE_POINTER:
+ (gpointer*)dpwrap->update_data = g_new(gpointer, frames);
+ *(gpointer*)dpwrap->update_data = g_value_get_pointer(dpwrap->value);
+ for (x = 1 ; x < frames ; x++)
+ ((gpointer*)dpwrap->update_data)[x] = *(gpointer*)dpwrap->update_data;
+ break;
+ default:
+ break;
+ }
+ break;
+ default:
+ break;
+ }
+ }
+ dwraps = g_slist_next(dwraps);
+ }
+ return frames;
+}
+
+static guint
+gst_dpman_preprocess_noop(GstDParamManager *dpman, guint frames, gint64 timestamp)
+{
+ return frames;
+}
+
+static guint
+gst_dpman_process_noop(GstDParamManager *dpman, guint frame_count)
+{
+ return 0;
+}
+
--- /dev/null
+/* GStreamer
+ * Copyright (C) 2001 Steve Baker <stevebaker_org@yahoo.co.uk>
+ *
+ * gstdparammanager.h: Dynamic Parameter group functionality
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+
+#ifndef __GST_DPMAN_H__
+#define __GST_DPMAN_H__
+
+#include <gst/gstobject.h>
+#include <gst/gstprops.h>
+#include <libs/control/gstdparam.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif /* __cplusplus */
+
+#define GST_TYPE_DPMAN (gst_dpman_get_type ())
+#define GST_DPMAN(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), GST_TYPE_DPMAN,GstDParamManager))
+#define GST_DPMAN_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), GST_TYPE_DPMAN,GstDParamManager))
+#define GST_IS_DPMAN(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GST_TYPE_DPMAN))
+#define GST_IS_DPMAN_CLASS(obj) (G_TYPE_CHECK_CLASS_TYPE ((klass), GST_TYPE_DPMAN))
+
+#define GST_DPMAN_NAME(dpman) (GST_OBJECT_NAME(dpman))
+#define GST_DPMAN_PARENT(dpman) (GST_OBJECT_PARENT(dpman))
+#define GST_DPMAN_DPARAMS(dpman) ((dpman)->dparams)
+#define GST_DPMAN_DPARAMS_LIST(dpman) ((dpman)->dparams_list)
+
+#define GST_DPMAN_MODE_NAME(dpman) ((dpman)->mode_name)
+#define GST_DPMAN_MODE(dpman) ((dpman)->mode)
+#define GST_DPMAN_MODE_DATA(dpman) ((dpman)->mode_data)
+#define GST_DPMAN_RATE(dpman) ((dpman)->rate)
+
+typedef enum {
+ GST_DPMAN_CALLBACK,
+ GST_DPMAN_DIRECT,
+ GST_DPMAN_ARRAY,
+} GstDPMUpdateMethod;
+
+typedef struct _GstDParamManager GstDParamManager;
+typedef struct _GstDParamManagerClass GstDParamManagerClass;
+typedef struct _GstDPMMode GstDPMMode;
+typedef struct _GstDParamWrapper GstDParamWrapper;
+
+typedef guint (*GstDPMModePreProcessFunction) (GstDParamManager *dpman, guint frames, gint64 timestamp);
+typedef guint (*GstDPMModeProcessFunction) (GstDParamManager *dpman, guint frame_count);
+typedef void (*GstDPMModeSetupFunction) (GstDParamManager *dpman);
+typedef void (*GstDPMModeTeardownFunction) (GstDParamManager *dpman);
+
+typedef void (*GstDPMUpdateFunction) (GValue *value, gpointer data);
+
+struct _GstDParamManager {
+ GstObject object;
+
+ GHashTable *dparams;
+ GSList *dparams_list;
+
+ gchar *mode_name;
+ GstDPMMode* mode;
+ gpointer mode_data;
+
+ gint64 timestamp;
+ guint rate;
+};
+
+struct _GstDParamManagerClass {
+ GstObjectClass parent_class;
+
+ GHashTable *modes;
+ /* signal callbacks */
+};
+
+struct _GstDPMMode {
+ GstDPMModePreProcessFunction preprocessfunc;
+ GstDPMModeProcessFunction processfunc;
+ GstDPMModeSetupFunction setupfunc;
+ GstDPMModeTeardownFunction teardownfunc;
+};
+
+struct _GstDParamWrapper {
+ GstDParamSpec* spec;
+ GValue *value;
+ GstDParam *dparam;
+ GstDPMUpdateMethod update_method;
+ gpointer update_data;
+ GstDPMUpdateFunction update_func;
+};
+
+#define GST_DPMAN_PREPROCESSFUNC(dpman) (((dpman)->mode)->preprocessfunc)
+#define GST_DPMAN_PROCESSFUNC(dpman) (((dpman)->mode)->processfunc)
+#define GST_DPMAN_SETUPFUNC(dpman) (((dpman)->mode)->setupfunc)
+#define GST_DPMAN_TEARDOWNFUNC(dpman) (((dpman)->mode)->teardownfunc)
+
+#define GST_DPMAN_PREPROCESS(dpman, buffer_size, timestamp) \
+ (GST_DPMAN_PREPROCESSFUNC(dpman)(dpman, buffer_size, timestamp))
+
+#define GST_DPMAN_PROCESS(dpman, frame_count) \
+ (GST_DPMAN_PROCESSFUNC(dpman)(dpman, frame_count))
+
+#define GST_DPMAN_PROCESS_COUNTDOWN(dpman, frame_countdown, frame_count) \
+ (frame_countdown-- || \
+ (frame_countdown = GST_DPMAN_PROCESS(dpman, frame_count)))
+
+#define GST_DPMAN_DO_UPDATE(dpwrap) ((dpwrap->update_func)(dpwrap->value, dpwrap->update_data))
+
+GType gst_dpman_get_type (void);
+GstDParamManager* gst_dpman_new (gchar *name, GstElement *parent);
+void gst_dpman_set_parent (GstDParamManager *dpman, GstElement *parent);
+GstDParamManager* gst_dpman_get_manager (GstElement *parent);
+
+gboolean gst_dpman_add_required_dparam_callback (GstDParamManager *dpman,
+ gchar *dparam_name,
+ GType type,
+ GstDPMUpdateFunction update_func,
+ gpointer update_data);
+gboolean gst_dpman_add_required_dparam_direct (GstDParamManager *dpman,
+ gchar *dparam_name,
+ GType type,
+ gpointer update_data);
+gboolean gst_dpman_add_required_dparam_array (GstDParamManager *dpman,
+ gchar *dparam_name,
+ GType type,
+ gpointer update_data);
+void gst_dpman_remove_required_dparam (GstDParamManager *dpman, gchar *dparam_name);
+gboolean gst_dpman_attach_dparam (GstDParamManager *dpman, gchar *dparam_name, GstDParam *dparam);
+void gst_dpman_dettach_dparam (GstDParamManager *dpman, gchar *dparam_name);
+GstDParam* gst_dpman_get_dparam(GstDParamManager *dpman, gchar *name);
+GType gst_dpman_get_dparam_type (GstDParamManager *dpman, gchar *name);
+
+GstDParamSpec** gst_dpman_list_dparam_specs(GstDParamManager *dpman);
+GstDParamSpec* gst_dpman_get_dparam_spec (GstDParamManager *dpman, gchar *dparam_name);
+void gst_dpman_dparam_spec_has_changed (GstDParamManager *dpman, gchar *dparam_name);
+
+void gst_dpman_set_rate_change_pad(GstDParamManager *dpman, GstPad *pad);
+
+gboolean gst_dpman_set_mode(GstDParamManager *dpman, gchar *modename);
+void gst_dpman_register_mode (GstDParamManagerClass *klass,
+ gchar *modename,
+ GstDPMModePreProcessFunction preprocessfunc,
+ GstDPMModeProcessFunction processfunc,
+ GstDPMModeSetupFunction setupfunc,
+ GstDPMModeTeardownFunction teardownfunc);
+
+#ifdef __cplusplus
+}
+#endif /* __cplusplus */
+
+#endif /* __GST_DPMAN_H__ */
projects / platform / upstream / gstreamer.git / commitdiff