gstreamer/gst/gstutils.c
Wim Taymans 97a18197ea Fixed the utils for getting properties again.
Original commit message from CVS:
Fixed the utils for getting properties again.
Added come const directives to the arguments again.
Check for non exiting properties.
2001-06-17 15:03:10 +00:00

311 lines
7.3 KiB
C

/* GStreamer
* Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
* 2000 Wim Taymans <wtay@chello.be>
*
* gstutils.c: Utility functions: gtk_get_property stuff, etc.
*
* 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 <stdio.h>
#include <string.h>
#include "gst_private.h"
#include "gstutils.h"
#include "gstextratypes.h"
/**
* gst_util_get_int_arg:
* @object: the object to query
* @argname: the name of the argument
*
* Retrieves a property of an object as an integer.
*
* Returns: the property of the object
*/
gint
gst_util_get_int_arg (GObject *object, const gchar *argname)
{
GValue value = {0, };
g_value_init (&value, G_TYPE_INT);
g_object_get_property(G_OBJECT(object),argname,&value);
return g_value_get_int(&value);
}
/**
* gst_util_get_bool_arg:
* @object: the object to query
* @argname: the name of the argument
*
* Retrieves a property of an object as a boolean.
*
* Returns: the property of the object
*/
gint
gst_util_get_bool_arg (GObject *object, const gchar *argname)
{
GValue value = {0, };
g_value_init (&value, G_TYPE_BOOLEAN);
g_object_get_property(G_OBJECT(object),argname,&value);
return g_value_get_boolean(&value);
}
/**
* gst_util_get_long_arg:
* @object: the object to query
* @argname: the name of the argument
*
* Retrieves a property of an object as a long.
*
* Returns: the property of the object
*/
glong
gst_util_get_long_arg (GObject *object, const gchar *argname)
{
GValue value = {0, };
g_value_init (&value, G_TYPE_LONG);
g_object_get_property(G_OBJECT(object),argname,&value);
return g_value_get_long(&value);
}
/**
* gst_util_get_float_arg:
* @object: the object to query
* @argname: the name of the argument
*
* Retrieves a property of an object as a float.
*
* Returns: the property of the object
*/
gfloat
gst_util_get_float_arg (GObject *object, const gchar *argname)
{
GValue value = {0, };
g_value_init (&value, G_TYPE_FLOAT);
g_object_get_property(G_OBJECT(object),argname,&value);
return g_value_get_float(&value);
}
/**
* gst_util_get_double_arg:
* @object: the object to query
* @argname: the name of the argument
*
* Retrieves a property of an object as a double.
*
* Returns: the property of the object
*/
gdouble
gst_util_get_double_arg (GObject *object, const gchar *argname)
{
GValue value = {0, };
g_value_init (&value, G_TYPE_DOUBLE);
g_object_get_property(G_OBJECT(object),argname,&value);
return g_value_get_double(&value);
}
/**
* gst_util_get_string_arg:
* @object: the object to query
* @argname: the name of the argument
*
* Retrieves a property of an object as a string.
*
* Returns: the property of the object
*/
const gchar*
gst_util_get_string_arg (GObject *object, const gchar *argname)
{
GValue value = {0, };
g_value_init (&value, G_TYPE_STRING);
g_object_get_property(G_OBJECT(object),argname,&value);
return g_value_get_string(&value);
}
/**
* gst_util_get_pointer_arg:
* @object: the object to query
* @argname: the name of the argument
*
* Retrieves a property of an object as a pointer.
*
* Returns: the property of the object
*/
gpointer
gst_util_get_pointer_arg (GObject *object, const gchar *argname)
{
GValue value = {0, };
g_value_init (&value, G_TYPE_POINTER);
g_object_get_property(G_OBJECT(object),argname,&value);
return g_value_get_pointer(&value);
}
/**
* gst_util_get_widget_property:
* @object: the object to query
* @argname: the name of the argument
*
* Retrieves a property of an object as a widget.
*
* Returns: the property of the object
*/
/* COMMENTED OUT BECAUSE WE HAVE NO MORE gtk.h
GtkWidget*
gst_util_get_widget_property (GObject *object, const gchar *argname)
{
GtkArg arg;
arg.name = argname;
gtk_object_getv(G_OBJECT(object),1,&arg);
return GTK_WIDGET(G_VALUE_OBJECT(arg));
}
*/
/**
* gst_util_dump_mem:
* @mem: a pointer to the memory to dump
* @size: the size of the memory block to dump
*
* Dumps the memory block into a hex representation. Useful for debugging.
*/
void
gst_util_dump_mem (guchar *mem, guint size)
{
guint i, j;
i = j =0;
while (i<size) {
if (j == 0) {
g_print("\n%08x : ", i);
j = 15;
}
else {
j--;
}
g_print("%02x ", mem[i]);
i++;
}
g_print("\n");
}
/**
* gst_util_set_object_arg:
* @object: the object to set the argument of
* @name: the name of the argument to set
* @value: the string value to set
*
* Convertes the string value to the type of the objects argument and
* sets the argument with it.
*/
void
gst_util_set_object_arg (GObject *object, const gchar *name, const gchar *value)
{
if (name && value) {
GParamSpec *paramspec;
paramspec = g_object_class_find_property(G_OBJECT_GET_CLASS(object),name);
if (!paramspec) {
return;
}
GST_DEBUG(0,"paramspec->flags is %d, paramspec->value_type is %d\n",
paramspec->flags,paramspec->value_type);
if (paramspec->flags & G_PARAM_WRITABLE) {
switch (paramspec->value_type) {
case G_TYPE_STRING:
g_object_set (G_OBJECT (object), name, value, NULL);
break;
case G_TYPE_ENUM:
case G_TYPE_INT: {
gint i;
sscanf (value, "%d", &i);
g_object_set (G_OBJECT (object), name, i, NULL);
break;
}
case G_TYPE_LONG: {
glong i;
sscanf (value, "%ld", &i);
g_object_set (G_OBJECT (object), name, i, NULL);
break;
}
case G_TYPE_ULONG: {
gulong i;
sscanf (value, "%lu", &i);
g_object_set (G_OBJECT (object), name, i, NULL);
break;
}
case G_TYPE_BOOLEAN: {
gboolean i = FALSE;
if (!strncmp ("true", value, 4)) i = TRUE;
g_object_set (G_OBJECT (object), name, i, NULL);
break;
}
case G_TYPE_CHAR: {
gchar i;
sscanf (value, "%c", &i);
g_object_set (G_OBJECT (object), name, i, NULL);
break;
}
case G_TYPE_UCHAR: {
guchar i;
sscanf (value, "%c", &i);
g_object_set (G_OBJECT (object), name, i, NULL);
break;
}
case G_TYPE_FLOAT: {
gfloat i;
sscanf (value, "%f", &i);
g_object_set (G_OBJECT (object), name, i, NULL);
break;
}
case G_TYPE_DOUBLE: {
gfloat i;
sscanf (value, "%g", &i);
g_object_set (G_OBJECT (object), name, (gdouble)i, NULL);
break;
}
default:
if (G_IS_PARAM_SPEC_ENUM(paramspec)) {
gint i;
sscanf (value, "%d", &i);
g_object_set (G_OBJECT (object), name, i, NULL);
}
else if (paramspec->value_type == GST_TYPE_FILENAME) {
g_object_set (G_OBJECT (object), name, value, NULL);
}
break;
}
}
}
}