gstreamer/gst/gstutils.c

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/* 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 "gsturitype.h"
#include "gstinfo.h"
/**
* 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 (const guchar * mem, guint size)
{
guint i, j;
GString *string = g_string_sized_new (50);
GString *chars = g_string_sized_new (18);
i = j = 0;
while (i < size) {
if (g_ascii_isprint (mem[i]))
g_string_append_printf (chars, "%c", mem[i]);
else
g_string_append_printf (chars, ".");
g_string_append_printf (string, "%02x ", mem[i]);
j++;
i++;
if (j == 16 || i == size) {
g_print ("%08x (%p): %-48.48s %-16.16s\n", i - j, mem + i - j,
string->str, chars->str);
g_string_set_size (string, 0);
g_string_set_size (chars, 0);
j = 0;
}
}
g_string_free (string, TRUE);
g_string_free (chars, TRUE);
}
/**
* gst_util_set_value_from_string:
* @value: the value to set
* @value_str: the string to get the value from
*
* Converts the string to the type of the value and
* sets the value with it.
*/
void
gst_util_set_value_from_string (GValue * value, const gchar * value_str)
{
g_return_if_fail (value != NULL);
g_return_if_fail (value_str != NULL);
GST_CAT_DEBUG (GST_CAT_PARAMS, "parsing '%s' to type %s", 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;
}
}
/**
* 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 ("paramspec->flags is %d, paramspec->value_type is %d",
paramspec->flags, (gint) 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_UINT:{
guint i;
sscanf (value, "%u", &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 (!g_ascii_strncasecmp ("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_URI) {
g_object_set (G_OBJECT (object), name, value, NULL);
}
break;
}
}
}
}
/* -----------------------------------------------------
*
* The following code will be moved out of the main
* GStreamer library someday.
*/
#include "gstpad.h"
static void
string_append_indent (GString * str, gint count)
{
gint xx;
for (xx = 0; xx < count; xx++)
g_string_append_c (str, ' ');
}
/**
* gst_print_pad_caps:
* @buf: the buffer to print the caps in
* @indent: initial indentation
* @pad: the pad to print the caps from
*
* Write the pad capabilities in a human readable format into
* the given GString.
*/
void
gst_print_pad_caps (GString * buf, gint indent, GstPad * pad)
{
GstRealPad *realpad;
GstCaps *caps;
realpad = GST_PAD_REALIZE (pad);
caps = realpad->caps;
if (!caps) {
string_append_indent (buf, indent);
g_string_printf (buf, "%s:%s has no capabilities",
GST_DEBUG_PAD_NAME (pad));
} else {
char *s;
s = gst_caps_to_string (caps);
g_string_append (buf, s);
g_free (s);
}
}
/**
* gst_print_element_args:
* @buf: the buffer to print the args in
* @indent: initial indentation
* @element: the element to print the args of
*
* Print the element argument in a human readable format in the given
* GString.
*/
void
gst_print_element_args (GString * buf, gint indent, GstElement * element)
{
guint width;
GValue value = { 0, }; /* the important thing is that value.type = 0 */
gchar *str = NULL;
GParamSpec *spec, **specs, **walk;
specs = g_object_class_list_properties (G_OBJECT_GET_CLASS (element), NULL);
width = 0;
for (walk = specs; *walk; walk++) {
spec = *walk;
if (width < strlen (spec->name))
width = strlen (spec->name);
}
for (walk = specs; *walk; walk++) {
spec = *walk;
if (spec->flags & G_PARAM_READABLE) {
g_value_init (&value, G_PARAM_SPEC_VALUE_TYPE (spec));
g_object_get_property (G_OBJECT (element), spec->name, &value);
str = g_strdup_value_contents (&value);
g_value_unset (&value);
} else {
str = g_strdup ("Parameter not readable.");
}
string_append_indent (buf, indent);
g_string_append (buf, spec->name);
string_append_indent (buf, 2 + width - strlen (spec->name));
g_string_append (buf, str);
g_string_append_c (buf, '\n');
g_free (str);
}
g_free (specs);
}