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 <ctype.h>
#include "gst_private.h"
#include "gstutils.h"
#include "gstextratypes.h"
#define ZERO(mem) memset(&mem, 0, sizeof(mem))
/**
* 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;
ZERO (value);
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;
ZERO (value);
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;
ZERO (value);
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_int64_arg:
* @object: the object to query
* @argname: the name of the argument
*
* Retrieves a property of an object as an int64.
*
* Returns: the property of the object
*/
gint64
gst_util_get_int64_arg (GObject *object, const gchar *argname)
{
GValue value;
ZERO (value);
g_value_init (&value, G_TYPE_INT64);
g_object_get_property (G_OBJECT (object), argname, &value);
return g_value_get_int64 (&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;
ZERO (value);
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;
ZERO (value);
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;
ZERO (value);
g_value_init (&value, G_TYPE_STRING);
g_object_get_property (G_OBJECT (object), argname, &value);
return g_value_get_string (&value); /* memleak? */
}
/**
* 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;
ZERO (value);
g_value_init (&value, G_TYPE_POINTER);
g_object_get_property (G_OBJECT (object), argname, &value);
return g_value_get_pointer (&value);
}
/**
* 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) {
if (i != 0) {
guint k;
for (k = i - 16; k < i; k++) {
if (isprint (mem[k]))
g_print ("%c", mem[k]);
else
g_print (".");
}
g_print ("\n");
}
g_print ("%08x : ", i);
j = 15;
}
else {
j--;
}
g_print ("%02x ", mem[i]);
i++;
}
g_print ("\n");
}
/**
* 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_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 (0, "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 (!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;
}
}
}
}
/* -----------------------------------------------------
*
* The following code will be moved out of the main
* gstreamer library someday.
*/
#include "gstpad.h"
#include "gsttype.h"
#include "gstprops.h"
static void
string_append_indent (GString * str, gint count)
{
gint xx;
for (xx = 0; xx < count; xx++)
g_string_append_c (str, ' ');
}
static void
gst_print_props (GString *buf, gint indent, GList *props, gboolean showname)
{
GList *elem;
guint width = 0;
GstPropsType type;
if (showname)
for (elem = props; elem; elem = g_list_next (elem)) {
GstPropsEntry *prop = elem->data;
const gchar *name = gst_props_entry_get_name (prop);
if (width < strlen (name))
width = strlen (name);
}
for (elem = props; elem; elem = g_list_next (elem)) {
GstPropsEntry *prop = elem->data;
string_append_indent (buf, indent);
if (showname) {
const gchar *name = gst_props_entry_get_name (prop);
g_string_append (buf, name);
string_append_indent (buf, 2 + width - strlen (name));
}
type = gst_props_entry_get_type (prop);
switch (type) {
case GST_PROPS_INT_TYPE:
{
gint val;
gst_props_entry_get_int (prop, &val);
g_string_append_printf (buf, "%d (int)\n", val);
break;
}
case GST_PROPS_INT_RANGE_TYPE:
{
gint min, max;
gst_props_entry_get_int_range (prop, &min, &max);
g_string_append_printf (buf, "%d - %d (int)\n", min, max);
break;
}
case GST_PROPS_FLOAT_TYPE:
{
gfloat val;
gst_props_entry_get_float (prop, &val);
g_string_append_printf (buf, "%f (float)\n", val);
break;
}
case GST_PROPS_FLOAT_RANGE_TYPE:
{
gfloat min, max;
gst_props_entry_get_float_range (prop, &min, &max);
g_string_append_printf (buf, "%f - %f (float)\n", min, max);
break;
}
case GST_PROPS_BOOL_TYPE:
{
gboolean val;
gst_props_entry_get_boolean (prop, &val);
g_string_append_printf (buf, "%s\n", val ? "TRUE" : "FALSE");
break;
}
case GST_PROPS_STRING_TYPE:
{
const gchar *val;
gst_props_entry_get_string (prop, &val);
g_string_append_printf (buf, "\"%s\"\n", val);
break;
}
case GST_PROPS_FOURCC_TYPE:
{
guint32 val;
gst_props_entry_get_fourcc_int (prop, &val);
g_string_append_printf (buf, "'%c%c%c%c' (fourcc)\n",
(gchar)( val & 0xff),
(gchar)((val >> 8) & 0xff),
(gchar)((val >> 16) & 0xff),
(gchar)((val >> 24) & 0xff));
break;
}
case GST_PROPS_LIST_TYPE:
{
const GList *list;
gst_props_entry_get_list (prop, &list);
gst_print_props (buf, indent + 2, (GList *)list, FALSE);
break;
}
default:
g_string_append_printf (buf, "unknown proptype %d\n", type);
break;
}
}
}
/**
* 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 {
gint capx = 0;
while (caps) {
GstType *type;
string_append_indent (buf, indent);
g_string_append_printf (buf, "Cap[%d]: %s\n", capx++, caps->name);
type = gst_type_find_by_id (caps->id);
string_append_indent (buf, indent + 2);
g_string_append_printf (buf, "MIME type: %s\n", type->mime ? type->mime : "unknown/unknown");
if (caps->properties)
gst_print_props (buf, indent + 4, caps->properties->properties, TRUE);
caps = caps->next;
}
}
}
/**
* 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 = 0;
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);
}
/**
* gst_util_has_arg:
* @object: an object
* @argname: a property it might have
* @arg_type: the type of the argument it should have
*
* Determines whether this @object has a property of name
* @argname and of type @arg_type
*
* Return value: TRUE if it has the prop, else FALSE
**/
gboolean
gst_util_has_arg (GObject *object, const gchar *argname, GType arg_type)
{
GParamSpec *pspec;
pspec = g_object_class_find_property (
G_OBJECT_GET_CLASS (object), argname);
if (!pspec)
return FALSE;
if (pspec->value_type != arg_type)
return FALSE;
return TRUE;
}