/* GStreamer

 * Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>

 *                    2000 Wim Taymans <wtay@chello.be>

 *                    2002 Andy Wingo <wingo@pobox.com>

 *

 * gstparse.c: get a pipeline from a text pipeline description

 *

 * 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.

 */

/**

 * SECTION:gstparse

 * @short_description: Get a pipeline from a text pipeline description

 *

 * These function allow to create a pipeline based on the syntax used in the

 */

#include "gst_private.h"

#include <string.h>

#include "gstparse.h"

#include "gsterror.h"

#include "gstinfo.h"

/**

 * gst_parse_error_quark:

 *

 * Get the error quark used by the parsing subsystem.

 *

 * Returns: the quark of the parse errors.

 */

#ifdef __SYMBIAN32__

EXPORT_C

#endif

GQuark

gst_parse_error_quark (void)

{

  static GQuark quark = 0;

  if (!quark)

    quark = g_quark_from_static_string ("gst_parse_error");

  return quark;

}

#ifndef GST_DISABLE_PARSE

static gchar *

_gst_parse_escape (const gchar * str)

{

  GString *gstr = NULL;

  g_return_val_if_fail (str != NULL, NULL);

  gstr = g_string_sized_new (strlen (str));

  while (*str) {

    if (*str == ' ')

      g_string_append_c (gstr, '\\');

    g_string_append_c (gstr, *str);

    str++;

  }

}

#endif /* !GST_DISABLE_PARSE */

/**

 * gst_parse_launchv:

 * @argv: null-terminated array of arguments

 * @error: pointer to a #GError

 *

 * Create a new element based on command line syntax.

 * @error will contain an error message if an erroneuos pipeline is specified.

 * An error does not mean that the pipeline could not be constructed.

 *

 * Returns: a new element on success and %NULL on failure.

 */

#ifdef __SYMBIAN32__

EXPORT_C

#endif

GstElement *

gst_parse_launchv (const gchar ** argv, GError ** error)

{

#ifndef GST_DISABLE_PARSE

  GstElement *element;

  GString *str;

  const gchar **argvp, *arg;

  gchar *tmp;

  g_return_val_if_fail (argv != NULL, NULL);

  /* let's give it a nice size. */

  str = g_string_sized_new (1024);

  argvp = argv;

  while (*argvp) {

    arg = *argvp;

    tmp = _gst_parse_escape (arg);

    g_string_append (str, tmp);

    g_free (tmp);

    g_string_append_c (str, ' ');

    argvp++;

  }

  g_string_free (str, TRUE);

  return element;

#else

#endif

}

/**

 * gst_parse_launch:

 * @pipeline_description: the command line describing the pipeline

 * @error: the error message in case of an erroneous pipeline.

 *

 * Create a new pipeline based on command line syntax.

 * Please note that you might get a return value that is not %NULL even though

 * the @error is set. In this case there was a recoverable parsing error and you

 * can try to play the pipeline.

 *

 * Returns: a new element on success, %NULL on failure. If more than one toplevel

 * element is specified by the @pipeline_description, all elements are put into

 * a #GstPipeline, which than is returned.

 */

#ifdef __SYMBIAN32__

EXPORT_C

#endif

GstElement *

gst_parse_launch (const gchar * pipeline_description, GError ** error)

{

#ifndef GST_DISABLE_PARSE

  GstElement *element;

  g_return_val_if_fail (pipeline_description != NULL, NULL);

      pipeline_description);

  return element;

#else

  gchar *msg;

  msg = gst_error_get_message (GST_CORE_ERROR, GST_CORE_ERROR_DISABLED);

  g_set_error (error, GST_CORE_ERROR, GST_CORE_ERROR_DISABLED, "%s", msg);

  g_free (msg);

  return NULL;

#endif

}