2 * Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
3 * 2000 Wim Taymans <wtay@chello.be>
4 * 2002 Andy Wingo <wingo@pobox.com>
6 * gstparse.c: get a pipeline from a text pipeline description
8 * This library is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Library General Public
10 * License as published by the Free Software Foundation; either
11 * version 2 of the License, or (at your option) any later version.
13 * This library is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * Library General Public License for more details.
18 * You should have received a copy of the GNU Library General Public
19 * License along with this library; if not, write to the
20 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
21 * Boston, MA 02111-1307, USA.
30 extern GstElement *_gst_parse_launch (const gchar *, GError **);
33 gst_parse_error_quark (void)
35 static GQuark quark = 0;
37 quark = g_quark_from_static_string ("gst_parse_error");
41 static gchar *_gst_parse_escape (const gchar *str)
45 g_return_val_if_fail (str != NULL, NULL);
47 gstr = g_string_sized_new (strlen (str));
51 g_string_append_c (gstr, '\\');
52 g_string_append_c (gstr, *str);
60 * @argv: null-terminated array of arguments
61 * @error: pointer to a #GError
63 * Create a new element based on command line syntax.
64 * #error will contain an error message if pipeline creation fails and can
65 * contain an error message, when a recoverable error happened.
67 * Returns: a new element on success and NULL on failure.
70 gst_parse_launchv (const gchar **argv, GError **error)
74 const gchar **argvp, *arg;
77 g_return_val_if_fail (argv != NULL, NULL);
79 /* let's give it a nice size. */
80 str = g_string_sized_new (1024);
85 tmp = _gst_parse_escape (arg);
86 g_string_append (str, tmp);
88 g_string_append (str, " ");
92 element = gst_parse_launch (str->str, error);
94 g_string_free (str, TRUE);
101 * @pipeline_description: the command line describing the pipeline
102 * @error: the error message in case of a failure
104 * Create a new pipeline based on command line syntax.
106 * Returns: a new bin on success, NULL on failure. By default the bin is
107 * a GstPipeline, but it depends on the pipeline_description.
110 gst_parse_launch (const gchar * pipeline_description, GError **error)
113 static GStaticMutex flex_lock = G_STATIC_MUTEX_INIT;
115 g_return_val_if_fail (pipeline_description != NULL, NULL);
117 GST_INFO (GST_CAT_PIPELINE, "parsing pipeline description %s",
118 pipeline_description);
120 /* the need for the mutex will go away with flex 2.5.6 */
121 g_static_mutex_lock (&flex_lock);
122 element = _gst_parse_launch (pipeline_description, error);
123 g_static_mutex_unlock (&flex_lock);