*
* 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.
+ * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
+ * Boston, MA 02110-1301, USA.
*/
/**
* SECTION:gstparse
+ * @title: 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
- * gst-launch utility.
+ * gst-launch-1.0 utility (see man-page for syntax documentation).
+ *
+ * Please note that these functions take several measures to create
+ * somewhat dynamic pipelines. Due to that such pipelines are not always
+ * reusable (set the state to NULL and back to PLAYING).
*/
-
#include "gst_private.h"
#include <string.h>
#include "parse/types.h"
#endif
+G_DEFINE_BOXED_TYPE (GstParseContext, gst_parse_context,
+ (GBoxedCopyFunc) gst_parse_context_copy,
+ (GBoxedFreeFunc) gst_parse_context_free);
+
/**
* gst_parse_error_quark:
*
* Allocates a parse context for use with gst_parse_launch_full() or
* gst_parse_launchv_full().
*
- * Returns: a newly-allocated parse context. Free with gst_parse_context_free()
- * when no longer needed.
+ * Free-function: gst_parse_context_free
*
- * Since: 0.10.20
+ * Returns: (transfer full) (nullable): a newly-allocated parse context. Free
+ * with gst_parse_context_free() when no longer needed.
*/
GstParseContext *
gst_parse_context_new (void)
}
/**
- * gst_parse_context_free:
+ * gst_parse_context_copy:
* @context: a #GstParseContext
*
- * Frees a parse context previously allocated with gst_parse_context_new().
+ * Copies the @context.
*
- * Since: 0.10.20
+ * Returns: (transfer full) (nullable): A copied #GstParseContext
+ */
+GstParseContext *
+gst_parse_context_copy (const GstParseContext * context)
+{
+ GstParseContext *ret = NULL;
+#ifndef GST_DISABLE_PARSE
+
+ ret = gst_parse_context_new ();
+ if (context) {
+ GQueue missing_copy = G_QUEUE_INIT;
+ GList *l;
+
+ for (l = context->missing_elements; l != NULL; l = l->next)
+ g_queue_push_tail (&missing_copy, g_strdup ((const gchar *) l->data));
+
+ ret->missing_elements = missing_copy.head;
+ }
+#endif
+ return ret;
+}
+
+/**
+ * gst_parse_context_free:
+ * @context: (transfer full): a #GstParseContext
+ *
+ * Frees a parse context previously allocated with gst_parse_context_new().
*/
void
gst_parse_context_free (GstParseContext * context)
* or gst_parse_launchv_full(). Will only return results if an error code
* of %GST_PARSE_ERROR_NO_SUCH_ELEMENT was returned.
*
- * Returns: a NULL-terminated array of element factory name strings of
- * missing elements. Free with g_strfreev() when no longer needed.
- *
- * Since: 0.10.20
+ * Returns: (transfer full) (array zero-terminated=1) (element-type gchar*) (nullable): a
+ * %NULL-terminated array of element factory name strings of missing
+ * elements. Free with g_strfreev() when no longer needed.
*/
gchar **
gst_parse_context_get_missing_elements (GstParseContext * context)
_gst_parse_escape (const gchar * str)
{
GString *gstr = NULL;
+ gboolean in_quotes;
g_return_val_if_fail (str != NULL, NULL);
gstr = g_string_sized_new (strlen (str));
+ in_quotes = FALSE;
+
while (*str) {
- if (*str == ' ')
+ if (*str == '"' && (!in_quotes || *(str - 1) != '\\'))
+ in_quotes = !in_quotes;
+
+ if (*str == ' ' && !in_quotes)
g_string_append_c (gstr, '\\');
+
g_string_append_c (gstr, *str);
str++;
}
/**
* gst_parse_launchv:
- * @argv: null-terminated array of arguments
+ * @argv: (in) (array zero-terminated=1): 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.
+ * @error will contain an error message if an erroneous 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.
+ * Returns: (transfer floating) (nullable): a new element on success and %NULL
+ * on failure.
*/
GstElement *
gst_parse_launchv (const gchar ** argv, GError ** error)
{
- return gst_parse_launchv_full (argv, NULL, 0, error);
+ return gst_parse_launchv_full (argv, NULL, GST_PARSE_FLAG_NONE, error);
}
/**
* gst_parse_launchv_full:
- * @argv: null-terminated array of arguments
- * @context: a parse context allocated with gst_parse_context_new(), or %NULL
+ * @argv: (in) (array zero-terminated=1): null-terminated array of arguments
+ * @context: (allow-none): a parse context allocated with
+ * gst_parse_context_new(), or %NULL
* @flags: parsing options, or #GST_PARSE_FLAG_NONE
* @error: pointer to a #GError (which must be initialised to %NULL)
*
* @error will contain an error message if an erroneous pipeline is specified.
* An error does not mean that the pipeline could not be constructed.
*
- * Returns: a new element on success; on failure, either %NULL or a
- * partially-constructed bin or element will be returned and @error will be set
- * (unless you passed #GST_PARSE_FLAG_FATAL_ERRORS in @flags, then %NULL will
- * always be returned on failure)
- *
- * Since: 0.10.20
+ * Returns: (transfer floating) (nullable): a new element on success; on
+ * failure, either %NULL or a partially-constructed bin or element will be
+ * returned and @error will be set (unless you passed
+ * #GST_PARSE_FLAG_FATAL_ERRORS in @flags, then %NULL will always be returned
+ * on failure)
*/
GstElement *
gst_parse_launchv_full (const gchar ** argv, GstParseContext * context,
argvp = argv;
while (*argvp) {
arg = *argvp;
+ GST_DEBUG ("escaping argument %s", arg);
tmp = _gst_parse_escape (arg);
g_string_append (str, tmp);
g_free (tmp);
* 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.
+ * Returns: (transfer floating) (nullable): 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.
*/
GstElement *
gst_parse_launch (const gchar * pipeline_description, GError ** error)
{
- return gst_parse_launch_full (pipeline_description, NULL, 0, error);
+ return gst_parse_launch_full (pipeline_description, NULL, GST_PARSE_FLAG_NONE,
+ error);
}
/**
* gst_parse_launch_full:
* @pipeline_description: the command line describing the pipeline
- * @context: a parse context allocated with gst_parse_context_new(), or %NULL
+ * @context: (allow-none): a parse context allocated with
+ * gst_parse_context_new(), or %NULL
* @flags: parsing options, or #GST_PARSE_FLAG_NONE
* @error: the error message in case of an erroneous pipeline.
*
* 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 then is returned.
- *
- * Since: 0.10.20
+ * Returns: (transfer floating) (nullable): 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
+ * then is returned (unless the GST_PARSE_FLAG_PLACE_IN_BIN flag is set, in
+ * which case they are put in a #GstBin instead).
*/
GstElement *
gst_parse_launch_full (const gchar * pipeline_description,
{
#ifndef GST_DISABLE_PARSE
GstElement *element;
+ GError *myerror = NULL;
g_return_val_if_fail (pipeline_description != NULL, NULL);
g_return_val_if_fail (error == NULL || *error == NULL, NULL);
GST_CAT_INFO (GST_CAT_PIPELINE, "parsing pipeline description '%s'",
pipeline_description);
- element = _gst_parse_launch (pipeline_description, error, context, flags);
+ element = priv_gst_parse_launch (pipeline_description, &myerror, context,
+ flags);
/* don't return partially constructed pipeline if FATAL_ERRORS was given */
- if (G_UNLIKELY (error != NULL && *error != NULL && element != NULL)) {
+ if (G_UNLIKELY (myerror != NULL && element != NULL)) {
if ((flags & GST_PARSE_FLAG_FATAL_ERRORS)) {
gst_object_unref (element);
element = NULL;
}
}
+ if (myerror)
+ g_propagate_error (error, myerror);
+
return element;
#else
gchar *msg;
projects / platform / upstream / gstreamer.git / blobdiff