2 #include <glib-object.h>
8 #include "../gst_private.h"
9 #include "../gst-i18n-lib.h"
11 #include "../gstconfig.h"
12 #include "../gstparse.h"
13 #include "../gstinfo.h"
14 #include "../gsterror.h"
15 #include "../gststructure.h"
16 #include "../gsturi.h"
17 #include "../gstutils.h"
18 #include "../gstvalue.h"
19 #include "../gstchildproxy.h"
22 /* All error messages in this file are user-visible and need to be translated.
23 * Don't start the message with a capital, and don't end them with a period,
24 * as they will be presented inside a sentence/error.
27 #define YYERROR_VERBOSE 1
28 #define YYLEX_PARAM scanner
30 typedef void* yyscan_t;
32 int _gst_parse_yylex (void * yylval_param , yyscan_t yyscanner);
33 int _gst_parse_yylex_init (yyscan_t scanner);
34 int _gst_parse_yylex_destroy (yyscan_t scanner);
35 struct yy_buffer_state * _gst_parse_yy_scan_string (char* , yyscan_t);
36 void _gst_parse_yypush_buffer_state (void * new_buffer ,yyscan_t yyscanner );
37 void _gst_parse_yypop_buffer_state (yyscan_t yyscanner );
40 #ifdef __GST_PARSE_TRACE
41 static guint __strings;
43 static guint __chains;
45 __gst_parse_strdup (gchar *org)
50 /* g_print ("ALLOCATED STR (%3u): %p %s\n", __strings, ret, ret); */
54 __gst_parse_strfree (gchar *str)
57 /* g_print ("FREEING STR (%3u): %p %s\n", __strings - 1, str, str); */
59 g_return_if_fail (__strings > 0);
63 link_t *__gst_parse_link_new ()
67 ret = g_new0 (link_t, 1);
68 /* g_print ("ALLOCATED LINK (%3u): %p\n", __links, ret); */
72 __gst_parse_link_free (link_t *data)
75 /* g_print ("FREEING LINK (%3u): %p\n", __links - 1, data); */
77 g_return_if_fail (__links > 0);
82 __gst_parse_chain_new ()
86 ret = g_new0 (chain_t, 1);
87 /* g_print ("ALLOCATED CHAIN (%3u): %p\n", __chains, ret); */
91 __gst_parse_chain_free (chain_t *data)
93 /* g_print ("FREEING CHAIN (%3u): %p\n", __chains - 1, data); */
95 g_return_if_fail (__chains > 0);
99 #endif /* __GST_PARSE_TRACE */
107 /* FIXME: need to connect to "disposed" signal to clean up,
108 * but there is no such signal */
118 /*** define SET_ERROR and ERROR macros/functions */
120 #ifdef G_HAVE_ISO_VARARGS
122 # define SET_ERROR(error, type, ...) \
124 GST_CAT_ERROR (GST_CAT_PIPELINE, __VA_ARGS__); \
125 if ((error) && !*(error)) { \
126 g_set_error ((error), GST_PARSE_ERROR, (type), __VA_ARGS__); \
130 # define ERROR(type, ...) \
131 SET_ERROR (graph->error, (type), __VA_ARGS__ )
133 #elif defined(G_HAVE_GNUC_VARARGS)
135 # define SET_ERROR(error, type, args...) \
137 GST_CAT_ERROR (GST_CAT_PIPELINE, args ); \
138 if ((error) && !*(error)) { \
139 g_set_error ((error), GST_PARSE_ERROR, (type), args ); \
143 # define ERROR(type, args...) \
144 SET_ERROR (graph->error,(type) , args )
149 SET_ERROR (GError **error, gint type, const char *format, ...)
153 g_warning ("error while parsing");
158 va_start (varargs, format);
159 string = g_strdup_vprintf (format, varargs);
162 g_set_error (error, GST_PARSE_ERROR, type, string);
169 #endif /* G_HAVE_ISO_VARARGS */
171 /*** define YYPRINTF macro/function if we're debugging */
173 /* bison 1.35 calls this macro with side effects, we need to make sure the
174 side effects work - crappy bison */
176 #ifndef GST_DISABLE_GST_DEBUG
179 # ifdef G_HAVE_ISO_VARARGS
181 /* # define YYFPRINTF(a, ...) GST_CAT_DEBUG (GST_CAT_PIPELINE, __VA_ARGS__) */
182 # define YYFPRINTF(a, ...) \
184 gchar *temp = g_strdup_printf (__VA_ARGS__); \
185 GST_CAT_LOG (GST_CAT_PIPELINE, temp); \
189 # elif defined(G_HAVE_GNUC_VARARGS)
191 # define YYFPRINTF(a, args...) \
193 gchar *temp = g_strdup_printf ( args ); \
194 GST_CAT_LOG (GST_CAT_PIPELINE, temp); \
201 YYPRINTF(const char *format, ...)
206 va_start (varargs, format);
207 temp = g_strdup_vprintf (format, varargs);
208 GST_CAT_LOG (GST_CAT_PIPELINE, "%s", temp);
213 # endif /* G_HAVE_ISO_VARARGS */
215 #endif /* GST_DISABLE_GST_DEBUG */
217 #define ADD_MISSING_ELEMENT(graph,name) G_STMT_START { \
218 if ((graph)->ctx) { \
219 (graph)->ctx->missing_elements = \
220 g_list_append ((graph)->ctx->missing_elements, g_strdup (name)); \
223 #define GST_BIN_MAKE(res, type, chainval, assign, free_string) \
225 chain_t *chain = chainval; \
227 GstBin *bin = (GstBin *) gst_element_factory_make (type, NULL); \
229 SET_ERROR (graph->error, GST_PARSE_ERROR_EMPTY_BIN, \
230 _("specified empty bin \"%s\", not allowed"), type); \
231 g_slist_foreach (assign, (GFunc) gst_parse_strfree, NULL); \
232 g_slist_free (assign); \
233 gst_object_unref (bin); \
235 gst_parse_strfree (type); /* Need to clean up the string */ \
238 ADD_MISSING_ELEMENT(graph, type); \
239 SET_ERROR (graph->error, GST_PARSE_ERROR_NO_SUCH_ELEMENT, \
240 _("no bin \"%s\", skipping"), type); \
241 g_slist_foreach (assign, (GFunc) gst_parse_strfree, NULL); \
242 g_slist_free (assign); \
245 for (walk = chain->elements; walk; walk = walk->next ) \
246 gst_bin_add (bin, GST_ELEMENT (walk->data)); \
247 g_slist_free (chain->elements); \
248 chain->elements = g_slist_prepend (NULL, bin); \
250 /* set the properties now */ \
251 for (walk = assign; walk; walk = walk->next) \
252 gst_parse_element_set ((gchar *) walk->data, GST_ELEMENT (bin), graph); \
253 g_slist_free (assign); \
257 #define MAKE_LINK(link, _src, _src_name, _src_pads, _sink, _sink_name, _sink_pads) \
259 link = gst_parse_link_new (); \
261 link->sink = _sink; \
262 link->src_name = _src_name; \
263 link->sink_name = _sink_name; \
264 link->src_pads = _src_pads; \
265 link->sink_pads = _sink_pads; \
269 #define MAKE_REF(link, _src, _pads) \
271 gchar *padname = _src; \
272 GSList *pads = _pads; \
274 while (*padname != '.') padname++; \
277 if (*padname != '\0') \
278 pads = g_slist_prepend (pads, gst_parse_strdup (padname)); \
280 MAKE_LINK (link, NULL, _src, pads, NULL, NULL, NULL); \
283 static void gst_parse_new_child(GstChildProxy *child_proxy, GObject *object,
286 DelayedSet *set = (DelayedSet *) data;
289 GstObject *target = NULL;
292 if (gst_child_proxy_lookup (GST_OBJECT (set->parent), set->name, &target, &pspec)) {
293 value_type = G_PARAM_SPEC_VALUE_TYPE (pspec);
295 GST_CAT_LOG (GST_CAT_PIPELINE, "parsing delayed property %s as a %s from %s", pspec->name,
296 g_type_name (value_type), set->value_str);
297 g_value_init (&v, value_type);
298 if (gst_value_deserialize (&v, set->value_str)) {
299 g_object_set_property (G_OBJECT (target), pspec->name, &v);
301 g_signal_handler_disconnect (child_proxy, set->signal_id);
303 g_free(set->value_str);
310 gst_object_unref (target);
316 gst_parse_element_set (gchar *value, GstElement *element, graph_t *graph)
321 GstObject *target = NULL;
324 /* do nothing if assignment is for missing element */
328 /* parse the string, so the property name is null-terminated an pos points
329 to the beginning of the value */
330 while (!g_ascii_isspace (*pos) && (*pos != '=')) pos++;
336 while (g_ascii_isspace (*pos)) pos++;
339 while (g_ascii_isspace (*pos)) pos++;
342 pos[strlen (pos) - 1] = '\0';
344 gst_parse_unescape (pos);
346 if (gst_child_proxy_lookup (GST_OBJECT (element), value, &target, &pspec)) {
347 value_type = G_PARAM_SPEC_VALUE_TYPE (pspec);
348 GST_CAT_LOG (GST_CAT_PIPELINE, "parsing property %s as a %s", pspec->name,
349 g_type_name (value_type));
350 g_value_init (&v, value_type);
351 if (!gst_value_deserialize (&v, pos))
353 g_object_set_property (G_OBJECT (target), pspec->name, &v);
355 /* do a delayed set */
356 if (GST_IS_CHILD_PROXY (element)) {
357 DelayedSet *data = g_new (DelayedSet, 1);
359 data->parent = element;
360 data->name = g_strdup(value);
361 data->value_str = g_strdup(pos);
362 data->signal_id = g_signal_connect(GST_OBJECT (element),"child-added", G_CALLBACK (gst_parse_new_child), data);
365 SET_ERROR (graph->error, GST_PARSE_ERROR_NO_SUCH_PROPERTY, \
366 _("no property \"%s\" in element \"%s\""), value, \
367 GST_ELEMENT_NAME (element));
372 gst_parse_strfree (value);
376 gst_object_unref (target);
380 SET_ERROR (graph->error, GST_PARSE_ERROR_COULD_NOT_SET_PROPERTY,
381 _("could not set property \"%s\" in element \"%s\" to \"%s\""),
382 value, GST_ELEMENT_NAME (element), pos);
386 gst_parse_free_link (link_t *link)
388 gst_parse_strfree (link->src_name);
389 gst_parse_strfree (link->sink_name);
390 g_slist_foreach (link->src_pads, (GFunc) gst_parse_strfree, NULL);
391 g_slist_foreach (link->sink_pads, (GFunc) gst_parse_strfree, NULL);
392 g_slist_free (link->src_pads);
393 g_slist_free (link->sink_pads);
394 if (link->caps) gst_caps_unref (link->caps);
395 gst_parse_link_free (link);
399 gst_parse_found_pad (GstElement *src, GstPad *pad, gpointer data)
401 DelayedLink *link = (DelayedLink *) data;
403 GST_CAT_INFO (GST_CAT_PIPELINE, "trying delayed linking %s:%s to %s:%s",
404 GST_STR_NULL (GST_ELEMENT_NAME (src)), GST_STR_NULL (link->src_pad),
405 GST_STR_NULL (GST_ELEMENT_NAME (link->sink)), GST_STR_NULL (link->sink_pad));
407 if (gst_element_link_pads_filtered (src, link->src_pad, link->sink,
408 link->sink_pad, link->caps)) {
409 /* do this here, we don't want to get any problems later on when
410 * unlocking states */
411 GST_CAT_DEBUG (GST_CAT_PIPELINE, "delayed linking %s:%s to %s:%s worked",
412 GST_STR_NULL (GST_ELEMENT_NAME (src)), GST_STR_NULL (link->src_pad),
413 GST_STR_NULL (GST_ELEMENT_NAME (link->sink)), GST_STR_NULL (link->sink_pad));
414 g_signal_handler_disconnect (src, link->signal_id);
415 g_free (link->src_pad);
416 g_free (link->sink_pad);
417 if (link->caps) gst_caps_unref (link->caps);
421 /* both padnames and the caps may be NULL */
423 gst_parse_perform_delayed_link (GstElement *src, const gchar *src_pad,
424 GstElement *sink, const gchar *sink_pad,
427 GList *templs = gst_element_class_get_pad_template_list (
428 GST_ELEMENT_GET_CLASS (src));
430 for (; templs; templs = templs->next) {
431 GstPadTemplate *templ = (GstPadTemplate *) templs->data;
432 if ((GST_PAD_TEMPLATE_DIRECTION (templ) == GST_PAD_SRC) &&
433 (GST_PAD_TEMPLATE_PRESENCE(templ) == GST_PAD_SOMETIMES))
435 DelayedLink *data = g_new (DelayedLink, 1);
437 /* TODO: maybe we should check if src_pad matches this template's names */
439 GST_CAT_DEBUG (GST_CAT_PIPELINE, "trying delayed link %s:%s to %s:%s",
440 GST_STR_NULL (GST_ELEMENT_NAME (src)), GST_STR_NULL (src_pad),
441 GST_STR_NULL (GST_ELEMENT_NAME (sink)), GST_STR_NULL (sink_pad));
443 data->src_pad = g_strdup (src_pad);
445 data->sink_pad = g_strdup (sink_pad);
447 data->caps = gst_caps_copy (caps);
451 data->signal_id = g_signal_connect (G_OBJECT (src), "pad-added",
452 G_CALLBACK (gst_parse_found_pad), data);
459 * performs a link and frees the struct. src and sink elements must be given
460 * return values 0 - link performed
465 gst_parse_perform_link (link_t *link, graph_t *graph)
467 GstElement *src = link->src;
468 GstElement *sink = link->sink;
469 GSList *srcs = link->src_pads;
470 GSList *sinks = link->sink_pads;
471 g_assert (GST_IS_ELEMENT (src));
472 g_assert (GST_IS_ELEMENT (sink));
474 GST_CAT_INFO (GST_CAT_PIPELINE,
475 "linking %s:%s to %s:%s (%u/%u) with caps \"%" GST_PTR_FORMAT "\"",
476 GST_ELEMENT_NAME (src), link->src_name ? link->src_name : "(any)",
477 GST_ELEMENT_NAME (sink), link->sink_name ? link->sink_name : "(any)",
478 g_slist_length (srcs), g_slist_length (sinks), link->caps);
480 if (!srcs || !sinks) {
481 if (gst_element_link_pads_filtered (src,
482 srcs ? (const gchar *) srcs->data : NULL, sink,
483 sinks ? (const gchar *) sinks->data : NULL, link->caps)) {
486 if (gst_parse_perform_delayed_link (src,
487 srcs ? (const gchar *) srcs->data : NULL,
488 sink, sinks ? (const gchar *) sinks->data : NULL, link->caps)) {
495 if (g_slist_length (link->src_pads) != g_slist_length (link->src_pads)) {
498 while (srcs && sinks) {
499 const gchar *src_pad = (const gchar *) srcs->data;
500 const gchar *sink_pad = (const gchar *) sinks->data;
501 srcs = g_slist_next (srcs);
502 sinks = g_slist_next (sinks);
503 if (gst_element_link_pads_filtered (src, src_pad, sink, sink_pad,
507 if (gst_parse_perform_delayed_link (src, src_pad,
518 gst_parse_free_link (link);
522 SET_ERROR (graph->error, GST_PARSE_ERROR_LINK,
523 _("could not link %s to %s"), GST_ELEMENT_NAME (src),
524 GST_ELEMENT_NAME (sink));
525 gst_parse_free_link (link);
530 static int yyerror (void *scanner, graph_t *graph, const char *s);
543 %token <s> IDENTIFIER
544 %left <s> REF PADREF BINREF
545 %token <s> ASSIGNMENT
551 %type <l> linkpart link
554 %type <p> padlist pads assignments
561 %parse-param { void *scanner }
562 %parse-param { graph_t *graph }
568 element: IDENTIFIER { $$ = gst_element_factory_make ($1, NULL);
570 ADD_MISSING_ELEMENT (graph, $1);
571 SET_ERROR (graph->error, GST_PARSE_ERROR_NO_SUCH_ELEMENT, _("no element \"%s\""), $1);
572 /* if FATAL_ERRORS flag is set, we don't have to worry about backwards
573 * compatibility and can continue parsing and check for other missing
575 if ((graph->flags & GST_PARSE_FLAG_FATAL_ERRORS) == 0) {
576 gst_parse_strfree ($1);
580 gst_parse_strfree ($1);
582 | element ASSIGNMENT { gst_parse_element_set ($2, $1, graph);
586 assignments: /* NOP */ { $$ = NULL; }
587 | assignments ASSIGNMENT { $$ = g_slist_prepend ($1, $2); }
589 bin: '(' assignments chain ')' { GST_BIN_MAKE ($$, "bin", $3, $2, FALSE); }
590 | BINREF assignments chain ')' { GST_BIN_MAKE ($$, $1, $3, $2, TRUE);
591 gst_parse_strfree ($1);
593 | BINREF assignments ')' { GST_BIN_MAKE ($$, $1, NULL, $2, TRUE);
594 gst_parse_strfree ($1);
596 | BINREF assignments error ')' { GST_BIN_MAKE ($$, $1, NULL, $2, TRUE);
597 gst_parse_strfree ($1);
601 pads: PADREF { $$ = g_slist_prepend (NULL, $1); }
602 | PADREF padlist { $$ = $2;
603 $$ = g_slist_prepend ($$, $1);
606 padlist: ',' IDENTIFIER { $$ = g_slist_prepend (NULL, $2); }
607 | ',' IDENTIFIER padlist { $$ = g_slist_prepend ($3, $2); }
610 reference: REF { MAKE_REF ($$, $1, NULL); }
611 | REF padlist { MAKE_REF ($$, $1, $2); }
614 linkpart: reference { $$ = $1; }
615 | pads { MAKE_REF ($$, NULL, $1); }
616 | /* NOP */ { MAKE_REF ($$, NULL, NULL); }
619 link: linkpart LINK linkpart { $$ = $1;
621 $$->caps = gst_caps_from_string ($2);
622 if ($$->caps == NULL)
623 SET_ERROR (graph->error, GST_PARSE_ERROR_LINK, _("could not parse caps \"%s\""), $2);
624 gst_parse_strfree ($2);
626 $$->sink_name = $3->src_name;
627 $$->sink_pads = $3->src_pads;
628 gst_parse_link_free ($3);
632 linklist: link { $$ = g_slist_prepend (NULL, $1); }
633 | link linklist { $$ = g_slist_prepend ($2, $1); }
634 | linklist error { $$ = $1; }
637 chain: element { $$ = gst_parse_chain_new ();
638 $$->first = $$->last = $1;
639 $$->front = $$->back = NULL;
640 $$->elements = g_slist_prepend (NULL, $1);
643 | chain chain { if ($1->back && $2->front) {
644 if (!$1->back->sink_name) {
645 SET_ERROR (graph->error, GST_PARSE_ERROR_LINK, _("link without source element"));
646 gst_parse_free_link ($1->back);
648 graph->links = g_slist_prepend (graph->links, $1->back);
650 if (!$2->front->src_name) {
651 SET_ERROR (graph->error, GST_PARSE_ERROR_LINK, _("link without sink element"));
652 gst_parse_free_link ($2->front);
654 graph->links = g_slist_prepend (graph->links, $2->front);
657 } else if ($1->back) {
658 if (!$1->back->sink_name) {
659 $1->back->sink = $2->first;
661 } else if ($2->front) {
662 if (!$2->front->src_name) {
663 $2->front->src = $1->last;
665 $1->back = $2->front;
669 graph->links = g_slist_prepend (graph->links, $1->back);
673 $1->elements = g_slist_concat ($1->elements, $2->elements);
675 gst_parse_chain_free ($2);
678 | chain linklist { GSList *walk;
680 $2 = g_slist_prepend ($2, $1->back);
683 if (!((link_t *) $2->data)->src_name) {
684 ((link_t *) $2->data)->src = $1->last;
687 for (walk = $2; walk; walk = walk->next) {
688 link_t *link = (link_t *) walk->data;
689 if (!link->sink_name && walk->next) {
690 SET_ERROR (graph->error, GST_PARSE_ERROR_LINK, _("link without sink element"));
691 gst_parse_free_link (link);
692 } else if (!link->src_name && !link->src) {
693 SET_ERROR (graph->error, GST_PARSE_ERROR_LINK, _("link without source element"));
694 gst_parse_free_link (link);
697 graph->links = g_slist_prepend (graph->links, link);
706 | chain error { $$ = $1; }
707 | link chain { if ($2->front) {
708 if (!$2->front->src_name) {
709 SET_ERROR (graph->error, GST_PARSE_ERROR_LINK, _("link without source element"));
710 gst_parse_free_link ($2->front);
712 graph->links = g_slist_prepend (graph->links, $2->front);
715 if (!$1->sink_name) {
716 $1->sink = $2->first;
721 | PARSE_URL chain { $$ = $2;
723 GstElement *element =
724 gst_element_make_from_uri (GST_URI_SRC, $1, NULL);
726 SET_ERROR (graph->error, GST_PARSE_ERROR_NO_SUCH_ELEMENT,
727 _("no source element for URI \"%s\""), $1);
729 $$->front->src = element;
730 graph->links = g_slist_prepend (
731 graph->links, $$->front);
733 $$->elements = g_slist_prepend ($$->elements, element);
736 SET_ERROR (graph->error, GST_PARSE_ERROR_LINK,
737 _("no element to link URI \"%s\" to"), $1);
741 | link PARSE_URL { GstElement *element =
742 gst_element_make_from_uri (GST_URI_SINK, $2, NULL);
744 SET_ERROR (graph->error, GST_PARSE_ERROR_NO_SUCH_ELEMENT,
745 _("no sink element for URI \"%s\""), $2);
746 gst_parse_link_free ($1);
749 } else if ($1->sink_name || $1->sink_pads) {
750 gst_object_unref (element);
751 SET_ERROR (graph->error, GST_PARSE_ERROR_LINK,
752 _("could not link sink element for URI \"%s\""), $2);
753 gst_parse_link_free ($1);
757 $$ = gst_parse_chain_new ();
758 $$->first = $$->last = element;
760 $$->front->sink = element;
761 $$->elements = g_slist_prepend (NULL, element);
766 graph: /* NOP */ { SET_ERROR (graph->error, GST_PARSE_ERROR_EMPTY, _("empty pipeline not allowed"));
769 | chain { $$ = graph;
771 if (!$1->front->src_name) {
772 SET_ERROR (graph->error, GST_PARSE_ERROR_LINK, _("link without source element"));
773 gst_parse_free_link ($1->front);
775 $$->links = g_slist_prepend ($$->links, $1->front);
780 if (!$1->back->sink_name) {
781 SET_ERROR (graph->error, GST_PARSE_ERROR_LINK, _("link without sink element"));
782 gst_parse_free_link ($1->back);
784 $$->links = g_slist_prepend ($$->links, $1->back);
796 yyerror (void *scanner, graph_t *graph, const char *s)
798 /* FIXME: This should go into the GError somehow, but how? */
799 GST_WARNING ("Error during parsing: %s", s);
805 _gst_parse_launch (const gchar *str, GError **error, GstParseContext *ctx,
815 g_return_val_if_fail (str != NULL, NULL);
816 g_return_val_if_fail (error == NULL || *error == NULL, NULL);
824 #ifdef __GST_PARSE_TRACE
825 GST_CAT_DEBUG (GST_CAT_PIPELINE, "TRACE: tracing enabled");
826 __strings = __chains = __links = 0;
827 #endif /* __GST_PARSE_TRACE */
829 dstr = g_strdup (str);
830 _gst_parse_yylex_init (&scanner);
831 _gst_parse_yy_scan_string (dstr, scanner);
837 if (yyparse (scanner, &g) != 0) {
838 SET_ERROR (error, GST_PARSE_ERROR_SYNTAX,
839 "Unrecoverable syntax error while parsing pipeline %s", str);
841 _gst_parse_yylex_destroy (scanner);
846 _gst_parse_yylex_destroy (scanner);
849 GST_CAT_DEBUG (GST_CAT_PIPELINE, "got %u elements and %u links",
850 g.chain ? g_slist_length (g.chain->elements) : 0,
851 g_slist_length (g.links));
855 } else if (!g.chain->elements->next) {
856 /* only one toplevel element */
857 ret = (GstElement *) g.chain->elements->data;
858 g_slist_free (g.chain->elements);
859 if (GST_IS_BIN (ret))
861 gst_parse_chain_free (g.chain);
863 /* put all elements in our bin */
864 bin = GST_BIN (gst_element_factory_make ("pipeline", NULL));
867 for (walk = g.chain->elements; walk; walk = walk->next) {
868 if (walk->data != NULL)
869 gst_bin_add (bin, GST_ELEMENT (walk->data));
872 g_slist_free (g.chain->elements);
873 ret = GST_ELEMENT (bin);
874 gst_parse_chain_free (g.chain);
878 for (walk = g.links; walk; walk = walk->next) {
879 link_t *l = (link_t *) walk->data;
883 l->src = gst_bin_get_by_name_recurse_up (bin, l->src_name);
885 gst_object_unref (l->src);
887 l->src = strcmp (GST_ELEMENT_NAME (ret), l->src_name) == 0 ? ret : NULL;
892 SET_ERROR (error, GST_PARSE_ERROR_NO_SUCH_ELEMENT,
893 "No element named \"%s\" - omitting link", l->src_name);
895 /* probably a missing element which we've handled already */
897 gst_parse_free_link (l);
904 l->sink = gst_bin_get_by_name_recurse_up (bin, l->sink_name);
906 gst_object_unref (l->sink);
908 l->sink = strcmp (GST_ELEMENT_NAME (ret), l->sink_name) == 0 ? ret : NULL;
913 SET_ERROR (error, GST_PARSE_ERROR_NO_SUCH_ELEMENT,
914 "No element named \"%s\" - omitting link", l->sink_name);
916 /* probably a missing element which we've handled already */
918 gst_parse_free_link (l);
922 gst_parse_perform_link (l, &g);
924 g_slist_free (g.links);
927 #ifdef __GST_PARSE_TRACE
928 GST_CAT_DEBUG (GST_CAT_PIPELINE,
929 "TRACE: %u strings, %u chains and %u links left", __strings, __chains,
931 if (__strings || __chains || __links) {
932 g_warning ("TRACE: %u strings, %u chains and %u links left", __strings,
935 #endif /* __GST_PARSE_TRACE */
941 g_slist_foreach (g.chain->elements, (GFunc)gst_object_unref, NULL);
942 g_slist_free (g.chain->elements);
943 gst_parse_chain_free (g.chain);
946 g_slist_foreach (g.links, (GFunc)gst_parse_free_link, NULL);
947 g_slist_free (g.links);