2 #include "../gst_private.h"
4 #include <glib-object.h>
10 #include "../gst-i18n-lib.h"
12 #include "../gstconfig.h"
13 #include "../gstparse.h"
14 #include "../gstinfo.h"
15 #include "../gsterror.h"
16 #include "../gststructure.h"
17 #include "../gsturi.h"
18 #include "../gstutils.h"
19 #include "../gstvalue.h"
20 #include "../gstchildproxy.h"
23 /* All error messages in this file are user-visible and need to be translated.
24 * Don't start the message with a capital, and don't end them with a period,
25 * as they will be presented inside a sentence/error.
28 #define YYERROR_VERBOSE 1
30 #define YYENABLE_NLS 0
32 #ifndef YYLTYPE_IS_TRIVIAL
33 #define YYLTYPE_IS_TRIVIAL 0
36 #ifdef __GST_PARSE_TRACE
37 static guint __strings;
39 static guint __chains;
41 __gst_parse_strdup (gchar *org)
46 /* g_print ("ALLOCATED STR (%3u): %p %s\n", __strings, ret, ret); */
50 __gst_parse_strfree (gchar *str)
53 /* g_print ("FREEING STR (%3u): %p %s\n", __strings - 1, str, str); */
55 g_return_if_fail (__strings > 0);
59 link_t *__gst_parse_link_new ()
63 ret = g_slice_new0 (link_t);
64 /* g_print ("ALLOCATED LINK (%3u): %p\n", __links, ret); */
68 __gst_parse_link_free (link_t *data)
71 /* g_print ("FREEING LINK (%3u): %p\n", __links - 1, data); */
72 g_slice_free (link_t, data);
73 g_return_if_fail (__links > 0);
78 __gst_parse_chain_new ()
82 ret = g_slice_new0 (chain_t);
83 /* g_print ("ALLOCATED CHAIN (%3u): %p\n", __chains, ret); */
87 __gst_parse_chain_free (chain_t *data)
89 /* g_print ("FREEING CHAIN (%3u): %p\n", __chains - 1, data); */
90 g_slice_free (chain_t, data);
91 g_return_if_fail (__chains > 0);
95 #endif /* __GST_PARSE_TRACE */
111 /*** define SET_ERROR macro/function */
113 #ifdef G_HAVE_ISO_VARARGS
115 # define SET_ERROR(error, type, ...) \
117 GST_CAT_ERROR (GST_CAT_PIPELINE, __VA_ARGS__); \
118 if ((error) && !*(error)) { \
119 g_set_error ((error), GST_PARSE_ERROR, (type), __VA_ARGS__); \
123 #elif defined(G_HAVE_GNUC_VARARGS)
125 # define SET_ERROR(error, type, args...) \
127 GST_CAT_ERROR (GST_CAT_PIPELINE, args ); \
128 if ((error) && !*(error)) { \
129 g_set_error ((error), GST_PARSE_ERROR, (type), args ); \
136 SET_ERROR (GError **error, gint type, const char *format, ...)
140 g_warning ("error while parsing");
145 va_start (varargs, format);
146 string = g_strdup_vprintf (format, varargs);
149 g_set_error (error, GST_PARSE_ERROR, type, string);
156 #endif /* G_HAVE_ISO_VARARGS */
158 /*** define YYPRINTF macro/function if we're debugging */
160 /* bison 1.35 calls this macro with side effects, we need to make sure the
161 side effects work - crappy bison */
163 #ifndef GST_DISABLE_GST_DEBUG
166 # ifdef G_HAVE_ISO_VARARGS
168 /* # define YYFPRINTF(a, ...) GST_CAT_DEBUG (GST_CAT_PIPELINE, __VA_ARGS__) */
169 # define YYFPRINTF(a, ...) \
171 GST_CAT_LOG (GST_CAT_PIPELINE, __VA_ARGS__); \
174 # elif defined(G_HAVE_GNUC_VARARGS)
176 # define YYFPRINTF(a, args...) \
178 GST_CAT_LOG (GST_CAT_PIPELINE, args); \
184 YYPRINTF(const char *format, ...)
189 va_start (varargs, format);
190 temp = g_strdup_vprintf (format, varargs);
191 GST_CAT_LOG (GST_CAT_PIPELINE, "%s", temp);
196 # endif /* G_HAVE_ISO_VARARGS */
198 #endif /* GST_DISABLE_GST_DEBUG */
202 * include headers generated by bison & flex, after defining (or not defining) YYDEBUG
204 #include "grammar.tab.h"
205 #include "parse_lex.h"
208 #define ADD_MISSING_ELEMENT(graph,name) G_STMT_START { \
209 if ((graph)->ctx) { \
210 (graph)->ctx->missing_elements = \
211 g_list_append ((graph)->ctx->missing_elements, g_strdup (name)); \
215 no_free (gconstpointer foo)
220 #define GST_BIN_MAKE(res, type, chainval, assign, type_string_free_func) \
222 chain_t *chain = chainval; \
224 GstBin *bin = (GstBin *) gst_element_factory_make (type, NULL); \
226 SET_ERROR (graph->error, GST_PARSE_ERROR_EMPTY_BIN, \
227 _("specified empty bin \"%s\", not allowed"), type); \
228 g_slist_foreach (assign, (GFunc) gst_parse_strfree, NULL); \
229 g_slist_free (assign); \
230 gst_object_unref (bin); \
231 type_string_free_func (type); /* Need to clean up the string */ \
234 ADD_MISSING_ELEMENT(graph, type); \
235 SET_ERROR (graph->error, GST_PARSE_ERROR_NO_SUCH_ELEMENT, \
236 _("no bin \"%s\", skipping"), type); \
237 g_slist_foreach (assign, (GFunc) gst_parse_strfree, NULL); \
238 g_slist_free (assign); \
241 for (walk = chain->elements; walk; walk = walk->next ) \
242 gst_bin_add (bin, GST_ELEMENT (walk->data)); \
243 g_slist_free (chain->elements); \
244 chain->elements = g_slist_prepend (NULL, bin); \
246 /* set the properties now */ \
247 for (walk = assign; walk; walk = walk->next) \
248 gst_parse_element_set ((gchar *) walk->data, GST_ELEMENT (bin), graph); \
249 g_slist_free (assign); \
253 #define MAKE_LINK(link, _src, _src_name, _src_pads, _sink, _sink_name, _sink_pads) \
255 link = gst_parse_link_new (); \
257 link->sink = _sink; \
258 link->src_name = _src_name; \
259 link->sink_name = _sink_name; \
260 link->src_pads = _src_pads; \
261 link->sink_pads = _sink_pads; \
265 #define MAKE_REF(link, _src, _pads) \
267 gchar *padname = _src; \
268 GSList *pads = _pads; \
270 while (*padname != '.') padname++; \
273 if (*padname != '\0') \
274 pads = g_slist_prepend (pads, gst_parse_strdup (padname)); \
276 MAKE_LINK (link, NULL, _src, pads, NULL, NULL, NULL); \
280 gst_parse_free_delayed_set (DelayedSet *set)
283 g_free(set->value_str);
284 g_slice_free(DelayedSet, set);
287 static void gst_parse_new_child(GstChildProxy *child_proxy, GObject *object,
288 const gchar * name, gpointer data);
291 gst_parse_add_delayed_set (GstElement *element, gchar *name, gchar *value_str)
293 DelayedSet *data = g_slice_new0 (DelayedSet);
295 GST_CAT_LOG_OBJECT (GST_CAT_PIPELINE, element, "delaying property set %s to %s",
298 data->name = g_strdup(name);
299 data->value_str = g_strdup(value_str);
300 data->signal_id = g_signal_connect_data(element, "child-added",
301 G_CALLBACK (gst_parse_new_child), data, (GClosureNotify)
302 gst_parse_free_delayed_set, (GConnectFlags) 0);
304 /* FIXME: we would need to listen on all intermediate bins too */
305 if (GST_IS_BIN (element)) {
306 gchar **names, **current;
307 GstElement *parent, *child;
309 current = names = g_strsplit (name, "::", -1);
310 parent = gst_bin_get_by_name (GST_BIN_CAST (element), current[0]);
312 while (parent && current[0]) {
313 child = gst_bin_get_by_name (GST_BIN (parent), current[0]);
314 if (!child && current[1]) {
315 char *sub_name = g_strjoinv ("::", ¤t[0]);
317 gst_parse_add_delayed_set(parent, sub_name, value_str);
328 gst_parse_new_child(GstChildProxy *child_proxy, GObject *object,
329 const gchar * name, gpointer data)
331 DelayedSet *set = (DelayedSet *) data;
334 GObject *target = NULL;
337 GST_CAT_LOG_OBJECT (GST_CAT_PIPELINE, child_proxy, "new child %s, checking property %s",
340 if (gst_child_proxy_lookup (child_proxy, set->name, &target, &pspec)) {
341 gboolean got_value = FALSE;
343 value_type = pspec->value_type;
345 GST_CAT_LOG_OBJECT (GST_CAT_PIPELINE, child_proxy, "parsing delayed property %s as a %s from %s",
346 pspec->name, g_type_name (value_type), set->value_str);
347 g_value_init (&v, value_type);
348 if (gst_value_deserialize (&v, set->value_str))
350 else if (g_type_is_a (value_type, GST_TYPE_ELEMENT)) {
353 bin = gst_parse_bin_from_description_full (set->value_str, TRUE, NULL,
354 GST_PARSE_FLAG_NO_SINGLE_ELEMENT_BINS, NULL);
356 g_value_set_object (&v, bin);
360 g_signal_handler_disconnect (child_proxy, set->signal_id);
363 g_object_set_property (target, pspec->name, &v);
365 const gchar *obj_name = GST_OBJECT_NAME(object);
366 gint len = strlen (obj_name);
368 /* do a delayed set */
369 if ((strlen (set->name) > (len + 2)) && !strncmp (set->name, obj_name, len) && !strncmp (&set->name[len], "::", 2)) {
370 gst_parse_add_delayed_set (GST_ELEMENT(child_proxy), set->name, set->value_str);
378 g_object_unref (target);
382 GST_CAT_ERROR (GST_CAT_PIPELINE, "could not set property \"%s\" in %"
383 GST_PTR_FORMAT, pspec->name, target);
388 gst_parse_element_set (gchar *value, GstElement *element, graph_t *graph)
390 GParamSpec *pspec = NULL;
393 GObject *target = NULL;
396 /* do nothing if assignment is for missing element */
400 /* parse the string, so the property name is null-terminated and pos points
401 to the beginning of the value */
402 while (!g_ascii_isspace (*pos) && (*pos != '=')) pos++;
408 while (g_ascii_isspace (*pos)) pos++;
411 while (g_ascii_isspace (*pos)) pos++;
414 pos[strlen (pos) - 1] = '\0';
416 gst_parse_unescape (pos);
418 if (GST_IS_CHILD_PROXY (element)) {
419 if (!gst_child_proxy_lookup (GST_CHILD_PROXY (element), value, &target, &pspec)) {
420 /* do a delayed set */
421 gst_parse_add_delayed_set (element, value, pos);
424 pspec = g_object_class_find_property (G_OBJECT_GET_CLASS (element), value);
426 target = g_object_ref (element);
427 GST_CAT_LOG_OBJECT (GST_CAT_PIPELINE, target, "found %s property", value);
429 SET_ERROR (graph->error, GST_PARSE_ERROR_NO_SUCH_PROPERTY, \
430 _("no property \"%s\" in element \"%s\""), value, \
431 GST_ELEMENT_NAME (element));
435 if (pspec != NULL && target != NULL) {
436 gboolean got_value = FALSE;
438 value_type = pspec->value_type;
440 GST_CAT_LOG_OBJECT (GST_CAT_PIPELINE, element, "parsing property %s as a %s",
441 pspec->name, g_type_name (value_type));
443 g_value_init (&v, value_type);
444 if (gst_value_deserialize (&v, pos))
446 else if (g_type_is_a (value_type, GST_TYPE_ELEMENT)) {
449 bin = gst_parse_bin_from_description_full (pos, TRUE, NULL,
450 GST_PARSE_FLAG_NO_SINGLE_ELEMENT_BINS, NULL);
452 g_value_set_object (&v, bin);
458 g_object_set_property (target, pspec->name, &v);
462 gst_parse_strfree (value);
466 g_object_unref (target);
470 SET_ERROR (graph->error, GST_PARSE_ERROR_COULD_NOT_SET_PROPERTY,
471 _("could not set property \"%s\" in element \"%s\" to \"%s\""),
472 value, GST_ELEMENT_NAME (element), pos);
477 gst_parse_free_link (link_t *link)
479 gst_parse_strfree (link->src_name);
480 gst_parse_strfree (link->sink_name);
481 g_slist_foreach (link->src_pads, (GFunc) gst_parse_strfree, NULL);
482 g_slist_foreach (link->sink_pads, (GFunc) gst_parse_strfree, NULL);
483 g_slist_free (link->src_pads);
484 g_slist_free (link->sink_pads);
485 if (link->caps) gst_caps_unref (link->caps);
486 gst_parse_link_free (link);
490 gst_parse_free_delayed_link (DelayedLink *link)
492 g_free (link->src_pad);
493 g_free (link->sink_pad);
494 if (link->caps) gst_caps_unref (link->caps);
495 g_slice_free (DelayedLink, link);
499 gst_parse_found_pad (GstElement *src, GstPad *pad, gpointer data)
501 DelayedLink *link = data;
503 GST_CAT_INFO (GST_CAT_PIPELINE, "trying delayed linking %s:%s to %s:%s",
504 GST_STR_NULL (GST_ELEMENT_NAME (src)), GST_STR_NULL (link->src_pad),
505 GST_STR_NULL (GST_ELEMENT_NAME (link->sink)), GST_STR_NULL (link->sink_pad));
507 if (gst_element_link_pads_filtered (src, link->src_pad, link->sink,
508 link->sink_pad, link->caps)) {
509 /* do this here, we don't want to get any problems later on when
510 * unlocking states */
511 GST_CAT_DEBUG (GST_CAT_PIPELINE, "delayed linking %s:%s to %s:%s worked",
512 GST_STR_NULL (GST_ELEMENT_NAME (src)), GST_STR_NULL (link->src_pad),
513 GST_STR_NULL (GST_ELEMENT_NAME (link->sink)), GST_STR_NULL (link->sink_pad));
514 g_signal_handler_disconnect (src, link->signal_id);
518 /* both padnames and the caps may be NULL */
520 gst_parse_perform_delayed_link (GstElement *src, const gchar *src_pad,
521 GstElement *sink, const gchar *sink_pad,
524 GList *templs = gst_element_class_get_pad_template_list (
525 GST_ELEMENT_GET_CLASS (src));
527 for (; templs; templs = templs->next) {
528 GstPadTemplate *templ = (GstPadTemplate *) templs->data;
529 if ((GST_PAD_TEMPLATE_DIRECTION (templ) == GST_PAD_SRC) &&
530 (GST_PAD_TEMPLATE_PRESENCE(templ) == GST_PAD_SOMETIMES))
532 DelayedLink *data = g_slice_new (DelayedLink);
534 /* TODO: maybe we should check if src_pad matches this template's names */
536 GST_CAT_DEBUG (GST_CAT_PIPELINE, "trying delayed link %s:%s to %s:%s",
537 GST_STR_NULL (GST_ELEMENT_NAME (src)), GST_STR_NULL (src_pad),
538 GST_STR_NULL (GST_ELEMENT_NAME (sink)), GST_STR_NULL (sink_pad));
540 data->src_pad = g_strdup (src_pad);
542 data->sink_pad = g_strdup (sink_pad);
544 data->caps = gst_caps_copy (caps);
548 data->signal_id = g_signal_connect_data (src, "pad-added",
549 G_CALLBACK (gst_parse_found_pad), data,
550 (GClosureNotify) gst_parse_free_delayed_link, (GConnectFlags) 0);
558 * performs a link and frees the struct. src and sink elements must be given
559 * return values 0 - link performed
564 gst_parse_perform_link (link_t *link, graph_t *graph)
566 GstElement *src = link->src;
567 GstElement *sink = link->sink;
568 GSList *srcs = link->src_pads;
569 GSList *sinks = link->sink_pads;
570 g_assert (GST_IS_ELEMENT (src));
571 g_assert (GST_IS_ELEMENT (sink));
573 GST_CAT_INFO (GST_CAT_PIPELINE,
574 "linking %s:%s to %s:%s (%u/%u) with caps \"%" GST_PTR_FORMAT "\"",
575 GST_ELEMENT_NAME (src), link->src_name ? link->src_name : "(any)",
576 GST_ELEMENT_NAME (sink), link->sink_name ? link->sink_name : "(any)",
577 g_slist_length (srcs), g_slist_length (sinks), link->caps);
579 if (!srcs || !sinks) {
580 if (gst_element_link_pads_filtered (src,
581 srcs ? (const gchar *) srcs->data : NULL, sink,
582 sinks ? (const gchar *) sinks->data : NULL, link->caps)) {
585 if (gst_parse_perform_delayed_link (src,
586 srcs ? (const gchar *) srcs->data : NULL,
587 sink, sinks ? (const gchar *) sinks->data : NULL, link->caps)) {
594 if (g_slist_length (link->src_pads) != g_slist_length (link->sink_pads)) {
597 while (srcs && sinks) {
598 const gchar *src_pad = (const gchar *) srcs->data;
599 const gchar *sink_pad = (const gchar *) sinks->data;
600 srcs = g_slist_next (srcs);
601 sinks = g_slist_next (sinks);
602 if (gst_element_link_pads_filtered (src, src_pad, sink, sink_pad,
606 if (gst_parse_perform_delayed_link (src, src_pad,
617 gst_parse_free_link (link);
621 SET_ERROR (graph->error, GST_PARSE_ERROR_LINK,
622 _("could not link %s to %s"), GST_ELEMENT_NAME (src),
623 GST_ELEMENT_NAME (sink));
624 gst_parse_free_link (link);
629 static int yyerror (void *scanner, graph_t *graph, const char *s);
642 %token <s> IDENTIFIER
643 %left <s> REF PADREF BINREF
644 %token <s> ASSIGNMENT
650 %type <l> linkpart link
653 %type <p> padlist pads assignments
660 %lex-param { void *scanner }
661 %parse-param { void *scanner }
662 %parse-param { graph_t *graph }
668 element: IDENTIFIER { $$ = gst_element_factory_make ($1, NULL);
670 ADD_MISSING_ELEMENT (graph, $1);
671 SET_ERROR (graph->error, GST_PARSE_ERROR_NO_SUCH_ELEMENT, _("no element \"%s\""), $1);
672 /* if FATAL_ERRORS flag is set, we don't have to worry about backwards
673 * compatibility and can continue parsing and check for other missing
675 if ((graph->flags & GST_PARSE_FLAG_FATAL_ERRORS) == 0) {
676 gst_parse_strfree ($1);
680 gst_parse_strfree ($1);
682 | element ASSIGNMENT { gst_parse_element_set ($2, $1, graph);
686 assignments: /* NOP */ { $$ = NULL; }
687 | assignments ASSIGNMENT { $$ = g_slist_prepend ($1, $2); }
689 bin: '(' assignments chain ')' { GST_BIN_MAKE ($$, "bin", $3, $2, no_free); }
690 | BINREF assignments chain ')' { GST_BIN_MAKE ($$, $1, $3, $2, gst_parse_strfree);
691 gst_parse_strfree ($1);
693 | BINREF assignments ')' { GST_BIN_MAKE ($$, $1, NULL, $2, gst_parse_strfree);
694 gst_parse_strfree ($1);
696 | BINREF assignments error ')' { GST_BIN_MAKE ($$, $1, NULL, $2, gst_parse_strfree);
697 gst_parse_strfree ($1);
701 pads: PADREF { $$ = g_slist_prepend (NULL, $1); }
702 | PADREF padlist { $$ = $2;
703 $$ = g_slist_prepend ($$, $1);
706 padlist: ',' IDENTIFIER { $$ = g_slist_prepend (NULL, $2); }
707 | ',' IDENTIFIER padlist { $$ = g_slist_prepend ($3, $2); }
710 reference: REF { MAKE_REF ($$, $1, NULL); }
711 | REF padlist { MAKE_REF ($$, $1, $2); }
714 linkpart: reference { $$ = $1; }
715 | pads { MAKE_REF ($$, NULL, $1); }
716 | /* NOP */ { MAKE_REF ($$, NULL, NULL); }
719 link: linkpart LINK linkpart { $$ = $1;
721 $$->caps = gst_caps_from_string ($2);
722 if ($$->caps == NULL)
723 SET_ERROR (graph->error, GST_PARSE_ERROR_LINK, _("could not parse caps \"%s\""), $2);
724 gst_parse_strfree ($2);
726 $$->sink_name = $3->src_name;
727 $$->sink_pads = $3->src_pads;
728 gst_parse_link_free ($3);
732 linklist: link { $$ = g_slist_prepend (NULL, $1); }
733 | link linklist { $$ = g_slist_prepend ($2, $1); }
734 | linklist error { $$ = $1; }
737 chain: element { $$ = gst_parse_chain_new ();
738 $$->first = $$->last = $1;
739 $$->front = $$->back = NULL;
740 $$->elements = g_slist_prepend (NULL, $1);
743 | chain chain { if ($1->back && $2->front) {
744 if (!$1->back->sink_name) {
745 SET_ERROR (graph->error, GST_PARSE_ERROR_LINK, _("link without source element"));
746 gst_parse_free_link ($1->back);
748 graph->links = g_slist_prepend (graph->links, $1->back);
750 if (!$2->front->src_name) {
751 SET_ERROR (graph->error, GST_PARSE_ERROR_LINK, _("link without sink element"));
752 gst_parse_free_link ($2->front);
754 graph->links = g_slist_prepend (graph->links, $2->front);
757 } else if ($1->back) {
758 if (!$1->back->sink_name) {
759 $1->back->sink = $2->first;
761 } else if ($2->front) {
762 if (!$2->front->src_name) {
763 $2->front->src = $1->last;
765 $1->back = $2->front;
769 graph->links = g_slist_prepend (graph->links, $1->back);
773 $1->elements = g_slist_concat ($1->elements, $2->elements);
775 gst_parse_chain_free ($2);
778 | chain linklist { GSList *walk;
780 $2 = g_slist_prepend ($2, $1->back);
783 if (!((link_t *) $2->data)->src_name) {
784 ((link_t *) $2->data)->src = $1->last;
787 for (walk = $2; walk; walk = walk->next) {
788 link_t *link = (link_t *) walk->data;
789 if (!link->sink_name && walk->next) {
790 SET_ERROR (graph->error, GST_PARSE_ERROR_LINK, _("link without sink element"));
791 gst_parse_free_link (link);
792 } else if (!link->src_name && !link->src) {
793 SET_ERROR (graph->error, GST_PARSE_ERROR_LINK, _("link without source element"));
794 gst_parse_free_link (link);
797 graph->links = g_slist_prepend (graph->links, link);
806 | chain error { $$ = $1; }
807 | link chain { if ($2->front) {
808 if (!$2->front->src_name) {
809 SET_ERROR (graph->error, GST_PARSE_ERROR_LINK, _("link without source element"));
810 gst_parse_free_link ($2->front);
812 graph->links = g_slist_prepend (graph->links, $2->front);
815 if (!$1->sink_name) {
816 $1->sink = $2->first;
821 | PARSE_URL chain { $$ = $2;
823 GstElement *element =
824 gst_element_make_from_uri (GST_URI_SRC, $1, NULL, NULL);
825 /* FIXME: get and parse error properly */
827 SET_ERROR (graph->error, GST_PARSE_ERROR_NO_SUCH_ELEMENT,
828 _("no source element for URI \"%s\""), $1);
830 $$->front->src = element;
831 graph->links = g_slist_prepend (
832 graph->links, $$->front);
834 $$->elements = g_slist_prepend ($$->elements, element);
837 SET_ERROR (graph->error, GST_PARSE_ERROR_LINK,
838 _("no element to link URI \"%s\" to"), $1);
842 | link PARSE_URL { GstElement *element =
843 gst_element_make_from_uri (GST_URI_SINK, $2, NULL, NULL);
844 /* FIXME: get and parse error properly */
846 SET_ERROR (graph->error, GST_PARSE_ERROR_NO_SUCH_ELEMENT,
847 _("no sink element for URI \"%s\""), $2);
848 gst_parse_link_free ($1);
851 } else if ($1->sink_name || $1->sink_pads) {
852 gst_object_unref (element);
853 SET_ERROR (graph->error, GST_PARSE_ERROR_LINK,
854 _("could not link sink element for URI \"%s\""), $2);
855 gst_parse_link_free ($1);
859 $$ = gst_parse_chain_new ();
860 $$->first = $$->last = element;
862 $$->front->sink = element;
863 $$->elements = g_slist_prepend (NULL, element);
868 graph: /* NOP */ { SET_ERROR (graph->error, GST_PARSE_ERROR_EMPTY, _("empty pipeline not allowed"));
871 | chain { $$ = graph;
873 if (!$1->front->src_name) {
874 SET_ERROR (graph->error, GST_PARSE_ERROR_LINK, _("link without source element"));
875 gst_parse_free_link ($1->front);
877 $$->links = g_slist_prepend ($$->links, $1->front);
882 if (!$1->back->sink_name) {
883 SET_ERROR (graph->error, GST_PARSE_ERROR_LINK, _("link without sink element"));
884 gst_parse_free_link ($1->back);
886 $$->links = g_slist_prepend ($$->links, $1->back);
898 yyerror (void *scanner, graph_t *graph, const char *s)
900 /* FIXME: This should go into the GError somehow, but how? */
901 GST_WARNING ("Error during parsing: %s", s);
907 priv_gst_parse_launch (const gchar *str, GError **error, GstParseContext *ctx,
917 g_return_val_if_fail (str != NULL, NULL);
918 g_return_val_if_fail (error == NULL || *error == NULL, NULL);
926 #ifdef __GST_PARSE_TRACE
927 GST_CAT_DEBUG (GST_CAT_PIPELINE, "TRACE: tracing enabled");
928 __strings = __chains = __links = 0;
929 #endif /* __GST_PARSE_TRACE */
931 dstr = g_strdup (str);
932 priv_gst_parse_yylex_init (&scanner);
933 priv_gst_parse_yy_scan_string (dstr, scanner);
939 if (yyparse (scanner, &g) != 0) {
940 SET_ERROR (error, GST_PARSE_ERROR_SYNTAX,
941 "Unrecoverable syntax error while parsing pipeline %s", str);
943 priv_gst_parse_yylex_destroy (scanner);
948 priv_gst_parse_yylex_destroy (scanner);
951 GST_CAT_DEBUG (GST_CAT_PIPELINE, "got %u elements and %u links",
952 g.chain ? g_slist_length (g.chain->elements) : 0,
953 g_slist_length (g.links));
957 } else if (!g.chain->elements->next) {
958 /* only one toplevel element */
959 ret = (GstElement *) g.chain->elements->data;
960 g_slist_free (g.chain->elements);
961 if (GST_IS_BIN (ret))
963 gst_parse_chain_free (g.chain);
965 /* put all elements in our bin */
966 bin = GST_BIN (gst_element_factory_make ("pipeline", NULL));
969 for (walk = g.chain->elements; walk; walk = walk->next) {
970 if (walk->data != NULL)
971 gst_bin_add (bin, GST_ELEMENT (walk->data));
974 g_slist_free (g.chain->elements);
975 ret = GST_ELEMENT (bin);
976 gst_parse_chain_free (g.chain);
980 for (walk = g.links; walk; walk = walk->next) {
981 link_t *l = (link_t *) walk->data;
985 l->src = gst_bin_get_by_name_recurse_up (bin, l->src_name);
987 gst_object_unref (l->src);
989 l->src = strcmp (GST_ELEMENT_NAME (ret), l->src_name) == 0 ? ret : NULL;
994 SET_ERROR (error, GST_PARSE_ERROR_NO_SUCH_ELEMENT,
995 "No element named \"%s\" - omitting link", l->src_name);
997 /* probably a missing element which we've handled already */
999 gst_parse_free_link (l);
1006 l->sink = gst_bin_get_by_name_recurse_up (bin, l->sink_name);
1008 gst_object_unref (l->sink);
1010 l->sink = strcmp (GST_ELEMENT_NAME (ret), l->sink_name) == 0 ? ret : NULL;
1015 SET_ERROR (error, GST_PARSE_ERROR_NO_SUCH_ELEMENT,
1016 "No element named \"%s\" - omitting link", l->sink_name);
1018 /* probably a missing element which we've handled already */
1020 gst_parse_free_link (l);
1024 gst_parse_perform_link (l, &g);
1026 g_slist_free (g.links);
1029 #ifdef __GST_PARSE_TRACE
1030 GST_CAT_DEBUG (GST_CAT_PIPELINE,
1031 "TRACE: %u strings, %u chains and %u links left", __strings, __chains,
1033 if (__strings || __chains || __links) {
1034 g_warning ("TRACE: %u strings, %u chains and %u links left", __strings,
1037 #endif /* __GST_PARSE_TRACE */
1043 g_slist_foreach (g.chain->elements, (GFunc)gst_object_unref, NULL);
1044 g_slist_free (g.chain->elements);
1045 gst_parse_chain_free (g.chain);
1048 g_slist_foreach (g.links, (GFunc)gst_parse_free_link, NULL);
1049 g_slist_free (g.links);