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 typedef void* yyscan_t;
38 int priv_gst_parse_yylex (void * yylval_param , yyscan_t yyscanner);
39 int priv_gst_parse_yylex_init (yyscan_t scanner);
40 int priv_gst_parse_yylex_destroy (yyscan_t scanner);
41 struct yy_buffer_state * priv_gst_parse_yy_scan_string (char* , yyscan_t);
42 void _gst_parse_yypush_buffer_state (void * new_buffer ,yyscan_t yyscanner );
43 void _gst_parse_yypop_buffer_state (yyscan_t yyscanner );
45 #ifdef __GST_PARSE_TRACE
46 static guint __strings;
48 static guint __chains;
50 __gst_parse_strdup (gchar *org)
55 /* g_print ("ALLOCATED STR (%3u): %p %s\n", __strings, ret, ret); */
59 __gst_parse_strfree (gchar *str)
62 /* g_print ("FREEING STR (%3u): %p %s\n", __strings - 1, str, str); */
64 g_return_if_fail (__strings > 0);
68 link_t *__gst_parse_link_new ()
72 ret = g_slice_new0 (link_t);
73 /* g_print ("ALLOCATED LINK (%3u): %p\n", __links, ret); */
77 __gst_parse_link_free (link_t *data)
80 /* g_print ("FREEING LINK (%3u): %p\n", __links - 1, data); */
81 g_slice_free (link_t, data);
82 g_return_if_fail (__links > 0);
87 __gst_parse_chain_new ()
91 ret = g_slice_new0 (chain_t);
92 /* g_print ("ALLOCATED CHAIN (%3u): %p\n", __chains, ret); */
96 __gst_parse_chain_free (chain_t *data)
98 /* g_print ("FREEING CHAIN (%3u): %p\n", __chains - 1, data); */
99 g_slice_free (chain_t, data);
100 g_return_if_fail (__chains > 0);
104 #endif /* __GST_PARSE_TRACE */
120 /*** define SET_ERROR macro/function */
122 #ifdef G_HAVE_ISO_VARARGS
124 # define SET_ERROR(error, type, ...) \
126 GST_CAT_ERROR (GST_CAT_PIPELINE, __VA_ARGS__); \
127 if ((error) && !*(error)) { \
128 g_set_error ((error), GST_PARSE_ERROR, (type), __VA_ARGS__); \
132 #elif defined(G_HAVE_GNUC_VARARGS)
134 # define SET_ERROR(error, type, args...) \
136 GST_CAT_ERROR (GST_CAT_PIPELINE, args ); \
137 if ((error) && !*(error)) { \
138 g_set_error ((error), GST_PARSE_ERROR, (type), args ); \
145 SET_ERROR (GError **error, gint type, const char *format, ...)
149 g_warning ("error while parsing");
154 va_start (varargs, format);
155 string = g_strdup_vprintf (format, varargs);
158 g_set_error (error, GST_PARSE_ERROR, type, string);
165 #endif /* G_HAVE_ISO_VARARGS */
167 /*** define YYPRINTF macro/function if we're debugging */
169 /* bison 1.35 calls this macro with side effects, we need to make sure the
170 side effects work - crappy bison */
172 #ifndef GST_DISABLE_GST_DEBUG
175 # ifdef G_HAVE_ISO_VARARGS
177 /* # define YYFPRINTF(a, ...) GST_CAT_DEBUG (GST_CAT_PIPELINE, __VA_ARGS__) */
178 # define YYFPRINTF(a, ...) \
180 GST_CAT_LOG (GST_CAT_PIPELINE, __VA_ARGS__); \
183 # elif defined(G_HAVE_GNUC_VARARGS)
185 # define YYFPRINTF(a, args...) \
187 GST_CAT_LOG (GST_CAT_PIPELINE, args); \
193 YYPRINTF(const char *format, ...)
198 va_start (varargs, format);
199 temp = g_strdup_vprintf (format, varargs);
200 GST_CAT_LOG (GST_CAT_PIPELINE, "%s", temp);
205 # endif /* G_HAVE_ISO_VARARGS */
207 #endif /* GST_DISABLE_GST_DEBUG */
209 #define ADD_MISSING_ELEMENT(graph,name) G_STMT_START { \
210 if ((graph)->ctx) { \
211 (graph)->ctx->missing_elements = \
212 g_list_append ((graph)->ctx->missing_elements, g_strdup (name)); \
216 no_free (gconstpointer foo)
221 #define GST_BIN_MAKE(res, type, chainval, assign, type_string_free_func) \
223 chain_t *chain = chainval; \
225 GstBin *bin = (GstBin *) gst_element_factory_make (type, NULL); \
227 SET_ERROR (graph->error, GST_PARSE_ERROR_EMPTY_BIN, \
228 _("specified empty bin \"%s\", not allowed"), type); \
229 g_slist_foreach (assign, (GFunc) gst_parse_strfree, NULL); \
230 g_slist_free (assign); \
231 gst_object_unref (bin); \
232 type_string_free_func (type); /* Need to clean up the string */ \
235 ADD_MISSING_ELEMENT(graph, type); \
236 SET_ERROR (graph->error, GST_PARSE_ERROR_NO_SUCH_ELEMENT, \
237 _("no bin \"%s\", skipping"), type); \
238 g_slist_foreach (assign, (GFunc) gst_parse_strfree, NULL); \
239 g_slist_free (assign); \
242 for (walk = chain->elements; walk; walk = walk->next ) \
243 gst_bin_add (bin, GST_ELEMENT (walk->data)); \
244 g_slist_free (chain->elements); \
245 chain->elements = g_slist_prepend (NULL, bin); \
247 /* set the properties now */ \
248 for (walk = assign; walk; walk = walk->next) \
249 gst_parse_element_set ((gchar *) walk->data, GST_ELEMENT (bin), graph); \
250 g_slist_free (assign); \
254 #define MAKE_LINK(link, _src, _src_name, _src_pads, _sink, _sink_name, _sink_pads) \
256 link = gst_parse_link_new (); \
258 link->sink = _sink; \
259 link->src_name = _src_name; \
260 link->sink_name = _sink_name; \
261 link->src_pads = _src_pads; \
262 link->sink_pads = _sink_pads; \
266 #define MAKE_REF(link, _src, _pads) \
268 gchar *padname = _src; \
269 GSList *pads = _pads; \
271 while (*padname != '.') padname++; \
274 if (*padname != '\0') \
275 pads = g_slist_prepend (pads, gst_parse_strdup (padname)); \
277 MAKE_LINK (link, NULL, _src, pads, NULL, NULL, NULL); \
281 gst_parse_free_delayed_set (DelayedSet *set)
284 g_free(set->value_str);
285 g_slice_free(DelayedSet, set);
288 static void gst_parse_new_child(GstChildProxy *child_proxy, GObject *object,
289 const gchar * name, gpointer data);
292 gst_parse_add_delayed_set (GstElement *element, gchar *name, gchar *value_str)
294 DelayedSet *data = g_slice_new0 (DelayedSet);
296 GST_CAT_LOG_OBJECT (GST_CAT_PIPELINE, element, "delaying property set %s to %s",
299 data->name = g_strdup(name);
300 data->value_str = g_strdup(value_str);
301 data->signal_id = g_signal_connect_data(element, "child-added",
302 G_CALLBACK (gst_parse_new_child), data, (GClosureNotify)
303 gst_parse_free_delayed_set, (GConnectFlags) 0);
305 /* FIXME: we would need to listen on all intermediate bins too */
306 if (GST_IS_BIN (element)) {
307 gchar **names, **current;
308 GstElement *parent, *child;
310 current = names = g_strsplit (name, "::", -1);
311 parent = gst_bin_get_by_name (GST_BIN_CAST (element), current[0]);
313 while (parent && current[0]) {
314 child = gst_bin_get_by_name (GST_BIN (parent), current[0]);
315 if (!child && current[1]) {
316 char *sub_name = g_strjoinv ("::", ¤t[0]);
318 gst_parse_add_delayed_set(parent, sub_name, value_str);
329 gst_parse_new_child(GstChildProxy *child_proxy, GObject *object,
330 const gchar * name, gpointer data)
332 DelayedSet *set = (DelayedSet *) data;
335 GObject *target = NULL;
338 GST_CAT_LOG_OBJECT (GST_CAT_PIPELINE, child_proxy, "new child %s, checking property %s",
341 if (gst_child_proxy_lookup (child_proxy, set->name, &target, &pspec)) {
342 gboolean got_value = FALSE;
344 value_type = pspec->value_type;
346 GST_CAT_LOG_OBJECT (GST_CAT_PIPELINE, child_proxy, "parsing delayed property %s as a %s from %s",
347 pspec->name, g_type_name (value_type), set->value_str);
348 g_value_init (&v, value_type);
349 if (gst_value_deserialize (&v, set->value_str))
351 else if (g_type_is_a (value_type, GST_TYPE_ELEMENT)) {
354 bin = gst_parse_bin_from_description_full (set->value_str, TRUE, NULL,
355 GST_PARSE_FLAG_NO_SINGLE_ELEMENT_BINS, NULL);
357 g_value_set_object (&v, bin);
361 g_signal_handler_disconnect (child_proxy, set->signal_id);
364 g_object_set_property (target, pspec->name, &v);
366 const gchar *obj_name = GST_OBJECT_NAME(object);
367 gint len = strlen (obj_name);
369 /* do a delayed set */
370 if ((strlen (set->name) > (len + 2)) && !strncmp (set->name, obj_name, len) && !strncmp (&set->name[len], "::", 2)) {
371 gst_parse_add_delayed_set (GST_ELEMENT(child_proxy), set->name, set->value_str);
379 g_object_unref (target);
383 GST_CAT_ERROR (GST_CAT_PIPELINE, "could not set property \"%s\" in %"
384 GST_PTR_FORMAT, pspec->name, target);
389 gst_parse_element_set (gchar *value, GstElement *element, graph_t *graph)
391 GParamSpec *pspec = NULL;
394 GObject *target = NULL;
397 /* do nothing if assignment is for missing element */
401 /* parse the string, so the property name is null-terminated and pos points
402 to the beginning of the value */
403 while (!g_ascii_isspace (*pos) && (*pos != '=')) pos++;
409 while (g_ascii_isspace (*pos)) pos++;
412 while (g_ascii_isspace (*pos)) pos++;
415 pos[strlen (pos) - 1] = '\0';
417 gst_parse_unescape (pos);
419 if (GST_IS_CHILD_PROXY (element)) {
420 if (!gst_child_proxy_lookup (GST_CHILD_PROXY (element), value, &target, &pspec)) {
421 /* do a delayed set */
422 gst_parse_add_delayed_set (element, value, pos);
425 pspec = g_object_class_find_property (G_OBJECT_GET_CLASS (element), value);
427 target = g_object_ref (element);
428 GST_CAT_LOG_OBJECT (GST_CAT_PIPELINE, target, "found %s property", value);
430 SET_ERROR (graph->error, GST_PARSE_ERROR_NO_SUCH_PROPERTY, \
431 _("no property \"%s\" in element \"%s\""), value, \
432 GST_ELEMENT_NAME (element));
436 if (pspec != NULL && target != NULL) {
437 gboolean got_value = FALSE;
439 value_type = pspec->value_type;
441 GST_CAT_LOG_OBJECT (GST_CAT_PIPELINE, element, "parsing property %s as a %s",
442 pspec->name, g_type_name (value_type));
444 g_value_init (&v, value_type);
445 if (gst_value_deserialize (&v, pos))
447 else if (g_type_is_a (value_type, GST_TYPE_ELEMENT)) {
450 bin = gst_parse_bin_from_description_full (pos, TRUE, NULL,
451 GST_PARSE_FLAG_NO_SINGLE_ELEMENT_BINS, NULL);
453 g_value_set_object (&v, bin);
459 g_object_set_property (target, pspec->name, &v);
463 gst_parse_strfree (value);
467 g_object_unref (target);
471 SET_ERROR (graph->error, GST_PARSE_ERROR_COULD_NOT_SET_PROPERTY,
472 _("could not set property \"%s\" in element \"%s\" to \"%s\""),
473 value, GST_ELEMENT_NAME (element), pos);
478 gst_parse_free_link (link_t *link)
480 gst_parse_strfree (link->src_name);
481 gst_parse_strfree (link->sink_name);
482 g_slist_foreach (link->src_pads, (GFunc) gst_parse_strfree, NULL);
483 g_slist_foreach (link->sink_pads, (GFunc) gst_parse_strfree, NULL);
484 g_slist_free (link->src_pads);
485 g_slist_free (link->sink_pads);
486 if (link->caps) gst_caps_unref (link->caps);
487 gst_parse_link_free (link);
491 gst_parse_free_delayed_link (DelayedLink *link)
493 g_free (link->src_pad);
494 g_free (link->sink_pad);
495 if (link->caps) gst_caps_unref (link->caps);
496 g_slice_free (DelayedLink, link);
500 gst_parse_found_pad (GstElement *src, GstPad *pad, gpointer data)
502 DelayedLink *link = data;
504 GST_CAT_INFO (GST_CAT_PIPELINE, "trying delayed linking %s:%s to %s:%s",
505 GST_STR_NULL (GST_ELEMENT_NAME (src)), GST_STR_NULL (link->src_pad),
506 GST_STR_NULL (GST_ELEMENT_NAME (link->sink)), GST_STR_NULL (link->sink_pad));
508 if (gst_element_link_pads_filtered (src, link->src_pad, link->sink,
509 link->sink_pad, link->caps)) {
510 /* do this here, we don't want to get any problems later on when
511 * unlocking states */
512 GST_CAT_DEBUG (GST_CAT_PIPELINE, "delayed linking %s:%s to %s:%s worked",
513 GST_STR_NULL (GST_ELEMENT_NAME (src)), GST_STR_NULL (link->src_pad),
514 GST_STR_NULL (GST_ELEMENT_NAME (link->sink)), GST_STR_NULL (link->sink_pad));
515 g_signal_handler_disconnect (src, link->signal_id);
519 /* both padnames and the caps may be NULL */
521 gst_parse_perform_delayed_link (GstElement *src, const gchar *src_pad,
522 GstElement *sink, const gchar *sink_pad,
525 GList *templs = gst_element_class_get_pad_template_list (
526 GST_ELEMENT_GET_CLASS (src));
528 for (; templs; templs = templs->next) {
529 GstPadTemplate *templ = (GstPadTemplate *) templs->data;
530 if ((GST_PAD_TEMPLATE_DIRECTION (templ) == GST_PAD_SRC) &&
531 (GST_PAD_TEMPLATE_PRESENCE(templ) == GST_PAD_SOMETIMES))
533 DelayedLink *data = g_slice_new (DelayedLink);
535 /* TODO: maybe we should check if src_pad matches this template's names */
537 GST_CAT_DEBUG (GST_CAT_PIPELINE, "trying delayed link %s:%s to %s:%s",
538 GST_STR_NULL (GST_ELEMENT_NAME (src)), GST_STR_NULL (src_pad),
539 GST_STR_NULL (GST_ELEMENT_NAME (sink)), GST_STR_NULL (sink_pad));
541 data->src_pad = g_strdup (src_pad);
543 data->sink_pad = g_strdup (sink_pad);
545 data->caps = gst_caps_copy (caps);
549 data->signal_id = g_signal_connect_data (src, "pad-added",
550 G_CALLBACK (gst_parse_found_pad), data,
551 (GClosureNotify) gst_parse_free_delayed_link, (GConnectFlags) 0);
559 * performs a link and frees the struct. src and sink elements must be given
560 * return values 0 - link performed
565 gst_parse_perform_link (link_t *link, graph_t *graph)
567 GstElement *src = link->src;
568 GstElement *sink = link->sink;
569 GSList *srcs = link->src_pads;
570 GSList *sinks = link->sink_pads;
571 g_assert (GST_IS_ELEMENT (src));
572 g_assert (GST_IS_ELEMENT (sink));
574 GST_CAT_INFO (GST_CAT_PIPELINE,
575 "linking %s:%s to %s:%s (%u/%u) with caps \"%" GST_PTR_FORMAT "\"",
576 GST_ELEMENT_NAME (src), link->src_name ? link->src_name : "(any)",
577 GST_ELEMENT_NAME (sink), link->sink_name ? link->sink_name : "(any)",
578 g_slist_length (srcs), g_slist_length (sinks), link->caps);
580 if (!srcs || !sinks) {
581 if (gst_element_link_pads_filtered (src,
582 srcs ? (const gchar *) srcs->data : NULL, sink,
583 sinks ? (const gchar *) sinks->data : NULL, link->caps)) {
586 if (gst_parse_perform_delayed_link (src,
587 srcs ? (const gchar *) srcs->data : NULL,
588 sink, sinks ? (const gchar *) sinks->data : NULL, link->caps)) {
595 if (g_slist_length (link->src_pads) != g_slist_length (link->sink_pads)) {
598 while (srcs && sinks) {
599 const gchar *src_pad = (const gchar *) srcs->data;
600 const gchar *sink_pad = (const gchar *) sinks->data;
601 srcs = g_slist_next (srcs);
602 sinks = g_slist_next (sinks);
603 if (gst_element_link_pads_filtered (src, src_pad, sink, sink_pad,
607 if (gst_parse_perform_delayed_link (src, src_pad,
618 gst_parse_free_link (link);
622 SET_ERROR (graph->error, GST_PARSE_ERROR_LINK,
623 _("could not link %s to %s"), GST_ELEMENT_NAME (src),
624 GST_ELEMENT_NAME (sink));
625 gst_parse_free_link (link);
630 static int yyerror (void *scanner, graph_t *graph, const char *s);
643 %token <s> IDENTIFIER
644 %left <s> REF PADREF BINREF
645 %token <s> ASSIGNMENT
651 %type <l> linkpart link
654 %type <p> padlist pads assignments
661 %lex-param { void *scanner }
662 %parse-param { void *scanner }
663 %parse-param { graph_t *graph }
669 element: IDENTIFIER { $$ = gst_element_factory_make ($1, NULL);
671 ADD_MISSING_ELEMENT (graph, $1);
672 SET_ERROR (graph->error, GST_PARSE_ERROR_NO_SUCH_ELEMENT, _("no element \"%s\""), $1);
673 /* if FATAL_ERRORS flag is set, we don't have to worry about backwards
674 * compatibility and can continue parsing and check for other missing
676 if ((graph->flags & GST_PARSE_FLAG_FATAL_ERRORS) == 0) {
677 gst_parse_strfree ($1);
681 gst_parse_strfree ($1);
683 | element ASSIGNMENT { gst_parse_element_set ($2, $1, graph);
687 assignments: /* NOP */ { $$ = NULL; }
688 | assignments ASSIGNMENT { $$ = g_slist_prepend ($1, $2); }
690 bin: '(' assignments chain ')' { GST_BIN_MAKE ($$, "bin", $3, $2, no_free); }
691 | BINREF assignments chain ')' { GST_BIN_MAKE ($$, $1, $3, $2, gst_parse_strfree);
692 gst_parse_strfree ($1);
694 | BINREF assignments ')' { GST_BIN_MAKE ($$, $1, NULL, $2, gst_parse_strfree);
695 gst_parse_strfree ($1);
697 | BINREF assignments error ')' { GST_BIN_MAKE ($$, $1, NULL, $2, gst_parse_strfree);
698 gst_parse_strfree ($1);
702 pads: PADREF { $$ = g_slist_prepend (NULL, $1); }
703 | PADREF padlist { $$ = $2;
704 $$ = g_slist_prepend ($$, $1);
707 padlist: ',' IDENTIFIER { $$ = g_slist_prepend (NULL, $2); }
708 | ',' IDENTIFIER padlist { $$ = g_slist_prepend ($3, $2); }
711 reference: REF { MAKE_REF ($$, $1, NULL); }
712 | REF padlist { MAKE_REF ($$, $1, $2); }
715 linkpart: reference { $$ = $1; }
716 | pads { MAKE_REF ($$, NULL, $1); }
717 | /* NOP */ { MAKE_REF ($$, NULL, NULL); }
720 link: linkpart LINK linkpart { $$ = $1;
722 $$->caps = gst_caps_from_string ($2);
723 if ($$->caps == NULL)
724 SET_ERROR (graph->error, GST_PARSE_ERROR_LINK, _("could not parse caps \"%s\""), $2);
725 gst_parse_strfree ($2);
727 $$->sink_name = $3->src_name;
728 $$->sink_pads = $3->src_pads;
729 gst_parse_link_free ($3);
733 linklist: link { $$ = g_slist_prepend (NULL, $1); }
734 | link linklist { $$ = g_slist_prepend ($2, $1); }
735 | linklist error { $$ = $1; }
738 chain: element { $$ = gst_parse_chain_new ();
739 $$->first = $$->last = $1;
740 $$->front = $$->back = NULL;
741 $$->elements = g_slist_prepend (NULL, $1);
744 | chain chain { if ($1->back && $2->front) {
745 if (!$1->back->sink_name) {
746 SET_ERROR (graph->error, GST_PARSE_ERROR_LINK, _("link without source element"));
747 gst_parse_free_link ($1->back);
749 graph->links = g_slist_prepend (graph->links, $1->back);
751 if (!$2->front->src_name) {
752 SET_ERROR (graph->error, GST_PARSE_ERROR_LINK, _("link without sink element"));
753 gst_parse_free_link ($2->front);
755 graph->links = g_slist_prepend (graph->links, $2->front);
758 } else if ($1->back) {
759 if (!$1->back->sink_name) {
760 $1->back->sink = $2->first;
762 } else if ($2->front) {
763 if (!$2->front->src_name) {
764 $2->front->src = $1->last;
766 $1->back = $2->front;
770 graph->links = g_slist_prepend (graph->links, $1->back);
774 $1->elements = g_slist_concat ($1->elements, $2->elements);
776 gst_parse_chain_free ($2);
779 | chain linklist { GSList *walk;
781 $2 = g_slist_prepend ($2, $1->back);
784 if (!((link_t *) $2->data)->src_name) {
785 ((link_t *) $2->data)->src = $1->last;
788 for (walk = $2; walk; walk = walk->next) {
789 link_t *link = (link_t *) walk->data;
790 if (!link->sink_name && walk->next) {
791 SET_ERROR (graph->error, GST_PARSE_ERROR_LINK, _("link without sink element"));
792 gst_parse_free_link (link);
793 } else if (!link->src_name && !link->src) {
794 SET_ERROR (graph->error, GST_PARSE_ERROR_LINK, _("link without source element"));
795 gst_parse_free_link (link);
798 graph->links = g_slist_prepend (graph->links, link);
807 | chain error { $$ = $1; }
808 | link chain { if ($2->front) {
809 if (!$2->front->src_name) {
810 SET_ERROR (graph->error, GST_PARSE_ERROR_LINK, _("link without source element"));
811 gst_parse_free_link ($2->front);
813 graph->links = g_slist_prepend (graph->links, $2->front);
816 if (!$1->sink_name) {
817 $1->sink = $2->first;
822 | PARSE_URL chain { $$ = $2;
824 GstElement *element =
825 gst_element_make_from_uri (GST_URI_SRC, $1, NULL, NULL);
826 /* FIXME: get and parse error properly */
828 SET_ERROR (graph->error, GST_PARSE_ERROR_NO_SUCH_ELEMENT,
829 _("no source element for URI \"%s\""), $1);
831 $$->front->src = element;
832 graph->links = g_slist_prepend (
833 graph->links, $$->front);
835 $$->elements = g_slist_prepend ($$->elements, element);
838 SET_ERROR (graph->error, GST_PARSE_ERROR_LINK,
839 _("no element to link URI \"%s\" to"), $1);
843 | link PARSE_URL { GstElement *element =
844 gst_element_make_from_uri (GST_URI_SINK, $2, NULL, NULL);
845 /* FIXME: get and parse error properly */
847 SET_ERROR (graph->error, GST_PARSE_ERROR_NO_SUCH_ELEMENT,
848 _("no sink element for URI \"%s\""), $2);
849 gst_parse_link_free ($1);
852 } else if ($1->sink_name || $1->sink_pads) {
853 gst_object_unref (element);
854 SET_ERROR (graph->error, GST_PARSE_ERROR_LINK,
855 _("could not link sink element for URI \"%s\""), $2);
856 gst_parse_link_free ($1);
860 $$ = gst_parse_chain_new ();
861 $$->first = $$->last = element;
863 $$->front->sink = element;
864 $$->elements = g_slist_prepend (NULL, element);
869 graph: /* NOP */ { SET_ERROR (graph->error, GST_PARSE_ERROR_EMPTY, _("empty pipeline not allowed"));
872 | chain { $$ = graph;
874 if (!$1->front->src_name) {
875 SET_ERROR (graph->error, GST_PARSE_ERROR_LINK, _("link without source element"));
876 gst_parse_free_link ($1->front);
878 $$->links = g_slist_prepend ($$->links, $1->front);
883 if (!$1->back->sink_name) {
884 SET_ERROR (graph->error, GST_PARSE_ERROR_LINK, _("link without sink element"));
885 gst_parse_free_link ($1->back);
887 $$->links = g_slist_prepend ($$->links, $1->back);
899 yyerror (void *scanner, graph_t *graph, const char *s)
901 /* FIXME: This should go into the GError somehow, but how? */
902 GST_WARNING ("Error during parsing: %s", s);
908 priv_gst_parse_launch (const gchar *str, GError **error, GstParseContext *ctx,
918 g_return_val_if_fail (str != NULL, NULL);
919 g_return_val_if_fail (error == NULL || *error == NULL, NULL);
927 #ifdef __GST_PARSE_TRACE
928 GST_CAT_DEBUG (GST_CAT_PIPELINE, "TRACE: tracing enabled");
929 __strings = __chains = __links = 0;
930 #endif /* __GST_PARSE_TRACE */
932 dstr = g_strdup (str);
933 priv_gst_parse_yylex_init (&scanner);
934 priv_gst_parse_yy_scan_string (dstr, scanner);
940 if (yyparse (scanner, &g) != 0) {
941 SET_ERROR (error, GST_PARSE_ERROR_SYNTAX,
942 "Unrecoverable syntax error while parsing pipeline %s", str);
944 priv_gst_parse_yylex_destroy (scanner);
949 priv_gst_parse_yylex_destroy (scanner);
952 GST_CAT_DEBUG (GST_CAT_PIPELINE, "got %u elements and %u links",
953 g.chain ? g_slist_length (g.chain->elements) : 0,
954 g_slist_length (g.links));
958 } else if (!g.chain->elements->next) {
959 /* only one toplevel element */
960 ret = (GstElement *) g.chain->elements->data;
961 g_slist_free (g.chain->elements);
962 if (GST_IS_BIN (ret))
964 gst_parse_chain_free (g.chain);
966 /* put all elements in our bin */
967 bin = GST_BIN (gst_element_factory_make ("pipeline", NULL));
970 for (walk = g.chain->elements; walk; walk = walk->next) {
971 if (walk->data != NULL)
972 gst_bin_add (bin, GST_ELEMENT (walk->data));
975 g_slist_free (g.chain->elements);
976 ret = GST_ELEMENT (bin);
977 gst_parse_chain_free (g.chain);
981 for (walk = g.links; walk; walk = walk->next) {
982 link_t *l = (link_t *) walk->data;
986 l->src = gst_bin_get_by_name_recurse_up (bin, l->src_name);
988 gst_object_unref (l->src);
990 l->src = strcmp (GST_ELEMENT_NAME (ret), l->src_name) == 0 ? ret : NULL;
995 SET_ERROR (error, GST_PARSE_ERROR_NO_SUCH_ELEMENT,
996 "No element named \"%s\" - omitting link", l->src_name);
998 /* probably a missing element which we've handled already */
1000 gst_parse_free_link (l);
1007 l->sink = gst_bin_get_by_name_recurse_up (bin, l->sink_name);
1009 gst_object_unref (l->sink);
1011 l->sink = strcmp (GST_ELEMENT_NAME (ret), l->sink_name) == 0 ? ret : NULL;
1016 SET_ERROR (error, GST_PARSE_ERROR_NO_SUCH_ELEMENT,
1017 "No element named \"%s\" - omitting link", l->sink_name);
1019 /* probably a missing element which we've handled already */
1021 gst_parse_free_link (l);
1025 gst_parse_perform_link (l, &g);
1027 g_slist_free (g.links);
1030 #ifdef __GST_PARSE_TRACE
1031 GST_CAT_DEBUG (GST_CAT_PIPELINE,
1032 "TRACE: %u strings, %u chains and %u links left", __strings, __chains,
1034 if (__strings || __chains || __links) {
1035 g_warning ("TRACE: %u strings, %u chains and %u links left", __strings,
1038 #endif /* __GST_PARSE_TRACE */
1044 g_slist_foreach (g.chain->elements, (GFunc)gst_object_unref, NULL);
1045 g_slist_free (g.chain->elements);
1046 gst_parse_chain_free (g.chain);
1049 g_slist_foreach (g.links, (GFunc)gst_parse_free_link, NULL);
1050 g_slist_free (g.links);