2 * Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
3 * 2000 Wim Taymans <wtay@chello.be>
7 * This library is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Library General Public
9 * License as published by the Free Software Foundation; either
10 * version 2 of the License, or (at your option) any later version.
12 * This library is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Library General Public License for more details.
17 * You should have received a copy of the GNU Library General Public
18 * License along with this library; if not, write to the
19 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
20 * Boston, MA 02111-1307, USA.
23 #define DEBUG(format,args...)
24 #define DEBUG_NOPREFIX(format,args...)
25 #define VERBOSE(format,args...)
27 #define GST_PARSE_LISTPAD(list) ((GstPad*)(list->data))
31 #include "gst_private.h"
33 #include "gstpipeline.h"
34 #include "gstthread.h"
37 typedef struct _gst_parse_priv gst_parse_priv;
38 struct _gst_parse_priv
43 GHashTable *elementcounts;
48 typedef struct _gst_parse_delayed_pad gst_parse_delayed_pad;
49 struct _gst_parse_delayed_pad
64 dynamic_connect (GstElement * element, GstPad * newpad, gpointer data)
66 dyn_connect *connect = (dyn_connect *) data;
68 if (!strcmp (gst_pad_get_name (newpad), connect->srcpadname)) {
69 gst_element_set_state (connect->pipeline, GST_STATE_PAUSED);
70 gst_pad_connect (newpad, connect->target);
71 gst_element_set_state (connect->pipeline, GST_STATE_PLAYING);
76 gst_parse_unique_name (gchar * type, gst_parse_priv * priv)
81 tmp = g_hash_table_lookup (priv->elementcounts, type);
82 count = GPOINTER_TO_INT (tmp);
84 g_hash_table_insert (priv->elementcounts, type, GINT_TO_POINTER (count));
86 return g_strdup_printf ("%s%d", type, count - 1);
92 gst_parse_launch_cmdline (int argc, char *argv[], GstBin * parent, gst_parse_priv * priv)
96 GstElement *element = NULL, *previous = NULL, *prevelement = NULL;
97 gchar closingchar = '\0';
100 gchar *sinkpadname = NULL, *srcpadname = NULL, *tempname;
102 GSList *sinkpads = NULL, *srcpads = NULL;
103 gint numsrcpads = 0, numsinkpads = 0;
105 gint elementcount = 0;
107 gboolean backref = FALSE;
111 if (GST_IS_PIPELINE (parent)) {
113 DEBUG ("in pipeline ");
115 else if (GST_IS_THREAD (parent)) {
117 DEBUG ("in thread ");
123 DEBUG_NOPREFIX ("%s\n", GST_ELEMENT_NAME (GST_ELEMENT (parent)));
127 /* FIXME this is a lame solution for problems with the first parser */
134 DEBUG ("** ARGUMENT is '%s'\n", arg);
136 /* a null that slipped through the reconstruction */
138 DEBUG ("random arg, FIXME\n");
142 /* end of the container */
144 else if (arg[0] == closingchar) {
145 /* time to finish off this bin */
146 DEBUG ("exiting container %s\n", GST_ELEMENT_NAME (GST_ELEMENT (parent)));
150 /* a pad connection */
152 else if ((ptr = strchr (arg, '!'))) {
153 DEBUG ("attempting to connect pads together....\n");
155 /* if it starts with the ! */
158 /* if there's a sinkpad... */
160 sinkpadname = &arg[1];
165 srcpadname = g_strndup (arg, (ptr - arg));
166 /* if there's a sinkpad */
167 if (len > (ptr - arg) + 1)
168 sinkpadname = &ptr[1];
173 if (srcpadname && (ptr = strchr (srcpadname, '.'))) {
174 gchar *element_name = g_strndup (arg, (ptr - srcpadname));
177 GST_DEBUG (0, "have pad for element %s\n", element_name);
178 new = gst_bin_get_by_name_recurse_up (parent, element_name);
180 GST_DEBUG (0, "element %s does not exist! trying to continue\n", element_name);
184 srcpadname = ptr + 1;
189 GST_DEBUG (0, "have srcpad %s, sinkpad %s\n", srcpadname, sinkpadname);
191 g_slist_free (srcpads);
197 if (srcpadname != NULL) {
199 /* split name at commas */
200 if ((ptr = strchr (srcpadname, ','))) {
201 tempname = g_strndup (srcpadname, (ptr - srcpadname));
202 srcpadname = &ptr[1];
205 tempname = srcpadname;
208 /* look for pad with that name */
209 if ((temppad = gst_element_get_pad (previous, tempname))) {
210 srcpads = g_slist_append (srcpads, temppad);
214 /* try to create a pad using that padtemplate name */
215 else if ((temppad = gst_element_request_pad_by_name (previous, tempname))) {
216 srcpads = g_slist_append (srcpads, temppad);
220 GST_DEBUG (0, "NO SUCH pad %s in element %s\n", tempname, GST_ELEMENT_NAME (previous));
223 GST_DEBUG (0, "have src pad %s:%s\n", GST_DEBUG_PAD_NAME (temppad));
226 /* if there is no more commas in srcpadname then we're done */
227 if (tempname == srcpadname)
233 /* check through the list to find the first sink pad */
234 GST_DEBUG (0, "CHECKING through element %s for pad named %s\n", GST_ELEMENT_NAME (previous),
236 pads = gst_element_get_pad_list (previous);
238 temppad = GST_PARSE_LISTPAD (pads);
239 GST_DEBUG (0, "have pad %s:%s\n", GST_DEBUG_PAD_NAME (temppad));
240 if (GST_IS_GHOST_PAD (temppad))
241 GST_DEBUG (0, "it's a ghost pad\n");
242 if (gst_pad_get_direction (temppad) == GST_PAD_SRC) {
243 srcpads = g_slist_append (srcpads, temppad);
247 pads = g_list_next (pads);
250 GST_DEBUG (0, "error, can't find a src pad!!!\n");
252 GST_DEBUG (0, "have src pad %s:%s\n", GST_DEBUG_PAD_NAME (GST_PARSE_LISTPAD (srcpads)));
255 /* argument with = in it */
257 else if (strstr (arg, "=")) {
260 gchar *pos = strstr (arg, "=");
262 /* we have an argument */
267 GST_DEBUG (0, "attempting to set argument '%s' to '%s' on element '%s'\n",
268 argname, argval, GST_ELEMENT_NAME (previous));
269 gst_util_set_object_arg (G_OBJECT (previous), argname, argval);
272 /* element or argument, or beginning of bin or thread */
274 else if (arg[0] == '[') {
275 /* we have the start of a name of the preceding element. */
276 /* rename previous element to next arg. */
277 if (arg[1] != '\0') {
278 fprintf (stderr, "error, unexpected junk after [\n");
279 return GST_PARSE_ERROR_SYNTAX;
283 gst_element_set_name (previous, argv[i]);
286 fprintf (stderr, "error, expected element name, found end of arguments\n");
287 return GST_PARSE_ERROR_SYNTAX;
291 fprintf (stderr, "error, expected ], found end of arguments\n");
292 return GST_PARSE_ERROR_SYNTAX;
294 else if (strcmp (argv[i], "]") != 0) {
295 fprintf (stderr, "error, expected ], found '%s'\n", argv[i]);
296 return GST_PARSE_ERROR_SYNTAX;
300 DEBUG ("have element or bin/thread\n");
301 /* if we have a bin or thread starting */
302 if (strchr ("({", arg[0])) {
304 /* create a bin and add it to the current parent */
305 element = gst_bin_new (g_strdup_printf ("bin%d", priv->bincount++));
307 fprintf (stderr, "Couldn't create a bin!\n");
308 return GST_PARSE_ERROR_CREATING_ELEMENT;
310 GST_DEBUG (0, "CREATED bin %s\n", GST_ELEMENT_NAME (element));
312 else if (arg[0] == '{') {
313 /* create a thread and add it to the current parent */
314 element = gst_thread_new (g_strdup_printf ("thread%d", priv->threadcount++));
316 fprintf (stderr, "Couldn't create a thread!\n");
317 return GST_PARSE_ERROR_CREATING_ELEMENT;
319 GST_DEBUG (0, "CREATED thread %s\n", GST_ELEMENT_NAME (element));
322 DEBUG ("error in parser, unexpected symbol, FIXME\n");
326 gst_bin_add (GST_BIN (parent), element);
328 j = gst_parse_launch_cmdline (argc - i, argv + i + 1, GST_BIN (element), priv);
329 /* check for parse error */
336 /* we have an element */
337 DEBUG ("attempting to create element '%s'\n", arg);
338 ptr = gst_parse_unique_name (arg, priv);
339 element = gst_elementfactory_make (arg, ptr);
342 #ifndef GST_DISABLE_REGISTRY
344 "Couldn't create a '%s', no such element or need to run gst-register?\n",
347 fprintf (stderr, "Couldn't create a '%s', no such element or need to load pluginn?\n",
350 return GST_PARSE_ERROR_NOSUCH_ELEMENT;
352 GST_DEBUG (0, "CREATED element %s\n", GST_ELEMENT_NAME (element));
353 gst_bin_add (GST_BIN (parent), element);
358 g_slist_free (sinkpads);
364 if (sinkpadname != NULL) {
366 /* split name at commas */
367 if ((ptr = strchr (sinkpadname, ','))) {
368 tempname = g_strndup (sinkpadname, (ptr - sinkpadname));
369 sinkpadname = &ptr[1];
372 tempname = sinkpadname;
375 /* look for pad with that name */
376 if ((temppad = gst_element_get_pad (element, tempname))) {
377 sinkpads = g_slist_append (sinkpads, temppad);
381 /* try to create a pad using that padtemplate name */
382 else if ((temppad = gst_element_request_pad_by_name (element, tempname))) {
383 sinkpads = g_slist_append (sinkpads, temppad);
387 GST_DEBUG (0, "NO SUCH pad %s in element %s\n", tempname, GST_ELEMENT_NAME (element));
390 GST_DEBUG (0, "have sink pad %s:%s\n", GST_DEBUG_PAD_NAME (temppad));
393 /* if there is no more commas in sinkpadname then we're done */
394 if (tempname == sinkpadname)
400 /* check through the list to find the first sink pad */
401 pads = gst_element_get_pad_list (element);
403 temppad = GST_PAD (pads->data);
404 pads = g_list_next (pads);
405 if (gst_pad_get_direction (temppad) == GST_PAD_SINK) {
406 sinkpads = g_slist_append (sinkpads, temppad);
414 GST_DEBUG (0, "can't find a sink pad for element\n");
416 GST_DEBUG (0, "have sink pad %s:%s\n", GST_DEBUG_PAD_NAME (GST_PARSE_LISTPAD (sinkpads)));
418 if (!srcpads && sinkpads && previous && srcpadname) {
419 dyn_connect *connect = g_malloc (sizeof (dyn_connect));
421 connect->srcpadname = srcpadname;
422 connect->target = GST_PARSE_LISTPAD (sinkpads);
423 connect->pipeline = GST_ELEMENT (parent);
425 GST_DEBUG (0, "SETTING UP dynamic connection %s:%s and %s:%s\n",
426 gst_element_get_name (previous),
427 srcpadname, GST_DEBUG_PAD_NAME (GST_PARSE_LISTPAD (sinkpads)));
429 g_signal_connect (G_OBJECT (previous), "new_pad", G_CALLBACK (dynamic_connect), connect);
432 for (j = 0; (j < numsrcpads) && (j < numsinkpads); j++) {
433 GST_DEBUG (0, "CONNECTING %s:%s and %s:%s\n",
434 GST_DEBUG_PAD_NAME (GST_PARSE_LISTPAD (g_slist_nth (srcpads, j))),
435 GST_DEBUG_PAD_NAME (GST_PARSE_LISTPAD (g_slist_nth (sinkpads, j))));
436 gst_pad_connect (GST_PARSE_LISTPAD (g_slist_nth (srcpads, j)),
437 GST_PARSE_LISTPAD (g_slist_nth (sinkpads, j)));
441 g_slist_free (srcpads);
444 g_slist_free (sinkpads);
447 /* if we're the first element, ghost all the sinkpads */
448 if (elementcount == 1 && !backref) {
449 DEBUG ("first element, ghosting all of %s's sink pads to parent %s\n",
450 GST_ELEMENT_NAME (element), GST_ELEMENT_NAME (GST_ELEMENT (parent)));
451 pads = gst_element_get_pad_list (element);
453 temppad = GST_PAD (pads->data);
454 pads = g_list_next (pads);
456 DEBUG ("much oddness, pad doesn't seem to exist\n");
457 else if (gst_pad_get_direction (temppad) == GST_PAD_SINK) {
458 gst_element_add_ghost_pad (GST_ELEMENT (parent), temppad,
459 g_strdup_printf ("%s-ghost", GST_PAD_NAME (temppad)));
460 GST_DEBUG (0, "GHOSTED %s:%s to %s as %s-ghost\n",
461 GST_DEBUG_PAD_NAME (temppad), GST_ELEMENT_NAME (GST_ELEMENT (parent)),
462 GST_PAD_NAME (temppad));
468 if (!GST_IS_BIN (element))
469 prevelement = element;
475 /* ghost all the src pads of the bin */
476 if (prevelement != NULL) {
477 DEBUG ("last element, ghosting all of %s's src pads to parent %s\n",
478 GST_ELEMENT_NAME (prevelement), GST_ELEMENT_NAME (GST_ELEMENT (parent)));
479 pads = gst_element_get_pad_list (prevelement);
481 temppad = GST_PAD (pads->data);
482 pads = g_list_next (pads);
484 DEBUG ("much oddness, pad doesn't seem to exist\n");
485 else if (gst_pad_get_direction (temppad) == GST_PAD_SRC) {
486 gst_element_add_ghost_pad (GST_ELEMENT (parent), temppad,
487 g_strdup_printf ("%s-ghost", GST_PAD_NAME (temppad)));
488 GST_DEBUG (0, "GHOSTED %s:%s to %s as %s-ghost\n",
489 GST_DEBUG_PAD_NAME (temppad), GST_ELEMENT_NAME (parent), GST_PAD_NAME (temppad));
499 DEBUG (closingchar != '\0' ? "returning IN THE WRONG PLACE\n" : "ending pipeline\n");
506 * @cmdline: the command line describing the pipeline
507 * @parent: the parent bin for the resulting pipeline
509 * Create a new pipeline based on command line syntax.
514 gst_parse_launch (const gchar * cmdline, GstBin * parent)
520 const gchar *cp, *start, *end;
522 GSList *string_list = NULL, *slist;
525 priv.threadcount = 0;
527 priv.elementcounts = NULL;
528 priv.verbose = FALSE;
531 end = cmdline + strlen (cmdline);
536 /* Extract the arguments to a gslist in reverse order */
537 for (cp = cmdline; cp < end;) {
538 i = strcspn (cp, "([{}]) \"\\");
541 temp = g_strconcat (temp, g_strndup (cp, i), NULL);
543 /* see if we have an escape char */
545 /* normal argument - copy and add to the list */
546 string_list = g_slist_prepend (string_list, temp);
551 temp = g_strconcat (temp, g_strndup (&cp[++i], 1), NULL);
557 while (cp < end && *cp == ' ') {
561 /* handle quoted arguments */
565 /* find matching quote */
566 while (cp < end && *cp != '"')
569 /* make sure we got it */
571 g_warning ("gst_parse_launch: Unbalanced quote in command line");
572 /* FIXME: The list leaks here */
576 /* copy the string sans quotes */
577 string_list = g_slist_prepend (string_list, g_strndup (start, cp - start));
579 cp += 2; /* skip the quote aswell */
582 /* brackets exist in a separate argument slot */
583 if (*cp && strchr ("([{}])", *cp)) {
584 string_list = g_slist_prepend (string_list, g_strndup (cp, 1));
590 /* now allocate the new argv array */
591 argvn = g_new0 (char *, newargc);
593 GST_DEBUG (0, "got %d args\n", newargc);
595 /* reverse the list and put the strings in the new array */
598 for (slist = string_list; slist; slist = slist->next)
599 argvn[--i] = slist->data;
601 g_slist_free (string_list);
604 for (i = 0; i < newargc; i++) {
605 GST_DEBUG (0, "arg %d is: %s\n", i, argvn[i]);
608 /* set up the elementcounts hash */
609 priv.elementcounts = g_hash_table_new (g_str_hash, g_str_equal);
612 i = gst_parse_launch_cmdline (newargc, argvn, parent, &priv);
614 /* GST_DEBUG(0, "Finished - freeing temporary argument array"); */
615 /* g_strfreev(argvn); */