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;
110 if (GST_IS_PIPELINE (parent)) {
112 DEBUG ("in pipeline ");
114 else if (GST_IS_THREAD (parent)) {
116 DEBUG ("in thread ");
122 DEBUG_NOPREFIX ("%s\n", GST_ELEMENT_NAME (GST_ELEMENT (parent)));
126 /* FIXME this is a lame solution for problems with the first parser */
133 DEBUG ("** ARGUMENT is '%s'\n", arg);
135 /* a null that slipped through the reconstruction */
137 DEBUG ("random arg, FIXME\n");
141 /* end of the container */
143 else if (arg[0] == closingchar) {
144 /* time to finish off this bin */
145 DEBUG ("exiting container %s\n", GST_ELEMENT_NAME (GST_ELEMENT (parent)));
149 /* a pad connection */
151 else if ((ptr = strchr (arg, '!'))) {
152 DEBUG ("attempting to connect pads together....\n");
154 /* if it starts with the ! */
157 /* if there's a sinkpad... */
159 sinkpadname = &arg[1];
164 srcpadname = g_strndup (arg, (ptr - arg));
165 /* if there's a sinkpad */
166 if (len > (ptr - arg) + 1)
167 sinkpadname = &ptr[1];
172 if (srcpadname && (ptr = strchr (srcpadname, '.'))) {
173 gchar *element_name = g_strndup (arg, (ptr - srcpadname));
176 GST_DEBUG (0, "have pad for element %s\n", element_name);
177 new = gst_bin_get_by_name (parent, element_name);
179 GST_DEBUG (0, "element %s does not exist! trying to continue\n", element_name);
183 srcpadname = ptr + 1;
187 GST_DEBUG (0, "have srcpad %s, sinkpad %s\n", srcpadname, sinkpadname);
189 g_slist_free (srcpads);
195 if (srcpadname != NULL) {
197 /* split name at commas */
198 if ((ptr = strchr (srcpadname, ','))) {
199 tempname = g_strndup (srcpadname, (ptr - srcpadname));
200 srcpadname = &ptr[1];
203 tempname = srcpadname;
206 /* look for pad with that name */
207 if ((temppad = gst_element_get_pad (previous, tempname))) {
208 srcpads = g_slist_append (srcpads, temppad);
212 /* try to create a pad using that padtemplate name */
213 else if ((temppad = gst_element_request_pad_by_name (previous, tempname))) {
214 srcpads = g_slist_append (srcpads, temppad);
218 GST_DEBUG (0, "NO SUCH pad %s in element %s\n", tempname, GST_ELEMENT_NAME (previous));
221 GST_DEBUG (0, "have src pad %s:%s\n", GST_DEBUG_PAD_NAME (temppad));
224 /* if there is no more commas in srcpadname then we're done */
225 if (tempname == srcpadname)
231 /* check through the list to find the first sink pad */
232 GST_DEBUG (0, "CHECKING through element %s for pad named %s\n", GST_ELEMENT_NAME (previous),
234 pads = gst_element_get_pad_list (previous);
236 temppad = GST_PARSE_LISTPAD (pads);
237 GST_DEBUG (0, "have pad %s:%s\n", GST_DEBUG_PAD_NAME (temppad));
238 if (GST_IS_GHOST_PAD (temppad))
239 GST_DEBUG (0, "it's a ghost pad\n");
240 if (gst_pad_get_direction (temppad) == GST_PAD_SRC) {
241 srcpads = g_slist_append (srcpads, temppad);
245 pads = g_list_next (pads);
248 GST_DEBUG (0, "error, can't find a src pad!!!\n");
250 GST_DEBUG (0, "have src pad %s:%s\n", GST_DEBUG_PAD_NAME (GST_PARSE_LISTPAD (srcpads)));
253 /* argument with = in it */
255 else if (strstr (arg, "=")) {
258 gchar *pos = strstr (arg, "=");
260 /* we have an argument */
265 GST_DEBUG (0, "attempting to set argument '%s' to '%s' on element '%s'\n",
266 argname, argval, GST_ELEMENT_NAME (previous));
267 gst_util_set_object_arg (G_OBJECT (previous), argname, argval);
270 /* element or argument, or beginning of bin or thread */
272 else if (arg[0] == '[') {
273 /* we have the start of a name of the preceding element. */
274 /* rename previous element to next arg. */
275 if (arg[1] != '\0') {
276 fprintf (stderr, "error, unexpected junk after [\n");
277 return GST_PARSE_ERROR_SYNTAX;
281 gst_element_set_name (previous, argv[i]);
284 fprintf (stderr, "error, expected element name, found end of arguments\n");
285 return GST_PARSE_ERROR_SYNTAX;
289 fprintf (stderr, "error, expected ], found end of arguments\n");
290 return GST_PARSE_ERROR_SYNTAX;
292 else if (strcmp (argv[i], "]") != 0) {
293 fprintf (stderr, "error, expected ], found '%s'\n", argv[i]);
294 return GST_PARSE_ERROR_SYNTAX;
298 DEBUG ("have element or bin/thread\n");
299 /* if we have a bin or thread starting */
300 if (strchr ("({", arg[0])) {
302 /* create a bin and add it to the current parent */
303 element = gst_bin_new (g_strdup_printf ("bin%d", priv->bincount++));
305 fprintf (stderr, "Couldn't create a bin!\n");
306 return GST_PARSE_ERROR_CREATING_ELEMENT;
308 GST_DEBUG (0, "CREATED bin %s\n", GST_ELEMENT_NAME (element));
310 else if (arg[0] == '{') {
311 /* create a thread and add it to the current parent */
312 element = gst_thread_new (g_strdup_printf ("thread%d", priv->threadcount++));
314 fprintf (stderr, "Couldn't create a thread!\n");
315 return GST_PARSE_ERROR_CREATING_ELEMENT;
317 GST_DEBUG (0, "CREATED thread %s\n", GST_ELEMENT_NAME (element));
320 DEBUG ("error in parser, unexpected symbol, FIXME\n");
325 j = gst_parse_launch_cmdline (argc - i, argv + i + 1, GST_BIN (element), priv);
326 /* check for parse error */
333 /* we have an element */
334 DEBUG ("attempting to create element '%s'\n", arg);
335 ptr = gst_parse_unique_name (arg, priv);
336 element = gst_elementfactory_make (arg, ptr);
339 #ifndef GST_DISABLE_REGISTRY
341 "Couldn't create a '%s', no such element or need to run gstreamer-register?\n",
344 fprintf (stderr, "Couldn't create a '%s', no such element or need to load pluginn?\n",
347 return GST_PARSE_ERROR_NOSUCH_ELEMENT;
349 GST_DEBUG (0, "CREATED element %s\n", GST_ELEMENT_NAME (element));
352 gst_bin_add (GST_BIN (parent), element);
355 g_slist_free (sinkpads);
361 if (sinkpadname != NULL) {
363 /* split name at commas */
364 if ((ptr = strchr (sinkpadname, ','))) {
365 tempname = g_strndup (sinkpadname, (ptr - sinkpadname));
366 sinkpadname = &ptr[1];
369 tempname = sinkpadname;
372 /* look for pad with that name */
373 if ((temppad = gst_element_get_pad (element, tempname))) {
374 sinkpads = g_slist_append (sinkpads, temppad);
378 /* try to create a pad using that padtemplate name */
379 else if ((temppad = gst_element_request_pad_by_name (element, tempname))) {
380 sinkpads = g_slist_append (sinkpads, temppad);
384 GST_DEBUG (0, "NO SUCH pad %s in element %s\n", tempname, GST_ELEMENT_NAME (element));
387 GST_DEBUG (0, "have sink pad %s:%s\n", GST_DEBUG_PAD_NAME (temppad));
390 /* if there is no more commas in sinkpadname then we're done */
391 if (tempname == sinkpadname)
397 /* check through the list to find the first sink pad */
398 pads = gst_element_get_pad_list (element);
400 temppad = GST_PAD (pads->data);
401 pads = g_list_next (pads);
402 if (gst_pad_get_direction (temppad) == GST_PAD_SINK) {
403 sinkpads = g_slist_append (sinkpads, temppad);
411 GST_DEBUG (0, "can't find a sink pad for element\n");
413 GST_DEBUG (0, "have sink pad %s:%s\n", GST_DEBUG_PAD_NAME (GST_PARSE_LISTPAD (sinkpads)));
415 if (!srcpads && sinkpads && previous) {
416 dyn_connect *connect = g_malloc (sizeof (dyn_connect));
418 connect->srcpadname = srcpadname;
419 connect->target = GST_PARSE_LISTPAD (sinkpads);
420 connect->pipeline = GST_ELEMENT (parent);
422 GST_DEBUG (0, "SETTING UP dynamic connection %s:%s and %s:%s\n",
423 gst_element_get_name (previous),
424 srcpadname, GST_DEBUG_PAD_NAME (GST_PARSE_LISTPAD (sinkpads)));
426 g_signal_connect (G_OBJECT (previous), "new_pad", G_CALLBACK (dynamic_connect), connect);
429 for (j = 0; (j < numsrcpads) && (j < numsinkpads); j++) {
430 GST_DEBUG (0, "CONNECTING %s:%s and %s:%s\n",
431 GST_DEBUG_PAD_NAME (GST_PARSE_LISTPAD (g_slist_nth (srcpads, j))),
432 GST_DEBUG_PAD_NAME (GST_PARSE_LISTPAD (g_slist_nth (sinkpads, j))));
433 gst_pad_connect (GST_PARSE_LISTPAD (g_slist_nth (srcpads, j)),
434 GST_PARSE_LISTPAD (g_slist_nth (sinkpads, j)));
438 g_slist_free (srcpads);
441 g_slist_free (sinkpads);
444 /* if we're the first element, ghost all the sinkpads */
445 if (elementcount == 1) {
446 DEBUG ("first element, ghosting all of %s's sink pads to parent %s\n",
447 GST_ELEMENT_NAME (element), GST_ELEMENT_NAME (GST_ELEMENT (parent)));
448 pads = gst_element_get_pad_list (element);
450 temppad = GST_PAD (pads->data);
451 pads = g_list_next (pads);
453 DEBUG ("much oddness, pad doesn't seem to exist\n");
454 else if (gst_pad_get_direction (temppad) == GST_PAD_SINK) {
455 gst_element_add_ghost_pad (GST_ELEMENT (parent), temppad,
456 g_strdup_printf ("%s-ghost", GST_PAD_NAME (temppad)));
457 GST_DEBUG (0, "GHOSTED %s:%s to %s as %s-ghost\n",
458 GST_DEBUG_PAD_NAME (temppad), GST_ELEMENT_NAME (GST_ELEMENT (parent)),
459 GST_PAD_NAME (temppad));
465 if (!GST_IS_BIN (element))
466 prevelement = element;
472 /* ghost all the src pads of the bin */
473 if (prevelement != NULL) {
474 DEBUG ("last element, ghosting all of %s's src pads to parent %s\n",
475 GST_ELEMENT_NAME (prevelement), GST_ELEMENT_NAME (GST_ELEMENT (parent)));
476 pads = gst_element_get_pad_list (prevelement);
478 temppad = GST_PAD (pads->data);
479 pads = g_list_next (pads);
481 DEBUG ("much oddness, pad doesn't seem to exist\n");
482 else if (gst_pad_get_direction (temppad) == GST_PAD_SRC) {
483 gst_element_add_ghost_pad (GST_ELEMENT (parent), temppad,
484 g_strdup_printf ("%s-ghost", GST_PAD_NAME (temppad)));
485 GST_DEBUG (0, "GHOSTED %s:%s to %s as %s-ghost\n",
486 GST_DEBUG_PAD_NAME (temppad), GST_ELEMENT_NAME (parent), GST_PAD_NAME (temppad));
496 DEBUG (closingchar != '\0' ? "returning IN THE WRONG PLACE\n" : "ending pipeline\n");
503 * @cmdline: the command line describing the pipeline
504 * @parent: the parent bin for the resulting pipeline
506 * Create a new pipeline based on command line syntax.
511 gst_parse_launch (const gchar * cmdline, GstBin * parent)
517 const gchar *cp, *start, *end;
519 GSList *string_list = NULL, *slist;
522 priv.threadcount = 0;
524 priv.elementcounts = NULL;
525 priv.verbose = FALSE;
528 end = cmdline + strlen (cmdline);
533 /* Extract the arguments to a gslist in reverse order */
534 for (cp = cmdline; cp < end;) {
535 i = strcspn (cp, "([{}]) \"\\");
538 temp = g_strconcat (temp, g_strndup (cp, i), NULL);
540 /* see if we have an escape char */
542 /* normal argument - copy and add to the list */
543 string_list = g_slist_prepend (string_list, temp);
548 temp = g_strconcat (temp, g_strndup (&cp[++i], 1), NULL);
554 while (cp < end && *cp == ' ') {
558 /* handle quoted arguments */
562 /* find matching quote */
563 while (cp < end && *cp != '"')
566 /* make sure we got it */
568 g_warning ("gst_parse_launch: Unbalanced quote in command line");
569 /* FIXME: The list leaks here */
573 /* copy the string sans quotes */
574 string_list = g_slist_prepend (string_list, g_strndup (start, cp - start));
576 cp += 2; /* skip the quote aswell */
579 /* brackets exist in a separate argument slot */
580 if (*cp && strchr ("([{}])", *cp)) {
581 string_list = g_slist_prepend (string_list, g_strndup (cp, 1));
587 /* now allocate the new argv array */
588 argvn = g_new0 (char *, newargc);
590 GST_DEBUG (0, "got %d args\n", newargc);
592 /* reverse the list and put the strings in the new array */
595 for (slist = string_list; slist; slist = slist->next)
596 argvn[--i] = slist->data;
598 g_slist_free (string_list);
601 for (i = 0; i < newargc; i++) {
602 GST_DEBUG (0, "arg %d is: %s\n", i, argvn[i]);
605 /* set up the elementcounts hash */
606 priv.elementcounts = g_hash_table_new (g_str_hash, g_str_equal);
609 i = gst_parse_launch_cmdline (newargc, argvn, parent, &priv);
611 /* GST_DEBUG(0, "Finished - freeing temporary argument array"); */
612 /* g_strfreev(argvn); */