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)));
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 GST_DEBUG (0, "have srcpad %s, sinkpad %s\n", srcpadname, sinkpadname);
174 g_slist_free (srcpads);
180 if (srcpadname != NULL) {
182 // split name at commas
183 if ((ptr = strchr (srcpadname, ','))) {
184 tempname = g_strndup (srcpadname, (ptr - srcpadname));
185 srcpadname = &ptr[1];
188 tempname = srcpadname;
191 // look for pad with that name
192 if ((temppad = gst_element_get_pad (previous, tempname))) {
193 srcpads = g_slist_append (srcpads, temppad);
197 // try to create a pad using that padtemplate name
198 else if ((temppad = gst_element_request_pad_by_name (previous, tempname))) {
199 srcpads = g_slist_append (srcpads, temppad);
203 GST_DEBUG (0, "NO SUCH pad %s in element %s\n", tempname, GST_ELEMENT_NAME (previous));
206 GST_DEBUG (0, "have src pad %s:%s\n", GST_DEBUG_PAD_NAME (temppad));
209 // if there is no more commas in srcpadname then we're done
210 if (tempname == srcpadname)
216 // check through the list to find the first sink pad
217 GST_DEBUG (0, "CHECKING through element %s for pad named %s\n", GST_ELEMENT_NAME (previous),
219 pads = gst_element_get_pad_list (previous);
221 temppad = GST_PARSE_LISTPAD (pads);
222 GST_DEBUG (0, "have pad %s:%s\n", GST_DEBUG_PAD_NAME (temppad));
223 if (GST_IS_GHOST_PAD (temppad))
224 GST_DEBUG (0, "it's a ghost pad\n");
225 if (gst_pad_get_direction (temppad) == GST_PAD_SRC) {
226 srcpads = g_slist_append (srcpads, temppad);
230 pads = g_list_next (pads);
233 GST_DEBUG (0, "error, can't find a src pad!!!\n");
235 GST_DEBUG (0, "have src pad %s:%s\n", GST_DEBUG_PAD_NAME (GST_PARSE_LISTPAD (srcpads)));
238 // argument with = in it
240 else if (strstr (arg, "=")) {
243 gchar *pos = strstr (arg, "=");
245 // we have an argument
250 GST_DEBUG (0, "attempting to set argument '%s' to '%s' on element '%s'\n",
251 argname, argval, GST_ELEMENT_NAME (previous));
252 gst_util_set_object_arg (G_OBJECT (previous), argname, argval);
255 // element or argument, or beginning of bin or thread
257 else if (arg[0] == '[') {
258 // we have the start of a name of the preceding element.
259 // rename previous element to next arg.
260 if (arg[1] != '\0') {
261 fprintf (stderr, "error, unexpected junk after [\n");
262 return GST_PARSE_ERROR_SYNTAX;
266 gst_element_set_name (previous, argv[i]);
269 fprintf (stderr, "error, expected element name, found end of arguments\n");
270 return GST_PARSE_ERROR_SYNTAX;
274 fprintf (stderr, "error, expected ], found end of arguments\n");
275 return GST_PARSE_ERROR_SYNTAX;
277 else if (strcmp (argv[i], "]") != 0) {
278 fprintf (stderr, "error, expected ], found '%s'\n", argv[i]);
279 return GST_PARSE_ERROR_SYNTAX;
283 DEBUG ("have element or bin/thread\n");
284 // if we have a bin or thread starting
285 if (strchr ("({", arg[0])) {
287 // create a bin and add it to the current parent
288 element = gst_bin_new (g_strdup_printf ("bin%d", priv->bincount++));
290 fprintf (stderr, "Couldn't create a bin!\n");
291 return GST_PARSE_ERROR_CREATING_ELEMENT;
293 GST_DEBUG (0, "CREATED bin %s\n", GST_ELEMENT_NAME (element));
295 else if (arg[0] == '{') {
296 // create a thread and add it to the current parent
297 element = gst_thread_new (g_strdup_printf ("thread%d", priv->threadcount++));
299 fprintf (stderr, "Couldn't create a thread!\n");
300 return GST_PARSE_ERROR_CREATING_ELEMENT;
302 GST_DEBUG (0, "CREATED thread %s\n", GST_ELEMENT_NAME (element));
305 DEBUG ("error in parser, unexpected symbol, FIXME\n");
310 j = gst_parse_launch_cmdline (argc - i, argv + i + 1, GST_BIN (element), priv);
311 //check for parse error
318 // we have an element
319 DEBUG ("attempting to create element '%s'\n", arg);
320 ptr = gst_parse_unique_name (arg, priv);
321 element = gst_elementfactory_make (arg, ptr);
324 #ifndef GST_DISABLE_REGISTRY
326 "Couldn't create a '%s', no such element or need to run gstreamer-register?\n",
329 fprintf (stderr, "Couldn't create a '%s', no such element or need to load pluginn?\n",
332 return GST_PARSE_ERROR_NOSUCH_ELEMENT;
334 GST_DEBUG (0, "CREATED element %s\n", GST_ELEMENT_NAME (element));
337 gst_bin_add (GST_BIN (parent), element);
340 g_slist_free (sinkpads);
346 if (sinkpadname != NULL) {
348 // split name at commas
349 if ((ptr = strchr (sinkpadname, ','))) {
350 tempname = g_strndup (sinkpadname, (ptr - sinkpadname));
351 sinkpadname = &ptr[1];
354 tempname = sinkpadname;
357 // look for pad with that name
358 if ((temppad = gst_element_get_pad (element, tempname))) {
359 sinkpads = g_slist_append (sinkpads, temppad);
363 // try to create a pad using that padtemplate name
364 else if ((temppad = gst_element_request_pad_by_name (element, tempname))) {
365 sinkpads = g_slist_append (sinkpads, temppad);
369 GST_DEBUG (0, "NO SUCH pad %s in element %s\n", tempname, GST_ELEMENT_NAME (element));
372 GST_DEBUG (0, "have sink pad %s:%s\n", GST_DEBUG_PAD_NAME (temppad));
375 // if there is no more commas in sinkpadname then we're done
376 if (tempname == sinkpadname)
382 // check through the list to find the first sink pad
383 pads = gst_element_get_pad_list (element);
385 temppad = GST_PAD (pads->data);
386 pads = g_list_next (pads);
387 if (gst_pad_get_direction (temppad) == GST_PAD_SINK) {
388 sinkpads = g_slist_append (sinkpads, temppad);
396 GST_DEBUG (0, "can't find a sink pad for element\n");
398 GST_DEBUG (0, "have sink pad %s:%s\n", GST_DEBUG_PAD_NAME (GST_PARSE_LISTPAD (sinkpads)));
400 if (!srcpads && sinkpads && previous) {
401 dyn_connect *connect = g_malloc (sizeof (dyn_connect));
403 connect->srcpadname = srcpadname;
404 connect->target = GST_PARSE_LISTPAD (sinkpads);
405 connect->pipeline = GST_ELEMENT (parent);
407 GST_DEBUG (0, "SETTING UP dynamic connection %s:%s and %s:%s\n",
408 gst_element_get_name (previous),
409 srcpadname, GST_DEBUG_PAD_NAME (GST_PARSE_LISTPAD (sinkpads)));
411 g_signal_connect (G_OBJECT (previous), "new_pad", G_CALLBACK (dynamic_connect), connect);
414 for (j = 0; (j < numsrcpads) && (j < numsinkpads); j++) {
415 GST_DEBUG (0, "CONNECTING %s:%s and %s:%s\n",
416 GST_DEBUG_PAD_NAME (GST_PARSE_LISTPAD (g_slist_nth (srcpads, j))),
417 GST_DEBUG_PAD_NAME (GST_PARSE_LISTPAD (g_slist_nth (sinkpads, j))));
418 gst_pad_connect (GST_PARSE_LISTPAD (g_slist_nth (srcpads, j)),
419 GST_PARSE_LISTPAD (g_slist_nth (sinkpads, j)));
423 g_slist_free (srcpads);
426 g_slist_free (sinkpads);
429 // if we're the first element, ghost all the sinkpads
430 if (elementcount == 1) {
431 DEBUG ("first element, ghosting all of %s's sink pads to parent %s\n",
432 GST_ELEMENT_NAME (element), GST_ELEMENT_NAME (GST_ELEMENT (parent)));
433 pads = gst_element_get_pad_list (element);
435 temppad = GST_PAD (pads->data);
436 pads = g_list_next (pads);
438 DEBUG ("much oddness, pad doesn't seem to exist\n");
439 else if (gst_pad_get_direction (temppad) == GST_PAD_SINK) {
440 gst_element_add_ghost_pad (GST_ELEMENT (parent), temppad,
441 g_strdup_printf ("%s-ghost", GST_PAD_NAME (temppad)));
442 GST_DEBUG (0, "GHOSTED %s:%s to %s as %s-ghost\n",
443 GST_DEBUG_PAD_NAME (temppad), GST_ELEMENT_NAME (GST_ELEMENT (parent)),
444 GST_PAD_NAME (temppad));
450 if (!GST_IS_BIN (element))
451 prevelement = element;
457 // ghost all the src pads of the bin
458 if (prevelement != NULL) {
459 DEBUG ("last element, ghosting all of %s's src pads to parent %s\n",
460 GST_ELEMENT_NAME (prevelement), GST_ELEMENT_NAME (GST_ELEMENT (parent)));
461 pads = gst_element_get_pad_list (prevelement);
463 temppad = GST_PAD (pads->data);
464 pads = g_list_next (pads);
466 DEBUG ("much oddness, pad doesn't seem to exist\n");
467 else if (gst_pad_get_direction (temppad) == GST_PAD_SRC) {
468 gst_element_add_ghost_pad (GST_ELEMENT (parent), temppad,
469 g_strdup_printf ("%s-ghost", GST_PAD_NAME (temppad)));
470 GST_DEBUG (0, "GHOSTED %s:%s to %s as %s-ghost\n",
471 GST_DEBUG_PAD_NAME (temppad), GST_ELEMENT_NAME (parent), GST_PAD_NAME (temppad));
481 DEBUG (closingchar != '\0' ? "returning IN THE WRONG PLACE\n" : "ending pipeline\n");
488 * @cmdline: the command line describing the pipeline
489 * @parent: the parent bin for the resulting pipeline
491 * Create a new pipeline based on command line syntax.
496 gst_parse_launch (const gchar * cmdline, GstBin * parent)
502 const gchar *cp, *start, *end;
504 GSList *string_list = NULL, *slist;
507 priv.threadcount = 0;
509 priv.elementcounts = NULL;
510 priv.verbose = FALSE;
513 end = cmdline + strlen (cmdline);
518 // Extract the arguments to a gslist in reverse order
519 for (cp = cmdline; cp < end;) {
520 i = strcspn (cp, "([{}]) \"\\");
523 temp = g_strconcat (temp, g_strndup (cp, i), NULL);
525 // see if we have an escape char
527 // normal argument - copy and add to the list
528 string_list = g_slist_prepend (string_list, temp);
533 temp = g_strconcat (temp, g_strndup (&cp[++i], 1), NULL);
539 while (cp < end && *cp == ' ') {
543 // handle quoted arguments
547 // find matching quote
548 while (cp < end && *cp != '"')
551 // make sure we got it
553 g_warning ("gst_parse_launch: Unbalanced quote in command line");
554 // FIXME: The list leaks here
558 // copy the string sans quotes
559 string_list = g_slist_prepend (string_list, g_strndup (start, cp - start));
561 cp += 2; // skip the quote aswell
564 // brackets exist in a separate argument slot
565 if (*cp && strchr ("([{}])", *cp)) {
566 string_list = g_slist_prepend (string_list, g_strndup (cp, 1));
572 // now allocate the new argv array
573 argvn = g_new0 (char *, newargc);
575 GST_DEBUG (0, "got %d args\n", newargc);
577 // reverse the list and put the strings in the new array
580 for (slist = string_list; slist; slist = slist->next)
581 argvn[--i] = slist->data;
583 g_slist_free (string_list);
586 for (i = 0; i < newargc; i++) {
587 GST_DEBUG (0, "arg %d is: %s\n", i, argvn[i]);
590 // set up the elementcounts hash
591 priv.elementcounts = g_hash_table_new (g_str_hash, g_str_equal);
594 i = gst_parse_launch_cmdline (newargc, argvn, parent, &priv);
596 // GST_DEBUG(0, "Finished - freeing temporary argument array");
597 // g_strfreev(argvn);