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https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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619 lines
17 KiB
C
619 lines
17 KiB
C
/* GStreamer
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* Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
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* 2000 Wim Taymans <wtay@chello.be>
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*
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* :
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#define DEBUG(format,args...)
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#define DEBUG_NOPREFIX(format,args...)
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#define VERBOSE(format,args...)
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#define GST_PARSE_LISTPAD(list) ((GstPad*)(list->data))
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#include <string.h>
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#include "gst_private.h"
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#include "gstparse.h"
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#include "gstpipeline.h"
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#include "gstthread.h"
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#include "gstutils.h"
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typedef struct _gst_parse_priv gst_parse_priv;
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struct _gst_parse_priv
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{
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guint bincount;
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guint threadcount;
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gint binlevel;
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GHashTable *elementcounts;
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gboolean verbose;
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gboolean debug;
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};
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typedef struct _gst_parse_delayed_pad gst_parse_delayed_pad;
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struct _gst_parse_delayed_pad
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{
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gchar *name;
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GstPad *peer;
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};
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typedef struct
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{
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gchar *srcpadname;
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GstPad *target;
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GstElement *pipeline;
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}
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dyn_connect;
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static void
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dynamic_connect (GstElement * element, GstPad * newpad, gpointer data)
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{
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dyn_connect *connect = (dyn_connect *) data;
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if (!strcmp (gst_pad_get_name (newpad), connect->srcpadname)) {
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gst_element_set_state (connect->pipeline, GST_STATE_PAUSED);
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gst_pad_connect (newpad, connect->target);
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gst_element_set_state (connect->pipeline, GST_STATE_PLAYING);
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}
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}
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static gchar *
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gst_parse_unique_name (gchar * type, gst_parse_priv * priv)
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{
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gpointer tmp;
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gint count;
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tmp = g_hash_table_lookup (priv->elementcounts, type);
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count = GPOINTER_TO_INT (tmp);
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count++;
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g_hash_table_insert (priv->elementcounts, type, GINT_TO_POINTER (count));
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return g_strdup_printf ("%s%d", type, count - 1);
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}
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static gint
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gst_parse_launch_cmdline (int argc, char *argv[], GstBin * parent, gst_parse_priv * priv)
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{
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gint i = 0, j = 0;
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gchar *arg;
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GstElement *element = NULL, *previous = NULL, *prevelement = NULL;
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gchar closingchar = '\0';
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gint len;
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gchar *ptr;
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gchar *sinkpadname = NULL, *srcpadname = NULL, *tempname;
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GstPad *temppad;
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GSList *sinkpads = NULL, *srcpads = NULL;
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gint numsrcpads = 0, numsinkpads = 0;
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GList *pads;
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gint elementcount = 0;
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gint retval = 0;
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gboolean backref = FALSE;
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priv->binlevel++;
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if (GST_IS_PIPELINE (parent)) {
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closingchar = '\0';
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DEBUG ("in pipeline ");
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}
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else if (GST_IS_THREAD (parent)) {
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closingchar = '}';
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DEBUG ("in thread ");
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}
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else {
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closingchar = ')';
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DEBUG ("in bin ");
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}
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DEBUG_NOPREFIX ("%s\n", GST_ELEMENT_NAME (GST_ELEMENT (parent)));
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while (i < argc) {
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arg = argv[i];
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/* FIXME this is a lame solution for problems with the first parser */
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if (arg == NULL) {
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i++;
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continue;
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}
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len = strlen (arg);
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element = NULL;
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DEBUG ("** ARGUMENT is '%s'\n", arg);
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/* a null that slipped through the reconstruction */
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if (len == 0) {
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DEBUG ("random arg, FIXME\n");
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i++;
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continue;
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/* end of the container */
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}
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else if (arg[0] == closingchar) {
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/* time to finish off this bin */
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DEBUG ("exiting container %s\n", GST_ELEMENT_NAME (GST_ELEMENT (parent)));
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retval = i + 1;
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break;
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/* a pad connection */
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}
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else if ((ptr = strchr (arg, '!'))) {
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DEBUG ("attempting to connect pads together....\n");
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/* if it starts with the ! */
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if (arg[0] == '!') {
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srcpadname = NULL;
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/* if there's a sinkpad... */
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if (len > 1)
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sinkpadname = &arg[1];
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else
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sinkpadname = NULL;
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}
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else {
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srcpadname = g_strndup (arg, (ptr - arg));
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/* if there's a sinkpad */
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if (len > (ptr - arg) + 1)
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sinkpadname = &ptr[1];
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else
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sinkpadname = NULL;
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}
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if (srcpadname && (ptr = strchr (srcpadname, '.'))) {
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gchar *element_name = g_strndup (arg, (ptr - srcpadname));
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GstElement *new;
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GST_DEBUG (0, "have pad for element %s\n", element_name);
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new = gst_bin_get_by_name_recurse_up (parent, element_name);
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if (!new) {
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GST_DEBUG (0, "element %s does not exist! trying to continue\n", element_name);
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}
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else {
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previous = new;
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srcpadname = ptr + 1;
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backref = TRUE;
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}
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}
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GST_DEBUG (0, "have srcpad %s, sinkpad %s\n", srcpadname, sinkpadname);
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g_slist_free (srcpads);
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srcpads = NULL;
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numsrcpads = 0;
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tempname = NULL;
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/* find src pads */
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if (srcpadname != NULL) {
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while (1) {
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/* split name at commas */
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if ((ptr = strchr (srcpadname, ','))) {
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tempname = g_strndup (srcpadname, (ptr - srcpadname));
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srcpadname = &ptr[1];
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}
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else {
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tempname = srcpadname;
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}
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/* look for pad with that name */
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if ((temppad = gst_element_get_pad (previous, tempname))) {
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srcpads = g_slist_append (srcpads, temppad);
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numsrcpads++;
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}
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/* try to create a pad using that padtemplate name */
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else if ((temppad = gst_element_request_pad_by_name (previous, tempname))) {
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srcpads = g_slist_append (srcpads, temppad);
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numsrcpads++;
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}
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if (!temppad) {
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GST_DEBUG (0, "NO SUCH pad %s in element %s\n", tempname, GST_ELEMENT_NAME (previous));
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}
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else {
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GST_DEBUG (0, "have src pad %s:%s\n", GST_DEBUG_PAD_NAME (temppad));
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}
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/* if there is no more commas in srcpadname then we're done */
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if (tempname == srcpadname)
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break;
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g_free (tempname);
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}
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}
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else {
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/* check through the list to find the first sink pad */
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GST_DEBUG (0, "CHECKING through element %s for pad named %s\n", GST_ELEMENT_NAME (previous),
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srcpadname);
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pads = gst_element_get_pad_list (previous);
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while (pads) {
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temppad = GST_PARSE_LISTPAD (pads);
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GST_DEBUG (0, "have pad %s:%s\n", GST_DEBUG_PAD_NAME (temppad));
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if (GST_IS_GHOST_PAD (temppad))
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GST_DEBUG (0, "it's a ghost pad\n");
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if (gst_pad_get_direction (temppad) == GST_PAD_SRC) {
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srcpads = g_slist_append (srcpads, temppad);
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numsrcpads++;
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break;
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}
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pads = g_list_next (pads);
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}
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if (!srcpads)
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GST_DEBUG (0, "error, can't find a src pad!!!\n");
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else
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GST_DEBUG (0, "have src pad %s:%s\n", GST_DEBUG_PAD_NAME (GST_PARSE_LISTPAD (srcpads)));
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}
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/* argument with = in it */
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}
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else if (strstr (arg, "=")) {
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gchar *argname;
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gchar *argval;
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gchar *pos = strstr (arg, "=");
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/* we have an argument */
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argname = arg;
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pos[0] = '\0';
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argval = pos + 1;
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GST_DEBUG (0, "attempting to set argument '%s' to '%s' on element '%s'\n",
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argname, argval, GST_ELEMENT_NAME (previous));
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gst_util_set_object_arg (G_OBJECT (previous), argname, argval);
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g_free (argname);
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/* element or argument, or beginning of bin or thread */
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}
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else if (arg[0] == '[') {
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/* we have the start of a name of the preceding element. */
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/* rename previous element to next arg. */
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if (arg[1] != '\0') {
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fprintf (stderr, "error, unexpected junk after [\n");
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return GST_PARSE_ERROR_SYNTAX;
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}
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i++;
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if (i < argc) {
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gst_element_set_name (previous, argv[i]);
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}
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else {
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fprintf (stderr, "error, expected element name, found end of arguments\n");
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return GST_PARSE_ERROR_SYNTAX;
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}
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i++;
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if (i >= argc) {
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fprintf (stderr, "error, expected ], found end of arguments\n");
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return GST_PARSE_ERROR_SYNTAX;
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}
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else if (strcmp (argv[i], "]") != 0) {
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fprintf (stderr, "error, expected ], found '%s'\n", argv[i]);
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return GST_PARSE_ERROR_SYNTAX;
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}
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}
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else {
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DEBUG ("have element or bin/thread\n");
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/* if we have a bin or thread starting */
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if (strchr ("({", arg[0])) {
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if (arg[0] == '(') {
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/* create a bin and add it to the current parent */
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element = gst_bin_new (g_strdup_printf ("bin%d", priv->bincount++));
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if (!element) {
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fprintf (stderr, "Couldn't create a bin!\n");
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return GST_PARSE_ERROR_CREATING_ELEMENT;
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}
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GST_DEBUG (0, "CREATED bin %s\n", GST_ELEMENT_NAME (element));
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}
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else if (arg[0] == '{') {
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/* create a thread and add it to the current parent */
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element = gst_thread_new (g_strdup_printf ("thread%d", priv->threadcount++));
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if (!element) {
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fprintf (stderr, "Couldn't create a thread!\n");
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return GST_PARSE_ERROR_CREATING_ELEMENT;
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}
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GST_DEBUG (0, "CREATED thread %s\n", GST_ELEMENT_NAME (element));
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}
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else {
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DEBUG ("error in parser, unexpected symbol, FIXME\n");
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i++;
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continue;
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}
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gst_bin_add (GST_BIN (parent), element);
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j = gst_parse_launch_cmdline (argc - i, argv + i + 1, GST_BIN (element), priv);
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/* check for parse error */
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if (j < 0)
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return j;
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i += j;
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}
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else {
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/* we have an element */
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DEBUG ("attempting to create element '%s'\n", arg);
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ptr = gst_parse_unique_name (arg, priv);
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element = gst_elementfactory_make (arg, ptr);
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g_free (ptr);
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if (!element) {
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#ifndef GST_DISABLE_REGISTRY
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fprintf (stderr,
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"Couldn't create a '%s', no such element or need to run gst-register?\n",
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arg);
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#else
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fprintf (stderr, "Couldn't create a '%s', no such element or need to load pluginn?\n",
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arg);
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#endif
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return GST_PARSE_ERROR_NOSUCH_ELEMENT;
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}
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GST_DEBUG (0, "CREATED element %s\n", GST_ELEMENT_NAME (element));
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gst_bin_add (GST_BIN (parent), element);
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}
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elementcount++;
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g_slist_free (sinkpads);
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sinkpads = NULL;
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numsinkpads = 0;
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tempname = NULL;
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/* find sink pads */
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if (sinkpadname != NULL) {
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while (1) {
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/* split name at commas */
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if ((ptr = strchr (sinkpadname, ','))) {
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tempname = g_strndup (sinkpadname, (ptr - sinkpadname));
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sinkpadname = &ptr[1];
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}
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else {
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tempname = sinkpadname;
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}
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/* look for pad with that name */
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if ((temppad = gst_element_get_pad (element, tempname))) {
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sinkpads = g_slist_append (sinkpads, temppad);
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numsinkpads++;
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}
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/* try to create a pad using that padtemplate name */
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else if ((temppad = gst_element_request_pad_by_name (element, tempname))) {
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sinkpads = g_slist_append (sinkpads, temppad);
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numsinkpads++;
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}
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if (!temppad) {
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GST_DEBUG (0, "NO SUCH pad %s in element %s\n", tempname, GST_ELEMENT_NAME (element));
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}
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else {
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GST_DEBUG (0, "have sink pad %s:%s\n", GST_DEBUG_PAD_NAME (temppad));
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}
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/* if there is no more commas in sinkpadname then we're done */
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if (tempname == sinkpadname)
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break;
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g_free (tempname);
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}
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}
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else {
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/* check through the list to find the first sink pad */
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pads = gst_element_get_pad_list (element);
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while (pads) {
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temppad = GST_PAD (pads->data);
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pads = g_list_next (pads);
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if (gst_pad_get_direction (temppad) == GST_PAD_SINK) {
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sinkpads = g_slist_append (sinkpads, temppad);
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numsinkpads++;
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break;
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}
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}
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}
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if (!sinkpads)
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GST_DEBUG (0, "can't find a sink pad for element\n");
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else
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GST_DEBUG (0, "have sink pad %s:%s\n", GST_DEBUG_PAD_NAME (GST_PARSE_LISTPAD (sinkpads)));
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if (!srcpads && sinkpads && previous && srcpadname) {
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dyn_connect *connect = g_malloc (sizeof (dyn_connect));
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connect->srcpadname = srcpadname;
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connect->target = GST_PARSE_LISTPAD (sinkpads);
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connect->pipeline = GST_ELEMENT (parent);
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GST_DEBUG (0, "SETTING UP dynamic connection %s:%s and %s:%s\n",
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gst_element_get_name (previous),
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srcpadname, GST_DEBUG_PAD_NAME (GST_PARSE_LISTPAD (sinkpads)));
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g_signal_connect (G_OBJECT (previous), "new_pad", G_CALLBACK (dynamic_connect), connect);
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}
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else {
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for (j = 0; (j < numsrcpads) && (j < numsinkpads); j++) {
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GST_DEBUG (0, "CONNECTING %s:%s and %s:%s\n",
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GST_DEBUG_PAD_NAME (GST_PARSE_LISTPAD (g_slist_nth (srcpads, j))),
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GST_DEBUG_PAD_NAME (GST_PARSE_LISTPAD (g_slist_nth (sinkpads, j))));
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gst_pad_connect (GST_PARSE_LISTPAD (g_slist_nth (srcpads, j)),
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GST_PARSE_LISTPAD (g_slist_nth (sinkpads, j)));
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}
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}
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g_slist_free (srcpads);
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srcpads = NULL;
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g_slist_free (sinkpads);
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sinkpads = NULL;
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/* if we're the first element, ghost all the sinkpads */
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if (elementcount == 1 && !backref) {
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DEBUG ("first element, ghosting all of %s's sink pads to parent %s\n",
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GST_ELEMENT_NAME (element), GST_ELEMENT_NAME (GST_ELEMENT (parent)));
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pads = gst_element_get_pad_list (element);
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while (pads) {
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temppad = GST_PAD (pads->data);
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pads = g_list_next (pads);
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if (!temppad)
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DEBUG ("much oddness, pad doesn't seem to exist\n");
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else if (gst_pad_get_direction (temppad) == GST_PAD_SINK) {
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gst_element_add_ghost_pad (GST_ELEMENT (parent), temppad,
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g_strdup_printf ("%s-ghost", GST_PAD_NAME (temppad)));
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GST_DEBUG (0, "GHOSTED %s:%s to %s as %s-ghost\n",
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GST_DEBUG_PAD_NAME (temppad), GST_ELEMENT_NAME (GST_ELEMENT (parent)),
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GST_PAD_NAME (temppad));
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}
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}
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}
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previous = element;
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if (!GST_IS_BIN (element))
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prevelement = element;
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}
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i++;
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}
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|
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/* ghost all the src pads of the bin */
|
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if (prevelement != NULL) {
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DEBUG ("last element, ghosting all of %s's src pads to parent %s\n",
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GST_ELEMENT_NAME (prevelement), GST_ELEMENT_NAME (GST_ELEMENT (parent)));
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pads = gst_element_get_pad_list (prevelement);
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while (pads) {
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temppad = GST_PAD (pads->data);
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pads = g_list_next (pads);
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if (!temppad)
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DEBUG ("much oddness, pad doesn't seem to exist\n");
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else if (gst_pad_get_direction (temppad) == GST_PAD_SRC) {
|
|
gst_element_add_ghost_pad (GST_ELEMENT (parent), temppad,
|
|
g_strdup_printf ("%s-ghost", GST_PAD_NAME (temppad)));
|
|
GST_DEBUG (0, "GHOSTED %s:%s to %s as %s-ghost\n",
|
|
GST_DEBUG_PAD_NAME (temppad), GST_ELEMENT_NAME (parent), GST_PAD_NAME (temppad));
|
|
}
|
|
}
|
|
}
|
|
|
|
priv->binlevel--;
|
|
|
|
if (retval)
|
|
return retval;
|
|
|
|
DEBUG (closingchar != '\0' ? "returning IN THE WRONG PLACE\n" : "ending pipeline\n");
|
|
|
|
return i + 1;
|
|
}
|
|
|
|
/**
|
|
* gst_parse_launch:
|
|
* @cmdline: the command line describing the pipeline
|
|
* @parent: the parent bin for the resulting pipeline
|
|
*
|
|
* Create a new pipeline based on command line syntax.
|
|
*
|
|
* Returns: ?
|
|
*/
|
|
gint
|
|
gst_parse_launch (const gchar * cmdline, GstBin * parent)
|
|
{
|
|
gst_parse_priv priv;
|
|
gchar **argvn;
|
|
gint newargc;
|
|
gint i;
|
|
const gchar *cp, *start, *end;
|
|
gchar *temp;
|
|
GSList *string_list = NULL, *slist;
|
|
|
|
priv.bincount = 0;
|
|
priv.threadcount = 0;
|
|
priv.binlevel = 0;
|
|
priv.elementcounts = NULL;
|
|
priv.verbose = FALSE;
|
|
priv.debug = FALSE;
|
|
|
|
end = cmdline + strlen (cmdline);
|
|
newargc = 0;
|
|
|
|
temp = "";
|
|
|
|
/* Extract the arguments to a gslist in reverse order */
|
|
for (cp = cmdline; cp < end;) {
|
|
i = strcspn (cp, "([{}]) \"\\");
|
|
|
|
if (i > 0) {
|
|
temp = g_strconcat (temp, g_strndup (cp, i), NULL);
|
|
|
|
/* see if we have an escape char */
|
|
if (cp[i] != '\\') {
|
|
/* normal argument - copy and add to the list */
|
|
string_list = g_slist_prepend (string_list, temp);
|
|
newargc++;
|
|
temp = "";
|
|
}
|
|
else {
|
|
temp = g_strconcat (temp, g_strndup (&cp[++i], 1), NULL);
|
|
}
|
|
cp += i;
|
|
}
|
|
|
|
/* skip spaces */
|
|
while (cp < end && *cp == ' ') {
|
|
cp++;
|
|
}
|
|
|
|
/* handle quoted arguments */
|
|
if (*cp == '"') {
|
|
start = ++cp;
|
|
|
|
/* find matching quote */
|
|
while (cp < end && *cp != '"')
|
|
cp++;
|
|
|
|
/* make sure we got it */
|
|
if (cp == end) {
|
|
g_warning ("gst_parse_launch: Unbalanced quote in command line");
|
|
/* FIXME: The list leaks here */
|
|
return 0;
|
|
}
|
|
|
|
/* copy the string sans quotes */
|
|
string_list = g_slist_prepend (string_list, g_strndup (start, cp - start));
|
|
newargc++;
|
|
cp += 2; /* skip the quote aswell */
|
|
}
|
|
|
|
/* brackets exist in a separate argument slot */
|
|
if (*cp && strchr ("([{}])", *cp)) {
|
|
string_list = g_slist_prepend (string_list, g_strndup (cp, 1));
|
|
newargc++;
|
|
cp++;
|
|
}
|
|
}
|
|
|
|
/* now allocate the new argv array */
|
|
argvn = g_new0 (char *, newargc);
|
|
|
|
GST_DEBUG (0, "got %d args\n", newargc);
|
|
|
|
/* reverse the list and put the strings in the new array */
|
|
i = newargc;
|
|
|
|
for (slist = string_list; slist; slist = slist->next)
|
|
argvn[--i] = slist->data;
|
|
|
|
g_slist_free (string_list);
|
|
|
|
/* print them out */
|
|
for (i = 0; i < newargc; i++) {
|
|
GST_DEBUG (0, "arg %d is: %s\n", i, argvn[i]);
|
|
}
|
|
|
|
/* set up the elementcounts hash */
|
|
priv.elementcounts = g_hash_table_new (g_str_hash, g_str_equal);
|
|
|
|
/* do it! */
|
|
i = gst_parse_launch_cmdline (newargc, argvn, parent, &priv);
|
|
|
|
/* GST_DEBUG(0, "Finished - freeing temporary argument array"); */
|
|
/* g_strfreev(argvn); */
|
|
|
|
return i;
|
|
}
|