mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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51cbf22624
Original commit message from CVS: This is a megapatch with the following changes: - moved the gchar *name to GstObject, removed the ones in GstElement and GstPad. - moved the parent handling completely into GstObject. This cause *all* of the plugins to fail (except those that used gst_pad_get_parent) - rearanged the XML save handling. - GstObject now has a class function save/restore_thyself. - GstObject has a generic method gst_object_save_thyself, this makes it possible to fire a signal wehever a new object is loaded. This is needed so we can add XML save hooks. - GstXML API has changed slightly. You now have to create a GstXML object first before you can actually load something. This makes it possible to attach a signal to GstXML whenever an object is loaded. I'm not sure we will keep this interface. - GstObject can now print the path_string without knowing about the GstPad and GstElement types. - Added gst_bin_get_by_name_recurse_up to lookup an element in the current element hierarchy. - added XML namespaces to the saved pipelines the namespace is: http://gstreamer.net/gst-core/1.0/ namespaces are needed to distinguish user generated XML from the core XML. Note that the plugins still contain a macro GST_OBJECT_PARENT that will be replaced with gst_pad_get_parent shortly.
384 lines
12 KiB
C
384 lines
12 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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#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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typedef struct _gst_parse_priv gst_parse_priv;
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struct _gst_parse_priv {
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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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gchar *name;
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GstPad *peer;
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};
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/* FIXME need to either revive this, or have pad->padtemplate connections in core
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static void
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gst_parse_newpad(GstElement *element,GstPad *pad,launch_delayed_pad *peer)
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{
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gst_info("have NEW_PAD signal\n");
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// if it matches, connect it
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if (!strcmp(GST_PAD_NAME(pad),peer->name)) {
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gst_pad_connect(pad,peer->peer);
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gst_info("delayed connect of '%s' to '%s'\n",
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GST_PAD_NAME(pad),GST_PAD_NAME(peer->peer));
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}
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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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gint count;
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count = GPOINTER_TO_INT(g_hash_table_lookup(priv->elementcounts,type));
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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;
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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;
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GstPad *sinkpad = NULL, *srcpad = NULL;
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GList *pads;
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gint elementcount = 0;
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gint retval = 0;
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priv->binlevel++;
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if (GST_IS_PIPELINE(parent)) { closingchar = '\0';DEBUG("in pipeline "); }
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else if (GST_IS_THREAD(parent)) { closingchar = '}';DEBUG("in thread "); }
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else { closingchar = ')';DEBUG("in bin "); }
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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) { i++;continue; }
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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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} 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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} 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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} 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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GST_DEBUG(0,"have srcpad %s, sinkpad %s\n",srcpadname,sinkpadname);
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srcpad = NULL;
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// if the srcpadname doesn't have any commas in it, find an actual pad
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if (!srcpadname || !strchr(srcpadname,',')) {
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if (srcpadname != NULL) {
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srcpad = gst_element_get_pad(previous,srcpadname);
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if (!srcpad)
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GST_DEBUG(0,"NO SUCH pad %s in element %s\n",srcpadname,GST_ELEMENT_NAME(previous));
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}
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if (srcpad == NULL) {
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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),srcpadname);
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pads = gst_element_get_pad_list(previous);
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while (pads) {
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srcpad = GST_PAD(pads->data);
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GST_DEBUG(0,"have pad %s:%s\n",GST_DEBUG_PAD_NAME(srcpad));
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if (GST_IS_GHOST_PAD(srcpad)) GST_DEBUG(0,"it's a ghost pad\n");
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pads = g_list_next (pads);
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if (gst_pad_get_direction (srcpad) == GST_PAD_SRC) break;
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srcpad = NULL;
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}
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}
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if (!srcpad) GST_DEBUG(0,"error, can't find a src pad!!!\n");
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else GST_DEBUG(0,"have src pad %s:%s\n",GST_DEBUG_PAD_NAME(srcpad));
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}
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// argument with = in it
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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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DEBUG("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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gtk_object_set(GTK_OBJECT(previous),argname,argval,NULL);
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g_free(argname);
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// element or argument, or beginning of bin or thread
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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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// exit(-1);
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}
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GST_DEBUG(0,"CREATED bin %s\n",GST_ELEMENT_NAME(element));
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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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// exit(-1);
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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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i += gst_parse_launch_cmdline(argc - i, argv + i + 1, GST_BIN (element), priv);
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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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fprintf(stderr,"Couldn't create a '%s', no such element or need to run gstraemer-register?\n",arg);
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// exit(-1);
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}
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GST_DEBUG(0,"CREATED element %s\n",GST_ELEMENT_NAME(element));
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}
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gst_bin_add (GST_BIN (parent), element);
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elementcount++;
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if (srcpad != NULL) {
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DEBUG("need to connect to sinkpad %s:%s\n",GST_DEBUG_PAD_NAME(srcpad));
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sinkpad = NULL;
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if (sinkpadname != NULL)
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sinkpad = gst_element_get_pad(previous,sinkpadname);
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if (!sinkpad) {
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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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sinkpad = GST_PAD(pads->data);
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pads = g_list_next (pads);
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if (gst_pad_get_direction (sinkpad) == GST_PAD_SINK) break;
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sinkpad = NULL;
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}
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}
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if (!sinkpad) DEBUG("error, can't find a sink pad!!!\n");
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else DEBUG("have sink pad %s:%s\n",GST_DEBUG_PAD_NAME(sinkpad));
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GST_DEBUG(0,"CONNECTING %s:%s and %s:%s\n",GST_DEBUG_PAD_NAME(srcpad),GST_DEBUG_PAD_NAME(sinkpad));
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gst_pad_connect(srcpad,sinkpad);
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sinkpad = NULL;
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srcpad = NULL;
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}
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// if we're the first element, ghost all the sinkpads
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if (elementcount == 1) {
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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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sinkpad = GST_PAD (pads->data);
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pads = g_list_next (pads);
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if (!sinkpad) DEBUG("much oddness, pad doesn't seem to exist\n");
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else if (gst_pad_get_direction (sinkpad) == GST_PAD_SINK) {
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gst_element_add_ghost_pad (GST_ELEMENT (parent), sinkpad,
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g_strdup_printf("%s-ghost",GST_PAD_NAME(sinkpad)));
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GST_DEBUG(0,"GHOSTED %s:%s to %s as %s-ghost\n",
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GST_DEBUG_PAD_NAME(sinkpad),GST_ELEMENT_NAME(GST_ELEMENT(parent)),GST_PAD_NAME(sinkpad));
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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)) prevelement = element;
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}
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i++;
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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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srcpad = GST_PAD (pads->data);
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pads = g_list_next (pads);
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if (!srcpad) DEBUG("much oddness, pad doesn't seem to exist\n");
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else if (gst_pad_get_direction (srcpad) == GST_PAD_SRC) {
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gst_element_add_ghost_pad (GST_ELEMENT (parent), srcpad,
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g_strdup_printf("%s-ghost",GST_PAD_NAME(srcpad)));
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GST_DEBUG(0,"GHOSTED %s:%s to %s as %s-ghost\n",
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GST_DEBUG_PAD_NAME(srcpad),GST_ELEMENT_NAME (parent),GST_PAD_NAME(srcpad));
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}
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}
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}
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priv->binlevel--;
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if (retval) return retval;
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if (closingchar != '\0')
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DEBUG("returning IN THE WRONG PLACE\n");
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else DEBUG("ending pipeline\n");
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return i+1;
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}
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/**
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* gst_parse_launch:
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* @cmdline: the command line describing the pipeline
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* @parent: the parent bin for the resulting pipeline
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*
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* Create a new pipeline based on command line syntax.
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*
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* Returns: ?
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*/
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gint
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gst_parse_launch(const gchar *cmdline,GstBin *parent)
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{
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gst_parse_priv priv;
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gchar **argvn;
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gint newargc;
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gint len;
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int i,j,k;
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priv.bincount = 0;
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priv.threadcount = 0;
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priv.binlevel = 0;
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priv.elementcounts = NULL;
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priv.verbose = FALSE;
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priv.debug = FALSE;
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// first walk through quickly and see how many more slots we need
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len = strlen(cmdline);
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newargc = 1;
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for (i=0;i<len;i++) {
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// if it's a space, it denotes a new arg
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if (cmdline[i] == ' ') newargc++;
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// if it's a brace and isn't followed by a space, give it an arg
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if (strchr("([{}])",cmdline[i])) {
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// not followed by space, gets one
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if (cmdline[i+1] != ' ') newargc++;
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}
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}
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// now allocate the new argv array
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argvn = g_new0(char *,newargc+1);
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GST_DEBUG(0,"supposed to have %d args\n",newargc);
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// now attempt to construct the new arg list
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j = 0;k = 0;
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for (i=0;i<len+1;i++) {
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// if it's a delimiter
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if (strchr("([{}]) ",cmdline[i]) || (cmdline[i] == '\0')) {
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// extract the previous arg
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if (i-k > 0) {
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if (cmdline[k] == ' ') k++;
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argvn[j] = g_new0(char,(i-k)+1);
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memcpy(argvn[j],&cmdline[k],i-k);
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// catch misparses
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if (strlen(argvn[j]) > 0) j++;
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}
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k = i;
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// if this is a bracket, construct a word
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if ((cmdline[i] != ' ') && (cmdline[i] != '\0')) {
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argvn[j++] = g_strdup_printf("%c",cmdline[i]);
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k++;
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}
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}
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}
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// print them out
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for (i=0;i<newargc;i++) {
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GST_DEBUG(0,"arg %d is: %s\n",i,argvn[i]);
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}
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// set up the elementcounts hash
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priv.elementcounts = g_hash_table_new(g_str_hash,g_str_equal);
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return gst_parse_launch_cmdline(newargc,argvn,parent,&priv);
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}
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