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gstreamer/gst/gstparse.c
Wim Taymans 2fd9de4142 Added a utility function in gstutils to set an object argument as a string. gstparse.c and gstelement.c now use this ... 
Original commit message from CVS:
Added a utility function in gstutils to set an object argument as a
string. gstparse.c and gstelement.c now use this function.
2001-03-03 16:30:10 +00:00

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/* GStreamer
* Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
* 2000 Wim Taymans <wtay@chello.be>
*
* :
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#define DEBUG(format,args...)
#define DEBUG_NOPREFIX(format,args...)
#define VERBOSE(format,args...)
#include <string.h>
#include "gst_private.h"
#include "gstparse.h"
#include "gstpipeline.h"
#include "gstthread.h"
#include "gstutils.h"
typedef struct _gst_parse_priv gst_parse_priv;
struct _gst_parse_priv {
guint bincount;
guint threadcount;
gint binlevel;
GHashTable *elementcounts;
gboolean verbose;
gboolean debug;
};
typedef struct _gst_parse_delayed_pad gst_parse_delayed_pad;
struct _gst_parse_delayed_pad {
gchar *name;
GstPad *peer;
};
/* FIXME need to either revive this, or have pad->padtemplate connections in core
static void
gst_parse_newpad(GstElement *element,GstPad *pad,launch_delayed_pad *peer)
{
gst_info("have NEW_PAD signal\n");
// if it matches, connect it
if (!strcmp(GST_PAD_NAME(pad),peer->name)) {
gst_pad_connect(pad,peer->peer);
gst_info("delayed connect of '%s' to '%s'\n",
GST_PAD_NAME(pad),GST_PAD_NAME(peer->peer));
}
}
*/
static gchar *
gst_parse_unique_name(gchar *type,gst_parse_priv *priv)
{
gint count;
count = GPOINTER_TO_INT(g_hash_table_lookup(priv->elementcounts,type));
count++;
g_hash_table_insert(priv->elementcounts,type,GINT_TO_POINTER(count));
return g_strdup_printf("%s%d",type,count-1);
}
static gint
gst_parse_launch_cmdline(int argc,char *argv[],GstBin *parent,gst_parse_priv *priv)
{
gint i = 0;
gchar *arg;
GstElement *element = NULL, *previous = NULL, *prevelement = NULL;
gchar closingchar = '\0';
gint len;
gchar *ptr;
gchar *sinkpadname = NULL, *srcpadname = NULL;
GstPad *sinkpad = NULL, *srcpad = NULL;
GList *pads;
gint elementcount = 0;
gint retval = 0;
priv->binlevel++;
if (GST_IS_PIPELINE(parent)) { closingchar = '\0';DEBUG("in pipeline "); }
else if (GST_IS_THREAD(parent)) { closingchar = '}';DEBUG("in thread "); }
else { closingchar = ')';DEBUG("in bin "); }
DEBUG_NOPREFIX("%s\n",GST_ELEMENT_NAME (GST_ELEMENT (parent)));
while (i < argc) {
arg = argv[i];
// FIXME this is a lame solution for problems with the first parser
if (arg == NULL) { i++;continue; }
len = strlen(arg);
element = NULL;
DEBUG("** ARGUMENT is '%s'\n",arg);
// a null that slipped through the reconstruction
if (len == 0) {
DEBUG("random arg, FIXME\n");
i++;
continue;
// end of the container
} else if (arg[0] == closingchar) {
// time to finish off this bin
DEBUG("exiting container %s\n",GST_ELEMENT_NAME (GST_ELEMENT (parent)));
retval = i+1;
break;
// a pad connection
} else if ((ptr = strchr(arg,'!'))) {
DEBUG("attempting to connect pads together....\n");
// if it starts with the !
if (arg[0] == '!') {
srcpadname = NULL;
// if there's a sinkpad...
if (len > 1)
sinkpadname = &arg[1];
else
sinkpadname = NULL;
} else {
srcpadname = g_strndup(arg,(ptr-arg));
// if there's a sinkpad
if (len > (ptr-arg)+1)
sinkpadname = &ptr[1];
else
sinkpadname = NULL;
}
GST_DEBUG(0,"have srcpad %s, sinkpad %s\n",srcpadname,sinkpadname);
srcpad = NULL;
// if the srcpadname doesn't have any commas in it, find an actual pad
if (!srcpadname || !strchr(srcpadname,',')) {
if (srcpadname != NULL) {
srcpad = gst_element_get_pad(previous,srcpadname);
if (!srcpad)
GST_DEBUG(0,"NO SUCH pad %s in element %s\n",srcpadname,GST_ELEMENT_NAME(previous));
}
if (srcpad == NULL) {
// check through the list to find the first sink pad
GST_DEBUG(0,"CHECKING through element %s for pad named %s\n",GST_ELEMENT_NAME(previous),srcpadname);
pads = gst_element_get_pad_list(previous);
while (pads) {
srcpad = GST_PAD(pads->data);
GST_DEBUG(0,"have pad %s:%s\n",GST_DEBUG_PAD_NAME(srcpad));
if (GST_IS_GHOST_PAD(srcpad)) GST_DEBUG(0,"it's a ghost pad\n");
pads = g_list_next (pads);
if (gst_pad_get_direction (srcpad) == GST_PAD_SRC) break;
srcpad = NULL;
}
}
if (!srcpad) GST_DEBUG(0,"error, can't find a src pad!!!\n");
else GST_DEBUG(0,"have src pad %s:%s\n",GST_DEBUG_PAD_NAME(srcpad));
}
// argument with = in it
} else if (strstr(arg, "=")) {
gchar * argname;
gchar * argval;
gchar * pos = strstr(arg, "=");
// we have an argument
argname = arg;
pos[0] = '\0';
argval = pos+1;
DEBUG("attempting to set argument '%s' to '%s' on element '%s'\n",
argname,argval,GST_ELEMENT_NAME(previous));
//gtk_object_set(GTK_OBJECT(previous),argname,argval,NULL);
gst_util_set_object_arg (GTK_OBJECT(previous), argname, argval);
g_free(argname);
// element or argument, or beginning of bin or thread
} else {
DEBUG("have element or bin/thread\n");
// if we have a bin or thread starting
if (strchr("({",arg[0])) {
if (arg[0] == '(') {
// create a bin and add it to the current parent
element = gst_bin_new(g_strdup_printf("bin%d",priv->bincount++));
if (!element) {
fprintf(stderr,"Couldn't create a bin!\n");
// exit(-1);
}
GST_DEBUG(0,"CREATED bin %s\n",GST_ELEMENT_NAME(element));
} else if (arg[0] == '{') {
// create a thread and add it to the current parent
element = gst_thread_new(g_strdup_printf("thread%d",priv->threadcount++));
if (!element) {
fprintf(stderr,"Couldn't create a thread!\n");
// exit(-1);
}
GST_DEBUG(0,"CREATED thread %s\n",GST_ELEMENT_NAME(element));
}
i += gst_parse_launch_cmdline(argc - i, argv + i + 1, GST_BIN (element), priv);
} else {
// we have an element
DEBUG("attempting to create element '%s'\n",arg);
ptr = gst_parse_unique_name(arg,priv);
element = gst_elementfactory_make(arg,ptr);
g_free(ptr);
if (!element) {
fprintf(stderr,"Couldn't create a '%s', no such element or need to run gstraemer-register?\n",arg);
// exit(-1);
}
GST_DEBUG(0,"CREATED element %s\n",GST_ELEMENT_NAME(element));
}
gst_bin_add (GST_BIN (parent), element);
elementcount++;
if (srcpad != NULL) {
DEBUG("need to connect to sinkpad %s:%s\n",GST_DEBUG_PAD_NAME(srcpad));
sinkpad = NULL;
if (sinkpadname != NULL)
sinkpad = gst_element_get_pad(previous,sinkpadname);
if (!sinkpad) {
// check through the list to find the first sink pad
pads = gst_element_get_pad_list(element);
while (pads) {
sinkpad = GST_PAD(pads->data);
pads = g_list_next (pads);
if (gst_pad_get_direction (sinkpad) == GST_PAD_SINK) break;
sinkpad = NULL;
}
}
if (!sinkpad) DEBUG("error, can't find a sink pad!!!\n");
else DEBUG("have sink pad %s:%s\n",GST_DEBUG_PAD_NAME(sinkpad));
GST_DEBUG(0,"CONNECTING %s:%s and %s:%s\n",GST_DEBUG_PAD_NAME(srcpad),GST_DEBUG_PAD_NAME(sinkpad));
gst_pad_connect(srcpad,sinkpad);
sinkpad = NULL;
srcpad = NULL;
}
// if we're the first element, ghost all the sinkpads
if (elementcount == 1) {
DEBUG("first element, ghosting all of %s's sink pads to parent %s\n",
GST_ELEMENT_NAME(element),GST_ELEMENT_NAME(GST_ELEMENT(parent)));
pads = gst_element_get_pad_list (element);
while (pads) {
sinkpad = GST_PAD (pads->data);
pads = g_list_next (pads);
if (!sinkpad) DEBUG("much oddness, pad doesn't seem to exist\n");
else if (gst_pad_get_direction (sinkpad) == GST_PAD_SINK) {
gst_element_add_ghost_pad (GST_ELEMENT (parent), sinkpad,
g_strdup_printf("%s-ghost",GST_PAD_NAME(sinkpad)));
GST_DEBUG(0,"GHOSTED %s:%s to %s as %s-ghost\n",
GST_DEBUG_PAD_NAME(sinkpad),GST_ELEMENT_NAME(GST_ELEMENT(parent)),GST_PAD_NAME(sinkpad));
}
}
}
previous = element;
if (!GST_IS_BIN(element)) prevelement = element;
}
i++;
}
// ghost all the src pads of the bin
if (prevelement != NULL) {
DEBUG("last element, ghosting all of %s's src pads to parent %s\n",
GST_ELEMENT_NAME(prevelement),GST_ELEMENT_NAME(GST_ELEMENT(parent)));
pads = gst_element_get_pad_list (prevelement);
while (pads) {
srcpad = GST_PAD (pads->data);
pads = g_list_next (pads);
if (!srcpad) DEBUG("much oddness, pad doesn't seem to exist\n");
else if (gst_pad_get_direction (srcpad) == GST_PAD_SRC) {
gst_element_add_ghost_pad (GST_ELEMENT (parent), srcpad,
g_strdup_printf("%s-ghost",GST_PAD_NAME(srcpad)));
GST_DEBUG(0,"GHOSTED %s:%s to %s as %s-ghost\n",
GST_DEBUG_PAD_NAME(srcpad),GST_ELEMENT_NAME (parent),GST_PAD_NAME(srcpad));
}
}
}
priv->binlevel--;
if (retval) return retval;
if (closingchar != '\0')
DEBUG("returning IN THE WRONG PLACE\n");
else DEBUG("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 len;
int i,j,k;
priv.bincount = 0;
priv.threadcount = 0;
priv.binlevel = 0;
priv.elementcounts = NULL;
priv.verbose = FALSE;
priv.debug = FALSE;
// first walk through quickly and see how many more slots we need
len = strlen(cmdline);
newargc = 1;
for (i=0;i<len;i++) {
// if it's a space, it denotes a new arg
if (cmdline[i] == ' ') newargc++;
// if it's a brace and isn't followed by a space, give it an arg
if (strchr("([{}])",cmdline[i])) {
// not followed by space, gets one
if (cmdline[i+1] != ' ') newargc++;
}
}
// now allocate the new argv array
argvn = g_new0(char *,newargc+1);
GST_DEBUG(0,"supposed to have %d args\n",newargc);
// now attempt to construct the new arg list
j = 0;k = 0;
for (i=0;i<len+1;i++) {
// if it's a delimiter
if (strchr("([{}]) ",cmdline[i]) || (cmdline[i] == '\0')) {
// extract the previous arg
if (i-k > 0) {
if (cmdline[k] == ' ') k++;
argvn[j] = g_new0(char,(i-k)+1);
memcpy(argvn[j],&cmdline[k],i-k);
// catch misparses
if (strlen(argvn[j]) > 0) j++;
}
k = i;
// if this is a bracket, construct a word
if ((cmdline[i] != ' ') && (cmdline[i] != '\0')) {
argvn[j++] = g_strdup_printf("%c",cmdline[i]);
k++;
}
}
}
// 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);
return gst_parse_launch_cmdline(newargc,argvn,parent,&priv);
}
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