mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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turned -launch capabilities into gst_parse_launch()
Original commit message from CVS: turned -launch capabilities into gst_parse_launch()
This commit is contained in:
Erik Walthinsen
parent
6ae2ad5edb
commit
ee2d89cb57
4 changed files with 396 additions and 0 deletions
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@ -39,6 +39,7 @@ libgst_la_SOURCES = \
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gsttype.c \
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gsttype.c \
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gstutils.c \
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gstutils.c \
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gstxml.c \
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gstxml.c \
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gstparse.c \
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$(GSTARCH_SRCS)
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$(GSTARCH_SRCS)
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# the compiler shoots cothreads.c in the head at -O6
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# the compiler shoots cothreads.c in the head at -O6
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@ -74,6 +75,7 @@ libgstinclude_HEADERS = \
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gsttrace.h \
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gsttrace.h \
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gsttype.h \
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gsttype.h \
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gstutils.h \
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gstutils.h \
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gstparse.h \
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gstxml.h
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gstxml.h
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@ -46,6 +46,8 @@
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#include <gst/gsttee.h>
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#include <gst/gsttee.h>
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#include <gst/cothreads.h>
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#include <gst/cothreads.h>
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#include <gst/gstparse.h>
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/* initialize GST */
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/* initialize GST */
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void gst_init(int *argc,char **argv[]);
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void gst_init(int *argc,char **argv[]);
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362
gst/gstparse.c
Normal file
362
gst/gstparse.c
Normal file
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@ -0,0 +1,362 @@
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/* 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 "gstparse.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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/*
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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_get_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_get_name(pad),gst_pad_get_name(peer->peer));
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}
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}
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*/
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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_get_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_get_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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DEBUG("have sinkpad %s, srcpad %s\n",sinkpadname,srcpadname);
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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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VERBOSE("NO SUCH pad %s in element %s\n",srcpadname,gst_element_get_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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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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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) DEBUG("error, can't find a src pad!!!\n");
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else DEBUG("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_get_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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VERBOSE("CREATED bin %s\n",gst_element_get_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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VERBOSE("CREATED thread %s\n",gst_element_get_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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element = gst_elementfactory_make(arg,gst_parse_unique_name(arg,priv));
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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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VERBOSE("CREATED element %s\n",gst_element_get_name(element));
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DEBUG("created element %s\n",gst_element_get_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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VERBOSE("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_get_name(element),gst_element_get_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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DEBUG("ghosted %s:%s\n",GST_DEBUG_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_get_name(prevelement),gst_element_get_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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DEBUG("ghosted %s:%s\n",GST_DEBUG_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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gint gst_parse_launch(const gchar *cmdline,GstBin *parent) {
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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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DEBUG("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++;
|
||||||
|
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++) {
|
||||||
|
DEBUG("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);
|
||||||
|
}
|
||||||
30
gst/gstparse.h
Normal file
30
gst/gstparse.h
Normal file
|
|
@ -0,0 +1,30 @@
|
||||||
|
/* GStreamer
|
||||||
|
* Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
|
||||||
|
* 2000 Wim Taymans <wtay@chello.be>
|
||||||
|
*
|
||||||
|
* filename:
|
||||||
|
*
|
||||||
|
* 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.
|
||||||
|
*/
|
||||||
|
|
||||||
|
#ifndef __GST_PARSE_H__
|
||||||
|
#define __GST_PARSE_H__
|
||||||
|
|
||||||
|
#include "gst.h"
|
||||||
|
|
||||||
|
gint gst_parse_launch(const gchar *cmdline,GstBin *parent);
|
||||||
|
|
||||||
|
#endif __GST_PARSE_H__
|
||||||
Loading…
Reference in a new issue