Manual updates. fixes to gstxml.c gst_xml_get_element was broken

Original commit message from CVS:
Manual updates.
fixes to gstxml.c gst_xml_get_element was broken

docs/manual/components.sgml

@@ -1,11 +1,14 @@
 <chapter id="cha-components">
   <title>Components</title>
   <para> 
+    <application>GStreamer</application> includes components that people can include
+    in their programs.
   </para>
 
   <sect1>
     <title>GstPlay</title>
     <para> 
+      GstPlay is a GtkWidget with a simple API to play, pause and stop a media file.
     </para>
       
   </sect1>
@@ -13,6 +16,7 @@
   <sect1>
     <title>GstMediaPlay</title>
     <para> 
+      GstMediaply is a complete player widget.
     </para>
       
   </sect1>
@@ -20,6 +24,8 @@
   <sect1>
     <title>GstEditor</title>
     <para> 
+      GstEditor is a set of widgets to display a graphical representation of a 
+      pipeline.
     </para> 
   </sect1>
 

docs/manual/queues.sgml

@@ -8,13 +8,13 @@
   <para> 
     A buffer that is sinked to a Queue will not automatically be pushed to the
     next connected element but will be buffered. It will be pushed to the next
-    element as soon as gst_connection_push () is called.
+    element as soon as a gst_pad_pull () is called on the queues srcpad.
   </para>
   <para> 
     Queues are mostly used in conjunction with a <classname>GstThread</classname> to
     provide an external connection for the thread elements. You could have one
     thread feeding buffers into a <classname>GstQueue</classname> and another
-    thread repeadedly calling gst_connection_push () on the queue to feed its 
+    thread repeadedly calling gst_pad_pull () on the queue to feed its 
     internal elements.
   </para>
 
@@ -27,6 +27,110 @@
     <graphic fileref="images/queue" format="png"></graphic>
   </figure>
 
+  <para> 
+    The standard <application>GStreamer</application> queue implementation has some
+    properties that can be changed using the gtk_objet_set () method. To set the 
+    maximum number of buffers that can be queued to 30, do:
+  </para>
+  <programlisting>
+  gtk_object_set (GTK_OBJECT (queue), "max_level", 30, NULL);
+  </programlisting>
+
+  <para> 
+    The following mp3 player shows you how to create the above pipeline using a
+    thread and a queue.
+  </para>
+
+  <programlisting>
+#include &lt;stdlib.h&gt;
+#include &lt;gst/gst.h&gt;
+
+gboolean playing;
+
+/* eos will be called when the src element has an end of stream */
+void 
+eos (GstElement *element, gpointer data) 
+{
+  g_print ("have eos, quitting\n");
+
+  playing = FALSE;
+}
+
+int 
+main (int argc, char *argv[]) 
+{
+  GstElement *disksrc, *audiosink, *queue, *parse, *decode;
+  GstElement *bin;
+  GstElement *thread;
+
+  gst_init (&amp;argc,&amp;argv);
+
+  if (argc != 2) {
+    g_print ("usage: %s &lt;filename&gt;\n", argv[0]);
+    exit (-1);
+  }
+
+  /* create a new thread to hold the elements */
+  thread = gst_thread_new ("thread");
+  g_assert (thread != NULL);
+
+  /* create a new bin to hold the elements */
+  bin = gst_bin_new ("bin");
+  g_assert (bin != NULL);
+
+  /* create a disk reader */
+  disksrc = gst_elementfactory_make ("disksrc", "disk_source");
+  g_assert (disksrc != NULL);
+  gtk_object_set (GTK_OBJECT (disksrc), "location", argv[1], NULL);
+  gtk_signal_connect (GTK_OBJECT (disksrc), "eos",
+                      GTK_SIGNAL_FUNC (eos), thread);
+
+  queue = gst_elementfactory_make ("queue", "queue");
+
+  /* and an audio sink */
+  audiosink = gst_elementfactory_make ("audiosink", "play_audio");
+  g_assert (audiosink != NULL);
+
+  parse = gst_elementfactory_make ("mp3parse", "parse");
+  decode = gst_elementfactory_make ("mpg123", "decode");
+
+  /* add objects to the main bin */
+  gst_bin_add (GST_BIN (bin), disksrc);
+  gst_bin_add (GST_BIN (bin), queue);
+
+  gst_bin_add (GST_BIN (thread), parse);
+  gst_bin_add (GST_BIN (thread), decode);
+  gst_bin_add (GST_BIN (thread), audiosink);
+  
+  gst_pad_connect (gst_element_get_pad (disksrc,"src"),
+                   gst_element_get_pad (queue,"sink"));
+
+  gst_pad_connect (gst_element_get_pad (queue, "src"),
+                   gst_element_get_pad (parse, "sink"));
+  gst_pad_connect (gst_element_get_pad (parse, "src"),
+                   gst_element_get_pad (decode, "sink"));
+  gst_pad_connect (gst_element_get_pad (decode, "src"),
+                   gst_element_get_pad (audiosink, "sink"));
+
+  gst_bin_add (GST_BIN (bin), thread);
+
+  /* make it ready */
+  gst_element_set_state (GST_ELEMENT (bin), GST_STATE_READY);
+  /* start playing */
+  gst_element_set_state (GST_ELEMENT (bin), GST_STATE_PLAYING);
+
+  playing = TRUE;
+
+  while (playing) {
+    gst_bin_iterate (GST_BIN (bin));
+  }
+
+  gst_element_set_state (GST_ELEMENT (bin), GST_STATE_NULL);
+
+  exit (0);
+}
+  </programlisting>
+
 
 
 </chapter>

docs/manual/quotes.sgml

@@ -44,6 +44,38 @@
 	</para>
       </listitem>
     </varlistentry>
+    <varlistentry>
+      <term>5/6 Jan 2001</term>
+      <listitem>
+        <para>
+        <emphasis>wtay:</emphasis>
+	we need to cut down the time to create an mp3 player down to
+	seconds...
+	</para>
+        <para>
+        <emphasis>richardb:</emphasis>
+	:)
+	</para>
+        <para>
+        <emphasis>Omega:</emphasis>
+	I'm wanting to something more interesting soon, I did the "draw an mp3 
+	player in 15sec" back in October '99.
+	</para>
+        <para>
+        <emphasis>wtay:</emphasis>
+	by the time Omega gets his hands on the editor, you'll see a
+	complete audio mixer in the editor :-)
+	</para>
+        <para>
+        <emphasis>richardb:</emphasis>
+	Well, it clearly has the potential...
+	</para>
+        <para>
+        <emphasis>Omega:</emphasis>
+	Working on it... ;-)
+	</para>
+      </listitem>
+    </varlistentry>
     <varlistentry>
       <term>28 Dec 2000</term>
       <listitem>

docs/manual/states.sgml

@@ -41,6 +41,55 @@
         <graphic fileref="images/state-diagram" format="png"></graphic>
       </figure>
     </para>
+    <para> 
+      The state of an element can be changed with the following code:
+    </para>
+    <programlisting>
+  GstElement *bin;
+
+  // create a bin, put elements in it and connect them
+  ...
+  gst_element_set_state (bin, GST_STATE_PLAYING);
+  ...
+    </programlisting>
+
+    <para> 
+      You can set the following states to an element:
+    </para>
+    <informaltable pgwide=1 frame="none" role="enum">
+    <tgroup cols="2">
+      <colspec colwidth="2*">
+      <colspec colwidth="8*">
+    <tbody>
+      <row>
+        <entry><literal>GST_STATE_NONE_PENDING</literal></entry>
+        <entry>The element is in the desired state.
+        </entry>
+      </row>
+      <row>
+        <entry><literal>GST_STATE_NULL</literal></entry>
+        <entry>Reset the state of an element.
+        </entry>
+      </row>
+      <row>
+        <entry><literal>GST_STATE_READY</literal></entry>
+        <entry>will make the element ready to start processing data.
+        </entry>
+      </row>
+      <row>
+        <entry><literal>GST_STATE_PLAYING</literal></entry>
+        <entry>means there really is data flowing through the graph.
+        </entry>
+      </row>
+      <row>
+        <entry><literal>GST_STATE_PAUSED</literal></entry>
+        <entry>temporary stops the data flow.
+        </entry>
+      </row>
+    </tbody>
+    </tgroup>
+    </informaltable>
+
   </sect1>
 
   <sect1 id="sec-states-null">

docs/manual/xml.sgml

@@ -1,6 +1,178 @@
 <chapter id="cha-xml">
-  <title>XML in GStreamer</title>
+  <title>XML in <application>GStreamer</application></title>
   <para> 
+    <application>GStreamer</application> uses XML to store and load
+    its pipeline definitions. XML is also used internally to manage the
+    plugin registry. The plugin registry is a file that contains the definition
+    of all the plugins <application>GStreamer</application> knows about to have 
+    quick access to the specifics of the plugins.
   </para>
 
+  <para>
+    We will show you how you can save a pipeline to XML and how you can reload that
+    XML file again for later use. 
+  </para>
+  
+  <sect1 id="sec-xml-write">
+    <title>Turning GstElements into XML</title>
+
+    <para>
+      We create a simple pipeline and save it to disk with gst_xml_write (). The following
+      code constructs an mp3 player pipeline with two threads and finaly writes it to disk.
+      use this program with one argument: the mp3 file on disk.
+    </para>
+
+    <programlisting>
+#include &lt;stdlib.h&gt;
+#include &lt;gst/gst.h&gt;
+
+gboolean playing;
+
+int 
+main (int argc, char *argv[]) 
+{
+  GstElement *disksrc, *audiosink, *queue, *queue2, *parse, *decode;
+  GstElement *bin;
+  GstElement *thread, *thread2;
+
+  gst_init (&amp;argc,&amp;argv);
+
+  if (argc != 2) {
+    g_print ("usage: %s &lt;filename&gt;\n", argv[0]);
+    exit (-1);
+  }
+
+  /* create a new thread to hold the elements */
+  thread = gst_elementfactory_make ("thread", "thread");
+  g_assert (thread != NULL);
+  thread2 = gst_elementfactory_make ("thread", "thread2");
+  g_assert (thread2 != NULL);
+
+  /* create a new bin to hold the elements */
+  bin = gst_bin_new ("bin");
+  g_assert (bin != NULL);
+
+  /* create a disk reader */
+  disksrc = gst_elementfactory_make ("disksrc", "disk_source");
+  g_assert (disksrc != NULL);
+  gtk_object_set (GTK_OBJECT (disksrc), "location", argv[1], NULL);
+
+  queue = gst_elementfactory_make ("queue", "queue");
+  queue2 = gst_elementfactory_make ("queue", "queue2");
+
+  /* and an audio sink */
+  audiosink = gst_elementfactory_make ("audiosink", "play_audio");
+  g_assert (audiosink != NULL);
+
+  parse = gst_elementfactory_make ("mp3parse", "parse");
+  decode = gst_elementfactory_make ("mpg123", "decode");
+
+  /* add objects to the main bin */
+  gst_bin_add (GST_BIN (bin), disksrc);
+  gst_bin_add (GST_BIN (bin), queue);
+
+  gst_bin_add (GST_BIN (thread), parse);
+  gst_bin_add (GST_BIN (thread), decode);
+  gst_bin_add (GST_BIN (thread), queue2);
+
+  gst_bin_add (GST_BIN (thread2), audiosink);
+  
+  gst_pad_connect (gst_element_get_pad (disksrc,"src"),
+                   gst_element_get_pad (queue,"sink"));
+
+  gst_pad_connect (gst_element_get_pad (queue,"src"),
+                   gst_element_get_pad (parse,"sink"));
+  gst_pad_connect (gst_element_get_pad (parse,"src"),
+                   gst_element_get_pad (decode,"sink"));
+  gst_pad_connect (gst_element_get_pad (decode,"src"),
+                   gst_element_get_pad (queue2,"sink"));
+
+  gst_pad_connect (gst_element_get_pad (queue2,"src"),
+                   gst_element_get_pad (audiosink,"sink"));
+
+  gst_bin_add (GST_BIN (bin), thread);
+  gst_bin_add (GST_BIN (bin), thread2);
+
+  // write the bin to disk
+  xmlSaveFile ("xmlTest.gst", gst_xml_write (GST_ELEMENT (bin)));
+
+  exit (0);
+}
+    </programlisting>
+    <para>
+      The most important line is:
+    </para>
+    <programlisting>
+  xmlSaveFile ("xmlTest.gst", gst_xml_write (GST_ELEMENT (bin)));
+    </programlisting>
+    <para>
+      gst_xml_write () will turn the given element into and xmlDocPtr that 
+      can be saved with the xmlSaveFile () function found in the gnome-xml 
+      package. The result is an XML file named xmlTest.gst.
+    </para>
+    <para>
+      The complete element hierarchy will be saved along with the inter element
+      pad connections and the element parameters. Future <application>GStreamer</application>
+      versions will also allow you to store the signals in the XML file.
+    </para>
+  </sect1>
+
+  <sect1 id="sec-xml-load">
+    <title>Loading a GstElement from an XML file</title>
+    <para>
+      A saved XML file can be loade with the gst_xml_new (filename, rootelement).
+      The root element can optionally left NULL. The following code example loads
+      the previously created XML file and runs it.
+    </para>
+    <programlisting>
+#include &lt;stdlib.h&gt;
+#include &lt;gst/gst.h&gt;
+
+gboolean playing;
+
+/* eos will be called when the src element has an end of stream */
+void 
+eos (GstElement *element, gpointer data)
+{
+  g_print ("have eos, quitting\n");
+
+  playing = FALSE;
+}
+
+int 
+main(int argc, char *argv[]) 
+{
+  GstXML *xml;
+  GstElement *bin;
+  GstElement *disk;
+
+  gst_init (&amp;argc, &amp;argv);
+
+  xml = gst_xml_new ("xmlTest.gst", NULL);
+
+  bin = gst_xml_get_element (xml, "bin");
+  
+  gst_element_set_state (bin, GST_STATE_PLAYING);
+
+  playing = TRUE;
+
+  while (playing) {
+    gst_bin_iterate (GST_BIN (bin));
+  }
+
+  gst_element_set_state (bin, GST_STATE_NULL);
+
+  exit (0);
+}
+    </programlisting>
+    <para>
+      gst_xml_get_element (xml, "name") can be used to get a specific element 
+      from the XML file. 
+    </para>
+    <para>
+      gst_xml_get_topelements (xml) can be used to get a list of all toplevel elements
+      in the XML file.
+    </para>
+  </sect1>
+
 </chapter>

docs/plugins/Makefile.am

@@ -15,7 +15,7 @@ LDADD = $(GLIB_LIBS) $(GTK_LIBS) $(top_srcdir)/gst/libgst.la
 CFLAGS = `gstreamer-config --cflags` -Wall -g
 LDFLAGS = `gstreamer-config --libs` 
 
-EXTRA_DIST=$(DOC_MODULE).types.in
+EXTRA_DIST=$(DOC_MODULE).types.in $(DOC_MODULE)-sections.txt $(DOC_MAIN_SGML_FILE) gstdoc-mkdb gstdoc-mktmpl gstdoc-scanobj
 
 HTML_DIR=$(datadir)/$(DOC_MODULE)/html
 

docs/plugins/gstdoc-scanobj

@@ -835,7 +835,8 @@ output_widget_pads (FILE *fp, GstElement *element)
     GstPad *pad = (GstPad *)pads->data;
     GstType *type;
 
-    type = gst_type_find_by_id(pad->type);
+    //type = gst_type_find_by_id(pad->type);
+    type = gst_type_find_by_id(1);
 
     fprintf (fp, "<PAD>\n<NAME>%s::%s</NAME>\n",
 	       gtk_type_name(factory->type), pad->name);

docs/random/testing/syntax

@@ -21,6 +21,7 @@ tcS: id1, element, signalname (attach to signal in an element)
 tcS: id2, element, signalname
 ...
 tcI: the number of iterations on the top bin 
+tcT: a timeout value in mSecs
 tcR: id1,1,id2,1,.. (the pattern of signals trigered)
 or 
 tcR: id1==id2,... (denote an equal number of signals)

examples/xml/runxml.c

@@ -23,7 +23,6 @@ int main(int argc,char *argv[])
 
   bin = gst_xml_get_element(xml, "bin");
   
-  gst_element_set_state(bin, GST_STATE_READY);
   gst_element_set_state(bin, GST_STATE_PLAYING);
 
   playing = TRUE;

gst/gstxml.c

@@ -23,6 +23,7 @@
 #include "gst_private.h"
 
 #include "gstxml.h"
+#include "gstbin.h"
 
 
 static void 	gst_xml_class_init		(GstXMLClass *klass);
@@ -175,13 +176,30 @@ GstElement*
 gst_xml_get_element (GstXML *xml, const guchar *name) 
 {
   GstElement *element;
+  GList *topelements;
 
   g_return_val_if_fail(xml != NULL, NULL);
   g_return_val_if_fail(name != NULL, NULL);
 
   GST_DEBUG (0,"gstxml: getting element \"%s\"\n", name);
 
-  element = g_hash_table_lookup(xml->elements, name);
+  topelements = gst_xml_get_topelements (xml);
 
+  while (topelements) {
+    GstElement *top = GST_ELEMENT (topelements->data);
+
+    if (!strcmp (gst_element_get_name (top), name)) {
+      return top;
+    }
+    else {
+      if (GST_IS_BIN (top)) {
+        element = gst_bin_get_by_name (GST_BIN (top), name);
+
+	if (element) 
           return element;
+      }
+    }
+    topelements = g_list_next (topelements);
+  }
+  return NULL;
 }

tests/old/examples/xml/runxml.c

@@ -23,7 +23,6 @@ int main(int argc,char *argv[])
 
   bin = gst_xml_get_element(xml, "bin");
   
-  gst_element_set_state(bin, GST_STATE_READY);
   gst_element_set_state(bin, GST_STATE_PLAYING);
 
   playing = TRUE;

tests/sched/testcases1.tc

@@ -3,6 +3,7 @@ tcP: fakesrc ! fakesink
 tcS: A, fakesrc0, handoff 
 tcS: B, fakesink0, handoff
 tcI: 2
+tcT: 2000
 tcR: A,1,B,1,A,1,B,1
 
 
@@ -12,5 +13,6 @@ tcS: A, fakesrc0, handoff
 tcS: B, identity, handoff 
 tcS: C, fakesink0, handoff
 tcI: 2
+tcT: 2000
 tcR: A,1,B,1,C,1,A,1,B,1,C,1