docs: add documentation for GstTagMux

docs/libs/gst-plugins-base-libs-docs.sgml

@@ -191,6 +191,7 @@
       <xi:include href="xml/gsttagxmp.xml" />
       <xi:include href="xml/gsttagxmpwriter.xml" />
       <xi:include href="xml/gsttagdemux.xml" />
+      <xi:include href="xml/gsttagmux.xml" />
       <xi:include href="xml/gsttaglanguagecodes.xml" />
     </chapter>
 

docs/libs/gst-plugins-base-libs-sections.txt

@@ -1821,6 +1821,21 @@ gst_tag_demux_get_type
 gst_tag_demux_result_get_type
 </SECTION>
 
+<SECTION>
+<FILE>gsttagmux</FILE>
+<INCLUDE>gst/tag/gsttagmux.h</INCLUDE>
+GstTagMux
+GstTagMuxClass
+<SUBSECTION Standard>
+GstTagMuxPrivate
+GST_IS_TAG_MUX
+GST_IS_TAG_MUX_CLASS
+GST_TAG_MUX
+GST_TAG_MUX_CLASS
+GST_TYPE_TAG_MUX
+gst_tag_demux_get_type
+</SECTION>
+
 <SECTION>
 <FILE>gsttaglanguagecodes</FILE>
 <INCLUDE>gst/tag/tag.h</INCLUDE>

gst-libs/gst/tag/gsttagmux.c

@@ -21,9 +21,36 @@
  */
 
 /**
- * FIXME: documentation
+ * SECTION:gsttagmux
+ * @see_also: GstApeMux, GstId3Mux
+ * @short_description: Base class for adding tags that are in one single chunk
+ *                     directly at the beginning or at the end of a file
  *
- * Since: 0.10.36
+ * <refsect2>
+ * <para>
+ * Provides a base class for adding tags at the beginning or end of a
+ * stream.
+ * </para>
+ * <title>Deriving from GstTagMux</title>
+ * <para>
+ * Subclasses have to do the following things:
+ * <itemizedlist>
+ *  <listitem><para>
+ *  In their base init function, they must add pad templates for the sink
+ *  pad and the source pad to the element class, describing the media type
+ *  they accept and output in the caps of the pad template.
+ *  </para></listitem>
+ *  <listitem><para>
+ *  In their class init function, they must override the
+ *  GST_TAG_MUX_CLASS(mux_klass)->render_start_tag and/or
+ *  GST_TAG_MUX_CLASS(mux_klass)->render_end_tag vfuncs and set up a render
+ *  function.
+ *  </para></listitem>
+ * </itemizedlist>
+ * </para>
+ * </refsect2>
+ *
+ * Since 0.10.36
  */
 #ifdef HAVE_CONFIG_H
 #include <config.h>

gst-libs/gst/tag/gsttagmux.h

@@ -1,7 +1,6 @@
 /* GStreamer tag muxer base class
- *
  * Copyright (C) 2006 Christophe Fergeau  <teuf@gnome.org>
- * Copyright (C) 2006 Tim-Philipp Müller <tim centricular net>
+ * Copyright (C) 2006,2011 Tim-Philipp Müller <tim centricular net>
  * Copyright (C) 2009 Pioneers of the Inevitable <songbird@songbirdnest.com>
  *
  * This library is free software; you can redistribute it and/or
@@ -42,6 +41,14 @@ typedef struct _GstTagMux GstTagMux;
 typedef struct _GstTagMuxClass GstTagMuxClass;
 typedef struct _GstTagMuxPrivate GstTagMuxPrivate;
 
+/**
+ * GstTagMux:
+ * @element: parent element
+ *
+ * Opaque #GstTagMux structure.
+ *
+ * Since: 0.10.36
+ */
 struct _GstTagMux {
   GstElement    element;
 
@@ -51,6 +58,19 @@ struct _GstTagMux {
   gpointer _gst_reserved[GST_PADDING];
 };
 
+/**
+ * GstTagMuxClass:
+ * @parent_class: the parent class.
+ * @render_start_tag: create a tag buffer to add to the beginning of the
+ *     input stream given a tag list, or NULL
+ * @render_end_tag: create a tag buffer to add to the end of the
+ *     input stream given a tag list, or NULL
+ *
+ * The #GstTagMuxClass structure. Subclasses need to override at least one
+ * of the two render vfuncs.
+ *
+ * Since: 0.10.36
+ */
 struct _GstTagMuxClass {
   GstElementClass parent_class;