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53898dac39
Original commit message from CVS: add GstPoptOption to work around evil poptOption struct def make sure popt is i18n'd expand gnome example
96 lines
3.2 KiB
XML
96 lines
3.2 KiB
XML
<chapter id="chapter-gnome">
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<title>GNOME integration</title>
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<para>
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GStreamer is fairly easy to integrate with GNOME applications.
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GStreamer uses libxml 2.0, GLib 2.0 and popt, as do all other
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GNOME applications.
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There are however some basic issues you need to address in your GNOME
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applications.
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</para>
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<sect1>
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<title>Command line options</title>
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<para>
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GNOME applications call gnome_program_init () to parse command-line
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options and initialize the necessary gnome modules.
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GStreamer applications normally call gst_init (&argc, &argv) to
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do the same for GStreamer.
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</para>
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<para>
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Each of these two swallows the program options passed to the program,
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so we need a different way to allow both GNOME and GStreamer to parse
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the command-line options. This is shown in the following example.
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</para>
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<programlisting>
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/* example-begin gnome.c */
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#include <gnome.h>
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#include <gst/gst.h>
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int
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main (int argc, char **argv)
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{
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GstPoptOption options[] = {
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{ NULL, '\0', POPT_ARG_INCLUDE_TABLE, NULL, 0, "GStreamer", NULL },
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POPT_TABLEEND
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};
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GnomeProgram *program;
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poptContext context;
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const gchar **argvn;
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GstElement *pipeline;
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GstElement *src, *sink;
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options[0].arg = (void *) gst_init_get_popt_table ();
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g_print ("Calling gnome_program_init with the GStreamer popt table\n");
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/* gnome_program_init will initialize GStreamer now
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* as a side effect of having the GStreamer popt table passed. */
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if (! (program = gnome_program_init ("my_package", "0.1", LIBGNOMEUI_MODULE,
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argc, argv,
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GNOME_PARAM_POPT_TABLE, options,
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NULL)))
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g_error ("gnome_program_init failed");
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g_print ("Getting gnome-program popt context\n");
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g_object_get (program, "popt-context", &context, NULL);
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argvn = poptGetArgs (context);
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if (!argvn) {
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g_print ("Run this example with some arguments to see how it works.\n");
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return 0;
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}
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g_print ("Printing rest of arguments\n");
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while (*argvn) {
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g_print ("argument: %s\n", *argvn);
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++argvn;
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}
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/* do some GStreamer things to show everything's initialized properly */
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g_print ("Doing some GStreamer stuff to show that everything works\n");
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pipeline = gst_pipeline_new ("pipeline");
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src = gst_element_factory_make ("fakesrc", "src");
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sink = gst_element_factory_make ("fakesink", "sink");
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gst_bin_add_many (GST_BIN (pipeline), src, sink, NULL);
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gst_element_link (src, sink);
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gst_element_set_state (pipeline, GST_STATE_PLAYING);
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gst_bin_iterate (GST_BIN (pipeline));
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gst_element_set_state (pipeline, GST_STATE_NULL);
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return 0;
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}
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/* example-end gnome.c */
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</programlisting>
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<para>
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If you try out this program, you will see that when called with
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--help, it will print out both GStreamer and GNOME help arguments.
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All of the arguments that didn't belong to either end up in the
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argvn pointer array.
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</para>
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<para>
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FIXME: flesh this out more. How do we get the GStreamer arguments
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at the end ?
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FIXME: add a GConf bit.
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</para>
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</sect1>
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</chapter>
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