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/* XMMS2 - X Music Multiplexer System
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* Copyright (C) 2003-2006 XMMS2 Team
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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 Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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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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* Lesser General Public License for more details.
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* This file is a part of the XMMS2 client tutorial #8
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* Using a callback to catch a signal and restart it a few times
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/* include xmmsclient header */
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#include <xmmsclient/xmmsclient.h>
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/* also include this to get glib integration */
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#include <xmmsclient/xmmsclient-glib.h>
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/* include the GLib header */
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* We set this up as a callback for our current_id
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* method. Read the main program first before
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my_playtime (xmmsv_t *value, void *userdata)
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* At this point the result struct is filled with the
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* answer. And we can now extract it as normal.
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* we passed the mainloop as an argument
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* to set_notifier, which means it will be
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* passed as userdata to this function
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GMainLoop *ml = (GMainLoop *) userdata;
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if (!xmmsv_get_int (value, &time)) {
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fprintf (stderr, "Value didn't contain the expected type!\n");
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* Print the time on the same line and flush stdout
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* so that the text becomes visible.
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printf ("\r%4dms has been played", time);
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* We will exit the application after 5000ms have passed.
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* Otherwise we will restart the signal to enable this
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* callback to be called yet another time.
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printf ("\nMore than 5000 ms has been played, exiting...\n");
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g_main_loop_quit (ml);
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/* Tell the server to send updates to the
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* same callback (AKA restart the signal) */
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* We use the return value of the callback once
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* again to determine whether to restart the signal
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main (int argc, char **argv)
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/* The mainloop we should use later */
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* The first part of this program is
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* commented on in tut1.c
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xmmsc_connection_t *connection;
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xmmsc_result_t *result;
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* In an async client we still connect as
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* normal. Read up on this in earlier
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* tutorials if you need.
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connection = xmmsc_init ("tutorial6");
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fprintf (stderr, "OOM!\n");
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if (!xmmsc_connect (connection, getenv ("XMMS_PATH"))) {
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fprintf (stderr, "Connection failed: %s\n",
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xmmsc_get_last_error (connection));
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* Initialize the mainloop, for more information about GLib mainloop
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ml = g_main_loop_new (NULL, FALSE);
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* We issue two async commands to restart playback.
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* Since we don't want to set a notifier for those,
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* we can free the result immediately.
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xmmsc_result_unref (xmmsc_playback_stop (connection));
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xmmsc_result_unref (xmmsc_playback_start (connection));
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printf ("Playtime: \n");
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result = xmmsc_signal_playback_playtime (connection);
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xmmsc_result_notifier_set (result, my_playtime, ml);
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xmmsc_result_unref (result);
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* As you see we do it pretty much the same way that we did in tut2, but
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* instead of being able to access the current id directly (as we would
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* have if we where blocking) we need to wait until xmms calls our
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* my_current_id function. This will keep your GUI from hanging while
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* waiting for xmms2 to answer your command.
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* In order to make xmmsclient call your callback functions we need to put
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* the fd of the connection into the mainloop of our program. For your
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* convenience the xmmsclient lib ships with automatic integration with
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* GMainLoop. We just need to link with xmmsclient-glib and do the following
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* call to make it work.
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xmmsc_mainloop_gmain_init (connection);
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* We are now all set to go. Just run the main loop and watch the magic.
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g_main_loop_run (ml);
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removed
doc/tutorial/c/tut8.c
