/* GStreamer * Copyright (C) <2009> Sebastian Dröge * * 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. */ #ifdef HAVE_CONFIG_H #include #endif #include #include "xdgmime/xdgmime.h" GST_DEBUG_CATEGORY (xdgmime_debug); #define GST_CAT_DEFAULT xdgmime_debug G_LOCK_DEFINE_STATIC (xdg_lock); static void xdgmime_typefind (GstTypeFind * find, gpointer user_data) { const gchar *mimetype; gsize length = 16384; guint64 tf_length; gint prio; guint8 *data; if ((tf_length = gst_type_find_get_length (find)) > 0) length = MIN (length, tf_length); if ((data = gst_type_find_peek (find, 0, length)) == NULL) return; /* FIXME: xdg-mime is not thread-safe as it stores the cache globally * and updates it from every call if changes were done without * any locking */ G_LOCK (xdg_lock); mimetype = xdg_mime_get_mime_type_for_data (data, length, &prio); G_UNLOCK (xdg_lock); if (mimetype == NULL || g_str_equal (mimetype, XDG_MIME_TYPE_UNKNOWN)) return; GST_DEBUG ("Got mimetype '%s' with prio %d", mimetype, prio); /* Ignore audio/video types: * - our own typefinders in -base are likely to be better at this * (and if they're not, we really want to fix them, that's why we don't * report xdg-detected audio/video types at all, not even with a low * probability) * - we want to detect GStreamer media types and not MIME types * - the purpose of this xdg mime finder is mainly to prevent false * positives of non-media formats, not to typefind audio/video formats */ if (g_str_has_prefix (mimetype, "audio/") || g_str_has_prefix (mimetype, "video/")) { GST_LOG ("Ignoring audio/video mime type"); return; } /* Again, we mainly want the xdg typefinding to prevent false-positives on * non-media formats, so suggest the type with a probability that trumps * uncertain results of our typefinders, but not more than that. */ GST_LOG ("Suggesting '%s' with probability POSSIBLE", mimetype); gst_type_find_suggest_simple (find, GST_TYPE_FIND_POSSIBLE, mimetype, NULL); } static gboolean plugin_init (GstPlugin * plugin) { GstCaps *caps = NULL; guint major, minor, micro, nano; gboolean ret; /* FIXME: GStreamer before 0.10.22.1 produced assertions * when storing typefind factories with NULL caps */ gst_version (&major, &minor, µ, &nano); if (major <= 0 && minor <= 10 && micro <= 22 && nano <= 0) caps = gst_caps_new_empty (); GST_DEBUG_CATEGORY_INIT (xdgmime_debug, "xdgmime", 0, "XDG-MIME"); ret = gst_type_find_register (plugin, "xdgmime", GST_RANK_MARGINAL, xdgmime_typefind, NULL, caps, NULL, NULL); if (caps) gst_caps_unref (caps); return ret; } GST_PLUGIN_DEFINE (GST_VERSION_MAJOR, GST_VERSION_MINOR, "xdgmime", "XDG-MIME", plugin_init, VERSION, "LGPL", GST_PACKAGE_NAME, GST_PACKAGE_ORIGIN)