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140 lines
4.1 KiB
C
140 lines
4.1 KiB
C
/* GStreamer
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* Copyright (C) <2009> Sebastian Dröge <sebastian.droege@collabora.co.uk>
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*
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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 Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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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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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#ifdef HAVE_CONFIG_H
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#include <config.h>
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#endif
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#include <gst/gst.h>
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#include "xdgmime/xdgmime.h"
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GST_DEBUG_CATEGORY (xdgmime_debug);
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#define GST_CAT_DEFAULT xdgmime_debug
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#if GLIB_CHECK_VERSION (2, 16, 0)
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#include <gio/gio.h>
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#else
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G_LOCK_DEFINE_STATIC (xdg_lock);
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#endif
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static void
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xdgmime_typefind (GstTypeFind * find, gpointer user_data)
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{
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gchar *mimetype;
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gsize length = 16384;
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guint64 tf_length;
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guint8 *data;
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if ((tf_length = gst_type_find_get_length (find)) > 0)
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length = MIN (length, tf_length);
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if ((data = gst_type_find_peek (find, 0, length)) == NULL)
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return;
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#if GLIB_CHECK_VERSION (2, 16, 0)
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{
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gchar *tmp;
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tmp = g_content_type_guess (NULL, data, length, NULL);
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if (tmp == NULL || g_content_type_is_unknown (tmp)) {
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g_free (tmp);
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return;
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}
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mimetype = g_content_type_get_mime_type (tmp);
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g_free (tmp);
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if (mimetype == NULL)
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return;
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GST_DEBUG ("Got mimetype '%s'", mimetype);
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}
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#else
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{
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const gchar *tmp;
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gint prio;
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/* FIXME: xdg-mime is not thread-safe as it stores the cache globally
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* and updates it from every call if changes were done without
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* any locking
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*/
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G_LOCK (xdg_lock);
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tmp = xdg_mime_get_mime_type_for_data (data, length, &prio);
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G_UNLOCK (xdg_lock);
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if (tmp == NULL || g_str_equal (tmp, XDG_MIME_TYPE_UNKNOWN))
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return;
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GST_DEBUG ("Got mimetype '%s' with prio %d", tmp, prio);
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mimetype = g_strdup (tmp);
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}
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#endif
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/* Ignore audio/video types:
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* - our own typefinders in -base are likely to be better at this
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* (and if they're not, we really want to fix them, that's why we don't
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* report xdg-detected audio/video types at all, not even with a low
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* probability)
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* - we want to detect GStreamer media types and not MIME types
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* - the purpose of this xdg mime finder is mainly to prevent false
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* positives of non-media formats, not to typefind audio/video formats */
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if (g_str_has_prefix (mimetype, "audio/") ||
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g_str_has_prefix (mimetype, "video/")) {
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GST_LOG ("Ignoring audio/video mime type");
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g_free (mimetype);
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return;
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}
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/* Again, we mainly want the xdg typefinding to prevent false-positives on
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* non-media formats, so suggest the type with a probability that trumps
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* uncertain results of our typefinders, but not more than that. */
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GST_LOG ("Suggesting '%s' with probability POSSIBLE", mimetype);
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gst_type_find_suggest_simple (find, GST_TYPE_FIND_POSSIBLE, mimetype, NULL);
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g_free (mimetype);
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}
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static gboolean
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plugin_init (GstPlugin * plugin)
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{
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GstCaps *caps = NULL;
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guint major, minor, micro, nano;
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gboolean ret;
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/* FIXME: GStreamer before 0.10.22.1 produced assertions
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* when storing typefind factories with NULL caps */
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gst_version (&major, &minor, µ, &nano);
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if (major <= 0 && minor <= 10 && micro <= 22 && nano <= 0)
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caps = gst_caps_new_empty ();
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GST_DEBUG_CATEGORY_INIT (xdgmime_debug, "xdgmime", 0, "XDG-MIME");
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ret = gst_type_find_register (plugin,
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"xdgmime", GST_RANK_MARGINAL, xdgmime_typefind, NULL, caps, NULL, NULL);
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if (caps)
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gst_caps_unref (caps);
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return ret;
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}
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GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
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GST_VERSION_MINOR,
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"xdgmime",
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"XDG-MIME",
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plugin_init, VERSION, "LGPL", GST_PACKAGE_NAME, GST_PACKAGE_ORIGIN)
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