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7a85af3ce6
The whole raison d'etre of this typefinder is to help avoid false positives when used in combination with our main typefinder in -base. Its task is not really to typefind audio/video files, even less so given that it detects *MIME* types, not GStreamer media types. Therefore, if this typefinder detects an audio or video type, don't even suggest it - our own typefinders are hopefully better at this and detect the right type of type on top of that, and even if they're not we really want to know about it and fix it. Fixes #575157.
108 lines
3.5 KiB
C
108 lines
3.5 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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G_LOCK_DEFINE_STATIC (xdg_lock);
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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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const gchar *mimetype;
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gsize length = 16384;
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guint64 tf_length;
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gint prio;
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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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/* 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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mimetype = xdg_mime_get_mime_type_for_data (data, length, &prio);
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G_UNLOCK (xdg_lock);
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if (mimetype == NULL || g_str_equal (mimetype, XDG_MIME_TYPE_UNKNOWN))
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return;
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GST_DEBUG ("Got mimetype '%s' with prio %d", mimetype, prio);
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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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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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}
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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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