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typefinding: move gio-based xdg mime typefinder from -bad to -base

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Its purposes is mainly to avoid false positives (e.g. mp3 typefinder
reporting a 20% probability and somesuch). Won't be registered if
the gio plugin has been disabled via ./configure --disable-gio.
This commit is contained in:
Tim-Philipp Müller 2009-09-03 00:14:02 +01:00
parent 889c318798
commit 4cacc441d8
3 changed files with 73 additions and 3 deletions
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2
configure.ac
View file

@ -528,7 +528,7 @@ AG_GST_CHECK_FEATURE(GNOME_VFS, [GNOME VFS], gnomevfs, [
dnl *** libgio ***
translit(dnm, m, l) AM_CONDITIONAL(USE_GIO, true)
AG_GST_CHECK_FEATURE(GIO, [GIO library], gio, [
PKG_CHECK_MODULES(GIO, gio-2.0 >= 2.15.2, [
PKG_CHECK_MODULES(GIO, gio-2.0 >= 2.16, [
HAVE_GIO="yes"
GIO_MODULE_DIR="`$PKG_CONFIG --variable=giomoduledir gio-2.0`"
AC_DEFINE_UNQUOTED(GIO_MODULE_DIR, "$GIO_MODULE_DIR",

4
gst/typefind/Makefile.am
View file

@ -1,8 +1,8 @@
plugin_LTLIBRARIES = libgsttypefindfunctions.la
libgsttypefindfunctions_la_SOURCES = gsttypefindfunctions.c
libgsttypefindfunctions_la_CFLAGS = $(GST_CFLAGS)
libgsttypefindfunctions_la_CFLAGS = $(GST_CFLAGS) $(GIO_CFLAGS)
libgsttypefindfunctions_la_LDFLAGS = $(GST_PLUGIN_LDFLAGS)
libgsttypefindfunctions_la_LIBADD = $(GST_LIBS)
libgsttypefindfunctions_la_LIBADD = $(GST_LIBS) $(GIO_LIBS)
libgsttypefindfunctions_la_LIBTOOLFLAGS = --tag=disable-static

70
gst/typefind/gsttypefindfunctions.c
View file

@ -1,5 +1,7 @@
/* GStreamer
* Copyright (C) 2003 Benjamin Otte <in7y118@public.uni-hamburg.de>
* Copyright (C) 2005-2009 Tim-Philipp Müller <tim centricular net>
* Copyright (C) 2009 Sebastian Dröge <sebastian.droege@collabora.co.uk>
*
* gsttypefindfunctions.c: collection of various typefind functions
*
@ -25,6 +27,12 @@
#include <glib.h>
/* don't want to add gio xdgmime typefinder if gio was disabled via configure */
#ifdef HAVE_GIO
#include <gio/gio.h>
#define USE_GIO
#endif
#include <gst/gsttypefind.h>
#include <gst/gstelement.h>
#include <gst/gstversion.h>
@ -3242,6 +3250,62 @@ vivo_type_find (GstTypeFind * tf, gpointer unused)
}
}
/*** XDG MIME typefinder (to avoid false positives mostly) ***/
#ifdef USE_GIO
static void
xdgmime_typefind (GstTypeFind * find, gpointer user_data)
{
gchar *mimetype;
gsize length = 16384;
guint64 tf_length;
guint8 *data;
gchar *tmp;
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;
tmp = g_content_type_guess (NULL, data, length, NULL);
if (tmp == NULL || g_content_type_is_unknown (tmp)) {
g_free (tmp);
return;
}
mimetype = g_content_type_get_mime_type (tmp);
g_free (tmp);
if (mimetype == NULL)
return;
GST_DEBUG ("Got mimetype '%s'", mimetype);
/* 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");
g_free (mimetype);
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);
g_free (mimetype);
}
#endif /* USE_GIO */
/*** generic typefind for streams that have some data at a specific position***/
typedef struct
{
@ -3688,6 +3752,12 @@ plugin_init (GstPlugin * plugin)
TYPE_FIND_REGISTER_START_WITH (plugin, "image/vnd.adobe.photoshop",
GST_RANK_SECONDARY, psd_exts, "8BPS\000\001\000\000\000\000", 10,
GST_TYPE_FIND_LIKELY);
#ifdef USE_GIO
TYPE_FIND_REGISTER (plugin, "xdgmime-base", GST_RANK_MARGINAL,
xdgmime_typefind, NULL, NULL, NULL, NULL);
#endif
return TRUE;
}