mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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4a402c1c7d
Found via `codespell` https://bugzilla.gnome.org/show_bug.cgi?id=795610
1344 lines
39 KiB
C
1344 lines
39 KiB
C
/* GStreamer
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* Copyright (C) 2006 Stefan Kost <ensonic@users.sf.net>
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*
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* gstpreset.c: helper interface for element presets
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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., 51 Franklin St, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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/**
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* SECTION:gstpreset
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* @title: GstPreset
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* @short_description: helper interface for element presets
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*
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* This interface offers methods to query and manipulate parameter preset sets.
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* A preset is a bunch of property settings, together with meta data and a name.
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* The name of a preset serves as key for subsequent method calls to manipulate
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* single presets.
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* All instances of one type will share the list of presets. The list is created
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* on demand, if presets are not used, the list is not created.
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*
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* The interface comes with a default implementation that serves most plugins.
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* Wrapper plugins will override most methods to implement support for the
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* native preset format of those wrapped plugins.
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* One method that is useful to be overridden is gst_preset_get_property_names().
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* With that one can control which properties are saved and in which order.
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* When implementing support for read-only presets, one should set the vmethods
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* for gst_preset_save_preset() and gst_preset_delete_preset() to %NULL.
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* Applications can use gst_preset_is_editable() to check for that.
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*
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* The default implementation supports presets located in a system directory,
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* application specific directory and in the users home directory. When getting
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* a list of presets individual presets are read and overlaid in 1) system,
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* 2) application and 3) user order. Whenever an earlier entry is newer, the
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* later entries will be updated. Since 1.8 you can also provide extra paths
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* where to find presets through the GST_PRESET_PATH environment variable.
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* Presets found in those paths will be considered as "app presets".
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*/
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/* FIXME:
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* - non racyness
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* - we need to avoid two instances writing the preset file
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* -> flock(fileno()), http://www.ecst.csuchico.edu/~beej/guide/ipc/flock.html
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* -> open exclusive
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* -> better save the new file to a tempfile and then rename?
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* - we like to know when any other instance makes changes to the keyfile
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* - then ui can be updated
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* - and we make sure that we don't lose edits
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* -> its the same problem actually, once for inside a process, once system-
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* wide
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* - can we use a lock inside a names shared memory segment?
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*
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* - should there be a 'preset-list' property to get the preset list
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* (and to connect a notify:: to to listen for changes)
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* we could use gnome_vfs_monitor_add() to monitor the user preset_file.
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*
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* - should there be a 'preset-name' property so that we can set a preset via
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* gst-launch, or should we handle this with special syntax in gst-launch:
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* gst-launch element preset:<preset-name> property=value ...
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* - this would allow to have preset-bundles too (a preset on bins that
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* specifies presets for children
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*/
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#include "gst_private.h"
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#include "gstpreset.h"
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#include "gstchildproxy.h"
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#include "gstinfo.h"
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#include "gstvalue.h"
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#ifdef HAVE_UNISTD_H
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#include <unistd.h>
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#endif
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#include <glib/gstdio.h>
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#ifdef G_OS_WIN32
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#define WIN32_LEAN_AND_MEAN
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#include <windows.h>
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extern HMODULE _priv_gst_dll_handle;
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#endif
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#define GST_CAT_DEFAULT preset_debug
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GST_DEBUG_CATEGORY_STATIC (GST_CAT_DEFAULT);
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/* defines for keyfile usage, this group contains the element type name and
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* version these presets belong to. */
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#define PRESET_HEADER "_presets_"
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/* keys of the preset header section */
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#define PRESET_HEADER_ELEMENT_NAME "element-name"
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#define PRESET_HEADER_VERSION "version"
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static GQuark preset_user_path_quark = 0;
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static GQuark preset_app_path_quark = 0;
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static GQuark preset_system_path_quark = 0;
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static GQuark preset_quark = 0;
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/* the application can set a custom path that is checked in addition to standard
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* system and user dirs. This helps to develop new presets first local to the
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* application.
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*/
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static gchar *preset_app_dir = NULL;
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/* default iface implementation */
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static gboolean gst_preset_default_save_presets_file (GstPreset * preset);
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/*
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* preset_get_paths:
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* @preset: a #GObject that implements #GstPreset
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* @preset_user_path: (out) (allow-none): location for path or %NULL
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* @preset_app_path: (out) (allow-none): location for path or %NULL
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* @preset_system_path: (out) (allow-none): location for path or %NULL
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*
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* Fetch the preset_path for user local, application specific and system wide
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* settings. Don't free after use.
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*
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* Returns: %FALSE if no paths could be found.
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*/
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static gboolean
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preset_get_paths (GstPreset * preset, const gchar ** preset_user_path,
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const gchar ** preset_app_path, const gchar ** preset_system_path)
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{
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GType type = G_TYPE_FROM_INSTANCE (preset);
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gchar *preset_path;
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const gchar *element_name;
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/* we use the element name when we must construct the paths */
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element_name = G_OBJECT_TYPE_NAME (preset);
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GST_INFO_OBJECT (preset, "element_name: '%s'", element_name);
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if (preset_user_path) {
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/* preset user path requested, see if we have it cached in the qdata */
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if (!(preset_path = g_type_get_qdata (type, preset_user_path_quark))) {
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gchar *preset_dir;
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/* user presets go in user's XDG data directory. */
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preset_dir = g_build_filename (g_get_user_data_dir (),
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"gstreamer-" GST_API_VERSION, "presets", NULL);
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GST_INFO_OBJECT (preset, "user_preset_dir: '%s'", preset_dir);
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preset_path =
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g_strdup_printf ("%s" G_DIR_SEPARATOR_S "%s.prs", preset_dir,
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element_name);
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GST_INFO_OBJECT (preset, "user_preset_path: '%s'", preset_path);
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/* create dirs */
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g_mkdir_with_parents (preset_dir, 0755);
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g_free (preset_dir);
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/* cache the preset path to the type */
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g_type_set_qdata (type, preset_user_path_quark, preset_path);
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}
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*preset_user_path = preset_path;
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}
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if (preset_app_path) {
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if (preset_app_dir) {
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if (!(preset_path = g_type_get_qdata (type, preset_system_path_quark))) {
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preset_path = g_strdup_printf ("%s" G_DIR_SEPARATOR_S "%s.prs",
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preset_app_dir, element_name);
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GST_INFO_OBJECT (preset, "application_preset_path: '%s'", preset_path);
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/* cache the preset path to the type */
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g_type_set_qdata (type, preset_app_path_quark, preset_path);
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}
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*preset_app_path = preset_path;
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} else {
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*preset_app_path = NULL;
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}
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}
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if (preset_system_path) {
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/* preset system path requested, see if we have it cached in the qdata */
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if (!(preset_path = g_type_get_qdata (type, preset_system_path_quark))) {
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gchar *preset_dir;
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/* system presets in '$GST_DATADIR/gstreamer-1.0/presets/GstAudioPanorama.prs' */
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#ifdef G_OS_WIN32
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gchar *basedir =
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g_win32_get_package_installation_directory_of_module
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(_priv_gst_dll_handle);
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preset_dir =
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g_build_filename (basedir, "share", "gstreamer-" GST_API_VERSION,
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"presets", NULL);
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g_free (basedir);
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#else
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preset_dir = g_build_filename (GST_DATADIR, "gstreamer-" GST_API_VERSION,
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"presets", NULL);
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#endif
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GST_INFO_OBJECT (preset, "system_preset_dir: '%s'", preset_dir);
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preset_path = g_strdup_printf ("%s" G_DIR_SEPARATOR_S "%s.prs",
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preset_dir, element_name);
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GST_INFO_OBJECT (preset, "system_preset_path: '%s'", preset_path);
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/* create dirs */
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g_mkdir_with_parents (preset_dir, 0755);
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g_free (preset_dir);
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/* cache the preset path to the type */
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g_type_set_qdata (type, preset_system_path_quark, preset_path);
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}
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*preset_system_path = preset_path;
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}
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return TRUE;
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}
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static gboolean
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preset_skip_property (GParamSpec * property)
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{
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if (((property->flags & G_PARAM_READWRITE) != G_PARAM_READWRITE) ||
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(property->flags & G_PARAM_CONSTRUCT_ONLY))
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return TRUE;
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/* FIXME: skip GST_PARAM_NOT_PRESETABLE, see #522205 */
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return FALSE;
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}
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static guint64
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preset_parse_version (const gchar * str_version)
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{
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guint major, minor, micro, nano;
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gint num;
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major = minor = micro = nano = 0;
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/* parse version (e.g. 0.10.15.1) to guint64 */
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num = sscanf (str_version, "%u.%u.%u.%u", &major, &minor, µ, &nano);
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/* make sure we have at least "major.minor" */
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if (num > 1) {
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guint64 version;
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version = ((((major << 8 | minor) << 8) | micro) << 8) | nano;
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GST_DEBUG ("version %s -> %" G_GUINT64_FORMAT, str_version, version);
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return version;
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}
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return G_GUINT64_CONSTANT (0);
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}
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static GKeyFile *
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preset_open_and_parse_header (GstPreset * preset, const gchar * preset_path,
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guint64 * preset_version)
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{
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GKeyFile *in;
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GError *error = NULL;
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gboolean res;
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const gchar *element_name;
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gchar *name;
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in = g_key_file_new ();
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res = g_key_file_load_from_file (in, preset_path,
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G_KEY_FILE_KEEP_COMMENTS | G_KEY_FILE_KEEP_TRANSLATIONS, &error);
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if (!res || error != NULL)
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goto load_error;
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/* element type name and preset name must match or we are dealing with a wrong
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* preset file */
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element_name = G_OBJECT_TYPE_NAME (preset);
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name =
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g_key_file_get_value (in, PRESET_HEADER, PRESET_HEADER_ELEMENT_NAME,
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NULL);
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if (!name || strcmp (name, element_name))
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goto wrong_name;
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g_free (name);
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/* get the version now so that the caller can check it */
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if (preset_version) {
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gchar *str =
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g_key_file_get_value (in, PRESET_HEADER, PRESET_HEADER_VERSION, NULL);
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*preset_version = preset_parse_version (str);
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g_free (str);
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}
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return in;
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/* ERRORS */
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load_error:
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{
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GST_INFO_OBJECT (preset, "Unable to read preset file %s: %s",
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preset_path, error->message);
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g_error_free (error);
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g_key_file_free (in);
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return NULL;
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}
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wrong_name:
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{
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GST_WARNING_OBJECT (preset,
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"Wrong element name in preset file %s. Expected %s, got %s",
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preset_path, element_name, GST_STR_NULL (name));
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g_free (name);
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g_key_file_free (in);
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return NULL;
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}
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}
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static void
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preset_merge (GKeyFile * system, GKeyFile * user)
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{
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gchar *str;
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gchar **groups, **keys;
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gsize i, j, num_groups, num_keys;
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/* copy file comment if there is any */
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if ((str = g_key_file_get_comment (user, NULL, NULL, NULL))) {
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g_key_file_set_comment (system, NULL, NULL, str, NULL);
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g_free (str);
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}
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/* get groups in user and copy into system */
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groups = g_key_file_get_groups (user, &num_groups);
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for (i = 0; i < num_groups; i++) {
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/* copy group comment if there is any */
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if ((str = g_key_file_get_comment (user, groups[i], NULL, NULL))) {
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g_key_file_set_comment (system, groups[i], NULL, str, NULL);
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g_free (str);
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}
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/* ignore private groups */
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if (groups[i][0] == '_')
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continue;
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/* if group already exists in system, remove and re-add keys from user */
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if (g_key_file_has_group (system, groups[i])) {
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g_key_file_remove_group (system, groups[i], NULL);
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}
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keys = g_key_file_get_keys (user, groups[i], &num_keys, NULL);
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for (j = 0; j < num_keys; j++) {
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/* copy key comment if there is any */
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if ((str = g_key_file_get_comment (user, groups[i], keys[j], NULL))) {
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g_key_file_set_comment (system, groups[i], keys[j], str, NULL);
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g_free (str);
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}
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str = g_key_file_get_value (user, groups[i], keys[j], NULL);
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g_key_file_set_value (system, groups[i], keys[j], str);
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g_free (str);
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}
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g_strfreev (keys);
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}
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g_strfreev (groups);
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}
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typedef struct
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{
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GKeyFile *preset;
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guint64 version;
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} PresetAndVersion;
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static gint
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compare_preset_and_version (gconstpointer a, gconstpointer b,
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gpointer user_data)
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{
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const PresetAndVersion *pa = a, *pb = b;
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if (pa->version > pb->version)
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return -1;
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if (pa->version < pb->version)
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return 1;
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else
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return 0;
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}
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/* reads the user and system presets files and merges them together. This
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* function caches the GKeyFile on the element type. If there is no existing
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* preset file, a new in-memory GKeyFile will be created. */
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static GKeyFile *
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preset_get_keyfile (GstPreset * preset)
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{
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GKeyFile *presets;
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GType type = G_TYPE_FROM_INSTANCE (preset);
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/* first see if the have a cached version for the type */
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if (!(presets = g_type_get_qdata (type, preset_quark))) {
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const gchar *preset_user_path, *preset_app_path, *preset_system_path;
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guint64 version_system = G_GUINT64_CONSTANT (0);
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guint64 version_app = G_GUINT64_CONSTANT (0);
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guint64 version_user = G_GUINT64_CONSTANT (0);
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guint64 version = G_GUINT64_CONSTANT (0);
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gboolean merged = FALSE;
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GKeyFile *in_user, *in_app = NULL, *in_system;
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GQueue in_env = G_QUEUE_INIT;
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gboolean have_env = FALSE;
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const gchar *envvar;
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/* try to load the user, app and system presets, we do this to get the
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* versions of all files. */
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preset_get_paths (preset, &preset_user_path, &preset_app_path,
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&preset_system_path);
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in_user = preset_open_and_parse_header (preset, preset_user_path,
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&version_user);
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if (preset_app_path) {
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in_app = preset_open_and_parse_header (preset, preset_app_path,
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&version_app);
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}
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envvar = g_getenv ("GST_PRESET_PATH");
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if (envvar) {
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gint i;
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gchar **preset_dirs = g_strsplit (envvar, G_SEARCHPATH_SEPARATOR_S, -1);
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for (i = 0; preset_dirs[i]; i++) {
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gchar *preset_path = g_strdup_printf ("%s" G_DIR_SEPARATOR_S "%s.prs",
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preset_dirs[i], G_OBJECT_TYPE_NAME (preset));
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GKeyFile *env_file;
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guint64 env_version;
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env_file = preset_open_and_parse_header (preset, preset_path,
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&env_version);
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g_free (preset_path);
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if (env_file) {
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PresetAndVersion *pv = g_new (PresetAndVersion, 1);
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pv->preset = env_file;
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pv->version = env_version;
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g_queue_push_tail (&in_env, pv);
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have_env = TRUE;
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}
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}
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g_strfreev (preset_dirs);
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}
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in_system = preset_open_and_parse_header (preset, preset_system_path,
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&version_system);
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/* compare version to check for merge */
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if (in_system) {
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presets = in_system;
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version = version_system;
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}
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if (have_env) {
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GList *l;
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/* merge the ones from the environment paths. If any of them has a
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* higher version, take that as the "master" version. Lower versions are
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* then just merged in. */
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g_queue_sort (&in_env, compare_preset_and_version, NULL);
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/* highest version to lowest */
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for (l = in_env.head; l; l = l->next) {
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PresetAndVersion *pv = l->data;
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if (version > pv->version) {
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preset_merge (presets, pv->preset);
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g_key_file_free (pv->preset);
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} else {
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if (presets)
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g_key_file_free (presets);
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|
presets = pv->preset;
|
|
version = pv->version;
|
|
}
|
|
g_free (pv);
|
|
}
|
|
g_queue_clear (&in_env);
|
|
}
|
|
|
|
if (in_app) {
|
|
/* if system/env version is higher, merge */
|
|
if (version > version_app) {
|
|
preset_merge (presets, in_app);
|
|
g_key_file_free (in_app);
|
|
} else {
|
|
if (presets)
|
|
g_key_file_free (presets);
|
|
presets = in_app;
|
|
version = version_app;
|
|
}
|
|
}
|
|
if (in_user) {
|
|
/* if system/env or app version is higher, merge */
|
|
if (version > version_user) {
|
|
preset_merge (presets, in_user);
|
|
g_key_file_free (in_user);
|
|
merged = TRUE;
|
|
} else {
|
|
if (presets)
|
|
g_key_file_free (presets);
|
|
presets = in_user;
|
|
}
|
|
}
|
|
|
|
if (!presets) {
|
|
/* we did not load a user, app or system presets file, create a new one */
|
|
presets = g_key_file_new ();
|
|
g_key_file_set_string (presets, PRESET_HEADER, PRESET_HEADER_ELEMENT_NAME,
|
|
G_OBJECT_TYPE_NAME (preset));
|
|
}
|
|
|
|
/* attach the preset to the type */
|
|
g_type_set_qdata (type, preset_quark, (gpointer) presets);
|
|
|
|
if (merged) {
|
|
gst_preset_default_save_presets_file (preset);
|
|
}
|
|
}
|
|
return presets;
|
|
}
|
|
|
|
static gint
|
|
compare_strings (gchar ** a, gchar ** b, gpointer user_data)
|
|
{
|
|
return g_strcmp0 (*a, *b);
|
|
}
|
|
|
|
/* get a list of all supported preset names for an element */
|
|
static gchar **
|
|
gst_preset_default_get_preset_names (GstPreset * preset)
|
|
{
|
|
GKeyFile *presets;
|
|
gsize i, num_groups;
|
|
gchar **groups;
|
|
|
|
/* get the presets from the type */
|
|
if (!(presets = preset_get_keyfile (preset)))
|
|
goto no_presets;
|
|
|
|
/* get the groups, which are also the preset names */
|
|
if (!(groups = g_key_file_get_groups (presets, &num_groups)))
|
|
goto no_groups;
|
|
|
|
/* remove all private group names starting with '_' from the array */
|
|
for (i = 0; i < num_groups; i++) {
|
|
if (groups[i][0] == '_') {
|
|
/* free private group */
|
|
g_free (groups[i]);
|
|
/* move last element of list down */
|
|
num_groups--;
|
|
/* move last element into removed element */
|
|
groups[i] = groups[num_groups];
|
|
groups[num_groups] = NULL;
|
|
}
|
|
}
|
|
if (!num_groups) {
|
|
GST_INFO_OBJECT (preset, "Empty preset file");
|
|
g_strfreev (groups);
|
|
return NULL;
|
|
}
|
|
|
|
/* sort the array now */
|
|
g_qsort_with_data (groups, num_groups, sizeof (gchar *),
|
|
(GCompareDataFunc) compare_strings, NULL);
|
|
|
|
return groups;
|
|
|
|
/* ERRORS */
|
|
no_presets:
|
|
{
|
|
GST_WARNING_OBJECT (preset, "Could not load presets");
|
|
return NULL;
|
|
}
|
|
no_groups:
|
|
{
|
|
GST_WARNING_OBJECT (preset, "Could not find preset groups");
|
|
return NULL;
|
|
}
|
|
}
|
|
|
|
/* get a list of all property names that are used for presets */
|
|
static gchar **
|
|
gst_preset_default_get_property_names (GstPreset * preset)
|
|
{
|
|
GParamSpec **props;
|
|
guint i, j = 0, n_props;
|
|
GObjectClass *gclass;
|
|
gboolean is_child_proxy;
|
|
gchar **result = NULL;
|
|
|
|
gclass = G_OBJECT_CLASS (GST_ELEMENT_GET_CLASS (preset));
|
|
is_child_proxy = GST_IS_CHILD_PROXY (preset);
|
|
|
|
/* get a list of object properties */
|
|
props = g_object_class_list_properties (gclass, &n_props);
|
|
if (props) {
|
|
/* allocate array big enough to hold the worst case, including a terminating
|
|
* NULL pointer. */
|
|
result = g_new (gchar *, n_props + 1);
|
|
|
|
/* now filter out the properties that we can use for presets */
|
|
GST_DEBUG_OBJECT (preset, " filtering properties: %u", n_props);
|
|
for (i = 0; i < n_props; i++) {
|
|
if (preset_skip_property (props[i]))
|
|
continue;
|
|
GST_DEBUG_OBJECT (preset, " using: %s", props[i]->name);
|
|
result[j++] = g_strdup (props[i]->name);
|
|
}
|
|
g_free (props);
|
|
}
|
|
|
|
if (is_child_proxy) {
|
|
guint c, n_children;
|
|
GObject *child;
|
|
|
|
n_children = gst_child_proxy_get_children_count ((GstChildProxy *) preset);
|
|
for (c = 0; c < n_children; c++) {
|
|
child = gst_child_proxy_get_child_by_index ((GstChildProxy *) preset, c);
|
|
gclass = G_OBJECT_CLASS (GST_ELEMENT_GET_CLASS (child));
|
|
|
|
props = g_object_class_list_properties (gclass, &n_props);
|
|
if (props) {
|
|
/* resize property name array */
|
|
result = g_renew (gchar *, result, j + n_props + 1);
|
|
|
|
/* now filter out the properties that we can use for presets */
|
|
GST_DEBUG_OBJECT (preset, " filtering properties: %u", n_props);
|
|
for (i = 0; i < n_props; i++) {
|
|
if (preset_skip_property (props[i]))
|
|
continue;
|
|
GST_DEBUG_OBJECT (preset, " using: %s::%s",
|
|
GST_OBJECT_NAME (child), props[i]->name);
|
|
result[j++] = g_strdup_printf ("%s::%s", GST_OBJECT_NAME (child),
|
|
props[i]->name);
|
|
}
|
|
g_free (props);
|
|
}
|
|
|
|
g_object_unref (child);
|
|
}
|
|
}
|
|
if (!result) {
|
|
GST_INFO_OBJECT (preset, "object has no properties");
|
|
} else {
|
|
result[j] = NULL;
|
|
}
|
|
return result;
|
|
}
|
|
|
|
/* load the presets of @name for the instance @preset. Returns %FALSE if something
|
|
* failed. */
|
|
static gboolean
|
|
gst_preset_default_load_preset (GstPreset * preset, const gchar * name)
|
|
{
|
|
GKeyFile *presets;
|
|
gchar **props;
|
|
guint i;
|
|
GObjectClass *gclass;
|
|
gboolean is_child_proxy;
|
|
|
|
/* get the presets from the type */
|
|
if (!(presets = preset_get_keyfile (preset)))
|
|
goto no_presets;
|
|
|
|
/* get the preset name */
|
|
if (!g_key_file_has_group (presets, name))
|
|
goto no_group;
|
|
|
|
GST_DEBUG_OBJECT (preset, "loading preset : '%s'", name);
|
|
|
|
/* get the properties that we can configure in this element */
|
|
if (!(props = gst_preset_get_property_names (preset)))
|
|
goto no_properties;
|
|
|
|
gclass = G_OBJECT_CLASS (GST_ELEMENT_GET_CLASS (preset));
|
|
is_child_proxy = GST_IS_CHILD_PROXY (preset);
|
|
|
|
/* for each of the property names, find the preset parameter and try to
|
|
* configure the property with its value */
|
|
for (i = 0; props[i]; i++) {
|
|
gchar *str;
|
|
GValue gvalue = { 0, };
|
|
GParamSpec *property = NULL;
|
|
|
|
/* check if we have a settings for this element property */
|
|
if (!(str = g_key_file_get_value (presets, name, props[i], NULL))) {
|
|
/* the element has a property but the parameter is not in the keyfile */
|
|
GST_INFO_OBJECT (preset, "parameter '%s' not in preset", props[i]);
|
|
continue;
|
|
}
|
|
|
|
GST_DEBUG_OBJECT (preset, "setting value '%s' for property '%s'", str,
|
|
props[i]);
|
|
|
|
if (is_child_proxy) {
|
|
gst_child_proxy_lookup ((GstChildProxy *) preset, props[i], NULL,
|
|
&property);
|
|
} else {
|
|
property = g_object_class_find_property (gclass, props[i]);
|
|
}
|
|
if (!property) {
|
|
/* the parameter was in the keyfile, the element said it supported it but
|
|
* then the property was not found in the element. This should not happen. */
|
|
GST_WARNING_OBJECT (preset, "property '%s' not in object", props[i]);
|
|
g_free (str);
|
|
continue;
|
|
}
|
|
|
|
/* try to deserialize the property value from the keyfile and set it as
|
|
* the object property */
|
|
g_value_init (&gvalue, property->value_type);
|
|
if (gst_value_deserialize (&gvalue, str)) {
|
|
if (is_child_proxy) {
|
|
gst_child_proxy_set_property ((GstChildProxy *) preset, props[i],
|
|
&gvalue);
|
|
} else {
|
|
g_object_set_property ((GObject *) preset, props[i], &gvalue);
|
|
}
|
|
} else {
|
|
GST_WARNING_OBJECT (preset,
|
|
"deserialization of value '%s' for property '%s' failed", str,
|
|
props[i]);
|
|
}
|
|
g_value_unset (&gvalue);
|
|
g_free (str);
|
|
}
|
|
g_strfreev (props);
|
|
|
|
return TRUE;
|
|
|
|
/* ERRORS */
|
|
no_presets:
|
|
{
|
|
GST_WARNING_OBJECT (preset, "no presets");
|
|
return FALSE;
|
|
}
|
|
no_group:
|
|
{
|
|
GST_WARNING_OBJECT (preset, "no preset named '%s'", name);
|
|
return FALSE;
|
|
}
|
|
no_properties:
|
|
{
|
|
GST_INFO_OBJECT (preset, "no properties");
|
|
return FALSE;
|
|
}
|
|
}
|
|
|
|
/* save the presets file. A copy of the existing presets file is stored in a
|
|
* .bak file */
|
|
static gboolean
|
|
gst_preset_default_save_presets_file (GstPreset * preset)
|
|
{
|
|
GKeyFile *presets;
|
|
const gchar *preset_path;
|
|
GError *error = NULL;
|
|
gchar *bak_file_name;
|
|
gboolean backup = TRUE;
|
|
gchar *data;
|
|
gsize data_size;
|
|
|
|
preset_get_paths (preset, &preset_path, NULL, NULL);
|
|
|
|
/* get the presets from the type */
|
|
if (!(presets = preset_get_keyfile (preset)))
|
|
goto no_presets;
|
|
|
|
GST_DEBUG_OBJECT (preset, "saving preset file: '%s'", preset_path);
|
|
|
|
/* create backup if possible */
|
|
bak_file_name = g_strdup_printf ("%s.bak", preset_path);
|
|
if (g_file_test (bak_file_name, G_FILE_TEST_EXISTS)) {
|
|
if (g_unlink (bak_file_name)) {
|
|
backup = FALSE;
|
|
GST_INFO_OBJECT (preset, "cannot remove old backup file : %s",
|
|
bak_file_name);
|
|
}
|
|
}
|
|
if (backup) {
|
|
if (g_rename (preset_path, bak_file_name)) {
|
|
GST_INFO_OBJECT (preset, "cannot backup file : %s -> %s", preset_path,
|
|
bak_file_name);
|
|
}
|
|
}
|
|
g_free (bak_file_name);
|
|
|
|
/* update gstreamer version */
|
|
g_key_file_set_string (presets, PRESET_HEADER, PRESET_HEADER_VERSION,
|
|
PACKAGE_VERSION);
|
|
|
|
/* get new contents, wee need this to save it */
|
|
if (!(data = g_key_file_to_data (presets, &data_size, &error)))
|
|
goto convert_failed;
|
|
|
|
/* write presets */
|
|
if (!g_file_set_contents (preset_path, data, data_size, &error))
|
|
goto write_failed;
|
|
|
|
g_free (data);
|
|
|
|
return TRUE;
|
|
|
|
/* ERRORS */
|
|
no_presets:
|
|
{
|
|
GST_WARNING_OBJECT (preset,
|
|
"no presets, trying to unlink possibly existing preset file: '%s'",
|
|
preset_path);
|
|
g_unlink (preset_path);
|
|
return FALSE;
|
|
}
|
|
convert_failed:
|
|
{
|
|
GST_WARNING_OBJECT (preset, "can not get the keyfile contents: %s",
|
|
error->message);
|
|
g_error_free (error);
|
|
g_free (data);
|
|
return FALSE;
|
|
}
|
|
write_failed:
|
|
{
|
|
GST_WARNING_OBJECT (preset, "Unable to store preset file %s: %s",
|
|
preset_path, error->message);
|
|
g_error_free (error);
|
|
g_free (data);
|
|
return FALSE;
|
|
}
|
|
}
|
|
|
|
/* save the preset with the given name */
|
|
static gboolean
|
|
gst_preset_default_save_preset (GstPreset * preset, const gchar * name)
|
|
{
|
|
GKeyFile *presets;
|
|
gchar **props;
|
|
guint i;
|
|
GObjectClass *gclass;
|
|
gboolean is_child_proxy;
|
|
|
|
GST_INFO_OBJECT (preset, "saving new preset: %s", name);
|
|
|
|
/* get the presets from the type */
|
|
if (!(presets = preset_get_keyfile (preset)))
|
|
goto no_presets;
|
|
|
|
/* take copies of current gobject properties from preset */
|
|
if (!(props = gst_preset_get_property_names (preset)))
|
|
goto no_properties;
|
|
|
|
gclass = G_OBJECT_CLASS (GST_ELEMENT_GET_CLASS (preset));
|
|
is_child_proxy = GST_IS_CHILD_PROXY (preset);
|
|
|
|
/* loop over the object properties and store the property value in the
|
|
* keyfile */
|
|
for (i = 0; props[i]; i++) {
|
|
GValue gvalue = { 0, };
|
|
gchar *str;
|
|
GParamSpec *property = NULL;
|
|
|
|
if (is_child_proxy) {
|
|
gst_child_proxy_lookup ((GstChildProxy *) preset, props[i], NULL,
|
|
&property);
|
|
} else {
|
|
property = g_object_class_find_property (gclass, props[i]);
|
|
}
|
|
if (!property) {
|
|
/* the element said it supported the property but then it does not have
|
|
* that property. This should not happen. */
|
|
GST_WARNING_OBJECT (preset, "property '%s' not in object", props[i]);
|
|
continue;
|
|
}
|
|
|
|
if (property->flags & G_PARAM_DEPRECATED) {
|
|
GST_INFO_OBJECT (preset, "Not saving property %s as it is deprecated",
|
|
property->name);
|
|
continue;
|
|
}
|
|
|
|
g_value_init (&gvalue, property->value_type);
|
|
if (is_child_proxy) {
|
|
gst_child_proxy_get_property ((GstChildProxy *) preset, props[i],
|
|
&gvalue);
|
|
} else {
|
|
g_object_get_property ((GObject *) preset, props[i], &gvalue);
|
|
}
|
|
|
|
if ((str = gst_value_serialize (&gvalue))) {
|
|
g_key_file_set_string (presets, name, props[i], (gpointer) str);
|
|
g_free (str);
|
|
} else {
|
|
GST_WARNING_OBJECT (preset, "serialization for property '%s' failed",
|
|
props[i]);
|
|
}
|
|
g_value_unset (&gvalue);
|
|
}
|
|
GST_INFO_OBJECT (preset, " saved");
|
|
g_strfreev (props);
|
|
|
|
/* save updated version */
|
|
return gst_preset_default_save_presets_file (preset);
|
|
|
|
/* ERRORS */
|
|
no_presets:
|
|
{
|
|
GST_WARNING_OBJECT (preset, "no presets");
|
|
return FALSE;
|
|
}
|
|
no_properties:
|
|
{
|
|
GST_INFO_OBJECT (preset, "no properties");
|
|
return FALSE;
|
|
}
|
|
}
|
|
|
|
/* copies all keys and comments from one group to another, deleting the old
|
|
* group. */
|
|
static gboolean
|
|
gst_preset_default_rename_preset (GstPreset * preset, const gchar * old_name,
|
|
const gchar * new_name)
|
|
{
|
|
GKeyFile *presets;
|
|
gchar *str;
|
|
gchar **keys;
|
|
gsize i, num_keys;
|
|
|
|
/* get the presets from the type */
|
|
if (!(presets = preset_get_keyfile (preset)))
|
|
goto no_presets;
|
|
|
|
if (!g_key_file_has_group (presets, old_name))
|
|
goto no_group;
|
|
|
|
/* copy group comment if there is any */
|
|
if ((str = g_key_file_get_comment (presets, old_name, NULL, NULL))) {
|
|
g_key_file_set_comment (presets, new_name, NULL, str, NULL);
|
|
g_free (str);
|
|
}
|
|
|
|
/* get all keys from the old group and copy them in the new group */
|
|
keys = g_key_file_get_keys (presets, old_name, &num_keys, NULL);
|
|
for (i = 0; i < num_keys; i++) {
|
|
/* copy key comment if there is any */
|
|
if ((str = g_key_file_get_comment (presets, old_name, keys[i], NULL))) {
|
|
g_key_file_set_comment (presets, new_name, keys[i], str, NULL);
|
|
g_free (str);
|
|
}
|
|
/* copy key value */
|
|
str = g_key_file_get_value (presets, old_name, keys[i], NULL);
|
|
g_key_file_set_value (presets, new_name, keys[i], str);
|
|
g_free (str);
|
|
}
|
|
g_strfreev (keys);
|
|
|
|
/* remove old group */
|
|
g_key_file_remove_group (presets, old_name, NULL);
|
|
|
|
/* save updated version */
|
|
return gst_preset_default_save_presets_file (preset);
|
|
|
|
/* ERRORS */
|
|
no_presets:
|
|
{
|
|
GST_WARNING_OBJECT (preset, "no presets");
|
|
return FALSE;
|
|
}
|
|
no_group:
|
|
{
|
|
GST_WARNING_OBJECT (preset, "no preset named %s", old_name);
|
|
return FALSE;
|
|
}
|
|
}
|
|
|
|
/* delete a group from the keyfile */
|
|
static gboolean
|
|
gst_preset_default_delete_preset (GstPreset * preset, const gchar * name)
|
|
{
|
|
GKeyFile *presets;
|
|
|
|
/* get the presets from the type */
|
|
if (!(presets = preset_get_keyfile (preset)))
|
|
goto no_presets;
|
|
|
|
/* get the group */
|
|
if (!g_key_file_has_group (presets, name))
|
|
goto no_group;
|
|
|
|
/* remove the group */
|
|
g_key_file_remove_group (presets, name, NULL);
|
|
|
|
/* save updated version */
|
|
return gst_preset_default_save_presets_file (preset);
|
|
|
|
/* ERRORS */
|
|
no_presets:
|
|
{
|
|
GST_WARNING_OBJECT (preset, "no presets");
|
|
return FALSE;
|
|
}
|
|
no_group:
|
|
{
|
|
GST_WARNING_OBJECT (preset, "no preset named %s", name);
|
|
return FALSE;
|
|
}
|
|
}
|
|
|
|
static gboolean
|
|
gst_preset_default_set_meta (GstPreset * preset, const gchar * name,
|
|
const gchar * tag, const gchar * value)
|
|
{
|
|
GKeyFile *presets;
|
|
gchar *key;
|
|
|
|
/* get the presets from the type */
|
|
if (!(presets = preset_get_keyfile (preset)))
|
|
goto no_presets;
|
|
|
|
key = g_strdup_printf ("_meta/%s", tag);
|
|
if (value && *value) {
|
|
g_key_file_set_value (presets, name, key, value);
|
|
} else {
|
|
g_key_file_remove_key (presets, name, key, NULL);
|
|
}
|
|
g_free (key);
|
|
|
|
/* save updated keyfile */
|
|
return gst_preset_default_save_presets_file (preset);
|
|
|
|
/* ERRORS */
|
|
no_presets:
|
|
{
|
|
GST_WARNING_OBJECT (preset, "no presets");
|
|
return FALSE;
|
|
}
|
|
}
|
|
|
|
/* the caller must free @value after usage */
|
|
static gboolean
|
|
gst_preset_default_get_meta (GstPreset * preset, const gchar * name,
|
|
const gchar * tag, gchar ** value)
|
|
{
|
|
GKeyFile *presets;
|
|
gchar *key;
|
|
|
|
/* get the presets from the type */
|
|
if (!(presets = preset_get_keyfile (preset)))
|
|
goto no_presets;
|
|
|
|
key = g_strdup_printf ("_meta/%s", tag);
|
|
*value = g_key_file_get_value (presets, name, key, NULL);
|
|
g_free (key);
|
|
|
|
return TRUE;
|
|
|
|
/* ERRORS */
|
|
no_presets:
|
|
{
|
|
GST_WARNING_OBJECT (preset, "no presets");
|
|
*value = NULL;
|
|
return FALSE;
|
|
}
|
|
}
|
|
|
|
/* wrapper */
|
|
|
|
/**
|
|
* gst_preset_get_preset_names:
|
|
* @preset: a #GObject that implements #GstPreset
|
|
*
|
|
* Get a copy of preset names as a %NULL terminated string array.
|
|
*
|
|
* Returns: (transfer full) (array zero-terminated=1) (element-type gchar*):
|
|
* list with names, use g_strfreev() after usage.
|
|
*/
|
|
gchar **
|
|
gst_preset_get_preset_names (GstPreset * preset)
|
|
{
|
|
g_return_val_if_fail (GST_IS_PRESET (preset), NULL);
|
|
|
|
return (GST_PRESET_GET_INTERFACE (preset)->get_preset_names (preset));
|
|
}
|
|
|
|
/**
|
|
* gst_preset_get_property_names:
|
|
* @preset: a #GObject that implements #GstPreset
|
|
*
|
|
* Get a the names of the GObject properties that can be used for presets.
|
|
*
|
|
* Returns: (transfer full) (array zero-terminated=1) (element-type gchar*): an
|
|
* array of property names which should be freed with g_strfreev() after use.
|
|
*/
|
|
gchar **
|
|
gst_preset_get_property_names (GstPreset * preset)
|
|
{
|
|
g_return_val_if_fail (GST_IS_PRESET (preset), NULL);
|
|
|
|
return (GST_PRESET_GET_INTERFACE (preset)->get_property_names (preset));
|
|
}
|
|
|
|
/**
|
|
* gst_preset_load_preset:
|
|
* @preset: a #GObject that implements #GstPreset
|
|
* @name: preset name to load
|
|
*
|
|
* Load the given preset.
|
|
*
|
|
* Returns: %TRUE for success, %FALSE if e.g. there is no preset with that @name
|
|
*/
|
|
gboolean
|
|
gst_preset_load_preset (GstPreset * preset, const gchar * name)
|
|
{
|
|
g_return_val_if_fail (GST_IS_PRESET (preset), FALSE);
|
|
g_return_val_if_fail (name, FALSE);
|
|
|
|
return (GST_PRESET_GET_INTERFACE (preset)->load_preset (preset, name));
|
|
}
|
|
|
|
/**
|
|
* gst_preset_save_preset:
|
|
* @preset: a #GObject that implements #GstPreset
|
|
* @name: preset name to save
|
|
*
|
|
* Save the current object settings as a preset under the given name. If there
|
|
* is already a preset by this @name it will be overwritten.
|
|
*
|
|
* Returns: %TRUE for success, %FALSE
|
|
*/
|
|
gboolean
|
|
gst_preset_save_preset (GstPreset * preset, const gchar * name)
|
|
{
|
|
g_return_val_if_fail (GST_IS_PRESET (preset), FALSE);
|
|
g_return_val_if_fail (name, FALSE);
|
|
|
|
return (GST_PRESET_GET_INTERFACE (preset)->save_preset (preset, name));
|
|
}
|
|
|
|
/**
|
|
* gst_preset_rename_preset:
|
|
* @preset: a #GObject that implements #GstPreset
|
|
* @old_name: current preset name
|
|
* @new_name: new preset name
|
|
*
|
|
* Renames a preset. If there is already a preset by the @new_name it will be
|
|
* overwritten.
|
|
*
|
|
* Returns: %TRUE for success, %FALSE if e.g. there is no preset with @old_name
|
|
*/
|
|
gboolean
|
|
gst_preset_rename_preset (GstPreset * preset, const gchar * old_name,
|
|
const gchar * new_name)
|
|
{
|
|
g_return_val_if_fail (GST_IS_PRESET (preset), FALSE);
|
|
g_return_val_if_fail (old_name, FALSE);
|
|
g_return_val_if_fail (new_name, FALSE);
|
|
|
|
return (GST_PRESET_GET_INTERFACE (preset)->rename_preset (preset, old_name,
|
|
new_name));
|
|
}
|
|
|
|
/**
|
|
* gst_preset_delete_preset:
|
|
* @preset: a #GObject that implements #GstPreset
|
|
* @name: preset name to remove
|
|
*
|
|
* Delete the given preset.
|
|
*
|
|
* Returns: %TRUE for success, %FALSE if e.g. there is no preset with that @name
|
|
*/
|
|
gboolean
|
|
gst_preset_delete_preset (GstPreset * preset, const gchar * name)
|
|
{
|
|
g_return_val_if_fail (GST_IS_PRESET (preset), FALSE);
|
|
g_return_val_if_fail (name, FALSE);
|
|
|
|
return (GST_PRESET_GET_INTERFACE (preset)->delete_preset (preset, name));
|
|
}
|
|
|
|
/**
|
|
* gst_preset_set_meta:
|
|
* @preset: a #GObject that implements #GstPreset
|
|
* @name: preset name
|
|
* @tag: meta data item name
|
|
* @value: (allow-none): new value
|
|
*
|
|
* Sets a new @value for an existing meta data item or adds a new item. Meta
|
|
* data @tag names can be something like e.g. "comment". Supplying %NULL for the
|
|
* @value will unset an existing value.
|
|
*
|
|
* Returns: %TRUE for success, %FALSE if e.g. there is no preset with that @name
|
|
*/
|
|
gboolean
|
|
gst_preset_set_meta (GstPreset * preset, const gchar * name, const gchar * tag,
|
|
const gchar * value)
|
|
{
|
|
g_return_val_if_fail (GST_IS_PRESET (preset), FALSE);
|
|
g_return_val_if_fail (name, FALSE);
|
|
g_return_val_if_fail (tag, FALSE);
|
|
|
|
return GST_PRESET_GET_INTERFACE (preset)->set_meta (preset, name, tag, value);
|
|
}
|
|
|
|
/**
|
|
* gst_preset_get_meta:
|
|
* @preset: a #GObject that implements #GstPreset
|
|
* @name: preset name
|
|
* @tag: meta data item name
|
|
* @value: (out callee-allocates): value
|
|
*
|
|
* Gets the @value for an existing meta data @tag. Meta data @tag names can be
|
|
* something like e.g. "comment". Returned values need to be released when done.
|
|
*
|
|
* Returns: %TRUE for success, %FALSE if e.g. there is no preset with that @name
|
|
* or no value for the given @tag
|
|
*/
|
|
gboolean
|
|
gst_preset_get_meta (GstPreset * preset, const gchar * name, const gchar * tag,
|
|
gchar ** value)
|
|
{
|
|
g_return_val_if_fail (GST_IS_PRESET (preset), FALSE);
|
|
g_return_val_if_fail (name, FALSE);
|
|
g_return_val_if_fail (tag, FALSE);
|
|
g_return_val_if_fail (value, FALSE);
|
|
|
|
return GST_PRESET_GET_INTERFACE (preset)->get_meta (preset, name, tag, value);
|
|
}
|
|
|
|
/**
|
|
* gst_preset_set_app_dir:
|
|
* @app_dir: (type filename): the application specific preset dir
|
|
*
|
|
* Sets an extra directory as an absolute path that should be considered when
|
|
* looking for presets. Any presets in the application dir will shadow the
|
|
* system presets.
|
|
*
|
|
* Returns: %TRUE for success, %FALSE if the dir already has been set
|
|
*/
|
|
gboolean
|
|
gst_preset_set_app_dir (const gchar * app_dir)
|
|
{
|
|
g_return_val_if_fail (app_dir, FALSE);
|
|
|
|
if (!preset_app_dir) {
|
|
preset_app_dir = g_strdup (app_dir);
|
|
return TRUE;
|
|
}
|
|
return FALSE;
|
|
}
|
|
|
|
/**
|
|
* gst_preset_get_app_dir:
|
|
*
|
|
* Gets the directory for application specific presets if set by the
|
|
* application.
|
|
*
|
|
* Returns: (nullable) (type filename): the directory or %NULL, don't free or modify
|
|
* the string
|
|
*/
|
|
const gchar *
|
|
gst_preset_get_app_dir (void)
|
|
{
|
|
return preset_app_dir;
|
|
}
|
|
|
|
/**
|
|
* gst_preset_is_editable:
|
|
* @preset: a #GObject that implements #GstPreset
|
|
*
|
|
* Check if one can add new presets, change existing ones and remove presets.
|
|
*
|
|
* Returns: %TRUE if presets are editable or %FALSE if they are static
|
|
*
|
|
* Since: 1.6
|
|
*/
|
|
gboolean
|
|
gst_preset_is_editable (GstPreset * preset)
|
|
{
|
|
GstPresetInterface *iface = GST_PRESET_GET_INTERFACE (preset);
|
|
|
|
return iface->save_preset && iface->delete_preset;
|
|
}
|
|
|
|
/* class internals */
|
|
|
|
static void
|
|
gst_preset_class_init (GstPresetInterface * iface)
|
|
{
|
|
iface->get_preset_names = gst_preset_default_get_preset_names;
|
|
iface->get_property_names = gst_preset_default_get_property_names;
|
|
|
|
iface->load_preset = gst_preset_default_load_preset;
|
|
iface->save_preset = gst_preset_default_save_preset;
|
|
iface->rename_preset = gst_preset_default_rename_preset;
|
|
iface->delete_preset = gst_preset_default_delete_preset;
|
|
|
|
iface->set_meta = gst_preset_default_set_meta;
|
|
iface->get_meta = gst_preset_default_get_meta;
|
|
}
|
|
|
|
static void
|
|
gst_preset_base_init (gpointer g_class)
|
|
{
|
|
static gboolean initialized = FALSE;
|
|
|
|
if (!initialized) {
|
|
/* init default implementation */
|
|
GST_DEBUG_CATEGORY_INIT (GST_CAT_DEFAULT, "preset",
|
|
GST_DEBUG_FG_WHITE | GST_DEBUG_BG_BLACK, "preset interface");
|
|
|
|
/* create quarks for use with g_type_{g,s}et_qdata() */
|
|
preset_quark = g_quark_from_static_string ("GstPreset::presets");
|
|
preset_user_path_quark =
|
|
g_quark_from_static_string ("GstPreset::user_path");
|
|
preset_app_path_quark = g_quark_from_static_string ("GstPreset::app_path");
|
|
preset_system_path_quark =
|
|
g_quark_from_static_string ("GstPreset::system_path");
|
|
|
|
#if 0
|
|
/* create interface properties, each element would need to override this
|
|
* g_object_class_override_property(gobject_class, PROP_PRESET_NAME, "preset-name");
|
|
* and in _set_property() do
|
|
* case PROP_PRESET_NAME: {
|
|
* gchar *name = g_value_get_string (value);
|
|
* if (name)
|
|
* gst_preset_load_preset(preset, name);
|
|
* } break;
|
|
*/
|
|
g_object_interface_install_property (g_class,
|
|
g_param_spec_string ("preset-name",
|
|
"preset-name property",
|
|
"load given preset", NULL, G_PARAM_WRITABLE));
|
|
#endif
|
|
|
|
initialized = TRUE;
|
|
}
|
|
}
|
|
|
|
GType
|
|
gst_preset_get_type (void)
|
|
{
|
|
static volatile gsize type = 0;
|
|
|
|
if (g_once_init_enter (&type)) {
|
|
GType _type;
|
|
const GTypeInfo info = {
|
|
sizeof (GstPresetInterface),
|
|
(GBaseInitFunc) gst_preset_base_init, /* base_init */
|
|
NULL, /* base_finalize */
|
|
(GClassInitFunc) gst_preset_class_init, /* class_init */
|
|
NULL, /* class_finalize */
|
|
NULL, /* class_data */
|
|
0,
|
|
0, /* n_preallocs */
|
|
NULL /* instance_init */
|
|
};
|
|
_type = g_type_register_static (G_TYPE_INTERFACE, "GstPreset", &info, 0);
|
|
g_once_init_leave (&type, _type);
|
|
}
|
|
return type;
|
|
}
|