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771 lines
27 KiB
C
771 lines
27 KiB
C
/* GStreamer base utils library plugin install support for applications
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* Copyright (C) 2007 Tim-Philipp Müller <tim centricular net>
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* Copyright (C) 2006 Ryan Lortie <desrt desrt ca>
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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:gstpbutilsinstallplugins
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* @title: Install-plugins
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* @short_description: Missing plugin installation support for applications
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*
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* ## Overview
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*
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* Using this API, applications can request the installation of missing
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* GStreamer plugins. These may be missing decoders/demuxers or
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* encoders/muxers for a certain format, sources or sinks for a certain URI
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* protocol (e.g. 'http'), or certain elements known by their element
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* factory name ('audioresample').
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*
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* Whether plugin installation is supported or not depends on the operating
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* system and/or distribution in question. The vendor of the operating
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* system needs to make sure the necessary hooks and mechanisms are in
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* place for plugin installation to work. See below for more detailed
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* information.
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*
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* From the application perspective, plugin installation is usually
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* triggered either
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*
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* - when the application itself has found that it wants or needs to
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* install a certain element
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* - when the application has been notified by an element (such as
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* playbin or decodebin) that one or more plugins are missing *and* the
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* application has decided that it wants to install one or more of
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* those missing plugins
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*
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* The install functions in this section all take one or more 'detail
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* strings'. These detail strings contain information about the type of
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* plugin that needs to be installed (decoder, encoder, source, sink, or
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* named element), and some additional information such GStreamer version
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* used and a human-readable description of the component to install for
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* user dialogs.
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*
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* Applications should not concern themselves with the composition of the
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* string itself. They should regard the string as if it was a shared
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* secret between GStreamer and the plugin installer application.
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*
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* Detail strings can be obtained using the function
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* gst_missing_plugin_message_get_installer_detail() on a
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* missing-plugin message. Such a message will either have been found by
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* the application on a pipeline's #GstBus, or the application will have
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* created it itself using gst_missing_element_message_new(),
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* gst_missing_decoder_message_new(),
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* gst_missing_encoder_message_new(),
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* gst_missing_uri_sink_message_new(), or
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* gst_missing_uri_source_message_new().
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*
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* For each GStreamer element/plugin/component that should be installed,
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* the application needs one of those 'installer detail' string mentioned
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* in the previous section. This string can be obtained, as already
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* mentioned above, from a missing-plugin message using the function
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* gst_missing_plugin_message_get_installer_detail(). The
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* missing-plugin message is either posted by another element and then
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* found on the bus by the application, or the application has created it
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* itself as described above.
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*
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* The application will then call gst_install_plugins_async(), passing a
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* NULL-terminated array of installer detail strings, and a function that
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* should be called when the installation of the plugins has finished
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* (successfully or not). Optionally, a #GstInstallPluginsContext created
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* with gst_install_plugins_context_new() may be passed as well. This
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* way additional optional arguments like the application window's XID can
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* be passed to the external installer application.
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*
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* gst_install_plugins_async() will return almost immediately, with the
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* return code indicating whether plugin installation was started or not.
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* If the necessary hooks for plugin installation are in place and an
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* external installer application has in fact been called, the passed in
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* function will be called with a result code as soon as the external
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* installer has finished. If the result code indicates that new plugins
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* have been installed, the application will want to call
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* gst_update_registry() so the run-time plugin registry is updated and
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* the new plugins are made available to the application.
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*
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* > A Gtk/GLib main loop must be running in order for the result function
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* > to be called when the external installer has finished. If this is not
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* > the case, make sure to regularly call in your code:
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* >
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* > g_main_context_iteration (NULL,FALSE);
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*
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* ## 1. Installer hook
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*
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* When GStreamer applications initiate plugin installation via
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* gst_install_plugins_async() or gst_install_plugins_sync(), a
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* pre-defined helper application will be called.
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*
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* The exact path of the helper application to be called is set at compile
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* time, usually by the `./configure` script based on the install prefix.
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* For a normal package build into the `/usr` prefix, this will usually
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* default to `/usr/libexec/gst-install-plugins-helper` or
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* `/usr/lib/gst-install-plugins-helper`.
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*
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* Vendors/distros who want to support GStreamer plugin installation should
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* either provide such a helper script/application or use the `./configure`
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* option `--with-install-plugins-helper=/path/to/installer` to make
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* GStreamer call an installer of their own directly.
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*
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* It is strongly recommended that vendors provide a small helper
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* application as interlocutor to the real installer though, even more so
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* if command line argument munging is required to transform the command
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* line arguments passed by GStreamer to the helper application into
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* arguments that are understood by the real installer.
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*
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* The helper application path defined at compile time can be overriden at
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* runtime by setting the GST_INSTALL_PLUGINS_HELPER environment
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* variable. This can be useful for testing/debugging purposes.
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*
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* ## 2. Arguments passed to the install helper
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*
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* GStreamer will pass the following arguments to the install helper (this
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* is in addition to the path of the executable itself, which is by
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* convention argv[0]):
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*
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* - none to many optional arguments in the form of `--foo-bar=val`.
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* Example: `--transient-for=XID` where XID is the X Window ID of the
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* main window of the calling application (so the installer can make
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* itself transient to that window). Unknown optional arguments should
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* be ignored by the installer.
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*
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* - one 'installer detail string' argument for each plugin to be
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* installed; these strings will have a `gstreamer` prefix; the exact
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* format of the detail string is explained below
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*
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* ## 3. Detail string describing the missing plugin
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*
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* The string is in UTF-8 encoding and is made up of several fields,
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* separated by '|' characters (but neither the first nor the last
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* character is a '|'). The fields are:
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*
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* - plugin system identifier, ie. "gstreamer"
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* This identifier determines the format of the rest of the detail
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* string. Automatic plugin installers should not process detail
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* strings with unknown identifiers. This allows other plugin-based
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* libraries to use the same mechanism for their automatic plugin
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* installation needs, or for the format to be changed should it turn
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* out to be insufficient.
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* - plugin system version, e.g. "0.10"
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* This is required so that when there is a GStreamer-0.12 or
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* GStreamer-1.0 at some point in future, the different major versions
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* can still co-exist and use the same plugin install mechanism in the
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* same way.
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* - application identifier, e.g. "totem"
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* This may also be in the form of "pid/12345" if the program name
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* can't be obtained for some reason.
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* - human-readable localised description of the required component, e.g.
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* "Vorbis audio decoder"
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* - identifier string for the required component (see below for details
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* about how to map this to the package/plugin that needs installing),
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* e.g.
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* - urisource-$(PROTOCOL_REQUIRED), e.g. urisource-http or
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* urisource-mms
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* - element-$(ELEMENT_REQUIRED), e.g. element-videoconvert
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* - decoder-$(CAPS_REQUIRED), e.g. (do read below for more
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* details!):
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* - decoder-audio/x-vorbis
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* - decoder-application/ogg
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* - decoder-audio/mpeg, mpegversion=(int)4
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* - decoder-video/mpeg, systemstream=(boolean)true,
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* mpegversion=(int)2
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* - encoder-$(CAPS_REQUIRED), e.g. encoder-audio/x-vorbis
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* - optional further fields not yet specified
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*
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* An entire ID string might then look like this, for example: `
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* gstreamer|0.10|totem|Vorbis audio decoder|decoder-audio/x-vorbis`
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*
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* Plugin installers parsing this ID string should expect further fields
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* also separated by '|' symbols and either ignore them, warn the user, or
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* error out when encountering them.
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*
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* Those unfamiliar with the GStreamer 'caps' system should note a few
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* things about the caps string used in the above decoder/encoder case:
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*
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* - the first part ("video/mpeg") of the caps string is a GStreamer
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* media type and *not* a MIME type. Wherever possible, the GStreamer
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* media type will be the same as the corresponding MIME type, but
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* often it is not.
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* - a caps string may or may not have additional comma-separated fields
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* of various types (as seen in the examples above)
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* - the caps string of a 'required' component (as above) will always
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* have fields with fixed values, whereas an introspected string (see
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* below) may have fields with non-fixed values. Compare for example:
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* - `audio/mpeg, mpegversion=(int)4` vs.
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* `audio/mpeg, mpegversion=(int){2, 4}`
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* - `video/mpeg, mpegversion=(int)2` vs.
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* `video/mpeg, systemstream=(boolean){ true, false}, mpegversion=(int)[1, 2]`
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*
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* ## 4. Exit codes the installer should return
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*
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* The installer should return one of the following exit codes when it
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* exits:
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*
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* - 0 if all of the requested plugins could be installed
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* (#GST_INSTALL_PLUGINS_SUCCESS)
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* - 1 if no appropriate installation candidate for any of the requested
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* plugins could be found. Only return this if nothing has been
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* installed (#GST_INSTALL_PLUGINS_NOT_FOUND)
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* - 2 if an error occured during the installation. The application will
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* assume that the user will already have seen an error message by the
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* installer in this case and will usually not show another one
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* (#GST_INSTALL_PLUGINS_ERROR)
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* - 3 if some of the requested plugins could be installed, but not all
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* (#GST_INSTALL_PLUGINS_PARTIAL_SUCCESS)
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* - 4 if the user aborted the installation
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* (#GST_INSTALL_PLUGINS_USER_ABORT)
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*
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* ## 5. How to map the required detail string to packages
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*
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* It is up to the vendor to find mechanism to map required components from
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* the detail string to the actual packages/plugins to install. This could
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* be a hardcoded list of mappings, for example, or be part of the
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* packaging system metadata.
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*
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* GStreamer plugin files can be introspected for this information. The
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* `gst-inspect` utility has a special command line option that will output
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* information similar to what is required. For example `
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* $ gst-inspect-1.0 --print-plugin-auto-install-info /path/to/libgstvorbis.so
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* should output something along the lines of
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* `decoder-audio/x-vorbis`, `element-vorbisdec` `element-vorbisenc`
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* `element-vorbisparse`, `element-vorbistag`, `encoder-audio/x-vorbis`
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*
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* Note that in the encoder and decoder case the introspected caps can be
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* more complex with additional fields, e.g.
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* `audio/mpeg,mpegversion=(int){2,4}`, so they will not always exactly
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* match the caps wanted by the application. It is up to the installer to
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* deal with this (either by doing proper caps intersection using the
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* GStreamer #GstCaps API, or by only taking into account the media type).
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*
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* Another potential source of problems are plugins such as ladspa or
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* libvisual where the list of elements depends on the installed
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* ladspa/libvisual plugins at the time. This is also up to the
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* distribution to handle (but usually not relevant for playback
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* applications).
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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 "install-plugins.h"
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#include <gst/gstinfo.h>
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#ifdef HAVE_SYS_TYPES_H
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#include <sys/types.h>
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#endif
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#ifdef HAVE_SYS_WAIT_H
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#include <sys/wait.h>
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#endif
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#include <string.h>
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/* best effort to make things compile and possibly even work on win32 */
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#ifndef WEXITSTATUS
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# define WEXITSTATUS(status) ((((guint)(status)) & 0xff00) >> 8)
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#endif
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#ifndef WIFEXITED
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# define WIFEXITED(status) ((((guint)(status)) & 0x7f) == 0)
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#endif
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static gboolean install_in_progress; /* FALSE */
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/* private struct */
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struct _GstInstallPluginsContext
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{
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gchar *confirm_search;
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gchar *desktop_id;
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gchar *startup_notification_id;
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guint xid;
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};
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/**
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* gst_install_plugins_context_set_confirm_search:
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* @ctx: a #GstInstallPluginsContext
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* @confirm_search: whether to ask for confirmation before searching for plugins
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*
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* This function is used to tell the external installer process whether it
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* should ask for confirmation or not before searching for missing plugins.
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*
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* If set, this option will be passed to the installer via a
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* --interaction=[show-confirm-search|hide-confirm-search] command line option.
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*
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* Since: 1.6
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*/
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void
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gst_install_plugins_context_set_confirm_search (GstInstallPluginsContext * ctx,
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gboolean confirm_search)
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{
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g_return_if_fail (ctx != NULL);
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if (confirm_search)
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ctx->confirm_search = g_strdup ("show-confirm-search");
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else
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ctx->confirm_search = g_strdup ("hide-confirm-search");
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}
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/**
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* gst_install_plugins_context_set_desktop_id:
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* @ctx: a #GstInstallPluginsContext
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* @desktop_id: the desktop file ID of the calling application
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*
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* This function is used to pass the calling application's desktop file ID to
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* the external installer process.
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*
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* A desktop file ID is the basename of the desktop file, including the
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* .desktop extension.
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*
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* If set, the desktop file ID will be passed to the installer via a
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* --desktop-id= command line option.
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*
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* Since: 1.6
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*/
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void
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gst_install_plugins_context_set_desktop_id (GstInstallPluginsContext * ctx,
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const gchar * desktop_id)
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{
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g_return_if_fail (ctx != NULL);
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ctx->desktop_id = g_strdup (desktop_id);
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}
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/**
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* gst_install_plugins_context_set_startup_notification_id:
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* @ctx: a #GstInstallPluginsContext
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* @startup_id: the startup notification ID
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*
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* Sets the startup notification ID for the launched process.
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*
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* This is typically used to to pass the current X11 event timestamp to the
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* external installer process.
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*
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* Startup notification IDs are defined in the
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* [FreeDesktop.Org Startup Notifications standard](http://standards.freedesktop.org/startup-notification-spec/startup-notification-latest.txt).
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*
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* If set, the ID will be passed to the installer via a
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* --startup-notification-id= command line option.
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*
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* GTK+/GNOME applications should be able to create a startup notification ID
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* like this:
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* |[
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* timestamp = gtk_get_current_event_time ();
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* startup_id = g_strdup_printf ("_TIME%u", timestamp);
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* ...
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* ]|
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*
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* Since: 1.6
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*/
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void gst_install_plugins_context_set_startup_notification_id
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(GstInstallPluginsContext * ctx, const gchar * startup_id)
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{
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g_return_if_fail (ctx != NULL);
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ctx->startup_notification_id = g_strdup (startup_id);
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}
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/**
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* gst_install_plugins_context_set_xid:
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* @ctx: a #GstInstallPluginsContext
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* @xid: the XWindow ID (XID) of the top-level application
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*
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* This function is for X11-based applications (such as most Gtk/Qt
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* applications on linux/unix) only. You can use it to tell the external
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* installer the XID of your main application window. That way the installer
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* can make its own window transient to your application window during the
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* installation.
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*
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* If set, the XID will be passed to the installer via a --transient-for=XID
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* command line option.
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*
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* Gtk+/Gnome application should be able to obtain the XID of the top-level
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* window like this:
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* |[
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* ##include <gtk/gtk.h>
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* ##ifdef GDK_WINDOWING_X11
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* ##include <gdk/gdkx.h>
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* ##endif
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* ...
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* ##ifdef GDK_WINDOWING_X11
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* xid = GDK_WINDOW_XWINDOW (GTK_WIDGET (application_window)->window);
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* ##endif
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* ...
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* ]|
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*
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*/
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void
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gst_install_plugins_context_set_xid (GstInstallPluginsContext * ctx, guint xid)
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{
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g_return_if_fail (ctx != NULL);
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ctx->xid = xid;
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}
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/**
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* gst_install_plugins_context_new:
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*
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* Creates a new #GstInstallPluginsContext.
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*
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* Returns: a new #GstInstallPluginsContext. Free with
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* gst_install_plugins_context_free() when no longer needed
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*/
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GstInstallPluginsContext *
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gst_install_plugins_context_new (void)
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{
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return g_new0 (GstInstallPluginsContext, 1);
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}
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/**
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* gst_install_plugins_context_free:
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* @ctx: a #GstInstallPluginsContext
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*
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* Frees a #GstInstallPluginsContext.
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*/
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void
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gst_install_plugins_context_free (GstInstallPluginsContext * ctx)
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{
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g_return_if_fail (ctx != NULL);
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g_free (ctx->confirm_search);
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g_free (ctx->desktop_id);
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g_free (ctx->startup_notification_id);
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g_free (ctx);
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}
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GstInstallPluginsContext *
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gst_install_plugins_context_copy (GstInstallPluginsContext * ctx)
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{
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GstInstallPluginsContext *ret;
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ret = gst_install_plugins_context_new ();
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ret->confirm_search = g_strdup (ctx->confirm_search);
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ret->desktop_id = g_strdup (ctx->desktop_id);
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ret->startup_notification_id = g_strdup (ctx->startup_notification_id);
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ret->xid = ctx->xid;
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|
return ret;
|
|
}
|
|
|
|
G_DEFINE_BOXED_TYPE (GstInstallPluginsContext, gst_install_plugins_context,
|
|
(GBoxedCopyFunc) gst_install_plugins_context_copy,
|
|
(GBoxedFreeFunc) gst_install_plugins_context_free);
|
|
|
|
static const gchar *
|
|
gst_install_plugins_get_helper (void)
|
|
{
|
|
const gchar *helper;
|
|
|
|
helper = g_getenv ("GST_INSTALL_PLUGINS_HELPER");
|
|
if (helper == NULL)
|
|
helper = GST_INSTALL_PLUGINS_HELPER;
|
|
|
|
GST_LOG ("Using plugin install helper '%s'", helper);
|
|
return helper;
|
|
}
|
|
|
|
static gboolean
|
|
ptr_array_contains_string (GPtrArray * arr, const gchar * s)
|
|
{
|
|
gint i;
|
|
|
|
for (i = 0; i < arr->len; ++i) {
|
|
if (strcmp ((const char *) g_ptr_array_index (arr, i), s) == 0)
|
|
return TRUE;
|
|
}
|
|
return FALSE;
|
|
}
|
|
|
|
static gboolean
|
|
gst_install_plugins_spawn_child (const gchar * const *details,
|
|
GstInstallPluginsContext * ctx, GPid * child_pid, gint * exit_status)
|
|
{
|
|
GPtrArray *arr;
|
|
gboolean ret;
|
|
GError *err = NULL;
|
|
gchar **argv;
|
|
|
|
arr = g_ptr_array_new_with_free_func (g_free);
|
|
|
|
/* argv[0] = helper path */
|
|
g_ptr_array_add (arr, g_strdup (gst_install_plugins_get_helper ()));
|
|
|
|
/* add any additional command line args from the context */
|
|
if (ctx != NULL && ctx->confirm_search) {
|
|
g_ptr_array_add (arr, g_strdup_printf ("--interaction=%s",
|
|
ctx->confirm_search));
|
|
}
|
|
if (ctx != NULL && ctx->desktop_id != NULL) {
|
|
g_ptr_array_add (arr, g_strdup_printf ("--desktop-id=%s", ctx->desktop_id));
|
|
}
|
|
if (ctx != NULL && ctx->startup_notification_id != NULL) {
|
|
g_ptr_array_add (arr, g_strdup_printf ("--startup-notification-id=%s",
|
|
ctx->startup_notification_id));
|
|
}
|
|
if (ctx != NULL && ctx->xid != 0) {
|
|
g_ptr_array_add (arr, g_strdup_printf ("--transient-for=%u", ctx->xid));
|
|
}
|
|
|
|
/* finally, add the detail strings, but without duplicates */
|
|
while (details != NULL && details[0] != NULL) {
|
|
if (!ptr_array_contains_string (arr, details[0]))
|
|
g_ptr_array_add (arr, g_strdup (details[0]));
|
|
++details;
|
|
}
|
|
|
|
/* and NULL-terminate */
|
|
g_ptr_array_add (arr, NULL);
|
|
|
|
argv = (gchar **) arr->pdata;
|
|
|
|
if (child_pid == NULL && exit_status != NULL) {
|
|
install_in_progress = TRUE;
|
|
ret = g_spawn_sync (NULL, argv, NULL, (GSpawnFlags) 0, NULL, NULL,
|
|
NULL, NULL, exit_status, &err);
|
|
install_in_progress = FALSE;
|
|
} else if (child_pid != NULL && exit_status == NULL) {
|
|
install_in_progress = TRUE;
|
|
ret = g_spawn_async (NULL, argv, NULL, G_SPAWN_DO_NOT_REAP_CHILD, NULL,
|
|
NULL, child_pid, &err);
|
|
} else {
|
|
g_return_val_if_reached (FALSE);
|
|
}
|
|
|
|
if (!ret) {
|
|
GST_ERROR ("Error spawning plugin install helper: %s", err->message);
|
|
g_error_free (err);
|
|
}
|
|
|
|
g_ptr_array_unref (arr);
|
|
return ret;
|
|
}
|
|
|
|
static GstInstallPluginsReturn
|
|
gst_install_plugins_return_from_status (gint status)
|
|
{
|
|
GstInstallPluginsReturn ret;
|
|
|
|
/* did we exit cleanly? */
|
|
if (!WIFEXITED (status)) {
|
|
ret = GST_INSTALL_PLUGINS_CRASHED;
|
|
} else {
|
|
ret = (GstInstallPluginsReturn) WEXITSTATUS (status);
|
|
|
|
/* did the helper return an invalid status code? */
|
|
if (((guint) ret) >= GST_INSTALL_PLUGINS_STARTED_OK &&
|
|
ret != GST_INSTALL_PLUGINS_INTERNAL_FAILURE) {
|
|
ret = GST_INSTALL_PLUGINS_INVALID;
|
|
}
|
|
}
|
|
|
|
GST_LOG ("plugin installer exited with status 0x%04x = %s", status,
|
|
gst_install_plugins_return_get_name (ret));
|
|
|
|
return ret;
|
|
}
|
|
|
|
typedef struct
|
|
{
|
|
GstInstallPluginsResultFunc func;
|
|
gpointer user_data;
|
|
} GstInstallPluginsAsyncHelper;
|
|
|
|
static void
|
|
gst_install_plugins_installer_exited (GPid pid, gint status, gpointer data)
|
|
{
|
|
GstInstallPluginsAsyncHelper *helper;
|
|
GstInstallPluginsReturn ret;
|
|
|
|
install_in_progress = FALSE;
|
|
|
|
helper = (GstInstallPluginsAsyncHelper *) data;
|
|
ret = gst_install_plugins_return_from_status (status);
|
|
|
|
GST_LOG ("calling plugin install result function %p", helper->func);
|
|
helper->func (ret, helper->user_data);
|
|
|
|
g_free (helper);
|
|
}
|
|
|
|
/**
|
|
* gst_install_plugins_async:
|
|
* @details: (array zero-terminated=1) (transfer none): NULL-terminated array
|
|
* of installer string details (see below)
|
|
* @ctx: (allow-none): a #GstInstallPluginsContext, or NULL
|
|
* @func: (scope async): the function to call when the installer program returns
|
|
* @user_data: (closure): the user data to pass to @func when called, or NULL
|
|
*
|
|
* Requests plugin installation without blocking. Once the plugins have been
|
|
* installed or installation has failed, @func will be called with the result
|
|
* of the installation and your provided @user_data pointer.
|
|
*
|
|
* This function requires a running GLib/Gtk main loop. If you are not
|
|
* running a GLib/Gtk main loop, make sure to regularly call
|
|
* g_main_context_iteration(NULL,FALSE).
|
|
*
|
|
* The installer strings that make up @detail are typically obtained by
|
|
* calling gst_missing_plugin_message_get_installer_detail() on missing-plugin
|
|
* messages that have been caught on a pipeline's bus or created by the
|
|
* application via the provided API, such as gst_missing_element_message_new().
|
|
*
|
|
* It is possible to request the installation of multiple missing plugins in
|
|
* one go (as might be required if there is a demuxer for a certain format
|
|
* installed but no suitable video decoder and no suitable audio decoder).
|
|
*
|
|
* Returns: result code whether an external installer could be started
|
|
*/
|
|
|
|
GstInstallPluginsReturn
|
|
gst_install_plugins_async (const gchar * const *details,
|
|
GstInstallPluginsContext * ctx, GstInstallPluginsResultFunc func,
|
|
gpointer user_data)
|
|
{
|
|
GstInstallPluginsAsyncHelper *helper;
|
|
GPid pid;
|
|
|
|
g_return_val_if_fail (details != NULL, GST_INSTALL_PLUGINS_INTERNAL_FAILURE);
|
|
g_return_val_if_fail (func != NULL, GST_INSTALL_PLUGINS_INTERNAL_FAILURE);
|
|
|
|
if (install_in_progress)
|
|
return GST_INSTALL_PLUGINS_INSTALL_IN_PROGRESS;
|
|
|
|
/* if we can't access our helper, don't bother */
|
|
if (!g_file_test (gst_install_plugins_get_helper (),
|
|
G_FILE_TEST_IS_EXECUTABLE))
|
|
return GST_INSTALL_PLUGINS_HELPER_MISSING;
|
|
|
|
if (!gst_install_plugins_spawn_child (details, ctx, &pid, NULL))
|
|
return GST_INSTALL_PLUGINS_INTERNAL_FAILURE;
|
|
|
|
helper = g_new (GstInstallPluginsAsyncHelper, 1);
|
|
helper->func = func;
|
|
helper->user_data = user_data;
|
|
|
|
g_child_watch_add (pid, gst_install_plugins_installer_exited, helper);
|
|
|
|
return GST_INSTALL_PLUGINS_STARTED_OK;
|
|
}
|
|
|
|
/**
|
|
* gst_install_plugins_sync:
|
|
* @details: (array zero-terminated=1) (transfer none): NULL-terminated array
|
|
* of installer string details
|
|
* @ctx: (allow-none): a #GstInstallPluginsContext, or NULL
|
|
*
|
|
* Requests plugin installation and block until the plugins have been
|
|
* installed or installation has failed.
|
|
*
|
|
* This function should almost never be used, it only exists for cases where
|
|
* a non-GLib main loop is running and the user wants to run it in a separate
|
|
* thread and marshal the result back asynchronously into the main thread
|
|
* using the other non-GLib main loop. You should almost always use
|
|
* gst_install_plugins_async() instead of this function.
|
|
*
|
|
* Returns: the result of the installation.
|
|
*/
|
|
GstInstallPluginsReturn
|
|
gst_install_plugins_sync (const gchar * const *details,
|
|
GstInstallPluginsContext * ctx)
|
|
{
|
|
gint status;
|
|
|
|
g_return_val_if_fail (details != NULL, GST_INSTALL_PLUGINS_INTERNAL_FAILURE);
|
|
|
|
if (install_in_progress)
|
|
return GST_INSTALL_PLUGINS_INSTALL_IN_PROGRESS;
|
|
|
|
/* if we can't access our helper, don't bother */
|
|
if (!g_file_test (gst_install_plugins_get_helper (),
|
|
G_FILE_TEST_IS_EXECUTABLE))
|
|
return GST_INSTALL_PLUGINS_HELPER_MISSING;
|
|
|
|
if (!gst_install_plugins_spawn_child (details, ctx, NULL, &status))
|
|
return GST_INSTALL_PLUGINS_INTERNAL_FAILURE;
|
|
|
|
return gst_install_plugins_return_from_status (status);
|
|
}
|
|
|
|
/**
|
|
* gst_install_plugins_return_get_name:
|
|
* @ret: the return status code
|
|
*
|
|
* Convenience function to return the descriptive string associated
|
|
* with a status code. This function returns English strings and
|
|
* should not be used for user messages. It is here only to assist
|
|
* in debugging.
|
|
*
|
|
* Returns: a descriptive string for the status code in @ret
|
|
*/
|
|
const gchar *
|
|
gst_install_plugins_return_get_name (GstInstallPluginsReturn ret)
|
|
{
|
|
switch (ret) {
|
|
case GST_INSTALL_PLUGINS_SUCCESS:
|
|
return "success";
|
|
case GST_INSTALL_PLUGINS_NOT_FOUND:
|
|
return "not-found";
|
|
case GST_INSTALL_PLUGINS_ERROR:
|
|
return "install-error";
|
|
case GST_INSTALL_PLUGINS_CRASHED:
|
|
return "installer-exit-unclean";
|
|
case GST_INSTALL_PLUGINS_PARTIAL_SUCCESS:
|
|
return "partial-success";
|
|
case GST_INSTALL_PLUGINS_USER_ABORT:
|
|
return "user-abort";
|
|
case GST_INSTALL_PLUGINS_STARTED_OK:
|
|
return "started-ok";
|
|
case GST_INSTALL_PLUGINS_INTERNAL_FAILURE:
|
|
return "internal-failure";
|
|
case GST_INSTALL_PLUGINS_HELPER_MISSING:
|
|
return "helper-missing";
|
|
case GST_INSTALL_PLUGINS_INSTALL_IN_PROGRESS:
|
|
return "install-in-progress";
|
|
case GST_INSTALL_PLUGINS_INVALID:
|
|
return "invalid";
|
|
default:
|
|
break;
|
|
}
|
|
return "(UNKNOWN)";
|
|
}
|
|
|
|
/**
|
|
* gst_install_plugins_installation_in_progress:
|
|
*
|
|
* Checks whether plugin installation (initiated by this application only)
|
|
* is currently in progress.
|
|
*
|
|
* Returns: TRUE if plugin installation is in progress, otherwise FALSE
|
|
*/
|
|
gboolean
|
|
gst_install_plugins_installation_in_progress (void)
|
|
{
|
|
return install_in_progress;
|
|
}
|
|
|
|
/**
|
|
* gst_install_plugins_supported:
|
|
*
|
|
* Checks whether plugin installation is likely to be supported by the
|
|
* current environment. This currently only checks whether the helper script
|
|
* that is to be provided by the distribution or operating system vendor
|
|
* exists.
|
|
*
|
|
* Returns: TRUE if plugin installation is likely to be supported.
|
|
*/
|
|
gboolean
|
|
gst_install_plugins_supported (void)
|
|
{
|
|
return g_file_test (gst_install_plugins_get_helper (),
|
|
G_FILE_TEST_IS_EXECUTABLE);
|
|
}
|