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762 lines
27 KiB
C
762 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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* @short_description: Missing plugin installation support for applications
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*
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* <refsect2>
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* <title>Overview</title>
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* <para>
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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 encoders/muxers
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* for a certain format, sources or sinks for a certain URI protocol
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* (e.g. 'http'), or certain elements known by their element factory name
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* ('audioresample').
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* </para>
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* <para>
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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 system
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* needs to make sure the necessary hooks and mechanisms are in place for
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* plugin installation to work. See below for more detailed information.
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* </para>
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* <para>
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* From the application perspective, plugin installation is usually triggered
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* either
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* <itemizedlist>
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* <listitem><para>
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* when the application itself has found that it wants or needs to install a
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* certain element
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* </para></listitem>
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* <listitem><para>
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* when the application has been notified by an element (such as playbin or
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* decodebin) that one or more plugins are missing <emphasis>and</emphasis>
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* the application has decided that it wants to install one or more of those
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* missing plugins
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* </para></listitem>
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* </itemizedlist>
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* </para>
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* <title>Detail Strings</title>
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* <para>
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* The install functions in this section all take one or more 'detail strings'.
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* These detail strings contain information about the type of plugin that
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* needs to be installed (decoder, encoder, source, sink, or named element),
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* and some additional information such GStreamer version used and a
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* human-readable description of the component to install for user dialogs.
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* </para>
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* <para>
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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 secret
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* between GStreamer and the plugin installer application.
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* </para>
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* <para>
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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 missing-plugin
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* message. Such a message will either have been found by the application on
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* a pipeline's #GstBus, or the application will have created it itself using
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* gst_missing_element_message_new(), gst_missing_decoder_message_new(),
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* gst_missing_encoder_message_new(), gst_missing_uri_sink_message_new(), or
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* gst_missing_uri_source_message_new().
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* </para>
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* <title>Plugin Installation from the Application Perspective</title>
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* <para>
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* For each GStreamer element/plugin/component that should be installed, the
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* application needs one of those 'installer detail' string mentioned in the
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* previous section. This string can be obtained, as already mentioned above,
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* from a missing-plugin message using the function
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* gst_missing_plugin_message_get_installer_detail(). The missing-plugin
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* message is either posted by another element and then found on the bus
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* by the application, or the application has created it itself as described
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* above.
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* </para>
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* <para>
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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 way
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* additional optional arguments like the application window's XID can be
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* passed to the external installer application.
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* </para>
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* <para>
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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 installer
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* has finished. If the result code indicates that new plugins have been
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* installed, the application will want to call gst_update_registry() so the
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* run-time plugin registry is updated and the new plugins are made available
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* to the application.
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* <note>
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* A Gtk/GLib main loop must be running in order for the result function to
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* be called when the external installer has finished. If this is not the case,
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* make sure to regularly call
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* <programlisting>
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* g_main_context_iteration (NULL,FALSE);
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* </programlisting>
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* from your code.
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* </note>
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* </para>
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* <title>Plugin Installation from the Vendor/Distribution Perspective</title>
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* <para>
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* <emphasis>1. Installer hook</emphasis>
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* </para>
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* <para>
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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 pre-defined
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* helper application will be called.
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* </para>
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* <para>
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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 <literal>./configure</literal> script based on the
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* install prefix. For a normal package build into the <literal>/usr</literal>
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* prefix, this will usually default to
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* <filename>/usr/libexec/gst-install-plugins-helper</filename> or
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* <filename>/usr/lib/gst-install-plugins-helper</filename>.
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* </para>
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* <para>
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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
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* <literal>./configure</literal> option
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* <literal>--with-install-plugins-helper=/path/to/installer</literal> to
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* make GStreamer call an installer of their own directly.
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* </para>
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* <para>
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* It is strongly recommended that vendors provide a small helper application
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* as interlocutor to the real installer though, even more so if command line
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* argument munging is required to transform the command line arguments
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* passed by GStreamer to the helper application into arguments that are
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* understood by the real installer.
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* </para>
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* <para>
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* The helper application path defined at compile time can be overriden at
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* runtime by setting the <envar>GST_INSTALL_PLUGINS_HELPER</envar>
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* environment variable. This can be useful for testing/debugging purposes.
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* </para>
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* <para>
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* <emphasis>2. Arguments passed to the install helper</emphasis>
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* </para>
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* <para>
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* GStreamer will pass the following arguments to the install helper (this is
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* in addition to the path of the executable itself, which is by convention
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* argv[0]):
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* <itemizedlist>
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* <listitem><para>
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* none to many optional arguments in the form of
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* <literal>--foo-bar=val</literal>. Example:
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* <literal>--transient-for=XID</literal> where XID is the X Window ID of
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* the 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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* </para></listitem>
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* <listitem><para>
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* one 'installer detail string' argument for each plugin to be installed;
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* these strings will have a <literal>gstreamer</literal> prefix; the
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* exact format of the detail string is explained below
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* </para></listitem>
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* </itemizedlist>
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* </para>
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* <para>
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* <emphasis>3. Detail string describing the missing plugin</emphasis>
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* </para>
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* <para>
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* The string is in UTF-8 encoding and is made up of several fields, separated
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* by '|' characters (but neither the first nor the last character is a '|').
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* The fields are:
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* <itemizedlist>
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* <listitem><para>
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* plugin system identifier, ie. "gstreamer"
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* </para><para>
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* This identifier determines the format of the rest of the detail string.
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* Automatic plugin installers should not process detail strings with
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* unknown identifiers. This allows other plugin-based libraries to use
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* the same mechanism for their automatic plugin installation needs, or
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* for the format to be changed should it turn out to be insufficient.
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* </para></listitem>
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* <listitem><para>
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* plugin system version, e.g. "0.10"
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* </para><para>
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* This is required so that when there is a GStreamer-0.12 or GStreamer-1.0
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* at some point in future, the different major versions can still co-exist
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* and use the same plugin install mechanism in the same way.
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* </para></listitem>
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* <listitem><para>
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* application identifier, e.g. "totem"
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* </para><para>
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* This may also be in the form of "pid/12345" if the program name can't
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* be obtained for some reason.
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* </para></listitem>
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* <listitem><para>
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* human-readable localised description of the required component,
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* e.g. "Vorbis audio decoder"
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* </para></listitem>
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* <listitem><para>
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* identifier string for the required component (see below for details about
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* how to map this to the package/plugin that needs installing), e.g.
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* <itemizedlist>
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* <listitem><para>
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* urisource-$(PROTOCOL_REQUIRED), e.g. urisource-http or urisource-mms
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* </para></listitem>
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* <listitem><para>
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* element-$(ELEMENT_REQUIRED), e.g. element-videoconvert
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* </para></listitem>
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* <listitem><para>
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* decoder-$(CAPS_REQUIRED), e.g. (do read below for more details!):
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* <itemizedlist>
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* <listitem><para>decoder-audio/x-vorbis</para></listitem>
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* <listitem><para>decoder-application/ogg</para></listitem>
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* <listitem><para>decoder-audio/mpeg, mpegversion=(int)4</para></listitem>
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* <listitem><para>decoder-video/mpeg, systemstream=(boolean)true, mpegversion=(int)2</para></listitem>
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</itemizedlist>
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* </para></listitem>
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* <listitem><para>
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* encoder-$(CAPS_REQUIRED), e.g. encoder-audio/x-vorbis
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* </para></listitem>
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* </itemizedlist>
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* </para></listitem>
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* <listitem><para>
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* optional further fields not yet specified
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* </para></listitem>
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* </itemizedlist>
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* </para>
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* <para>
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* An entire ID string might then look like this, for example:
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* <literal>
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* gstreamer|0.10|totem|Vorbis audio decoder|decoder-audio/x-vorbis
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* </literal>
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* </para>
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* <para>
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* Plugin installers parsing this ID string should expect further fields also
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* separated by '|' symbols and either ignore them, warn the user, or error
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* out when encountering them.
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* </para>
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* <para>
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* Those unfamiliar with the GStreamer 'caps' system should note a few things
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* about the caps string used in the above decoder/encoder case:
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* <itemizedlist>
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* <listitem><para>
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* the first part ("video/mpeg") of the caps string is a GStreamer media
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* type and <emphasis>not</emphasis> a MIME type. Wherever possible, the
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* GStreamer media type will be the same as the corresponding MIME type,
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* but often it is not.
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* </para></listitem>
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* <listitem><para>
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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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* </para></listitem>
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* <listitem><para>
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* the caps string of a 'required' component (as above) will always have
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* fields with fixed values, whereas an introspected string (see below)
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* may have fields with non-fixed values. Compare for example:
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* <itemizedlist>
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* <listitem><para>
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* <literal>audio/mpeg, mpegversion=(int)4</literal> vs.
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* <literal>audio/mpeg, mpegversion=(int){2, 4}</literal>
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* </para></listitem>
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* <listitem><para>
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* <literal>video/mpeg, mpegversion=(int)2</literal> vs.
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* <literal>video/mpeg, systemstream=(boolean){ true, false}, mpegversion=(int)[1, 2]</literal>
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* </para></listitem>
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* </itemizedlist>
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* </para></listitem>
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* </itemizedlist>
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* </para>
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* <para>
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* <emphasis>4. Exit codes the installer should return</emphasis>
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* </para>
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* <para>
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* The installer should return one of the following exit codes when it exits:
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* <itemizedlist>
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* <listitem><para>
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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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* </para></listitem>
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* <listitem><para>
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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 installed
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* (#GST_INSTALL_PLUGINS_NOT_FOUND)
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* </para></listitem>
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* <listitem><para>
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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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* </para></listitem>
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* <listitem><para>
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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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* </para></listitem>
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* <listitem><para>
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* 4 if the user aborted the installation (#GST_INSTALL_PLUGINS_USER_ABORT)
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* </para></listitem>
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* </itemizedlist>
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* </para>
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* <para>
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* <emphasis>5. How to map the required detail string to packages</emphasis>
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* </para>
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* <para>
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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 packaging
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* system metadata.
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* </para>
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* <para>
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* GStreamer plugin files can be introspected for this information. The
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* <literal>gst-inspect</literal> utility has a special command line option
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* that will output information similar to what is required. For example
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* <command>
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* $ gst-inspect-0.10 --print-plugin-auto-install-info /path/to/libgstvorbis.so
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* </command>
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* should output something along the lines of
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* <computeroutput>
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* decoder-audio/x-vorbis
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* element-vorbisdec
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* element-vorbisenc
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* element-vorbisparse
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* element-vorbistag
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* encoder-audio/x-vorbis
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* </computeroutput>
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* Note that in the encoder and decoder case the introspected caps can be more
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* complex with additional fields, e.g.
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* <literal>audio/mpeg,mpegversion=(int){2,4}</literal>, so they will not
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* always exactly match the caps wanted by the application. It is up to the
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* installer to deal with this (either by doing proper caps intersection using
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* the GStreamer #GstCaps API, or by only taking into account the media type).
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* </para>
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* <para>
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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 distribution
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* to handle (but usually not relevant for playback applications).
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* </para>
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* </refsect2>
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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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guint xid;
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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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* <programlisting>
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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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* </programlisting>
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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);
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}
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static GstInstallPluginsContext *
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gst_install_plugins_context_copy (GstInstallPluginsContext * ctx)
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{
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GstInstallPluginsContext *ret;
|
|
|
|
ret = gst_install_plugins_context_new ();
|
|
ret->xid = ctx->xid;
|
|
|
|
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, xid_str[64] = { 0, };
|
|
|
|
arr = g_ptr_array_new ();
|
|
|
|
/* argv[0] = helper path */
|
|
g_ptr_array_add (arr, (gchar *) gst_install_plugins_get_helper ());
|
|
|
|
/* add any additional command line args from the context */
|
|
if (ctx != NULL && ctx->xid != 0) {
|
|
g_snprintf (xid_str, sizeof (xid_str), "--transient-for=%u", ctx->xid);
|
|
g_ptr_array_add (arr, xid_str);
|
|
}
|
|
|
|
/* 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, (gpointer) 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_free (arr, TRUE);
|
|
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);
|
|
}
|