mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-09-19 18:40:31 +00:00
95d6fb0501
It doesn't make sense to ask installers for the same codec or element twice, so filter out duplicate requests before calling the external helper script and make the unit test check this works right. Fixes #567636.
783 lines
27 KiB
C
783 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., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, 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-ffmpegcolorspace
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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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* Since: 0.10.12
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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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* Since: 0.10.12
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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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* Since: 0.10.12
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*/
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void
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gst_install_plugins_context_free (GstInstallPluginsContext * ctx)
|
|
{
|
|
g_return_if_fail (ctx != NULL);
|
|
|
|
g_free (ctx);
|
|
}
|
|
|
|
static GstInstallPluginsContext *
|
|
gst_install_plugins_context_copy (GstInstallPluginsContext * ctx)
|
|
{
|
|
GstInstallPluginsContext *ret;
|
|
|
|
ret = gst_install_plugins_context_new ();
|
|
ret->xid = ctx->xid;
|
|
|
|
return ret;
|
|
}
|
|
|
|
GType
|
|
gst_install_plugins_context_get_type (void)
|
|
{
|
|
static GType gst_ipc_type = 0;
|
|
|
|
if (G_UNLIKELY (gst_ipc_type == 0)) {
|
|
gst_ipc_type = g_boxed_type_register_static ("GstInstallPluginsContext",
|
|
(GBoxedCopyFunc) gst_install_plugins_context_copy,
|
|
(GBoxedFreeFunc) gst_install_plugins_context_free);
|
|
}
|
|
return gst_ipc_type;
|
|
}
|
|
|
|
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 (gchar ** 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, 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 ((ret < 0 || 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: NULL-terminated array of installer string details (see below)
|
|
* @ctx: a #GstInstallPluginsContext, or NULL
|
|
* @func: the function to call when the installer program returns
|
|
* @user_data: 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
|
|
*
|
|
* Since: 0.10.12
|
|
*/
|
|
|
|
GstInstallPluginsReturn
|
|
gst_install_plugins_async (gchar ** 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: NULL-terminated array of installer string details
|
|
* @ctx: 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.
|
|
*
|
|
* Since: 0.10.12
|
|
*/
|
|
GstInstallPluginsReturn
|
|
gst_install_plugins_sync (gchar ** 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
|
|
*
|
|
* Since: 0.10.12
|
|
*/
|
|
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
|
|
*
|
|
* Since: 0.10.12
|
|
*/
|
|
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.
|
|
*
|
|
* Since: 0.10.15
|
|
*/
|
|
gboolean
|
|
gst_install_plugins_supported (void)
|
|
{
|
|
return g_file_test (gst_install_plugins_get_helper (),
|
|
G_FILE_TEST_IS_EXECUTABLE);
|
|
}
|