Adding upstream version 4:7.4.7.upstream/4%7.4.7upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 946 insertions, 0 deletions

diff --git a/avmedia/source/gstreamer/gstplayer.cxx b/avmedia/source/gstreamer/gstplayer.cxx
new file mode 100644
index 000000000..6884654b6
--- /dev/null
+++ b/avmedia/source/gstreamer/gstplayer.cxx
@@ -0,0 +1,946 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#include <sal/config.h>
+
+#include <algorithm>
+#include <cassert>
+#include <chrono>
+#include <cstddef>
+#include <cstring>
+#include <map>
+#include <set>
+#include <vector>
+#include <math.h>
+
+#include <com/sun/star/text/GraphicCrop.hpp>
+
+#include <cppuhelper/supportsservice.hxx>
+#include <sal/log.hxx>
+#include <rtl/string.hxx>
+#include <salhelper/thread.hxx>
+#include <vcl/svapp.hxx>
+#include <vcl/syschild.hxx>
+#include <vcl/sysdata.hxx>
+#include <vcl/graph.hxx>
+#include <avmedia/mediaitem.hxx>
+
+#include "gstplayer.hxx"
+#include "gstframegrabber.hxx"
+#include "gstwindow.hxx"
+
+#include <gst/video/videooverlay.h>
+#include <gst/pbutils/missing-plugins.h>
+#include <gst/pbutils/pbutils.h>
+
+constexpr OUStringLiteral AVMEDIA_GST_PLAYER_IMPLEMENTATIONNAME = u"com.sun.star.comp.avmedia.Player_GStreamer";
+constexpr OUStringLiteral AVMEDIA_GST_PLAYER_SERVICENAME        = u"com.sun.star.media.Player_GStreamer";
+#define AVVERSION "gst 1.0: "
+
+using namespace ::com::sun::star;
+
+namespace avmedia::gstreamer {
+
+namespace {
+
+class FlagGuard {
+public:
+    explicit FlagGuard(bool & flag): flag_(flag) { flag_ = true; }
+
+    ~FlagGuard() { flag_ = false; }
+
+private:
+    bool & flag_;
+};
+
+class MissingPluginInstallerThread: public salhelper::Thread {
+public:
+    MissingPluginInstallerThread(): Thread("MissingPluginInstaller") {}
+
+private:
+    void execute() override;
+};
+
+
+class MissingPluginInstaller {
+    friend class MissingPluginInstallerThread;
+
+public:
+    MissingPluginInstaller(): launchNewThread_(true), inCleanUp_(false) {}
+
+    ~MissingPluginInstaller();
+
+    void report(rtl::Reference<Player> const & source, GstMessage * message);
+
+    // Player::~Player calls Player::disposing calls
+    // MissingPluginInstaller::detach, so do not take Player by rtl::Reference
+    // here (which would bump its refcount back from 0 to 1):
+    void detach(Player const * source);
+
+private:
+    void processQueue();
+
+    DECL_STATIC_LINK(MissingPluginInstaller, launchUi, void*, void);
+
+    osl::Mutex mutex_;
+    std::set<OString> reported_;
+    std::map<OString, std::set<rtl::Reference<Player>>> queued_;
+    rtl::Reference<MissingPluginInstallerThread> currentThread_;
+    std::vector<OString> currentDetails_;
+    std::set<rtl::Reference<Player>> currentSources_;
+    bool launchNewThread_;
+    bool inCleanUp_;
+};
+
+
+MissingPluginInstaller::~MissingPluginInstaller() {
+    osl::MutexGuard g(mutex_);
+    SAL_WARN_IF(currentThread_.is(), "avmedia.gstreamer", "unjoined thread");
+    inCleanUp_ = true;
+}
+
+
+void MissingPluginInstaller::report(
+    rtl::Reference<Player> const & source, GstMessage * message)
+{
+    // assert(gst_is_missing_plugin_message(message));
+    gchar * det = gst_missing_plugin_message_get_installer_detail(message);
+    if (det == nullptr) {
+        SAL_WARN(
+            "avmedia.gstreamer",
+            "gst_missing_plugin_message_get_installer_detail failed");
+        return;
+    }
+    std::size_t len = std::strlen(det);
+    if (len > SAL_MAX_INT32) {
+        SAL_WARN("avmedia.gstreamer", "detail string too long");
+        g_free(det);
+        return;
+    }
+    OString detStr(det, len);
+    g_free(det);
+    rtl::Reference<MissingPluginInstallerThread> join;
+    rtl::Reference<MissingPluginInstallerThread> launch;
+    {
+        osl::MutexGuard g(mutex_);
+        if (reported_.find(detStr) != reported_.end()) {
+            return;
+        }
+        auto & i = queued_[detStr];
+        bool fresh = i.empty();
+        i.insert(source);
+        if (!(fresh && launchNewThread_)) {
+            return;
+        }
+        join = currentThread_;
+        currentThread_ = new MissingPluginInstallerThread;
+        {
+            FlagGuard f(inCleanUp_);
+            currentSources_.clear();
+        }
+        processQueue();
+        launchNewThread_ = false;
+        launch = currentThread_;
+    }
+    if (join.is()) {
+        join->join();
+    }
+    launch->acquire();
+    Application::PostUserEvent(
+        LINK(this, MissingPluginInstaller, launchUi), launch.get());
+}
+
+
+void eraseSource(std::set<rtl::Reference<Player>> & set, Player const * source)
+{
+    auto i = std::find_if(
+        set.begin(), set.end(),
+        [source](rtl::Reference<Player> const & el) {
+            return el.get() == source;
+        });
+    if (i != set.end()) {
+        set.erase(i);
+    }
+}
+
+
+void MissingPluginInstaller::detach(Player const * source) {
+    rtl::Reference<MissingPluginInstallerThread> join;
+    {
+        osl::MutexGuard g(mutex_);
+        if (inCleanUp_) {
+            // Guard against ~MissingPluginInstaller with erroneously un-joined
+            // currentThread_ (thus non-empty currentSources_) calling
+            // destructor of currentSources_, calling ~Player, calling here,
+            // which would use currentSources_ while it is already being
+            // destroyed:
+            return;
+        }
+        for (auto i = queued_.begin(); i != queued_.end();) {
+            eraseSource(i->second, source);
+            if (i->second.empty()) {
+                i = queued_.erase(i);
+            } else {
+                ++i;
+            }
+        }
+        if (currentThread_.is()) {
+            assert(!currentSources_.empty());
+            eraseSource(currentSources_, source);
+            if (currentSources_.empty()) {
+                join = currentThread_;
+                currentThread_.clear();
+                launchNewThread_ = true;
+            }
+        }
+    }
+    if (join.is()) {
+        // missing cancellability of gst_install_plugins_sync
+        join->join();
+    }
+}
+
+
+void MissingPluginInstaller::processQueue() {
+    assert(!queued_.empty());
+    assert(currentDetails_.empty());
+    for (const auto& rEntry : queued_) {
+        reported_.insert(rEntry.first);
+        currentDetails_.push_back(rEntry.first);
+        currentSources_.insert(rEntry.second.begin(), rEntry.second.end());
+    }
+    queued_.clear();
+}
+
+
+IMPL_STATIC_LINK(MissingPluginInstaller, launchUi, void *, p, void)
+{
+    MissingPluginInstallerThread* thread = static_cast<MissingPluginInstallerThread*>(p);
+    rtl::Reference<MissingPluginInstallerThread> ref(thread, SAL_NO_ACQUIRE);
+    gst_pb_utils_init();
+        // not thread safe; hopefully fine to consistently call from our event
+        // loop (which is the only reason to have this
+        // Application::PostUserEvent diversion, in case
+        // MissingPluginInstaller::report might be called from outside our event
+        // loop), and hopefully fine to call gst_is_missing_plugin_message and
+        // gst_missing_plugin_message_get_installer_detail before calling
+        // gst_pb_utils_init
+    ref->launch();
+}
+
+
+struct TheMissingPluginInstaller:
+    public rtl::Static<MissingPluginInstaller, TheMissingPluginInstaller>
+{};
+
+
+void MissingPluginInstallerThread::execute() {
+    MissingPluginInstaller & inst = TheMissingPluginInstaller::get();
+    for (;;) {
+        std::vector<OString> details;
+        {
+            osl::MutexGuard g(inst.mutex_);
+            assert(!inst.currentDetails_.empty());
+            details.swap(inst.currentDetails_);
+        }
+        std::vector<char *> args;
+        args.reserve(details.size());
+        for (auto const& i : details)
+        {
+            args.push_back(const_cast<char *>(i.getStr()));
+        }
+        args.push_back(nullptr);
+        gst_install_plugins_sync(args.data(), nullptr);
+        {
+            osl::MutexGuard g(inst.mutex_);
+            if (inst.queued_.empty() || inst.launchNewThread_) {
+                inst.launchNewThread_ = true;
+                break;
+            }
+            inst.processQueue();
+        }
+    }
+}
+
+} // end anonymous namespace
+
+
+Player::Player() :
+    GstPlayer_BASE( m_aMutex ),
+    mpPlaybin( nullptr ),
+    mpVolumeControl( nullptr ),
+    mbUseGtkSink( false ),
+    mbFakeVideo (false ),
+    mnUnmutedVolume( 0 ),
+    mbMuted( false ),
+    mbLooping( false ),
+    mbInitialized( false ),
+    mpDisplay( nullptr ),
+    mnWindowID( 0 ),
+    mpXOverlay( nullptr ),
+    mnDuration( 0 ),
+    mnWidth( 0 ),
+    mnHeight( 0 ),
+    mnWatchID( 0 ),
+    mbWatchID( false )
+{
+    // Initialize GStreamer library
+    int argc = 1;
+    char name[] = "libreoffice";
+    char *arguments[] = { name };
+    char** argv = arguments;
+    GError* pError = nullptr;
+
+    mbInitialized = gst_init_check( &argc, &argv, &pError );
+
+    SAL_INFO( "avmedia.gstreamer", AVVERSION << this << " Player::Player" );
+
+    if (pError != nullptr)
+    {
+        // TODO: throw an exception?
+        SAL_INFO( "avmedia.gstreamer", AVVERSION << this << " Player::Player error '" << pError->message << "'" );
+        g_error_free (pError);
+    }
+}
+
+
+Player::~Player()
+{
+    SAL_INFO( "avmedia.gstreamer", AVVERSION << this << " Player::~Player" );
+    if( mbInitialized )
+        disposing();
+}
+
+
+void SAL_CALL Player::disposing()
+{
+    TheMissingPluginInstaller::get().detach(this);
+
+    ::osl::MutexGuard aGuard(m_aMutex);
+
+    stop();
+
+    SAL_INFO( "avmedia.gstreamer", AVVERSION << this << " Player::disposing" );
+
+    // Release the elements and pipeline
+    if( mbInitialized )
+    {
+        if( mpPlaybin )
+        {
+            gst_element_set_state( mpPlaybin, GST_STATE_NULL );
+            g_object_unref( G_OBJECT( mpPlaybin ) );
+
+            mpPlaybin = nullptr;
+            mpVolumeControl = nullptr;
+        }
+
+        if( mpXOverlay ) {
+            g_object_unref( G_OBJECT ( mpXOverlay ) );
+            mpXOverlay = nullptr;
+        }
+
+    }
+    if (mbWatchID)
+    {
+        g_source_remove(mnWatchID);
+        mbWatchID = false;
+    }
+}
+
+
+static gboolean pipeline_bus_callback( GstBus *, GstMessage *message, gpointer data )
+{
+    Player* pPlayer = static_cast<Player*>(data);
+
+    pPlayer->processMessage( message );
+
+    return true;
+}
+
+
+static GstBusSyncReply pipeline_bus_sync_handler( GstBus *, GstMessage * message, gpointer data )
+{
+    Player* pPlayer = static_cast<Player*>(data);
+
+    return pPlayer->processSyncMessage( message );
+}
+
+
+void Player::processMessage( GstMessage *message )
+{
+    switch( GST_MESSAGE_TYPE( message ) ) {
+    case GST_MESSAGE_EOS:
+        gst_element_set_state( mpPlaybin, GST_STATE_READY );
+        if (mbLooping)
+            start();
+        break;
+    case GST_MESSAGE_STATE_CHANGED:
+        if (message->src == GST_OBJECT(mpPlaybin))
+        {
+            GstState newstate, pendingstate;
+
+            gst_message_parse_state_changed (message, nullptr, &newstate, &pendingstate);
+
+            if (!mbUseGtkSink && newstate == GST_STATE_PAUSED &&
+                pendingstate == GST_STATE_VOID_PENDING && mpXOverlay)
+            {
+                gst_video_overlay_expose(mpXOverlay);
+            }
+        }
+        break;
+    default:
+        break;
+    }
+}
+
+#define LCL_WAYLAND_DISPLAY_HANDLE_CONTEXT_TYPE "GstWaylandDisplayHandleContextType"
+
+static bool lcl_is_wayland_display_handle_need_context_message(GstMessage* msg)
+{
+    g_return_val_if_fail(GST_IS_MESSAGE(msg), false);
+
+    if (GST_MESSAGE_TYPE(msg) != GST_MESSAGE_NEED_CONTEXT)
+        return false;
+    const gchar *type = nullptr;
+    if (!gst_message_parse_context_type(msg, &type))
+        return false;
+    return !g_strcmp0(type, LCL_WAYLAND_DISPLAY_HANDLE_CONTEXT_TYPE);
+}
+
+static GstContext* lcl_wayland_display_handle_context_new(void* display)
+{
+    GstContext *context = gst_context_new(LCL_WAYLAND_DISPLAY_HANDLE_CONTEXT_TYPE, true);
+    gst_structure_set (gst_context_writable_structure (context),
+                       "handle", G_TYPE_POINTER, display, nullptr);
+    return context;
+}
+
+GstBusSyncReply Player::processSyncMessage( GstMessage *message )
+{
+#if OSL_DEBUG_LEVEL > 0
+    if ( GST_MESSAGE_TYPE( message ) == GST_MESSAGE_ERROR )
+    {
+        GError* error;
+        gchar* error_debug;
+
+        gst_message_parse_error( message, &error, &error_debug );
+        SAL_WARN(
+            "avmedia.gstreamer",
+            "error: '" << error->message << "' debug: '"
+                << error_debug << "'");
+    }
+#endif
+
+    if (!mbUseGtkSink)
+    {
+        if (gst_is_video_overlay_prepare_window_handle_message (message) )
+        {
+            SAL_INFO( "avmedia.gstreamer", AVVERSION << this << " processSyncMessage prepare window id: " <<
+                      GST_MESSAGE_TYPE_NAME( message ) << " " << static_cast<int>(mnWindowID) );
+            if( mpXOverlay )
+                g_object_unref( G_OBJECT ( mpXOverlay ) );
+            g_object_set( GST_MESSAGE_SRC( message ), "force-aspect-ratio", FALSE, nullptr );
+            mpXOverlay = GST_VIDEO_OVERLAY( GST_MESSAGE_SRC( message ) );
+            g_object_ref( G_OBJECT ( mpXOverlay ) );
+            if ( mnWindowID != 0 )
+            {
+                gst_video_overlay_set_window_handle( mpXOverlay, mnWindowID );
+                gst_video_overlay_handle_events(mpXOverlay, 0); // Let the parent window handle events.
+                if (maArea.Width > 0 && maArea.Height > 0)
+                    gst_video_overlay_set_render_rectangle(mpXOverlay, maArea.X, maArea.Y, maArea.Width, maArea.Height);
+            }
+
+            return GST_BUS_DROP;
+        }
+        else if (lcl_is_wayland_display_handle_need_context_message(message))
+        {
+            GstContext *context = lcl_wayland_display_handle_context_new(mpDisplay);
+            gst_element_set_context(GST_ELEMENT(GST_MESSAGE_SRC(message)), context);
+
+            return GST_BUS_DROP;
+        }
+    }
+
+    if( GST_MESSAGE_TYPE( message ) == GST_MESSAGE_ASYNC_DONE ) {
+        if( mnDuration == 0) {
+            gint64 gst_duration = 0;
+            if( gst_element_query_duration( mpPlaybin, GST_FORMAT_TIME, &gst_duration) )
+                mnDuration = gst_duration;
+        }
+        if( mnWidth == 0 ) {
+            GstPad *pad = nullptr;
+
+            g_signal_emit_by_name( mpPlaybin, "get-video-pad", 0, &pad );
+
+            if( pad ) {
+                int w = 0, h = 0;
+
+                GstCaps *caps = gst_pad_get_current_caps( pad );
+
+                if( gst_structure_get( gst_caps_get_structure( caps, 0 ),
+                                       "width", G_TYPE_INT, &w,
+                                       "height", G_TYPE_INT, &h,
+                                       nullptr ) ) {
+                    mnWidth = w;
+                    mnHeight = h;
+
+                    SAL_INFO( "avmedia.gstreamer", AVVERSION "queried size: " << mnWidth << "x" << mnHeight );
+
+                }
+                gst_caps_unref( caps );
+                g_object_unref( pad );
+            }
+
+            maSizeCondition.set();
+        }
+    } else if (gst_is_missing_plugin_message(message)) {
+        TheMissingPluginInstaller::get().report(this, message);
+        if( mnWidth == 0 ) {
+            // an error occurred, set condition so that OOo thread doesn't wait for us
+            maSizeCondition.set();
+        }
+    } else if( GST_MESSAGE_TYPE( message ) == GST_MESSAGE_ERROR ) {
+        if( mnWidth == 0 ) {
+            // an error occurred, set condition so that OOo thread doesn't wait for us
+            maSizeCondition.set();
+        }
+    }
+
+    return GST_BUS_PASS;
+}
+
+void Player::preparePlaybin( std::u16string_view rURL, GstElement *pSink )
+{
+    if (mpPlaybin != nullptr)
+    {
+        gst_element_set_state( mpPlaybin, GST_STATE_NULL );
+        g_object_unref( mpPlaybin );
+    }
+
+    mpPlaybin = gst_element_factory_make( "playbin", nullptr );
+
+    //tdf#96989 on systems with flat-volumes setting the volume directly on the
+    //playbin to 100% results in setting the global volume to 100% of the
+    //maximum. We expect to set as % of the current volume.
+    mpVolumeControl = gst_element_factory_make( "volume", nullptr );
+    GstElement *pAudioSink = gst_element_factory_make( "autoaudiosink", nullptr );
+    GstElement* pAudioOutput = gst_bin_new("audio-output-bin");
+    assert(pAudioOutput);
+    if (pAudioSink)
+        gst_bin_add(GST_BIN(pAudioOutput), pAudioSink);
+    if (mpVolumeControl)
+    {
+        gst_bin_add(GST_BIN(pAudioOutput), mpVolumeControl);
+        if (pAudioSink)
+            gst_element_link(mpVolumeControl, pAudioSink);
+        GstPad *pPad = gst_element_get_static_pad(mpVolumeControl, "sink");
+        gst_element_add_pad(GST_ELEMENT(pAudioOutput), gst_ghost_pad_new("sink", pPad));
+        gst_object_unref(GST_OBJECT(pPad));
+    }
+    g_object_set(G_OBJECT(mpPlaybin), "audio-sink", pAudioOutput, nullptr);
+
+    if( pSink != nullptr ) // used for getting preferred size etc.
+    {
+        g_object_set( G_OBJECT( mpPlaybin ), "video-sink", pSink, nullptr );
+        mbFakeVideo = true;
+    }
+    else
+        mbFakeVideo = false;
+
+    OString ascURL = OUStringToOString( rURL, RTL_TEXTENCODING_UTF8 );
+    g_object_set( G_OBJECT( mpPlaybin ), "uri", ascURL.getStr() , nullptr );
+
+    GstBus *pBus = gst_element_get_bus( mpPlaybin );
+    if (mbWatchID)
+    {
+        g_source_remove(mnWatchID);
+        mbWatchID = false;
+    }
+    mnWatchID = gst_bus_add_watch( pBus, pipeline_bus_callback, this );
+    mbWatchID = true;
+    SAL_INFO( "avmedia.gstreamer", AVVERSION << this << " set sync handler" );
+    gst_bus_set_sync_handler( pBus, pipeline_bus_sync_handler, this, nullptr );
+    g_object_unref( pBus );
+}
+
+
+bool Player::create( const OUString& rURL )
+{
+    bool    bRet = false;
+
+    // create all the elements and link them
+
+    SAL_INFO( "avmedia.gstreamer", "create player, URL: '" << rURL << "'" );
+
+    if( mbInitialized && !rURL.isEmpty() )
+    {
+        // fakesink for pre-roll & sizing ...
+        preparePlaybin( rURL, gst_element_factory_make( "fakesink", nullptr ) );
+
+        gst_element_set_state( mpPlaybin, GST_STATE_PAUSED );
+
+        bRet = true;
+    }
+
+    if( bRet )
+        maURL = rURL;
+    else
+        maURL.clear();
+
+    return bRet;
+}
+
+void SAL_CALL Player::start()
+{
+    ::osl::MutexGuard aGuard(m_aMutex);
+
+    // set the pipeline state to READY and run the loop
+    if( mbInitialized && mpPlaybin != nullptr )
+    {
+        gst_element_set_state( mpPlaybin, GST_STATE_PLAYING );
+    }
+}
+
+void SAL_CALL Player::stop()
+{
+    ::osl::MutexGuard aGuard(m_aMutex);
+
+    // set the pipeline in PAUSED STATE
+    if( mpPlaybin )
+        gst_element_set_state( mpPlaybin, GST_STATE_PAUSED );
+
+    SAL_INFO( "avmedia.gstreamer", AVVERSION "stop " << mpPlaybin );
+}
+
+sal_Bool SAL_CALL Player::isPlaying()
+{
+    ::osl::MutexGuard aGuard(m_aMutex);
+
+    bool bRet = false;
+
+    // return whether the pipeline target is PLAYING STATE or not
+    if (mbInitialized && mpPlaybin)
+    {
+        bRet = GST_STATE_TARGET(mpPlaybin) == GST_STATE_PLAYING;
+    }
+
+    SAL_INFO( "avmedia.gstreamer", AVVERSION "isPlaying " << bRet );
+
+    return bRet;
+}
+
+double SAL_CALL Player::getDuration()
+{
+    ::osl::MutexGuard aGuard(m_aMutex);
+
+    // slideshow checks for non-zero duration, so cheat here
+    double duration = 0.3;
+
+    if( mpPlaybin && mnDuration > 0 ) {
+        duration = mnDuration / GST_SECOND;
+    }
+
+    return duration;
+}
+
+
+void SAL_CALL Player::setMediaTime( double fTime )
+{
+    ::osl::MutexGuard aGuard(m_aMutex);
+
+    if( !mpPlaybin )
+        return;
+
+    gint64 gst_position = llround (fTime * GST_SECOND);
+
+    gst_element_seek( mpPlaybin, 1.0,
+                      GST_FORMAT_TIME,
+                      GST_SEEK_FLAG_FLUSH,
+                      GST_SEEK_TYPE_SET, gst_position,
+                      GST_SEEK_TYPE_NONE, 0 );
+
+    SAL_INFO( "avmedia.gstreamer", AVVERSION "seek to: " << gst_position << " ns original: " << fTime << " s" );
+}
+
+
+double SAL_CALL Player::getMediaTime()
+{
+    ::osl::MutexGuard aGuard(m_aMutex);
+
+    double position = 0.0;
+
+    if( mpPlaybin ) {
+        // get current position in the stream
+        gint64 gst_position;
+        if( gst_element_query_position( mpPlaybin, GST_FORMAT_TIME, &gst_position ) )
+            position = gst_position / GST_SECOND;
+    }
+
+    return position;
+}
+
+
+void SAL_CALL Player::setPlaybackLoop( sal_Bool bSet )
+{
+    ::osl::MutexGuard aGuard(m_aMutex);
+    // TODO check how to do with GST
+    mbLooping = bSet;
+}
+
+
+sal_Bool SAL_CALL Player::isPlaybackLoop()
+{
+    ::osl::MutexGuard aGuard(m_aMutex);
+    // TODO check how to do with GST
+    return mbLooping;
+}
+
+
+void SAL_CALL Player::setMute( sal_Bool bSet )
+{
+    ::osl::MutexGuard aGuard(m_aMutex);
+
+    SAL_INFO( "avmedia.gstreamer", AVVERSION "set mute: " << bSet << " muted: " << mbMuted << " unmuted volume: " << mnUnmutedVolume );
+
+    // change the volume to 0 or the unmuted volume
+    if (mpVolumeControl && mbMuted != bool(bSet))
+    {
+        double nVolume = mnUnmutedVolume;
+        if( bSet )
+        {
+            nVolume = 0.0;
+        }
+
+        g_object_set( G_OBJECT( mpVolumeControl ), "volume", nVolume, nullptr );
+
+        mbMuted = bSet;
+    }
+}
+
+
+sal_Bool SAL_CALL Player::isMute()
+{
+    ::osl::MutexGuard aGuard(m_aMutex);
+
+    return mbMuted;
+}
+
+
+void SAL_CALL Player::setVolumeDB( sal_Int16 nVolumeDB )
+{
+    ::osl::MutexGuard aGuard(m_aMutex);
+
+    mnUnmutedVolume = pow( 10.0, nVolumeDB / 20.0 );
+
+    SAL_INFO( "avmedia.gstreamer", AVVERSION "set volume: " << nVolumeDB << " gst volume: " << mnUnmutedVolume );
+
+    // change volume
+    if (mpVolumeControl && !mbMuted)
+    {
+        g_object_set( G_OBJECT( mpVolumeControl ), "volume", mnUnmutedVolume, nullptr );
+    }
+}
+
+
+sal_Int16 SAL_CALL Player::getVolumeDB()
+{
+    ::osl::MutexGuard aGuard(m_aMutex);
+
+    sal_Int16 nVolumeDB(0);
+
+    if (mpVolumeControl)
+    {
+        double nGstVolume = 0.0;
+
+        g_object_get( G_OBJECT( mpVolumeControl ), "volume", &nGstVolume, nullptr );
+
+        nVolumeDB = static_cast<sal_Int16>( 20.0*log10 ( nGstVolume ) );
+    }
+
+    return nVolumeDB;
+}
+
+
+awt::Size SAL_CALL Player::getPreferredPlayerWindowSize()
+{
+    ::osl::MutexGuard aGuard(m_aMutex);
+
+    awt::Size aSize( 0, 0 );
+
+    if( maURL.isEmpty() )
+    {
+        SAL_INFO( "avmedia.gstreamer", AVVERSION << this << " Player::getPreferredPlayerWindowSize - empty URL => 0x0" );
+        return aSize;
+    }
+
+    SAL_INFO( "avmedia.gstreamer", AVVERSION << this << " pre-Player::getPreferredPlayerWindowSize, member " << mnWidth << "x" << mnHeight );
+
+    osl::Condition::Result aResult = maSizeCondition.wait( std::chrono::seconds(10) );
+
+    SAL_INFO( "avmedia.gstreamer", AVVERSION << this << " Player::getPreferredPlayerWindowSize after waitCondition " << aResult << ", member " << mnWidth << "x" << mnHeight );
+
+    if( mnWidth != 0 && mnHeight != 0 ) {
+        aSize.Width = mnWidth;
+        aSize.Height = mnHeight;
+    }
+
+    return aSize;
+}
+
+uno::Reference< ::media::XPlayerWindow > SAL_CALL Player::createPlayerWindow( const uno::Sequence< uno::Any >& rArguments )
+{
+    ::osl::MutexGuard aGuard(m_aMutex);
+
+    uno::Reference< ::media::XPlayerWindow >    xRet;
+
+    if (rArguments.getLength() > 1)
+       rArguments[1] >>= maArea;
+
+    awt::Size aSize = getPreferredPlayerWindowSize();
+
+    if( mbFakeVideo )
+        preparePlaybin( maURL, nullptr );
+
+    SAL_INFO( "avmedia.gstreamer", AVVERSION "Player::createPlayerWindow " << aSize.Width << "x" << aSize.Height << " length: " << rArguments.getLength() );
+
+    if( aSize.Width > 0 && aSize.Height > 0 )
+    {
+        if (rArguments.getLength() <= 2)
+        {
+            xRet = new ::avmedia::gstreamer::Window;
+            return xRet;
+        }
+
+        sal_IntPtr pIntPtr = 0;
+        rArguments[ 2 ] >>= pIntPtr;
+        SystemChildWindow *pParentWindow = reinterpret_cast< SystemChildWindow* >( pIntPtr );
+        if (!pParentWindow)
+            return nullptr;
+
+        const SystemEnvData* pEnvData = pParentWindow->GetSystemData();
+        if (!pEnvData)
+            return nullptr;
+
+        // tdf#124027: the position of embedded window is identical w/ the position
+        // of media object in all other vclplugs (kf5, gen), in gtk3 w/o gtksink it
+        // needs to be translated
+        if (pEnvData->toolkit == SystemEnvData::Toolkit::Gtk)
+        {
+            Point aPoint = pParentWindow->GetPosPixel();
+            maArea.X = aPoint.getX();
+            maArea.Y = aPoint.getY();
+        }
+
+        mbUseGtkSink = false;
+
+        GstElement *pVideosink = static_cast<GstElement*>(pParentWindow->CreateGStreamerSink());
+        if (pVideosink)
+        {
+            if (pEnvData->toolkit == SystemEnvData::Toolkit::Gtk)
+                mbUseGtkSink = true;
+        }
+        else
+        {
+            if (pEnvData->platform == SystemEnvData::Platform::Wayland)
+                pVideosink = gst_element_factory_make("waylandsink", "video-output");
+            else
+                pVideosink = gst_element_factory_make("autovideosink", "video-output");
+            if (!pVideosink)
+                return nullptr;
+        }
+
+        xRet = new ::avmedia::gstreamer::Window;
+
+        g_object_set(G_OBJECT(mpPlaybin), "video-sink", pVideosink, nullptr);
+        g_object_set(G_OBJECT(mpPlaybin), "force-aspect-ratio", FALSE, nullptr);
+
+        if ((rArguments.getLength() >= 4) && (rArguments[3] >>= pIntPtr) && pIntPtr)
+        {
+            auto pItem = reinterpret_cast<const avmedia::MediaItem*>(pIntPtr);
+            Graphic aGraphic = pItem->getGraphic();
+            const text::GraphicCrop& rCrop = pItem->getCrop();
+            if (!aGraphic.IsNone() && (rCrop.Bottom > 0 || rCrop.Left > 0 || rCrop.Right > 0 || rCrop.Top > 0))
+            {
+                // The media item has a non-empty cropping set. Try to crop the video accordingly.
+                Size aPref = aGraphic.GetPrefSize();
+                Size aPixel = aGraphic.GetSizePixel();
+                tools::Long nLeft = aPixel.getWidth() * rCrop.Left / aPref.getWidth();
+                tools::Long nTop = aPixel.getHeight() * rCrop.Top / aPref.getHeight();
+                tools::Long nRight = aPixel.getWidth() * rCrop.Right / aPref.getWidth();
+                tools::Long nBottom = aPixel.getHeight() * rCrop.Bottom / aPref.getHeight();
+                GstElement* pVideoFilter = gst_element_factory_make("videocrop", nullptr);
+                if (pVideoFilter)
+                {
+                    g_object_set(G_OBJECT(pVideoFilter), "left", nLeft, nullptr);
+                    g_object_set(G_OBJECT(pVideoFilter), "top", nTop, nullptr);
+                    g_object_set(G_OBJECT(pVideoFilter), "right", nRight, nullptr);
+                    g_object_set(G_OBJECT(pVideoFilter), "bottom", nBottom, nullptr);
+                    g_object_set(G_OBJECT(mpPlaybin), "video-filter", pVideoFilter, nullptr);
+                }
+            }
+        }
+
+        if (!mbUseGtkSink)
+        {
+            mnWindowID = pEnvData->GetWindowHandle(pParentWindow->ImplGetFrame());
+            mpDisplay = pEnvData->pDisplay;
+            SAL_INFO( "avmedia.gstreamer", AVVERSION "set window id to " << static_cast<int>(mnWindowID) << " XOverlay " << mpXOverlay);
+        }
+        gst_element_set_state( mpPlaybin, GST_STATE_PAUSED );
+        if (!mbUseGtkSink && mpXOverlay)
+            gst_video_overlay_set_window_handle( mpXOverlay, mnWindowID );
+    }
+
+    return xRet;
+}
+
+uno::Reference< media::XFrameGrabber > SAL_CALL Player::createFrameGrabber()
+{
+    ::osl::MutexGuard aGuard(m_aMutex);
+    rtl::Reference<FrameGrabber> pFrameGrabber;
+    const awt::Size aPrefSize( getPreferredPlayerWindowSize() );
+
+    if( ( aPrefSize.Width > 0 ) && ( aPrefSize.Height > 0 ) )
+        pFrameGrabber = FrameGrabber::create( maURL );
+    SAL_INFO( "avmedia.gstreamer", AVVERSION "created FrameGrabber " << pFrameGrabber.get() );
+
+    return pFrameGrabber;
+}
+
+
+OUString SAL_CALL Player::getImplementationName()
+{
+    return AVMEDIA_GST_PLAYER_IMPLEMENTATIONNAME;
+}
+
+
+sal_Bool SAL_CALL Player::supportsService( const OUString& ServiceName )
+{
+    return cppu::supportsService(this, ServiceName);
+}
+
+
+uno::Sequence< OUString > SAL_CALL Player::getSupportedServiceNames()
+{
+    return { AVMEDIA_GST_PLAYER_SERVICENAME };
+}
+
+} // namespace
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */