1 files changed, 131 insertions, 0 deletions
diff --git a/avmedia/source/vlc/vlcframegrabber.cxx b/avmedia/source/vlc/vlcframegrabber.cxx
new file mode 100644
index 000000000..034de4511
--- /dev/null
+++ b/avmedia/source/vlc/vlcframegrabber.cxx
@@ -0,0 +1,131 @@
+/* -*- 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 <chrono>
+#include <iostream>
+#include <osl/conditn.hxx>
+#include <osl/file.hxx>
+#include <vcl/graph.hxx>
+#include <vcl/bitmapaccess.hxx>
+#include <vcl/pngread.hxx>
+#include <avmedia/mediawindow.hxx>
+#include <unotools/tempfile.hxx>
+#include <unotools/ucbstreamhelper.hxx>
+#include <tools/stream.hxx>
+#include <cppuhelper/supportsservice.hxx>
+#include <sal/log.hxx>
+
+#include "vlcframegrabber.hxx"
+#include "vlcplayer.hxx"
+#include <wrapper/Player.hxx>
+#include <wrapper/EventManager.hxx>
+
+using namespace ::com::sun::star;
+
+namespace avmedia::vlc {
+
+namespace
+{
+    const OUString AVMEDIA_VLC_GRABBER_IMPLEMENTATIONNAME = "com.sun.star.comp.avmedia.VLCFrameGrabber_VLC";
+    const OUString AVMEDIA_VLC_GRABBER_SERVICENAME = "com.sun.star.media.VLCFrameGrabber_VLC";
+    const int MSEC_IN_SEC = 1000;
+
+    const char * const VLC_ARGS[] = {
+        "-Vdummy",
+        "--demux",
+        "ffmpeg",
+        "--snapshot-format=png",
+        "--ffmpeg-threads", /* Is deprecated in 2.1.0 */
+        "--verbose=-1",
+        "--no-audio"
+    };
+}
+
+VLCFrameGrabber::VLCFrameGrabber( wrapper::EventHandler& eh, const OUString& url )
+    : FrameGrabber_BASE()
+    , mInstance( SAL_N_ELEMENTS(VLC_ARGS), VLC_ARGS )
+    , mMedia( url, mInstance )
+    , mPlayer( mMedia )
+    , mEventHandler( eh )
+{
+}
+
+::uno::Reference< css::graphic::XGraphic > SAL_CALL VLCFrameGrabber::grabFrame( double fMediaTime )
+{
+    osl::Condition condition;
+
+    const OUString& fileName = utl::TempFile::CreateTempName();
+    {
+        wrapper::EventManager manager( mPlayer, mEventHandler );
+        manager.onPaused([&condition](){ condition.set(); });
+
+        if ( !mPlayer.play() )
+        {
+            SAL_WARN("avmedia", "Couldn't play when trying to grab frame");
+            return ::uno::Reference< css::graphic::XGraphic >();
+        }
+
+        mPlayer.setTime( std::max(fMediaTime, 0.0) * MSEC_IN_SEC );
+        mPlayer.pause();
+
+        condition.wait(std::chrono::seconds(2));
+
+        if ( !mPlayer.hasVout() )
+        {
+            SAL_WARN("avmedia", "Couldn't grab frame");
+            manager.onPaused();
+            return ::uno::Reference< css::graphic::XGraphic >();
+        }
+
+        mPlayer.takeSnapshot( fileName );
+        mPlayer.stop();
+
+        manager.onPaused();
+    }
+
+    OUString url;
+    osl::FileBase::getFileURLFromSystemPath( fileName, url );
+    std::unique_ptr<SvStream> stream( utl::UcbStreamHelper::CreateStream( url,
+                                                                            StreamMode::STD_READ ) );
+
+    vcl::PNGReader reader( *stream );
+
+    const BitmapEx& bitmap = reader.Read();
+
+    return Graphic( bitmap ).GetXGraphic();
+}
+
+OUString SAL_CALL VLCFrameGrabber::getImplementationName()
+{
+    return AVMEDIA_VLC_GRABBER_IMPLEMENTATIONNAME;
+}
+
+sal_Bool SAL_CALL VLCFrameGrabber::supportsService( const OUString& serviceName )
+{
+    return cppu::supportsService(this, serviceName);
+}
+
+::uno::Sequence< OUString > SAL_CALL VLCFrameGrabber::getSupportedServiceNames()
+{
+    return { AVMEDIA_VLC_GRABBER_SERVICENAME };
+}
+
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */