1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
|
/* -*- 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/bmpacc.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 "vlcframegrabber.hxx"
#include "vlcplayer.hxx"
#include "wrapper/Player.hxx"
#include "wrapper/EventManager.hxx"
using namespace ::com::sun::star;
namespace avmedia {
namespace vlc {
namespace
{
const ::rtl::OUString AVMEDIA_VLC_GRABBER_IMPLEMENTATIONNAME = "com.sun.star.comp.avmedia.VLCFrameGrabber_VLC";
const ::rtl::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 rtl::OUString& url )
: FrameGrabber_BASE()
, mInstance( sizeof( VLC_ARGS ) / sizeof( VLC_ARGS[0] ), VLC_ARGS )
, mMedia( url, mInstance )
, mPlayer( mMedia )
, mEventHandler( eh )
{
}
::uno::Reference< css::graphic::XGraphic > SAL_CALL VLCFrameGrabber::grabFrame( double fMediaTime )
throw ( css::uno::RuntimeException, std::exception )
{
osl::Condition condition;
const rtl::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( ( fMediaTime > 0 ? fMediaTime : 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();
}
rtl::OUString url;
osl::FileBase::getFileURLFromSystemPath( fileName, url );
std::shared_ptr<SvStream> stream( utl::UcbStreamHelper::CreateStream( url,
STREAM_STD_READ ) );
vcl::PNGReader reader( *stream );
const BitmapEx& bitmap = reader.Read();
return Graphic( bitmap ).GetXGraphic();
}
::rtl::OUString SAL_CALL VLCFrameGrabber::getImplementationName() throw ( css::uno::RuntimeException, std::exception )
{
return AVMEDIA_VLC_GRABBER_IMPLEMENTATIONNAME;
}
sal_Bool SAL_CALL VLCFrameGrabber::supportsService( const ::rtl::OUString& serviceName )
throw ( css::uno::RuntimeException, std::exception )
{
return cppu::supportsService(this, serviceName);
}
::uno::Sequence< ::rtl::OUString > SAL_CALL VLCFrameGrabber::getSupportedServiceNames()
throw ( css::uno::RuntimeException, std::exception )
{
::uno::Sequence< OUString > aRet { AVMEDIA_VLC_GRABBER_SERVICENAME };
return aRet;
}
}
}
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
|
