ImageClipWorkflow.cpp 4.05 KB
Newer Older
1 2 3
/*****************************************************************************
 * ImageClipWorkflow.cpp : Will extract a frame from an image
 *****************************************************************************
Ludovic Fauvet's avatar
Ludovic Fauvet committed
4
 * Copyright (C) 2008-2010 VideoLAN
5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23
 *
 * Authors: Hugo Beauzee-Luyssen <hugo@vlmc.org>
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
 *****************************************************************************/

#include "ImageClipWorkflow.h"
24
#include "Clip.h"
25
#include "ClipHelper.h"
26
#include "MainWorkflow.h"
27
#include "Media.h"
28
#include "VLCMediaPlayer.h"
29
#include "VLCMedia.h"
30
#include "Workflow/Types.h"
31

32 33
ImageClipWorkflow::ImageClipWorkflow( ClipHelper *ch ) :
        ClipWorkflow( ch ),
34
        m_buffer( NULL )
35
{
36 37 38 39
    //This is used to queue the media player stopping, as it can't be asked for
    //from vlc's input thread (well it can but it will deadlock)
    connect( this, SIGNAL( computedFinished() ),
             this, SLOT( stopComputation() ), Qt::QueuedConnection );
40 41
}

42 43 44 45 46
ImageClipWorkflow::~ImageClipWorkflow()
{
    stop();
}

47 48
void
ImageClipWorkflow::initVlcOutput()
49 50 51
{
    char    buffer[32];

52 53 54 55 56 57
    m_vlcMedia->addOption( ":no-audio" );
    m_vlcMedia->addOption( ":no-sout-audio" );
    m_vlcMedia->addOption( ":sout=#transcode{}:smem" );
    m_vlcMedia->setVideoDataCtx( this );
    m_vlcMedia->setVideoLockCallback( reinterpret_cast<void*>( getLockCallback() ) );
    m_vlcMedia->setVideoUnlockCallback( reinterpret_cast<void*>( getUnlockCallback() ) );
58
    m_vlcMedia->addOption( ":sout-transcode-vcodec=RV32" );
59 60 61 62 63 64 65 66 67 68
    m_vlcMedia->addOption( ":sout-smem-time-sync" );

    sprintf( buffer, ":sout-transcode-width=%i",
             MainWorkflow::getInstance()->getWidth() );
    m_vlcMedia->addOption( buffer );
    sprintf( buffer, ":sout-transcode-height=%i",
             MainWorkflow::getInstance()->getHeight() );
    m_vlcMedia->addOption( buffer );
    sprintf( buffer, ":sout-transcode-fps=%f", (float)Clip::DefaultFPS );
    m_vlcMedia->addOption( buffer );
69
    sprintf( buffer, ":fake-duration=%d", 1000 );
70
    m_vlcMedia->addOption( buffer );
71
    sprintf( buffer, ":fake-fps=%f", m_clipHelper->clip()->getMedia()->fps() );
72 73
    m_vlcMedia->addOption( buffer );
}
74 75

void*
Hugo Beauzee-Luyssen's avatar
Hugo Beauzee-Luyssen committed
76
ImageClipWorkflow::getLockCallback() const
77 78 79 80 81
{
    return reinterpret_cast<void*>( &ImageClipWorkflow::lock );
}

void*
Hugo Beauzee-Luyssen's avatar
Hugo Beauzee-Luyssen committed
82
ImageClipWorkflow::getUnlockCallback() const
83 84 85 86 87 88 89 90 91
{
    return reinterpret_cast<void*>( &ImageClipWorkflow::unlock );
}

void*
ImageClipWorkflow::getOutput( ClipWorkflow::GetMode )
{
    QMutexLocker    lock( m_renderLock );

92
    return m_buffer;
93 94 95
}

void
96
ImageClipWorkflow::lock(ImageClipWorkflow *cw, void **pp_ret, int )
97 98 99 100
{
    cw->m_renderLock->lock();
    if ( cw->m_buffer == NULL )
    {
101
        cw->m_buffer = new Workflow::Frame( MainWorkflow::getInstance()->getWidth(),
102
                                            MainWorkflow::getInstance()->getHeight() );
103
    }
104
    *pp_ret = cw->m_buffer->buffer();
105 106 107
}

void
108
ImageClipWorkflow::unlock(ImageClipWorkflow *cw, void*, int, int, int, int, qint64 )
109 110 111 112 113
{
    cw->m_renderLock->unlock();
    cw->emit computedFinished();
}

114
quint32
115 116 117 118 119 120 121 122 123
ImageClipWorkflow::getNbComputedBuffers() const
{
    QMutexLocker    lock( m_renderLock );

    if ( m_buffer != NULL )
        return 1;
    return 0;
}

124
quint32
125 126 127 128 129 130 131 132 133 134 135
ImageClipWorkflow::getMaxComputedBuffers() const
{
    return 1;
}

void
ImageClipWorkflow::stopComputation()
{
    m_mediaPlayer->stop();
}

136 137 138 139
void
ImageClipWorkflow::flushComputedBuffers()
{
}