WorkflowRenderer.cpp 8.52 KB
Newer Older
1
/*****************************************************************************
2
 * WorkflowRenderer.cpp: Allow a current workflow preview
3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22
 *****************************************************************************
 * Copyright (C) 2008-2009 the VLMC team
 *
 * 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.
 *****************************************************************************/

23
#include <QtDebug>
24
#include <QThread>
25

26
#include "vlmc.h"
27
#include "WorkflowRenderer.h"
28
#include "Timeline.h"
29

30 31
WorkflowRenderer::WorkflowRenderer() :
            m_mainWorkflow( MainWorkflow::getInstance() ),
32
            m_stopping( false ),
33
            m_pauseAsked( false ),
34
            m_unpauseAsked( false )
35
{
36 37
    char        buffer[64];

38
    m_actionsLock = new QReadWriteLock;
39 40 41 42 43 44 45
    m_media = new LibVLCpp::Media( "fake://" );

    sprintf( buffer, ":invmem-width=%i", VIDEOWIDTH );
    m_media->addOption( ":codec=invmem" );
    m_media->addOption( buffer );
    sprintf( buffer, ":invmem-height=%i", VIDEOHEIGHT );
    m_media->addOption( buffer );
46
    sprintf( buffer, ":invmem-lock=%lld", (qint64)WorkflowRenderer::lock );
47
    m_media->addOption( buffer );
48
    sprintf( buffer, ":invmem-unlock=%lld", (qint64)WorkflowRenderer::unlock );
49 50 51
    m_media->addOption( buffer );
    sprintf( buffer, ":invmem-data=%lld", (qint64)this );
    m_media->addOption( buffer );
52 53 54 55 56
    sprintf( buffer, ":width=%i", VIDEOWIDTH );
    m_media->addOption( buffer );
    sprintf( buffer, ":height=%i", VIDEOHEIGHT );
    m_media->addOption( buffer );

57 58
    m_condMutex = new QMutex;
    m_waitCond = new QWaitCondition;
59 60
}

61

62
WorkflowRenderer::~WorkflowRenderer()
63
{
64
    stop();
65

66
    //FIXME this is probably useless...
67 68 69 70 71 72
    disconnect( m_mediaPlayer, SIGNAL( playing() ),    this,   SLOT( __videoPlaying() ) );
    disconnect( m_mediaPlayer, SIGNAL( paused() ),     this,   SLOT( __videoPaused() ) );
    disconnect( m_mediaPlayer, SIGNAL( stopped() ),    this,   SLOT( __videoStopped() ) );
    disconnect( m_mainWorkflow, SIGNAL( mainWorkflowEndReached() ), this, SLOT( __endReached() ) );
    disconnect( m_mainWorkflow, SIGNAL( positionChanged( float ) ), this, SLOT( __positionChanged( float ) ) );

73
    delete m_actionsLock;
74
    delete m_media;
75 76
    delete m_condMutex;
    delete m_waitCond;
77 78
}

79
void*   WorkflowRenderer::lock( void* datas )
80
{
81
    WorkflowRenderer* self = reinterpret_cast<WorkflowRenderer*>( datas );
82

83 84 85 86 87 88 89
    if ( self->m_stopping == false )
    {
        void* ret = self->m_mainWorkflow->getSynchroneOutput();
        self->m_lastFrame = static_cast<unsigned char*>( ret );
        return ret;
    }
    return self->m_lastFrame;
90 91
}

92
void    WorkflowRenderer::unlock( void* datas )
93
{
94
    WorkflowRenderer* self = reinterpret_cast<WorkflowRenderer*>( datas );
95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110
    self->checkActions();
}

void        WorkflowRenderer::checkActions()
{
    QReadLocker     lock( m_actionsLock );

    if ( m_actions.size() == 0 )
        return ;
    while ( m_actions.empty() == false )
    {
        Actions act = m_actions.top();
        m_actions.pop();
        switch ( act )
        {
            case    Pause:
111 112 113
                if ( m_pauseAsked == true )
                    continue ;
                m_pauseAsked = true;
114 115
//                m_mediaPlayer->pause();
                pauseMainWorkflow();
116 117 118 119 120 121 122
                //This will also pause the MainWorkflow via a signal/slot
                break ;
            default:
                qDebug() << "Unhandled action:" << act;
                break ;
        }
    }
123 124
}

125
void        WorkflowRenderer::startPreview()
126
{
127 128
    if ( m_mainWorkflow->getLength() <= 0 )
        return ;
129 130 131
    m_mediaPlayer->setMedia( m_media );

    //Workflow part
132
    connect( m_mainWorkflow, SIGNAL( frameChanged(qint64) ),
133
            Timeline::getInstance()->tracksView()->tracksCursor(), SLOT( setCursorPos( qint64 ) ), Qt::QueuedConnection );
134 135
    connect( Timeline::getInstance()->tracksView()->tracksCursor(), SIGNAL( cursorPositionChanged( qint64 ) ),
             this, SLOT( timelineCursorChanged(qint64) ) );
136
    connect( m_mainWorkflow, SIGNAL( mainWorkflowPaused() ), this, SLOT( mainWorkflowPaused() ) );
137
    connect( m_mainWorkflow, SIGNAL( mainWorkflowUnpaused() ), this, SLOT( mainWorkflowUnpaused() ) );
138

139 140 141 142 143 144 145
    //Media player part: to update PreviewWidget
    connect( m_mediaPlayer, SIGNAL( playing() ),    this,   SLOT( __videoPlaying() ), Qt::DirectConnection );
    connect( m_mediaPlayer, SIGNAL( paused() ),     this,   SLOT( __videoPaused() ), Qt::DirectConnection );
    connect( m_mediaPlayer, SIGNAL( stopped() ),    this,   SLOT( __videoStopped() ) );
    connect( m_mainWorkflow, SIGNAL( mainWorkflowEndReached() ), this, SLOT( __endReached() ) );
    connect( m_mainWorkflow, SIGNAL( positionChanged( float ) ), this, SLOT( __positionChanged( float ) ) );

146
    m_mainWorkflow->setFullSpeedRender( false );
147 148
    m_mainWorkflow->startRender();
    m_mediaPlayer->play();
149
    m_isRendering = true;
150
    m_paused = false;
151 152
    m_stopping = false;
    m_lastFrame = NULL;
153 154
}

155
void        WorkflowRenderer::setPosition( float newPos )
156
{
157
    m_mainWorkflow->setPosition( newPos );
158 159
}

160 161
void        WorkflowRenderer::nextFrame()
{
162
    m_mainWorkflow->nextFrame();
163 164
}

165
void        WorkflowRenderer::previousFrame()
166
{
167
    m_mainWorkflow->previousFrame();
168 169
}

170 171
void        WorkflowRenderer::pauseMainWorkflow()
{
172 173
    if ( m_paused == true )
        return ;
174 175

    QMutexLocker    lock( m_condMutex );
176
    m_mainWorkflow->pause();
177
    m_waitCond->wait( m_condMutex );
178 179
}

180 181 182 183 184 185 186
void        WorkflowRenderer::unpauseMainWorkflow()
{
    if ( m_paused == false )
        return ;
    m_mainWorkflow->unpause();
}

187 188
void        WorkflowRenderer::mainWorkflowPaused()
{
189
    m_paused = true;
190
    m_pauseAsked = false;
191 192 193 194
    {
        QMutexLocker    lock( m_condMutex );
    }
    m_waitCond->wakeAll();
195
    emit paused();
196 197
}

198 199 200 201 202 203 204
void        WorkflowRenderer::mainWorkflowUnpaused()
{
    m_paused = false;
    m_unpauseAsked = false;
    emit playing();
}

205
void        WorkflowRenderer::togglePlayPause( bool forcePause )
206
{
207
    if ( m_isRendering == false && forcePause == false )
208
        startPreview();
209 210 211 212 213 214 215 216
    else
        internalPlayPause( forcePause );
}

void        WorkflowRenderer::internalPlayPause( bool forcePause )
{
    //If force pause is true, we just ensure that this render is paused... no need to start it.
    if ( m_isRendering == true )
217
    {
218 219
        if ( m_paused == true && forcePause == false )
        {
220 221 222
            if ( m_paused == true )
            {
                m_unpauseAsked = true;
223
                unpauseMainWorkflow();
224
            }
225
        }
226
        else
227
        {
228 229
            if ( m_paused == false )
            {
230 231
                QWriteLocker        lock( m_actionsLock );
                m_actions.push( Pause );
232
            }
233
        }
234
    }
235
}
236

237
void        WorkflowRenderer::stop()
238 239
{
    m_isRendering = false;
240
    m_paused = false;
241
    m_pauseAsked = false;
242
    m_unpauseAsked = false;
243
    m_stopping = true;
244
    m_mainWorkflow->cancelSynchronisation();
245
    m_mediaPlayer->stop();
246
    m_mainWorkflow->stop();
247 248
}

249 250 251 252
/////////////////////////////////////////////////////////////////////
/////SLOTS :
/////////////////////////////////////////////////////////////////////

253
void        WorkflowRenderer::__endReached()
254
{
255
    stop();
256
    emit endReached();
257 258
}

259
void        WorkflowRenderer::__positionChanged()
260
{
261 262 263
    qFatal("This should never be used ! Get out of here !");
}

264
void        WorkflowRenderer::__positionChanged( float pos )
265 266
{
    emit positionChanged( pos );
267 268
}

269
void        WorkflowRenderer::__videoPaused()
270
{
271 272
    if ( m_pauseAsked == true )
        pauseMainWorkflow();
273 274
}

275
void        WorkflowRenderer::__videoPlaying()
276
{
277 278 279 280 281 282 283
    if ( m_unpauseAsked == true )
        unpauseMainWorkflow();
    else
    {
        m_paused = false;
        emit playing();
    }
284
}
285

286
void        WorkflowRenderer::__videoStopped()
287 288 289
{
    emit endReached();
}
290 291 292 293 294

void        WorkflowRenderer::timelineCursorChanged( qint64 newFrame )
{
    m_mainWorkflow->setCurrentFrame( newFrame );
}