AnimationSaveWidget Class Reference

Inheritance diagram for AnimationSaveWidget:

[legend]Collaboration diagram for AnimationSaveWidget:

[legend]List of all members.

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Detailed Description

Definition at line 112 of file qvfb.cpp.

Public Member Functions
	AnimationSaveWidget (QVFbView *v)
	~AnimationSaveWidget ()
bool	detectPpmtoMpegCommand ()
void	timerEvent (QTimerEvent *te)
void	convertToMpeg (QString filename)
void	removeTemporaryFiles ()
Protected Slots
void	toggleRecord ()
void	reset ()
void	save ()
Private Attributes
QVFbView *	view
QProgressBar *	progressBar
QLabel *	statusText
bool	haveMpeg
bool	savingAsMpeg
bool	recording
QCheckBox *	mpegSave
QAnimationWriter *	animation
QPushButton *	recBt
QPushButton *	resetBt
QPushButton *	saveBt
QLabel *	timeDpy
QLabel *	recLED
int	timerId
int	progressTimerId
QPixmap	recOn
QPixmap	recOff
QTime	tm
int	elapsed
int	imageNum

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Constructor & Destructor Documentation

AnimationSaveWidget::AnimationSaveWidget

(

QVFbView *

v

)

Definition at line 713 of file qvfb.cpp.

References QBoxLayout::addWidget(), QObject::connect(), detectPpmtoMpegCommand(), elapsed, haveMpeg, QWidget::hide(), mpegSave, progressBar, QWidget::QWidget(), recBt, recLED, recOff, reset(), resetBt, save(), saveBt, savingAsMpeg, QAbstractButton::setChecked(), QWidget::setEnabled(), QWidget::setFixedWidth(), QLabel::setMargin(), QLayout::setMargin(), QLabel::setPixmap(), QLayout::setSpacing(), QProgressBar::setValue(), SIGNAL, SLOT, statusText, timeDpy, and toggleRecord().

                                                    :
  QWidget((QWidget*)0,0),
  view(v), recording(false), animation(0),
  timerId(-1), progressTimerId(-1),
  recOn(red_on_led_xpm), recOff(red_off_led_xpm),
  imageNum(0)
{
    // Create the animation record UI dialog
    QVBoxLayout *vlayout = new QVBoxLayout( this );

    QWidget *hbox = new QWidget( this );
    vlayout->addWidget(hbox);
    QHBoxLayout *hlayout = new QHBoxLayout(hbox);
    recBt = new QPushButton( tr("Record"), hbox );
    hlayout->addWidget(recBt);
    resetBt = new QPushButton( tr("Reset"), hbox );
    hlayout->addWidget(resetBt);
    saveBt = new QPushButton( tr("Save"), hbox );
    hlayout->addWidget(saveBt);
    recBt->setFixedWidth( 100 );
    resetBt->setFixedWidth( 100 );
    saveBt->setFixedWidth( 100 );
    timeDpy = new QLabel( "00:00", hbox );
    hlayout->addWidget(timeDpy);
    recLED = new QLabel( hbox );
    hlayout->addWidget(recLED);
    recLED->setPixmap( recOff );
    timeDpy->setMargin( 5 );
    connect( recBt, SIGNAL(clicked()), this, SLOT(toggleRecord()) );
    connect( resetBt, SIGNAL(clicked()), this, SLOT(reset()) );
    connect( saveBt, SIGNAL(clicked()), this, SLOT(save()) );
    elapsed = 0;
    vlayout->setMargin( 5 );
    vlayout->setSpacing( 5 );
    haveMpeg = detectPpmtoMpegCommand();
    mpegSave = new QCheckBox( tr("Save in MPEG format (requires netpbm package installed)"), this );
    vlayout->addWidget(mpegSave);
    mpegSave->setChecked( haveMpeg );
    mpegSave->setEnabled( haveMpeg );
    savingAsMpeg = haveMpeg;
    QWidget *hbox2 = new QWidget( this );
    vlayout->addWidget(hbox2);
    QHBoxLayout *hlayout2 = new QHBoxLayout( hbox2 );
    statusText = new QLabel( tr("Click record to begin recording."), hbox2 );
    hlayout2->addWidget(statusText);
    progressBar = new QProgressBar( hbox2 );
    progressBar->setValue( 0 );
    hlayout2->addWidget(progressBar);
    progressBar->hide();
}

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AnimationSaveWidget::~AnimationSaveWidget

(

)

Definition at line 764 of file qvfb.cpp.

References animation, and removeTemporaryFiles().

{
    // clean up
    removeTemporaryFiles();
    delete animation;
}

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Member Function Documentation

bool AnimationSaveWidget::detectPpmtoMpegCommand

(

)

Definition at line 772 of file qvfb.cpp.

References QList< T >::count(), QFile::exists(), and i.

Referenced by AnimationSaveWidget().

{
    // search the PATH for the ppmtompeg command to test we can record to mpeg
    QStringList paths = QString(::getenv("PATH")).split(":");
    for ( int i = 0; i < paths.count(); i++ )
  if ( QFile::exists( paths[i] + "/" + "ppmtompeg" ) )
      return true;
    return false;
}

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void AnimationSaveWidget::timerEvent

(

QTimerEvent *

te

)

[virtual]

This event handler can be reimplemented in a subclass to receive timer events for the object.

QTimer provides a higher-level interface to the timer functionality, and also more general information about timers. The timer event is passed in the event parameter.

See also:

startTimer(), killTimer(), event()

Reimplemented from QObject.

Definition at line 782 of file qvfb.cpp.

References animation, QAnimationWriter::appendFrame(), buffer, QTime::elapsed(), QWidget::hide(), QVFbView::image(), imageNum, QString::indexOf(), QObject::killTimer(), QString::left(), QString::mid(), num, progressBar, progressTimerId, QIODevice::ReadOnly, recLED, recOff, recOn, removeTemporaryFiles(), reset(), QImage::save(), savingAsMpeg, QLabel::setPixmap(), QLabel::setText(), QProgressBar::setValue(), QString::sprintf(), statusText, timeDpy, QObject::timerEvent(), QTimerEvent::timerId(), timerId, tm, and view.

{
    QString str;

    // Recording timer
    if ( te->timerId() == timerId ) {

  // Add a frame to the animation
  if ( savingAsMpeg && view )
      view->image().save( str.sprintf("/tmp/qvfb_tmp_image_%04d.ppm", imageNum), "PPM");
  else if ( animation && view )
      animation->appendFrame(view->image());//QPoint(0,0));
  imageNum++;

  // Update the display of number of seconds that have been recorded.
  int tmMsec = tm.elapsed();
  timeDpy->setText( str.sprintf("%02d:%02d", tmMsec/60000, (tmMsec%60000)/1000) );
  QObject::timerEvent( te );

  // Make the recording LED blink
  static int tick = 0;
  static bool on = false;
  if ( tick > 10 ) {
      tick = 0;
      if ( on )
    recLED->setPixmap( recOff );
      else
    recLED->setPixmap( recOn );
      on = !on;
  }
  tick++;
    }

    // Saving progress timer
    if ( te->timerId() == progressTimerId ) {
  // Parse output log file to work out the encoding progress.
  QFile f("/tmp/qvfb_tmp_output.log");
  f.open(QIODevice::ReadOnly);
  int largestNum = 0;
  bool done = false;
  char buffer[1024];
  while ( !f.atEnd() ) {
      // example of the output log entries
      //   During each frame:
      //      "FRAME 764 (B):  I BLOCKS:  0......
      //   When complete:
      //      "======FRAMES READ:  766"
      f.readLine(buffer, 1024);
      str = QString(buffer);
      if ( str.left(6) == "FRAME " ) {
    int num = str.mid(6, str.indexOf(QChar(' '), 6) - 6).toInt();
    if ( num > largestNum )
        largestNum = num;
      } else if ( str.left(18) == "======FRAMES READ:" ) {
    done = true;
      }
  }
  f.close();

  // Update the progress bar with the frame we are up to
  progressBar->setValue( largestNum );

  // Finished saving
  if ( done ) {
      progressBar->hide();
      statusText->setText( tr("Finished saving."));
      removeTemporaryFiles();
      killTimer( progressTimerId );
      progressTimerId = -1;
      reset();
  }
    }
}

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void AnimationSaveWidget::convertToMpeg

(

QString

filename

)

Definition at line 857 of file qvfb.cpp.

References QFile::close(), imageNum, QObject::killTimer(), QFile::open(), progressBar, progressTimerId, recLED, recOff, QLabel::setPixmap(), QProgressBar::setRange(), QProgressBar::setValue(), QWidget::show(), QString::sprintf(), QObject::startTimer(), t, timerId, and QIODevice::WriteOnly.

Referenced by save().

{
    recLED->setPixmap( recOff );
    killTimer( timerId );

    progressBar->show();
    progressBar->setRange( 0, imageNum );
    progressBar->setValue( 0 );

    // Build parameter file required by ppmtompeg
    QFile file("/tmp/qvfb_tmp_ppmtompeg.params");
    if ( file.open( QIODevice::WriteOnly ) ) {
  QTextStream t( &file );
  t << "PATTERN IBBPBBPBBPBBPBB\n";
  t << "OUTPUT " << filename << "\n";
  t << "INPUT_DIR /tmp\n";
  t << "INPUT\n";
  QString str;
  str = str.sprintf("%04d", imageNum - 1);
  t << "qvfb_tmp_image_*.ppm [0000-" << str << "]\n";
  t << "END_INPUT\n";
  t << "BASE_FILE_FORMAT PPM\n";
  t << "INPUT_CONVERT *\n";
  t << "GOP_SIZE 15\n";
  t << "SLICES_PER_FRAME 1\n";
  t << "PIXEL HALF\n";
  t << "RANGE 5\n";
  t << "PSEARCH_ALG LOGARITHMIC\n";
  t << "BSEARCH_ALG SIMPLE\n";
  t << "IQSCALE 1\n";
  t << "PQSCALE 1\n";
  t << "BQSCALE 1\n";
  t << "REFERENCE_FRAME DECODED\n";
  t << "ASPECT_RATIO 1\n";
  t << "FRAME_RATE 24\n";
  t << "BIT_RATE 64000\n";      // Quality
  t << "BUFFER_SIZE 2048\n";
    }
    file.close();

    // ### can't use QProcess, not in Qt 2.3
    // Execute the ppmtompeg command as a seperate process to do the encoding
    pid_t pid = ::fork();
    if ( !pid ) {
  // Child process
  // redirect stdout to log file
  freopen("/tmp/qvfb_tmp_output.log", "w", stdout);
  // ppmtompeg tool is from the netpbm package
  ::execlp("ppmtompeg", "ppmtompeg", "/tmp/qvfb_tmp_ppmtompeg.params", (void *)0);
  exit(0);
    }

    // Update the saving progress bar every 200ms
    progressTimerId = startTimer( 200 );
}

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void AnimationSaveWidget::removeTemporaryFiles

(

)

Definition at line 914 of file qvfb.cpp.

References i, imageNum, QFile::remove(), and QString::sprintf().

Referenced by reset(), timerEvent(), and ~AnimationSaveWidget().

{
    QString str;
    for ( int i = 0; i < imageNum; i++ )
  QFile::remove( str.sprintf("/tmp/qvfb_tmp_image_%04d.ppm", i) );
    QFile::remove("/tmp/qvfb_tmp_ppmtompeg.params");
    QFile::remove("/tmp/qvfb_tmp_output.log");
    imageNum = 0;
}

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void AnimationSaveWidget::toggleRecord

(

)

[protected, slot]

Definition at line 925 of file qvfb.cpp.

References QTime::addMSecs(), animation, QAnimationWriter::appendFrame(), elapsed, QTime::elapsed(), QVFbView::image(), QAbstractButton::isChecked(), QObject::killTimer(), mpegSave, recBt, recLED, recOff, recOn, recording, savingAsMpeg, QAnimationWriter::setFrameRate(), QLabel::setPixmap(), QAbstractButton::setText(), QLabel::setText(), QTime::start(), QObject::startTimer(), statusText, timerId, tm, and view.

Referenced by AnimationSaveWidget(), reset(), and save().

{
    if ( recording ) {
  recLED->setPixmap( recOff );
  recBt->setText( tr("Record") );
  statusText->setText( tr("Paused. Click record to resume, or save if done."));
  killTimer( timerId );
  timerId = -1;
  elapsed = tm.elapsed();
    } else {
  recLED->setPixmap( recOn );
  recBt->setText( tr("Pause") );
  statusText->setText( tr("Recording..."));
  tm.start();
  if ( elapsed == 0 ) {
      savingAsMpeg = mpegSave->isChecked();
      if ( !savingAsMpeg ) {
    delete animation;
    animation = new QAnimationWriter("/tmp/qvfb_tmp_animation.mng","MNG");
    animation->setFrameRate(24);
    if ( view )
        animation->appendFrame(view->image());
      }
  }
  tm = tm.addMSecs(-elapsed);
  elapsed = 0;
  timerId = startTimer(1000 / 24);
    }
    recording = !recording;
}

void AnimationSaveWidget::reset

(

)

[protected, slot]

Definition at line 957 of file qvfb.cpp.

References animation, elapsed, imageNum, progressBar, recording, removeTemporaryFiles(), QLabel::setText(), QProgressBar::setValue(), statusText, timeDpy, and toggleRecord().

Referenced by AnimationSaveWidget(), save(), and timerEvent().

{
    if ( recording ) {
  toggleRecord();
  statusText->setText( tr("Click record to begin recording."));
  removeTemporaryFiles();
    }
    progressBar->setValue( 0 );
    timeDpy->setText( "00:00" );
    elapsed = 0;
    imageNum = 0;
    delete animation;
    animation = 0;
}

void AnimationSaveWidget::save

(

)

[protected, slot]

Definition at line 973 of file qvfb.cpp.

References convertToMpeg(), QFileDialog::getSaveFileName(), QString::isNull(), recording, QFile::remove(), QFile::rename(), reset(), savingAsMpeg, QLabel::setText(), statusText, and toggleRecord().

Referenced by AnimationSaveWidget().

{
    if ( recording )
  toggleRecord(); // pauses
    statusText->setText( tr("Saving... "));

    QString filename;
    if ( savingAsMpeg ) {
  filename = QFileDialog::getSaveFileName(this, tr("Save animation..."), "", "*.mpg");
  if ( !filename.isNull() )
      convertToMpeg(filename);
    } else {
  filename = QFileDialog::getSaveFileName(this, tr("Save animation..."), "", "*.mng");
  if (filename.isNull()) {
            statusText->setText(tr("Save canceled."));
        } else {
            QFile::remove(filename);
            bool success = QFile::rename(QLatin1String("/tmp/qvfb_tmp_animation.mng"),
                                         filename);
            if (success) {
                statusText->setText(tr("Finished saving."));
                reset();
            } else {
                statusText->setText(tr("Save failed!"));
            }
  }
    }
}

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Member Data Documentation

QVFbView* AnimationSaveWidget::view [private]

Definition at line 126 of file qvfb.cpp.

Referenced by timerEvent(), and toggleRecord().

QProgressBar* AnimationSaveWidget::progressBar [private]

Definition at line 127 of file qvfb.cpp.

Referenced by AnimationSaveWidget(), convertToMpeg(), reset(), and timerEvent().

QLabel* AnimationSaveWidget::statusText [private]

Definition at line 128 of file qvfb.cpp.

Referenced by AnimationSaveWidget(), reset(), save(), timerEvent(), and toggleRecord().

bool AnimationSaveWidget::haveMpeg [private]

Definition at line 129 of file qvfb.cpp.

Referenced by AnimationSaveWidget().

bool AnimationSaveWidget::savingAsMpeg [private]

Definition at line 129 of file qvfb.cpp.

Referenced by AnimationSaveWidget(), save(), timerEvent(), and toggleRecord().

bool AnimationSaveWidget::recording [private]

Definition at line 129 of file qvfb.cpp.

Referenced by reset(), save(), and toggleRecord().

QCheckBox* AnimationSaveWidget::mpegSave [private]

Definition at line 130 of file qvfb.cpp.

Referenced by AnimationSaveWidget(), and toggleRecord().

QAnimationWriter* AnimationSaveWidget::animation [private]

Definition at line 131 of file qvfb.cpp.

Referenced by reset(), timerEvent(), toggleRecord(), and ~AnimationSaveWidget().

QPushButton* AnimationSaveWidget::recBt [private]

Definition at line 132 of file qvfb.cpp.

Referenced by AnimationSaveWidget(), and toggleRecord().

QPushButton * AnimationSaveWidget::resetBt [private]

Definition at line 132 of file qvfb.cpp.

Referenced by AnimationSaveWidget().

QPushButton * AnimationSaveWidget::saveBt [private]

Definition at line 132 of file qvfb.cpp.

Referenced by AnimationSaveWidget().

QLabel* AnimationSaveWidget::timeDpy [private]

Definition at line 133 of file qvfb.cpp.

Referenced by AnimationSaveWidget(), reset(), and timerEvent().

QLabel * AnimationSaveWidget::recLED [private]

Definition at line 133 of file qvfb.cpp.

Referenced by AnimationSaveWidget(), convertToMpeg(), timerEvent(), and toggleRecord().

int AnimationSaveWidget::timerId [private]

Definition at line 134 of file qvfb.cpp.

Referenced by convertToMpeg(), timerEvent(), and toggleRecord().

int AnimationSaveWidget::progressTimerId [private]

Definition at line 134 of file qvfb.cpp.

Referenced by convertToMpeg(), and timerEvent().

QPixmap AnimationSaveWidget::recOn [private]

Definition at line 135 of file qvfb.cpp.

Referenced by timerEvent(), and toggleRecord().

QPixmap AnimationSaveWidget::recOff [private]

Definition at line 135 of file qvfb.cpp.

Referenced by AnimationSaveWidget(), convertToMpeg(), timerEvent(), and toggleRecord().

QTime AnimationSaveWidget::tm [private]

Definition at line 136 of file qvfb.cpp.

Referenced by timerEvent(), and toggleRecord().

int AnimationSaveWidget::elapsed [private]

Definition at line 137 of file qvfb.cpp.

Referenced by AnimationSaveWidget(), reset(), and toggleRecord().

int AnimationSaveWidget::imageNum [private]

Definition at line 137 of file qvfb.cpp.

Referenced by convertToMpeg(), removeTemporaryFiles(), reset(), and timerEvent().

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The documentation for this class was generated from the following file:

• tools/qvfb/qvfb.cpp

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