MuvinoMain Class Reference

This class implements the application logic of the main GUI class MuvinoMainDlg. More...

#include <muvinomain.hpp>

Inherits MuvinoMainDlg.

List of all members.

Public Slots
virtual void	fileNew ()
virtual void	fileOpen ()
virtual void	fileOpen (const QString &path)
virtual void	fileLoadVideo ()
virtual void	fileLoadVideo (const QString &path)
virtual void	fileExit ()
virtual void	fileSave ()
virtual void	fileSaveAs ()
virtual void	playerStart ()
virtual void	playerStop ()
virtual void	playerPlay ()
virtual void	playerBack3s ()
virtual void	setDisplayRateFromSlider (int value)
virtual void	playerAudioStateChange (int state)
virtual void	displayCurrentMediaTime (bool showSubSec=false)
	Display current media time in player and emit the currentMediaTimeEvent(const MP7Time &) signal.
void	closeVideo ()
	Close the video loaded by loadVideo().
bool	playVideo (const MP7Time &time=MP7Time())
	Start video play-back at a given absolute media time point.
virtual void	treeViewSelectItem (QListViewItem *item)
	Tree view item was selected.
virtual void	mp7DocModificationChange (bool m)
	Modification status of the MPEG-7 document has changed.
virtual void	treeViewSetSelected (MP7ListViewItem *item)
	Set selected item.
void	treeViewClicked (QListViewItem *item)
	Set the current tree view item and cause currentSlider to show the video segment containing the XML element item.
virtual void	mp7ElementValueChange ()
void	splitCurrentSegment ()
	Split current segment at current media time point.
void	setTitleImage ()
	Set the MPEG-7 TitleImage descriptor of the current segment to the current video frame.
Signals
void	currentMediaTimeEvent (const MP7Time &time)
Public Member Functions
bool	loadVideo (const char *filename, const char *demuxDir, MP4Decoder::eColorSpace colorSpace)
	Initialize the adaptor chain and the video widget for play-back of an MP4 encoded video.
bool	loadMP7Doc (const QString &filename)
	Load an MPEG-7 file in XML format.
int	checkMP7DocWithVideo ()
	Check MPEG-7 document with loaded video.
Protected Member Functions
void	setCaptionFromFile (const QString &file=QString::null, bool modified=false)
	Set the caption of this top-level widget according to the given filename.
virtual void	closeEvent (QCloseEvent *e)
	Window close event handler.
void	initMenuBar ()
void	resetVideoDisplay ()
	Reset the video widget to its default settings.
void	stopAudio ()
	Stop audio play-back.
void	stopVideoAudio ()
	Stop video and audio play-back.
void	pauseVideoAudio ()
	Pause video and audio play-back.
MP7Time	videoDuration () const
	Return the duration of the loaded video.
MP7Time	currentVideoTime () const
	Get current video media time stamp.
void	setCurrentVideoTimeLabel (const MP7Time &time, bool showSubSec=false)
	Set the current media time label to the given value.
void	setDisplayRateSlider (double rate)
	Set the display rate slider control to the given rate.
void	initMP7TreeView ()
	Initialize the MPEG-7 tree view widget.
bool	warnAndSaveMP7Doc ()
	Ask the user to save the current MPEG-7 document if it has been modified.
void	createMP7Doc (const MP7Time &duration)
	Create new MPEG-7 document with one video segment of given duration.
void	resetMP7ElementValue ()
	Reset the mp7ElementValue widget.
void	disableMP7ElementValue (bool disable)
	Disable the mp7ElementValue widget.
void	initSegmentNav ()
	Initialize the segmentNav widgets.
void	resetSegmentNav ()
	Reset the segmentNav widgets to show default values.

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Detailed Description

This class implements the application logic of the main GUI class MuvinoMainDlg.

The latter class has been generated using the Qt Designer.

Author:

Mario Taschwer

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Member Function Documentation

int MuvinoMain::checkMP7DocWithVideo (   )

Check MPEG-7 document with loaded video. If no MPEG-7 document has been loaded, a new one with an appropriate Video descriptor will be created. In case of discrepancy, a warning dialog will be shown to the user which lets him choose between opening a different MPEG-7 document, creating a new one (which is instantly performed), or cancelling the operation (which is implemented by the caller of this function). Returns: 0 if the current MPEG-7 document and the video are compatible. 1 if a new (compatible) MPEG-7 document has been created. 2 if the user chose to open a new MPEG-7 document. 3 if the user chose to cancel the operation.

void MuvinoMain::createMP7Doc (  const MP7Time &  duration  )  [protected]

Create new MPEG-7 document with one video segment of given duration. The existing MPEG-7 document will be deleted without warning!

MP7Time MuvinoMain::currentVideoTime (   )  const [protected]

Get current video media time stamp. Returns a default MP7Time object if the time stamp cannot be determined.

bool MuvinoMain::loadMP7Doc (  const QString &  filename  )

Load an MPEG-7 file in XML format. Returns: true on success, false on error.

bool MuvinoMain::loadVideo (  const char *  filename, const char *  demuxDir, MP4Decoder::eColorSpace  colorSpace )

Initialize the adaptor chain and the video widget for play-back of an MP4 encoded video. The resolution (width, height) needs to match the dimensions of #videoWidget. Parameters: filename  file name of MP4 encoded video. demuxDir  local directory where the demuxed elementary streams are to be stored. colorSpace  color space which the video should be converted to; must be one of: MP4Decoder::ColorSpaceGRAY8, MP4Decoder::ColorSpaceRGB24, MP4Decoder::ColorSpaceRGB32. Returns: true on success, false on error. See also: QLabelRenderer

virtual void MuvinoMain::mp7DocModificationChange (  bool  m  )  [virtual, slot]

Modification status of the MPEG-7 document has changed. Parameters: m  true means modified.

void MuvinoMain::pauseVideoAudio (   )  [protected]

Pause video and audio play-back. The DataChannel threads will eventually terminate, leaving the input stream open. This function does not wait for the DataChannel threads to terminate.

bool MuvinoMain::playVideo (  const MP7Time &  time = MP7Time()  )  [slot]

Start video play-back at a given absolute media time point. Parameters: time  media time point; an invalid (default) time point means "continue from current time point". Returns: true on success, false on error. See also: MP7Time::timePointIsValid()

void MuvinoMain::setCaptionFromFile (  const QString &  file = QString::null, bool  modified = false )  [protected]

Set the caption of this top-level widget according to the given filename. Parameters: file  file name (may be full path name), the directory path will not be displayed. modified  if true, an asterisk will be displayed to indicate that the document has been modified.

void MuvinoMain::setCurrentVideoTimeLabel (  const MP7Time &  time, bool  showSubSec = false )  [protected]

Set the current media time label to the given value. Parameters: time  media time point. showSubSec  determines whether sub-second fractions will be shown.

void MuvinoMain::setDisplayRateSlider (  double  rate  )  [protected]

Set the display rate slider control to the given rate. See also: #setDisplayRateFromSlider(int)

void MuvinoMain::splitCurrentSegment (   )  [slot]

Split current segment at current media time point. If there are child segments, the appropriate child segment will be splitted.

void MuvinoMain::stopAudio (   )  [protected]

Stop audio play-back. When this function returns, the audio DataChannel thread has terminated. Make sure that #globalTimer is not paused before calling this method.

void MuvinoMain::stopVideoAudio (   )  [protected]

Stop video and audio play-back. When this function returns, the video and audio DataChannel threads have terminated, and the input streams have been closed. Make sure that #globalTimer is not paused before calling this method.

void MuvinoMain::treeViewClicked (  QListViewItem *  item  )  [slot]

Set the current tree view item and cause currentSlider to show the video segment containing the XML element item. Parameters: item  must actually be of type MP7ListViewItem *.

MP7Time MuvinoMain::videoDuration (   )  const [protected]

Return the duration of the loaded video. If no video is loaded, a null time will be returned.

bool MuvinoMain::warnAndSaveMP7Doc (   )  [protected]

Ask the user to save the current MPEG-7 document if it has been modified. Save the document if the user chose to do so. A message box with 3 buttons will be displayed: Save, Discard, and Cancel. Returns: false if the user chose to cancel the operation; true otherwise.

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

• muvinomain.hpp

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