/// <summary>
/// Initializes the cdg library
/// </summary>
/// <param name="playlistItem"></param>
private void InitializeCdgLibrary(PlaylistItem playlistItem)
{
IntPtr applicationHandle = new WindowInteropHelper(Application.Current.MainWindow).Handle;
IntPtr parentWindowHandle = new WindowInteropHelper(_videoPlayerWindow).Handle;
string mp3FilePath = playlistItem.Song.FilePath;
string cdgFilePath = playlistItem.Song.CdgFilePath;
if (playlistItem.Song.Extension.Equals("zip"))
{
_zipFileHelper = new ZipFileHelper();
Song tmpUnzippedSong = _zipFileHelper.ExtractFileTemporarily(mp3FilePath);
mp3FilePath = tmpUnzippedSong.FilePath;
cdgFilePath = tmpUnzippedSong.CdgFilePath;
}
_cdgLibDllHandle = CdgLibraryWrapper.CDGPlayerOpenExt(applicationHandle,
cdgFilePath,
parentWindowHandle,
0);
_videoPlayerWindow.VideoPlayer.Source = new Uri(mp3FilePath);
_cdgWindowHeight = _videoPlayerWindow.Height;
_cdgWindowWidth = _videoPlayerWindow.Width;
CdgLibraryWrapper.CDGPlayerHeightSet(_cdgLibDllHandle, (int)_cdgWindowHeight);
CdgLibraryWrapper.CDGPlayerWidthSet(_cdgLibDllHandle, (int)_cdgWindowWidth);
}
/// <summary>
/// Starts the playback again after it has been paused
/// </summary>
public void Unpause()
{
if (IsCdgLibraryInitialized())
{
CdgLibraryWrapper.CDGPlayerPlay(_cdgLibDllHandle);
_videoPlayerWindow.VideoPlayer.Play();
}
}
/// <summary>
/// Sets the song position inside the played song
/// </summary>
/// <param name="newSongPositionInMs">new position in milliSeconds</param>
public void SetSongPosition(int newSongPositionInMs)
{
if (IsPlaying())
{
_videoPlayerWindow.VideoPlayer.Position = TimeSpan.FromMilliseconds(newSongPositionInMs);
int songPosInMs = CdgLibraryWrapper.CDGPlayerPosGet(_cdgLibDllHandle);
int deltaSecs = (newSongPositionInMs - songPosInMs) / 1000;
CdgLibraryWrapper.CDGPlayerSeek(_cdgLibDllHandle, deltaSecs);
}
}
/// <summary>
/// timer event to synchronize cdg playback position with mp3 position
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void SetCdgPositionTimer_Tick(object sender, EventArgs e)
{
try
{
if (IsCdgLibraryInitialized())
{
double audioPlayerPosition = _videoPlayerWindow.VideoPlayer.Position.TotalMilliseconds;
CdgLibraryWrapper.CDGPlayerPosSet(_cdgLibDllHandle, (int)audioPlayerPosition);
}
}
catch (Exception)
{
}
}
/// <summary>
/// Stops the playback
/// </summary>
public void Stop()
{
if (IsCdgLibraryInitialized())
{
_setCdgPositionTimer.Stop();
CdgLibraryWrapper.CDGPlayerHide(_cdgLibDllHandle);
CdgLibraryWrapper.CDGPlayerClose(_cdgLibDllHandle);
_cdgLibDllHandle = IntPtr.Zero;
_videoPlayerWindow.VideoPlayer.Stop();
if (_zipFileHelper != null)
{
_zipFileHelper.Dispose();
_zipFileHelper = null;
}
}
}
/// <summary>
/// When the cdg player window is resized and the
/// </summary>
/// <param name="sender"></param>
/// <param name="sizeChangedEventArgs"></param>
private void CDGPlayerWindowOnSizeChanged(object sender, SizeChangedEventArgs sizeChangedEventArgs)
{
_cdgWindowHeight = ((Window)sender).Height;
_cdgWindowWidth = ((Window)sender).Width;
if (IsCdgLibraryInitialized())
{
if (sizeChangedEventArgs.HeightChanged)
{
CdgLibraryWrapper.CDGPlayerHeightSet(_cdgLibDllHandle, (int)_cdgWindowHeight);
}
else
{
CdgLibraryWrapper.CDGPlayerWidthSet(_cdgLibDllHandle, (int)_cdgWindowWidth);
}
}
}
/// <summary>
/// starts the playback of the given song
/// </summary>
/// <param name="song"></param>
public void Play(PlaylistItem song)
{
if (IsCdgLibraryInitialized() == false)
{
try
{
InitializeCdgLibrary(song);
}
catch (Exception ex)
{
MessageBox.Show("The song " + song.Song.Artist + ":" + song.Song.Title + " could not be played.", "Error");
return;
}
}
_videoPlayerWindow.VideoPlayer.LoadedBehavior = MediaState.Manual;
_videoPlayerWindow.VideoPlayer.UnloadedBehavior = MediaState.Manual;
_videoPlayerWindow.VideoPlayer.Play();
CdgLibraryWrapper.CDGPlayerShow(_cdgLibDllHandle);
CdgLibraryWrapper.CDGPlayerPlay(_cdgLibDllHandle);
_setCdgPositionTimer.Start();
}
