/// <summary>
/// Starts a loop. The playback must be activated.
/// </summary>
/// <param name="loop">Loop to apply</param>
public void StartLoop(Loop loop)
{
if (Playlist == null || Playlist.CurrentItem == null || Playlist.CurrentItem.Channel == null)
return;
if (loop.Segments.Count == 0)
return;
long positionBytes = loop.Segments[_currentSegmentIndex].PositionBytes;
long nextPositionBytes = 0;
var segment = loop.GetNextSegmentForPlayback(_currentSegmentIndex);
if (segment != null)
nextPositionBytes = segment.PositionBytes;
if (Playlist.CurrentItem.AudioFile.FileType == AudioFileFormat.FLAC && Playlist.CurrentItem.AudioFile.SampleRate > 44100)
{
// Divide by 1.5 (I don't really know why, but this works for 48000Hz and 96000Hz. Maybe a bug in BASS with FLAC files?)
positionBytes = (long)((float)positionBytes / 1.5f);
}
#if !IOS && !ANDROID
if (_device.DriverType == DriverType.WASAPI)
{
BassWasapi.BASS_WASAPI_Stop(true);
BassWasapi.BASS_WASAPI_Start();
}
#endif
// Remove any sync callback
RemoveSyncCallbacks();
// Get file length
long length = Playlist.CurrentItem.Channel.GetLength();
_mixerChannel.Lock(true);
// Set position for the decode channel (needs to be in floating point)
Playlist.CurrentItem.Channel.SetPosition(positionBytes * 2);
_fxChannel.SetPosition(0); // Clear buffer
_mixerChannel.SetPosition(0);
// Set sync
_syncProcLoop = new PlayerSyncProc();
#if IOS
_syncProcLoop.SyncProc = new SYNCPROC(LoopSyncProcIOS);
#else
_syncProcLoop.SyncProc = new SYNCPROC(LoopSyncProc);
#endif
if (_mixerChannel is MixerChannel)
{
var mixerChannel = _mixerChannel as MixerChannel;
_syncProcLoop.Handle = mixerChannel.SetSync(_fxChannel.Handle, BASSSync.BASS_SYNC_POS | BASSSync.BASS_SYNC_MIXTIME, (nextPositionBytes - positionBytes) * 2, _syncProcLoop.SyncProc);
}
else
{
_syncProcLoop.Handle = _mixerChannel.SetSync(BASSSync.BASS_SYNC_POS | BASSSync.BASS_SYNC_MIXTIME, (nextPositionBytes - positionBytes) * 2, _syncProcLoop.SyncProc);
}
// Set new callback (length already in floating point)
SetSyncCallback((length - (nextPositionBytes * 2))); // + buffered));
// Set offset position (for calulating current position)
_positionOffset = positionBytes;
_mixerChannel.Lock(false);
_currentLoop = loop;
}