/// <summary>
/// Plays the specified song.
/// </summary>
private Boolean PlayInternal(Song song, Single volume, Single pitch, Single pan, TimeSpan?loopStart, TimeSpan?loopLength)
{
Ultraviolet.ValidateResource(song);
Stop();
stream = ((BASSSong)song).CreateStream(BASSNative.BASS_STREAM_DECODE);
stream = BASSFXNative.TempoCreate(stream, BASSNative.BASS_FX_FREESOURCE | BASSNative.BASS_STREAM_AUTOFREE);
if (!BASSUtil.IsValidHandle(stream))
{
throw new BASSException();
}
var autoloop = loopStart.HasValue && !loopLength.HasValue;
var syncloop = loopStart.HasValue && !autoloop;
BASSUtil.SetIsLooping(stream, autoloop);
BASSUtil.SetVolume(stream, MathUtil.Clamp(volume, 0f, 1f));
BASSUtil.SetPitch(stream, MathUtil.Clamp(pitch, -1f, 1f));
BASSUtil.SetPan(stream, MathUtil.Clamp(pan, -1f, 1f));
if (loopStart > TimeSpan.Zero && loopLength <= TimeSpan.Zero)
{
throw new ArgumentException(nameof(loopLength));
}
if (syncloop)
{
var loopStartInBytes = BASSNative.ChannelSeconds2Bytes(stream, loopStart.Value.TotalSeconds);
var loopEndInBytes = BASSNative.ChannelSeconds2Bytes(stream, (loopStart + loopLength).Value.TotalSeconds);
syncLoopDelegate = SyncLoop;
syncLoop = BASSNative.ChannelSetSync(stream, BASSSync.SYNC_POS, loopEndInBytes, syncLoopDelegate, new IntPtr((Int32)loopStartInBytes));
if (syncLoop == 0)
{
throw new BASSException();
}
}
syncEndDelegate = SyncEnd;
syncEnd = BASSNative.ChannelSetSync(stream, BASSSync.SYNC_END, 0, syncEndDelegate, IntPtr.Zero);
if (syncEnd == 0)
{
throw new BASSException();
}
if (!BASSNative.ChannelPlay(stream, true))
{
throw new BASSException();
}
OnStateChanged();
OnSongStarted();
return(true);
}
