/// <summary>Loads the specified <see cref="MDBPlayListItem"/>.</summary>
/// <param name="mdb">The <see cref="MusicDataBase"/> instance.</param>
/// <param name="item">The <see cref="MDBPlayListItem"/>.</param>
/// <returns></returns>
public static MDBFileSelection Load(MusicDataBase mdb, MDBPlayListItem item)
{
var result = new MDBFileSelection();
result.AudioFile = mdb.AudioFiles.TryGetStruct(item.AudioFileID);
result.File = mdb.Files.TryGetStruct(result.AudioFile.FileID);
result.NowPlaying = MDBNowPlaying.Create(mdb, item.StreamID, item.OwnerID, item.SubsetID, DateTime.MinValue, result.AudioFile);
result.PlayListItem = item;
return(result);
}
private void PlayFile(MDBFileSelection selection)
{
var silenceCompression = mdb.Config.ReadBool("Player", "SilenceCompression", false);
IAudioDecoder decoder = new Mpg123(false);
if (!decoder.IsAvailable)
{
decoder = new MP3AudioDecoder();
}
this.LogInfo("Prepare playing {0} using audio decoder <cyan>{1}<default> silence compression {2}", selection.AudioFile, decoder, silenceCompression);
string fileName = selection.File.GetFullPath(mdb);
this.LogDebug("Open file {0}", fileName);
var mp3FileStream = ResistantFileStream.OpenSequentialRead(fileName);
decoder.BeginDecode(mp3FileStream);
currentNowPlaying = MDBNowPlaying.Create(mdb, selection.PlayListItem.StreamID, selection.PlayListItem.OwnerID, selection.PlayListItem.SubsetID, DateTime.MinValue, selection.AudioFile);
IAudioData audioData = decoder.Decode();
if (device == null)
{
device = SelectDevice() ?? throw new Exception("Could not find any available audio device implementation!");
}
var audioOut = device.CreateAudioOut(audioData);
this.LogInfo("Start buffering {0} <cyan>{1}", selection.AudioFile, audioData);
TimeSpan inSilenceTime = TimeSpan.Zero;
TimeSpan fileReadPosition = TimeSpan.Zero;
skip = false;
bool started = false;
long underflow = 0;
while (!exit && !skip)
{
//buffer until we got at least one second, or ten during playback
var sleepTime = started ? audioOut.TimeBuffered - TenSeconds : audioOut.TimeBuffered - OneSecond;
//buffer filled ?
if (sleepTime > TimeSpan.Zero)
{
if (CurrentStreamSettings.StreamType != MDBStreamType.JukeBob)
{
skip = true;
}
if (audioOut.Volume != Math.Max(0, CurrentStreamSettings.Volume))
{
audioOut.Volume = CurrentStreamSettings.Volume;
}
//already started ?
if (started)
{
//yes, check for a gap/buffer underrun ?
if (audioOut.BufferUnderflowCount != underflow)
{
//we got a gap, fix starttime
underflow = audioOut.BufferUnderflowCount;
this.LogWarning("Player GAP {0}, Buffer was empty!", underflow);
currentNowPlaying.StartDateTime = DateTime.UtcNow - fileReadPosition + audioOut.TimeBuffered;
ThreadPool.QueueUserWorkItem(delegate { mdb.NowPlaying.Replace(currentNowPlaying); });
}
else
{
Thread.Sleep(Math.Min(1000, (int)sleepTime.TotalMilliseconds));
}
}
else
{
//do start if we are allowed to (check playing previous title)
sleepTime = nextStart - DateTime.UtcNow;
if (sleepTime > TimeSpan.Zero)
{
this.LogVerbose("Sleep {0}", sleepTime.FormatTime());
Thread.Sleep(sleepTime);
}
currentNowPlaying.StartDateTime = DateTime.UtcNow;
audioOut.Start();
started = true;
this.LogInfo("Start playing {0}", selection.AudioFile);
//write to now playing
ThreadPool.QueueUserWorkItem(delegate
{
mdb.NowPlaying.Replace(currentNowPlaying);
mdb.PlayListItems.TryDelete(nameof(MDBPlayListItem.ID), selection.PlayListItem.ID);
});
}
}
audioData = decoder.Decode();
//end of file ?
if (audioData == null)
{
break;
}
//add packet duration to file position
fileReadPosition += audioData.Duration;
//skip silence
if (silenceCompression)
{
if (audioData.Peak < 0.001f)
{
if (inSilenceTime > OneSecond)
{
continue;
}
inSilenceTime += audioData.Duration;
}
else
{
if (inSilenceTime > OneSecond)
{
//we skipped some silence, fix starttime
this.LogDebug("Silence compression {0}", inSilenceTime.FormatTime());
currentNowPlaying.StartDateTime = DateTime.UtcNow - fileReadPosition + audioOut.TimeBuffered;
ThreadPool.QueueUserWorkItem(delegate { mdb.NowPlaying.Replace(currentNowPlaying); });
}
inSilenceTime = TimeSpan.Zero;
}
}
if (!audioOut.Configuration.Equals(audioData))
{
this.LogWarning("Frankenstein Stream in file <red>{0}", fileName);
break;
}
audioOut.Write(audioData);
}
nextStart = DateTime.UtcNow;
if (skip)
{
//skipped, start in 2s
nextStart += TimeSpan.FromSeconds(1);
}
else
{
//start after current title
nextStart += audioOut.TimeBuffered - TimeSpan.FromSeconds(1);
}
this.LogInfo("Finish playing {0}", selection.AudioFile);
if (exit)
{
CloseAudioOut(audioOut);
}
else
{
CloseAudioOutAsync(audioOut);
}
}