public override bool Wrap(IBassStreamProvider provider, int channelHandle, IEnumerable <IBassStreamAdvice> advice, BassFlags flags, out IBassStream stream)
{
var offset = default(long);
var length = default(long);
if (this.Offset != TimeSpan.Zero)
{
offset = Bass.ChannelSeconds2Bytes(channelHandle, this.Offset.TotalSeconds);
}
if (this.Length != TimeSpan.Zero)
{
length = Bass.ChannelSeconds2Bytes(channelHandle, this.Length.TotalSeconds);
}
if (offset != 0 || length != 0)
{
if (length == 0)
{
length = Bass.ChannelGetLength(channelHandle, PositionFlags.Bytes) - offset;
}
stream = new BassStream(
provider,
BassSubstream.CreateStream(channelHandle, offset, length, flags),
length,
advice,
flags
);
return(true);
}
stream = null;
return(false);
}
public BassStream(IBassStreamProvider provider, int channelHandle, long length, IEnumerable <IBassStreamAdvice> advice, BassFlags flags) : this()
{
this.Provider = provider;
this.ChannelHandle = channelHandle;
this.Length = length;
this.Advice = advice;
this.Flags = flags;
}
public IEnumerable <IBassStreamAdvice> GetAdvice(IBassStreamProvider provider, PlaylistItem playlistItem)
{
var advice = new List <IBassStreamAdvice>();
foreach (var advisor in this.Advisors)
{
advisor.Advise(provider, playlistItem, advice);
}
return(advice.ToArray());
}
protected virtual bool TryGetSilence(IBassStreamProvider provider, PlaylistItem playlistItem, IEnumerable <IBassStreamAdvice> advice, out TimeSpan leadIn, out TimeSpan leadOut)
{
if (this.TryGetMetaData(this.Behaviour, playlistItem, out leadIn, out leadOut))
{
return(true);
}
if (!this.TryCalculateSilence(provider, playlistItem, advice, out leadIn, out leadOut))
{
return(false);
}
//Have to copy as cannot pass out parameter to lambda expression.
var _leadIn = leadIn;
var _leadOut = leadOut;
this.Dispatch(() => this.UpdateMetaData(playlistItem, _leadIn, _leadOut));
return(true);
}
public override void Advise(IBassStreamProvider provider, PlaylistItem playlistItem, IList <IBassStreamAdvice> advice)
{
if (this.Behaviour == null || !this.Behaviour.Enabled)
{
return;
}
var leadIn = default(TimeSpan);
var leadOut = default(TimeSpan);
try
{
if (!this.TryGetSilence(provider, playlistItem, advice, out leadIn, out leadOut))
{
return;
}
advice.Add(new BassSkipSilenceStreamAdvice(playlistItem.FileName, leadIn, leadOut));
}
catch (Exception e)
{
Logger.Write(this, LogLevel.Warn, "Failed to create stream advice for file \"{0}\": {1}", playlistItem.FileName, e.Message);
}
}
public override void Advise(IBassStreamProvider provider, PlaylistItem playlistItem, IList <IBassStreamAdvice> advice)
{
if (this.Behaviour == null || !this.Behaviour.Enabled)
{
return;
}
var fileName = default(string);
var offset = default(string);
var length = default(string);
try
{
if (!ParseUrl(playlistItem.FileName, out fileName, out offset, out length))
{
return;
}
advice.Add(new BassCueStreamAdvice(fileName, offset, length));
}
catch (Exception e)
{
Logger.Write(this, LogLevel.Warn, "Failed to create stream advice for file \"{0}\": {1}", playlistItem.FileName, e.Message);
}
}
public void Register(IBassStreamProvider provider)
{
this.Providers.Add(provider.Priority, provider);
Logger.Write(this, LogLevel.Debug, "Registered bass stream provider with priority {0}: {1}", provider.Priority, provider.GetType().Name);
}
public abstract bool Wrap(IBassStreamProvider provider, int channelHandle, IEnumerable <IBassStreamAdvice> advice, BassFlags flags, out IBassStream stream);
public BassStream(IBassStreamProvider provider, int channelHandle) : this()
{
this.Provider = provider;
this.ChannelHandle = channelHandle;
}
public abstract void Advise(IBassStreamProvider provider, PlaylistItem playlistItem, IList <IBassStreamAdvice> advice);
public void Register(IBassStreamProvider provider)
{
this.Providers.Add(provider);
Logger.Write(this, LogLevel.Debug, "Registered bass stream provider \"{0}\".", provider.GetType().Name);
}
public BassOutputStream(IBassOutput output, IBassStreamPipelineManager manager, IBassStreamProvider provider, PlaylistItem playlistItem, int channelHandle)
: base(playlistItem)
{
this.Output = output;
this.Manager = manager;
this.Provider = provider;
this.ChannelHandle = channelHandle;
if (!ActiveStreams.TryAdd(playlistItem, this))
{
//TODO: Warn.
}
}
protected virtual bool TryCalculateSilence(IBassStreamProvider provider, PlaylistItem playlistItem, IEnumerable <IBassStreamAdvice> advice, out TimeSpan leadIn, out TimeSpan leadOut)
{
if (provider.Flags.HasFlag(BassStreamProviderFlags.Serial))
{
Logger.Write(this, LogLevel.Debug, "Cannot calculate lead in/out for file \"{0}\": The provider does not support this action.", playlistItem.FileName);
leadIn = default(TimeSpan);
leadOut = default(TimeSpan);
return(false);
}
Logger.Write(this, LogLevel.Debug, "Attempting to calculate lead in/out for file \"{0}\".", playlistItem.FileName);
var stream = provider.CreateBasicStream(playlistItem, advice, BassFlags.Decode | BassFlags.Byte);
if (stream.IsEmpty)
{
Logger.Write(this, LogLevel.Warn, "Failed to create stream for file \"{0}\": {1}", playlistItem.FileName, Enum.GetName(typeof(Errors), Bass.LastError));
leadIn = default(TimeSpan);
leadOut = default(TimeSpan);
return(false);
}
try
{
var leadInBytes = this.GetLeadIn(stream, this.Behaviour.Threshold);
if (leadInBytes == -1)
{
Logger.Write(this, LogLevel.Warn, "Failed to calculate lead in for file \"{0}\": Track was considered silent.", playlistItem.FileName);
leadIn = default(TimeSpan);
leadOut = default(TimeSpan);
return(false);
}
var leadOutBytes = this.GetLeadOut(stream, this.Behaviour.Threshold);
if (leadOutBytes == -1)
{
Logger.Write(this, LogLevel.Warn, "Failed to calculate lead out for file \"{0}\": Track was considered silent.", playlistItem.FileName);
leadIn = default(TimeSpan);
leadOut = default(TimeSpan);
return(false);
}
leadIn = TimeSpan.FromSeconds(
Bass.ChannelBytes2Seconds(
stream.ChannelHandle,
leadInBytes
)
);
leadOut = TimeSpan.FromSeconds(
Bass.ChannelBytes2Seconds(
stream.ChannelHandle,
leadOutBytes
)
);
Logger.Write(this, LogLevel.Debug, "Successfully calculated lead in/out for file \"{0}\": {1}/{2}", playlistItem.FileName, leadIn, leadOut);
return(true);
}
finally
{
provider.FreeStream(playlistItem, stream.ChannelHandle);
}
}
