// MidiProcessor's Process is called before this
// This method is used to push midi events to the host.
public override void Process(VstAudioBuffer[] inChannels, VstAudioBuffer[] outChannels)
{
timeInfo = _plugin.Host.GetInstance <IVstHostCommands20>().GetTimeInfo(
VstTimeInfoFlags.PpqPositionValid | VstTimeInfoFlags.BarStartPositionValid | VstTimeInfoFlags.TempoValid);
// MessageBox.Show("tempo:" + timeInfo.Tempo.ToString() + "\n sample rate" + timeInfo.SampleRate.ToString()
// + "\n sign. numerator: " + timeInfo.TimeSignatureNumerator.ToString());
if (_hostProcessor == null)
{
_hostProcessor = _plugin.Host.GetInstance <IVstMidiProcessor>();
}
if (_midiProcessor != null && _hostProcessor != null)
{
_midiProcessor.setTimeInfo(timeInfo);
_midiProcessor.Arpeggiate();
if (_midiProcessor.Events.Count > 0)
{
_hostProcessor.Process(_midiProcessor.Events);
_midiProcessor.Events.Clear();
}
}
// perform audio-through
base.Process(inChannels, outChannels);
}
private void EnsureHostProcessor()
{
if (_hostProcessor == null)
{
_hostProcessor = _plugin.Host.GetInstance <IVstMidiProcessor>();
}
}
/// <summary>
/// Creates a default instance and reuses that for all threads.
/// </summary>
/// <param name="instance">A reference to the default instance or null.</param>
/// <returns>Returns the default instance.</returns>
protected override IVstMidiProcessor CreateMidiProcessor(IVstMidiProcessor instance)
{
if (instance == null)
{
return(new MidiProcessor(this));
}
return(instance);
}
/// <summary>
/// Implement this when you do midi processing.
/// </summary>
/// <param name="instance">A previous instance returned by this method.
/// When non-null, return a thread-safe version (or wrapper) for the object.</param>
/// <returns>Returns null when not supported by the plugin.</returns>
protected override IVstMidiProcessor CreateMidiProcessor(IVstMidiProcessor instance)
{
if (instance == null)
{
return(new MidiProcessor(this));
}
// TODO: implement a thread-safe wrapper.
return(base.CreateMidiProcessor(instance));
}
private IVstMidiProcessor CreateMidiProcessor(IVstMidiProcessor instance)
{
if (instance == null &&
_host.HostCommandStub.CanDo(VstCanDoHelper.ToString(VstHostCanDo.ReceiveVstMidiEvent)) != VstCanDoResult.No)
{
return(new VstHostMidiProcessor(_host));
}
return(instance);
}
/// <summary>
/// Implement this when you do midi processing.
/// </summary>
/// <param name="instance">A previous instance returned by this method.
/// When non-null, return a thread-safe version (or wrapper) for the object.</param>
/// <returns>Returns null when not supported by the plugin.</returns>
protected override IVstMidiProcessor CreateMidiProcessor(IVstMidiProcessor instance)
{
if (instance == null)
{
MidiHandler newMidiHandler = new MidiHandler();
newMidiHandler.Init(() => this.MssHub.DryMssEventInputPort,
() => this.MssHub.WetMssEventOutputPort,
() => this.MssHub.HostInfoOutputPort);
return(newMidiHandler);
}
return(base.CreateMidiProcessor(instance));
}
/// <summary>
/// Constructs a new instance of the host class based on the <paramref name="hostCmdProxy"/>
/// (from Interop) and a reference to the current <paramref name="plugin"/>.
/// </summary>
/// <param name="hostCmdProxy">Must not be null.</param>
/// <param name="plugin">Must not be null.</param>
/// <exception cref="ArgumentNullException">Thrown when <paramref name="hostCmdProxy"/> or
/// <paramref name="plugin"/> is not set to an instance of an object.</exception>
public VstHost(IVstHostCommandProxy hostCmdProxy, IVstPlugin plugin)
{
Throw.IfArgumentIsNull(hostCmdProxy, nameof(hostCmdProxy));
Throw.IfArgumentIsNull(plugin, nameof(plugin));
HostCommandProxy = hostCmdProxy;
Plugin = plugin;
_automation = new VstHostAutomation(this);
_sequencer = new VstHostSequencer(this);
_shell = new VstHostShell(this);
_midiProcessor = new VstHostMidiProcessor(this);
}
/// <summary>
/// Creates a default instance and reuses that for all threads.
/// </summary>
/// <param name="instance">A reference to the default instance or null.</param>
/// <returns>Returns the default instance.</returns>
protected override IVstMidiProcessor CreateMidiProcessor(IVstMidiProcessor instance)
{
if (instance == null)
{
MidiProcessor = new MidiProcessor(this);
if (AudioProcessor != null)
{
AudioProcessor.SetUp();
}
return(MidiProcessor);
}
return(base.CreateMidiProcessor(instance));
}
/// <inheritdoc />
/// <remarks>This method is used to push midi events to the host.</remarks>
public override void Process(VstAudioBuffer[] inChannels, VstAudioBuffer[] outChannels)
{
if (_hostProcessor == null)
{
_hostProcessor = _plugin.Host.GetInstance <IVstMidiProcessor>();
}
if (_midiProcessor != null && _hostProcessor != null &&
_midiProcessor.Events.Count > 0)
{
_hostProcessor.Process(_midiProcessor.Events);
_midiProcessor.Events.Clear();
}
// perform audio-through
base.Process(inChannels, outChannels);
}
/// <inheritdoc />
/// <remarks>This method is used to push midi inputEvents to the host.</remarks>
public override void Process(VstAudioBuffer[] inChannels, VstAudioBuffer[] outChannels)
{
if (_hostProcessor == null)
{
_hostProcessor = _plugin.Host.GetInstance<IVstMidiProcessor>();
}
if (_midiProcessor != null && _hostProcessor != null &&
_midiProcessor.Events.Count > 0)
{
_hostProcessor.Process(_midiProcessor.Events);
_midiProcessor.Events.Clear();
}
// perform audio-through
base.Process(inChannels, outChannels);
}
public void ProcessCurrentEvents()
{
if (CurrentEvents == null || CurrentEvents.Count == 0)
{
return;
}
// a plugin must implement IVstPluginMidiSource or this call will throw an exception.
IVstMidiProcessor midiHost = _plugin.Host.GetInstance <IVstMidiProcessor>();
// always expect some hosts not to support this.
if (midiHost != null)
{
VstEventCollection outEvents = new VstEventCollection();
// NOTE: other types of events could be in the collection!
foreach (VstEvent evnt in CurrentEvents)
{
switch (evnt.EventType)
{
case VstEventTypes.MidiEvent:
VstMidiEvent midiEvent = (VstMidiEvent)evnt;
midiEvent = Gain.ProcessEvent(midiEvent);
midiEvent = Transpose.ProcessEvent(midiEvent);
outEvents.Add(midiEvent);
break;
default:
// non VstMidiEvent
outEvents.Add(evnt);
break;
}
}
midiHost.Process(outEvents);
}
// Clear the cache, we've processed the events.
CurrentEvents = null;
}
/// <summary>
/// Receives processed MssEvents from the IWetMssEventOutputPort.
/// </summary>
/// <param name="mssEvents">List of processed mss events</param>
/// <param name="sampleTimeAtEndOfProcessingCycle">
/// If wetMssEventOutputPort is configured to only output when a processing cycle ends then
/// sampleTimeAtEndOfProcessingCycle will contain the end time the cycle that just ended.
/// </param>
public void IWetMssEventOutputPort_SendingWetMssEvents(List <MssEvent> mssEvents,
long sampleTimeAtEndOfProcessingCycle)
{
if (this.vstHost == null)
{
return;
}
// a plugin must implement IVstPluginMidiSource or this call will throw an exception.
IVstMidiProcessor midiHost = this.vstHost.GetInstance <IVstMidiProcessor>();
// always expect some hosts not to support this.
if (midiHost != null)
{
//Attempts to convert each MssEvent to a VstMidiEvent and add it to outEvents
foreach (MssEvent mssEvent in mssEvents)
{
//This will return null if there is no valid conversion.
VstMidiEvent midiEvent =
ConvertMssEventToVstMidiEvent(mssEvent,
this.SampleTimeAtStartOfProcessingCycle,
this.hostInfoOutputPort.SampleRate);
if (midiEvent != null)
{
this.outEvents.Add(midiEvent);
//midiHost.Process(outEvents);
//outEvents.Clear();
}
}
//TODO: Figure out why it doesn't work to send all of the events at once.
//Sends VstMidiEvents to host
midiHost.Process(outEvents);
outEvents.Clear();
}
OnProcessingCycleEnd(sampleTimeAtEndOfProcessingCycle);
}
/// <summary>
/// Implement this when you do midi processing.
/// </summary>
/// <param name="instance">A previous instance returned by this method.
/// When non-null, return a thread-safe version (or wrapper) for the object.</param>
/// <returns>Returns null when not supported by the plugin.</returns>
protected override IVstMidiProcessor CreateMidiProcessor(IVstMidiProcessor instance)
{
if (instance == null)
{
MidiHandler newMidiHandler = new MidiHandler();
newMidiHandler.Init(() => this.MssHub.DryMssEventInputPort,
() => this.MssHub.WetMssEventOutputPort,
() => this.MssHub.HostInfoOutputPort);
return newMidiHandler;
}
return base.CreateMidiProcessor(instance);
}
protected override IVstMidiProcessor CreateMidiProcessor(IVstMidiProcessor instance)
{
return(MidiListener);
}
/// <summary>
/// Creates a default instance and reuses that for all threads.
/// </summary>
/// <param name="instance">A reference to the default instance or null.</param>
/// <returns>Returns the default instance.</returns>
protected override IVstMidiProcessor CreateMidiProcessor(IVstMidiProcessor instance)
{
if (instance == null) return new MidiProcessor(this);
return instance;
}
///// <summary>
///// Called when an instance of the <see cref="IVstPluginHost"/> interface is requested.
///// </summary>
///// <param name="instance">The default instance or null.</param>
///// <returns>Returns <paramref name="instance"/>.</returns>
///// <remarks>Override to create an instance of the <see cref="IVstPluginHost"/> interface.
///// When <paramref name="instance"/> is null, create the default instance. When the <paramref name="instance"/>
///// is not null, create a Thread Safe instance, possibly wrapping the default <paramref name="instance"/>.</remarks>
//protected virtual IVstPluginHost CreateHost(IVstPluginHost instance)
//{
// return instance;
//}
/// <summary>
/// Called when an instance of the <see cref="IVstMidiProcessor"/> interface is requested.
/// </summary>
/// <param name="instance">The default instance or null.</param>
/// <returns>Returns <paramref name="instance"/>.</returns>
/// <remarks>Override to create an instance of the <see cref="IVstMidiProcessor"/> interface.
/// When <paramref name="instance"/> is null, create the default instance. When the <paramref name="instance"/>
/// is not null, create a Thread Safe instance, possibly wrapping the default <paramref name="instance"/>.</remarks>
protected virtual IVstMidiProcessor CreateMidiProcessor(IVstMidiProcessor instance)
{
return(instance);
}
public void ProcessCurrentEvents()
{
if (CurrentEvents == null || CurrentEvents.Count == 0)
{
return;
}
// a plugin must implement IVstPluginMidiSource or this call will throw an exception.
IVstMidiProcessor midiHost = _plugin.Host.GetInstance <IVstMidiProcessor>();
// always expect some hosts not to support this.
if (midiHost != null)
{
VstEventCollection outEvents = new VstEventCollection();
// NOTE: other types of events could be in the collection!
foreach (VstEvent evnt in CurrentEvents)
{
switch (evnt.EventType)
{
case VstEventTypes.MidiEvent:
VstMidiEvent midiEvent = (VstMidiEvent)evnt;
//General midi effects for all inputs
midiEvent = Gain.ProcessEvent(midiEvent);
midiEvent = Transpose.ProcessEvent(midiEvent);
//Process Midi Note in SampleManager
if ((midiEvent.Data[0] & 0xF0) == 0x80)
{
_plugin.SampleManager.ProcessNoteOffEvent(midiEvent.Data[1]);
}
if ((midiEvent.Data[0] & 0xF0) == 0x90)
{
// note on with velocity = 0 is a note off
if (MidiHelper.IsNoteOff(midiEvent.Data))
{
_plugin.SampleManager.ProcessNoteOffEvent(midiEvent.Data[1]);
}
else
{
_plugin.SampleManager.ProcessNoteOnEvent(midiEvent.Data[1]);
}
}
outEvents.Add(midiEvent);
break;
default:
// non VstMidiEvent
outEvents.Add(evnt);
break;
}
}
midiHost.Process(outEvents);
}
// Clear the cache, we've processed the events.
CurrentEvents = null;
}
/// <summary>
/// Implement this when you do midi processing.
/// </summary>
/// <param name="instance">A previous instance returned by this method.
/// When non-null, return a thread-safe version (or wrapper) for the object.</param>
/// <returns>Returns null when not supported by the plugin.</returns>
protected override IVstMidiProcessor CreateMidiProcessor(IVstMidiProcessor instance)
{
if (instance == null)
{
return new MidiProcessor(this);
}
// TODO: implement a thread-safe wrapper.
return base.CreateMidiProcessor(instance);
}
