public bool ProcessOffline(String waveInputFilePath, String waveOutputFilePath, String pluginPath, String fxpFilePath = null, float volume = 1.0f)
{
var wavFileReader = new WaveFileReader(waveInputFilePath);
// reuse if batch processing
bool doUpdateVstPlugin = false;
if (_pluginPath != null)
{
if (_pluginPath.Equals(pluginPath))
{
// plugin has not changed
}
else
{
// plugin has changed!
doUpdateVstPlugin = true;
}
}
else
{
_pluginPath = pluginPath;
doUpdateVstPlugin = true;
}
if (doUpdateVstPlugin)
{
var hcs = new HostCommandStub();
hcs.Directory = Path.GetDirectoryName(pluginPath);
vst = new VST();
try
{
vst.PluginContext = VstPluginContext.Create(pluginPath, hcs);
if (vst.PluginContext == null)
{
Console.Out.WriteLine("Could not open up the plugin specified by {0}!", pluginPath);
return(false);
}
// plugin does not support processing audio
if ((vst.PluginContext.PluginInfo.Flags & VstPluginFlags.CanReplacing) == 0)
{
Console.Out.WriteLine("This plugin does not process any audio.");
return(false);
}
// check if the plugin supports offline proccesing
if (vst.PluginContext.PluginCommandStub.CanDo(VstCanDoHelper.ToString(VstPluginCanDo.Offline)) == VstCanDoResult.No)
{
Console.Out.WriteLine("This plugin does not support offline processing.");
Console.Out.WriteLine("Try use realtime (-play) instead!");
return(false);
}
// add custom data to the context
vst.PluginContext.Set("PluginPath", pluginPath);
vst.PluginContext.Set("HostCmdStub", hcs);
// actually open the plugin itself
vst.PluginContext.PluginCommandStub.Open();
Console.Out.WriteLine("Enabling the audio output on the VST!");
vst.PluginContext.PluginCommandStub.MainsChanged(true);
// setup the VSTStream
vstStream = new VSTStream();
vstStream.ProcessCalled += vst_ProcessCalled;
vstStream.PlayingStarted += vst_PlayingStarted;
vstStream.PlayingStopped += vst_PlayingStopped;
vstStream.pluginContext = vst.PluginContext;
vstStream.SetWaveFormat(wavFileReader.WaveFormat.SampleRate, wavFileReader.WaveFormat.Channels);
} catch (Exception ex) {
Console.Out.WriteLine("Could not load VST! ({0})", ex.Message);
return(false);
}
}
if (File.Exists(fxpFilePath))
{
vst.LoadFXP(fxpFilePath);
}
else
{
Console.Out.WriteLine("Could not find preset file (fxp|fxb) ({0})", fxpFilePath);
}
// each float is 4 bytes
var buffer = new byte[512 * 4];
using (var ms = new MemoryStream())
{
vstStream.SetInputWave(waveInputFilePath, volume);
vstStream.DoProcess = true;
// wait a little while
Thread.Sleep(1000);
// keep on reading until it stops playing.
while (!stoppedPlaying)
{
int read = vstStream.Read(buffer, 0, buffer.Length);
if (read <= 0)
{
break;
}
ms.Write(buffer, 0, read);
}
// save
using (WaveStream ws = new RawSourceWaveStream(ms, vstStream.WaveFormat))
{
ws.Position = 0;
WaveFileWriter.CreateWaveFile(waveOutputFilePath, ws);
}
}
// reset the input wave file
vstStream.DoProcess = false;
vstStream.DisposeInputWave();
// reset if calling this method multiple times
stoppedPlaying = false;
return(true);
}
