static void StartVstHost(string pluginPath, string waveInputFilePath, string fxpFilePath, string waveOutputFilePath, bool doPlay) {
VstHost host = VstHost.Instance;
var hcs = new HostCommandStub();
host.OpenPlugin(pluginPath, hcs);
host.InputWave = waveInputFilePath;
// with iblock=1...Nblocks and blocksize = Fs * tblock. Fs = 44100 and
// tblock = 0.15 makes blocksize = 6615.
const int sampleRate = 44100;
const int blockSize = 8192;
const int channels = 2;
host.Init(blockSize, sampleRate, channels);
System.Diagnostics.Debug.WriteLine(host.getPluginInfo());
host.LoadFXP(fxpFilePath);
if (doPlay) {
var playback = new VstPlaybackNAudio(host);
playback.Play();
Console.WriteLine("Started Audio Playback");
// make sure to play while the stream is playing
if (playback.PlaybackDevice.PlaybackState == PlaybackState.Playing)
{
Thread.Sleep(5000);
}
Console.WriteLine("Ending Audio Playback");
playback.Stop();
Console.WriteLine("Stopped Audio Playback");
playback.Dispose();
}
if (waveOutputFilePath != "") {
var fileWriter = new VstFileWriter(host);
fileWriter.CreateWaveFile(waveOutputFilePath);
}
}
void MidiNoteCheckboxCheckedChanged(object sender, EventArgs e)
{
VstHost host = VstHost.Instance;
host.PluginContext = this.PluginContext;
host.doPluginOpen();
// if first keypress setup audio
if (playback == null) {
// with iblock=1...Nblocks and blocksize = Fs * tblock. Fs = 44100 and
// tblock = 0.15 makes blocksize = 6615.
int sampleRate = 44100;
int blockSize = (int) (sampleRate * 0.15f); //6615;
int channels = 2;
host.Init(blockSize, sampleRate, channels);
playback = new VstPlaybackNAudio(host);
playback.Play();
}
CheckBox check = (CheckBox) sender;
if(check.Checked)
{
host.SendMidiNote(host.SendContinousMidiNote, host.SendContinousMidiNoteVelocity);
} else {
host.SendMidiNote(host.SendContinousMidiNote, 0);
}
}
void EditorFrameKeyDown(object sender, KeyEventArgs e)
{
if ((PluginContext.PluginInfo.Flags & VstPluginFlags.CanReplacing) == 0)
{
return;
}
if (hasNoKeyDown) {
try
{
byte midiVelocity = 100;
byte midiNote = KeyEventArgToMidiNote(e);
System.Diagnostics.Debug.WriteLine("Key Down Event Detected: {0}, {1}, {2}", e.KeyCode, midiNote, midiVelocity);
// only bother with the keys that trigger midi notes
if (midiNote != 0) {
VstHost host = VstHost.Instance;
host.PluginContext = this.PluginContext;
// if first keypress setup audio
if (playback == null) {
// with iblock=1...Nblocks and blocksize = Fs * tblock. Fs = 44100 and
// tblock = 0.15 makes blocksize = 6615.
int sampleRate = 44100;
int blockSize = (int) (sampleRate * 0.15f); //6615;
int channels = 2;
host.Init(blockSize, sampleRate, channels);
playback = new VstPlaybackNAudio(host);
playback.Play();
}
host.SendMidiNote(midiNote, midiVelocity);
hasNoKeyDown = false; // Set to False to disable keyboard Auto Repeat
}
} catch (Exception ex) {
System.Diagnostics.Debug.WriteLine(ex.StackTrace);
MessageBox.Show(ex.Message);
}
} else {
hasNoKeyDown = false; // Set to False to disable keyboard Auto Repeat
}
}
void AnalyseBtnClick(object sender, EventArgs e)
{
VstHost host = VstHost.Instance;
host.PluginContext = this.PluginContext;
host.doPluginOpen();
// if first keypress setup audio
if (playback == null) {
// with iblock=1...Nblocks and blocksize = Fs * tblock. Fs = 44100 and
// tblock = 0.15 makes blocksize = 6615.
int sampleRate = 44100;
int blockSize = (int) (sampleRate * 0.15f); //6615;
int channels = 2;
host.Init(blockSize, sampleRate, channels);
playback = new VstPlaybackNAudio(host);
playback.Play();
}
AnalyseForm dlg = new AnalyseForm();
dlg.PluginContext = this.PluginContext;
dlg.Playback = playback;
//dlg.ShowDialog(this); // modal
dlg.Show(); // modeless
}
void ProcessAudioBtnClick(object sender, EventArgs e)
{
// plugin does not support processing audio
if ((PluginContext.PluginInfo.Flags & VstPluginFlags.CanReplacing) == 0)
{
MessageBox.Show(this, "This plugin does not process any audio.", this.Text, MessageBoxButtons.OK, MessageBoxIcon.Exclamation);
return;
}
VstHost host = VstHost.Instance;
host.PluginContext = this.PluginContext;
if (waveInputFilePath != "") {
host.InputWave = waveInputFilePath;
// with iblock=1...Nblocks and blocksize = Fs * tblock. Fs = 44100 and
// tblock = 0.15 makes blocksize = 6615.
int sampleRate = 44100;
int blockSize = (int) (sampleRate * 0.15f); //6615;
int channels = 2;
host.Init(blockSize, sampleRate, channels);
if (playback == null) {
playback = new VstPlaybackNAudio(host);
playback.Play();
} else {
// toogle start or stop
if (playback.PlaybackDevice.PlaybackState == PlaybackState.Playing) {
playback.Stop();
} else if (playback.PlaybackDevice.PlaybackState == PlaybackState.Stopped) {
playback.Play();
}
}
} else {
MessageBox.Show(this, "Please choose an audio file to process.", this.Text, MessageBoxButtons.OK, MessageBoxIcon.Exclamation);
}
}
void PlayMidiC5100msBtnClick(object sender, EventArgs e)
{
VstHost host = VstHost.Instance;
host.PluginContext = this.PluginContext;
host.doPluginOpen();
// if first keypress setup audio
if (Playback == null) {
// with iblock=1...Nblocks and blocksize = Fs * tblock. Fs = 44100 and
// tblock = 0.15 makes blocksize = 6615.
int sampleRate = 44100;
int blockSize = (int) (sampleRate * 0.15f); //6615;
int channels = 2;
host.Init(blockSize, sampleRate, channels);
Playback = new VstPlaybackNAudio(host);
Playback.Play();
}
// time how long this took
Stopwatch stopwatch = Stopwatch.StartNew();
// end midi note on
host.SendMidiNote(host.SendContinousMidiNote, host.SendContinousMidiNoteVelocity);
// wait 100 ms
System.Threading.Thread.Sleep(100);
// send midi note off
host.SendMidiNote(host.SendContinousMidiNote, 0);
stopwatch.Stop();
Console.WriteLine("Midi Note Sent. Time used {0} ms", stopwatch.ElapsedMilliseconds);
}