/// <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);
}
public VstPluginInfo GetPluginInfo(IVstHostCommandProxy hostCmdProxy)
{
//
// get the path to the wrapped plugin from config
//
if (PluginConfiguration == null)
{
throw new InvalidOperationException("No plugin configuration found.");
}
var pluginPath = PluginConfiguration["PluginPath"];
Host.HostCommandStubAdapter hostCmdAdapter = new Host.HostCommandStubAdapter(hostCmdProxy);
_pluginCtx = VstPluginContext.Create(pluginPath, hostCmdAdapter);
return(_pluginCtx.PluginInfo);
}
/// <summary>
/// Called by the Interop loader to retrieve the plugin information.
/// </summary>
/// <param name="hostCmdStub">Must not be null.</param>
/// <returns>Returns a fully populated <see cref="VstPluginInfo"/> instance. Never returns null.</returns>
/// <remarks>Override <see cref="CreatePluginInfo"/> to change the default behavior of how the plugin info is built.</remarks>
public VstPluginInfo?GetPluginInfo(IVstHostCommandProxy hostCmdStub)
{
IVstPlugin plugin = CreatePluginInstance();
if (plugin != null)
{
if (plugin is IConfigurable config)
{
config.Configuration = this.PluginConfiguration;
}
_pluginCtx = new VstPluginContext(
plugin, new Host.VstHost(hostCmdStub, plugin), CreatePluginInfo(plugin));
Commands = CreatePluginCommands(_pluginCtx);
return(_pluginCtx.PluginInfo);
}
return(null);
}
public HostCommandStubAdapter(IVstHostCommandProxy hostCmdProxy)
{
_hostCmdProxy = hostCmdProxy;
}
public VstPluginInfo GetPluginInfo(IVstHostCommandProxy hostCmdProxy)
{
_hostAdapter = new Host.HostCommandStubAdapter(hostCmdProxy);
_commands.OnLoadPlugin = _hostAdapter.OnLoadPlugin;
return(_hostAdapter.PluginInfo);
}