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using System;
using System.Collections.Generic;
using PmDeviceID = System.Int32;
using PortMidiStream = System.IntPtr;
using PmError = PortMidi.MidiErrorType;
namespace PortMidi
{
public static class MidiDeviceManager
{
private const int DefaultBufferSize = 1024;
static MidiDeviceManager()
{
PortMidiMarshal.Pm_Initialize();
AppDomain.CurrentDomain.DomainUnload += delegate { PortMidiMarshal.Pm_Terminate(); };
}
public static int DeviceCount => PortMidiMarshal.Pm_CountDevices();
public static int DefaultInputDeviceId => PortMidiMarshal.Pm_GetDefaultInputDeviceID();
public static int DefaultOutputDeviceId => PortMidiMarshal.Pm_GetDefaultOutputDeviceID();
public static IEnumerable<MidiDeviceInfo> AllDevices
{
get
{
for (var i = 0; i < DeviceCount; i++)
{
yield return GetDeviceInfo(i);
}
}
}
private static MidiDeviceInfo GetDeviceInfo(PmDeviceID id)
{
return new MidiDeviceInfo(id, PortMidiMarshal.Pm_GetDeviceInfo(id));
}
public static MidiInput OpenInput(PmDeviceID inputDevice)
{
return OpenInput(inputDevice, DefaultBufferSize);
}
private static MidiInput OpenInput(PmDeviceID inputDevice, int bufferSize)
{
PortMidiStream stream = default;
var e = PortMidiMarshal.Pm_OpenInput(out stream, inputDevice, IntPtr.Zero, bufferSize, null, IntPtr.Zero);
if (e != PmError.NoError)
{
throw new MidiException(e, $"Failed to open MIDI input device {e}");
}
return new MidiInput(stream, inputDevice);
}
public static MidiOutput OpenOutput(PmDeviceID outputDevice)
{
PortMidiStream stream;
var e = PortMidiMarshal.Pm_OpenOutput(out stream, outputDevice, IntPtr.Zero, 0, null, IntPtr.Zero, 0);
if (e != PmError.NoError)
{
throw new MidiException(e, $"Failed to open MIDI output device {e}");
}
return new MidiOutput(stream, outputDevice, 0);
}
}
}
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