+ Added interfaces for Audio Devices and Enumeration for them.

MonoAudio.Core/IO/DataFlow.cs

@@ -0,0 +1,28 @@
+using System;
+using System.Collections.Generic;
+using System.Text;
+
+namespace MonoAudio.IO
+{
+    /// <summary>
+    /// Represents a flow kind of audio data.
+    /// </summary>
+    [Flags]
+    public enum DataFlow
+    {
+        /// <summary>
+        /// Invalid.
+        /// </summary>
+        None = 0,
+
+        /// <summary>
+        /// Output.
+        /// </summary>
+        Render = 1,
+
+        /// <summary>
+        /// Input.
+        /// </summary>
+        Capture = 2,
+    }
+}

MonoAudio.Core/IO/IAudioDeviceEnumerator.cs

@@ -0,0 +1,19 @@
+using System;
+using System.Collections.Generic;
+using System.Text;
+
+namespace MonoAudio.IO
+{
+    /// <summary>
+    /// Defines a base infrastructure of an audio device enumerator.
+    /// </summary>
+    public interface IAudioDeviceEnumerator
+    {
+        /// <summary>
+        /// Enumerates devices of specified <paramref name="dataFlow"/>.
+        /// </summary>
+        /// <param name="dataFlow">The <see cref="DataFlow"/> kind to enumerate devices of.</param>
+        /// <returns>The <see cref="IEnumerable{T}"/> of audio devices.</returns>
+        IEnumerable<IAudioDevice> EnumerateDevices(DataFlow dataFlow);
+    }
+}

MonoAudio.Core/IO/IAudioInputDevice.cs

@@ -0,0 +1,19 @@
+using System;
+using System.Collections.Generic;
+using System.Text;
+
+namespace MonoAudio.IO
+{
+    /// <summary>
+    /// Defines a base structure of audio input device.
+    /// </summary>
+    public interface IAudioInputDevice : IAudioDevice
+    {
+        /// <summary>
+        /// Indicates whether the audio input device supports a particular stream format.
+        /// </summary>
+        /// <param name="format">The format to judge the availability.</param>
+        /// <returns><c>true</c> if succeeded and the audio device supports the specified stream format.</returns>
+        bool IsFormatSupported(WaveFormat format);
+    }
+}

MonoAudio.Core/IO/IAudioOutputDevice.cs

@@ -0,0 +1,19 @@
+using System;
+using System.Collections.Generic;
+using System.Text;
+
+namespace MonoAudio.IO
+{
+    /// <summary>
+    /// Defines a base structure of audio output device.
+    /// </summary>
+    public interface IAudioOutputDevice : IAudioDevice
+    {
+        /// <summary>
+        /// Indicates whether the audio output device supports a particular stream format.
+        /// </summary>
+        /// <param name="format">The format to judge the availability.</param>
+        /// <returns><c>true</c> if succeeded and the audio device supports the specified stream format.</returns>
+        bool IsFormatSupported(WaveFormat format);
+    }
+}