added WmaFormat implementation.

not included into project since it requires updated NAudio version which
is not available via nuget.

ArcFormats/AudioWMA.cs

@@ -0,0 +1,103 @@
+//! \file       AudioWMA.cs
+//! \date       Sun Oct 23 21:29:19 2016
+//! \brief      Windows Media Audio format.
+//
+// Copyright (C) 2016 by morkt
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to
+// deal in the Software without restriction, including without limitation the
+// rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+// sell copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+// IN THE SOFTWARE.
+//
+
+using System;
+using System.ComponentModel.Composition;
+using System.IO;
+using NAudio.Wave;
+
+namespace GameRes.Formats
+{
+    [Export(typeof(AudioFormat))]
+    public class WmaAudio : AudioFormat
+    {
+        public override string         Tag { get { return "WMA"; } }
+        public override string Description { get { return "Windows Media Audio format"; } }
+        public override uint     Signature { get { return 0x75B22630; } }
+        public override bool      CanWrite { get { return false; } }
+
+        public override SoundInput TryOpen (IBinaryStream file)
+        {
+            return new WmaInput (file.AsStream);
+        }
+    }
+
+    public class WmaInput : SoundInput
+    {
+        int                     m_bitrate;
+        MediaFoundationReader   m_reader;
+
+        public override long Position
+        {
+            get { return m_reader.Position; }
+            set { m_reader.Position = value; }
+        }
+
+        public override bool CanSeek { get { return true; } }
+
+        public override int SourceBitrate
+        {
+            get { return m_bitrate; }
+        }
+
+        public override string SourceFormat { get { return "wma"; } }
+
+        public WmaInput (Stream file) : base (file)
+        {
+            m_reader = new StreamMediaFoundationReader (file);
+            m_bitrate = m_reader.WaveFormat.AverageBytesPerSecond * 8;
+            var format = new GameRes.WaveFormat();
+            format.FormatTag                = (ushort)m_reader.WaveFormat.Encoding;
+            format.Channels                 = (ushort)m_reader.WaveFormat.Channels;
+            format.SamplesPerSecond         = (uint)m_reader.WaveFormat.SampleRate;
+            format.BitsPerSample            = (ushort)m_reader.WaveFormat.BitsPerSample;
+            format.BlockAlign               = (ushort)m_reader.BlockAlign;
+            format.AverageBytesPerSecond    = (uint)m_reader.WaveFormat.AverageBytesPerSecond;
+            this.Format = format;
+            this.PcmSize = m_reader.Length;
+        }
+
+        public override int Read (byte[] buffer, int offset, int count)
+        {
+            return m_reader.Read (buffer, offset, count);
+        }
+
+        #region IDisposable Members
+        bool _wma_disposed;
+        protected override void Dispose (bool disposing)
+        {
+            if (!_wma_disposed)
+            {
+                if (disposing)
+                {
+                    m_reader.Dispose();
+                }
+                _wma_disposed = true;
+                base.Dispose (disposing);
+            }
+        }
+        #endregion
+    }
+}