(Legacy): PAN archives and NSF audio.

Legacy/Pan/AudioNSF.cs

@@ -0,0 +1,65 @@
+//! \file       AudioNSF.cs
+//! \date       2018 Jun 05
+//! \brief      Pan engine PCM audio format.
+//
+// Copyright (C) 2018 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;
+
+namespace GameRes.Formats.Pan
+{
+    [Export(typeof(AudioFormat))]
+    public class NsfAudio : AudioFormat
+    {
+        public override string         Tag { get { return "NSF"; } }
+        public override string Description { get { return "Pan engine PCM audio"; } }
+        public override uint     Signature { get { return 0; } }
+        public override bool      CanWrite { get { return false; } }
+
+        public NsfAudio ()
+        {
+            Signatures = new uint[] { 0x010001, 0x020001, 0 };
+        }
+
+        public override SoundInput TryOpen (IBinaryStream file)
+        {
+            if (!file.Name.HasExtension ("NSF"))
+                return null;
+            var header = file.ReadHeader (0x10);
+            var format = new WaveFormat {
+                FormatTag           = header.ToUInt16 (0),
+                Channels            = header.ToUInt16 (2),
+                SamplesPerSecond    = header.ToUInt32 (4),
+                AverageBytesPerSecond = header.ToUInt16 (8),
+                BlockAlign          = header.ToUInt16 (12),
+                BitsPerSample       = header.ToUInt16 (14),
+            };
+            if (format.FormatTag != 1 ||
+                format.SamplesPerSecond * format.Channels * format.BitsPerSample / 8 != format.AverageBytesPerSecond)
+                return null;
+            var pcm = new StreamRegion (file.AsStream, 0x10);
+            return new RawPcmInput (pcm, format);
+        }
+    }
+}