implemented AnimeGameSystem audio format.

ArcFormats/AnimeGameSystem/AudioPCM.cs

@@ -0,0 +1,120 @@
+//! \file       AudioPCM.cs
+//! \date       Thu Nov 05 05:33:48 2015
+//! \brief      AnimeGameSystem raw PCM audio.
+//
+// Copyright (C) 2015 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.Ags
+{
+    [Export(typeof(AudioFormat))]
+    public class PcmAudio : WaveAudio
+    {
+        public override string         Tag { get { return "PCM/AGS"; } }
+        public override string Description { get { return "AnimeGameSystem PCM audio"; } }
+        public override uint     Signature { get { return 0; } }
+
+        public PcmAudio ()
+        {
+            Extensions = new string[] { "pcm" };
+        }
+
+        public override SoundInput TryOpen (Stream file)
+        {
+            uint signature = FormatCatalog.ReadSignature (file) & 0xFFFFFF;
+            if (0x564157 != signature) // 'WAV'
+                return null;
+            return new PcmInput (file);
+        }
+    }
+
+    public class PcmInput : SoundInput
+    {
+        public override string SourceFormat { get { return "raw"; } }
+
+        public override int SourceBitrate
+        {
+            get { return (int)Format.AverageBytesPerSecond * 8; }
+        }
+
+        public PcmInput (Stream file) : base (null)
+        {
+            file.Position = 3;
+            int type = file.ReadByte();
+            int data_length = (int)file.Length - 4;
+            var format = new WaveFormat();
+            format.FormatTag                = 1;
+            format.Channels                 = (ushort)((type & 1) + 1);
+            type &= ~1;
+            if (0xA == type)
+            {
+                format.SamplesPerSecond     = 44100;
+                format.BitsPerSample        = 16;
+            }
+            else if (6 == type)
+            {
+                format.SamplesPerSecond     = 22050;
+                format.BitsPerSample        = 16;
+            }
+            else if (4 == type)
+            {
+                format.SamplesPerSecond     = 22050;
+                format.BitsPerSample        = 8;
+            }
+            else
+                throw new NotSupportedException ("Not supported PCM format");
+            format.BlockAlign               = (ushort)(format.Channels*format.BitsPerSample/8);
+            format.AverageBytesPerSecond    = format.SamplesPerSecond*format.BlockAlign;
+            this.Format = format;
+            this.PcmSize = data_length;
+            this.Source = new StreamRegion (file, 4, data_length);
+        }
+
+        #region IO.Stream methods
+        public override long Position
+        {
+            get { return Source.Position; }
+            set { Source.Position = value; }
+        }
+
+        public override bool CanSeek { get { return Source.CanSeek; } }
+
+        public override long Seek (long offset, SeekOrigin origin)
+        {
+            return Source.Seek (offset, origin);
+        }
+
+        public override int Read (byte[] buffer, int offset, int count)
+        {
+            return Source.Read (buffer, offset, count);
+        }
+
+        public override int ReadByte ()
+        {
+            return Source.ReadByte();
+        }
+        #endregion
+    }
+}