(VafsOpener): implemented audio entries decoding.

ArcFormats/ArcFormats.csproj

@@ -418,6 +418,8 @@
     <Compile Include="YuRis\WidgetYPF.xaml.cs">
       <DependentUpon>WidgetYPF.xaml</DependentUpon>
     </Compile>
+    <EmbeddedResource Include="Softpal\WaveTable1" />
+    <EmbeddedResource Include="Softpal\WaveTable2" />
   </ItemGroup>
   <ItemGroup>
     <ProjectReference Include="..\GameRes\GameRes.csproj">

ArcFormats/Softpal/ArcVAFS.cs

@@ -27,6 +27,8 @@ using System;
 using System.Collections.Generic;
 using System.ComponentModel.Composition;
 using System.IO;
+using System.Text;
+using GameRes.Utility;
 
 namespace GameRes.Formats.Softpal
 {
@@ -52,6 +54,9 @@ namespace GameRes.Formats.Softpal
                 return null;
             uint index_offset = 0x10;
             uint data_offset = file.View.ReadUInt32 (index_offset);
+            var base_name = Path.GetFileNameWithoutExtension (file.Name).ToUpperInvariant();
+            if (0 == data_offset && "TP" == base_name)
+                return OpenTpArc (file);
             if (data_offset < index_offset || data_offset >= file.MaxOffset)
                 return null;
             int count = (int)(data_offset - index_offset) / 4;
@@ -59,9 +64,8 @@ namespace GameRes.Formats.Softpal
                 return null;
 
             uint next_offset = data_offset;
-            var base_name = Path.GetFileNameWithoutExtension (file.Name).ToUpperInvariant();
-            bool is_audio = "BGM" == base_name;
-            bool is_pic   = "PIC" == base_name;
+            bool is_bgm = "BGM" == base_name;
+            bool is_pic = "PIC" == base_name;
             var dir = new List<Entry> (count);
             for (int i = 0; next_offset != file.MaxOffset && i < count; ++i)
             {
@@ -69,29 +73,28 @@ namespace GameRes.Formats.Softpal
                 var name = string.Format("{0}#{1:D5}", base_name, i);
                 var offset = next_offset;
                 next_offset = index_offset == data_offset ? 0 : file.View.ReadUInt32 (index_offset);
-                if (uint.MaxValue == next_offset)
-                    break;
-                else if (0 == next_offset)
-                    next_offset = (uint)file.MaxOffset;
-                else if (next_offset < offset)
+                if (uint.MaxValue == next_offset || next_offset < offset)
                     break;
                 uint size = next_offset - offset;
                 if (size < 4)
                     continue;
                 Entry entry;
                 if (is_pic)
-                    entry = new Entry { Name = name, Type = "image", Offset = offset };
-                else if (is_audio)
-                    entry = new Entry { Name = name + ".wav", Type = "audio", Offset = offset };
+                    entry = new Entry { Name = name, Type = "image" };
+                else if (is_bgm)
+                    entry = new Entry { Name = name + ".wav", Type = "audio" };
                 else
                     entry = new AutoEntry (name, () => {
                         uint signature = file.View.ReadUInt32 (offset);
                         uint s16 = signature & 0xFFFF;
                         if (1 == s16 || 3 == s16 || 4 == s16)
                             return s_PicFormat.Value;
+                        if (size > 0x200 && (size >> 9) == (signature >> 9))
+                            return AudioFormat.Wav;
                         return AutoEntry.DetectFileType (signature);
-                    }) { Offset = offset };
+                    });
 
+                entry.Offset = offset;
                 entry.Size = size;
                 if (!entry.CheckPlacement (file.MaxOffset))
                     return null;
@@ -101,5 +104,187 @@ namespace GameRes.Formats.Softpal
                 return null;
             return new ArcFile (file, this, dir);
         }
+
+        ArcFile OpenTpArc (ArcView file)
+        {
+            uint index_offset = 0x20;
+            uint data_offset;
+            for (;;)
+            {
+                data_offset = file.View.ReadUInt32 (index_offset);
+                if (0 != data_offset)
+                    break;
+                index_offset += 0x10;
+                if (0xA010 == index_offset)
+                    return null;
+            }
+            if (data_offset >= file.MaxOffset)
+                return null;
+            var dir = new List<Entry>();
+            while (index_offset < data_offset)
+            {
+                var offset = file.View.ReadUInt32 (index_offset);
+                if (0 != offset)
+                {
+                    var name = string.Format("TP#{0:D5}.wav", index_offset/0x10 - 1);
+                    var entry = new Entry {
+                        Name = name,
+                        Type = "audio",
+                        Offset = offset,
+                        Size = 0x402 * file.View.ReadUInt32 (index_offset+4),
+                    };
+                    if (!entry.CheckPlacement (file.MaxOffset))
+                        return null;
+                    dir.Add (entry);
+                }
+                index_offset += 0x10;
+            }
+            return new TpArchive (file, this, dir);
+        }
+
+        public override Stream OpenEntry (ArcFile arc, Entry entry)
+        {
+            if (arc is TpArchive)
+                return OpenVoiceEntry (arc, entry);
+            else if ("audio" == entry.Type)
+                return OpenAudioEntry (arc, entry);
+            else
+                return base.OpenEntry (arc, entry);
+        }
+
+        Stream OpenAudioEntry (ArcFile arc, Entry entry)
+        {
+            var offset = entry.Offset;
+            int size = arc.File.View.ReadInt32 (offset);
+            offset += 4;
+            int chunk_count = size >> 9;
+            int pcm_size = chunk_count * 0x400;
+            var output = new MemoryStream (0x24 + pcm_size);
+            using (var wav = new BinaryWriter (output, Encoding.ASCII, true))
+            {
+                WriteWavHeader (wav, 2, 22050, pcm_size);
+                var buffer = new byte[0x204];
+                for (int chunk = 0; chunk < chunk_count; ++chunk)
+                {
+                    arc.File.View.Read (offset, buffer, 0, 0x204);
+                    offset += 0x204;
+                    int src = 0;
+                    var data_offset = wav.BaseStream.Position;
+                    for (int channel = 0; channel < 2; ++channel)
+                    {
+                        int addend = buffer[src++] << 8;
+                        int pcm = LittleEndian.ToInt16 (buffer, src);
+                        src += 2;
+                        wav.Write ((short)pcm);
+                        wav.BaseStream.Position = data_offset + channel * 2;
+                        for (int i = 0; i < 255; ++i)
+                        {
+                            byte v = buffer[src++];
+                            int diff = v + addend;
+                            pcm += WaveTable1.Value[diff]; 
+                            if (pcm > 32767)
+                                pcm = 32767;
+                            else if (pcm < -32767)
+                                pcm = -32767;
+                            wav.Write ((short)pcm);
+                            wav.BaseStream.Seek (2, SeekOrigin.Current);
+                            addend += WaveTable2.Value[v];
+                            if (addend < 0)
+                                addend = 0;
+                            else if (addend >= 16384)
+                                addend = 16128;
+                        }
+                        wav.BaseStream.Seek (0, SeekOrigin.End);
+                    }
+                }
+            }
+            output.Position = 0;
+            return output;
+        }
+
+        Stream OpenVoiceEntry (ArcFile arc, Entry entry)
+        {
+            int remaining = (int)entry.Size;
+            int chunk_count = remaining / 0x402;
+            int pcm_size = chunk_count * 0x800;
+            var output = new MemoryStream (0x24 + pcm_size);
+            var offset = entry.Offset;
+            using (var wav = new BinaryWriter (output, Encoding.ASCII, true))
+            {
+                WriteWavHeader (wav, 1, 22050, pcm_size);
+                var buffer = new byte[0x402];
+                while (remaining > 0)
+                {
+                    arc.File.View.Read (offset, buffer, 0, 0x402);
+                    offset += 0x402;
+                    remaining -= 0x402;
+                    int pcm = LittleEndian.ToInt16 (buffer, 1);
+                    int addend = buffer[0] << 8;
+                    wav.Write ((short)pcm);
+                    for (int src = 3; src < buffer.Length; ++src)
+                    {
+                        byte v = buffer[src];
+                        int diff = v + addend;
+                        pcm += WaveTable1.Value[diff];
+                        if (pcm > 32767)
+                            pcm = 32767;
+                        else if (pcm < -32767)
+                            pcm = -32767;
+                        wav.Write ((short)pcm);
+                        addend += WaveTable2.Value[v];
+                        if (addend < 0)
+                            addend = 0;
+                        else if (addend >= 16384)
+                            addend = 16128;
+                    }
+                }
+            }
+            output.Position = 0;
+            return output;
+        }
+
+        void WriteWavHeader (BinaryWriter wav, short channels, int freq, int pcm_size)
+        {
+            wav.Write ("RIFF".ToCharArray());
+            wav.Write (0x24 + pcm_size);
+            wav.Write ("WAVE".ToCharArray());
+            wav.Write ("fmt ".ToCharArray());
+            wav.Write (0x10);
+            wav.Write ((ushort)1);
+            wav.Write ((ushort)channels);
+            wav.Write (freq);
+            wav.Write (freq*channels*2);
+            wav.Write ((ushort)(channels*2));
+            wav.Write ((ushort)16);
+            wav.Write ("data".ToCharArray());
+            wav.Write (pcm_size);
+        }
+
+        static readonly Lazy<short[]> WaveTable1 = new Lazy<short[]> (() => LoadWaveTable ("WaveTable1"));
+        static readonly Lazy<short[]> WaveTable2 = new Lazy<short[]> (() => LoadWaveTable ("WaveTable2"));
+
+        static short[] LoadWaveTable (string name)
+        {
+
+            var assembly = typeof(VafsOpener).Assembly;
+            using (var stream = assembly.GetManifestResourceStream ("GameRes.Formats.Softpal."+name))
+            {
+                if (null == stream)
+                    return null;
+                var src = new byte[stream.Length];
+                stream.Read (src, 0, src.Length);
+                var array = new short[src.Length/2];
+                Buffer.BlockCopy (src, 0, array, 0, src.Length);
+                return array;
+            }
+        }
+    }
+
+    internal class TpArchive : ArcFile
+    {
+        public TpArchive (ArcView arc, ArchiveFormat impl, ICollection<Entry> dir)
+            : base (arc, impl, dir)
+        {
+        }
     }
 }