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(WWA): another compression variation.

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morkt
2016-07-27 00:20:13 +04:00
parent ef2552deec
commit ebcb29a44e
1 changed files with 98 additions and 63 deletions
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161
ArcFormats/WildBug/AudioWWA.cs
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@@ -2,7 +2,7 @@
//! \date Mon Aug 10 11:48:29 2015
//! \brief Wild Bug compressed audio format.
//
// Copyright (C) 2015 by morkt
// Copyright (C) 2015-2016 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
@@ -49,36 +49,17 @@ namespace GameRes.Formats.WildBug
if (1 != header[0xC] || 0 == count || 0 == dir_size)
return null;
return new WwaInput (file, count, dir_size);
}
public override void Write (SoundInput source, Stream output)
{
throw new System.NotImplementedException ("WwaFormat.Write not implemenented");
}
}
internal class WwaInput : SoundInput
{
public override string SourceFormat { get { return "raw"; } }
public override int SourceBitrate
{
get { return (int)Format.AverageBytesPerSecond * 8; }
}
public WwaInput (Stream file, int count, int dir_size) : base (null)
{
file.Position = 0x10;
var header = new byte[count * dir_size];
header = new byte[count * dir_size];
if (header.Length != file.Read (header, 0, header.Length))
throw new InvalidFormatException();
var section = WpxSection.Find (header, 0x20, count, dir_size);
if (null == section || section.UnpackedSize < 0x10 || section.DataFormat != 0x80)
throw new InvalidFormatException();
var fmt = new byte[section.UnpackedSize];
file.Position = section.Offset;
Format = ReadFormat (file);
file.Read (fmt, 0, section.UnpackedSize);
section = WpxSection.Find (header, 0x21, count, dir_size);
if (null == section)
@@ -88,49 +69,32 @@ namespace GameRes.Formats.WildBug
var data = reader.Unpack (section.DataFormat);
if (null == data)
throw new InvalidFormatException();
Source = new MemoryStream (data);
file.Dispose();
}
static WaveFormat ReadFormat (Stream file)
{
var format = new WaveFormat();
using (var input = new ArcView.Reader (file))
int total_size = 20 + fmt.Length + data.Length;
using (var wav_file = new MemoryStream (20 + fmt.Length))
using (var wav = new BinaryWriter (wav_file))
{
format.FormatTag = input.ReadUInt16 ();
format.Channels = input.ReadUInt16 ();
format.SamplesPerSecond = input.ReadUInt32 ();
format.AverageBytesPerSecond = input.ReadUInt32 ();
format.BlockAlign = input.ReadUInt16 ();
format.BitsPerSample = input.ReadUInt16 ();
wav.Write (Wav.Signature);
wav.Write (total_size);
wav.Write (0x45564157); // 'WAVE'
wav.Write (0x20746d66); // 'fmt '
wav.Write (fmt.Length);
wav.Write (fmt);
wav.Write (0x61746164); // 'data'
wav.Write (data.Length);
var wav_header = wav_file.ToArray();
var data_stream = new MemoryStream (data);
var source = new PrefixStream (wav_header, data_stream);
var sound = new WaveInput (source);
file.Dispose();
return sound;
}
return format;
}
#region IO.Stream methods
public override long Position
public override void Write (SoundInput source, Stream output)
{
get { return Source.Position; }
set { Source.Position = value; }
throw new System.NotImplementedException ("WwaFormat.Write not implemenented");
}
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
}
internal class WwaReader : WpxDecoder
@@ -151,24 +115,95 @@ namespace GameRes.Formats.WildBug
else if (0 != (flags & 2))
return UnpackVB(); // sub_461B34
}
else if (0 != (flags & 4))
throw new NotImplementedException ();
else if (0 != (flags & 2))
return UnpackV2();
throw new NotImplementedException ();
}
else
return ReadUncompressed();
}
byte[] UnpackV2 () // 0x02 format
{
m_available = FillBuffer();
if (0 == m_available)
return null;
int step = 4;
if (m_available < step + 0x80)
return null;
int v9 = 3;
int dst = 0;
m_output[dst++] = m_buffer[0];
int remaining = m_output.Length - 1;
m_current = 1 + v9 + 128; // within m_buffer
var ref_table = new byte[0x10000];
if (!FillRefTable (ref_table, 1 + v9))
return null;
while (remaining > 0)
{
while (0 != GetNextBit())
{
int v20 = 0;
int v21 = 0;
v9 = 16384;
for (;;)
{
++v20;
if (0 != GetNextBit())
v21 |= v9;
if (ref_table[2 * v21] == v20)
break;
v9 >>= 1;
if (0 == v9)
return null;
}
m_output[dst++] = ref_table[2 * v21 + 1];
--remaining;
if (0 == remaining)
return m_output;
}
int offset;
int count = 2;
if (0 != GetNextBit())
{
offset = ReadNext();
}
else
{
offset = ReadNext();
offset |= ReadNext() << 8;
count = 3;
}
if (0 == GetNextBit())
{
count += ReadCount();
}
if (remaining < count)
return null;
Binary.CopyOverlapped (m_output, dst - offset - 1, dst, count);
dst += count;
remaining -= count;
}
return m_output;
}
byte[] UnpackVB ()
{
m_available = FillBuffer();
if (0 == m_available)
return null;
var ref_table = new byte[0x10000];
int v6 = -1 & 3;
m_output[0] = m_buffer[0];
int dst = 1;
int v6 = 3;
int dst = 0;
m_output[dst++] = m_buffer[0];
int remaining = m_output.Length - 1;
m_current = 1 + v6 + 128;
var ref_table = new byte[0x10000];
if (!FillRefTable (ref_table, 1 + v6))
return null;
while (remaining > 0)