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(VawAudio): decode 'PACKTYPE=1' files.

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This commit is contained in:
morkt 2016-06-12 00:14:56 +04:00
parent bbc58bd0e0
commit e05369546e
1 changed files with 62 additions and 1 deletions
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63
ArcFormats/BlackCyc/AudioVAW.cs
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@ -2,7 +2,7 @@
//! \date Sat Aug 01 12:28:22 2015
//! \brief Black Cyc audio file.
//
// 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
@ -60,6 +60,10 @@ namespace GameRes.Formats.BlackCyc
format = Wav;
offset = 0x40;
}
else if (1 == header.PackType)
{
return Unpack (file);
}
else if (2 == header.PackType)
{
format = OggAudio.Instance;
@ -80,5 +84,62 @@ namespace GameRes.Formats.BlackCyc
{
throw new System.NotImplementedException ("EdimFormat.Write not implemenented");
}
SoundInput Unpack (Stream input)
{
input.Position = 0x40;
var header = new byte[0x24];
if (0x14 != input.Read (header, 0, 0x14))
return null;
int fmt_size = LittleEndian.ToInt32 (header, 0x10);
if (fmt_size + input.Position > input.Length)
return null;
int header_size = fmt_size + 0x14;
if (header_size > header.Length)
Array.Resize (ref header, header_size);
if (fmt_size != input.Read (header, 0x14, fmt_size))
return null;
int riff_size = LittleEndian.ToInt32 (header, 4) + 8;
int data_size = riff_size - header_size;
var pcm = new MemoryStream (riff_size);
try
{
pcm.Write (header, 0, header_size);
using (var output = new BinaryWriter (pcm, Encoding.Default, true))
using (var bits = new LsbBitStream (input, true))
{
int written = 0;
short sample = 0;
while (written < data_size)
{
int c = bits.GetBits (4);
if (-1 == c)
c = 0;
int code = 0;
if (c > 0)
code = bits.GetBits (c) << (32 - c);
code >>= 32 - c;
int sign = code >> 31;
code ^= 0x4000 >> (15 - c);
code -= sign;
sample += (short)code;
output.Write (sample);
written += 2;
}
}
pcm.Position = 0;
var sound = Wav.TryOpen (pcm);
if (sound != null)
input.Dispose();
else
pcm.Dispose();
return sound;
}
catch
{
pcm.Dispose();
throw;
}
}
}
}