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(GRP): introduced HDJ compression variation.

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This commit is contained in:
morkt 2017-01-27 13:22:34 +04:00
parent 86ae93a83b
commit 75de4663b8
1 changed files with 93 additions and 18 deletions
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111
ArcFormats/Ankh/ArcGRP.cs
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@ -102,39 +102,33 @@ namespace GameRes.Formats.Ankh
entry.Size -= 4;
}
if (file.View.AsciiEqual (start_offset, "BM"))
{
entry.Name = Path.ChangeExtension (entry.Name, "bmp");
entry.Type = "image";
}
entry.ChangeType (ImageFormat.Bmp);
}
else if (file.View.AsciiEqual (entry.Offset+4, "HDJ\0"))
{
if (file.View.AsciiEqual (entry.Offset+12, "BM"))
{
entry.Name = Path.ChangeExtension (entry.Name, "bmp");
entry.Type = "image";
}
entry.ChangeType (ImageFormat.Bmp);
else if (file.View.AsciiEqual (entry.Offset+12, "MThd"))
entry.Name = Path.ChangeExtension (entry.Name, "mid");
entry.UnpackedSize = file.View.ReadUInt32 (entry.Offset);
entry.IsPacked = true;
}
else if (file.View.AsciiEqual (entry.Offset+4, "OggS"))
{
entry.Name = Path.ChangeExtension (entry.Name, "ogg");
entry.Type = "audio";
entry.ChangeType (OggAudio.Instance);
entry.Offset += 4;
entry.Size -= 4;
}
else if (entry.Size > 12 && file.View.AsciiEqual (entry.Offset+8, "RIFF"))
{
entry.Name = Path.ChangeExtension (entry.Name, "wav");
entry.Type = "audio";
entry.ChangeType (AudioFormat.Wav);
entry.UnpackedSize = file.View.ReadUInt32 (entry.Offset);
entry.IsPacked = true;
}
else if (file.View.AsciiEqual (entry.Offset, "BM"))
{
entry.Name = Path.ChangeExtension (entry.Name, "bmp");
entry.Type = "image";
entry.ChangeType (ImageFormat.Bmp);
}
else if (entry.Size > 0x16 && IsAudioEntry (file, entry))
{
@ -298,7 +292,33 @@ namespace GameRes.Formats.Ankh
m_input = input;
}
// Different games have slightly different formats using exact same headers,
// so have to invent some flawed format recognition here.
enum GrpVariant { Default, BoD };
static GrpVariant LastUsedMethod = GrpVariant.Default;
static GrpVariant GetOppositeVariant ()
{
return GrpVariant.Default == LastUsedMethod ? GrpVariant.BoD : GrpVariant.Default;
}
public void UnpackHDJ (byte[] output, int dst)
{
try
{
if (UnpackHDJVariant (output, dst, LastUsedMethod))
return;
}
catch { /* ignore unpack errors */ }
var method = GetOppositeVariant();
m_input.Position = 0;
if (!UnpackHDJVariant (output, dst, method))
throw new InvalidFormatException();
LastUsedMethod = method;
}
private bool UnpackHDJVariant (byte[] output, int dst, GrpVariant method)
{
ResetBits();
int word_count = 0;
@ -327,13 +347,17 @@ namespace GameRes.Formats.Ankh
}
else
{
count = GetBits (2) + 2;
long_count = 5 == count;
if (method == GrpVariant.Default)
count = GetBits (2);
if (0 == byte_count)
{
next_byte = m_input.ReadUInt32();
byte_count = 4;
}
if (method != GrpVariant.Default)
count = GetBits (2);
count += 2;
long_count = 5 == count;
offset = (int)(next_byte | 0xFFFFFF00);
next_byte >>= 8;
--byte_count;
@ -348,8 +372,8 @@ namespace GameRes.Formats.Ankh
count += GetBits (n) + 1;
}
int src = dst + offset;
if (src < 0)
throw new InvalidDataException();
if (src < 0 || src >= dst || dst + count > output.Length)
return false;
Binary.CopyOverlapped (output, src, dst, count);
dst += count;
}
@ -365,9 +389,60 @@ namespace GameRes.Formats.Ankh
--byte_count;
}
}
return true;
}
public void UnpackS (byte[] output, int dst, int channels)
{
try
{
if (UnpackSVariant (output, dst, channels, LastUsedMethod))
return;
}
catch { /* ignore parse errors */ }
var method = GetOppositeVariant();
m_input.Position = 0;
if (UnpackSVariant (output, dst, channels, method))
LastUsedMethod = method;
}
bool UnpackSVariant (byte[] output, int dst, int channels, GrpVariant method)
{
if (GrpVariant.Default == method)
UnpackSv2 (output, dst, channels);
else
UnpackSv1 (output, dst, channels);
return m_input.PeekByte() == -1; // rather loose test, but whatever
}
void UnpackSv1 (byte[] output, int dst, int channels)
{
ResetBits();
short last_word = 0;
while (dst < output.Length)
{
int word;
if (GetNextBit() != 0)
{
if (GetNextBit() != 0)
word = GetBits (10) << 6;
else
word = 0;
}
else
{
int adjust = GetBits (5) << 6;
if (0 != (adjust & 0x400))
adjust = -(adjust & 0x3FF);
word = last_word + adjust;
}
last_word = (short)word;
LittleEndian.Pack (last_word, output, dst);
dst += 2;
}
}
void UnpackSv2 (byte[] output, int dst, int channels)
{
if (channels != 1)
m_input.Seek ((channels-1) * 4, SeekOrigin.Current);