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(MAI4): format may have different compression encoding without any indication in the header.

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haven't figured out yet how to work around it.
This commit is contained in:
morkt 2017-02-10 18:04:05 +04:00
parent 8b9ddad110
commit 4929d1efd1
1 changed files with 102 additions and 20 deletions
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122
ArcFormats/ShiinaRio/ImageMI4.cs
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@ -52,11 +52,9 @@ namespace GameRes.Formats.ShiinaRio
public override ImageData Read (IBinaryStream stream, ImageMetaData info)
{
using (var reader = new Reader (stream, (int)info.Width, (int)info.Height))
{
reader.Unpack ();
return ImageData.Create (info, PixelFormats.Bgr24, null, reader.Data);
}
var reader = new Reader (stream, (int)info.Width, (int)info.Height);
reader.Unpack();
return ImageData.Create (info, PixelFormats.Bgr24, null, reader.Data, reader.Stride);
}
public override void Write (Stream file, ImageData image)
@ -64,13 +62,14 @@ namespace GameRes.Formats.ShiinaRio
throw new System.NotImplementedException ("Mi4Format.Write not implemented");
}
internal sealed class Reader : IDisposable
internal sealed class Reader
{
IBinaryStream m_input;
byte[] m_output;
int m_stride;
public byte[] Data { get { return m_output; } }
public int Stride { get { return m_stride; } }
public Reader (IBinaryStream file, int width, int height)
{
@ -79,6 +78,14 @@ namespace GameRes.Formats.ShiinaRio
m_output = new byte[m_stride*height];
}
public void Unpack ()
{
m_input.Position = 0x10;
m_bit_count = 0;
LoadBits();
UnpackV2();
}
int m_bit_count;
uint m_bits;
@ -107,19 +114,101 @@ namespace GameRes.Formats.ShiinaRio
uint GetBits (int count)
{
uint bits = 0;
while (count --> 0)
int avail_bits = Math.Min (count, m_bit_count);
uint bits = m_bits >> (32 - avail_bits);
m_bits <<= avail_bits;
m_bit_count -= avail_bits;
count -= avail_bits;
if (0 == m_bit_count)
{
bits = (bits << 1) | GetBit();
LoadBits();
if (count > 0)
{
bits = bits << count | m_bits >> (32 - count);
m_bits <<= count;
m_bit_count -= count;
}
}
return bits;
}
public void Unpack ()
void UnpackV1 ()
{
int dst = 0;
byte b = 0, g = 0, r = 0;
while (dst < m_output.Length)
{
if (GetBit() == 0)
{
if (GetBit() != 0)
{
b = m_input.ReadUInt8();
g = m_input.ReadUInt8();
r = m_input.ReadUInt8();
}
else if (GetBit() != 0)
{
byte v = (byte)GetBits (2);
if (3 == v)
{
b = m_output[dst - m_stride];
g = m_output[dst - m_stride + 1];
r = m_output[dst - m_stride + 2];
}
else
{
b += (byte)(v - 1);
g += (byte)(GetBits(2) - 1);
r += (byte)(GetBits(2) - 1);
}
}
else if (GetBit() != 0)
{
byte v = (byte)(GetBits(3));
if (7 == v)
{
b = m_output[dst - m_stride + 3];
g = m_output[dst - m_stride + 4];
r = m_output[dst - m_stride + 5];
}
else
{
b += (byte)(v - 3);
g += (byte)(GetBits(3) - 3);
r += (byte)(GetBits(3) - 3);
}
}
else if (GetBit() != 0)
{
byte v = (byte)GetBits (4);
if (0xF == v)
{
b = m_output[dst - m_stride - 3];
g = m_output[dst - m_stride - 2];
r = m_output[dst - m_stride - 1];
}
else
{
b += (byte)(v - 7);
g += (byte)(GetBits(4) - 7);
r += (byte)(GetBits(4) - 7);
}
}
else
{
b += (byte)(GetBits(5) - 15);
g += (byte)(GetBits(5) - 15);
r += (byte)(GetBits(5) - 15);
}
}
m_output[dst++] = b;
m_output[dst++] = g;
m_output[dst++] = r;
}
}
void UnpackV2 ()
{
m_input.Position = 0x10;
m_bit_count = 0;
LoadBits();
int dst = 0;
byte b = 0, g = 0, r = 0;
while (dst < m_output.Length)
@ -207,13 +296,6 @@ namespace GameRes.Formats.ShiinaRio
m_output[dst++] = r;
}
}
#region IDisposable Members
public void Dispose ()
{
GC.SuppressFinalize (this);
}
#endregion
}
}
}