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(WbmReader): stream i/o methods moved to separate class.

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This commit is contained in:
morkt 2015-08-18 00:17:50 +04:00
parent 52bc79bb96
commit f5211b18c3
1 changed files with 98 additions and 94 deletions
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192
ArcFormats/ImageWBM.cs
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@ -185,21 +185,10 @@ namespace GameRes.Formats.WildBug
}
}
internal class WbmReader
internal class WbmReader : WpxDecoder
{
Stream m_input;
byte[] m_output;
int m_packed_size;
int m_start_pos;
public byte[] Data { get { return m_output; } }
public WbmReader (Stream input, WpxSection section)
public WbmReader (Stream input, WpxSection section) : base (input, section)
{
m_input = input;
m_start_pos = section.Offset;
m_output = new byte[section.UnpackedSize];
m_packed_size = section.PackedSize;
}
void GenerateOffsetTableV1 (int[] offset_table, int stride, int pixel_size)
@ -259,7 +248,7 @@ namespace GameRes.Formats.WildBug
try
{
ResetInput();
if (0 == (flags & 0x80) && 0 != m_packed_size)
if (0 == (flags & 0x80) && 0 != PackedSize)
{
byte[] ref_table = new byte[0x10000];
if (0 != (flags & 1))
@ -287,8 +276,8 @@ namespace GameRes.Formats.WildBug
else
return UnpackV0 (offset_table, pixel_size);
}
else if (m_output.Length == m_input.Read (m_output, 0, m_output.Length))
return m_output;
else
return ReadUncompressed();
}
catch
{
@ -467,8 +456,6 @@ namespace GameRes.Formats.WildBug
{
byte[] v46 = BuildTable();
int min_count = 1 == pixel_size ? 2 : 1;
if (0 == m_packed_size)
return null;
m_available = FillBuffer();
if (0 == m_available)
return null;
@ -553,8 +540,6 @@ namespace GameRes.Formats.WildBug
{
byte[] v48 = BuildTable();
int min_count = 1 == pixel_size ? 2 : 1;
if (0 == m_packed_size)
return null;
m_available = FillBuffer();
if (0 == m_available)
return null;
@ -633,8 +618,6 @@ namespace GameRes.Formats.WildBug
// int sub_409F70(void *a1, FILE *stream, void *ptr, void *a4, unsigned int packed_size, int *offset_table, int unpacked_size, unsigned int pixel_size)
{
int min_count = 1 == pixel_size ? 2 : 1;
if (0 == m_packed_size)
return null;
m_available = FillBuffer();
if (0 == m_available)
@ -709,8 +692,6 @@ namespace GameRes.Formats.WildBug
{
byte[] v48 = BuildTable();
int min_count = 1 == pixel_size ? 2 : 1;
if (0 == m_packed_size)
return null;
m_available = FillBuffer();
if (0 == m_available)
return null;
@ -778,8 +759,6 @@ namespace GameRes.Formats.WildBug
//int sub_40A3C4(void *a1, FILE *stream, const void *ptr, unsigned int packed_size, int *offset_table, int unpacked_size, unsigned int pixel_size)
{
int min_count = 1 == pixel_size ? 2 : 1;
if (0 == m_packed_size)
return null;
m_available = FillBuffer();
if (0 == m_available)
return null;
@ -835,8 +814,6 @@ namespace GameRes.Formats.WildBug
// int sub_40B83C(void *a1, FILE *stream, const void *ptr, unsigned int packed_size, int *a5, int unpacked_size, unsigned int pixel_size)
{
int min_count = 1 == pixel_size ? 2 : 1;
if (0 == m_packed_size)
return null;
m_available = FillBuffer();
if (0 == m_available)
return null;
@ -883,23 +860,35 @@ namespace GameRes.Formats.WildBug
}
return m_output;
}
}
int ReadCount ()
internal class WpxDecoder
{
Stream m_input;
protected byte[] m_output;
int m_packed_size;
int m_start_pos;
public byte[] Data { get { return m_output; } }
protected int PackedSize { get { return m_packed_size; } }
protected WpxDecoder (Stream input, WpxSection section)
{
int n = 1;
while (0 == GetNextBit())
{
++n;
}
int count = 1;
for (int i = 0; i < n; ++i)
{
count += count + GetNextBit();
}
return count - 1;
m_input = input;
m_start_pos = section.Offset;
m_output = new byte[section.UnpackedSize];
m_packed_size = section.PackedSize;
}
static byte[] BuildTable () // sub_4090E0
protected byte[] ReadUncompressed ()
{
if (m_output.Length == m_input.Read (m_output, 0, m_output.Length))
return m_output;
else
return null;
}
protected static byte[] BuildTable () // sub_4090E0
{
var table = new byte[0x100*0x100];
for (int i = 0; i < 0x100; ++i)
@ -913,59 +902,7 @@ namespace GameRes.Formats.WildBug
return table;
}
byte[] m_buffer = new byte[0x8000];
int m_current = 0;
int m_available = 0;
byte ReadNext ()
{
if (m_current >= m_available)
{
m_available = FillBuffer();
if (0 == m_available)
throw new InvalidFormatException ("Unexpected end of file");
m_current = 0;
}
return m_buffer[m_current++];
}
int m_input_remaining;
void ResetInput ()
{
m_input.Position = m_start_pos;
m_input_remaining = m_packed_size;
}
int FillBuffer () // sub_409B02
{
int read = 0;
if (m_input_remaining > 0)
{
int size = Math.Min (m_input_remaining, 0x8000);
m_input_remaining -= size;
read = m_input.Read (m_buffer, 0, size);
}
return read;
}
byte m_bits;
int m_bit_count = 0;
int GetNextBit ()
{
if (0 == m_bit_count)
{
m_bits = ReadNext();
m_bit_count = 8;
}
int bit = m_bits >> 7;
m_bits <<= 1;
--m_bit_count;
return bit;
}
bool FillRefTable (byte[] table, int src)
protected bool FillRefTable (byte[] table, int src)
{
m_bits = m_buffer[m_current++];
m_bit_count = 8;
@ -1003,5 +940,72 @@ namespace GameRes.Formats.WildBug
}
return true;
}
protected byte[] m_buffer = new byte[0x8000];
protected int m_current = 0;
protected int m_available = 0;
protected byte ReadNext ()
{
if (m_current >= m_available)
{
m_available = FillBuffer();
if (0 == m_available)
throw new InvalidFormatException ("Unexpected end of file");
m_current = 0;
}
return m_buffer[m_current++];
}
protected int ReadCount ()
{
int n = 1;
while (0 == GetNextBit())
{
++n;
}
int count = 1;
for (int i = 0; i < n; ++i)
{
count += count + GetNextBit();
}
return count - 1;
}
protected int m_input_remaining;
protected void ResetInput ()
{
m_input.Position = m_start_pos;
m_input_remaining = m_packed_size;
}
protected int FillBuffer () // sub_409B02
{
int read = 0;
if (m_input_remaining > 0)
{
int size = Math.Min (m_input_remaining, 0x8000);
m_input_remaining -= size;
read = m_input.Read (m_buffer, 0, size);
}
return read;
}
protected byte m_bits;
protected int m_bit_count = 0;
protected int GetNextBit ()
{
if (0 == m_bit_count)
{
m_bits = ReadNext();
m_bit_count = 8;
}
int bit = m_bits >> 7;
m_bits <<= 1;
--m_bit_count;
return bit;
}
}
}