Data Structures | |
struct | SCRATCH_DATA |
Defines | |
#define | BITBUFSIZ 32 |
#define | MAXMATCH 256 |
#define | THRESHOLD 3 |
#define | CODE_BIT 16 |
#define | BAD_TABLE - 1 |
#define | NC (0xff + MAXMATCH + 2 - THRESHOLD) |
#define | CBIT 9 |
#define | MAXPBIT 5 |
#define | TBIT 5 |
#define | MAXNP ((1U << MAXPBIT) - 1) |
#define | NT (CODE_BIT + 3) |
#define | NPT MAXNP |
Functions | |
VOID | FillBuf (IN SCRATCH_DATA *Sd, IN UINT16 NumOfBits) |
UINT32 | GetBits (IN SCRATCH_DATA *Sd, IN UINT16 NumOfBits) |
UINT16 | MakeTable (IN SCRATCH_DATA *Sd, IN UINT16 NumOfChar, IN UINT8 *BitLen, IN UINT16 TableBits, OUT UINT16 *Table) |
UINT32 | DecodeP (IN SCRATCH_DATA *Sd) |
UINT16 | ReadPTLen (IN SCRATCH_DATA *Sd, IN UINT16 nn, IN UINT16 nbit, IN UINT16 Special) |
VOID | ReadCLen (SCRATCH_DATA *Sd) |
UINT16 | DecodeC (SCRATCH_DATA *Sd) |
VOID | Decode (SCRATCH_DATA *Sd) |
Copyright (c) 2006 - 2010, Intel Corporation. All rights reserved.
This program and the accompanying materials are licensed and made available under the terms and conditions of the BSD License which accompanies this distribution. The full text of the license may be found at http://opensource.org/licenses/bsd-license.php.
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
#define BAD_TABLE - 1 |
Referenced by MakeTable().
#define BITBUFSIZ 32 |
Referenced by DecodeC(), DecodeP(), GetBits(), ReadCLen(), ReadPTLen(), and UefiDecompress().
#define CBIT 9 |
Referenced by ReadCLen().
#define CODE_BIT 16 |
#define MAXMATCH 256 |
#define MAXPBIT 5 |
#define NC (0xff + MAXMATCH + 2 - THRESHOLD) |
Referenced by DecodeC(), MakeTable(), and ReadCLen().
#define NPT MAXNP |
Referenced by ReadPTLen().
#define NT (CODE_BIT + 3) |
Referenced by DecodeC(), and ReadCLen().
#define TBIT 5 |
Referenced by DecodeC().
#define THRESHOLD 3 |
Referenced by Decode().
VOID Decode | ( | SCRATCH_DATA * | Sd | ) |
Decode the source data and put the resulting data into the destination buffer.
Sd | The global scratch data. |
References BIT8, DecodeC(), DecodeP(), SCRATCH_DATA::mBadTableFlag, SCRATCH_DATA::mDstBase, SCRATCH_DATA::mOrigSize, SCRATCH_DATA::mOutBuf, and THRESHOLD.
Referenced by UefiDecompress().
UINT16 DecodeC | ( | SCRATCH_DATA * | Sd | ) |
Decode a character/length value.
Read one value from mBitBuf, Get one code from mBitBuf. If it is at block boundary, generates Huffman code mapping table for Extra Set, Code&Len Set and Position Set.
Sd | The global scratch data. |
References BITBUFSIZ, FillBuf(), GetBits(), Mask, MAXNP, SCRATCH_DATA::mBadTableFlag, SCRATCH_DATA::mBitBuf, SCRATCH_DATA::mBlockSize, SCRATCH_DATA::mCLen, SCRATCH_DATA::mCTable, SCRATCH_DATA::mLeft, SCRATCH_DATA::mPBit, SCRATCH_DATA::mRight, NC, NT, ReadCLen(), ReadPTLen(), and TBIT.
Referenced by Decode().
UINT32 DecodeP | ( | IN SCRATCH_DATA * | Sd | ) |
VOID FillBuf | ( | IN SCRATCH_DATA * | Sd, | |
IN UINT16 | NumOfBits | |||
) |
Read NumOfBit of bits from source into mBitBuf.
Shift mBitBuf NumOfBits left. Read in NumOfBits of bits from source.
Sd | The global scratch data. | |
NumOfBits | The number of bits to shift and read. |
Referenced by DecodeC(), DecodeP(), GetBits(), ReadCLen(), ReadPTLen(), and UefiDecompress().
UINT32 GetBits | ( | IN SCRATCH_DATA * | Sd, | |
IN UINT16 | NumOfBits | |||
) |
Get NumOfBits of bits out from mBitBuf.
Get NumOfBits of bits out from mBitBuf. Fill mBitBuf with subsequent NumOfBits of bits from source. Returns NumOfBits of bits that are popped out.
Sd | The global scratch data. | |
NumOfBits | The number of bits to pop and read. |
References BITBUFSIZ, and FillBuf().
Referenced by DecodeC(), DecodeP(), ReadCLen(), and ReadPTLen().
UINT16 MakeTable | ( | IN SCRATCH_DATA * | Sd, | |
IN UINT16 | NumOfChar, | |||
IN UINT8 * | BitLen, | |||
IN UINT16 | TableBits, | |||
OUT UINT16 * | Table | |||
) |
Creates Huffman Code mapping table according to code length array.
Creates Huffman Code mapping table for Extra Set, Char&Len Set and Position Set according to code length array. If TableBits > 16, then ASSERT ().
Sd | The global scratch data. | |
NumOfChar | The number of symbols in the symbol set. | |
BitLen | Code length array. | |
TableBits | The width of the mapping table. | |
Table | The table to be created. |
0 | OK. | |
BAD_TABLE | The table is corrupted. |
References ASSERT, BAD_TABLE, Len, Mask, NC, and SetMem16().
Referenced by ReadCLen(), and ReadPTLen().
VOID ReadCLen | ( | SCRATCH_DATA * | Sd | ) |
Reads code lengths for Char&Len Set.
Read in and decode the Char&Len Set Code Length Array, then generate the Huffman Code mapping table for the Char&Len Set.
Sd | The global scratch data. |
References BITBUFSIZ, CBIT, FillBuf(), GetBits(), MakeTable(), Mask, SCRATCH_DATA::mBitBuf, SCRATCH_DATA::mCLen, SCRATCH_DATA::mCTable, SCRATCH_DATA::mLeft, SCRATCH_DATA::mPTLen, SCRATCH_DATA::mPTTable, SCRATCH_DATA::mRight, NC, NT, SetMem(), and SetMem16().
Referenced by DecodeC().
UINT16 ReadPTLen | ( | IN SCRATCH_DATA * | Sd, | |
IN UINT16 | nn, | |||
IN UINT16 | nbit, | |||
IN UINT16 | Special | |||
) |
Reads code lengths for the Extra Set or the Position Set.
Read in the Extra Set or Pointion Set Length Arrary, then generate the Huffman code mapping for them.
Sd | The global scratch data. | |
nn | The number of symbols. | |
nbit | The number of bits needed to represent nn. | |
Special | The special symbol that needs to be taken care of. |
0 | OK. | |
BAD_TABLE | Table is corrupted. |
References ASSERT, BITBUFSIZ, FillBuf(), GetBits(), MakeTable(), Mask, NPT, SetMem(), and SetMem16().
Referenced by DecodeC().