ScummVM API documentation
compression.h
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/* ScummVM - Graphic Adventure Engine
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*
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* ScummVM is the legal property of its developers, whose names
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* are too numerous to list here. Please refer to the COPYRIGHT
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* file distributed with this source distribution.
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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*/
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#ifndef MADS_COMPRESSION_H
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#define MADS_COMPRESSION_H
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#include "common/memstream.h"
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#include "common/stream.h"
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#include "mads/mads.h"
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namespace
MADS
{
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enum
CompressionType { COMPRESS_NONE = 0, COMPRESS_FAB = 1 };
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struct
MadsPackEntry
{
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public
:
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CompressionType _type;
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byte _priority;
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uint32 _size;
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uint32 _compressedSize;
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byte *_data;
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};
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class
MadsPack
{
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private
:
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MadsPackEntry
*_items;
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int
_count;
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int
_dataOffset;
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void
initialize(
Common::SeekableReadStream
*stream);
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public
:
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static
bool
isCompressed(
Common::SeekableReadStream
*stream);
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MadsPack
(
Common::SeekableReadStream
*stream);
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MadsPack
(
const
Common::Path
&resourceName,
MADSEngine
*_vm);
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~
MadsPack
();
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int
getCount()
const
{
return
_count; }
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MadsPackEntry
&getItem(
int
index)
const
{
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assert(index < _count);
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return
_items[index]; }
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MadsPackEntry
&operator[](
int
index)
const
{
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assert(index < _count);
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return
_items[index];
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}
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Common::MemoryReadStream
*getItemStream(
int
index) {
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assert(index < _count);
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return
new
Common::MemoryReadStream
(_items[index]._data, _items[index]._size,
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DisposeAfterUse::NO);
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}
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int
getDataOffset()
const
{
return
_dataOffset; }
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};
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class
FabDecompressor
{
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private
:
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int
_bitsLeft;
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uint32 _bitBuffer;
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const
byte *_srcData, *_srcP;
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int
_srcSize;
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int
getBit();
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public
:
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void
decompress(
const
byte *srcData,
int
srcSize, byte *destData,
int
destSize);
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};
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}
// End of namespace MADS
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#endif
MADS::MadsPackEntry
Definition:
compression.h:34
MADS::FabDecompressor
Definition:
compression.h:72
Common::Path
Definition:
path.h:52
Common::SeekableReadStream
Definition:
stream.h:745
MADS::MadsPack
Definition:
compression.h:43
Common::MemoryReadStream
Definition:
memstream.h:43
MADS::MADSEngine
Definition:
mads.h:87
MADS
Definition:
action.h:28
engines
mads
compression.h
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