diff options
Diffstat (limited to 'plugins/sid/sidplay-libs/libsidplay/src/sidtune/PP20.h')
-rw-r--r-- | plugins/sid/sidplay-libs/libsidplay/src/sidtune/PP20.h | 70 |
1 files changed, 70 insertions, 0 deletions
diff --git a/plugins/sid/sidplay-libs/libsidplay/src/sidtune/PP20.h b/plugins/sid/sidplay-libs/libsidplay/src/sidtune/PP20.h new file mode 100644 index 00000000..74e7f5f7 --- /dev/null +++ b/plugins/sid/sidplay-libs/libsidplay/src/sidtune/PP20.h @@ -0,0 +1,70 @@ +/* + * /home/ms/files/source/libsidtune/RCS/PP20.h,v + * + * PowerPacker (AMIGA) "PP20" format decompressor. + * Copyright (C) Michael Schwendt <mschwendt@yahoo.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + */ + +#ifndef PP_DECOMPRESSOR_H +#define PP_DECOMPRESSOR_H + +#include "PP20_Defs.h" + +class PP20 +{ + public: + + PP20(); + + bool isCompressed(const void* source, const udword_ppt size); + + // If successful, allocates a new buffer containing the + // uncompresse data and returns the uncompressed length. + // Else, returns 0. + udword_ppt decompress(const void* source, + udword_ppt size, + ubyte_ppt** destRef); + + const char* getStatusString() { return statusString; } + + private: + bool checkEfficiency(const void* source); + + void bytesTOdword(); + udword_ppt readBits(int count); + void bytes(); + void sequence(); + + static const char* PP_ID; + + ubyte_ppt efficiency[4]; + + const ubyte_ppt* sourceBeg; + const ubyte_ppt* readPtr; + + const ubyte_ppt* destBeg; + ubyte_ppt* writePtr; + + udword_ppt current; // compressed data longword + int bits; // number of bits in 'current' to evaluate + + bool globalError; // exception-free version of code + + const char* statusString; +}; + +#endif /* PP_DECOMPRESSOR_H */ |