diff options
Diffstat (limited to 'VideoPreview/src/lib/zlib')
| -rw-r--r-- | VideoPreview/src/lib/zlib/zlib.pas | 215 |
1 files changed, 215 insertions, 0 deletions
diff --git a/VideoPreview/src/lib/zlib/zlib.pas b/VideoPreview/src/lib/zlib/zlib.pas new file mode 100644 index 00000000..8d09313f --- /dev/null +++ b/VideoPreview/src/lib/zlib/zlib.pas @@ -0,0 +1,215 @@ +(* + * zlib pascal headers + * This file is part of Free Pascal, released under the LGPL. + *) + +{$ifdef FPC} + {$ifndef NO_SMART_LINK} + {$smartlink on} + {$endif} +{$endif} +unit zlib; + +interface + +{$ifdef FPC} + {$mode objfpc} // Needed for array of const + {$H+} // use long strings + {$PACKRECORDS C} +{$endif} + +uses + ctypes; + +const + ZLIB_VERSION = '1.2.3'; + +{$ifdef MSWINDOWS} + libz = 'zlib1'; +{$else} + libz = 'z'; + {$IFDEF DARWIN} + {$linklib libz} + {$ENDIF} +{$endif} + +type + { Compatible with paszlib } + uInt = cuint; + uLong = culong; + uLongf = uLong; {FAR} + PuLongf = ^uLongf; + z_off_t = clong; + pbyte = ^byte; + bytef = byte; {FAR} + pbytef = ^byte; + voidpf = pointer; + + TAllocfunc = function (opaque: voidpf; items: uInt; size: uInt): voidpf; cdecl; + TFreeFunc = procedure (opaque: voidpf; address: voidpf); cdecl; + + TInternalState = record + end; + PInternalState = ^TInternalstate; + + TZStream = record + next_in: pbytef; + avail_in: uInt; + total_in: uLong; + next_out: pbytef; + avail_out: uInt; + total_out: uLong; + msg: pchar; + state: PInternalState; + zalloc: TAllocFunc; + zfree: TFreeFunc; + opaque: voidpf; + data_type: cint; + adler: uLong; + reserved: uLong; + end; + TZStreamRec = TZStream; + PZstream = ^TZStream; + gzFile = pointer; + + +const + Z_NO_FLUSH = 0; + Z_PARTIAL_FLUSH = 1; + Z_SYNC_FLUSH = 2; + Z_FULL_FLUSH = 3; + Z_FINISH = 4; + Z_BLOCK = 5; + + Z_OK = 0; + Z_STREAM_END = 1; + Z_NEED_DICT = 2; + Z_ERRNO = -(1); + Z_STREAM_ERROR = -(2); + Z_DATA_ERROR = -(3); + Z_MEM_ERROR = -(4); + Z_BUF_ERROR = -(5); + Z_VERSION_ERROR = -(6); + + Z_NO_COMPRESSION = 0; + Z_BEST_SPEED = 1; + Z_BEST_COMPRESSION = 9; + Z_DEFAULT_COMPRESSION = -(1); + + Z_FILTERED = 1; + Z_HUFFMAN_ONLY = 2; + Z_RLE = 3; + Z_FIXED = 4; + Z_DEFAULT_STRATEGY = 0; + + Z_BINARY = 0; + Z_TEXT = 1; + Z_ASCII = Z_TEXT; + Z_UNKNOWN = 2; + + Z_DEFLATED = 8; + + Z_NULL = 0; + +function zlibVersionpchar(): pchar; cdecl; external libz name 'zlibVersion'; +function zlibVersion(): string; + +function deflate(var strm: TZStream; flush: integer): integer; cdecl; external libz name 'deflate'; +function deflateEnd(var strm: TZStream): integer; cdecl; external libz name 'deflateEnd'; +function inflate(var strm: TZStream; flush: integer): integer; cdecl; external libz name 'inflate'; +function inflateEnd(var strm: TZStream): integer; cdecl; external libz name 'inflateEnd'; +function deflateSetDictionary(var strm: TZStream; dictionary: pbytef; dictLength: uInt): integer; cdecl; external libz name 'deflateSetDictionary'; +function deflateCopy(var dest, source: TZstream): integer; cdecl; external libz name 'deflateCopy'; +function deflateReset(var strm: TZStream): integer; cdecl; external libz name 'deflateReset'; +function deflateParams(var strm: TZStream; level: integer; strategy: integer): integer; cdecl; external libz name 'deflateParams'; +//... +function inflateSetDictionary(var strm: TZStream; dictionary: pbytef; dictLength: uInt): integer; cdecl; external libz name 'inflateSetDictionary'; +function inflateSync(var strm: TZStream): integer; cdecl; external libz name 'inflateSync'; +//... +function inflateReset(var strm: TZStream): integer; cdecl; external libz name 'inflateReset'; + +function compress(dest: pbytef; destLen: puLongf; source : pbytef; sourceLen: uLong): integer; cdecl; external libz name 'compress'; +function compress2(dest: pbytef; destLen: puLongf; source : pbytef; sourceLen: uLong; level: integer): integer; cdecl; external libz name 'compress2'; +function uncompress(dest: pbytef; destLen: puLongf; source : pbytef; sourceLen: uLong): integer; cdecl; external libz name 'uncompress'; + +function gzopen(path: pchar; mode: pchar): gzFile; cdecl; external libz name 'gzopen'; +function gzdopen(fd: integer; mode: pchar): gzFile; cdecl; external libz name 'gzdopen'; +function gzsetparams(thefile: gzFile; level: integer; strategy: integer): integer; cdecl; external libz name 'gzsetparams'; +function gzread(thefile: gzFile; buf: pointer; len: cardinal): integer; cdecl; external libz name 'gzread'; +function gzwrite(thefile: gzFile; buf: pointer; len: cardinal): integer; cdecl; external libz name 'gzwrite'; +function gzprintf(thefile: gzFile; format: pbytef; args: array of const): integer; cdecl; external libz name 'gzprintf'; +function gzputs(thefile: gzFile; s: pbytef): integer; cdecl; external libz name 'gzputs'; +function gzgets(thefile: gzFile; buf: pbytef; len: integer): pchar; cdecl; external libz name 'gzgets'; +function gzputc(thefile: gzFile; c: integer): integer; cdecl; external libz name 'gzputc'; +function gzgetc(thefile: gzFile): integer; cdecl; external libz name 'gzgetc'; +function gzflush(thefile: gzFile; flush: integer): integer; cdecl; external libz name 'gzflush'; +function gzseek(thefile: gzFile; offset: z_off_t; whence: integer): z_off_t; cdecl; external libz name 'gzseek'; +function gzrewind(thefile: gzFile): integer; cdecl; external libz name 'gzrewind'; +function gztell(thefile: gzFile): z_off_t; cdecl; external libz name 'gztell'; +function gzeof(thefile: gzFile): integer; cdecl; external libz name 'gzeof'; +function gzclose(thefile: gzFile): integer; cdecl; external libz name 'gzclose'; +function gzerror(thefile: gzFile; var errnum: integer): pchar; cdecl; external libz name 'gzerror'; + +function adler32(adler: uLong; buf: pbytef; len: uInt): uLong; cdecl; external libz name 'adler32'; +function crc32(crc: uLong; buf: pbytef; len: uInt): uLong; cdecl; external libz name 'crc32'; + +function deflateInit_(var strm: TZStream; level: integer; version: pchar; stream_size: integer): integer; cdecl; external libz name 'deflateInit_'; +function deflateInit(var strm: TZStream; level : integer) : integer; +function inflateInit_(var strm: TZStream; version: pchar; stream_size: integer): integer; cdecl; external libz name 'inflateInit_'; +function inflateInit(var strm:TZStream) : integer; +function deflateInit2_(var strm: TZStream; level: integer; method: integer; windowBits: integer; memLevel: integer; strategy: integer; version: pchar; stream_size: integer): integer; cdecl; external libz name 'deflateInit2_'; +function deflateInit2(var strm: TZStream; level, method, windowBits, memLevel, strategy: integer): integer; +function inflateInit2_(var strm: TZStream; windowBits: integer; version: pchar; stream_size: integer): integer; cdecl; external libz name 'inflateInit2_'; +function inflateInit2(var strm: TZStream; windowBits: integer): integer; + +function zErrorpchar(err: integer): pchar; cdecl; external libz name 'zError'; +function zError(err: integer): string; +function inflateSyncPoint(z: PZstream): integer; cdecl; external libz name 'inflateSyncPoint'; +function get_crc_table(): pointer; cdecl; external libz name 'get_crc_table'; + +function zlibAllocMem(AppData: Pointer; Items, Size: Integer): Pointer; cdecl; +procedure zlibFreeMem(AppData, Block: Pointer); cdecl; + +implementation + +function zlibversion(): string; +begin + zlibversion := string(zlibversionpchar); +end; + +function deflateInit(var strm: TZStream; level: integer) : integer; +begin + deflateInit := deflateInit_(strm, level, ZLIB_VERSION, sizeof(TZStream)); +end; + +function inflateInit(var strm: TZStream): integer; +begin + inflateInit := inflateInit_(strm, ZLIB_VERSION, sizeof(TZStream)); +end; + +function deflateInit2(var strm: TZStream; level, method, windowBits, memLevel, strategy: integer) : integer; +begin + deflateInit2 := deflateInit2_(strm, level, method, windowBits, memLevel, strategy, ZLIB_VERSION, sizeof(TZStream)); +end; + +function inflateInit2(var strm: TZStream; windowBits: integer): integer; +begin + inflateInit2 := inflateInit2_(strm, windowBits, ZLIB_VERSION, sizeof(TZStream)); +end; + +function zError(err: integer): string; +begin + zerror := string(zErrorpchar(err)); +end; + +function zlibAllocMem(AppData: Pointer; Items, Size: Integer): Pointer; cdecl; +begin + Result := GetMemory(Items * Size); +end; + +procedure zlibFreeMem(AppData, Block: Pointer); cdecl; +begin + FreeMem(Block); +end; + +end. |