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| -rw-r--r-- | Game/Code/lib/ffmpeg/mathematics.pas | 79 |
1 files changed, 79 insertions, 0 deletions
diff --git a/Game/Code/lib/ffmpeg/mathematics.pas b/Game/Code/lib/ffmpeg/mathematics.pas new file mode 100644 index 00000000..42a30925 --- /dev/null +++ b/Game/Code/lib/ffmpeg/mathematics.pas @@ -0,0 +1,79 @@ +unit mathematics; + +interface + +(* + * copyright (c) 2005 Michael Niedermayer <michaelni@gmx.at> + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2 of the License, or (at your option) any later version. + * + * This library 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 + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + *) + +(* This is a part of Pascal porting of ffmpeg. Originally by Victor Zinetz for Delphi and Free Pascal on Windows. +For Mac OS X, some modifications were made by The Creative CAT, denoted as CAT +in the source codes *) + +{$IFDEF FPC} + {$IFDEF LINUX} + {$LINKLIB libavutil} + {$ENDIF} + {$MODE DELPHI } (* CAT *) + {$PACKENUM 4} (* every enum type variables uses 4 bytes, CAT *) + {$PACKRECORDS C} (* GCC compatible, Record Packing, CAT *) +{$ENDIF} + +uses + rational; (* CAT *) + +const +{$IFDEF MSWINDOWS} + av__util = 'avutil-49.dll'; +{$ENDIF} +{$IFDEF LINUX} + av__util = 'libavutil.so'; // .0d +{$ENDIF} +{$IFDEF DARWIN} + av__util = 'libavutil.dylib'; +{$ENDIF} + +type + TAVRounding = ( + AV_ROUND_ZERO = 0, ///< round toward zero + AV_ROUND_INF = 1, ///< round away from zero + AV_ROUND_DOWN = 2, ///< round toward -infinity + AV_ROUND_UP = 3, ///< round toward +infinity + AV_ROUND_NEAR_INF = 5, ///< round to nearest and halfway cases away from zero + AV_ROUND_FUCKING = $FFFFFF + ); + +(** * rescale a 64bit integer with rounding to nearest. + * a simple a*b/c isn't possible as it can overflow *) +function av_rescale (a, b, c: int64): int64; + cdecl; external av__util; + +(** + * rescale a 64bit integer with specified rounding. + * a simple a*b/c isn't possible as it can overflow *) +function av_rescale_rnd (a, b, c: int64; enum: TAVRounding): int64; + cdecl; external av__util; + +(** + * rescale a 64bit integer by 2 rational numbers. *) +function av_rescale_q (a: int64; bq, cq: TAVRational): int64; + cdecl; external av__util; + +implementation + +end. + |