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-rw-r--r--Game/Code/lib/ffmpeg/rational.pas153
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diff --git a/Game/Code/lib/ffmpeg/rational.pas b/Game/Code/lib/ffmpeg/rational.pas
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-(*
- * Rational numbers
- * Copyright (c) 2003 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.
- * - Changes and updates by the UltraStar Deluxe Team
- *)
-
-(*
- * Conversion of libavutil/rational.h
- * revision 12498, Wed Mar 19 06:17:43 2008 UTC
- *)
-
-unit rational;
-
-{$IFDEF FPC}
- {$MODE DELPHI}
- {$PACKENUM 4} (* use 4-byte enums *)
- {$PACKRECORDS C} (* C/C++-compatible record packing *)
-{$ELSE}
- {$MINENUMSIZE 4} (* use 4-byte enums *)
-{$ENDIF}
-
-{$I switches.inc}
-
-interface
-
-uses
- ctypes,
- UConfig;
-
-type
-(*
- * Rational number num/den.
- *)
- PAVRational = ^TAVRational;
- TAVRational = record
- num: cint; ///< numerator
- den: cint; ///< denominator
- end;
-
-(**
- * Compare two rationals.
- * @param a first rational
- * @param b second rational
- * @return 0 if a==b, 1 if a>b and -1 if a<b.
- *)
-function av_cmp_q(a: TAVRational; b: TAVRational): cint; {$IFDEF HasInline}inline;{$ENDIF}
-
-(**
- * Rational to double conversion.
- * @param a rational to convert
- * @return (double) a
- *)
-function av_q2d(a: TAVRational): cdouble; {$IFDEF HasInline}inline;{$ENDIF}
-
-(**
- * Reduce a fraction.
- * This is useful for framerate calculations.
- * @param dst_nom destination numerator
- * @param dst_den destination denominator
- * @param nom source numerator
- * @param den source denominator
- * @param max the maximum allowed for dst_nom & dst_den
- * @return 1 if exact, 0 otherwise
- *)
-function av_reduce(dst_nom: PCint; dst_den: PCint; nom: cint64; den: cint64; max: cint64): cint;
- cdecl; external av__util;
-
-(**
- * Multiplies two rationals.
- * @param b first rational.
- * @param c second rational.
- * @return b*c.
- *)
-function av_mul_q(b: TAVRational; c: TAVRational): TAVRational;
- cdecl; external av__util; {av_const}
-
-(**
- * Divides one rational by another.
- * @param b first rational.
- * @param c second rational.
- * @return b/c.
- *)
-function av_div_q(b: TAVRational; c: TAVRational): TAVRational;
- cdecl; external av__util; {av_const}
-
-(**
- * Adds two rationals.
- * @param b first rational.
- * @param c second rational.
- * @return b+c.
- *)
-function av_add_q(b: TAVRational; c: TAVRational): TAVRational;
- cdecl; external av__util; {av_const}
-
-(**
- * Subtracts one rational from another.
- * @param b first rational.
- * @param c second rational.
- * @return b-c.
- *)
-function av_sub_q(b: TAVRational; c: TAVRational): TAVRational;
- cdecl; external av__util; {av_const}
-
-(**
- * Converts a double precision floating point number to a rational.
- * @param d double to convert
- * @param max the maximum allowed numerator and denominator
- * @return (AVRational) d.
- *)
-function av_d2q(d: cdouble; max: cint): TAVRational;
- cdecl; external av__util; {av_const}
-
-implementation
-
-function av_cmp_q (a: TAVRational; b: TAVRational): cint;
-var
- tmp: cint64;
-begin
- tmp := a.num * cint64(b.den) - b.num * cint64(a.den);
-
- if (tmp <> 0) then
- Result := (tmp shr 63) or 1
- else
- Result := 0
-end;
-
-function av_q2d(a: TAVRational): cdouble;
-begin
- Result := a.num / a.den;
-end;
-
-end.