1 files changed, 96 insertions, 0 deletions
diff --git a/Game/Code/lib/ffmpeg/rational.pas b/Game/Code/lib/ffmpeg/rational.pas
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+++ 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 *)
+
+unit rational;
+{$IFDEF FPC}
+  {$MODE DELPHI}  (* CAT *)
+  {$PACKENUM 4}    (* every enum type variables uses 4 bytes, CAT *)
+  {$PACKRECORDS C}    (* GCC compatible, Record Packing, CAT *)
+{$ENDIF}
+
+interface		(* unit windows is deleted by CAT *)
+
+const
+  {$IFDEF win32}
+    av__util = 'avutil-49.dll';
+  {$ELSE}
+    av__util = 'libavutil.so';  // .0d
+//    av__util = 'libavutil.49';
+  {$ENDIF}
+type
+
+(*
+ * Rational number num/den. *)
+  PAVRational = ^TAVRational;
+  TAVRational = record
+    num: integer; ///< numerator
+    den: integer; ///< denominator
+  end;
+
+(**
+ * returns 0 if a==b, 1 if a>b and -1 if a<b.
+ *)
+function av_cmp_q(a: TAVRational; b: TAVRational): integer;
+
+(**
+ * converts the given AVRational to a double.
+ *)
+function av_q2d(a: TAVRational): double;
+
+(**
+ * reduce a fraction.
+ * this is usefull for framerate calculations
+ * @param max the maximum allowed for dst_nom & dst_den
+ * @return 1 if exact, 0 otherwise
+ *)
+function av_reduce(dst_nom: pinteger; dst_den: PInteger; nom: int64; den: int64; max: int64): integer;
+  cdecl; external av__util;
+
+function av_mul_q(b: TAVRational; c: TAVRational): TAVRational;
+  cdecl; external av__util;
+function av_div_q(b: TAVRational; c: TAVRational): TAVRational;
+  cdecl; external av__util;
+function av_add_q(b: TAVRational; c: TAVRational): TAVRational;
+  cdecl; external av__util;
+function av_sub_q(b: TAVRational; c: TAVRational): TAVRational;
+  cdecl; external av__util;
+function av_d2q(d: double; max: integer): TAVRational;
+  cdecl; external av__util;
+
+implementation
+
+function av_cmp_q (a: TAVRational; b: TAVRational): integer;
+var
+  tmp: int64;
+begin
+  tmp := a.num * b.den - b.num * a.den;
+
+  if tmp <> 0 then Result := (tmp shr 63) or 1 (* fixed by CAT *)
+              else Result := 0
+end;
+
+function av_q2d(a: TAVRational): double;
+begin
+  Result := a.num / a.den;
+end;
+
+end.