1 files changed, 81 insertions, 0 deletions
diff --git a/src/lib/ffmpeg/mathematics.pas b/src/lib/ffmpeg/mathematics.pas
new file mode 100644
index 00000000..2d352df0
--- /dev/null
+++ b/src/lib/ffmpeg/mathematics.pas
@@ -0,0 +1,81 @@
+(*
+ * 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.
+ * - Changes and updates by the UltraStar Deluxe Team
+ *)
+
+(*
+ * Conversion of libavutil/mathematics.h
+ * revision 12498, Wed Mar 19 06:17:43 2008 UTC
+ *)
+
+unit mathematics;
+
+{$IFDEF FPC}
+  {$MODE DELPHI }
+  {$PACKENUM 4}    (* use 4-byte enums *)
+  {$PACKRECORDS C} (* C/C++-compatible record packing *)
+{$ELSE}
+  {$MINENUMSIZE 4} (* use 4-byte enums *)
+{$ENDIF}
+
+interface
+
+uses
+  ctypes,
+  rational,
+  UConfig;
+
+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
+  );
+
+(**
+ * 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: cint64): cint64;
+  cdecl; external av__util; {av_const}
+
+(**
+ * 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: cint64; enum: TAVRounding): cint64;
+  cdecl; external av__util; {av_const}
+
+(**
+ * rescale a 64bit integer by 2 rational numbers.
+ *)
+function av_rescale_q (a: cint64; bq, cq: TAVRational): cint64;
+  cdecl; external av__util; {av_const}
+
+implementation
+
+end.
+