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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
*)
uses
windows, rational;
const
av__util = 'avutil-49.dll';
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.
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