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Diffstat (limited to 'src/lib/ffmpeg7/mathematics.pas')
| -rw-r--r-- | src/lib/ffmpeg7/mathematics.pas | 119 |
1 files changed, 0 insertions, 119 deletions
diff --git a/src/lib/ffmpeg7/mathematics.pas b/src/lib/ffmpeg7/mathematics.pas deleted file mode 100644 index 20ee21c2..00000000 --- a/src/lib/ffmpeg7/mathematics.pas +++ /dev/null @@ -1,119 +0,0 @@ -(* - * 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 - * avutil version 50.43.0 - * - *) - -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; - -const - M_E = 2.7182818284590452354; // e - M_LN2 = 0.69314718055994530942; // log_e 2 - M_LN10 = 2.30258509299404568402; // log_e 10 - M_LOG2_10 = 3.32192809488736234787; // log_2 10 - M_PHI = 1.61803398874989484820; // phi / golden ratio - M_PI = 3.14159265358979323846; // pi - M_SQRT1_2 = 0.70710678118654752440; // 1/sqrt(2) - M_SQRT2 = 1.41421356237309504880; // sqrt(2) - NAN = 0.0/0.0; - INFINITY = 1.0/0.0; - -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. - ); - -(** - * Return the greatest common divisor of a and b. - * If both a or b are 0 or either or both are <0 then behavior is - * undefined. - *) -function av_gcd(a: cint64; b: cint64): cint64; - cdecl; external av__util; {av_const} - -(** - * Rescale a 64-bit 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 64-bit 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 64-bit integer by 2 rational numbers. - *) -function av_rescale_q (a: cint64; bq, cq: TAVRational): cint64; - cdecl; external av__util; {av_const} - -(** - * Compare 2 timestamps each in its own timebases. - * The result of the function is undefined if one of the timestamps - * is outside the int64_t range when represented in the others timebase. - * @return -1 if ts_a is before ts_b, 1 if ts_a is after ts_b or 0 if they represent the same position - *) -function av_compare_ts(ts_a: cint64; tb_a: TAVRational; ts_b: cint64; tb_b: TAVRational): cint; - cdecl; external av__util; - -(** - * Compare 2 integers modulo mod. - * That is we compare integers a and b for which only the least - * significant log2(mod) bits are known. - * - * @param mod must be a power of 2 - * @return a negative value if a is smaller than b - * a positiv value if a is greater than b - * 0 if a equals b - *) -function av_compare_mod(a: cuint64; b: cuint64; modVar: cuint64): cint64; - cdecl; external av__util; - -implementation - -end. |