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author | k-m_schindler <k-m_schindler@b956fd51-792f-4845-bead-9b4dfca2ff2c> | 2012-04-18 20:53:24 +0000 |
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committer | k-m_schindler <k-m_schindler@b956fd51-792f-4845-bead-9b4dfca2ff2c> | 2012-04-18 20:53:24 +0000 |
commit | 9bc840d97697bc6445aab17368bad58d02018a2a (patch) | |
tree | 3e2ccb3473a5abdd4bb3eee5d11d49b5d6988403 /src/lib/ffmpeg7/rational.pas | |
parent | e014db6853e12ce89c49f8fd469fd4a3d2b7110f (diff) | |
download | usdx-9bc840d97697bc6445aab17368bad58d02018a2a.tar.gz usdx-9bc840d97697bc6445aab17368bad58d02018a2a.tar.xz usdx-9bc840d97697bc6445aab17368bad58d02018a2a.zip |
Rename ffmpeg7 to ffmpeg-0.7
git-svn-id: svn://svn.code.sf.net/p/ultrastardx/svn/trunk@2855 b956fd51-792f-4845-bead-9b4dfca2ff2c
Diffstat (limited to 'src/lib/ffmpeg7/rational.pas')
-rw-r--r-- | src/lib/ffmpeg7/rational.pas | 170 |
1 files changed, 0 insertions, 170 deletions
diff --git a/src/lib/ffmpeg7/rational.pas b/src/lib/ffmpeg7/rational.pas deleted file mode 100644 index 45ca8b87..00000000 --- a/src/lib/ffmpeg7/rational.pas +++ /dev/null @@ -1,170 +0,0 @@ -(* - * 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 - * avutil version 50.43.0 - * - *) - -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 numerator/denominator - *) - PAVRational = ^TAVRational; - TAVRational = record - num: cint; ///< numerator - den: cint; ///< denominator - end; - - TAVRationalArray = array[0 .. (MaxInt div SizeOf(TAVRational))-1] of TAVRational; - PAVRationalArray = ^TAVRationalArray; - -(** - * 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} - -(** - * Convert rational to double. - * @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_num destination numerator - * @param dst_den destination denominator - * @param num source numerator - * @param den source denominator - * @param max the maximum allowed for dst_num & dst_den - * @return 1 if exact, 0 otherwise - *) -function av_reduce(dst_num: PCint; dst_den: PCint; num: cint64; den: cint64; max: cint64): cint; - cdecl; external av__util; - -(** - * Multiply 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} - -(** - * Divide 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} - -(** - * Add 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} - -(** - * Subtract 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} - -(** - * Convert a double precision floating point number to a rational. - * inf is expressed as {1,0} or {-1,0} depending on the sign. - * - * @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} - -(** - * @return 1 if q1 is nearer to q than q2, -1 if q2 is nearer - * than q1, 0 if they have the same distance. - *) -function av_nearer_q(q, q1, q2: TAVRational): cint; - cdecl; external av__util; - -(** - * Find the nearest value in q_list to q. - * @param q_list an array of rationals terminated by {0, 0} - * @return the index of the nearest value found in the array - *) -function av_find_nearest_q_idx(q: TAVRational; q_list: {const} PAVRationalArray): cint; - cdecl; external av__util; - -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. |