diff options
Diffstat (limited to 'Lua/src/lib/ffmpeg/rational.pas')
| -rw-r--r-- | Lua/src/lib/ffmpeg/rational.pas | 66 |
1 files changed, 35 insertions, 31 deletions
diff --git a/Lua/src/lib/ffmpeg/rational.pas b/Lua/src/lib/ffmpeg/rational.pas index 02d594ff..4b8a2dc8 100644 --- a/Lua/src/lib/ffmpeg/rational.pas +++ b/Lua/src/lib/ffmpeg/rational.pas @@ -1,5 +1,5 @@ (* - * Rational numbers + * rational numbers * Copyright (c) 2003 Michael Niedermayer <michaelni@gmx.at> * * This library is free software; you can redistribute it and/or @@ -27,7 +27,13 @@ (* * Conversion of libavutil/rational.h - * revision 15415, Thu Sep 25 19:23:13 2008 UTC + * revision 16912, Sun Feb 1 02:00:19 2009 UTC + * + * update, MiSchi, no code change + * Fri Jun 12 2009 22:20:00 UTC + * + * update, MiSchi, no code change needed + * Sun Dec 6 2009 22:20:00 UTC *) unit rational; @@ -49,9 +55,9 @@ uses UConfig; type -(* - * Rational number num/den. - *) + (* + * rational number numerator/denominator + *) PAVRational = ^TAVRational; TAVRational = record num: cint; ///< numerator @@ -62,65 +68,65 @@ type PAVRationalArray = ^TAVRationalArray; (** - * Compare two rationals. + * Compares two rationals. * @param a first rational * @param b second rational - * @return 0 if a==b, 1 if a>b and -1 if a<b. + * @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} (** - * Rational to double conversion. + * Converts rational to double. * @param a rational to convert * @return (double) a *) function av_q2d(a: TAVRational): cdouble; {$IFDEF HasInline}inline;{$ENDIF} (** - * Reduce a fraction. + * Reduces a fraction. * This is useful for framerate calculations. - * @param dst_nom destination numerator + * @param dst_num destination numerator * @param dst_den destination denominator - * @param nom source numerator + * @param num source numerator * @param den source denominator - * @param max the maximum allowed for dst_nom & dst_den + * @param max the maximum allowed for dst_num & dst_den * @return 1 if exact, 0 otherwise *) -function av_reduce(dst_nom: PCint; dst_den: PCint; nom: cint64; den: cint64; max: cint64): cint; +function av_reduce(dst_num: PCint; dst_den: PCint; num: cint64; den: cint64; max: cint64): cint; cdecl; external av__util; (** * Multiplies two rationals. - * @param b first rational. - * @param c second rational. - * @return b*c. + * @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} (** * Divides one rational by another. - * @param b first rational. - * @param c second rational. - * @return b/c. + * @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} (** * Adds two rationals. - * @param b first rational. - * @param c second rational. - * @return b+c. + * @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} (** * Subtracts one rational from another. - * @param b first rational. - * @param c second rational. - * @return b-c. + * @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} @@ -129,28 +135,26 @@ function av_sub_q(b: TAVRational; c: TAVRational): TAVRational; * Converts a double precision floating point number to a rational. * @param d double to convert * @param max the maximum allowed numerator and denominator - * @return (AVRational) d. + * @return (AVRational) d *) function av_d2q(d: cdouble; max: cint): TAVRational; cdecl; external av__util; {av_const} {$IF LIBAVUTIL_VERSION >= 49011000} // 49.11.0 - (** - * @return 1 if \q1 is nearer to \p q than \p q2, -1 if \p q2 is nearer - * than \p q1, 0 if they have the same distance. + * @return 1 if q1 is nearer to q than q2, -1 if q2 is nearer + * than q1, 0 if they have the same distance. *) function av_nearer_q(q, q1, q2: TAVRational): cint; cdecl; external av__util; (** - * Finds the nearest value in \p q_list to \p q. + * Finds the nearest value in q_list to q. * @param q_list an array of rationals terminated by {0, 0} * @return the index of the nearest value found in the array *) function av_find_nearest_q_idx(q: TAVRational; q_list: {const} PAVRationalArray): cint; cdecl; external av__util; - {$IFEND} implementation |