diff options
Diffstat (limited to 'src/lib/ffmpeg-1.1/libavutil')
| -rw-r--r-- | src/lib/ffmpeg-1.1/libavutil/mathematics.pas | 30 |
1 files changed, 25 insertions, 5 deletions
diff --git a/src/lib/ffmpeg-1.1/libavutil/mathematics.pas b/src/lib/ffmpeg-1.1/libavutil/mathematics.pas index d4e3c01f..7dcb5e1e 100644 --- a/src/lib/ffmpeg-1.1/libavutil/mathematics.pas +++ b/src/lib/ffmpeg-1.1/libavutil/mathematics.pas @@ -1,5 +1,5 @@ (* - * copyright (c) 2005 Michael Niedermayer <michaelni@gmx.at> + * copyright (c) 2005-2012 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 @@ -22,7 +22,7 @@ * - Changes and updates by the UltraStar Deluxe Team * * Conversion of libavutil/mathematics.h - * avutil version 51.54.100 + * avutil version 52.13.100 * *) @@ -35,8 +35,8 @@ const 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; + NAN = $7fc00000; + INFINITY = $7f800000; (** * @addtogroup lavu_math @@ -49,7 +49,8 @@ type 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_NEAR_INF = 5, ///< Round to nearest and halfway cases away from zero. + AV_ROUND_PASS_MINMAX = 8192 ///< Flag to pass INT64_MIN/MAX through instead of rescaling, this avoids special cases for AV_NOPTS_VALUE ); (** @@ -70,6 +71,9 @@ function av_rescale (a, b, c: cint64): cint64; (** * Rescale a 64-bit integer with specified rounding. * A simple a*b/c isn't possible as it can overflow. + * + * @return rescaled value a, or if AV_ROUND_PASS_MINMAX is set and a is + * INT64_MIN or INT64_MAX then a is passed through unchanged. *) function av_rescale_rnd (a, b, c: cint64; enum: TAVRounding): cint64; cdecl; external av__util; {av_const} @@ -82,6 +86,9 @@ function av_rescale_q (a: cint64; bq, cq: TAVRational): cint64; (** * Rescale a 64-bit integer by 2 rational numbers with specified rounding. + * + * @return rescaled value a, or if AV_ROUND_PASS_MINMAX is set and a is + * INT64_MIN or INT64_MAX then a is passed through unchanged. *) function av_rescale_q_rnd(a: cint64; bq, cq: TAVRational; enum: TAVRounding): cint64; @@ -108,3 +115,16 @@ function av_compare_ts(ts_a: cint64; tb_a: TAVRational; ts_b: cint64; tb_b: TAVR *) function av_compare_mod(a: cuint64; b: cuint64; modVar: cuint64): cint64; cdecl; external av__util; + +(** + * Rescale a timestamp while preserving known durations. + * + * @param in_ts Input timestamp + * @param in_tb Input timesbase + * @param fs_tb Duration and *last timebase + * @param duration duration till the next call + * @param out_tb Output timesbase + *) +function av_rescale_delta(in_tb: TAVRational; in_ts: cint64; fs_tb: TAVRational; duration: cint; last: Pcint64; out_tb: TAVRational): cint64; + cdecl; external av__util; + |