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  • Committer: Bazaar Package Importer
  • Author(s): Sebastien Bacher
  • Date: 2005-12-17 23:59:34 UTC
  • Revision ID: james.westby@ubuntu.com-20051217235934-qu7f84arvb9r3id3
Tags: upstream-0.10.0
Import upstream version 0.10.0

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gst-libs/ext/ffmpeg/libavutil/mathematics.h
 
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#ifndef MATHEMATICS_H
 
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#define MATHEMATICS_H
 
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#include "rational.h"
 
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enum AVRounding {
 
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    AV_ROUND_ZERO     = 0, ///< round toward zero
 
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    AV_ROUND_INF      = 1, ///< round away from zero
 
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    AV_ROUND_DOWN     = 2, ///< round toward -infinity
 
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    AV_ROUND_UP       = 3, ///< round toward +infinity
 
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    AV_ROUND_NEAR_INF = 5, ///< round to nearest and halfway cases away from zero
 
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};
 
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/**
 
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 * rescale a 64bit integer with rounding to nearest.
 
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 * a simple a*b/c isn't possible as it can overflow
 
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 */
 
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int64_t av_rescale(int64_t a, int64_t b, int64_t c);
 
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/**
 
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 * rescale a 64bit integer with specified rounding.
 
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 * a simple a*b/c isn't possible as it can overflow
 
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 */
 
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int64_t av_rescale_rnd(int64_t a, int64_t b, int64_t c, enum AVRounding);
 
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/**
 
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 * rescale a 64bit integer by 2 rational numbers.
 
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 */
 
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int64_t av_rescale_q(int64_t a, AVRational bq, AVRational cq);
 
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#endif /* MATHEMATICS_H */