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31 lines
690 B
31 lines
690 B
/* tick.h - Compute successive integer multiples of a rational |
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* number without long-term rounding error. |
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* (c)2002 by Lennert Buytenhek <buytenh@gnu.org> |
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* File licensed under the GPL, see http://www.fsf.org/ for more info. |
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* Dedicated to Marija Kulikova. |
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*/ |
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#include "avcodec.h" |
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typedef struct Ticker { |
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int value; |
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int inrate; |
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int outrate; |
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int div; |
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int mod; |
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} Ticker; |
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extern void ticker_init(Ticker *tick, INT64 inrate, INT64 outrate); |
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static inline int ticker_tick(Ticker *tick, int num) |
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{ |
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int n = num * tick->div; |
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tick->value += num * tick->mod; |
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while (tick->value > 0) { |
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tick->value -= tick->inrate; |
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n++; |
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} |
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return n; |
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}
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