mirror of https://github.com/FFmpeg/FFmpeg.git
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
32 lines
690 B
32 lines
690 B
23 years ago
|
/* tick.h - Compute successive integer multiples of a rational
|
||
|
|
* number without long-term rounding error.
|
||
|
|
* (c)2002 by Lennert Buytenhek <buytenh@gnu.org>
|
||
|
|
* File licensed under the GPL, see http://www.fsf.org/ for more info.
|
||
|
|
* Dedicated to Marija Kulikova.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include "avcodec.h"
|
||
|
|
|
||
|
|
typedef struct Ticker {
|
||
|
|
int value;
|
||
|
|
int inrate;
|
||
|
|
int outrate;
|
||
|
|
int div;
|
||
|
|
int mod;
|
||
|
|
} Ticker;
|
||
|
|
|
||
|
|
extern void ticker_init(Ticker *tick, INT64 inrate, INT64 outrate);
|
||
|
|
|
||
|
|
extern inline int ticker_tick(Ticker *tick, int num)
|
||
|
|
{
|
||
|
|
int n = num * tick->div;
|
||
|
|
|
||
|
|
tick->value += num * tick->mod;
|
||
|
|
while (tick->value > 0) {
|
||
|
|
tick->value -= tick->inrate;
|
||
|
|
n++;
|
||
|
|
}
|
||
|
|
|
||
|
|
return n;
|
||
|
|
}
|