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avutil: add av_rescale_q_rnd() to allow different rounding

This commit is contained in:
Justin Ruggles 2012-02-13 15:35:00 -05:00
parent 0996f406c4
commit 0b42a9388c
4 changed files with 19 additions and 3 deletions
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3
doc/APIchanges
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@ -13,6 +13,9 @@ libavutil: 2011-04-18
API changes, most recent first:
2012-02-xx - xxxxxxx - lavu 51.23.1 - mathematics.h
Add av_rescale_q_rnd()
2012-02-xx - xxxxxxx - lavu 51.22.1 - pixdesc.h
Add PIX_FMT_PSEUDOPAL flag.

2
libavutil/avutil.h
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@ -154,7 +154,7 @@
*/
#define LIBAVUTIL_VERSION_MAJOR 51
#define LIBAVUTIL_VERSION_MINOR 22
#define LIBAVUTIL_VERSION_MINOR 23
#define LIBAVUTIL_VERSION_MICRO 1
#define LIBAVUTIL_VERSION_INT AV_VERSION_INT(LIBAVUTIL_VERSION_MAJOR, \

11
libavutil/mathematics.c
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@ -130,10 +130,17 @@ int64_t av_rescale(int64_t a, int64_t b, int64_t c){
return av_rescale_rnd(a, b, c, AV_ROUND_NEAR_INF);
}
int64_t av_rescale_q(int64_t a, AVRational bq, AVRational cq){
int64_t av_rescale_q_rnd(int64_t a, AVRational bq, AVRational cq,
enum AVRounding rnd)
{
int64_t b= bq.num * (int64_t)cq.den;
int64_t c= cq.num * (int64_t)bq.den;
return av_rescale_rnd(a, b, c, AV_ROUND_NEAR_INF);
return av_rescale_rnd(a, b, c, rnd);
}
int64_t av_rescale_q(int64_t a, AVRational bq, AVRational cq)
{
return av_rescale_q_rnd(a, bq, cq, AV_ROUND_NEAR_INF);
}
int av_compare_ts(int64_t ts_a, AVRational tb_a, int64_t ts_b, AVRational tb_b){

6
libavutil/mathematics.h
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@ -95,6 +95,12 @@ int64_t av_rescale_rnd(int64_t a, int64_t b, int64_t c, enum AVRounding) av_cons
*/
int64_t av_rescale_q(int64_t a, AVRational bq, AVRational cq) av_const;
/**
* Rescale a 64-bit integer by 2 rational numbers with specified rounding.
*/
int64_t av_rescale_q_rnd(int64_t a, AVRational bq, AVRational cq,
enum AVRounding) av_const;
/**
* Compare 2 timestamps each in its own timebases.
* The result of the function is undefined if one of the timestamps