mirrors/alsa-lib
1
0
Fork 0
mirror of https://github.com/alsa-project/alsa-lib.git synced 2025-11-05 13:30:00 -05:00
Code Issues Projects Releases Packages Wiki Activity Actions 1

Fixed rounding issues

Browse source
This commit is contained in:
Abramo Bagnara 2000-12-10 12:08:20 +00:00
parent 5465c299ab
commit b5e96c0161
2 changed files with 38 additions and 19 deletions
Download patch file Download diff file Expand all files Collapse all files

43
src/pcm/pcm_local.h
View file

@ -280,28 +280,39 @@ static inline ssize_t _snd_pcm_readn(snd_pcm_t *pcm, void **bufs, size_t size)
return pcm->fast_ops->readn(pcm->fast_op_arg, bufs, size);
}
static inline ssize_t muldiv(ssize_t a, ssize_t b, ssize_t d, ssize_t corr)
static inline int muldiv(int a, int b, int c, int *r)
{
double v = ((double) a * b + corr) / d;
if (v > LONG_MAX)
return LONG_MAX;
if (v < LONG_MIN)
return LONG_MIN;
int64_t n = (int64_t)a * b;
int64_t v = n / c;
if (v > INT_MAX) {
*r = 0;
return INT_MAX;
}
if (v < INT_MIN) {
*r = 0;
return INT_MIN;
}
*r = n % c;
return v;
}
static inline ssize_t muldiv_down(ssize_t a, ssize_t b, ssize_t d)
static inline int muldiv_down(int a, int b, int c)
{
return muldiv(a, b, d, 0);
int64_t v = (int64_t)a * b / c;
if (v > INT_MAX) {
return INT_MAX;
}
if (v < INT_MIN) {
return INT_MIN;
}
return v;
}
static inline ssize_t muldiv_up(ssize_t a, ssize_t b, ssize_t d)
static inline int muldiv_near(int a, int b, int c)
{
return muldiv(a, b, d, d - 1);
int r;
int n = muldiv(a, b, c, &r);
if (r >= (c + 1) / 2)
n++;
return n;
}
static inline ssize_t muldiv_near(ssize_t a, ssize_t b, ssize_t d)
{
return muldiv(a, b, d, d / 2);
}