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avfilter/vf_lenscorrection: get rid of floats in init code

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The only remaining floats are in the user interface, they are left as they
should not cause a problem in practice

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2014-08-20 14:15:12 +02:00
parent 2450ca0f33
commit 32cb6c1fe2
1 changed files with 7 additions and 6 deletions
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13
libavfilter/vf_lenscorrection.c
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@ -149,8 +149,8 @@ static int filter_frame(AVFilterLink *inlink, AVFrame *in)
int h = rect->height / vdiv;
int xcenter = rect->cx * w;
int ycenter = rect->cy * h;
float k1 = rect->k1;
float k2 = rect->k2;
int k1 = rect->k1 * (1<<24);
int k2 = rect->k2 * (1<<24);
ThreadData td = {
.in = in,
.out = out,
@ -162,7 +162,7 @@ static int filter_frame(AVFilterLink *inlink, AVFrame *in)
if (!rect->correction[plane]) {
int i,j;
const float r2inv = 4.0 / (w * w + h * h);
const int64_t r2inv = (4LL<<60) / (w * w + h * h);
rect->correction[plane] = av_malloc_array(w, h * sizeof(**rect->correction));
if (!rect->correction[plane])
@ -172,9 +172,10 @@ static int filter_frame(AVFilterLink *inlink, AVFrame *in)
const int off_y2 = off_y * off_y;
for (i = 0; i < w; i++) {
const int off_x = i - xcenter;
const float r2 = (off_x * off_x + off_y2) * r2inv;
const float radius_mult = 1.0f + r2 * k1 + r2 * r2 * k2;
rect->correction[plane][j * w + i] = lrintf(radius_mult * (1<<24));
const int64_t r2 = ((off_x * off_x + off_y2) * r2inv + (1LL<<31)) >> 32;
const int64_t r4 = (r2 * r2 + (1<<27)) >> 28;
const int radius_mult = (r2 * k1 + r4 * k2 + (1LL<<27) + (1LL<<52))>>28;
rect->correction[plane][j * w + i] = radius_mult;
}
}
}