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avfilter/phase: make the main loop readable.

This commit is contained in:
Clément Bœsch 2014-05-08 23:48:55 +02:00
parent 5df10150d4
commit 5623a10526
1 changed files with 9 additions and 4 deletions
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13
libavfilter/vf_phase.c
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@ -122,8 +122,6 @@ static enum PhaseMode analyze_plane(void *ctx, enum PhaseMode mode, AVFrame *old
const int h = new->height;
const int w = new->width;
int bdif, tdif, pdif;
const uint8_t *end, *rend;
int top, t;
if (mode == AUTO) {
mode = new->interlaced_frame ? new->top_field_first ?
@ -136,10 +134,14 @@ static enum PhaseMode analyze_plane(void *ctx, enum PhaseMode mode, AVFrame *old
if (mode <= BOTTOM_FIRST) {
bdiff = pdiff = tdiff = 65536.0;
} else {
int top = 0, t;
const uint8_t *rend, *end = nptr + (h - 2) * ns;
bdiff = pdiff = tdiff = 0.0;
for (end = nptr + (h - 2) * ns, nptr += ns, optr += os, top = 0;
nptr < end; nptr += ns - w, optr += os - w, top ^= 1) {
nptr += ns;
optr += os;
while (nptr < end) {
pdif = tdif = bdif = 0;
switch (mode) {
@ -204,6 +206,9 @@ static enum PhaseMode analyze_plane(void *ctx, enum PhaseMode mode, AVFrame *old
pdiff += (double)pdif;
tdiff += (double)tdif;
bdiff += (double)bdif;
nptr += ns - w;
optr += os - w;
top ^= 1;
}
scale = 1.0 / (w * (h - 3)) / 25.0;