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fix 10l (computation based on uninitialized data which led to 

incorrect field matching) and greatly improve selection logic. the
pullup core should be very accurate now, so try throwing tough samples
at it and report any failures! :)


git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@10731 b3059339-0415-0410-9bf9-f77b7e298cf2
This commit is contained in:
rfelker 2003-08-31 17:46:32 +00:00
parent 8a06bf7da7
commit cfa265212a
1 changed files with 23 additions and 9 deletions
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32
libmpcodecs/pullup.c
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@ -321,7 +321,7 @@ static void compute_breaks(struct pullup_context *c, struct pullup_field *f0)
if (-l > max_r) max_r = -l;
}
/* Don't get tripped up when differences are mostly quant error */
if (max_l + max_r < 64) return;
if (max_l + max_r < 256) return;
if (max_l > 4*max_r) f1->breaks |= BREAK_LEFT;
if (max_r > 4*max_l) f2->breaks |= BREAK_RIGHT;
//printf("max_l=%d max_r=%d\n", max_l, max_r);
@ -330,7 +330,7 @@ static void compute_breaks(struct pullup_context *c, struct pullup_field *f0)
static void compute_affinity(struct pullup_context *c, struct pullup_field *f)
{
int i;
int max_l=0, max_r=0, l;
int max_l=0, max_r=0, l, t;
if (f->flags & F_HAVE_AFFINITY) return;
f->flags |= F_HAVE_AFFINITY;
for (i = 0; i < c->metric_len; i++) {
@ -338,16 +338,25 @@ static void compute_affinity(struct pullup_context *c, struct pullup_field *f)
if (l > max_l) max_l = l;
if (-l > max_r) max_r = -l;
}
if (max_l + max_r < 64) return;
if (max_l + max_r < 256) return;
if (max_r > 3*max_l) f->affinity = -1;
else if (max_l > 3*max_r) f->affinity = 1;
else if (max_l + max_r > 2048) {
for (i = 0; i < c->metric_len; i++) {
l += f->licomb[i] - f->next->licomb[i];
t += ABS(f->licomb[i] - f->next->licomb[i]);
}
if (-l*4 > t) f->affinity = -1;
else if (l*4 > t) f->affinity = 1;
//printf("affinity from avg: %d\n", f->affinity);
}
}
static void foo(struct pullup_context *c)
{
struct pullup_field *f = c->first;
int i, n = queue_length(f, c->last);
for (i = 0; i < n; i++) {
for (i = 0; i < n-1; i++) {
if (i < n-3) compute_breaks(c, f);
compute_affinity(c, f);
f = f->next;
@ -369,19 +378,24 @@ static int decide_frame_length(struct pullup_context *c)
n = find_first_break(f0, 3);
if (f0->affinity == -1) return 1;
switch (n) {
case 1:
return 1;
case 2:
if (f0->affinity == -1 || f1->affinity == 1) return 1;
if (f1->affinity == 1) return 1;
else return 2;
case 3:
if (f1->affinity == -1 && f2->affinity != -1) return 2;
else if (f1->affinity == 1 && f0->affinity != 1) return 1;
if (f1->affinity == -1) return 2;
else if (f1->affinity == 1) return 1;
else return 3;
default:
if (f0->affinity == -1 && f1->affinity != -1) return 1;
else if (f1->affinity == 1 && f2->affinity == -1) return 1;
if (f1->affinity == 1) return 1;
else if (f1->affinity == -1) return 2;
else if (f2->affinity == 1) return 2;
else if (f0->affinity == 1 && f2->affinity == -1) return 3;
else if (f2->affinity == 0 && f3->affinity == 1) return 3;
else return 2;
}
}