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Merge "gif2webp: kmin = 0 should suppress key-frame addition."

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James Zern 2013-11-01 12:22:26 -07:00 committed by Gerrit Code Review
commit 6d0cb3debf
1 changed files with 24 additions and 9 deletions
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21
examples/gif2webp.c
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@ -42,27 +42,42 @@ static void SanitizeKeyFrameIntervals(size_t* const kmin_ptr,
size_t* const kmax_ptr) {
size_t kmin = *kmin_ptr;
size_t kmax = *kmax_ptr;
int print_warning = 1;
if (kmin == 0) kmin = ~0; // Disable keyframe insertion.
if (kmax == 0) kmax = ~0;
if (kmin == 0) { // Disable keyframe insertion.
kmax = ~0;
kmin = kmax - 1;
print_warning = 0;
}
if (kmax == 0) {
kmax = ~0;
print_warning = 0;
}
if (kmin >= kmax) {
kmin = kmax - 1;
if (print_warning) {
fprintf(stderr,
"WARNING: Setting kmin = %zu, so that kmin < kmax.\n", kmin);
}
} else if (kmin < (kmax / 2 + 1)) {
// This ensures that cache.keyframe + kmin >= kmax is always true. So, we
// can flush all the frames in the ‘count_since_key_frame == kmax’ case.
kmin = (kmax / 2 + 1);
if (print_warning) {
fprintf(stderr,
"WARNING: Setting kmin = %zu, so that kmin >= kmax / 2 + 1.\n",
kmin);
}
}
// Limit the max number of frames that are allocated.
if (kmax - kmin > MAX_CACHE_SIZE) {
kmin = kmax - MAX_CACHE_SIZE;
if (print_warning) {
fprintf(stderr,
"WARNING: Setting kmin = %zu, so that kmax - kmin <= 30.\n", kmin);
"WARNING: Setting kmin = %zu, so that kmax - kmin <= 30.\n",
kmin);
}
}
*kmin_ptr = kmin;
*kmax_ptr = kmax;