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avcodec/prosumer: Only scan as many elements as matter in fill_elements()

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Reviewed-by: Paul B Mahol <onemda@gmail.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer
2018-09-22 18:14:02 +02:00
parent fa1d3caef0
commit 3c9ebcbc4d
1 changed files with 3 additions and 3 deletions
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6
libavcodec/prosumer.c
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@@ -279,12 +279,12 @@ static const uint16_t table[] = {
0x0001 0x0001
}; };
static void fill_elements(uint32_t idx, uint32_t shift, int size, uint32_t *e0, uint32_t *e1) static void fill_elements(uint32_t idx, uint32_t shift, uint32_t *e0, uint32_t *e1)
{ {
uint32_t b, h = idx << (32 - shift); uint32_t b, h = idx << (32 - shift);
for (int j = 0; j < 2; j++) { for (int j = 0; j < 2; j++) {
for (int i = 0; i < size; i++) { for (int i = 0; i < 43; i++) {
b = 4 * TB(i); b = 4 * TB(i);
if (shift >= b && ((h & (0xFFF00000u << (12 - b))) >> 20) == table[2 * i + 1]) { if (shift >= b && ((h & (0xFFF00000u << (12 - b))) >> 20) == table[2 * i + 1]) {
if (table[2 * i] >> 8 == 0x80u) { if (table[2 * i] >> 8 == 0x80u) {
@@ -322,7 +322,7 @@ static void fill_lut(uint32_t *lut)
uint32_t f = 0xFFFFFFFFu; uint32_t f = 0xFFFFFFFFu;
c &= 0xFFFFFFu; c &= 0xFFFFFFu;
if ((c & 0xFF00u) != 0x8000u) if ((c & 0xFF00u) != 0x8000u)
fill_elements(j, d, 365, &c, &f); fill_elements(j, d, &c, &f);
lut[2 * a + 2 * j] = c; lut[2 * a + 2 * j] = c;
lut[2 * a + 2 * j + 1] = f; lut[2 * a + 2 * j + 1] = f;
} }