@@ -955,9 +955,20 @@ static void long_filter_high_3800(int32_t *buffer, int order, int shift, int len
for (i = order; i < length; i++) {
dotprod = 0;
sign = APESIGN(buffer[i]);
- for (j = 0; j < order; j++) {
- dotprod += delayp[j] * (unsigned)coeffs[j];
- coeffs[j] += ((delayp[j] >> 31) | 1) * sign;
+ if (sign == 1) {
+ for (j = 0; j < order; j++) {
+ dotprod += delayp[j] * (unsigned)coeffs[j];
+ coeffs[j] += (delayp[j] >> 31) | 1;
+ }
+ } else if (sign == -1) {
+ for (j = 0; j < order; j++) {
+ dotprod += delayp[j] * (unsigned)coeffs[j];
+ coeffs[j] -= (delayp[j] >> 31) | 1;
+ }
+ } else {
+ for (j = 0; j < order; j++) {
+ dotprod += delayp[j] * (unsigned)coeffs[j];
+ }
}
buffer[i] -= (unsigned)(dotprod >> shift);
delayp ++;
930 -> 850 cycles Signed-off-by: Michael Niedermayer <michael@niedermayer.cc> --- libavcodec/apedec.c | 17 ++++++++++++++--- 1 file changed, 14 insertions(+), 3 deletions(-)