---
libavcodec/ac3enc.c | 12 +++++++-----
1 files changed, 7 insertions(+), 5 deletions(-)
diff --git a/libavcodec/ac3enc.c b/libavcodec/ac3enc.c
index 5db6e3b..eed65f3 100644
--- a/libavcodec/ac3enc.c
+++ b/libavcodec/ac3enc.c
@@ -521,11 +521,13 @@ static void apply_rematrixing(AC3EncodeContext *s)
*/
static av_cold void exponent_init(AC3EncodeContext *s)
{
- int i;
- for (i = 73; i < 256; i++) {
- exponent_group_tab[0][i] = (i - 1) / 3;
- exponent_group_tab[1][i] = (i + 2) / 6;
- exponent_group_tab[2][i] = (i + 8) / 12;
+ int expstr, i, grpsize;
+
+ for (expstr = EXP_D15-1; expstr <= EXP_D45-1; expstr++) {
+ grpsize = 3 << expstr;
+ for (i = 73; i < 256; i++) {
+ exponent_group_tab[expstr][i] = (i + grpsize - 4) / grpsize;
+ }
}
/* LFE */
exponent_group_tab[0][7] = 2;
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