s->avctx = avctx;
- ff_ac3_common_init();
ac3_tables_init();
ff_mdct_init(&s->imdct_256, 8, 1, 1.0);
ff_mdct_init(&s->imdct_512, 9, 1, 1.0);
* Decode the grouped exponents according to exponent strategy.
* reference: Section 7.1.3 Exponent Decoding
*/
-static int decode_exponents(GetBitContext *gbc, int exp_strategy, int ngrps,
+static int decode_exponents(AC3DecodeContext *s,
+ GetBitContext *gbc, int exp_strategy, int ngrps,
uint8_t absexp, int8_t *dexps)
{
int i, j, grp, group_size;
prevexp = absexp;
for (i = 0, j = 0; i < ngrps * 3; i++) {
prevexp += dexp[i] - 2;
- if (prevexp > 24U)
+ if (prevexp > 24U) {
+ av_log(s->avctx, AV_LOG_ERROR, "exponent %d is out-of-range\n", prevexp);
return -1;
+ }
switch (group_size) {
case 4: dexps[j++] = prevexp;
dexps[j++] = prevexp;
for (ch = !cpl_in_use; ch <= s->channels; ch++) {
if (s->exp_strategy[blk][ch] != EXP_REUSE) {
s->dexps[ch][0] = get_bits(gbc, 4) << !ch;
- if (decode_exponents(gbc, s->exp_strategy[blk][ch],
+ if (decode_exponents(s, gbc, s->exp_strategy[blk][ch],
s->num_exp_groups[ch], s->dexps[ch][0],
&s->dexps[ch][s->start_freq[ch]+!!ch])) {
- av_log(s->avctx, AV_LOG_ERROR, "exponent out-of-range\n");
return AVERROR_INVALIDDATA;
}
if (ch != CPL_CH && ch != s->lfe_ch)